Japan Vilene Company, Ltd.

Yoshiaki Kawatsu

Yasuhiro Ito

Hiroaki Yamazaki

Koichi Kato

Masanao Tanaka

Kazuya Sato

Masaki Hirooka

Takashi Tokiwa

Etsuroh Nakao

An alkaline battery separator comprising a fiber sheet containing, on outer surfaces of fibers forming a surface of the fiber sheet, a substance having a peak of a bond energy at 530.5 to 531.5 eV which is measured by an X-ray photoelectron spectrometer at a photoelectron-taking-off angle of about 30&deg;; a fiber sheet containing a larger amount of carboxyl groups bonded to surfaces of fibers forming an inside of the fiber sheet than an amount of carboxyl groups bonded to outer surfaces of fibers forming a surface of the fiber sheet; or a fiber sheet capable of entrapping ammonia in an amount of 0.4 mmol/g or more in average is disclosed.

Alkaline battery separator and process for producing the same

A filter material comprising a base material carrying thereon polyvinyl alcohols formed by cross-linking photosensitive polyvinyl alcohols having a quaternized nitrogen-containing aromatic heterocyclic group is disclosed.

Filter material

Growing community of inventors

Ibaraki, Japan

Yoshiaki Kawatsu