Patent ID: 6962640

Claim:
A method of producing an embossing roller having an embossing surface made of silicone rubber for continuously embossing the surface of a thermoplastic film, the embossing surface having a negative form of a to-be-embossed surface structure: a) first an auxiliary roller is produced, which is comprised of a layer of a material at least in the region of its circumferential surface; b) the circumferential surface being smooth; c) a laser beam being directed at the circumferential surface; d) the laser beam moving relative to the circumferential surface, and being controlled in accordance with a respective surface structure site of a real or imaginary pattern—present as data—such that the pattern surface structure is produced as a positive structure in the circumferential surface of the auxiliary roller; e) a layer of silicone rubber of uniform thickness being poured or spread onto the positively structured circumferential surface of the auxiliary roller thus formed, and vulcanized to produce an embossing copy; f) the embossing copy being removed from the circumferential surface of the auxiliary roller, being turned inside out, and with the negative-structured embossing surface facing outwardly and being adhered to a circumferential surface of an embossing roller; and g) the material in the region of the circumferential surface of the auxiliary roller being nitrile butadiene rubber (NbR).