公开(公告)号：US20170092920A1

公开(公告)日：2017-03-30

申请号：US15312558

申请日：2015-05-28

Applicant: TORAY BATTERY SEPARATOR FILM CO., LTD.

Inventor： Tomiko MATSUMOTO ,  Masami SUGATA ,  Koichi KONO

IPC: H01M2/16 ,  C08J5/18 ,  H01M2/14 ,  C08J9/28

CPC classification number: H01M2/1653 ,  B01D67/002 ,  B01D67/0027 ,  B01D69/02 ,  B01D71/26 ,  B01D2325/20 ,  B01D2325/22 ,  B01D2325/24 ,  B01D2325/34 ,  B29C47/0021 ,  B29C47/0057 ,  B29C47/16 ,  B29C47/40 ,  B29C47/6087 ,  B29C47/8845 ,  B29C55/005 ,  B29C55/143 ,  B29K2023/0683 ,  B29K2105/041 ,  B29K2995/0065 ,  B29L2031/3468 ,  C08J5/18 ,  C08J9/28 ,  C08J2201/0482 ,  C08J2205/044 ,  C08J2323/06 ,  C08J2423/06 ,  C08L23/06 ,  C08L2207/068 ,  H01M2/145

Abstract: A polyolefin microporous membrane is disclosed. The membrane includes at least one microporous membrane layer, where the microporous membrane layer has an air permeability between about 100 sec/100 cc and about 220 sec/100 cc, a pin puncture strength of at least 550 gf, and a crystallization half time t1/2 of from 10 to 35 minutes when subjected to isothermal crystallization at 117° C. The air permeability and the pin puncture strength are normalized to a thickness of 16 μm.