EVA foam material and preparation method thereof

A foaming material, EVA100 technology, applied in the field of EVA foaming material and its preparation, can solve the problems of expensive OBSH foaming agent, inability to compare foamed products, formamide residue, etc., and achieve a wide range of uses

Inactive Publication Date: 2014-05-14
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • EVA foam material and preparation method thereof
  • EVA foam material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Mix 100 parts of EVA260 (VA content is 28wt%), 2 parts of AC3000-H, 1 part of zinc oxide, 0.05 parts of BIBP, 5 parts of calcium carbonate, 0.5 parts of SW100, 0.5 parts of stearic acid and bake in an oven at 60 °C 6h, then carry out mixing injection molding, the temperature is controlled at 100°C, at this time is the temperature at which the crosslinking agent works, and the blowing agent has not yet taken effect. Continue to cut the EVA sheet obtained by injection molding and put it into a flat vulcanizing machine for hot pressing. Control the molding temperature at 160°C, the pressure at 1Mpa, and the time for 1min. After that, the pressure will be automatically released, and then the mold will be cooled, and the EVA foam material 1# will be taken out. For testing.

Embodiment 2

[0036] Mix 100 parts of EVA7350 (VA content is 18wt%), 4 parts of AC3000-H, 0.5 parts of zinc stearate, 0.1 part of DCP, 10 parts of talcum powder, 1 part of SW120, and 2 parts of stearic acid, and then put them in an oven at 70 ° C Internally bake for 10 hours, then carry out mixing and injection molding, the temperature is controlled at 110°C, at this time is the temperature at which the crosslinking agent works, and the foaming agent has not yet taken effect. Continue to cut the EVA sheet obtained by injection molding, put it into a flat vulcanizing machine, install it into a mold and press it, control the molding temperature at 170°C, the pressure at 5Mpa, and the time for 5min, then automatically release the pressure, then cool the mold, and take out the EVA foam material 2#, For testing.

Embodiment 3

[0038] Mix 100 parts of EVA8038 (VA content is 14wt%), 8 parts of AC3000-H, 3 parts of zinc oxide, 0.5 parts of PL400, 20 parts of calcium carbonate, 3 parts of SW5510, and 5 parts of stearic acid, and then bake in an oven at 80°C 12h, then carry out mixing injection molding, the temperature is controlled at 120 ℃, at this time is the temperature at which the crosslinking agent works, and the blowing agent has not yet taken effect. Continue to cut the EVA sheet obtained by injection molding, put it into a flat vulcanizing machine, load it into a mold and press it, control the molding temperature at 180°C, the pressure at 10Mpa, and the time for 10min, then automatically release the pressure, then cool the mold, and take out the EVA foam material 3#, For testing.

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08J9/10C08K13/02C08K3/22C08K5/098C08K5/14C08K5/3492C08K5/103C08K3/26C08K3/34C08K5/09
CPCC08K13/02C08J9/103C08J2203/04C08J2323/08C08K3/22C08K3/26C08K3/34C08K5/09C08K5/098C08K2003/2296C08K2003/265C08L2203/14C08L23/0853
Inventor 宋玲
Owner HEFEI GENIUS NEW MATERIALS
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