Process for producing separator for batteries, the separator for batteries, and alkaline storage batteries using the same

摘要

The present invention relates to the separator for batteries wherein the non-woven cloth comprising fibers mainly composed of polyolefin type resin is provided with hydrophilic property on the fiber surface at least by sulfuric compound and characterized as follows: (a) the ratio of atomic mass of sulfur to atomic mass of carbon (S/C) is 5x10-3 to 30x10-3 (b) the tensile strength is not less than 3 kg/cm2 and the preparation method of this separator. The present invention also relates to the secondary batteries using this separator.