Patent ID: 6857561

Claim:
A composite container, comprising: a container body comprising from one to a plurality of paperboard plies wrapped about an axis and adhered together to form a tubular body wall of the container body, the tubular body wall having an inner surface and an outer surface, and a substantially fluid-impervious liner covering and adhered to the inner surface of the tubular body wall, the liner comprising a non-foil-based polymer liner having a polymer film barrier layer; a rolled bead formed at least at one end of the container body; a flexible membrane closure seated to an end surface of the bead for closing the one end of the container body, a first heat seal material being disposed on the end surface of the bead, a second heat seal material being disposed on the membrane closure and cooperating with the first heat seal material to seal the membrane closure onto the bead; wherein the first heat seal material is joined to the polymer film barrier layer of the liner by a primer layer disposed therebetween, the primer layer providing a relatively high z-direction bond strength between the first heat seal material and the barrier layer while providing a shear strength that is weaker than that between the first and second heat seal materials and weaker than that between the second heat seal material and the membrane closure such that peeling of the membrane closure from the end surface of the bead tends to cause the first heat seal material to remain attached to the membrane closure and to be detached from the barrier layer at the end surface of the bead.