PROCESS FOR PRODUCING SEA-ISLAND-TYPE COMPOSITE SPUN FIBER

• Main Authors: KAMIYAMA, MIE, YAMAMOTO, TAMIO, YAMAMOTO, NOBUYUKI, GODA, HIRONORI, NUMATA, MIYUKI
• Format: Patent
• Language: English; French; Japanese
• Published: 05.04.2007
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, ORYARNS; FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS,ROPES OR THE LIKE; MECHANICAL FINISHING OF YARNS OR ROPES; NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING; TEXTILES; WARPING OR BEAMING; YARNS; YARNS OR THREADS

A process for producing a sea-island-type composite spun fiber whose island component has a diameter of 1 µm or less, characterized in that an unoriented sea-island-type composite spun fiber having been spun at a spinning speed of 100 to 1000 m/min is drawn at a total draw ratio of 5 to 100 (superdrawn) at temperature higher than the glass transition temperatures of respective polymers constituting the sea component and island component of the sea-island-type composite spun fiber. Cette invention concerne un procédé de production de fibre filée composite de type île et mer dont la composante île possède un diamètre inférieur ou égal à 1 µm, caractérisé en ce qu'une fibre filée composite de type île et mer non orientée ayant fait l'objet d'un filage à une vitesse comprise entre 100 et 1000 m/min est étirée selon un rapport d'étirage total compris entre 5 et 100 (superétirage) à une température supérieure à celles de transition vitreuse des polymères respectifs constituant la composante mer et la composante île de ladite fibre.