Bulky synthetic pulp sheet useful as a separator for sealed lead

Details Bulky synthetic pulp sheet useful as a separator for sealed lead Bulky synthetic pulp sheet useful as a separator for sealed lead

1994-03-18

1995-07-25

Bell, James J.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Separator, retainer, spacer or materials for use therewith

162146, 1621575, 162207, 428131, 428288, 4283044, 428323, 428327, 429247, H01M 216

Patent

active

054360943

ABSTRACT:
A bulky synthetic pulp sheet which does not lose its shape even after having absorbed a liquid and has excellent resistance against to chemicals such as acids and alkalis, and a process for preparing the same, which pulp sheet contains 5 to 95% by weight of a synthetic pulp having a drainage factor over a range of from 0.1 to 2.0 sec/g, and 5 to 50% by weight of a polymer binder having a melting point lower than a melting point or a decomposition temperature of said synthetic pulp, the sheet being obtained by subjecting a mixture of the synthetic pulp and fibrous binder to wet laid sheet-making followed by a heat treatment, and having an apparent density of 0.15 g/cm.sup.3 or smaller under the load of 200 g/cm.sup.2.

REFERENCES:
patent: 2999788 (1961-09-01), Morgan
patent: 3007840 (1961-11-01), Wilcox
patent: 5139861 (1992-08-01), Williams et al.
patent: 5167764 (1992-12-01), Nielsen
patent: 5284703 (1994-02-01), Everhart et al.
patent: 5292581 (1994-03-01), Viazmensky
patent: 5300192 (1994-04-01), Hansen
patent: 5324575 (1994-06-01), Sultze et al.

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