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

A foaming material and odor eliminating agent technology, applied in the field of environment-friendly and odorless EVA foaming material odor elimination, EVA foaming material odor elimination field, can solve the problems of human health threat, chemical substance residue, carcinogenicity and other problems, and achieve low price , good foaming effect, the effect of eliminating odor

Inactive Publication Date: 2015-01-14
义乌市大胜橡塑制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: 8 parts of azodicarbonamide, 1 part of dicumyl peroxide, 10 parts of aluminum dihydrogen phosphate, 2 parts of zinc oxide, 3 parts of stearic acid, using the above formula and 80 parts of EVA for foaming , The foaming process and the foamed products obtained have no peculiar smell, and the test results: formamide is less than 5ppm; acetophenone is less than 5ppm; N-methylformamide is less than 5ppm; N,N-dimethylformamide is less than 5ppm , are lower than the relevant standards.

Embodiment 2

[0020] Embodiment 2: 1 part of azobisisobutyronitrile, 5 parts of dicumyl peroxide, 1 part of aluminum tripolyphosphate, 5 parts of zinc oxide, 5 parts of stearic acid, and use the above formula and 70 parts of EVA to develop Foaming, the foaming process and the obtained foamed products have no peculiar smell, and the test results: formamide is less than 10ppm; acetophenone is less than 10ppm; N-methylformamide is less than 10ppm; N,N-dimethylformamide is less than 10ppm, all lower than the relevant standards.

Embodiment 3

[0021] Example 3: 20 parts of 4,4'-oxobisbenzenesulfonylhydrazide, 10 parts of bis-tert-butylperoxycumene, 25 parts of aluminum dihydrogen phosphate, 0.5 parts of zinc oxide, and 0.5 parts of stearic acid , using the above formula and 100 parts of EVA for foaming, the foaming process and the obtained foamed products have no peculiar smell, the test results: formamide is less than 1ppm; acetophenone is less than 1ppm; N-methylformamide is less than 1ppm; N , N-dimethylformamide is less than 1ppm, all lower than the relevant standards.

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08K13/02C08K3/22C08K5/09C08K5/14C08K3/32C08J9/10
CPCC08K13/02C08J9/102C08J9/103C08J9/104C08J9/107C08J2203/04C08J2323/08C08K3/22C08K3/32C08K5/09C08K5/14C08K2003/2296C08K2003/329C08L23/0853
Inventor 吴大胜
Owner 义乌市大胜橡塑制品有限公司
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