Stabilized filler, its production and use

Details Stabilized filler, its production and use Stabilized filler, its production and use

D - Textiles, Paper

21

H

D21H 17/67 (2006.01) C09C 1/02 (2006.01) C09C 3/06 (2006.01) D21H 17/64 (2006.01) D21H 23/10 (2006.01) D21H 23/76 (2006.01)

Patent

CA 2362811

The invention relates to a stabilized calcium carbonate filler, a process for stabilizing calcium carbonate, its use in a paper making system and to an improved paper making process wherein stabilized calcium carbonate is used as a filler. Specifically the invention relates to a process wherein the dissolution of calcium carbonate in an aqueous slurry is retarded compared to conventional paper making processes by introducing carbon dioxide into the slurry to lower the pH of the slurry below 8Ø

L'invention concerne une charge au carbonate de calcium stabilisé, un procédé de stabilisation du carbonate de calcium, son utilisation dans un système de fabrication du papier et un procédé de fabrication du papier amélioré, dans lequel le carbonate de calcium stabilisé est utilisé comme charge. L'invention porte notamment sur un procédé dans lequel la dissolution du carbonate de calcium dans une suspension aqueuse est retardé par rapport aux procédés de fabrication du papier classiques, par l'introduction de dioxyde de carbone, de sorte que le pH de la suspension descende au-dessous de 8,0.

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