Abuse-resistant retortable packaging film having oxygen...

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 27/08 (2006.01) B32B 27/34 (2006.01) B65D 81/34 (2006.01)

Patent

CA 2600522

A retortable multilayer packaging film has a crosslinked first outer layer which serves as a seal layer and product-contact layer, and a crosslinked O2- barrier layer. The O2-barrier layer comprises a blend of (i) from 50 to 95 weight percent, based on blend weight, of an amorphous polyamide with a glass transition temperature of from about 80~C to about 200~C, and (ii) a semi- crystalline polyamide. The semi-crystalline polyamide comprises at least one member selected from the group consisting of: (a) from 5 to 50 percent, based on blend weight, of PA-MXD,6/MXD,I; and (b) from 5 to 15 percent, based on blend weight, of a nucleated or non-nucleated polyamide having a viscosity number of 150 millimeters per gram to 185 millimeters per gram as measured in accordance with ISO Test Method 307. The invention also pertains to packaging articles made from the film, packaged products utilizing the film in the package, and a packaging process utilizing the film.

L'invention concerne un film d'emballage multicouche stérilisable comprenant une première couche extérieure réticulée servant de couche d'étanchéité et de couche de contact avec le produit, ainsi qu'une couche barrière à l'O2 réticulée. La couche barrière à l'O2 comprend un mélange renfermant (i) entre 50 et 95 % en poids, sur la base du poids du mélange, d'un polyamide amorphe présentant une température de transition vitreuse comprise entre environ 80 °C et environ 200 °C, et (ii) un polyamide semi-cristallin. Le polyamide semi-cristallin comprend au moins un élément choisi dans le groupe constitué par (a) entre 5 et 50 %, sur la base du poids du mélange, de PA-MXD,6/MXD,I, et (b) entre 5 et 15 %, sur la base du poids du mélange, d'un polyamide nucléé ou non nucléé présentant un indice de viscosité compris entre 150 millimètres par gramme et 185 millimètres par gramme, valeur mesurée selon la méthode d'essai ISO 307. L'invention concerne également l'emballage d'articles constitués de ce film, des produits emballés faisant appel à ce film dans l'emballage, ainsi qu'un procédé d'emballage faisant appel à ce film.

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