Hologram laminate

Abstract

To provide a hologram laminate which offers superior anti-counterfeiting effect and designability, in view of the fact that a volume hologram can be easily reproduced using the volume hologram as an original by bringing a photosensitive material for reproduction into tight contact with the volume hologram and irradiating the same with laser light from a side of the photosensitive material.SOLUTION: A hologram laminate 10 is provided, comprising a volume hologram layer 3 and a metal layer 6 disposed on one surface of the volume hologram layer and provided with a patterned light transmissive portion and a light reflective portion.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to holographic laminates. [Background technology]

[0002] A hologram is created by interfering two beams of light with the same wavelengths (object beam and reference beam) and recording the wavefront of the object beam as interference fringes on a photosensitive material. When this hologram is irradiated with light of the same conditions as the reference beam used to record the interference fringes, a diffraction phenomenon occurs due to the interference fringes, and a wavefront identical to the original object beam can be reproduced. Holograms have the advantages of being beautiful in appearance and relatively difficult to copy, and are therefore often used for security purposes.

[0003] Holograms can be classified into several types depending on the recording format of the interference fringes, but are typically divided into relief holograms and volume holograms. A relief hologram is a hologram in which a fine uneven pattern is formed on the surface of the hologram layer. On the other hand, a volume hologram is a hologram in which interference fringes caused by the interference of light are recorded three-dimensionally in the thickness direction as fringes with different refractive indexes. Since an image is recorded in a volume hologram due to the difference in refractive index of the material, it is more difficult to replicate than a relief hologram.

[0004] Volume holograms can be mass-produced industrially using a hologram master plate. Therefore, it is possible to replicate the volume hologram by using the volume hologram itself as the master plate, attaching a photosensitive material for replication to the volume hologram, and irradiating a laser from the photosensitive material side.

[0005] Therefore, there is a demand for holograms that have excellent anti-counterfeiting properties.

[0006] For example, Patent Documents 1 and 2 disclose a hologram laminate in which a volume hologram and a relief hologram are laminated to enhance the anti-counterfeiting effect.

[0007] However, in recent years, technology for easily duplicating holograms has become widespread, and it has been pointed out that simply using holograms is not sufficient as a means of preventing counterfeiting. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Publication No. 6-118864 [Patent Document 2] JP 2002-278434 A Summary of the Invention [Problem to be solved by the invention]

[0009] The present disclosure has been made in consideration of the above-mentioned circumstances, and has as its main object to provide a hologram laminate that is excellent in anti-counterfeiting effect and designability. [Means for solving the problem]

[0010] One embodiment of the present disclosure provides a hologram laminate having a volume hologram layer and a metal layer disposed on one surface of the volume hologram layer and having patterned light-transmitting portions and light-reflecting portions.

[0011] The hologram laminate of the present embodiment preferably has a relief hologram layer on the surface of the metal layer opposite to the volume hologram layer, and in this case, the metal layer is preferably disposed on the relief hologram layer's concave-convex side.

[0012] Furthermore, the hologram laminate of this embodiment may have, on the surface of the volume hologram layer opposite the metal layer, an adhesive layer, a laser coloring layer having a patterned coloring portion, and a support, in that order from the volume hologram layer side.

[0013] Another embodiment of the present disclosure provides a hologram laminate having a relief hologram layer and a metal layer disposed on one surface of the relief hologram layer and having dot-shaped light-transmitting portions and light-reflecting portions.

[0014] Another embodiment of the present disclosure provides a hologram laminate having a relief hologram layer and a metal layer disposed on one surface of the relief hologram layer and having a pattern of light semi-transmitting portions and light reflective portions.

[0015] The hologram laminate of this embodiment preferably has a volume hologram layer on the surface of the metal layer opposite to the relief hologram layer.

[0016] Another embodiment of the present disclosure provides a card having the holographic laminate described above.

[0017] Another embodiment of the present disclosure provides a hologram transfer foil having the hologram laminate described above.

[0018] Another embodiment of the present disclosure provides a holographic label having the above-mentioned holographic laminate.

[0019] Another embodiment of the present disclosure provides a data page having the hologram stack described above.

[0020] Another embodiment of the present disclosure provides a booklet comprising the data pages described above. Effect of the Invention

[0021] The present disclosure can provide a hologram laminate that is excellent in anti-counterfeiting effect and designability, and also allows variable information to be imparted. [Brief description of the drawings]

[0022] [Figure 1] 1 is a schematic cross-sectional view illustrating a hologram laminate according to the present disclosure. [Diagram 2]1A and 1B are schematic cross-sectional and plan views illustrating a hologram laminate according to the present disclosure. [Diagram 3] 1A and 1B are schematic cross-sectional and plan views illustrating a hologram laminate according to the present disclosure. [Figure 4] 1 is a schematic cross-sectional view illustrating a hologram laminate according to the present disclosure. [Diagram 5] 1A and 1B are schematic cross-sectional and plan views illustrating a hologram laminate according to the present disclosure. [Figure 6] 1A and 1B are schematic cross-sectional and plan views illustrating a hologram laminate according to the present disclosure. [Figure 7] 1A and 1B are schematic cross-sectional and plan views illustrating a hologram laminate according to the present disclosure. [Figure 8] 1 is a schematic cross-sectional view illustrating a hologram laminate according to the present disclosure. [Figure 9] 1 is a schematic cross-sectional view illustrating a hologram laminate according to the present disclosure. [Figure 10] 1 is a schematic cross-sectional view illustrating a hologram laminate according to the present disclosure. [Figure 11] 1 is a schematic cross-sectional view illustrating a hologram laminate according to the present disclosure. [Figure 12] 1A and 1B are schematic cross-sectional and plan views illustrating a hologram laminate according to the present disclosure. [Figure 13] 1A and 1B are schematic cross-sectional and plan views illustrating a hologram laminate according to the present disclosure. [Figure 14] 1 is a schematic cross-sectional view illustrating a hologram laminate according to the present disclosure. [Figure 15] 1A and 1B are schematic cross-sectional and plan views illustrating a hologram laminate according to the present disclosure. [Figure 16] 1A and 1B are schematic cross-sectional and plan views illustrating a hologram laminate according to the present disclosure. [Figure 17] 1A and 1B are schematic cross-sectional and plan views illustrating a hologram laminate according to the present disclosure. [Figure 18] 1 is a schematic cross-sectional view illustrating a hologram laminate according to the present disclosure. [Figure 19]1A and 1B are schematic cross-sectional and plan views illustrating a hologram laminate according to the present disclosure. [Figure 20] 1A and 1B are schematic cross-sectional and plan views illustrating a hologram laminate according to the present disclosure. [Figure 21] 1 is a schematic cross-sectional view illustrating a hologram laminate according to the present disclosure. [Figure 22] 1A and 1B are schematic cross-sectional and plan views illustrating a hologram laminate according to the present disclosure. [Figure 23] 1A and 1B are schematic cross-sectional and plan views illustrating a hologram laminate according to the present disclosure. [Figure 24] 1A and 1B are schematic cross-sectional and plan views illustrating a hologram laminate according to the present disclosure. [Diagram 25] 1 is a photograph of a hologram laminate of Example 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] The following describes the embodiments of the present disclosure with reference to the drawings. However, the present disclosure can be implemented in many different forms, and should not be interpreted as being limited to the description of the embodiments exemplified below. In addition, the drawings may be schematic in terms of the width, thickness, shape, etc. of each part compared to the actual form in order to make the explanation clearer, but these are merely examples and do not limit the interpretation of the present disclosure. In this specification and each figure, elements similar to those described above with respect to the previous figures may be given the same reference numerals, and detailed explanations may be omitted as appropriate.

[0024] In this specification, when describing a mode in which another component is disposed on a certain component, the term "above" or "below" is intended to include both a case in which another component is disposed directly above or below a certain component so as to be in contact with the component, and a case in which another component is disposed above or below a certain component with another component interposed therebetween, unless otherwise specified. Also, in this specification, when describing a mode in which another component is disposed on the surface of a certain component, the term "on the surface" is intended to include both a case in which another component is disposed directly above or below a certain component so as to be in contact with the component, and a case in which another component is disposed above or below a certain component with another component interposed therebetween, unless otherwise specified.

[0025] In this specification, the term "sheet" also includes a member called a "film." The term "film" also includes a member called a "sheet."

[0026] The hologram laminate according to the present disclosure, as well as cards, hologram transfer foils, hologram labels, data pages and booklets using the same, will be described in detail below.

[0027] A. Holographic Laminate The hologram laminate in the present disclosure has three embodiments, each of which will be described below.

[0028] I. First embodiment The hologram laminate of this embodiment has a volume hologram layer, and a metal layer disposed on one surface of the volume hologram layer and having patterned light-transmitting portions and light-reflecting portions.

[0029] The hologram laminate of this embodiment will be described with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing an example of the hologram laminate of this embodiment. As illustrated in FIG. 1, the hologram laminate 10 has a volume hologram layer 3 and a metal layer 6 arranged on one surface of the volume hologram layer 3 and having a patterned light-transmitting portion 6a and a light-reflecting portion 6b. The hologram laminate 10 may further have any layer as necessary, and in FIG. 1, a support 1, a first adhesive layer 2, a volume hologram layer 3, a first protective layer 4, a second adhesive layer 5, a metal layer 6, and a second substrate 7 are arranged in this order.

[0030] In this specification, the "pattern" in the patterned light-transmitting portion refers to characters, figures, symbols, or combinations of these, as described below. The figures include simple figures such as polygons, circles, ellipses, and stars, as well as stripes, lattices, designs, bar codes, and two-dimensional codes.

[0031] 2(a) and (b) are diagrams of the hologram laminate shown in FIG. 1 when observed, and FIG. 2(b) is a plan view of the hologram laminate 10 when observed from the surface of the second substrate 7 side in FIG. 2(a). As shown in FIG. 2(a) and (b), when a light source 22 is arranged on the observer 21 side and light is irradiated from the light source 22 to the hologram laminate 10 at an angle other than a predetermined angle, the metal layer 6 has a patterned light-transmitting portion 6a and a light-reflecting portion 6b, so that a predetermined pattern Ib due to the light-transmitting portion 6a can be observed due to the contrast of light brightness in the light-transmitting portion 6a and the light-reflecting portion 6b. Specifically, the metal layer 6 has a patterned light-transmitting portion 6a of the number "1", and when light is irradiated from the observer 21 side at an angle other than a predetermined angle, the pattern Ib of the number "1" due to the light-transmitting portion 6a of the metal layer 6 can be observed.

[0032] 3(a) and (b) are views of the hologram laminate shown in FIG. 1, and FIG. 3(b) is a plan view of the hologram laminate 10 as viewed from the surface of the second substrate 7 side in FIG. 3(a). As shown in FIG. 3(a), when a light source 22 is arranged on the observer 21 side and the hologram laminate 10 is irradiated with a reproduction illumination light from the light source 22 at a predetermined angle, an image is reproduced by the diffraction of light due to the interference fringes recorded in the volume hologram layer 3. At this time, the metal layer 6 has a pattern-shaped light transmitting portion 6a and a light reflecting portion 6b, and light can be transmitted through the light transmitting portion 6a. Therefore, as shown in FIG. 3(b), a predetermined pattern Ib due to the light transmitting portion 6a can be observed due to the contrast of light brightness at the light transmitting portion 6a and the light reflecting portion 6b of the metal layer 6, and an image Ia reproduced in the volume hologram layer 3 can be observed in the light transmitting portion 6a of the metal layer 6. Specifically, the metal layer 6 has light-transmitting portions 6a in the pattern of the number "1." When reproduction illumination light is irradiated at a predetermined angle from the observer 21 side, the pattern Ib of the number "1" formed by the light-transmitting portions 6a of the metal layer 6 can be observed, and the image Ia of a star reproduced in the volume hologram layer 3 can be observed in the light-transmitting portions 6a of the metal layer 6.

[0033] In this embodiment, the metal layer having a patterned light-transmitting portion and a light-reflecting portion is disposed, so that a predetermined pattern due to the light-transmitting portion of the metal layer can be observed at angles other than the predetermined angle, while a reproduced image of the volume hologram layer can be observed in the light-transmitting portion of the metal layer together with the predetermined pattern due to the light-transmitting portion of the metal layer at the predetermined angle. Therefore, the presence of the volume hologram layer can be made difficult to notice, and the counterfeit prevention effect can be improved. In addition, the design can be improved. Furthermore, when the light-transmitting portion is formed in the metal layer by laser irradiation, for example, the patterned light-transmitting portion can provide variable information such as a name, ID, serial number, barcode, two-dimensional code, etc., for each hologram laminate, and the hologram laminate can be used as a variable information recording medium.

[0034] FIG. 4 is a schematic cross-sectional view showing another example of the hologram laminate of this embodiment. As illustrated in FIG. 4, the hologram laminate 10 has a volume hologram layer 3 and a metal layer 6 arranged on one side of the volume hologram layer 3 and having a patterned light transmission part 6a and a light reflection part 6b, and a relief hologram layer 8 is arranged on the side of the metal layer 6 opposite to the volume hologram layer 3. The hologram laminate 10 may further have any layer as necessary, and in FIG. 4, a support 1, a first adhesive layer 2, a volume hologram layer 3, a first protective layer 4, a second adhesive layer 5, a metal layer 6, a relief hologram layer 8, and a second base material 7 are arranged in this order. The metal layer 6 is arranged on the surface of the relief hologram layer 8 on the concave-convex structure side, and can function as a reflective layer. In the metal layer 6, not only the light reflection part 6b but also the light transmission part 6a can function as a reflective layer.

[0035] 5(a) and (b) are views of the hologram laminate shown in FIG. 4, and FIG. 5(b) is a plan view of the hologram laminate 10 as viewed from the surface of the second substrate 7 side in FIG. 5(a). As shown in FIG. 5(a), when a light source 22 is disposed on the observer 21 side and the hologram laminate 10 is irradiated with a reconstruction illumination light from the light source 22 at an angle other than a predetermined angle, an image is reproduced by the diffraction of light due to the interference fringes recorded in the relief hologram layer 8. At this time, since the metal layer 6 has patterned light-transmitting portions 6a and light-reflecting portions 6b, as shown in FIG. 5(b), a predetermined pattern Ib due to the light-transmitting portions 6a can be observed due to the contrast of light brightness at the light-transmitting portions 6a and light-reflecting portions 6b of the metal layer 6, and an image Ic reproduced in the relief hologram layer 8 can be observed. Specifically, the metal layer 6 has a lattice-shaped light-transmitting portion 6a, and when reconstruction illumination light is irradiated from the observer 21 side at an angle other than a specified angle, a lattice pattern Ib formed by the light-transmitting portion 6a of the metal layer 6 can be observed, and an image Ic of the letter "A" reproduced in the relief hologram layer 8 can also be observed.

[0036] 6(a) and (b) are views of the hologram laminate shown in FIG. 4, and FIG. 6(b) is a plan view of the hologram laminate 10 as viewed from the surface of the second substrate 7 side in FIG. 6(a). As shown in FIG. 6(a), when a light source 22 is arranged on the observer 21 side and the hologram laminate 10 is irradiated with a reproduction illumination light from the light source 22 at a predetermined angle, an image is reproduced by the diffraction of light due to the interference fringes recorded in the volume hologram layer 3. At this time, as described above, the metal layer 6 has patterned light-transmitting portions 6a and light-reflecting portions 6b, and light can be transmitted through the light-transmitting portions 6a. Therefore, as shown in FIG. 6(b), a predetermined pattern Ib due to the light-transmitting portions 6a can be observed due to the contrast of light brightness at the light-transmitting portions 6a and light-reflecting portions 6b of the metal layer 6, and an image Ia reproduced in the volume hologram layer 3 can be observed in the light-transmitting portions 6a of the metal layer 6. Specifically, the metal layer 6 has a lattice-shaped light-transmitting portion 6a, and when reconstruction illumination light is irradiated at a predetermined angle from the observer 21 side, a lattice pattern Ib formed by the light-transmitting portion 6a of the metal layer 6 can be observed, and at the light-transmitting portion 6a of the metal layer 6, a star image Ia reproduced in the volume hologram layer 3 can be observed.

[0037] In this embodiment, when a relief hologram layer is disposed on the surface of the metal layer opposite to the volume hologram layer, the reconstructed image of the relief hologram layer can be observed together with the predetermined pattern of the light-transmitting part of the metal layer at angles other than the predetermined angle, while the reconstructed image of the volume hologram layer can be observed in the light-transmitting part of the metal layer together with the predetermined pattern of the light-transmitting part of the metal layer at the predetermined angle. Therefore, the presence of the volume hologram layer can be made even more difficult to notice, and the counterfeit prevention effect can be improved. Furthermore, the design can be improved.

[0038] Each component of the hologram laminate of this embodiment will be described below.

[0039] 1. Metal layer The metal layer in this embodiment is disposed on one surface of the volume hologram layer, and has patterned light-transmitting portions and light-reflecting portions.

[0040] The light-transmitting portion of the metal layer transmits light. In the light-transmitting portion of the metal layer, the spectral transmittance of the specific wavelength is, for example, preferably 70% or more, more preferably 80% or more, and even more preferably 90% or more. When the spectral transmittance of the specific wavelength in the light-transmitting portion is in the above range, it becomes easy to observe the reproduced image of the volume hologram layer in the light-transmitting portion of the metal layer when the hologram laminate is irradiated with a reproduction illumination light at a predetermined angle. It also makes it easier to observe the pattern due to the light transmitting portions of the metal layer.

[0041] Here, the specific wavelength is a reproduction wavelength of the volume hologram layer, and is a part of the wavelength in the visible light region.

[0042] The spectral transmittance of a specific wavelength in the light-transmitting portion of the metal layer refers to the spectral transmittance of a specific wavelength in the region where the light-transmitting portion of the metal layer is arranged in a configuration in which the volume hologram layer is removed from the hologram laminate, for example, in a laminate having a second substrate and a metal layer, or in a laminate having a second substrate, a relief hologram layer, and a metal layer in this order, the spectral transmittance of a specific wavelength in the region where the light-transmitting portion of the metal layer is arranged.

[0043] The metal layer may have a patterned light-transmitting portion, and the light-transmitting portion may be arranged in a pattern on the whole of the metal layer, or may be arranged in a pattern locally. For example, Fig. 5(a) and (b) show an example in which the light-transmitting portion 6a is arranged in a pattern on the whole of the metal layer 6, and Fig. 3(a) and (b) show an example in which the light-transmitting portion 6a is arranged in a pattern locally of the metal layer 6.

[0044] In addition, the ratio of the total area of ​​the patterned light-transmitting parts to the area of ​​the metal layer, i.e., the area ratio of the patterned light-transmitting parts, varies depending on the pattern shape of the light-transmitting parts, but is, for example, 0.5% to 50%, may be 1% to 30%, or may be 5% to 25%. If the area ratio of the light-transmitting parts is too small, it may be difficult to observe the reproduced image of the volume hologram layer in the light-transmitting parts. If the area ratio of the light-transmitting parts is too large, the presence of the volume hologram layer may be easily seen.

[0045] The pattern shape of the light transmitting portion in plan view is not particularly limited as long as the reproduced image of the volume hologram layer can be observed in the light transmitting portion, and examples thereof include characters, figures, symbols, combinations of these, etc. The figures include simple figures such as polygons, circles, ellipses, stars, and the like, as well as stripes, lattices, patterns, bar codes, two-dimensional codes, and the like.

[0046] For example, when the light transmitting parts are generally arranged in a stripe pattern, a lattice pattern, or the like in the metal layer, the reproduced image of the volume hologram layer can be observed in the entire metal layer through the light transmitting parts in the stripe pattern, the lattice pattern, etc. Also, when the light transmitting parts in a pattern such as characters, figures, symbols, etc. are locally arranged in the metal layer, the reproduced image of the volume hologram layer can be observed in a part of the metal layer through the light transmitting parts in the pattern such as characters, figures, symbols, etc.

[0047] Furthermore, the light transmitting portion can provide variable information, such as a name, an ID, a serial number, a barcode, or a two-dimensional code, to each hologram laminate, allowing the hologram laminate to be used as a variable information recording medium.

[0048] Furthermore, the line width of the light transmitting portion is not particularly limited as long as the reproduced image of the volume hologram layer can be observed in the light transmitting portion, and is appropriately selected depending on the pattern shape of the light transmitting portion, etc.

[0049] For example, when the light transmitting portion is striped or lattice-shaped, the line width of the light transmitting portion is 5 μm or more and 300 μm or less, may be 10 μm or more and 100 μm or less, or may be 20 μm or more and 50 μm or less. If the line width of the light transmitting portion is too small, it may be difficult to observe the reproduced image of the volume hologram layer in the light transmitting portion, or it may be difficult to observe the pattern of the light transmitting portion. Also, if the line width of the light transmitting portion is too large, it may be easy to see the presence of the volume hologram layer.

[0050] For example, when the light-transmitting portion is striped or lattice-shaped, the pitch of the stripes or the interval of the lattice is 10 μm or more and 500 μm or less, may be 30 μm or more and 400 μm or less, or may be 100 μm or more and 250 μm or less. If the pitch of the stripes or the interval of the lattice is too small, it may be difficult to observe the pattern of the light-transmitting portion or to form the pattern of the light-transmitting portion. If the pitch of the stripes or the interval of the lattice is too large, it may be difficult to observe the reproduced image of the volume hologram layer in the light-transmitting portion.

[0051] The dimensions of the light transmitting portion can be measured by observing the surface of the hologram laminate with, for example, an optical microscope or a laser microscope.

[0052] The material of the metal layer is not particularly limited as long as it is a metal material that can form a light-transmitting part in the metal layer by irradiating the laser with the metal layer surface by oxidation or the like, or by removing the metal layer. In particular, the material of the metal layer is preferably a metal material that can irradiate the metal layer surface by oxidation or the like, or the like. Examples of the metal layer include aluminum, zinc, indium, tin, titanium, and the like. Among them, aluminum is preferred. As described above, the metal layer can function as a reflective layer arranged on the surface of the relief hologram layer on the side of the concave-convex structure, and an aluminum film is commonly used.

[0053] When the light-transmitting portion is formed in the metal layer by modifying the surface of the metal layer, such as by oxidizing the metal layer, the light-transmitting portion is a portion of the metal layer surface that has been modified by oxidizing the metal layer, etc. In this case, the light-transmitting portion can have reflectivity, similar to the light-reflecting portion.

[0054] The thickness of the metal layer is, for example, 5 nm to 1 μm, and may be 10 nm to 100 nm. If the thickness of the metal layer is too thin, the spectral transmittance of a specific wavelength in the light reflecting portion of the metal layer may be high depending on the material of the metal layer, and the presence of the volume hologram layer may become easy to see. Also, if the thickness of the metal layer is too thick, it may be difficult to form the light transmitting portion.

[0055] For example, the metal layer may be formed on one surface of the second substrate by forming a metal layer on the one surface of the second substrate, and then forming a light transmitting portion in the metal layer by laser irradiation. For example, the metal layer may be formed on one surface of the second substrate by vacuum deposition, sputtering, or the like. As a method for forming a light transmitting portion in a metal layer by laser irradiation, a general method for laser marking of a metal layer can be applied.

[0056] As described below, when a support is disposed on the side of the volume hologram layer opposite the metal layer, the metal layer may be disposed over the entire one side of the support, or may be disposed over only a portion of the one side of the support.

[0057] Furthermore, as described below, when a relief hologram layer is disposed on the side of the metal layer opposite the volume hologram layer, the metal layer can also serve as a reflective layer that is disposed on the side of the relief hologram layer facing the concave-convex structure.

[0058] 2. Volume hologram layer In this embodiment, interference fringes are recorded in the volume hologram layer, and the interference fringes diffract light to reconstruct an image.

[0059] In this embodiment, the volume hologram layer is usually a reflection type volume hologram layer, so-called Lippmann hologram. The reflection type volume hologram layer refers to a volume hologram layer that can reconstruct an image by irradiating the reconstruction illumination light from the observer side of the volume hologram layer. In this embodiment, the hologram laminate is observed from the metal layer side, and the reconstruction image can be observed by irradiating the reconstruction illumination light from the metal layer side of the hologram laminate.

[0060] The image reproduced from the interference fringes recorded in the volume hologram layer is not particularly limited and can be designed appropriately.

[0061] The volume hologram layer may be transparent, semi-transparent or opaque.

[0062] The material used for the volume hologram layer may be the same as that used for a general volume hologram layer, for example, a curable resin such as a thermosetting resin or an ionizing radiation curable resin, a thermoplastic resin, a silver salt material, a dichromated gelatin emulsion, a photopolymerizable resin, a photocrosslinkable resin, a photoresist, a photorefractive material, a photochromic material, or other photosensitive material.

[0063] The volume hologram layer may contain additives as necessary. The additives may be the same as those used in general volume hologram layers. For example, sensitizing dyes, fine particles, thermal polymerization inhibitors, silane coupling agents, plasticizers, colorants, binder resins, etc. may be mentioned.

[0064] As materials used for the volume hologram layer, photosensitive materials containing a binder resin, a photopolymerizable compound, a photopolymerization initiator and a sensitizing dye, and photosensitive materials containing a cationic polymerizable compound, a radical polymerizable compound, a photoradical polymerization initiator and a photocationic polymerization initiator can be preferably used.

[0065] As described below, when a support is disposed on the side of the volume hologram layer opposite the metal layer, the volume hologram layer may be disposed on the entire one side of the support, or may be disposed on only a part of the one side of the support.

[0066] The volume hologram layer is arranged so as to overlap the metal layer in a planar view. Specifically, the volume hologram layer is arranged so that an image reproduced by interference fringes recorded in the volume hologram layer overlaps the light transmitting portion of the metal layer in a planar view. This makes it possible to make the presence of the volume hologram layer difficult to notice when observing from the metal layer side of the hologram laminate, and also makes it possible to observe the reproduced image of the volume hologram layer in the light transmitting portion of the metal layer, thereby improving the anti-counterfeiting effect.

[0067] The term "the volume hologram layer is arranged so as to overlap with the metal layer in a planar view" means that at least a portion of the volume hologram layer overlaps with the metal layer in a planar view. Also, the term "the volume hologram layer is arranged so that an image reproduced by interference fringes recorded in the volume hologram layer overlaps with a light transmitting portion of the metal layer in a planar view" means that at least a portion of the image reproduced by interference fringes recorded in the volume hologram layer overlaps with a light transmitting portion of the metal layer in a planar view.

[0068] Furthermore, as described below, when a relief hologram layer is disposed on the side of the metal layer opposite the volume hologram layer, the volume hologram layer may be disposed so as to overlap the relief hologram layer in a planar view, or may be disposed so as not to overlap the relief hologram layer in a planar view.

[0069] When the volume hologram layer is arranged so as to overlap the relief hologram layer in a planar view, specifically, the volume hologram layer is arranged so that an image reproduced by interference fringes recorded in the volume hologram layer overlaps in a planar view with an image reproduced by interference fringes recorded in the relief hologram layer, whereby when observed from the relief hologram layer side of the hologram laminate, the relief hologram layer makes it difficult to notice the presence of the volume hologram layer, thereby improving the anti-counterfeiting effect.

[0070] In addition, when the volume hologram layer is arranged so as not to overlap with the relief hologram layer in a planar view, specifically, the image reproduced by the interference fringes recorded in the volume hologram layer is arranged so as not to overlap with the image reproduced by the interference fringes recorded in the relief hologram layer in a planar view. In this case, the reproduced image of the volume hologram layer and the reproduced image of the relief hologram layer may be designed to be combined to form one image. The reproduced image of the volume hologram layer and the reproduced image of the relief hologram layer can form an integrated design.

[0071] Note that "the volume hologram layer is arranged so as to overlap with the relief hologram layer in a planar view" means that at least a portion of the volume hologram layer overlaps with the relief hologram layer in a planar view. Furthermore, "the volume hologram layer is arranged so that an image reproduced by interference fringes recorded in the volume hologram layer overlaps with an image reproduced by interference fringes recorded in the relief hologram layer in a planar view" means that at least a portion of the image reproduced by interference fringes recorded in the volume hologram layer overlaps with an image reproduced by interference fringes recorded in the relief hologram layer in a planar view.

[0072] The thickness of the volume hologram layer is not particularly limited as long as it is thick enough to record desired interference fringes, and is appropriately set depending on the application of the hologram laminate, the material of the volume hologram layer, etc. The specific thickness of the volume hologram layer can be the same as the thickness of a general volume hologram layer.

[0073] The volume hologram layer can be formed, for example, by causing an object beam and a reference beam having the same wavelength to interfere with each other on the volume hologram layer containing the above-mentioned material, thereby recording interference fringes.Specifically, the reflection type volume hologram layer can be formed by causing an object beam to be incident on one side of the volume hologram layer, and a reference beam to be incident on the other side, thereby recording interference fringes.

[0074] 3. Relief hologram layer In this embodiment, the relief hologram layer has a relief structure on its surface that corresponds to interference fringes.

[0075] In this embodiment, when observing the pattern of the light transmitting part of the metal layer or the reproduced image of the volume hologram layer, a light source is disposed on the surface of the hologram laminate facing the relief hologram layer, and the observation is made from the surface facing the relief hologram layer, so that the relief hologram layer usually has transparency. The transparency of the relief hologram layer can be the same as that of a general relief hologram layer, and can be appropriately adjusted depending on the application of the hologram laminate.

[0076] The image reproduced from the interference fringes recorded in the relief hologram layer is not particularly limited and can be designed appropriately.

[0077] The material used for the relief hologram layer may be the same as that used for a general relief hologram layer, for example, a curable resin such as a thermosetting resin or an ionizing radiation curable resin, a thermoplastic resin, a silver salt material, a dichromated gelatin emulsion, a diazo-based photosensitive material, a photoresist, a ferroelectric, a photochromic material, a thermochromic material, a chalcogenide glass, or other photosensitive material.

[0078] The relief hologram layer may contain additives as required, which may be the same as additives used in general relief hologram layers.

[0079] The shape of the relief hologram layer's relief structure may be any shape that allows the desired reproduced image to appear, and may be appropriately determined in the same manner as for the relief structure of a general relief hologram layer.

[0080] In the relief hologram layer, a reflective layer is usually arranged on the surface of the relief hologram layer facing the relief structure. By arranging the reflective layer on the surface of the relief hologram layer facing the relief structure, the reflection and diffraction efficiency of the relief structure can be increased, and a high-brightness reproduced image of the relief hologram layer can be produced. As for the reflective layer, the above-mentioned metal layer may also serve as the reflective layer, or a transparent reflective layer may be arranged on the surface of the relief hologram layer facing the relief structure in addition to the metal layer. The transparent reflective layer will be described later.

[0081] Furthermore, in this embodiment, since the hologram laminate is observed from the metal layer side, i.e., the relief hologram layer side, the relief hologram layer is positioned so that the side with the concave-convex structure faces the metal layer and the side opposite the concave-convex structure faces the observer and light source.

[0082] The thickness of the relief hologram layer is not particularly limited as long as it is thick enough to form a relief structure corresponding to a desired interference fringe, and is appropriately set depending on the application of the hologram laminate, the material of the relief hologram layer, etc. The specific thickness of the relief hologram layer can be the same as the thickness of a general relief hologram layer.

[0083] Examples of methods for forming a relief hologram layer include an embossing method and a 2P method.

[0084] 4. Optional configuration The hologram laminate of this embodiment may have an arbitrary configuration as necessary, in addition to the volume hologram layer, metal layer, and relief hologram layer. The arbitrary configuration is not particularly limited, and a configuration having a desired function can be used depending on the application and manufacturing method of the hologram laminate of this embodiment. Examples of the arbitrary configuration include a support, a base material, a protective layer, an adhesive layer, a primer layer, a laser coloring layer, a transparent reflective layer, a hard coat layer, an antistatic layer, a printing layer, an ink receiving layer, a release layer, a colored layer, and a separator.

[0085] 1, when a volume hologram transfer foil having a first adhesive layer 2, a volume hologram layer 3, and a first protective layer 4 in this order, and a metal label having a second adhesive layer 5, a metal layer 6, and a second substrate 7 in this order are used and the volume hologram transfer foil and the metal label are arranged in this order on one side of a support 1, the support 1, the first adhesive layer 2, the volume hologram layer 3, the first protective layer 4, the second adhesive layer 5, the metal layer 6, and the second substrate 7 may be arranged in this order in the hologram laminate 10. In this case, for example, by using the support 1 as a core sheet, the hologram laminate 10 can be used as an information recording medium such as a card.

[0086] 7(a), for example, when a volume hologram transfer foil having a first adhesive layer 2, a volume hologram layer 3, and a first protective layer 4 in this order, and a metal transfer foil having a second adhesive layer 5, a metal layer 6, and a second protective layer 9 in this order are used and the volume hologram transfer foil and the metal transfer foil are arranged in this order on one side of the support 1, the support 1, the first adhesive layer 2, the volume hologram layer 3, the first protective layer 4, the second adhesive layer 5, the metal layer 6, and the second protective layer 9 may be arranged in this order in the hologram laminate 10. In this case, for example, by using the support 1 as a core sheet, the hologram laminate 10 can be used as an information recording medium such as a card.

[0087] 7(b), for example, when a volume hologram label having a first adhesive layer 2, a volume hologram layer 3, and a first substrate 11 in this order, and a metal label having a second adhesive layer 5, a metal layer 6, and a second substrate 7 in this order are used and the volume hologram label and the metal label are arranged in this order on one side of the support 1, the support 1, the first adhesive layer 2, the volume hologram layer 3, the first substrate 11, the second adhesive layer 5, the metal layer 6, and the second substrate 7 may be arranged in this order in the hologram laminate 10. In this case, for example, by using the support 1 as a core sheet, the hologram laminate 10 can be used as an information recording medium such as a card.

[0088] 7(c), for example, when a volume hologram sheet having a first adhesive layer 2, a volume hologram layer 3, and a first substrate 11 in this order, and a metal label having a second adhesive layer 5, a metal layer 6, and a second substrate 7 in this order, or a metal transfer foil having a second adhesive layer 5, a metal layer 6, and a second protective layer 9 in this order, are used to arrange the volume hologram sheet on one side of the support 1, and a metal label or a metal transfer foil is arranged on the side of the volume hologram sheet opposite the support 1 via a transparent sheet 14, the support 1, the first adhesive layer 2, the volume hologram layer 3, the first substrate 11, the third adhesive layer 15, the transparent sheet 14, the second adhesive layer 5, the metal layer 6, and the second substrate 7 or the second protective layer 9 may be arranged in this order in the hologram laminate 10. In this case, for example, by using the support 1 as a core sheet and the transparent sheet 14 as an oversheet, the hologram laminate 10 can be used as an information recording medium such as a card.

[0089] 4, for example, when a volume hologram transfer foil having a first adhesive layer 2, a volume hologram layer 3, and a first protective layer 4 in this order, and a relief hologram label having a second adhesive layer 5, a metal layer 6, a relief hologram layer 8, and a second substrate 7 in this order are used, and the volume hologram transfer foil and the relief hologram label are arranged in this order on one side of a support 1, the support 1, the first adhesive layer 2, the volume hologram layer 3, the first protective layer 4, the second adhesive layer 5, the metal layer 6, the relief hologram layer 8, and the second substrate 7 may be arranged in this order in the hologram laminate 10. In this case, for example, by using the support 1 as a core sheet, the hologram laminate 10 can be used as an information recording medium such as a card.

[0090] 8(a), for example, when a volume hologram transfer foil having a first adhesive layer 2, a volume hologram layer 3, and a first protective layer 4 in this order, and a relief hologram transfer foil having a second adhesive layer 5, a metal layer 6, a relief hologram layer 8, and a second protective layer 9 in this order are used and the volume hologram transfer foil and the relief hologram transfer foil are arranged in this order on one side of the support 1, the support 1, the first adhesive layer 2, the volume hologram layer 3, the first protective layer 4, the second adhesive layer 5, the metal layer 6, the relief hologram layer 8, and the second protective layer 9 may be arranged in this order in the hologram laminate 10. In this case, for example, by using the support 1 as a core sheet, the hologram laminate 10 can be used as an information recording medium such as a card.

[0091] 8(b), for example, when a volume hologram label having a first adhesive layer 2, a volume hologram layer 3, and a first substrate 11 in this order, and a relief hologram label having a second adhesive layer 5, a metal layer 6, a relief hologram layer 8, and a second substrate 7 in this order are used and the volume hologram label and the relief hologram label are arranged in this order on one side of the support 1, the support 1, the first adhesive layer 2, the volume hologram layer 3, the first substrate 11, the second adhesive layer 5, the metal layer 6, the relief hologram layer 8, and the second substrate 7 may be arranged in this order in the hologram laminate 10. In this case, for example, by using the support 1 as a core sheet, the hologram laminate 10 can be used as an information recording medium such as a card.

[0092] Furthermore, for example, as shown in FIG. 8( c), in the case where a volume hologram sheet having a first adhesive layer 2, volume hologram layer 3, and first substrate 11 in this order, and a relief hologram label having a second adhesive layer 5, metal layer 6, relief hologram layer 8, and second substrate 7 in this order, or a relief hologram transfer foil having a second adhesive layer 5, metal layer 6, relief hologram layer 8, and second protective layer 9 in this order, is used to place the volume hologram sheet on one side of support 1, and place the relief hologram label or relief hologram transfer foil on the side of the volume hologram sheet opposite support 1 via transparent sheet 14, in the hologram laminate 10, the support 1, first adhesive layer 2, volume hologram layer 3, first substrate 11, third adhesive layer 15, transparent sheet 14, second adhesive layer 5, metal layer 6, relief hologram layer 8, and second substrate 7 or second protective layer 9 may be arranged in this order. In this case, for example, by using the support 1 as a core sheet and the transparent sheet 14 as an oversheet, the hologram laminate 10 can be used as an information recording medium such as a card.

[0093] 9(a), for example, when the metal layer 6 and the volume hologram layer 3 are disposed in this order on one surface of the second base material 7, the second base material 7, the metal layer 6, the primer layer 12, the volume hologram layer 3, and the first adhesive layer 2 may be disposed in this order in the hologram laminate 10. In this case, the hologram laminate 10 can be used as, for example, a hologram transfer foil, a hologram label, or an embedding hologram sheet.

[0094] 9(b), when the relief hologram layer 8, the metal layer 6, and the volume hologram layer 3 are arranged in this order on one surface of the second substrate 7, the second substrate 7, the relief hologram layer 8, the metal layer 6, the primer layer 12, the volume hologram layer 3, and the first adhesive layer 2 may be arranged in this order in the hologram laminate 10. In this case, the hologram laminate 10 can be used as, for example, a hologram transfer foil, a hologram label, or an embedding hologram sheet.

[0095] The optional configuration will now be described.

[0096] (1) Support The support in this embodiment is, for example, an adherend to which a volume hologram transfer foil or volume hologram label and a metal transfer foil or metal label are attached, or an adherend to which a volume hologram transfer foil or volume hologram label and a relief hologram transfer foil or relief hologram label are attached.

[0097] When the hologram laminate of this embodiment is used as a card, the support is a member that becomes the base of the card, and is a core sheet. Examples of the core sheet include resin sheets such as polyethylene terephthalate (PET), amorphous polyethylene terephthalate (PET-G), polyvinyl chloride (PVC), and polycarbonate (PC). The core sheet may be, for example, made of a resin sheet, or may be a resin sheet having a colored layer disposed on one side thereof. The outer shape of the core sheet is the same as that of the card.

[0098] The support may be transparent or opaque. The color of the support is not particularly limited and may be any color.

[0099] (2) First substrate and second substrate In this embodiment, the first substrate is a member that supports a volume hologram layer in a volume hologram label when a hologram laminate is manufactured using the volume hologram label. The second substrate is a member that supports a metal layer or a relief hologram layer in a metal label or a relief hologram label when a hologram laminate is manufactured using a metal label or a relief hologram label. The second substrate may be a member that supports each layer when layers such as a relief hologram layer, a metal layer, and a volume hologram layer are formed in order on one surface of the second substrate.

[0100] The first and second substrates are not particularly limited as long as they can support the volume hologram layer, metal layer, and relief hologram layer, and can be appropriately selected depending on the application of the hologram laminate.

[0101] The first and second substrates may be resin films, and examples of the resin that may be used for the resin film include polyester resins such as polyethylene terephthalate, polycarbonate, acrylic resins, cycloolefin resins, polystyrene resins, and acrylic styrene resins.

[0102] The thickness of the first and second substrates is appropriately selected depending on the application and type of the hologram laminate, and is, for example, from 2 μm to 200 μm, and preferably from 10 μm to 50 μm.

[0103] The first and second substrates may be surface-treated to enhance adhesion to the volume hologram layer, metal layer, and relief hologram layer. Examples of surface treatments include corona treatment, ozone treatment, plasma treatment, ionizing radiation treatment, dichromate treatment, anchor or primer treatment, etc. Examples of primers include urethane-based, acrylic-based, ethylene-vinyl acetate copolymer-based, vinyl chloride-vinyl acetate copolymer-based, and other various primers.

[0104] (3) First protective layer and second protective layer In this embodiment, the first protective layer is a member that protects the volume hologram layer and maintains the physical strength, etc., of the transferred volume hologram layer when a hologram laminate is manufactured using a volume hologram transfer foil. The second protective layer is a member that protects the metal layer and the relief hologram layer and maintains the physical strength, etc., of the transferred metal layer and the relief hologram layer when a hologram laminate is manufactured using a metal transfer foil and a relief hologram transfer foil.

[0105] Examples of materials used for the first protective layer and the second protective layer include a mixture of one or more materials selected from the group consisting of acrylic resins, vinyl chloride-vinyl acetate copolymers, polyester resins, polymethacrylate resins, polyvinyl chloride resins, cellulose resins, silicone resins, chlorinated rubbers, casein, various surfactants, metal oxides, etc., ionizing radiation curable resins that react with ultraviolet rays, electron beams, etc., thermosetting resins, thermoplastic resins, etc.

[0106] The thickness of the first protective layer and the second protective layer can be, for example, about 0.5 μm or more and 5 μm or less.

[0107] (4) First adhesive layer and second adhesive layer In this embodiment, the first adhesive layer is a member for bonding the volume hologram layer to the support when a hologram laminate is manufactured using a volume hologram transfer foil or a volume hologram label. The first adhesive layer may also be a member for bonding a laminate composed of layers such as a relief hologram layer, a metal layer, and a volume hologram layer to a support when these layers are formed in order on one side of the second base material. The second adhesive layer is a member for bonding the metal layer or the relief hologram layer to the volume hologram layer when a hologram laminate is manufactured using a metal transfer foil or a metal label, or a relief hologram transfer foil or a relief hologram label.

[0108] When a hologram laminate is produced using a volume hologram transfer foil, a metal transfer foil, or a relief hologram transfer foil, a heat sealant is used as the adhesive constituting the first adhesive layer and the second adhesive layer.

[0109] The heat sealing agent contains a thermoplastic resin. The thermoplastic resin is not particularly limited and is appropriately selected depending on the type of members to be bonded, etc. Examples of thermoplastic resins include maleic acid modified vinyl chloride-vinyl acetate copolymers, ethylene-vinyl acetate copolymers, vinyl chloride-vinyl acetate copolymers, polyamide resins, polyester resins, polyethylene resins, ethylene-isobutyl acrylate copolymers, butyral resins, polyvinyl acetate and its copolymers, ionomer resins, acid modified polyolefin resins, (meth)acrylic resins such as acrylic and methacrylic resins, acrylic acid ester resins, ethylene-(meth)acrylic acid copolymers, ethylene-(meth)acrylic acid ester copolymers, polymethyl methacrylate resins, cellulose resins, polyvinyl ether resins, polyurethane resins, polycarbonate resins, polypropylene resins, epoxy resins, phenolic resins, vinyl resins, maleic acid resins, alkyd resins, polyethylene oxide resins, urea resins, melamine resins, melamine-alkyd resins, silicone resins, rubber resins, styrene-butadiene-styrene block copolymers (SBS), styrene-isoprene-styrene block copolymers (SIS), styrene-ethylene-butylene-styrene block copolymers (SEBS), styrene-ethylene-propylene-styrene block copolymers (SEPS), and the like. The thermoplastic resin may be used alone or in combination of two or more kinds.

[0110] The heat sealing agent may contain additives, such as dispersants, fillers, plasticizers, and antistatic agents.

[0111] When manufacturing a hologram laminate using a volume hologram transfer foil, a metal transfer foil, or a relief hologram transfer foil, the thickness of the first adhesive layer and the second adhesive layer is not particularly limited and is selected appropriately depending on the type of components to be bonded, etc., but is preferably, for example, 0.3 μm or more and 50 μm or less, and more preferably 0.5 μm or more and 25 μm or less. If the thickness of the first adhesive layer and the second adhesive layer is too thin, the adhesion may be insufficient. Furthermore, if the first adhesive layer and the second adhesive layer are too thick, the heating temperature during transfer becomes too high, which may cause damage to other members.

[0112] When a heat sealant is used for the first adhesive layer and the second adhesive layer, the first adhesive layer and the second adhesive layer may be a single layer or a multilayer. In the case of a multilayer, layers of the same composition may be laminated, or layers of different compositions may be laminated.

[0113] When a hologram laminate is produced using a volume hologram label, a metal label, or a relief hologram label, examples of adhesives that constitute the first adhesive layer and the second adhesive layer include heat sealing agents and pressure-sensitive adhesives.

[0114] The heat sealant has been described above, so a detailed description thereof will be omitted here.

[0115] Examples of pressure-sensitive adhesives include acrylic adhesives, rubber adhesives, silicone adhesives, urethane adhesives, and polyester adhesives. Among them, it is preferable to use acrylic adhesives, which are excellent in durability and adhesion and low cost. The pressure-sensitive adhesive may be a solvent-based adhesive or a solventless adhesive. As the solventless adhesive, a photosensitive adhesive may be used.

[0116] The acrylic adhesive contains an acrylic resin as a main component, and may contain a crosslinking agent, a tackifier, etc., added as required.

[0117] The pressure-sensitive adhesive may contain various additives such as antioxidants and ultraviolet absorbers, as long as they do not impair its performance. When a photosensitive adhesive that cures upon irradiation with ultraviolet or visible light is used, a polymerization initiator is added. When a photosensitive adhesive that cures upon irradiation with electron beams is used, no polymerization initiator is added.

[0118] When manufacturing a hologram laminate using a volume hologram label, a metal label, or a relief hologram label, the thickness of the first adhesive layer and the second adhesive layer is, for example, 4 μm or more and 200 μm or less, and preferably 5 μm or more and 100 μm or less.

[0119] (5) Laser coloring layer In this embodiment, as shown in FIG. 10(a) and (b), for example, a laser coloring layer 13 having a patterned coloring portion 12a may be disposed between the support 1 and the volume hologram layer 3. The laser coloring layer is a member that develops color by laser irradiation and has a patterned coloring portion. When forming a light transmitting portion in the metal layer by laser irradiation, a coloring portion can be formed in the laser coloring layer at the same time. In this case, the pattern of the light transmitting portion of the metal layer and the pattern of the coloring portion of the laser coloring layer become the same, and the visibility of the reproduced image of the volume hologram layer in the light transmitting portion of the metal layer and the visibility of the pattern of the light transmitting portion of the metal layer can be improved. In addition, since the metal layer tends to become brittle due to heat caused by laser irradiation, when the volume hologram layer is peeled off from the support, the metal layer is likely to be cohesively broken, or peeled off between the metal layer and the primer layer, and the volume hologram layer and the laser coloring layer remain on the support side. Therefore, the counterfeit prevention effect can be improved.

[0120] The laser color developing layer may contain a binder resin and a laser color developing agent.

[0121] Examples of the binder resin include polyolefin resin, vinyl resin, polyester resin, polyamide resin, acrylic resin, and phenol resin.

[0122] Examples of the laser coloring agent include coloring agents such as dyes and pigments, and clays.

[0123] The laser coloring layer may contain additives as necessary.

[0124] The thickness of the laser coloring layer is, for example, 0.2 μm or more and 200 μm or less, optionally 1 μm or more and 150 μm or less, or optionally 20 μm or more and 100 μm or less.

[0125] The method of forming the laser coloring layer can be, for example, a method of coating a resin composition containing a binder resin and a laser coloring agent on one side of a support.The method of forming a coloring part on the laser coloring layer can be, for example, laser irradiation.In this embodiment, the laser irradiation can form a light transmission part on the metal layer and at the same time form a coloring part on the laser coloring layer.

[0126] (6)Transparent reflective layer In this embodiment, a transparent reflective layer may be disposed between the metal layer and the relief hologram layer on the surface of the relief hologram layer facing the relief structure.

[0127] As the transparent reflective layer, for example, a transparent metal reflective layer or a transparent resin reflective layer described in JP-A-2013-014081, JP-A-2014-02646, or the like can be used.

[0128] 5. Usage of hologram laminate The hologram laminate of this embodiment may be used as an information recording medium such as a card, a hologram transfer foil, a hologram label, or an embedded hologram sheet. The hologram laminate may also be used as a data page. The card, the hologram transfer foil, the hologram label, and the data page will be described later.

[0129] 6. Manufacturing method of hologram laminate The method for manufacturing the hologram laminate of this embodiment is not particularly limited as long as it is a method capable of manufacturing the above-mentioned hologram laminate, and can be the same as the method for manufacturing a general hologram laminate.

[0130] For example, a volume hologram transfer foil or volume hologram label and a metal transfer foil or metal label may be used, the volume hologram transfer foil or volume hologram label may be attached to a support, and then the metal transfer foil or metal label may be attached to the volume hologram transfer foil or volume hologram label. Also, for example, a volume hologram transfer foil or volume hologram label and a relief hologram transfer foil or relief hologram label may be used, the volume hologram transfer foil or volume hologram label may be attached to a support, and then the relief hologram transfer foil or relief hologram label may be attached to the volume hologram transfer foil or volume hologram label.

[0131] Alternatively, a relief hologram layer, a metal layer, a volume hologram layer, and other layers may be formed in that order on the second substrate.

[0132] For example, a volume hologram layer, a metal layer, and a relief hologram layer may be disposed on a support to obtain a laminate, and then a laser may be irradiated onto the laminate to form a light-transmitting portion in the metal layer. Alternatively, a metal transfer foil, a metal label, a relief hologram transfer foil, or a relief hologram label may be prepared in advance, irradiated with a laser to form a light-transmitting portion in the metal layer, and then attached onto the support.

[0133] II. Second embodiment The hologram laminate of this embodiment has a relief hologram layer, and a metal layer disposed on one surface of the relief hologram layer and having dot-shaped light-transmitting portions and light-reflecting portions.

[0134] The hologram laminate of this embodiment will be described with reference to the drawings. FIG. 11 is a schematic cross-sectional view showing an example of the hologram laminate of this embodiment. As illustrated in FIG. 11, the hologram laminate 10 has a relief hologram layer 8 and a metal layer 6 arranged on one surface of the relief hologram layer 8 and having dot-shaped light-transmitting parts 6a and light-reflecting parts 6b. The hologram laminate 10 may further have any layer as necessary, and in FIG. 11, a support 1, a second adhesive layer 5, a metal layer 6, a relief hologram layer 8, and a second substrate 7 are arranged in this order. The metal layer 6 is arranged on the surface of the relief hologram layer 8 on the concave-convex structure side, and can function as a reflective layer. In the metal layer 6, not only the light-reflecting parts 6b but also the light-transmitting parts 6a can function as a reflective layer.

[0135] 12(a) and (b) are views of the hologram laminate shown in FIG. 11, and FIG. 12(b) is a plan view of the hologram laminate 10 as viewed from the surface of the second substrate 7 in FIG. 12(a). As shown in FIG. 12(a) and (b), when a light source 22 is disposed on the observer 21 side and the hologram laminate 10 is irradiated with a reconstruction illumination light from the light source 22, an image Ic is reproduced by the diffraction of light due to the interference fringes recorded in the relief hologram layer 8. Specifically, when the reconstruction illumination light is irradiated from the observer 21 side, the image Ic of the letter "A" reproduced in the relief hologram layer 8 can be observed. At this time, as shown in FIG. 13(c) described later, since the metal layer 6 has fine dot-shaped light transmitting parts 6a, the pattern due to the fine dot-shaped light transmitting parts 6a cannot be visually observed even when light is irradiated from the observer 21 side.

[0136] 13(a) to (c) are views of the hologram laminate shown in FIG. 11, FIG. 13(b) is a plan view of the hologram laminate 10 observed from the surface of the second substrate 7 side in FIG. 13(a), and FIG. 13(c) is an enlarged view of part A in FIG. 13(b). As shown in FIG. 13(a) to (c), when a light source 22 is disposed on the side opposite to the observer 21 and light is irradiated from the light source 22 to the hologram laminate 10, a predetermined pattern Ib of fine dot-shaped light transmission parts 6a can be observed by the light transmitted through the light transmission parts 6a of the metal layer 6. Specifically, when light is irradiated from the side opposite to the observer 21, a pattern Ib of the numeral "1" can be observed by the fine dot-shaped light transmission parts 6a of the metal layer 6.

[0137] In this embodiment, since the metal layer having the fine dot-shaped light transmitting portion and the light reflecting portion is arranged, the pattern of the fine dot-shaped light transmitting portion of the metal layer can be observed by looking through the hologram laminate. Therefore, when light is irradiated from the observer side, the reproduced image of the relief hologram layer can be observed, while when light is irradiated from the opposite side to the observer, the pattern of the fine dot-shaped light transmitting portion of the metal layer can be observed. Therefore, the relief hologram layer can make the presence of the dot-shaped light transmitting portion of the metal layer difficult to notice, and the counterfeit prevention effect can be improved. In addition, the design can be improved. Furthermore, when the light transmitting portion is formed in the metal layer by, for example, laser irradiation, the fine dot-shaped light transmitting portion can impart variable information such as, for example, a name, an ID, a serial number, a barcode, a two-dimensional code, etc. to each hologram laminate, and the hologram laminate can be used as a variable information recording medium.

[0138] FIG. 14 is a schematic cross-sectional view showing another example of the hologram laminate of this embodiment. As illustrated in FIG. 14, the hologram laminate 10 has a volume hologram layer 3 and a metal layer 6 arranged on one surface of the volume hologram layer 3 and having a patterned light-transmitting portion 6a and a light-reflecting portion 6b. The hologram laminate 10 may further have any layer as necessary, and in FIG. 14, a support 1, a first adhesive layer 2, a volume hologram layer 3, a first protective layer 4, a second adhesive layer 5, a metal layer 6, a relief hologram layer 8, and a second base material 7 are arranged in this order. The metal layer 6 is arranged on the surface of the relief hologram layer 8 on the concave-convex structure side, and can function as a reflective layer.

[0139] 15(a) and (b) are diagrams of the hologram laminate shown in FIG. 14 when observed, and FIG. 15(b) is a plan view of the hologram laminate 10 when observed from the surface of the second substrate 7 side in FIG. 15(a). As shown in FIG. 15(a) and (b), when a light source 22 is arranged on the observer 21 side and the hologram laminate 10 is irradiated with reconstruction illumination light from the light source 22, an image Ic is reproduced by diffraction of light due to interference fringes recorded in the relief hologram layer 8. Specifically, when the reconstruction illumination light is irradiated from the observer 21 side, the image Ic of the letter "A" reproduced in the relief hologram layer 8 can be observed. At this time, as shown in FIG. 16(c) described later, since the metal layer 6 has fine dot-shaped light transmitting parts 6a, even if light is irradiated from the observer 21 side, the pattern due to the fine dot-shaped light transmitting parts 6a cannot be visually observed.

[0140] 16(a) to (c) are views of the hologram laminate shown in FIG. 14, FIG. 16(b) is a plan view of the hologram laminate 10 observed from the surface of the second substrate 7 side in FIG. 16(a), and FIG. 16(c) is an enlarged view of part A in FIG. 16(b). As shown in FIG. 16(a) to (c), when a light source 22 is disposed on the side opposite to the observer 21 and light is irradiated from the light source 22 to the hologram laminate 10, a predetermined pattern Ib of fine dot-shaped light-transmitting portions 6a can be observed by the light transmitted through the light-transmitting portions 6a of the metal layer 6. Specifically, when light is irradiated from the side opposite to the observer 21, a pattern Ib of the numeral "1" can be observed by the fine dot-shaped light-transmitting portions 6a of the metal layer 6.

[0141] 17(a) and (b) are views of the hologram laminate shown in Fig. 14, and Fig. 17(b) is a plan view of hologram laminate 10 observed from the surface facing support 1 in Fig. 17(a). As shown in Fig. 17(a) and (b), when light source 22 is disposed on the observer 21 side and reconstruction illumination light is irradiated from light source 22 to hologram laminate 10 at a predetermined angle, image Ia is reconstructed by the diffraction of light due to the interference fringes recorded in volume hologram layer 3. Specifically, when the reconstruction illumination light is applied from the observer 21 side, it is possible to observe the star image Ia reconstructed in the volume hologram layer 3. At this time, as shown in Fig. 16(c) above, since the metal layer 6 has fine dot-shaped light transmitting portions 6a, the pattern due to the fine dot-shaped light transmitting portions 6a cannot be visually observed even when light is applied from the observer 21 side.

[0142] In this embodiment, when a volume hologram layer is disposed on the surface of the metal layer opposite to the relief hologram layer, the reproduced image of the volume hologram layer can be observed at a predetermined angle in the light transmitting portion of the reflective layer, and when observed from the relief hologram layer side, the reproduced image of the relief hologram layer can be observed, while when observed from the volume hologram layer side, the reproduced image of the volume hologram layer can be observed, and when observed through the hologram laminate, a pattern of fine dot-shaped light transmitting portions of the metal layer can be observed. Therefore, the counterfeit prevention effect can be improved. Furthermore, the design can be improved.

[0143] In this embodiment, the configuration other than the metal layer and the support can be the same as in the first embodiment.

[0144] The metal layer and the support in the hologram laminate of this embodiment will be described below.

[0145] 1. Metal layer The metal layer in this embodiment is disposed on one surface of the volume hologram layer, and has dot-shaped light-transmitting portions and light-reflecting portions.

[0146] The metal layer only needs to have dot-shaped light transmitting portions, and the dots may be dots generated by halftone dot processing, for example, or may be dots generated by an error diffusion method. In halftone processing, the gradation can be expressed by the size of the dots, and the density of the dots is constant, whereas in error diffusion, the gradation can be expressed by the density of the dots, and the size of the dots is constant.

[0147] The size of the dots is, for example, 5 μm to 400 μm, may be 10 μm to 200 μm, or may be 20 μm to 150 μm. If the dot size is too small, it may be difficult to observe the pattern due to the dot-shaped light transmitting portion. If the dot size is too large, the presence of the light transmitting portion may be easily noticeable.

[0148] In addition, the ratio of the total area of ​​the dot-shaped light transmitting portions to the area of ​​the metal layer, i.e., the area ratio of the dot-shaped light transmitting portions, is, for example, 0.5% to 50%, may be 1% to 30%, or may be 5% to 25%. If the area ratio of the light transmitting portions is too small, it may be difficult to observe the pattern of the dot-shaped light transmitting portions. If the area ratio of the light transmitting portions is too large, the presence of the light transmitting portions may be easily noticeable.

[0149] Examples of patterns that can be expressed by the dot-like light-transmitting portions include patterns of characters, figures, symbols, or combinations of these, as well as photographic patterns such as portraits and landscape photographs.

[0150] In addition, by using the pattern expressed by the dot-shaped light-transmitting portions, variable information such as a name, ID, a photograph, a serial number, a barcode, a two-dimensional code, etc. can be imparted to each hologram laminate, and the hologram laminate can be used as a variable information recording medium.

[0151] The material, thickness, formation method, arrangement, etc. of the metal layer may be the same as those in the first embodiment.

[0152] 2.Support In this embodiment, the support is transparent because the pattern of the dot-like light-transmitting portions of the metal layer can be observed by looking through the hologram laminate.

[0153] Other aspects of the support may be the same as those of the first embodiment.

[0154] III. Third embodiment The hologram laminate of this embodiment has a relief hologram layer, and a metal layer disposed on one surface of the relief hologram layer and having a pattern of semi-light-transmitting portions and light-reflecting portions.

[0155] The hologram laminate of this embodiment will be described with reference to the drawings. FIG. 18 is a schematic cross-sectional view showing an example of the hologram laminate of this embodiment. As illustrated in FIG. 18, the hologram laminate 10 has a relief hologram layer 8 and a metal layer 6 arranged on one surface of the relief hologram layer 8 and having a patterned light semi-transmitting portion 6c and a light reflecting portion 6b. The hologram laminate 10 may further have any layer as necessary, and in FIG. 18, a support 1, a second adhesive layer 5, a metal layer 6, a relief hologram layer 8, and a second substrate 7 are arranged in this order. The metal layer 6 is arranged on the surface of the relief hologram layer 8 on the concave-convex structure side, and can function as a reflective layer. In the metal layer 6, not only the light reflecting portion 6b but also the light semi-transmitting portion 6c can function as a reflective layer.

[0156] 19(a) and (b) are diagrams of the hologram laminate shown in FIG. 18 when observed, and FIG. 19(b) is a plan view of the hologram laminate 10 when observed from the surface of the second substrate 7 side in FIG. 19(a). As shown in FIG. 19(a) and (b), when a light source 22 is arranged on the observer 21 side and the hologram laminate 10 is irradiated with reconstruction illumination light from the light source 22, an image Ic is reproduced by diffraction of light due to interference fringes recorded in the relief hologram layer 8. Specifically, when the reconstruction illumination light is irradiated from the observer 21 side, the image Ic of the letter "A" reproduced in the relief hologram layer 8 can be observed. At this time, the metal layer 6 has a patterned light semi-transmitting portion 6c and a light reflecting portion 6b, and since the difference in optical properties between the light semi-transmitting portion 6c and the light reflecting portion 6b is small, the pattern due to the patterned light semi-transmitting portion 6c cannot be visually observed even when light is irradiated from the observer 21 side.

[0157] 20(a) and (b) are views of the hologram laminate shown in FIG. 18, and FIG. 20(b) is a plan view of the hologram laminate 10 as viewed from the surface of the second substrate 7 side in FIG. 20(a). As shown in FIG. 20(a) and (b), when a light source 22 is disposed on the side opposite to the observer 21 and the hologram laminate 10 is irradiated with light from the light source 22, a predetermined pattern Id formed by the patterned semi-transmitting portions 6b of the metal layer 6 can be observed by the light transmitted through the semi-transmitting portions 6c of the metal layer 6. Specifically, when light is irradiated from the side opposite to the observer 21, a pattern Id of the numeral "1" formed by the patterned semi-transmitting portions 6c of the metal layer 6 can be observed.

[0158] In this embodiment, since the metal layer having the patterned light semi-transmitting portion and the light reflecting portion is arranged, the pattern of the patterned light semi-transmitting portion of the metal layer can be observed by looking through the hologram laminate. Therefore, when light is irradiated from the observer side, the reproduced image of the relief hologram layer can be observed, while when light is irradiated from the opposite side to the observer, the pattern of the patterned light semi-transmitting portion of the metal layer can be observed. Therefore, the relief hologram layer can make the existence of the patterned light semi-transmitting portion of the metal layer difficult to notice, and the counterfeit prevention effect can be improved. In addition, the design can be improved. Furthermore, when the light semi-transmitting portion is formed in the metal layer by, for example, laser irradiation, the patterned light transmitting portion can impart variable information such as, for example, a name, an ID, a serial number, a barcode, a two-dimensional code, etc., to each hologram laminate, and the hologram laminate can be used as a variable information recording medium.

[0159] FIG. 21 is a schematic cross-sectional view showing another example of the hologram laminate of this embodiment. As illustrated in FIG. 14, the hologram laminate 10 has a volume hologram layer 3 and a metal layer 6 arranged on one surface of the volume hologram layer 3 and having a patterned light semi-transmitting portion 6c and a light reflecting portion 6b. The hologram laminate 10 may further have any layer as necessary, and in FIG. 21, a support 1, a first adhesive layer 2, a volume hologram layer 3, a first protective layer 4, a second adhesive layer 5, a metal layer 6, a relief hologram layer 8, and a second base material 7 are arranged in this order. The metal layer 6 is arranged on the surface of the relief hologram layer 8 on the concave-convex structure side, and can function as a reflective layer.

[0160] 22(a) and (b) are diagrams of the hologram laminate shown in FIG. 21 when observed, and FIG. 22(b) is a plan view of the hologram laminate 10 when observed from the surface of the second substrate 7 side in FIG. 22(a). As shown in FIG. 22(a) and (b), when a light source 22 is arranged on the observer 21 side and the hologram laminate 10 is irradiated with reconstruction illumination light from the light source 22, an image Ic is reproduced by diffraction of light due to interference fringes recorded in the relief hologram layer 8. Specifically, when the reconstruction illumination light is irradiated from the observer 21 side, the image Ic of the letter "A" reproduced in the relief hologram layer 8 can be observed. At this time, the metal layer 6 has a patterned light semi-transmitting portion 6c and a light reflecting portion 6b, and since the difference in optical properties between the light semi-transmitting portion 6c and the light reflecting portion 6b is small, the pattern by the patterned light semi-transmitting portion 6c cannot be visually observed even when light is irradiated from the observer 21 side.

[0161] 23(a) and (b) are views of the hologram laminate shown in FIG. 21, and FIG. 23(b) is a plan view of the hologram laminate 10 as viewed from the surface of the second substrate 7 side in FIG. 23(a). As shown in FIG. 23(a) and (b), when a light source 22 is disposed on the side opposite to the observer 21 and light is irradiated from the light source 22 to the hologram laminate 10, a predetermined pattern Id due to the patterned light semi-transmitting portions 6c of the metal layer 6 can be observed by the light that has passed through the light semi-transmitting portions 6c of the metal layer 6. Specifically, when light is irradiated from the side opposite to the observer 21, a pattern Id of the numeral "1" due to the patterned light semi-transmitting portions 6c of the metal layer 6 can be observed.

[0162] Figures 24(a) and (b) are views of the hologram laminate shown in Figure 21, and Figure 24(b) is a plan view of hologram laminate 10 observed from the surface facing support 1 in Figure 24(a). As shown in Figures 24(a) and (b), when light source 22 is disposed on the observer 21 side and reconstruction illumination light is irradiated from light source 22 to hologram laminate 10 at a predetermined angle, image Ia is reconstructed by the diffraction of light due to the interference fringes recorded in volume hologram layer 3. Specifically, when reconstruction illumination light is applied from the observer 21 side, the star image Ia reconstructed in the volume hologram layer 3 can be observed. At this time, the metal layer 6 has a pattern of semi-transmitting parts 6c and light reflecting parts 6b, and since the difference in optical properties between the semi-transmitting parts 6c and the light reflecting parts 6b is small, the pattern of the semi-transmitting parts 6c cannot be visually observed even when light is applied from the observer 21 side.

[0163] In this embodiment, when a volume hologram layer is disposed on the surface of the metal layer opposite to the relief hologram layer, a reconstructed image of the relief hologram layer can be observed when light is irradiated from the relief hologram layer side and observed, while a reconstructed image of the volume hologram layer can be observed when light is irradiated from the volume hologram layer side and observed, and a pattern due to the patterned light semi-transmitting parts of the metal layer can be observed when observed through the hologram laminate. Therefore, the counterfeit prevention effect can be improved. Furthermore, the design can be improved.

[0164] In this embodiment, the configuration other than the metal layer and the support can be the same as in the first embodiment.

[0165] The metal layer and the support in the hologram laminate of this embodiment will be described below.

[0166] 1. Metal layer The metal layer in this embodiment is disposed on one surface of the volume hologram layer, and has a pattern of light semi-transmitting portions and light reflective portions.

[0167] The light semi-transmitting portion of the metal layer transmits light. In the light semi-transmitting portion of the metal layer, the spectral transmittance of a specific wavelength is, for example, preferably 10% to 75%, more preferably 20% to 60%, and even more preferably 30% to 50%. When the spectral transmittance of the specific wavelength in the light semi-transmitting portion is in the above range, the pattern due to the light semi-transmitting portion can be difficult to observe when light is irradiated from the observer side, while the pattern due to the light semi-transmitting portion can be easily observed when light is irradiated from the opposite side to the observer.

[0168] The spectral transmittance of a specific wavelength in the semi-light-transmitting portion of the metal layer refers to the spectral transmittance of a specific wavelength in the region where the semi-light-transmitting portion of the metal layer is arranged in a configuration in which the volume hologram layer is removed from the hologram laminate, for example, in a laminate having a second substrate, a relief hologram layer, and a metal layer in this order, it is the spectral transmittance of a specific wavelength in the region where the semi-light-transmitting portion of the metal layer is arranged.

[0169] In the metal layer, the arrangement of the semi-light-transmitting portions, the area ratio of the semi-light-transmitting portions, the pattern shape in a plan view of the semi-light-transmitting portions, etc. may be similar to the light-transmitting portions of the metal layer in the first embodiment.

[0170] In addition, the line width of the light semi-transmitting portion is not particularly limited as long as the pattern caused by the light semi-transmitting portion is difficult to observe when light is irradiated from the observer side, but the pattern caused by the light semi-transmitting portion can be observed when light is irradiated from the opposite side to the observer, and is selected appropriately depending on the pattern shape of the light semi-transmitting portion, etc.

[0171] For example, when the light semi-transmitting portion is striped or lattice-shaped, the line width of the light semi-transmitting portion is 5 μm or more and 300 μm or less, may be 10 μm or more and 100 μm or less, or may be 20 μm or more and 50 μm or less. If the line width of the light semi-transmitting portion is too small, it may be difficult to observe the pattern of the light semi-transmitting portion when light is irradiated from the side opposite to the observer. Also, if the line width of the light semi-transmitting portion is too large, it may be easy to see the presence of the light transmitting portion when light is irradiated from the observer side.

[0172] The dimensions of the light semi-transmitting portion can be measured by observing the surface of the hologram laminate with, for example, an optical microscope or a laser microscope.

[0173] The material, thickness, arrangement, etc. of the metal layer may be the same as in the first embodiment.

[0174] When the semi-light-transmitting portion is formed in the metal layer by modifying the surface of the metal layer, such as by oxidizing the metal layer, the semi-light-transmitting portion is a portion of the metal layer surface that has been modified by oxidizing the metal layer, etc. In this case, the semi-light-transmitting portion can have reflectivity, similar to the light-reflecting portion.

[0175] As a method for forming the metal layer, for example, a method of forming a metal layer on one side of the second substrate, and then forming a light semi-transmitting portion in the metal layer by laser irradiation can be mentioned. The method for forming a metal layer on one side of the second substrate can be the same as that of the first embodiment. In addition, as a method for forming a light semi-transmitting portion in the metal layer by laser irradiation, a general metal layer laser marking method can be applied. In this case, the optical properties of the light semi-transmitting portion can be controlled by adjusting the laser output. Specifically, when the laser output is low, the spectral transmittance of a specific wavelength in the light semi-transmitting portion tends to be low.

[0176] 2.Support In this embodiment, the support is transparent because the pattern of the patterned light semi-transmitting portions of the metal layer can be observed by looking through the hologram laminate.

[0177] Other aspects of the support may be the same as those of the first embodiment.

[0178] B. Card The card in this disclosure has the hologram laminate described above.

[0179] In the present disclosure, the hologram laminate may be used as a card. In addition, when the hologram laminate is a hologram transfer foil, a hologram label, or an embedding hologram sheet, the hologram laminate can be disposed on one side of the core sheet.

[0180] When the hologram laminate is used as a card, it may have the configurations shown in, for example, Figures 7(a)-(c) and 8(a)-(c) described above. In Figures 7(a), (b) and 8(a), (b), the support 1 may be a core sheet, and although not shown, a transparent sheet (over sheet) may be disposed on one side of the support so as to cover the metal layer 6, the relief hologram layer 8, etc. In Figures 7(c) and 8(c), the support 1 may be a core sheet, and the transparent sheet 14 may be an over sheet.

[0181] In addition, when the hologram laminate is a hologram transfer foil, a hologram label, or an embedding hologram sheet, it can be configured as shown in Figures 9(a) and (b) above, for example. In a card, the hologram laminate can be disposed on one surface of a core sheet.

[0182] The transparent sheet is a member that protects the volume hologram layer, the metal layer, and the relief hologram layer. When the transparent sheet is disposed on the outermost surface of the information recording medium, it can function as an oversheet that protects the surface of the information recording medium.

[0183] The transparent sheet may be any sheet having transparency, such as a resin sheet of polyethylene terephthalate (PET), amorphous polyethylene terephthalate (PET-G), polyvinyl chloride (PVC), polycarbonate (PC), etc. The surface of the transparent sheet may be, for example, mirror-like or matte. The outer shape of the transparent sheet is the same as the outer shape of the card.

[0184] When the hologram laminate is used as a card, the hologram laminate may have an arbitrary configuration as necessary. As the arbitrary configuration, a configuration having a desired function can be appropriately selected and used according to the application of the card. As the arbitrary configuration, for example, a third adhesive layer, a printing layer, an intermediate sheet, an oversheet, an interlayer adhesive layer, an IC module including an IC chip, an inlet including an IC chip and an antenna, a magnetic stripe, etc. can be mentioned.

[0185] For example, in Fig. 7(a)-(b) and Fig. 8(a)-(b), although not shown, when a transparent sheet is disposed on one surface of the support 1 so as to cover the second protective layer 9 or the second base material 7, a third adhesive layer may be disposed between the transparent sheet and the second protective layer 9 or the second base material 7. An example of the adhesive constituting the third adhesive layer is a heat sealant. The heat sealant is as described above.

[0186] Examples of cards include various IC cards, driver's licenses, insurance cards, employee ID cards, membership cards, student ID cards and other ID cards, credit cards, debit cards, cash cards, card keys, point cards, prepaid cards, and the like.

[0187] C. Holographic transfer foil The hologram transfer foil in the present disclosure has the above-mentioned hologram laminate. In the present disclosure, the hologram laminate can be used as the hologram transfer foil.

[0188] When the hologram laminate is used as a hologram transfer foil, it may be configured as shown in Figures 9(a) and (b) above. In this case, although not shown, a separator may be disposed on the surface of the first adhesive layer opposite to the volume hologram layer.

[0189] D. Holographic label The hologram label in the present disclosure has the above-mentioned hologram laminate. In the present disclosure, the hologram laminate can be used as the hologram label.

[0190] When the hologram laminate is used as a hologram label, it may be configured as shown in Figures 9(a) and (b) above. In this case, although not shown, a separator may be disposed on the surface of the first adhesive layer opposite to the volume hologram layer.

[0191] E. Data Page The data page in this disclosure comprises the hologram stack described above.

[0192] The hologram laminate constituting the data page can be, for example, a hologram laminate as shown in Fig. 9(a) and (b) above. In this case, the hologram laminate is a hologram transfer foil, a hologram label, or an embedding hologram sheet. In the data page, the hologram laminate can be disposed on one surface of the core sheet. Also, an IC chip holding sheet including an IC chip therein and a first transparent sheet may be disposed in this order on the surface of the core sheet opposite to the hologram laminate, and a second transparent sheet may be disposed on one surface of the support so as to cover the metal layer, the relief hologram layer, etc.

[0193] The core sheet is a member having a connecting portion for assembling the data pages into a booklet. The data pages can be attached, such as by stitching, to the cover and other pages of the booklet via the connections of the core sheet.

[0194] Examples of the core sheet include a fiber sheet and a sheet in which resin sheets are disposed on both sides of a fiber sheet.

[0195] The core sheet may also have an opening that overlaps with the volume hologram layer or the relief hologram layer in a plan view, for example, so that the volume hologram layer or the relief hologram layer can be seen through the opening from one or both sides of the data page.

[0196] The IC chip holding sheet is a member that contains an IC chip therein. The IC chip holding sheet may contain an antenna and the like in addition to the IC chip therein. The IC chip holding sheet may also serve as the core sheet.

[0197] The IC chip holding sheet may have any structure as long as it can contain an IC chip, an antenna, etc., and may have, for example, a multi-layer structure. The IC chip holding sheet may be, for example, a resin sheet such as polyethylene terephthalate (PET), amorphous polyethylene terephthalate (PET-G), polyvinyl chloride (PVC), polycarbonate (PC), etc.

[0198] The IC chip holding sheet may have an opening that overlaps with the volume hologram layer or the relief hologram layer in a plan view, for example, and through which the volume hologram layer or the relief hologram layer can be seen from one or both sides of the data page.

[0199] The first transparent sheet and the second transparent sheet are members that protect the surface of the data page. The first transparent sheet and the second transparent sheet may be any sheet having transparency, and may be, for example, a resin sheet such as polyethylene terephthalate (PET), amorphous polyethylene terephthalate (PET-G), polyvinyl chloride (PVC), polycarbonate (PC), etc.

[0200] When the hologram laminate is used as a data page, the hologram laminate may have an arbitrary configuration as necessary. As the arbitrary configuration, a configuration having a desired function can be appropriately selected and used depending on the application of the data page. Examples of the arbitrary configuration include a laser print layer, a white layer, a print layer, an intermediate layer, and the like.

[0201] F. Booklets The booklet in the present disclosure includes the above-mentioned data page. Examples of the booklet include a passport.

[0202] The present disclosure is not limited to the above-described embodiments. The above-described embodiments are merely examples, and anything that has substantially the same configuration as the technical idea described in the claims of the present disclosure and exhibits similar effects is included in the technical scope of the present disclosure. EXAMPLES

[0203] The present disclosure will now be described in detail with reference to examples.

[0204] [Example 1] (1) Preparation of Film A and Film B First, film A and film B were prepared separately by independent processes.

[0205] (Preparation of Film B) A polyethylene terephthalate (PET) film (Lumirror T60; manufactured by Toray Industries, Inc.) having a thickness of 50 μm was used as the substrate B. A resin composition in which polymethyl methacrylate was dissolved in a solvent was applied to the substrate B with a bar coater to a thickness of 1 μm, and then dried to form a protective layer, thereby obtaining the film B.

[0206] (Preparation of Film A) A volume hologram layer composition having the following composition was applied to the substrate A, which was a 50 μm-thick polyethylene terephthalate (PET) film (Lumirror T60; manufactured by Toray Industries, Inc.), at a speed of 30 m / min by gravure coating, and the solvent was evaporated at 100° C. to form a volume hologram-forming layer having a thickness of about 10 μm. A 38 μm-thick polyethylene terephthalate (PET) film (SP-PET; manufactured by Mitsui Chemicals Tocello, Inc.) with a release-treated surface was laminated onto the volume hologram-forming layer to obtain film A.

[0207] <Composition of the volume hologram layer composition> Polymethyl methacrylate 100 parts by weight 9,9-bis(4-acryloxydiethoxyphenyl)fluorene 5 parts by weight 1,6-Hexanediol diglycidyl ether 70 parts by weight Diphenyliodonium hexafluoroantimonate 5 parts by mass 1 part by mass of 3,9-diethyl-3'-carboxymethyl-2,2'-thiocarbocyanine iodonium salt Methyl ethyl ketone 30 parts by weight Methanol 30 parts by weight

[0208] (2) Preparation of volume hologram transfer foil Next, a hologram was recorded on the volume hologram forming layer, and a resin layer was laminated. Specifically, first, the release PET film was peeled off from the film A, and the exposed volume hologram forming layer was laminated on the hologram master plate, and a Lippmann hologram was photographed and recorded using a laser beam with a wavelength of 532 nm at an incident angle of 45° and an exit angle of 0°. Next, the film A was peeled off from the hologram master plate, and a polypropylene film (Alphan E-201F; manufactured by Oji F-Tex Co., Ltd.) was laminated on the exposed volume hologram layer surface to obtain a laminate 1 having a polypropylene film, a volume hologram layer, and a substrate A in this order.

[0209] Next, the polypropylene film was peeled off from the laminate 1, and film B was laminated while being heated to 80°C, to obtain a laminate 2 having substrate B, a protective layer, a volume hologram layer, and substrate A in this order. Thereafter, the laminate 2 was heated and fixed. Specifically, the laminate 2 was maintained in an atmosphere of 90°C for 3 minutes, and then irradiated with 2500 mJ / cm 2 of a high-pressure mercury lamp. 2 The resulting mixture was then irradiated with ultraviolet light for 100 hr to effect fixation.

[0210] Next, the substrate A was peeled off from the laminate 2, and a heat sealant composition in which an ethylene-vinyl acetate copolymer was dissolved in a solvent was applied to the exposed volume hologram layer with a bar coater to a thickness of 5 μm, and then dried to form a heat seal layer. This resulted in a volume hologram transfer foil.

[0211] (3) Creation of relief hologram labels A polyethylene terephthalate (PET) film (Lumirror T60; manufactured by Toray Industries, Inc.) having a thickness of 50 μm was used as the substrate C. An ultraviolet-curable resin composition was applied to one side of the substrate C, and cured by irradiating ultraviolet light while a mold for replicating a relief hologram was pressed against the substrate C, forming a hologram-forming layer having fine irregularities of a hologram. Aluminum was vapor-deposited to a thickness of 400 Å on the fine irregularities of the obtained hologram-forming layer, forming a metal layer. A pressure-sensitive adhesive composition in which an acrylic resin (PE-118; manufactured by Nissetsu Co., Ltd.) was dissolved in a solvent was applied to the exposed surface of the metal layer by a bar coater to a thickness of 20 μm, and the pressure-sensitive adhesive layer was formed by drying. This resulted in a relief hologram label.

[0212] (4) Fabrication of hologram laminate The volume hologram transfer foil was transferred to the support by heating to 120°C and applying pressure, and then the base material B was peeled off to expose the protective layer. After that, a relief hologram label was laminated on the protective layer surface by adhering a pressure-sensitive adhesive layer. At this time, the volume hologram was laminated by rotating the incident direction of the reproduction light 90° counterclockwise with respect to the relief hologram reproduction image.

[0213] (5) Laser marking on metal layer A grid pattern was drawn on the above hologram laminate with a laser beam diameter of 40 μm and a scanning interval during drawing of 220 μm, forming a pattern having grid-like light-transmitting portions and light-reflecting portions with a grid line width of 40 μm and a grid interval of 220 μm.

[0214] [Rating 1] First, the prepared hologram laminate was irradiated with a reconstruction illumination light at an incidence angle of about 45°, and the hologram laminate was observed from the same side as the reconstruction illumination light at an observation angle of about 0°. As shown in FIG. 25(a), only the reconstruction image of the relief hologram (English alphabet letters, hemp leaf pattern, and micro-characters of "GENUINE") was observed. Next, the reconstruction illumination light was irradiated at an incidence angle of about 45° from a position where the incidence direction of the reconstruction illumination light was rotated 90° counterclockwise, and the hologram laminate was observed from the same side as the reconstruction illumination light at an observation angle of about 0°. As shown in FIG. 25(b), the reconstruction image of the volume hologram (such as a wavy line pattern) could be confirmed through the lattice-shaped light transmitting part. In addition, in FIG. 25(b), the reconstruction image of the volume hologram was also visually observed in green. Note that, in the present disclosure, the color of the reconstruction image of the volume hologram is not particularly limited.

[0215] [Example 2] (1) Creation of relief hologram film A 16 μm-thick polyethylene terephthalate (PET) film (Lumirror; manufactured by Toray Industries, Inc.) was used as the substrate D. An ultraviolet-curable resin composition was applied to one side of the substrate D, and cured by irradiating ultraviolet light while a relief hologram duplication mold was attached under pressure, to form a hologram-forming layer having fine projections and recesses of a hologram. Aluminum was vapor-deposited onto the fine projections and recesses of the obtained hologram-forming layer to a thickness of 400 Å to form a metal layer. A primer resin was applied to the exposed surface of the metal layer to form a primer layer.

[0216] (2) Fabrication of hologram laminate Next, a hologram was recorded on the volume hologram forming layer, and a resin layer was laminated. Specifically, first, the release PET film was peeled off from the film A used in Example 1, and the exposed volume hologram forming layer was laminated on the hologram master plate, and a Lippmann hologram was photographed and recorded at an incident angle of 45° and an exit angle of 0° using a laser beam with a wavelength of 532 nm. At this time, the substrate A side was set as the front side for the reproduced image of the volume hologram. Next, the film A was peeled off from the hologram master plate, and a polypropylene film (Alphan E-201F; manufactured by Oji F-Tex Co., Ltd.) was laminated on the exposed surface of the volume hologram layer to obtain a laminate 1 having a polypropylene film, a volume hologram layer, and a substrate A in this order.

[0217] Next, the polypropylene film was peeled off from the laminate 1, and the relief hologram film was laminated while being heated to 80°C, to obtain a laminate 2 having a substrate D, a relief hologram layer, a metal layer, a primer layer, a volume hologram layer, and a substrate A in this order. The laminate 2 was then heated and fixed. Specifically, the laminate 2 was maintained in an atmosphere of 90°C for 3 minutes, and then irradiated with 2500 mJ / cm2 of a high-pressure mercury lamp. 2 The dye was fixed by irradiating it with ultraviolet light.

[0218] (3) Laser marking on metal layer Drawing was performed on the above hologram laminate with a laser beam diameter of 80 μm, forming an image of a human face having dot-like light-transmitting portions and light-reflecting portions each having a diameter of 80 μm.

[0219] [Rating 2] First, the fabricated hologram laminate was irradiated with reconstruction illumination light from the substrate D side at an angle of about 45°, and the hologram laminate was observed from the same side as the reconstruction illumination light at an observation angle of about 0°. At this time, only the reconstruction image of the relief hologram was observed. Next, the hologram laminate was irradiated with reconstruction illumination light from the substrate A side at an incident angle of about 45°, and the hologram laminate was observed from the same side as the reconstruction illumination light at an observation angle of about 0°. At this time, in addition to the reconstruction image of the relief hologram, the reconstruction image of the volume hologram was also observed. The hologram laminate was also held up to indoor lighting for observation. At this time, a human face drawn with a laser could be observed.

[0220] [Example 3] On the hologram laminate produced in Example 2, drawing was performed with a laser beam diameter of 80 μm to form an image of a human face having a light semi-transmitting portion and a light reflective portion.

[0221] [Rating 3] When the hologram laminate was observed in the same manner as in Evaluation 2, the same results as in Example 2 were obtained. [Explanation of symbols]

[0222] 1...Support 2...First adhesive layer 3 … Volume hologram layer 4 … 1st protective layer 5…Second adhesive layer 6 … Metal layer 6a … Light transmitting part 6b…Light reflecting part 6c … Light semi-transparent part 7...Second base material 8 … Relief hologram layer 9…Second protective layer 10 ... Hologram laminate 11...First base material 12 ... Primer layer 13 ... Laser coloring layer 14 ... Transparent sheet 15…Third adhesive layer 21 … Observer 22 … Light Source

Claims

1. A volume hologram layer; a metal layer disposed on one surface of the volume hologram layer and having a pattern of light transmitting portions and light reflecting portions; A hologram laminate having the area ratio of the patterned light transmitting portion is 0.5% or more and 50% or less, The hologram laminate is used so that an observer observes the hologram laminate from the metal layer side, a laser coloring layer having a patterned coloring portion, and a support, which are arranged on a surface of the volume hologram layer opposite to the metal layer, in this order from the volume hologram layer side; A hologram laminate, wherein the pattern of the patterned light transmitting portion and the pattern of the color generating portion of the laser color generating layer are the same.

2. The hologram laminate according to claim 1 , further comprising a relief hologram layer on the surface of the metal layer opposite to the volume hologram layer.

3. The hologram laminate according to claim 2 , wherein the metal layer is disposed on the relief hologram layer on the concave-convex side.

4. A card comprising the hologram laminate according to any one of claims 1 to 3.

5. A hologram transfer foil comprising the hologram laminate according to any one of claims 1 to 3.

6. A hologram label comprising the hologram laminate according to any one of claims 1 to 3.

7. A data page comprising a hologram laminate according to any one of claims 1 to 3.

8. A booklet comprising the data page according to claim 7.

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