Process for the production of a cellulosic product

Details Process for the production of a cellulosic product Process for the production of a cellulosic product

D - Textiles, Paper

21

H

D21H 21/20 (2006.01)

Patent

CA 2687961

The present invention concerns a process for the production of a cellulosic product comprising providing a fiber-containing suspension, wherein at least about 60% by weight of the fibers are cellulosic fibers,and dewatering the suspension on a wire to form a cellulosic fiber web, the process further comprisingadding silica-based particles to the formed web and a wet strength agent to the suspension and/or to the formed web. The invention also concerns a product obtainable by the process. The invention further concerns a dispersion comprising silica-based particles and a substantially aldehyde-free wet strength agent. A further aspect of the invention concerns a dispersion comprising silica-based particles having a specific surface area rangingfrom about 1000 to about 1700m2 /g and a wet strength agent. Still another aspect of the invention concerns the use of the dispersion as an additive in a papermaking process.

Procédé de production de produit cellulosique, qui consiste à fournir une suspension contenant des fibres dans laquelle au moins environ 60 % des fibres, en poids, sont cellulosiques, et à déshydrater la suspension sur une toile pour former une bande de fibres cellulosiques, puis à ajouter des particules à base de silice à cette bande formée et un agent d'hydrorésistance à la suspension et/ou à la bande formée. On décrit par ailleurs un produit issu de ce processus, et enfin une dispersion qui comprend des particules à base de silice et un agent d'hydrorésistance sensiblement dépourvu d'aldéhyde. Selon un autre aspect, on décrit une dispersion qui comprend des particules à base de silice ayant une surface spécifique comprise enter environ 1 000 et environ 1 700 m2 /g et un agent d'hydrorésistance, et un autre aspect de l'invention concerne l'utilisation de la dispersion comme additif dans un procédé de fabrication de papier.

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