Process for preparing foam resin product

Application Number: 00108892
Application Date: 2000.03.28
Publication Number: 1270968
Publication Date: 2000.10.25
Priority Information: 1999/7/28 JP 213588/99; 1999/7/28 JP 213589/99; 1999/3/30 JP 88635/99
International: C08J9/00;C08L23/12
Applicant(s) Name: Sumitomo Chemical Co., Ltd.
Inventor(s) Name: Noden Mitsuki;Kuroda Kamekiyoshi
Patent Agency Code: 72001
Patent Agent: wang jihao
Abstract The present invention provides a process for producing a foamed resin article, the process comprising: a step (the first step) of impregnating any one crystalline thermoplastic resin or resin composition containing, as an elementary ingredient, a crystalline thermoplastic resin selected from a certain group, under an elevated pressure which is not lower than the critical pressure of a substance with which the selected crystalline thermoplastic resin or resin composition is to be impregnated, with a fluid of the substance, and a step (the second step) of releasing the resin or resin composition impregnated with the substance from the foregoing pressurized condition in a period of less than 10 seconds.