A flat film barrier laminate material for food packaging includes a core
layer of paper or paperboard having a first side and a second side, a
polymeric coating applied to the first side of the core layer and a food
contacting layer disposed on the second side of the core layer. The food
contacting barrier layer is formed from a plurality of series of layers
of polymeric materials. Each series of layers includes a polyolefin
layer, a tie layer, a polyamide resin layer, a tie layer and a polyolefin
layer. The plurality is a whole number greater than one and the layers
are applied to provide a weight ratio of materials in each series of
15:50 for the polyolefin layers, 5:50 for the tie layers and 10:50 for
the polyamide resin layer.