PRODUCTION OF POLYIMIDE FIBER

PROBLEM TO BE SOLVED: To stably obtain a polyimide fiber having excellent heat resistance, flame retardance, chemical resistance, radiation resistance and dynamic characteristics and suitable as a base material for fiber-reinforced composite materials, etc., by spinning a polyimide having prescribed...

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Bibliographische Detailangaben
Hauptverfasser:	KAKUMOTO KOJI, NAKAMURA TOMONOBU
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 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
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To stably obtain a polyimide fiber having excellent heat resistance, flame retardance, chemical resistance, radiation resistance and dynamic characteristics and suitable as a base material for fiber-reinforced composite materials, etc., by spinning a polyimide having prescribed melting viscosities under specific conditions. SOLUTION: This method for producing a polyimide fiber comprises spinning a polyimide having a melt viscosity of =500 Pa.s at 420 deg.C at a spinning temperature of 380-420 deg.C in a melted state for a retention time of 5-30 min in a distance of 10-100 cm between a spinneret and a bundling position. The polyimide fiber extruded from the spinneret is preferably wound up at a 200-1,500 m/min.