Process for manufacturing regenerated cellulose hollow fiber

Details Process for manufacturing regenerated cellulose hollow fiber Process for manufacturing regenerated cellulose hollow fiber

1979-08-28

1983-06-14

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

2105002, 2642093, 2642108, 264561, 428398, B29D 2700

Patent

active

043882560

ABSTRACT:
A regenerated cellulose hollow fiber exhibiting a good cellulose II crystalline structure and an exchanged wet strength/wet elongation ratio 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.

REFERENCES:
patent: 3423491 (1969-01-01), McLain et al.
patent: 3546209 (1970-12-01), Lipps
patent: 3724672 (1973-04-01), Leonard et al.
patent: 3888771 (1975-06-01), Isuge et al.
patent: 4035459 (1977-07-01), Kesting
patent: 4127625 (1978-11-01), Arisaka et al.
patent: 4219517 (1980-08-01), Kesting
Text Res. J., vol. 19, No. 7, pp. 381-392, 7-1949.

Affiliated with

Also associated with

Rating

Process for manufacturing regenerated cellulose hollow fiber does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for manufacturing regenerated cellulose hollow fiber, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for manufacturing regenerated cellulose hollow fiber will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-163294