公开(公告)号：US20120273114A1

公开(公告)日：2012-11-01

申请号：US13547850

申请日：2012-07-12

申请人： Kotaro TAKITA TAKITA ,  Shintaro KIKUCHI ,  Junko TAKITA

发明人： Kotaro TAKITA TAKITA ,  Shintaro KIKUCHI ,  Junko TAKITA

IPC分类号： B32B5/18

CPC分类号： H01M2/1653 ,  B29C47/0021 ,  B29C47/8805 ,  B29C47/8845 ,  B29C47/90 ,  B29C47/906 ,  B29C55/065 ,  B29C55/12 ,  B29K2023/0683 ,  B29K2105/0061 ,  B29K2105/0088 ,  B29K2105/04 ,  C08L23/06 ,  C08L23/10 ,  C08L2205/02 ,  Y10T428/249978 ,  C08L2666/06

摘要： A multi-layer, microporous polyolefin membrane comprising first microporous layers constituting at least both surface layers, and at least one second microporous layer disposed between both surface layers, the first microporous layer comprising a first polyethylene resin containing 8% or more by mass of ultra-high-molecular-weight polyethylene having a weight-average molecular weight of 1×106 or more, the second microporous layer comprising a second polyethylene resin containing 7% or less by mass of the ultra-high-molecular-weight polyethylene, and having a structure in which a pore diameter distribution curve obtained by mercury intrusion porosimetry has at least two peaks, and the total thickness of the first microporous layers being 15-60% per 100% of the total thickness of the first and second microporous layers.

摘要翻译： 一种多层微孔聚烯烃膜，其包括构成至少两个表面层的第一微孔层和设置在两个表面层之间的至少一个第二微孔层，所述第一微孔层包含含有8质量％或更多的超微结构的第一聚乙烯树脂 重均分子量为1×10 6以上的高分子量聚乙烯，所述第二微孔层包含含有超过所述超高分子量聚乙烯7质量％以下的第二聚乙烯树脂，并且具有 其中通过水银侵入孔隙率法获得的孔径分布曲线具有至少两个峰，并且第一微孔层的总厚度相对于第一和第二微孔层的总厚度的100％为15-60％。