PRODUCTION OF CARBON FIBER

PURPOSE:To produce a carbon fiber excellent in opening properties suitable for producing prepreg with good productivity. CONSTITUTION:This method for producing carbon fiber is to continuously burn carbonized fiber yarn while applying 1.5-10kgf/mm tension thereto in subjecting pitch fiber using mesop...

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Bibliographische Detailangaben
Hauptverfasser:	MIURA KUNIO, NISHIKAWA YOSHITOSHI, ARAI YUTAKA
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 COMPOUNDS THEREOF FUELS INORGANIC CHEMISTRY LUBRICANTS METALLURGY NATURAL OR ARTIFICIAL THREADS OR FIBRES NON-METALLIC ELEMENTS PEAT PETROLEUM, GAS OR COKE INDUSTRIES PYROLIGNEOUS ACID SPINNING TECHNICAL GASES CONTAINING CARBON MONOXIDE TEXTILES WORKING-UP PITCH, ASPHALT, BITUMEN, TAR
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Beschreibung
Zusammenfassung:	PURPOSE:To produce a carbon fiber excellent in opening properties suitable for producing prepreg with good productivity. CONSTITUTION:This method for producing carbon fiber is to continuously burn carbonized fiber yarn while applying 1.5-10kgf/mm tension thereto in subjecting pitch fiber using mesophase pitch as a raw material to the oxidizing treatment in an oxidizing gas atmosphere containing nitrogen dioxide and oxygen, burning the resultant oxidized fiber at >=350 to =10min in an inert atmosphere, then continuously carbonizing the obtained fiber at 800-1250 deg.C temperature, thereby providing carbon fiber yarn having >=15kgf/mm breaking strength thereof and carrying out the graphitization of the carbonized fiber yarn so as to afford 1500 deg.C final temperature.