A laminated film which comprises a film substrate, an adhesive undercoat of a carboxylated ethylene copolymer composition prepared by copolymerizing a monomer mixture of an .alpha.,.beta.-unsaturated carboxylic acid or anhydride and at least one vinylidene monomer of the formula CH.sub.2 =CXY where X and Y are the same or different and each represents hydrogen, chlorine, a lower alkyl containing 1-6 carbon atoms, acetoxy, or a carboxylic ester group in the presence of an ethylene-vinylacetate co...