Heat sealable monoaxially-oriented propylene-based film with...

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 23/16 (2006.01) B29D 7/01 (2006.01) B32B 27/08 (2006.01) B32B 27/32 (2006.01) C08J 5/18 (2006.01) C08L 23/20 (2006.01)

Patent

CA 2733574

A monoaxially oriented film including heat sealable layer including an ethylene-propylene impact copolymer and a metallocene-catalyzed propylene-butene elastomer. The heat sealable layer may include a metallocene-catalyzed ethylene- butene elastomer. The film is oriented at least 4 times in the machine direction and exhibits excellent linear directional tear properties in the machine direction and excellent heat seal performance. This film formulation and orientation is suitable for pouch applications requiring an "easy-tear" linear tear feature and excellent hermetic seal properties, particularly for retort pouches.

L'invention concerne un film orienté monoaxialement comprenant une couche thermoscellable comprenant un copolymère résistant aux chocs d'éthylène-propylène et un élastomère de propylène-butène catalysé par le métallocène. La couche thermoscellable peut comprendre un élastomère d'éthylène-butène catalysé par le métallocène. Le film est orienté au moins 4 fois dans la direction de la machine, et présente d'excellentes propriétés de déchirure directionnelle linaire dans la direction de la machine, et une excellente performance de thermoscellage. Cette formulation et cette orientation du film sont adaptées pour des applications de sachet nécessitant une caractéristique de déchirure linaire « à déchirement facile », et d'excellentes propriétés de thermoscellage, en particulier des sachets autoclavables.

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