公开(公告)号：US5258156A

公开(公告)日：1993-11-02

申请号：US741927

申请日：1991-08-08

申请人： Hiroshi Kurauchi ,  Tetsuo Akazawa

发明人： Hiroshi Kurauchi ,  Tetsuo Akazawa

IPC分类号： B29C55/00 ,  B29C55/06 ,  B29C67/20 ,  B29C71/00

CPC分类号： B29C55/065 ,  B29C55/005 ,  C08J5/18 ,  B29K2023/00 ,  B29K2105/04 ,  C08J2323/12 ,  Y10S264/73

摘要： A process for producing a microporous stretched polyolefin film having a large number of micropores, whereby an unstretched polyolefin film is stretched to predetermined strain amount at a constant stretching temperature by using different strain rates in the initial stage to the final stage. A microporous polyolefin film obtained by the above process can retain a film state even at the melting point or higher temperatures when the film is fixed at the periphery.

公开(公告)号：US06627346B1

公开(公告)日：2003-09-30

申请号：US09709623

申请日：2000-11-10

申请人： Masayuki Kinouchi ,  Tetsuo Akazawa ,  Takashi Oe ,  Ryuichiro Kogure ,  Kenji Kawabata ,  Yuuji Nakakita

发明人： Masayuki Kinouchi ,  Tetsuo Akazawa ,  Takashi Oe ,  Ryuichiro Kogure ,  Kenji Kawabata ,  Yuuji Nakakita

IPC分类号： H01M216

CPC分类号： H01M2/1686 ,  H01M2/166 ,  H01M10/0525

摘要： A battery separator favorably employable for lithium secondary battery comprises at least one porous film in which 100 to 40,000 ppm of particles of silicon dioxide, aluminum oxide, magnesium oxide, zinc oxide or metal oxides containing at least two metal elements selected from the group consisting of Si, Al, Mg and Zn having a mean diameter of 0.1 to 10 &mgr;m are dispersed in a porous resin matrix.

摘要翻译： 优选用于锂二次电池的电池隔板包括至少一个多孔膜，其中100至40,000ppm的二氧化硅，氧化铝，氧化镁，氧化锌或金属氧化物的颗粒含有至少两种选自以下的金属元素： 将平均直径为0.1〜10μm的Si，Al，Mg，Zn分散在多孔树脂基体中。