公开(公告)号：US3616633A

公开(公告)日：1971-11-02

申请号：US3616633D

申请日：1970-06-12

Applicant: RHODIACETA

Inventor： CHEVALIER-SEYVET GENEVIEVE ,  JOLY JEAN

IPC: D01D5/253 ,  D02G3/02

CPC classification number: D01D5/253 ,  Y10T428/2973

Abstract: A NOVEL SYNTHETIC FILAMENT AND ARTICLES PRODUCED THEREFROM WHEREIN SAID FILAMENT HAS A TETRALOBAL CONFIGURATION, THE FILAMENT AND ARTICLE PRODUCED THEREFROM POSSESSING IMPROVED CHARACTERISTICS OF RIGIDITY AND GOOD COVERING POWER. SUCH FILAMENTS ARE CHARACTERIZED IN THAT THE RATIO OF THE RADIUS OF THE INSCRIBED CIRCLE, I.E., THE CIRCLE WHICH PASSES THROUGH THE CONNECTING POINT OF THE LOBES, TO THE RADIUS OF THE CIRCUMSCRIBED CIRCLE, I.E., THE CIRCLE WHICH PASSES BY THE SPEX OF THE LOBES, IS WITHIN THE RANGE OF 0.25 AND 0.42. THE TETRALOBAL CONFIGURTION IS FURTHER CHARACTERIZED IN THAT TWO ADJACENT ANGLES FORMED BY THE AXES OF THE LOBES ARE BETWEEN GREATER THAN 90* TO 120*. THE TETRALOBAL SYNTHETIC FILAMENTS ARE PREPARED BY EXTRUDING A THERMOPLASTIC POLYMER IN A MOLTEN CONDITION THROUGH A SPINNERET, THE APERTURES OF WHICH ARE COMPOSED OF FOUR SLITS OF SUBSTANTIALLY EQUAL LENGTH FORMING A CROSS OF TWO ADJACENT ANGLES OF BETWEEN GREATER THAN 90* TO 120*, THE FILAMENTS BEING THEREAFTER PASSED THROUGH A GASEOUS ATMOPHERE AND THROUGH A COOLING BATH MAINTAINED AT A TEMPERATURE LOWER THAN 100*C.