XPE (crosslinked polyethylene) foaming material and preparation method thereof

Abstract

The invention belongs to the field of macromolecule foaming materials, and particularly relates to an XPE (crosslinked polyethylene) foaming material and a preparation method thereof. The XPE foamingmaterial is prepared from the following raw materials in parts by weight: 35 to 65 parts of low density polyethylene, 26 to 36 parts of linear low density polyethylene, 5 to 30 parts of modified foaming agent, 0.5 to 1 part of crosslinking agent, 0.1 to 0.5 part of assistant crosslinker, and 1 to 3 parts of master batch, wherein the weight ratio of a foaming agent OBSH to a foaming agent BIH40 toa curing agent to a compound foaming additive to a surfactant in the modified foaming agent is 12:(6 to 10):(0.3 to 1):(0.8 to 2):(1 to 3); the total content of citric acid and carbonate in the foaming agent BIH40 is 50% or above. The invention also provides the preparation method of the XPE foaming material. The XPE foaming material has the advantages that the healthy and environment-friendly effects are realized, and the foam holes are uniform and dense.

Description

technical field [0001] The invention belongs to the field of polymer foam materials, and in particular relates to an XPE foam material and a preparation method thereof. Background technique [0002] XPE (Chemical crosslinked polyethylene foam): chemical crosslinked polyethylene foam material, which is made of low-density polyethylene resin, crosslinking agent, foaming agent and other additives after high temperature foaming High-quality materials with high strength, good stability, oil resistance, low temperature resistance, acid and alkali resistance, and chemical resistance. [0003] In the prior art, the foaming agent generally selects AC (azodicarbonamide), and AC will decompose when it reaches a certain temperature, and after decomposition, a certain amount of gas will be generated to make the material foam, but in the process of decomposition, it is often All of them will produce chemical substances with formamide groups. Formamide is slightly irritating to human skin...

AI Technical Summary

Problems solved by technology

The second is to post-process the substance that is produced, and convert the substance with formamide into other harmless substances without compromising the performance of the material. However, the second method is very difficult to operate in reality. difficult and costly

[0005] At present, XPE materials are used in large quantities. In recent years, there have been more XPE production lines in China, but the surface of the produced materials is often rough, and there are generally relatively large cells, and materials without closed cells appear. When tested by SGS authoritative institutions, they often absorb water. The rate is as high as more than 50%, and the service life is too short, which makes it impossible to apply in waterproof engineering

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