D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
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.
Carlen Joakim
Johansson Birgitta
Solhage Fredrik
Akzo Nobel N.v.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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