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Patent Searching and Data


Title:
BATTERY SEPARATOR AND BATTERY USING THE SAME
Document Type and Number:
Japanese Patent JP3678081
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a battery separator having excellent liquid retaining property and sufficient nonwoven fabric strength, and capable of contributing to enhancement of a battery capacity without lowering a battery life, and to obtain a battery having excellent battery characteristics such as improved self discharge.
SOLUTION: Extra fine fibers are formed by dividing a divided compound fiber by applying a high pressure water flow treatment to a wet nonwoven fabric formed by mixing 15-60 wt.% of a divided compound fiber having a methyl pentene polymer as a first component 1 and a polyolefine polymer or its copolymer as a second component 2, 20-60 wt.% of a polyolefine compound fiber composed of a component with a high fusing point and a component with a low fusing point, and less than 40 wt.% of other synthetic fibers, and are entangled each other. After they are dried by a thermal treatment and component fibers are thermally adhered by the component with a low fusing point in the polyolefine compound fiber, a battery separator is obtained by applying a treatment to make them hydrophilic such as a sulfonation treatment.


Inventors:
Yamamoto, Hiroyuki
Sano, Toyohiko
Hori, Shuji
Tanaka, Tomofumi
Kida, Tatsunobu
Application Number:
JP1999000312084
Publication Date:
August 03, 2005
Filing Date:
November 02, 1999
Export Citation:
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Assignee:
DAIWABO CO LTD
International Classes:
H01M2/16; D04H1/4291; D04H1/4382; D06M11/00; D06M11/55; D21H15/10; D06M101/00; D06M101/16; D06M101/18; D06M101/20; (IPC1-7): H01M2/16; D04H1/42; D06M11/55; D21H15/10
Domestic Patent References:
JP11297295A
JP10266052A
JP9085873A
JP10031990A
JP5186911A
JP10284042A
Attorney, Agent or Firm:
河宮 治
鮫島 睦
玄番 佐奈恵