Polybenzazole fiber and method for production thereof

Details Polybenzazole fiber and method for production thereof Polybenzazole fiber and method for production thereof

1997-09-30

1999-11-30

Edwards, Newton

Stock material or miscellaneous articles

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

Rod, strand, filament or fiber

428394, D02G 300

Patent

active

059939630

ABSTRACT:
A polybenzazole fiber characterized by having an elastic modulus of not less than 1350 g/d and requiring not longer than 10 minutes to reduce its water content from 2.0% to 1.5%, when determined using a thermogravimetric analyzer at 110.degree. C. after moisture absorption of not less than 2.0% of a fiber, and a method for manufacturing such a polybenzazole fiber, comprising extruding a spinning dope comprising polybenzazole and a polyphosphoric acid from a spinneret to give a dope filament, and cooling the dope filament to not more than 50.degree. C., followed by coagulation and washing. According to the method of the present invention, a polybenzazole fiber showing less decrease in strength by rapid heating can be provided.

REFERENCES:
patent: 4847350 (1989-07-01), Harris
patent: 5273703 (1993-12-01), Alexander et al.
patent: 5288452 (1994-02-01), Yabuki
patent: 5411694 (1995-05-01), Alexander et al.
patent: 5429787 (1995-07-01), Im et al.
patent: 5527609 (1996-06-01), Yabuki et al.
patent: 5756031 (1998-05-01), Tani
patent: 5772942 (1998-06-01), Teramoto et al.
patent: 5780152 (1998-07-01), Ichiryu et al.

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