FIBER USING OLEFIN RESIN, NONWOVEN FABRIC USING SAME, AND SEPARATOR FOR ALKALI STORAGE BATTERY

摘要

Provided is an inexpensive nonwoven fabric separator for an alkali storage battery, said separator being capable of ensuring stable spinning and restraining self-discharge due to the excellent ability thereof to capture ammonia. A high stability in spinning can be ensured by spinning a resin that comprises, as a fiber, a maleic anhydride-denatured polyolefin in such an amount as to give a maleic anhydride content of 3.5-35 mass%, a crystalline polyolefin, and 1.0 mass% or more of a low-crystalline polyolefin. By employing a nonwoven fabric using the aforesaid fiber as a separator of an alkali storage battery, a high-level ability to capture ammonia can be exhibited and self-discharge can be restrained.