A kind of foamed thermoplastic polyurethane elastomer material sole and preparation method thereof

Abstract

The invention discloses a preparation method of a novel foaming thermoplastic polyurethane elastomer material (novel F-TPU material) sole. The preparation method comprises the steps of: heating and extruding novel F-TPU material granules by a single-screw extruder, melting the novel F-TPU material granules and extruding novel F-TPU material melt, injecting the novel F-TPU material melt into a sole mold, and cooling and curing for molding. The invention also discloses a novel F-TPU material sole. According to the novel F-TPU material sole and the preparation method thereof, the novel F-TPU material sole is high in strength, good in elasticity, light in weight, wearable, comfortable and anti-slip, has a cushioning effect for ground impact, can be made into soles of multiple colors and multiple hardness, is integrally molded in sole midsole and outsole, and has the advantages of no pollution, low cost and simple process.

Description

technical field [0001] The invention relates to the technical field of organic polymer chemical industry, in particular to a foamed thermoplastic polyurethane elastomer material (F-TPU material) shoe sole and a preparation method thereof. Background technique [0002] As we all know, traditional shoe materials mostly use rubber as the sole, and its rubber content is at most about 40%. Low-grade shoes have lower rubber content. Due to the existence of a large number of fillers, the rubber sole has low strength and poor performance. The midsole is made of EVA foam (primary foam) and PHYION foam (secondary foam). Among them, the PHYION midsole is used more, which is light, elastic and has good shock absorption performance, but the wear resistance of the PHYION midsole is relatively poor. The EVA midsole is similar to the PHYION midsole, but it has been foamed once, and the cost is relatively low, but at the same time, the elasticity and wear resistance are worse than the PHYIO...

AI Technical Summary

Problems solved by technology

Among them, the PHYION midsole is used more, which is light, elastic and has good shock absorption performance, but the wear resistance of the PHYION midsole is relatively poor.

The EVA midsole is similar to the PHYION midsole, but it has been foamed once, and the cost is relatively low, but at the same time, the elasticity and wear resistance are worse than the PHYION midsole.

The following disadvantages exist in the production of EVA microporous foam shoe materials: EVA or other material soles are bonded with different hot-melt adhesives, and various hot-melt adhesive products have certain toxicity to varying degrees. and part of the work must be done manually

However, when the existing materials adopt the disc machine injection process, they cannot be molded at one time

TPU soles also have some disadvantages, such as heavy weight, high hardness, and poor shock absorption performance. Therefore, how to improve the shortcomings of TPU soles and make TPU soles integrate many advantages has become a major research topic in the current TPU sole industry.

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