Title:
POROUS FILM, SEPARATOR FOR SECONDARY BATTERIES, AND SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2020/195948
Kind Code:
A1
Abstract:
[Problem] The purpose of the present invention is to provide, at low cost, a separator for secondary batteries, which sufficiently exhibits the characteristics of a porous layer by having excellent adhesion between the porous layer and a porous base material, and which has excellent battery characteristics. [Solution] A porous film which is obtained by superposing a porous layer that contains a heat-resistant resin having no melting point or a melting point of 200°C or higher on at least one surface of a porous base material that is formed of a polyolefin, and which is configured such that: the porous layer has a porosity of from 50% to 80% (inclusive) and a strength of 0.4 N/10 mm or more; and the strength of the porous layer is lower than the adhesion strength between the porous layer and the porous base material formed of a polyolefin as determined by a 180 degree peel test in the longitudinal direction.
Inventors:
IKOMA KEI (JP)
KAI NOBUYASU (JP)
TSUKUDA AKIMITSU (JP)
KAI NOBUYASU (JP)
TSUKUDA AKIMITSU (JP)
Application Number:
PCT/JP2020/011079
Publication Date:
October 01, 2020
Filing Date:
March 13, 2020
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B32B5/22; B32B27/32; H01M50/409; H01M50/489
Domestic Patent References:
| WO2017170288A1 | 2017-10-05 | |||
| WO2017130574A1 | 2017-08-03 | |||
| WO2015182689A1 | 2015-12-03 | |||
| WO2007052663A1 | 2007-05-10 |
Foreign References:
| JP2017039250A | 2017-02-23 | |||
| JP2010113804A | 2010-05-20 | |||
| JP2010067450A | 2010-03-25 | |||
| JP2009249477A | 2009-10-29 | |||
| JP2008106237A | 2008-05-08 | |||
| JP2010123465A | 2010-06-03 | |||
| JP2016130027A | 2016-07-21 | |||
| JP2002216734A | 2002-08-02 | |||
| JP2009231281A | 2009-10-08 |
Other References:
See also references of EP 3950300A4
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