Battery separator manufacturing process

Battery separators and the like are produced from non woven mats of thermoplastic fibers which fibers contain an internal wetting agent that is relatively insoluble in battery electrolite and tends to bloom under conditions of use. After preliminary formation the nonwoven mat is heated and then comp...

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Bibliographic Details
Main Authors PALMER; NIGEL INNES, SUGARMAN; NATHAN
Format Patent
LanguageEnglish
Published 20.01.1976
Subjects
BASIC ELECTRIC ELEMENTS
BRAIDING
COTTON-WOOL
ELECTRICITY
FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS
KNITTING
LACE-MAKING
MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL
NON-WOVEN FABRICS
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
TEXTILES
TRIMMINGS
WADDING
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Summary:Battery separators and the like are produced from non woven mats of thermoplastic fibers which fibers contain an internal wetting agent that is relatively insoluble in battery electrolite and tends to bloom under conditions of use. After preliminary formation the nonwoven mat is heated and then compressed to increase the effectiveness of the wetting agent. The fibers may be formed from polypropylene resin that is treated at unusually high temperatures prior to extrusion and the extrudate attenuated, collected on a drum and compressed to form a preferred separator with small pores and high porosity.
Bibliography:Application Number: US19740537052