Title:
MICROPOROUS POLYOLEFIN FILM, SEPARATOR FOR BATTERY, AND SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2021/065585
Kind Code:
A1
Abstract:
The present invention pertains to a microporous polyolefin film, wherein formula 1 is satisfied on at least one surface thereof by: the ratio S(800_60°)/S(500_60°) of the reflectivity S(800_60°) of S waves of reflected light when light having a wavelength of 800nm is incident on the surface at an angle of incidence of 60° to the reflectivity S(500_60°) of S waves of reflected light when light having a wavelength of 500nm is incident on said surface at the same angle of incidence; and the SEM surface hole number measured by observation with a scanning electron microscope. Formula 1: SEM surface hole number≥366×S(800/500)-380. Herein, S(800/500)=S(800_60°)/S(500_60°).
Inventors:
ISHIHARA TAKESHI (JP)
SAKAMOTO MITSUTAKA (JP)
TOYOTA NAOKI (JP)
NAKASHIMA RYOTA (JP)
FUJIWARA SATOSHI (JP)
OHKURA MASATOSHI (JP)
SAKAMOTO MITSUTAKA (JP)
TOYOTA NAOKI (JP)
NAKASHIMA RYOTA (JP)
FUJIWARA SATOSHI (JP)
OHKURA MASATOSHI (JP)
Application Number:
PCT/JP2020/035606
Publication Date:
April 08, 2021
Filing Date:
September 18, 2020
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
C08J9/00; C08J9/26; H01M50/409
Domestic Patent References:
| WO2019151220A1 | 2019-08-08 | |||
| WO2018180714A1 | 2018-10-04 | |||
| WO2018180713A1 | 2018-10-04 | |||
| WO2018043335A1 | 2018-03-08 |
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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