METHOD OF MANUFACTURING POLYACRYLONITRILE THREADS AND BRAIDS SUITABLE FOR FABRICATION OF HIGH-STRENGTH CARBON FIBERS

FIELD: synthetic fibers. SUBSTANCE: invention, in particular, relates to production of structurally uniform fibers with microfibrillar structure across entire fiber cross-section, which are further used to manufacture, via known technology, carbon fibers and braids with strength above 5.0 Gpa. Polya...

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Hauptverfasser:	BUDNITSKIJ G.A, SERKOV A.T, MEDVEDEV V.A, RADISHEVSKIJ M.B
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 NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING TEXTILES
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Beschreibung
Zusammenfassung:	FIELD: synthetic fibers. SUBSTANCE: invention, in particular, relates to production of structurally uniform fibers with microfibrillar structure across entire fiber cross-section, which are further used to manufacture, via known technology, carbon fibers and braids with strength above 5.0 Gpa. Polyacrylonitrile fibers are extruded from homogeneous spinning solutions containing 10000-50000 0.1-0.5-mcm disperse particles in 1 qu.cm at concentration of precipitator in coagulation basin 2-12% above its threshold precipitation concentration. Disperse particles are introduced into reaction mixture before polymerization or into spinning solution. Fiber strength is 5.0-5.36 Gpa and elongation 1.6-1.8%. EFFECT: improved consumer quality. 4 cl, 2 tbl, 3 exc