A process for the production of paper

Details A process for the production of paper A process for the production of paper

D - Textiles, Paper

21

H

D21H 23/08 (2006.01) D21H 17/20 (2006.01) D21H 21/10 (2006.01) D21H 11/14 (2006.01) D21H 17/01 (2006.01) D21H 17/24 (2006.01) D21H 17/28 (2006.01) D21H 17/32 (2006.01) D21H 17/37 (2006.01) D21H 17/45 (2006.01) D21H 17/68 (2006.01) D21H 23/10 (2006.01)

Patent

CA 2329028

The invention relates to a process for the production of paper from a suspension containing cellulosic fibres, and optional fillers, which comprises adding to the suspension a drainage and retention aid comprising a cationic organic polymer, forming and dewatering the suspension on a wire, wherein the cationic organic polymer has an aromatic group and the suspension which is dewatered on the wire has a conductivity of at least 2.0 mS/cm. The invention further relates to a process for the production of paper from a suspension containing cellulosic fibres, and optional fillers, comprising adding to the suspension a drainage and retention aid comprising a cationic organic polymer having an aromatic group, forming and dewatering the suspension on a wire to obtain a wet web of paper and white water, recirculating the white water and optionally introducing fresh water to form a suspension containing cellulosic fibres, and optional fillers, to be dewatered, wherein the amount of fresh water introduced is less than 30 tons per ton of dry paper produced.

L'invention concerne un procédé de production de papier à partir d'une suspension contenant des fibres cellulosiques et éventuellement des charges. Ce procédé consiste à ajouter à la suspension un auxiliaire de drainage et de rétention contenant un polymère organique cationique, à former et à déshydrater la suspension sur un fil. Le polymère organique cationique a un groupe aromatique et la suspension qui est déshydratée sur le fil, a une conductivité d'au moins 2.0 mS/cm. L'invention concerne également un procédé de production de papier à partir d'une suspension contenant des fibres cellulosiques et éventuellement des charges. Ce procédé consiste à ajouter à la suspension un auxiliaire de drainage et de rétention contenant un polymère organique cationique ayant un groupe aromatique, à former et à déshydrater la suspension sur un fil pour obtenir une bande continue de papier; à faire recirculer l'eau blanche et éventuellement à introduire de l'eau fraîche pour former une suspension à déshydrater, contenant des fibres cellulosiques et éventuellement des charges, la quantité d'eau fraîche introduit étant inférieure à 30 tonnes par tonne de papier sec produite.

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