Title:
ポリオレフィン製積層多孔質膜、それを用いた電池用セパレータおよびそれらの製造方法
Document Type and Number:
Japanese Patent JP6558363
Kind Code:
B2
Abstract:
Considering that battery separators will require further thinner materials and lower costs in the future, a production method for a multi-layer polyolefin porous membrane for laminating a modified porous layer, which has an exceptionally high peel strength to a modified porous layer, and is suitable for high-speed processing during slit process and battery assembly process, and a battery separator, on which the modified porous layer is laminated, is provided. The produced multi-layer polyolefin porous membrane comprises at least two layers; protrusions made of polyolefin satisfying 5 µm ¤ W ¤ 50 µm (where W is a protrusion size) and 0.5 µm ¤ H (where H is a protrusion height) and being irregularly disposed on one side of the multi-layer polyolefin porous membrane at a density of not less than 3 protrusions/cm 2 and not more than 200 protrusions/cm 2 ; the meltdown temperature being not lower than 165°C; the air permeation resistance being not greater than 300 sec/100 cc Air; and the membrane thickness being not greater than 20 µm.
Inventors:
Masami Sugada
Koichi Matano
Naoki Mizuno
Koichi Matano
Naoki Mizuno
Application Number:
JP2016517884A
Publication Date:
August 14, 2019
Filing Date:
April 28, 2015
Export Citation:
Assignee:
TORAY INDUSTRIES,INC.
International Classes:
B32B27/32; B32B5/32; H01M50/406; H01M50/417; H01M50/449; H01M50/491; H01M50/494
Domestic Patent References:
| JP2010537845A | ||||
| JP9039075A | ||||
| JP6218323A | ||||
| JP60104837U |
Foreign References:
| WO2013146585A1 |