Process for the production of paper

Details Process for the production of paper Process for the production of paper

D - Textiles, Paper

21

H

D21H 17/29 (2006.01) C08L 33/26 (2006.01) D21H 17/32 (2006.01) D21H 17/37 (2006.01) D21H 17/45 (2006.01) D21H 17/55 (2006.01) D21H 17/56 (2006.01) D21H 17/68 (2006.01) D21H 23/04 (2006.01) C08L 3/04 (2006.01) C08L 79/02 (2006.01)

Patent

CA 2180404

The invention relates to a process for the production of paper from a suspension of cellulose containing fibers, and optional fillers, wherein a low molecular weight cationic organic polymer, a high molecular weight cationic or ampho- teric polymer and anionic inorganic particles are added to the suspension and the suspension is formed and drained on a wire, wherein the low molecular weight polymer has a molecular weight below 700,000, the high molecular weight polymer has a molecular weight above 1,000,000 and said polymers are simul- taneously added to the suspension. The invention further relates to a polymer mixture in the form of an aqueous dispersion comprising at least one high molecular weight cationic and/or amphoteric acrylamide-based polymer having a molecular weight above 1,000,000, at least one low molecular weight cationic organic polymer having a molecular weight below 700,000 and at least one water-soluble inorganic salt, wherein the weight ratio of said high molecular weight polymer to said low molecular weight polymer is within the range of from 9:1 to 1:2.

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