A process for the production of paper

D - Textiles – Paper – 21 – H

Patent

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D21H 23/18 (2006.01)

Patent

CA 2592314

The present invention relates to a process for producing paper which comprises: (i) providing an aqueous suspension comprising cellulosic fibres, (ii) adding to the suspension after all points of high shear: a first polymer being a cationic polymer having a charge density above 2.5 meq/g; a second polymer; and a third polymer being an organic or inorganic anionic polymer; and (iii) dewatering the obtained suspension to form paper.

La présente invention concerne un procédé de fabrication de papier qui comprend : (i) l~utilisation d~une suspension aqueuse comprenant des fibres cellulosiques, (ii) l'ajout à la suspension, après tous les points de cisaillement élevé, d~un premier polymère (un polymère cationique ayant une densité de charge supérieure à 2,5 meq/g), d~un deuxième polymère et d~un troisième polymère (un polymère anionique organique ou inorganique), et (iii) l'épaississement de la suspension obtenue pour former du papier.

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