Dry-jet wet spinning of fibers including two steps of stretching

Details Dry-jet wet spinning of fibers including two steps of stretching Dry-jet wet spinning of fibers including two steps of stretching

1991-09-12

1993-08-10

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

2642107, 26421115, 26421116, D01D 506, D01D 512

Patent

active

052346510

ABSTRACT:
A method of making a fiber involves the sequential steps of: a) extruding as a stream a solution of a polymer having a polymer concentration of 4-24 weight % into a non-coagulating fluid; b) stretching the stream while in the non-coagulating fluid at a spinning draft of 25-2000; c) increasing the polymer concentration by at least 2 weight % to a concentration of 20-65 weight %; e) stretching the stream at a stretch ratio of 1.5-10; and f) increasing the polymer concentration in the stream sufficiently to form a fiber.

REFERENCES:
patent: 3414645 (1968-12-01), Morgan, Jr.
patent: 3574811 (1971-04-01), Jamison
patent: 3767756 (1973-10-01), Blades
patent: 4263245 (1981-04-01), Tan
patent: 4342715 (1982-08-01), Shimada et al.
patent: 4344908 (1982-08-01), Smith et al.
patent: 4368615 (1983-01-01), Lammers
patent: 4374977 (1983-02-01), Fujiwara et al.
patent: 4374978 (1983-02-01), Fujiwara et al.
patent: 4466935 (1984-08-01), Bair et al.
patent: 4466935 (1984-08-01), Bair et al.
patent: 4606875 (1986-08-01), Chenevey et al.
patent: 4728473 (1988-03-01), Satoh et al.
patent: 4876040 (1989-10-01), Park et al.
patent: 5023035 (1991-06-01), Yang
patent: 5047500 (1991-09-01), Park et al.
Fibres From Synthetic Polymers, Rowland Hill, Ed. Aug. 1953 pp. 382-387.
M. Panar et al., "Morpholoy of Poly(p-Phenylene Terephthalamide) Fibers," Journal of Polymer Science: Polymer Physics Ed., vol. 21, pp. 1955-1969 (1983).
L.-S. Li et al., "On the Morphology of Aromatic Polyamide Fibers (Kevlar, Kevlar-49, and PRD-49)," J. Macrol. Sci.-Phys., B 22(2), pp. 269-290 (1983).

Affiliated with

Also associated with

Rating

Dry-jet wet spinning of fibers including two steps of stretching does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dry-jet wet spinning of fibers including two steps of stretching, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dry-jet wet spinning of fibers including two steps of stretching will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1723509