Polyurethane elastomer forming method and sports safety protection article made by the method

A technology of safety protection and foaming polyurethane, which is applied in the field of polyurethane material forming, can solve the problems of human injury, cushioning, and rebound resilience, etc., and achieve the effect of enhancing protection, reducing surface viscosity, and increasing decorative functions

Active Publication Date: 2017-12-19
DONGGUAN TANGXIA YIFENG SPORTS TECH CO LTD
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Problems solved by technology

[0002] EVA (ethylene-vinyl acetate copolymer) is a commonly used sports safety protection material, especially as a shoe sole material. EVA materials are generally formed by heating the pellets into a liquid and then injecting them into the mold. The sports safety protection products made of EVA materials, especially the soles, will gradually decrease in cushioning and resilience during repeated use and impact, which may cause harm to the human body

Method used

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  • Polyurethane elastomer forming method and sports safety protection article made by the method
  • Polyurethane elastomer forming method and sports safety protection article made by the method
  • Polyurethane elastomer forming method and sports safety protection article made by the method

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Embodiment

[0053] According to the weight ratio of 1:1, pre-expanded polyurethane pellets (BASF) with densities of 110g / l and 120g / l were weighed respectively, and mixed with a mixer (manufactured by Shenzhen Huaweixin Machinery Equipment Co., Ltd.). 50 kg of the mixed polyurethane pre-expanded pellets were injected into the feed vat of a foam molding machine (K813 type, manufactured by Kurtz), and water was added to the feed vat at a rate of 30 ml / min. Push the pellets through the feeding pipe into the mold with a reserved pressing position in the foam molding machine. Due to the addition of an appropriate amount of water, the surface viscosity of the polyurethane pellets decreases, and the feeding process is smooth and there is no adhesion of the feeding pipe . After the pellets are filled with the mold, press material is carried out, and the material pressing distance is 15mm. Then open the steam valve of the forming machine, make the steam temperature reach 120°C, and the steam pres...

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Abstract

A method for forming foamed polyurethane elastomer resin is provided, comprising: mixing pre-expanded pellets of foamed polyurethane elastomer resin with different densities; injecting the pellets into a material tank of a foam molding machine, then pushing them into a mold and The mold is filled; the pellets in the mold are pressed; the pressed pellets are steam-heated to form a hot-melt integrated preform; the preform is cooled and then demoulded. , and finally perform drying and setting treatment to obtain a foamed polyurethane elastomer resin molded body. Also provided is the foamed polyurethane elastomer resin sports safety protective article made according to the method. Compared with the EVA material, the resilience of the foamed polyurethane elastomer resin formed body made by the method of the invention is obviously improved, thereby enhancing the safety protection performance of the product.

Description

technical field [0001] The invention relates to a forming method of a polyurethane material, in particular to a forming method of a foamed polyurethane elastomer resin and sports safety protective articles made by the method. Background technique [0002] EVA (ethylene-vinyl acetate copolymer) is a commonly used sports safety protection material, especially as a shoe sole material. EVA materials are generally formed by heating the pellets into a liquid and then injecting them into the mold. The sports safety protection products made of EVA materials, especially the soles, will gradually decrease in cushioning and resilience during repeated use and impact, which may cause harm to the human body. For this reason, in recent years, foamed polyurethane elastomer resins with light weight, wear resistance and good elasticity have been widely used as sole materials and other sports protection materials. In a conventional foamed polyurethane molding method, a polyol component and an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C44/02B29C44/60B29C71/00
Inventor 梁冠华
Owner DONGGUAN TANGXIA YIFENG SPORTS TECH CO LTD
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