Box type polyurethane foam preparation method

Abstract

The invention relates to a box type polyurethane foam preparation method. Through the box type polyurethane foam preparation method, it can be ensured that foaming of foaming fluid is implemented at constant temperature, constant pressure and constant humidity all the time, the quality of a foamed material is ensured, and the foamed material with the flush upper surface and uniform density can be obtained.

Description

technical field [0001] The invention relates to a method for preparing box-type polyurethane foam, and belongs to the technical field of box-type foaming. Background technique [0002] The existing patent discloses a utility model patent for a low-VOC box foam device (publication number: 207808245 U), which provides a method of reducing the air pressure for foaming, and finally a bread-shaped foam can be obtained, which is mainly achieved by reducing the air pressure. In this way, the foaming ratio can be increased, and the use of foaming liquid can be reduced. [0003] In the process of application, the inventor found the following problems: [0004] 1. The foam is in the shape of a bread, and the middle part of the foam is convex, so that the foam in the convex part needs to be cut off during use, and then discarded, resulting in a lot of waste; [0005] 2. When the foam is used for slicing, the weight of the slices on the lower side tends to be higher, which makes the o...

AI Technical Summary

Problems solved by technology

[0004] 1. The foam is in the shape of bread, and the middle part of the foam is raised, so that the foam in the raised part needs to be cut off during use, and then discarded, resulting in a lot of waste;

[0005] 2. When the foam is used for slicing, the weight of the slices on the lower side tends to be higher, which makes the overall quality inconsistent

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