PACKAGING, COVER FILM AND USE OF SAME

Abstract

A packaging comprising a plastic foil molded part and a cover foil, wherein the plastic foil molded part defines the front side of the packaging and the cover foil defines the back side of the packaging and the cover foil is based on a carrier substrate provided with a semitransparent function layer, wherein the semitransparent function layer is constituted such that the cover foil has a first, visually recognizable color upon viewing in incident light and has a second, visually recognizable color upon viewing in transmitted light.

Claims

1.-18. (canceled)

19. A packaging comprising a plastic foil molded part and a cover foil, wherein the plastic foil molded part defines the front side of the packaging and the cover foil defines the back side of the packaging and the cover foil is based on a carrier substrate provided with a semitransparent function layer, wherein the semitransparent function layer is constituted such that the cover foil has a first, visually recognizable color upon viewing in incident light and has a second, visually recognizable color upon viewing in transmitted light.

20. The packaging according to claim 19, wherein the packaging is constituted such that a packaged object, e.g. a tablet, is not recognizable upon viewing the back side of the packaging in incident light and is recognizable upon viewing the back side of the packaging in transmitted light in the form of a motif formed by the first, visually recognizable color and the second, visually recognizable color.

21. The packaging according to claim 19, wherein the semitransparent function layer has a multi-layer structure with two semitransparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers.

22. The packaging according to claim 21, wherein the two semitransparent metallic layers are formed independently of each other from a metal and the metal is respectively chosen from the group consisting of Al, Ag, Ni, Cr, Cu, Au and an alloy of one or several of the hereinabove mentioned elements and the dielectric layer is an SiO.sub.2 layer, a ZnO layer, an Al.sub.2O.sub.3 layer, a TiO.sub.2 layer, a layer made of a nitride or oxynitride of one of the elements Si, Zn, Al or Ti, or an MgF.sub.2 layer, or a nitrocellulose layer obtainable, e.g., by printing technology.

23. The packaging according to claim 22, wherein the two semitransparent metallic layers are chosen independently of each other from Al or Ag and the dielectric layer is an SiO.sub.2 layer.

24. The packaging according to claim 21, wherein the cover foil appears golden upon viewing in incident light and has a blue color tone upon viewing in transmitted light.

25. The packaging according to claim 19, wherein the semitransparent function layer is obtainable by printing technology by means of an effect pigment composition.

26. The packaging according to claim 19, wherein the cover foil additionally has an opaque layer, in particular a printed layer or a metallization, with gaps in the form of patterns, characters or a coding.

27. The packaging according to claim 19, wherein the plastic foil molded part is opaque, opaque-white or transparent and preferably is transparent.

28. The packaging according to claim 19, wherein the packaging is a blister, in particular a tablet packaging.

29. A use of a foil comprising a carrier substrate provided with a semitransparent function layer, wherein the semitransparent function layer is constituted such that the foil has a first, visually recognizable color upon viewing in incident light and has a second, visually recognizable color upon viewing in transmitted light, as a cover foil of a packaging, in particular of a blister, further in particular of a tablet packaging.

30. The use according to claim 29, wherein the semitransparent function layer has a multi-layer structure with two semitransparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers.

31. The use according to claim 29, wherein the semitransparent function layer is obtainable by printing technology by means of an effect pigment composition.

32. The use according to claim 29, wherein the foil additionally has an opaque layer, in particular a printed layer or a metallization, with gaps in the form of patterns, characters or a coding.

33. A cover foil suitable for covering a blister, in particular a tablet packaging, comprising a carrier substrate provided with a semitransparent function layer, wherein the semitransparent function layer is constituted such that the foil has a first, visually recognizable color upon viewing in incident light and has a second, visually recognizable color upon viewing in transmitted light.

34. The cover foil according to claim 33, wherein the semitransparent function layer has a multi-layer structure with two semitransparent metallic layers and a dielectric layer arranged between the two semitransparent metallic layers.

35. The cover foil according to claim 33, wherein the semitransparent function layer is obtainable by printing technology by means of an effect pigment composition.

36. The cover foil according to claim 33, wherein the foil additionally has an opaque layer, in particular a printed layer or a metallization, with gaps in the form of patterns, characters or a coding.

Description

[0115] There are shown:

[0116] FIGS. 1 to 4 a packaging of the invention according to a first embodiment example;

[0117] FIGS. 5 to 8 a packaging of the invention according to a second embodiment example;

[0118] FIGS. 9 to 13 a packaging of the invention according to a third embodiment example;

[0119] FIGS. 14 to 18 a packaging of the invention according to a fourth embodiment example.

[0120] FIGS. 1 to 4 illustrate the mode of function of a packaging of the invention according to a first embodiment example. The packaging in the present example is described with reference to a tablet packaging.

[0121] FIG. 1 shows a tablet packaging 1 which comprises an opaque-white plastic foil molded part 2, e.g. manufactured from PVC, and a cover foil 3. The block arrow 4 symbolizes the viewing of the tablet packaging 1 from the front side, the block arrow 5 symbolizes the viewing of the tablet packaging 1 from the back side. The cover foil 3 has the following structure: [0122] primer layer (directed toward the viewer); [0123] carrier substrate (polypropylene); [0124] semitransparent function layer (20 nm Ag/240 nm SiO.sub.2/20 nm Ag) with gold/blue color change in incident light/transmitted light viewing; [0125] heat seal lacquer priming; [0126] heat seal lacquer (directed to the plastic foil molded part 2).

[0127] FIG. 2 shows the front side of the tablet packaging 1. The viewer perceives the opaque-white plastic foil molded part 2 in a uniform, white color. With the reference sign 6 the bubbles (or cavities or depressions) are indicated in dashed form in the plastic foil molded part 2. With the reference sign 7 present perforations, if any, are represented. From the tablet packaging 1 there were already taken out nine tablets by the consumer. Consequently, there are only three tablets left, which are present in the cavities 8, 9 and 10 and are not visible to the viewer because of the opaque-white plastic foil molded part 2.

[0128] In the shown example, the cover foil 3 in the region of the removed tablets is partially severed, but is substantially still present.

[0129] FIG. 3 shows the back side of the tablet packaging 1 (i.e. the cover foil 3) upon viewing in incident light. The viewer perceives the cover foil 3 in the form of a homogeneous, golden metallization.

[0130] FIG. 4 shows the back side of the tablet packaging 1 (i.e. the cover foil 3) upon viewing in transmitted light. The viewer perceives the three still present tablets in the cavities 8, 9 and 10 three-dimensionally in a dark gold. The remaining part of the cover foil 3 appears to the viewer in a bright gold which has a bluish color portion.

[0131] FIGS. 5 to 8 illustrate the mode of function of a packaging of the invention according to a second embodiment example. The packaging in the present example is described with reference to a tablet packaging.

[0132] FIG. 5 shows a tablet packaging 11 which comprises a transparent plastic foil molded part 12 and a cover foil 13. The block arrow 14 symbolizes the viewing of the tablet packaging 11 from the front side, the block arrow 15 symbolizes the viewing of the tablet packaging 11 from the back side. The cover foil 13 has the following structure: [0133] primer layer (directed toward the viewer); [0134] carrier substrate (polypropylene); [0135] semitransparent function layer (20 nm Ag/240 nm SiO.sub.2/20 nm Ag) with gold/blue color change in incident light/transmitted light viewing; [0136] heat seal lacquer priming; [0137] heat seal lacquer (directed to the plastic foil molded part 12).

[0138] FIG. 6 shows the front side of the tablet packaging 11. The viewer sees the three tablets 16, 17 and 18 still present in the tablet packaging. All the other tablets were already removed from the tablet packaging by the consumer, and although the cover foil 13 in the region of the removed tablets is severed, it is substantially still present. The viewer perceives the cover foil 13 through the transparent plastic foil molded part 12 as a background for the tablets 16, 17 and 18 in the form of a homogeneous, golden metallization.

[0139] FIG. 7 shows the back side of the tablet packaging 11 (i.e. the cover foil 13) upon viewing in incident light. The viewer perceives the cover foil 13 in the form of a homogeneous, golden metallization.

[0140] FIG. 8 shows the back side of the tablet packaging 11 (i.e. the cover foil 13) upon viewing in transmitted light. The viewer perceives the three still present tablets 16, 17 and 18 three-dimensionally golden-metallic. The remaining part of the cover foil 13 appears to the viewer in a bright blue, the shaping and the cavities of the plastic foil molded part 12 being readily recognizable three-dimensionally.

[0141] FIGS. 9 to 13 illustrate the mode of function of a packaging of the invention according to a third embodiment example. The packaging in the present example is described with reference to a tablet packaging.

[0142] FIG. 9 shows a tablet packaging 19 which comprises a transparent plastic foil molded part 20 and a cover foil 21. The block arrow 22 symbolizes the viewing of the tablet packaging 19 from the front side, the block arrow 23 symbolizes the viewing of the tablet packaging 19 from the back side. The cover foil 21 has the following structure: [0143] primer layer (directed toward the viewer); [0144] opaque, golden metallization with gaps (see the metallization 27 with gaps in the form of the cavities contained in the plastic foil molded part 20, shown in FIG. 11); [0145] carrier substrate (polypropylene); [0146] semitransparent function layer (20 nm Ag/240 nm SiO.sub.2/20 nm Ag) with gold/blue color change in incident light/transmitted light viewing; [0147] heat seal lacquer priming; [0148] heat seal lacquer (directed to the plastic foil molded part 20).

[0149] FIG. 10 shows the front side of the tablet packaging 19. The viewer sees the three tablets 24, 25 and 26 still present in the tablet packaging. All the other tablets were already removed from the tablet packaging by the consumer, and although the cover foil 21 in the region of the removed tablets is severed, it is substantially still present. The viewer perceives the cover foil 21 through the transparent plastic foil molded part 20 as a background for the tablets 24, 25 and 26 in the form of a homogeneous, golden metallization.

[0150] FIG. 12 shows the back side of the tablet packaging 19 (i.e. the cover foil 21) upon viewing in incident light. The viewer perceives the cover foil 21 in the form of a homogeneous, golden metallization.

[0151] FIG. 13 shows the back side of the tablet packaging 19 (i.e. the cover foil 21) upon viewing in transmitted light. As a result of the additional presence of the opaque, golden metallization 27 according to FIG. 11 within the layer structure of the cover foil 21, the viewer perceives merely the region of the tablet packaging 19 where tablets were already removed in a bright blue, the shaping and the cavities of the plastic foil molded part 20 being readily three-dimensionally recognizable. The rest of the cover foil 21 appears to the viewer homogeneously in the form of a golden, metallic area.

[0152] FIGS. 14 to 18 illustrate the mode of function of a packaging of the invention according to a fourth embodiment example. The packaging in the present example is described with reference to a tablet packaging.

[0153] FIG. 14 shows a tablet packaging 28 which comprises a transparent plastic foil molded part 29 and a cover foil 30. The block arrow 32 symbolizes the viewing of the tablet packaging 28 from the front side, the block arrow 33 symbolizes the viewing of the tablet packaging 28 from the back side. The cover foil 30 has the following structure: [0154] primer layer (directed toward the viewer); [0155] opaque, golden metallization with gaps (so-called negative writing; see the metallization 37 with gaps in the form of capitals TEXTTEXTTEXTTEXT, shown in FIG. 16); [0156] carrier substrate (polypropylene); [0157] semitransparent function layer (20 nm Ag/240 nm SiO.sub.2/20 nm Ag) with gold/blue color change in incident light/transmitted light viewing; [0158] heat seal lacquer priming; [0159] heat seal lacquer (directed to the plastic foil molded part 29).

[0160] FIG. 15 shows the front side of the tablet packaging 28. The viewer sees the three tablets 34, 35 and 36 still present in the tablet packaging. All the other tablets were already removed from the tablet packaging by the consumer, and although the cover foil 30 in the region of the removed tablets is severed, it is substantially still present. The viewer perceives the cover foil 30 through the transparent plastic foil molded part 29 as a background for the tablets 34, 35 and 36 in the form of a homogeneous, golden metallization.

[0161] FIG. 17 shows the back side of the tablet packaging 28 (i.e. the cover foil 30) upon viewing in incident light. The viewer perceives the cover foil 30 in the form of a homogeneous, golden metallization.

[0162] FIG. 18 shows the back side of the tablet packaging 28 (i.e. the cover foil 30) upon viewing in transmitted light. As a result of the additional presence of the opaque, golden metallization 37 with gaps (so-called negative writing) according to FIG. 16 within the layer structure of the cover foil 30, the viewer perceives merely the region of the tablet packaging 28 where tablets were already removed in a bright blue in the shape of the letters EX. The rest of the cover foil 30 appears to the viewer homogeneously in the form of a golden, metallic area.

[0163] A fifth embodiment example (not shown in the Figures) is based on the above second embodiment example. The cover foil with gold/blue color change upon incident light/transmitted light viewing has the following structure: [0164] primer layer (directed toward the viewer); [0165] yellow colored, silver mirror layer obtainable by means of yellow colored metal pigments which are known from WO 2005/051675 A2 (the metal pigments are based on a metal which is chosen preferably from the group consisting of aluminum, stainless steel, nichrome, gold, silver, platinum and copper; the metal is in particular preferably aluminum, the average particle diameter being preferably in a range of 8 to 15 m, further preferably in a range of 9 to 10 m, measured with a Coulter LS130 laser diffraction granulometer; such a printing ink enables the supply of a silver mirror layer); [0166] carrier substrate (polypropylene); [0167] blue color layer; [0168] yellow colored, silver mirror layer obtainable by means of yellow colored metal pigments which are known from WO 2005/051675 A2; [0169] heat seal lacquer priming; [0170] heat seal lacquer (directed to the plastic foil molded part).

[0171] A sixth embodiment example (not shown in the Figures) is based on the above second embodiment example. The cover foil with gold/blue color change upon incident light/transmitted light viewing has the following structure: [0172] primer layer (directed toward the viewer); [0173] yellow color layer; [0174] semitransparent metallic layer, e.g., Al; [0175] carrier substrate (polypropylene); [0176] blue color layer; [0177] semitransparent metallic layer, e.g., Al; [0178] yellow color layer; [0179] heat seal lacquer priming; [0180] heat seal lacquer (directed to the plastic foil molded part).

[0181] A seventh embodiment example (not shown in the Figures) is based on the above second embodiment example. The cover foil with gold/blue color change upon incident light/transmitted light viewing has the following structure: [0182] primer layer (directed toward the viewer); [0183] carrier substrate (polypropylene); [0184] semitransparent function layer (e.g., Ag/SiO.sub.2/Ag structure or Al/SiO.sub.2/Al structure) with gold/blue color change in incident light/transmitted light viewing; [0185] heat seal lacquer priming; [0186] heat seal lacquer (directed to the plastic foil molded part).

[0187] The above cover foil was applied by means of hot sealing onto a plastic foil molded part in whose little cells tablets were contained, in order to produce a tablet packaging in this manner. Into the cover foil of the tablet packaging there was subsequently incorporated a two-dimensional bar code by irradiation by means of a Nd:YAG laser. The laser radiation effects here a change of the semitransparent function layer (probably an ablation or evaporization of the metal), so that in the semitransparent function layer there is produced a transparent marking in the form of a two-dimensional bar code visible to the viewer in incident light as well as in transmitted light.

[0188] The primer layer used in the above embodiment examples can be in particular an ink-receiving layer which is suitable for being printed with printing ink. In this manner, the printability of the cover foil with writing (e.g. manufacturer and trade name of a drug) can be further improved.

[0189] The heat seal lacquer priming used in the above embodiment examples is optional.

[0190] The carrier substrate on a polypropylene basis used in the above embodiment examples may contain inorganic fillers to improve the push-through property of the cover foil. However, the carrier substrate may also be based on other materials, e.g., on cycloolefin copolymer (COC) or cycloolefin polymer (COP), or on films which contain at least one layer of cycloolefin copolymer (COC) or cycloolefin polymer (COP), e.g., films with the structure COC/PE/COC or COC/PP/COC or COC/PE-LLD/COC or a film with a COC core layer (e.g., the following layer sequence: polymeric thermal protection layer (preferably chosen from COC, COP, PP, PA or PET)COC core layerpolymeric heat seal layer), described in WO 2009/000403 A1 or in WO 2010/139409 A1. A cover foil with excellent transparency, capability of being pushed through and capability of being metallized is based, e.g., on a carrier substrate which is 30 m thick and has a layer structure COC/PP/COC, wherein as a COC material there is used, given its high stiffness, in particular the commercial type TOPAS 6013F-04.