МЕТАЛЛИЧЕСКИЕ ТОНЕРНЫЕ КОМПОЗИЦИИ

Заявленная группа изобретений относится к области печатающих систем для тонерных применений и включает варианты тонерных композиций и способ получения тонера. Причем тонерная композиция содержит: тонерную частицу, имеющую поверхность, при этом указанная тонерная частица содержит по меньшей мере одну тонерную смолу, металлический пигмент, связанный с поверхностью тонерной частицы и изолирующую поверхностную добавку, нанесенную поверх металлического пигмента, при этом изолирующая поверхностная добавка представляет собой кремнийорганическое масло. Технический результат заключается в обеспечении улучшенного металлического эффекта тонера и в повышении надежности способа получения серебряного металлического тонера. 3 н. и 12 з.п. ф-лы, 1 табл., 3 ил.

ТОНЕР ДЛЯ ФОРМИРОВАНИЯ ЭЛЕКТРОСТАТИЧЕСКИХ ИЗОБРАЖЕНИЙ И ПРОЯВИТЕЛЬ

... п1. Тонер, содержащий:полимерное связующее, содержащее некристаллическую полиэфирную смолу и кристаллическую полиэфирную смолу;красящее вещество; ивоск,при этом тонер удовлетворяет следующей формуле 1 и имеет тангенс угла потерь 1 или менее при 80°C или выше,B-A<20Формула 1,где A представляет собой температуру плавления кристаллической полиэфирной смолы, а B представляет собой температуру, при которой тонер имеет модуль накопления G' 20000 Па.2. Тонер по п. 1, при этом кристаллическая полиэфирная смола содержится в количестве от 1 массовой части до 15 мас. Ч. на 100 мас. Ч. полимерного связующего.3. Тонер по п. 1, при этом тонер получен способом, включающим:диспергирование в водной среде масляной фазы, в которой в органическом растворителе содержится по меньшей мере полимерное связующее, содержащее кристаллическую полиэфирную смолу и некристаллическую полиэфирную смолу, для приготовления жидкой дисперсии М/В; иудаление органического растворителя из жидкой дисперсии М/В.4. Тонер по п. 3, ...

Verfahren zur Herstellung von elektrostatischen Tonern

Tonerzusammensetzungen aus biologisch abbaubaren amorphen Polyesterharzen

Es wird ein Toner offenbart, der ein Gemisch eines biobasierten amorphen Polyesterharzes, eines kristallinen Polyesterharzes und eines Farbmittels umfasst.

Toner und Herstellverfahren für Toner

Toner, der ein Tonerpartikel umfasst, das eine Kern-Schale-Struktur aufweist, die einen Kern und eine Schale auf dem Kern enthält, wobeider Kern ein amorphes Harz A und ein kristallines Harz umfasst,die Schale ein amorphes Harz B umfasst,das amorphe Harz A ein Styrol-Acrylharz umfasst,ein Gehalt des Styrol-Acrylharzes, bezogen auf die Gesamtmasse des amorphen Harzes A, mindestens 50 Massen-% beträgt,ein mit folgender Formel (X) berechner Kompatibilitätsgrad A zwischen dem amorphen Harz A und dem kristallinen Harz mindestens 50% und nicht mehr als 100% beträgt:Kompatibilitätsgrad A (%)=100−(100×ΔH(A))/(ΔH(C)×C/100)undein mit folgender Formel (Y) berechner Kompatibilitätsgrad B zwischen dem amorphen Harz B und dem kristallinen Harz mindestens 0% und nicht mehr als 40% beträgt:Kompatibilitätsgrad B (%)=100−(100×ΔH(B))/(ΔH(C)×D/100)wobei in den Formeln (X) und (Y)ΔH(A) eine exotherme Quantität (in J/g) eines exothermen Peaks einer Harzmischung A bei einer kalorimetrischen Analyse mittels Differentialabtastung ...

Pulverrundkorn

Die vorliegende Erfindung betrifft ein Tonerpulver, bei dem die Pulverteilchen eine runde Form aufweisen, ein Verfahren zu dessen Herstellung und seine Verwendung.

Toner für die Entwicklung eines elektrostatischen Bildes

Die vorliegende Erfindung betrifft einen Toner für die Entwicklung eines elektrostatischen Bildes, erhältlich mit einem Verfahren, das die Schritte (I) Schmelzkneten eines Ausgangsmaterialgemisches, das ein Harzbindemittel, ein Trennmittel und ein Farbmittel enthält; Abkühlen des schmelzgekneteten Gemisches; und Pulverisieren des abgekühlten Gemisches; und (II) weiter Pulverisieren eines im Schritt (I) erhaltenen pulverisierten Produkts in Gegenwart eines externen Zusatzstoffes, der mindestens zwei Arten von einer hydrophoben Behandlung unterzogenen anorganischen Oxiden enthält, die voneinander unterschiedliche mittlere Teilchengrößen aufweisen; und Klassieren des pulverisierten Produkts, wobei die der hydrophoben Behandlung unterzogenen anorganischen Oxide im Schritt (II) eine mittlere Teilchengröße von 20 nm oder weniger und einen Unterschied in der mittleren Teilchengröße von 3 bis 10 nm aufweisen; und ein Verfahren zur Herstellung des Toners. Der erfindungsgemäße Toner kann geeigneterweise ...

MAGNETISCHER TONER

METHOD FOR PREPARING TONER CONTAINING CARBON BLACK PIGMENT WITH LOW SURFACE SULFUR LEVELS

Disclosed is a process for preparing toner particles which comprises: (a) selecting a carbon black; (b) measuring the surface level of sulfur of the carbon black by X-ray Photoelectron Spectroscopy to ensure that the surface level of sulfur is no more than about 0.05 atomic percent; and (c) mixing the carbon black with a resin to generate a toner composition.

SUPER LOW MELT AND ULTRA LOW MELT TONERS CONTAINING CRYSTALLINE SULFONATED POLYESTER

A toner is disclosed that includes a toner binder of crystalline sulfonated polyester, wherein the crystalline sulfonated polyester is 90% by weight or more of the toner binder, and a colorant. In other embodiments, the toner includes a crystalline sulfonated polyester and a linear amorphous sulfonated polyester, and a colorant. In these embodiments, the crystalline sulfonated polyester is from about 20% to about 60% by weight of the toner binder and the linear amorphous sulfonated polyester is from about 40% to about 80% by weight of the toner binder. The toners possess excellent minimum fixing temperatures in the range of from about 80.degree.C to about 130.degree.C. Processes for preparing the toners are also described.

METALLIC TONER COMPOSITIONS

A toner composition including a toner particle having a surface, wherein the toner particle comprises at least one toner resin; a metallic pigment bonded to the surface of the toner particle; and an insulative surface additive disposed over the metallic pigment.

TONER COMPOSITIONS AND PROCESSES

Disclosed are toner compositions that include an amorphous polyester resin, a crystalline polyester resin, a colorant and a wax, and where the amorphous polyester resin contains in excess of zero weight percent of dodecylsuccinic anhydride to less than 16 weight percent of dodecylsuccinic anhydride, or where the amorphous polyester resin contains in excess of zero weight percent of dodecylsuccinic acid to less than 16 weight percent of dodecylsuccinic acid.

METALLIC TONER COMPRISING METAL INTEGRATED PARTICLES

A toner and a toner process including providing at least one hybrid metallic toner component selected from the group consisting of hybrid metallic-latex particles, hybrid metallic-wax particles, hybrid metallic-colorant particles, and combinations thereof; contacting the at least one hybrid metallic toner component with one or more components selected from the group consisting of a latex polymer, a wax; and a colorant to form a blend; heating the blend at a temperature below the glass transition temperature of the latex polymer to form aggregated toner particles; adding a coalescing agent to the toner particles thereby coalescing the toner particles; and recovering the toner particles.

TONER FOR DEVELOPING ELECTROSTATIC IMAGES AND DEVELOPER

To provide a toner containing: a binder resin containing a non-crystalline polyester resin and a crystalline polyester resin; a colorant; and wax, wherein the toner satisfies the following formula 1, and has loss tangent of 1 or smaller at 80°C or higher, B?A < 20 Formula 1 where A represents a melting point of the crystalline polyester resin and B represents a temperature at which the toner has storage modulus G' of 20,000 Pa.

TONER FOR DEVELOPING ELECTROSTATIC IMAGES AND DEVELOPER

To provide a toner containing: a binder resin containing a non-crystalline polyester resin and a crystalline polyester resin; a colorant; and wax, wherein the toner satisfies the following formula 1, and has loss tangent of 1 or smaller at 80°C or higher, B?A < 20 Formula 1 where A represents a melting point of the crystalline polyester resin and B represents a temperature at which the toner has storage modulus G' of 20,000 Pa.

Magnetic toner

Bio-toner containing bio-resin, method for making the same, and method for printing with bio-toner containing bio-resin

Method for producing toner for electrostatic image development

A method for producing a toner for electrostatic image development including the step of melt-kneading a mixture containing a resin binder and a wax, wherein the resin binder contains an amorphous polyester (A) obtained by polycondensing an alcohol component containing an aliphatic diol (a) having 3 or 4 carbon atoms, the aliphatic diol having a hydroxyl group bonded to a secondary carbon atom, and an aliphatic diol (b) containing one or more +-, -linear alkanediols having 2, 4, 6 or 8 carbon atoms, and a carboxylic acid component. The toner for electrostatic image development can be suitably used in, for example, the development or the like of latent image formed in an electrostatic development method, an electrostatic recording method, an electrostatic printing method, or the like ...

입자의 제조 방법 및 입자 제조 장치

... 본 발명은, 다단 분할 유로형 마이크로혼합기를 이용하여 압축성 유체와 압가소성 재료를 접촉시켜 상기 압축성 유체가 용해된 상기 압가소성 재료의 용융물을 생성하는 단계; 및 상기 압가소성 재료의 용융물을 분사하여 입자를 형성하는 단계를 포함하는 입자 제조 방법을 제공하며, 상기 압가소성 재료는 카르보닐 구조 -C(=O)-를 갖는 수지이고, 상기 압가소성 재료의 용융물을 분사할 때의 온도 및 압력 조건에서 측정한 상기 용융물의 점도가 500 mPaㆍs 이하이다.

MAGNETIC TONER

토너용 결합제 수지, 토너 및 그의 제조 방법

... 본 발명의 토너용 수지는, 이소소르바이드 유래의 구성 단위를 포함하고 연화 온도가 120℃ 초과인 폴리에스테르 수지 (A)와, 상기 폴리에스테르 수지 (A)와는 상이한 폴리에스테르 수지 (B)를 포함하고, 분쇄성 지수가 25 이상이다.

Aqueous dispersions for use as toners

A compound that includes an aqueous dispersion, wherein the dispersion includes a thermoplastic resin and at least one stabilizing agent, and at least one selected from the group consisting of a colorant and a magnetic pigment, wherein the dispersion has an average volume diameter particle size from about 0.05 to about 10 microns is described.

ELECTROPHOTOGRAPHIC TONER COMPRISING A HIGH-MELTING WAX, A PRINTING SYSTEM FOR APPLYING SAID TONER ON AN IMAGE RECEIVING MEDIUM AND A METHOD FOR PREPARING SAID TONER

The invention relates to a toner for developing a toner image, the toner comprising a binder resin, an inorganic component and a wax. The wax is finely dispersed within the toner and has a melting transition, wherein the lower temperature limit of the melting transition is between 110 ºC and 140 ºC at the time of temperature rise in the DSC curve measured using a differential scanning calorimeter. The invention further relates to a printing system for applying the toner according to the present invention on an image receiving medium. The invention further relates to a method for preparing the toner according to the present invention.

Magnetic toner

TONER FOR ELECTROPHOTOGRAPHY

This invention provides a toner for a method for image formation by electrophotography, particularly a toner that, in a one-component development method, has stable fluidity and electrostatic properties for a long period of time, is free from image defects, and is also excellent in transferability and transfer efficiency. The toner for electrophotography comprises matrix toner particles and at least titanium oxide fine particles and fluidizer fine particles deposited on the surface of matrix toner particles. The titanium oxide fine particles are spherical and have an average primary particle diameter of 200 to 400 nm. The fluidizer fine particles have a specific surface area of 60 to 250 m2/g.

METHOD FOR MANUFACTURING ECO-FRIENDLY TONER

Disclosed is a method for manufacturing a toner. The method for manufacturing a toner of the present invention manufactures polyester resin dispersed liquid by inserting ingredients according to a specific order into a single reactor, thereby enabling the manufacturing of a toner particle having a low content of residual VOC, a narrow particle size distribution, an excellent low temperature fixability, and an excellent image quality.

SECURE IMAGING TONER AND METHODS OF FORMING AND USING THE SAME

A toner for printing documents that are difficult to chemically or physically forge and that are readily easy to visually verify and methods of using and forming the toner are disclosed. The toner includes a colorant for printing an image on a surface of a document, a fluorescent pigment that under normal lighting is masked by the colorant but creates a visible image on the first surface of the a substrate when irradiated by black or ultra-violet light, and a dye for forming a latent version of the image underneath a surface of a substrate. An image formed using the toner of the invention is readily verified by comparing the colorant-formed image and the dye-formed image. In addition, if a solvent is used in an attempt to alter the printed image on the substrate, the dye migrates or diffuses to indicate tampering with the document.

TONER, TWO-COMPONENT DEVELOPER, AND IMAGE FORMING METHOD

A toner has a weight-average particle diameter (D4) of 3.0 μm or more and 8.0 μm or less, wherein the average circularity analyzed by dividing particles of the toner having an equivalent circle diameter of 1.98 μm or more and less than 200.00 μm into 800 in a range of a circularity of 0.200 or more and 1.000 or less is 0.960 or more and 0.985 or less, the proportion of particles A having a circularity of 0.990 or more and 1.000 or less is 25.0% or less on a basis of the number of particles, and the ratio of particles B having an equivalent circle diameter of 0.50 μm or more and less than 1.98 μm to the total particles having an equivalent circle diameter of 0.50 μm or more and less than 200.00 μm is 10.0% or less on a basis of the number of particles.

Toner for electrostatic image development

The present invention relates to a toner for electrostatic image development, obtainable by a process including the steps of (I) melt-kneading a raw material mixture containing a resin binder, a releasing agent, and a colorant; cooling the melt-kneaded mixture; and pulverizing the cooled mixture; and (II) further pulverizing a pulverized product obtained in the step (I) in the presence of an external additive containing at least two kinds of inorganic oxides subjected to hydrophobic treatment, having different average particle sizes from each other; and classifying the pulverized product, wherein the inorganic oxides subjected to hydrophobic treatment in the step (II) have an average particle size of 20 nm or less, and a difference in average particle size of 3 to 10 nm; and a process for preparing the toner. The toner of the present invention can be suitably used, for instance, for the development of a latent image formed in electrophotography, electrostatic recording method, electrostatic ...

Super low melt and ultra low melt toners containing crystalline sulfonated polyester

A toner is disclosed that includes a toner binder of crystalline sulfonated polyester, wherein the crystalline sulfonated polyester is 90% by weight or more of the toner binder, and a colorant. In other embodiments, the toner includes a crystalline sulfonated polyester and a linear amorphous sulfonated polyester, and a colorant. In these embodiments, the crystalline sulfonated polyester is from about 20% to about 60% by weight of the toner binder and the linear amorphous sulfonated polyester is from about 40% to about 80% by weight of the toner binder. The toners possess excellent miniumum fixing temperatures in the range of from about 80° C. to about 130° C. Processes for preparing the toners are also described.

Toner for developing electrostatic images and method for manufacturing thereof

A toner preparation process is disclosed. The process comprises a step of stirring the premixed colored resin particles and inorganic fine particles in the presence of mixing medium having a substantially spherical shape in the container, and a step of collecting toner particles comprised of the colored resin and inorganic particles thereon having a predetermined size by classifying at the stirring step. A continuous method for manufacturing a toner for an electrostatic imaging is provided. The resulting toner is low in electricity consumption, free from limitation on processing volume, and the method is capable of improving productivity and reducing manufacturing cost.

Toner for developing electrostatic image, apparatus unit and image forming method

An apparatus unit includes a detachably mounted unit having a developing sleeve, a toner and a toner applicator, all of which are enclosed by an outer casing. The toner has a shape factor SF-1 of 100-150 and is formed of 100 parts binder, 1-20 parts of a non-magnetic color and 5-40 parts wax and has a specific storage modulus ratio (a) at 60° C. and 80° C. and (b) at 155° C. and 190° C., of at least 80 for (a) and of 0.95-5 for (b). Toner images are visualized by forming an electrostatic image, developing the electrostatic image with the toner, transferring the toner image to a transfer material and fixing the toner image by heat and pressure.

Color toner and manufacturing method thereof and image forming method using the color toner

A color toner comprises a binder resin, a coloring agent, a release agent and a charge controlling agent, wherein the release agent dispersed in the binder resin has an average particle diameter of from about 0.1 to about 2 mum and wherein a fixed color toner image, which is developed and fixed using the toner, has a Haze factor less than about 20% when the image has an image density of 1.5. The color toner produces images having good image qualities such as good color reproducibility.

Process and apparatus for preparing toner particles

Disclosed is an apparatus for obtaining toner particles with improved dispersion of additive components therein comprised of a toner extrusion device containing therein a blending chamber, a screw mixing means, a heating means, a toner supply means, and a means for injecting the additive components into the extrusion device enabling a decrease in the melting temperature of the toner resin particles contained therein.

Binding resin for toner, toner and electrophotographic apparatus

In an electrophotographic apparatus, which forms a color image by transferring a plurality of toner images having different colors onto an image-receiving sheet so as to be stacked and fixed thereon, even in the case of carrying out an oil-less fixing process and allowing the process speed to vary within wide range, the present invention provides a binder resin, toner and an electrophotographic apparatus which make it possible to achieve both superior fixing property and anti-offset property, and consequently to form a color image with high color reproducibility and high quality. In the present invention, a toner comprising a molecular weight maximum peak in a range of molecular weights from 2x10³ to 3x10⁴ in molecular weight distribution of GPC chromatogram, and a molecular weight maximum peak or shoulder in a range from 3x10⁴ to 1x10⁶, wherein said molecular weight maximum peak or shoulder located on a range of molecular weights from 3x10 ^{Подробнее}

BINDER RESIN COMPOSITION FOR ELECTROSTATIC IMAGE DEVELOPING TONERS

The present invention relates to a binder resin composition for toners for development of electrostatic images capable of giving a toner excellent in fusing properties on PP films, a toner for development of electrostatic images containing the binder resin composition, a printing method using the toner, and a printed material. [1] A binder resin composition for toners for development of electrostatic images, including a polyester-based resin and polyolefin particles, wherein the polyolefin particles contain a polymer having a polymer skeleton of olefin having 2 or more and 3 or less carbon atoms, the volume median diameter (D50) of a small particle size component, as measured according to a dynamic light scattering method using a dispersion S of a small particle size component obtainable according to Methods 1 and 2, is 20 nm or more and 400 nm or less, the content of a large particle size component obtainable according to Method 2 is 0% by mass or more and 30% by mass or less relative ...

Toner

A toner includes toner particles. Each of the toner particles includes a composite core and a shell layer covering a surface of the composite core. Each of the composite cores is a composite of a toner core and foamable particles provided on a surface of the toner core. An amount of the foamable particles is at least 0.3% by mass relative to mass of the toner cores. Each of the foamable particles includes a base particle and a coat layer covering a surface of the base particle. The base particles are non-foamable. The coat layers include a foamable group. The foamable group is bonded to the surfaces of the base particles through a bond including a bond represented by formula “—O—Si—”.

TONER AND METHOD FOR PRODUCING THE SAME

To provide a method for producing a toner, containing a milling step containing finely milling particles and classifying coarse particles by using at least a mill and a cyclone unit, and a classifying step containing classifying pulverized particles by using at least a classifier and a cyclone unit, wherein any of the pulverized particles and other particles, which are classified by the classifier in the classifying step and returned, are returned to the cyclone unit in the milling step, and a toner produced by the method for producing the toner.

Toner, developer, image forming method, image forming apparatus and toner manufacturing method

A toner includes toner particles which have a binder resin and a colorant. The toner has a weight average particle diameter of from 4 to 7 mum and includes toner particles having a circle equivalent diameter of from 0.6 to 2.0 mum in an amount not greater than 5% by quantity, toner particles having a particle diameter of from 3.17 to 4.00 mum in an amount of from 10 to 40% by quantity, toner particles having a diameter of from 4.00 to 5.04 mum in an amount of from 20 to 40% by quantity, and toner particles having a diameter not less than 12.7 mum in an amount of from 0 to 1.0% by weight. The toner satisfies the following relationship: 1.04<=D4/D1<=1.30, wherein D4 represents the weight average particle diameter and D1 represents a number average particle diameter of the toner.

TONER CONTAINING CRYSTALLINE POLYESTER RESIN AND METHOD OF MANUFACTURING THE SAME

A toner includes a crystalline polyester resin in an amount equal to or greater than 25% by mass. The toner satisfies the following formula when the toner is tested using a capillary rheometry measurement during which a pellet of the toner is pressed by a member while being heated: 0.3≦(first temperature−second temperature)/(second temperature−third temperature)≦1, where the first temperature is a temperature at which the member falls 4 mm, the second temperature is a temperature at which the member falls 2 mm, and the third temperature is a temperature at which the member starts to fall. 1. A toner , comprising a plurality of aggregated particles including:a cross-linked crystalline polyester binder resin in an amount equal to or greater than 25% by mass with respect to the entire toner; anda colorant aggregated with the cross-linked crystalline polyester binder resin, wherein {'br': None, '0.3≦(first temperature−second temperature)/(second temperature−third temperature)≦1, where'}, 'the toner satisfies the following formula when the toner is tested using a capillary rheometry measurement during which a pellet of the toner is pressed by a member while being heatedthe first temperature is a temperature at which the member falls 4 mm,the second temperature is a temperature at which the member falls 2 mm, andthe third temperature is a temperature at which the member starts to fall.2. The toner according to claim 1 , wherein the first temperature is equal to or greater than 75° C. and equal to or smaller than 150° C.3. The toner according to claim 1 , wherein the second temperature is equal to or greater than 70° C. and equal to or smaller than 120° C.4. The toner according to claim 1 , wherein the third temperature is equal to or greater than 60° C. and equal to or smaller than 80° C.5. (canceled)6. The toner according to claim 1 , wherein the aggregated particles further include a non-crystalline polyester binder resin claim 1 , anda ratio of the cross-linked ...

METHOD FOR PRODUCING GROUND TONER

Toner of one aspect of the present invention has a weight average molecular weight Mw of 30,000≦Mw≦95,263 as determined from a molecular weight distribution based on GPC, includes a THF-insoluble gel component at a weight proportion of less than 5%, and includes components each having a molecular weight of 500 to 1500 which components have an area occupancy of 4% to 10% on a chart of the molecular weight distribution based on GPC.

Magnetic toner and image forming method using the same

Magnetic toner involves magnetic powder 1 having the particle shape of an octahedron 2 that is a convex polyhedron surrounded by eight triangles as a basis, each of the vertexes and edges of the octahedron being in a curved surface shape, and having a portion 3 that can be taken as a straight line on the outer periphery of its projected image. Therefore, the magnetic toner is superior in both two contradictory properties, that is the property of making it easy for a charging amount to quickly rise as well as improving the charging amount and the property of making it difficult for charge-up to occur, thereby making it possible to form a good image under a wide environment. In an image forming method, an electrostatic latent image is developed into a toner image by a magnetic one-component jumping developing method using the magnetic toner.

Toner for use in electrophotography, image formation method using the toner, method of producing the toner, and apparatus for producing the toner

A toner is proposed which includes toner particles and a fluidity-imparting agent and which has characteristics that when the toner is sieved with a 500-mesh sieve, the residue of the toner on the sieve has a circularity of from 0.93 to 0.97 and when 100 g of the toner is sieved with a 500-mesh sieve, the residue of the toner on the sieve has a weight not greater than 10 mg. The toner is for use in an electrophotographic image formation method using an intermediate image transfer method. A full-color image formation method, using this toner, and an image formation apparatus in which this toner is used are also proposed.

TONER AND METHOD FOR PRODUCING TONER

A toner contains a toner particle containing a resin component and a wax. The resin component contains a vinyl polymer A having a monomer unit A represented by the formula (A): In a luminance histogram created from STEM observation, the total pixel value C in luminance 0 to 9 and the total pixel value A in luminance 0 to 245 satisfy 0.000≤C/A≤0.250. When the pixel value in luminance 10 to 245 has a maximum value P at luminance X, luminance M-luminance N ranges from 120 to 235, wherein the luminance M denotes a luminance at which the pixel value falls below 20% of P for the first time from the luminance X to 245, and the luminance N denotes a luminance at which the pixel value falls below 20% of the P for the first time from the luminance X to 10.

Process for producing toner

COLOR TONER HAVING LOW CONTAMINATION OF CHARGING ELEMENTS

DEVELOPER AND ITS PRODUCTION

PROBLEM TO BE SOLVED: To obtain a mixture state where raw materials of a toner are uniformly dispersed with out causing aggregation of the raw materials. SOLUTION: By this production method, a first material which is used to constitute a developer and is electrified into specified polarity is mixed with a thermoplastic resin in a first mixing process). Then a second material to constitute the developer and is electrified to the opposite polarity to the polarity of the first material is mixed to the mixture obtd. in the first mixture process in a second mixing process). Then the mixture obtd. in the second mixing process is fused and kneaded (in a melting and kneading process). COPYRIGHT: (C)1997,JPO ...

TONER FOR NON-MAGNETIC ONE-COMPONENT DEVELOPMENT, ITS MANUFACTURING METHOD, DEVELOPER, AND IMAGE FORMING METHOD

PROBLEM TO BE SOLVED: To provide a toner for excellent non-magnetic one-component development without fixing separation, photoreceptor filming and fixing to a developing blade, and to provide a method for manufacturing the toner, a developer containing the toner, and an image forming method for forming images by using the toner or the developer. SOLUTION: The toner for the non-magnetic one-component development contains at least a binder resin, a wax and a coloring agent. The wax exists by being scattered into a plurality of pieces in the toner, ≥20 pieces% and <40 pieces% of the scattered wax have particle diameters of ≥2.0 μm and <3.0 μm, and the frequency value in frequency distribution of 0.1 μm width of the particles of the wax is ≥1.5 μm and <2.0 μm. When X is softening point of toner (Tm)(°C), Y is volume average particle diameter of toner (D50)(μm) and Z is total pts.wt number (phr) added to 100 pts.wt of toner, 45 Подробнее

TONER FOR ELECTROSTATIC LATENT IMAGE DEVELOPMENT, AND IMAGE FORMING METHOD AND DEVICE

PROBLEM TO BE SOLVED: To provide electrostatic latent image development toner which can meet the requirements for miniaturization of the image forming device and for less consumption without shortening its life and without causing paper jamming, and also is hard to form foggy grounds and excellent in many properties required for the toner forming images of high quality. SOLUTION: The image forming device 100 has an image forming unit 1, a recording material supply 2, an image fixing unit 3, and a controller 4. When forming an image by using this device 100, it uses electrostatic latent image development toner of the coloring resin particles. These particles have binder resin containing polyester resin poly alkylene, polyolefine dispersant, non-oxidizing polyethylene resin and inorganic pigments, and hydrophobic plasticizer particles adhering to their surfaces, and whose time constant τis 100-350 msec. COPYRIGHT: (C)2006,JPO&NCIPI ...

ТОНЕРНАЯ КОМПОЗИЦИЯ И СПОСОБ

Изобретение относится к тонерной композиции и к способу ее получения. Композиция содержит (a) первую аморфную сложную полиэфирную смолу, содержащую сложный полиэфир, полученный из додеценилянтарной кислоты, додеценилянтарного ангидрида или их комбинации, где первый аморфный сложный полиэфир получен посредством каталитической полимеризации мономеров органического диола, органической дикислоты и додеценилянтарной кислоты, додеценилянтарного ангидрида или их комбинации; (b) вторую аморфную сложную полиэфирную смолу, содержащую сложный полиэфир, полученный из додеценилянтарной кислоты, додеценилянтарного ангидрида или их комбинации и агента ветвления, полученного из компонента поликислоты или полиола, где второй аморфный сложный полиэфир получен посредством каталитической полимеризации мономеров органического диола, органической дикислоты, додеценилянтарной кислоты, додеценилянтарного ангидрида или их комбинации и агента ветвления; (c) кристаллическую сложную полиэфирную смолу; (d) воск и ( ...

ТОНЕР И СПОСОБ ИЗГОТОВЛЕНИЯ ТОНЕРА

ТОНЕРНЫЕ КОМПОЗИЦИИ И СПОСОБЫ

ТОНИРУЮЩИЕ СОСТАВЫ

... 1. Способ, включающий:смешение в расплаве аморфной смолы, необязательно кристаллической смолы, необязательно воска и необязательно красителя с получением тонера;гранулирование тонера с получением гранул тонера;обработку гранул тонера с получением частиц тонера;контактирование частиц тонера с деионизированной водой и по меньшей мере одним поверхностно-активным веществом с формированием смеси;коалесценцию частиц тонера путем нагревания смеси до температуры отприблизительно 50°С до приблизительно 100°С ивыделение частиц тонера из смеси,где частицы тонера имеют округлость приблизительно от 0,92 приблизительно до 0,999.2. Способ по п.1, где аморфная смола включает полученную из биологического сырья аморфную полиэфирную смолу, полученную по меньшей мере частично из материалов, выбранных из группы, состоящей из природных триглицеридных растительных масел, фенольных растительных масел и их комбинаций в количестве примерно от 1 процента от веса частиц тонера до примерно 95 процентов от веса частиц ...

Verfahren zur Herstellung von Toner

Ein Verfahren zur Herstellung eines Toners weist die folgenden Schritte auf: (I) Schmelzkneten einer Rohmaterialmischung, die ein Harzbindemittel und ein Färbemittel enthält; (II) Abkühlen der im Schritt (I) erhaltenen Schmelzknetmischung und Pulverisieren der abgekühlten Mischung, um ein pulverisiertes Produkt mit einer volumengemittelten Teilchengröße (D¶50¶v) von 10 bis 1000 mum zu ergeben; (III) Pulverisieren des im Schritt (II) erhaltenen pulverisierten Produkts in Gegenwart eines externen Additivs mit einer mittleren Teilchengröße von 8 bis 50 nm; und (IV) Klassieren des im Schritt (III) erhaltenen pulverisierten Produkts, wobei der resultierende Toner eine volumengemittelte Teilchengröße (D¶50¶v) von 3,5 bis 8 mum hat und die Gesamtmenge von m Arten externer Additive im Schritt (III) eine festgelegte Formel erfüllt. Der Toner kann z. B. zur Entwicklung eines latenten Bilds verwendet werden, das in der Elektrofotografie, einem elektrostatischen Aufzeichnungsverfahren, einem elektrostatischen ...

Herstellungsverfahren für Toner

TONER, TONER-HERSTELLUNGSVERFAHREN UND BILDERZEUGUNGSVERFAHREN

Herstellungsverfahren eines elektrophotographischen Toners

Kristalliner Polyester für einen Toner

Die vorliegende Erfindung betrifft einen kristallinen Polyester, erhältlich durch ein Verfahren, umfassend den Schritt des Polymerisierens der Ausgangsmaterialmonomere in der Gegenwart eines Wachses, wobei der kristalline Polyester ein Zahlenmittel des Molekulargewichts von 3000 bis 10000 und ein Gewichtsmittel des Molekulargewichts von 150000 bis 8000000 aufweist. Der den erfindungsgemäßen kristallinen Polyester enthaltende Toner kann zum Beispiel zum Entwickeln von in Elektrophotographie, elektrostatischem Aufzeichnungsverfahren, elektrostatischem Druckverfahren und dgl. gebildeten elektrostatischen Latentbildern verwendet werden.

Verfahren zur Herstellung von elektrostatischen Tonern

Eisen als Hauptkomponente enthaltende magnetische Tonerteilchen und Verfahren zu ihrer Herstellung

Verfahren zur Herstellung von Tonern

COLOR TONER WITH SMALL POLLUTION OF LOAD ELEMENTS

TONER MANUFACTURING PROCESS, AND TONER

TONER COMPOSITION AND PROCESS

A toner composition comprising (a) a first lower molecular weight amorphous polyester resin comprising a polyester derived from dodecenyl succinic acid, dodecenyl succinic anhydride, or a combination thereof present in an amount of from about 5 to about 15 weight percent, based on the total weight of the first amorphous polyester; (b) a second higher molecular weight amorphous polyester resin comprising a polyester derived from dodecenyl succinic acid, dodecenyl succinic anhydride, or a combination thereof, and a branching agent derived from a polyacid or polyol component; wherein the dodecenyl succinic acid, dodecenyl succinic anhydride, or combination thereof is present in the second amorphous polyester in an amount of from about 5 to about 15 weight percent, based on the total weight of the second amorphous polyester; (c) a crystalline polyester resin; (d) a wax; and (e) optionally, a colorant.

ELECTROPHOTOGRAPHIC TONER COMPRISING A HIGH-MELTING WAX, A PRINTING SYSTEM FOR APPLYING SAID TONER ON AN IMAGE RECEIVING MEDIUM AND A METHOD FOR PREPARING SAID TONER

The invention relates to a toner for developing a toner image, the toner comprising a binder resin, an inorganic component and a wax. The wax is finely dispersed within the toner and has a melting transition, wherein the lower temperature limit of the melting transition is between 110 ºC and 140 ºC at the time of temperature rise in the DSC curve measured using a differential scanning calorimeter. The invention further relates to a printing system for applying the toner according to the present invention on an image receiving medium. The invention further relates to a method for preparing the toner according to the present invention.

SUPER LOW MELT TONER HAVING CRYSTALLINE IMIDES

A toner includes a polymeric resin, optionally a colorant, and a small molecule crystalline imide having a molecular weight less than 1,000 g/mol. The polymeric resin may be an amorphous resin and a mixture of the amorphous resin and the crystalline imide may be characterized by a reduction in glass transition temperature from that of the resin and by the lack of a melting point for the crystalline imide as determined by differential scanning calorimetry, the enthalpy of fusion for the crystalline imide in the mixture being measured to be less than 10% of the enthalpy of fusion of the crystalline imide in pure form. Furthermore, the toner may be configured to have a crease fix minimum fusing temperature (MFT) less than or equal to the crease fix MFT of a benchmark ultra-low-melt emulsion aggregation toner. Suitable crystalline imides may include N-alkyl and N-aryl imides, such as N-benzylphthalimide.

TONER FOR DEVELOPING ELECTROSTATIC IMAGE, APPARATUS UNIT AND IMAGE FORMING METHOD

A toner for developing an electrostatic image includes: 100 wt. parts of a binder resin, 1 - 150 wt. parts of a colorant and a relatively large amount of 5 - 40 wt. parts of a low-softening point substance. The toner is further characterized by viscoelastic properties including: a storage modulus at 60.degree.C (G'60) and a storage modulus at 80.degree.C (G'80) providing a ratio (G' 60/G' 80) of at least 80, and a storage modulus at 155.degree.C (G'155) and a storage modulus at 190 .degree.C (G'190) providing a ratio (G'155/G'190)of 0.95 - 5. As a result, the toner shows good low-temperature fixability and anti-offset characteristic, and also little temperature-dependence of gloss.

METHOD FOR MANUFACTURING SPHERICAL PARTICLES

A method for producing spherical particles including the steps of: melting together a first material and a second material which are incompatible; applying shear to the melted mixture to create an emulsion of the first material and second materials whereby finely divided spherical blobs of the first material are dispersed in the other material; cooling the dispersion to solidify at least the first material; and removing the second material from the cooled dispersion to yield spherical particles of the first material, preferably by dissolving the second material in a solvent in which the first material is not soluble.

Polyester resin for toner, toner, and electrostatic charge image developer

Toner

Toner and method of manufacturing the same, two-component developer, developing device and image forming apparatus

The invention provides a toner and a method of manufacturing the same, a two-component developer, a developing device and an image forming apparatus. The toner containing a lignin resin, a carbon-neutral biomass polymer having a low environmental load and taking global environmental protection into account, as a constitutional component of a binder resin, and having a wide fixing non-offset rangeand an excellent fixing property, is provided. The toner contains at least a binder resin, a colorant, and a release agent. Furthermore, in the toner, the binder resin includes a resin A that is a lignin resin and a resin B that is another resin component, and the resin B has a peak top molecular weight of 103 to 104 and an acid number of 20 or less.

Toner and for its Image forming method, Image forming apparatus and process cartridge

Toner, developer, Image forming apparatus, particles, toner manufacturing method and particle manufacturing method

The powder particles of the heat treatment equipment and method for producing toner

Toner production of no agglomeration

Resin Particle

TRANSPARENT TONER, DEVELOPER INCLUDING SAME, GLOSS-PROVIDING UNIT AND IMAGE FORMING DEVICE

TONER FOR ELECTROPHOTOGRAPHY AND BINDER RESIN FOR TONER

Toner

TONER AND IMAGE-FORMING METHOD

Disclosed is a toner which comprises at least a toner particle comprising at least a binding resin, a mold release agent and a coloring agent and an inorganic micropowder. The toner shows a degree of aggregation (Y1) determined under compression (200 kPa) and a degree of aggregation (Y2) determined under uncompressed conditions falling within the following ranges: 15<=Y1<=35 and 7<=Y2<=15, and has the maximum endothermic peak falling within the range from 30 to 200°C in an exothermic curve determined on a differential scanning calorimeter, wherein the peak temperature (Tsc) (°C) of the maximum exothermic peak falls within the following range: 60<=Tsc<=130. © KIPO & WIPO 2008 ...

TONER PROCESS INCLUDING SYNTHESIS OF AMPHIPHILIC BLOCK COPOLYMER THROUGH EMULSION POLYMERIZATION

The present invention relates to a toner process including synthesis of an amphiphilic block copolymer through emulsion polymerization, capable of remarkably reducing material costs. According to the present invention, the toner process including synthesis of an amphiphilic block copolymer through emulsion polymerization comprises: a step (a) of providing at least one kind of amphiphilic block copolymer manufactured by non-surfactant emulsion polymerization, which includes a step of dissolving a hydrophilic monomer in water, a step of adding a hydrophobic monomer, a step of adding a supply initiator to generate a colloidal dispersion of the amphiphilic block copolymer, and a step of optionally discharging the amphiphilic block copolymer; a step (b) of allowing one or more kinds of a latex polymer, wax, and a colorant to come in contact with the colloidal dispersion of the amphiphilic block copolymer to form a mixture or a step of allowing the discharged colloidal dispersion of the amphiphilic ...

Charge controlling agent and toner

Provided is a charge controlling agent which contains at least one kind of a compound represented by the general formula (1) as active ingredient, at least 50 mol% of above mentioned compound being a cone conformer or a partial cone conformer. In the formula, R1 to R4 may be identical or different from one another and represent a substituted or unsubstituted, linear or branched, alkyl group or similar, with a number of carbon atoms between 1 and 20; R5 to R8 may be identical or different from one another and represent a substituted or unsubstituted, linear or branched, alkyl group or similar, with a number of carbon atoms between 1 and 20; X1 to X4 may be identical or different from one another and represent a sulfur atom or similar.

AQUEOUS DISPERSIONS FOR USE AS TONERS

A compound that includes an aqueous dispersion, wherein the dispersion includes a thermoplastic resin and at least one stabilizing agent,' and at least one selected from the group consisting of a colorant and a magnetic pigment, wherein the dispersion has an average volume diameter particle size from about 0.05 to about 10 microns is described.

METHOD FOR MANUFACTURING SPHERICAL PARTICLES

A method for producing spherical particles including the steps of: melting together a first material and a second material which are incompatible; applying shear to the melted mixture to create an emulsion of the first material and second materials whereby finely divided spherical blobs of the first material are dispersed in the other material; cooling the dispersion to solidify at least the first material; and removing the second material from the cooled dispersion to yield spherical particles of the first material, preferably by dissolving the second material in a solvent in which the first material is not soluble.

Toner processes with surface additives

A process for the preparation of colored toners which comprises mixing a first toner comprised of resin, pigment particles, charge additive, and surface additives, with a second toner comprised of resin, pigment particles, and charge additive, and wherein the resulting colored toners contain from about 0.05 to about 0.5 weight percent of surface additives.

DEVELOPER, METHOD FOR FORMING IMAGE, AND METHOD FOR PRODUCING DEVELOPER

A developer of the present disclosure contains: toner particles each containing a binder resin and a magnetic powder; cross-linked polyester resin particles having a particle size of 2 m or more and 30 m or less; and an external additive. The toner particles and the cross-linked polyester resin particles are externally treated with the external additive in the same manner.

DEVELOPING AGENT AND METHOD FOR MANUFACTURING THE SAME

A method for manufacturing a developing agent by mixing a resin having a dissociable functional group and an aqueous medium, subjecting the mixture to mechanical shearing, finely pulverizing the pulverized mixture to form resin microparticles, adding a dispersion of colorant particles, causing the resin microparticles and colorant particles to agglomerate, and forming toner particles.

Toner containing crystalline polyester resin and method of manufacturing the same

A toner includes a crystalline polyester resin in an amount equal to or greater than 25% by mass. The toner satisfies the following formula when the toner is tested using a capillary rheometry measurement during which a pellet of the toner is pressed by a member while being heated: 0.3≦(first temperature−second temperature)/(second temperature−third temperature)≦1, where the first temperature is a temperature at which the member falls 4 mm, the second temperature is a temperature at which the member falls 2 mm, and the third temperature is a temperature at which the member starts to fall.

POLYMERIC COMPOSITE MATERIALS, MANUFACTURE, AND USES

Composite materials such as composite particles have a solid non-elastomeric continuous phase made of an organic polymer having a glass transition temperature of at least 25° C. Dispersed within this solid non-elastomeric continuous phase are many multi-compartment porous chemically crosslinked elastomeric particles that have a mode particle size of at least 1 m and up to and including 10 m. The composite particles can be used as toner particles in electrophotographic imaging methods to provide fused toner images and especially stacked fused toner images.

Method of producing an electrostatic charge image developing toner

A pulverized starting material is supplied quantitatively from a quantitative feeder 1 to a first mechanical pulverizer 2 where the material is pulverized moderately, the resulting moderately pulverized material is supplied quantitatively from a quantitative feeder 3 to a second mechanical pulverizer 4 where the material is finely pulverized, and the resulting finely pulverized material is introduced into a coarse-powder classifier 5 to classify coarse powder not smaller than a predetermined particle diameter. The finely pulverized material from which the coarse powder was removed by classification is further classified fine powder not larger than a predetermined size by a fine-powder classifier 7 to produce a classified product, while the separated classified coarse powder is introduced into a returning-powder feeder 6 . The classified coarse powder introduced into the returning-powder feeder 6 is again supplied quantitatively to the second mechanical pulverizer 4 , upon which when it ...

Process for preparing toner

A process for preparing a toner including the steps of (I) melt-kneading a raw material mixture containing a resin binder, a wax, and a colorant with an open-roller type kneader; (II) cooling the melt-kneaded mixture obtained in the step (I) and pulverizing the cooled mixture; and (III) classifying the pulverized product obtained in the step (II) to give a toner, wherein the wax is contained in the toner in an amount of from 2 to 15% by weight, and has a number-average particle size in the toner of 1 mum or less, wherein the toner has a volume-median particle size (D₅₀) of from 3.5 to 7 mum, and a standard deviation in volume base particle size distribution of ¼ of D₅₀ or less, and contains 5% by volume or less of particles having particle sizes of (1.4xD₅₀) mum or more, and 5% by number or less of particles having particle sizes of 3 mum or less. The toner can be used, for instance, for the development of a latent image formed in electrophotography, electrostatic ...

Apparatus for heat-treating toner and method for producing toner

An apparatus for heat-treating a toner includes a raw-material supply unit configured to supply a toner treatment space with a raw-material toner, a hot-air supply unit configured to heat-treat the raw-material toner in the toner treatment space, a suction and ejection unit configured to eject hot air used for the heat treatment of the raw-material toner, and a waste-heat recovery and supply unit configured to recover heat from the hot air ejected by the suction and ejection unit and supply the hot-air supply unit with the recovered heat.

Toner, developer, image forming method and image forming apparatus

A toner containing toner particles, each toner particle containing: a releasing agent; a colorant; and a binder resin containing at least a crystalline polyester resin and a non-crystalline polyester resin, wherein in the case where a volume average particle diameter of the toner is defined as Dv, the toner contains a group of the toner particles having 4/5Dv, and a group of the toner particles having 6/5Dv, and wherein an endothermic value A of the crystalline polyester resin at a first temperature increase in DSC of the toner, an endothermic value B of the crystalline polyester resin at a first temperature increase in DSC of the group of the toner particle having 4/5Dv, and an endothermic value C of the crystalline polyester resin at a first temperature increase in DSC of the group of the toner particles having 6/5Dv satisfy the relation represented by the following formulas: 50<( B/A )×100<90, and 110<( C/A )×100<150.

Toner

A toner containing toner particles, each of which contains a binder resin and a colorant, and silica particles, wherein the silica particles have a volume average particle diameter (Dv) of 70 nm or more and 500 nm or less, the variation coefficient of diameters of the silica particles, based on volume distribution thereof, is 23% or less, and wherein when the silica particles are heated from 105° C. to 200° C., the ratio of mass decrease is 0.60% or less.

Non-magnetic single component emulsion/aggregation toner composition

A toner composition with a novel surface additive package for developing images. The additive package includes sol-gel silica, a PDMS silica, an organic spacer such as PMMA and HMDS silica. The toner composition exhibits improved control of voltage, higher print density, lower toner amount remaining on the roll, lower toner usage, and reduced drum contamination. The toner composition also exhibits improved dry theological properties. These improved properties make this toner composition useful for higher speed printing while using less toner.

Toner

A toner prepared by a method comprising granulating while polymerizing a ring-opening polymerizable monomer with a catalyst under the presence of a surfactant and a colorant in a compressible fluid.

Toner for developing electrostatic charge image, and apparatus and method for forming image using the same

Disclosed is a toner for developing an electrostatic charge image, including a toner particle coated with a combination of sol-gel silica particles, hydrophobically surface-treated fumed silica particles, and hydrophobically surface-treated titanium dioxide particles.

Carbon based black toners prepared via limited coalescence process

A black toner composition comprising toner particles prepared by a chemical process of manufacture comprising carbon black pigment, a first addition polymer comprising carboxylic acid groups along the polymer backbone, and a thermoplastic second polymer binder distinct from the first polymer, wherein the first polymer has an Acid Value of from 30 to 220 and is present at a weight ratio of greater than 1:2 relative to the amount of carbon, and at a relatively lower weight percent than the second polymer. A process for preparation of such toner particles comprising: preparing a masterbatch comprising a carbon black and a first addition polymer comprising carboxylic acid groups along the polymer backbone and having an Acid Value of from 30 to 220, where the first polymer is present at a weight ratio of greater than 1:2 relative to the amount of carbon; dissolving a thermoplastic second polymer binder in an organic solvent; adding the masterbatch to the solution of second polymer binder to form an organic phase, wherein the first polymer is present at a lower weight percent than the second polymer; dispersing the organic phase in an aqueous phase comprising a particulate stabilizer to form a dispersion; and removing the solvent from the organic phase to form toner particles comprising the first polymer, the second polymer binder and carbon black.

Developer, image formation unit, and image formation apparatus

A developer includes particles of developer base material containing a binder resin and external additive added to surfaces of the particles of developer base material. A loose bulk density is not smaller than 0.300 g/ml but not larger than 0.420 g/ml, and a release rate of the external additive from the particles of developer base material is not lower than 5% but not higher than 15%.

Toner, method for producing the same, cartridge storing the same, process cartridge, and image forming apparatus

According to one embodiment, a toner includes at least one encapsulated particle containing a color developable compound, color developer and a color eraser and polymeric particles. The at least one encapsulated particle and the polymeric particles being aggregated and fused in dispersion liquid.

Aqueous dispersions for use as toners

A compound that includes an aqueous dispersion, wherein the dispersion includes a thermoplastic resin and at least one stabilizing agent, and at least one selected from the group consisting of a colorant and a magnetic pigment, wherein the dispersion has an average volume diameter particle size from about 0.05 to about 10 microns is described.

Transparent electrostatic charge image developing toner, electrostatic charge image developer, toner cartridge, process cartridge, image forming apparatus, and image forming method

A transparent electrostatic charge image developing toner satisfies the relationships of the following Formulas (1), (2), and (3) wherein Dt (μm) is a volume average particle diameter, upper GSDv is an upper volume particle size distribution index, and lower GSDp is a lower number particle size distribution index: Formula (1): 18≦Dt≦30; Formula (2): 1.05≦upper GSDv≦1.20; and Formula (3): 1.29≦lower GSDp≦1.50.

Carboxylic acid or acid salt functionalized polyester polymers

The present disclosure describes a polyester that contains plural pendant adjacent carboxylic acid or acid salt side groups for use in making a toner for use in imaging devices.

TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT

A method for producing a toner for electrostatic image development containing at least a resin binder and a charge control agent, including step 1: melt-kneading components containing a resin binder and a charge control agent to provide a melt-kneaded product; and step 2: pulverizing the melt-kneaded product, and classifying a pulverized product, wherein the resin binder contains a polyester A obtained by polycondensing an alcohol component containing 1,2-propanediol and a carboxylic acid component containing a rosin compound and an aliphatic dicarboxylic acid compound having 6 to 10 carbon atoms, wherein 1,2-propanediol is contained in the alcohol component of the polyester A in an amount of 85% by mol or more. The toner for electrostatic image development obtained by the method of the present invention can be suitably used in, for example, the development or the like of latent image formed in electrophotography, an electrostatic recording method, an electrostatic printing method, or the like. 1. A method for producing a toner for electrostatic image development comprising at least a resin binder and a charge control agent , comprising:step 1: melt-kneading components containing a resin binder and a charge control agent to provide a melt-kneaded product; andstep 2: pulverizing the melt-kneaded product, and classifying a pulverized product,wherein the resin binder comprises a polyester A obtained by polycondensing an alcohol component comprising 1,2-propanediol and a carboxylic acid component comprising a rosin compound and an aliphatic dicarboxylic acid compound having 6 to 10 carbon atoms, wherein 1,2-propanediol is contained in the alcohol component of the polyester A in an amount of 85% by mol or more.2. The method for producing a toner for electrostatic image development according to claim 1 , wherein the resin binder comprises a polyester H having a softening point of from 125° to 155° C. claim 1 , and a polyester L having a softening point of from 90° to 125° ...

Toner, method for producing the toner, and image forming method

A toner including a binder resin containing an ester bond, and a releasing agent, wherein the releasing agent includes first C30-C50 alkyl monoester compound and second C30-C50 alkyl monoester compound, wherein the number of carbon atoms of the first C30-C50 alkyl monoester compound is different from that of the second C30-C50 alkyl monoester compound, wherein the amount of the first C30-C50 alkyl monoester compound is largest and the amount of the second C30-C50 alkyl monoester compound is second largest or same as the amount of the first C3OC50 alkyl monoester compound, wherein the amount of the first C30-C50 alkyl monoester compound is 30% by mass or more but less than 50% by mass to the releasing agent, and wherein the amount of the second C30-C50 alkyl monoester compound is 10% by mass or more but less than 50% by mass to the releasing agent.

Developing apparatus and developing method

An object of the present invention is to provide a developing apparatus which is less affected by usage environments, has high development efficiency for long term use and can provide a high quality image without image density non-uniformity. The present invention relates to a developing apparatus wherein a magnetic toner-carrying member has a work function value at the surface thereof within a specific range, a toner regulating member which regulates toner carried on the magnetic toner-carrying member is made of a specific material at a portion contacting the magnetic toner, the magnetic toner has an average circularity of 0.950 or more and the magnetic toner has a surface tension index within a specific range.

TONER FOR DEVELOPING ELECTROSTATIC IMAGES AND DEVELOPER

To provide a toner containing: a binder resin containing a non-crystalline polyester resin and a crystalline polyester resin; a colorant; and wax, wherein the toner satisfies the following formula 1, and has loss tangent of 1 or smaller at 80° C. or higher, B−A<20 Formula 1 where A represents a melting point of the crystalline polyester resin and B represents a temperature at which the toner has storage modulus G′ of 20,000 Pa. 1. A toner comprising:a binder resin comprising a non-crystalline polyester resin and a crystalline polyester resin;a colorant; anda wax, {'br': None, 'i': 'B−A<', '20\u2003\u2003Formula 1'}, 'wherein the toner satisfies Formula 1, and has a loss tangent of 1 or smaller at 80° C. or higher,'}wherein A represents a melting point of the crystalline polyester resin and B represents a temperature at which the toner has storage modulus G′ of 20,000 Pa.2. The toner according to claim 1 , wherein the crystalline polyester resin is of an amount of 1 part by mass to 15 parts by mass relative to 100 parts by mass of the binder resin.3. The toner according to claim 1 , wherein the toner is obtained by a method comprising:dispersing, in an aqueous medium, an oil phase in which an organic solvent comprises the binder resin comprising the crystalline polyester resin and the non-crystalline polyester resin thereby preparing an O/W dispersion liquid; andremoving the organic solvent from the O/W dispersion liquid.4. The toner according to claim 3 , wherein the toner is obtained by the method comprising:dispersing, in the aqueous medium comprising a dispersant, the oil phase in which at least the colorant, the wax, the crystalline polyester resin, a compound comprising an active hydrogen group, and a binder resin precursor comprising a site reactive with the compound comprising an active hydrogen group are dissolved or dispersed in the organic solvent, thereby preparing an emulsified dispersion liquid;allowing the binder resin precursor and the compound ...

Electrophotographic toner and method for producing the same

A decolorizable electrophotographic toner, including: toner particles, the toner particle comprising a binder resin; and colorant particles which contain an electron donating color developable agent, an electron accepting color developing agent, and a decolorizing temperature control agent, and have a capsule structure coated with an outer shell, wherein the ratio of an total exposed areas of the colorant particles to the total projected areas of the toner particles calculated on the basis of scanning electron microscope (SEM) observation of the toner is 5.0% or less.

METHOD FOR PRODUCING AQUEOUS DISPERSION OF RESIN FINE PARTICLES AND METHOD FOR PRODUCING TONER

The present invention provides a method for producing an aqueous dispersion of resin fine particles wherein the particle size of the obtained resin particles is small and the aqueous dispersion is excellent in productivity, the production method including: mixing a resin having an acid group, a betaine surfactant and a solvent capable of dissolving the resin having an acid group to obtain a mixture; and emulsifying the mixture by placing the mixture in an aqueous medium and by applying shear force to the mixture under a condition of pH=7.0 or more to obtain an emulsion. 1. A method for producing an aqueous dispersion of resin fine particles , comprising the steps of:(A-1) preparing a mixture A by mixing a resin having an acid group, a betaine surfactant and a solvent capable of dissolving the resin; and(A-2) preparing an emulsion A by adding the mixture A into an aqueous medium, and applying shear force to the mixture A in the aqueous medium under a condition of pH=7.0 or more.2. The method for producing an aqueous dispersion of resin fine particles according to claim 1 , wherein the betaine surfactant comprises a carboxylate group.3. The method for producing an aqueous dispersion of resin fine particles according to claim 1 , wherein the betaine surfactant is an amide betaine.4. A method for producing an aqueous dispersion of resin fine particles claim 1 , comprising:(B-1) preparing a mixture B by mixing a resin having an acid group, a betaine surfactant and an aqueous medium; and(B-2) preparing an emulsion B by applying shear force to the resin in the mixture B under a condition of pH=7.0 or more and at a temperature equal to or higher than the glass transition temperature (Tg) of the resin.5. The method for producing an aqueous dispersion of resin fine particles according to claim 4 , wherein the betaine surfactant comprises a carboxylate group.6. The method for producing an aqueous dispersion of resin fine particles according to claim 4 , wherein the betaine ...

Silicon dioxide powder having special surface properties and toner composition containing said powder

The invention relates to silicon dioxide powder which is present in the form of aggregated primary particles having an average diameter of at least 40 nm and a ratio of the BET surface area to the STSA surface area of at least 3.5. The invention also relates to a toner composition containing said silicon dioxide powder.

Toner, developer, and image forming apparatus

A toner contains a binder resin, a colorant, and a releasing agent, wherein the toner contains toner particles, and wherein a proportion of the toner particles containing one or more voids having diameters D 1 of larger than 0.0 μm but 0.5 μm or smaller is more than 5.0% to 60%, and a proportion of the toner particles containing one or more voids having diameters D 2 of 1.0 μm or larger is 10% or less.

Transparent electrostatic charge image developing toner and method of manufacturing the same, electrostatic charge image developer, toner cartridge, image forming method, and image forming apparatus

A transparent electrostatic charge image developing toner contains a binder resin, europium, and bismuth.

Super low melt toner with core-shell toner particles

A toner particle having a core and a shell, and a method for making the toner particle. The core includes a crystalline resin and the shell includes an amorphous resin. The shell is substantially to completely free of the crystalline resin. The toner particle permits inclusion of greater amounts of crystalline resin materials in the core, thereby lowering the minimum fusing temperature of the toner formed from the particles.

TONER, BINARY DEVELOPER, AND IMAGE FORMING METHOD

It is an object of the present invention to provide a toner having the transfer efficiency and the cleanability in combination, exhibiting excellent stress resistance, and ensuring the low-temperature fixing. 1wherein the toner has a weight average particle diameter (D4) of 3.0 μm or more, and 8.0 μm or less and satisfies the following conditions (a) and (b) in the measurement with a flow particle image analyzer with an image processing resolution of 512×512 pixels.(a) Regarding particles having a circle equivalent diameter of 1.98 μm or more, and 200.00 μm or less, the average circularity of the toner is 0.960 or more, and 0.985 or less and particles having a circularity of 0.990 or more, and 1.000 or less constitute 25.0 percent by the number or less.(b) Particles having a circle equivalent diameter of 0.50 μm or more, and 1.98 μm or less constitute 10.0 percent by the number or less of particles having a circle equivalent diameter of 0.50 μm or more, and 200.00 μm or less.. A toner characterized by comprising toner particles containing at least a binder resin and a wax, This application is a Continuation of U.S. patent application Ser. No. 12/965,677 filed Dec. 10, 2010, which claims priority to International Application No. PCT/JP2009/070855 filed Dec. 14, 2009, each of which are hereby incorporated by reference herein in their entireties.The present invention relates to a toner used for an electrophotographic system, an electrostatic recording system, an electrostatic printing system, and a toner jet system, a binary developer including the toner, and an image forming method by using the toner.Regarding an electrophotographic apparatus, in order to obtain good image characteristics over the long term, a toner has been required to have the transferability and the cleanability in combination. Consequently, control of the distribution state of toner particles having a specific shape has been performed previously.In PTL 1, it is intended to ensure the compatibility ...

TONER SET, DEVELOPER SET, AND IMAGE FORMING APPARATUS

A toner set, including: a transparent toner including a binder resin a, a releasing agent a and no colorant; and one or more color toners, each including a binder resin b, a colorant b and a releasing agent b, wherein the binder resin a includes a non-crystalline resin α and a crystalline resin α, the binder resin b includes a non-crystalline resin β and a crystalline resin β, the releasing agent a has an average particle diameter as a long diameter of 0.2 μm to 2.0 μm, and there is a relationship of 1 Подробнее

Toner and Method for Producing the Same

There is provided a toner, including toner mother particles which contain a binder resin, a colorant, and a wax, wherein a difference between a density of the wax in a solid state and a density of the wax in a liquid state is not less than 0.11 g/cm 3 ; the density of the wax in the liquid state is not more than 0.835 g/cm 3 ; and a heat quantity of the wax per unit mass which is obtained from an endothermic peak area at a low temperature side measured by a differential scanning calorimetry is not less than 190 mJ/mg.

TONER FOR ELECTROSTATIC LATENT IMAGE DEVELOPMENT

A toner containing a binder resin, a release agent, and pigment fine particles is produced by aggregating fine particles containing the components of the toner to obtain fine particle aggregates and then coalescing the fine particle aggregates. The pigment fine particles have an average primary particle diameter of 50 nm or less, a Cv value of less than 20%, and an average circularity of 0.900 or more. 1. A toner for electrostatic latent image development , comprising a binder resin , pigment fine particles , and a release agent ,wherein the toner is prepared by aggregating fine particles containing the components of the toner for electrostatic latent image development to thereby obtain fine particle aggregates and then coalescing the fine particle aggregates, andthe pigment fine particles have an average primary particle diameter of 50 nm or less, a Cv value of less than 20%, and an average circularity of 0.900 or more.2. The toner for electrostatic latent image development according to claim 1 , wherein the pigment fine particles are prepared by mixing a first pigment raw liquid and a second pigment raw liquid to thereby deposit a pigment claim 1 , by use of a microreactor that is equipped with two circular disks of a fixed disk A and a rotatable disk B placed such that a thin layer is formed between circular surfaces of the two disks;a first raw liquid supply portion that supplies the first pigment raw liquid from a thin layer end to the thin layer; andat least one second raw liquid supply portion that is formed through an upper surface and a lower surface of the fixed disk, that is positioned opposite to the first raw liquid supply portion with respect to the center of the circular surface of the fixed disk, and that supplies the second pigment raw liquid from the upper side of the fixed disk.3. The toner for electrostatic latent image development according to claim 2 , wherein the thickness of the thin layer between the circular surfaces is from 1 μm to 100 μm. ...

Method of producing toner

The present invention provides a toner excellent in low-temperature fixability and also excellent in heat-resistant storage property, offset resistance, and durability. In a process for producing a toner containing toner particles by emulsion aggregation, each toner particle includes a binder resin of which a main component is a block polymer having a crystal structure, a colorant, and a release agent; the binder resin includes polyester as a main component; the rate of a portion capable of forming a crystal structure to the binder resin is 50 to 80 mass %; a peak temperature Tp of a maximum endothermic peak attributed to the binder resin is 50 to 80° C. in endothermic amount measurement of the toner with a differential scanning calorimeter (DSC); and fused particles are heated at a heating temperature t (° C.) satisfying Tp′−15.0≦t≦Tp′−5.0 for at least 0.5 hr.

ELECTROPHOTOGRAPHIC TONER COMPRISING A HIGH-MELTING WAX, A PRINTING SYSTEM FOR APPLYING SAID TONER ON AN IMAGE RECEIVING MEDIUM AND A METHOD FOR PREPARING SAID TONER

The invention relates to a toner for developing a toner image, the toner comprising a binder resin, an inorganic component and a wax. The wax is finely dispersed within the toner and has a melting transition, wherein the lower temperature limit of the melting transition is between 110° C. and 140° C. at the time of temperature rise in the DSC curve measured using a differential scanning calorimeter. 1. A toner for developing a toner image , the toner comprising:(i) a binder resin;(ii) an inorganic component, preferably a magnetic component; and(iii) a wax, the wax being an oxidized polyalkylene wax, the wax being finely dispersed in the binder resin, said wax having a wax melting transition, wherein the lower temperature limit of said wax melting transition is between 110° C. and 140° C. at a time of temperature rise in a DSC thermogram measured using a differential scanning calorimeter.2. The toner according to claim 1 , wherein said wax melting transition has an upper temperature limit of at most 140° C. at the time of temperature rise in the DSC thermogram measured using a differential scanning calorimeter.3. The toner according to any of the previous claims claim 1 , wherein the viscosity of the wax is in the range 1 Pa·s to 10 Pa·s at 140° C.4. The toner according to any of the previous claims claim 1 , wherein the wax is a oxidized polyethylene wax having a melting peak in a temperature range of 120° C. to 135° C. at the time of temperature rise in the DSC thermogram measured using a differential scanning calorimeter claim 1 , said wax having a polydispersity D of less than about 3.5.5. The toner according to any of the previous claims claim 1 , wherein the wax has an acid value from 5 mg KOH/g to 50 mg KOH/g.6. The toner according to any of the previous claims claim 1 , wherein the binder resin has an acid value from 5 mg KOH/g to 30 mg KOH/g.7. The toner according to any of the previous claims claim 1 , wherein a dispersion of the wax in the binder resin has ...

Enhancing color toner images with fluorescing magenta toners

A composite color toner image can be enhanced by applying a separate fluorescing toner image over it to provide an enhanced color toner image having a “pinkish” fluorescing effect. This separate fluorescing toner image is obtained using visible fluorescing dry magenta toner particles. Each of these toner particles consists essentially of a polymeric binder phase and a visible fluorescing colorant that emits at one or more peak wavelengths of at least 510 nm and up to and including 590 nm and that is dispersed within the polymeric binder phase.

Preparing toner images with metallic effect

A method is used to provide a toner image with a metallic effect. After forming a latent image, it is developed with metallic dry toner particles to form a developed toner image that is transferred and fixed to a receiver material. Each metallic dry toner particle consists essentially of a polymeric binder phase and non-conductive metal oxide particles. Before fixing, the metallic dry toner particle has a mean volume weighted diameter (D vol ) of at least 15 μm and up to and including 40 μm. The non-conductive metal oxide particles are present in an amount of 20-50 weight %. The ratio of the metallic dry toner particle D vol to the average equivalent circular diameter (ECD) of the non-conductive metal oxide particles in the metallic dry toner particles, before fixing, is greater than 0.1 and up to and including 10.

Image-forming apparatus and cartridge

An image-forming apparatus including an electrophotographic photoreceptor of which photosensitive layer contains oxytitanium phthalocyanine showing main diffraction peaks at Bragg angles (2θ) of 9.0° and 27.2° and at least one main diffraction peak in the range of 9.3° to 9.8° to CuKα rays, and the toner satisfies all the following requirements (1) to (3): (1) the volume median diameter (Dv50) is 4.0 μm or more and 7.0 μm or less, (2) the average sphericity is 0.93 or more, and (3) the relation between the volume median diameter (Dv50) and the content (% by number: Dns) of toner particles of 2.00 μm or more and 3.56 μm or less satisfies Dns≦0.233EXP(17.3/Dv50).

BRILLIANT TONER, DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS

A brilliant toner includes toner particles which at least contain a brilliant pigment, a binder resin, and a release agent; and an external additive, wherein a ratio (X/Y) of a specific surface area X (m/g), calculated from a projected image of the toner particles, to a BET specific surface area Y (m/g) of the toner particles is from 0.3 to 1.0. 1. A brilliant toner comprising:toner particles which at least contain a brilliant pigment, a binder resin, and a release agent; andan external additive,{'sup': 2', '2, 'wherein a ratio (X/Y) of a specific surface area X (m/g), calculated from a projected image of the toner particles, to a BET specific surface area Y (m/g) of the toner particles is from 0.3 to 1.0.'}2. The brilliant toner according to claim 1 ,wherein, when a cross section of a toner particle in a thickness direction thereof is observed, the number of pigment particles arranged so that an angle formed by a long axis direction of the toner particle in the cross section and a long axis direction of a pigment particle is in the range of −30° to +30° is greater than or equal to 60% with respect to the total number of pigment particles observed.3. The brilliant toner according to claim 1 ,wherein, when a solid image formed by the toner is irradiated with incident light at an incident angle of −45° using a goniophotometer, a ratio (A/B) of a reflectance A at a light-receiving angle of +30° to a reflectance B at a light-receiving angle of −30° is from 2 to 100.4. The brilliant toner according to claim 1 ,wherein a ratio (C/D) of an average maximum thickness C to an average equivalent-circle diameter D is in the range of from 0.001 to 0.500.5. The brilliant toner according to claim 1 ,wherein the brilliant pigment contains aluminum.6. The brilliant toner according to claim 1 ,wherein a content of the brilliant pigment is from 1 part by weight to 70 parts by weight, with respect to 100 parts by weight of the binder resin.7. The brilliant toner according to claim 1 , ...

METHOD OF MANUFACTURING RESIN PARTICLES, APPARATUS FOR MANUFACTURING RESIN PARTICLES, AND IMAGE FORMING APPARATUS

A method of manufacturing resin particles uses a microreactor to mix first and second stock solutions, and to aggregate resin fine-particles to obtain resin particles. The microreactor includes stationary and rotating discs that are two discoid discs and that are disposed so that a gap is formed between circular surfaces of the two discs when the resin particles are manufactured, a first stock solution feed part that feeds the first stock solution from an end of the gap into the gap, and one or more second stock solution feed parts that are formed at the opposite side of the first stock solution feed part based on the center of the circular surface of the stationary disc by spatially connecting top and bottom surfaces of the stationary disc, and that feed the second stock solution containing an aggregating agent from the top surface side of the stationary disc to the gap. 1. A method of manufacturing resin particles , which uses a microreactor to mix a first stock solution and a second stock solution and to aggregate resin fine-particles to obtain resin particles , the microreactor including:a stationary disc and a rotating disc that are two discoid discs and that are disposed so that a gap is formed between circular surfaces of the two discs when the resin particles are manufactured;a first stock solution feed part that feeds the first stock solution, which is a resin fine-particle dispersion, from an end of the gap into the gap; andone or more second stock solution feed parts that are formed at an opposite side of the first stock solution feed part based on the center of the circular surface of the stationary disc by spatially connecting top and bottom surfaces of the stationary disc, and that feed the second stock solution containing an aggregating agent from the top surface side of the stationary disc to the gap.2. The method of manufacturing resin particles according to claim 1 , wherein a mixture of the first stock solution and the second stock solution in the ...

HEAT TREATMENT APPARATUS AND METHOD FOR MANUFACTURING TONER

An object of the present invention is to suppress the increase of coarse particles due to the fusion of powder particles and reduce a ratio of particles that have been excessively spheroidized, when the powder particles are heat-treated. A heat treatment apparatus including a raw-material supply unit, a hot-air supply unit for heat-treating a raw material and a discharge portion for discharging the heat-treated powder particles, and supplying hot air toward a raw material to be supplied from the raw-material supply unit, wherein the hot-air supply unit has a first nozzle and a second nozzle which spread in the radial direction downward from an upstream side in a hot-air supply direction, the second nozzle is arranged in the inside of the first nozzle, the hot air passes through a space between the first nozzle and the second nozzle, and an air-flow adjustment unit section for rotating the supplied hot air spirally along an inner wall face of the apparatus is provided in an outlet portion of the hot-air supply unit. 1. A heat treatment apparatus for heat-treating powder particles containing a thermoplastic binder resin , comprising:a raw-material supply unit for supplying the powder particles into the apparatus;a hot-air supply unit for heat-treating the supplied powder particles; anda discharge portion for discharging the heat-treated powder particles, the discharge portion being positioned in a downstream side of the raw-material supply unit and the hot-air supply unit,wherein: the raw-material supply unit is circularly provided so as to surround the hot-air supply unit at such a position as to be adjacent to an outer peripheral face of the hot-air supply unit, or at such a position as to be separated from the outer peripheral face in the horizontal direction,from an outlet of the hot-air supply unit, hot air is supplied toward the powder particles which are supplied from the raw-material supply unit,the hot-air supply unit has a first nozzle and a second nozzle ...

Toner, Manufacturing Method Thereof and Image Forming Method

A toner comprising a modified polyester resin containing a structure represented by Formula (1a) or (1b), wherein, in Formula (1a) and (1b), Rrepresents a hydrogen atom, a methyl group, or an ethyl group, Rrepresents an aliphatic hydrocarbon which may be branched, or an aromatic hydrocarbon, and Rrepresents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a phenyl group. 2. The method of wherein Step (d) further comprises the steps of:dispersing colorant particles in an aqueous medium to form a colorant particle dispersion liquid,mixing the modified polyester resin particle dispersion liquid and the colorant particle dispersion liquid, andaggregating the modified polyester resin particles and the colorant particles to form particles of the toner.4. The method of claim 1 , wherein Step (d) further comprises the steps of:forming the polyester resin particle dispersion liquid;carrying out aggregation by adding an aggregation agent to the polyester resin particle dispersion liquid to form core particles,adding at least the modified polyester resin particle dispersion liquid prepared and an aggregation agent; andcarrying out aggregation to form a shell layer on each core particle to form particles of the toner. This application is a Divisional Application of U.S. application Ser. No. 13/529,043 filed Jun. 21, 2012, which claimed the priority of Japanese Patent Application No. 2011-142632 filed on Jun. 28, 2011 in Japanese Patent Office, the entire content of both Applications are hereby incorporated by reference.The present invention related to: a toner used for image forming methods such as an electrophotographic method, an electrostatic recording method, an electrostatic printing method and a toner-jet method; a method of manufacturing the toner; and an image forming method employing the toner,In recent years, it has been more and more desired to output an image at a higher speed in the field of printers and copying apparatuses using an ...

COLORED TONER AND METHOD FOR PREPARING THE SAME

A method for preparing a colored toner. The method includes: 1) providing surface-treated colorant, polymerizing the colorant by atom transfer radical polymerization (ATRP) to produce polymer-grafted colorant particles and dispersing the colorant particles in an aqueous solution including a surfactant to yield a first emulsion; 2) providing surface-treated wax, polymerizing the wax by ATRP to produce polymer-grafted wax particles, and dispersing the wax particles in the aqueous solution including the surfactant to yield a second emulsion; and 3) agglutinating the first emulsion and the second emulsion. 1. A method for preparing a colored toner , the method comprising the following steps:a) providing surface-treated colorant as an initiating agent, polymerizing the colorant by atom transfer radical polymerization (ATRP) to produce polymer-grafted colorant particles, and dispersing the colorant particles in an aqueous solution comprising a surfactant to yield a first emulsion;b) providing surface-treated wax as an initiating agent, polymerizing the wax by ATRP to produce polymer-grafted wax particles, and dispersing the wax particles in the aqueous solution comprising the surfactant to yield a second emulsion; andc) agglutinating the first emulsion and the second emulsion.2. The method of claim 1 , wherein a third emulsion is added during the agglutinating claim 1 , and the third emulsion is a polymer emulsion produced by emulsion polymerization claim 1 , with polymerized monomers as materials.3. The method of claim 1 , wherein in the colored toner claim 1 , a mass percent of the content of the colorant particles is 3% to 10% and a mass percent of the content of the wax is 3% to 15%.4. The method of claim 1 , whereinthe surface-treated colorant is obtained by: 1) adding a colorant into a solvent, dispersing the colorant while dropwise adding a modifier for surface modification, and washing, filtering, and drying a modified product; andthe surface-treated wax is ...

TONER AND TONER PRODUCTION METHOD

The present invention provides a toner having superior color development property and a method of producing a toner having favorable particle size distribution and color development property, in which the toner containing a binder resin and a colorant that contains a phthalocyanine pigment represented by general formula (1), and the method for producing the toner. 2. The toner according to claim 1 , wherein Rin the general formula (1) is a monocyclic or polycyclic cyclic hydrocarbon group.3. The toner according to claim 2 , wherein Rin the general formula (1) is a norbornanediyl group claim 2 , norbornenediyl group or adamantanediyl group.7. The toner according to claim 1 , wherein M in the general formula (1) is Si.8. The toner according to claim 1 , further containing a wax.10. The method of producing a toner according to claim 9 , wherein Rin the general formula (1) is a monocyclic or polycyclic cyclic hydrocarbon group.11. The method of producing a toner according to claim 10 , wherein Rin the general formula (1) is a norbornanediyl group claim 10 , norbornenediyl group or adamantanediyl group.15. The method of producing a toner according to claim 9 , wherein M in the general formula (1) is Si.16. The method of producing a toner according to claim 9 , wherein the polymerizable monomer composition further contains a wax. 1. Field of the InventionThe present invention relates to a toner used in a recording method such as electrophotography, electrostatic recording, magnetic recording or toner-jet recording, and to a method for producing the toner.2. Description of the Related ArtThere has been a growing demand for high image quality of color images in image-forming apparatuses. In image-forming apparatuses such as digital full-color copiers and printers, an original image is first subjected to color separation with blue, green and red color filters. An electrostatic latent image corresponding to the original image is then formed on a photosensitive member, which ...

CURABLE COATING MATERIAL FOR NON-IMPACT PRINTING

Coating material () being processable by non-impact printing to form at least a part of a coating layer () representing an image; the coating material () comprising an amorphous resin portion and being curable; the coating material () being configured for being applied with a thickness of at least 15 μm; wherein preferably the coating material () is configured for being applied with a thickness of at least 20 in particular with a thickness of at least 30 further in particular with a thickness of at least 40 μm; the coating material comprising one or more of the following: (i) a polyester resin comprising at least one incorporated acid monomer and wherein at least 10 weight percent of the at least one incorporated acid monomer is isophthalic acid; (ii) a polyester resin containing 1 to 100 w-% of cycloaliphatic glycol compounds with respect to the total weight of the glycol compounds of the polyester resin component, in particular 2,2,4,4-tetraalkylcyclobutane-1,3-diol and/or 2,2,4,4-tetramethyl-1,3-cyclobutanediol; (iii) an acrylic resin; (iv) a fluorine containing polymer, in particular a hydroxyl functional fluorine polymer; (v) a polyurethane resin. 115-. (canceled)16. Coating material being processable by non-impact printing to form at least a part of a coating layer representing an image;the coating material comprising an amorphous resin portion and being curable;the coating material being configured for being applied with a thickness of at least 15 μm;wherein preferably the coating material is configured for being applied with a thickness of at least 20 μm, in particular with a thickness of at least 30 μm, further in particular with a thickness of at least 40 μm;wherein the coating material comprises an amount of 0.1 weight percent to 10 weight percent of a charge control agent, CCA;the coating material comprising one or more of the following:(i) a polyester resin comprising at least one incorporated acid monomer and wherein at least 10 weight percent of the ...

Continuous Coalescence Process for Sustainable Toner

A continuous coalescence process for preparing a sustainable toner is described which features toner with lowered melt properties and higher toner surface carbon to oxygen (C/O) ratios than previously described sustainable resins coalesced in a batch reactor. 1. A continuous coalescence process for making a sustainable toner comprising the step of continuously coalescing toner particles , wherein the toner particles comprise at least one bio-based resin , comprising a coalescence time of from about 30 seconds to about 10 minutes at a temperature of at least about 80° C. to produce sustainable toner , wherein said sustainable toner optionally comprises a crystalline polyester (CPE) resin , a gel or both.2. The process of claim 1 , wherein coalescing comprises coalescing at a temperature of from about 80° C. to about 95° C.3. The process of claim 1 , where coalescing comprises coalescing at a pH from about 7 to about 9.4. The process of claim 1 , wherein coalescing occurs in a single continuous reactor.5. The process of claim 1 , wherein coalescing occurs in plural continuous reactors.6. The process of claim 1 , wherein said toner particles are made in a batch reactor.7. The process of claim 1 , wherein said toner particles are made in a continuous reactor.8. The process of claim 1 , comprising a residence time of from about 40 seconds to about 7 minutes.9. The process of claim 1 , wherein said sustainable toner comprises coalesced particles having a median diameter (D) of from about 3.5 μm to about 8 μm.10. The process of claim 1 , wherein said sustainable toner comprises particles comprising a surface C/O ratio of about 4 or higher.11. The process of claim 1 , wherein the sustainable toner comprises a crystalline polyester resin present in an amount of 4 weight percent or less.12. The process of claim 1 , wherein the sustainable toner is free of crystalline polyester resin.13. The process of claim 1 , wherein said sustainable toner comprises 0% gel.14. The process ...

TONER FOR DEVELOPING ELECTROSTATIC CHARGE IMAGE AND METHOD FOR PREPARING THE SAME

A toner for developing an electrostatic charge image includes three or more elements selected from a group including an iron element, a silicon element, a sulfur element and a fluorine element and a binder resin including an amorphous polyester-based resin. 1. A toner for developing an electrostatic charge image , comprising:three or more elements selected from a group consisting of an iron element, a silicon element, a sulfur element, and a fluorine element,{'sup': 3', '4', '3', '3', '3', '4, 'wherein, when included, a content of the iron element in the toner is in a range of 1.0×10to 1.0×10ppm, a content of the silicon element in the toner is in a range of 1.0×10to 8.0×10ppm, a content of the sulfur element in the toner is in a range of 500 to 3,000 ppm, and a content of the fluorine element is in a range of 1.0×10to 1.0×10ppm; and'}a binder resin comprising an amorphous polyester-based resin, wherein:an aromatic ring concentration of the amorphous polyester-based resin is in a range of 4.5 to 5.8 mol/kg;a weight average molecular weight (MW) of the amorphous polyester-based resin is in a range of 7,000 to 50,000;a glass transition temperature (Tg) of the amorphous polyester-based resin is in a range of 50 to 70° C.; and [{'br': None, 'i': Tg=', 'MW', 'a', 'a−, '7.26×ln()+(where −19.33≦4.29)\u2003\u2003(Equation 1)'}, {'br': None, 'i': Tg=', 'MW', 'b', 'b≦, '2.67×ln()+(where 21.07≦39.48).\u2003\u2003(Equation 2)'}], 'if a weight average molecular weight (MW) of the amorphous polyester-based resin is in a range of 7,000 or more to less than 14,000, Equation 1 is satisfied, and if the weight average molecular weight (MW) is in a range of 14,000 or more to 50,000 or less, Equation 2 is satisfied2. The toner of claim 1 , wherein:the amorphous polyester-based resin has a polycarboxylic acid component as a structural unit, and the polycarboxylic acid component has a substituent group corresponding to three or more carboxyl groups.4. The toner of claim 3 , wherein:B is a ...

LIQUID DEVELOPER

A liquid developer containing toner particles containing a resin and a basic dispersant in an insulating liquid, wherein the resin contains a polyester A having a furan ring. The liquid developer of the present invention is suitably used in development and the like of latent images formed in an electrophotographic method, an electrostatic recording method, an electrostatic printing method, or the like. 1: A liquid developer comprisingtoner particles comprising a resin and a basic dispersant in an insulating liquid, wherein the resin comprises a polyester A having a furan ring.2: The liquid developer according to claim 1 , wherein the polyester A is a polyester obtained by polycondensing a carboxylic acid component and an alcohol component claim 1 , andwherein at least one of the carboxylic acid component and the alcohol component comprises a raw material monomer having a furan ring.3: The liquid developer according to claim 2 , whereinthe carboxylic acid component comprises a raw material monomer having a furan ring, and a total amount of the raw material monomer of the carboxylic acid component that has a furan ring is 10% by mol or more and 100% by mol or less of a total amount of the carboxylic acid component and the alcohol component;the alcohol component comprises a raw material monomer having a furan ring, and a total amount of the raw material monomer of the alcohol component that has a furan ring is 10% by mol or more and 100% by mol or less of a total amount of the carboxylic acid component and the alcohol component; oreach of the carboxylic acid component and the alcohol component comprises a raw material monomer having a furan ring and a total amount of the raw material monomer that has a furan ring in each of the carboxylic acid component and the alcohol component is 10% by mol or more and 100% by mol or less of a total amount of the carboxylic acid component and the alcohol component.4: The liquid developer according to claim 2 , wherein the alcohol ...

ELECTROSTATIC IMAGE DEVELOPER

Disclosed is an electrostatic image developer containing colored resin particles containing a binder resin and a colorant, and an external additive, wherein, as the external additive, the electrostatic image developer contains plate-shaped zinc oxide fine particles having an average longer length of 50 to 2,000 nm and a value S of 0.0001 to 0.03 nm, which is a value obtained by dividing an average thickness d of the particles by an average base area A of the particles, and a content of the plate-shaped zinc oxide fine particles is in the range from 0.05 to 1 part by mass, with respect to 100 parts by mass of the colored resin particles. 1. An electrostatic image developer comprising colored resin particles containing a binder resin and a colorant , and an external additive ,wherein, as the external additive,{'sup': '−1', 'the electrostatic image developer contains plate-shaped zinc oxide fine particles having an average longer length of 50 to 2,000 nm and a value S of 0.0001 to 0.03 nm, which is a value obtained by dividing an average thickness d of the particles by an average base area A of the particles, and'}a content of the plate-shaped zinc oxide fine particles is in the range from 0.05 to 1 part by mass, with respect to 100 parts by mass of the colored resin particles.2. The electrostatic image developer according to claim 1 , comprising the colored resin particles containing the binder resin claim 1 , the colorant and a charge control agent claim 1 , and the external additive claim 1 ,wherein, as the external additive,{'sup': '−1', 'the electrostatic image developer contains the plate-shaped zinc oxide fine particles having an average longer length of 50 to 2,000 nm and a value S of 0.0001 to 0.03 nm, which is the value obtained by dividing the average thickness d of the particles by the average base area A of the particles, and'}the content of the plate-shaped zinc oxide fine particles is in the range from 0.05 to 1 part by mass, with respect to 100 parts by ...

TONER, DEVELOPING APPARATUS, AND IMAGE-FORMING APPARATUS

A toner comprising a toner particle containing a binder resin, a colorant, an amorphous polyester, and a crystalline polyester, wherein the binder resin contains a vinyl resin; the amorphous polyester has a monomer unit derived from a linear aliphatic dicarboxylic acid having 6 to 12 carbons, and a monomer unit derived from a dialcohol; the content of the monomer unit derived from a linear aliphatic dicarboxylic acid having 6 to 12 carbons is 10 to 50 mol % with reference to the total monomer units derived from a carboxylic acid in the amorphous polyester; and in a cross section of the toner particle, the vinyl resin constitutes a matrix and the amorphous polyester constitutes domains, and the crystalline polyester is present in the interior of the domains. 1. A toner comprising a toner particle containing a binder resin , a colorant , an amorphous polyester , and a crystalline polyester ,the binder resin containing a vinyl resin, a monomer unit derived from a linear aliphatic dicarboxylic acid having at least 6 and not more than 12 carbons, and', 'a monomer unit derived from a dialcohol,, 'the amorphous polyester having'}the content of the monomer unit derived from the linear aliphatic dicarboxylic acid having at least 6 and not more than 12 carbons being at least 10 mol % and not more than 50 mol % with reference to the total monomer units derived from a carboxylic acid in the amorphous polyester, andin a cross section of the toner particle observed with a transmission electron microscope,the vinyl resin constituting a matrix and the amorphous polyester constituting domains, andthe crystalline polyester being present in the interior of the domains.2. The toner according to claim 1 , wherein the amorphous polyester domains have in their interior a lamellar structure derived from the crystalline polyester.3. The toner according to claim 1 , wherein the peak molecular weight Mp(P) of the amorphous polyester is at least 8 claim 1 ,000 and not more than 13 claim 1 ,000 ...

IMAGE FORMING APPARATUS

An image forming apparatus includes an electrophotographic photoreceptor having an overcoat layer and a cleaning unit that includes a cleaning blade and a tip of the cleaning blade contacts with the photoreceptor toward the direction opposite to the rotation direction, wherein the toner particle contains a crystalline polyester resin, an average circularity of the toner particles is from 0.955 to 0.971, a content ratio of the toner particles having a particle diameter of 4.5 μm or more and less than 7.5 μm and a circularity of 0.980 or more is from 16% by number to 40% by number, and a content ratio of the toner particles having a particle diameter of 7.5 μm or more and less than 15 μm and a circularity of 0.900 or more and less than 0.940 is 3% by number or less. 1. An image forming apparatus comprising:an electrophotographic photoreceptor that is provided with a photosensitive layer and an overcoat layer on an electroconductive substrate in this order;a charge unit that charges a surface of the electrophotographic photoreceptor;an electrostatic latent image forming unit that forms an electrostatic latent image on a charged surface of the electrophotographic photoreceptor;a developing unit that contains a developer containing toner particles, and develops the electrostatic latent image formed on the surface of the electrophotographic photoreceptor with the developer to form a toner image;a transfer unit that transfers the toner image to a surface of a recording medium;a cleaning unit that includes a cleaning blade and a tip of the cleaning blade contacts with the electrophotographic photoreceptor toward the direction opposite to a rotation direction of the electrophotographic photoreceptor to remove a residue on the surface of the electrophotographic photoreceptor; anda fixing unit that fixes the toner image transferred on the recording medium,wherein the toner particle contains a binder resin containing a crystalline polyester resin, a colorant, and a release ...

TONER, DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS

Provided is a toner comprising a toner particle including a binder resin, an amorphous polyester, and a colorant, wherein the binder resin includes a vinyl resin, the toner has a softening point of at least 110° C. and not more than 140° C., an amount of the amorphous polyester is at least 4.0 parts by mass and not more than 30.0 parts by mass with respect to 100 parts by mass of the binder resin, and a temperature T at which an area increasing rate of one toner particle sample becomes 1.40, is not more than 110° C., and a slope of the area increasing rate with respect to a temperature in the range of the area increasing rate of 1.40 to 2.00 is not more than 0.07. 1. A toner comprising toner particles each of which includes a binder resin , an amorphous polyester , and a colorant , whereinthe binder resin includes a vinyl resin,the toner has a softening point of at least 110° C. and not more than 140° C.,an amount of the amorphous polyester is at least 4.0 parts by mass and not more than 30.0 parts by mass with respect to 100 parts by mass of the binder resin, and whereinwhen observing the toner which is sandwiched with a pair of cover glasses while heating the cover glasses from 40° C. to 160° C. at a temperature increasing rate of 1.5° C./sec., and defining an area of one of the toner particles at the temperature of 40° C. as 1,a temperature T at which an area increasing rate becomes 1.40, is not more than 110° C., anda slope of the area increasing rate with respect to a temperature in the range of the area increasing rate of 1.40 to 2.00 is not more than 0.07.2. The toner according to claim 1 , whereinthe amount of the amorphous polyester is at least 5.0 parts by mass and not more than 30.0 parts by mass with respect to 100 parts by mass of the binder resin,the amorphous polyester includes a monomer unit derived from an alcohol component and a monomer unit derived from a straight-chain aliphatic dicarboxylic acid having at least 6 and not more than 12 carbon ...

TONER, DEVELOPING APPARATUS, AND IMAGE-FORMING APPARATUS PROVIDED WITH TONER

A toner having a toner particle containing a binder resin, an amorphous polyester, and a colorant, wherein a softening point of the toner is at least 110° C. and not more than 140° C.; an integrated value f1 for stress of the toner is not more than 10 g·m/sec, as measured using a tack tester, with a temperature for a probe end being 150° C. and a press holding time being 0.01 seconds; and an integrated value f2 for stress of the toner is at least 30 g·m/sec, as measured using a tack tester, with a temperature for a probe end being 150° C. and a press holding time being 0.1 seconds. 1. A toner comprising a toner particle containinga binder resin, an amorphous polyester, and a colorant,whereina softening point of the toner is at least 110° C. and not more than 140° C.;an integrated value f1 for stress of the toner is not more than 10 g·m/sec, as measured using a tack tester, with a temperature for a probe end being 150° C. and a press holding time being 0.01 seconds; andan integrated value f2 for stress of the toner is at least 30 g·m/sec, as measured using a tack tester, with a temperature for a probe end being 150° C. and a press holding time being 0.1 seconds.2. The toner according to claim 1 , whereinthe binder resin contains a vinyl resin;the amorphous polyester has a monomer unit derived from a linear aliphatic dicarboxylic acid having at least 6 and not more than 12 carbons and a monomer unit derived from an alcohol component; anda content of the monomer unit derived from a linear aliphatic dicarboxylic acid having at least 6 and not more than 12 carbons is at least 10 mol % and not more than 50 mol % relative to a total monomer unit derived from a carboxylic acid component constituting the amorphous polyester.3. The toner according to claim 1 , whereina peak molecular weight of the amorphous polyester is at least 8,000 and not more than 13,000 anda softening point of the amorphous polyester is at least 85° C. and not more than 105° C.4. The toner according to ...

TONER

A toner including a toner particle including a binder resin, wherein fine particles A and B are present on a surface of the toner particle; the fine particles A are a fatty acid metal salt; the fine particles B have a specific volume resistivity; an average theoretical surface area of the toner particle, an amount of the fine particles A, and a coverage ratio of the toner particle surface by the fine particles A satisfy a specific relationship; the amount of the fine particles B is in a specific range; and a proportion F of an area occupied by a part of the fine particles B embedded in a surface vicinity region of the toner in a total area occupied by the fine particles B present in a cross section of one particle of the toner is 50% by area or more. 1. A toner comprising a toner particle including a binder resin , whereinfine particles A and fine particles B are present on a surface of the toner particle;the fine particles A are fatty acid metal salt;{'sup': '8', 'the fine particles B have a volume resistivity of from 5.0×10 Ωm to 1.0×10Ωm;'}when,{'sup': '2', 'an average theoretical surface area obtained from a number average particle diameter, particle size distribution and true density of the toner particle measured by a Coulter counter is denoted by C (m/g),'}an amount of the fine particles A with respect to 100 parts by mass of the toner particle is denoted by D (parts by mass), anda coverage ratio of a surface of the toner particle by the fine particles A is denoted by E (%), [{'br': None, 'i': 'D/C≤', '0.03≤1.50\u2003\u2003(1),'}, {'br': None, 'i': E', 'D/C, '/()≤50.0\u2003\u2003(2);'}], 'formulas (1) and (2) below are satisfiedan amount of the fine particles B is from 0.10 parts by mass to 3.00 parts by mass based on 100 parts by mass of the toner particle; andin an observation of a cross-section of the toner by a transmission electron microscope, a proportion F of an area occupied by a part of the fine particles B in which a length of a portion of each of ...

TONER

A toner comprising: a toner particle including a binder resin; and an external additive, wherein the external additive includes an external additive A which is silica fine particles and an external additive B which is a fatty acid metal salt, the external additive A has a specific particle diameter, a coverage ratio of a surface of the toner particle with the external additive A is from 60% to 80%, and where an average theoretical surface area obtained from a number average particle diameter, a particle size distribution and a true density of the toner particle is denoted by C (m/g), an amount of the external additive B is denoted by D (parts by mass) and a coverage ratio of the surface of the toner particle with the external additive B is denoted by E (%), following formulas are satisfied: 1. A toner comprising:a toner particle including a binder resin; andan external additive, whereinthe external additive includes an external additive A and an external additive B,the external additive A is silica fine particles,the external additive B is a fatty acid metal salt,the external additive A has a number average particle diameter of primary particles of from 5 nm to 25 nm,a coverage ratio of a surface of the toner particle with the external additive A is from 60% to 80%, and{'sup': '2', 'claim-text': [{'br': None, 'i': 'D/C≤', '0.05≤2.00\u2003\u2003(1)'}, {'br': None, 'i': E', 'D/C, '/()≤50.0\u2003\u2003(2).'}], 'where an average theoretical surface area obtained from a number average particle diameter, a particle size distribution and a true density of the toner particle measured by a Coulter counter is denoted by C (m/g), an amount of the external additive B with respect to 100 parts by mass of the toner particle is denoted by D (parts by mass) and a coverage ratio of the surface of the toner particle with the external additive B is denoted by E (%), following formulas (1) and (2) are satisfied2. The toner according to claim 1 , wherein a fixation ratio F of the ...

CARRIER, XEROGRAPHIC DEVELOPER, AND CARRIER PRODUCTION METHOD

The present invention relates to a carrier including: a magnetic core material; and a resin coating layer coating a surface of the magnetic core material, in which the resin coating layer contains a binder resin, and fluorine element-containing resin particles dispersed in the binder resin, the resin coating layer has a coefficient of variation of a film thickness of 25% or less, and the resin coating layer has an average value of the number of the fluorine element-containing resin particles being 3 particles/μmor more and 350 particles/μmor less per unit area in a cross section of the resin coating layer, and has a coefficient of variation thereof being 20% or less. 1. A carrier comprising: a magnetic core material; and a resin coating layer coating a surface of the magnetic core material ,wherein the resin coating layer comprises a binder resin, and fluorine element-containing resin particles dispersed in the binder resin,the resin coating layer has a coefficient of variation of a film thickness of 25% or less, and{'sup': 2', '2, 'the resin coating layer has an average value of the number of the fluorine element-containing resin particles being 3 particles/μmor more and 350 particles/μmor less per unit area in a cross section of the resin coating layer, and has a coefficient of variation thereof being 20% or less.'}2. The carrier according to claim 1 , having a surface coverage of the magnetic core material by the resin coating layer being 60% or more and 95% or less.3. The carrier according to claim 1 , wherein the resin coating layer has a mass ratio of contents of the fluorine element-containing resin particles and the binder resin being 9:1 to 2:8.4. The carrier according to claim 1 , wherein the fluorine element-containing resin particles have a volume average particle diameter (D) of 0.05 μm or more and 0.40 μm or less.5. The carrier according to claim 1 , wherein the fluorine element-containing resin particles are one kind or more selected from a ...

TONER

Toner comprising a toner particle comprising a core particle comprising a binder resin and a shell formed on a surface of the core particle, wherein given YA (number %) as an abundance ratio of particles with a particle perimeter of less than 6.332 μm, in a dispersion of the toner treated under the following ultrasound condition A, given XB as an average aspect ratio of the toner and YB (number %) as an abundance ratio of particles with a particle perimeter of less than 6.332 μm, in a dispersion of the toner treated under the following ultrasound condition B, 0.75≤XB≤0.85 and 0.10≤YA−YB≤2.50 are satisfied: where ultrasound condition A: output frequency 30 kHz, output capacity 15 W, ultrasound intensity 100%, exposure time 300 s, and ultrasound condition B: output frequency 30 kHz, output capacity 15 W, ultrasound intensity 5%, exposure time 300 s. 2. The toner according to claim 1 , wherein given XA as an average aspect ratio of the toner claim 1 , as measured with a flow particle image measurement apparatus claim 1 , in a dispersion of the toner treated under the ultrasound condition A claim 1 , formula (3) below is satisfied:{'br': None, 'i': 'XA≤', '0.75≤0.85\u2003\u2003(3).'}3. The toner according to claim 1 , wherein the YB is not more than 60.00 number %.4. The toner according to claim 2 , wherein the YB is not more than 60.00 number %.5. The toner according to claim 1 , wherein the toner particle comprises a surfactant.6. The toner according to claim 2 , wherein the toner particle comprises a surfactant.7. The toner according to claim 3 , wherein the toner particle comprises a surfactant.8. The toner according to claim 4 , wherein the toner particle comprises a surfactant.9. The toner according to claim 5 , wherein the surfactant is contained in the shell.10. The toner according to claim 6 , wherein the surfactant is contained in the shell.11. The toner according to claim 7 , wherein the surfactant is contained in the shell.12. The toner according to claim 8 ...

TONER, DEVELOPING DEVICE, AND PROCESS CARTRIDGE

A toner is provided. The toner includes toner particles each including a binder resin and a release agent. From 20% to 80% by number of the toner particles satisfy the following formulae (1) and (2): 1. A toner , comprising: a binder resin; and', 'a release agent,, 'toner particles, each toner particle comprising [{'br': None, 'i': 'T/Dv≦', '2/3≦1.5 \u2003\u2003(1)'}, {'br': None, 'i': 'R/Dv≦', '1/3≦1.0 \u2003\u2003(2)'}], 'wherein a first amount of the toner particles satisfy formula (1) and a second amount of the toner particles satisfy formula (2) and a ratio of the second amount of toner particles to the first amount of toner particles is from 20% to 80% by numberwherein Dv represents a volume average particle diameter of the toner particles; andT and R represent the longest cross-sectional diameters of each toner particle and the release agent contained therein, respectively, measured by observing cross-sections of the toner particles with scanning transmission electron microscope.2. The toner according to claim 1 , wherein the release agent contained in each cross-section of the toner particles has a shape factor SF-1 of from 100 to 140.3. The toner according to claim 1 , wherein the toner particles have an average circularity of 0.96 or more.4. The toner according to claim 1 , wherein each toner particle further comprises:an external additive; and the binder resin;', 'the release agent; and', 'a plurality of fine resin particles on its surface, each fine resin particle composed of a vinyl polymeric resin,, 'a mother particle includingwherein the mother particle has a sea-island structure in which the fine resin particles serve as island portions and constituents other than the fine resin particles serve as sea portions.5. The toner according to claim 4 , wherein each fine resin particle is half embedded in the surface of the mother particle to form surface asperity thereon.6. The toner according to claim 1 , wherein the binder resin comprises a polyester- ...

Electrostatic charge image developing toner

An electrostatic charge image developing toner includes a plurality of toner particles. Each of the plurality of toner particles includes a toner core and a shell layer covering the toner core. The shell layer contains a thermosetting resin. A content ratio of a toner component insoluble in tetrahydrofuran is at least 90 mass % relative to mass of the toner. Melt viscosity of the toner at 75° C. is at least 1.0×10 4 Pa·s and no greater than 1.0×10 5 Pa·s. The thermosetting resin is preferably a melamine resin or a urea resin. The toner core preferably contains a binder resin, and the binder resin has a softening point (Tm) of at least 85° C. and no greater than 95° C.

TONER AND PROCESS FOR PRODUCING THE SAME

The toner according to the present invention is used for electrostatic latent image development, and has toner particles containing a binder resin, a colorant and a release agent. The binder resin is composed of a non-crystalline resin and a crystalline resin. The toner satisfies the relationship represented by specific expressions specified by the endothermic property of the crystalline resin, the endothermic property of the toner and the content ratio of the binder resin in the toner particles. 2. The toner according to claim 1 , wherein the crystalline resin is a urethane-modified crystalline resin in which a urethane crystalline polymerization segment is bonded to a crystalline polymerization segment claim 1 , and a peak temperature of the melting peak in the first DSC curve obtained in the second heating process is within the range of 60° C. to 90° C.3. The toner according to claim 2 , wherein the urethane-modified crystalline resin is a urethane-modified crystalline polyester resin claim 2 , and the crystalline polymerization segment thereof comprises a crystalline aliphatic polyester polymer.4. The toner according to claim 3 , wherein one or both of at least one polymer terminal of the urethane-modified crystalline polyester resin and the urethane polymerization segment of the urethane-modified crystalline polyester resin has a carboxyl group claim 3 , and an acid value of the urethane-modified crystalline polyester resin is within the range of 7 to 20 mgKOH/g.5. The toner according to claim 1 , wherein the non-crystalline resin comprises a vinyl resin claim 1 , and the toner satisfies the following Expression (3):{'br': None, 'i': 'TgAm Подробнее

ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, AND TONER CARTRIDGE

An electrostatic charge image developing toner includes toner particles containing an aluminum pigment that is coated with silica and a binder resin, wherein the following formula is satisfied: 1. An electrostatic charge image developing toner , comprising:toner particles containing an aluminum pigment that is coated with silica and a binder resin, {'br': None, 'i': 'A/B≦', '0.040'}, 'wherein the following formula is satisfiedwhere A represents a content (atom %) of a Si element of the toner particles and B represents a content (atom %) of a C element of the toner particles, A and B being measured by X-ray photoelectron spectroscopy (XPS).2. The electrostatic charge image developing toner according to claim 1 , {'br': None, 'i': 'X/Y≦', '2≦100'}, 'wherein the following formula is satisfiedwhere X represents a reflectance at a light-receiving angle of +30° and Y represents a reflectance at a light-receiving angle of −30°, X and Y being measured when a solid image formed by the toner is irradiated with an incident light having an incident angle of −45° using a goniophotometer.3. The electrostatic charge image developing toner according to claim 1 ,wherein an average maximum thickness of the toner is defined as C and an average equivalent circle diameter of the toner is defined as D, D is larger than C.4. The electrostatic charge image developing toner according to claim 3 ,wherein a ratio (C/D) of the average maximum thickness C to the average equivalent circle diameter D is from 0.001 to 0.500.5. The electrostatic charge image developing toner according to claim 1 ,wherein in a case where a cross section in the thickness direction of the toner is observed, a number of a metallic pigment in which an angle between the long axis direction on a cross section of the toner and the long axis direction of the metallic pigment is within a range from −30° to +30° is equal to or greater than 60% in the entirety of metallic pigments observed.6. The electrostatic charge image ...

BASE PARTICLE AND ELECTROSTATIC IMAGE DEVELOPING TONER

Provided are a toner base particle having a core-shell structure, which comprise: a core particle containing at least a binder resin and a colorant; and as a shell, a resin fine particle containing at least a release agent and attaching to the surface of the core particle, wherein a mass of the release agent contained in the specific area is from 50 to 100% of a mass of all release agents in said toner base particle, and a shape factor of said toner base particle is 150 or more, and an electrostatic image developing toner obtained by externally adding an external additive to the toner base particle. 1. A toner base particle having a core-shell structure , which comprise: a core particle containing at least a binder resin and a colorant; and as a shell , a resin fine particle containing at least a release agent and attaching to the surface of the core particle , whereinwhen out of TEM images of a cross-section of said toner base particle, a cross-sectional image where a long diameter of the cross-section is 80% or more of a volume median diameter (Dv) of said toner base particle is image-processed and an approximate ellipse having an area corresponding to 84.6% of a cross-sectional area of said toner base particle is delineated inside of said cross-section, a mass of the release agent contained outside of an approximate oval sphere obtained by rotating said approximate ellipse around the major axis thereof is from 50 to 100% of a mass of all release agents in said toner base particle, and a shape factor of said toner base particle is 150 or more.2. A toner base particle having a core-shell structure , which comprise: a core particle containing at least a binder resin and a colorant; and as a shell , a resin fine particle containing at least a release agent and attaching to the surface of the core particle , whereina mass of the release agent in said shell is from 50 to 100% of a mass of all release agent in said toner base particle and a shape factor of said toner ...

ELECTROPHOTOGRAPHIC DEVELOPER SET COMPRISING TONER AND POWDER ADHESIVE, AND METHOD FOR PRODUCING BONDED PRODUCT

An electrophotographic developer set comprising a toner, and a powder adhesive, wherein the powder adhesive comprises a crystalline polyester resin, and a thermoplastic resin other than the crystalline polyester resin; the amount of the crystalline polyester resin in the powder adhesive is 21% by mass or more; the melting point of the crystalline polyester resin is 55° C. to 100° C.; in a viscoelasticity measurement, where Gt′(100) denotes a storage elastic modulus of the toner at 100° C. and Gb′(100) denotes a storage elastic modulus of the powder adhesive at 100° C., Gb′(100) is 1.0×10Pa or less and Gt′(100)/Gb′(100) is 1.2 or more. 2. The electrophotographic developer set according to claim 1 , wherein the Gt′(100)/Gb′(100) is 2.0 to 30.0.3. The electrophotographic developer set according to claim 1 , whereinin the viscoelasticity measurement,{'sup': '4', 'where Tb denotes the temperature at which the storage elastic modulus Gb′ of the powder adhesive is 1.0×10Pa, and'}{'sup': '4', 'Tt denotes the temperature at which the storage elastic modulus Gt′ of the toner is 1.0×10Pa,'}Tt−Tb is 10° C. or higher.4. The electrophotographic developer set according to claim 1 , whereinin the viscoelasticity measurement of the powder adhesive,the maximum value of the ratio (tan δ) of a loss elastic modulus G″ of the powder adhesive to the storage elastic modulus G′ of the powder adhesive in the range of 55° C. to 100° C. is less than 3.0.5. The electrophotographic developer set according to claim 1 , whereinthe crystalline polyester resin comprised in the powder adhesive is a polycondensation polymer of an aliphatic diol having 2 to 12 carbon atoms and an aliphatic dicarboxylic acid having 2 to 12 carbon atoms.6. The electrophotographic developer set according to claim 1 , whereinthe thermoplastic resin comprised in the powder adhesive comprises a non-crystalline polyester resin as a main component.7. The electrophotographic developer set according to claim 1 , whereinthe ...

TONER, IMAGE FORMING APPARATUS, AND IMAGE FORMATION METHOD

A toner includes toner particles. The toner particles each include a toner mother particle containing a binder resin and an external additive attached to a surface of the toner mother particle. The external additive includes fluororesin particles. The fluororesin particles have a number average primary particle diameter of at least 100 nm and no greater than 300 nm. An area ratio of a region of the surface of the toner mother particle that is covered with the fluororesin particles is at least 0.70% and no greater than 2.20% in the surface of the toner mother particle. 1. A toner comprising toner particles , whereinthe toner particles each include a toner mother particle containing a binder resin and an external additive attached to a surface of the toner mother particle,the external additive includes fluororesin particles,the fluororesin particles have a number average primary particle diameter of at least 100 nm and no greater than 300 nm, andan area ratio of a region of the surface of the toner mother particle that is covered with the fluororesin particles is at least 0.70% and no greater than 2.20% in the surface of the toner mother particle.2. The toner according to claim 1 , whereinthe area ratio of the region of the surface of the toner mother particle that is covered with the fluororesin particles is at least 0.72% and no greater than 1.09% in the surface of the toner mother particle.3. The toner according to claim 1 , whereinthe fluororesin particles contain polytetrafluoroethylene.4. The toner according to claim 1 , whereinan amount of the fluororesin particles is at least 0.30 parts by mass and no greater than 0.60 parts by mass relative to 100 parts by mass of the toner mother particles.5. The toner according to claim 1 , whereinthe external additive further includes inorganic particles.6. An image forming apparatus comprising:an image bearing member; anda development device configured to develop an electrostatic latent image formed on a surface of the ...

APPARATUS FOR HEAT-TREATING POWDER PARTICLES AND METHOD OF PRODUCING TONER

Provided is an apparatus for heat treatment capable of heat-treating toner particles efficiently and uniformly while suppressing increase of coarse particles due to coalescence, to thereby enable stable toner production. The apparatus for heat-treating powder particles each of which contains a binder resin and a colorant includes: a cylindrical treatment chamber in which the powder particles are heat-treated; a columnar member () provided so as to protrude from a lower end part of the treatment chamber toward an upper end part thereof; a powder particle supply unit () for supplying the powder particles to the treatment chamber; a hot air supply unit () for heat-treating the supplied powder particles; and a collection unit () for collecting the heat-treated powder particles discharged outside the treatment chamber through a toner discharge port provided on the lower end part side of the treatment chamber. The hot air supply unit is provided so that the hot air is supplied along an inner circumferential surface of the treatment chamber. The powder particle supply unit includes multiple particle supply ports provided on an outer circumferential surface of the columnar member. The toner discharge port is provided in an outer circumferential portion of the treatment chamber so as to keep a rotation direction of the powder particles. 1. An apparatus for heat-treating powder particles each of which contains a binder resin and a colorant , the apparatus comprising:(1) a treatment chamber having a cylindrical shape, in which the powder particles are heat-treated;(2) a columnar member having a substantially circular shape in cross-section, the columnar member being provided on a center axis of the treatment chamber so as to protrude from a lower end part of the treatment chamber toward an upper end part of the treatment chamber;(3) a powder particle supply unit for supplying the powder particles to the treatment chamber;(4) a hot air supply unit for supplying hot air for heat ...

POLYMERIC COMPOSITE MATERIALS, MANUFACTURE, AND USES

Composite materials such as composite particles have a solid non-elastomeric continuous phase made of an organic polymer having a glass transition temperature of at least 25° C. Dispersed within this solid non-elastomeric continuous phase are many multi-compartment porous chemically crosslinked elastomeric particles that have a mode particle size of at least 1 μm and up to and including 10 μm. The composite particles can be used as toner particles in electrophotographic imaging methods to provide fused toner images and especially stacked fused toner images.

REDUCING CONTAMINATION

In an example of a method for reducing contamination, a purified imaging oil is formed by filtering an imaging oil through an imaging oil filter, and then filtering the imaging oil through a polar absorbent filter. A surface of an amorphous silicon photoconductor of a liquid electrophotographic printing apparatus is maintained by periodically applying the purified imaging oil to the amorphous silicon photoconductor. 1. A method for reducing contamination , the method comprising: filtering an imaging oil through an imaging oil filter; and', 'then filtering the imaging oil through a polar absorbent filter; and, 'forming a purified imaging oil bymaintaining a surface of an amorphous silicon photoconductor of a liquid electrophotographic printing apparatus by periodically applying the purified imaging oil to the amorphous silicon photoconductor.2. The method as defined in wherein prior to the periodically applying claim 1 , the method further comprises determining that a contamination level of the purified imaging oil ranges from 0 pico Ohms/cm up to 10 pico Ohms/cm.3. The method as defined in wherein the periodically applying occurs prior to a charging portion of each printing cycle of the liquid electrophotographic printing apparatus.4. The method as defined in claim 1 , further comprising:removing some of the purified imaging oil from the amorphous silicon photoconductor, wherein the removed purified imaging oil includes at least some fluid residue from the amorphous silicon photoconductor, thereby cleaning the amorphous silicon photoconductor; andperforming a print cycle.5. The method as defined in wherein:the imaging oil filter is a mechanical filter of 2 micron particles; andthe polar absorbent filter is a silica gel filter or a carbon filter.6. The method as defined in claim 1 , further comprising performing a full cleaning procedure at least 200 claim 1 ,000 print cycles after an initial print cycle.7. A method for maintaining print quality of images printed ...

ELECTROSTATIC LATENT IMAGE DEVELOPING TONER

An electrostatic latent image developing toner includes a plurality of toner particles each including a core and a shell layer. The shell layer includes a first domain that is a non-crosslinked resin film and second domains that are crosslinked resin particles. The crosslinked resin has a higher glass transition point than the non-crosslinked resin. In a cross-sectional image of a toner particle, a proportion of a total length of a surface region of the core covered by the first domain is at least 45% and no greater than 80% relative to a circumferential length of the core. In a cross-sectional image of a toner particle, a proportion of second domains adhering to a surface of the first domain is at least 30% by number and no greater than 70% by number relative to all the second domains included in the toner particle. 1. An electrostatic latent image developing toner comprising a plurality of toner particles each including a core and a shell layer disposed over a surface of the core , whereinthe shell layer includes at least one first domain having a film shape and second domains each having a particle shape,the at least one first domain is substantially formed from a non-crosslinked resin and the second domains are substantially formed from a crosslinked resin,the crosslinked resin has a higher glass transition point than the non-crosslinked resin,in a cross-sectional image of one of the plurality of toner particles, a proportion of a total length of at least one surface region of the core covered by the at least one first domain is at least 45% and no greater than 80% relative to a circumferential length of the core, andin a cross-sectional image of one of the plurality of toner particles, a proportion of second domains adhering to a surface of the at least one first domain is at least 30% by number and no greater than 70% by number relative to all the second domains included in the toner particle.2. The electrostatic latent image developing toner according to ...

BRIGHT TONER, METHOD FOR PRODUCING BRIGHT TONER, AND IMAGE-FORMING APPARATUS

Provided here are toners and image forming apparatus and methods for the formation of a bright image with excellent brightness and concealability. A bright toner according to an embodiment comprises a plurality of toner particles containing a bright pigment and a binder resin, and has a volume particle diameter distribution with a coefficient of variation CV of 0.26 or more. 1. A bright toner comprising a plurality of toner particles containing a bright pigment and a binder resin , and having a volume particle diameter distribution with a coefficient of variation CV of 0.26 or more.2. The toner according to claim 1 , wherein the toner is a mixture comprising:a first toner which comprises a plurality of first toner particles containing a first bright pigment and a first binder resin, and has a first volume average particle diameter, anda second toner which comprises a plurality of second toner particles containing a second bright pigment and a second binder resin, and has a second volume average particle diameter, wherein the ratio of the second volume average particle diameter to the first volume average particle diameter is 1.10 or more,wherein the ratio of the amount of the second toner to the total amount of the first toner and the second toner is within the range of 30 to 90 mass %.3. The toner according to claim 1 , wherein the bright pigments in the plurality of toner particles exhibit brightness on the same principle.4. The toner according to claim 3 , wherein the bright pigments each exhibits metallic luster.5. The toner according to claim 3 , wherein the bright pigments each exhibits pearly luster.6. The toner according to claim 1 , wherein the bright toner has a volume particle diameter distribution with a coefficient of variation CV of 0.30 or less.7. The toner according to claim 1 , wherein the bright toner has a volume particle diameter distribution with a coefficient of variation CV of 0.27 to 0.29.8. The toner according to claim 1 , wherein the volume ...

TONER SET, IMAGE FORMING METHOD, AND IMAGE FORMING APPARATUS

Provided here are toner sets and image forming apparatus and methods for the formation of a bright image with excellent brightness and concealability. A toner set according to an embodiment comprises a first toner which is stored in a first container and comprises a plurality of first toner particles containing a first bright pigment and a first binder resin, and a second toner which is stored in a second container and comprises a plurality of second toner particles containing a second bright pigment and a second binder resin, wherein the second toner has a larger volume average particle diameter than the first toner. 1. A toner set comprising:a first toner which is stored in a first container and comprises a plurality of first toner particles containing a first bright pigment and a first binder resin; anda second toner which is stored in a second container and comprises a plurality of second toner particles containing a second bright pigment and a second binder resin, wherein the second toner has a larger volume average particle diameter than the first toner.2. The toner set according to claim 1 , wherein the ratio of the volume average particle diameter of the second toner to the volume average particle diameter of the first toner is within the range of 1.01 to 10.00.3. The toner set according to claim 1 , wherein the ratio of the volume average particle diameter of the second toner to the volume average particle diameter of the first toner is within the range of 1.10 to 2.0.4. The toner set according to claim 1 , wherein the ratio of the volume average particle diameter of the second toner to the volume average particle diameter of the first toner is within the range of 1.11 to 1.34.5. The toner set according to claim 1 , wherein the volume average particle diameter of the first toner is within the range of 6 to 20 μm.6. The toner set according to claim 1 , wherein the volume average particle diameter of the first toner is within the range of 10 to 16 μm.7. The ...

TONER, IMAGE FORMING METHOD, IMAGE FORMING APPARATUS, AND PROCESS CARTRIDGE

Provided is a toner including a binder resin, a release agent, and a charge-controlling agent, wherein the toner includes toner particles having particle diameters of 3 micrometers or smaller, among the toner particles having particle diameters of 3 micrometers or smaller, a proportion of the toner particles having an average circularity of 0.70 or greater but 0.85 or less in all of the toner particles is 10% by number or greater but less than 20% by number and a proportion of the toner particles having an average circularity of less than 0.70 in all of the toner particles is 10% by number or less. 1. A toner comprising:a binder resin;a release agent; anda charge-controlling agent,wherein the toner includes toner particles having particle diameters of 3 micrometers or smaller,among the toner particles having particle diameters of 3 micrometers or smaller, a proportion of the toner particles having an average circularity of 0.70 or greater but 0.85 or less in all of the toner particles is 10% by number or greater but less than 20% by number and a proportion of the toner particles having an average circularity of less than 0.70 in all of the toner particles is 10% by number or less.2. The toner according to claim 1 ,wherein among the toner particles having particle diameters of 3 micrometers or smaller, the proportion of the toner particles having the average circularity of less than 0.70 in all of the toner particles is 5% by number or less.3. The toner according to claim 1 ,wherein an amount of the charge-controlling agent relative to 100 parts by mass of the binder resin is 0.5 parts by mass or greater but 3.0 parts by mass or less, and a surface-exposed ratio of the charge-controlling agent relative to the binder resin is 0.02% or greater but 0.07% or less.4. The toner according to claim 1 ,wherein an amount of the release agent relative to 100 parts by mass of the binder resin is 1.0 parts by mass or greater but 6.0 parts by mass or less, and a surface-exposed ...

Transparent electrostatic charge image developing toner, method of manufacturing the same, electrostatic charge image developer, toner cartridge, image forming method, and image forming apparatus

A transparent electrostatic charge image developing toner includes a binder resin and a compound represented by the following Formula (1): wherein in Formula (1), R 1 represents a methyl group or a trifluoromethyl group; R 2 represents a hydrogen atom; R 3 represents a methyl group, a trifluoromethyl group, a t-butyl group, a phenyl group, or a naphthyl group; and M represents a rare earth element.

Toner

Provided is a toner having high charging rapidity to reach a sufficient charging amount in a short time, high stability of charging from the initial stage to a time when a large amount of sheets is printed out, and high stability of charging under a high temperature and high humidity. In a toner including toner particles, each of which contains at least a binder resin, a colorant, and a charge controlling resin, the charge controlling resin is a copolymer of a structure A having at least a specific salicylic acid derivative structure and a structure B having sulfonic acid or sulfonic acid ester as a substituent.

LATEX COMPRISING COLORANT AND METHODS OF MAKING THE SAME

A process includes forming an emulsion comprising a monomer and a colorant, the colorant further including an anionic functional group and a lipophilic counter ion, and polymerizing the monomer to form a latex, the latex includes polymer nanoparticles having the colorant dispersed therein. 1. A latex comprising copolymer nanoparticles having an organic colorant comprising an anionic functional group and a lipophilic counter ion dispersed within a matrix of the copolymer nanoparticles.2. The latex of claim 1 , wherein the copolymer nanoparticles comprise styrene-acrylate copolymer.3. The latex of claim 2 , wherein a ratio of styrene to acrylate is in a range from about 40:60 to 98:2.4. The latex of claim 1 , wherein the organic colorant comprises a modified pigment that comprises an indigo.5. The latex of claim 1 , wherein the organic colorant is covalently bound to the matrix of the copolymer nanoparticles.6. The latex of claim 1 , wherein the anionic functional group is selected from the group consisting of a sulfonate claim 1 , a sulfate claim 1 , a carboxylate claim 1 , a phosphate claim 1 , and combinations thereof.7. The latex of claim 1 , wherein the lipophilic counter ion is a quaternary ammonium ion.8. The latex of further comprising an additive selected from the group consisting of a crosslinker claim 1 , a charge control agent claim 1 , a chain transfer agent claim 1 , a surfactant claim 1 , and combinations thereof.9. The latex of claim 1 , wherein the copolymer nanoparticles have an average diameter in a range from about 50 nm to about 800 nm.10. The latex of claim 1 , wherein a loading of the organic colorant is in a range from about 0.1 to about 25 percent by weight of the latex.11. The latex of claim 1 , wherein the organic colorant comprises a modified pigment comprises an indigo.12. The latex of claim 1 , wherein the long chain aliphatic quaternary ammonium counterion comprises at least one unsaturation of the carbon in the counterion.13. A latex ...

ZIRCONIUM OXIDE TONER ADDITIVE

A toner composition includes toner particles and an additive disposed on an exterior surface of the toner particles, the additive includes uncoated zirconium oxide particles, the toner composition is substantially free of one or more rare earth compounds and the uncoated zirconium oxide particles are present in a sufficient amount to reduce bias charge roller contamination. 1. A toner composition comprising toner particles and an additive disposed on an exterior surface of the toner particles , the additive comprising uncoated zirconium oxide particles , wherein the toner composition is substantially free of one or more rare earth compounds and wherein the uncoated zirconium oxide particles are present in a sufficient amount to reduce bias charge roller contamination.2. The toner composition of claim 1 , wherein the uncoated zirconium oxide particles are present in a range of from about 0.25 weight percent to about 1.00 weight percent.3. The toner composition of claim 2 , wherein the uncoated zirconium oxide particles are present in a range of from about 0.30 weight percent to about 0.50 weight percent.4. The toner composition of claim 1 , wherein the uncoated zirconium oxide particles have an average particle size in a range of from about 0.2 microns to about 1.5 microns.5. The toner composition of claim 1 , wherein the uncoated zirconium oxide particles are irregular in shape or substantially spherical.6. The toner composition of claim 1 , wherein the toner particles are made by an emulsion/aggregation coalescence process.7. The toner composition of claim 1 , wherein the additives further comprise at least one of surface-treated silica claim 1 , surface-treated titania claim 1 , spacer particles claim 1 , and combinations thereof.8. The toner composition of claim 7 , wherein the surface-treated silica is present in an amount of from about 1.6 weight percent to about 2.8 weight percent based on the weight of the toner particle.9. The toner composition of claim 7 , ...

SILICON CARBIDE TONER ADDITIVE

A toner composition includes toner particles and an additive disposed on exterior surfaces of the toner particles, the additive includes uncoated silicon carbide particles, the toner composition is substantially free of one or more rare earth compound and the uncoated silicon carbide particles are present in a sufficient amount to reduce bias charge roller contamination. 1. A toner composition comprising toner particles and an additive disposed on exterior surfaces of the toner particles , the additive comprising uncoated silicon carbide particles , wherein the toner composition is substantially free of one or more rare earth compound and wherein the uncoated silicon carbide particles are present in a sufficient amount to reduce bias charge roller contamination.2. The toner composition of claim 1 , wherein the uncoated silicon carbide particles are present in a range of from about 0.10 weight percent to about 0.40 weight percent.3. The toner composition of claim 2 , wherein the uncoated silicon carbide particles are present in a range of from about 0.20 weight percent to about 0.30 weight percent.4. The toner composition of claim 1 , wherein the uncoated silicon carbide particles have an average particle size in a range of from about 0.2 microns to about 1.5 microns.5. The toner composition of claim 1 , wherein the uncoated silicon carbide particles are irregular in shape or substantially spherical.6. The toner composition of claim 1 , wherein the toner particles are made by an emulsion/aggregation coalescence process.7. The toner composition of claim 1 , wherein the additives further comprise at least one of surface-treated silica claim 1 , surface-treated titania claim 1 , spacer particles claim 1 , and combinations thereof.8. The toner composition of claim 7 , wherein the surface-treated silica is present in an amount of from about 1.6 weight percent to about 2.8 weight percent based on the weight of the toner particle.9. The toner composition of claim 7 , ...

Engineering-Grade Consumable Materials for Electrophotography-Based Additive Manufacturing

A part material for printing three-dimensional parts with an electrophotography-based additive manufacturing system, the part material including a composition having an engineering-grade thermoplastic material and a charge control agent. The part material is provided in a powder form having a controlled particle size, and is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the three-dimensional parts in a layer-by-layer manner. 1. A part material for printing three-dimensional parts with an electrophotography-based additive manufacturing system , the part material comprising: a thermoplastic material having a heat deflection temperature ranging from about 100° C. to about 150° C.; and', 'a charge control agent;, 'a composition comprisingwherein the part material is provided in a powder form having a D50 particle size ranging from about 5 micrometers to about 30 micrometers; andwherein the part material is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the three-dimensional parts in a layer-by-layer manner.2. The part material of claim 1 , wherein the composition further comprises a heat absorber claim 1 , wherein the heat absorber constitutes from about 0.5% by weight to about 10% by weight of the part material.3. The part material of claim 1 , wherein the D50 particle size ranges from about 10 micrometers to about 20 micrometers.4. The part material of claim 1 , wherein the powder form also has a D90/D50 particle size distribution and a D50/D10 particle size distribution each ranging from about 1.00 to about 1.40.5. The part material of claim 1 , wherein the charge control agent is selected from the group consisting of chromium oxy carboxylic acid complexes claim 1 , zinc oxy carboxylic acid complexes claim 1 , aluminum oxy carboxylic acid complexes claim 1 , and mixtures thereof.6. The part material of ...

High-Performance Consumable Materials for Electrophotography-Based Additive Manufacturing

A part material for printing three-dimensional parts with an electrophotography-based additive manufacturing system, the part material including a composition having a high-performance thermoplastic material and a charge control agent. The part material is provided in a powder form having a controlled particle size, and is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the three-dimensional parts in a layer-by-layer manner. 1. A part material for printing three-dimensional parts with an electrophotography-based additive manufacturing system , the part material comprising: a thermoplastic material having a heat deflection temperature greater than about 150° C.; and', 'a charge control agent;, 'a composition comprisingwherein the part material is provided in a powder form having a D50 particle size ranging from about 5 micrometers to about 30 micrometers; andwherein the part material is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the three-dimensional parts in a layer-by-layer manner.2. The part material of claim 1 , wherein the composition further comprises a heat absorber claim 1 , wherein the heat absorber constitutes from about 0.5% by weight to about 10% by weight of the part material.3. The part material of claim 1 , wherein the D50 particle size ranges from about 10 micrometers to about 20 micrometers.4. The part material of claim 1 , wherein the powder form also has a D90/D50 particle size distribution and a D50/D10 particle size distribution each ranging from about 1.00 to about 1.40.5. The part material of claim 1 , wherein the charge control agent is selected from the group consisting of chromium oxy carboxylic acid complexes claim 1 , zinc oxy carboxylic acid complexes claim 1 , aluminum oxy carboxylic acid complexes claim 1 , and mixtures thereof.6. The part material of claim 1 , wherein ...

Barium titanate toner additive

A toner composition includes toner particles and an additive disposed on an exterior surface of the toner particles, the additive includes uncoated barium titanate particles, the toner composition is substantially free of one or more rare earth compounds and the uncoated barium titanate particles are present in a sufficient amount to reduce bias charge roller contamination.

ELECTROSTATIC LATENT IMAGE-DEVELOPING TONER AND METHOD OF PRODUCING ELECTROSTATIC LATENT IMAGE-DEVELOPING TONER

An electrostatic latent image-developing toner includes a styrene-acrylic resin, an amorphous polyester resin, and a crystalline polyester resin. The electrostatic latent image-developing toner shows maximum absorption peaks at least in absorption wavenumber ranges of 690 to 710 cm, 1190 to 1220 cm, and 1230 to 1300 cmin an absorption spectrum measured by attenuated total reflection with a Fourier transform infrared spectrometer. The ratio (P3/P1) of the height (P3) of the maximum absorption peak in the range of 1230 to 1300 cmto the height (P1) of the maximum absorption peak in the range of 690 to 710 cmis 0.02 to 6.00. 1. An electrostatic latent image-developing toner comprising:a styrene-acrylic resin;an amorphous polyester resin; anda crystalline polyester resin,{'sup': −1', '−1', '−1, 'wherein the electrostatic latent image-developing toner shows maximum absorption peaks at least in absorption wavenumber ranges of 690 to 710 cm, 1190 to 1220 cm, and 1230 to 1300 cmin an absorption spectrum measured by attenuated total reflection with a Fourier transform infrared spectrometer, and'}{'sup': −1', '−1, 'the ratio (P3/P1) of the height (P3) of the maximum absorption peak in the range of 1230 to 1300 cmto the height (P1) of the maximum absorption peak in the range of 690 to 710 cmis 0.02 to 6.00.'}2. The electrostatic latent image-developing toner according to claim 1 , wherein the amount of the styrene-acrylic resin is in a range of 50% to 90% by mass based on the total amount of the resins contained in the electrostatic latent image-developing toner.3. The electrostatic latent image-developing toner according to claim 1 , wherein the ratio (P2/P1) of the height (P2) of the maximum absorption peak in the range of 1190 to 1220 cmto the height (P1) of the maximum absorption peak in the range of 690 to 710 cmis 0.20 or less.4. The electrostatic latent image-developing toner according to any one of claim 1 , wherein the ratio (P2/P1) of the height (P2) of the maximum ...

ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS

An electrostatic charge image developing toner includes toner particles containing crosslinked resin particles having a glass transition temperature of 55° C. or higher in a surface layer of the toner particle, and silica particles having a volume average particle diameter of 30 nm to 300 nm and a coverage with respect to the toner particle from 50% to 100%. 1. An electrostatic charge image developing toner comprising:toner particles containing crosslinked resin particles having a glass transition temperature of 55° C. or higher in a surface layer of the toner particle; andsilica particles having a volume average particle diameter of 30 nm to 300 nm and a coverage with respect to the toner particle from 50% to 100%.2. The electrostatic charge image developing toner according to claim 1 ,wherein an area ratio of an area of the crosslinked resin particles and an area excluding the area of the crosslinked resin particles (area of the crosslinked resin particles/area excluding the area of the crosslinked resin particles) in a cross section of the surface layer portion is from 0.1 to 0.5.3. The electrostatic charge image developing toner according to claim 1 ,wherein the toner particles further contain titania particles,a coverage of the silica particles with respect to the toner particle is from 10% to 90%, anda coverage of the titania particles with respect to the toner particle is from 10% to 50%.4. The electrostatic charge image developing toner according to claim 1 ,wherein the crosslinked resin particles are selected from a styrene crosslinked polymer, a (meth)acrylic crosslinked polymer, and a styrene-(meth)acrylic crosslinked polymer.5. The electrostatic charge image developing toner according to claim 1 ,wherein a glass transition temperature of the crosslinked resin particles is from 60° C. to 65° C.6. The electrostatic charge image developing toner according to claim 1 ,wherein a volume average particle diameter of the crosslinked resin particles is from 70 nm ...

ELECTROSTATIC LATENT IMAGE DEVELOPING TONER

A composite core of a toner particle is a composite of a toner core containing a polyester resin and a plurality of resin particles each containing a first resin. A shell layer partially covering a surface of the composite core is a film containing a second resin. The first resin has a glass transition point that is 10° C. or more higher than a glass transition point of the second resin. The plurality of resin particles each have a particle diameter that is 1.5 times or more greater than a thickness of the shell layer. An amount of the resin particles is at least 0.3 parts by mass and no greater than 2.0 parts by mass relative to 100 parts by mass of the toner cores. The resin particles have a positive zeta potential at pH 4. 1. An electrostatic latent image developing toner comprising:a plurality of toner particles each including a composite core and a shell layer partially covering a surface of the composite core, whereinthe composite core is a composite of a toner core containing a polyester resin and a plurality of resin particles each containing a first resin,the plurality of resin particles each adhere to a surface of the toner core,the shell layer is a film containing a second resin,the first resin has a glass transition point that is 10° C. or more higher than a glass transition point of the second resin,the plurality of resin particles each have a particle diameter that is 1.5 times or more greater than a thickness of the shell layer,an amount of the resin particles is at least 0.3 parts by mass and no greater than 2.0 parts by mass relative to 100 parts by mass of the toner cores, andthe resin particles have a positive zeta potential at pH 4 measured by laser Doppler electrophoresis.2. The electrostatic latent image developing toner according to claim 1 , whereinthe shell layer selectively covers a surface region of the composite core where the resin particles are not present.3. The electrostatic latent image developing toner according to claim 1 , ...

DEVELOPER, DEVELOPER CARTRIDGE, DEVELOPING DEVICE AND IMAGE FORMING APPARATUS

A developer including a colored resin particle and an external additive added to a surface of the colored resin particle and having a diameter smaller than or equal to 200 nm is provided. The external additive includes a nitrogen-containing resin particle. In elemental analysis of the nitrogen-containing resin particle, a peak appearing in a range of 0.38-0.42 keV is expressed as an N-peak, and a peak appearing in a range of 0.48-0.52 keV is expressed as an O-peak. Maximum count numbers in the N-peak and the O-peak of the external additive on a surface of the colored resin particle are respectively expressed as N1 and O1. Maximum count numbers in the N-peak and the O-peak of the surface of the colored resin particle where no external additive is observed are respectively expressed as N2 and O2. The count numbers N1, O1, N2 and O2 satisfy 1.7×(N2/O2)<(N1/O1). 1. A developer comprising:a colored resin particle; andan external additive added to a surface of the colored resin particle and having a diameter smaller than or equal to 200 [nm], the external additive comprising a nitrogen-containing resin particle,wherein, in elemental analysis of the nitrogen-containing resin particle, when a peak appearing in a range from 0.38 to 0.42 keV is expressed as an N-peak, a peak appearing in a range from 0.48 to 0.52 keV is expressed as an O-peak, a maximum count number in the N-peak and a maximum count number in the O-peak of the external additive on a surface of the colored resin particle are respectively expressed as N1 and O1, and a maximum count number in the N-peak and a maximum count number in the O-peak of the surface of the colored resin particle where no external additive is observed are respectively expressed as N2 and O2, the count numbers N1, O1, N2 and O2 satisfy 1.7×(N2/O2)<(N1/O1), andwherein the developer has a cohesion degree in a range from 63.7 to 80.9.2. The developer according to claim 1 , wherein the external additive comprises silica.3. The developer ...

TONER

Toner particles each contain a binder resin and a releasing agent. The releasing agent includes an ester mixture. The ester mixture includes an ester and a fatty acid. The ester includes at least one monoester. The monoester is a dehydration condensation product of a monovalent linear saturated carboxylic acid and a monovalent linear saturated alcohol. The fatty acid includes at least one monovalent linear saturated carboxylic acid. The fatty acid includes a monovalent linear saturated carboxylic acid having a carbon number of at least 14 and no greater than 24 but does not include a monovalent linear saturated carboxylic acid having a carbon number of less than 14 or a monovalent linear saturated carboxylic acid having a carbon number of greater than 24. The fatty acid has a melting point of 60° C. to 80° C. The fatty acid accounts for 5% by mass to 20% by mass of the ester mixture. 1. A toner comprising a plurality of toner particles , whereinthe toner particles each contain a binder resin and a releasing agent,the releasing agent includes an ester mixture,the ester mixture includes an ester and a fatty acid,the ester includes at least one monoester,the monoester is a dehydration condensation product of a monovalent linear saturated carboxylic acid and a monovalent linear saturated alcohol,the fatty acid includes at least one monovalent linear saturated carboxylic acid,the fatty acid includes a monovalent linear saturated carboxylic acid having a carbon number of at least 14 and no greater than 24 but includes neither a monovalent linear saturated carboxylic acid having a carbon number of less than 14 nor a monovalent linear saturated carboxylic acid having a carbon number of greater than 24,the fatty acid has a melting point of at least 60° C. and no greater than 80° C., andthe fatty acid accounts for at least 5% by mass and no greater than 20% by mass of the ester mixture.2. The toner according to claim 1 , whereinthe ester mixture has a solid point lower than a ...

TONER

A toner comprising a toner particle that contains a toner base particle and an organosilicon polymer on a surface of the toner base particle, wherein the organosilicon polymer forms protruded portions with a prescribed structure on the surface of the toner base particle, and in the toner cross section, when the protrusion width w is the length of the segment where a protruded portion and the toner base particle form a continuous interface, the protrusion diameter D is the maximum length of a protruded portion, and the protrusion height H is the length from the peak of the protruded portion to the line along the circumference of the toner base particle surface, the numerical proportion of these protruded portions having a ratio D/w of the protrusion diameter D to the protrusion width w from 0.33 to 0.80, is a least 70 number %. 2. The toner according to claim 1 , wherein claim 1 , in observation of the toner cross section using a scanning transmission electron microscope STEM claim 1 , assuming that the width of the flat image is taken as a circumference length L and the sum of the protrusion widths w of the protruded portions having a protrusion height H from 40 nm to 300 nm of the protruded portions of the organosilicon polymer present in the flat image is taken as Σw claim 1 , Σw/L is from 0.30 to 0.90.3. The toner according to claim 1 , wherein the fixing ratio of the organosilicon polymer on the toner is at least 80 mass %.4. The toner according to claim 1 , wherein H80 is at least 65 nm where claim 1 , when a cumulative distribution of the protrusion height H is constructed for the protruded portions having a protrusion height H from 40 nm to 300 nm claim 1 , H80 is the protrusion height corresponding to 80 number % for cumulation of the protrusion height H from the small side.5. The toner according to claim 1 , wherein R is an alkyl group having from 1 to 6 carbons. The present invention relates to the toner for developing the electrostatic charge image used ...

IMAGE-FORMING APPARATUS

A image-forming apparatus includes a plurality of process cartridges each having a toner and an image bearing member, and has an intermediate transfer member, wherein the toner comprises a toner particle that contains a toner base particle and a prescribed organosilicon polymer on the surface of the toner base particle, and the organosilicon polymer forms protruded portions on the surface of the toner base particle, for the protrusions having a protrusion height H from 40 nm to 300 nm, the numerical proportion P(D/w) of protruded portions having a ratio of the protrusion diameter D to the protrusion width w in a prescribed range is at least 70 number %, and one of the plurality of process cartridges has a carbon black-containing black toner, and the weight-average particle diameter of this black toner is smaller than that of the toner present in the other process cartridges. 2. The image-forming apparatus according to claim 1 , wherein claim 1 ,in observation of the toner cross section using a scanning transmission electron microscope STEM, assuming that the width of the flat image is taken as a circumference length L and the sum of the protrusion widths w of the protruded portions having a protrusion height H from 40 nm to 300 nm of the protruded portions of the organosilicon polymer present in the flat image is taken as Σw,Σw/L is from 0.30 to 0.90.3. The image-forming apparatus according to claim 1 , whereinthe fixing ratio of the organosilicon polymer on the toner is at least 80 mass %.4. The image-forming apparatus according to claim 1 , whereinthe black toner-containing process cartridge resides in the most downstream position among the plurality of process cartridges.5. The image-forming apparatus according to claim 1 , whereinthe difference between the weight-average particle diameter of the black toner and the weight-average particle diameter of the toner present in the other process cartridges is not greater than 1.5 μm.6. The image-forming apparatus ...

TONER, TONER STORAGE UNIT, AND IMAGE FORMING APPARATUS

A toner is provided. The toner comprises a binder resin, a metal-containing azo dye, and a quaternary ammonium salt, has an average circularity of from 0.85 to 0.95, and is free of a tin compound having Sn—C bond. 1. A toner comprising:a binder resin;a metal-containing azo dye; anda quaternary ammonium salt,wherein the toner has an average circularity of from 0.85 to 0.95,wherein the toner is free of a tin compound having Sn—C bond.2. The toner according to claim 1 , further comprising a silica containing a silicone oil claim 1 , the silica having a median diameter of from 10 to 80 nm.3. A toner storage unit comprising:a container; and{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the toner according to stored in the container.'}4. An image forming apparatus comprising:an electrostatic latent image bearer;an electrostatic latent image forming device configured to form an electrostatic latent image on the electrostatic latent image bearer;{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'a developing device containing the toner according to , configured to develop the electrostatic latent image formed on the electrostatic latent image bearer with the toner to form a toner image;'}a transfer device configured to transfer the toner image formed on the electrostatic latent image bearer onto a surface of a recording medium; anda fixing device configured to fix the toner image on the surface of the recording medium. This patent application is based on and claims priority pursuant to 35 U.S.C. § 119(a) to Japanese Patent Application No. 2018-134712, filed on Jul. 18, 2018, in the Japan Patent Office, the entire disclosure of which is hereby incorporated by reference herein.The present disclosure relates to a toner, a toner storage unit, and an image forming apparatus.Image forming apparatuses such as multifunction peripherals (MFPs) and printers using toner are widely used in various places such as offices. As opportunities to use the toner are expanded, demands for ...

TONER

A toner containing a toner particle, wherein, when a dielectric loss tangent measured at a frequency of 10 kHz in an impedance measurement on the toner in an environment having a temperature of 50° C. and a relative humidity of 50% RH is designated by tan δ50° C.(1), and a dielectric loss tangent measured at a frequency of 10 kHz in an impedance measurement on the toner in an environment having a temperature of 30° C. and a relative humidity of 50% RH after the impedance measurement on the toner in an environment having a temperature of 50° C. and a relative humidity of 50% RH is designated by tan δ30° C.(2), tan δ50° C.(1) is from 0.015 to 0.050, the relationship tan δ50° C.(1)>tan δ30° C.(2) is satisfied, and tan δ30° C.(2)/tan δ50° C.(1) is from 0.25 to 0.66. 1. A toner containing a toner particle , wherein ,when a dielectric loss tangent measured at a frequency of 10 kHz in an impedance measurement on the toner in an environment having a temperature of 50° C. and a relative humidity of 50% RH is designated by tan δ50° C.(1), anda dielectric loss tangent measured at a frequency of 10 kHz in an impedance measurement on the toner in an environment having a temperature of 30° C. and a relative humidity of 50% RH after the impedance measurement on the toner in an environment having a temperature of 50° C. and a relative humidity of 50% RH is designated by tan δ30° C.(2),tan δ50° C.(1) is from 0.015 to 0.050,tan δ50° C.(1) and tan δ30° C.(2) satisfy the relationship tan δ50° C.(1)>tan δ30° C.(2), anda ratio of tan δ30° C.(2) to tan δ50° C.(1) is from 0.25 to 0.66.2. The toner according to claim 1 , wherein the toner includes claim 1 , on a surface of the toner particle claim 1 ,fine particles B1 and fine particles A that contain a metal element-containing compound,the fine particles B1 have a number-average particle diameter DB of from 50 nm to 500 nm,a percentage occurrence of the metal element in measurement of a surface of the toner using X-ray photoelectron ...

TONER

A toner comprising a toner particle, wherein the toner has G1 of from 5.0×10to 1.0×10, and a ratio G2/G1 of G2 to G1 is from 0.10 to 0.60, when a conductivity of the toner measured at a frequency of 0.01 Hz under a pressure of 1,000 kPa is designated by G1 in S/m, and a conductivity of the toner measured at a frequency of 0.01 Hz under a pressure of 100 kPa is designated by G2 in S/m. 1. A toner comprising a toner particle , wherein ,when a conductivity of the toner measured at a frequency of 0.01 Hz under a pressure of 1,000 kPa is designated by G1 in S/m, anda conductivity of the toner measured at a frequency of 0.01 Hz under a pressure of 100 kPa is designated by G2 in S/m,{'sup': −13', '−10, 'the toner has G1 of from 5.0×10to 1.0×10, and'}a ratio G2/G1 of G2 to G1 is from 0.10 to 0.60.2. The toner according to claim 1 , wherein the toner has G2 of from 1.0×10to 2.0×10.3. The toner according to claim 1 , wherein the toner includes claim 1 , on a surface of the toner particle claim 1 ,fine particles B1 and fine particles A that contain a metal element-containing compound,the fine particles B1 have a number-average particle diameter DB of from 50 nm to 500 nm, anda percentage occurrence of the metal element in measurement of a surface of the toner using X-ray photoelectron spectroscopy is from 5.0 atomic % to 10.0 atomic %.4. The toner according to claim 1 , wherein the toner particle includesa toner base particle and protruded portions B2 at a surface of the toner base particle, andat a surface of the toner particle, fine particles A that contain a metal element-containing compound,the protruded portions B2 have a number-average value of a protrusion height H of from 50 nm to 500 nm, anda percentage occurrence of the metal element in measurement of a surface of the toner using X-ray photoelectron spectroscopy is from 5.0 atomic % to 10.0 atomic %.5. The toner according to claim 1 , wherein the toner particle includesa toner base particle and protruded portions B2 ...

TONER, TWO-COMPONENT DEVELOPER, AND IMAGE FORMING METHOD

A toner has a weight-average particle diameter (D4) of 3.0 μm or more and 8.0 μm or less, wherein the average circularity analyzed by dividing particles of the toner having an equivalent circle diameter of 1.98 μm or more and less than 200.00 μm into 800 in a range of a circularity of 0.200 or more and 1.000 or less is 0.960 or more and 0.985 or less, the proportion of particles A having a circularity of 0.990 or more and 1.000 or less is 25.0% or less on a basis of the number of particles, and the ratio of particles B having an equivalent circle diameter of 0.50 μm or more and less than 1.98 μm to the total particles having an equivalent circle diameter of 0.50 μm or more and less than 200.00 μm is 10.0% or less on a basis of the number of particles. 1. A toner comprising:toner particles each of which contains a binder resin and a wax; andinorganic fine particles,wherein(i) the toner has a weight-average particle diameter (D4) of 3.0 μm or more and 8.0 μm or less, (a) regarding particles having an equivalent circle diameter of 1.98 μm or more and less than 200.00 μm, the average circularity of the toner is 0.960 or more and 0.985 or less, and the proportion of particles having a circularity of 0.990 or more and 1.000 or less is 25.0% or less on a basis of the number of particles, and', '(b) the ratio of particles having an equivalent circle diameter of 0.50 μm or more and less than 1.98 μm to particles having an equivalent circle diameter of 0.50 μm or more and less than 200.00 μm is 10.0% or less on a basis of the number of particles, and, '(ii) in a measurement using a flow particle image measuring apparatus with an image processing resolution of 512×512 pixels, the toner satisfies the following conditions (a) and (b) {'br': None, 'i': ≦P', '/P, '1.2012≦2.00\u2003\u2003Formula (1)'}, '(iii) the relationship of formula (1) is satisfiedwhere P1=Pa/Pb and P2=Pc/Pd,{'sup': −1', '−1', '−1', '−1, 'Pa and Pb respectively represent a maximum absorption peak intensity in ...

LATEX COMPRISING COLORANT AND METHODS OF MAKING THE SAME

A process includes forming an emulsion comprising a monomer and a colorant, the colorant further including an anionic functional group and a lipophilic counter ion, and polymerizing the monomer to form a latex, the latex includes polymer nanoparticles having the colorant dispersed therein. 1. A process comprising:forming an emulsion comprising a monomer and a colorant, the colorant further comprising an anionic functional group and a lipophilic counter ion; andpolymerizing the monomer to form a latex, the latex comprising polymer nanoparticles having the colorant dispersed therein.2. The process of claim 1 , wherein the monomer is selected from the group consisting of a styrene claim 1 , an acrylate claim 1 , a methacrylate claim 1 , a butadiene claim 1 , an isoprene claim 1 , an acrylic acid claim 1 , a methacrylic acid claim 1 , an acrylonitrile claim 1 , and combinations thereof.3. The process of claim 1 , wherein the anionic functional group is selected from the group consisting of a sulfonate claim 1 , a sulfate claim 1 , a carboxylate claim 1 , a phosphate claim 1 , and combinations thereof.4. The process of claim 1 , wherein the lipophilic counter ion is a quaternary ammonium ion.5. The process of claim 1 , wherein the emulsion further comprises an additive selected from the group consisting of a crosslinker claim 1 , a charge control agent claim 1 , a chain transfer agent claim 1 , a surfactant claim 1 , and combinations thereof.6. The process of claim 1 , wherein the polymer nanoparticles have an average diameter in a range from about 50 nm to about 800 nm.7. The process of claim 1 , wherein a loading of the colorant is in a range from about 0.1 to about 25 percent by weight.8. The process of claim 1 , wherein forming the latex comprises a starve-fed polymerization.9. The process of claim 1 , further comprising forming toner particles from the latex.10. A process comprising:forming an emulsion comprising an acrylate monomer, a styrene monomer, and a ...

Toner Compositions

The present disclosure provides processes for producing toners by emulsion aggregation where the resulting toner particles have high pigment loadings and desired circularity. The methods include adding a metal, in embodiments a metal salt, at the beginning of coalescence, which surprisingly speeds the coalescence process and produces toner particles having a desired size and circularity for use in electrophotographic imaging systems. 120-. (canceled)21. A process comprising:a) contacting a resin comprising at least two monomers selected from acrylate monomers, styrene monomers and combinations thereof with a colorant, a surfactant and an optional wax to form an emulsion;b) contacting said emulsion with a coagulant;c) adding a transition metal powder or a transition metal salt, wherein said transition metal is copper, zinc, iron, cobalt, nickel, molybdenum, manganese, chromium, vanadium, titanium or alloys thereof, to the emulsion of step b) comprising said coagulant;d) coalescing the emulsion of step c) comprising said transition metal powder or said transition metal salt over a period of time from about 0.5 hours to about 3.5 hours to form toner; ande) recovering said toner.22. The process according to claim 21 , wherein said resin comprises poly(styrene-alkyl acrylate) claim 21 , poly (styrene-alkyl acrylate-acrylic acid) claim 21 , poly(styrene-alkyl methacrylate-acrylic acid) claim 21 , poly(alkyl methacrylate-alkyl acrylate) claim 21 , poly(alkyl methacrylate-aryl acrylate) claim 21 , poly(aryl methacrylate-alkyl acrylate) claim 21 , poly(alkyl methacrylate-acrylic acid) claim 21 , poly(styrene-alkyl acrylate-acrylonitrile-acrylic acid) claim 21 , poly(alkyl acrylate-acrylonitrile-acrylic acid) claim 21 , poly(styrene-butadiene) claim 21 , poly(methylstyrene-butadiene) claim 21 , poly(methyl methacrylate-butadiene) claim 21 , poly(ethyl methacrylate-butadiene) claim 21 , poly(propyl methacrylate-butadiene) claim 21 , poly(butyl methacrylate-butadiene) claim 21 ...

SUSPENSION POLYMERIZATION TONER OF CORE-SHELL STRUCTURE WITH DENSE CHARGES AND PREPARATION METHOD

Suspension polymerization toner of a core-shell structure with dense charges comprises core-shell composite particles prepared by mixing suspension dispersion liquid of toner core particles with shell monomer emulsion and resin-type CCA dispersion liquid, and carrying out a polymerization reaction to form rigid shell layers with dense charges coated on the soft toner core particles. A preparation method thereof comprises: mixing a low-Tg monomer oil phase forming toner core particles with aqueous dispersion liquid, carrying out a heating polymerization reaction after suspension granulation to convert monomer oil droplet particles to polymer particles, and obtaining soft toner core particles; adding a high-Tg shell monomer forming rigid shell layers into water containing a surfactant to form emulsion, adding the emulsion and CCA dispersion liquid into suspension dispersion liquid of the soft toner core particles for second polymerization after mixing, and cleaning, filtering, drying and performing additive treatment. 1. A suspension polymerization toner of core-shell structure with dense charges , comprising core-shell composite particles prepared by mixing suspension dispersion liquid of soft toner core particles with a shell monomer emulsion and resin-type CCA dispersion liquid , and carrying out a polymerization reaction to form a rigid shell layer with dense charges coated on soft toner core particles.2. The suspension polymerization toner of core-shell structure with dense charges of claim 1 , wherein a weight ratio of the rigid shell layer of the core-shell composite particles and the soft core particles is 20:80-1:99; an average thickness of the rigid shell layer is 0.05-0.2 μm; and a coverage ratio of the rigid shell layer on a surface of the soft core particles is greater than 50%.3. The suspension polymerization toner of core-shell structure with dense charges of claim 1 , wherein an average particle diameter of the core-shell composite particles is 5-10 μm ...

TONER

A toner includes a plurality of toner particles each including a core and a shell layer disposed over a surface of the core. The shell layers include a resin containing a unit derived from a thermoplastic resin and a unit derived from a monomer or prepolymer of a thermosetting resin. The toner has an average roundness of no less than 0.965 and no greater than 0.975. The toner contains less than 0.5% by number of toner particles having a roundness of no greater than 0.85. The toner has a displacement rate of no less than 0.50% and no greater than 0.70% as measured in a micro-compression test that is performed on the toner under specified conditions. 1. A toner comprising a plurality of toner particles each including a core and a shell layer disposed over a surface of the core , whereinthe shell layers include a resin containing a unit derived from a thermoplastic resin and a unit derived from a monomer or prepolymer of a thermosetting resin,the toner has an average roundness of no less than 0.965 and no greater than 0.975,the toner contains less than 0.5% by number of toner particles having a roundness of no greater than 0.85, andthe toner has a displacement rate represented by the equation “toner displacement rate=100×Z1/Z2” of no less than 0.50% and no greater than 0.70% as measured in a micro-compression test on the toner, where: Z1 is an amount of displacement of the toner particles when subjected to load at a load rate of 60 nN/s until the load reaches a maximum load of 60 nN, and then left to stand for one second at the maximum load in an environment at a temperature of 23° C. and a relative humidity of 50%; and Z2 is a particle size of the toner particles.2. The toner according to claim 1 , whereinthe toner contains no greater than 0.3% by number of toner particles having a roundness of no greater than 0.85.3. The toner according to claim 1 , whereinthe resin included in the shell layers contains, as the unit derived from a monomer or prepolymer of a ...

CARRIER CORE PARTICLES FOR ELECTROPHOTOGRAPHIC DEVELOPER, CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPER, AND ELECTROPHOTOGRAPHIC DEVELOPER

A method for manufacturing carrier core particles for electrophotographic developer that include manganese, magnesium, and iron as a core composition. The method includes a granulation step (A) of granulating a mixture of raw materials containing manganese, magnesium, and iron with a reducing agent added at a ratio of 0.10% to 1.00% by mass to a total mass of the raw materials containing manganese, magnesium, and iron, and a firing step of firing the granular material granulated in the granulation step. The firing step includes a first heating step (C) of applying heat at a constant temperature ranging from 500° C. to 800° C. in an atmosphere with an oxygen concentration of 1000 ppm to 15000 ppm for a predetermined period of time and a second heating step (D) of applying heat at a temperature higher than 800° C. for a predetermined period of time after the first heating step. 15-. (canceled)6. Carrier core particles for electrophotographic developer including consisting of calcium , manganese , magnesium , iron , and oxygen as a core composition , wherein{'sup': 3', '3', '2', '2, 'the carrier core particles have a pore volume of from 0.005 cm/g to 0.020 cm/g and a BET specific surface area of from 0.140 m/g to 0.230 m/g.'}7. The carrier core particles for electrophotographic developer according to claim 6 , wherein when the carrier core particles are pulverized and the true density of the carrier core particles before pulverization is expressed by ρ1 and the true density of the carrier core particles after pulverization is expressed by ρ2 claim 6 , the volume porosity P calculated by P(%)=(ρ2-ρ1)×100/ρ2 is 4.5% or lower.8. (canceled)9. (canceled)10. Carrier for electrophotographic developer used in electrophotographic developer claim 6 , comprising:{'claim-ref': {'@idref': 'CLM-00006', 'claim 6'}, 'the carrier core particles for electrophotographic developer cited in ; and'}resin that coats the surface of the carrier core particles for electrophotographic developer. ...

SOLVENT FREE EMULSIFICATION PROCESSES

Provided is an emulsion that includes a water phase and a resin containing phase. The emulsion is prepared from a mixture comprising water, a surfactant, a resin that includes an acidic moiety, and an organic compound having at least two different moieties. Each of the two moieties have a single functionality or dual functionality. The single functionality and the dual functionality are selected from a capability to neutralize the acidic moiety of the resin, a capability to form a hydrogen bond, or both. 1. An emulsion comprising:a water phase and a resin containing phase, water,', 'a surfactant,', 'a resin comprising an acidic moiety, and', 'an organic compound comprising at least two different moieties, each of the two moieties having a single functionality or dual functionality, and, 'wherein the emulsion is prepared from a mixture comprising'}wherein the single functionality and the dual functionality are selected from a capability to neutralize the acidic moiety of the resin, a capability to form a hydrogen bond, or both.2. The emulsion of claim 1 , wherein the emulsion is free of an organic solvent.3. The emulsion of claim 1 , wherein the at least two different moieties comprise a hydroxyl group claim 1 , a nitrogen containing moiety claim 1 , or mixtures thereof.4. The emulsion of claim 1 , wherein the surfactant is present in a concentration of from about 2% to about 4% by weight of the resin.5. A process comprising: a surfactant,', 'a resin comprising an acidic moiety, and', 'an organic compound comprising at least two different moieties, each of the two moieties having a single functionality or dual functionality,', 'wherein the single functionality and the dual functionality are selected from a capability to neutralize the acidic moiety of the resin, a capability to form a hydrogen bond, or both;, 'melt mixing a mixture comprising'} a first disperse phase and', 'a first continuous phase,', 'wherein the first disperse phase comprises the water and the ...

TONER AND METHOD FOR MANUFACTURING THE SAME

A toner includes toner particles which contain a binder resin, a colorant, a wax, and a resin A having an organic polysiloxane structure; the amount of Si atoms of the toner particles is 4.5 to 10.0; in an analysis of a cross-section of each toner particle, in a surface layer region R from the periphery of the cross-section of the toner particle to the inside at a distance of 10.0% of the particle diameter in the cross-section of the toner particle, the content of Si atoms derived from the organic polysiloxane structure is 90.0% or more with respect to the total amount of Si atoms contained in the toner particle; and in a line analysis along a straight line between the periphery of the surface layer region R and a gravity center of the cross-section, an intensity count of Si atoms in the toner particle satisfies formula Si>Si>Si>Si≧0. 1. A toner comprising:toner particles which contain a binder resin, a colorant, a wax, and a resin A having an organic polysiloxane structure,wherein the amount (atomic %) of Si atoms of the toner particles measured by an X-ray photoelectron spectroscopy (XPS) is 4.5 to 10.0,in an analysis using an energy dispersive X-ray spectrometer (EDS) performed on a cross-section of each toner particle observed by a transmission electron microscope,in a surface layer region R from the periphery of the cross-section of the toner particle to the inside at a distance of 10.0% of the particle diameter in the cross-section of the toner particle, the content of Si atoms derived from the organic polysiloxane structure is 90.0% or more with respect to the total amount of Si atoms contained in the toner particle, andin a line analysis along a straight line between the periphery of the surface layer region R and a gravity center of the cross-section, {'br': None, 'sup': 0', '1', '2', '3, 'Si>Si>Si>Si≧0\u2003\u2003(1)'}, 'an intensity count of Si atoms in the toner particle satisfies the following formula (1)'}wherein in the formula (1),{'sup': 0', '0, ' ...

TONER

Provided is a toner including a toner particle containing an amorphous resin, a colorant, a release agent, and a crystalline resin, wherein, when ηrepresents the extensional viscosity of the toner at a Hencky strain at 90° C. of 0.01 and ηrepresents the extensional viscosity of the toner at a Hencky strain at 90° C. of 0.69, ηand ηsatisfy the relationships of the following formulas (1) and (2): 1. A toner comprising a toner particle containing an amorphous resin , a colorant , a release agent , and a crystalline resin , wherein{'sub': 0.01', '0.69', '0.01', '0.69, 'claim-text': [{'br': None, 'sup': 4', '5, 'sub': '0.01', '3.0×10Pa≦η≦2.0×10Pa\u2003\u2003formula (1)'}, {'br': None, 'sub': 0.69', '0.01, '2.0≦[η/η].\u2003\u2003formula (2)'}], 'when ηrepresents the extensional viscosity of the toner at a Hencky strain at 90° C. of 0.01 and ηrepresents the extensional viscosity of the toner at a Hencky strain at 90° C. of 0.69, ηand ηsatisfy the relationships of the following formulas (1) and (2)2. The toner according to claim 1 , wherein ηsatisfies the relationship 1.0×10Pa≦η≦4.0×10Pa.3. The toner according to claim 1 , wherein the amorphous resin contains an amorphous polyester resin A claim 1 , and{'sub': 0.01(A)', '0.69(A)', '0.01(A)', '0.69(A), 'claim-text': [{'br': None, 'sup': 5', '5, 'sub': '0.01(A)', '2.5×10Pa≦η≦7.5×10Pa\u2003\u2003formula (3)'}, {'br': None, 'sub': 0.69(A)', '0.01(A), '3.0≦[η/η].\u2003\u2003formula (4)'}], 'when ηrepresents the extensional viscosity of the amorphous polyester resin A at a Hencky strain at 90° C. of 0.01 and ηrepresents the extensional viscosity of the amorphous polyester resin A at a Hencky strain at 90° C. of 0.69, ηand ηsatisfy the relationships of the following formulas (3) and (4)4. The toner according to claim 3 , wherein ηsatisfies the relationship 1.0×10Pa≦η≦2.0×10Pa.5. The toner according to claim 3 , wherein the content of the amorphous polyester resin A in the toner is at least 40.0 mass % and not more than 70.0 mass ...

TONER AND METHOD FOR MANUFACTURING THE SAME

A toner in which the content of polysiloxane is 1% by mass or more and 15% by mass or less based on the total mass of toner particles, the polysiloxane is present in the toner as a domain of 10 nm or more and 500 nm or less, and Siloxane index (Ge)/Siloxane index (D) of the toner particles is 1.0 or less. 2. The toner according to claim 1 , whereineach of the toner particles further contain wax, and the wax is aliphatic hydrocarbon.3. The toner according to claim 1 , whereinthe binding resin is an amorphous polyester.4. The toner according to claim 1 , whereineach of the toner particles further contain a crystalline polyester.5. The toner according to claim 1 , whereinwhen the content of the polysiloxane in the toner particles is defined as X, and the ratio of the siloxane index (Ge) to the siloxane index (D) is defined as Y, product (X×Y) is 1.0 or more and 5.0 or less.6. The toner according to claim 1 , whereinan average circularity of the toner particles is 0.90 or more and 0.97 or less.7. The toner according to claim 1 , whereinthe toner particles have fine concavities and convexities of 100 nm or more and 500 nm or less on a surface of the toner particles.8. A method for manufacturing a toner comprising:emulsifying polysiloxane in an aqueous medium to obtain a emulsion liquid of emulsified particles of the polysiloxane;dispersing a binding resin in an aqueous medium to obtain a dispersion liquid of resin fine particles;mixing the emulsion liquid of the emulsified particles of the polysiloxane and the dispersion liquid of the resin fine particles; andaggregating the emulsified particles of the polysiloxane and the resin fine particles to obtain toner particles, whereinthe toner particles contain a resin having an ester bond, a colorant, and polysiloxane,a content of the polysiloxane in the toner particles is 1 mass % or more and 15 mass % or less based on a total mass of the toner particles,a ratio (Siloxane index (Ge)/Siloxane index (D)) of a siloxane index (Ge ...

COLORABLE MATERIAL

According to one embodiment, a colorable material capable of achieving a high image density during coloration is provided. A colorable material according to an embodiment contains: colorable particles including porous particles as a color developing agent composed of an inorganic oxide and a color developable agent carried on the porous particles; and a thermoplastic resin coating the colorable particles. 1. A colorable material comprising:colorable particles including porous particles as a color developing agent comprising an inorganic oxide and a color developable agent carried on the porous particles; anda thermoplastic resin coating the colorable particles.2. The material according to claim 1 , wherein the colorable material has an average particle diameter from 0.1 to 20 μm.3. The material according to claim 1 , wherein the colorable material has an average particle diameter from 0.1 to 10 μm.4. The material according to claim 1 , wherein the colorable material has a BET specific surface area from 20 to 500 m/g.5. The material according to claim 1 , wherein the color developing agent has an average particle diameter of from 40 nm to 10 μm.6. The material according to claim 1 , wherein the color developable comprises an electron-donating color developable compound.7. The material according to claim 1 , wherein the color developing agent has a BET specific surface area from 30 to 700 m/g.8. The material according to claim 1 , wherein the thermoplastic resin comprises a polyester claim 1 , a styrenic resin claim 1 , an ethylenic resins claim 1 , a polyurethane-based resin claim 1 , an acrylic resin claim 1 , a phenolic resin claim 1 , an epoxy-based resin claim 1 , an allyl phthalate-based resin claim 1 , a polyamide-based resin claim 1 , or a maleic acid-based resin.9. The material according to claim 1 , wherein the thermoplastic resin has a glass transition temperature (Tg) of from 40 to 200° C.10. The material according to claim 9 , wherein the thermoplastic ...

TONER AND PRODUCTION METHOD THEREOF, AND TONER STORED UNIT, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD

A toner includes toner particles, each including: a toner base particle including a binder resin, a colorant, and wax; and resin particles on a surface of the toner base particle, wherein Formulae 1 to 3 below are satisfied, where M is a volume average primary particle diameter (nm) of the resin particles, and L is a distance (nm) between the resin particles present next to one another on the surface of the toner base particle: 1. A toner comprisingtoner particles, each comprising:a toner base particle including a binder resin, a colorant, and wax; andresin particles on a surface of the toner base particle, [{'br': None, 'i': 'M Подробнее

METHOD FOR PRODUCING CAPSULE TONER

A method for producing a capsule toner includes preparing core particles; preparing a shell fine particle dispersion liquid having a surface tension of 50 mN/m or more, as measured at 25° C., by dissolving a polyester resin in an organic solvent, thereafter performing neutralization with a neutralizer, and thereafter forming the polyester resin into fine particles; adjusting the surface tension of the shell fine particle dispersion liquid to less than 50 mN/m, as measured at 25° C., by adding a substance that does not include a surfactant to the shell fine particle dispersion liquid; and adhering the shell fine particle dispersion liquid to the surfaces of the core particles. The substance dissolves in or mixes with water and (i) has a vapor pressure equal to or greater than the vapor pressure of water or (ii) has a vapor pressure less than the vapor pressure of water and can be azeotropic with water. 1. A method for producing a capsule toner including core particles and a shell layer formed on surfaces of the core particles , the method comprising:preparing the core particles;preparing a shell fine particle dispersion liquid having a surface tension of 50 mN/m or more, as measured at 25° C., including (i) dissolving a polyester resin in an organic solvent, thereafter (ii) performing neutralization with a neutralizer, and thereafter (iii) forming the polyester resin into fine particles;adjusting the surface tension of the shell fine particle dispersion liquid to less than 50 mN/m, as measured at 25° C., by adding a substance that does not include a surfactant to the shell fine particle dispersion liquid, wherein the substance dissolves in or mixes with water and (i) has a vapor pressure equal to or greater than the vapor pressure of water or (ii) has a vapor pressure less than the vapor pressure of water and can be azeotropic with water; andadhering the shell fine particle dispersion liquid to the surfaces of the core particles.2. The method of claim 1 , wherein the ...

ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, AND TONER CARTRIDGE

An electrostatic charge image developing toner includes a toner particle; a strontium titanate particle that is externally added to the toner particle and that is doped with a metal element having an electronegativity of 1.3 or less; and a silica particle that is externally added to the toner particle, in which in a case where a detected peak intensity of a metal element having an electronegativity of 1.3 or less is Me-R, a detected peak intensity of strontium is Sr—R, a detected peak intensity of silicon is Si—R, and an element proportion of strontium is Sr—P, Conditions (1) to (3) are satisfied, 1. An electrostatic charge image developing toner comprising:a toner particle;a strontium titanate particle that is externally added to the toner particle and that is doped with a metal element having an electronegativity of 1.3 or less; anda silica particle that is externally added to the toner particle, [{'br': None, '0.08 kcps≤Me-R≤10 kcps,\u2003\u2003(1)'}, {'br': None, '0.1%≤Sr—P≤3.0%, and\u2003\u2003(2)'}, {'br': None, '0.15≤Sr—R/Si—R≤12.\u2003\u2003(3)'}], 'wherein, in a case where a detected peak intensity of the metal element having an electronegativity of 1.3 or less which is obtained by an X-ray fluorescence element analysis method is Me-R, a detected peak intensity of strontium which is obtained by an X-ray fluorescence element analysis method is Sr—R, a detected peak intensity of silicon which is obtained by an X-ray fluorescence element analysis method is Si—R, and an element proportion of strontium obtained by an X-ray photoelectron spectroscopy method is Sr—P, Conditions (1) to (3) are satisfied,'}2. The electrostatic charge image developing toner according to claim 1 , {'br': None, '0.04%≤Me-P≤0.7%.\u2003\u2003(4)'}, 'wherein, in a case where an element proportion of the metal element having an electronegativity of 1.3 or less which is obtained by an X-ray photoelectron spectroscopy method is Me-P, Condition (4) is satisfied,'}3. The electrostatic charge ...

ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, AND TONER CARTRIDGE

An electrostatic charge image developing toner includes a toner particle, a lubricant particle that is externally added to the toner particle, and a strontium titanate particle that is externally added to the toner particle, that has an average primary particle diameter of 10 nm or more and 100 nm or less, that has an average primary particle circularity of 0.82 or more and 0.94 or less, and that has a primary particle circularity that becomes 84% of accumulation of more than 0.92. 1. An electrostatic charge image developing toner comprising:a toner particle;a lubricant particle that is externally added to the toner particle; anda strontium titanate particle that is externally added to the toner particle, that has an average primary particle diameter of 10 nm or more and 100 nm or less, that has an average primary particle circularity of 0.82 or more and 0.94 or less, and that has a primary particle circularity that becomes 84% of accumulation of more than 0.92.2. The electrostatic charge image developing toner according to claim 1 ,wherein an average primary particle diameter of the strontium titanate particle is 20 nm or more and 80 nm or less.3. The electrostatic charge image developing toner according to claim 2 ,wherein an average primary particle diameter of the strontium titanate particle is 30 nm or more and 60 nm or less.4. The electrostatic charge image developing toner according to claim 1 ,wherein, in the strontium titanate particle, a half-width of a peak of a 110 plane obtained by an X-ray diffraction method is 0.2° or more and 1.0° or less.5. The electrostatic charge image developing toner according to claim 1 ,wherein a proportion of a particle that strongly adheres to the toner particle, among the strontium titanate particles is 70% or less.6. The electrostatic charge image developing toner according to claim 5 ,wherein the proportion of the particle that strongly adheres to the toner particle, among the strontium titanate particles is 50% or less.7 ...

ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER AND ELECTROSTATIC CHARGE IMAGE DEVELOPER

An electrostatic charge image developing toner includes: a toner particle and a strontium titanate particle that is externally added to the toner particle, in which an average primary particle diameter of the strontium titanate particle that is present on a surface of the toner particle is 30 nm or more and 100 nm or less, and average primary particle circularity is 0.82 or more and 0.94 or less, and in which circularity that becomes 84% of accumulation of the primary particle is greater than 0.92. 1. An electrostatic charge image developing toner comprising:a toner particle; anda strontium titanate particle that is externally added to the toner particle,wherein an average primary particle diameter of the strontium titanate particle that is present on a surface of the toner particle is 30 nm or more and 100 nm or less, and average primary particle circularity is 0.82 or more and 0.94 or less, andwherein circularity that becomes 84% of accumulation of the primary particle is greater than 0.92.2. The electrostatic charge image developing toner according to claim 1 ,wherein the strontium titanate particle that is present on the surface of the toner particle has a standard deviation of primary particle circularity of 0.04 or more and 2.0 or less.3. The electrostatic charge image developing toner according to claim 2 ,wherein the strontium titanate particle that is present on the surface of the toner particle has a standard deviation of primary particle circularity of 0.04 or more and 1.0 or less.4. The electrostatic charge image developing toner according to claim 1 ,wherein a moisture content of the strontium titanate particle is 1.5% or more and 10% or less.5. The electrostatic charge image developing toner according to claim 4 ,wherein a moisture content of the strontium titanate particle is 2% or more and 5% or less.6. The electrostatic charge image developing toner according to claim 1 ,wherein the strontium titanate particle has a hydrophobized surface.7. The ...

ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, AND TONER CARTRIDGE

An electrostatic charge image developing toner includes: a toner particle that contains a releasing agent, that has an exposed portion in which the releasing agent is exposed on a surface, and in which a proportion of the exposed portion occupying a surface, which is obtained by X-ray photoelectron spectroscopic analysis is 1 atom % or more and 20 atom % or less; and a strontium titanate particle that is externally added to the toner particle, that is doped with a metal element other than titanium and strontium, and in which an average primary particle diameter is 10 nm or more and 100 nm or less. 1. An electrostatic charge image developing toner comprising:a toner particle that contains a releasing agent, that has an exposed portion in which the releasing agent is exposed on a surface, and in which a proportion of the exposed portion occupying a surface, which is obtained by X-ray photoelectron spectroscopic analysis is 1 atom % or more to 20 atom % or less; anda strontium titanate particle that is externally added to the toner particle, that is doped with a metal element other than titanium and strontium, and in which an average primary particle diameter is 10 nm or more to 100 nm or less.2. The electrostatic charge image developing toner according to claim 1 ,wherein the metal element is a metal element having an electronegativity of 2.0 or less.3. The electrostatic charge image developing toner according to claim 2 ,wherein the metal element is lanthanum.4. The electrostatic charge image developing toner according to claim 1 ,wherein, in the strontium titanate particle, an average primary particle circularity is 0.82 or more to 0.94 or less, and a primary particle circularity that becomes 84% of accumulation is greater than 0.92.5. The electrostatic charge image developing toner according to claim 1 ,wherein in the strontium titanate particle, a half-width of a peak of a 110 plane obtained by an X-ray diffraction method is 0.2° or more to 2.0° or less.6. The ...

ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, AND TONER CARTRIDGE

An electrostatic charge image developing toner includes: a toner particle having average circularity of 0.91 or more and 0.98 or less, a silica particle externally added to the toner particle, and a strontium titanate particle that is externally added to the toner particle, that has an average primary particle diameter of 10 nm or more and 100 nm or less, that has average primary particle circularity of 0.82 or more and 0.94 or less, and circularity that becomes 84% of accumulation of the primary particle of more than 0.92. 1. An electrostatic charge image developing toner comprising:a toner particle having average circularity of about 0.91 or more and about 0.98 or less;a silica particle externally added to the toner particle; anda strontium titanate particle that is externally added to the toner particle, that has an average primary particle diameter of about 10 nm or more and about 100 nm or less, that has average primary particle circularity of about 0.82 or more and about 0.94 or less, and circularity that becomes about 84% of accumulation of the primary particle of more than about 0.92.2. The electrostatic charge image developing toner according to claim 1 ,wherein an average primary particle diameter of the strontium titanate particle is about 20 nm or more and about 80 nm or less.3. The electrostatic charge image developing toner according to claim 2 ,wherein an average primary particle diameter of the strontium titanate particle is about 30 nm or more and about 60 nm or less.4. The electrostatic charge image developing toner according to claim 1 ,wherein in the strontium titanate particle, a half-width of a peak of a about 110 plane obtained by an X-ray diffraction method is about 0.2° or more and about 2.0° or less.5. The electrostatic charge image developing toner according to claim 1 ,wherein the strontium titanate particle is a strontium titanate particle doped with a metal element other than titanium and strontium.6. The electrostatic charge image ...