TW290595B

Polybenzoxazole or polybenzothiazole polymer dopes are spun through a spinneret having an orifice density of more than 0.25 per cm2 to form filaments. The filaments formed then pass through an air gap which has a gas flowing into it at a temperature of between about 5 DEG C. to about 100 DEG C. and...

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Bibliographic Details
Main Authors TIMOTHY L. FALEY, CHIEGUN CHAU
Format Patent
LanguageChinese
Published 11.11.1996
Subjects
APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS
CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS
NATURAL OR ARTIFICIAL THREADS OR FIBRES
SPINNING
TEXTILES
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Summary:Polybenzoxazole or polybenzothiazole polymer dopes are spun through a spinneret having an orifice density of more than 0.25 per cm2 to form filaments. The filaments formed then pass through an air gap which has a gas flowing into it at a temperature of between about 5 DEG C. to about 100 DEG C. and at a flow rate between about 0.1 meters/second and about 2.0 meters/second. The filaments cool in the air gap and are then coagulated. During or after coagulation the filaments are combined into one or more fibers. By this method of controlling the temperature in the air gap it is possible to stably spin polybenzoxazole or polybenzothiazole fibers at relatively high final line speeds.
Bibliography:Application Number: TW199382110453