Process for increasing stain-resistance of cationic-dyeable...

Details Process for increasing stain-resistance of cationic-dyeable... Process for increasing stain-resistance of cationic-dyeable...

D - Textiles, Paper

06

P

D06P 3/24 (2006.01) D01F 6/80 (2006.01) D06P 1/653 (2006.01) D06P 1/673 (2006.01) D06P 5/22 (2006.01)

Patent

CA 2255647

This invention relates to an improved process for dyeing cationic-dyeable polyamide fibers, especially carpet fibers, with an acid dye to provide stain-resistant fibers. The polyamide fibers contain cationically dyeable sulfonate groups along the polymer chain. The improvement involves adding certain water-soluble salts to a dyebath at a concentration of at least 20 % based on the weight of fiber.

L'invention concerne un procédé amélioré pour teindre des fibres de polyamide cationiquement modifiées, en particulier les fibres de tapis, avec une teinture acide afin de les rendre résistantes aux taches. Les fibres de polyamide contiennent des groupements sulfonates le long de la chaîne du polymère qui sont cationiquement modifiés. L'amélioration consiste en l'ajout de certains sels hydrosolubles dans un bain de teinture à une concentration d'au moins 20 % en poids de la fibre.

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