Patent ID: 8652376

Claim:
A process for producing nanostructured and/or microstructured surfaces in an adhesive layer, comprising the steps of: (a) providing a relief roll having a surface including a relief representing a negative of a surface structure to be produced indirectly on the adhesive layer, (b) providing a nip roll, (c) arranging the relief roll and the nip roll such as to form a nip, (d) rotating the relief roll and the nip roll in opposite directions, (e) wrapping a web-form carrier material partly around the relief roll, guiding the wrapped relief roll past the nip roll whose speed corresponds to the peripheral speed of the relief roll, (f) applying an adhesive polymer mixture to the rotating nip roll, and (g) guiding the adhesive polymer mixture into the nip such that a near-relief-roll surface of the polymer mixture is shaped according to the relief as imparted from the relief roll through the web-form carrier material onto the near-relief-roll surface of the polymer mixture, and wherein the adhesive polymer mixture does not contact the relief roll, and forms a layer on the web-form carrier material after passage through the nip, and is guided away with the web-form carrier material.