Title:
POLYOLEFIN MICROPOROUS MEMBRANE, SEPARATOR FOR BATTERIES, AND METHODS RESPECTIVELY FOR PRODUCING SAID MEMBRANE AND SAID SEPARATOR
Document Type and Number:
WIPO Patent Application WO/2017/169488
Kind Code:
A1
Abstract:
It has been difficult to provide a porous layer having a uniform thickness on a wide and thin polyolefin microporous membrane by the conventional coating techniques. The present invention provides: a polyolefin microporous membrane on which a porous layer having little fluctuations in thickness can be provided suitably; and a separator for batteries, which can adapt to the increase in capacity of a battery. A polyolefin microporous membrane having a range of fluctuation in a F25 value in the width direction of 1 MPa or less, a thickness of 3 μm or more and less than 7 μm and a width of 100 mm or more (wherein the term "F25 value" refers to a value produced by dividing the value of a load applied to a test specimen upon the stretching of the test specimen at a stretching ratio of 25% using a tension tester by the value of a cross-sectional area of the test specimen).
Inventors:
MIZUNO NAOKI (JP)
SUGATA MASAMI (JP)
SUGATA MASAMI (JP)
Application Number:
PCT/JP2017/008135
Publication Date:
October 05, 2017
Filing Date:
March 01, 2017
Export Citation:
Assignee:
TORAY BATTERY SEPARATOR FILM (JP)
TORAY INDUSTRIES (JP)
TORAY INDUSTRIES (JP)
International Classes:
C08J9/28; B32B27/32; C08J5/18; C08J7/043; H01M50/403; H01M50/406; H01M50/417; H01M50/449; H01M50/489; H01M50/491
Domestic Patent References:
| WO2015146580A1 | 2015-10-01 | |||
| WO2012150618A1 | 2012-11-08 | |||
| WO2014192862A1 | 2014-12-04 |
Foreign References:
| JP5845381B1 | 2016-01-20 | |||
| JPH06247615A | 1994-09-06 | |||
| JP2011526547A | 2011-10-13 | |||
| JP2012500130A | 2012-01-05 |
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