| 摘要 |
<p>Coextruded easy-opening film structures 10 having at least three layers 11, 12, 13 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 11 includes a material selected from the group consisting of ethylene/±-olefin copolymer, propylene/ethylene copolymer and blends thereof, the second film layer 12 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 13 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.</p> |
