Title:
LAMINATED POROUS FILM, AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2015/083591
Kind Code:
A1
Abstract:
This laminated porous film is obtained by laminating, with a modified porous layer (A), one surface of a polyolefin porous film, and laminating, with a modified porous layer (B), an opposite surface of the polyolefin porous film. The polyolefin porous film has a film thickness of not more than 25 µm, and has protrusions which comprise polyolefin, which satisfy 5 µm ≤ W ≤ 50 µm (W being the size of the protrusions) and 0.5 µm ≤ H (H being the height of the protrusion), and which are irregularly dispersed on both surfaces of the polyolefin porous film at a density in the range of 3/cm2 to 200/cm2 inclusive per surface. At least the modified porous layer (A) includes inorganic particles and a binder having a tensile strength of at least 5 N/mm2. The peel strength between the polyolefin porous film and the modified porous layers is extremely high, and thus the laminated porous film is suitable for high-speed processing.
Inventors:
MIZUNO NAOKI (JP)
MATANO KOICHI (JP)
MATANO KOICHI (JP)
Application Number:
PCT/JP2014/081253
Publication Date:
June 11, 2015
Filing Date:
November 26, 2014
Export Citation:
Assignee:
TORAY BATTERY SEPARATOR FILM (JP)
International Classes:
B32B5/32; B29C48/08; B29C48/305; B29C55/16; B32B27/32; H01M50/417; H01M50/42; H01M50/423; H01M50/426; H01M50/429; H01M50/451; H01M50/457; H01M50/491; H01M50/494; B29K23/00; B29L9/00
Domestic Patent References:
| WO2005022674A1 | 2005-03-10 | |||
| WO2013146342A1 | 2013-10-03 | |||
| WO2007049568A1 | 2007-05-03 | |||
| WO2011118735A1 | 2011-09-29 |
Foreign References:
| JP2007106992A | 2007-04-26 | |||
| JP2012119225A | 2012-06-21 |
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