CARBON FIBER, PROCESS FOR PRODUCTION OF POLYACRYLONITRILE-BASE PRECURSOR FIBER FOR CARBON FIBER PRODUCTION, AND PROCESS FOR PRODUCTION OF CARBON FIBER

CARBON FIBER, PROCESS FOR PRODUCTION OF POLYACRYLONITRILE-BASE PRECURSOR FIBER FOR CARBON FIBER PRODUCTION, AND PROCESS FOR PRODUCTION OF CARBON FIBER

A process for the production of polyacrylonitrile-base precursor fiber for carbon fiber production which comprises spinning a spinning dope containing a polyacrylonitrile-base polymer having a limiting viscosity of 2.0 to 10.0 in a concentration of 10 to 25% by weight by a wet spinning method or a d...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ISE, Masafumi, ENDO, Makoto, NAKAYAMA, Isao
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS
CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS
NATURAL OR ARTIFICIAL THREADS OR FIBRES
PERFORMING OPERATIONS
SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR
SHAPING OR JOINING OF PLASTICS
SPINNING
TEXTILES
TRANSPORTING
WORKING OF PLASTICS
WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:A process for the production of polyacrylonitrile-base precursor fiber for carbon fiber production which comprises spinning a spinning dope containing a polyacrylonitrile-base polymer having a limiting viscosity of 2.0 to 10.0 in a concentration of 10 to 25% by weight by a wet spinning method or a dry-wet spinning method, subjecting the obtained fiber to dry and heat treatment, and then steam-stretching the resulting fiber, wherein the extrusion linear speed of the polyacrylonitrile-base polymer from spinnerets is 2 to 15 m/min; and a carbon fiber which is produced by firing the polyacrylonitrile-base precursor fiber obtained by the process and which has a strand tensile modulus of 320 to 380 GPa and a conduction electron density of 3.0 x 10 19 to 7.0 x 10 19 spins/g as determined by electron spin resonance.