Abstract: A paper-based lidding material includes a paper layer and a layer containing a cyclic olefin copolymer. The material is useful for blister packaging and particularly suitable for push-through pharmaceutical and food blister packaging. In one embodiment, the lidding material is formed by extrusion coating and includes at least one paper layer, at least one primer layer, at least one tie layer, at least one barrier layer containing one or more cyclic olefin copolymers, and at least one sealant layer in that order. In another embodiment, the paper-based lidding material includes a paper layer laminated to one or more barrier layers containing one or more cyclic olefin copolymers adjacent to one or more sealant layers. Embodiments of the invention can be sealed to a variety of blister films, including films that are chloride-free, to provide environmentally benign blister packages having good moisture properties.

Abstract: An extrusion-coated lidding foil for blister packaging particularly suitable for push-through pharmaceutical and food blister packaging. The lidding foil includes a foil layer on which one or more tie layer and one or more sealant layer, one or both of which include an embrittling agent mixed therein, are extrusion coated resulting in a lidding foil having push-through ability. The push-through ability of the lidding foil is characterized by a Mullen burst strength of about 10 psi to about 30 psi and an MD tear strength of about 30 to about 100 grams-force.

Abstract: The present invention provides a paper-based lidding material, which includes a paper layer and a layer containing a cyclic olefin copolymer. The material is useful for blister packaging and particularly suitable for push-through pharmaceutical and food blister packaging. In one embodiment, the lidding material is formed by extrusion coating and includes at least one paper layer, at least one primer layer, at least one tie layer, at least one barrier layer containing one or more cyclic olefin copolymers, and at least one sealant layer in that order. In another embodiment, the paper-based lidding material includes a paper layer laminated to one or more barrier layers containing one or more cyclic olefin copolymers adjacent to one or more sealant layers. Embodiments of the invention can be sealed to a variety of blister films, including films that are chloride-free, to provide environmentally benign blister packages having good moisture properties.