Multilayer laser transfer film for permanently inscribing parts
View Patent ↗A multilayer laser transfer film for permanently inscribing parts made from at least one backing layer, where on at least part of the underside of the backing layer there is a first adhesion layer, characterized in that, on the backing-layer side of the laser transfer film, this being the location of the first adhesion layer, there are at least two pigment layers, preferably a first pigment layer applied to at least part of the material and comprising at least one glass flux pigment, and a second pigment layer applied to at least part of the material and comprising at least one laser-sensitive pigment.
1. A multilayer laser transfer film for durable inscription on components made from at least one backing layer, where on at least part of the underside of the backing layer there is a first adhesion layer, wherein, on the backing-layer side of the laser transfer film on which the first adhesion layer is located, there is at least a first pigment layer applied to at least part of the material and comprising at least one glass flux pigment, and a second pigment layer applied to at least part of the material and comprising at least one laser-sensitive pigment.
2. The multilayer laser transfer film as claimed in claim 1 , wherein the first pigment layer comprises a glass flux pigment and an absorber, and/or the second pigment layer comprises a glass flux pigment, an absorber, and a laser-sensitive pigment.
3. The multilayer laser-transfer film as claimed in claim 1 claim 1 , wherein the matrix of the pigment layers is composed of the adhesive of the first adhesion layer, so that the first adhesion layer and the pigment layers form a single homogeneous layer.
4. The multilayer laser-transfer film as claimed in claim 1 , wherein a second adhesive layer is applied to the second pigment layer comprising the laser-sensitive pigment.
5. The multilayer laser-transfer film as claimed in claim 1 , wherein the backing material comprises films selected from the group consisting of, monoaxially and biaxially stretched films based on polyolefins, and, optionally PVC films, PET films, films based on vinyl polymers, on polyamides, on polyester, on polyacetals, on polycarbonates.
6. The multilayer laser-transfer film of claim 5 , wherein said monoaxially and biaxially stretched films based on polyolefin are films based on stretched polyethylene or on stretched copolymers containing ethylene units and/or polypropylene units.
7. The multilayer laser-transfer film of claim 5 , wherein said monoaxially and biaxially stretched films based on polyolefins and said PVC films, PET films, said films based on vinyl polymers, on polyamides, on polyester, on polyacetals, or on polycarbonates are transparent films.
8. The multilayer laser-transfer film as claimed in claim 1 , wherein the adhesion layer comprises a self-adhesive mass based on natural rubber, on PU, on acrylates, or on styrene-isoprene-styrene block copolymers.
9. The multilayer laser-transfer film as claimed in claim 1 , wherein the backing layer and the adhesive mass are transparent and/or translucent, at least to the extent that there is no absorption of the laser beam during inscription which would lead to their breakdown.
10. The multilayer laser-transfer film as claimed in claim 1 , comprising color pigments and metal salts in the boundary layer or mixtures of pigments with glass particles.
11. The multilayer laser-transfer film of claim 10 , wherein said multilayer laser-transfer films comprise metal oxides.
12. A method for applying a durable inscription to glass, ceramic, and/or metal, which comprises applying same with the multilayer laser-transfer film of claim 1 .
13. A method for applying a durable inscription to coatings or plastics sheets which comprises applying same with the multilayer laser-transfer film of claim 1 .
14. A stamped label comprising the multilayer laser-transfer film of claim 1 .