JP3570593B2 - Hologram sticker - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hologram-adhered body having a hologram attached to a base material, which is preferably applied to an identification card, a credit card, and the like.
[0002]
Problems to be solved by the prior art and the invention
Information carrier such as ID card or credit card records various information including name, and it is important that it is not forged because it is important. For this purpose, a hologram is attached as one means. However, there has been a possibility that the hologram may be forged by peeling off the hologram, copying it, or replacing it with another one.
[0003]
An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide an information carrier to which a hologram capable of improving the capability of preventing forgery is attached.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the hologram sticker of the present invention is a hologram sticker in which a volume type hologram having a transparent protective sheet formed on the surface is attached to a base material, and the transparent protective sheet and the volume adhesive layer for adhering the type of hologram, the two adhesive layers of the adhesive layer for adhering the hologram and the substrate volume type, using a different adhesive strength adhesive, different their adhesion different adhesive from each other It is characterized in that a distribution is provided in the adhesive force so as to be formed in a portion.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments will be described with reference to the drawings.
FIG. 1A is a cross-sectional view showing a first embodiment of a hologram sticking body according to the present invention, in which 1 is a base material, 2 is an adhesive layer, 3 is a hologram, 4 is an adhesive layer, and 5 is an adhesive layer. 3 shows a transparent protective sheet.
[0006]
The base material 1 is a main body of the attached body, and is formed of paper having appropriate thickness, plastic, or the like. Although not shown, the substrate 1 records predetermined individual information about the holder of the patch, such as name, age, gender, and identification number. Further, a photograph of the face of the holder of the patch may be attached to the substrate 1. These pieces of individual information may be recorded at a place where the hologram 3 is pasted, or may be recorded at a place other than the place where the hologram 3 is pasted. In short, the individual information can be recorded at an appropriate place on the base material 1 as needed.
[0007]
The recording of these individual information can be performed by a known means such as handwriting, a type, and a printer using a means using a toner, a transfer ribbon of a hot-melt type, a ribbon for a type, a printing ink, or the like. it can. Further, recording can be performed by magnetic recording. Further, when the substrate 1 is formed of plastic or metal, recording can be performed by embossing. This information carrier may be an identification card or a credit card, and may generally have predetermined individual information recorded thereon.
[0008]
A hologram 3 is attached to a predetermined portion of the substrate 1 with an adhesive layer 2, and a transparent protective sheet 5 is attached to the surface of the hologram 3 with an adhesive layer 4. Here, examples of the transparent protective sheet 5 include a polyethylene film (PE), a polypropylene film (PP), an ethylene-vinyl alcohol copolymer film (EVOH), a polyvinyl alcohol film (PVA), a polymethyl methacrylate film (PMMP), An ether sulfone film (PES), a polyamide film (nylon film), a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer film (PFA), or the like can be used.
[0009]
Since it is not desirable for the hologram 3 to have irregularities on its surface, it is preferable to use a reflection type volume hologram (Lipman hologram) or a transmission type volume hologram.
[0010]
Here, the Lippmann hologram will be described as follows. The Lippmann hologram is recorded in an arrangement as shown in FIG. 2A and is reproduced according to a principle as shown in FIG. 2B. For recording of Lippmann holograms, a coherent object beam 11 having information on a recording object O is incident from one side of a thick hologram photosensitive material 10 such as a photopolymer or a silver halide emulsion, and at the same time, coherent reference of the same wavelength is performed. When the light 12 is incident at a predetermined angle from the opposite side, the object light 11 and the reference light 12 interfere with each other in the hologram photosensitive material 10, and a Lippmann hologram (volume hologram interference fringe) is recorded. In reproducing the hologram, when the hologram recording medium 20 (hologram sensitive material 10) on which the Lippmann hologram is recorded is irradiated with the reproduction illumination light 22 from the same direction as the reference light 12 at the time of recording, the incident light is recorded. Diffracted by the volume hologram interference fringes, the diffracted light 23 is diffracted in the same direction as the light emitted from the position of the recording object O, and reproduces the reproduced image O ′ at the original position of the recording object O. Alternatively, when the reproduction illumination light 22 traveling in the opposite direction to the reference light 12 at the time of recording is applied to the back surface, the reproduced image is reproduced at the original position of the recording object O. In any case, the Lippmann hologram 2 is for reproducing a recorded reproduced image of a picture of a three-dimensional object or a planar object in a predetermined space.
[0011]
The characteristics of such Lippmann holograms are that they can be reproduced by environmental light such as indoor illumination light, that they have wavelength selectivity, that they have angle selectivity, that they can record and reproduce three-dimensional objects, that they can be multiplex-recorded, etc. is there.
[0012]
Therefore, when a Lippmann hologram is used as the hologram 3 in FIG. 1A, the pattern recorded on the Lippmann hologram is observed as a specific colored pattern floating in the air by the illumination light.
[0013]
A transmission type and volume type hologram will be described below. The transmission-type and volume-type holograms are recorded in an arrangement as shown in FIG. 3A and reproduced according to a principle as shown in FIG. 3B. To record an image, a coherent object beam 31 having information on a recording object O is incident from one side of a thick hologram photosensitive material 30, and simultaneously a coherent reference beam 32 having the same wavelength is incident at a predetermined angle from the same side. Do it by doing. As a result, the object light 31 and the reference light 32 interfere with each other in the hologram photosensitive material 30, and a volume hologram interference fringe is recorded.
[0014]
When reproducing the hologram, the hologram recording body 40 (hologram sensitive material 30) on which the image is recorded is irradiated with the reproduction illumination light 32 from the same direction as the reference light 32 at the time of recording. As a result, the incident light is diffracted by the recorded volume hologram interference fringes, and the diffracted light 33 is diffracted in the same direction as the light emitted from the position of the recording object O, and is reproduced at the original position of the recording object O. The image O 'is reproduced. Alternatively, when the reproduction illumination light 32 that advances in the opposite direction to the reference light 32 at the time of recording is applied to the back surface, the reproduced image is reproduced at the original position of the recording object O.
[0015]
Further, as the hologram 3, it is also possible to use a hologram 3 which is substantially reflective by depositing a reflective layer on the back of a transmission type hologram.
[0016]
Now, the adhesive layers 2 and 4 are not formed by uniformly applying one kind of adhesive, but have a distribution in the in-plane adhesive force. That is, the adhesive layers 2 and 4 are provided with a portion having a strong adhesive force and a portion having a weak adhesive force.
[0017]
FIG. 1B shows this state. FIG. 1B is a view of the adhesive layer 4 of FIG. 1A as viewed from the direction indicated by A. For example, a hatched portion S is formed of an adhesive having a strong adhesive force, and is hatched. The portion W which is not formed is formed of an adhesive having a low adhesive strength. That is, in this example, the distribution of the adhesive force in the plane of the adhesive layer 4 is formed in a stripe shape. However, since the adhesive itself is transparent or of the same color, it is not obvious by visual inspection that the adhesive force distribution is formed in a stripe shape as shown in FIG. 1 (b).
[0018]
The same applies to the adhesive layer 2. However, as shown in FIG. 1A, the portion of the adhesive layer 4 opposed to the strong adhesive portion is formed of an adhesive having a low adhesive force, and the adhesive force of the adhesive layer 4 is formed. It is preferable to form the portion facing the weak portion with an adhesive having a strong adhesive force.
[0019]
By the way, examples of the adhesive include natural rubber, recycled rubber, chloroprene rubber, nitrile rubber, styrene / butadiene rubber, thermoplastic elastomer, and other elastomer adhesives, and epoxy resin, polyurethane, and the like. Synthetic resin adhesives, reactive acrylic adhesives, chemically reactive adhesives such as cyanoacrylate adhesives, UV-curable adhesives, EB-curable adhesives, and ethylene-vinyl acetate copolymer resin-based hot melt adhesives Hot-melt adhesives such as polyamide, polyester, thermoplastic elastomer, and reactive hot-melt, water-soluble adhesives such as water-based adhesives, emulsion-based adhesives, latex-based adhesives, and inorganic-based adhesives Various types of adhesives are known, but to make a difference in the adhesive strength of the adhesive, the composition of the adhesive and its composition ratio must be changed. It may be Re.
[0020]
Specifically, for example, by pattern-coating an acrylic adhesive and a silicone adhesive, the distribution of the in-plane adhesive force of the adhesive layers 2 and 4 can be given. Further, the adhesive strength can be differentiated by adjusting the amount of tackifier resin known to improve the adhesiveness.
[0021]
According to the above configuration, for example, when the hologram 3 is to be peeled from the direction indicated by B in FIG. 1A, the hologram 3 is pulled toward the one having the stronger adhesive force, and the hologram 3 is broken as shown in FIG. Will be done. In FIG. 4, it is assumed that the hatched portion S of the adhesive layers 2 and 4 and the non-hatched portion W have the former adhesive strength.
[0022]
When the hologram 3 is peeled in this way, the hologram 3 is destroyed or deformed even if it is not destroyed. Therefore, when the hologram 3 is copied or replaced with another one, it is easily forged. Can be determined.
[0023]
As described above, according to the hologram stuck body, the capability of preventing forgery can be greatly improved as compared with the related art.
[0024]
While the first embodiment has been described above, another embodiment will now be described. In the following, the same components as those shown in FIG. 1 are denoted by the same reference numerals, and redundant description will be omitted.
[0025]
FIG. 5 is a cross-sectional view showing the second embodiment. In FIG. 5, the adhesive layer 6 has one type of adhesive applied uniformly. Others are the same as those shown in FIG.
[0026]
FIG. 6 is a cross-sectional view showing the third embodiment. In FIG. 6, one type of adhesive is uniformly applied to the adhesive layer 7. Others are the same as those shown in FIG.
[0027]
That is, since there are two adhesive layers, the adhesive force may be distributed in the plane of both adhesive layers, or the adhesive force may be distributed in the plane of either one of the adhesive layers. Good thing.
[0032]
The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and various modifications are possible. For example, the pattern of the distribution of the adhesive force in the plane of the adhesive layer is not limited to the pattern shown in the above-described embodiment, but can be arbitrarily determined.
[Brief description of the drawings]
FIG. 1 is a view showing a first embodiment of a hologram sticking body according to the present invention.
FIG. 2 is a diagram for explaining a recording / reproducing method of a Lippmann hologram.
FIG. 3 is a diagram illustrating a recording / reproducing method of a transmission type and volume type hologram.
FIG. 4 is a view for explaining a state when the hologram 3 is peeled off from a direction indicated by B in the configuration shown in FIG.
FIG. 5 is a view showing a second embodiment of the hologram sticking body according to the present invention.
FIG. 6 is a view showing a third embodiment of the hologram sticking body according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Base material 2, 4, 6, 7, 8, 9 ... Adhesive layer 3 ... Hologram 5 ... Transparent protective sheet

Claims (1)

A hologram bonded body in which a volume type hologram having a transparent protective sheet formed on a surface thereof is adhered to a substrate, an adhesive layer for bonding the transparent protective sheet and the volume type hologram, a volume type hologram and the substrate The two adhesive layers of the adhesive layer that adhere to each other are formed by using adhesives having different adhesive strengths, and forming adhesives having different adhesive strengths on different portions from each other, so that the adhesive strengths are distributed. A hologram affixed body, characterized in that:

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