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High-resilience aging-resistant EVA foamed material and preparation method thereof

A foaming material, anti-aging technology, used in applications, shoe soles, clothing and other directions, can solve the problems of large thermal shrinkage, easy deformation, odor and unpleasant, and achieve the effect of light weight, good elasticity and resilience

Active Publication Date: 2016-11-16
湖北福力德鞋业有限责任公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the midsole or insole of most sports shoes is made of EVA foam material, which is easy to deform after wearing for a long time, and it is not easy to recover, and the odor is unpleasant
[0003] Generally, injection EVA products have disadvantages such as poor resilience, poor aging resistance, and excessive heat shrinkage, which have great obstacles and limitations to subsequent production and use. Therefore, it is necessary to provide a new high resilience anti-aging EVA Foaming materials to solve the above-mentioned shortcomings that cannot be overcome by general injection EVA

Method used

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  • High-resilience aging-resistant EVA foamed material and preparation method thereof
  • High-resilience aging-resistant EVA foamed material and preparation method thereof
  • High-resilience aging-resistant EVA foamed material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1, preparation modified lignocellulose powder foam body

[0033] 50 parts by weight of lignocellulose powder with a particle size of 500 meshes are uniformly sprayed with 5 parts by weight of silane coupling agent, stored and dried to prepare uniform modified lignocellulose powder.

[0034] The trade name EVA7470 of 50 parts by weight, the ethylene-vinyl acetate copolymer (wherein the mass percent composition of vinyl acetate (VA) is 26%), the trade name GT-01 of 50 parts by weight, number average molecular weight is 1800, Number-average molecular weight is that the partially hydrogenated styrene-butadiene polymer of 20000 and the particle diameter of 50 parts by weight are 500 purpose modified lignocellulose powders and put into internal mixer and mix, and in the process of mixing, the temperature of open mixer is not constant. If it exceeds 70°C, the kneading temperature is 90°C, and the kneading time is 0.2 hours.

[0035] Simultaneously with the whipping...

Embodiment 2-7

[0040] Example 2-7, preparation of modified lignocellulose powder foam

[0041] Following the same steps as in Example 1, only the components were replaced according to the parts by weight listed in Table 1, to obtain the modified lignocellulose powder foam prepared in Examples 2-7.

[0042] Table 1, the list of parts by weight of each raw material in the modified lignocellulose powder foam prepared in Examples 1-7

[0043]

Embodiment 3

[0044] Embodiment 3, performance test of modified lignocellulose powder foam body

[0045] The physical properties of the lignocellulose powder foams prepared in Examples 1-7 are shown in Table 2.

[0046] In Table 2, the test methods for each indicator are as follows:

[0047] Apparent density: HG / T 2872-2009, test piece with leather;

[0048]Tensile strength: GB / T 10654-2001, the test piece with skin, the distance between the marking lines is 50mm, take the average value of the test results in two vertical directions;

[0049] Elongation at break: GB / T 10654-2001, the test piece with skin, the distance between the marking lines is 50mm, and the average value of the test results in two vertical directions is taken;

[0050] Right-angle tear strength: GB / T 10808-2006, test piece with leather, test speed 50mm / min;

[0051] Resilience: GB / T 10652-2001, test piece with leather;

[0052] Peel strength of sole circumference after humidified aging: GB / T 3903.7-2005, Appendix E.5...

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Abstract

The invention provides a high-resilience aging-resistant EVA foamed material and a preparation method thereof. The method comprises the following steps that 1, lignocellulose powder is modified through a silane coupling agent to obtain modified lignocellulose powder; 2, part of a hydrogenated styrene butadiene polymer, an ethylene-vinyl acetate polymer and the modified lignocellulose powder are added into an internal mixer to be mixed; 3, a foaming agent, a bridging agent, an activating agent and zinc oxide are added into the internal mixer to be mixed; 4, the materials mixed through the step 2 and the step 3 are granulated, injection foaming is conducted, cooling forming is conducted, and then the high-resilience aging-resistant EVA foamed material is obtained. After EVA is foamed by adding kenaf stalk powder, compressive deformation of EVA is obviously improved, and compressive deformation generated when EVA is foamed by adding the kenaf stalk powder is 15% higher than that generated when EVA is foamed without adding the kenaf stalk powder. A shoe insole made of the modified foamed body is light, durable, capable of reducing shock, high in resilience and good in tear resistance, and the EVA foamed material is suitable for various athletic and leisure shoe insoles and has an important application value.

Description

technical field [0001] The invention relates to a high resilience anti-aging EVA foam material and a preparation method thereof. Background technique [0002] Injected lignocellulose powder is a product obtained directly by plasticizing, granulating, and granulating lignocellulose powder and other raw materials at high temperature, then injecting it into a mold through a pipeline, and then foaming outside the mold. The sole of general sports shoes is composed of foam midsole and wear-resistant rubber outsole. Because lignocellulose powder has good plasticity, elasticity and processability, the foamed material has low density, good mechanical properties and easy coloring. Etc. At present, the midsole or insole of most sports shoes is made of EVA foam material, which is easy to deform after wearing for a long time, and it is not easy to recover, and the odor is unpleasant. [0003] Generally, injection EVA products have disadvantages such as poor resilience, poor aging resis...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L53/02C08L97/02C08K5/14C08K5/09C08K3/22C08J9/10A43B13/04
CPCA43B13/04C08J9/103C08J2203/04C08J2323/08C08J2353/02C08J2397/02C08L23/0853C08L53/025C08L97/02C08L2203/14C08L2205/03C08L2205/16C08K5/14C08K5/09C08K2003/2296
Inventor 郝新敏黄杰赵鹏程陈晓甘舸徐常青李仁刚汪德富乔荣荣
Owner 湖北福力德鞋业有限责任公司
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