Method for producing a structured surface

摘要

The method for producing a structured surface on a carrier material (12), comprises coating the carrier material with a silicate-based sol-gel-lacquer, partially hardening the coating, structuring the partially-hardened coating through stamping by a matrix (16), and completely hardening the stamped coating (14). The matrix for producing the structured surface comprises a stamping structure (18) with three dimensional stamping elements (20) with dimensions in a range of 30 nm to 30 mu m. The partial hardening and complete hardening of the coating are continuously carried out at 140-160[deg] C. The method for producing a structured surface on a carrier material (12), comprises coating the carrier material with a silicate-based sol-gel-lacquer, partially hardening the coating, structuring the partially-hardened coating through stamping by a matrix (16), and completely hardening the stamped coating (14). The matrix for producing the structured surface comprises a stamping structure (18) with three dimensional stamping elements (20) with dimensions in a range of 30 nm to 30 mu m. The partial hardening and complete hardening of the coating are continuously carried out at 140-160[deg] C in a continuous furnace. The stamping is continuously carried out with a stamping roller as matrix or with a heating matrix or in a heating chamber. The partial hardening of the coating and the structuring are partially carried out in single process. The carrier material consists of aluminum or aluminum alloy. The sol-gel-lacquer is polysiloxane produced by acid-catalyzed hydrolysis and condensation of a mixture of a first solution containing alkoxy silane and a second solution containing a colloidal silicic acid. The first solution is a solution with a first and second alkoxy silane and a solvent mixed with the first solution. The first alkoxy silane is tetraethoxysilane and the second alkoxy silane is methyl triethoxysilane. The solvent of the first solution is a polar solvent such as alcohol or ethylacetate. The alcoholic solvent consists of glycol or glycol compound and is ethylene glycol or buthoxyethanol.