Patent ID: 7611251

Claim:
A flexible retroreflective article comprising a polymeric light transmissive body layer having an elastic modulus of less than 7×10 8 pascals; a plurality of cube-corner elements projecting from a major surface of the body layer; and a multilayered seal film having a first film layer and a second film layer, the second film layer adhered to at least portions of the body layer such that the seal film maintains an air interface with the cube-corner elements; the second film layer comprising a thermoplastic polymeric material comprising reaction products of alkylene in an amount of at least about 50% by weight and reaction products of at least one non-acidic polar monomer wherein the thermoplastic material has a different melt flow index than the seal film layer in contact with the body layer; wherein the seal film layer in contact with the body layer is a thermoplastic polymeric material comprising reaction products of alkylene in an amount of at least about 50% by weight and reaction products of at least one non-acidic polar monomer and the thermoplastic polymeric material comprises acid modification, anhydride modification, carbon monoxide modification, or a combination thereof.