Patent ID: 6355375
Filing Date: 2002-03-12
Classification: D01F,D04H,H01M,Y02E

Abstract:
An alkaline battery separator comprising a non-woven fabric containing at least one mixture layer obtained by entangling short fibers and long fibers with a fluid jet, whereinthe fiber length of said short fibers is from 1 mm to less than 25 mm, the fiber length of said long fibers is at least 25 mm, the total thickness of all of said mixture layers accounts for not less than one-third of the whole thickness of said non-woven fabric, the lengthwise tear strength of the non-woven fabric is at least 20 N/50 mm, and the non-woven fabric consists essentially of: (1) polyolefin fine short fibers, polyolefin fine long fibers, or a mixture thereof, (2) high strength short fibers, high strength long fibers, or a mixture thereof having a single-fiber strength of at least 5 g/denier, and (3) fusible short fibers, fusible long fibers, or a mixture thereof having at least on a surface thereof a resin component, the resin component having a melting lower than a melting point of the polyolefin fine fibers and lower than a melting point of the high strength fibers.