文献类型：专利

英文题名：Method for producing supercritical carbon dioxide foamed universal polypropylene resin

作者：LIU T;XU Z;ZHAO L

机构：[1]UNIV EAST CHINA SCI & TECHNOLOGY

申请号：CN1621437-A

申请日：2004-10-11

公开日：2005-06-01

语种：英文

收录：DERWENT

摘要：NOVELTY - The supercritical CO2 process of foaming universal polypropylene resin includes the following steps: swelling and penetrating polypropylene in supercritical CO2 fluid for 0.5-1 hour, and fast relievingpressure and cooling. The process can obtain foamed polypropylene material with homogeneous closed micropores in controlled size. The present invention foams common isotactic propylene homopolymer and atactic propylene copolymer by means of altered foaming technological process and this lowers production cost greatly.