MULTI-LAYERED FILMS ORIENTED IN THE MACHINE DIRECTION AND ARTICLES COMPRISING THE SAME

The present invention provides uniaxially oriented films and packages formed from such films. In one aspect, a uniaxially oriented film comprises (a) a first layer comprising a polyolefm plastomer having a density of 0.865 to 0.908 g/cm3 and a melt index (I2) of 0.5-6 g/10 minutes, and at least one...

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Bibliographische Detailangaben
1. Verfasser: BARRENECHE, Felipe Martinez
Format: Patent
Sprache:eng ; fre ; ger
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Beschreibung
Zusammenfassung:The present invention provides uniaxially oriented films and packages formed from such films. In one aspect, a uniaxially oriented film comprises (a) a first layer comprising a polyolefm plastomer having a density of 0.865 to 0.908 g/cm3 and a melt index (I2) of 0.5-6 g/10 minutes, and at least one of a single-site catalyzed linear low density polyethylene having a density of 0.912 g/cm3 to 0.935 g/cm3 and a melt index (I2) of 0.5 to 6 g/10 minutes, or a Ziegler-Natta catalyzed ultra low density polyethylene having a density of 0.880 g/cm3 to 0.912 g/cm3, a melt index (I2) of 0.5 to 6 g/10 minutes, and a MWD of 6.0 or less; (b) a second layer comprising a Ziegler-Natta catalyzed ultra low density polyethylene having a density of 0.880 g/cm3 to 0.912 g/cm3, a melt index (I2) of 0.5 to 6 g/10 minutes, and a MWD of 6.0 or less; and (c) at least one inner layer between the first layer and the second layer comprising at least one polyolefin. The film is oriented in the machine direction at a draw ratio of between 4:1 and 10:1, and can exhibit a machine direction 2% secant modulus of 85,000 psi or more when measured as per ASTM D882.