D - Textiles – Paper – 01 – D
Patent
D - Textiles, Paper
01
D
18/15
D01D 5/24 (2006.01)
Patent
CA 1141114
REGENERATED CELLULOSE HOLLOW FIBER AND PROCESS FOR MANUFACTURING SAME ABSTRACT A regenerated cellulose hollow fiber used as a permeable membrane for dialysis and ultrafiltration, which is prepared by hydrolyzing a cellulose ester hollow fiber and characterized as (a) containing a cellulose II crystal structure at a degree of crystallinity of from 40 to 75%, said cellulose II crystal structure having a degree of- crystallite orientation of from 78 to 90% and having a crystallite size of from 60 to 150 angstroms as measured along the fiber axis, and (b) exhibiting a wet strength/wet elongation ratio of from 1.50 to 8Ø The regenerated cellulose hollow fiber is prepared by a process wherein: a dope comprised of cellulose ester in a non-volatile organic solvent is extruded through a circular slit defined between inner and outer tubes of a spinning nozzle having a double tube structure, while a core liquid is forced through the inner tube of said nozzle;the hollow fibrous extrudate is coagulated in a coagulating bath; the coagulated hollow fibrous extrudate is drawn 1.05 to 2.00 times its original length; and then, the drawn hollow fiber still containing a core liquid in the hollow is treated with an aqueous caustic alkali solution containing at least 0.5% by weight of a water soluble metal salt, thereby hydrolyzing the cellulose ester into cellulose.
333930
Ishida Masamichi
Kamada Kensuke
Kamo Jun
Minami Shunsuke
Takemura Toru
Mcfadden Fincham
Mitsubishi Rayon Company Ltd.
LandOfFree
Regenerated cellulose hollow fiber and process for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Regenerated cellulose hollow fiber and process for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Regenerated cellulose hollow fiber and process for... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-2517