JP2797944B2 - Transparent hologram seal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal having a transparent hologram, and more particularly to a transparent hologram seal which prevents reuse and makes it difficult to forge or tamper with the seal.

[0002]

2. Description of the Related Art Conventionally, countermeasures against forgery are made by making it difficult to imitate the article itself, or by attaching an object that is difficult to imitate to the article as proof of authenticity. Some things make it possible to distinguish between genuine and fake. For example, in the former case, fine processing is applied to itself, such as securities such as banknotes, or coloring of a color that is difficult to imitate, or the material is special, improper use of imitation or printing technology, or copying machine This makes it difficult to prevent forgery caused by illegal copying by the company. Furthermore, advances in print duplication technology and digital technologies such as copiers have made it possible to easily reproduce even the fine processing described above, even if it is difficult to imitate colors. Correspondingly, there is a trend to make the processing technology higher and finer and to make duplication and forgery more difficult.

[0003] The latter is easy to handle because it is merely attached to an article, and thus has become widely used. For example, there is a seal on which an image formed of a relief hologram is formed. This has the effect that a hologram image is formed in an uneven shape and mass production is possible by embossing. In particular, considering the layer configuration, it is configured to make the seal difficult to peel or difficult to regenerate after peeling, and once it is attached to cards, bills, certificates, etc. as an object to be used, The fact that a part or the whole of the hologram is destroyed makes it possible to determine at a glance that not only counterfeiting but also tampering with the object has been done.

As such prior art, Japanese Utility Model Publication No.
As described in Japanese Patent No. 4432, there is a method in which a release layer is partially provided on the back side of a transparent plastic substrate, which is formed in a pattern, and an adhesive layer is provided thereon.
Further, as described in Japanese Utility Model Publication No. 3-7372, a transparent release layer is partially formed on the back side of a transparent film substrate, and a print display section layer is provided on the transparent release layer. As described in Japanese Utility Model Publication No. 4-17554, a re-adhesion preventing pressure-sensitive adhesive sheet is disclosed.

[0005] Further, in the case of a seal provided with a forgery prevention function, there are demands for easily determining whether the seal is genuine or fake, making it difficult to determine the configuration of the seal itself, and preventing the forgery prevention function from being changed by the surrounding environment. is there.

[0006]

However, the true / false discrimination by advanced miniaturization is overlooked if the microscopic part is enlarged or compared with the genuine one unless it is carefully observed. In addition, it is becoming difficult to meet the actual transaction conditions, such as the need to take sufficient time for the location and confirmation of the location. Further, even if the material is special, it cannot be made a completely unique material, and the cost is high, which is not realistic. Further, the hologram as described above has a simple structure such as a hologram principle and a layer, and is likely to be forged, so that the effect of preventing forgery is weakened. Furthermore, the sheet or the re-adhesion-preventive pressure-sensitive adhesive sheet patterned with the above-mentioned release layer exhibits its function by being peeled off. Are difficult to determine.

Accordingly, the present invention provides a forgery / tamper-prevention seal having a unique color tone which makes it difficult to determine the layer structure and constituent materials of the seal itself. It is an object of the present invention to provide a laminated hologram seal for preventing optical forgery and tampering formed by laminating.

[0008]

According to a first aspect of the present invention, there is provided a transparent hologram seal in which a hologram forming layer, a transparent vapor-deposited layer, and an adhesive layer are sequentially provided on a substrate, wherein the transparent vapor-deposited layer is refracted. A transparent hologram seal characterized by laminating a plurality of ceramic materials having different rates.

According to a second aspect of the present invention, in a transparent hologram seal in which a hologram forming layer, a transparent vapor-deposited layer, a release layer, and an adhesive layer are sequentially provided on a base material, the transparent vapor-deposited layers have different refractive indices. A transparent hologram seal, which is formed by laminating a plurality of ceramic materials.

According to a third aspect of the present invention, there is provided a transparent hologram seal having a hologram-forming layer, a transparent vapor-deposited layer, a release layer, and an adhesive layer provided on a substrate, wherein the transparent vapor-deposited layer has a plurality of different refractive indexes. A transparent hologram seal characterized by laminating the above ceramic materials.

The invention described in claim 4 is based on claim 1,
A transparent hologram seal characterized in that the transparent vapor-deposited layer is composed of a combination of a high-refractive-index layer and a low-refractive-index layer, based on the premise of the inventions described in 2 and 3.

According to a fifth aspect of the present invention, based on the premise of the fourth aspect, the transparent vapor-deposited layer is made of a ceramic material having a different refractive index, and is formed of a high refractive index layer and a low refractive index layer. This is a transparent hologram seal characterized by being arranged alternately.

According to a sixth aspect of the present invention, based on the fourth aspect, the transparent vapor-deposited layer is made of a combination of magnesium fluoride, silicon dioxide, or magnesium oxide and zinc sulfide. A transparent hologram seal characterized in that:

According to a seventh aspect of the present invention, based on the fourth aspect, the transparent vapor-deposited layer is made of a combination of any one of magnesium fluoride, silicon dioxide, or magnesium oxide and zirconium dioxide. A transparent hologram seal characterized in that:

According to an eighth aspect of the present invention, based on the premise of the fourth aspect, the transparent vapor-deposited layer is made of magnesium fluoride, silicon dioxide, or a combination of magnesium oxide and titanium dioxide. A transparent hologram seal characterized in that:

According to a ninth aspect of the present invention, based on the premise of the fourth aspect, the transparent vapor-deposited layer is made of magnesium fluoride, silicon dioxide, calcium fluoride, cerium fluoride, aluminum fluoride, aluminum oxide or aluminum oxide. A transparent hologram seal comprising a combination of any one of magnesium oxide and cerium dioxide.

The invention described in claim 10 is the fourth invention.
On the premise of the described invention, the transparent vapor-deposited layer is made of a combination of any one of magnesium fluoride, silicon dioxide, calcium fluoride, cerium fluoride, aluminum fluoride, aluminum oxide or magnesium oxide and tantalum oxide. The feature is a transparent hologram seal.

The invention described in claim 11 is the fourth invention.
On the premise of the described invention, the transparent vapor-deposited layer is made of a combination of any one of magnesium fluoride, silicon dioxide, calcium fluoride, cerium fluoride, aluminum fluoride, aluminum oxide or magnesium oxide and zinc oxide. The feature is a transparent hologram seal.

The invention described in claim 12 is the fourth invention.
On the premise of the described invention, the transparent vapor-deposited layer is made of a combination of any one of magnesium fluoride, silicon dioxide, calcium fluoride, cerium fluoride, aluminum fluoride, aluminum oxide or magnesium oxide and indium oxide. The feature is a transparent hologram seal.

According to a thirteenth aspect of the present invention, based on the first, second and third aspects, an adhesive anchor layer is laminated between a transparent vapor deposition layer and the adhesive layer. Transparent hologram seal.

According to the fourteenth aspect of the present invention,
On the premise of the invention described in 3, the transparent hologram seal is characterized in that a colored layer is provided on the surface of the transparent vapor-deposited layer on the side of the adhesive layer.

The invention according to claim 15 is the invention according to claims 1, 2,
The transparent hologram seal according to claim 1, wherein the release layer is formed partially or in a pattern on the premise of the invention described in (3).

[0023]

According to the transparent hologram seal of the present invention, it has a property of reflecting or transmitting a light beam in a specific wavelength region by alternately combining a low-refractive index and a high-refractive index ceramic in a transparent vapor-deposited layer, and By changing the viewing angle, the thickness of the transparent vapor-deposited layer changes, so that the wavelength region shifts and the color looks different, which makes it easier to determine.

When the seal is peeled off by the peeling layer,
The other layer is peeled off from the peeling layer, and a part of the other layer that is not in contact with the peeling layer is broken, a part of which remains on the adherend, and the other adheres to the peeled seal. Further, by forming a colored layer in the lower layer, the transfer foil can be colored without affecting the color change of the transmitted light or the reflected light and the transfer of the transparent vapor-deposited layer to the substrate to be transferred, so that it is easier to see. And the type of color can be selected. Further, by forming the peeling layer into a pattern, the portion broken at the time of peeling appears as a specific pattern, mark, character, or the like having the above optical characteristics.

[0025]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

FIGS. 1A and 1B are cross-sectional views showing the structure of a transparent hologram seal of the present invention, and FIGS. 2A and 2B are diagrams of a transparent hologram seal of another embodiment of the present invention. FIGS. 3A and 3B are cross-sectional views illustrating a configuration of a transparent hologram seal according to another embodiment of the present invention, and FIGS. 4A and 4B are FIGS. FIG. 5 is a cross-sectional view showing another configuration of the transparent hologram seal in FIG. 5, FIG. 5 is a cross-sectional view showing a state before and after peeling of the transparent hologram seal of the present invention shown in FIG. 2, and FIGS. FIG. 8 is a graph showing a visible spectrum of a transparent vapor-deposited layer by a seal, and FIG. 8 is a graph showing a visible spectrum of a transparent hologram seal as a comparative example with respect to the transparent hologram seal of the present invention.

FIG. 1A shows a transparent hologram seal 1 of the present invention, in which a hologram forming layer 3, a transparent vapor deposition layer 4, and an adhesive layer 5 are sequentially laminated on a base material 2. Transparent deposited layer 4
Is a ceramic layer composed of a high refractive index layer 6 and a low refractive index layer 7. Further, as shown in FIG. 1B, an adhesive anchor layer 10 can be provided between the transparent vapor deposition layer 4 and the adhesive layer 5. It is provided in consideration of the adhesiveness between the adhesive layer 5 and the transparent evaporation layer 4. On the other surface of the base material 2, a print layer such as a pattern or a character may be provided as long as it does not cause an obstacle, and a protective layer (not shown) for protecting the surface.
Can be provided as needed.

FIG. 2A is a sectional view showing the structure of a transparent hologram seal 11 according to another embodiment of the present invention. And an adhesive layer 5 are sequentially laminated. The transparent vapor deposition layer 4 is a ceramic layer composed of a high refractive index layer 6 and a low refractive index layer 7. In addition, a printed layer such as a pattern or a character may be provided on the other surface of the base material 2 as long as it does not cause an obstacle, and a protective layer may be provided as necessary to protect the printed layer. Similarly, an adhesive anchor layer 10 can be provided between the transparent vapor-deposited layer 4 and the adhesive layer 5 as shown in FIG. It is provided in consideration of the adhesiveness between the adhesive layer 5 and the transparent evaporation layer 4.

FIG. 3A is a sectional view showing the structure of a transparent hologram seal 21 according to another embodiment of the present invention.
A hologram forming layer 3, a transparent vapor deposition layer 4, a release layer 8, and an adhesive layer 5 are sequentially laminated on a substrate 2. The transparent vapor deposition layer 4 is a ceramic layer composed of a high refractive index layer 6 and a low refractive index layer 7. In addition, a printed layer such as a pattern or a character may be provided on the other surface of the base material 2 as long as it does not cause an obstacle, and a protective layer may be provided as necessary to protect the printed layer. Similarly, an adhesive anchor layer 10 can be provided between the transparent vapor-deposited layer 4 and the adhesive layer 5 as shown in FIG. It is provided in consideration of the adhesiveness between the adhesive layer 5 and the transparent evaporation layer 4.

The base material 2 needs to have sufficient transparency so that the lower layer can be seen through the base material 2. It is sufficient that the base material 2 has a certain degree of rigidity and surface smoothness, and is not particularly limited. For example, a polymer film such as a polyester film and a polyolefin film can be used. It is also possible to color with a colorant within a range that has no effect.

The hologram forming layer 3 is made of a thermoplastic resin such as a polycarbonate resin, a polystyrene resin, and a polyvinyl chloride resin, an unsaturated polyester resin, a melamine resin,
Thermosetting resins such as epoxy resin, urethane (meth) acrylate, polyester (meth) acrylate, epoxy (meth) acrylate, polyol (meth) acrylate, melamine (meth) acrylate, and triazine (meth) acrylate, or a mixture thereof, Is a thermoformable substance having a radically polymerizable unsaturated group, and any material may be used as long as it has a stability capable of forming a hologram image.
Note that the hologram image is not particularly limited, but there is, for example, a relief hologram that expresses an image with minute unevenness. Further, the base material 2 and the hologram forming layer 3 can be combined into a single layer, which may be possible depending on the selection of the material.

The transparent vapor deposition layer 4 provided on the hologram image forming surface of the hologram forming layer 3 is formed by alternately laminating a plurality of ceramics having different refractive indices with a specific film thickness. Magnesium oxide (refractive index n = 1.6), silicon dioxide (n = 1.5), magnesium fluoride (n = 1.4), calcium fluoride (n = 1.
3-1.4), cerium fluoride (n = 1.6), aluminum fluoride (n = 1.3), aluminum oxide (n =
1.6) and titanium dioxide (n = 2.4) and zirconium dioxide (n = 2.
0), zinc sulfide (n = 2.3), zinc oxide (n = 2.
1) A composite layer in which one of indium oxide (n = 2.0), cerium dioxide (n = 2.3), and tantalum oxide (n = 2.1) is laminated with a predetermined thickness. . The transparent vapor-deposited layer 4 may be provided with a plurality of layers composed of the above combinations. In this embodiment, materials other than those listed above can be used as long as they satisfy the lamination conditions of the constituent layers.

The light path length in the thin film is changed by reflecting or transmitting a light beam in a predetermined wavelength range on the transparent vapor-deposited layer 4 and by changing the viewing angle, so that the color of the transmitted light or the reflected light is changed. is there. Thereby, anti-counterfeiting properties are exhibited.

Since the hologram-forming layer 3 of the transparent hologram seal of the present invention is an organic polymer and has a low refractive index, it is desirable that the next layer in contact with the hologram-forming layer 3 has a high refractive index. Generally, spectral characteristics change according to the number of layers. In the transparent hologram seal 1 of this embodiment, the number of layers including the hologram forming layer 3 is an even number, but the transparent vapor deposition layer 4 is an odd number. Further, as shown in FIGS.
It is also possible to provide a colored layer 9 of ceramic or colored transparent ink under the transparent vapor-deposited layer 4 of the transparent hologram seal (not shown, but the same applies to FIGS. 2 and 3).
Thereby, the color change becomes diversified and easy to see, so that the forgery prevention effect is improved.

As long as the thickness of the transparent evaporation layer 4 can be controlled, any film formation method can be used. Above all, a dry method is excellent for forming a thin film, and a physical vapor deposition method such as an ordinary vacuum vapor deposition method, a sputtering method, or a chemical vapor deposition method such as a CVD method can be used for this purpose.

The total thickness of the transparent vapor deposited layer 4 is desirably 1 μm or less. If the thickness exceeds 1 μm, the flexibility becomes poor and cracks may occur in the transparent vapor-deposited layer 4.

The release layer 8 must be smaller than the adhesive strength of the adhesive layer 5 to an object to be bonded, for example, paper, plastic, or the like, and satisfies this requirement and is stable against subsequent processing. Any object may be used. It may be an organic material or an inorganic material. For example, there are thermoplastic acrylic resin, chlorinated rubber resin, vinyl chloride-vinyl acetate copolymer resin, cellulose resin, chlorinated polypropylene, or those obtained by adding oil silicone, fatty acid amide, and zinc stearate thereto. Therefore, the peeled portion (the portion remaining on the adherend) only needs to have higher adhesiveness of the adhesive layer than the adhesiveness of the peeling layer, and the remaining portion of the substrate has good adhesion of the transparent vapor-deposited layer to the substrate. Must. Any pattern can be used as long as it can be visually identified.Specific patterns, marks, characters, and the like can be used, and they can be formed by conventionally known printing means such as gravure printing, coating means. , Can be arbitrarily selected according to the application.

The adhesive layer 5 has an adhesive property larger than that of the release layer 8 and alters the quality of the transparent vapor-deposited layer 4 in contact therewith.
Unless it does not hinder, the adhesive usually used can be used. Examples include, but are not limited to, vinyl chloride-vinyl acetate copolymers, acrylic adhesives, polyester polyamides, and the like.

The adhesive anchor layer 10 is for improving the adhesive effect. When the adhesive anchor layer 10 is provided on the adhesive layer 5, the adhesive anchor layer 10 has the above-mentioned effect and must not alter or affect the transparent vapor-deposited layer 4. Various materials can be used, for example, epoxy resin and the like.

FIG. 5 is a cross-sectional view showing the transparent hologram seal 11 of the present invention before and after peeling, shown in FIG. 2, showing a substrate 2, a hologram forming layer 3, a transparent vapor deposition layer 4, and a peeling layer formed in a pattern. 8, an adhesive anchor layer 10 and an adhesive layer 5 are sequentially laminated. By forming the release layer 3 in a pattern, the bonding surface of the transparent hologram seal 11 and the bonding surface of the adherend 13 are bonded as shown in FIG.
As shown in FIG. 5B, when the transparent hologram seal 11 is peeled from the adherend 13, a part of the transparent hologram seal 11 on which the release layer 8 is formed remains on the surface of the adherend 13 and is transparent. The hologram seal 11 has a release layer 8
The broken portion of the transparent vapor deposition layer 4 remains in the pattern shown in FIG.
From these, a forgery prevention pattern 12 appears. This is the same for the transparent hologram seals shown in FIGS.

Although not shown, the transparent hologram seal 21 of the present invention shown in FIG. 3 is peeled off between the base material 2 and the hologram forming layer 3, so that the surface of the object to be adhered has the hologram forming layer 3 and subsequent portions. Layer remains and separates from the substrate 2. When the release layer 8 is formed in a pattern, a part of the transparent hologram seal on which the release layer 8 is formed remains on the surface of the adherend 13 as described above, and the release layer 8 is formed on the transparent hologram seal. The broken portion of the transparent vapor deposition layer 4 remains in a pattern. From these, a forgery prevention pattern appears.

Although not shown in the drawing, the transparent hologram seal of the present invention can be used with the transparent hologram seal 1 of FIG. When the transparent hologram seal is separated from the adherend 13, at least a part of the transparent hologram seal, for example, the transparent vapor deposition layer 4 remains on the surface of the adherend 13, and Since a broken portion of the transparent vapor deposition layer 4 occurs, it is possible to easily determine the state after the peeling.

Next, the present invention will be described in detail with reference to examples.

The visible spectrum of the prepared transparent hologram seal of the present invention and the transparent hologram seal prepared for comparison with the transparent hologram seal of the present invention were measured with an off-visible / visible spectrophotometer. FIG.
A transparent hologram seal having a release layer on which a pattern was formed as shown in (1) was prepared, and was actually adhered to an object to be bonded, and the release state was evaluated.

Example 1 A 12 μm-thick polyester film was used for the base material 2, magnesium fluoride was used for the low-refractive-index layer 7, and zinc sulfide was used for the high-refractive-index layer 6 for the transparent vapor-deposited layer 4. The number of layers was five. The total film thickness was 1 μm. After forming the hologram forming layer 3 and the transparent vapor deposition layer 4 on the base material 2 respectively, the adhesive anchor layer 10,
An adhesive layer 5 was provided to provide a seal.

Table 1 shows the structure of the transparent hologram seal of this embodiment, the state of the layers, and the evaluation results. FIG. 6 shows the visible spectrum of this seal. The center wavelength of visible light absorption perpendicular to the film was 550 nm, and when visible light was incident from an angle of 45 degrees, the center wavelength was shifted to a lower wavelength side to cause a color change.

<Example 2> A polyester film having a thickness of 12 μm was used for the base material 2, silicon dioxide was used for the low refractive index layer 7, and titanium dioxide was used for the high refractive index layer 6 for the transparent evaporation layer 4. The number of layers was five. Total film thickness is 1
μm. After forming the hologram-forming layer 3 and the transparent vapor-deposited layer 4 on the base material 2 respectively, an adhesive anchor layer 10 and an adhesive layer 5 were provided to form a seal. Table 1 shows the configuration of the transparent hologram of this example, the state of the layers, and the evaluation results. The center wavelength of visible light absorption perpendicular to the film is 550 nm,
When visible light was incident from an angle of 45 degrees, the center wavelength shifted to a lower wavelength side, causing a color change.

Example 3 A 12 μm-thick polyester film was used for the base material 2, silicon dioxide was used for the low-refractive-index layer 7, and zirconium dioxide was used for the high-refractive-index layer 6. The number of layers was five. The total film thickness was 1 μm. After forming the hologram forming layer 3 and the transparent vapor deposition layer 4 on the base material 2 respectively, the adhesive anchor layer 1 is formed.
0, an adhesive layer 5 was provided to form a seal. Table 1 shows the configuration of the transparent hologram seal of this example, the state of the layers, and the evaluation results. The center wavelength of visible light absorption perpendicular to the film is 55
The center wavelength was shifted to a lower wavelength side when visible light was incident from an angle of 45 degrees, causing a color change.

Example 4 A 12 μm-thick polyester film was used for the base material 2, magnesium fluoride was used for the low-refractive-index layer 7, and zinc sulfide was used for the high-refractive-index layer 6 for the transparent vapor-deposited layer 4. The number of layers was five. The total film thickness was 1 μm. FIG. 7 shows the visible spectrum of this seal. After forming the hologram-forming layer 3 and the transparent vapor-deposited layer 4 on the base material 2 respectively, an adhesive anchor layer 10 and an adhesive layer 5 were provided to form a seal. Table 1 shows the configuration of the transparent hologram seal of this example, the state of the layers, and the evaluation results. The central wavelength of visible light absorption perpendicular to the film was 550 nm. When visible light was incident from an angle of 45 degrees, the center wavelength shifted to a lower wavelength side, causing a color change. The adhesion of the transparent evaporation layer 4 to the substrate 2 was good.

Example 5 A 12 μm-thick polyester film was used for the base material 2, a thermoplastic acrylic resin containing oil silicone was used for the release layer 8, and the release layer 3 was formed into a pattern by gravure printing. Formed. Magnesium fluoride was used for the low-refractive-index layer 7 and zinc sulfide was used for the high-refractive-index layer 6 for the transparent vapor-deposited layer 4, and the number of layers was five. The total film thickness was 1 μm. After forming a hologram forming layer 3, a transparent vapor-deposited layer 4, and a release layer 8 on the substrate 2, respectively, an adhesive anchor layer 10 and an adhesive layer 5 were provided to form a seal. Table 1 shows the configuration of the transparent hologram seal of this example, the state of the layers, and the evaluation results. The central wavelength of visible light absorption perpendicular to the film was 550 nm. When visible light was incident from a 45 degree angle, the center wavelength shifted to the lower wavelength side, causing a color change. This transparent hologram seal had a sufficient function as a brittle seal.

Example 6 A 12 μm-thick polyester film was used for the substrate 2, a thermoplastic acrylic resin containing oil silicone was used for the release layer 8, and the release layer 3 was patterned by gravure printing. Formed. Magnesium fluoride was used for the low-refractive-index layer 7 and zinc sulfide was used for the high-refractive-index layer 6 for the transparent vapor-deposited layer 4, and the number of layers was five. The total film thickness was 1 μm. After forming a release layer 8, a hologram forming layer 3, and a transparent vapor deposition layer 4 on the substrate 2, respectively, an adhesive anchor layer 10 and an adhesive layer 5 were provided to form a seal. Table 1 shows the configuration of the transparent hologram seal of this example, the state of the layers, and the evaluation results. The central wavelength of visible light absorption perpendicular to the film was 550 nm. When visible light was incident from an angle of 45 degrees, the center wavelength shifted to a lower wavelength side, causing a color change. This seal had a sufficient function as a brittle seal.

[0052]

[Table 1]

<Comparative Example 1> A polyester film having a thickness of 12 μm was used as a base material, magnesium fluoride was used as a low-refractive-index layer, zinc sulfide was used as a high-refractive-index layer, and a transparent evaporation layer was used. The number was three layers. Total film thickness is 1 μm
It was as follows. After forming a hologram-forming layer and a transparent vapor-deposited layer on a base material, an adhesive anchor layer and an adhesive layer were provided to form a seal.

Table 2 shows the structure, the state of the layers, and the evaluation results of the transparent hologram seal of this comparative example. FIG. 8 shows the visible spectrum of the transfer foil. The central wavelength of visible light absorption perpendicular to the film was 550 nm. 45 visible light
The center wavelength shifted to the lower wavelength side when the light was incident from an angle of degrees, but the color change was not sharp.

<Comparative Example 2> A polyester film having a thickness of 12 μm was used as a base material, magnesium fluoride was used as a low refractive index layer and zinc sulfide was used as a high refractive index layer for a transparent vapor deposition layer. The number was seven layers. Total film thickness is 1 μm
And After forming a hologram-forming layer and a transparent vapor-deposited layer on a base material, an adhesive anchor layer and an adhesive layer were provided to form a seal. Table 2 shows the configuration of the brittle seal of this comparative example, the state of the layer, and the evaluation results. The central wavelength of visible light absorption perpendicular to the film was 550 nm. When visible light was incident from an angle of 45 degrees, the center wavelength shifted to a lower wavelength side, causing a color change. However, due to the large number of layers, the adhesion of the transparent vapor-deposited layer to the substrate was poor, and the transparent vapor-deposited layer was cracked by bending.

[0056]

[Table 2]

[0057]

According to the transparent hologram seal of the present invention, a hologram-forming layer, a transparent vapor-deposited layer, an adhesive layer, or an adhesive anchor layer as required, are provided on a substrate, and the transparent vapor-deposited layer is provided with a plurality of layers having different refractive indices. By laminating a ceramic material to a specific thickness, it shows the property of reflecting or transmitting light in a specific wavelength range, and depending on the viewing angle,
Since the thickness of the transparent vapor-deposited layer changes, the optical path length in the thin film changes, and the color of transmitted light or reflected light appears to change. As a result, the colors look different, so that it is easy to discriminate the colors and exhibit extremely high anti-counterfeiting properties.

Further, by providing a peeling layer between the transparent vapor-deposited layer and the adhesive layer, when the seal is peeled off, the other layer peels off from the peeling layer, and the part of the other layer not in contact with the peeling layer is broken. Then, a part thereof remains on the adherend, and the other adheres to the peeled seal, and it is easily found that the film has been peeled after being bonded once. Further, by forming a colored layer as a lower layer, the seal can be colored without adversely affecting the change in the color of the transmitted light or the reflected light, and the seal can be more easily viewed and the type of the color can be selected.

Further, by forming the release layer into a pattern such as a specific pattern, mark, or character, a specific pattern having the characteristics of the transparent vapor-deposited layer can be formed.

As described above, the anti-counterfeiting effect is extremely high.
This is an excellent effect not found in the conventional brittle seal.

[Brief description of the drawings]

FIGS. 1A and 1B are cross-sectional views showing a configuration of a transparent hologram seal of the present invention.

FIGS. 2A and 2B are cross-sectional views illustrating a configuration of a transparent hologram seal according to another embodiment of the present invention.

FIGS. 3A and 3B are cross-sectional views illustrating a configuration of a transparent hologram seal according to another embodiment of the present invention.

FIGS. 4A and 4B are cross-sectional views showing another configuration of the transparent hologram seal in FIG.

FIGS. 5A and 5B are cross-sectional views showing a state before and after peeling of the transparent hologram seal 11 of the present invention shown in FIG. 2;

FIG. 6 is a graph showing a visible spectrum of a transparent vapor deposited layer formed by the transparent hologram seal of the present invention in Example 1.

FIG. 7 is a graph showing a visible spectrum of a transparent vapor deposited layer formed by the transparent hologram seal of the present invention in Example 4.

FIG. 8 is a graph showing a visible spectrum of a transparent hologram seal as Comparative Example 1 with respect to the transparent hologram seal of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 11, 21 Transparent hologram seal 2 Base material 3 Hologram forming layer 4 Transparent vapor deposition layer 5 Adhesive layer 6 Low refractive index layer 7 High refractive index layer 8 Release layer 9 Colored layer 10 Adhesive anchor layer 12 Anti-counterfeiting pattern 13 Adhesive

────────────────────────────────────────────────── ─── Continuing on the front page (72) Kazuhisa Hoshino 1-5-1 Taito, Taito-ku, Tokyo Toppan Printing Co., Ltd. (72) Fuminobu Noguchi 1-1-5-1 Taito, Taito-ku, Tokyo Toppan Inside Printing Co., Ltd. (72) Inventor Satoshi Kitamura 1-1-1, Taito, Taito-ku, Tokyo Toppan Printing Co., Ltd. Examiner Fukusaburo Matsuzawa (56) References JP-A-4-142076 (JP, A) 5-3333782 (JP, A) Japanese Utility Model 4-98075 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) G09F 3/02 B32B 7/00 B32B 27/00 C09J 7 / 02 G03H 1/02

Claims (15)

(57) [Claims] 1. A transparent hologram seal in which a hologram forming layer, a transparent vapor deposition layer, and an adhesive layer are sequentially provided on a base material, wherein the transparent vapor deposition layer is formed by laminating a plurality of ceramic materials having different refractive indexes. Features a transparent hologram seal. 2. A transparent hologram seal in which a release layer, a hologram-forming layer, a transparent vapor-deposited layer, and an adhesive layer are provided on a substrate, wherein the transparent vapor-deposited layer is formed by laminating a plurality of ceramic materials having different refractive indexes. A transparent hologram seal characterized in that: 3. A transparent hologram seal in which a hologram forming layer, a transparent vapor-deposited layer, a release layer, and an adhesive layer are provided on a substrate, wherein the transparent vapor-deposited layer is formed by laminating a plurality of ceramic materials having different refractive indexes. A transparent hologram seal characterized in that: 4. The transparent hologram seal according to claim 1, wherein said transparent vapor-deposited layer comprises a combination of a high refractive index layer and a low refractive index layer. 5. The transparent evaporation layer according to claim 4, wherein the transparent evaporation layer is made of a ceramic material having a different refractive index, and a combination of a high refractive index layer and a low refractive index layer is alternately arranged. Transparent hologram seal. 6. The transparent vapor-deposited layer is made of magnesium fluoride, silicon dioxide, calcium fluoride, cerium fluoride,
5. The transparent hologram seal according to claim 4, comprising a combination of any one of aluminum fluoride, aluminum oxide and magnesium oxide and zinc sulfide. 7. The method according to claim 7, wherein the transparent vapor-deposited layer comprises magnesium fluoride, silicon dioxide, calcium fluoride, cerium fluoride,
The transparent hologram seal according to claim 4, comprising a combination of any one of aluminum fluoride, aluminum oxide, and magnesium oxide with zirconium dioxide. 8. The transparent vapor-deposited layer is made of magnesium fluoride, silicon dioxide, calcium fluoride, cerium fluoride,
The transparent hologram seal according to claim 4, comprising a combination of any one of aluminum fluoride, aluminum oxide and magnesium oxide and titanium dioxide. 9. The transparent vapor-deposited layer is made of magnesium fluoride, silicon dioxide, calcium fluoride, cerium fluoride,
5. The transparent hologram seal according to claim 4, comprising a combination of any one of aluminum fluoride, aluminum oxide and magnesium oxide and cerium dioxide. 10. The transparent vapor-deposited layer is made of magnesium fluoride, silicon dioxide, calcium fluoride, cerium fluoride,
The transparent hologram seal according to claim 4, comprising a combination of any one of aluminum fluoride, aluminum oxide, and magnesium oxide with tantalum oxide. 11. The transparent vapor-deposited layer is made of magnesium fluoride, silicon dioxide, calcium fluoride, cerium fluoride,
5. The transparent hologram seal according to claim 4, comprising a combination of any one of aluminum fluoride, aluminum oxide and magnesium oxide and zinc oxide. 12. The transparent vapor-deposited layer is made of magnesium fluoride, silicon dioxide, calcium fluoride, cerium fluoride,
5. The transparent hologram seal according to claim 4, comprising a combination of any one of aluminum fluoride, aluminum oxide and magnesium oxide and indium oxide. 13. The transparent hologram seal according to claim 1, wherein an adhesive anchor layer is laminated between the transparent vapor-deposited layer and the adhesive layer. 14. The transparent hologram seal according to claim 1, wherein a colored layer is provided on a surface of the transparent vapor-deposited layer on the side of the adhesive layer. 15. The transparent hologram seal according to claim 1, wherein the release layer is formed partially or in a pattern.