Extruded wood polymer composite and method of manufacture

Details Extruded wood polymer composite and method of manufacture Extruded wood polymer composite and method of manufacture

B - Operations, Transporting

29

C

B29C 47/78 (2006.01) B27N 3/00 (2006.01) B27N 3/28 (2006.01) B29C 44/04 (2006.01) B29C 47/00 (2006.01) B29C 47/10 (2006.01) B29C 47/36 (2006.01) B29C 47/76 (2006.01) B29C 47/94 (2006.01)

Patent

CA 2374396

An extruded composite artificial lumber product is manufactured from wood fibers, a polyethylene matrix and a foaming agent. A mixture is extruded through a molding die which forms the profile of the desired product. The endothermic foaming agent causes greater expansion in the center of the extruded profile and increased density at the outer edges of the extruded profile.

Cette invention concerne un produit composite en simili-bois réalisé à partir de fibres de bois, d'une matrice en polyéthylène et un agent gonflant. Un mélange soumis à un processus d'extrusion dans un moule qui donne sa forme au produit recherché. L'agent gonflant endothermique provoque une expansion accrue de la partie centrale de la pièce extrudée et une augmentation de la densité au niveaux des bords extérieurs de ladite pièce.

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