公开(公告)号：US3840633A

公开(公告)日：1974-10-08

申请号：US14501971

申请日：1971-05-19

申请人： RHODIACETA

发明人： LEQUAY C ,  BARBE G ,  CURTILLAT P

IPC分类号： D01D5/12 ,  D01F6/62 ,  D02J1/22 ,  D01F3/10

CPC分类号： D02J1/228 ,  D01D5/16 ,  D01D10/00 ,  D01F6/60 ,  D01F6/62

摘要： 1. A PROCESS FOR THE PRODUCTION OF ORIENTED CONTINUOUS FILAMENTS OF POLYESTTERS OR POLYAMIDES OF FIBER-FORMING MOLECULAR WEIGHT BY SPINNING THE POLYMER AND ORIENTING THE RESULTING FILAMENT BY STRETCHING IN WHICH THE SPINNING AND STRETCHING ARE CARRIED OUT AS A SINGLE CONTINUOUS PROCESS, WHICH COMPRISES AS A SERIES OF SUCCESSIVE STEPS, ONE FOLLOWING IMMEDIATELY ON ONE ANOTHER IN THE FOLLOWING ORDER: (A) EXTRUDING AS CONTINUOUS FILAMENTS THE MOLTEN POLYMER INTO AN ATMOSPHERE AT SUBSTANTIALLY THE AMBIENT TEMPERATURE; (B) COOLING THE FILAMENTS SO FORMED DIRECTLY TO A TEMPERATURE T1 BETWEEN 55* AND 130*C. WHICH IS (I) ABOVE 55*C., (II) AT LEAST 5*C. ABOVE THE SECOND ORDER TRANSITION TEMPERATURE OF THE POLYMER, AND (III) NOT HIGHER THAN THE MAXIMUM TEMPERATURE AT WHICH STRETCHING FILAMENTS OF THE POLYMER ORIENTS THEM; (C) POSITIVELY FORWARDING THE FILAMENTS WHEN THEY HAVE REACHED THE SAID TEMPERATURE T1 AT A SPEED V1 HIGHER THAN THE EXTTRUSION SPEED, WHEREBY THE FRESHLY EXTRUDED FILAMENTS ARE ATTENUATED WITHOUT BEING SUBSTANTIALLY ORIENTED;

(D) COOLING THE FILAMENTS FURTHER TO A TEMPERATURE T2 BELOW 75*C. WHICH IS ALSO BETWEEN T1 AND THE AMBIENT TEMPERATURE, BY CAUSING THEM TO CONTINUE TO TRAVEL THROUGH AN ATMOSPHERE AT THE AMBIENT TEMPERATURE; AND (E) POSITIVELY FORWARDING THE FILAMENTS WHILE THEY ARE AT THE SAID TEMPERATURE T2 AT A SPEED V2 WHICH IS GREATER THAN V, THE RATIO V2/V1 BEING FROM 3:1 TO 6:1, WHEREBY THE FILAMENTS SO PRODUCED ARE ORIENTED.