JP2000272300A - Forgery preventive adhesive seal and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: 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. SOLUTION: 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

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-counterfeit pressure-sensitive adhesive sticker for preventing counterfeiting, and more particularly, to an improvement in a method of discriminating an authentic product by using a hologram sheet.

[0002]

2. Description of the Related Art Products manufactured by certain companies are:
Consumers trust and value the product by giving the company name to the product. In addition, such names can stimulate consumer brand orientation and create new added value.

[0003] However, there is a system that takes advantage of consumer trust and brand orientation, and tries to gain profit by giving a company name that has won the trust of consumers to products unfairly. Counterfeit products on the market due to this are often of very poor quality, causing the consumer to lose the trust they have won and become a major problem for businesses.

[0004] In order to avoid such a problem, companies try to prevent the distribution of counterfeit products by providing the products with technologies that make counterfeiting difficult or technologies for discriminating between genuine and counterfeit products.

[0005] A hologram is given to a product for the purpose of preventing forgery. Holograms can display stereoscopic images using light interference, but their production and preparation are expensive, require high technology, and are difficult to copy. It is also used for certificates such as.

[0006]

Conventionally, a hologram used to prevent forgery uses a hologram called a rainbow hologram which can reproduce a three-dimensional image with white light and emits a rainbow-like color and has a high design property. Things were common.

However, since a rainbow hologram can be reproduced with white light, a hologram image can be observed by irradiating light at an appropriate angle, and it is not always impossible to capture the hologram image. .

Further, with the recent improvement in computer processing technology, if a hologram image can be observed, an interference fringe capable of reproducing the hologram image can be calculated by a computer, and a hologram emboss or the like can be formed from the interference fringe. It is no longer difficult. For this reason, the importance of the hologram in preventing forgery and discriminating authentic products has been significantly reduced.

The present invention has been made in view of the above problems, and provides an adhesive seal using a hologram which is useful for preventing forgery, discriminating between a genuine product and a forgery product, and which is rich in decorativeness, and a method of manufacturing the same. The purpose is to:

[0010]

In order to achieve the above object, a forgery-preventing pressure-sensitive adhesive seal according to the present invention comprises a hologram layer capable of reproducing an image by utilizing incident light, The retroreflective material layer to be returned to the, and in the seal laminated adhesive layer for sticking to the article,
The hologram layer can reproduce a 2D image and a 3D image of a rainbow hologram image by irradiating white light at a specific angle from a specific direction, and the rainbow hologram image can be reproduced by irradiating a laser beam at a specific angle from a specific direction. Disappears and a new Fourier transform hologram image is reproducible, and is a multiple exposure type hologram layer, wherein the retroreflective material layer has a general formula of Li which causes a colored interference color on a substrate.
_{0.5+ X Co 0.5-X [Li} 0.5-X Co X Ti
_1.5 ] Li—Co represented by O ₄ (0 <X <0.1)
It is characterized by comprising an interference substance layer made of mica powder coated with a Ti-based composite oxide and transparent microspheres arranged and arranged thereon.

Also, a forgery prevention adhesive seal according to the present invention.
Is a hologram that can reproduce video using incident light
Layer and recursive return to return incident light in the direction of incident light
A shot material layer and an adhesive layer to be attached to the article were laminated
In the seal, the hologram layer transmits white light in a specific direction.
2D image and 3D image when illuminated at a specific angle from
Rainbow hologram that can reproduce the bow hologram image
When irradiating the laser beam at a specific angle from a specific direction
Fourier transform hologram capable of reproducing a Fourier transform hologram image
Wherein the retroreflective material layer comprises a substrate
The general formula that produces a colored interference color is Li_{0.5 + X}C
o_0.5-X[Li_0.5-XCo_XTi _1.5] O₄
Li-Co-Ti composite represented by (0 <X <0.1)
Interfering substance layer consisting of mica powder coated with oxide and its
Characterized by consisting of transparent microspheres aligned on top
You.

In the present invention, it is preferable that the hologram layer has interference fringes recorded by multiple exposure of a plurality of hologram images recorded by unevenness. In the present invention, the hologram layer includes a transparent hologram sheet capable of reproducing a hologram layer with white light and a transparent hologram sheet capable of reproducing a hologram image with a laser beam, and is formed by laminating at least the two hologram sheets. Is preferred. Further, in the present invention, it is preferable that the hologram sheet capable of reproducing the hologram image with the white light is formed by laminating two or more transparent hologram sheets having different hologram images.

In the present invention, it is preferable that the transparent hologram sheet has at least one reflection layer. In the present invention, it is preferable that the base material of the retroreflective material layer is made of one of metal, cloth, paper, and resin film. Further, in the present invention, the forgery prevention adhesive seal may include a protective layer made of a resin film for protecting the surface of the hologram layer, and a mount for protecting the surface of the adhesive layer. It is suitable.

Further, the method for manufacturing a forgery-preventing pressure-sensitive adhesive seal according to the present invention comprises a hologram layer capable of reproducing an image using incident light, and a retroreflective material layer for returning incident light in the incident light entering direction. In a method for producing a seal in which a pressure-sensitive adhesive layer to be attached to an article is laminated,
A step of creating a master hologram in which an interference fringe as a rainbow hologram capable of reproducing a rainbow hologram image of a D image and a 3D image and an interference fringe as a Fourier transform hologram capable of reproducing an image with a red laser beam are multiplexed; A step of forming a hologram film by resin formation from the master hologram, a step of forming a metal oxide on one surface of the hologram film to form a transparent hologram sheet, and a general formula for producing a colored interference color is L
i _{0.5 + X} Co _0.5-X [Li _0.5-X Co _X T
i _1.5 ] O ₄ (0 <X <0.1)
A step of applying an ink or paint obtained by mixing an interfering substance composed of mica powder coated with an o-Ti-based composite oxide and a resin on a base material to form an interfering substance layer, wherein the interfering substance layer is made of glass Forming a retroreflective material layer by attaching microspheres, forming an adhesive material 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 characterized by.

Further, the method for producing a forgery-preventing pressure-sensitive adhesive seal according to the present invention comprises a hologram layer capable of reproducing an image using incident light, and a retroreflective material layer for returning incident light in the incident light entering direction. In a method for producing a seal in which a pressure-sensitive adhesive layer to be attached to an article is laminated,
A master hologram that records interference fringes as a rainbow hologram that can reproduce a rainbow hologram image of a D image and a 3D image, and a master hologram that records interference fringes as a Fourier transform hologram that can reproduce a video using a red laser beam. Forming a hologram film by forming a resin from the master hologram; forming a metal oxide on at least one surface of the hologram film to form a transparent hologram sheet; producing a colored interference color formula for the _{Li 0.5 + X Co 0.5- X [} Li 0.5-X C
o _X Ti _1.5 ] O ₄ (0 <X <0.1)
a step of applying an ink or paint obtained by mixing an interfering substance composed of mica powder coated with an i-Co-Ti-based composite oxide and a resin on a base material to form an interfering substance layer; Forming a retroreflective material layer by attaching transparent microspheres, forming an adhesive layer on the back surface of the retroreflective material layer, and laminating and fixing a plurality of the transparent hologram sheets on the retroreflective material layer. It is characterized by consisting of.

In the present invention, it is preferable that the method further comprises a step of fixing a protective layer made of a resin film on the upper surface of the transparent hologram sheet, and a step of fixing a mount on the lower surface of the adhesive layer.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is a seal that can be attached to a product or the like. Since the seal has a hologram, it is very difficult to forge the seal due to the useful properties of the hologram. This is a forgery-preventive pressure-sensitive adhesive seal that makes it possible to determine whether the product to which the seal is attached is a counterfeit or genuine product by a specific means.

Hereinafter, the anti-counterfeit adhesive seal of the present invention will be described in detail using one embodiment of the present invention. FIG. 1 is a sectional view showing a schematic configuration of a forgery prevention adhesive seal according to the present invention. As shown in the figure, the anti-counterfeit adhesive seal 2 of the present invention includes a hologram layer 4 capable of reproducing an image using incident light, and a retroreflective material layer 6 for returning the incident light in the incident light entering direction. , Pressure-sensitive adhesive layer 8 for sticking to articles
Are laminated.

The hologram layer 4 exposes interference fringes of a plurality of hologram images to a rainbow hologram image when a white light is irradiated at a specific angle from a specific direction. This is a multiple exposure type transparent hologram layer which can be reproduced as a laser beam and is capable of reproducing a visible image by interference fringes formed by a Fourier transform pattern of a recorded material when irradiated with a laser beam at a specific angle from a specific direction. The retroreflective material layer 6 is composed of an interference substance layer made of mica powder coated with Li ₂ CoTi ₃ O _{8 that} produces a colored interference color, and transparent microspheres arranged in a line, and includes a hologram layer and an adhesive layer. It is located between.

In the present specification, the 2D image reproducible by the hologram layer does not mean an image on a plane as drawn on a paper surface, but a plane figure projected from the hologram layer plane into space. The 3D image means a stereoscopic image that is projected out of the hologram layer plane and is visible in space. Hereinafter, the hologram layer and the retroreflective layer characteristic of the present invention will be described in detail.

[0021]Hologram layer  FIG. 2 is an explanatory view showing a general method of manufacturing a hologram.
is there. The general method of manufacturing a hologram will be described with reference to FIG.
explain. As shown in FIG. 2A, a certain object 12
Irradiates coherent light 14 and exposes reflected waves from objects
Recording is performed on the recording medium 16. The reflected wave from this object
It is called wave 18. Object wave 1 on photosensitive recording medium 16
When recording 8, a coherent light 14 next to the object
Place a light source 20 that emits light of the same wavelength,
It is sent directly to the photosensitive recording medium 16 without passing through. This light is the reference wave
22. Then, in the photosensitive recording medium 16,
Interferogram by superposition of object wave 18 and reference wave 22
Be recorded. The photosensitive recording medium 16
Response to only object strength,
Complete information on both width and phase is included.

This interference figure is completely different from the original object, and is an irregular figure with fine stripes. The photosensitive recording medium 16 is developed, and as shown in FIG.
When the reproduction light 24 having the same wavelength as the reference wave 22 is irradiated toward the hologram 16 ′ developed on the photosensitive recording medium 16, the light transmitted through the film on which the interference pattern is recorded reproduces the image 26 of the object 12. Observer 2
8 is an image 2 as if the object 12 is there.
6 can be observed.

As a photosensitive recording medium, a photoresist,
When a thermoplastic is used, interference fringes are recorded as irregularities on the surface, and mass production of holograms becomes possible by creating an embossed mold or the like based on the irregularities.

Here, the hologram is actually created using an object, but an interferogram of an image to be brought up by a computer or the like can be created. By recording this interferogram on a transparent material or the like, a hologram similar to that described above can be created.

Since the anti-counterfeit adhesive seal of the present invention is attached to a product, it cannot be irradiated with reproduction light from the back as shown in FIG. 2 (b). Therefore, as shown in FIG. 2 (c), the hologram image 26 can be reproduced by providing the reflection layer 30 on the back surface of the hologram and reflecting the light irradiated from the front surface side from the back surface.

The reflection layer is formed by depositing a light-reflective metal,
Metal oxide is vapor-deposited.
When 0% is deposited, almost all of the light incident on the hologram is reflected. However, when a metal oxide is deposited, the hologram is highly transparent and becomes a translucent or transparent hologram sheet.

In this embodiment, the hologram layer 4 includes a hologram embossed hologram embossed layer,
A transparent hologram sheet is formed by laminating a reflective layer on which metal oxide is deposited.

As described above, in order to reproduce a hologram, light having the same wavelength as that at the time of recording is required. A rainbow hologram is a hologram that enables reproduction of a reproduced image with white light. The transparent hologram layer 4 of the anti-counterfeit adhesive seal of the present invention acts as a rainbow hologram when irradiated with white light as described above, and is a hologram capable of reproducing an image even under white light. As a result, the design of the product is not impaired when the seal is attached to the product, or the design of the product can be improved.

Also, as a property of the hologram, if the angle or direction of the reference light with respect to the object light is changed during recording and recorded, the reproduced image reproduced when the angle or direction of the reproduction light is changed will be reproduced. Some things change.

FIG. 3 is an explanatory diagram for explaining the relationship between the reproduced image of the hologram, the angles of the object light and the reference light. FIG.
It is assumed that the angle between the object light 34 and the reference light 36 is recorded at 20 degrees when a hologram image of the object 32 is recorded as shown in FIG. At this time, it is assumed that the allowable angle of incidence of the reproduction light capable of reproducing the hologram is ± 5 degrees of the incident angle of the reference light. Subsequently, as shown in FIG. 3B, the recording object 32 shown in FIG.
And the angle between the object light 40 and the reference light 42 is recorded at 35 degrees. The wavelengths of the object beams 34 and 40 and the reference beams 36 and 42 are the same in both (a) and (b). The hologram manufactured in this manner is, as shown in FIG.
When the reproduction light 44 is irradiated from the same angle range of ± 5 degrees, the reproduction image 46 of the object 32 recorded in (a) is reproduced, and as shown in (d), the reference light 4 in (b) is reproduced.
When the reproduction light 48 is irradiated from the range of ± 5 degrees of the same angle as 2, the reproduction video 50 of the object 38 recorded in (b) is reproduced.

Further, even if the irradiation angle is the same, (e)
When the irradiation direction of the object light 52 is crushed as shown in FIG. 3A, if the recording object is recorded by changing the irradiation direction of the reference light 54, the irradiation direction of the reproduction light can be changed to obtain a different pattern. Can be played.

In this embodiment, the transparent hologram layer 4
Are used in such a manner as to be subjected to multiple exposure. Therefore, the reproduced image reproduced by changing the reproduction light irradiation angle and the irradiation direction is different. For this reason, a seal having a high design property can be obtained, and it is difficult to copy and create a hologram.

Although there are various types of hologram recording formats, a recording format of a hologram image that can be reproduced under white light in the present embodiment can also use a Fourier transform hologram described later.

Further, a feature of the present invention is that a hologram reproduced image, which cannot be observed under white light, is subjected to multiple exposure on the hologram layer. In the present embodiment, the hologram layer 4 functions as a Fourier transform hologram when irradiated with a laser beam, and the hologram image reproduced under white light disappears, and the hologram layer 4 reproduces a new hologram image by the laser beam. Has been exposed.

FIG. 4 is an explanatory view of a method for producing a Fourier transform hologram. In the method shown in FIG. 4A, the object 56 to be recorded on the hologram is the one recorded on a planar object such as a slide. The object 56 to be recorded on the hologram is placed on the front focal plane of the lens 58 separated by the focal length f, and this is illuminated with parallel laser light 60, and the recording material 62 is placed on the rear focal plane of the lens 58 separated by the focal length f. Place. The reference light 64 also uses parallel light. The hologram thus recorded has a Fourier transform pattern of the object recorded on the recording material surface.

Although FIG. 4A illustrates the case where a lens is used, a Fourier-transform hologram can be created even if no lens is used. In the recording method as shown in FIG. 2, when the recording object 66 is sufficiently far from the surface of the recording material 68 as shown in FIG.
As shown in FIG. 4C, the reference light source 70 and the object light source 72
Are recorded at the same distance D from the recording material 74 and have the same characteristics as the Fourier transform hologram. The former is called a Fraunhofer hologram, and the latter is called a lensless Fourier transform hologram.

The Fourier transform hologram exhibits a unique property by exposing a recorded image to double exposure. In FIG. 4, after recording a certain recording object, it is replaced with another object and recorded again. When a hologram subjected to double exposure is reproduced in this manner, a three-dimensional image is obtained by the amplitude sum of two objects. Also, using a phase plate in one of the two recordings,
When the phase of the reference light is changed by 波長 wavelength, a three-dimensional image is obtained by an amplitude difference between two objects.

The Fourier transform hologram reproduces a three-dimensional image when reproduced on the same wavefront as the reference light. At this time, even if the hologram is moved in the plane, the image does not move. And in this embodiment,
Since the Fourier transform hologram is not formed into a rainbow hologram that can be reproduced by white light, it has a feature that a reproduced image is not reproduced unless a laser beam is irradiated.

[0039]Retroreflective layer  Then further characterize the anti-counterfeit adhesive sticker of the present invention
The retroreflective layer will be described. Forgery prevention in the present invention
The retroreflective layer of the adhesive seal has an L
Interference composed of i-Co-Ti-based composite oxide-coated mica powder
It consists of a material layer and transparent microspheres.

FIG. 5 shows an embodiment of the retroreflective layer of the present invention.
It is a schematic structure sectional view. In this embodiment, the recursive
The emissive layer 78 is made of Li₂CoTi₃O₈Coated mica
82, on which transparent microspheres 84 are arranged and arranged.
It is location. In ordinary retroreflective materials, reflective metal
The base material is composed of a plate, or a reflective metal deposition layer
However, in the present invention, the substrate does not necessarily have reflectivity
It does not need to be a material and may be a cloth or a film.
This is because Li used in the interference layer₂CoTi ₃O₈Suffered
Mica mica powder also has a high refractive index and sufficient light reflectivity
It is because it has.

The transparent microsphere 84 plays a role of returning the returned light in the direction of the incident light when the incoming light returns. The interference substance layer that causes colored interference colors should be configured so that the conventional retroreflective material is a metal plate, a silver reflective layer made of a metal deposited layer, or a paint that reflects only light of a specific wavelength. However, the retroreflective material of the present invention imparts a color tone to the return light by utilizing the interference effect of light. For this reason,
Light utilization efficiency is extremely high.

In this embodiment, Li is used for the interference substance layer.
₂CoTi₃O₈Before using coated mica 82
As described above. The light that has passed through the transparent microsphere 84 is Li
₂CoTi₃O₈Surface of coating layer 86 of coated mica 82 and cloud
Light reflected by the surface of the base 88 and caused by the thickness of the coating layer 86
Interference occurs due to road differences. For this reason Li₂CoTi ₃
O₈Arbitrary color tone by adjusting the layer thickness of
Can be. In addition, substances that cause interference colors are chemical, light
Li is a chemically stable inorganic substance₂CoTi₃O₈Coating
Retroreflective layer with excellent heat resistance and aging resistance due to mica
It can be. The anti-counterfeit adhesive seal of the present invention
The use of a retroreflective material such as
Light can be given and the retroreflection
The optical path difference in the interfering substance changes depending on the
To prevent the color of the quality from changing
is there.

Further, by using such a retroreflective material, the security can be further improved. In the retroreflective layer of the present invention, the interference substance in the retroreflective material does not produce an interference color under general illumination such as a fluorescent lamp or under light irradiated from a normal light source such as under sunlight. This is because the directionality of incident light is not constant, and light incident from various directions cancels out interference colors generated by light incident from each direction. Therefore, under normal light, the retroreflective layer of the present invention exhibits the color tone of the appearance color of the interference substance layer.

However, if the direction of the incident light is aligned in a certain direction and the irradiation is performed, the interference substance layer of the present invention will exhibit a color generated by the interference of the incident light. The light whose directionality is aligned in a certain direction is referred to herein as linear light. Although the linear light has the same directionality, the linear light is different from the laser beam because there are various wavelengths.

Therefore, by making the appearance color of the interference substance used in the interference substance layer different from that of the interference which can be adjusted by the thickness of the coating layer of the interference substance, the color tone of the retroreflective layer changes depending on the irradiated light. They come in different tones.

As described above, since the retroreflective layer used in the present invention exhibits different colors under normal light and under linear light, the color tones exhibited by irradiating the linear light are examined to determine whether the product is a counterfeit or genuine product. The determination can be made to some extent. And since the seal of the present invention is generally observed only under normal light, it is not known to anyone other than those concerned that irradiating such a light beam will change the color tone. It is useful as hidden information and difficult to forge.

As described above, each part of the seal of the present invention has been described in detail using one embodiment of the anti-counterfeit adhesive seal of the present invention. Anti-counterfeit adhesive seal in the present invention, the product used, depending on its use, adhesiveness, heat resistance,
By selecting the appropriate material in consideration of weather resistance, chemical resistance, etc. and forming each layer, general printing such as fine paper, art paper, mirror coated paper, Japanese paper, rough paper, E-stage, UV printing, UV
Varnish, UV coated paper, press coat, PVC, PP, P
Various kinds of paper such as laminated paper by ET etc., vinyl such as soft, hard, foamed vinyl, ABS, AS, Hi
It can be used for various materials such as plastics such as PS, AC, PP, and PET, various fibers such as bookbinding, albums, T-shirts, and cloth products, leather, glass, metal, and woodwork. The materials to which the present invention can be applied are not limited to those listed here.

Subsequently, according to the present invention, the production of the anti-counterfeit adhesive seal
An example will be described.Production Example 1  Rainbow holograph that can reproduce the playback video with white light
Reproduced only by interference fringes and red laser light
Interference fringes as Fourier transform holograms capable of reproducing images
The recording material in which multiplex is recorded is called a master hologram.
To record the same interference fringes as the master hologram.
The same playback image as the master hologram
A viable hologram film was created. This film
Titanium dioxide is deposited on the
Done.

This transparent hologram sheet is capable of reproducing a reproduced image mainly by green light from white light under white light, and observes four kinds of different reproduced images when the irradiation direction of the reproduction light is changed. This is a hologram that can observe one type of a specific reproduced image only when the red laser is irradiated.

Subsequently, a transparent colored screen printing ink in which a cloth made of white acrylic fiber was used as a base material, and mica coated with Li ₂ CoTi ₃ O ₈ was mixed with an acrylic resin solution, was screen-printed thereon, and refraction was performed thereon. 20 at 1.9
Transparent glass fine particles of 0 to 250 mesh were scattered and adhered and dried in a single layer so that more than one hemisphere was not buried, thereby producing a retroreflective layer. This retroreflective layer exhibited an external color of green to blue under normal light, and exhibited an interference color of red to purple under linear light.

The transparent hologram sheet and the retroreflective layer separately manufactured as described above are laminated to manufacture a forgery-preventive pressure-sensitive adhesive seal. FIG. 6 is a sectional view of the completed anti-counterfeit adhesive seal. The manufacturing process will be described with reference to FIG.

First, an adhesive layer 92 was provided on a backing paper 90, and the substrate side of the retroreflective material 94 was fixed to the adhesive layer 92 thereon. A silicone resin solution was applied to the entire surface of the fixed transparent microspheres of the fixed retroreflective material 94, and when dried to such an extent that the resin did not flow, a transparent hologram 96 was laminated and fixed. Further, for the purpose of protecting the hologram sheet, a polyethylene terephthalate film was fixed as a protective layer 98 on the transparent hologram 96 to obtain a forgery prevention adhesive seal 100 of the present invention.

When the obtained seal was affixed to the product and observed, when a light beam was incident without white light and a hologram image was not reproduced, the color of green to blue exhibited by the interference substance in the retroreflective layer was observed. Was observed. As the product was tilted to change the incident direction and incident angle of white light, a reproduced image reproduced by green light was observed together with the rainbow-colored reflected light unique to the rainbow hologram. Further, when white light was incident from various angles and directions, different reproduced images could be observed on the transparent hologram. FIG. 7 shows a reproduced image reproduced by white light.

The arrows shown in FIGS. 7A, 7B, 7C, and 7D indicate the direction of irradiation of incident light. When white light was incident from different directions, four different reproduced images were observed on the forgery prevention seal. (A) to (c) are reproduced as 2D images because they are character information. However, since holograms can be reproduced as stereoscopic images, characters are reproduced so that characters jump out of the seal surface and float in space. . Further, (d) is reproduced as a real object video of a 3D image because it is graphic information.

In the anti-counterfeit pressure-sensitive adhesive seal manufactured in the present manufacturing example, the wavelength of light capable of reproducing a reproduced image of the transparent hologram is substantially the same as the wavelength of light having a color tone represented by the appearance color of the retroreflective layer. A very clear reproduced image could be obtained.

However, even if white light is incident from any angle and direction, a reproduced image that can be reproduced only by laser light cannot be reproduced, and there is a hologram image that can be reproduced by laser light in a transparent hologram. Without knowing what to do, there was no way to confirm its existence. Further, since this white light was not linear light, the color tone of the retroreflective layer also exhibited the appearance color of the interference substance, and did not exhibit the interference color.

However, when irradiated with a red laser beam,
The reproduced image reproduced by the white light has disappeared. This is because the transparent hologram sheet selects a specific wavelength light from the white light to reproduce the reproduced image, but the laser light has a very narrow wavelength width in the irradiated light, and the transparent hologram sheet This is because it does not include the wavelength necessary to reproduce the reproduced image. When the irradiation direction and the irradiation angle of the laser were further changed, the transparent hologram acted as a Fourier transform hologram, and a new reproduced image that could not be observed under white light was clearly observed.

FIG. 8 is a schematic view of reproducing a transparent hologram sheet with a laser beam. As shown in FIG. 8A, the cylindrical object 104 is put on the seal 100, and the cylindrical object 104
The red laser light source 106 is set at a red laser light entrance provided in a part of the laser light source. On the upper end side of the cylindrical object 104, a ground glass 108 serving as a screen is provided.
When the red laser light source 106 irradiates the red laser to the seal 100, the reproduced image by the transparent hologram sheet floats on the ground glass 108 as shown in FIG. 8B.

When the irradiation of the red laser was stopped, the reproduced image reproduced by the laser beam disappeared, and it was not known that such a hologram image existed. Further, when the seal 100 was irradiated with linear light, the color tone of the seal changed from a green-blue color tone to a red-purple color tone.

In the present embodiment and the production example, a hologram interference fringe reproducible under white light and a hologram interference fringe reproduced under laser light are recorded on one transparent hologram. However, the present invention is not limited to this, and a hologram that can be reproduced under white light and a hologram that is reproduced under laser light may be separately provided, and these may be stacked. Further, four hologram sheets for reproducing each of the reproduced images (a) to (d) as shown in FIG. 7 are laminated, and a hologram sheet reproduced under a laser beam is further laminated thereon. Is also good. However, when a plurality of holograms are stacked and used, care must be taken so that the hologram image is not reproduced during the sealing.

When a plurality of holograms are stacked as described above, each hologram may have its own reflective layer, or only the lowermost hologram may have a reflective layer acting as a reflective layer on all holograms. It may be provided. However, when each hologram has its own reflection layer, it is necessary that the hologram is a transparent hologram using a metal oxide for the reflection layer.

[0062]Production Example 2  7A, 7B, 7C, and 7D.
A ray that can reproduce one of the hologram images with white light
Four recordings of interference fringes recorded as symbol holograms
Playback video can be played only by recording material and red laser beam
Interference fringes are recorded as efficient Fourier transform holograms
Using the recorded material as a master hologram,
By recording interference patterns similar to holograms,
A hologram that can reproduce the same reproduced image as a tar hologram
Five films were made in total. Play the video on this film
Possible reproduction light irradiation direction and irradiation angle do not overlap
Laminate the film, and apply the carbon dioxide to the film laminated on the bottom layer.
A transparent hologram sheet was prepared by evaporating tin.

This transparent hologram sheet can reproduce a reproduced image mainly by green light from the white light under white light, and when the irradiation direction of the reproduction light is changed, four different reproduced images can be observed. This is a hologram that can observe one type of a specific reproduced image only when the red laser is irradiated.

Subsequently, a transparent colored screen printing ink in which a cloth made of white acrylic fiber was used as a base material, and mica coated with Li ₂ CoTi ₃ O ₈ was mixed with an acrylic resin solution, was screen-printed thereon, and refraction was performed thereon. 20 at 1.9
Transparent glass fine particles of 0 to 250 mesh were scattered and adhered and dried in a single layer so that more than one hemisphere was not buried, thereby producing a retroreflective layer. This retroreflective layer exhibited an external color of green to blue under normal light, and exhibited an interference color of red to purple under linear light.

Subsequently, a pressure-sensitive adhesive layer was provided on the backing paper, on which the base material side of the retroreflective material was fixed. Then, a silicone resin solution was applied to the entire surface of the fixed transparent microspheres of the retroreflective material, and when dried to such an extent that the resin did not flow, a transparent hologram was laminated and fixed. Furthermore, a polyethylene terephthalate film is fixed on the transparent hologram as a protective layer for the purpose of protecting the hologram sheet,
An anti-counterfeit pressure-sensitive adhesive seal of the present invention was obtained. The present invention is not limited only to Production Examples 1 and 2 shown here.

[0066]

As described above, the anti-counterfeit pressure-sensitive adhesive seal according to the present invention has a design that does not degrade the design of the product to be affixed under white light,
By irradiating the laser light from a specific direction and an angle, a reproduced image reproduced can immediately distinguish an authentic product from a counterfeit product. In addition, a hologram image that can reproduce a reproduced image only with laser light is difficult to forge the seal of the present invention because the wavelength of reproducible light, and the irradiation direction and angle cannot be known by anyone other than those involved. . Further, since a sticker on which a large number of hologram images are recorded is used, the sticker is more decorative than a conventional sticker using a hologram, and is more difficult to forge. Further, the hologram image can be easily replaced by changing the recorded matter, so that the hologram image can be freely selected. Also, by recording a plurality of hologram images, it is possible to obtain a seal containing a large number of hologram images having different depths, so that forgery can be made more difficult and decorativeness can be improved. Can be. Further, since the base material of the retroreflective material can be freely selected, the texture of the product to be affixed is not impaired. In addition, the protective layer on the top and bottom of the seal and the backing
Storage and carrying of the seal are facilitated. Further, according to the method for producing a forgery-preventive pressure-sensitive adhesive seal of the present invention, it is possible to produce a seal rich in decorativeness and difficult to forge, and to easily produce a seal containing many hologram images having different depths. Becomes possible.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a schematic configuration of a forgery prevention adhesive seal according to the present invention.

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

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

FIG. 4 is an explanatory diagram of a method for manufacturing a Fourier transform hologram.

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

FIG. 6 is a cross-sectional view of a forgery-preventing pressure-sensitive adhesive seal completed in a manufacturing example.

FIG. 7 is a reproduced image reproduced by white light.

FIG. 8 is a reproduced image reproduced by a laser beam.

[Explanation of symbols]

 2 Anti-counterfeit adhesive seal 4 Hologram layer 6 Retroreflective material layer 8 Adhesive layer

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoshio Katsuki 6-11-12 Honcho, Tanashi-shi, Tokyo F-term (reference) at Citizen Watch Co., Ltd. Tanashi Works 2H042 EA07 EA14 EA15 2H048 GA61 2K008 AA13 BB04 BB06 CC01 DD12 EE07 FF02 FF07 FF21 GG01 HH02 HH03

Claims (11)

[Claims] 1. A hologram layer capable of reproducing an image using incident light, a retroreflective material layer for returning incident light in the incident light entering direction, and an adhesive layer for sticking to an article. In the seal, the hologram layer can reproduce a 2D image and a 3D image rainbow hologram image by irradiating white light at a specific angle from a specific direction, and irradiating a laser beam at a specific angle from a specific direction, The rainbow hologram image is a multi-exposure type hologram layer from which a new Fourier transform hologram image can be reproduced, and the retroreflective material layer has a general formula of Li ₀ which generates a colored interference color on a substrate. _{0.5+ X} Co _0.5-X [Li
_{0.5-X Co X Ti 1.5]} O 4 (0 <X <0.1)
An anti-counterfeit adhesive seal comprising an interference substance layer made of mica powder coated with a Li-Co-Ti-based composite oxide represented by the formula: and transparent microspheres arranged on the interference substance layer. 2. A hologram layer capable of reproducing an image using incident light, a retroreflective material layer for returning incident light in a direction of entering incident light, and an adhesive layer for sticking to an article are laminated. When the hologram layer is irradiated with white light at a specific angle from a specific direction, a rainbow hologram capable of reproducing a 2D image and a 3D rainbow hologram image, and a laser beam is irradiated at a specific angle from a specific direction. A Fourier transform hologram capable of reproducing a Fourier transform hologram image is laminated, and the retroreflective material layer has a general formula of 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-counterfeit adhesive seal comprising an interference substance layer made of mica powder coated with a Li-Co-Ti-based composite oxide represented by the formula: and transparent microspheres arranged on the interference substance layer. 3. The anti-counterfeit adhesive seal according to claim 1, wherein the hologram layer has interference fringes recorded by multiple exposures of a plurality of hologram images recorded thereon. 4. The hologram layer includes a transparent hologram sheet capable of reproducing a hologram layer with white light and a transparent hologram sheet capable of reproducing a hologram image with a laser beam, and is formed by laminating at least the two hologram sheets. 3. An anti-counterfeit adhesive seal according to claim 2, wherein 5. The anti-counterfeit adhesive seal according to claim 4, wherein the hologram sheet capable of reproducing a hologram image with white light is formed by laminating two or more transparent hologram sheets having different hologram images. 6. The transparent hologram sheet has at least one reflection layer.
Anti-counterfeit adhesive seal as described. 7. The substrate of the retroreflective material layer is made of metal, cloth,
3. The forgery-preventive pressure-sensitive adhesive seal according to claim 1, comprising one of paper and a resin film. 8. The anti-counterfeit adhesive seal includes a protective layer made of a resin film for protecting the surface of the hologram layer, and a backing for protecting the surface of the adhesive layer. Claim 1 and Claim 2
Anti-counterfeit adhesive seal as described. 9. A hologram layer capable of reproducing an image using incident light, a retroreflective material layer for returning incident light in a direction of entering incident light, and a pressure-sensitive adhesive layer for sticking to an article. A method of manufacturing a sealed
A step of creating a master hologram in which an interference fringe as a rainbow hologram capable of reproducing a rainbow hologram image of a D image and a 3D image and an interference fringe as a Fourier transform hologram capable of reproducing an image with a red laser beam are multiplexed; A step of forming a hologram film by resin formation from the master hologram; a step of forming a transparent hologram sheet by forming a metal oxide on one surface of the hologram film; a general formula for producing a colored interference color is Li _{0.5 + X} Co
_0.5-X [Li _{0.5 -X} Co _X Ti _1.5 ] O
₄ An ink or paint mixed with an interfering substance consisting of a mica powder coated with a Li-Co-Ti-based composite oxide represented by (0 <X <0.1) and a resin is applied on a base material to cause interference. Forming a material layer; attaching a transparent microsphere made of glass to the interference material layer to form a retroreflective material layer; forming an adhesive material layer on the back surface of the retroreflective material layer; A step of laminating and fixing the transparent hologram sheet on a layer. 10. A hologram layer capable of reproducing an image using incident light, a retroreflective material layer for returning incident light in an incident light entering direction, and an adhesive layer for sticking to an article are laminated. In the method of manufacturing a seal, a master hologram recording interference fringes as a rainbow hologram capable of reproducing a rainbow hologram image of a 2D image and a 3D image with white light, and a Fourier transform hologram capable of reproducing an image with a red laser beam Forming a master hologram on which interference fringes are recorded; forming respective hologram films by resin formation from the master hologram; forming a metal oxide on at least one surface of the hologram film to form a transparent hologram sheet the step of creating a general formula Li 0 to rise to interference colors _{colored. +} X Co
_0.5-X [Li _{0.5 -X} Co _X Ti _1.5 ] O
₄ An ink or paint mixed with an interfering substance consisting of a mica powder coated with a Li-Co-Ti-based composite oxide represented by (0 <X <0.1) and a resin is applied on a base material to cause interference. Forming a material layer; attaching a transparent microsphere made of glass to the interference material layer to form a retroreflective material layer; forming an adhesive material layer on the back surface of the retroreflective material layer; And fixing a plurality of the transparent hologram sheets on a layer. 11. The method according to claim 9, further comprising: fixing a protective layer made of a resin film on the upper surface of the transparent hologram sheet; and fixing a mount on the lower surface of the adhesive layer. 11. The method for producing a forgery prevention adhesive seal according to item 10.