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：US5691047A

公开(公告)日：1997-11-25

申请号：US440075

申请日：1995-05-12

申请人： Hiroshi Kurauchi ,  Tetuo Akazawa ,  Akira Kawabata

发明人： Hiroshi Kurauchi ,  Tetuo Akazawa ,  Akira Kawabata

IPC分类号： B32B27/32 ,  H01M2/16 ,  B32B3/26

CPC分类号： H01M2/1686 ,  B32B27/32 ,  H01M2/1653 ,  Y10T428/249979 ,  Y10T428/24998 ,  Y10T428/249981 ,  Y10T428/31917

摘要： A porous multi-layer film favorably employable as a separator film for a nonaqueous electric battery comprises at least three united polyolefin layers, in which at least one polyolefin layer is a polyethylene layer and at least one polyolefin layer is a polypropylene layer which is placed in contact with the polyethylene layer. The polyolefin layers are combined to form a united structure with a peel strength of at least 3 g/15 mm and has a pore volume of 30-80%, a maximum pore size of 0.02-2 .mu.m, a shutdown temperature of 135.degree.-140.degree. C., and a thermal durability to maintain the shutdown condition up to at least 180.degree. C.

摘要翻译： 可用作非水电池隔膜的多孔多层膜包括至少三个一体的聚烯烃层，其中至少一个聚烯烃层是聚乙烯层，并且至少一个聚烯烃层是放置在聚烯烃层中的聚丙烯层 与聚乙烯层接触。 将聚烯烃层组合形成具有至少3g / 15mm剥离强度的结合结构，孔体积为30-80％，最大孔径为0.02-2μm，关闭温度为135℃ -140℃，并且具有耐热性以将关闭状态保持在至少180℃。