Processing lignocellulosic agricultural residue

Details Processing lignocellulosic agricultural residue Processing lignocellulosic agricultural residue

D - Textiles, Paper

21

J

D21J 1/04 (2006.01) B27N 3/00 (2006.01) D21B 1/00 (2006.01) D21B 1/36 (2006.01) D21F 9/00 (2006.01) D21J 3/00 (2006.01) D21J 5/00 (2006.01)

Patent

CA 2177984

A process for forming molded articles from partially delignified non- woody lignocellulosic materials (10) is disclosed that includes forming a mass of fibrous pulp partially delignified lignocellulosic material from a water suspension thereof, and separating (19) the mass into pieces of a size suitable to an airborne tumbling and drying operation. The pulp is subjected to the tumbling and drying operation (32) such that the fibers are sufficiently separated and aligned to be formed into an interconnected mat or web (46). The mat or web is subjected to sufficient pressure (48) to enable shapes to be molded from a continuous web and articles are molded from the web using a molded press. A water resistant coating (50) may be applied to the mat. A process of delignifying non-wood lignocellulosic material is also disclosed.

Procédé de fabrication d'articles moulés à partir de matériaux (10) lignocellulosiques (non à base de bois) partiellement délignifiés consistant à former une masse de pâte fibreuse desdits matériau à partir de leur suspension aqueuse et à en séparer (19) la masse en morceaux d'une taille adaptée à des opérations de tonnelage et de séchage à l'air. Lors de ces opérations (32), les fibres sont suffisamment séparées et alignées pour former une natte ou nappe (46) maillée qui est ensuite soumise à des pressions (48) suffisantes pour permettre le moulage à la presse en continu de formes à partir des nappes. La natte peut recevoir un revêtement (50) résistant à l'eau. L'invention porte également sur un procédé de délignification de matériaux lignocellulosiques (non à base de bois) partiellement délignifiés.

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