TREATING METHOD OF FLAMEPROOFED FIBROUS BUNDLE WITH HOT WATER

PURPOSE:To obtain the titled fibrous bundle suitable for preparing carbon fibers of high strength with pevented mutual adhesion of fibers to one another, by treating a flameproofed fibrous bundle consisting of acrylic fibers with the ultrasonic wave vibration in hot bath at a specific temperature or...

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Bibliographische Detailangaben
Hauptverfasser:	SAJI YASUO, YAMAUCHI KEIJI
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 FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR LAUNDERING NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING TEXTILES TREATMENT OF TEXTILES OR THE LIKE TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain the titled fibrous bundle suitable for preparing carbon fibers of high strength with pevented mutual adhesion of fibers to one another, by treating a flameproofed fibrous bundle consisting of acrylic fibers with the ultrasonic wave vibration in hot bath at a specific temperature or above under tension. CONSTITUTION:Acrylic fibers, containing acrylonitrile homopolymer or a copolymer containing 80% or more acrylonitrile are oxidized in an oxidizing atmosphere at 200-300 deg.C, to give a flameproofed fibrous bundle 2, which is then passed through a hot water bath 1 with the ultrasonic wave vibration, preferably 10-100kHz, at 70 deg.C or above under tension and showered by shower nozzles (heads) 4 to give the aimed fibrous bundle 2. The resultant fibrous bundle 2 is then dried to a bone-dry state in a dryer 6, introduced into a carbonizing furnace and carbonized.