Temporary wet strength system for tissue paper

Details Temporary wet strength system for tissue paper Temporary wet strength system for tissue paper

D - Textiles, Paper

21

H

D21H 21/20 (2006.01) D21H 21/16 (2006.01) D21H 23/12 (2006.01)

Patent

CA 2583875

The invention relates to a composition comprising a (a) a temporary wet strength agent component capable of forming hemi-acetal bonds with the fibers of a tissue web to provide initial wet strength, subsequent rapid degradation of the initial wet strength when the tissue web contacts water; and (b) a sizing agent component capable of imparting water-repelling properties to the tissue web; such that the strength agent component and the sizing agent component are present in sufficient amounts so that when the composition is added to a tissue pulp slurry during a tissue-making process, tissue made from the tissue-making process exhibits a combination of (1) improved initial wet tensile, (ii) improved decay, and (iii) absorbency.

L'invention concerne une composition comprenant (a) un agent de résistance à l'état humide temporaire capable de former des liaisons hémi-acétal avec les fibres d'une bande de papier tissu, afin de lui conférer une résistance initiale à l'état humide, et une dégradation subséquente rapide de la résistance initiale à l'état humide lorsque la bande de papier entre en contact avec l'eau, et (b) un composant de collage capable de conférer des propriétés hydrofuges à la bande de papier, en doses calculées de telle manière que lorsque la composition est ajoutée à une pâte cellulosique au cours du processus de fabrication du papier tissu, le papier tissu résultant présente une combinaison de (1) une résistance améliorée à la traction à l'état humide, ainsi que (ii) une désintégration, et (iii) une capacité d'absorption améliorées.

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