REFINED PRODUCT

Abstract

The present invention relates to a refined product comprising a substrate having a pattern of a lacquer layer, and a hot stamping foil layer located on the lacquer layer, the lacquer layer having been obtained by inkjet printing from an aqueous lacquer composition comprising a binder composition comprising a polyacrylate and a polyurethane, at least one humectant, and water, the lacquer composition having a binder solids content of at least 20% by weight, preferably at least 30% by weight, based on the total weight of the lacquer composition. The present invention further relates to a process for producing said refined product.

Claims

1-14. (canceled)

15. A refined product comprising a substrate having a pattern of a lacquer layer, and a hot stamping foil layer located on the lacquer layer, wherein the lacquer layer has been obtained by inkjet printing from an aqueous lacquer composition comprising a binder composition comprising a polyacrylate and a polyurethane, at least one humectant, and water, the lacquer composition having a binder solids content of at least 20% by weight based on the total weight of the lacquer composition.

16. The refined product according to claim 15, wherein the hot stamping foil layer is a layer selected from the group consisting of gold, silver, copper and aluminum hot stamping foil layers.

17. The refined product according to claim 15, wherein the lacquer composition comprises 50 to 85% by weight of the binder composition, based on the total weight of the lacquer composition.

18. The refined product according to claim 15, wherein the binder composition is a combination of a polystyrene acrylate and a polyester polyurethane or a polycarbonate polyurethane.

19. The refined product according claim 15, wherein the lacquer composition comprises from 5 to 20% by weight of the at least one humectant, based on the total weight of the lacquer composition.

20. The refined product according to claim 15, wherein the humectant is selected from the group consisting of polyols and combinations thereof.

21. The refined product according to claim 20, wherein the humectant is a combination of 1,3-butanediol, butyl diglycol and glycerol.

22. The refined product according to claim 15, wherein the lacquer composition comprises 0.1 to 10% by weight of further additives, based on the total weight of the lacquer composition.

23. A process for producing a refined product according to claim 15, comprising the steps of: a) applying an aqueous lacquer composition according to in an inkjet process, wherein said aqueous lacquer composition comprises a binder composition comprising a polyacrylate and a polyurethane, at least one humectant, and water, the lacquer composition having a binder solids content of at least 20% by weight based on the total weight of the lacquer composition; and b) performing a hot stamping foil process.

24. The process according to claim 23, wherein the inkjet process is a DOD inkjet process.

25. The process according to claim 23, wherein in step a) the lacquer composition is applied to a substrate and in step b) a hot stamping foil is applied by a hot stamping foil process to the substrate printed with the lacquer composition.

26. The process according to claim 23, wherein in step a) the lacquer composition is applied to a hot stamping foil and in step b) the hot stamping foil printed with the lacquer composition is applied to the substrate by a hot stamping foil process.

27. The process according to claim 23, wherein the inkjet process in step a) is a single-pass printing process.

28. The process according to claim 23, wherein the inkjet process in step a) is carried out with at least one recirculation head with piezoelectric elements.

29. The process according to claim 23, wherein the substrate is an unprinted substrate, a substrate having an ink-receiving layer, a substrate printed in a gravure printing process, a substrate printed in a flexographic printing process, a substrate printed in an inkjet printing process, a substrate printed in an offset printing process, or a hot stamping foil.

30. The process according to claim 23, wherein in step a) a layer of the aqueous lacquer composition is applied in an amount ranging from 6 to 200 g/m.sup.2 so as to obtain a layer having a thickness in the dried state ranging from 1 to 50 μm.

Description

[0079] The present invention is explained in more detail below with reference to non-limiting examples and drawings. There is shown:

[0080] FIG. 1a-1c various samples which were produced according to the invention.

[0081] FIG. 2 a section of a two-dimensional pattern magnified 20 times.

[0082] FIG. 3 a section of a pattern magnified 50 times.

EXAMPLE 1

[0083] An aqueous lacquer composition was prepared from the formulation described in Table 1 by mixing the individual components with stirring.

TABLE-US-00001 TABLE 1 Component Amount (wt.-%) Water 8.200 Monoethanolamine 0.100 1,3-Butanediol 6.000 Metolate 288 1.300 Butyl diglycol 1.000 Glycerol 5.400 Macrovil PAC 1445 63.000 Takelac W-6355 15.000

[0084] Makrovil PAC 1445 is an aqueous polystyrene-acrylate dispersion with a solids content of 40%.

[0085] Takelac W-6355 is an aqueous polycarbonate polyurethane dispersion with a solids content of 35%.

[0086] The resulting aqueous lacquer composition had a binder solids content of 30.5 wt %, a viscosity of 10 mPas (at 25° C.) and a surface tension of 30 mN/m (at 25° C.)

EXAMPLE 2

[0087] An aqueous lacquer composition was prepared from the formulation described in Table 2 by mixing the individual components with stirring.

TABLE-US-00002 TABLE 2 Component Amount (wt.-%) Water 8.200 Monoethanolamine 0.100 1,3-Butanediol 5.000 Metolate 288 1.200 Butyl diglycol 1.000 Glycerol 4.000 Macrovil PAC 1445 62.000 Esacote PU 40 18.500

[0088] Makrovil PAC 1445 is an aqueous polystyrene-acrylate dispersion with a solids content of 40%.

[0089] Esacote PU 40 is an aqueous polyester-polyurethane dispersion with a solids content of 35%.

[0090] The resulting aqueous lacquer composition had a binder solids content of 31 wt %, a viscosity of 9 mPas (at 25° C.) and a surface tension of 30 mN/m (at 25° C.)

EXAMPLE 3

[0091] The aqueous lacquer composition according to Example 1 was printed in a DOD inkjet process with a Ricoh recirculation head on Invercote G (240 g/m.sup.2) as substrate. In a single pass process, a layer with an application quantity of 9 g/m.sup.2 and a corresponding layer thickness of 3 μm could be printed. The layer thus produced was not sticky, did not block and showed a high gloss.

EXAMPLE 4

[0092] A hot stamping foil from Kurz (Alufin® GMD) was applied to the printed substrate according to example 3 on a rotary stamping machine at a roll temperature of 80-160° C. (preferably 100-130° C.), a roll pressure of 7-18 N/mm (preferably 10-15 N/mm) and at a speed of 10-100 m/min (preferably 30-50 m/min).

[0093] Different patterns were produced, which are shown in FIG. 1a-1c. These patterns are characterized by high precision and resolution.

[0094] FIG. 2 shows a section of a sample magnified 20 times. FIG. 2 illustrates the possibility of also foiling surfaces according to the invention.

[0095] FIG. 3 shows a section of a pattern magnified 50 times. The line in the upper left of FIG. 3 is exactly 1 pixel wide and illustrates the extraordinarily good resolution that can be obtained according to the invention.