COMPOSITE POROUS FILM AND METHOD FOR PRODUCING SAME

Title:

COMPOSITE POROUS FILM AND METHOD FOR PRODUCING SAME

Document Type and Number:

WIPO Patent Application WO/2012/029699

Kind Code:

A1

Abstract:

Provided is a composite porous film having both adhesiveness in a resin layer with superior heat resistance and a low degree of increase in air resistance. In this composite porous film, a porous film (B) containing a heat resistant resin is laminated on the surface of a polypropylene resin in the outermost layer of a porous film (A) formed from at least one layer and having at least one outermost layer formed from a polypropylene resin. The composite porous film is characterized by satisfying a specific range of peel strength at the interface between the porous film (A) and the porous film (B) as well as a specific range for the difference between the air resistance of the composite porous film as a whole and the air resistance of the porous film (A) when the porous film (A) satisfies a specific range of pore size and porosity.

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Inventors:

MIZUNO NAOKI (JP)
IRIE MICHIHIKO (JP)
AYUZAWA YOSHITAKA (JP)
NAKAMURA MASANORI (JP)

Application Number:

PCT/JP2011/069410

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:

B32B5/18; B32B27/32; B32B27/34; C08J9/28; H01M50/403; H01M50/414; H01M50/417; H01M50/423; H01M50/489; H01M50/491

Foreign References:

JP2007125821A	2007-05-24
JP2006289657A	2006-10-26
JP2010021033A	2010-01-28
JP2005281668A	2005-10-13
JP2001266942A	2001-09-28
JP2003171495A	2003-06-20
JP2001023602A	2001-01-26
JP2007125821A	2007-05-24

Other References: