Fiberboards, uses and methods of preparation thereof

Details Fiberboards, uses and methods of preparation thereof Fiberboards, uses and methods of preparation thereof

D - Textiles, Paper

21

J

D21J 1/00 (2006.01)

Patent

CA 2675683

There is provided a fiberboard, such as a MDF fiberboard or a HDF fiberboard, comprising wood fibers, a binder, and a sludge such as a pulp and a paper sludge. The sludge can be, for example, chosen from a primary pulp and paper sludge, a secondary pulp and paper sludge, a de-inking sludge, and mixtures thereof. It was found that by incorporating such a sludge in fiberboards and thus partially replacing wood fibers by sludge, it is possible to produce a fiberboard, at lower costs, which demonstrated characteristics and properties similar to a standard fiberboard. Processes and compositions used for preparing such fiberboards are also disclosed.

La présente concerne un panneau de fibres, comme un panneau de fibres MDF ou un panneau de fibres HDF, comprenant des fibres de bois, un liant et une boue, p. ex. de la boue de pâte et papier. La boue peut, par exemple, consister en boue de pâte et papier primaires, en boue de pâte et papier secondaires, en boue de désencrage, et leurs mélanges. Il a été constaté que l'intégration d'une telle boue dans les panneaux de fibres remplace en partie les fibres de bois et permet de produire un panneau de fibres à moindre coût, avec des caractéristiques et des propriétés démontrées similaires à celles d'un panneau de fibres standard. Les procédés et les compositions utilisés pour la préparation des panneaux de fibres sont également décrits.

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