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

H

D21H 11/00 (2006.01) B27N 1/02 (2006.01) B27N 3/08 (2006.01) D21C 9/02 (2006.01) D21D 5/02 (2006.01) D21H 21/36 (2006.01) D21J 1/00 (2006.01)

Patent

CA 2651702

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.

L'invention concerne un panneau de fibres, tel qu'un panneau de fibres MDF ou un panneau de fibres HDF, comprenant des fibres de bois, un liant et une boue telle qu'une boue de pâte et de papier. La boue peut être, par exemple, choisie parmi une boue de pâte et de papier primaire, une boue de pâte et de papier secondaire, une boue de désencrage et des mélanges de celles-ci. On a trouvé qu'en incorporant une telle boue dans des panneaux de fibres et en remplaçant ainsi partiellement les fibres de bois par de la boue, il est possible de produire, à un plus faible coût, un panneau de fibres qui présente des caractéristiques et propriétés similaires à celles d'un panneau de fibres standard. L'invention concerne également des procédés et des compositions utilisés pour préparer de tels panneaux de fibres.

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