Title:
POROUS POLYPROPYLENE FILM, SEPARATOR FOR ELECTRICITY STORAGE DEVICES, AND ELECTRICITY STORAGE DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/187326
Kind Code:
A1
Abstract:
Provided are: a porous polypropylene film which has low separator resistance and high surface modulus of elasticity, thereby exhibiting excellent coatability for a functional layer such as a heat-resistant protective layer and excellent suitability for battery assembly processes; a separator for electricity storage devices; and an electricity storage device. A porous polypropylene film of the present invention is mainly composed of a polypropylene resin, and satisfies formula (1).
(TMD + TTD)/R ≥ 450 formula (1)
(In formula (1), TMD represents the modulus of elasticity (MPa) in the longitudinal direction; TTD represents the modulus of elasticity (MPa) in the transverse direction; and R represents the separator resistance (Ω) per a thickness of 25 μm.)
Inventors:
IKOMA KEI (JP)
WAKAHARA YOKO (JP)
OHKURA MASATOSHI (JP)
WAKAHARA YOKO (JP)
OHKURA MASATOSHI (JP)
Application Number:
PCT/JP2013/065839
Publication Date:
December 19, 2013
Filing Date:
June 07, 2013
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
C08J9/00; H01G9/02; H01G11/52; H01M50/417; H01M50/489
Domestic Patent References:
| WO2005103127A1 | 2005-11-03 |
Foreign References:
| JPH02311539A | 1990-12-27 | |||
| JPS63199742A | 1988-08-18 | |||
| JPS62195030A | 1987-08-27 |
Attorney, Agent or Firm:
SAKAI, HIROAKI (JP)
Hiroaki Sakai (JP)
Hiroaki Sakai (JP)
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