Process for the preparation of polybenzazole staple fiber

Details Process for the preparation of polybenzazole staple fiber Process for the preparation of polybenzazole staple fiber

1994-12-28

1996-12-17

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

With step of cooling to a temperature of zero degrees c. or...

264143, 26421115, 26421116, 264233, D01D 526, D01D 1006, D01F 674

Patent

active

055850529

ABSTRACT:
The invention is a process for the preparation of polybenzazole staple fibers which includes extruding a solution of polybenzazole polymer to form a dope filament, cutting the dope filament to a desired length, and washing and drying the cut filament. It has been discovered that the process of the invention provides a suitable means to prepare staple fibers which does not require the cutting of washed, rigid polybenzazole filaments.

REFERENCES:
patent: 4963298 (1990-10-01), Allen et al.
patent: 5163348 (1990-11-01), Kitada et al.
patent: 5164131 (1992-11-01), Chau et al.
patent: 5273703 (1993-12-01), Alexander et al.

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