Patent ID: 6911244
Filing Date: 2005-06-28
Classification: B32B,Y10S,Y10T

Abstract:
1. A film structure comprising: a barrier layer made from a thermally sensitive material; a first adhesive material wherein the thermally sensitive material is encapsulated by the first adhesive material forming a first extrudate upon coextrusion of the thermally sensitive material and the first adhesive material at a first temperature wherein the first adhesive material forms first and second adhesive layers on opposite sides of the barrier layer; a second adhesive material adhered to the first extrudate on a surface of the first extrudate wherein the second adhesive material forms a third adhesive layer on at least one outside surface of the first adhesive material wherein the second adhesive material is coextruded with the first extrudate at a second temperature to form a second extrudate wherein the second temperature is higher than the first temperature; and at least one substrate laminated to an outside surface of the second extrudate at a temperature higher than the first temperature wherein said substrate comprises oriented polypropylene.