Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Separator – retainer – spacer or materials for use therewith
Patent
1978-11-09
1981-07-21
Bell, James J.
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Separator, retainer, spacer or materials for use therewith
428288, 428296, 428297, 428303, 428903, H01M 216
Patent
active
042799791
ABSTRACT:
A substrate for an alkaline battery separator is made of a light weight, porous, heat bonded, synthetic organic sheet material having a basis weight of less than about 35 gsm and a thickness of less than about 200 microns. The major fibrous component is synthetic pulp comprising thermoplastic polyolefin fibers having a prefused microfibrillar structure similar to wood pulp. The minor fibrous component is a high tenacity polyamide fiber having a fiber length greater than about 6 mm. The heat bonding by partial fusion of the microfibrillar polyolefin is sufficient to impart to the sheet material a wet tensile strength of at least 400 g/in. width while permitting retention of air permeability of about 100 liters per minute and more. The substrate exhibits excellent receptivity to impregnation by pore-forming battery separator coatings and is particularly well suited for use in nickel-zinc batteries.
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Benson Arthur L.
Jordan David A.
Bell James J.
The Dexter Corporation
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