Nippon Zeon Company, Ltd.

Shigehiko Oikawa

Masahiro Yamazaki

Yasushi Joh

Noriaki Kaneko

Yoshihiro Makuta

Chizuko Hayashi

A method of manufacturing a microporous hollow fiber having a high permeability to water characterized in that a spinning solution of (A) polyacrylonitrile, (B) an acrylonitrile copolymer, or (C) an admixture of (A) and (B) in an organic solvent is extruded from an annular slit, while simultaneously extruding an organic core liquid which is a solvent for (A), (B) and (C) or a swelling agent capable of swelling them from an orifice encircled by the annular slit and introducing the extruded spinning solution with the core liquid into an aqueous coagulating bath to coagulate the spinning solution to form the hollow fiber.

Method of manufacturing hollow fiber

A method of manufacturing a hollow fiber includes the steps of:

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Sagamihara, Japan

Shigehiko Oikawa