Alkaline battery separator and process for producing the same

Details Alkaline battery separator and process for producing the same Alkaline battery separator and process for producing the same

1998-03-31

2000-02-29

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Separator, retainer, spacer or materials for use therewith

429254, 427222, 264260, H01M 216

Patent

active

060307277

ABSTRACT:
An alkaline battery separator comprising a hydrophilic nonwoven fabric obtainable from a fiber web prepared by a wet-laid method from (1) dividable composite fibers capable of producing polyolefin fine fibers, (2) high-strength fibers having a single-fiber strength of 5 g/denier or more, and (3) fusible fibers containing at least on a surface thereof a resin component having a melting point lower than a melting point of the dividable composite fibers and lower than a melting point of the high-strength fibers: by dividing the dividable composite fibers, entangling the fibers, and fusing the fusible fibers, to obtain a heat-fused and entangled nonwoven fabric, and imparting a hydrophilic property to the resulting heat-fused and entangled nonwoven fabric; wherein an average fiber length of the constituent fibers of the hydrophilic nonwoven fabric is 10 mm or more, is disclosed. The alkaline battery separator according to the present invention exhibits an excellent electrolyte-holding capacity, tensile strength, tear strength and bending resistance, and can be used to stably prepare a battery. An electrode flash rarely penetrates the separator to thereby cause a short circuit between electrodes.

REFERENCES:
patent: 4264691 (1981-04-01), O'Rell et al.
patent: 5354617 (1994-10-01), Ikkanzaka et al.
patent: 5609976 (1997-03-01), Ueda et al.

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