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Environment-friendly EVA (ethylene vinyl acetate copolymer) insole

An environmentally friendly, foaming bead technology, applied in shoe soles, footwear, applications, etc., can solve the problems of undisclosed preparation steps and process parameters of supercritical foaming materials, achieve low compression set, increase yield, and be good The effect of resilience

Active Publication Date: 2017-12-22
FUJIAN XINGXUN NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the patent 2016101509713, the EVA blend uses peroxide as the crosslinking agent, and then adopts the intermittent decompression foaming process to obtain a supercritical EVA foam material. In the patent 201510014608.4, only one kind of environmental protection is disclosed. The molding method of the foamed material, although the supercritical foamed EVA material is mentioned, the specific preparation steps and process parameters of the supercritical foamed material are not disclosed

Method used

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  • Environment-friendly EVA (ethylene vinyl acetate copolymer) insole
  • Environment-friendly EVA (ethylene vinyl acetate copolymer) insole

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Formula: 100 parts of EVA, 3 parts of calcium carbonate, 0.5 part of antioxidant 1010, 1 part of antibacterial agent ZnO, 6 parts of titanium dioxide.

[0024] Preparation steps: Put the raw materials into the internal mixer in turn and knead at 120 ° C. After the kneading is even, discharge, put the film into the extruder, extrude and granulate, and dry; put the above granules into the electron beam Carry out irradiation cross-linking in the irradiator, the irradiation amount is 80kGy; put the irradiation cross-linked particles into the reaction kettle, the temperature in the kettle is 55°C, and the pressure in the kettle reaches 30Mpa after nitrogen gas is introduced, and the sealing is saturated for 16h , and then release the pressure, unload the particles, put them in a 110°C oven for foaming for 10 minutes, and obtain foamed beads; then put the foamed beads into a mold for steam hot-press molding, with a steam pressure of 1.2 MPa, to obtain foamed beads. Foam midso...

Embodiment 2

[0027] Formula: 70 parts of EVA, 30 parts of POE, 1 part of TMPTMA, 5 parts of calcium carbonate, 1 part of antioxidant 1010, 1 part of antibacterial agent ZnO.

[0028] Preparation steps: Put the raw materials into the internal mixer in turn and knead at 115°C. After the kneading is even, discharge, put the film into the extruder, extrude and granulate, and dry; put the above granules into the electron beam Carry out irradiation cross-linking in the irradiator, the irradiation amount is 50kGy; put the irradiation cross-linked particles into the reaction kettle, the temperature in the kettle is 30°C, and the pressure in the kettle reaches 35Mpa after nitrogen gas is introduced, and the sealing is saturated for 8h , and then release the pressure, unload the particles, put them in a 120°C oven for foaming for 12 minutes, and obtain foamed beads; then put the foamed beads into a mold for steam hot-press molding, with a steam pressure of 1.2 MPa, to obtain foamed beads. Foam midso...

Embodiment 3

[0031] 85 parts of EVA, 15 parts of SEBS, 0.2 parts of TMPTMA, 5 parts of calcium carbonate, 1 part of antioxidant 1010, and 1 part of antibacterial agent ZnO.

[0032] Preparation steps: Put the raw materials into the internal mixer in turn and knead at 115°C. After the kneading is even, discharge, put the film into the extruder, extrude and granulate, and dry; put the above granules into the electron beam Carry out irradiation cross-linking in the radiation, the irradiation dose is 60kGy; put the irradiation cross-linked particles into the reaction kettle, the temperature in the kettle is 70°C, after feeding nitrogen gas, the pressure inside the kettle reaches 30Mpa, seal and saturate for 8h, Then release the pressure, unload the particles, put them into a 120°C oven for foaming, and obtain foamed beads; then put the foamed beads into a mold for steam hot-press molding, with a steam pressure of 1.2 MPa, to obtain foamed shoes midsole.

[0033] Basic properties: density is 0...

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Abstract

The invention provides a preparation method of environment-friendly EVA (ethylene vinyl acetate copolymer) foamed beads and insole. The highly-elastic foamed beads are prepared from EVA particles, EVA and POE (polyolefin elastomer) blended particles, EVA and SEBS (styrene-ethylene-butylene-styrene) blended particles or EVA, POE and SEBS blended particles as raw materials with an irradiation crosslinking technology and an intermittent supercritical nitrogen foaming technology, then the highly-elastic foamed beads are subjected to hot pressing molding with steam, and the foamed middle sole is prepared. Compared with an existing traditional chemically foamed sole, the crosslinked elastomer foam material formed through supercritical nitrogen foaming is more complete and full in foam structure, has better elasticity and is free of harmful residues.

Description

technical field [0001] The invention relates to an environment-friendly EVA foaming bead and a manufacturing method of a shoe midsole. Background technique [0002] In recent years, as people pay more attention to their health, more and more people are interested in various sports, and high-performance sports shoes have become a popular product. At present, the EVA foam soles on the market basically adopt the chemical foaming method, by adding peroxide crosslinking agent and foaming agent azodicarbonamide (AC), and vulcanizing and foaming at high temperature to obtain finished products. In this kind of shoe sole, some toxic substances will remain in the crosslinking agent and chemical foaming agent during the preparation process, and people are gradually paying more attention to the residue and odor. Therefore, the demand for new environmentally friendly shoe materials is very urgent. [0003] Adidas BOOST shoes are very popular in the market now, not only because of the hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L53/02C08K13/02C08K3/26C08K3/22C08K5/134A43B13/04C08J3/28C08J3/24C08J9/12
CPCA43B13/04C08J3/24C08J3/246C08J3/28C08J9/122C08K3/22C08K3/26C08K5/1345C08K13/02C08L23/0853C08J2323/08C08J2203/06C08J2453/02C08J2423/08C08K2003/2241C08K2003/265C08K2003/2296C08L2203/14C08L23/0815C08L53/025
Inventor 张振秀孙琰张昕
Owner FUJIAN XINGXUN NEW MATERIALS TECH CO LTD
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