Deodorized multilayer film with vinylidene chloride copolymer barrier
AssigneeViskase Corporation
InventorsJeffrey M. Shuetz, Stephen J. Vicik
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Abstract
In a multilayer thermoplastic film having a vinylidene chloride copolymer barrier and at least a polyolefin second layer laminated to the barrier layer wherein at least the barrier layer is irradiated, hydrotalcite is blended with the polyolefin and substantially reduces odor generation due to ionizing irradiation of the barrier layer.
Claims18
In a irradiated, deodorized multilayer thermoplastic film having a vinylidene chloride copolymer barrier layer and at least a polyolefin second layer laminated to the barrier layer wherein at least the barrier layer is irradiated, the improvement comprising hydrotalcite blended with said polyolefin in quantity of at least about 0.1 wt. % hydrotalcite.
A deodorized biaxially oriented and heat shrinkable irradiated multilayer film comprising a vinylidene chloride copolymer barrier layer which does not contain hydrotalcite, a polyolefin second layer laminated to said barrier layer on one side thereof comprising ethylene vinyl acetate and hydrotalcite blended therewith in quantity of at least about 0.1 wt. % hydrotalcite, and a polyolefin third layer laminated to said barrier layer on the opposite from said polyolefin second layer, said film being prepared by coextrusion and after biaxial orientation being irradiated.
Dependencies are inferred from the claim text.