LAYERED POLYOLEFIN MICROPOROUS MEMBRANE, SEPARATOR FOR BATTERIES, AND METHODS FOR MANUFACTURING SAME

WIPO Patent Application WO/2017/061489

A1

The present invention provides a layered polyolefin microporous membrane which has excellent shutdown characteristics and is suited to provide a uniform thickness to a porous layer. The present invention further provides a separator for batteries, which is suited to increase the capacity of a battery and which is obtained by forming a porous layer having a uniform thickness in a layered polyolefin microporous membrane. The layered polyolefin microporous membrane having a length of 1000 m or longer, includes a first polyolefin microporous membrane and a second polyolefin microporous membrane, wherein the shutdown temperature is 128-135°C, the air resistance increase rate at 30-105°C is less than 1.5 sec/100ccAir/°C per a thickness of 20 μm, and the variation width of an F25 value in the lengthwise direction is 1 MPa or less. (Here, the F25 value represents a value obtained by dividing, by the cross-sectional area of a test piece, the load value at which the test piece is elongated by 25% by using a tensile testing machine.)

JP3861472	DECORATIVE SHEET
JP4979353	Composite foam molded product

MIZUNO NAOKI (JP)
SUGATA MASAMI (JP)

PCT/JP2016/079663

April 13, 2017

October 05, 2016

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TORAY BATTERY SEPARATOR FILM (JP)

B32B27/32; H01M50/403; H01M50/417; H01M50/443; H01M50/449; H01M50/489

WO2007046226A1	2007-04-26
WO2013080701A1	2013-06-06

JP2010108753A	2010-05-13
JP2011181195A	2011-09-15
JP2011023186A	2011-02-03
JP2012500130A	2012-01-05
JP5914790B1	2016-05-11
JP5914789B1	2016-05-11

See also references of EP 3211693A4

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