发明名称 |
Polypropylene Film and Laminated Material Thereof |
摘要 |
A polypropylene film comprising 70-90 wt. % polymer (a), 2-10 wt. % polymer (b), 2-10 wt. % polymer (c) and 3-20 wt. % polymer (d) and having a haze of 8-30% (wherein the polymer (a) is a block copolymer prepared by producing a polymer part (component a1) by polymerizing in a first step monomers composed mainly of propylene in the absence of an inert solvent and producing an ethylene/propylene copolymer part (component a2) in a second step by polymerization subsequently carried out in a gas phase; the polymer (b) is an ethylene-based polymer having a density of 0.91-0.97 g/cm<SUP>3 </SUP>and a melt flow rate of 5-30 g/10 min; the polymer (c) is an ethylene/alpha-olefin random copolymer having a density of 0.86-0.90 g/cm<SUP>3 </SUP>and a melt flow rate of 0.3-5 g/10 min; and the polymer (d) comprises two or more propylene-based polymers different in molecular weight from each other).
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申请公布号 |
US2008213519(A1) |
申请公布日期 |
2008.09.04 |
申请号 |
US20050791866 |
申请日期 |
2005.11.28 |
申请人 |
TORAY ADVANCED FILM CO., LTD.;SUMITOMO CHEMICAL COMPANY, LIMITED. |
发明人 |
MATSUURA YOICHI;TAKEUCHI MASANORI;KATAOKA KOUJI;NOZAWA HIROSHI |
分类号 |
B32B27/32;A22C13/00;B32B15/08;C08L23/06;C08L23/08;C08L23/12;C08L23/14 |
主分类号 |
B32B27/32 |
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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