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Title:
LOW-TEMPERATURE SUPERCRITICAL FOAMING PROCESS
Document Type and Number:
WIPO Patent Application WO/2021/103340
Kind Code:
A1
Abstract:
Disclosed is a low-temperature supercritical foaming process, comprising the following steps: (1) bringing a polyolefin material or a thermoplastic elastomer material into contact with at least one inert gas in a reactor at a pressure higher than atmospheric pressure to drive the gas into the material, the pressure holding temperature of the polyolefin material or thermoplastic elastomer material being lower than the melting temperature of the material by 5-40°C; (2) reducing the pressure to expand the material so as to produce a primary foamed material, and taking out the primary foamed material; and (3) taking out the primary foamed material and putting same into a tunnel furnace for secondary foaming, the temperature of the tunnel furnace being higher than the melting temperature of the material. Compared with the prior art, the present invention features high production efficiency, energy saving, and improvement of the reactor utilization rate.

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Inventors:
ZHANG XIAOHAI (CN)
ZHAI WENTAO (CN)
Application Number:
PCT/CN2020/078154
Publication Date:
June 03, 2021
Filing Date:
March 06, 2020
Export Citation:
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Assignee:
FUJIAN XINGXUN NEW MAT TECHNOLGY CO LTD (CN)
International Classes:
C08J9/12; C08L23/06; C08L23/08; C08L23/12; C08L67/00; C08L75/04; C08L77/00
Foreign References:
CN104987525A2015-10-21
CN107793586A2018-03-13
CN106336523A2017-01-18
CN106146874A2016-11-23
CN107283711A2017-10-24
CN107471509A2017-12-15
CN107778516A2018-03-09
JP2002069223A2002-03-08
JP2001013971A2001-01-19
CN200580013362A2005-04-28
Other References:
See also references of EP 4067419A4
Attorney, Agent or Firm:
QUANZHOU TANSI PATENT AGENCY(GENERAL PARTNERSHIP) (CN)
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