Patent ID: 8404304

Claim:
A method for an adhesive bonding of plastic films (KF) comprising: priming a plastic film (KF) by applying a one component aqueous polyurethane dispersion composition (PD), containing a polyurethane P 1 and at least one of carbodiimide groups and carboxyl groups, to the plastic film (KF); applying a polyurethane dispersion adhesive (DK) to the plastic film (KF) after priming; and allowing a polyurethane of the polyurethane dispersion adhesive (DK), comprising a polyurethane P 2 and at least one of carbodiimide groups and carboxyl groups, to react with the polyurethane P 1 of the one component aqueous polyurethane dispersion composition (PD), wherein the reaction is a polyaddition reaction that occurs on heating to a temperature of 50° C. or more, and the one component aqueous polyurethane dispersion composition (PD) contains at least one different chemical element or chemical group than the polyurethane dispersion adhesive (DK).