Barrier blend and food packaging film containing the blend

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 27/04 (2006.01) B29D 7/01 (2006.01) B32B 27/30 (2006.01) C08J 5/18 (2006.01) C08L 23/26 (2006.01) C08L 27/08 (2006.01) C08L 71/00 (2006.01)

Patent

CA 2163014

A copolymer blend comprising vinylidene chloride-vinyl chloride copolymer, vinylidene chloride-methyl acrylate copolymer or a mixture thereof, from 2 to 20% by weight of CO-modified ethylene vinyl acetate copolymer or CO-modified ethylene alkyl acrylate copolymer and preferably up to 5% of a plasticizer and/or stabiliser relative to the total weight of the blend is useful as a barrier layer in a multi-layer film for packaging food such as cheese. A multi-layer film comprising such a blend, a method of producing such a blend or multi-layer film and a package or bag formed from the film.

Un mélange de copolymères comprenant un copolymère de chlorure de vinyle et de chlorure de vinylidène, un copolymère d'acrylate de méthyle et de chlorure de vinylidène ou un mélange de ceux-ci, contenant de 2 à 20 % en poids d'un copolymère d'acétate de vinyle d'éthylène modifié par CO ou d'un copolymère d'acrylate d'alkyle d'éthylène modifié par CO, et de préférence jusqu'à 5 % d'un plastifiant et/ou d'un stabilisant par rapport au poids total du mélange, est utilisé comme couche d'arrêt dans un film multicouche destiné à l'emballage d'aliments tels que du fromage. Un film multicouche comprenant ce mélange, un procédé de fabrication de ce mélange ou de ce film multicouche, et un emballage ou sac obtenu à partir de ce film sont également décrits.

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