NON-CIRCULAR POLYESTER FIBERS CONTAINING SILICONE AND/OR COPOLYMERS HAVING IMPROVED CROSS SECTIONAL SHAPE RETENTION AND A PROCESS TO PRODUCE THEM

NON-CIRCULAR POLYESTER FIBERS CONTAINING SILICONE AND/OR COPOLYMERS HAVING IMPROVED CROSS SECTIONAL SHAPE RETENTION AND A PROCESS TO PRODUCE THEM

A melt extrusion composition made by combining about 99.9 to about 98.5 weight percent of at least one polyester and about 0.1 to about 1.5 weight percent additive provides for a polyester or copolyester non-circular cross sectional fiber having at least four percent improved shape retention as comp...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: DALTON, JAMES, SAMUEL, NELSON, PHILLIPS, BOBBY, MAL
Format: Patent
Sprache:eng ; fre
Schlagworte:
APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS
CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS
MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS
NATURAL OR ARTIFICIAL THREADS OR FIBRES
SPINNING
TEXTILES
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Beschreibung
Zusammenfassung:A melt extrusion composition made by combining about 99.9 to about 98.5 weight percent of at least one polyester and about 0.1 to about 1.5 weight percent additive provides for a polyester or copolyester non-circular cross sectional fiber having at least four percent improved shape retention as compared to the same fiber made from a melt extrusion composition without the additive. The additive is present at the air-polymer interfacial surface during melt spinning. A method of making the fiber is also disclosed. Composition extrudée en fusion constituée par la combinaison de 99,9 à 98,5 % en poids d'au moins un polyester et de 0,1 à 1,5 % en poids d'un additif et permettant d'obtenir une fibre en polyester ou en copolyester, dont la section transversale n'est pas circulaire et dont la tenue de forme présente une amélioration de 4 % au moins par rapport à une fibre semblable fabriquée au moyen d'une composition extrudée par fusion sans l'additif. Cet additif est présent au niveau de la surface de contact entre l'air et le polymère pendant le filage par fusion. L'invention concerne également un procédé servant à fabriquer la fibre.