Oxygen scavenging system including a by-product neutralizing...

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 27/18 (2006.01) A23L 3/34 (2006.01) A23L 3/3436 (2006.01) B65D 81/26 (2006.01)

Patent

CA 2247985

Provided is a system useful for oxygen scavenging which comprises at least two components, i.e., an oxygen scavenging material which forms at least one by-product upon reaction thereof with oxygen, and an effective amount of a neutralizing material capable of neutralizing at least a portion of theses by-products. In a preferred application, a multi-layer structure that can be employed in producing packages and in particular food packages, comprises a first layer including an oxygen scavenging material and a second layer which includes a material that is capable of neutralizing at least a portion of the by- products produced by the oxidation of the oxygen scavenging material within the first layer. These two layers are arranged such that, upon formation of the package, the second layer is interior to the first layer. Furthermore, the multi-layer film can include one or more of an oxygen barrier layer, a polymeric selective barrier layer, and a heat-sealable layer.

L'invention porte sur un système désoxygénant comprenant au moins deux composants, c'est-à-dire une matière désoxygénante qui forme au moins un sous-produit en réagissant avec l'oxygène, et une quantité efficace d'une matière neutralisante capable de neutraliser au moins une partie de ces sous produits. Dans une application préférée, une structure multicouches pouvant servir à produire des emballages et en particulier des emballages alimentaires comprend une première couche comportant une matièpre désoxygénante et une seconde couche comportant une matière capable de neutraliser au moins une partie des sous-produits résultant de l'oxydation de la matière désoxygénante contenue dans la première couche. Ces deux couches sont disposées de manière que lors de la formation de l'emballage, la deuxième couche soit intérieure à la première. Le film multicouche peut de plus comporter une ou plusieurs couches formant barrière à l'oxygène, une couche barrière sélective polymère et une couche de thermoscellement.

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