EVA foam material and preparation method thereof

Abstract

The invention relates to an EVA (ethylene / vinyl acetate) foam material and a preparation method thereof. The foaming material comprises the following components in parts by weight: 100 of EVA, 2-10 of a foaming agent, 0.5-5 of a foaming promoter, 0.05-1 of a bridging agent, 5-30 of a filler, 0.5-5 of a deodorant, and 0.5-5 of a lubricant. The preparation method includes: mixing the raw materials uniformly, then drying the mixture in an oven at 60-80DEG C for 6-12h to obtain a dried mixture, subjecting the dried mixture to mixing injection molding to obtain an EVA sheet, cutting the EVA sheet, then putting the cut EVA sheet into a flat vulcanizing machine to undergo die-filling hot pressing, then performing automatic pressure release, and cooling the die, thus obtaining the EVA foam material. Compared with the prior art, the deodorant integrating absorption and reaction is adopted by the invention and added to EVA and various additives. With very good dispersibility, the deodorant reacts with an ammonia radical through a chelating mechanism and strongly adsorbs ammonia so as to effectively remove the ammonia radical and ammonia, and can destroy the formation conditions of formamide before its formation and has no influence to the properties of production products. Thus, the EVA foam material has wide application.

Description

technical field [0001] The invention belongs to the technical field of chemical modification, and in particular relates to an EVA foam material and a preparation method thereof. Background technique [0002] Ethylene-vinyl acetate copolymer (EVA) cross-linked foaming material has the characteristics of low density, good physical properties, and good weather resistance. It has developed rapidly in recent years and is widely used in sports equipment, mattresses, children's floors, life-saving products, high-end sports Manufacture of shoes etc. Especially brightly colored children's floor mats can be seen in many families with children, including children's play areas in kindergartens, shopping malls and fast food restaurants. [0003] EVA foam products on the market all have a pungent smell, which will slowly disappear after long-term use. After research and testing, it is found that formamide residues are common in EVA foam products. EVA plastic itself is non-toxic and har...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of formamide in children's floor mats, domestic EVA foam manufacturers have studied the use of a new foaming agent OBSH (4,4-oxobisbenzenesulfonyl hydrazide) to replace AC, but many indicators of the properties of the products produced It cannot be compared with the foamed products produced by the existing AC foaming agent

Moreover, OBSH foaming agent is much more expensive than AC, and the finished product still has formamide residue.

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