Improvements to processes for manufacturing paper products...

Details Improvements to processes for manufacturing paper products... Improvements to processes for manufacturing paper products...

D - Textiles, Paper

21

H

D21H 23/10 (2006.01) D21H 17/65 (2006.01)

Patent

CA 2477950

The subject of the present invention is a process for manufacturing paper from cellulose fibres dispersed in an aqueous medium, in which process carbon dioxide is injected into the stock directly or via an aqueous vehicle prior to an addition of chemical additives so as to control the ionic demand and the zeta potential downstream, and especially in the step of adding the additives. In particular, the additives are added to the mixing chest (2) and carbon dioxide is added to the white water on the output side of the brocke pulper (15) or to the short system (9).

L'invention porte sur un procédé de fabrication de papier à partir de fibres de cellulose dispersées dans un milieu aqueux. Au cours de ce procédé, du dioxyde de carbone est injecté dans la pâte, directement ou au moyen d'un excipient aqueux, avant l'addition d'adjuvants chimiques afin de contrôler le besoin en ions et le potentiel zêta en aval, notamment au cours de l'addition d'adjuvants. Plus particulièrement, ces adjuvants sont ajoutés dans une chambre de mélange (2) et du dioxyde de carbone est ajouté dans l'eau blanche sur le côté sortie du désintégrateur de cassés de fabrication (15) ou dans le système court (9).

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