Film for production of composite material artefacts,...

B - Operations – Transporting – 29 – C

Patent

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B29C 70/32 (2006.01) B32B 33/00 (2006.01)

Patent

CA 2756308

A resin constraint film (1) to be used in production of composite material artefacts (2); the constraint film (1) being formed by a supporting film (6) made of biaxially oriented polypropylene, by an intermediate layer (7) of release chemical product that coats the front face (6a) of the supporting film (6) intended to come into contact with the semi-finished product (2') which will give rise to the composite material artefact (2), and by a surface layer (8) of metal coating material applied onto the intermediate layer (7) via vacuum vaporisation deposition.

L'invention porte sur un film sous contrainte en résine (1) destiné à être utilisé dans la production d'articles en matériau composite (2) ; le film sous contrainte (1) étant constitué par un film de support (6) réalisé en polypropylène orienté de façon biaxiale, par une couche intermédiaire (7) de produit chimique anti-adhérent revêtant la face antérieure (6a) du film de support (6) et conçue pour venir en contact avec le produit semi-fini (2') ce qui produira l'article en matériau composite (2), et par une couche de surface (8) de matériau de revêtement métallique appliquée sur la couche intermédiaire (7) par déposition par vaporisation sous vide.

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