Polyurethane elastomer forming method and sports safety protective article made by adopting polyurethane elastomer forming method

A technology of elastomer resin and foamed polyurethane, which is applied in the field of polyurethane material forming, can solve the problems of cushioning, rebound resilience, human injury, etc., and achieve the effects of reducing surface viscosity, enhancing protection, and enhancing durability

Active Publication Date: 2014-12-24
DONGGUAN TANGXIA YIFENG SPORTS TECH CO LTD
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  • Abstract
  • Description
  • Claims
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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 protective article made by adopting polyurethane elastomer forming method
  • Polyurethane elastomer forming method and sports safety protective article made by adopting polyurethane elastomer forming method
  • Polyurethane elastomer forming method and sports safety protective article made by adopting polyurethane elastomer forming 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

The invention relates to a foamed polyurethane elastomer forming method. The method comprises the following steps: mixing pre-foamed resin granules, with different densities, of a foamed polyurethane elastomer; injecting the granules into a cylinder of a foaming forming machine, then pushing the granules into a mold, and fulfilling the mold with the granules; pressing the granules in the mold; heating the pressed granules by virtue of steam to form a hot-melt integrated pre-formed body; cooling the pre-formed body, removing the mold, finally drying, and stereotyping the pre-formed body to obtain the resin formed body of the foamed polyurethane elastomer. The invention also provides a foamed polyurethane elastomer resin sports safety protective article made according to the method. Compared with an EVA material, for the resin formed boy of the foamed polyurethane elastomer, made according to the method, the elasticity is obviously improved, and the safety protection performance of a product can be improved.

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 Applications(China)
IPC IPC(8): B29C44/02B29C44/60B29C71/00
Inventor 梁冠华
Owner DONGGUAN TANGXIA YIFENG SPORTS TECH CO LTD
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