Patent ID: 8007882
Filing Date: 2011-08-30
Classification: B32B,B65D,C08L,Y10T

Abstract:
1. A packaging laminate comprising a core layer of paper or carton with at least one through-going hole, opening or slit; an outer layer of thermoplastics applied onto an outer side of the core layer; an aluminum foil applied onto an inner side of the core layer, extending throughout the laminate and extending over the entirety of the at least one through-going hole, opening or slit, and bonded to the core layer by an intermediate bonding layer of thermoplastics, the outer and intermediate bonding layers of thermoplastics both extending throughout the laminate and being in direct contact and sealed to each other within the regions of the at least one through-going hole, opening or slit to form a membrane of aluminum foil and thermoplastics, wherein each of the outer layer and the intermediate bonding layer extends over the entirety of the at least one through-going hole, opening or slit; and at least three layers of thermoplastic materials applied onto an inner side of the aluminum foil, wherein the at least three layers of thermoplastic materials include at least one adhesive layer applied adjacent to the aluminum foil, an intermediate layer comprising a material providing barrier properties towards migration of free fatty acids, and an innermost layer comprising in the majority a metallocene polyethylene, which is an ethylene —α-olefin copolymer, polymerized in the presence of a metallocene catalyst, wherein each of the at least one adhesive layer, the intermediate layer and the innermost layer extends over the entirety of the at least one through-going hole, opening or slit, and wherein each of the at least one adhesive layer, the intermediate layer and the innermost layer extends throughout the entirety of the laminate.