Patent ID: 6057013
Filing Date: 2000-05-02
Classification: A23L,B32B,Y10T

Abstract:
An optically-clear and UV transparent multi-layer film structure useful in the packaging of an oxygen sensitive material, the structure comprising;(a) a first layer comprised of an oxygen scavenging material selected from the group consisting of (I) unsaturated organic oxidizable materials and (ii) polymeric materials having oxidizable sites and transition metal salt catalysts, and which forms at least one organic by-product upon the reaction thereof with oxygen;(b) a second layer separate from the first comprised of an effective amount of by-product complexing material selected from the group consisting of inorganic bases and organic bases, the second layer being located between the first layer and the interior area enclosed by the multi-layer structure, and the by-product complexing material being capable of reacting with and complexing with by-products of the reaction of oxygen with the oxygen scavenging material to prevent the by-products from passing into the interior area;(c) an oxygen barrier layer located outside of the first layer and forming an exterior surface of the multi-layer structure; and(d) a polymeric selective barrier layer which is located between the first layer and the interior area enclosed by the multi-layer structure.