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Title:
ポリオレフィン微多孔膜
Document Type and Number:
Japanese Patent JP5097817
Kind Code:
B2
Abstract:

To provide a polyolefin microporous film attempting to reduce heat shrinkage while maintaining and improving property balance.

The polyolefin microporous film comprises a polyolefin (A) having a weight average molecular weight of 1×106-15×106or a polyolefin composition (B) comprising the polyolefin, and having a porosity of >1,200 and ≤2,000 sec/100 cc, and a heat shrinkage of 2.0% or less in the TD direction and a heat shrinkage of 6% or less in the MD direction.

COPYRIGHT: (C)2011,JPO&INPIT


Inventors:
Soichiro Yamaguchi
Nogata Tetsuro
Kaimai Education
Kotaro Takita
Koichi Kono
Application Number:
JP2010262233A
Publication Date:
December 12, 2012
Filing Date:
November 25, 2010
Export Citation:
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Assignee:
Toray Battery Separator Film Co., Ltd.
International Classes:
C08J9/26; H01M2/16
Domestic Patent References:
JP1160789A
Attorney, Agent or Firm:
Kenji Kawabi