Transfer Film and Method for Producing a Transfer Film

Abstract

The invention relates to a transfer film (1), in particular hot-stamping film, the use of a transfer film (1), a film, a security document (2), and a method for producing a transfer film (1). Here, it is provided that the transfer film (1) comprises a transfer layer (20) detachably arranged on a carrier layer (10). The transfer layer (20) further has at least one first color layer (30) and the at least one first color layer (30) comprises at least one binder and at least first pigments, the color appearance of which changes depending on the observation angle.

Claims

1. A transfer film comprising a transfer layer detachably arranged on a carrier layer, wherein the transfer layer has at least one first color layer and wherein the at least one first color layer comprises at least one binder and at least first pigments, the color appearance of which changes depending on the observation angle, wherein the at least one first color layer is present in at least one first area of the transfer layer and is not present in at least one second area of the transfer layer, wherein the transfer layer has a first compensation layer which overlaps the at least one first area of the transfer layer and the at least one second area of the transfer layer, and wherein the layer thickness of the first compensation layer lies in the range of from 10% to 50% of the layer thickness of the at least one first color layer.

2. (canceled)

3. The transfer film according to claim 1, wherein the at least one first area represents a first item of information, in the form of a pattern, motif or a logo.

4. (canceled)

5. (canceled)

6. (canceled)

7. The transfer film according to claim 1, wherein at least one second color layer is present in at least one third area of the transfer layer and is not present in at least one fourth area of the transfer layer, wherein the at least one third area of the transfer layer overlaps the at least one first area of the transfer layer or the at least one third area of the transfer layer does not overlap the at least one second area of the transfer layer.

8. The transfer film (1) according to claim 7, wherein the transfer layer has a second compensation layer which, in the at least one fourth area of the transfer layer, at least corresponds to the layer thickness of the at least one second color layer in the at least one third area of the transfer layer.

9. The transfer film according to claim 8, wherein the first compensation layer and/or the second compensation layer has a layer thickness between 3 μm and 50 μm.

10. The transfer film according to claim 8, wherein the first compensation layer and/or the second compensation layer is transparent and/or colorless.

11. The transfer film according to claim 8, wherein the first compensation layer and/or the second compensation layer is formed as a bonding layer.

12. The transfer film according to claim 1, wherein the at least one first color layer has a thickness between 3 μm and 30 μm.

13. The transfer film according to claim 1, wherein the transfer layer has at least one first stabilizing layer which mechanically stabilizes the transfer layer.

14. The transfer film according to claim 13, wherein the at least one first stabilizing layer is arranged between the carrier layer and the at least one first color layer.

15. The transfer film according to claim 14, wherein a second stabilizing layer is applied to the side of the at least one first color layer facing away from the first stabilizing layer.

16. The transfer film according to claim 13, wherein the at least one first stabilizing layer is applied to the side of the at least one first color layer facing away from the carrier layer.

17. The transfer film according to claim 13, wherein the at least one first stabilizing layer and/or the second stabilizing layer has a layer thickness between 0.2 μm and 7.5 μm.

18. The transfer film according to claim 13, wherein the at least one first stabilizing layer and/or the second stabilizing layer is cross-linked, chemically and/or by irradiation with UV light and/or irradiation with electron beams.

19. The transfer film according to claim 13, wherein the at least one first stabilizing layer and/or the second stabilizing layer is a layer cured by electromagnetic radiation.

20. The transfer film according to claim 13, wherein the at least one first stabilizing layer and/or the second stabilizing layer is transparent or translucent.

21. The transfer film according to claim 1, wherein the carrier layer has a layer thickness between 12 μm and 50 μm.

22. The transfer film according to claim 1, wherein the transfer layer comprises a detachment layer which allows the separation of the transfer layer from the carrier layer.

23. The transfer film according to claim 22, wherein the detachment layer has a layer thickness between 0.2 μm and 4 μm.

24. The transfer film according to claim 1, wherein the carrier layer comprises a separating layer curable by means of UV light or electron beams, which allows the separation of the transfer layer from the carrier layer.

25. The transfer film according to claim 1, wherein the transfer layer has a primer layer, wherein the at least one first color layer is applied to the primer layer.

26. The transfer film according to claim 25, wherein the primer layer has a layer thickness between 0.01 μm and 0.5 μm.

27. The transfer film according to claim 1, wherein the transfer layer has at least one replication varnish layer.

28. The transfer film according to claim 27, wherein a surface structure is molded into the surface of the replication varnish layer in at least one fifth area of the transfer layer.

29. The transfer film according to claim 28, wherein the surface structure is not molded into the surface of the replication varnish layer in the at least one first area of the transfer layer.

30. The transfer film according to claim 28, wherein the refractive index of the replication varnish layer differs from the refractive index of the binder by less than 0.2.

31. The transfer film according to claim 28, wherein the surface structure is selected from the group of diffractive surface structures, Kinegram or holograms, zero-order diffraction structures, blazed gratings, linear or crossed sinusoidal diffraction gratings, linear or crossed single- or multi-step rectangular gratings, asymmetrical saw-tooth relief structures, light-diffracting and/or light-refracting and/or light-focusing micro- or nanostructures, binary or continuous Fresnel lenses, binary or continuous Fresnel freeform surfaces, diffractive or refractive macrostructures, lens structures or microprism structures, mirror surfaces and mat structures, anisotropic or isotropic mat structures, or combinations of these structures.

32. The transfer film according to claim 28, wherein the at least one fifth area of the transfer layer represents a second item of information in the form of a pattern, motif or a logo.

33. The transfer film according to claim 27, wherein the replication varnish layer is thermoplastically deformable and/or is cross-linked by irradiation with UV light.

34. The transfer film according to claim 27, wherein the replication varnish layer has a layer thickness between 0.2 μm and 4 μm.

35. The transfer film according to claim 1, wherein the transfer layer has a reflecting layer in at least one sixth area of the transfer layer, wherein the surface coverage of the at least one sixth area of the transfer layer, is less than 30% of the total surface area of the transfer layer.

36. The transfer film according to claim 35, wherein the reflecting layer in the at least one sixth area of the transfer layer is applied to the side of the at least one first color layer facing away from the carrier film.

37. The transfer film according to claim 35, wherein the at least one sixth area of the transfer layer represents a third item of information in the form of a pattern, motif or a logo.

38. The transfer film according to claim 1, wherein the transfer layer contains at least one mark in at least one seventh area of the transfer layer for determining the at least one first area of the transfer layer and/or the at least one third area of the transfer layer and/or the at least one fifth area of the transfer layer and/or the at least one sixth area of the transfer layer.

39. The transfer film according to claim 1, wherein the first pigments have a diameter between 1 μm and 100 μm and a thickness between 0.1 μm and 5 μm.

40. The transfer film according to claim 1, wherein the at least one first color layer contains second pigments.

41. The transfer film according to claim 40, wherein the at least one first color layer contains third pigments which, in the case of irradiation with electromagnetic radiation emit light from the wavelength range visible to the human eye.

42. The transfer film according to claim 1, wherein the proportion of the at least first pigments in the at least one binder of the at least one first color layer is less than 50%.

43. The transfer film according to claim 1, wherein the at least one first color layer contains soluble dyes in the at least one binder.

44. The transfer film according to claim 1, wherein the first pigments are formed as flakes and exhibit a substantially similar orientation to each other with respect to the surface normal established by the plane spanned by the transfer layer.

45. The transfer film according to claim 1, wherein the orientation of the first pigments with respect to the surface normal established by the plane spanned by the transfer layer and a coordinate system spanned by the transfer layer is locally varied.

46. The transfer film according to claim 1, wherein the first pigments are magnetic and/or have one or more metal layers.

47. The transfer film according to claim 1, wherein the transfer layer is present in at least one first zone and is not present in at least one second zone, wherein the first zones of the transfer layer are formed patterned.

48. (canceled)

49. A film with a first surface and a second surface, wherein one or more transfer films according to claim 1 are applied to the second surface of the film with the side of the carrier layers facing away from the transfer layers of the one or more transfer films, and between the one or more transfer films and the film, a second bonding layer is applied, which connects the one or more transfer films to the film, wherein the bonding strength of the second bonding layer exceeds the bonding strength between the one or more transfer layers and the one or more carrier layers of the one or more transfer films or vice versa.

50. A security produced with one or more transfer films according to claim 1.

51. The security document according to claim 50, wherein one or more transfer layers of the one or more transfer films are arranged on a surface of a first carrier substrate made of paper or plastic.

52. The security document according to claim 51, wherein the one or more transfer layers arranged on the surface of the first carrier substrate are laminated or adhesively bonded, to a polycarbonate layer.

53. A method for producing a transfer film according to claim 1, wherein a carrier layer is provided in the method, which has a transfer layer, wherein at least one first color layer is applied to the side of the transfer layer facing away from the carrier layer, wherein the at least one first color layer comprises at least one binder and at least first pigments, the color appearance of which changes depending on the observation angle.

54. The method according to claim 53, wherein the at least one first color layer is applied by means of screen printing.

55. The method according to claim 53, wherein the transfer layer is completely severed by means of punching along a boundary line defining the at least one first zone of the transfer layer and separating the at least one first zone from the at least one second zone of the transfer layer.

Description

[0103] Embodiment examples of the invention are explained below by way of example with the aid of the attached figures.

[0104] FIG. 1 shows a schematic sectional representation of a transfer film

[0105] FIG. 2a to FIG. 2c show schematic representations to illustrate the use of a transfer film

[0106] FIG. 3a to FIG. 6b show schematic sectional representations of transfer films

[0107] FIG. 7a and FIG. 7b show schematic representations to illustrate the use of a transfer film

[0108] FIG. 8a and FIG. 8b show schematic sectional representations of a transfer film

[0109] FIG. 9a to FIG. 9c show schematic top views of a transfer film

[0110] FIG. 10 shows a schematic sectional representation of a security document to illustrate the use of a transfer film

[0111] FIG. 11 shows a schematic sectional representation of a security document to illustrate the use of a transfer film

[0112] FIG. 1 shows a transfer film 1 with a carrier layer 10, a wax layer 22 and a transfer layer 20, which comprises a detachment layer 24, a color layer 30 and a bonding layer 92.

[0113] The carrier layer 10 is preferably a PET, PEN, OPP, BOPP, PE or cellulose acetate film with a thickness between 12 μm and 50 μm. The carrier layer 10 shown in FIG. 1 is a PET film with a layer thickness of 19 μm.

[0114] The wax layer 22 and the transfer layer 20 are now applied to the carrier layer 10 successively, by applying further layers. The wax layer 22 here has a thickness of 10 nm. Typical layer thicknesses for the wax layer 22 lie in the range of from 1 nm to 100 nm. A detachment layer 24 with a thickness of from 0.2 μm to 2 μm is applied to the wax layer 22. The detachment layer 24 shown in FIG. 1 is a thermoplastic detachment layer 24 with a thickness of 0.95 μm. The wax layer 22, together with the detachment layer 24, ensures separation from the carrier layer 10. The detachment layer 24, in particular after transfer of the transfer layer 20, represents the top layer. Thus for example because of the heat occurring during a hot-stamping procedure, the wax layer is softened and a secure separation of the detachment layer 24 from the wax layer 22 is hereby achieved.

[0115] The color layer 30 is preferably an OVI layer with a thickness between 3 μm and 30 μm. The color layer 30 thus comprises a binder and pigments, the color appearance of which changes depending on the observation angle and in particular generates a color-change effect.

[0116] The pigments in the color layer 30 preferably have a diameter between 1 μm and 100 μm. The color-change effect of the pigments can appear for a human observer for example from green to brown or from green to violet. The pigments of the color layer 30 which produce such a color-change effect, are here preferably substantially similarly oriented to each other, with respect to the surface normal established by the plane spanned by the transfer layer 20. The orientation of the pigments with respect to each other can however be locally varied; for this the pigments can for example be magnetic.

[0117] It is also possible that the color layer 30 contains further pigments such as preferably flakes, charms, taggants, reflective pigments or pigments formed as flakes, which have a diffractive structure.

[0118] Furthermore, it is possible that the color layer 30 contains pigments which, in the case of irradiation with electromagnetic radiation, in particular irradiation with UV or IR light, emit light from the wavelength range visible to the human eye, in particular in the wavelength range from 400 nm to 800 nm. The color layer 30 can also contain for example soluble dyes which for example stain the color layer 30 corresponding to the added dyes. The color layer 30 shown in FIG. 1 has a layer thickness between 10 μm and 12 μm. The color layer 30 can for example be applied by means of a screen printing process.

[0119] The bonding layer 92 is then applied with a layer thickness of from approximately 2 μm to 8 μm. The bonding layer 92 shown in FIG. 1 has a layer thickness of 4.5 μm. The bonding layer 92 preferably consists of a thermally activatable adhesive and is applied to the layer 30 over the whole surface, for example by means of a doctor blade. It is here possible that the bonding layer has a compensating effect on the layer thickness of the color layer 30, if the latter comprises for example fluctuations in the layer thickness. The bonding layer 92 is preferably a layer made of acrylate, PVC, polyurethane or polyester.

[0120] The transfer layer 20 can for example be transferred onto a target substrate by means of hot stamping. Furthermore, it is possible to transfer the transfer layer 20 by means of cold transfer. A UV-curable adhesive can for example be used as bonding layer here. In the case of cold transfer, but also in the case of hot stamping, the bonding layer can preferably either be part of the transfer layer or also alternatively or additionally thereto be applied to the target substrate. The curing of the UV-curing adhesive can take place through the color layer, if the color layer exhibits sufficient transmission for UV light, or through the target substrate, if the target substrate is at least partially transparent to UV light. The latter applies in particular in the case of polymer substrates such as for example polycarbonate, polyester, polyethylene or polypropylene.

[0121] The bonding layer 92 can also be applied patterned to the target substrate, for example by a printing process. This process is suitable in particular in the case of application by means of cold transfer. However, it can also be used with thermally activatable adhesives in the case of hot stamping.

[0122] FIG. 2a to FIG. 2c illustrate the use of a transfer film 1 according to a further embodiment example of the invention. FIG. 2a shows a transfer film 1 with a carrier layer 10, a wax layer 22 and a transfer layer 20, which comprises a detachment layer 24, a color layer 30 and a compensation layer 90.

[0123] In the embodiment example of FIG. 2a, the transfer layer 20 has three areas 40 and four areas 42 surrounding the areas 40. The number of areas 40 and areas 42 is selected here purely by way of illustration. It is thus possible that for example only one area 40 and one area 42 are present or that a plurality of areas 40 and areas 42 are present. The areas 40 here represent the part of the transfer layer 20 which has the color layer 30.

[0124] The compensation layer 90 is preferably a layer made of acrylate, PVC, polyurethane or polyester with a layer thickness between 2 μm and 50 μm. The compensation layer 90 in FIG. 2a is thus a bonding layer as explained in FIG. 1, which overlaps the color layer 30 applied in the areas 40 and fills in the areas 42. The compensation layer 90 in FIG. 2a has a layer thickness of 25 μm.

[0125] It is however also possible that the compensation layer 90 is also present in a smaller layer thickness, in particular in a layer thickness smaller than the color layer 30, whereby the areas 40 and 42 are overlapped, and the areas 42 are only covered, but not filled in.

[0126] Furthermore, it is possible that the compensation layer 90 is a layer made of polymethyl acrylate, dipentaerythriol pentaacrylates or polysiloxane resin, which comprises a photoinitiator such as for example Irgacure and can be cross-linked by means of UV light. Alternatively, the compensation layer can consist of acrylate, polyester, polyvinyl alcohols or alkyd resins and be chemically cross-linked by means of isocyanate. In such a case, the transfer layer would in addition have a bonding layer which is applied to the compensation layer 90. With respect to the embodiment of such a bonding layer, reference is made here to the statements of FIG. 1.

[0127] FIG. 2b now shows the top view of the transfer film 1 of FIG. 2a. As shown in FIG. 2b, the color layer 30 is here applied patterned in the form of the letters “CH” in the areas 40. Furthermore, in three areas 43, marks 50 are applied, which serve to determine the areas 40. The marks 50 represent register marks or registration marks, using which the accurately positioned arrangement of layers that are superimposed or juxtaposed relative to one another, maintaining a desired positional tolerance, can be recognized.

[0128] With respect to the embodiment of the carrier layer 10, the wax layer 22, the detachment layer 24 and the color layer 30 reference is made here to the statements of FIG. 1.

[0129] FIG. 2c now shows the top view of a security document 2, to which an area 45 of the transfer layer 20 of FIG. 2a and FIG. 2b is applied. The security document 2 is a security document made of polycarbonate. The area 45 of the transfer layer 20 which comprises one of the areas 40 and a partial area of the areas 42 is for example transferred by hot stamping onto the security document 2 by means of a hot embossing stamp. The shape of the area 45 is determined by the stamp shape of the hot embossing stamp. The transfer takes place for example by optical detection of one of the marks 50 by means of an optical sensor, which detects the marks 50, for example because of their opacity in comparison with the areas 42, and then controls the application of the area 45 of the transfer layer 20 by means of the embossing stamp. In FIG. 2c, the area 45 of the transfer layer 20 is now applied to the security document 2, with the result that the security document 2 now has the letters “CH” having a color-change effect.

[0130] FIG. 3a to FIG. 6b show different embodiment variants of the transfer film 1 according to the invention. FIG. 3a, FIG. 4a, FIG. 5a and FIG. 6a show the different embodiment variants of the transfer film 1 before separation of the transfer layers 20 and FIG. 3b, FIG. 4b, FIG. 5b and FIG. 6b show the corresponding embodiment variants after separation of the transfer layers 20.

[0131] In the embodiment example shown in FIG. 3a the transfer film 1 comprises a carrier layer 10, a wax layer 22 and a transfer layer 20, which comprises a detachment layer 24, a stabilizing layer 60, a replication varnish layer 70, a primer layer 80, a color layer 30 and a compensation layer 90.

[0132] The stabilizing layer 60 is preferably a layer made of acrylate, polyester, polyvinyl alcohols or alkyd resins, which is chemically cross-linked for example by means of isocyanate. Furthermore, layers made of polymethyl acrylate, dipentaerythriol pentaacrylates or polysiloxane resin, which are provided with a photoinitiator such as for example Irgacure, can for example be used. Such a stabilizing layer can be cross-linked through the photoinitiator by irradiation by means of UV light. The stabilizing layer 60 preferably has a layer thickness between 0.2 μm and 5 μm. The stabilizing layer shown in FIG. 3a is a chemically cross-linked stabilizing layer with a thickness of approximately 0.7 μm.

[0133] The replication varnish layer 70 consists of a thermoplastic lacquer into which a surface structure is molded by means of heat and pressure by the action of a stamping tool. It is further also possible that the replication varnish layer 70 is formed by a UV-cross-linkable lacquer and the surface structure is molded into the replication varnish layer 60 by means of UV replication. The surface structure is molded onto the uncured replication varnish layer by the action of a stamping tool and the replication varnish layer is cured directly during or after the molding by irradiation with UV light.

[0134] The replication varnish layer 70 preferably has a layer thickness between 0.2 μm and 2 μm. The layer thickness of the replication varnish layer 70 in FIG. 3a is 0.5 μm and it is an at least partially chemically cross-linked replication varnish layer. The surface structure molded into the replication varnish layer 70 is preferably a diffractive surface structure, for example a hologram, Kinegram® or another optically diffractive active grating structure. Such surface structures typically have a spacing of the structural elements in the range of from 0.1 μm to 4 μm. It is further also possible that the surface structure is a zero-order diffraction structure, a blazed grating, a preferably linear or crossed sinusoidal diffraction grating, a linear or crossed single- or multi-step rectangular grating, an asymmetrical saw-tooth relief structure, a light-diffracting and/or light-refracting and/or light-focusing micro- or nanostructure, a binary or continuous Fresnel lens, a binary or continuous Fresnel freeform surface; a diffractive or refractive macrostructure, in particular lens structure or microprism structure, a mirror surface or mat structure, in particular anisotropic or isotropic mat structure, or a combination structure of several of the above-named surface structures. The surface structures molded into the replication varnish layer 70 are, in FIG. 3a, molded into an area 44 which is surrounded by the areas 42, and is thus present in the case of perpendicular observation of the transfer film next to the areas 40 comprising the color layer.

[0135] It is further possible that a reflecting layer is applied to the replication varnish layer 70. The reflecting layer is preferably a metal layer made of chromium, gold, copper, silver or an alloy of such metals, which is vapor-deposited in a layer thickness of from 0.01 μm to 0.15 μm under vacuum. It is further also possible that the reflecting layer is formed by a transparent reflecting layer, for example a thin or finely structured metallic layer or an HRI (high refraction index) or LRI (low refraction index) layer. Such a dielectric reflecting layer consists, for example, of a vapor-deposited layer made of a metal oxide, metal sulfide, titanium oxide etc. of a thickness of from 10 nm to 150 nm.

[0136] The primer layer 80 is a layer which preferably comprises acrylates, PVC, polyurethane or polyester and has a layer thickness between 0.01 μm and 0.5 μm. The primer layer shown in FIG. 3a has a layer thickness of 0.06 μm.

[0137] With respect to the embodiment of the further layers in FIG. 3a, reference is made here to the above statements.

[0138] The transfer film 1 of the embodiment example of FIG. 4a corresponds to the transfer film 1 of the embodiment example of FIG. 3a with the difference that the transfer film according to FIG. 4a has no replication varnish layer.

[0139] The transfer film 1 of the embodiment example of FIG. 5a corresponds to the transfer film 1 of the embodiment example of FIG. 4a with the difference that the compensation layer 90 is formed as a stabilizing layer and the transfer layer 20 additionally has a bonding layer 92. For this, the compensation layer 90 is formed from the material of the stabilizing layer as described above and the stabilizing layer 60 between the detachment layer 24 and the primer layer 80, as shown in FIG. 4a, is removed. With respect to the embodiment of the bonding layer 92, reference is made here to the above statements.

[0140] The transfer film 1 of the embodiment example of FIG. 6a corresponds to the transfer film 1 of the embodiment example of FIG. 4a with the difference that the wax layer 22 has been replaced with a varnish layer 23 that can be cured by means of UV light or electron beams.

[0141] FIG. 7a and FIG. 7b illustrate the use of a transfer film 1 on a further film 12. FIG. 7a shows a top view of a film 12, FIG. 7b a cross-section of the film 12. As can be seen in FIG. 7b, one or more transfer films 1 are applied to the film 12. The one or more transfer films 1 are connected to the carrier layers 10 with the film 12 by a bonding layer. The transfer layers 20, which comprise the detachment layers 24, the color layers 30 and the compensation layers 90, are applied to the carrier layers 10 of the one or more transfer films 1. As can be seen in FIG. 7a, the film 12 has marks 50 which can preferably be formed as a rectangle, lines or stripes and run transverse to the longitudinal direction of the film web which forms the film 12. The one or more transfer films 1 applied to the film 12 can now be applied to a target substrate. If the film 12 is removed, the transfer layers 20 separate from the carrier layers 10 of the one or more transfer films 1 and the transfer layers are transferred onto the target substrate corresponding to their arrangement on the film 10. The carrier layers 10 of the one or more transfer films 1 remain on the film 12.

[0142] It can also be provided that the arrangement of the bonding layer between the carrier layers 10 and the film 12 as well as of the detachment layer 24 between the carrier layers 10 and the transfer layers 20 is reversed. Thus, a detachment layer is arranged in each case between the film 12 and the carrier layers 10, and the carrier layers 10 are connected to the transfer layers 20 in each case by a bonding layer. This has the effect that, during application to a target substrate, the carrier layers 10 of the film 12 are transferred together with the transfer layers 20, and thus the carrier layers 10 become part of the transfer layers 20. Consequently self-supporting small areas are transferred through the carrier layers 10. The mechanical stability of the transfer layers 20 is increased by the carrier layers 10 also transferred.

[0143] FIG. 8a and FIG. 8b show sectional representations of a transfer film according to a further embodiment example of the invention. The transfer film 1 of FIG. 8a and FIG. 8b consists of a carrier layer 10, and a transfer layer 20, which comprises a detachment layer 24, a color layer 30 and a compensation layer 90. With respect to the embodiment of the layers, reference is made here to the above statements. As shown in FIG. 8a, the transfer layer 20 of the transfer film 1 is severed along the boundary line formed by three zones 46 and four zones 48. The transfer layer 20 is preferably severed by means of punching. The punching can take place by means of a mechanical tool or by means of a laser. As shown in FIG. 8a, the area 40 which comprises the color layer 30 surrounds each of the three zones 46. The shape of the punch thus predefines the shape of the zones 46. The number of zones 46 and zones 48 is selected here purely by way of illustration. It is thus possible that for example only one zone 46 and one zone 48 are present or that a plurality of zones 46 and zones 48 are present. As shown in FIG. 8b, the transfer layers 20 can be removed from the zones 48, with the result that only the transfer layers 20 of the zones 46 remain on the carrier layer 10. The latter can then be transferred onto a target substrate for example by means of a stamping process.

[0144] FIG. 9a and FIG. 9c show schematic top views according to a further embodiment of the invention.

[0145] FIG. 9a shows a transfer film 1 which has a color layer in three areas 40 and a Kinegram® in the areas 44 in each case. The areas 44, as shown in FIG. 9a, lie within the area 42 in which no color layer is applied. The color layer is here applied in the form of the letters “CH” in the areas 40 within the transfer layers, and the Kinegram® elements are stamped into a replication varnish layer of the transfer layers, in the form of a pattern in the areas 44. Furthermore, in areas 43, marks 50 are applied, which serve to determine the relative position of the areas 40 and 44. As can be seen in FIG. 9a, each security feature thus has, in each case, a separate mark 50 in the form of the areas 40 forming the letters “CH” and the areas 44 forming the Kinegram® elements. It is hereby possible that the letters “CH” which form a first security feature and the Kinegram® elements which form a second security feature can be detected and stamped separately. This can take place, for example, with two different embossing stamps.

[0146] The transfer film 1 of the embodiment example of FIG. 9b corresponds to the transfer film 1 of the embodiment example of FIG. 9a with the difference that the areas 40 which form the letters “CH” and the areas 44 which comprise the Kinegram® elements together have a common mark 50. In each case one of the areas 40 comprising the color layer and the area 44 comprising a Kinegram® is hereby detected and stamped jointly. This can take place, for example, with one common embossing stamp.

[0147] The transfer film 1 of the embodiment example of FIG. 9c corresponds to the transfer film 1 of the embodiment example of FIG. 9b with the difference that within the area 42 in which no color layer is applied, further areas 47 and 49 are present. The areas 47 are metalized areas 47 in the form of the logo “Swiss”. Furthermore, it is for example possible that the logo is designed as nanotext and thus is not visible to the naked human eye. Furthermore, the transfer film has a second color layer in the form of a cross in the areas 49. The transfer film 1 thus has a first color layer in the areas 40 and a second color layer in the areas 49. The pigments of the first and second color layer preferably differ, with the result that different color effects can be perceived in the first areas 40 and areas 49.

[0148] FIG. 10 shows a schematic sectional representation of a security document 2, to which a transfer layer 20 of a transfer film 1 according to the invention is applied. The transfer layer 20 is applied to a carrier substrate 14. The carrier substrate 14 can for example be a paper-based carrier substrate 14, such as for example a passport, a visa, a banknote or a certificate. It is also possible that the carrier substrate 14 is a plastic substrate, such as for example polycarbonate, PVC, PET, or PET-G. The carrier substrate 14 can likewise be a hybrid substrate made of paper and plastic layers, wherein either a paper layer or a plastic layer forms the outermost layer to which the transfer layer 20 is applied. The transfer layer 20 has a detachment layer 24, a stabilizing layer 60, a replication varnish layer 70, a primer layer 80, a color layer 30 and a compensation layer 90. With respect to the embodiment of the layers, reference is made here to the above statements.

[0149] FIG. 11 shows a schematic sectional representation of a security document 2, into which a transfer layer 20 of a transfer film 1 according to the invention is laminated. The transfer layer 20 is applied to a carrier substrate 14 made of plastic, such as for example polycarbonate. The carrier substrate 14 is then laminated with one or more further plastic layers 16 to form a composite. The transfer layer 20 has a detachment layer 24, a color layer 30 and a compensation layer 90. With respect to the embodiment of the layers, reference is made here to the above statements.

LIST OF REFERENCE NUMBERS

[0150] 1 transfer film [0151] 2 security document [0152] 10 carrier layer [0153] 12 film [0154] 14 carrier substrate [0155] 16 plastic layer [0156] 20 transfer layer [0157] 22 wax layer [0158] 24 detachment layer [0159] 30 color layer [0160] 40, 42, 43, 44, 45 47, 49 areas [0161] 46,48 zones [0162] 50 mark [0163] 60 stabilizing layer [0164] 70 replication varnish layer [0165] 80 primer layer [0166] 90 compensation layer [0167] 92 bonding layer