Crimped polybenzazole staple fiber and manufacture thereof

Details Crimped polybenzazole staple fiber and manufacture thereof Crimped polybenzazole staple fiber and manufacture thereof

1995-04-20

1996-06-18

Edwards, N.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Staple length fiber

428394, 528377, 528313, 528321, 528182, D02C 300

Patent

active

055276091

ABSTRACT:
Crimped polybenzazole staple fibers which satisfy the following specifications at the same time:
(1) 2.ltoreq.number of crimps (number/inch).ltoreq.40
(2) 2.ltoreq.crimp index (%).ltoreq.30
(3) 0.3.ltoreq.crimp index
umber of crimps.ltoreq.3.0; methods for manufacturing crimped polybenzazole staple fibers; and the rotary cutter therefor. The crimped polybenzazole staple fibers of the present invention are superior in crimp property and are useful for manufacturing spun yarn and unwoven fabric. According to the method of the present invention, crimped polybenzazole staple fibers superior in spinnability can be manufactured with ease. In addition, the cutting blade of the present invention stands a long time use for manufacturing staple fibers from a continuous filaments tow of high tenacity fibers.

REFERENCES:
patent: 4359567 (1982-11-01), Evers
patent: 4533692 (1985-08-01), Wolfe et al.
patent: 4533693 (1985-08-01), Wolfe et al.
patent: 4533724 (1985-08-01), Wolfe et al.
patent: 4544576 (1985-10-01), Chu et al.
patent: 4578432 (1986-03-01), Teai et al.
patent: 4703103 (1987-10-01), Wolfe et al.
patent: 4772678 (1988-09-01), Sybert et al.
patent: 4847350 (1989-07-01), Harris
patent: 5089591 (1992-02-01), Gregory et al.
patent: 5393478 (1995-02-01), Sen et al.

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