HEAT SEALABLE MONOAXIALLY ORIENTED PROPYLENE-BASED FILM WITH DIRECTIONAL TEAR
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United States of America Patent
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Issued Date -
Oct 4, 2012
app pub date -
May 30, 2012
filing date -
Aug 15, 2008
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Abstract
A monoaxially oriented film including an ethylene-propylene impact copolymer and 3-15 wt % of a metallocene-catalyzed propylene-butene elastomer and 30-60 wt % of a crystalline propylene homopolymer which is oriented at least 3 times in the machine direction and exhibits excellent linear directional tear properties in the machine direction for retort pouch applications and has excellent heat seal performance both pre- and post-retorting. 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.
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