Process for sizing paper

Details Process for sizing paper Process for sizing paper

D - Textiles, Paper

21

H

D21H 21/16 (2006.01) D21H 23/76 (2006.01) D21H 17/29 (2006.01) D21H 17/47 (2006.01)

Patent

CA 2418400

The present invention refers to a process for sizing paper which comprises adding to an aqueous suspension containing cellulosic fibres, and optional fillers, (i) a sizing dispersion comprising a sizing agent and a polymer having one or more aromatic groups, and (ii) a sizing promoter comprising a polymer having one or more aromatic groups, forming and draining the obtained suspension, wherein the sizing dispersion and the sizing promoter are added separately to the aqueous suspension.

La présente invention concerne un procédé de collage de papier consistant : - à ajouter à une suspension aqueuse contenant des fibres cellulosiques, et éventuellement des charges, (i) une dispersion de collage contenant une colle et un polymère ayant au moins un groupe aromatique, et (ii) un promoteur de collage contenant un polymère ayant au moins un groupe aromatique ; - à façonner et à drainer la suspension obtenue, la dispersion de collage et le promoteur de collage étant ajoutés séparément à la suspension aqueuse.

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