Method for eliminating peculiar smell of EVA (ethylene-vinyl acetate) foamed material

Abstract

The invention relates to a method for eliminating peculiar smell of an EVA (ethylene-vinyl acetate) foamed material. The foamed system comprises the following core components in parts by weight: 70-100 parts of EVA, 1-20 parts of foaming agent, 0.5-10 parts of foaming crosslinking agent, 1-25 parts of peculiar smell eliminator, 0.5-5 parts of zinc oxide and 0.5-5 parts of stearic acid. The foaming agent is one or more of azobisformamide, azodiisobutyronitrile, dinitrosopentamethylene tetramine and 4,4'-oxo-bis-benzenesulfonyl hydrazide. The foaming crosslinking agent is one or more of dicumyl peroxide and bis tert-butyl peroxycumene. The peculiar smell eliminator is one or more of aluminum tripolyphosphate, aluminum dihydrogen tripolyphosphate, aluminum dihydrogen phosphate, aluminum monohydrogen phosphate and aluminum phosphate. The method effectively eliminates peculiar smell generated in the foaming process to obtain an EVA foamed product, which is environment-friendly and smellless and has favorable foaming effect; and the method has the advantages of simple preparation technique, low price, high stability and favorable repetitiveness.

Description

technical field [0001] The invention relates to a method for eliminating the peculiar smell of EVA foam materials, in particular to an environmentally friendly and tasteless method for eliminating the peculiar smell of EVA foam materials, belonging to the field of light industrial products. Background technique [0002] EVA (ethylene-vinyl acetate copolymer) has good flexibility, low temperature resistance, stress crack resistance, toughness, transparency, gloss, heat sealing and adhesion, as well as rubber-like elasticity and non-toxicity , Good processability and dyeability. EVA has a wide range of uses and can be used to manufacture films, sheets, cables and wires, LDPE modifiers, foaming materials, hot-melt adhesives and coating products. The largest consumption area of ​​EVA resin in my country is foamed products, accounting for 60% to 70% of total consumption. Because EVA co-foaming products have properties such as softness, good elasticity, shock absorption, and che...

AI Technical Summary

Problems solved by technology

[0003] At present, EVA mainly uses formamide foaming system, and formamide is a toxic substance with a slightly pungent smell, which is classified as carcinogenic, mutagenic, and toxic substances. There are limited amount of chemical substances such as formamide, methylamide and dimethylformamide residues in brewed products, which pose a certain degree of threat to human health