公开(公告)号：EP3085531A1

公开(公告)日：2016-10-26

申请号：EP15800063.8

申请日：2015-05-28

申请人： Toray Battery Separator Film Co., Ltd.

发明人： MIURA, Yukiko ,  MITSUOKA, Hideto ,  KUBOTA, Takashi

IPC分类号： B32B27/32 ,  C08J9/00 ,  C08L23/06 ,  C08L23/12 ,  H01M2/16 ,  H01M10/0525

CPC分类号： H01M2/1653 ,  B01D67/002 ,  B01D67/0027 ,  B01D67/003 ,  B01D69/12 ,  B01D71/26 ,  B01D2313/12 ,  B01D2325/04 ,  B01D2325/22 ,  B01D2325/24 ,  B01D2325/34 ,  B32B27/08 ,  B32B27/32 ,  B32B2307/308 ,  B32B2307/581 ,  B32B2307/744 ,  B32B2457/10 ,  C08J9/00 ,  C08L23/06 ,  C08L23/12 ,  C08L2203/20 ,  C08L2205/02 ,  C08L2207/062 ,  C08L2207/068 ,  H01M2/16 ,  H01M2/1686 ,  H01M10/0525 ,  Y02T10/7011 ,  C08L23/10

摘要： To provide a polyolefin multilayer microporous membrane and a battery separator having excellent mechanical strength and heat resistance.
The present invention is a polyolefin multilayer microporous membrane having at least three layers, the membrane comprising a first microporous layer composed of a polyethylene resin containing an ultrahigh molecular weight polyethylene (surface layers) and a second microporous layer composed of a polyolefin rein containing a high-density polyethylene and polypropylene (intermediate layer), wherein (I) the pin puncture strength is at least 25 g/µm, (II) the coefficient of static friction with respect to a metal foil is at least 0.40, and (III) the meltdown temperature is at least 180°C.