JP2002215010A - Authenticity discrimination body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that a forged hologram which imitates only the appearance comes to market because an image forming body of the prior art needs a separate check means or that a check pattern which makes the hidden pattern of the hologram of the authentic article visible also on the forged hologram becomes rampant. SOLUTION: An authenticity discrimination body 1 has a configuration in which a pattern layer 3, an adhesive layer 4 and a hologram layer 5 are stacked sequentially on a substrate 2, and has a hidden pattern in one of the pattern layer 3 and the hologram layer 5 and has the check pattern on the other layer. Alternatively, the authenticity discrimination body 1 has a configuration in which a first pattern layer 3a, an adhesive layer 4, a hologram layer 5 and a second pattern layer 3b are stacked sequentially on a substrate 2, and has a hidden pattern in one of the first and second pattern layers and has the check pattern on the other layer. The hidden pattern and the check pattern consist of dots or fine parallel lines.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an authenticity discriminator applied to an information recording medium or the like and capable of confirming authenticity without using a separate confirmation pattern. INDUSTRIAL APPLICATION This invention is suitable for applying to an information recording body, especially a card.

[0002]

2. Description of the Related Art An information recording medium on which information is recorded includes:
(1) A card that generates a monetary value when used, such as cards such as a savings card or a credit card; (2) A cash voucher having a face value such as a banknote, a security, or a gift certificate; (3) Items that have a value determined speculatively or by other factors, such as stock certificates, lottery tickets, or betting tickets, and (4) monetary values, such as passports or ID cards, do not directly generate monetary value, There are things that guarantee the qualifications and behavior of the possessor.

[0003] Information recording media as described above have economical or other value, directly or indirectly, and are forged to manufacture them with improper intention, or discarded when they are genuine or used. There is no end to alterations that make use of what should be done.

As a countermeasure against forgery and falsification, in banknotes and the like, elaborate printing is performed by using a special paper with a watermark and by a printing method using an ink which is specially mixed with an engraved intaglio. Have been. Also, stock certificates, securities,
Alternatively, a gift certificate is also printed using a general-purpose printing method, but according to a bill. In addition, for cards such as savings and savings cards or credit cards, invisible electronic information is recorded in the magnetic stripe, making it difficult to forge only with visual elements. A hologram seal or the like, which is difficult to apply, is attached to prevent forgery.

[0005] Among them, the hologram seal is often used for the purpose of guaranteeing the authenticity of the object to be stuck, since the production of the hologram involves difficulty. However, the principle of the hologram seal itself is well known, and although the manufacturing technology is advanced, it can be counterfeited by mastering the technology. Efforts are being made to enhance functionality.

For example, JP-A-11-277962 discloses an image forming body in which a hologram forming layer and a hidden pattern in which a hidden pattern is formed by halftone dots or lines are described. As a means, a hidden pattern can be visualized by superimposing a confirmation pattern formed of a halftone dot or a line separate from the image forming body.

According to the invention described in the above publication,
Since the authenticity can be determined by attaching the image forming body to a card or the like and using the confirmation pattern, it is easy to detect a forgery such as attaching a forged hologram merely having a similar appearance to the card. However, compared to cards, the confirmation pattern tends to be considered less important, so the confirmation pattern is stolen when left unattended, and the hidden pattern of the genuine hologram appears on the forged hologram. There is a risk that fraudulent use of creating and using a simple confirmation pattern may occur.

[0008]

Therefore, in the present invention, since the image forming body in the above-mentioned prior art requires a separate confirmation means, a hologram or a genuine product which is forged by merely imitating only the external appearance. It is an object of the present invention to prevent a confirmation pattern produced so that the hidden pattern of the hologram can be viewed on a forged hologram.

[0009]

In the above prior art, the confirmation pattern, which is separate from the image forming body, is replaced on the card by
The problem could be solved by laminating the hologram with a hologram having a hidden pattern. The problem could also be solved by providing the hologram with a confirmation pattern and another layer with a hidden pattern. Further, the problem could be solved by sandwiching the hologram between the two pattern layers, and providing one of the two pattern layers with a hidden pattern and the other with a confirmation pattern.

According to a first aspect of the present invention, a pattern layer and a hologram layer are laminated on a base material of an information recording medium, and one of the pattern layer and the hologram layer is constituted by halftone dots or lines. The present invention relates to an authenticity discriminator characterized in that the authenticity discriminator has a hidden pattern and the other has a confirmation pattern composed of halftone dots or lines. According to a second invention, a first pattern layer, a hologram layer, and a second pattern layer are sequentially laminated on a base material of an information recording medium, and the first pattern layer and the second pattern layer Either one is
An authenticity identification body having a hidden pattern constituted by a halftone dot or a line, and the other having a confirmation pattern constituted by a halftone dot or a line. A third invention relates to the authenticity identification body according to the first or second invention, wherein the hologram layer is laminated on the pattern layer via an adhesive layer. According to a fourth aspect of the present invention, in any one of the first to third aspects, the hologram layer is a reflection layer having transparency from a lower layer side and a hologram formation layer on which a hologram is formed. 1 to 3. A fifth invention relates to the authenticity identification body according to any one of the first to fourth inventions, wherein the information recording body is a card.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. As shown in FIG. 1A, an authenticity identification body 1 of the present invention includes, for example, a pattern layer 3 laminated on a part of a substrate 2, and a hologram on the pattern layer 3 via an adhesive layer 4. The layers 5 are laminated. In this structure, one of the pattern layer 3 and the hologram layer 5 has a hidden pattern, and the other has a confirmation pattern. Further, the pattern layer 3 and the hologram layer 5 may be replaced with each other.

As shown in FIG. 1B, the authenticity discriminator 1 of the present invention has a pattern layer 3a laminated on a part of a substrate 2 and an adhesive layer 4 on the pattern layer 3. The hologram layer 5 may be laminated, and a pattern layer 3b different from the previous one may be further laminated on the hologram layer 5. For distinction, the pattern layer 3a on the base material 2 is referred to as a first pattern layer, and the uppermost pattern layer 3b is referred to as a second pattern layer. In this structure, one of the first pattern layer 3a and the second pattern layer 3b has a hidden pattern, and the other has a confirmation pattern.

The hologram layer 5 in the above two examples
Although described later, it may be composed of one layer having a hologram, but as shown in FIG. 2, it has a structure in which a reflection layer 5b is laminated below a hologram forming layer 5a having fine irregularities of the hologram. You may.

The present invention is characterized in that a hidden pattern and a confirmation pattern are superimposed on one authenticity discriminator, and the hidden pattern and the confirmation pattern are all line patterns or halftone dots. It is composed of regular pattern elements.

FIG. 3A is a view showing an example of the hidden pattern 11. The hidden pattern 11 is a horizontally long rectangular pattern portion 11a at the center, and a frame-shaped pattern portion in contact with the four circumferences of the pattern portion 11a. 11b and three portions of the background portion 11c, and each of the three portions is constituted by a line. Of these three parts,
The pattern portion 11a and the pattern portion 11b are composed of the same upwardly-sloped lines, however, in both pattern portions, the lines are shifted by ピ ッ チ pitch.
The remaining background 11c is composed of a line descending to the right. It is assumed that two types of parallel lines having different directions (angles) used here are orthogonal to each other. The line is
It refers to an aggregate in which lines having a constant width w are arranged at equal intervals at a pitch of 2w.

FIG. 3B illustrates a confirmation pattern 12 for confirming the hidden pattern 11 shown in FIG. 3A.
Are the same in pitch and direction (angle) as the lines forming the pattern portions 11a and 11b surrounding the central portion of the hidden pattern 11 and the periphery thereof described with reference to FIG. Although the pitch is the same as that of the lines forming the background portion 11c, the directions are orthogonal to each other.

FIG. 4 shows a state in which the hidden pattern 11 and the confirmation pattern 12 in the above example are overlapped. The confirmation pattern 1 shown in FIG. 3B is placed on the hidden pattern 11 shown in FIG.
2, when the lines forming the confirmation pattern 12 exactly overlap with the lines forming the pattern portion 11 a at the center of the hidden pattern 11, as shown in FIG.
Although the central pattern portion 11a looks similar to the original line state, the non-line portion of the surrounding frame-shaped pattern portion 11b is filled with the line of the confirmation pattern 12, and as a result, The portion of the pattern part 11b looks like a solid color (in FIG. 4A, it is indicated by the sign of the moiré pattern 13).

In addition, the hidden pattern 11 and the confirmation pattern 12 are relatively shifted from the above-described state in which the confirmation pattern 12 is superimposed on the hidden pattern 11, so that the lines forming the confirmation pattern 12 are framed by the hidden pattern 11. When it is made to exactly overlap on the lines forming the pattern part 11b, the frame-like pattern part 11b is formed as shown in FIG.
Looks like the original line pattern, but the non-line part of the central pattern part 11a is filled with the line of the confirmation pattern 12, so the central pattern part 11a is painted out. (In FIG. 4 (b), indicated by the reference numeral of the moiré pattern 13).

The portion other than the pattern portions 11a and 11b of the hidden pattern 11, that is, the background portion 11 of the hidden pattern
In any of the above cases, c does not change in the state in which the lines are orthogonal to each other, and therefore looks uniform.

In FIG. 3A, the hidden pattern 11
Is enlarged and illustrated, so that both the pattern portions 11a and 11b surrounding the central portion and the periphery thereof seem as if they are distinguished from the background portion 11c. The width and the pitch are small, and the line portions occupy the same area in the unit area between the pattern portions 11a and 11b and the background portion 11c (in the example of FIG. %), And it is very difficult to determine the hidden pattern 11 with the naked eye because there is no density difference.

However, as shown in the above example, when the confirmation pattern 12 is superimposed on the hidden pattern 11, the pattern portions 11a and 11b have a line portion ratio of either 50% or 100%. Therefore, a difference from 75%, which is the ratio of the line of the background portion, occurs, and the visual recognition becomes possible.

FIGS. 5 and 6 are diagrams showing another combination of the hidden pattern and the confirmation pattern. In each of the figures, (a) shows a hidden pattern, each of which is formed by a square halftone dot, and the hidden pattern itself is common to FIGS. 5 and 6. FIG. (B) is a diagram showing a confirmation pattern, and (c) is a diagram showing a state where a confirmation pattern is superimposed on a hidden pattern.

The hidden pattern 11 is composed of halftone dots each having a square outer shape. Vertical and horizontal grid lines indicate that the position of each halftone dot is intentionally shifted from the grid-like arrangement. Grid lines are vertically and horizontally spaced at equal intervals, and the vertical and horizontal lines are orthogonal to each other.

First, regarding the arrangement of the halftone dots in the horizontal direction (x-axis direction in a general graph), the halftone dots in the leftmost column (first column) of the hidden pattern 11 are shown. In each case, the left side and the lower side of the halftone dot are arranged at the upper right of each grid point in contact with the grid line. The uppermost row (referred to as the first row) and the lowermost halftone dot are arranged such that the left side of the halftone dot is in contact with each lattice. Each of the other halftone dots is located at the center between the grids in the horizontal direction. However, the left sides of the four halftone dots in the fourth and fifth rows of the fourth and fifth columns are in contact with the grid lines. I have. Also, each halftone dot, except for the halftone dot in the first row, is slightly shifted upward (in the graph, in the positive direction of the y-axis) toward the rear row, and as a result, is the last row. The halftone dot in the eighth column is arranged at the center between the lattices in the y-axis direction.

The confirmation pattern 12 which can confirm the above-mentioned hidden pattern 11 is, for the hidden pattern shown in FIG. 5A, one in which each line is arranged in the x-axis direction (FIG. 5A).
(B)), or each line is arranged in the y-axis direction (FIG. 6 (b)), and the two are rotated by 90 ° with respect to each other. Each of the confirmation patterns is formed of a line, and the width of the line is formed so as to be equal to one side of a halftone dot of the hidden pattern.

First, the hidden pattern 11 shown in FIG.
The confirmation pattern 12 shown in FIG. Here, it is assumed that the lower side of each line of the parallel lines constituting the confirmation pattern 12 is overlapped with the horizontal line of the grid lines of the hidden pattern 11. By doing so, the halftone dots in the first row become invisible because they are covered by the lines, but the halftone dots in the second and subsequent rows are placed in the rear row based on the displacement from the grid at the position where they are arranged. As the number of lines increases, the lines gradually appear to extend beyond the lines of the line, and as a whole, a visual pattern having a gradation in which the density is increased toward the right side is given.

The hidden pattern 11 shown in FIG.
The confirmation pattern 12 shown in FIG. Here, it is assumed that the left side of each of the lines forming the confirmation pattern 12 is in contact with the vertical line of the grid lines of the hidden pattern 11. By doing so, the halftone dots in the first column, the halftone dots in the first row and the bottom row, and the fourth row and the fifth row in the fourth and fifth columns, which were arranged in contact with the grid lines,
The four halftone dots in the row disappear because they are covered by the lines, but the other halftone dots are shifted to the right by the same amount from the grid where they are located, so the right half of the halftone dots The lines appear to protrude from each line, and as a whole, a visual pattern having a substantially frame-shaped outer shape is provided.

In the above example, the hidden pattern composed of the lines and the confirmation pattern composed of the lines, and the combination of the hidden pattern composed of the halftone dots and the confirmation pattern composed of the lines have been described. However, other than these, a combination of a hidden pattern constituted by halftone dots and a confirmation pattern constituted by halftone dots, and a combination of a hidden pattern constituted by a line and a confirmation pattern constituted by halftone dots are also possible.

Further, in the example described with reference to the drawings, in the superposition of the lines and the halftone dot and the lines, the interference is caused by the substantially parallel overlap so that the hidden pattern can be seen. However, they may not overlap, but may be overlapped at a small angle that is relatively parallel, for example, 20 ° or less, or 15 ° or less. In either case, if the halftone dots or lines are exactly overlapped or the top is larger, the lower one is not visible at all from above, but the lower one is If it protrudes from the object, an interference effect occurs in which the part visually enhances. That is, the hidden pattern formed by the halftone dots or the lines in the present invention interferes with the confirmation pattern formed by the halftone dots or the lines. It should be noted that a pattern seen due to interference is often called a moiré pattern, and in this specification, a visual pattern that has become visible due to a confirmation pattern is also called a moiré pattern.

Further, the halftone dot referred to here may be formed in a shape other than the normal halftone dot shape such as a quadrangle or a circle, for example, a symbol or a character. Also, the halftone dots may be arranged on a straight line, or may be arranged on a wavy line such as a curve or a sine curve. Shape. A shape having a length several times or more as large as a line width has no halftone dot or a solid line. ". In addition, the halftone dots or lines forming the hidden pattern and the confirmation pattern need not be constant, and may be changed in synchronization with each other in both the hidden pattern and the confirmation pattern.

In the above description, it is assumed that only one of the hidden pattern and the confirmation pattern is formed on one layer. However, both the hidden pattern and the confirmation pattern are formed on one layer. You can also. For example, in one of the two layers, a hidden pattern is formed in the right half, and a confirmation pattern is formed in the left half,
If a confirmation pattern is formed in the right half and a hidden pattern is formed in the left half on the other layer, the two layers are overlapped, and the authenticity can be identified on both the left and right sides. In this manner, three or more layers in which the hidden pattern and the confirmation pattern are mixed in one layer may be combined. In the case of three or more layers, it is assumed that three layers, for example, the A layer, the B layer, and the C layer are involved, and the right half can be authenticated by the A layer and the B layer. The authenticity identification may be performed between the B layer and the C layer.

In the structure of the authenticity identification body 1 of the present invention, the formation position of the hidden pattern and the formation position of the confirmation pattern in the structure described with reference to FIG. There can be. The hologram part has better security (= forgery prevention) and design than the pattern part has a hidden pattern, and the same applies to the confirmation pattern. , And the price is high due to the complexity of the manufacturing process. Further, the visibility (contrast) of the moire pattern is better when the hidden pattern is formed by printing or the like, and the confirmation pattern is better when formed by printing or the like. Therefore, the structure of the authenticity identification body 1 and the method of forming the pattern will be described next, separately from the formation position of each pattern.

The base material 2 is often a plastic sheet for a card such as a credit card, and is often a paper for a voucher or an identification card. Including these, as the material of the base material 2, polyvinyl chloride, polyvinyl alcohol, polysulfone, polyester such as polyethylene terephthalate, polyarylate, polycarbonate, polyamide, polyimide, cellulose diacetate, cellulose triacetate, polystyrene, acrylic, polypropylene, In addition to a resin such as polyethylene or polyolefin vinyl alcohol, a metal sheet such as aluminum or copper, paper, and an impregnated paper such as resin or latex, or a composite sheet can be used. When heat resistance is required, a sheet of an amorphous polyester resin, a blend resin of an amorphous polyester resin and a polycarbonate resin, or the like can be used as a material of the base material 2.

The thickness of the substrate 2 varies depending on the material, but is usually in the range of about 10 μm to 5 mm. Particularly, in the case of a magnetic card, when the base sheet conforms to the ISO standard, its thickness is 0.76 mm. When the substrate 2 is formed of a polyvinyl chloride resin (hereinafter, PVC), usually, a white PVC sheet having a thickness of 280 μm is used as a core sheet, two of which are stacked, and a transparent PVC sheet having a thickness of 100 μm is provided on both sides thereof. A four-layer base material (a total thickness of 0.76 mm) is used in which the sheets are stacked as oversheets and stacked by hot pressing or the like.

The hologram layer 5 is a layer in which a light diffraction structure is formed on a synthetic resin layer in a broad sense, and a typical light diffraction structure is a hologram. Here, for convenience, the hologram light diffraction structure layer is referred to as a hologram layer. As the hologram, both a plane hologram and a volume hologram can be used. Specific examples include a relief hologram, a Lippmann hologram, a Fresnel hologram, a Fraunhofer hologram, a lensless Fourier transform hologram, a laser reproduction hologram (such as an image hologram), and a white light reproduction hologram. (Such as a rainbow hologram), a color hologram, a computer hologram, a hologram display, a multiplex hologram, a holographic stereogram, and a holographic diffraction grating. In addition to the method using the holographic recording method, the diffraction grating may be directly formed by mechanical cutting or by using an electron beam or a laser beam.

The synthetic resin constituting the hologram layer 5 includes polyvinyl chloride, acrylic resin (eg, PMMA),
Thermoplastic resins such as polystyrene and polycarbonate,
Unsaturated polyester, melamine, epoxy, polyester (meth) acrylate, urethane (meth) acrylate, epoxy (meth) acrylate, polyether (meth) acrylate, polyol (meth) acrylate,
Thermosetting resins such as melamine (meth) acrylate and triazine acrylate can be used alone or in combination with the thermoplastic resin and the thermosetting resin. Further, radical polymerizable unsaturated groups can be used. It is possible to use a thermoformable substance having the composition or a substance obtained by adding a radical polymerizable unsaturated monomer to the composition to make the composition curable with ionizing radiation. In addition, silver salts, gelatin dichromate, thermoplastics, diazo photosensitive materials, photoresists,
Photosensitive materials such as ferroelectrics, photochromic materials, thermochromic materials, and chalcogen glass can also be used. In addition, if the hologram layer 5 is made of a material having a low layer strength, and if the hologram layer 5 is to be peeled, the hologram layer 5 will be destroyed. Has the effect of becoming

The formation of the hologram on the resin layer is performed as follows.
It can be formed by a conventionally known method using the above materials. When recording the interference fringes of the hologram as a relief of surface irregularities, using an original plate in which the interference fringes are recorded in the form of irregularities as a press mold, superimposing the original plate on the resin layer, and appropriately using a heating roll or the like. By heat-pressing the both, the concave and convex pattern of the original plate can be duplicated. In the case where a photopolymer is used, the original can be duplicated by irradiating the original with a laser beam on the photopolymer layer. In the above,
The resin layer or photopolymer layer forming the hologram may be lined with a transparent substrate film or sheet for forming those layers.

As described above, the relief of the surface irregularities
The method of recording interference fringes on the surface of the hologram layer 5 is particularly preferable because it has mass productivity and can reduce the cost. The thickness of such a hologram layer 5 is preferably in the range of 0.1 to 6 μm, more preferably in the range of 1 to 4 μm.

When interference fringes are recorded as reliefs on the surface of the hologram layer 5 as described above, in order to increase the diffraction efficiency, as described with reference to FIG.
It is preferable to form the reflection layer 5b on the relief surface. In this case, the entire laminated structure in which the reflective layer 5b is laminated is replaced with the hologram layer 5, and in such a laminated structure, the portion laminated with the reflective layer 5b is replaced with the hologram forming layer 5b.
Let's call it a.

As the reflection layer 5b, a thin metal film such as aluminum which reflects light is formed on the relief surface. As the metal thin film, in addition to aluminum, Cr, Fe, Co, N
i, Pd, Cu, Ag, Au, Ge, Mg, Sb, P
b, Cd, Bi, Sn, Se, TI, Fe, Te, Z
It is formed using a metal such as n, In, Ga, or Rb, an oxide, a nitride, or an alloy composed of a combination of these metals. Of these, Al, Cr, N
i, Ag, Au, etc. are particularly preferred.

The reflection layer 5b made of a metal thin film is formed by a thin film forming method such as a vacuum evaporation method, a sputtering method and an ion plating method. The thickness of the reflective layer 5b may be set under appropriate conditions depending on the color tone, design, application, and the like, but is generally preferably in the range of 50 to 1 μm, and more preferably 100 to 1000 °. In order to secure the transparency of the reflective layer 5b, the thickness is set to 2
It is preferably set to not more than 00 °. When it is desired to provide the reflective layer 5b having a concealing property, the film thickness is desirably 200 mm or more. As described above, the thin film can be set as necessary in consideration of the use of the transfer foil and the total design, such as color tone, concealing property, and transparency.

As a material of the reflection layer 5b, a continuous thin film of a substance having a different refractive index from that of the hologram formation layer 5a may be used. The thickness of the continuous thin film may be any as long as it is a transparent region of the material forming the thin film, but is usually preferably 100 to 1000 °. Examples of a method for forming a continuous thin film on the relief surface include a thin film forming method such as a vacuum deposition method, a sputtering method, and an ion plating method. The continuous thin film may have a refractive index larger or smaller than that of the light diffraction structure layer, but preferably has a refractive index difference of 0.3 or more, and a difference of 0.5 or more.
More preferably, it is 1.0 or more.

Higher refractive index than hologram forming layer 5a
As a continuous thin film, ZnS, TiO _Two, Al_Two O_Three , S
b_Two S_Three , SiO, TiO, SiO_Two Etc.
You. Continuous thin film having a lower refractive index than the hologram forming layer 5b
LiF, MgF_Two , AlF_Three Etc.
You. When the thickness is 200 mm or less, the light transmittance
Is relatively small, the transparent layer 5b
Can be used. Further, the hologram forming layer 5
a is a transparent synthetic resin having a different refractive index, for example, polyethylene.
Trafluoroethylene, polychlorotrifluoroethylene
, Polyvinyl acetate, polyethylene, polypropylene,
A layer of polymethyl methacrylate may be used for the reflective layer 5b.
Can also be. If the hologram layer has a hidden pattern or
One of the recognized patterns and hidden on the lower side
When there is no other pattern or confirmation pattern
Does not necessarily require the transparency of the reflective layer,
On the bottom side of the layer, a hidden pattern or confirmation pattern
When having the other, the reflective layer has transparency
Desirably.

The hologram layer 5 is formed on the pattern layer 3 on the substrate 2 as shown in FIG. 1 or on the first pattern layer 3a on the substrate 2 as shown in FIG. In this case, it is preferable that the layers are laminated via the adhesive layer 4.
The adhesive layer 4 is made of the following adhesive or adhesive, and has a thickness of 3 μm to 20 μm.

Examples of the adhesive include acrylic resin,
Acrylic ester resins or their copolymers, styrene-butadiene copolymers, natural rubber, casein, gelatin, rosin esters, terpene resins, phenolic resins, styrene resins, cumarone indene resins, polyvinyl ether, silicone resins And the like, and α
-Adhesives of cyanoacrylate type, silicone type, maleimide type, styrene type, polyolefin type, resorcinol type, polyvinyl ether type, silicone type and the like.

In addition to the above, a heat sealant can also be used since it exhibits tackiness when heated. For example, ethylene-vinyl acetate copolymer resin, polyamide resin, polyester resin, polyethylene resin, ethylene-
Isobutyl acrylate copolymer resin, butyral resin, polyvinyl acetate and its copolymer resin, cellulose derivative, polymethyl methacrylate resin, polyvinyl ether resin, polyurethane resin, polycarbonate resin, polypropylene resin, epoxy resin, or phenol resin can be used. . Alternatively, SBS (styrene-butadiene-styrene block copolymer), SIS (styrene-isoprene-styrene block copolymer),
A thermoplastic elastomer such as SEBS (styrene-ethylene-butylene-styrene block copolymer) or a reaction hot-melt resin may be used.

The method of forming a hidden pattern or a confirmation pattern in the present invention is as follows. That is, a hidden pattern or a confirmation pattern is formed on the hologram layer 5 by optical means during hologram formation. Further, a hidden pattern or a confirmation pattern is formed on the base material 2 or the hologram layer by means such as printing.

In order to form a hidden pattern or a confirmation pattern on the hologram layer by optical means, before or after interference exposure for forming a hologram, a film having a hidden pattern or a confirmation pattern formed thereon By exposing a layer of an ultraviolet curable resin or the like for forming a hologram layer by using
Can do it. Note that interference exposure can be performed through the above-mentioned film to form a hidden pattern or a confirmation pattern.

Exposure to the ultraviolet curable resin layer for forming the hologram layer using the film on which the hidden pattern or the confirmation pattern is formed may be performed by drawing using an electron beam on the electron beam curable resin layer. it can. In this case, the hidden pattern or the confirmation pattern and the hologram are simultaneously formed by performing exposure based on the combined drawing information obtained by combining the drawing information about the hidden pattern or the confirmation pattern and the drawing information about the hologram. Can be.

As described above, a hologram having a hidden pattern or a confirmation pattern formed by using an ultraviolet ray or an electron beam, when the interference fringes of the hologram are formed by the relief of the surface irregularities, Copy the uneven shape onto the surface of another resin plate or metal plate, make a mold for duplication, and perform duplication using the obtained mold for duplication to obtain a hologram having a hidden pattern or confirmation pattern be able to. When using an electron beam, a mold for hologram replication can be directly manufactured using a metal plate coated with a resist.

In order to form a hidden pattern or a confirmation pattern on the base material 2 or on the hologram layer 5 (including the hologram forming layer 5a), means such as printing, specifically, printing or similar printing is used. Means, that is, letterpress printing, planographic offset printing, gravure printing, or ordinary printing method such as screen printing, or, electrophotography,
A printing-like system such as ink jet can be used. Further, transfer by thermal printing means such as a thermal head can also be used as one of the latter ranges. In the authenticity identifier 1 described with reference to FIG. 1B and the authenticity identifier 1 described later with reference to FIG. 8, both the hidden pattern and the confirmation pattern can be formed by printing or the like. There is an advantage that the interference between the two patterns is clear and the moire pattern is easily seen. In addition, since the target layer is not fixed, as in the case of forming the pattern on the hologram layer, the pattern is formed by printing. Since it can be a printing target, it is not always necessary to directly form a pattern on the upper surface or the lower surface of the hologram layer 5.

When the above-described printing or printing-like means is used, a hidden pattern or a confirmation pattern can be formed in any color by selecting ink or toner. Although there is no particular limitation on the color, it is easier to check the hidden pattern if a high-contrast pattern is formed.In that sense, high density, especially black, is suitable. On layer (including on hologram forming layer 5a)
The hologram itself looks dark,
In consideration of the visibility of the hologram, it is preferable to form the hidden pattern or the confirmation pattern by lowering the density.

In the above description, the method of forming the hidden pattern or the confirmation pattern has been described in accordance with the structure of the authenticity identification body 1 described with reference to FIGS. Since layers other than those described above may be added to the identification body 1, such a structure and formation of a hidden pattern or a confirmation pattern in such a case will be described.

FIG. 7 shows a structure in which a peeling layer 6 is laminated on the hologram layer 5 of the authenticity discriminator described with reference to FIG. The authenticity identification body 1 having the structure shown in FIG. 7 has a hologram in which a transfer layer composed of a release layer 6, a hologram layer 5, and an adhesive layer 3 is releasably laminated from the film side on the lower surface of a releasable film. Using a transfer sheet,
This is a laminated structure obtained in a case where a film is removed by performing transfer onto the pattern layer 3 on the base material 2 and manufacturing is performed. In the hologram transfer sheet shown in FIG. 7 and in the above description, the hologram layer 5 is replaced with the laminated structure composed of the reflection layer 5 and the hologram formation layer 5a from the lower side described with reference to FIG. It may be. The positions at which the hidden pattern and the confirmation pattern are formed on the authenticity identification body 1 in which the release layer 6 is laminated on the uppermost surface as described above are the same as those described with reference to FIG.
On the hologram layer 5 or the substrate 2.

FIG. 8 shows a structure in which a transparent substrate film 7 is laminated between the hologram layer 5 of the authenticity discriminator and the second pattern layer 3b described with reference to FIG. 1B. ing. The authenticity discriminator 1 having the structure shown in FIG. 8 includes a hologram label in which a hologram layer 5 and an adhesive layer 3 are sequentially laminated on the lower surface of a transparent substrate film 7 on a first pattern layer 3 a on a substrate 2. This is a laminated structure obtained in the case of manufacturing by laminating the layers. In FIG. 8 and the hologram label described above, the hologram layer 5 is replaced with the laminated structure composed of the reflection layer 5 and the hologram formation layer 5a from the lower side described with reference to FIG. May be used. For the authenticity identification body 1 in which the transparent substrate film 7 is laminated between the hologram layer 5 and the second pattern layer 3b as described above, the first pattern layer 3a and the second pattern layer 3b, any of the hidden patterns,
A confirmation pattern is formed on the other side.

In the above, as the transparent substrate film 7, the heat resistance required when the layers to be laminated are sequentially laminated by coating or the like when producing a hologram label,
Solvent resistance, and when transferring the formed hologram label onto an adherend such as a card base material, the heat resistance is necessary, and a plastic film having these properties, for example, biaxially stretched polyethylene A terephthalate film (hereinafter, simply referred to as a PET film) or the like can be used. It is preferable that the transparent base film 7 is transparent in manufacturing the hologram transfer sheet and in confirming the manufactured hologram transfer sheet. When using a PET film, its thickness is
The thickness is preferably 5 to 250 μm, and in consideration of workability, tensile strength, and thermal efficiency at the time of thermal transfer, it is 10 to 50 μm.
m is more preferred. The material of the transparent base film 7 can also be used as a film which is a base material of the hologram transfer sheet described in the description with reference to FIG.

Further, the release layer 6 in the above-mentioned mode makes the transfer layer of the hologram transfer sheet appropriately adhere to the film, and enables smooth release at the time of transfer. Release layer 6
Is, for example, a film-like substrate 10 such as a polyester resin.
It is obtained by adding wax, silicone resin, or the like to a resin having an adhesive property with the resin. Specifically, release layer 1
4, a resin selected from an acrylic skeleton resin such as an acrylic resin, a vinyl chloride / vinyl acetate copolymer, a mixture of cellulose acetate and a thermosetting acrylic resin, a melamine resin, or a nitrocellulose resin; It is composed of a resin composition in which polyethylene wax, wax, silicone resin or the like is blended as an additive. Polyester resins can be added to the above resins to adjust the release force, especially to increase the release force. These resins and additives are dissolved or dispersed together with a suitable solvent, and the release layer forming ink composition or coating composition is applied by a known printing means or coating means,
The release layer 6 can also be formed by drying and solidifying, and the thickness when dried is 0.1 to 10 μm.

FIG. 9 shows an example in which the authenticity identification body 1 of the present invention is applied to a gift certificate. As shown in FIG. , The confirmation pattern 12 is printed, and the confirmation pattern 12 is printed on the confirmation pattern 12 as shown in FIG.
As shown in the figure, by providing the hologram having the same outer shape as the confirmation pattern 12 and the hidden pattern,
The face value display of “Ichi-yen” appears as the moiré pattern 13. Even if the hidden pattern and the confirmation pattern are exchanged with each other, the face value display of “Ichi-yen” similarly appears as the moiré pattern 13.

The material of the substrate 2 of the authenticity identification body 1 of the present invention is as described above, but these substrates 2 are substrates of various information recording bodies. For example, the base material 2 has an ID
It may be the base material of a card for (identification). The ID card is, for example, a savings card at a bank, a credit card, an identification card (student ID or employee ID),
Although it is not in a card format, it may be an examination ticket for ID, a passport, or the like. On these substrates, so-called ID information is recorded by various known means.

The substrate 2 of the authenticity identification body 1 of the present invention
May be a substrate such as a banknote, a gift certificate, a stock certificate, or a security. Information such as the amount of money or the number of units similar thereto is recorded on these base materials. In addition, the base material 2 of the authenticity identification body 1 of the present invention includes a driver's license, a card-type certificate, for example, security such as fire protection, disinfection or fire protection, sanitary qualification,
Alternatively, it may be a substrate such as one showing a grade. Each of these base materials has recorded therein information that is guaranteed or certified. The base material of a winning ballot ticket, a car ticket, etc. such as a lottery ticket, a horse race, a bicycle race, and the like can also be the base material 2 of the authenticity identification body 1 of the present invention. On these base materials, information such as numbers to be drawn is recorded. Both types of information are important if they are fraudulently forged and cause economic damage and confusion. Since all of the information recording bodies described above are also printed matter, it can be said that the authenticity identification body 1 of the present invention is formed on a base material of a printed matter, in other words, on a printed base material.

The base material 2 of the authenticity discriminating body 1 of the present invention may be, in addition to the above-mentioned ones, expensive watches such as luxury watches, jewelry, precious metals or antiques, so-called brand-name products. It may be a luxury product or a packaging container such as a box, case, or bag that stores them,
Alternatively, a copy itself in which software such as music software, video software, computer software, or game software is stored in a medium such as a magnetic recording medium or an optical recording medium, a box or case for storing the same. Packaging container. Because of their high prices, counterfeits and duplicates are easily made with unfair intentions.

[0062]

According to the first aspect of the present invention, since the information recording medium has a hidden pattern in one of the pattern layer and the hologram layer on the base material and a confirmation pattern on the other, a separate confirmation tool is used. You can check the visual pattern that occurs when the hidden pattern and the confirmation pattern overlap each other, so you can recreate each of the hidden pattern and the confirmation pattern as if they were on separate bodies and impersonate the real thing Therefore, it is impossible to duplicate an overlapping pattern as a visual pattern, and it is possible to provide an authenticity identification object which is extremely difficult and has a high anti-counterfeiting effect. According to the second aspect of the present invention, since the hidden pattern and the confirmation pattern are provided on the base material with the hologram interposed therebetween, in addition to the same effect as the first aspect of the present invention, the generated moiré pattern is easily visible. An authenticity identifier can be provided. According to the third aspect of the present invention, in addition to the effects of the first or second aspect of the present invention, since the hologram layer is laminated on the pattern layer via the adhesive layer, it is illegal to peel off only the hologram layer. It is possible to provide an authenticity identifier that is difficult to perform. According to the invention of claim 4, in addition to the effect of any one of claims 1 to 3, the visibility of the hologram is improved because the hologram layer is constituted by a hologram forming layer whose lower surface is lined with a reflective layer. Can provide an excellent authenticity discriminator. According to the fifth aspect of the present invention, it is possible to provide an authenticity identification body having a card format capable of exhibiting the effects of any one of the first to fourth aspects of the present invention.

[Brief description of the drawings]

FIG. 1 is a diagram showing a basic structure of an authenticity identification body of the present invention.

FIG. 2 is a diagram showing a structure of a hologram layer.

FIG. 3 is a diagram showing a hidden pattern and a confirmation pattern formed by a line.

FIG. 4 is a diagram of a moire pattern generated by overlapping a hidden pattern and a confirmation pattern.

FIG. 5 is a diagram showing a hidden pattern, a check pattern, and a moiré pattern composed of halftone dots, lines, and the like.

FIG. 6 is a diagram showing an example in which the direction of a confirmation pattern formed by a line is changed.

FIG. 7 is a view showing a structure of an authenticity identification body having a release layer.

FIG. 8 is a view showing a structure of an authenticity identification body having a transparent base material film.

FIG. 9 is a diagram showing an example in which the authenticity identification body of the present invention is applied to a gift certificate.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Authenticator 2 Base material 3 Pattern layer (3a; 1st pattern layer, 3b; 2nd pattern layer) 4 Adhesive layer 5 Hologram layer (5a; Hologram formation layer, 5b)
Reflective layer) 6 Release layer 7 Transparent substrate film 8 Printing 11 Hidden pattern 12 Confirmation pattern 13 Moiré pattern

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C005 HA02 HB02 HB09 HB10 HB11 JB08 JB25 KA02 KA08 KA37 KA48 LA03 LA19 2K008 AA13 CC00 DD13 EE04 FF02 FF03 FF12 FF17 FF21 FF24 FF27 GG01 GG1 HH01304

Claims (5)

[Claims] 1. A pattern layer and a hologram layer are laminated on a base material of an information recording medium, and one of the pattern layer and the hologram layer forms a hidden pattern formed by halftone dots or lines. An authenticity discriminator, wherein the authenticity discriminator has a confirmation pattern composed of halftone dots or lines. 2. A first pattern layer, a hologram layer, and a second pattern layer are sequentially laminated on a base material of an information recording body, and the first pattern layer, the hologram layer, and the second pattern layer are sequentially stacked. One of which has a hidden pattern formed by a halftone dot or a line, and the other has a confirmation pattern formed by a halftone dot or a line. . 3. The authenticity identification body according to claim 1, wherein the hologram layer is laminated on the pattern layer via an adhesive layer. 4. The authenticity identification body according to claim 1, wherein the hologram layer is a reflection layer having transparency from a lower layer side and a hologram formation layer on which a hologram is formed. 5. The authenticity identification body according to claim 1, wherein the information recording body is a card.