WO2023054570A1

WO2023054570A1 - Holographic laminate

Info

Publication number: WO2023054570A1
Application number: PCT/JP2022/036399
Authority: WO
Inventors: 幸紘吉村; 翔山西
Original assignee: 大日本印刷株式会社
Priority date: 2021-09-30
Filing date: 2022-09-29
Publication date: 2023-04-06
Also published as: JP2023171743A; JP2023051508A

Abstract

The present disclosure provides a holographic laminate comprising a volume hologram layer, and a metal layer arranged on one side of the volume hologram layer and having a patterned light-transmitting section and a light-reflecting section.

Description

hologram laminate

The present disclosure relates to a hologram laminate.

A hologram is made by interfering two lights with the same wavelength (object light and reference light) and recording the wavefront of the object light as interference fringes on a photosensitive material. When this hologram is irradiated with light under the same conditions as the reference light used when recording the interference fringes, a diffraction phenomenon occurs due to the interference fringes, and the same wavefront as the original object light can be reproduced. Holograms are often used for security applications and the like because they have advantages such as a beautiful appearance and being relatively difficult to duplicate.

Holograms can be classified into several types according to the recording form of interference fringes, but typically they can be divided into relief holograms and volume holograms. A relief hologram is a hologram layer having a fine uneven pattern formed on its surface. On the other hand, in a volume hologram, interference fringes generated by light interference are three-dimensionally recorded in the thickness direction as fringes with different refractive indices. A volume hologram has an image recorded by a difference in refractive index of materials, and is therefore more difficult to replicate than a relief hologram.

Volume holograms can be mass-produced industrially using a hologram master. Therefore, the volume hologram itself can be used as a master plate, a photosensitive material for duplication is brought into close contact with the volume hologram, and a laser beam is irradiated from the photosensitive material side to enable duplication.

Therefore, holograms with excellent anti-counterfeiting effects are desired.

For example,

Patent Literatures

1 and 2 disclose a hologram laminate in which a volume hologram and a relief hologram are laminated in order to enhance the anti-counterfeiting effect.

However, in recent years, techniques for easily duplicating holograms have begun to spread, and it has been pointed out that simply using holograms alone is insufficient as an anti-counterfeiting measure.

JP-A-6-118864 JP-A-2002-278434

The present disclosure has been made in view of the above circumstances, and the main purpose thereof is to provide a hologram laminate that is excellent in anti-counterfeiting effect and design.

An 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 transmission portions and light reflection portions. .

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. In this case, the metal layer is preferably arranged on the uneven surface of the relief hologram layer.

In the hologram laminate of the present embodiment, an adhesive layer and a laser coloring layer having a patterned coloring portion are provided on the surface of the volume hologram layer opposite to the metal layer, in this order from the volume hologram layer side. , and a support.

Another embodiment of the present disclosure provides a hologram laminate having a relief hologram layer and a metal layer disposed on one side of the relief hologram layer and having dot-shaped light transmission portions and light reflection portions. do.

Another embodiment of the present disclosure is a hologram laminate having a relief hologram layer and a metal layer disposed on one side of the relief hologram layer and having patterned light semi-transmissive portions and light reflective portions. provide the body

The hologram laminate of the present embodiment preferably has a volume hologram layer on the surface of the metal layer opposite to the relief hologram layer.

Another embodiment of the present disclosure provides a card having the hologram laminate described above.

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

Another embodiment of the present disclosure provides a hologram label having the hologram laminate described above.

Another embodiment of the present disclosure provides a data page having the hologram laminate described above.

Other embodiments of the present disclosure provide brochures comprising the data pages described above.

According to the present disclosure, it is possible to provide a hologram laminate that is excellent in anti-counterfeiting effect and design, and that can be given variable information.

1 is a schematic cross-sectional view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view and a plan view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view and a plan view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view and a plan view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view and a plan view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view and a plan view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view and a plan view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view and a plan view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view and a plan view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view and a plan view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view and a plan view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view and a plan view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view and a plan view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view and a plan view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view and a plan view illustrating a hologram laminate in the present disclosure; FIG. 1 is a schematic cross-sectional view and a plan view illustrating a hologram laminate in the present disclosure; FIG. 1 is a photograph of a hologram laminate of Example 1. FIG.

Embodiments of the present disclosure will be described below with reference to the drawings and the like. However, the present disclosure can be embodied in many different modes and should not be construed as limited to the description of the embodiments exemplified below. In addition, in order to make the description clearer, the drawings may schematically show the width, thickness, shape, etc. of each part compared to the actual form, but this is only an example and limits the interpretation of the present disclosure. not something to do. In addition, in this specification and each figure, the same reference numerals may be given to the same elements as those described above with respect to the existing figures, and detailed description thereof may be omitted as appropriate.

In this specification, when expressing a mode of arranging another member on top of a certain member, when simply describing “above” or “below”, unless otherwise specified, 2 includes both cases in which another member is arranged directly above or directly below, and cases in which another member is arranged above or below a certain member via another member. In addition, in this specification, when expressing a mode in which another member is arranged on the surface of a certain member, unless otherwise specified, when simply described as “on the surface”, it means directly above, so as to contact the certain member, unless otherwise specified. Alternatively, it includes both the case of arranging another member directly below and the case of arranging another member above or below a certain member via another member.

In this specification, the term "sheet" also includes a member called "film".
The term "film" also includes members called "sheets".

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

A. Hologram Laminate The hologram laminate in the present disclosure has three embodiments. Hereinafter, each embodiment will be described separately.

I. First Embodiment A hologram laminate of the present 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.

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 includes a volume hologram layer 3 and a metal layer 6 disposed on one surface of the volume hologram layer 3 and having patterned light transmission portions 6a and light reflection portions 6b. ,have. In addition, the hologram laminate 10 may further have optional layers as necessary. In FIG. A layer 4, a second adhesive layer 5, a metal layer 6 and a second substrate 7 are arranged in order.

Here, in the present specification, the "pattern" in the patterned light-transmitting portion refers to characters, graphics, symbols, or a combination thereof, etc., as will be described later. In addition to simple graphics such as polygons, circles, ellipses, and stars, the graphics include stripes, grids, patterns, bar codes, two-dimensional codes, and the like.

2(a) and 2(b) are views when observing the hologram laminate shown in FIG. 1, and FIG. 1 is a plan view when observed from the side of . As shown in FIGS. 2A and 2B, when the light source 22 is arranged on the observer 21 side and the hologram laminate 10 is irradiated with light from the light source 22 at an angle other than a predetermined angle, the metal layer 6 is patterned. Since it has the light transmitting portion 6a and the light reflecting portion 6b, the predetermined pattern Ib formed by the light transmitting portion 6a can be observed by the contrast of the light in the light transmitting portion 6a and the light reflecting portion 6b. can be done. Specifically, the metal layer 6 has a light-transmitting portion 6a patterned with the number “1”, and when light is irradiated from the observer 21 side at an angle other than a predetermined angle, the light-transmitting portion 6a of the metal layer 6 A pattern Ib of the number "1" by portion 6a can be observed.

3(a) and 3(b) are views when observing the hologram laminate shown in FIG. 1, and FIG. 1 is a plan view when observed from the side of . As shown in FIG. 3A, when the light source 22 is placed on the side of the observer 21 and the hologram laminate 10 is irradiated with the reconstruction illumination light from the light source 22 at a predetermined angle, the interference recorded in the volume hologram layer 3 is detected. The image is reproduced by diffraction of light by the fringes. At this time, 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. A predetermined pattern Ib formed by the light-transmitting portion 6a can be observed due to the light-dark contrast in the light-transmitting portion 6a and the light-reflecting portion 6b of the metal layer 6. The image Ia reproduced in layer 3 can be observed. Specifically, the metal layer 6 has a pattern-shaped light transmission portion 6a of the number "1", and when the reproduction illumination light is irradiated from the observer 21 side at a predetermined angle, the light transmission portion of the metal layer 6 The pattern Ib of the number "1" by 6a can be observed, and the star image Ia reproduced by the volume hologram layer 3 can be observed in the light transmitting portion 6a of the metal layer 6. FIG.

Thus, in this embodiment, since the metal layer having the patterned light transmitting portions and the light reflecting portions is arranged, the predetermined pattern by the light transmitting portions of the metal layer can be observed at an angle other than the predetermined angle. On the other hand, at a predetermined angle, a reconstructed image of the volume hologram layer can be observed in the light-transmitting portions of the metal layer together with a predetermined pattern by the light-transmitting portions of the metal layer. Therefore, the existence of the volume hologram layer can be obscured, and the anti-counterfeiting effect can be improved. In addition, designability can be improved. Furthermore, for example, when forming a light transmitting portion in a metal layer by laser irradiation, variable information such as name, ID, serial number, bar code, two-dimensional code, etc. can be transmitted to each hologram laminate by the patterned light transmitting portion. , and the hologram laminate can be used as a variable information recording medium.

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 includes a volume hologram layer 3 and a metal layer 6 disposed on one side of the volume hologram layer 3 and having patterned light transmission portions 6a and light reflection portions 6b. , and a relief hologram layer 8 is arranged on the surface of the metal layer 6 opposite to the volume hologram layer 3 . Moreover, the hologram laminate 10 may further have optional layers as necessary. In FIG. A layer 4, a second adhesive layer 5, a metal layer 6, a relief hologram layer 8 and a second substrate 7 are arranged in order. Moreover, 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 addition, in the metal layer 6, not only the light reflecting portion 6b but also the light transmitting portion 6a can function as a reflecting layer.

5A and 5B are views when observing the hologram laminate shown in FIG. 4, and FIG. 1 is a plan view when observed from the side of . As shown in FIG. 5A, when the light source 22 is placed on the side of the observer 21 and the hologram laminate 10 is irradiated with the reconstruction illumination light from the light source 22 at an angle other than a predetermined angle, the relief hologram layer 8 is recorded. The image is reconstructed by the diffraction of light by the interference fringes that form. At this time, since the metal layer 6 has patterned light transmission portions 6a and light reflection portions 6b, as shown in FIG. A predetermined pattern Ib formed by the light transmitting portion 6a can be observed and an image Ic reproduced on the relief hologram layer 8 can be observed by the light and dark contrast. Specifically, the metal layer 6 has grid-like light transmission portions 6a, and when the reproduction illumination light is irradiated from the observer 21 side at an angle other than a predetermined angle, the light transmission portions 6a of the metal layer 6 The grating pattern Ib can be observed, and the image Ic of the character "A" reproduced on the relief hologram layer 8 can be observed.

FIGS. 6A and 6B are views when observing the hologram laminate shown in FIG. 4, and FIG. 1 is a plan view when observed from the side of . As shown in FIG. 6A, when the light source 22 is arranged on the side of the observer 21 and the hologram laminate 10 is irradiated with the reconstruction illumination light from the light source 22 at a predetermined angle, the interference recorded in the volume hologram layer 3 is detected. The image is reproduced by diffraction of light by the fringes. At this time, as described above, the metal layer 6 has the patterned light transmitting portions 6a and the light reflecting portions 6b, and light can be transmitted through the light transmitting portions 6a. As shown in FIG. 1, the predetermined pattern Ib formed by the light transmitting portion 6a can be observed due to the contrast of light in the light transmitting portion 6a and the light reflecting portion 6b of the metal layer 6, and the light transmission of the metal layer 6 can be observed. An image Ia reproduced by the volume hologram layer 3 can be observed in the portion 6a. Specifically, the metal layer 6 has a grid-like light transmission portion 6a, and when the reproduction illumination light is irradiated from the observer 21 side at a predetermined angle, the grid pattern of the light transmission portion 6a of the metal layer 6 is observed. Ib can be observed, and the star image Ia reproduced by the volume hologram layer 3 can be observed in the light transmitting portion 6a of the metal layer 6. FIG.

In this embodiment, when the relief hologram layer is arranged on the surface of the metal layer opposite to the volume hologram layer, at angles other than the predetermined angle, the relief hologram is formed together with the predetermined pattern by the light transmitting portion of the metal layer. A reconstructed image of the layer can be observed, while at a given angle a reconstructed image of the volume hologram layer can be observed in the light-transmitting parts of the metal layer with a given pattern due to the light-transmitting parts of the metal layer. Therefore, the presence of the volume hologram layer can be made more difficult to understand, and the anti-counterfeiting effect can be improved. Furthermore, designability can also be improved.

Each configuration of the hologram laminate of this embodiment will be described below.

1. Metal Layer The metal layer in this embodiment is arranged on one surface of the volume hologram layer and has a patterned light transmitting portion and light reflecting portion.

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. Since the spectral transmittance of the specific wavelength in the light transmission portion is within the above range, when the hologram laminate is irradiated with reconstruction illumination light at a predetermined angle, a reproduced image of the volume hologram layer is observed in the light transmission portion of the metal layer. can be made easier.
It is also possible to make it easier to observe the pattern of the light-transmitting portions of the metal layer.

Here, the specific wavelength is the reproduction wavelength of the volume hologram layer, which is part of the visible light region.

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. rate. For example, in a laminate having a second base material and a metal layer, or a laminate having a second base material, a relief hologram layer and a metal layer in this order, in the region where the light transmitting portion of the metal layer is arranged It is the spectral transmittance of a specific wavelength.

The metal layer may have a patterned light-transmitting portion, and in the metal layer, the light-transmitting portion may be arranged in a pattern as a whole, or may be locally arranged in a pattern. good. For example, FIGS. 5A and 5B show an example in which the light transmitting portions 6a are arranged in a pattern on the metal layer 6 as a whole, and FIGS. This is an example in which the transmissive portions 6a are locally arranged in a pattern.

The ratio of the total area of the patterned light-transmitting portions to the area of the metal layer, that is, the area ratio of the patterned light-transmitting portions varies depending on the pattern shape of the light-transmitting portions, but is, for example, 0.5%. 50% or more, may be 1% or more and 30% or less, or may be 5% or more and 25% or less. If the area ratio of the light transmitting portion is too small, it may become difficult to observe the reproduced image of the volume hologram layer in the light transmitting portion. In addition, if the area ratio of the light transmitting portion is too large, the presence of the volume hologram layer may become easily recognizable.

The pattern shape of the light-transmitting portion in a 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. mentioned. In addition to simple graphics such as polygons, circles, ellipses, and stars, the graphics include stripes, grids, patterns, bar codes, two-dimensional codes, and the like.

For example, in the case where the light-transmitting portions are arranged in a stripe shape or a grid shape on the whole in the metal layer, the volume hologram layer can be formed in the entire metal layer through the light-transmission portions such as the stripe shape or the grid shape. A reconstructed image can be observed. Further, for example, when light-transmitting portions of patterns such as letters, figures, and symbols are locally arranged in the metal layer, the light-transmitting portions of patterns such as letters, figures, and symbols can be seen through the metal layer. A reproduced image of the volume hologram layer can be observed in part.

In addition, variable information such as name, ID, serial number, bar code, two-dimensional code, etc. can be given to each hologram laminate by the light transmission part, and the hologram laminate can be used as a variable information recording medium. can be done.

In addition, 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 according to the pattern shape of the light-transmitting portion.

For example, when the light-transmitting part has a stripe shape or a lattice shape, the line width of the light-transmitting part may be 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 become difficult to observe the reproduced image of the volume hologram layer in the light-transmitting portion, or it may become difficult to observe the pattern of the light-transmitting portion. Also, if the line width of the light transmitting portion is too large, the existence of the volume hologram layer may become easily recognizable.

Further, for example, when the light-transmitting part has a stripe shape or a lattice shape, the stripe pitch or the lattice interval may be 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. good. If the pitch of the stripes or the interval of the lattice is too small, it may become difficult to observe the pattern of the light-transmitting portions, or it may become difficult to form the pattern of the light-transmitting portions. Also, if the stripe pitch or the lattice interval is too large, it may be difficult to observe the reproduced image of the volume hologram layer in the light transmitting portion.

The dimensions of the light transmitting portion can be measured by observing the surface of the hologram laminate with an optical microscope, laser microscope, or the like.

The material of the metal layer is particularly limited as long as it is a metal material that can form a light transmitting portion in the metal layer by oxidizing the surface of the metal layer or removing the metal layer by laser irradiation. not to be Among them, it is preferable that the material of the metal layer is a metal material that can be altered such as by oxidation of the surface of the metal layer by laser irradiation. Examples include aluminum, zinc, indium, tin, and titanium. Among them, aluminum is preferable. As described above, the metal layer can function as a reflective layer arranged on the uneven structure side of the relief hologram layer, and an aluminum film is commonly used.

When the light transmitting portion is formed in the metal layer by oxidizing or otherwise altering the metal layer surface, the light transmitting portion is a portion where the metal layer surface is oxidized or otherwise altered. In this case, the light-transmitting part can have reflectivity, like the light-reflecting part.

The thickness of the metal layer is, for example, 5 nm or more and 1 μm or less, and may be 10 nm or more and 100 nm or less. If the thickness of the metal layer is too thin, depending on the material of the metal layer, the spectral transmittance of a specific wavelength in the light reflecting portion of the metal layer may increase, making it easier to recognize the presence of the volume hologram layer. Also, if the thickness of the metal layer is too thick, it may become difficult to form the light transmitting portion.

As a method of forming the metal layer, for example, there is a method of forming a metal layer on one surface of the second base material and then forming a light-transmitting portion on the metal layer by laser irradiation. Examples of the method for forming the metal layer on one surface of the second base material include a vacuum deposition method and a sputtering method.
Moreover, as a method of forming a light-transmitting portion in a metal layer by laser irradiation, a general laser marking method for a metal layer can be applied.

As will be described later, when the support is arranged on the surface of the volume hologram layer opposite to the metal layer, the metal layer may be arranged on the entire one surface of the support. It may be arranged on a part of one surface.

Further, as will be described later, when the relief hologram layer is arranged on the surface of the metal layer opposite to the volume hologram layer, the metal layer serves as a reflective layer arranged on the surface of the relief hologram layer on the concave-convex structure side. can serve as

2. Volume Hologram Layer In this embodiment, interference fringes are recorded in the volume hologram layer, and light is diffracted by the interference fringes to reproduce an image.

In this embodiment, the volume hologram layer is usually a reflective volume hologram layer, a so-called Lippmann hologram. A reflective volume hologram layer is a volume hologram layer from which an image can be reproduced by irradiating the surface of the volume hologram layer on the viewer side with reproduction illumination light. In this embodiment, the reproduced image can be observed by observing from the metal layer side of the hologram laminate and irradiating the reconstruction illumination light from the metal layer side of the hologram laminate.

The image reproduced by the interference fringes recorded in the volume hologram layer is not particularly limited and can be designed as appropriate.

The volume hologram layer may be transparent, translucent, or opaque.

The material used for the volume hologram layer can be the same as the material used for general volume hologram layers. For example, thermosetting resin, curable resin such as ionizing radiation curable resin; thermoplastic resin; silver salt material, gelatin dichromate emulsion, photopolymerizable resin, photocrosslinkable resin, photoresist, photorefractive material, photochromic photosensitive materials such as materials;

The volume hologram layer may contain additives as necessary. Additives may be the same as those used in general volume hologram layers. Examples thereof include sensitizing dyes, fine particles, thermal polymerization inhibitors, silane coupling agents, plasticizers, colorants, and binder resins.

Materials used for the volume hologram layer include, among others, a binder resin, a photopolymerizable compound, a photosensitive material containing a photopolymerization initiator and a sensitizing dye, a cationically polymerizable compound, a radically polymerizable compound, and a photoradical polymerization initiator. and a photocationic polymerization initiator can be suitably used.

As will be described later, when the support is arranged on the surface of the volume hologram layer opposite to the metal layer, the volume hologram layer may be arranged on the entire one surface of the support. may be arranged on a part of one surface of the

The volume hologram layer is arranged so as to overlap with the metal layer in plan view. Specifically, the image reproduced by the interference fringes recorded in the volume hologram layer is arranged so as to overlap the light transmitting portion of the metal layer in plan view. As a result, when observing from the metal layer side of the hologram laminate, the presence of the volume hologram layer can be obscured by the metal layer, and the reproduced image of the volume hologram layer can be observed in the light transmitting portion of the metal layer. It is possible to improve the anti-counterfeiting effect.

The phrase "the volume hologram layer is arranged so as to overlap the metal layer in plan view" means that at least a portion of the volume hologram layer overlaps the metal layer in plan view. Further, the fact that the image reproduced by the interference fringes recorded in the volume hologram layer is arranged so as to overlap the light-transmitting portion of the metal layer in plan view means that the image reproduced by the interference fringes recorded in the volume hologram layer is arranged. It means that at least part of the image of the metal layer overlaps the light-transmitting portion of the metal layer in a plan view.

Further, as will be described later, when the relief hologram layer is arranged on the surface of the metal layer opposite to the volume hologram layer, the volume hologram layer may be arranged so as to overlap the relief hologram layer in plan view. Alternatively, it may be arranged so as not to overlap with the relief hologram layer in plan view.

When the volume hologram layer is arranged so as to overlap the relief hologram layer in plan view, specifically, an image reproduced by the interference fringes recorded in the volume hologram layer is recorded in the relief hologram layer. It is arranged so as to overlap with the image reproduced by the interference fringes obtained when viewed from above. Thereby, when the hologram laminate is observed from the relief hologram layer side, the presence of the volume hologram layer can be obscured by the relief hologram layer, and the forgery prevention effect can be improved.

Further, when the volume hologram layer is arranged so as not to overlap the relief hologram layer in plan view, specifically, the image reproduced by the interference fringes recorded in the volume hologram layer is the relief hologram layer. are arranged so as not to overlap the image reproduced by the interference fringes recorded in the plane view. In this case, one image may be formed by combining the reproduced image of the volume hologram layer and the reproduced image of the relief hologram layer. An integrated design can be formed by the reproduced image of the volume hologram layer and the reproduced image of the relief hologram layer.

The phrase "the volume hologram layer is arranged so as to overlap the relief hologram layer in plan view" means that at least a portion of the volume hologram layer overlaps the relief hologram layer in plan view. Further, the fact that the image reproduced by the interference fringes recorded in the volume hologram layer is arranged so as to overlap the image reproduced by the interference fringes recorded in the relief hologram layer in plan view means that the volume hologram layer It means that at least a part of the image reproduced by the recorded interference fringes overlaps the image reproduced by the interference fringes recorded in the relief hologram layer in plan view.

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

As a method for forming the volume hologram layer, for example, there is a method in which object light and reference light having the same wavelength are caused to interfere with each other to record interference fringes in the volume hologram formation layer containing the above materials. Specifically, as a method for forming the reflective volume hologram layer, there is a method in which object light is incident from one surface of the volume hologram forming layer and reference light is incident from the other surface to record interference fringes. .

3. Relief Hologram Layer In this embodiment, the relief hologram layer has an uneven structure corresponding to interference fringes on its surface.

In this embodiment, when observing the pattern of the light-transmitting portion of the metal layer and the reproduced image of the volume hologram layer, a light source is arranged on the surface of the hologram laminate on the relief hologram layer side, and light is emitted from the surface on the relief hologram layer side. From observation, 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 according to the application of the hologram laminate.

The image reproduced by the interference fringes recorded in the relief hologram layer is not particularly limited and can be designed as appropriate.

The material used for the relief hologram layer can be the same as the material used for general relief hologram layers. For example, curable resins such as thermosetting resins and ionizing radiation curable resins; thermoplastic resins; silver salt materials, gelatin bichromate emulsions, diazo-based photosensitive materials, photoresists, ferroelectrics, photochromic materials, thermochromic materials , photosensitive materials such as chalcogen glass;

The relief hologram layer may contain additives as necessary. Additives may be the same as those used in general relief hologram layers.

The shape and the like of the uneven structure of the relief hologram layer may be any shape that allows expression of a desired reproduced image, and can be appropriately determined in the same manner as the uneven structure of a general relief hologram layer.

In the relief hologram layer, a reflective layer is usually arranged on the uneven structure side of the relief hologram layer. By arranging the reflective layer on the surface of the relief hologram layer on the uneven structure side, the reflection and diffraction efficiency of the uneven structure can be enhanced, and a high-brightness reproduced image of the relief hologram layer can be expressed. As for the reflective layer, the metal layer may also serve as the reflective layer, and a transparent reflective layer may be arranged on the uneven structure side of the relief hologram layer separately from the metal layer. The transparent reflective layer will be described later.

Further, in this embodiment, observation is made from the surface of the hologram laminate on the metal layer side, that is, the surface on the relief hologram layer side. It is arranged so that the opposite side faces the observer and the light source.

The thickness of the relief hologram layer is not particularly limited as long as it is thick enough to form a concave-convex structure corresponding to desired interference fringes. is set as appropriate. The specific thickness of the relief hologram layer can be the same as the thickness of a general relief hologram layer.

Examples of methods for forming the relief hologram layer include the embossing method and the 2P method.

4. Arbitrary Configuration The hologram laminate of the present embodiment may have any arbitrary configuration in addition to the volume hologram layer, metal layer, and relief hologram layer described above. The arbitrary configuration is not particularly limited, and a configuration having a desired function can be used according to the application and manufacturing method of the hologram laminate of this embodiment. Optional structures include, for example, 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, a separator, and the like are included.

For example, as shown in FIG. 1, 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, a second adhesive layer 5, a metal layer 6, and a second substrate 7 in this order, and arranging the volume hologram transfer foil and the metal label on one side of the support 1 in this order, in the hologram laminate 10, 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 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.

Also, as shown in FIG. 7A, for example, 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, a second adhesive layer 5, and a metal layer 6 and the second protective layer 9 in this order, and when the volume hologram transfer foil and the metal transfer foil are arranged in this order on one surface of the support 1, in the hologram laminate 10, 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 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.

Further, for example, as shown in FIG. 7B, 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 second adhesive layer 5 and a metal layer 6 When a metal label having a second substrate 7 is used in this order, and a volume hologram label and a metal label are arranged in this order on one surface of the support 1, in the hologram laminate 10, the support 1, the first adhesion Layer 2, volume hologram layer 3, first substrate 11, second adhesive layer 5, metal layer 6 and second substrate 7 may be arranged in this order. 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.

Alternatively, for example, as shown in FIG. 7C, a volume hologram sheet having a first adhesive layer 2, a volume hologram layer 3, and a first base material 11 in this order, a second adhesive layer 5, and a metal layer 6 A volume hologram is applied to one surface of the support 1 using a metal label having 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. When a sheet is placed and a metal label or a metal transfer foil is placed on the surface of the volume hologram sheet opposite to the support 1 via the transparent sheet 14, the hologram laminate 10 includes the support 1 and 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 are arranged in this order. may be 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.

Further, for example, as shown in FIG. 4, 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, a second adhesive layer 5, a metal layer 6, and a relief hologram When using a relief hologram label having the layer 8 and the second base material 7 in this order and arranging the volume hologram transfer foil and the relief hologram label on one surface of the support 1 in this order, in the hologram laminate 10, the support Body 1, first adhesive layer 2, volume hologram layer 3, first protective layer 4, second adhesive layer 5, metal layer 6, relief hologram layer 8 and second substrate 7 may be arranged in this order. 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.

Also, as shown in FIG. 8A, for example, 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, a second adhesive layer 5, and a metal layer 6 When using a relief hologram transfer foil having a relief hologram layer 8 and a second protective layer 9 in this order, and arranging the volume hologram transfer foil and the relief hologram transfer foil in this order on one surface of the support 1, the hologram lamination In the body 10, 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 are arranged in this order. may be 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.

Further, for example, as shown in FIG. 8B, 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 second adhesive layer 5 and a metal layer 6 When using a relief hologram label having a relief hologram layer 8 and a second base material 7 in this order and arranging a volume hologram label and a relief hologram label in this order on one surface of the support 1, in the hologram laminate 10, Support 1, first adhesive layer 2, volume hologram layer 3, first substrate 11, second adhesive layer 5, metal layer 6, relief hologram layer 8 and second substrate 7 may be arranged in this order. . 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.

Alternatively, for example, as shown in FIG. 8C, a volume hologram sheet having a first adhesive layer 2, a volume hologram layer 3, and a first base material 11 in this order, a second adhesive layer 5, and a metal layer 6 A relief hologram label having a relief hologram layer 8 and a second substrate 7 in this order or 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 is used. When a volume hologram sheet is arranged on one surface of the support 1 and a relief hologram label or a relief hologram transfer foil is arranged on the surface of the volume hologram sheet opposite to the support 1 with the transparent sheet 14 interposed therebetween, In the hologram laminate 10, 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 relief hologram layer. 8 and the second base material 7 or the 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.

Further, for example, as shown in FIG. 9A, when the metal layer 6 and the volume hologram layer 3 are arranged in order on one surface of the second base material 7, in the hologram laminate 10, the second base material 7, the metal Layer 6, primer layer 12, volume hologram layer 3, and first adhesive layer 2 may be arranged in this order. 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.

Further, for example, as shown in FIG. 9B, when the relief hologram layer 8, the metal layer 6 and the volume hologram layer 3 are arranged in order on one surface of the second substrate 7, the hologram laminate 10 includes the second The 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 this case, the hologram laminate 10 can be used as, for example, a hologram transfer foil, a hologram label, or an embedding hologram sheet.

An arbitrary configuration will be described below.

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

When the hologram laminate of this embodiment is used as a card, the support is a member that serves as the base of the card and is a core sheet. Examples of core sheets include resin sheets such as polyethylene terephthalate (PET), amorphous polyethylene terephthalate (PET-G), polyvinyl chloride (PVC), and polycarbonate (PC). The core sheet may be composed of, for example, a resin sheet, and a colored layer may be arranged on one side of the resin sheet. The outline of the core sheet is the same as the outline of the card.

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

(2) First base material and second base material In this embodiment, the first base material is a member that supports the volume hologram layer in the volume hologram label when the hologram laminate is produced using the volume hologram label. be. The second substrate is a member that supports the metal layer or the relief hologram layer in the metal label or the relief hologram label when the hologram laminate is produced using the metal label or the relief hologram label. The second substrate may also 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.

The first base material and the second base material are not particularly limited as long as they can support the volume hologram layer, the metal layer, and the relief hologram layer, and can be appropriately selected according to the application of the hologram laminate. can be used.

A resin film can be used as the first base material and the second base material. Examples of resins constituting the resin film include polyester resins such as polyethylene terephthalate, polycarbonates, acrylic resins, cycloolefin resins, polystyrene resins, and acrylic styrene resins.

The thicknesses of the first base material and the second base material are appropriately selected according to the application, type, etc. of the hologram laminate, and are, for example, 2 μm or more and 200 μm or less, preferably 10 μm or more and 50 μm or less. is.

The first base material and the second base material may be subjected to surface treatment for the purpose of enhancing adhesion with the volume hologram layer, metal layer, and relief hologram layer. Examples of surface treatment include corona treatment, ozone treatment, plasma treatment, ionizing radiation treatment, dichromic acid treatment, anchor or primer treatment, and the like. Examples of the primer agent include various primer agents such as urethane-based, acrylic, ethylene-vinyl acetate copolymer, and vinyl chloride-vinyl acetate copolymer-based primers.

(3) First protective layer and second protective layer In the present embodiment, the first protective layer is a member that protects the volume hologram layer, and when a hologram laminate is produced using a volume hologram transfer foil, It maintains the physical strength and the like of the volume hologram layer. Further, the second protective layer is a member for protecting the metal layer and the relief hologram layer, and when the hologram laminate is manufactured using the metal transfer foil and the relief hologram transfer foil, the transferred metal layer and the relief hologram layer are protected. It maintains physical strength and the like.

Examples of materials used for the first protective layer and the second protective layer include acrylic resins, vinyl chloride-vinyl acetate copolymers, polyester resins, polymethacrylate resins, polyvinyl chloride resins, cellulose resins, silicone resins, One or a mixture of two or more selected from the group consisting of chlorinated rubber, casein, various surfactants, metal oxides, ionizing radiation curable resins that react to ultraviolet rays, electron beams, etc., thermosetting Resins, thermoplastic resins, and the like can be mentioned.

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.

(4) First Adhesive Layer and Second Adhesive Layer In the present embodiment, when a hologram laminate is produced using a volume hologram transfer foil or a volume hologram label, the first adhesive layer is used to bond the volume hologram layer and the support. It is a member for bonding. In the case where the first adhesive layer is formed on one surface of the second base material in order, such as a relief hologram layer, a metal layer, and a volume hologram layer, the laminate composed of these layers is used as the support. It may be a member for adhering to. The second adhesive layer bonds the metal layer or the relief hologram layer to the volume hologram layer when the hologram laminate is produced using the metal transfer foil or metal label, or the relief hologram transfer foil or relief hologram label. It is a member for

When manufacturing a hologram laminate using a volume hologram transfer foil, a metal transfer foil, or a relief hologram transfer foil, a heat sealing agent is used as the adhesive constituting the first adhesive layer and the second adhesive layer.

The heat sealant contains a thermoplastic resin. The thermoplastic resin is not particularly limited, and is appropriately selected according to the type of member to be adhered. Examples of thermoplastic resins include maleic acid-modified vinyl chloride-vinyl acetate copolymer, ethylene-vinyl acetate copolymer, vinyl chloride-vinyl acetate copolymer, polyamide resin, polyester resin, polyethylene resin, 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 copolymer, ethylene-(meth)acrylic acid ester copolymer, polymethyl methacrylate resin, cellulose resin, polyvinyl ether resin, polyurethane resin, polycarbonate resin, polypropylene resin, epoxy resin, phenolic resin, vinyl resin 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 copolymer (SEBS), styrene ethylene propylene styrene block copolymer (SEPS) and the like. The thermoplastic resin may be used singly or in combination of two or more.

The heat sealing agent may contain additives. Examples of additives include dispersants, fillers, plasticizers, antistatic agents, and the like.

When manufacturing a hologram laminate using a volume hologram transfer foil, a metal transfer foil, or a relief hologram transfer foil, the thicknesses of the first adhesive layer and the second adhesive layer are not particularly limited. For example, the thickness is preferably 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.
Also, if the thicknesses of the first adhesive layer and the second adhesive layer are too thick, the heating temperature during transfer will be too high, and other members may be damaged.

When a heat sealing agent 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 multiple layers. In the case of multiple layers, layers having the same composition may be laminated, or layers having different compositions may be laminated.

When manufacturing a hologram laminate using a volume hologram label, a metal label, or a relief hologram label, examples of adhesives constituting the first adhesive layer and the second adhesive layer include heat sealing agents and pressure-sensitive adhesives. is mentioned.

The heat sealing agent has been described above, so the explanation here is omitted.

Examples of pressure-sensitive adhesives include acrylic adhesives, rubber-based adhesives, silicone-based adhesives, urethane-based adhesives, and polyester-based adhesives. Among them, it is preferable to use an acrylic pressure-sensitive adhesive which is excellent in durability and adhesiveness and low in cost. Also, the pressure-sensitive adhesive may be a solvent-type adhesive or a non-solvent-type adhesive. A photosensitive adhesive can be used as the solventless adhesive.

　Acrylic pressure-sensitive adhesives are based on acrylic resins, and if necessary, cross-linking agents, tackifiers, etc. are added.

Various additives such as antioxidants and UV absorbers may be added to the pressure-sensitive adhesive within a range that does not impair its performance. Moreover, when using a photosensitive adhesive that is cured by irradiation with ultraviolet light or visible light, a polymerization initiator is added. When using a photosensitive adhesive that is cured by electron beam irradiation, no polymerization initiator is added.

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, preferably 5 μm or more and 100 μm. It is below.

(5) Laser coloring layer In this embodiment, for example, as shown in FIGS. 10(a) and 10(b), laser coloring having a patterned coloring portion 12a between the support 1 and the volume hologram layer 3. A layer 13 may be arranged. The laser coloring layer is a member that develops color by laser irradiation, and has a patterned coloring portion. When forming the light-transmitting portion in the metal layer by laser irradiation, the 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 color-developing portion of the laser coloring layer are the same. pattern visibility can be enhanced. In addition, since the metal layer tends to become brittle due to the heat generated by the laser irradiation, when the volume hologram layer is peeled off from the support, the metal layer tends to undergo cohesive failure, or the metal layer and the primer layer separate. The volume hologram layer and the laser coloring layer remain on the support side. Therefore, the anti-counterfeiting effect can be improved.

The laser coloring layer can contain a binder resin and a laser coloring agent.

Examples of binder resins include polyolefin resins, vinyl resins, polyester resins, polyamide resins, acrylic resins, and phenol resins.

Examples of laser coloring agents include coloring agents such as dyes and pigments, and clays.

In addition, the laser coloring layer may contain additives as necessary.

The thickness of the laser coloring layer is, for example, 0.2 μm or more and 200 μm or less, may be 1 μm or more and 150 μm or less, or may be 20 μm or more and 100 μm or less.

A method for forming the laser coloring layer includes, for example, a method of coating a resin composition containing a binder resin and a laser coloring agent on one side of a support. Moreover, laser irradiation is mentioned as a method of forming a coloring part in a laser coloring layer. In this embodiment, by laser irradiation, it is possible to form a light-transmitting portion in the metal layer and at the same time form a coloring portion in the laser coloring layer.

(6) Transparent Reflective Layer In this embodiment, a transparent reflective layer may be disposed between the metal layer and the relief hologram layer and on the surface of the relief hologram layer facing the concave-convex structure.

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, etc. can be used.

5. Usage of Hologram Laminate The hologram laminate of the present embodiment may be used, for example, as an information recording medium such as a card, or may be used as a hologram transfer foil, a hologram label, or an embedding hologram sheet. Hologram stacks can also be used for data pages. Cards, hologram transfer foils, hologram labels, and data pages will be described later.

6. Method for manufacturing hologram laminate The method for manufacturing the hologram laminate of the present embodiment is not particularly limited as long as it is a method capable of manufacturing the above-described hologram laminate, and is a general method for manufacturing a hologram laminate. can be the same as

For example, using a volume hologram transfer foil or a volume hologram label and a metal transfer foil or a metal label, after attaching the volume hologram transfer foil or the volume hologram label on the support, the metal is placed on the volume hologram transfer foil or the volume hologram label. A transfer foil or metal label may be applied. Alternatively, for example, using a volume hologram transfer foil or a volume hologram label and a relief hologram transfer foil or a relief hologram label, after attaching the volume hologram transfer foil or the volume hologram label to a support, the volume hologram transfer foil or the volume hologram A relief hologram transfer foil or a relief hologram label may be attached on the label.

Also, layers such as a relief hologram layer, a metal layer, and a volume hologram layer may be formed in order on the second base material.

Alternatively, for example, a volume hologram layer, a metal layer, and a relief hologram layer may be arranged on a support to obtain a layered product, and then the layered product may be irradiated with a laser 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 pasted onto the support. .

II. Second Embodiment A hologram laminate of this embodiment has a relief hologram layer and a metal layer disposed on one side of the relief hologram layer and having dot-shaped light transmitting portions and light reflecting portions.

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 includes a relief hologram layer 8 and a metal layer 6 arranged on one side of the relief hologram layer 8 and having dot-shaped light transmitting portions 6a and light reflecting portions 6b. ,have. Moreover, the hologram laminate 10 may further have optional layers as necessary. In FIG. , and the second base material 7 are arranged in this order. Moreover, 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 addition, in the metal layer 6, not only the light reflecting portion 6b but also the light transmitting portion 6a can function as a reflecting layer.

12(a) and (b) are views when observing the hologram laminate shown in FIG. 1 is a plan view when observed from the side of . As shown in FIGS. 12A and 12B, when the light source 22 is placed on the observer 21 side and the hologram laminate 10 is irradiated with the reconstruction illumination light from the light source 22, the interference recorded in the relief hologram layer 8 The image Ic is reproduced by diffraction of light by the fringes. Specifically, when the observer 21 irradiates the reproduction illumination light, the image Ic of the letter “A” reproduced on the relief hologram layer 8 can be observed. At this time, as shown in FIG. 13C, which will be described later, since the metal layer 6 has fine dot-shaped light transmission portions 6a, even if light is irradiated from the observer 21 side, fine dot-shaped light transmission portions 6a are formed. The pattern formed by the light transmitting portion 6a cannot be visually observed.

FIGS. 13A to 13C are views when observing the hologram laminate shown in FIG. 11, and FIG. 13B shows the second substrate 7 side of the hologram laminate 10 in FIG. 13(c) is an enlarged view of part A in FIG. 13(b). As shown in FIGS. 13A to 13C, a light source 22 is arranged on the side opposite to the observer 21, and when the hologram laminate 10 is irradiated with light from the light source 22, the light transmitting portion 6a of the metal layer 6 is illuminated. A predetermined pattern Ib formed by the fine dot-like light transmitting portions 6a can be observed by the transmitted light. Specifically, when light is irradiated from the side opposite to the observer 21, the pattern Ib of the numeral "1" formed by the fine dot-like light transmitting portions 6a of the metal layer 6 can be observed.

As described above, in the present embodiment, since the metal layer having the fine dot-like light transmitting portion and the light reflecting portion is arranged, the fine dot-like shape of the metal layer can be seen through the hologram laminate. A pattern due to the light transmitting portion can be observed. Therefore, when light is irradiated from the observer's side, the reproduced image of the relief hologram layer can be observed, while when light is irradiated from the side opposite to the observer, fine dot-like light of the metal layer can be observed. A pattern due to the transmission portion can be observed. Therefore, the relief hologram layer can obscure the presence of the dot-shaped light transmitting portions of the metal layer, thereby improving the anti-counterfeiting effect. In addition, designability can be improved. Furthermore, for example, when a light transmitting portion is formed in a metal layer by laser irradiation, variable information such as name, ID, serial number, bar code, two-dimensional code, etc. can be hologram-layered by the fine dot-shaped light transmitting portion. It can be applied to each body, and the hologram laminate can be used as a variable information recording medium.

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 includes a volume hologram layer 3 and a metal layer 6 disposed on one side of the volume hologram layer 3 and having patterned light transmission portions 6a and light reflection portions 6b. ,have. Moreover, the hologram laminate 10 may further have optional layers as necessary. In FIG. A layer 4, a second adhesive layer 5, a metal layer 6, a relief hologram layer 8 and a second substrate 7 are arranged in order. Moreover, 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.

FIGS. 15A and 15B are diagrams when the hologram laminate shown in FIG. 14 is observed, and FIG. 1 is a plan view when observed from the side of . As shown in FIGS. 15A and 15B, when the light source 22 is placed on the observer 21 side and the hologram laminate 10 is irradiated with the reconstruction illumination light from the light source 22, interference recorded in the relief hologram layer 8 is detected. The image Ic is reproduced by diffraction of light by the fringes. Specifically, when the observer 21 irradiates the reproduction illumination light, the image Ic of the letter “A” reproduced on the relief hologram layer 8 can be observed. At this time, as shown in FIG. 16C, which will be described later, since the metal layer 6 has fine dot-shaped light transmission portions 6a, even if light is irradiated from the observer 21 side, fine dot-shaped light transmission portions 6a are formed. The pattern formed by the light transmitting portion 6a cannot be visually observed.

FIGS. 16A to 16C are diagrams when the hologram laminate shown in FIG. 14 is observed, and FIG. 16B shows the second substrate 7 side of the hologram laminate 10 in FIG. 16(c) is an enlarged view of part A in FIG. 16(b). As shown in FIGS. 16A to 16C, a light source 22 is arranged on the side opposite to the observer 21, and when the hologram laminate 10 is irradiated with light from the light source 22, the light transmitting portion 6a of the metal layer 6 is illuminated. A predetermined pattern Ib formed by the fine dot-like light transmitting portions 6a can be observed by the transmitted light. Specifically, when light is irradiated from the side opposite to the observer 21, the pattern Ib of the numeral "1" formed by the fine dot-like light transmitting portions 6a of the metal layer 6 can be observed.

17(a) and (b) are diagrams when the hologram laminate shown in FIG. 14 is observed. 1 is a plan view when observed from . As shown in FIGS. 17A and 17B, a light source 22 is placed on the side of an observer 21, and when the hologram laminate 10 is irradiated with reconstruction illumination light from the light source 22 at a predetermined angle, the volume hologram layer 3 records. The image Ia is reproduced by the diffraction of light by the interference fringes that are formed.
Specifically, when the observer 21 irradiates the reproduction illumination light, the star image Ia reproduced on the volume hologram layer 3 can be observed. At this time, as shown in FIG. 16C, the metal layer 6 has fine dot-shaped light transmission portions 6a. The pattern formed by the light transmitting portion 6a cannot be visually observed.

In this embodiment, when the volume hologram layer is arranged on the surface of the metal layer opposite to the relief hologram layer, the reproduced image of the volume hologram layer is observed at the light transmitting portion of the reflective layer at a predetermined angle. When observed from the relief hologram layer side, a reproduced image of the relief hologram layer can be observed, while when observed from the volume hologram layer side, a reproduced image of the volume hologram layer can be observed, and When observed through the hologram laminate, a pattern of fine dot-like light transmitting portions of the metal layer can be observed. Therefore, the anti-counterfeiting effect can be improved. Furthermore, designability can also be improved.

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

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

1. Metal Layer The metal layer in this embodiment is arranged on one surface of the volume hologram layer and has dot-shaped light transmitting portions and light reflecting portions.

The metal layer only needs to have a dot-shaped light transmission portion, and the dots may be dots generated by halftone processing or dots generated by an error diffusion method, for example.
In the case of halftone dot processing, gradation can be expressed by the size of dots, and the density of dots is constant. On the other hand, in the case of the error diffusion method, the gradation can be expressed by the dot density, and the size of the dots is constant.

The size of the dots is, for example, 5 μm or more and 400 μm or less, may be 10 μm or more and 200 μm or less, or may be 20 μm or more and 150 μm or less. If the size of the dots is too small, it may become difficult to observe the pattern of the dot-shaped light-transmitting portions. Also, if the size of the dot is too large, the existence of the light transmitting portion may become easily recognizable.

Further, the ratio of the total area of the dot-shaped light-transmitting portions to the area of the metal layer, that is, the area ratio of the dot-shaped light-transmitting portions is, for example, 0.5% or more and 50% or less, and 1% or more and 30%. It may be less than or equal to 5% or more and 25% or less. If the area ratio of the light-transmitting portions is too small, it may become difficult to observe the pattern of the dot-shaped light-transmitting portions. Moreover, if the area ratio of the light transmitting portion is too large, the existence of the light transmitting portion may become easily recognizable.

Examples of the pattern represented by the dot-shaped light-transmitting portions include patterns such as characters, figures, symbols, or combinations thereof, and patterns of photographs such as portraits and landscape photographs.

In addition, variable information such as name, ID, photograph of the face, serial number, bar code, two-dimensional code, etc., can be given to each hologram laminate by the pattern represented by the dot-shaped light-transmitting portions. A laminate can be used as a variable information recording medium.

The material, thickness, formation method, arrangement, etc. of the metal layer can be the same as in the first embodiment.

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

Other points of the support can be the same as in the first embodiment.

III. Third Embodiment A 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 patterned light semitransmissive portions and light reflective portions.

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 includes a relief hologram layer 8 and a metal layer 6 disposed on one side of the relief hologram layer 8 and having patterned light semitransmissive portions 6c and light reflecting portions 6b. and have Moreover, the hologram laminate 10 may further have optional layers as necessary. In FIG. , and the second base material 7 are arranged in this order. Moreover, 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 addition, in the metal layer 6, not only the light reflecting portion 6b but also the light semi-transmitting portion 6c can function as a reflecting layer.

19(a) and (b) are views when observing the hologram laminate shown in FIG. 1 is a plan view when observed from the side of . As shown in FIGS. 19A and 19B, when the light source 22 is placed on the side of the observer 21 and the hologram laminate 10 is irradiated with the reconstruction illumination light from the light source 22, the interference recorded in the relief hologram layer 8 The image Ic is reproduced by diffraction of light by the fringes. Specifically, when the observer 21 irradiates the reproduction illumination light, the image Ic of the letter “A” reproduced on the relief hologram layer 8 can be observed. At this time, the metal layer 6 has patterned light semi-transmitting portions 6c and light reflecting portions 6b. Even if light is irradiated, the pattern formed by the patterned light semitransmissive portions 6c cannot be visually observed.

20(a) and (b) are views when observing the hologram laminate shown in FIG. 18, and FIG. 1 is a plan view when observed from the side of . As shown in FIGS. 20(a) and 20(b), a light source 22 is placed on the side opposite to the observer 21, and when the hologram laminate 10 is irradiated with light from the light source 22, the light semi-transmissive portion 6c of the metal layer 6 is illuminated. A predetermined pattern Id formed by the patterned light transmissive portion 6b can be observed by the light transmitted through the . Specifically, when light is irradiated from the side opposite to the observer 21, the pattern Id of the number "1" formed by the patterned light transmissive portions 6c of the metal layer 6 can be observed.

As described above, in this embodiment, since the metal layer having the patterned light semi-transmissive portion and the light reflective portion is arranged, the patterned light semi-transmissive portion of the metal layer can be seen through the hologram laminate. Partial patterns can be observed. Therefore, when light is irradiated from the observer's side, the reproduced image of the relief hologram layer can be observed. Partial patterns can be observed. Therefore, the relief hologram layer can obscure the existence of the patterned light semi-transmissive portion of the metal layer, thereby improving the anti-counterfeiting effect. In addition, designability can be improved. Furthermore, for example, when a light semi-transmissive portion is formed in a metal layer by laser irradiation, variable information such as name, ID, serial number, bar code, two-dimensional code, etc. can be transmitted to the hologram laminate by the patterned light-transmissive portion. The hologram laminate can be used as a variable information recording medium.

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 includes a volume hologram layer 3 and a metal layer 6 disposed on one side of the volume hologram layer 3 and having patterned light semitransmissive portions 6c and light reflecting portions 6b. and have Moreover, the hologram laminate 10 may further have optional layers as necessary. In FIG. A layer 4, a second adhesive layer 5, a metal layer 6, a relief hologram layer 8 and a second substrate 7 are arranged in order. Moreover, 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.

22(a) and (b) are views when the hologram laminate shown in FIG. 21 is observed, and FIG. 1 is a plan view when observed from the side of . As shown in FIGS. 22(a) and 22(b), when the light source 22 is placed on the side of the observer 21 and the hologram laminate 10 is irradiated with the reconstruction illumination light from the light source 22, interference recorded in the relief hologram layer 8 is detected. The image Ic is reproduced by diffraction of light by the fringes. Specifically, when the observer 21 irradiates the reproduction illumination light, the image Ic of the letter “A” reproduced on the relief hologram layer 8 can be observed. At this time, the metal layer 6 has patterned light semi-transmitting portions 6c and light reflecting portions 6b. Even if light is irradiated, the pattern formed by the patterned light semitransmissive portions 6c cannot be visually observed.

FIGS. 23A and 23B are diagrams when the hologram laminate shown in FIG. 21 is observed, and FIG. 1 is a plan view when observed from the side of . As shown in FIGS. 23A and 23B, when the light source 22 is placed on the side opposite to the observer 21 and the hologram laminate 10 is irradiated with light from the light source 22, the light semi-transmissive portion 6c of the metal layer 6 is illuminated. A predetermined pattern Id formed by the patterned light transmissive portion 6c can be observed by the light transmitted through the . Specifically, when light is irradiated from the side opposite to the observer 21, the pattern Id of the number "1" formed by the patterned light transmissive portions 6c of the metal layer 6 can be observed.

24(a) and (b) are views when the hologram laminate shown in FIG. 21 is observed, and FIG. 24(b) shows the surface of the hologram laminate 10 on the support 1 side in FIG. 1 is a plan view when observed from . As shown in FIGS. 24(a) and 24(b), the light source 22 is arranged on the side of the observer 21, and when the hologram laminate 10 is irradiated with the reconstruction illumination light from the light source 22 at a predetermined angle, the volume hologram layer 3 is recorded. The image Ia is reproduced by the diffraction of light by the interference fringes that are formed.
Specifically, when the observer 21 irradiates the reproduction illumination light, the star image Ia reproduced on the volume hologram layer 3 can be observed. At this time, the metal layer 6 has patterned light semi-transmitting portions 6c and light reflecting portions 6b. Even if light is irradiated, the pattern formed by the patterned light semitransmissive portions 6c cannot be visually observed.

In this embodiment, when the volume hologram layer is arranged on the surface of the metal layer opposite to the relief hologram layer, the reproduced image of the relief hologram layer is observed when irradiated with light from the relief hologram layer side. On the other hand, when observed by irradiating light from the volume hologram layer side, a reproduced image of the volume hologram layer can be observed, and when observed through the hologram laminate, the metal layer can be observed. Therefore, the anti-counterfeiting effect can be improved. Furthermore, designability can also be improved.

1. Metal Layer The metal layer in this embodiment is arranged on one surface of the volume hologram layer and has patterned light semi-transmissive portions and light reflecting portions.

The light translucent part of the metal layer transmits light. In the light semitransmissive portion of the metal layer, the spectral transmittance of the specific wavelength is, for example, preferably 10% or more and 75% or less, more preferably 20% or more and 60% or less, and 30% or more and 50% or less. is more preferable. Since the spectral transmittance of the specific wavelength in the light semi-transmissive portion is within the above range, it is possible to make it difficult to observe the pattern due to the light semi-transmissive portion when light is irradiated from the observer side. When the light is irradiated from the opposite side, the pattern of the light semi-transmissive portion can be easily observed.

The spectral transmittance of the specific wavelength in the light semi-transmissive portion of the metal layer is the spectral transmittance of the specific wavelength in the region in which the light semi-transmissive portion of the metal layer is arranged in the configuration in which the volume hologram layer is removed from the hologram laminate. Transmittance. 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 light semi-transmissive portion of the metal layer is arranged.

In the metal layer, the arrangement of the light semi-transmissive portions, the area ratio of the light semi-transmissive portions, the pattern shape of the light semi-transmissive portions in plan view, etc. are the same as those of the light transmissive portions of the metal layer in the first embodiment. can be done.

In addition, the line width of the light semi-transmissive portion makes it difficult to observe the pattern due to the light semi-transmissive portion when the light is irradiated from the observer side, while the light semi-transmissive portion is difficult to observe when the light is irradiated from the side opposite to the observer. It is not particularly limited as long as the pattern can be observed, and is appropriately selected according to the pattern shape of the light semi-transmissive portion.

For example, when the light semi-transmissive part has a stripe shape or a lattice shape, the line width of the light semi-transmissive part 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-transmissive portion is too small, it may become difficult to observe the pattern of the light semi-transmissive portion when the light is irradiated from the side opposite to the observer. In addition, if the line width of the light semi-transmissive portion is too large, the presence of the light-transmissive portion may become easily recognizable when light is irradiated from the observer's side.

The dimensions of the light semitransmissive portion can be measured by observing the surface of the hologram laminate with an optical microscope, laser microscope, or the like.

The material, thickness, arrangement, etc. of the metal layer can be the same as in the first embodiment.

In addition, when the light semi-transmissive portion is formed in the metal layer by altering the metal layer surface such as by oxidation, the light semi-transmitting portion is a portion where the metal layer surface is altered such as by oxidation. In this case, the light semi-transmissive portion can have reflectivity as well as the light reflecting portion.

As a method of forming the metal layer, for example, there is a method of forming a metal layer on one surface of the second base material and then forming a light semi-transmissive portion on the metal layer by laser irradiation. The method of forming the metal layer on one surface of the second base material can be the same as in the first embodiment. Moreover, as a method for forming a light semi-transmissive portion in a metal layer by laser irradiation, a general laser marking method for a metal layer can be applied. At this time, the optical characteristics of the light semi-transmissive portion can be controlled by adjusting the output of the laser. Specifically, when the laser output is low, the spectral transmittance of a specific wavelength in the light semi-transmissive portion tends to be low.

2. Support In this embodiment, the support is transparent because the pattern of the patterned light transmissive portions of the metal layer can be observed by looking through the hologram laminate.

Other points of the support can be the same as in the first embodiment.

B. Card The card in the present disclosure has the hologram laminate described above.

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

When the hologram laminate is used as a card, for example, it can be configured as shown in FIGS. 7(a) to (c) and FIGS. 8(a) to (c). 7(a), (b) and FIGS. 8(a), (b), the support 1 can be a core sheet, and although not shown, the metal layer 6, the relief hologram layer 8 and the like are covered. A transparent sheet (oversheet) may be arranged on one side of the support. 7(c) and 8(c), the support 1 can be a core sheet and the transparent sheet 14 can be an oversheet.

Also, when the hologram laminate is a hologram transfer foil, a hologram label, or an embedding hologram sheet, for example, it can be configured as shown in FIGS. 9(a) and 9(b). In the card, the hologram laminate can be placed on one side of the core sheet.

The transparent sheet is a member that protects the volume hologram layer, metal layer, and relief hologram layer. Moreover, when the transparent sheet is arranged on the outermost surface of the information recording medium, it can function as an oversheet that protects the surface of the information recording medium.

The transparent sheet may be any transparent sheet, and examples thereof include resin sheets of polyethylene terephthalate (PET), amorphous polyethylene terephthalate (PET-G), polyvinyl chloride (PVC), polycarbonate (PC), and the like. mentioned. The surface of the transparent sheet may be, for example, mirror-like or matte-like. The outline of the transparent sheet is the same as the outline of the card.

When using the hologram laminate as a card, the hologram laminate may have any configuration as necessary. As an arbitrary configuration, a configuration having a desired function can be appropriately selected and used according to the use of the card. Optional structures include, for example, a third adhesive layer, a printed layer, an intermediate sheet, an oversheet, an interlayer adhesive layer, an IC module containing an IC chip, an inlet containing an IC chip and an antenna, a magnetic stripe, and the like.

For example, in FIGS. 7(a) to (b) and FIGS. 8(a) to (b), although not shown, a transparent film is formed on one surface of the support 1 so as to cover the second protective layer 9 or the second substrate 7. When a sheet is arranged, a third adhesive layer may be arranged between the transparent sheet and the second protective layer 9 or the second substrate 7 . An example of the adhesive constituting the third adhesive layer is a heat sealing agent. The heat sealing agent is as described above.

Examples of cards include various IC cards, driver's licenses, insurance cards, employee ID cards, membership cards, ID cards such as student ID cards, credit cards, debit cards, cash cards, card keys, point cards, prepaid cards, and the like. can be mentioned.

C. Hologram Transfer Foil The hologram transfer foil in the present disclosure has the hologram laminate described above. In the present disclosure, the hologram laminate can be used as a hologram transfer foil.

When the hologram laminate is used as a hologram transfer foil, for example, it can be configured as shown in FIGS. 9(a) and 9(b). In this case, although not shown, a separator may be arranged on the surface of the first adhesive layer opposite to the volume hologram layer.

D. Hologram Label The hologram label in the present disclosure has the hologram laminate described above. In the present disclosure, the hologram laminate can be used as a hologram label.

When the hologram laminate is used as a hologram label, for example, it can be configured as shown in FIGS. 9(a) and 9(b). In this case, although not shown, a separator may be arranged on the surface of the first adhesive layer opposite to the volume hologram layer.

E. Data Page The data page in this disclosure has the hologram stack described above.

The hologram laminate constituting the data page can be, for example, the hologram laminate shown in FIGS. 9(a) and 9(b). 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 placed on one side of the core sheet. Also, an IC chip holding sheet containing an IC chip inside and a first transparent sheet are arranged in this order on the opposite side of the core sheet to the hologram laminate, and the support is arranged so as to cover the metal layer, the relief hologram layer, and the like. A second transparent sheet may be arranged on one side of the .

A core sheet is a member having a connecting portion for incorporating a data page into a booklet.
The data page can be attached to the cover and other pages of the booklet by stitching or the like through the connecting portion of the core sheet.

Examples of the core sheet include fiber sheets and sheets in which resin sheets are arranged on both sides of a fiber sheet.

Also, the core sheet may have an opening so as to overlap with the volume hologram layer or the relief hologram layer in plan view, for example. At the opening, the volume hologram layer and the relief hologram layer can be confirmed from one side or both sides of the data page.

The IC chip holding sheet is a member containing an IC chip inside. The IC chip holding sheet can contain an antenna and the like in addition to the IC chip inside. The IC chip holding sheet may also serve as the core sheet.

The IC chip holding sheet may have any structure as long as it can contain an IC chip, an antenna, etc., and can have a multilayer structure, for example. Resin sheets such as polyethylene terephthalate (PET), amorphous polyethylene terephthalate (PET-G), polyvinyl chloride (PVC), and polycarbonate (PC) can be used as the IC chip holding sheet.

Also, the IC chip holding sheet may have an opening so as to overlap the volume hologram layer or the relief hologram layer in a plan view, for example. At the opening, the volume hologram layer and the relief hologram layer can be confirmed from one side or both sides of the data page.

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 transparent sheets, and examples thereof include polyethylene terephthalate (PET), amorphous polyethylene terephthalate (PET-G), polyvinyl chloride (PVC), polycarbonate ( A resin sheet such as PC) can be used.

When using the hologram laminate as a data page, the hologram laminate may have any configuration as necessary. As an arbitrary configuration, a configuration having a desired function can be appropriately selected and used according to the use of the data page. Optional structures include, for example, a laser-printed layer, a white layer, a printed layer, an intermediate layer, and the like.

F. Brochures The brochures in this disclosure comprise the data pages described above. Examples of booklets include passports and the like.

It should be noted that the present disclosure is not limited to the above embodiments. The above embodiment is an example, and any device that has substantially the same configuration as the technical idea described in the claims of the present disclosure and achieves the same effect is the present invention. It is included in the technical scope of the disclosure.

The present disclosure will be specifically described below with reference to examples.

[Example 1]
(1) Production of Film A and Film B First, Film A and Film B were produced separately by independent processes.

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

(Preparation of film A)
A 50 μm thick polyethylene terephthalate (PET) film (Lumirror T60; manufactured by Toray Industries, Inc.) was used as the base material A. On the base material A, a volume hologram layer composition having the following composition was applied to a thickness of 30 m by gravure coating. /min and dried at 100°C to volatilize the solvent to form a volume hologram forming layer having a thickness of about 10 µm. Furthermore, a film A was obtained by laminating a polyethylene terephthalate (PET) film (SP-PET; manufactured by Mitsui Chemicals Tohcello, Inc.) having a thickness of 38 μm and having a release treatment on the surface on the volume hologram forming layer.

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

(2) Production 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 is peeled off from the film A, the exposed volume hologram forming layer is laminated on the hologram original plate, and a laser beam having a wavelength of 532 nm is used at an incident angle of 45° and an output angle of 0°. A Lippmann hologram was taken and recorded. Next, the film A is peeled off from the hologram original plate, and a polypropylene film (Alphan E-201F; manufactured by Oji F-Tex Co., Ltd.) is laminated on the exposed volume hologram layer surface, and the polypropylene film, the volume hologram layer, and the base material A are laminated. A laminate 1 having the following order was obtained.

Next, the polypropylene film was peeled off from the laminate 1, and the film B was laminated while being heated to 80°C to obtain a laminate 2 having the substrate B, the protective layer, the volume hologram layer, and the substrate A in this order. . After that, 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 ultraviolet rays of 2500 mJ/cm ² from a high-pressure mercury lamp for fixing.

Next, the substrate A was peeled off from the laminate 2, and a heat sealing agent composition in which an ethylene-vinyl acetate copolymer was dissolved in a solvent was applied to the exposed volume hologram layer using a bar coater to a thickness of 5 μm. A heat-sealing layer was formed by coating and drying. Thus, a volume hologram transfer foil was obtained.

(3) Production of Relief Hologram Label As the substrate C, a polyethylene terephthalate (PET) film (Lumirror T60; manufactured by Toray Industries, Inc.) having a thickness of 50 μm was used. An ultraviolet curable resin composition was applied to one side of the base material C, and cured by irradiating ultraviolet rays with a relief hologram duplicating mold pressed against it to form a hologram forming layer having fine irregularities of the hologram. A metal layer was formed by vapor-depositing aluminum to a thickness of 400 Å on the fine irregularities of the obtained hologram-forming layer. A pressure-sensitive adhesive composition in which an acrylic resin (PE-118; manufactured by Nissetsu Co., Ltd.) is dissolved in a solvent is applied to the exposed surface of the metal layer with a bar coater to a thickness of 20 μm, and dried. A pressure-sensitive adhesive layer was formed by allowing the A relief hologram label was thus obtained.

(4) Production of Hologram Laminate The volume hologram transfer foil was transferred to the support by applying pressure while heating to 120° C., and the substrate B was peeled off to expose the protective layer. Thereafter, a relief hologram label was laminated on the surface of the protective layer by laminating a pressure-sensitive adhesive layer. At this time, the volume hologram was laminated by rotating the incident direction of the reproduction light by 90° counterclockwise with respect to the relief hologram reproduction image.

(5) Laser drawing on the metal layer The above-mentioned hologram laminate is drawn in a grid pattern with a laser beam diameter of 40 μm and a scanning interval during drawing of 220 m. A pattern having a light-transmitting portion and a light-reflecting portion was formed.

[Evaluation 1]
First, the fabricated hologram laminate was irradiated with reconstruction illumination light at an incident angle of about 45°, and the hologram laminate was observed at an observation angle of about 0° from the same side as the reconstruction illumination light. At this time, as shown in FIG. 25A, only the reproduced image of the relief hologram (English alphabet letters, hemp pattern, and "GENUINE" micro-characters) could be confirmed. Next, the incident direction of the reconstruction illumination light was rotated counterclockwise by 90° and irradiated at an incident angle of about 45°, and the hologram laminate was observed at an observation angle of about 0° from the same side as the reconstruction illumination light. . As for the reproduced image at this time, as shown in FIG. 25(b), the reproduced image of the volume hologram (wavy line pattern, etc.) could be confirmed through the lattice-shaped light transmitting portion. In addition, in FIG. 25(b), the reproduced image of the volume hologram could also be visually observed in green. In addition, in the present disclosure, the color of the reproduced image of the volume hologram is not particularly limited.

[Example 2]
(1) Fabrication of Relief Hologram Film As the substrate D, a 16 μm-thick polyethylene terephthalate (PET) film (Lumirror; manufactured by Toray Industries, Inc.) was used. An ultraviolet curable resin composition was applied to one side of substrate D, and cured by irradiating ultraviolet rays while a relief hologram duplication mold was pressed to form a hologram forming layer having fine irregularities of the hologram. A metal layer was formed by vapor-depositing aluminum to a thickness of 400 Å on the fine irregularities of the obtained hologram-forming layer. A primer resin was applied to the exposed surface of the metal layer to form a primer layer.

(2) Production of Hologram Laminate Next, a hologram was recorded on the layer for forming a volume hologram, and a resin layer was laminated. Specifically, first, the release PET film was peeled off from the film A used in Example 1, the exposed volume hologram forming layer was laminated on the hologram original plate, and a laser beam with a wavelength of 532 nm was used, and the incident angle was 45°. , the Lippmann hologram was taken and recorded at an exit angle of 0°. At this time, the reproduced image of the volume hologram was oriented with the substrate A side as the front. Next, the film A is peeled off from the original hologram plate, and a polypropylene film (Alphan E-201F; manufactured by Oji F-Tex Co., Ltd.) is laminated on the exposed volume hologram layer surface to form the polypropylene film, the volume hologram layer, and the base material A. A laminate 1 having these order was obtained.

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 form the substrate D, the relief hologram layer, the metal layer, the primer layer, the volume hologram layer, and the substrate A. A laminate 2 having these order was obtained. After that, 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 ultraviolet rays of 2500 mJ/cm ² from a high-pressure mercury lamp for fixing.

(3) Laser drawing on the metal layer A laser beam diameter of 80 μm is used to draw on the above-mentioned hologram laminate, and an image of a human face having a dot-shaped light transmitting portion with a diameter of 80 μm and a light reflecting portion is obtained. formed.

[Evaluation 2]
First, the produced hologram laminate was irradiated with reconstruction illumination light from the substrate D side at about 45°, and the hologram laminate was observed at an observation angle of about 0° from the same side as the reconstruction illumination light. At this time, only the reproduced image of the relief hologram could be 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 at an observation angle of about 0° from the same side as the reconstruction illumination light. At this time, in addition to the reproduced image of the relief hologram, the reproduced image of the volume hologram could also be observed. In addition, the hologram laminate was observed by holding it up to indoor lighting. At this time, I was able to observe the face of the person drawn with the laser.

[Example 3]
The hologram laminate produced in Example 2 was drawn with a laser beam diameter of 80 μm to form an image of a human face having a light semitransmissive portion and a light reflecting portion.

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

That is, the present disclosure provides, for example, the following inventions.

[1]
a volume hologram layer;
a metal layer disposed on one surface of the volume hologram layer and having a patterned light transmitting portion and a light reflecting portion;
A hologram laminate.

[2]
The hologram laminate according to [1], which has a relief hologram layer on the surface of the metal layer opposite to the volume hologram layer.

[3]
The hologram laminate according to [2], wherein the metal layer is arranged on the uneven surface of the relief hologram layer.

[4]
From [1], the surface of the volume hologram layer opposite to the metal layer has, in order from the volume hologram layer side, an adhesive layer, a laser coloring layer having a patterned coloring portion, and a support. A hologram laminate according to any one of [3].

[5]
a relief hologram layer;
a metal layer disposed on one surface of the relief hologram layer and having dot-shaped light transmitting portions and light reflecting portions;
A hologram laminate.

[6]
a relief hologram layer;
a metal layer disposed on one surface of the relief hologram layer and having a patterned light semi-transmissive portion and light reflecting portion;
A hologram laminate.

[7]
The hologram laminate according to [5] or [6], which has a volume hologram layer on the surface of the metal layer opposite to the relief hologram layer.

[8]
A card having the hologram laminate according to any one of [1] to [7].

[9]
A hologram transfer foil, comprising the hologram laminate according to any one of [1] to [7].

[10]
A hologram label comprising the hologram laminate according to any one of [1] to [7].

[11]
A data page having the hologram laminate according to any one of [1] to [7].

[12]
Brochures comprising the data pages of [11].

REFERENCE SIGNS LIST 1 support 2 first adhesive layer 3 volume hologram layer 4 first protective layer 5 second adhesive layer 6 metal layer 6a light transmitting portion 6b light reflecting portion 6c light semi-transmitting portion 7 second 2 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

a volume hologram layer;
a metal layer disposed on one surface of the volume hologram layer and having a patterned light transmitting portion and a light reflecting portion;
A hologram laminate.
The hologram laminate according to claim 1, having a relief hologram layer on the surface of the metal layer opposite to the volume hologram layer.
The hologram laminate according to claim 2, wherein the metal layer is arranged on the uneven surface of the relief hologram layer.
2. The method according to claim 1, wherein an adhesive layer, a laser coloring layer having a patterned coloring portion, and a support are provided in this order from the volume hologram layer on the surface of the volume hologram layer opposite to the metal layer. A hologram laminate as described.
a relief hologram layer;
a metal layer disposed on one surface of the relief hologram layer and having dot-shaped light transmitting portions and light reflecting portions;
A hologram laminate.
a relief hologram layer;
a metal layer disposed on one surface of the relief hologram layer and having a patterned light semi-transmissive portion and light reflecting portion;
A hologram laminate.
The hologram laminate according to claim 5, having a volume hologram layer on the surface of the metal layer opposite to the relief hologram layer.
The hologram laminate according to claim 6, having a volume hologram layer on the surface of the metal layer opposite to the relief hologram layer.
A card having the hologram laminate according to any one of claims 1 to 7.
A hologram transfer foil having the hologram laminate according to any one of claims 1 to 7.
A hologram label having the hologram laminate according to any one of claims 1 to 7.
A data page having the hologram laminate according to any one of claims 1 to 7.
A booklet or the like comprising the data page according to claim 11.