PITCH FOR CARBON FIBER

PURPOSE:The titled pitch that is made by treating a pitch containing a specific amount of the optically anisotropic region with sulfur, thus giving carbon fiber of high strength and high elasticity, because of its improved melting characteristics and uniform spinnability. CONSTITUTION:A pitch contai...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	HIROSE TAKAO, KATOU OSAMU, KAMIMURA SEIICHI, YAMAMOTO SHIYUNICHI, TAKASHIMA HIROAKI
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 FUELS LUBRICANTS METALLURGY NATURAL OR ARTIFICIAL THREADS OR FIBRES PEAT PETROLEUM, GAS OR COKE INDUSTRIES PYROLIGNEOUS ACID SPINNING TECHNICAL GASES CONTAINING CARBON MONOXIDE TEXTILES WORKING-UP PITCH, ASPHALT, BITUMEN, TAR
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	PURPOSE:The titled pitch that is made by treating a pitch containing a specific amount of the optically anisotropic region with sulfur, thus giving carbon fiber of high strength and high elasticity, because of its improved melting characteristics and uniform spinnability. CONSTITUTION:A pitch containing 5-35wt% of the optically anisotropic region (which is obtained by heat treating coal or petroleum pitch at normal or reduced pressure, preferably at 370-420 deg.C) is combined with 0.5-10wt% of sulfur and treated, preferably at normal or elevated pressure at 200-350 deg.C for 10min to 2hr to obtain the objective pitch. Further, the resultant pitch is melt-spun into pitch fiber, which is preoxidized in an oxidative gas atmosphere at 20-300 deg.C for 5min to 10hr, carbonized in an inert gas atmosphere at 800-2,500 deg.C for 0.5- 10hr and graphitized at 2,500-3,500 deg.C for 1sec to 1hr to give carbon fiber.