Film packaging

Details Film packaging Film packaging

C - Chemistry, Metallurgy

08

J

C08J 7/06 (2006.01)

Patent

CA 2307576

The invention relates to a packaging material in the form of a film which is transparent to UV light and which blocks the passage of water vapour and gases. The inventive packaging film has a support film consisting of (a) polyolefin or (b) an oriented polpropylene film (OPP) with a 0.5 to 2 µm deep cover layer consisting of a polymer of ethyl vinyl alcohol (EVOH) or of a copolymer of ethylene and ethyl vinyl alcohol or (c) polyamide with a ceramic coating consisting of SiOx, x being a number from 1.5 to 1.8 and the depth of the ceramic layer being 10 nm to 2 µm. The packaging material is suitable for packaging standard foodstuffs and luxury foods which are sterilised by UV radiation after packaging.

L'invention concerne un matériau d'emballage transparent aux rayons ultraviolets, se présentant sous forme de film et à effet barrière vis-à-vis de la vapeur d'eau et des gaz. Ce matériau comprend une feuille-support constituée (a) de polyoléfine ou (b) d'une feuille de polypropylène orienté (oPP), une feuille de recouvrement constituée d'un polymère et d'alcool éthylvinylique ou (c) d'un polyamide, d'une épaisseur comprise entre 0,5 et 2 µm, ainsi qu'un revêtement céramique en SiO¿x?, x valant un nombre compris entre 1,5 et 1,8, d'une épaisseur comprise entre 10 nm et 2 µm. Ce matériau d'emballage convient à l'emballage de produits alimentaires et de denrées de luxe qui, à l'état emballé, sont stérilisés par les rayons ultraviolets de lumière.

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