Process for creating three-dimensional patterns in coatings
The present invention relates to a process for the production of three-dimensional patterns in coatings which comprise flake-form effect pigments, to patterned coatings produced thereby and to the use thereof in decoration and security products.
1. A process for the production of three-dimensional patterns in coatings, comprising applying a flowable coating composition to a substrate with formation of a first layer, and contacting the first layer in an unsolidified state with a die which has a surface with raised elements in such a way that the raised elements of the die produce recesses in the first layer, removing the die, and optionally coating the first layer containing recesses with a second coating composition with formation of a second layer, where at least one of the coating compositions comprises flake-form effect pigments, the die is a printing plate for a relief printing process and is a letterpress printing plate, a letterset printing plate or a flexographic printing plate, the recesses in the first layer are not deeper than 10 μm and the layer(s) is (are) solidified.
2. The process according to claim 1 , comprising applying a first layer and a second layer, and solidifying the first layer containing recesses before application of the second layer.
3. The process according to claim 1 , comprising applying a first layer and a second layer, and solidifying the first layer containing recesses and the second layer simultaneously.
4. The process according to claim 1 , wherein the die is a flexographic printing plate.
5. The process according to claim 1 , wherein the first layer comprises flake-form effect pigments.
6. The process according to claim 1 , wherein the second layer comprises flake-form effect pigments.
7. The process according to claim 1 , comprising applying the first layer and/or second layer are applied by means of a printing process.
8. The process according to claim 7 , wherein the printing process is a gravure printing process, a screen printing process, paper coating process, a flexographic printing process, a pad printing process, an offset printing process, an offset overprint varnishing process or bronzing process.
9. The process according to claim 1 , comprising applying the first layer and/or second layer by a flexographic printing process or an offset overprint varnishing process.
10. The process according to claim 1 , comprising solidifying the first layer and/or second layer by means of UV radiation.
11. The process according to claim 1 , wherein the flake-form effect pigments are pearlescent pigments, interference pigments, metal-effect pigments, liquid-crystal pigments, flake-form functional pigments, flake-form structured pigments, or a mixture thereof.
12. A coating on a substrate which has a three-dimensional pattern and comprises a first layer and optionally a second layer located thereon, in each case solidified or solid, where at least one of the layers comprises flake-form effect pigments, where the first layer has on its upper side recesses which are not deeper than 10 μm and where the coating is obtainable by a process according to claim 1 .
13. The coating according to claim 12 , wherein the recesses present in the solidified first layer are not perceptible by touch by humans.
14. The coating according to claim 12 , where the substrate is paper, cardboard, wallpaper, a laminate, a tissue material, wood, a polymer, a metal, a security printing product or a material which comprises constituents of a plurality of these substances, and where the substrate has optionally been electrostatically pretreated and/or provided with a primer layer and/or another anchoring layer.
15. A product which has a surface which has a three-dimensional pattern, produced by a process according to claim 1 , in a coating on a substrate made of paper, cardboard, wallpaper, a laminate, a tissue material, wood, a metal, a polymer, a security printing product or made of a material which comprises constituents comprising a plurality of these substances, and where the substrate has optionally been electrostatically pretreated and/or provided with a primer layer and/or another anchoring layer.
16. The product according to claim 15 which is a decoration material or security product.
17. The coating according to claim 14 , wherein the polymer is a polymeric film and the metal is a metal foil.
18. The product according to claim 15 , wherein the polymer is a polymeric film and the metal is a metal foil.