Multi-layer films having improved sealing properties

B - Operations – Transporting – 32 – B

Patent

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B32B 27/06 (2006.01) B32B 27/32 (2006.01)

Patent

CA 2561598

Multi-layer films that are suitable for packaging and having improved sealing properties are disclosed. Some embodiments may also provide a lower minimum sealing temperature. A soft polymer is blended in a core layer and a tie layer comprising the soft polymer and, optionally, another polymer. A sealable layer is provided on the side of the tie layer opposite the core layer. The multi~layer films may be transparent, contain a cavitating agent, or are pigmented to form an opaque film. Also, the multi-layer film may be metallized or coated with, a barrier coating.

L'invention concerne des films multicouches appropriés pour l'emballage et présentant des propriétés de scellage améliorées. Certains modes de réalisation peuvent également présenter une température de scellage minimum inférieure. Un polymère souple est incorporé par mélange dans une couche centrale et une couche de liaison comprenant le polymère souple et, éventuellement, un autre polymère. Une couche scellable est formée sur la face de la couche de liaison, opposée à la couche centrale. Ces films multicouches peuvent être transparents, peuvent contenir un agent de cavitation ou sont pigmentés pour former un film opaque. De plus, le film multicouche peut être métallisé ou enduit d'un revêtement protecteur.

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