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 JP6642214
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a multilayer porous film having excellent heat-shrinkage characteristics at the time of heat generation from a battery, which is important from a standpoint of safety while having an excellent air-permeability contributing to performance of the battery when used as a battery separator.SOLUTION: There is provided a laminated porous film which is formed of at least three layers where a polypropylene-based resin porous layer (I layer), and a heat resistant layer (II layer) containing 20-80 pts.mass of a polypropylene-based resin and 80-20 pts.mass of inorganic particles are laminated in order of the II layer/I layer/II layer, and a coefficient of dynamic friction of the surface of the II layer to a polyethylene terephthalate film having arithmetic average roughness Ra of 0.3 μm or less, which is measured according to JIS K7125 (1999), is 0.6 or more.SELECTED DRAWING: Figure 1
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Inventors:
Masayuki Seo
Hiroto Yamada
Takatoshi Muta
Tomoyuki Nemoto
Hiroto Yamada
Takatoshi Muta
Tomoyuki Nemoto
Application Number:
JP2016073851A
Publication Date:
February 05, 2020
Filing Date:
April 01, 2016
Export Citation:
Assignee:
Mitsubishi Chemical Corporation
International Classes:
B32B27/32; B32B27/18; H01M2/16
Domestic Patent References:
| JP2008255202A | ||||
| JP2015018813A | ||||
| JP2008254288A | ||||
| JP2012014914A |
Foreign References:
| WO2013035622A1 |
Attorney, Agent or Firm:
Tsuyoshi Shigeno
Takayuki Shigeno
Takayuki Shigeno