发明名称 |
Method for producing transparent polypropylene based sheet and transparent polypropylene based sheet |
摘要 |
The present invention relates to a transparent polypropylene based sheet and its manufacturing method capable of: providing proper properties as a transparent sheet such as tensile characteristic, impact resistance, rigidity and little generation of whitening when being folded as well as maintaining transparency; preventing generation of a gum-like material in molding; and realizing continuous production. A manufacturing machine 1 includes: an extruding unit 11 for melting and kneading a raw material and extruding the material into a sheet-like shape; a first cooling unit 12 for cooling the melted sheet-like resin composition 20a to obtain a sheet (sheet-like article) 20; a preheating unit 13 for reheating the sheet 20; a heat treatment unit 14 for heat-treating the sheet-like resin composition 20; and a second cooling unit 15 for cooling the heat-treated sheet 20. The raw material of a resulting sheet 21 contains a polypropylene resin (a) and a metallocene-type ethylene-α-olefin copolymer (b).
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申请公布号 |
US7691306(B2) |
申请公布日期 |
2010.04.06 |
申请号 |
US20050594126 |
申请日期 |
2005.03.24 |
申请人 |
IDEMITSU UNITECH CO., LTD. |
发明人 |
FUNAKI AKIRA;AKAMATSU MASAHIRO;YAMAGUCHI SHIGEKI;MORI KENICHI;KITAJIMA TOMOYUKI |
分类号 |
B29C47/88;B28B3/20;B29C47/08;B29C47/14;B29C71/02;C08J5/18;C08J7/00;C08L23/00;C08L23/04;C08L23/08;C08L23/10;C08L23/12 |
主分类号 |
B29C47/88 |
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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