Liner element for closure cap

Abstract

An improved liner element for a closure cap which is adapted to be disposed within the closure cap and bonded to the interior end surface thereof. The liner element is characterized by having a laminated structure comprising a backing layer or cushion layer of surface-sorbent material, such as fabric, a relatively thin sheet of paper or comparable surface-sorbent cellulosic or paper-like membrane or substrate, having an inner face which is surface-bonded to the interior end surface of the closure and having an outer face which is surface-bonded to a barrier layer of pliant polymeric material. The barrier layer of polymeric material is selected to possess the properties of being essentially impermeable to water vapor and gaseous transmission so as to be suitable for closure caps utilized in conjunction with containers for packaging comestible products and carbonated or non-carbonated, alcoholic and non-alcoholic beverages. Additionally, the barrier layer is selected to be inert with respect to the container's contents to avoid impairment or alteration of the color, flavor or quality characteristics of the contents of the container. In a preferential alternative aspect, the selected barrier layer is also an essentially transparent polymeric material and the outer surface of the backing layer is receptive to the application of marking materials, such as inks or the like so as to accommodate distinctively applied markings which are visibly discernible through the barrier layer.

Dependencies are inferred from the claim text.