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Title:
SEPARATOR FOR ALKALINE BATTERY
Document Type and Number:
Japanese Patent JP3914331
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To stably manufacture a battery, which has excellent electrolyte holding property, tensile strength of fiber, tearing strength, rigidity and softness, by forming a separator of a non-woven fabric, in which total thickness of a mixture layers formed of short fibers having a fiber length less than a specified value and long fibers having a fiber length at a specified value or more exceeds a specified ratio to the thickness of the whole of the non-woven fabric.
SOLUTION: A mixture layer of short fibers and long fibers is formed by forming a layered product of a fiber web (short fiber web) of short fiber having a fiber length at 1 mm or more and less than 25 mm and a fiber web (long fiber web) of long fibers having a fiber length at 25 mm or more, and performing at least one slip processing to this layered product. At least one mixture layer like this is included, and total thickness thereof is set at 1/3 or more to the thickness of the whole of the non-woven fabric, and polyolefin base remarkably narrow fiber is included in this non-woven fabric so as to improve the electrolyte holding property. Generation of short-circuit due to a projection of a burr of pole plates through the separator is prevented.


Inventors:
Masanao Tanaka
Nobutoshi Tokutake
Application Number:
JP12405098A
Publication Date:
May 16, 2007
Filing Date:
April 17, 1998
Export Citation:
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Assignee:
Japan Vilene Co., Ltd.
International Classes:
H01M2/16; D04H5/00; D04H13/00; H01M2/18; H01M6/06; H01M10/24; H01M12/06; (IPC1-7): H01M2/16; D04H5/00; D04H13/00; H01M2/18; H01M6/06; H01M10/24; H01M12/06
Domestic Patent References:
JP8273650A
JP5074440A
JP3230473A
JP7026457A
Attorney, Agent or Firm:
Kenichi Morita
Kenjiro Yamaguchi



 
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