Title:
積層多孔性フィルム、電池用セパレータ及び電池
Document Type and Number:
Japanese Patent JP5727747
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a laminated porous film which has, when used as a battery separator, a shutdown characteristic which is important from the viewpoint of securing safety, while maintaining an excellent permeation characteristic which contributes to electric performance, and is also excellent in pinprick strength.SOLUTION: The laminated porous film has a structure in which an A layer composed of a porous layer including a polypropylene-base resin composition as a main component and a B layer composed of a porous layer including a polyethylene-based resin composition as a main component are alternately laminated. The film includes at least five or more of the B layers, and has β-activity.
Inventors:
Tomoyuki Nemoto
Application Number:
JP2010223781A
Publication Date:
June 03, 2015
Filing Date:
October 01, 2010
Export Citation:
Assignee:
Mitsubishi Plastics Co., Ltd.
International Classes:
B32B27/32; B32B5/32; H01M2/16
Domestic Patent References:
| JP2010120217A | ||||
| JP2010111096A | ||||
| JP2010111095A | ||||
| JP2008311220A | ||||
| JP9117959A |
Attorney, Agent or Firm:
Tamotsu Otani