发明授权
- 专利标题: Microporous polyolefin film
- 专利标题(中): 微孔聚烯烃膜
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申请号: US12111121申请日: 2008-04-28
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公开(公告)号: US07700025B2公开(公告)日: 2010-04-20
- 发明人: Daisuke Inagaki , Takahiko Kondo
- 申请人: Daisuke Inagaki , Takahiko Kondo
- 申请人地址: JP Tokyo
- 专利权人: Asahi Kasei Chemicals Corporation
- 当前专利权人: Asahi Kasei Chemicals Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
- 优先权: JP2003-366601 20031027
- 主分类号: B28B1/00
- IPC分类号: B28B1/00 ; B29C43/00 ; B29C61/00
摘要:
A microporous polyolefin film which comprises 5 to 95 wt. % polyethylene (A) having a viscosity-average molecular weight (Mv) of 2,000,000 or higher, a first-melting-peak signal height as determined by DSC (differential scanning calorimetry) of 3.0 mW/mg or higher, a specific surface area of 0.7 m2/g or larger, and an average particle diameter of 1 to 150 μm and 95 to 5 wt. % polyethylene (B) having an Mw of 10,000 to 200,000, excluding 10,000 and 200,000, wherein the ratio of the Mv of the compound (A) to that of the compound (B), (A)/(B), is 10 or higher, the film as a whole has a molecular weight of 300,000 to 1,500,000, and the film has a fuse temperature of 120 to 140° C., a breaking temperature of 150° C. or higher, and a ratio of the piercing strength at 25° C. to the piercing strength at 140° C. of from 0.01 to 0.25.
公开/授权文献
- US20080290552A1 MICROPOROUS POLYOLEFIN FILM 公开/授权日:2008-11-27
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