Multilayer containers and methods of manufacture

B - Operations – Transporting – 32 – B

Patent

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B32B 27/32 (2006.01) B65D 65/40 (2006.01)

Patent

CA 2629741

A blow molded plastic container (10) includes a multilayer sidewall (12) having at least three consecutive layers A, B and C. Layers A and C are of identical plastic composition, and of a composition different from layer B. In exemplary embodiments of the disclosure: (1) layers A and C are of a composition selected from the group consisting of cyclic olefin polymers, cyclic olefin copolymers, acrylonitriles and blends thereof, and the layer B is of a composition selected from the group consisting of cyclic olefin polymers, cyclic olefin copolymers, polycarbonates and blends thereof; (2) layers A and C are of a composition selected from the group consisting of polycarbonates acrylonitriles and blends thereof, while layer B is of a composition selected from the group consisting of nylons, polycarbonate and blends thereof; and (3) layers A and C are of acrylonitrile composition, and layer B is of ethylene vinyl alcohol

La présente invention concerne un récipient en plastique (10) moulé par extrusion-soufflage qui comprend une paroi latérale multicouche (12) composée d'au moins trois couches consécutives A, B et C. Les couches A et C ont une composition plastique identique, différente de la composition de la couche B. Dans des modes de réalisation à titre d'exemple de l'invention : (1) la composition des couches A et C est choisie dans le groupe comprenant des polymères oléfiniques cycliques, des copolymères oléfiniques cycliques, des acrylonitriles et leurs mélanges et la composition de la couche B est choisie dans le groupe comprenant des polymères oléfiniques cycliques, des copolymères oléfiniques cycliques, des polycarbonates et leurs mélanges ; (2) la composition des couches A et C est choisie dans le groupe comprenant des polycarbonates acrylonitriles et leurs mélanges, tandis que la composition de la couche B est choisie dans le groupe comprenant des nylons, un polycarbonate et leurs mélanges ; et (3) les couches A et C sont en acrylonitrile et la couche B est en éthylène alcool vinylique.

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