Method for providing electromagnetic shielding and diffusion...

B - Operations – Transporting – 29 – C

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B29C 47/04 (2006.01) B29C 47/02 (2006.01) B29C 47/06 (2006.01) B32B 15/08 (2006.01) H05K 9/00 (2006.01)

Patent

CA 2197728

A method for fabricating a coextruded part includes a multiple layer sheet. First, an extruded part is fabricated which can include a complex interior structure. Then, a multiple layer sheet material is formed into a tube surrounding the first extruded part and bonded to the outer surface. Next, the composite structure then enters a second extrusion die and an outer layer of a second polymeric material is coextruded over the structure to form the outer surface. Thus, the multiple layer sheet embedded within the coextruded part imparts diffusion barrier and electromagnetic shielding capabilities to a complex extruded part in a continuous and cost effective manner.

Méthode pour fabriquer une pièce par co-extrusion comportant une feuille à couches multiples. Premièrement, une pièce extrudée est fabriquée et peut comprendre une structure interne complexe. Puis, un matériau en feuilles à couches multiples est façonné en un tube qui entoure la première pièce extrudée et est lié à la surface externe. Ensuite, la structure composite entre alors dans une deuxième filière et une couche externe d'un deuxième polymère est co-extrudé sur la structure afin de former la surface externe. La feuille à couches multiples, encastrée dans la pièce co-extrudée, offre donc des capacités de barrière de diffusion et de protection électromagnétique à une pièce extrudée complexe d'une façon continue et rentable.

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