Heat sealable monoaxially-oriented propylene-based film with directional tear
AssigneeToray Plastics (America), Inc.
InventorsMark S. LEE, Harold Egon KOEHN, Emilio COLETTA, Matthew H. BROWN
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Abstract
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.
Claims15
A method of making a film comprising:
- extruding a film comprising a heat sealable first layer comprising an ethylene-propylene impact copolymer and 3-15 wt % of a metallocene-catalyzed propylene-butene elastomer;
- and
- monoaxially orienting the film 4 times its original length in the machine direction.
Dependencies are inferred from the claim text.