Easy open tear film

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 27/34 (2006.01) B29C 47/06 (2006.01) B32B 27/08 (2006.01) B65D 65/40 (2006.01) B65D 75/26 (2006.01)

Patent

CA 2278013

A film includes a core layer including a polyamide, two intermediate layers, disposed on opposite surfaces of the core layer, including an adhesive; and two outer layers each disposed on a surface of the respective intermediate layer, comprising an ethylene/alpha olefin copolymer; wherein the two outer layers each constitute at least 27 % of the total thickness of the film. The core layer can include either a single polyamide layer, or three layers wherein two layers of polyamide have therebetween a layer comprising a polymeric adhesive. The film is made preferably by a hot blown process at a blow up ratio of between 2.0:1 and 3.0:1. A process and package are also described.

L'invention porte sur un film comportant une couche centrale de polyamide, deux couches intermédiaires d'adhésif disposées de part et d'autre de la couche centrale, et deux couches extérieures d'un copolymère d'éthylène/alpha oléfine, chacune des couches extérieures disposées à la surface des couches intermédiaires représentant au moins 27 % de l'épaisseur totale du film. La couche centrale peut consister soit en une couche unique de polyamide, soit en deux couches de polyamide séparées par une couche d'un adhésif polymère. Ledit film est de préférence réalisé par soufflage à chaud avec un rapport de soufflage compris entre 2,0:1 et 3,0:1. L'invention porte également sur un procédé et sur un emballage.

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