Method of producing synthetic fibers from polymers and copolymers of acrylonitrile

Claim 1

THE METHOD OF PRODUCING A SYNTHETIC FIBER FROM A SOLUBLE ACRYLONTRILE POLYMERIZATION PRODUCT CONTAINING IN THE MOLECULES THEREOF AN AVERAGE OF AT LEST ABOUT 85% BY WEIGHT OF COMBINED ACRYLONITRILE, SAID METHOD COMPRISING EXTRUDING THE SAID PRODUCT IN THE FORM OF A FIBER FROM A WATER-COAGULABLE SOLUTION THEREOF; IMMEDIATELY AFTER EXTRUSION CONTACTING THE EXTRUDED MASS WITH A LIQUID COAGULANT COMPRISING WATER, SAID COAGULANT BEING AT A TEMPERATURE NOT EXCEEDING +10*C., THEREBY TO PRECIPTATE THE SAID PRODUCT FROM THE SAID SOLUTION AS A STRETCHABLE, GELLED FIBER; STRETCHING THE SAID GELLED FIBER IN THE PRESENCE OF MOISTURE AND AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 70* C. TO ABOUT 110* C.: APPLYING A LIQUID COMPOSITION CONTAINING AN ANTISTATIC AGENT TO THE STRETCHED GEL; CONTINUOUSLY DRYING THE RESULTING GELLED FIBER WHILE IT IS MOVING UNDER TENSION IN A HELICAL PATH; CONTINUOUSLY PASSING THE DRIED FIBER, WHILE RELAXED AND FREE TO CONTRACT LINEARLY, THROUGH A HEATED ZONE MAINTAINED AT A TEMPERATURE WITHIN THE RANGE OF 100*C. TO 500*C. AT A RATE SUCH THAT THE TIME AT WHICH ANY GIVEN POINT ON THE SAID FIBER IS WITHIN THE SAID ZONE IS FROM 0.01 TO 5 SECONDS, THE TEMPERATURE OF THE SAID ZONE AND THE RATE AT WHICH THE DRIED, RELAXED FIBER IS PASSED THERETHROUGH BEING SUCH THAT NO SUBSTANTIAL DECOMPOSITION OF THE FIBER OCCURS.

Claim 2

THE METHOD OF PRODUCING A SYNTHETIC FIBER FROM A SOLUBLE ACRYLONTRILE POLYMERIZATION PRODUCT CONTAINING IN THE MOLECULES THEREOF AN AVERAGE OF AT LEST ABOUT 85% BY WEIGHT OF COMBINED ACRYLONITRILE, SAID METHOD COMPRISING EXTRUDING THE SAID PRODUCT IN THE FORM OF A FIBER FROM A WATER-COAGULABLE SOLUTION THEREOF; IMMEDIATELY AFTER EXTRUSION CONTACTING THE EXTRUDED MASS WITH A LIQUID COAGULANT COMPRISING WATER, SAID COAGULANT BEING AT A TEMPERATURE NOT EXCEEDING +10*C., THEREBY TO PRECIPTATE THE SAID PRODUCT FROM THE SAID SOLUTION AS A STRETCHABLE, GELLED FIBER; STRETCHING THE SAID GELLED FIBER IN THE PRESENCE OF MOISTURE AND AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 70* C. TO ABOUT 110* C.: APPLYING A LIQUID COMPOSITION CONTAINING AN ANTISTATIC AGENT TO THE STRETCHED GEL; CONTINUOUSLY DRYING THE RESULTING GELLED FIBER WHILE IT IS MOVING UNDER TENSION IN A HELICAL PATH; CONTINUOUSLY PASSING THE DRIED FIBER, WHILE RELAXED AND FREE TO CONTRACT LINEARLY, THROUGH A HEATED ZONE MAINTAINED AT A TEMPERATURE WITHIN THE RANGE OF 100*C. TO 500*C. AT A RATE SUCH THAT THE TIME AT WHICH ANY GIVEN POINT ON THE SAID FIBER IS WITHIN THE SAID ZONE IS FROM 0.01 TO 5 SECONDS, THE TEMPERATURE OF THE SAID ZONE AND THE RATE AT WHICH THE DRIED, RELAXED FIBER IS PASSED THERETHROUGH BEING SUCH THAT NO SUBSTANTIAL DECOMPOSITION OF THE FIBER OCCURS.