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US 9,951,474 B2Granted
Fiberboards, uses and methods of preparation thereof
AssigneesUniboard Canada Inc., Exp Services Inc.
InventorsYves Charest, André Verville
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Abstract
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.
Claims26
A fiberboard comprising:
- wood fibers;
- a binder present in said fiberboard in an amount of about 18% or less by weight, based on the total dry weight of the fiberboard;
- and
- an untreated sludge chosen from a primary pulp and paper sludge, a secondary pulp and paper sludge, and mixtures thereof,
- wherein said fiberboard is a medium density fiberboard or a high density fiberboard having a density of about 500 to about 1000 kg/m3.
2 more elements
Dependencies are inferred from the claim text.