Patent ID: 7854987
Filing Date: 2010-12-21
Classification: B32B,Y10S,Y10T

Abstract:
1. A thermal laminating assembly comprising a printed paper-based substrate including a surface with printing ink disposed image-wise thereon; a protective thermoplastic polymer layer comprising a biaxially oriented polypropylene (BOPP) film comprising a first outer layer comprising a polypropylene, a matte wax based compound or a combination thereof, a second outer layer comprising a mixture of m-linear low density polyethlene (m-LLDPE) and antiblock additives and a core layer between the first and second outer layers, comprising a mixture of polypropylene and one or more functional additives including slip, antistatic and lubricant, the BOPP film being thermally laminated to the surface with a thermal laminating layer disposed between the protective layer and the surface of the printed paper-based substrate, said thermal laminating layer comprising 100% by weight of an ethylene vinyl acetate copolymer (EVA) or a blend of ethylene vinyl acetate copolymer (EVA) with one or both of polyethylene and ethylene acrylic acid, wherein said copolymer comprises from about 10% to about 30% by weight of vinyl acetate units and said copolymer has a melt flow index of 18 to 30.