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.
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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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