发明名称 |
Process for producing foamed and molded article of polypropylene resin |
摘要 |
A process for producing a foamed and molded article of a polypropylene resin, which comprises pressurizing preliminarily-foamed particles of an ethylene/propylene copolymer having a melt index value of from 0.1 to 25, a latent heat of crystallization of not more than 28 cal/g and an ethylene content of from 1 to 30% by weight as a base resin with an inorganic gas or a gaseous mixture of the inorganic gas and a volatile blowing agent thereby to impart an elevated pressure to the inside of said particles, thereafter filling said particles in a mold capable of enclosing the particles but allowing escape of gases therefrom, and then heating said particles to expand them to the configuration of the mold.
|
申请公布号 |
US4440703(A) |
申请公布日期 |
1984.04.03 |
申请号 |
US19820405027 |
申请日期 |
1982.08.04 |
申请人 |
JAPAN STYRENE PAPER CORPORATION |
发明人 |
AKIYAMA, HIROYUKI;HIROSAWA, KUNINORI;KUWABARA, HIDEKI |
分类号 |
C08J9/22;B29C44/00;B29C59/00;B29C67/00;C08J9/232;(IPC1-7):B29D27/00 |
主分类号 |
C08J9/22 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|