Abstract: A polymeric sheet structure for use in a packaging container. The sheet contains a first layer of oxygen barrier material and a second and optionally third protective layer bonded to the first layer. The oxygen barrier layer material can be saponified ethylene-vinyl acetate copolymer, polyamide, polyvinyl alcohol, modification products thereof, or mixtures thereof, and the second and third protective layer can contain a polymer and an inorganic filler with an aspect ratio distribution in an amount sufficient to further enhance the moisture barrier property of the outer protective layer over what it would be in the absence of the filler. Also a process for protecting an oxygen or moisture sensitive material that includes the step of enclosing the material in a container that is completely or partially constructed of the sheet structure.

Abstract: A polymeric sheet structure for use in a packaging container. The sheet contains a first layer of oxygen barrier material and a second and optionally third protective layer bonded to the first layer. The oxygen barrier layer material can be saponified ethylene-vinyl acetate copolymer, polyamide, polyvinyl alcohol, modification products thereof, or mixtures thereof, and the second and third protective layer can contain a polymer and an inorganic filler with an aspect ratio distribution in an amount sufficient to further enhance the moisture barrier property of the outer protective layer over what it would be in the absence of the filler. Also a process for protecting an oxygen or moisture sensitive material that includes the step of enclosing the material in a container that is completely or partially constructed of the sheet structure.