Film containing alpha-olefin/vinyl aromatic copolymer

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 23/08 (2006.01) B32B 27/08 (2006.01) B32B 27/32 (2006.01) B65D 65/40 (2006.01) C08J 5/18 (2006.01) C08L 23/14 (2006.01)

Patent

CA 2191090

Film and sheet materials, and articles made therefrom, such as bags pouches, trays etc., comprise one or more layers of homogeneous alpha-olefin vinyl aromatic copolymer, preferably an ethylene/styrene copolymer. The alpha-olefin/vinyl aromatic copolymer has properties which can provide a desired performance characteristics such as impact resistance, printability, RF sealability, free shrink, optics, high permeability, etc. The homogeneous alpha-olefin/vinyl aromatic copolymer may be present in a monolayer film, either alone or in a blend, or may be included in one or more layers of a multilayer film. Also included is a multiplayer thermoformable article comprising a web having a film of such alpha-olefin/vinyl aromatic copolymers thereto.

Matériaux en film et en feuille et articles fabriqués à partir de ceux-ci, tels que des sacs, des sachets, des plateaux, etc., comportant une ou plusieurs couches de copolymère aromatique alpha-oléfine/vinyle, de préférence un copolymère éthylène-styrène. Le copolymère aromatique alpha-oléfine/vinyle possède des propriétés susceptibles de produire les caractéristiques de comportement souhaitées, telles que la résistance aux chocs, l'aptitude à l'impression, l'aptitude au soudage par fréquences radio, la rétraction libre, les qualités optiques, la perméabilité, etc. Le copolymère aromatique alpha-oléfine/vinyle homogène peut être présent dans un film monocouche, soit seul, soit en mélange, ou bien il peut être intégré dans une ou plusieurs couches d'un film multicouches. L'invention concerne également un article thermoformable multicouches comportant un textile sur lequel un film de copolymères aromatiques alpha-oléfine/vinyle de ce type est appliqué.

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