MULTILAYER BODY AND METHOD FOR PRODUCING A MULTILAYER BODY

Abstract

A multilayer body (1), in particular a laminate, and a method for producing a multilayer body (1). The multilayer body (1) includes a substrate (10), at least one decorative ply (30) and at least one protective ply (20). The at least one protective ply (20) has at least one adhesive layer (22) and at least one protective layer (21), wherein the at least one protective layer (21) includes or consists of paper, in particular transparent paper.

Claims

1. A multilayer body, comprising a substrate, at least one decorative ply and at least one protective ply, wherein the at least one protective ply has at least one protective layer and at least one adhesive layer, and wherein the at least one protective layer comprises or consists of paper.

2. The multilayer body according to claim 1, wherein the substrate comprises a material which is selected from the group which consists of paper, card and mixtures thereof.

3. The multilayer body according to claim 1, wherein the at least one protective layer has a transmittance of at least 50%.

4. The multilayer body according to one of the claim 1, wherein the at least one protective layer has an image sharpness value of from at least 0.5% to 10%.

5. The multilayer body according to claim 1, wherein the at least one protective layer has a grammage in the range of from 5 g/m.sub.2 to 300 g/m.sup.2.

6. The multilayer body according to claim 1, wherein, the at least one protective ply is applied register-accurately to the decorative ply.

7. The multilayer body according to claim 1, wherein the multilayer body has at least two protective plies wherein these differ.

8. The multilayer body according to claim 1, wherein the multilayer body has at least two protective plies which are present next to each other, viewed perpendicularly from the visible side.

9. The multilayer body according to claim 1, wherein the multilayer body has at least two protective plies, which are present one over another and/or overlapping at least in areas, viewed in a top view.

10. The multilayer body according to claim 1, wherein the at least one protective layer is dyed.

11. The multilayer body according to claim 1, wherein the at least one protective layer is not dyed and/or the pigmentation level of the at least one protective layer is less than 5%.

12. The multilayer body according to claim 1, wherein the at least one decorative ply is applied register-accurately to the substrate.

13. The multilayer body according to claim 1, wherein the at least one decorative ply comprises at least one primer layer.

14. (canceled)

15. The multilayer body according to claim 1, wherein the at least one decorative ply has at least one adhesive layer.

16. The multilayer body according to claim 15, wherein the at least one adhesive layer of the at least one decorative ply and/or the at least one adhesive layer of the at least one protective ply is formed of a hot glue and/or a thermoplastic adhesive and/or a cold glue and/or a radiation-curable adhesive.

17. The multilayer body according to claim 15, wherein the at least one adhesive layer of the at least one decorative ply and/or the at least one adhesive layer of the at least one protective ply has a non-volatile proportion in the range of from 5 wt.-% to 70 wt.%, relative to the total weight of all constituents of the respective adhesive layer.

18. The multilayer body according to claim 15, wherein the at least one adhesive layer of the at least one decorative ply and/or the at least one adhesive layer of the at least one protective ply comprises or consists of polyester resins.

19. The multilayer body according to claim 15, wherein the at least one adhesive layer of the at least one decorative ply and/or the at least one adhesive layer of the at least one protective ply has a thickness in the range of from 1 μm to 20 μm.

20. The multilayer body according to claim 15, wherein the at least one adhesive layer of the at least one decorative ply and/or the at least one adhesive layer of the at least one protective ply has a softening range in a range of between 40° C. and 180° C., further preferably between 60° C. and 140° C.

21. (canceled)

22. The multilayer body according to claim 1, wherein the substrate has a grammage in the range of from 50 g/m.sub.2 to 500 g/m.sub.2.

23. The multilayer body according to claim 1, wherein the substrate has a surface smoothness in the range of from 0.5 μm to 8.0 μm, measured using the Parker Print-Surf method, and/or a surface smoothness in the range of from 50 ml/min to 900 ml/min, measured using the Bendtsen method.

24. The multilayer body according to claim 1, wherein the substrate comprises at least one optical coat.

25. The multilayer body according to claim 24, wherein the at least one optical coat is dyed.

26. The multilayer body according to 24, wherein the at least one optical coat is colorless and/or is clearly transparent and/or in that the pigmentation level of the at least one optical coat is less than 5%.

27. The multilayer body according to claim 24, wherein the at least one optical coat has a gloss value of more than 50 GU.

28. The multilayer body according to claim 1, wherein the at least one decorative ply has at least one protective varnish layer.

29. The multilayer body according to claim 1, wherein the multilayer body has at least two decorative plies.

30. The multilayer body according to claim 1, wherein at least two, decorative plies are present next to each other.

31. The multilayer body according to claim 1, wherein at least two decorative plies are present at least partially one over another and/or overlapping.

32. The multilayer body according to claim 1, wherein the at least one decorative ply has at least one decorative layer.

33. (canceled)

34. The multilayer body according to claim 32, wherein the at least one decorative layer has a gloss value of 100 GU or more.

35. The multilayer body according to claim 32, wherein the at least one decorative layer has at least one layer generating an optically variable effect.

36. The multilayer body according to claim 32, wherein the at least one decorative layer has at least one replication varnish layer with a surface structure molded into the at least one replication varnish layer.

37. The multilayer body according to claim 32, wherein the at least one decorative layer has at least one, preferably patterned, reflective layer.

38. The multilayer body according to claim 32, wherein the at least one decorative layer has at least one thin-film layer element for generating a color shift effect dependent on the viewing angle.

39. The multilayer body according to claim 32, wherein the at least one decorative layer is formed of a High Refractive Index material.

40. The multilayer body according to claim 32, wherein the at least one decorative layer has a transmissibility for UV radiation in the range of from 5% to 70.

41. The multilayer body according to claim 32, wherein the at least one decorative layer has at least one metallic layer and/or at least one dielectric layer.

42-43 (canceled)

44. The multilayer body according to claim 1, wherein the at least one decorative ply has at least one color layer.

45. The multilayer body according to claim 44, wherein the at least one color layer is dyed by means of dyes and/or pigments.

46. (canceled)

47. The multilayer body according to claim 44, wherein the at least one color layer is multilayered.

48. The multilayer body according to claim 44, wherein the at least one color layer is formed over the whole surface, viewed in a top view.

49. The multilayer body according to claim 44, wherein the at least one color layer has a transmittance of more than 10%.

50-54 (canceled)

55. The multilayer body according to claim 1, wherein the at least one protective ply forms the visible side of the multilayer body.

56-59. (canceled)

60. A method for producing a multilayer body wherein the method comprises the following steps: a) preparing a substrate provided with at least one decorative ply, b) preparing at least one protective ply, wherein the protective ply comprises at least one protective layer and at least one adhesive layer, wherein the at least one protective layer comprises or consists of paper, c) applying the at least one protective ply to the substrate provided with the at least one decorative ply.

61. The method for producing a multilayer body according to claim 60, wherein step a) further comprises the following steps: a1) preparing the substrate, a2) preparing the at least one decorative ply as a transfer ply of a transfer film, wherein the transfer film further comprises a carrier ply and the transfer ply, a3) applying the at least one decorative ply to the substrate in at least one partial area, a4) peeling off the carrier ply.

62. The method for producing a multilayer body according to claim 61, wherein the substrate prepared in step a) comprises at least one optical coat.

63. The method for producing a multilayer body according to claim 61, wherein the transfer film prepared in step a2) as a decorative ply has at least one detachment layer.

64. The method for producing a multilayer body according to claim 63, wherein the at least one detachment layer comprises a material or a combination of materials which is selected from the group waxes, silicones, polyurethanes and/or polymers.

65. (canceled)

66. The method for producing a multilayer body according to claim 63, wherein the at least one detachment layer is formed transparent or translucent or opaque and/or dyed or at least partially dyed and/or crystal clear.

67. The method for producing a multilayer body according to claim 61, wherein the application of the at least one decorative ply to the substrate is effected by means of one of the following methods: stamping or lamination.

68-71. (canceled)

Description

[0179] In the following, the invention is explained by way of example with reference to several embodiment examples utilizing the attached schematic drawings. The embodiment examples shown are therefore not to be understood as limitative.

[0180] FIG. 1 shows a sectional representation of a multilayer body.

[0181] FIG. 2 shows a further sectional representation of a multilayer body.

[0182] FIG. 3 shows a further sectional representation of a multilayer body.

[0183] FIG. 4 shows a further sectional representation of a multilayer body.

[0184] FIG. 5 shows a further sectional representation of a multilayer body.

[0185] FIG. 6 shows a further sectional representation of a multilayer body.

[0186] FIG. 7 shows a further sectional representation of a multilayer body.

[0187] FIG. 8 shows a further sectional representation of a multilayer body.

[0188] FIG. 9 shows a representation of a method for producing a multilayer body.

[0189] FIG. 10 shows a further representation of a method for producing a multilayer body.

[0190] FIGS. 11a to 11d show results of a cross-cut test for a classification of the cross-cut adhesion into characteristic values.

[0191] FIG. 1 shows a sectional representation of a multilayer body 1, in particular a laminate, preferably comprising a substrate 10, at least one decorative ply 30 and at least one protective ply 20. As shown in FIG. 1, the at least one protective ply 20 comprises at least one adhesive layer 22 and at least one protective layer 21, wherein the at least one protective layer 21 comprises or consists of paper, in particular transparent paper.

[0192] The production of the multilayer body shown in FIG. 1 is preferably effected according to the method shown in FIG. 9, wherein this comprises the following steps, which are in particular carried out in the following order: [0193] a) preparing a substrate 10 provided with at least one decorative ply 30, [0194] b) preparing at least one protective ply 20, wherein the protective ply 20 comprises at least one protective layer 21 and at least one adhesive layer 22, wherein the at least one protective layer 21 comprises or consists of paper, in particular transparent paper, [0195] c) applying the at least one protective ply 20 to the substrate 10 provided with the at least one decorative ply 30, in particular to obtain the multilayer body 1.

[0196] The substrate 10 preferably comprises a material which is selected from the group which consists of paper, card, cardboard, preferably paper, card, and further preferably coated graphic paper, uncoated graphic paper, coated paper for packaging, uncoated paper for packaging, coated card, uncoated card, and mixtures thereof.

[0197] In particular, it is advantageous if the substrate 10 is formed translucent or opaque and/or dyed or at least partially dyed.

[0198] The substrate 10 preferably has a grammage in the range of from 50 g/m.sub.2 to 500 g/m.sub.2.

[0199] The substrate 10 preferably has a surface smoothness in the range of from 0.5 μm to 8.0 μm, preferably in the range of from 1.0 μm to 3.0 μm, in particular measured using the Parker Print-Surf (PPS) method according to DIN ISO 8791-4:2008-05 (“Paper and board—Determination of roughness/smoothness (air leak methods)—Part 4: Print-surf method”, issue date: 2008-05), and/or a surface smoothness in the range of from 50 ml/min to 900 ml/min, preferably in the range of from 100 ml/min to 400 ml/min, in particular measured using the Bendtsen method according to DIN ISO 8791-2:2013-09 (“Paper and board—Determination of roughness/smoothness (air leak methods) Part 2: Bendtsen method”, issue date: 2013-09).

[0200] In this preferred embodiment, the at least one decorative ply 30 is preferably attached between the substrate 10 and the at least one protective ply 20.

[0201] As shown in FIG. 1, the decorative ply 30 has a decorative layer 31. In an alternative variant, not shown in FIG. 1, the decorative ply 30 has at least one protective varnish layer 33 and/or at least one decorative layer 31 and/or a functional layer and/or at least one primer layer 35 and/or at least one adhesive layer 32 and/or at least one color layer 34.

[0202] It is provided in particular that the decorative ply 30 has a thickness in the range of from 1.0 μm to 5 μm, in particular of from 1.0 μm to 2 μm.

[0203] It is provided in particular that the at least one decorative layer 31 of the at least one decorative ply 30 comprises at least one metallic layer and/or at least one dielectric layer.

[0204] The at least one decorative layer 31 preferably has a thickness in the range of from 8 nm to 1000 nm, preferably of from 8 nm to 200 nm, in particular preferably of from 10 nm to 100 nm.

[0205] It is provided in particular that the at least one metallic layer comprises a material or a combination of materials selected from: aluminum, silver, gold, copper, nickel, chromium, indium, tin and/or an alloy comprising at least two of these metals.

[0206] The at least one dielectric layer preferably comprises a material or a combination of materials selected from: metal oxide, polymer, varnish, HRI material, in particular MgO, TiO.sub.n, Al.sub.2O.sub.3, ZnO, ZnS and/or SiO.sub.n, wherein n preferably comprises the range of from 1 to 3.

[0207] It is provided in particular that the at least one decorative layer 31 is formed of an HRI material, preferably CdSe, CeTe, Ge, HfO.sub.2, PbTe, Si, Te, TiCl or ZnTe, which is in particular radiolucent at least for partial ranges of the spectrum in the UV range, in particular for the wavelength range of from 250 nm to 400 nm.

[0208] In particular, it is further possible for the at least one decorative layer 31 to have at least one layer generating an optically variable effect.

[0209] It is provided in particular that the at least one decorative layer 31 has at least one replication varnish layer with a surface structure molded into the at least one replication varnish layer, in particular wherein the surface structure molded into the at least one replication varnish layer is selected from: diffractive surface structure, refractive surface structure, lens structure, matte structure, blazed grating.

[0210] It has proved worthwhile if the at least one decorative layer 31 has a diffractive and/or refractive relief structure for generating optically variable effects and/or a macrostructure for generating three-dimensional effects or depth effects. Through diffractive and/or refractive relief structures, which are formed in particular in a transparent varnish layer or replication varnish layer, different optical effects, so-called optically variable effects, can be achieved depending on the viewing angle, such as holograms, three-dimensional representations with kinematic effect dependent on the viewing angle, etc.

[0211] In order in particular to improve the visibility of relief structures, these are usually arranged adjoining a strongly reflective metallic layer and/or dielectric HRI layer with a comparatively high to very high refractive index, in particular consisting of a metal oxide. Such a highly reflective layer is preferably formed over the whole surface or patterned.

[0212] Furthermore, it is also preferably provided that the at least one decorative layer 31 is designed with optically variable pigments, luminescent substances, magnetic or electrically conductive substances, a color layer, a thin-film stack with interference color effect dependent on the viewing angle, a liquid-crystal layer, or also a combination of above-named layers comprising metallic layers, dielectric layers etc.

[0213] The at least one decorative layer 31 preferably has at least one reflective layer, preferably designed patterned.

[0214] In particular, the at least one decorative layer 31 has at least one thin-film layer element for generating a color shift effect dependent on the viewing angle.

[0215] Furthermore, it is preferred that the at least one decorative layer 31 has a gloss value of 100 GU or more, further preferably of 250 GU or more, in particular at a measurement angle of 60°, under light, in particular light in the wavelength range of between 300 nm and 780 nm.

[0216] It is provided in particular that the at least one adhesive layer 22 of the at least one protective ply 20 covers the at least one decorative ply 30 at least partially or over the whole surface.

[0217] It is provided in particular that the at least one adhesive layer 22 of the at least one protective ply 20 comprises several adhesive layers which are different in terms of their chemical and/or physical properties.

[0218] It is preferably also possible for the at least one adhesive layer 22 of the at least one protective ply 20 to be formed of a hot glue and/or a thermoplastic adhesive and/or a cold glue and/or a radiation-curable adhesive, in particular an adhesive that can be cured by means of electromagnetic radiation and/or electron beam radiation and/or by means of UV radiation, and/or an oxidatively curing adhesive and/or a low-migration adhesive.

[0219] It is also preferred that the at least one adhesive layer 22 of the at least one protective ply 20 comprises or consists of polyester resins. For example, the protective ply 20 comprises one of the following polyester resins and/or combinations thereof: Danpol PES 800 (Danquinsa GmbH, Dettenhausen, Germany), Tego Addbond LTH (Evonik Industries AG, Essen, Germany), Vitel 3300B (Bostik GmbH, Borgholzhausen, Germany).

[0220] Further, it is preferred that the at least one adhesive layer 22 of the at least one protective ply 20 has a non-volatile proportion in the range of from 5 wt.-% to 70 wt.-%, preferably 10 wt.-% to 50 wt.-%, in particular in each case relative to the total weight of all constituents of the respective at least one adhesive layer, preferably directly after being deposited.

[0221] It is also preferred that the at least one adhesive layer 22 of the at least one protective ply 20 has a thickness in the range of from 1 μm to 20 μm, in particular of from 2 μm to 7 μm.

[0222] It possible in particular for the at least one adhesive layer 22 of the at least one protective ply 20 to have a softening range in a range of between 40° C. and 180° C., further preferably between 60° C. and 140° C.

[0223] It is also preferably provided that the at least one adhesive layer 22 of the at least one protective ply 20 is formed transparent or translucent or opaque and/or dyed or at least partially dyed and/or crystal clear.

[0224] The at least one protective ply 20 covers the at least one decorative ply 30 at least partially, in particular over the whole surface. The at least one protective ply 20 preferably forms the visible side of the multilayer body 1. This means that the at least one protective ply 20 forms the top ply in a top view. In other words, it is preferred that the at least one protective ply 20 is attached to the side of the at least one decorative ply 30 facing away from the substrate 11.

[0225] In the case of the multilayer body 1 shown in FIG. 1, the protective ply 20 covers the decorative ply 30 over the whole surface and further also forms the visible side of the multilayer body 1.

[0226] In particular, the at least one protective ply 20 here protects the at least one decorative ply 30 from chemical, physical and/or mechanical environmental influences.

[0227] It is preferred that the at least one protective ply 20 is applied register-accurately to the decorative ply 30.

[0228] It is provided that the at least one protective layer 21 has a grammage in the range of from 5 g/m.sub.2 to 300 g/m.sub.2, preferably in the range of from 20 g/m.sub.2 to 100 g/m.sub.2.

[0229] It is possible for the at least one protective layer 21 to be dyed, in particular for the at least one protective layer 21 to be dyed by means of dyes and/or pigments, wherein the pigmentation level of the at least one protective layer 21 is preferably less than 20%, preferably less than 15%, further preferably less than 10%.

[0230] Alternatively, it is also possible for the at least one protective layer 21 not to be dyed and/or the pigmentation level of the at least one protective layer 21 to be less than 5%.

[0231] It is preferred in particular that the ratio of the quantity of the light allowed to pass through by the protective layer 21 to the quantity of the incident light is at least 0.5, preferably 0.7, in particular in the case of a measurement according to DIN EN ISO 13468-1:2019-10 with an illuminant D65, preferably with compensation, has.

[0232] In other words, it is provided in particular that the at least one protective layer 21 has a transmittance of at least 50%, preferably at least 70%, in particular in the case of a measurement according to DIN EN ISO 13468-1:2019-10 with an illuminant D65, preferably with compensation.

[0233] Further, it is preferably provided that the at least one protective layer 21 has a haze value of at most 100%, preferably at most 90%, in particular in the case of a measurement according to DIN EN ISO 13468-1:2019-10 with an illuminant D65, preferably with compensation.

[0234] In other words, it is provided in particular that the at least one protective layer 21 diffusely scatters transmitted light, preferably of the illuminant D65, preferably with compensation, further preferably according to DIN EN ISO 13468-1:2019-10, and/or in particular deflects it by less than 20%, preferably by less than 10%, by scattering.

[0235] It is also possible for the at least one protective layer 21 to have an image sharpness value of from 0.5% to 10%, preferably of from 1% to 5%, in particular in the case of a measurement according to DIN EN ISO 13468-1:2019-10 with an illuminant D65, preferably with compensation.

[0236] For example, the substrate 10, as described in step a), can be a prepared approx. 20 cm×30 cm large piece of a sheet of paper, from Sappi (type: Magno Gloss Arctic White, 200 g/m.sub.2). The substrate 10 is decorated, using a flat stamp (brass stamp from Hinderer & Mühlich, dimensions 7 cm×10 cm) in a manual stamping machine (Gierlich P5000, temperature at the stamp 119° C.), with a decorative ply 30, for example a golden hot-stamping film (LUXOR MTS 220) as decorative layer 31.

[0237] According to step b), a protective ply 20 is further provided, which can for example comprise a transparent paper from Canson with a grammage in the range of from 40 g/m.sub.2 to 45 g/m.sub.2 as protective layer 21. A solvent-containing adhesive layer 22 made of for example Tego Addbond LTH, Vitel 3300B and Danpol PES 800 in methyl ethyl ketone is applied to the protective layer 21. The adhesive layer 22 here has in particular a non-volatile proportion of approx. 25 wt.-% with an application weight of 5 g/m.sub.2. The adhesive layer 22 is dried to constant weight under standard atmospheric conditions and preferably forms a closed layer on the transparent paper.

[0238] The protective ply 20, comprising the transparent paper coated with an adhesive layer 22, is then laminated to the substrate decorated with the stamping film, preferably over the whole surface, in a laminating method corresponding to step c). The coated transparent paper is then laid, with the adhesive layer 22, on the decorated substrate, with the result that the decorated surface area is covered, preferably completely, by the transparent paper with an overhang of in particular 3 cm on each side.

[0239] The lamination, preferably over the whole surface, of the transparent paper coated with an adhesive layer 22 to the substrate 10 provided with a decorative ply 30 is effected for example in the roll-off method with at least one of the following parameters, in particular with the following parameters:

speed: 1 m/min to 20 m/min, in particular 2 m/min to 10 m/min,
roller temperature: 60° C. to 180° C., in particular 80° C. to 140° C.,
roller pressure: 1 bar to 20 bar.

[0240] The multilayer body 1 shown in FIG. 1 is preferably used for posters, placards, decorative material, labels, packaging material, in particular packaging card, outer packaging, wrapping paper, book covers and/or envelopes.

[0241] FIG. 2 shows a sectional representation of a multilayer body 1 with the same structure as the multilayer body 1 according to FIG. 1, which has a substrate 10, at least one decorative ply 30 and at least one protective ply 20. Here, the decorative ply 30 further comprises for example, in addition to at least one decorative layer 31, at least one protective varnish layer 33 and at least one adhesive layer 32. The substrate 10 here comprises at least one optical coat 11.

[0242] In the case of the multilayer body 1 shown in FIG. 2, the at least one decorative ply is covered over the whole surface by the at least one protective ply 20. The protective ply furthermore also forms the visible side of the multilayer body 1.

[0243] The production of the multilayer body 1 according to FIG. 2 is preferably effected according to a method like the production of the multilayer body 1 according to FIG. 1, wherein the method as shown in FIG. 10 in particular has further steps.

[0244] In particular, step a) of the method shown in FIG. 10 further comprises the following steps, which are in particular carried out in the following order: [0245] a1) preparing the substrate 10, [0246] a2) preparing the at least one decorative ply 30 as a transfer ply of a transfer film, wherein the transfer film further comprises a carrier ply and the transfer ply, [0247] a3) applying the at least one decorative ply 30 to the substrate 10 in at least one partial area, [0248] a4) peeling off the carrier ply, in particular to obtain the substrate 10 provided with the at least one decorative ply 30.

[0249] It is further preferred that the substrate 10 provided with the at least one decorative ply 30 in step a4) corresponds to the substrate 10 prepared in step a).

[0250] In particular, it is preferred that the application of the at least one decorative ply 30 to the substrate 10 in at least one partial area according to step a3) and/or the application of the at least one protective ply to the substrate 10 provided with the at least one decorative ply 30 according to step c) is effected by means of one of the following methods: stamping, in particular hot stamping or cold stamping, or printing, in particular intaglio printing and/or screen printing and/or offset printing and/or inkjet printing and/or xerographic printing (laser print), or lamination, in particular hot lamination.

[0251] It is preferred that the at least one optical coat 11 is attached at least to the substrate side which faces the at least one decorative ply 30. Still further preferably, a further optical coat 11 is also attached to the substrate side which faces away from the at least one decorative ply 30.

[0252] The at least one optical coat 11 is preferably dyed, in particular by means of dyes and/or pigments, wherein the pigmentation level of the at least one optical coat 11 is preferably less than 50%, preferably less than 40%, further preferably less than 30%.

[0253] It is also possible for the at least one optical coat 11 to be colorless and/or to be clearly transparent and/or for the pigmentation level of the at least one optical coat 11 to be 0%.

[0254] Further, it is also possible for the at least one optical coat 11 to have a gloss value of more than 50 GU, preferably of more than 60 GU, preferably at a measurement angle of 60°, under light, in particular light in the wavelength range of between 300 nm and 780 nm.

[0255] The at least one protective varnish layer 33 preferably comprises a material or a combination of materials selected from: polymers, in particular acrylate copolymers, polyester copolymers, polystyrene copolymers, polycarbonate copolymers and/or SMA copolymers.

[0256] The at least one protective varnish layer 33 preferably has a thickness in the range of from 0.5 μm to 3 μm, in particular of from 0.8 μm to 1.3 μm.

[0257] Alternatively, the protective varnish layer 33 can act as a detachment layer. The force of detachment of the protective varnish layer 32 from the carrier ply preferably lies between 5 cN and 45 cN, further preferably between 10 cN and 30 cN.

[0258] It is preferably possible for the at least one protective varnish layer 32 to be formed transparent or translucent or opaque and/or dyed or at least partially dyed and/or crystal clear.

[0259] The protective varnish layer 33 in particular represents a protection from chemical, physical and/or mechanical stress of the at least one decorative ply on the substrate.

[0260] In particular, the at least one adhesive layer 32 of the at least one decorative ply 30 can have the features already listed for the at least one adhesive layer 22 of the protective ply 20.

[0261] It is further preferably provided that the at least one adhesive layer 22 covers the at least one decorative ply 30 from the top and/or bottom side at least partially or over the whole surface.

[0262] In a preferred embodiment, it is provided that the at least one adhesive layer 32 of the at least one decorative ply 30 and the at least one adhesive layer 22 of the at least one protective ply 20 are different in terms of their chemical and/or physical properties.

[0263] In order, in particular when a UV adhesive is used as cold glue, to achieve the desired high UV transmissibility of the at least one decorative ply also in the case of at least one decorative layer in the form of a metallic layer, it is particularly preferred if the metallic layer has merely a layer thickness in the range of from 8 nm to 60 nm, preferably in the range of from 10 nm to 30 nm.

[0264] Thus, a good visibility and decorative effect of the metallic layer in combination with a high transmissibility for UV radiation are achieved, wherein the at least one metallic layer preferably has an OD of 1.2.

[0265] In order to achieve a sufficient curing of a UV adhesive, it is provided in particular that the at least one decorative layer has a transmissibility for UV radiation, in particular for the wavelength range of from 250 nm to 400 nm, in the range of from 5% to 70%, in particular of from 10% to 40%.

[0266] For example, the substrate 10 of the embodiment example shown in FIG. 2 is an approx. 20 cm×30 cm large piece of a sheet of paper, from Sappi (type: Magno Gloss Arctic White, 200 g/m.sub.2), which is prepared as described in step a1). Further, an optical coat 11, which is dyed for example by means of dyes with a pigmentation level of 10%, with the result that the substrate 10 has a red color impression, is preferably applied to the substrate 10.

[0267] A transfer film, prepared according to step a2) and comprising a carrier ply and a decorative ply 30, is applied corresponding to step a3) to the substrate 10 by means of a flat stamp (brass stamp from Hinderer & Mühlich, dimensions 7 cm×10 cm) and a manual stamping machine (Gierlich P5000, temperature at the stamp 119° C.). The decorative ply 30 comprises for example a silver hot-stamping film (LUXOR MTS Alufin) as decorative layer 31, which lies between a protective varnish layer 33 and an adhesive layer 32. The protective varnish layer 33 adjoining the carrier ply is for example made of a transparent and 1 μm thick acrylate copolymer. The adhesive layer 32 of the decorative ply preferably comprises in particular polyester copolymers, acrylate copolymers, polyvinyl chlorides, chlorinated polyolefins, ketone-aldehyde resins, colophony resins, hydrocarbon resins, polyamide resins.

[0268] In particular, the carrier ply comprises a material or a combination of materials selected from: PET, PMMA, PC, PE, PVC, PS, ABS, PU, PBS, PLA, PAN and/or glass and/or paper and/or hybrid materials. The carrier ply is peeled off corresponding to step a4) after the substrate 10 has been decorated, wherein the protective varnish layer 33 acts as a detachment layer, with the result that the complete layer structure of the decorative ply 30 remains on the substrate 10. Thus, as in step a), a substrate 10 provided with a decorative ply 30 is obtained.

[0269] In an embodiment, the prepared transfer film further has at least one detachment layer.

[0270] The at least one detachment layer preferably comprises a material or a combination of materials selected from: waxes, silicones, polyurethanes and/or polymers, preferably acrylate copolymer, polyester copolymers, polystyrene copolymers, polycarbonate copolymers.

[0271] The at least one detachment layer of the at least one detachment layer preferably has a thickness in the range of from 0.01 μm to 0.50 μm.

[0272] In particular, it is advantageous if at least one detachment layer is formed transparent or translucent or opaque and/or dyed or at least partially dyed and/or crystal clear.

[0273] For example, a transparent paper from Canson with a grammage of 70 g/m.sub.2 is is prepared as protective layer 21 of the protective ply 20. Analogously to the protective ply 20 according to FIG. 1, an adhesive layer 22 is applied to the protective layer 21 and dried in such a way that it preferably forms a closed layer on the transparent paper. This preferably corresponds to step b) of the method according to FIG. 10.

[0274] Analogously to FIG. 1, the protective ply 20 is laminated, corresponding to step c), on the decorated substrate by means of a roll-off method preferably over the whole surface. The protective ply 20 protrudes beyond the decorative ply 30 in particular by 3 cm in every lateral direction.

[0275] A sectional representation of an embodiment variant of the multilayer body 1, as represented in FIG. 2, is described in FIG. 3, comprising a substrate 10, at least one decorative ply 30 and at least one protective ply 20. In addition, the at least one decorative ply 30 is present in an area 40a and is not present in another area 40b. The substrate 10 is preferably visible for an observer through the at least one protective ply 20 in a top view.

[0276] The at least one decorative ply 30 preferably comprises at least one adhesive layer 32, at least one decorative layer 31 and at least one protective varnish layer 33. In particular, the at least one decorative ply 30 has at least one color layer 34 which, as shown in FIG. 3, is in particular attached to the side of the at least one protective varnish layer 33 facing the protective ply 20. A glossy, dyed optical coat 11, which faces the decorative ply 30, is preferably applied to the substrate 10.

[0277] The at least one decorative ply 30 likewise has at least one or more primer layers 35, which can be different in terms of their chemical and/or physical properties, with the result that a sufficient adhesion to the layers adjoining the primer layer 35, in particular to an adjoining adhesive layer 32, is formed. Thus, it is possible for example to achieve a sufficient adhesion in the direction of the at least one decorative layer 31 on one side of the primer layer 35 and a sufficient adhesion in the direction of the at least one adhesive layer 32 on the other side of the primer layer 35.

[0278] It is preferably provided that the at least one primer layer 35 has a thickness in the range of from 0.1 μm to 2 μm, preferably of from 0.2 μm to 1 μm, further preferably of from 0.2 μm to 0.8 μm.

[0279] In particular, the at least one primer layer 35 is formed transparent or translucent or opaque and/or dyed or at least partially dyed and/or crystal clear.

[0280] It is further preferably provided that at least one primer layer 35 has a surface roughness in the range of from 100 nm to 200 nm, preferably of from 120 nm to nm.

[0281] At least one decorative layer 31 preferably has at least one, preferably patterned, reflective layer, further preferably designed in the form of a first item of information.

[0282] In particular, it is provided that the at least one color layer 34 is preferably shaped patterned, further preferably in the form of a second item of information. The second item of information can be identical to, in particular congruent with, the first item of information. The second item of information can alternatively be different from the first item of information.

[0283] By information is meant in particular the representation of one of the following design elements or a combination of the following design elements: alphanumeric character, character, symbol, microprint, image, motif, photo, logo, portrait, pictogram. Further, it possible for the information to be represented in the form of an endless pattern and/or a grid, in particular a periodic grid, aperiodic grid, random grid, amplitude-modulated grid, dot grid, line grid.

[0284] In particular, it is possible for the at least one color layer 34 to be an overprint. This means here that the at least one color layer 34 is applied as an overprint to the side of the at least one protective varnish layer 33 facing the protective ply 20. The color layer 34 is preferably applied as an overprint after the the further layers comprised by the decorative ply 30 have already been applied to the substrate 10.

[0285] Further, it is preferred that the at least one color layer 34 is dyed by means of dyes and/or pigments, wherein the pigmentation level of the at least one color layer 34 is preferably between 1% and 50%, preferably between 10% and 30%.

[0286] In particular, it is preferred that the at least one color layer 34 has a layer thickness of between 0.5 μm and 10 μm, preferably between 1 μm and 5 μm. It is further preferred that the at least one color layer 34 is deposited as a varnish and the preferred layer thickness is understood as the dry layer thickness.

[0287] It is particularly preferred that the at least one color layer 34 is multilayered, in particular that the at least one color layer 34 is formed of two or more partial layers, wherein the two or more partial layers preferably in each case have a layer thickness of between 0.1 μm and 2 μm, further preferably between 0.3 μm and 1 μm.

[0288] Furthermore, it is also possible for the at least one color layer 34 to be formed over the whole surface, in particular for the at least one color layer 34 to occupy the entire surface area of the at least one decorative ply 30 when viewed in a top view.

[0289] It is also preferred that the at least one color layer 34 has a transmittance of more than 10%, preferably of more than 25%, further preferably of more than 50%, still further preferably of more than 75%, furthermore still further preferably of more than 90%, in particular in the wavelength range of between 300 nm and 780 nm.

[0290] It is further preferably provided that the force of adhesion between the at least one color layer 34 and the at least one decorative ply 30 is at least 25 cN, preferably at least 30 cN.

[0291] In particular, it is also possible for at least one area 40a, 40b and/or all areas to be designed patterned, in particular in the form of at least one of the following design elements or a combination of the following design elements: alphanumeric character, character, symbol, microprint, image, photo, motif, logo, portrait, pictogram.

[0292] Further, it is also possible for at least one area 40a, 40b to be designed in the form of an endless pattern and/or grid, in particular a periodic grid, aperiodic grid, random grid, amplitude-modulated grid, dot grid, line grid.

[0293] For a further embodiment variant, a multilayer body 1 is represented in FIG. 4 in its sectional representation. Like the multilayer body 1 according to FIG. 2, this comprises in particular a substrate 10, comprising at least one optical coat 11, at least one decorative ply 30 and at least one protective ply 20.

[0294] Further, the decorated substrate preferably has in each case open areas in the substrate 10 and the at least one decorative ply 30. In other words, the decorated substrate is designed in such a way that there are areas 40c in which in each case the at least one decorative ply 30 and a substrate 10 are present and areas 40d in which in each case no decorative ply 30 and no substrate 10 are present. In the embodiment shown, see-through areas form in particular in the case of transparent protective plies 20 in a top view.

[0295] A further embodiment for a multilayer body 1 is shown in the sectional representation in FIG. 5. Here, an area 40e of the substrate 10, comprising at least one optical coat 11, is preferably decorated with the at least one decorative ply 30 and an area 40f of the substrate 10 is not decorated by the at least one decorative ply 30. Further, it is possible for at least one protective ply 20 to be applied in the area 40e and no protective ply 20 to be applied in the area 40f. Thus, the design of the substrate 10 is visible for an observer in a top view in area without being influenced by the at least one protective ply 20. In other words, the color and the gloss of the substrate 10 can be perceived for example without a soft-focus effect.

[0296] The embodiment variants of FIG. 6 and FIG. 7 in each case show a sectional representation of a further multilayer body 1 according to FIG. 2, wherein the multilayer body 1 has at least two protective plies 20a, 20b. The at least two protective plies 20a, 20b in each case comprise at least one protective ply 21a, 21b and at least one adhesive layer 22a, 22b.

[0297] The multilayer body of FIG. 6 further has areas 40g which are recognizable in a top view for the observer and in which at least one protective ply 20a preferably has different properties from at least one protective ply 20b in another area 40h. For example, the protective plies 20a, 20b can differ in particular by pigmentation level and/or type of pigments and/or transmittance and/or color and/or cloudiness and/or image sharpness and/or thickness. The at least two protective plies 20a, 20b have in particular in each case the preferred embodiments of the at least one protective ply 20 shown in FIG. 1. Further, it is conceivable that these areas 40g, 40h at least partially overlap.

[0298] The sectional representation of the multilayer body 1 according to FIG. 7 represents a supplement or alternative to this. In a top view, areas 40i in which at least one further protective ply 20b is preferably applied at least partially to at least one protective ply 20a are recognizable for the observer. In particular, no protective ply 20b is applied in the areas 40j recognizable for the observer, with the result that only the at least one protective ply 20a is visible there. Here too, as in FIG. 6, it is possible for the protective plies 20a, 20b to differ in terms of their properties and preferably to have the preferred embodiments of the at least one protective ply 20 shown in FIG. 1.

[0299] The appearance of the multilayer body 1 can be influenced thereby and for example a transition from a purely yellow area to a purely red area can be made possible, wherein an orange mixed color is visible in particular where the areas overlap. It is also provided to generate, through the overlapping of protective plies, areas which have a stronger soft-focus effect or a greater cloudiness than other areas arranged next to them.

[0300] A further embodiment variant of a multilayer body 1 according to FIG. 2 is shown in FIG. 8 using a schematic sectional representation. The multilayer body 1 here has a substrate 10, to which at least one decorative ply 30a is applied. Further, it is possible to apply at least one further decorative ply 30b to the at least one decorative ply 30a applied to the substrate 10 over the whole surface or at least partially.

[0301] For example, the at least one decorative ply 30a comprises at least one decorative layer 31a and at least one adhesive layer 32a and the at least one further decorative ply 30b comprises at least one decorative layer 31b, at least one adhesive layer 32b and at least one protective varnish layer 33.

[0302] At least one protective ply 20 is preferably applied as a sealing layer to the visible side of the multilayer body 1, preferably over the whole surface. It is possible for the at least one further decorative ply 30b to be designed in such a way that it is transmissible for at least partial ranges of the light spectrum visible to the human eye, in particular in the wavelength range of between 300 nm and 780 nm. Through this embodiment variant of the multilayer body 1, it is possible for the observer to recognize, in a top view onto the visible side of the multilayer body 1, areas 40l the optical appearance of which is influenced by the at least one decorative ply 30a in contact with the substrate 10 and areas 40k which are influenced by the at least one further decorative ply 30b.

[0303] Of course, the listed embodiment variants, in particular with respect to the layer structure of the multilayer body 1, can be combined with each other as desired and do not represent a limitation.

[0304] Schematic results of a test for determining the adhesion of a multilayer body 1, for example according to FIG. 1 to FIG. 8, are shown in top view in FIG. 11a to FIG. 11d.

[0305] The adhesion is preferably determined by means of a cross-cut test DIN EN ISO 2409:2013-06 and/or ASTM D3359-09. The resulting sectional image is preferably assessed visually and allocated a characteristic value. Characteristic values corresponding to the standard of between GT 0 or 5 B, stands for a good adhesion, and GT 5 or 0 B, for a poor adhesion, preferably result.

[0306] In the cross-cut tests represented in FIG. 11a to FIG. 11d, the adhesion decreases from FIG. 11a to FIG. 11d. No cross-cut tests are shown for the respectively highest and lowest characteristic value.

[0307] The multilayer body 1, for example according to FIG. 1 to FIG. 8, preferably has a characteristic value of GT 0 or 5 B.

LIST OF REFERENCE NUMBERS

[0308] 1 multilayer body [0309] 10 substrate [0310] 11 optical coat [0311] 20, 20a, 20b protective ply [0312] 21, 21a, 21b protective layer [0313] 22, 22a, 22b adhesive layer [0314] 30, 30a, 30b decorative ply [0315] 31, 31a, 31b decorative layer [0316] 32, 32a, 32b adhesive layer [0317] 33, 33b protective varnish layer [0318] 34 color layer [0319] 35 primer layer [0320] 40a, 40b, 40 areas [0321] 40d, 40e, 40f, [0322] 40g, 40h, 40i, [0323] 40j, 40k, 40l