| 摘要 |
<p>Disclosed is a film (1) for forming vacuum skin packages which comprises a coextruded, multi-layer composite forming web comprising a gas permeable film (2) and a gas impermeable film (3) which can be manually delaminated from each other, the gas permeable film having a plurality of layers including a heat sealable, polymeric layer, and a layer comprising a linear ethylene/alpha-olefin copolymer having a density of less than 0.915 g/cc, the gas impermeable film having a plurality of layers including a barrier layer of a hydrolyzed ethylene/vinyl-acetate or vinylidene chloride copolymer the barrier layer being immediately adjacent to and in contact with the linear ethylene/alpha-olefin copolymer so that when the layers are peeled apart the barrier layer will become a first surface layer and, an outer or second surface layer of polymeric material: the heat sealable layer of the permeable film seals to the surface of the package support member with a bond strength greater than the force required to delaminate the permeable layer from the impermeable layer so that the permeable layer can be peeled from the impermeable layer leaving the package covered with a permeable layer so that oxygen can penetrate to the packaged product.</p> |
