Composites useful as fence and decking components and...

B - Operations – Transporting – 29 – D

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B29D 23/00 (2006.01) B29C 47/00 (2006.01) B29C 47/06 (2006.01) B29C 47/20 (2006.01) B29C 47/56 (2006.01) B29C 47/58 (2006.01) B29D 22/00 (2006.01) B32B 1/08 (2006.01) B32B 27/08 (2006.01) E04H 17/14 (2006.01) E04F 11/18 (2006.01)

Patent

CA 2473737

Composite fence and decking components (10), for example, rails, posts and planks, are provided which generally include a weatherable outer layer (12), a core layer (14) made of a thermal plastic polymeric composition and a wood component in an amount effective as a filler, and an inner layer (16) made of a thermal plastic material. The layers are configured so as to form a generally central hollow space (20). The components are light weight and inexpensive to manufacture. The components can be manufactured by using a single coextrusion process to produce a cylindrical form. The cylindrical form is passed through a reshaping die to (62) form a composite having a desired cross sectional form (64), for example, a composite with a substantially square or rectangular cross section.

La présente invention concerne des composants composites de clôture et de plancher (10), par exemple des rails, des poteaux et des longrines, qui comprennent généralement une couche externe résistante aux intempéries (12), une couche centrale (14) constituée d'une composition polymère thermoplastique et d'un composant en bois, dans une quantité telle qu'il sert de charge, ainsi qu'une couche interne (16) constituée d'un matériau thermoplastique. Lesdites couches sont configurées de façon à former un espace creux (20) qui est généralement central. Les composants sont légers et de production bon marché. Ils peuvent être fabriqués au moyen d'un procédé de coextrusion unique, afin de produire une forme cylindrique. Cette forme cylindrique est passée à travers une filière de reprofilage (62) afin d'obtenir un composite présentant une forme de section transversale souhaitée (64), par exemple un composite présentant une section transversale sensiblement carrée ou rectangulaire.

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