Patent ID: 8404072

Claim:
A process for preparing a multi-layer, metallized polymeric film, which process comprises: a) providing a film comprising at least one outermost polymeric skin layer comprising a propylene-butylene random copolymer having a butylene content of from about 4.0 wt % to about 12.0 wt %; b) subjecting said outermost surface of said at least one outermost polymeric skin layer to plasma treatment under plasma treatment conditions which provide a labile oxygen ratio on said treated surface of no more than about 20%, wherein said plasma treatment is carried out by treating said polymeric skin layer using a plasma treater within which electrical energy is imparted to a selected gas, wherein said selected gas comprises at least 90 wt % nitrogen and an energy input that ranges from about 50 to about 400 joules per square meter, and using a gas flow rate of from about 0.025 to about 0.125 normal-meters cubed per hour; and c) depositing a metal layer onto said plasma-treated surface of said polymeric film layer to the extent that said metal layer has an optical density of at least about 2.0.