Method of making a separator material for a storage battery

Details Method of making a separator material for a storage battery Method of making a separator material for a storage battery

1991-11-20

1993-05-25

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 83, 264103, 264136, 264233, 264344, 427189, 4272481, 427340, 427400, 4274123, 427254, B05D 302, B32B 700, B32B 3100

Patent

active

052137228

ABSTRACT:
A method for making a separator material which is useful as a separator for storage batteries. The method involves applying a sulfonated surface layer to polyolefin resin fibers which form a woven or non-woven fabric. According to one embodiment, polyolefin resin fibers made of a first polyolefin resin are coated with a surface layer of a second polyolefin resin which is more susceptible to sulfonation than the first polyolefin resin from which said fibers are made. At the stage when the polyolefin fibers are coated with the second polyolefin resin they may be either individual fibers or formed into a woven or non-woven fabric. Thereafter, the fibers are subjected to a sulfonation process until the surface layer is sulfonated and a decomposition product formed by the sulfonation process is then removed from the fibers to obtain a separator material.

REFERENCES:
patent: 2964584 (1960-12-01), Mendelsohn et al.

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