PRODUCTION OF PITCH CARBON YARN

PURPOSE:To obtain the titled yarn providing carbon yarn having high characteristics economically and stably without using an outer heater, by providing an extrusion face of yarn of a spinneret with radiation heat and subjecting pitch to melt spinning while keeping the extrusion face at high temperat...

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Bibliographische Detailangaben
Hauptverfasser:	KAKIKURA EISAKU, FUKAO TAKAHISA, KISUMINO KUNIO
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 MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING TEXTILES
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain the titled yarn providing carbon yarn having high characteristics economically and stably without using an outer heater, by providing an extrusion face of yarn of a spinneret with radiation heat and subjecting pitch to melt spinning while keeping the extrusion face at high temperature. CONSTITUTION:Firstly, the spinning pitch 3 is subjected to melt spinning while providing the extrusion face of yarn of the spinneret 1 having the spinning nozzle 2 with radiation heat usually by the infrared heater 5, to give the pitch yarn 6. Then, the yarn is subjected to infusible treatment, carbonized and optionally graphitized, to give the aimed yarn. Infrared rays are preferably used as a radiation source and the amount of heat provided on the extrusion face of yarn is preferably 0.7-1.2watt/cm . Further, the spinning pitch of raw material contains preferably >=70% optically anisotropic texture.