02-05-2023 дата публикации
Номер: CN116038979A
Принадлежит:
The invention relates to the technical field of high polymer materials, in particular to a polyurethane foam composite board and a preparation method thereof.The method comprises the following steps that S1, two metal plates are pressed into the shape of a lower cover 5 and the shape of an upper cover 7 respectively; s2, the surfaces of the two metal plates are cleaned up; s3, putting the rodent repellent, the polyisocyanate, the polyether polyol and the foaming agent into an injection device; s4, combining the two metal plates subjected to compression molding in an injection device to form a cavity; s5, injecting a rodent repellent, polyisocyanate, polyether polyol and a foaming agent into the cavity by using an injection device; and S6, the two metal plates covered with the rodent repellent, the polyisocyanate, the polyether polyol and the foaming agent are moved into a mold through an injection device. The method has the beneficial effects that the polyurethane foam in the polyurethane ...
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