Multilayer film, article made therefrom, and packaged...

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 27/00 (2006.01)

Patent

CA 2559180

A multilayer film comprises six layers in the layer arrangement 1/5/4/3/6/2. The first layer (1) serves as a heat sealing layer and comprises a homogeneous ethylene/alpha-olefin copolymer wherein the alpha-olefin has from 3 to 20 carbon atoms. The second layer (2) is a second outer layer and serves as an abuse layer. The third layer (3) is an O2-barrier layer and is between the first layer and the second layer. The fourth layer (4) is an inner layer comprising at least one member selected from the group consisting of polyamide and polyester. The fourth layer is between the fifth layer and the sixth layer. The fifth layer (5) is an inner layer serving as a first tie layer, the fifth layer being between the first layer and the third layer. The sixth layer is an inner layer serving as a second tie layer, the sixth layer being between the second layer and the third layer. The invention also pertains to a packaging article, such as a bag, pouch, casing, etc., which is made from or comprises the multilayer film as well as a packaged product comprising a product (e.g., food) surrounded by a package comprising the multilayer film.

Cette invention se rapporte à un film multicouche, qui comprend six couches selon l'agencement 1/5/4/3/6/2. La première couche (1) sert de couche de thermoscellage et comprend un copolymère d'éthylène/alpha-oléfine homogène dans lequel l'alpha-oléfine contient 3 à 20 atomes de carbone. La seconde couche est une seconde couche externe et sert de couche d'excédent. La troisième couche est une couche barrière anti-O¿2 ?et elle est située entre la première et la seconde couche. La quatrième couche (4) est une couche interne contenant au moins un élément choisi dans le groupe composé de polyamide et de polyester. La quatrième couche est placée entre la cinquième et la sixième couche. La cinquième couche (5) est une couche interne servant de première couche d'attache et elle est placée entre la première et la troisième couche. La sixième couche est une couche interne servant de seconde couche d'attache et elle est placée entre la seconde et la troisième couche. Cette invention concerne également un article d'emballage, tel qu'un sac, une poche ou un coffret, notamment, qui est fabriqué à partir de ce film multicouche ou qui comprend ce film multicouche, ainsi qu'un produit emballé contenant un produit (par exemple alimentaire) entouré par un emballage comprenant ce film multicouche.

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