Push through blister package with plastic lidding

Abstract

Provided is a single material plastic push-through blister pack for food and pharmaceutical packaging and a method of making thereof. The blister package may be produced by thermoforming polymer films for the cavity and a cavitated polymer film made from the same class of polymer comparatively lower thickness for the substrate or lid. To facilitate the push through breaking, the polymer film used as the lidding film may be modified to a microcavitated film by creating micro-voids/cavities and micro-brittleness within the polymer matrix. These micro-voids/cavities, and/or embedded microcrystalline particles present in the polymer matrix of the lidding film, may create internal cracks in the film by application of a small external force, which may then result in rupturing of the lid film to dispense a product from the cavity of the blister pack.

Dependencies are inferred from the claim text.