Alkaline battery separator and process for producing the same

摘要

An alkaline battery separator comprising a hydrophilic nonwoven fabric obtainable by heat-fusing and hydro-entangling (1) polyolefin dividable composite fibers having an average fiber length of 20 to 60 mm, (2) high-strength fibers having an average fiber length of 30 to 60 mm and a fiber strength of 5 g/denier or more, and (3) polyolefin heat-sensitive-adhesive fibers having an average fiber length of 30 to 60 mm, to obtain a heat-fused and hydro-entangled nonwoven fabric, and imparting a hydrophilic property to the resulting heat-fused and hydro-entangled nonwoven fabric; these high-strength fibers accounting for 20 to 45 mass % with respect to a total mass of the polyolefin dividable composite fibers, the high-strength fibers and the polyolefin heat-sensitive-adhesive fibers, and a process for producing the separator are disclosed. The alkaline battery separator exhibits an excellent breaking strength, and has practical and sufficient tensile strength and electrolyte-holding capacity properties.