EVA-TPU dual hardness foaming sole material and preparation method thereof

A technology of EVA-TPU and shoe sole materials, which is applied in the field of materials, can solve the problems of poor compatibility of composite materials, prolonging the use time of shoe soles, and insufficient folding resistance, so as to achieve improved compatibility, high economic benefits and practicality, and improved The effect of hardness

Inactive Publication Date: 2017-08-25
LIMING VOCATIONAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the defects of the EVA sole material in the prior art, such as wear resistance, insufficient folding resistance and low comfort of the TPU sole material, and provide a dual-hardness foamed sole material formed by EVA/TPU compounding and Its preparation process solves the problem of poor compatibility of EVA-TPU composite materials, and can give full play to the excellent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In this embodiment, TPU is thermoplastic polyurethane elastomer plastic, and EVA is ethylene-vinyl acetate copolymer. The grade of EVA used in this embodiment, wherein the VA content is 15%; TPU is polyether type.

[0029] The present embodiment prepares EVA-TPU dual hardness foaming shoe sole material by the raw material preparation of following weight parts: TPU is 30 parts, and EVA is 70 parts, and wherein, the hardness of TPU is 90 degree, and VA content is 15% in the EVA, ethylene and The high polymer of octene is 20 parts, azodicarbonamide is 6 parts, dicumyl peroxide is 0.8 part, zinc stearate is 3 parts, calcium carbonate is 19 parts, and realizes by following steps:

[0030] Step 1. Weighing: Weigh the above raw materials in parts by weight.

[0031] Step 2, drying: Put the TPU weighed in step (1) into a vacuum drying oven for drying at a drying temperature of 50-80° C. and a drying time of 5-8 hours to obtain TPU particles.

[0032] Step 3, pre-plasticizatio...

Embodiment 2

[0041] The grade of EVA used in this embodiment, wherein, the VA content is 18%; TPU is polyether type.

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Abstract

The invention discloses a sole material capable of realizing dual hardness foaming. The sole material is prepared from the following raw materials in parts by weight: 100 parts of TPU and EVA in total, 20-30 parts of a compatibilizer, 5-8 parts of a foaming agent, 0.7-1 part of a crosslinking agent, 3-5 parts of an activator and 19-20 parts of a nucleating agent, wherein TPU accounts for 30-70 parts, EVA accounts for 30-70 parts, the compatibilizer is a high polymer of ethylene and octylene, the foaming agent is azodicarbonamide, the crosslinking agent is dicumyl peroxide, the activator is one of zinc oxide/stearic acid or zinc stearate, and the nucleating agent is calcium carbonate. The sole material disclosed by the invention has the advantages that wear resistance of a TPU foaming material and the flexibility and processability of an EVA foaming material are comprehensively utilized, so that the problem that an EVA-TPU composite is poor in compatibility is solved, the sole material which realizes synchronous crosslinking and uniform foaming, 'outsole-insole' integrated moulding and dual hardness foaming is prepared, and the sole material has excellent wear resistance, high elasticity and comfort.

Description

[0001] Technical field: [0002] The invention relates to the field of materials, in particular to a dual-hardness TPU-EVA foam sole material and a manufacturing method thereof. [0003] Background technique: [0004] Today's world shoe materials and their molding process are developing very rapidly. The traditional sole is mainly formed by bonding the midsole and the outsole. The outsole is often made of rubber with high anti-slip and wear resistance, while the midsole is often made of shock-absorbing and comfortable materials such as EVA. At present, the sole molding technology has been developed to the integrated molding technology of midsole and outsole. The TPU-EVA composite foam material system proposed by the present invention can cooperate with the advanced shoe sole integrated molding technology to prepare dual-hardness composite material shoe soles. [0005] EVA and TPU are two common sole materials. Among them, EVA resin is an ethylene-vinyl acetate copolymer, whi...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L75/04C08K5/14C08K5/098C08K3/26C08J9/10A43B13/04
CPCC08L23/0853A43B13/04C08J9/103C08J2203/04C08J2323/08C08J2375/08C08J2423/08C08J2475/04C08K2003/265C08L75/08C08L2203/14C08L2205/03C08L2205/08C08L2205/24C08L23/0815C08K5/14C08K5/098C08K3/26
Inventor 张青海王晖汪扬涛施养康
Owner LIMING VOCATIONAL UNIV
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