Retortable packaging film with having seal/product-contact...

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 27/32 (2006.01) B65D 81/34 (2006.01)

Patent

CA 2600562

A retortable multilayer packaging film comprises a crosslinked first layer which serves as an outer heat seal/ product contact layer, and a crosslinked second layer which serves as an outer heat seal/ skin layer. The crosslinked first outer heat seal/ product contact layer comprises a blend of a homogeneous ethylene/alpha-olefin copolymer and a heterogeneous ethylene/alpha- olefin copolymer and/r a propylene/ethylene copolymer having a melting point of from about 110~C to about 150~C and having up to 4.9 weight percent ethylene mer. The crosslinked outer heat seal/skin layer comprises a blend of: an isotactic propylene-based polymer, and a homogeneous ethylene/C4-8 alpha- olefin copolymer having a density of from about 0.86 g/cc to about 0.91 g/cc. 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.

Film d'emballage multicouche stérilisable en autoclave comprenant une première couche réticulée extérieure jouant le rôle de joint à chaud/contact avec le produit , et une seconde couche réticulée extérieure jouant le rôle de joint à chaud/peau. La première desdites couches comprend un mélange de copolymère homogène d'éthylène/alpha-oléfine et d'un copolymère hétérogène d'éthylène/alpha-oléfine et/ou de copolymère de propylène/éthylène dont le point de fusion est compris entre 110 °C et 150 °C environ et contenant jusqu'à 4,9 % en poids d'éthylène mer. La seconde desdites couches comprend un mélange de polymère isostatique à base de propylène et d'un copolymère homogène d'éthylène/C4-8 alpha-oléfine d'une densité comprise entre 0,86 g/cc et 0,91 g/cc environ. L'invention concerne également des articles d'emballage faits du film en question, de produits emballés au moyen dudit film et d'un procédé d'emballage avec ce film.

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