Anionically derivatised cotton for improved comfort and...

D - Textiles – Paper – 06 – M

Patent

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Details

D06M 11/66 (2006.01) D06M 11/70 (2006.01) D06M 11/82 (2006.01) D06M 13/184 (2006.01) D06M 13/325 (2006.01) D06M 13/402 (2006.01) D06M 13/432 (2006.01) D06M 13/463 (2006.01) D06M 15/643 (2006.01) D06P 1/673 (2006.01) D06P 5/02 (2006.01) D06P 5/06 (2006.01)

Patent

CA 2344877

The present invention is generally directed to a process for making fabrics containing cotton fibers more aesthetically pleasing and resistant to staining by anionic dyes by derivatising the cotton so that it exhibits a permanent anionic charge. By increasing the anionic charge of the fibers, the fibers become resistant to anionic coloring agents which may undesirably come into contact with the fibers. Furthermore, the negative charges repel each other resulting in a fabric with greater loft and porosity. This results in greater smoothness, better hand, and more comfort. Besides being used to prevent the cross-staining of fabrics, the present invention can also be used to make carpet materials resistant to anionic staining agents. Alternatively, it has also been discovered that an anionic derivative can be used to catalyze permanent press resins onto fabrics containing cellulosic fibers, also resulting in anionic cotton.

L'invention concerne, d'une manière générale, un procédé de fabrication de tissus constitués de fibres de coton présentant une esthétique et une résistance aux taches améliorées. Ce procédé fait appel au teintage anionique par dérivatisation du coton afin qu'il présente une charge anionique permanente. L'augmentation de la charge anionique des fibres permet d'augmenter la résistance des fibres aux colorants anionique susceptibles de venir malencontreusement en contact avec les fibres. En outre, les charges négatives se repoussent mutuellement, ce qui a pour effet de donner plus de volume au tissu, d'en augmenter la porosité et, par conséquent, de lui conférer une plus grande douceur au toucher et un plus grand confort. Outre son utilité pour empêcher le dégorgement mutuel des tissus, la présente invention peut également servir à fabriquer des matières pour tapis résistantes aux agents de dégorgement anioniques. Dans une variante, un dérivé anionique s'est révélé utile pour catalyser des résines infroissables sur des tissus contenant des fibres cellulosiques, ce qui a également pour effet de produire un coton anionique.

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