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Title:
COMPOSITE POROUS MEMBRANE AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2012/029698
Kind Code:
A1
Abstract:
Provided is a composite porous membrane that achieves both superior adhesion of a heat-resistant resin layer and a low amount of air permeation resistance increase, even if the composite porous membrane, such as a battery separator, is made much thinner in the future. In the composite porous membrane used as a battery separator, a porous membrane (B) containing a polyamide resin containing an isophorone structure at an amine component is layered on a porous membrane (A) comprising a polyolefin resin. In that wherein porous membrane A falls within a particular range of thicknesses, average pore sizes, and porosities and the composite porous membrane as a whole falls within a particular range of thicknesses, the composite porous membrane is characterized by further falling within a particular range of delamination strengths at the interface between porous membrane A and porous membrane B, and a particular range of differences between the air permeation resistance of porous membrane A and the air permeation resistance of the composite porous membrane as a whole.

Inventors:
MIZUNO NAOKI (JP)
IRIE MICHIHIKO (JP)
AYUZAWA YOSHITAKA (JP)
NAKAMURA MASANORI (JP)
Application Number:
PCT/JP2011/069409
Publication Date:
March 08, 2012
Filing Date:
August 29, 2011
Export Citation:
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Assignee:
TORAY INDUSTRIES (JP)
MIZUNO NAOKI (JP)
IRIE MICHIHIKO (JP)
AYUZAWA YOSHITAKA (JP)
NAKAMURA MASANORI (JP)
International Classes:
C08J9/28; B32B5/18; B32B27/32; H01M50/403; H01M50/417; H01M50/423; H01M50/449; H01M50/491
Domestic Patent References:
WO2008149895A12008-12-11
WO2006123798A12006-11-23
Foreign References:
JP2005314635A2005-11-10
JP2009283273A2009-12-03
JP2009087562A2009-04-23
JP2007125821A2007-05-24
JPH10249974A1998-09-22
JP2007095575A2007-04-12
JP2010052237A2010-03-11
JP2004139867A2004-05-13
Attorney, Agent or Firm:
KAZAHAYA, Nobuaki et al. (JP)
Nobuaki Kazahaya (JP)
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Claims:



 
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