Zinc-free preparation of rayon fibers

Details Zinc-free preparation of rayon fibers Zinc-free preparation of rayon fibers

1981-07-13

1983-09-20

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264197, D01F 206

Patent

active

044055498

ABSTRACT:
Rayon fibers having high wet modulus, low wet elongation and low caustic solubility are prepared from an unmodified viscose spinning solution by spinning the viscose solution into a zinc-free coagulation bath containing at least 125 g/l of Na.sub.2 SO.sub.4, at least 125 g/l of (NH.sub.4).sub.2 SO.sub.4 and less than 100 g/l of H.sub.2 SO.sub.4 while the bath is at a temperature above 40.degree. C. The coagulated filament is then stretched in a secondary bath maintained at a temperature over 70.degree. C.

REFERENCES:
patent: 1930803 (1933-10-01), Harrison
patent: 2997365 (1961-08-01), Smith et al.
patent: 3097914 (1963-07-01), Lewis
patent: 3720743 (1977-03-01), Stevens et al.
patent: 4242405 (1980-12-01), Bockno

Affiliated with

Also associated with

Rating

Zinc-free preparation of rayon fibers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Zinc-free preparation of rayon fibers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Zinc-free preparation of rayon fibers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-587260