KR20010006868A - Anti-counterfeiting adhesive seal and method for manufacturing the same - Google Patents

Abstract

PURPOSE: To provide an adhesive seal using a hologram useful to prevent forgery and identifying a forged article from a genuine article and having much decorativeness. CONSTITUTION: The forgery preventive adhesive seal 2 comprises a hologram layer 4 capable of reproducing an image by utilizing an incident light, a retro- reflecting material layer 6 for feeding back the incident light in an incident light entering direction, and an adhesive layer 8 for laminating an article to be sequentially laminated. In this case, the layer 4 reproduces a multiple exposure type in which rainbow hologram images of a two-dimensional image and a three-dimensional image are reproduced by emitting a white light from a specific direction at a specific angle, and the hologram image is erased or new Fourier transformed hologram image is reproduced by emitting a laser beam from a specific direction at a specific angle. The layer 6 has an interference substance layer made of a mica powder covering with an Li-Co-Ti composite oxide represented by a formula Li0.5-xCo0.5-x£Li0.5-xCoxTi1.5|O1 (0<X<0.1) for creating a colored interference color and transparent infinitesimal balls aligned and disposed on the substance layer.

Description

Anti-counterfeiting adhesive seal and its manufacturing method {ANTI-COUNTERFEITING ADHESIVE SEAL AND METHOD FOR MANUFACTURING THE SAME}

This application is based on the priority claim of Japanese Patent Application No. 083991 filed March 26, 1999.

The present invention relates to an improvement of the authenticity discrimination method by using an anti-counterfeiting adhesive seal, especially a hologram sheet, which is attached for the purpose of anti-counterfeiting.

A product manufactured by a particular company trusts and values the product by the company name attached to the product. In addition, such company names stimulate consumer brand orientation and create new added value.

However, there is a desire to gain profit by improperly giving a product a company name that has gained consumer trust and brand orientation. For this reason, counterfeit products entering the market are often of poor quality, and this is a great problem for companies, as it will undermine the trust of consumers obtained through much effort.

Therefore, in order to avoid such a problem, a company is trying to prevent the distribution of counterfeits by giving a product a technology that makes counterfeiting difficult and a technology that distinguishes genuine and counterfeit products.

Thus, there is a hologram which is given to a product for the purpose of preventing forgery. Holograms are obtained by projecting stereoscopic images using interference of light, but they are expensive to manufacture and prepare, require advanced techniques, and are difficult to copy. Therefore, holograms are also used for documents such as gold stamps and certificates.

Conventionally, holograms that have been used for anti-counterfeiting have been generally used to reproduce stereoscopic images with white light, and have a design like rainbow hologram with high designability since they have a rainbow-like color.

However, since the rainbow hologram is reproducible, the hologram image can be observed by irradiating light at an appropriate angle, and it is not necessarily impossible to simulate the hologram image.

Furthermore, with the recent advances in computer processing technology, if the hologram image can be observed, the interference fringes obtained by reproducing the hologram image by a computer can be calculated, and it is not difficult to produce hologram embosses and the like from the interference fringes. .

Therefore, the importance of holograms in the anti-counterfeiting and authenticity is significantly reduced.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a pressure-sensitive seal using a hologram that is useful for preventing forgery and discrimination between genuine and forged products, and a decorative method thereof.

1 is a cross-sectional view showing a schematic configuration of the anti-counterfeiting adhesive seal in the present invention.

2 is an explanatory diagram showing a general manufacturing method of a hologram.

3 is an explanatory diagram for explaining the relationship between the reproduction image of the hologram, the angle between the object light and the reference light.

4 is an explanatory view of a Fourier transform hologram manufacturing method.

5 is a schematic cross-sectional view of an embodiment of a retroreflective layer of the present invention.

Figure 6 is a cross-sectional view of the anti-counterfeiting adhesive seal completed in the manufacturing example.

7 is an explanatory diagram showing an example of a reproduced image reproduced by white light.

8 is an explanatory diagram showing an example of a reproduced image reproduced by laser light.

[Description of Drawing Reference]

2: anti-counterfeiting adhesive seal 4: hologram layer

6: retroreflective material layer 8: adhesive layer

12: object 14: interference light

16: photosensitive recording medium 16 ': hologram

18: object wave 20: light source

22: reference wave 24: reproduction light

26: phase 28: observer

30: reflective layer 32: object

34: object light 36: reference light

38: object 40: object light

42: reference light 44: reproduction light

46: playback image 48: playback light

50: playback image 52: object light

54: reference light 56: object

58 lens 60 laser light

62: recording material 64: reference light

66: recording object 68: recording material

70: reference light source 72: object light source

74: recording material 78: retroreflective layer

80: substrate 82: coated mica

84 transparent microsphere 86 coating layer

88: mica 90: earth

92: pressure-sensitive adhesive layer 94: retroreflective material

96: transparent hologram 98: protective layer

100: anti-counterfeiting adhesive seal 104: cylindrical

106: red laser light 108: frosted glass

The anti-counterfeiting adhesive seal according to the present invention for achieving the above object is a hologram layer capable of reproducing an image using incident light, a retroreflective material layer for returning incident light in the incident light entry direction, and an adhesive layer for attaching to an article In the laminated seal, the hologram layer can reproduce the 2D and 3D rainbow hologram images when the white light is irradiated at a certain angle from a specific direction, and when the laser light is irradiated at a specific angle from the specific direction, the rainbow hologram image is changed. It is a multi-exposure hologram layer that disappears and can reproduce a new Fourier transform hologram image, and the retroreflective material layer is a general formula that produces colored interference colors on a substrate. Li _{0.5 + X} Co _0.5-X [Li _0.5-X Co _X Ti _1.5 ] O ₄ , an interference material layer of mica powder coated with a Li-Co-Ti-based composite oxide represented by (0 <X <0.1) and aligned thereon It is characterized by a transparent microspheres.

In addition, the anti-counterfeiting adhesive seal according to the present invention is a seal in which a hologram layer capable of reproducing an image using incident light, a retroreflective material layer for returning incident light in the incident light entry direction, and an adhesive layer for affixing to an article are laminated. The hologram layer is capable of reproducing 2D and 3D rainbow hologram images when the white light is irradiated at a specific angle from a specific direction, and reproducing a Fourier transform hologram image when the laser light is irradiated at a specific angle from the specific direction. Fourier transform holograms are laminated, and the retroreflective material layer has a general formula Li _{0.5 + X} Co _0.5-X [Li _0.5-X Co _X Ti _1.5 ] O ₄ (0 <X <0.1) An interference material layer made of mica powder coated with a Li-Co-Ti-based composite oxide represented by &lt; RTI ID = 0.0 &gt;

In the present invention, it is preferable that the interference fringes of the hologram layer recorded by multiple exposure on a plurality of hologram images are recorded by irregularities.

In the present invention, the hologram layer is a transparent hologram sheet capable of reproducing a hologram image with white light and a transparent hologram sheet capable of reproducing a hologram image with laser light, and preferably formed by stacking at least the two hologram sheets.

In the present invention, the hologram sheet capable of reproducing the hologram image with the white light is preferably formed by stacking two or more transparent hologram sheets having different hologram images.

Moreover, in this invention, it is preferable that the said transparent hologram sheet has at least 1 reflective layer.

In the present invention, the substrate of the retroreflective material layer is preferably made of one of metal, fabric, paper, and resin film.

In the present invention, it is preferable that the anti-counterfeiting adhesive seal has a protective layer made of a resin film for protecting the surface of the hologram layer and a base for protecting the surface of the pressure-sensitive adhesive layer.

In addition, the manufacturing method of the anti-counterfeiting adhesive seal according to the present invention includes a hologram layer capable of reproducing an image using incident light, a retroreflective material layer for returning incident light in the incident light entry direction, and an adhesive layer for attaching the article to the article. In the method of manufacturing a laminated seal, a plurality of interference stripes as rainbow holograms capable of reproducing 2D and 3D rainbow hologram images by white light and interference stripes as Fourier transform holograms capable of reproducing images by red laser light are provided. A process of creating a recorded master hologram, a process of creating a hologram film from resin formation from the master hologram, a process of creating a transparent hologram sheet by forming a metal oxide on one side of the hologram film, and a general formula causing colored interference color _{0.5 + X Co 0.5-X [Li} 0.5-X Co X Ti 1.5] O 4 (0 A process of forming an interference material layer by applying an ink or paint mixed with an interference material made of mica powder coated with a Li-Co-Ti-based composite oxide represented by X <0.1) and a resin onto a substrate, wherein the interference material layer Forming a retroreflective material layer by attaching transparent microspheres made of glass to the substrate, forming a pressure-sensitive adhesive layer on the back surface of the retroreflective material layer, and laminating and fixing the transparent hologram sheet on the retroreflective material layer. It is done.

In addition, the manufacturing method of the anti-counterfeiting adhesive seal according to the present invention includes a hologram layer capable of reproducing an image using incident light, a retroreflective material layer for returning incident light in the incident light entry direction, and an adhesive layer for attaching the article to the article. In the method of manufacturing a laminated seal, a master hologram recording an interference stripe as a rainbow hologram capable of reproducing 2D and 3D rainbow hologram images by white light, and interference as a Fourier transform hologram capable of reproducing images by red laser light. A process of creating a master hologram recording stripes, a process of creating each hologram film by resin formation from the master hologram, a process of forming a transparent hologram sheet by forming a metal oxide on at least one side of the hologram film, and colored Causing interference color Bansik the _{Li 0.5 + X Co 0.5-X} [Li 0.5-X Co X Ti 1.5] O 4 (0 <X <0.1) with a mica powder coated with a Li-Co-Ti-based composite oxide represented by the interfering substance and Applying an ink or paint mixed with resin onto a substrate to form an interference material layer; attaching transparent microspheres made of glass to the interference material layer to form a retroreflective material layer; and on the back surface of the retroreflective material layer. And a step of forming an adhesive layer and a step of laminating a plurality of transparent hologram sheets on the retroreflective material layer.

Moreover, in this invention, it is preferable to have the process of fixing the protective layer which consists of resin films on the upper surface of the said transparent hologram sheet, and the process of fixing the earth to the lower surface of the said adhesive layer.

The present invention is made of a seal which can be attached to a product or the like, and since the seal has a hologram, it is very difficult to forge this seal by the useful property exhibited by the hologram, and whether the product to which the seal is attached is forged by a specific means. It is the anti-counterfeiting adhesive seal which can be distinguished by the seal to determine whether it is genuine.

Hereinafter, the anti-counterfeiting adhesive seal of this invention is demonstrated in detail using one Embodiment of this invention.

1 is a cross-sectional view showing a schematic configuration of the anti-counterfeiting adhesive seal in the present invention.

As shown in Figure 1, the anti-counterfeiting adhesive seal 2 in the present invention is a hologram layer 4 that can reproduce the image using the incident light and the retroreflective material layer for returning the incident light in the incident light entry direction ( 6) and an adhesive layer 8 for affixing to an article are laminated | stacked.

The hologram layer 4 is a multi-exposure of the interference stripes on a plurality of holograms when the white light is irradiated at a certain angle from the specific direction, the 2D image and the 3D image can be reproduced as a rainbow hologram image, the laser light is specified from the specific direction When irradiated at an angle, it is a multi-exposure transparent hologram layer in which a visible image can be reproduced by an interference stripe formed by a Fourier transform pattern of a recording.

The retroreflective material layer 6 is formed of an interference material layer made of Li ₂ CoTi ₃ O ₈ coated mica powder, which causes colored interference colors, and aligned microscopic spheres, and is disposed between the hologram layer and the pressure-sensitive adhesive layer.

In addition, in the present specification, the 2D image obtained by reproducing the hologram layer does not mean a planar image as depicted on the ground, but means a stereoscopic planar image protruding from the plane of the hologram layer and showing a plan view in space. It refers to a three-dimensional image protruding from the plane of the hologram layer.

Hereinafter, the characteristic hologram layer and the retroreflective material layer in this invention are demonstrated in detail.

Hologram layer

2 is an explanatory diagram showing a general manufacturing method of a hologram. The general manufacturing method of a hologram is demonstrated with reference to FIG.

As shown in FIG. 2A, an interference light 14 is irradiated to an object 12, and the reflected wave from the object is recorded on the photosensitive recording medium 16. As shown in FIG. The reflected wave in this object is called the object wave 18. When recording the object wave 18 with the photosensitive recording medium 16, a light source 20 or the like emitting light having the same wavelength as that of the interference light 14 is placed next to the object, and the photosensitive recording is performed directly without passing the light through the object. To medium (16). This light will be referred to as reference light 22. On the photosensitive recording medium 16, an interference diagram due to the superposition of the object wave 18 and the reference wave 22 is recorded. This interference diagram contains complete information of both the amplitude and phase of the object wave, although the photosensitive recording medium 16 responds only to the light intensity.

This interference figure is completely different from the original object and has a thin stripe irregular shape. This photosensitive recording medium 16 is developed, and as shown in Fig. 2B, a hologram in which reproduction light 24 having the same wavelength is developed at the same angle as the reference wave 22 is developed on the photosensitive recording medium 16 ( 16 '), the light transmitted through the film on which the interference figure is recorded reproduces the image 26 of the object 12, and the observer 28 looks as if the object 12 is there. (26) can be observed.

When a photoresist and a thermoplastic are used as the photosensitive recording medium, interference stripes are recorded as irregularities on the surface, and mass production of holograms is also possible by creating an emboss type or the like based on the irregularities.

In addition, here, an object may be actually used to create a hologram or an interference figure generated by a computer or the like. By recording this interference figure on a transparent material or the like, a hologram as described above is created and obtained.

Since the anti-counterfeiting adhesive seal of the present invention is affixed to the product, it is not possible to irradiate regenerated light from the back side as shown in FIG. Therefore, as shown in Fig. 2C, the hologram image 26 can be reproduced by making the reflective layer 30 on the back surface of the hologram and reflecting the light irradiated from the surface side.

The reflective layer is formed by depositing a light reflective metal and a metal oxide. When 100% of the light reflective metal is deposited, almost all light incident on the hologram is reflected, but the deposited metal oxide is highly transparent and translucent to transparent. It becomes a hologram sheet.

In this embodiment, the hologram layer 4 is a transparent hologram sheet in which a hologram embossed layer to which hologram embossed is applied and a reflective layer in which metal oxides are deposited are laminated.

As described above, in order to reproduce the hologram, light of the same wavelength as when recorded is required, but a rainbow hologram is a hologram that enables reproduction of a reproduced image with white light. The transparent hologram layer 4 of the anti-counterfeiting adhesive seal according to the present invention acts as a rainbow hologram when white light is irradiated as described above, so that the image can be reproduced even under white light. At the time of sticking, the designability of the product can be impaired or the designability of the product can be improved.

As a property of the hologram, if the angle or direction of the reference light with respect to the object light is recorded at the time of recording, the reproduced image to be reproduced when the angle or direction of the reproduction light is irradiated is changed.

3 is an explanatory diagram for explaining an angle relationship between a reproduced image of a hologram, an object light, and a reference light.

As shown in FIG. 3A, for example, the angle between the object light 34 and the reference light 36 is recorded at 20 degrees during hologram recording of the object 32. At this time, the incident allowable angle of the reproduced light obtained by reproducing the hologram is ± 5 degrees of the incident angle of the reference light. Subsequently, as shown in Fig. 3B, the recording object 32 of (a) is replaced with the object 38, and the angle between the object light 40 and the reference light 42 is recorded at 35 degrees. The wavelengths of the object lights 34 and 40 and the reference lights 36 and 42 are the same for (a) and (b). The hologram manufactured as described above reproduces the reproduced image of the object 32 recorded in (a) when the reproduced light 44 is irradiated in the range of ± 5 degrees at the same angle as the reference light 36 in (a). When (46) is reproduced and irradiated with the reproduction light 48 in the range of ± 5 degrees of the same angle as the reference light 42 of (b) as shown in (d), reproduction of the object 38 recorded in (b) The video 50 is played back.

Furthermore, even if the irradiation angle is the same, as shown in (e), when the recording object is recorded by changing the irradiation direction of the reference light 54 when observed in the irradiation direction of the object light 52, the irradiation direction irradiated with the reproduction light is changed. This allows other figures to be played back.

In the present embodiment, the transparent hologram layer 4 is subjected to multiple exposure in this manner. Therefore, the reproduced video to be reproduced by changing the reproduction light irradiation angle and the irradiation direction is different. Therefore, a seal with high designability can be obtained, and it becomes difficult to copy the hologram and to make a duplicate.

In addition, although there are various recording formats of the hologram, the recording format on the hologram that can be reproduced under the white light in this embodiment can also use a Fourier transform hologram to be described later.

Furthermore, a feature of the present invention is that the hologram reproduction image which cannot be observed under white light is multi-exposured to the hologram layer. In this embodiment, the hologram layer 4 acts as a Fourier transform hologram when irradiated with laser light, and the hologram image reproduced under white light disappears, and is multi-exposure so that a new hologram reproduction image is reproduced by the laser light.

4 is an explanatory view of a Fourier transform hologram manufacturing method.

In the method shown in (a) of FIG. 4, the object 56 recorded on the hologram uses that recorded on a plane object such as a slide. The object 56 recorded on the hologram is placed on the front focal plane separated by the focal length f of the lens 58, irradiated with the parallel laser light 60, and the recording material 62 is the focal length of the lens 58. Place it on the back focal plane separated by f. The reference light 64 also uses parallel light. The hologram recorded in this way produces a Fourier transform pattern of the object recorded on the recording material surface.

In addition, although the case where a lens is used in FIG. 4A has been described, a Fourier transform hologram can be created without using a lens.

In the recording method as shown in Fig. 2, as shown in Fig. 4B, the recording object 66 is far enough from the surface of the recording material 68, and as shown in Fig. 4C. The hologram recorded by arranging the light source 70 and the object light source 72 at the same distance D from the recording material 74 has the same characteristics as the Fourier transform hologram. The former is called Fraunhofer hologram and the latter is called lensless Fourier transform hologram.

The Fourier transform hologram exhibits unique properties by double exposure of the recorded image. In Fig. 4, after recording one recording object, it is replaced with another object and recorded again. When the double-exposure hologram is reproduced as described above, the stereoscopic image is obtained as the sum of amplitudes of the two objects. If the phase of the reference light is changed by one-half wavelength using either phase plate in either of the two recordings, the stereoscopic image is obtained as the amplitude difference between the two objects.

In addition, the Fourier transform hologram has a property that a stereoscopic image is reproduced when reproduced at the same wavefront as the reference light, but the image does not move even when the hologram is moved in the plane. Therefore, in the present embodiment, since the Fourier transform hologram is not a rainbow hologram that can be reproduced by white light, the reproduced image is not reproduced unless the laser light is irradiated.

Retroreflective layer

Next, the retroreflective material layer which characterizes the anti-counterfeiting adhesive seal of this invention is demonstrated.

The retroreflective material layer of the anti-counterfeiting adhesive seal of the present invention is composed of an interference material layer made of a Li-Co-Ti-based composite oxide-coated mica powder which causes colored interference colors and transparent microspheres.

5 is a schematic cross-sectional view of an embodiment of a retroreflective layer of the present invention. In the present embodiment, the retroreflective layer 78 has a Li ₂ CoTi ₃ O ₈ coated mica 82 disposed on the substrate 80, and the substrate is constituted by a reflective metal plate or a reflective metal deposition layer. In the substrate, the substrate may not necessarily have reflectivity, and may be a cloth or a film. This is because the Li ₂ CoTi ₃ O ₈ coated mica powder used in the interference material layer has a high refractive index and sufficient light reflectivity.

The transparent microspheres 84 have a role of generally returning the returned light in the incident light entry direction when the incident light returns. The interference material layer that causes colored interference colors is provided with a color by configuring a conventional retroreflective material to be a silver reflecting layer made of a metal plate and a metal deposition layer or reflecting only a specific wavelength of light by a paint or the like. The reflector gives color to the returned light by using the interference of light. Therefore, the utilization efficiency of light is very high.

In the present embodiment, Li ₂ CoTi ₃ O ₈ coated mica 82 is used as the interference material layer as described above. Light transmitted through the transparent microspheres 84 is reflected on the surface of the coating layer 86 and the surface of the mica 88 of the Li ₂ CoTi ₃ O ₈ coated mica 82, and is caused by the optical path difference due to the layer thickness of the coating layer 86. Cause interference. Therefore, any color tone can be obtained by adjusting the layer thickness of Li ₂ CoTi ₃ O ₈ . Furthermore, the material causing interference color is Li ₂ CoTi ₃ O ₈ coated mica, which is a chemically and optically stable inorganic material, and thus can be a retroreflective layer having excellent heat resistance and time resistance. The use of such a retroreflective material for the anti-counterfeiting adhesive seal of the present invention is obtained by giving a variety of color tones by the interference material, and the optical path difference in the interference material varies depending on the direction of incidence of light due to the retroreflectivity, and the color represented by the interference material This is to prevent the change.

In addition, security can be improved by using such a retroreflective material. In the present invention, the retroreflective layer does not cause interference colors in the retroreflective material under general illumination such as fluorescent lamps and light irradiated with a conventional light source such as under sunlight. This is because the directionality of the incident light is not constant, and the interference colors generated by the light incident in each direction by the incident light in various directions are unjustly added to each other. Therefore, under ordinary light, the retroreflective layer of the present invention exhibits a color tone of the appearance color of the interference material layer.

However, when the direction of the incident light is irradiated in a predetermined direction, the interference layer of the present invention exhibits the color generated by the interference of the incident light. The light which made this directionality correspond to a fixed direction is called a linear light here. The linear light has the same directionality of the light, and the wavelength is different from the laser light because various things exist.

Therefore, by changing the color of the interference material used in the interference material layer from the color of the interference reflective layer adjusted by the thickness of the coating layer of the interference material, the color of the color of the retroreflective layer is different from the irradiated light.

Thus, since the retroreflective layer used for this invention shows a different color tone under normal light and under linear light, discrimination of counterfeit goods and genuine goods can be made to some extent by irradiating the color light indicated by irradiating linear light. Therefore, in general, since the seal of the present invention is usually observed only under light conditions, since it is not known that the color tone is changed by irradiating such rays except the person concerned, it is useful as hidden information and difficult to counterfeit like holograms.

In the above, each part of the seal of this invention was demonstrated in detail with reference to one Embodiment of the anti-counterfeiting adhesive seal of this invention.

The anti-counterfeiting adhesive seal in the present invention is to form each layer by selecting a suitable material in consideration of adhesiveness, heat resistance, weather resistance, chemical resistance, etc. according to the product and its use. General printing such as paper, rough paper, E-layer, UV printing, UV varnish, UV coated paper, press coated paper, various laminated paper by PVC, PP, PET, etc., soft, hard, foamed vinyl, etc. Plastic, such as vinyl, ABS, AS, HiPS, AC, PP, PET, bookbinding, albums, T-shirts, fabrics, etc. It can be used in various materials such as leather, glass, metal, woodworking. In addition, the material obtained using the present invention is not limited to those listed here.

Next, the manufacturing example of the anti-counterfeiting adhesive seal of this invention is demonstrated.

Preparation Example 1

Interference stripes such as a rainbow hologram capable of reproducing a reproduced image by white light and interference stripes as a Fourier transform hologram capable of reproducing a reproduced image only by a red laser light are used as a master hologram, and an interference stripe such as a master hologram is used. A hologram film obtained by reproducing a reproduced image such as a master hologram was prepared by recording the.

Titanium dioxide was deposited on this film, and the transparent hologram sheet was created.

This transparent hologram sheet is obtained by reproducing a reproduced video mainly by green light under white light under white light, and is a hologram obtained by observing four kinds of different reproduced images when the irradiation direction of the reproduced light is changed, and only when a red laser is irradiated. It was a hologram obtained by observing this one kind.

Subsequently, screen printing ink for transparent colored screen printing in which a fabric made of white acrylic fibers was used as a base, and mixed Li ₂ CoTi ₃ O ₈ coated mica with an acrylic resin solution was screen printed thereon, and the refractive index was 1.9 and 200-250 mesh. Phosphorus transparent glass fine particles were dispersed and adhered and dried to prevent the hemisphere or more from being buried to prepare a retroreflective layer. This retroreflective layer usually exhibited an external color of green to blue as a source of light, and an interference color of red to purple as a source of linear light.

As described above, by separately stacking the transparent hologram sheet and the retroreflective material layer to improve the anti-counterfeiting adhesive seal. 6 is a cross-sectional view of the completed anti-counterfeiting adhesive seal. The manufacturing process will be described with reference to FIG.

First, the adhesive layer 92 was provided on the board | substrate 90, and the base material side of the retroreflective material 94 was fixed to the adhesive layer 92 on it. Then, a silicone resin solution was applied to the entire surface on the transparent microspheres of the fixed retroreflective material 94, and the transparent hologram 96 was laminated and fixed when the resin was not dried. Moreover, in order to protect this hologram sheet, the polyethylene terephthalate film was fixed on the transparent hologram 96 as a protective layer 98, and the anti-counterfeiting adhesive seal 100 of this invention was obtained.

When the obtained seal was affixed to the product and observed, when the light source was incident in a state where the hologram image was not reproduced as a source of white light, greenish-blue tones represented by interference materials of the retroreflective layer were observed. When the product was tilted and the incidence direction and incidence angle of the white light were changed, the reproduced image reproduced by the green light was observed together with the rainbow light reflected by the rainbow hologram. In addition, when white light is incident from various angles and directions, other regenerated images may be observed in the transparent hologram. 7 shows a reproduced image reproduced by white light.

Arrows shown in each of Figs. 7A, 7B, 7C, and 3D show the irradiation direction of incident light. When white light was incident in different directions, four different playback images were observed on the anti-counterfeiting seal. (a) to (c) are reproduced as 2D images because of the character information, but because the holograms can reproduce as stereoscopic images, they are reproduced as if the characters protrude from the seal surface and float in space. In addition, (d) is reproduced as a 3D object image because it is figure information.

In addition, the anti-counterfeiting adhesive seal prepared in the present example was able to obtain a very clear reproduction image because the wavelength of the light obtained by reproducing the regenerated image of the transparent hologram is almost the same as the wavelength of the color tone indicating the external color of the retroreflective layer.

However, even if the white light is incident at any angle and direction, the reproduced image obtained by reproducing only by the laser light cannot be reproduced, and if the holographic image obtained by reproducing by the laser light is present in the transparent hologram, the existence of the image is confirmed. Sudan had nothing. In addition, since the white light is linear light, the color tone of the retroreflective layer also indicates the appearance color of the interference material and does not indicate the interference color.

When the red laser light was irradiated, the reproduced image reproduced by the white light disappeared. This is because the transparent hologram sheet reproduces the reproduced image by selecting a specific wavelength light from the white light, the laser light has a very narrow wavelength range present in the irradiated light, and includes a wavelength required to reproduce the reproduced image of the transparent hologram sheet. Because it does not. When the irradiation direction and the irradiation angle of the laser were changed, the transparent hologram acted as a Fourier transform hologram, and a new reproduced image which was not observed under white light was clearly observed.

8 is a schematic diagram of reproducing a transparent hologram sheet with a laser beam.

As shown in FIG. 8A, the cylindrical object 104 is covered with the seal 100, and the red laser light source 106 is set in the red laser light entrance port provided in a part of the cylindrical object 104. A frosted glass 108 serving as a screen is fitted to the upper end of the cylindrical object 104. When the red laser is irradiated to the seal 100 by the red laser light source 106, a regenerated image by the transparent hologram sheet is drawn. As shown in 8 (b), it floated on the frosted glass 108.

When the irradiation of the red laser was stopped, the reproduced image reproduced by the laser light disappeared, and it was not known that such a hologram image existed.

In addition, when linear light was irradiated to the seal 100, the color tone of the seal was changed from green to blue color to red to purple color.

Incidentally, in the present embodiment and the present production example, the hologram interference stripes obtained by reproducing under white light and the hologram interference stripes reproduced under laser light are recorded in one transparent hologram, but the present invention is not limited thereto. The hologram obtained by reproducing under white light and the hologram regenerated under laser light may be separately prepared and stacked. In addition, four hologram sheets for reproducing each reproduced image (a) to (d) as shown in FIG. 7 may be laminated, and in addition, a hologram sheet reproduced under laser light may be laminated. However, in the case where a plurality of holograms are stacked in this way, care must be taken so that the hologram image is not regenerated in the seal.

In the case of stacking a plurality of holograms in this manner, each hologram may have its own reflective layer, or only a lowermost hologram may be provided with a reflective layer acting as a reflective layer on the entire hologram. However, when each hologram has its own reflective layer, it needs to be a transparent hologram using a metal oxide in the reflective layer.

Preparation Example 2

Each of the holograms shown in Figs. 7A, 7B, 7C, and 4D is recorded on four recording materials and a red laser beam on which interference fringes are recorded as rainbow holograms that can be reproduced by white light. Five hologram films obtained by reproducing a reproduced image such as a master hologram by using a recording material recorded as an interference stripe as a Fourier transform hologram capable of reproducing a reproduced image only as a master hologram, and recording an interference strip such as a master hologram. Created.

This film was laminated | stacked so that the irradiation direction of a reproducible light which can reproduce | reproduce an image, and an irradiation angle might not overlap, titanium dioxide was deposited on the film laminated | stacked on the lowest layer, and the transparent hologram sheet was produced.

This transparent hologram sheet is obtained by reproducing a reproduced video mainly by green light under white light under white light. Also, by changing the irradiation direction of the reproduced light, this transparent hologram sheet is a hologram obtained by observing four different reproduced images, and only a specific reproduced video when red laser is irradiated. It was a hologram obtained by observing this one kind.

Subsequently, screen printing ink for transparent colored screen printing in which a fabric made of white acrylic fibers was used as a base, and mixed Li ₂ CoTi ₃ O ₈ coated mica with an acrylic resin solution was screen printed thereon, and the refractive index was 1.9 and 200-250 mesh. Phosphorus transparent glass fine particles were dispersed and adhered and dried to prevent the hemisphere or more from being buried to prepare a retroreflective layer. This retroreflective layer usually exhibited an external color of green to blue as a source of light, and an interference color of red to purple as a source of linear light.

Subsequently, an adhesive layer was provided on the earth, and the base material side of the retroreflective material was fixed to the adhesive layer thereon. Then, a silicone resin solution was applied to the entire surface of the transparent microspheres of the fixed retroreflective material, and when the resin was dried so as not to flow, transparent holograms were laminated and fixed. Moreover, the polyethylene terephthalate film was fixed on the transparent hologram as a protective layer in order to protect this hologram sheet, and the anti-counterfeiting adhesive seal of this invention was obtained.

In addition, this invention is not limited only to manufacture example 1 and manufacture example 2 shown here.

As described above, the anti-counterfeiting adhesive seal according to the present invention has designability without degrading the designability of the product attached as a source of white light, and is reproduced by a reproduced image reproduced when the laser light is irradiated from a specific direction and angle. Genuine and counterfeit goods can be seen immediately.

In addition, since the hologram image obtained by reproducing a reproduced image only by laser light cannot know the wavelength, the irradiation direction and the angle of the reproducible light, except for the related person, it is difficult to forge the seal of the present invention.

In addition, since a seal in which a plurality of hologram images are recorded is more decorative and more difficult to forge than a seal using a conventional hologram.

In addition, since the hologram image is easily replaced by changing the recording, the hologram image can be freely selected.

In addition, since a seal containing a plurality of hologram images having different depths can be obtained by recording a plurality of hologram images, forging is more difficult and decorativeness can be made higher.

Moreover, since the base material of a retroreflective material can be selected freely, it does not damage the texture of the product to stick.

In addition, the protective layer and the earth on the upper and lower surfaces of the seal make it easy to store and transport the seal.

Moreover, according to the manufacturing method of the anti-counterfeiting adhesive seal of this invention, it is possible to manufacture the seal which is rich in a decoration, difficult to forge, and can easily manufacture the seal in which many hologram images with a different depth are contained.

Claims (11)

A seal in which a hologram layer capable of reproducing an image using incident light, a retroreflective material layer for returning incident light in the incident light entry direction, and an adhesive layer for affixing to an article are laminated. The hologram layer may reproduce a rainbow hologram image of 2D and 3D images by irradiating white light at a specific angle from a specific direction, and when the laser light is irradiated at a specific angle from a specific direction, the rainbow hologram image disappears and a new Fourier transform hologram image is generated. Multi-exposure hologram layer that can be reproduced, The retroreflective material layer is Li-Co-Ti represented by Li _{0.5 + X} Co _0.5-X [Li _0.5-X Co _X Ti _1.5 ] O ₄ (0 <X <0.1). An anti-counterfeiting adhesive seal comprising an interference material layer made of mica powder coated with a composite oxide and transparent microspheres arranged thereon. A seal in which a hologram layer capable of reproducing an image using incident light, a retroreflective material layer for returning incident light in the incident light entry direction, and an adhesive layer for affixing to an article are laminated. The hologram layer is capable of reproducing a rainbow hologram image that can reproduce 2D and 3D rainbow hologram images when irradiated with white light at a specific angle and a Fourier transform hologram image when laser light is irradiated at a specific angle from a specific direction. Fourier transform hologram is stacked, The retroreflective material layer is Li-Co-Ti represented by Li _{0.5 + X} Co _0.5-X [Li _0.5-X Co _X Ti _1.5 ] O ₄ (0 <X <0.1). An anti-counterfeiting adhesive seal comprising an interference material layer made of mica powder coated with a composite oxide and transparent microspheres arranged thereon. The anti-counterfeiting adhesive seal according to claim 1, wherein the hologram layer has a plurality of holograms recorded with interference stripes recorded by multiple exposure. 3. The hologram layer according to claim 2, wherein the hologram layer comprises a transparent hologram sheet capable of reproducing a hologram image with white light and a transparent hologram sheet capable of reproducing a hologram image with laser light, wherein at least the two hologram sheets are laminated. Anti-counterfeiting adhesive seal. The anti-counterfeiting adhesive seal according to claim 4, wherein the hologram sheet capable of reproducing a hologram image with white light is formed by stacking two or more transparent hologram sheets having different hologram images. The anti-counterfeiting adhesive seal according to claim 4, wherein the transparent hologram sheet has at least one reflective layer. The anti-counterfeiting adhesive seal according to claim 1 or 2, wherein the substrate of the retroreflective material layer is made of one of metal, fabric, paper and resin film. The forgery according to claim 1 or 2, wherein the anti-counterfeiting adhesive seal has a protective layer made of a resin film for protecting the surface of the hologram layer and a base for protecting the surface of the pressure-sensitive adhesive layer. Resistant adhesive seal. In the manufacturing method of the seal which laminated | stacked the hologram layer which can reproduce | regenerate an image using incident light, the retroreflective material layer which returns incident light to the incident light entrance direction, and the adhesive layer for affixing to an article, Creating a master hologram in which multiple interference stripes as rainbow holograms can reproduce 2D and 3D rainbow hologram images by white light and interference stripes as Fourier transform holograms can reproduce images by red laser light, A process of creating a hologram film by resin formation from the master hologram, Forming a transparent hologram sheet by forming a metal oxide on one side of the hologram film, Mica powder coated with Li-Co-Ti composite oxide represented by Li _{0.5 + X} Co _0.5-X [Li _0.5-X Co _X Ti _1.5 ] O ₄ (0 <X <0.1) Forming an interference material layer by applying an ink or paint mixed with an interference material and a resin on a substrate, Attaching transparent microspheres made of glass to the interference material layer to create a retroreflective material layer, Forming a pressure-sensitive adhesive layer on the back surface of the retroreflective material layer, Method of manufacturing a forgery-resistant adhesive seal, characterized in that consisting of the step of laminating and fixing the transparent hologram sheet on the retroreflective material layer. In the manufacturing method of the seal which laminated | stacked the hologram layer which can reproduce | regenerate an image using incident light, the retroreflective material layer which returns incident light to the incident light entrance direction, and the adhesive layer for affixing to an article, A master hologram recording interference stripes as a rainbow hologram that can reproduce 2D and 3D rainbow hologram images by white light, and a master hologram recording interference stripes as a Fourier transform hologram that can reproduce images by red laser light, respectively. fair, Creating each hologram film by resin formation from said master hologram, Forming a transparent hologram sheet by forming a metal oxide on at least one side of the hologram film, Mica powder coated with Li-Co-Ti composite oxide represented by Li _{0.5 + X} Co _0.5-X [Li _0.5-X Co _X Ti _1.5 ] O ₄ (0 <X <0.1) Forming an interference material layer by applying an ink or paint mixed with an interference material and a resin on a substrate, Attaching transparent microspheres made of glass to the interference material layer to create a retroreflective material layer, Forming a pressure-sensitive adhesive layer on the back surface of the retroreflective material layer, The method of manufacturing a forgery-resistant adhesive seal, characterized in that consisting of a step of fixing the plurality of transparent hologram sheet laminated on the retroreflective material layer. The anti-counterfeiting adhesive seal according to claim 9 or 10, further comprising a step of fixing a protective layer made of a resin film on an upper surface of the transparent hologram sheet, and a step of fixing an earth to a lower surface of the pressure sensitive adhesive layer. Manufacturing method.