Thermoplastic elastomer foamed shoe material and preparation method thereof

A thermoplastic elastomer and elastomer technology, applied in the field of shoe material manufacturing, can solve the problems of reducing the resilience and tensile strength of foamed materials, insufficient mixing, shrinkage of foamed beads, etc.

Pending Publication Date: 2020-05-08
LI NING CHINA SPORTS GOODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to solve the above-mentioned two-phase or multi-phase material blending, such as insufficient mixing, there is a micron-scale phase separation, which leads to the problem of interfacial bonding and shrinkage, so that the physical cross-linking points between the strong polar groups in the raw materials are reduced. Severe shri...

Method used

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  • Thermoplastic elastomer foamed shoe material and preparation method thereof
  • Thermoplastic elastomer foamed shoe material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Put 40 parts of nylon elastomer 2533, 60 parts of nylon elastomer 3533, 0.3 parts of antioxidant 1010, and 5 parts of talcum powder into a high-pressure reactor, feed carbon dioxide and pressurize and heat up to make the pressure reach 35 MPa and the temperature reach 120 °C, at which point carbon dioxide is in a supercritical state. Saturation at constant temperature and constant pressure in this supercritical state for 2 hours, and then quickly release the pressure to normal pressure to obtain foamed beads; then use steam molding to prepare shoe sole samples. The steam molding pressure is 1.5bar and the time is 240s; Finally, the sole sample is heated at 50-60° C., dried for 3 hours, and the finished shoe sole is obtained after cooling.

[0043] Through the test, it can be seen that the density of the finished sole is 0.11g / cm3, the hardness is 37C, the yellowing resistance is grade 4, the compression set is 24.0% (normal temperature), the impact rebound rate is 78%, ...

Embodiment 2

[0045] Put 40 parts of nylon elastomer 3533, 60 parts of nylon elastomer 4033, 0.3 parts of antioxidant 1010, and 5 parts of talcum powder into a high-pressure reactor, feed carbon dioxide and pressurize and heat up to make the pressure reach 35 MPa and the temperature reach 120 °C, at which point carbon dioxide is in a supercritical state. Saturation at constant temperature and constant pressure in this supercritical state for 2 hours, and then quickly release the pressure to normal pressure to obtain foamed beads; then use steam molding to prepare shoe sole samples. The steam molding pressure is 1.5bar and the time is 240s; Finally, the sole sample is heated at 50-60° C., dried for 3 hours, and the finished shoe sole is obtained after cooling.

[0046] Through the test, it can be seen that the density of the finished sole is 0.13g / cm3, the hardness is 45C, the yellowing resistance is grade 4, the compression set is 13.6% (normal temperature), the impact rebound rate is 74%, ...

Embodiment 3

[0048] Put 40 parts of nylon elastomer 3533, 40 parts of nylon elastomer 4033, 20 parts of nylon elastomer 5533, 0.3 parts of antioxidant 1010, and 5 parts of talcum powder into a high-pressure reaction kettle, feed carbon dioxide and pressurize and heat up, so that The pressure reaches 35MPa, and the temperature reaches 120°C. At this time, the carbon dioxide is in a supercritical state. Saturation at constant temperature and constant pressure for 2 hours in this supercritical state, and then quickly release the pressure to normal pressure to obtain foamed beads; then use steam molding to prepare shoe sole samples, the pressure of the steam molding is 1.0bar, and the time is 240s; Finally, the sole sample is heated at 50-60° C., dried for 3 hours, and the finished shoe sole is obtained after cooling.

[0049] Through the test, it can be seen that the density of the finished sole is 0.17g / cm3, the hardness is 48C, the yellowing resistance is grade 4, the compression set is 28....

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Abstract

The invention belongs to the technical field of shoe material manufacturing, and particularly relates to a thermoplastic elastomer foaming shoe material and a preparation method thereof. The thermoplastic elastomer foaming shoe material is prepared from the following raw materials in parts by mass: 100 parts of a modified polyamide elastomer, 0.1 to 0.5 part of an antioxidant and 0 to 10 parts ofa nucleating agent, the modified polyamide elastomer at least comprises two polyamide elastomers so that the regulated and controlled melt strength is more excellent, a series of shoe foaming materials with higher foaming ratios and better elasticity are prepared through a supercritical fluid foaming technology, the foaming material has the advantages of low density, excellent resilience, excellent deformation resistance and the like, meanwhile, the material is applied to the field of sneakers, a force feedback mechanism is started for the whole running process, energy in each step of a weareris recycled and then released again, the light and efficient resilience property is guaranteed, and power can be provided for the wearer.

Description

technical field [0001] The invention belongs to the technical field of shoe material manufacturing, and in particular relates to a thermoplastic elastomer foamed shoe material and a preparation method thereof. Background technique [0002] The performance and user experience of sports shoes are largely determined by the performance of the midsole. Lightweight, high resilience, shock absorption, and low-density midsole materials can bring a good sense of experience to users. The currently recognized preferred material for the midsole is a thermoplastic elastomer material. Thermoplastic elastomer (Thermoplastic elastomer, TPE) is a material that has both rubber and thermoplastic properties. It has rubber properties at room temperature, and can be melted and plasticized at high temperatures. Therefore, it is the so-called third-generation rubber after natural rubber and synthetic rubber, and its polymer chain structure contains hard and soft segments of different molecular str...

Claims

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Application Information

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IPC IPC(8): C08L77/00C08K3/34C08K5/134C08J9/12A43B13/04A43B13/18
CPCC08J9/122C08J9/0061C08J9/0066C08J9/0023A43B13/04A43B13/187C08J2203/08C08J2203/06C08J2377/00C08J2477/00
Inventor 王旭李仁刚余本刚林永佳徐剑光
Owner LI NING CHINA SPORTS GOODS
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