Selectively permeable hollow fiber membrane and process for prod

Details Selectively permeable hollow fiber membrane and process for prod Selectively permeable hollow fiber membrane and process for prod

1997-04-18

2000-01-11

Fortuna, Ana

Liquid purification or separation

Filter

Material

21050029, 21050031, 21050032, 21032171, 21032187, 264200, B01D 3900

Patent

active

060131829

ABSTRACT:
A selectively permeable hollow fiber membrane for blood dialysis consisting substantially of a cellulose derivative, which has at least a dense layer on the innermost side and a porous layer of greater void percentage on the outside, and a process for producing the selectively permeable hollow fiber membrane consisting substantially of a cellulose derivative, which comprises extruding a spinning solution containing a polymer consisting substantially of a cellulose derivative dissolved in an organic solvent, from an annular slit into a filamentous form, while simultaneously introducing a core material solution with a water content of at least 50 wt % into the extruded filamentous body, and then immersing the filamentous body into a coagulating solution after passing it through a gas.

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