Method of manufacturing hollow fiber
AssigneeNippon Zeon Co., Ltd.
InventorsYasushi Joh, Akihiko Niina, Noriaki Kaneko, Toshio Sano, Noriyuki Ichige, Koji Ichikawa, Akira Fukutome, Hisako Sonobe
Life of this patent
Estimating the term…
Abstract
A method of manufacturing a hollow fiber in which a spinning solution of cellulose ester dissolved into an organic solvent is extruded from an annular slit, and simultaneously a core liquid is introduced into the inside hollow portion of the extruded spinning solution, the core liquid being selected from the group of hydroxycarboxylic acid, derivative of hydroxycarboxylic acid, monoterpene or these mixture, or consisting of a solution of the above-described compound or mixture.
Claims9
In a method of manufacturing a hollow fiber characterized in that a spinning solution consisting essentially of cellulose ester dissolved in an organic solvent is extruded from an annular slit of an orifice while simultaneously introducing a core liquid into the inside hollow portion of the extruded spinning solution, the improvement comprising:
- (a) using a monoterpene or a solution of the monoterpene as core liquid;
- and (b) incorporating into the spinning solution a component which renders the monoterpene or the solution of the monoterpene nonmiscible with the spinning solution and develops phase separation therebetween.
Dependencies are inferred from the claim text.