Patent ID: 7229678

Claim:
A laminated packaging material comprising: a paperboard substrate, having an inner surface and an outer surface; an outer layer of heat-sealable polyolefin polymer coated on said outer surface of said paperboard substrate; a polyamide layer coated on said inner surface of said paperboard substrate; a tie layer coated on the inner surface of said polyamide layer; and a blown-film layer comprising an outer layer of polyolefin polymer, a tie layer, a first layer of ethylene vinyl alcohol copolymer, a second tie layer, a second layer of ethylene vinyl alcohol copolymer, a third tie layer and a second and final layer of polyolefin, said blown-film layer being coated on the inner surface of said tie layer coated on the inner surface of said polyamide layer; and an innermost layer of polyolefin coated on said final layer of polyolefin of said film layer.