초록 ▼

A process for producing a hollow fiber membrane, a hollow fiber membrane, and a dialyzer of hollow fiber membrane type is provided. The hollow fiber membrane is highly biocompatible, and the production process is quite simple and inexpensive. In the process of the invention, the hollow fiber membran

A process for producing a hollow fiber membrane, a hollow fiber membrane, and a dialyzer of hollow fiber membrane type is provided. The hollow fiber membrane is highly biocompatible, and the production process is quite simple and inexpensive. In the process of the invention, the hollow fiber membrane is produced in a system wherein a polymer-containing spinning solution is extruded from a tube-in-tube type orifice of a spinner in a coagulation solution to form the hollow fiber membrane. The polymer-containing spinning solution is extruded from the outer tube of the orifice to form a cylindrical filament having an inner bore and a core solution is ejected from the inner tube of the orifice into the inner bore of the filament for coagulation of the filament. The filament is directly extruded into the coagulation solution or extruded into air and then drawn to the coagulation solution. The core solution is supplemented with a hydrophobic modifier such as vitamin E and a surfactant and the resulting hollow fiber membrane contains the hydrophobic modifier on its inner surface.

대표청구항 ▼

[ We claim:] [1.] A process for producing a hollow fiber membrane by extruding a polymer-containing spinning solution from a tube-in-tube type orifice of a spinner into a coagulation solution to form the hollow fiber membrane, comprising the step ofextruding the polymer-containing spinning solution

[ We claim:] [1.] A process for producing a hollow fiber membrane by extruding a polymer-containing spinning solution from a tube-in-tube type orifice of a spinner into a coagulation solution to form the hollow fiber membrane, comprising the step ofextruding the polymer-containing spinning solution from the outer tube of the orifice to form a cylindrical filament having an inner bore while ejecting a coagulative core solution from the inner tube of the orifice into the inner bore of the filament;wherein the filament is directly extruded into the coagulation solution or extruded into air and then drawn to the coagulation solution, andwherein said coagulative core solution contains more than 20% of water, and said coagulative core solution is supplemented with at least one hydrophobic modifier selected from the group consisting of a fat-soluble vitamin, a fatty acid and a fish oil; and a surfactant and the resulting hollow fiber membrane contains the hydrophobic modifier on its inner surface.