Invention Grant
US06875484B1 MULTI-LAYER EXPANSION-MOLDED ARTICLE OF POLYPROPYLENE RESIN, PRODUCTION PROCESS THEREOF, AND CONTAINER, SHOCK-ABSORBING MATERIAL FOR AUTOMOBILE AND AUTOMOTIVE MEMBER FORMED OF THE MULTI-LAYER EXPANSION-MOLDED ARTICLE OF POLYPROPYLENE RESIN
有权
聚丙烯树脂的多层膨胀成型品及其生产工艺及容器，用于汽车和汽车零部件的多层膨胀成型制品的聚丙烯树脂吸收材料
- Patent Title: MULTI-LAYER EXPANSION-MOLDED ARTICLE OF POLYPROPYLENE RESIN, PRODUCTION PROCESS THEREOF, AND CONTAINER, SHOCK-ABSORBING MATERIAL FOR AUTOMOBILE AND AUTOMOTIVE MEMBER FORMED OF THE MULTI-LAYER EXPANSION-MOLDED ARTICLE OF POLYPROPYLENE RESIN
- Patent Title (中): 聚丙烯树脂的多层膨胀成型品及其生产工艺及容器，用于汽车和汽车零部件的多层膨胀成型制品的聚丙烯树脂吸收材料
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Application No.: US09629949Application Date: 2000-08-01
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Publication No.: US06875484B1Publication Date: 2005-04-05
- Inventor: Naochika Kogure , Hiroyuki Gokuraku , Seiji Takahashi , Daisuke Imanari , Takashi Kitahama
- Applicant: Naochika Kogure , Hiroyuki Gokuraku , Seiji Takahashi , Daisuke Imanari , Takashi Kitahama
- Applicant Address: JP Tokyo
- Assignee: JSP Corporation
- Current Assignee: JSP Corporation
- Current Assignee Address: JP Tokyo
- Agency: Sherman & Shalloway
- Priority: JP11-225346 19990809
- Main IPC: B32B27/00
- IPC: B32B27/00 ; B29C44/04 ; B29C47/04 ; B29C49/04 ; B29C49/22 ; B29C49/48 ; B29L9/00 ; B29L22/00 ; B32B5/18 ; B32B27/32 ; B32B1/00 ; B29B9/00 ; B32B1/08
Abstract:
A multi-layer expansion-molded article of a polypropylene resin, which is obtained by molding a multi-layer parison comprising a foamed resin layer and a resin layer provided on the outer side of the foamed resin layer in a mold in such manner that at least part of the opposed inner surfaces of foamed resin layer in the parison are fusion-bonded to each other, and has a polypropylene resin layer on the surface of a foamed polypropylene resin layer, wherein a melt tension, MTfr (gf) and a melt flow rate, MFRfr (g/10 min) obtained by measurement to a polypropylene resin forming the foamed resin layer in the expansion-molded article satisfy the relationship [log MTfr>−0.74 log MFRfr+0.66], and a melt tension, MTur (gf) and a melt flow rate, MFRur (g/10 min) obtained by measurement to a polypropylene resin forming the resin layer on the surface of the foamed resin layer satisfy the relationship [log MTur>−1.02 log MFRur+0.47].
Information query
