发明申请
- 专利标题： MICROPOROUS POLYETHYLENE MEMBRANE, ITS PRODUCTION METHOD, AND BATTERY SEPARATOR
- 专利标题（中）： 微波聚乙烯薄膜及其生产方法和电池分离器
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申请号： US12066965申请日： 2006-09-14
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公开(公告)号： US20090269656A1公开(公告)日： 2009-10-29
- 发明人: Kotaro Takita , Shintaro Kikuchi , Kazuhiro Yamada , Teiji Nakamura , Koichi Kono
- 申请人： Kotaro Takita , Shintaro Kikuchi , Kazuhiro Yamada , Teiji Nakamura , Koichi Kono
- 申请人地址： JP Minato-ku, Tokyo
- 专利权人： TONEN CHEMICAL CORPORATION
- 当前专利权人： TONEN CHEMICAL CORPORATION
- 当前专利权人地址： JP Minato-ku, Tokyo
- 优先权： JP2005-271046 20050916; JP2006-248582 20060913
- 国际申请： PCT/JP2006/318303 WO 20060914
- 主分类号： H01M2/16
- IPC分类号： H01M2/16 ; B32B3/26 ; C08J9/00
摘要：
A microporous polyethylene membrane made of a polyethylene resin having a ratio (mass-average molecular weight/number-average molecular weight) of 5 to 300 and comprising 1% or more by mass of ultra-high-molecular-weight polyethylene having a mass-average molecular weight of 7×105 or more, the microporous polyethylene membrane comprising (a) a coarse-structure layer having an average pore diameter of more than 0.04 μm, which is formed on at least one surface, and (b) a dense-structure layer having an average pore diameter of 0.04 μm or less, an area ratio of the coarse-structure layer to the dense-structure layer in a membrane cross section being 0.1 to 0.8.