Nonwoven fibrous substrate for battery separator

Details Nonwoven fibrous substrate for battery separator Nonwoven fibrous substrate for battery separator

H - Electricity

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319/58

H01M 2/14 (2006.01) H01M 2/16 (2006.01)

Patent

CA 1118040

1 Abstract of the Disclosure 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 thermo- plastic 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 ex- hibits excellent receptivity to impregnation by pore-form- ing battery separator coatings and is particularly well suited for use in nickel-zinc batteries.

336780

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