Modified EVA (ethyl?vinyl acetate) foaming body and preparation method and application of the same

A foam and modification technology, applied in the field of modified EVA foam and its preparation and application, can solve the problems of shrinkage and compression deformation of injection EVA products, and achieve good durability, good durability and excellent durability. Effect

Inactive Publication Date: 2012-06-20
THE QUARTERMASTER EQUIPMENT RESEARCH INSTITUTE OF THE GENERAL LOGISITIC DEPARTME +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Generally, injection EVA products have shortcomings such as serious shrinkage and compression deformation, whi

Method used

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  • Modified EVA (ethyl?vinyl acetate) foaming body and preparation method and application of the same
  • Modified EVA (ethyl?vinyl acetate) foaming body and preparation method and application of the same

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1, prepare modified EVA foam

[0022] The trade name of 70 parts by weight is EVA7350, the number average molecular weight is 800-2000 ethylene ethyl acetate copolymer (the mass percent composition of ethyl acetate (VA) is 18%), the trade name of 30 parts by weight is POE8003 , Polyolefin elastomer with a number average molecular weight of 600-2000 and 50 parts by weight of hemp stalk core powder with a particle size of 500 mesh are put into an internal mixer for mixing. During the mixing process, the temperature of the mixer does not exceed 70 degrees , the mixing temperature is 80-100°C, and the mixing time is 0.2 hours;

[0023] Simultaneously with the whipping agent azodicarbonamide of AC3000 by the trade name of 4 parts by weight, the bridging agent dicumyl peroxide (DCP) of 0.6 part by weight, the activator stearic acid of 2 parts by weight and 1 part by weight Put the zinc oxide into another internal mixer for mixing. During the mixing process, the te...

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Abstract

The invention discloses a modified EVA (ethyl vinyl acetate) foaming body and a preparation method and an application of the same. The modified EVA foaming body comprises ethylene ethyl acetate copolymer, polyolefin elastomer, lignocelluloses powder, foaming agent, bridging agent, activator and zinc oxide at a mass ratio of 70:30:(20-80):(3.0-5.0):(0.4-1.0):(1.0-3.0):(0.5-2.5). The modified EVA foaming body has a specific weight of lower than 0.2, light weight and compression set resistance of lower than 50% and can be worn for a long time, the insoles of a pair of shoes prepared with the modified foaming body have light weight and good durability, the modified EVA foaming body is suitable for producing insoles and pads of various sports and casual shoes and has an important application value.

Description

technical field [0001] The invention relates to a modified EVA foam and its preparation method and application. Background technique [0002] Injection ethylene ethyl acetate copolymer (referred to as EVA) is a product obtained by plasticizing, granulating, and melting EVA raw materials at high temperature, injecting it into a mold through a pipeline, and then foaming outside the mold. The sole of general sports shoes is composed of a foam midsole and a wear-resistant rubber outsole. Since ethylene-vinyl acetate copolymer (EVA) has good plasticity, elasticity, and workability, the foamed material has low density and good mechanical properties. Good, easy coloring and other advantages. At present, the midsole or insole of most sports shoes is made of EVA foam material. [0003] Generally, injection EVA products have shortcomings such as serious shrinkage and compression deformation, which have great obstacles and limitations to subsequent production and use. Therefore, a ne...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L23/00C08L97/02C08K3/22C08K5/14C08K5/09C08J9/10A43B13/04A43B17/14
CPCA43B17/14C08J2201/026C08K5/098C08K5/14C08J9/0066C08J9/0033C08J2323/16B32B5/18C08J9/0061A43B13/04C08L23/00C08K5/09C08J2323/08A43B13/187C08J9/10C08L23/08C08K5/42C08J9/103C08H8/00C08L23/0853C08K3/22A43B13/02C08J2497/02C08L97/02C08K5/0025C08L31/04C08L23/16C08L97/00
Inventor 郝新敏甘舸张建春赵鹏程黄杰
Owner THE QUARTERMASTER EQUIPMENT RESEARCH INSTITUTE OF THE GENERAL LOGISITIC DEPARTME
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