B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/28 (2006.01) B32B 27/08 (2006.01) B65D 65/40 (2006.01)
Patent
CA 2488905
Coextruded easy-opening film structures having at least three layers for use as a packaging film or as a component thereof suitable for storing and/or cooking food items contained therein. The first film layer includes a material selected from the group consisting of ethylene/.alpha.-olefin copolymer, propylene/ethylene copolymer and blends thereof, the second film layer comprises a first modified or unmodified polyolefin and a second modified or unmodified polyolefin which is immiscible in the first modified or unmodified polyolefin; wherein the second layer is disposed between said first layer and said third layer. The third layer includes a material selected from the group consisting of polyethylene, anhydride-modified polyolefin; ethylene/vinyl alcohol copolymer, polyamide and blends thereof. The multilayer coextruded frangible films are thermoformable and exhibit a heat seal strength of between 1000-2500 g/in. (393.7-984.3 g/cm) after being submerged in water at 100° C. for one hour upon conducting a Standard Heat Seal Strength Test.
Kraimer Amy Lynn
Pockat Gregory Robert
Curwood Inc.
Sim & Mcburney
LandOfFree
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