Patent ID: 7384674
Filing Date: 2008-06-10
Classification: B32B,Y10T

Abstract:
1. A packaging laminate for a retortable packaging container, the packaging laminate comprising: a core layer having a first surface and a second surface; a first outer liquid-tight coating on the first surface, the first outer liquid-tight coating being of polypropylene, polyester, high density polyethylene, linear low density polyethylene, mixtures thereof, or a mixture of polypropylene and polyethylene; a second outer liquid-tight coating over the second surface, the second outer liquid-tight coating being of polypropylene, polyester, high density polyethylene, linear low density polyethylene, or copolymers of the monomers thereof; an aluminum foil serving as gas barrier and disposed between the second surface of the core layer and the second outer liquid-tight coating; at least one additional layer serving as gas barrier between the second surface of the core layer and the aluminum foil, wherein the at least one additional layer consists of a material selected from the group consisting of cyclic olefin copolymers (COC), ethylene vinyl alcohol copolymers (EVOH) and polyvinyl alcohol (PVOH); and at least one interjacent adhesive layer of polypropylene bonding the second surface of the core layer to the at least one additional layer.