A metallized film and a process for making the film are disclosed. In
general, the metallized film includes a polymeric film layer that is
coated with a polyester coating composition. A metal layer is then formed
on top of the polyester coating. The polyester coating acts as a tie
layer between the metal layer and the underlying film. The polyester film
composition may be formed from, in one embodiment, isophthalic acid, a
sulfomonomer, and 2-methyl 1,3-propane diol. The above diol has been
found to improve adhesion between the metal layer and the polymeric film
layer.