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Improved molding method of ETPU (expanded thermoplastic polyurethane) foaming body

A molding method and foam technology, applied in the field of ETPU foam molding, can solve the problems of high production cost, poor connection degree of ETPU particles, etc., and achieve the effects of low production cost, improved appearance effect, and improved utilization efficiency.

Active Publication Date: 2019-05-17
晋江国盛新材料科技有限公司
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  • Description
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AI Technical Summary

Problems solved by technology

[0008] The main purpose of the present invention is to provide a kind of improved molding method of ETPU foam, to solve the relatively poor connection degree of adjacent ETPU particles in the prior art ETPU foam and the higher shortcoming of production cost

Method used

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Embodiment Construction

[0024] In order to further explain the technical scheme of the present invention, the present invention will be described in detail below through specific examples.

[0025] The invention relates to an improved molding method of an ETPU foam, comprising the following steps:

[0026] ①Immerse the TPU particles in the high-pressure fluid, so that the high-pressure fluid reaches the dissolution equilibrium in the TPU particles. The pressure of the high-pressure fluid is below 70MPa, and the temperature is below 70°C; specifically, the lower the temperature, the longer the time to reach the dissolution equilibrium , the lower the pressure of the high-pressure fluid, the longer it takes to reach the dissolution equilibrium, and the actual situation is set by the technician according to the actual situation of the factory;

[0027] ② Refrigerate the dissolved and balanced TPU granules in a cold storage so that the high-pressure fluid in the TPU granules remains in the TPU granules; ...

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Abstract

The invention discloses an improved molding method of an ETPU (expanded thermoplastic polyurethane) foaming body. The method comprises following steps: 1, TPU (thermoplastic polyurethane) particles are impregnated in high-pressure fluid, dissolution equilibrium of the high-pressure fluid in the TPU particles is realized, pressure of the high-pressure fluid is 70 MPa or lower, and temperature of the high-pressure fluid is 70 DEG C or lower; 2, the TPU particles reaching the dissolution equilibrium are refrigerated in a refrigeration storage, so that the high-pressure fluid in the TPU particlesis still retained in the TPU particles; 3, a certain quantity of TPU particles reaching the dissolution equilibrium are taken out from the refrigeration storage according to actual demands and subjected to molding in a steam foaming or die pressing foaming mode, and the ETPU foaming body is obtained. The improved molding method has the characteristics of better connectivity of the adjacent particles and low production cost.

Description

technical field [0001] The invention relates to the field of ETPU foam molding, in particular to an improved molding method of ETPU foam, which has the characteristics of better connection degree of adjacent particles and low production cost. Background technique [0002] The ETPU popcorn foams currently on the market are basically made by the following two steps. The first step is to make ETPU particles by chemical or supercritical foaming from TPU particles. These are made by one-time foaming. The high-quality ETPU particles usually need to be stored in the warehouse; the second step is to put the ETPU particles formed in the first step into the specific mold, and after steam foaming, the adjacent ETPU particles must be fused and cooled. Afterwards, finished ETPU foams are obtained, and these ETPU foams are widely used in various fields such as shoe soles, tires, and insoles in the market. [0003] But above-mentioned conventional foam molding method finds that there is f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12C08L75/04B29C44/02B29C44/34
Inventor 张小海
Owner 晋江国盛新材料科技有限公司
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