PRODUCTION OF POLYBENZAZOLE FIBER AND POLYBANZAZOLE INTERMEDIATELY DRIED FIBER

PROBLEM TO BE SOLVED: To enable high-speed drying of polybenzazole filaments without damaging to the filaments by coagulating the filaments spun from the dope, washing them with water and drying them under specific conditions. SOLUTION: The spinning dope of a polybenzazole mainly constituted with st...

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Bibliographische Detailangaben
Hauptverfasser:	TERAMOTO YOSHIHIKO, KITAGAWA SUSUMU, ISHITOBI MICHIO
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY NATURAL OR ARTIFICIAL THREADS OR FIBRES ORGANIC MACROMOLECULAR COMPOUNDS SPINNING TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To enable high-speed drying of polybenzazole filaments without damaging to the filaments by coagulating the filaments spun from the dope, washing them with water and drying them under specific conditions. SOLUTION: The spinning dope of a polybenzazole mainly constituted with structural units of formula I to formula III in a solvent (preferably polyphosphoric acid) is extruded from a spinneret and coagulated through the air gap in the coagulation bath into filaments, which are then washed with water. On the drying, more than 80% of the heating zone is kept at >=240 deg.C and the filaments are dried to some