Method for producing a security element and transfer film

Patent metadata

Field	Value
Publication number	US-11124011-B2
Application number	US-201616061199-A
Country	US
Kind code	B2
Filing date	Dec 13, 2016
Priority date	Dec 15, 2015
Publication date	Sep 21, 2021
Grant date	Sep 21, 2021

Abstract

A method for producing a security element, wherein a base film is provided, which has a first carrier film and a single- or multilayered decorative ply,wherein a first adhesive layer is applied to a second carrier film and a second adhesive layer is applied to the surface of the first carrier film facing away from the decorative ply or wherein the second adhesive layer is applied to the surface of the first carrier film facing away from the decorative ply and the first adhesive layer is applied to the second adhesive layer,and wherein the second carrier film is applied to the first carrier film such that the first adhesive layer and the second adhesive layer are arranged between the first carrier film and the second carrier film.

First claim

The invention claimed is:

1. A transfer film for the transfer of one or more multilayer bodies onto a target substrate, wherein the transfer film has a base film, which has a first carrier film and a single- or multilayered decorative ply, the first carrier film having a surface facing the decorative ply and an opposite surface facing away from the decorative ply,
wherein the transfer film further has a second carrier film with a first adhesive layer and a second adhesive layer applied to the opposite surface of the first carrier film, wherein the first adhesive layer and the second adhesive layer are arranged between the first carrier film and the second carrier film, and
wherein the first adhesive layer is activated in a first region at least partially covering at least one first partial region of the base film, with the result that the base film adheres to the second carrier film in the at least one first partial region, and
wherein the first adhesive layer is not activated, not provided, only partially provided or deactivated in a second region adjoining the first region, whereby the first adhesive layer is not activated, not provided, only partially provided or deactivated in a second partial region of the base film adjoining the at least one first partial region, and
wherein the first carrier film is severed along a boundary line defining the at least one first partial region and separating the at least one first partial region from the second partial region of the base film and a part of the base film comprising the second partial region is removed from the second carrier film.

2. The transfer film according to claim 1 , wherein the base film comprises a detachment layer arranged between the first carrier film and the decorative ply, which makes it possible to separate the decorative ply from the first carrier film.

3. The transfer film according to claim 1 , wherein the base film has a detachment system arranged between the first carrier film and the second carrier film, which makes it possible to separate the base film from the second carrier film.

4. The transfer film according to claim 3 , wherein the detachment system has a thickness between 0.01 μm and 4 μm.

5. The transfer film according to claim 3 , wherein the detachment system has a wax material.

6. The transfer film according to claim 3 , wherein the detachment system is formed multilayered, wherein the detachment system comprises a layer made of wax and a layer made of a varnish.

7. The transfer film according to claim 6 , wherein acrylates, polyurethanes or cellulose derivatives are used as varnish.

8. The transfer film according to claim 6 , wherein the layer made of varnish has a thickness between 0. μm and 3 μm.

9. The transfer film according to claim 1 , wherein the decorative ply has a surface facing away from the first carrier film and the transfer film has a third adhesive layer applied to the decorative ply on the surface facing away from the first carrier film, and wherein an adhesive strength produced by the second adhesive layer between the first carrier film and the second carrier film is lower than an adhesive strength produced between the decorative ply and the target substrate by the activated third adhesive layer.

10. The transfer film according to claim 1 , wherein the second carrier film is a plastic film with a thickness of more than 6 μm.

11. The transfer film according to claim 1 , wherein the first carrier film is a plastic film with a thickness of more than 4 μm.

12. The transfer film according to claim 1 , wherein two or more first partial regions are provided and each of these first partial regions is surrounded by the second partial region formed as a coherent region.

13. The transfer film according to claim 1 , wherein the first region covers at least 50% of each of the at least one first partial region.

14. The transfer film according to claim 1 , wherein the first region completely covers each of the at least one first partial region.

15. The transfer film according to claim 1 , wherein the second partial region covers the first region by less than 5%.

16. The transfer film according to claim 1 , wherein the decorative ply has the one or more layers generating an optically variable effect.

17. The transfer film according to claim 16 , wherein the decorative ply has a replication varnish layer with a surface structure molded into the replication varnish layer, the surface structure comprising at least one of a diffractive surface structure, lens structure, matte structure and blazed grating.

18. The transfer film according to claim 16 , wherein the decorative ply has a reflective layer formed patterned in the form of a first item of information.

19. The transfer film according to claim 16 , wherein the decorative ply has a thin-film layer element for generating a color shift effect dependent on a viewing angle.

20. The transfer film according to claim 16 , wherein the decorative ply has a color layer formed patterned in the form of a second item of information.

21. The transfer film according to claim 16 , wherein the decorative ply has a volume hologram.

22. The transfer film according to claim 1 , wherein the base film is a hot-stamping film.

23. The transfer film according to claim 1 , wherein the base film is a laminating film.

Assignees

• Ovd Kinegram Ag

Inventors

• Cathomen Anja
• Neel Marjorie Annabelle

Classifications

• B42D25/47 Primary

  using adhesives · CPC title

• B42D25/46

  using pressure · CPC title

• B32B37/12

  characterised by using adhesives · CPC title

• B42D25/455 Primary

  using heat · CPC title

• B42D25/351

  Translucent or partly translucent parts, e.g. windows · CPC title