Title:
ポリオレフィン製微多孔膜及びその評価方法
Document Type and Number:
Japanese Patent JP4780960
Kind Code:
B2
Abstract:
The invention relates to a microporous membrane, which is provided with high safety even under a condition that the interior temperature of a battery becomes high, and which has high permeability and high mechanical strength at the same time. The polyolefin microporous membrane is characterized by a membrane thickness of 5 to 50 mu m, a void content of 30 to 60%, a gas transmission rate of 40 to 300 sec/100cc/20 mu m, a piercing strength of not less than 2.5 N/20 mu m and a break through temperature of not lower than 110 DEG C. The separator in accordance with the present invention is used to exhibit high safety under a high temperature condition as well as high permeability, and therefore it is particularly useful as a separator for miniaturized high capacity batteries of a non-aqueous electrolytic solution type.
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Inventors:
Adachi
Takashi Ikemoto
Hiroshi Togawa
Takashi Ikemoto
Hiroshi Togawa
Application Number:
JP2004532709A
Publication Date:
September 28, 2011
Filing Date:
August 26, 2003
Export Citation:
Assignee:
Asahi Kasei E-materials Co., Ltd.
International Classes:
C08J9/26; B01D65/10; B01D67/00; B01D69/02; B01D71/26; G01N3/00; G01N3/08; H01M50/417; H01M50/489; H01M50/491; H01M50/403; H01M50/406
Domestic Patent References:
| JP11322989A | ||||
| JP93228A | ||||
| JP1160789A | ||||
| JP20012813A | ||||
| JP2001256491A |
Foreign References:
| WO1993012920A1 |
Attorney, Agent or Firm:
Yoshio Narui
Hideo Takei
Yoshiaki Matsui
Hideo Takei
Yoshiaki Matsui