Title:
多孔性ポリオレフィンフィルム、電池用セパレータおよび二次電池
Document Type and Number:
Japanese Patent JP6973605
Kind Code:
B2
Abstract:
The present invention relates to a porous polyolefin film in which the peak temperature of tan δ of the dynamic viscoelasticity thereof measured at a frequency of 1 Hz, a temperature increase rate of 5°C/minute, and a strain rate of 0.1%/second is 105°C or greater in at least one of the MD direction (machine direction) and the TD direction (transverse direction). This porous polyolefin film is not prone to short circuiting due to foreign matter even when reduced in thickness, and also has excellent shape stability against high temperature or high tension.
Inventors:
Ryuta Nakajima
Hiroko Tanaka
Naoki Toyoda
Takuya Kuma
Takeshi Ishihara
Hiroko Tanaka
Naoki Toyoda
Takuya Kuma
Takeshi Ishihara
Application Number:
JP2020188034A
Publication Date:
December 01, 2021
Filing Date:
November 11, 2020
Export Citation:
Assignee:
TORAY INDUSTRIES,INC.
International Classes:
C08J9/00; B29C67/20; H01M50/409; H01M50/417; H01M50/489; H01M50/491; H01M50/494
Domestic Patent References:
| JP2012197349A | ||||
| JP2012092302A | ||||
| JP2016040386A |
Attorney, Agent or Firm:
Patent business corporation glory patent office