Cellulose acetate hollow fiber and method for making same

D - Textiles – Paper – 01 – D

Patent

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18/15, 18/616

D01D 5/24 (2006.01) C08J 9/28 (2006.01) D01F 2/28 (2006.01)

Patent

CA 1107020

IMPROVED CELLULOSE ACETATE HOLLOW FIBER AND METHOD FOR MAKING SAME Abstract Of The Disclosure An improved cellulose acetate semi-permeable hollow fiber suitable for use in artificial kidneys and a process for making same with selectively controllable permeability characteristics which provide superior water and solute clearances, higher tensile strength and resistance to fiber breakage during fiber processing and assembly, and which possess the capacity to remove blood solutes such as urea creatine uric acid and water at rates which are higher than prior art cellulose capilliary fibers. The new fibers are made from a novel spin melt composition which can be melt spun into stronger hollow fibers with permeability characteristics enhanced by controlled post spin processing steps and the permeability varied and controlled by adjusting relative quantities of each of three constituents.

306020

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