A kind of method that utilizes waste EVA-based material to prepare composite regenerated foam material

A technology of composite regeneration and foam materials, applied in recycling technology, plastic recycling, etc., can solve problems such as economic impact, achieve easy operation, realize high-value recycling, and better performance

Active Publication Date: 2022-06-24
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recycling and redistribution of used shoes to developing countries through reuse is also a common treatment method at present, but it usually brings inevitable impacts on the local economy

Method used

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  • A kind of method that utilizes waste EVA-based material to prepare composite regenerated foam material
  • A kind of method that utilizes waste EVA-based material to prepare composite regenerated foam material
  • A kind of method that utilizes waste EVA-based material to prepare composite regenerated foam material

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Experimental program
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Effect test

Embodiment 1

[0067] The present embodiment a kind of method that utilizes waste EVA base material to prepare composite regenerated foam material, mainly comprises the following steps in parts by weight:

[0068] (1) the waste EVA-based sole foam product, after pretreatment such as cleaning, is processed and roughly pulverized to the waste EVA-based material with a particle size of 10 to 20 mm;

[0069] (2) adding the waste EVA base material into the grinding disc-shaped solid-phase mechanochemical reactor for grinding and pulverizing, and after the grinding is completed, collect the waste EVA base ultrafine flake powder; wherein, the grinding-disc-shaped solid-phase mechanochemical reactor The process parameters are: the grinding pressure is 0.5MPa, the grinding surface temperature of the grinding disc is controlled by feeding a constant temperature circulating liquid medium with a temperature of -16 °C, the circular grinding is performed 12 times, and the grinding disc speed is 45 rpm;

...

Embodiment 2

[0074] The present embodiment a kind of method that utilizes waste EVA base material to prepare composite regenerated foam material, mainly comprises the following steps in parts by weight:

[0075] (1) the waste EVA-based sole foam product, after pretreatment such as cleaning, is processed and roughly pulverized to the waste EVA-based material with a particle size of 10 to 20 mm;

[0076] (2) adding the waste EVA base material into the grinding disc-shaped solid-phase mechanochemical reactor for grinding and pulverizing, and after the grinding is completed, collect the waste EVA base ultrafine flake powder; wherein, the grinding-disc-shaped solid-phase mechanochemical reactor The process parameters are: the grinding pressure is 0.4 MPa, the grinding surface temperature of the grinding disc is controlled by feeding a constant temperature circulating liquid medium with a temperature of -14 °C, and the circular grinding is performed 10 times, and the grinding disc rotating speed ...

Embodiment 3

[0116] The present embodiment a kind of method that utilizes waste EVA base material to prepare composite regenerated foam material, mainly comprises the following steps in parts by weight:

[0117] (1) the waste EVA-based sole foam product, after pretreatment such as cleaning, is processed and roughly pulverized to the waste EVA-based material with a particle size of 10 to 20 mm;

[0118] (2) adding the waste EVA base material into the grinding disc-shaped solid-phase mechanochemical reactor for grinding and pulverizing, and after the grinding is completed, collect the waste EVA base ultrafine flake powder; wherein, the grinding-disc-shaped solid-phase mechanochemical reactor The process parameters are: the grinding pressure is 0.8MPa, the temperature of the grinding surface of the grinding disc is controlled by feeding a constant temperature circulating liquid medium with a temperature of -10 °C, the circular grinding is performed 10 times, and the grinding disc speed is 50 r...

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Abstract

The invention provides a method for preparing a composite recycled foam material by using waste EVA-based materials. The method utilizes solid-phase shearing milling technology, and by further limiting the milling process parameters, waste EVA is obtained under suitable conditions. The waste EVA-based ultra-fine flake powder is used to blend and compound the waste EVA-based ultra-fine flake powder with TPU, and the TPU / waste EVA-based composite foam material is further prepared by supercritical carbon dioxide foaming technology. The method of the present invention greatly reduces the particle size and particle size distribution of the waste EVA-based powder on the one hand, and further improves the surface activity of the powder through the flake shape; wherein, the flake powder and granular or strip shape Compared with the appearance, it further improves the melt blending with TPU, and finally combines the supercritical carbon dioxide foaming technology to prepare a higher performance TPU / waste EVA-based composite foam material / product.

Description

technical field [0001] The invention belongs to the technical field of waste EVA-based material recycling, and relates to a method for preparing composite regenerative foam materials by using waste EVA-based materials, in particular for using the mechanochemical reactor disclosed in Chinese authorized patent ZL 95111258.9 to waste EVA-based materials, especially The foam material is processed. Background technique [0002] EVA is the copolymerization of ethylene and acetic acid, Chinese chemical name: ethylene-vinyl acetate copolymer (ethylene-vinyl acetate copolymer), English chemical name: Ethylene Vinyl Acetate Copolymer. The application fields of EVA are quite extensive, and the global market consumption is increasing every year, especially in the footwear industry, it is used in the soles and interior materials of medium and high-end travel shoes, hiking shoes, slippers, sandals. [0003] The rapid development of society makes people's demand for footwear products incr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29B17/04B29C35/02B29C44/34B29C44/60B29B9/06
CPCB29B17/0404B29C44/60B29C44/35B29B9/06B29C35/02Y02W30/62
Inventor 李莉刘兆港郭武
Owner SICHUAN UNIV
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