Wettable polyester fibers and fabrics

D - Textiles – Paper – 01 – F

Patent

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Details

D01F 6/92 (2006.01) A61F 13/15 (2006.01) A61L 15/18 (2006.01) D01F 8/14 (2006.01)

Patent

CA 2573789

The present invention is aimed at a method of providing wettability to polyester fibers or filaments, to woven or nonwoven fabrics made therefrom and to resultant articles of manufacture. The method comprises melt extruding a mixture comprising a polyester and one or more alkyl metal sulfonates where the metal is Na, Li or K and the alkyl is straight or branched chain alkyl of 12 to 15 carbon atoms, or is straight or branched chain alkenyl of 12 to 18 carbon atoms. The alkyl metal sulfonates are present from 2% to 5% by weight based on the weight of the polyester. A post treatment step such as an alkaline treatment step is not included. The melt extrusion mixtures do not include certain additives such as polyoxy- alkylene compounds, alkylmonoethonolamide compounds, alkyldiethanolamine compounds and polyetheramide compounds.

L'invention concerne un procédé permettant de conférer une mouillabilité à des fibres ou filaments polyester, à des tissus tissés ou non tissés conçus à partir de ceux-ci et à des articles fabriqués obtenus. Le procédé consiste à extruder à chaud un mélange comprenant un polyester et un ou plusieurs sulfonates métalliques d'alkyle, le métal étant Na, Li ou K et l'alkyle étant un alkyle à chaîne droite ou ramifiée comprenant entre 12 et 15 atomes de carbone ou un alcényle à chaîne droite ou ramifiée comprenant entre 12 et 18 atomes de carbone. La présence des sulfonates métalliques d'alkyle est comprise entre 2 % et 5 % en poids, en fonction du poids du polyester. Une étape de post-traitement, telle qu'une étape de traitement alcalin, n'est pas inclue. Les mélanges d'extrusion à chaud ne comprennent pas certains additifs, tels que des composés de polyoxy- alkylène, des composés d'alkylmonoéthonolamide, des composés d'akyldiéthanolamine et des composés de polyétheramide.

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