Anionic functional promoter and charge control agent with...

D - Textiles – Paper – 21 – H

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Details

D21H 23/76 (2006.01) D21H 17/29 (2006.01) D21H 17/42 (2006.01) D21H 17/55 (2006.01) D21H 21/20 (2006.01) D21H 21/24 (2006.01) D21H 21/18 (2006.01)

Patent

CA 2514742

The invention relates to a composition comprising (a) a functional promoter comprising a water-soluble anionic polymer having a molecular weight of at least about 50,000 daltons and a molecular weight charge index value of at least about 10,000; (b) a cationic surfactant component; such that when the composition treats a fibrous substrate, in conjunction with a cationic strength agent, the treated fibrous substrate exhibits (i) a ratio of wet tensile strength to dry tensile strength ranging from about 1:5 to about 1:2 and (ii) an increase in a ratio of wet tensile strength to dry tensile strength of at least about 10%, as compared to when the fibrous substrate is treated with the functional promoter and without a surfactant. The invention also relates to a paper product made with such a system, and method for imparting wet strength to a paper product with the functional promoter.

L'invention concerne une composition comprenant (a) un promoteur fonctionnel renfermant un polymère anionique soluble dans l'eau présentant un poids moléculaire d'au moins environ 50000 daltons et une valeur d'indice de charge de poids moléculaire d'au moins environ 10000, et (b) un composant tensioactif cationique. Ainsi, lorsqu'on utilise cette composition pour traiter un substrat fibreux, conjointement avec un agent de résistance cationique, le substrat fibreux traité présente (i) un rapport résistance à l'allongement à sec/résistance à la traction à l'état humide compris entre environ 1:5 et environ 1:2, et (ii) une augmentation du rapport résistance à la traction à l'état humide/résistance à l'allongement à sec d'au moins environ 10 %, en comparaison avec le traitement du substrat fibreux avec le promoteur fonctionnel et sans tensioactif. L'invention concerne également un produit de papier fabriqué au moyen de ce système, ainsi qu'un procédé destiné à conférer une résistance à l'état humide à un produit de papier au moyen dudit promoteur fonctionnel.

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