Improved papermaking processes

Details Improved papermaking processes Improved papermaking processes

D - Textiles, Paper

21

H

D21H 17/67 (2006.01) D21C 9/00 (2006.01) D21H 17/65 (2006.01) D21H 23/76 (2006.01)

Patent

CA 2318072

The invention relates to papermaking processes wherein calcium carbonate is included in a pulp suspension. The dissolution of the calcium carbonate in the papermaking system is substantially retarded by the introduction of carbon dioxide to said pulp suspension. The invention also provides processes for the production of paper or board in papermaking systems wherein solid calcium carbonate is present as a filler and/or pigment.

L'invention concerne un procédé de fabrication de papier dans lequel on incorpore du carbonate de calcium dans une suspension de pâte. On retarde sensiblement la dissolution du carbonate de calcium dans le système de fabrication de papier, par introduction de dioxyde de carbone dans ladite suspension de pâte. L'invention concerne également des procédés de production de papier ou de carton dans des systèmes de fabrication de papier où l'on utilise du carbonate de calcium solide en tant que matière de charge et/ou pigment.

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