发明名称 |
Polypropylene resin foam-molded article |
摘要 |
Provided is a polypropylene resin foam-molded article which has a rib having a relatively small thickness and which has an improved strength at a boundary part between a main body part and the rib part without increasing a thickness of the rib part. The polypropylene resin foam-molded article is obtained by molding a material for a foam-molded article using a polypropylene resin, wherein the molded article comprises a main body part and a rib part provided vertically to the main body part; the rib part has a thickness (Tr) of 3 mm or less, or a thickness ratio (Tr/Tb) of a thickness of the rib part (Tr) to a thickness of the main body part (Tb) is 0.8 or less; the main body part and the rib part each comprise a non-foamed surface layer and an intermediate layer having a foamed structure; and the intermediate layer in the main body part is connected to the intermediate layer in the rib part. It is molded from the material for a foam-molded article using a polypropylene resin in which a melt flow rate and a melt tension satisfy a fixed relation.
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申请公布号 |
US6783844(B2) |
申请公布日期 |
2004.08.31 |
申请号 |
US20020196192 |
申请日期 |
2002.07.17 |
申请人 |
CHISSO CORPORATION;CHISSO PETROCHEMICAL CORPORATION |
发明人 |
KUGIMIYA YOUICHI;HONDA KOUICHI |
分类号 |
C08J9/04;B29C44/04;B29C45/00;B29C45/26;C08J9/00;C08L23/12;(IPC1-7):B32B5/20;B32B3/00 |
主分类号 |
C08J9/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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