Injection-molded integrated multi-color thermoplastic elastomer foamed shoe sole and manufacturing method thereof

Abstract

The invention discloses an injection-molded integrated multi-color thermoplastic elastomer foamed shoe sole. The foamed shoe sole is in an integrated shoe sole shape formed by at least two color grouped thermoplastic elastic foaming bodies, and the surface of each color grouped thermoplastic elastic foaming body is provided with injection strip textures which are randomly overlapped in a multi-layer strip shape. The preparation method comprises the following steps that at least two color grouped thermoplastic elastomer raw material, a lubricant and a foaming aid are subjected to grouped mixingand heating to form thermoplastic elastomer melts, a gas foaming agent is respectively and correspondingly pressurized and injected into the thermoplastic elastomer melts and then fully mixed to forma thermoplastic elastic gas foamed polymer; and the thermoplastic elastic gas polymer foaming strips grouped in different colors are respectively extruded and / or the thermoplastic elastic gas polymerfoaming strips grouped in at least two colors are co-extruded into a mold by a co-extrusion process through an extrusion injection process to form a multi-layer strip-shaped random overlapping state,and then mold closing, exhausting and shaping are carried out to obtain the injection-molded integrated multi-color thermoplastic elastomer foamed shoe sole. Injection strip isolation textures in a random overlapping shape are arranged on the surface of the shoe sole, and the color groups can achieve a relatively standard color separation effect.

Description

technical field [0001] The invention relates to the technical field of manufacturing foamed shoe soles, in particular to an injection-molded integrated multi-color thermoplastic elastomer foamed shoe sole and a manufacturing method thereof. Background technique [0002] The midsole of Adidas' Boost series foam shoes is made of TPU raw materials processed into ETPU particles, and then molded by hot pressing and cold pressing with a mold. Excellent, full foaming and low density characteristics. [0003] However, due to the nature of ETPU particles, the surface of the ETPU particle foamed sole produced by this process will form an overall visual effect such as dense particle patterns in the shape of a foam board. There is a certain sense of discomfort; moreover, due to the one-time molding process, when the ETPU particles of various colors are loaded into the mold, the particle distribution will be uneven due to the flow and sliding between the ETPU particles, so it is difficu...

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Problems solved by technology

[0003] However, due to the nature of ETPU particles, the surface of the ETPU particle foamed sole produced by this process will form an overall visual effect such as dense particle patterns in the shape of a foam board. There is a certain sense of discomfort; moreover, due to the one-time molding process, when the ETPU particles of various colors are loaded into the mold, the particle distribution will be uneven due to the flow and sliding between the ETPU particles, so it is difficult to realistically Effectively achieve a relatively standard color separation effect, so the soles of this type of finished shoe body are all solid-color soles, and are mostly used as midsoles, or through secondary processing, the auxiliary sheet is bonded and spliced ​​to the ETPU particle foam sole. Make finished soles with functional specialization or aesthetic specialization

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