MULTI-LAYER FILM WITH GRAFTED SYDIOTACTIC POLYPROPYLENE ADHESION PROMOTING LAYER

摘要

A multilayer film has a core layer (13), such as a biaxially oriented polypropylene layer, and an adhesion promoting layer (12) formed from a graft copolymer of syndiotactic polypropylene and a monomer, such as maleic anhydride, which has hydrophilic functionality. The adhesion promoting layer may be metallized (11) to provide a barrier to oxygen and water vapor. The adhesion promoting layer (12) may also render the surface of the film more receptive to printing inks, laminating adhesives, primerless overcoats and the like.