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Environment-friendly thermoplastic elastomer foaming setting technology

A thermoplastic elastomer and thermoplastic elasticity technology, applied in household components, household appliances, other household appliances, etc., can solve problems such as environmental protection and product quality contradictions, and achieve the effect of enhancing market competitiveness, reducing costs, and improving utilization efficiency

Inactive Publication Date: 2020-04-28
FUJIAN XINGXUN NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a foaming and shaping process for environmentally friendly thermoplastic elastomers, so as to solve the problem of contradiction between environmental protection and product quality in the prior art

Method used

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Embodiment Construction

[0023] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific examples.

[0024] The invention relates to a foaming and shaping process of an environmentally friendly thermoplastic elastomer, comprising the following steps:

[0025] ① Use thermoplastic elastomer materials to contact with at least one inert gas in a reactor with a pressure higher than atmospheric pressure to drive the gas into the material; the holding temperature of the reactor is lower than the melting temperature of the material 5 -40°C (preferably 5-10°C);

[0026] Preferably, the thermoplastic elastomer material is one of TPE, TPU, TPEE or PEBAX or a mixture of two or more materials.

[0027] Preferably, at least one inert gas in the step 1. is a supercritical fluid, which is nitrogen, carbon dioxide or a mixture of the two, and its holding pressure is 10-70 MPa (preferably 50-70 MPa), The pressure holding time...

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Abstract

The invention discloses an environment-friendly thermoplastic elastomer foaming setting technology. The technology comprises the following steps that (1) a thermoplastic elastomer material is adoptedto make contact with at least one inert gas in a reaction kettle with the pressure higher than atmospheric pressure so that gas can be driven to enter the material, wherein the pressure maintaining temperature of the reaction kettle is 5-40 DEG C lower than the melting temperature of the material; (2) the temperature is maintained, the pressure is reduced, the thermoplastic elastomer material is formed into a primary foaming material, and then, the primary foaming material is taken out from the reaction kettle; and (3) the primary foaming material is transferred into a mode of a setting machine, and a finished product is obtained after heating, secondary foaming and mold setting. Compared with the prior art, the thermoplastic elastomer material is not subjected to crosslinking operation, thus, the formed product can be recycled very conveniently, meanwhile, the foaming process and the setting process are achieved in one step in the mold of the setting machine, and the problem that thematerial is shrunk due to setting is solved.

Description

technical field [0001] The invention relates to the field of supercritical foaming technology, in particular to a foaming and shaping technology of an environmentally friendly thermoplastic elastomer. Background technique [0002] At present, in the field of shoe materials, various shock-absorbing materials have gained more and more opportunities to appear. Currently, the two most popular materials are TPU or PEBAX materials. In order to obtain a better foaming effect, foaming In the past, it was generally necessary to cross-link the material. The cross-linking method is generally achieved by adding a cross-linking agent, or by irradiating cross-linking, but the disadvantages caused by this are also obvious. That is, the cross-linked materials cannot be recycled, that is, the resulting products are less environmentally friendly and do not meet the current general direction of sustainable development in my country. [0003] The conventional ETPU shock-absorbing midsole molding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C44/08B29C44/34B29C44/38B29L31/50
CPCB29C44/08B29C44/3403B29C44/3415B29C44/3461B29C44/354B29C44/38B29L2031/504
Inventor 张小海
Owner FUJIAN XINGXUN NEW MATERIALS TECH CO LTD
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