Patent ID: 7955473

Claim:
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 at least: a first polymer being a water-soluble cationic acrylamide-based polymer having a charge density above 2.5 meq/g and a molecular weight above 2,000,000; a second polymer being a water-soluble acrylamide-based polymer having a molecular weight above 5,000,000; and a third polymer being an inorganic anionic polymer selected from silicic acid or silicate based polymers, with the proviso that the third polymer is not bentonite; wherein the first and second acrylamide-based polymers are formed from a reaction mixture which is free from polyfunctional crosslinking agents; and (iii) dewatering the obtained suspension to form paper.