JP2002311835A - Material for recording invisible individual information, label for adhering invisible individual information and transfer sheet for invisible individual information - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that it is difficult to confirm the diversion of a hologram separated from a proper object in a conventional technology and a hidden pattern is in danger of being analyzed and copied since the hidden pattern is increased by separation. SOLUTION: In the label for adhering invisible individual information, a transparent base material 6, a hologram forming layer 3, a reflection layer 2 and an adhesive layer or a thermosensitive adhesive layer 7 are laminated in order from an upper part. In the reflection layer 2, invisible individual information 4 which is constituted of the aggregation of fine holes or a fine area being different from a circumference in a reflectance and which forms a moire pattern in the case of superimposition on the confirmation pattern of another individual body is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a hologram reflecting layer, which comprises an invisible pattern which cannot be determined by the naked eye.
The present invention relates to an invisible individual information recording material in which individual information is formed and a moiré pattern is generated when it is overlapped with a confirmation pattern, and the recording material is applicable to another adherend. It also relates to a structure of a label or a transfer sheet.

[0002]

2. Description of the Related Art Articles having direct or indirect economic or other value can be manufactured as if they were genuine, used or discarded and used as if they were genuine. It is easy to be remodeled.

[0003] Examples of such articles include those that generate a monetary value when used, such as cards such as savings and savings cards and credit cards, and face value, such as banknotes, securities, and gift certificates such as gift certificates. While there is no direct monetary value, such as a share certificate, lottery ticket, betting ticket, etc. with the stated value, speculative or other value determined by other factors, and passports or identification cards,
One that guarantees the qualifications and behavior of the person in possession. Also, high-priced wristwatches and high-priced products such as so-called branded products are likely to be forged or altered.

Conventionally, various measures have been taken to prevent forgery or falsification of these articles.
Holograms are often used in cash vouchers or high-priced goods. Holograms use laser light technology, photosensitive resin technology,
It is a technically advanced product obtained by combining various technologies that cannot be said to be versatile, such as a technology for manufacturing a duplication mold from the original hologram prototype, and it can express a three-dimensional effect It is difficult to make a copy by a method using a color copier or a color scanner.

[0005] However, although the production of holograms is technically advanced, it can be counterfeited by the acquisition of technology, and efforts are being made to make duplication of holograms more difficult. For example, JP-A-11-2779
Japanese Patent Publication No. 62 discloses an image forming body provided with a hologram forming layer and a hidden pattern forming layer in which a hidden pattern is formed by halftone dots or lines. The hidden pattern can be visualized by superimposing a check pattern composed of separate halftone dots or lines.

However, according to the above-mentioned prior art, the hidden pattern is a common pattern formed for confirming the authenticity of the hologram, and since the same hologram exists in a large number, it is stuck on another similar article. If a hologram is peeled off and used, even if a hidden pattern is confirmed,
It is unknown whether the hologram was properly affixed and whether the affixed article was legitimate. Also, since the hologram forming layer and the hidden pattern layer are different layers,
Careful separation reveals the presence of hidden patterns and can be duplicated. Therefore, a measure that can specify each hologram is further desired.

[0007]

Therefore, in the present invention, it is difficult to confirm that a hologram separated from a legitimate object is diverted in the above-mentioned prior art, and the hidden pattern is It is an object of the present invention to avoid the possibility of being analyzed and duplicated, which is separation and addition.

[0008]

In the above prior art, a hidden pattern formed on a layer different from the hologram forming layer is used.
By irradiating a reflective layer made of metal or the like, which is one of the layers constituting the hologram, with a laser or the like using a laser or the like, the above-mentioned problem was solved. In addition, the problem can be solved by using the hologram including the hidden pattern as a label structure or a transfer sheet structure.

The first invention comprises at least a hologram-forming layer and a reflection layer, and the reflection layer is constituted by a set of micropores or microareas having different reflectances from the surroundings. The present invention relates to an invisible individual information recording material, wherein invisible individual information is formed by an invisible pattern capable of forming a moire pattern. The second invention relates to the invisible individual information recording material according to claim 1, wherein the invisible pattern, or the confirmation pattern and the invisible pattern, are constituted by halftone dots or lines. It is. In a third aspect, the hologram-forming layer of the invisible individual information recording material according to claim 1 or 2 is laminated on a lower surface of a transparent substrate sheet so as to face the transparent substrate. The present invention relates to a label for attaching invisible individual information, wherein an adhesive layer is laminated on a lower surface of the reflection layer of the invisible individual information recording material. In a fourth aspect, the hologram-forming layer of the invisible individual information recording material according to claim 1 or 2 is laminated on a lower surface of a transparent substrate sheet so as to face the transparent substrate. The present invention relates to a label for attaching invisible individual information, wherein a heat-sensitive adhesive layer is laminated on a lower surface of the reflection layer of the invisible individual information recording material. According to a fifth aspect of the present invention, the hologram forming layer of the invisible individual information recording material according to claim 1 or 2 is laminated on the peelable surface on the lower surface of the peelable support sheet facing the support sheet. Further, the present invention relates to a brittle label for sticking invisible individual information, wherein an adhesive layer is laminated on a lower surface of the reflection layer of the invisible individual information recording material. In a sixth aspect of the present invention, the hologram forming layer of the invisible individual information recording material according to claim 1 or 2 is laminated on a peelable surface on a lower surface of the support sheet so as to face the support sheet. In addition, the present invention relates to an invisible individual information transfer sheet, wherein a heat-sensitive adhesive layer is laminated on a lower surface of the reflection layer of the invisible individual information recording material.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. As illustrated in FIG. 1, the invisible individual information recording material 1 of the present invention includes a hologram-forming layer 3 on which a hologram is formed, and a reflection layer 2 laminated on a lower surface. The invisible individual information 4 is formed by an invisible pattern composed of a set of.
The invisible pattern may not be a set of micropores, but may be composed of a set of microareas having different reflectances from the surroundings,
It is composed of a halftone dot or a line composed of a set of fine holes or a set of fine areas having different reflectances from the surroundings. The invisible individual information based on the invisible pattern is
Any type may be used, for example, a serial number, an arbitrary combination of letters and numbers, and the like, and any type can be used as long as it can produce many different things. In this figure, the hologram forming layer 3 is depicted as a relief hologram having fine irregularities on the lower surface, but is not limited thereto.

The invisible individual information 4 in the invisible individual information recording material 1 is preferably superimposed with a confirmation pattern having a regular arrangement of halftone dots or lines to generate a moiré pattern, thereby improving visibility. Is caused. The invisible individual information recording material 1 can use this laminated structure as it is for a tag or the like.
Usually, as will be described later, a layer such as a label or a transfer sheet to be applied to various articles is often used by adding another layer.

FIG. 2 shows an example in which the label of the invisible individual information is applied by utilizing the structure of the invisible information recording material 1. In this figure, the hologram forming layer 3 and the reflection Layer 2 and pressure-sensitive adhesive layer 7 are sequentially laminated,
The invisible individual information label 5 is formed. The lowermost pressure-sensitive adhesive layer 7 may be the heat-sensitive adhesive layer 7. If necessary, release paper or a release sheet may be attached to the lower surface of the pressure-sensitive adhesive layer 7. The label 5 for pasting the invisible individual information as shown in FIG. 2 can be applied on the adherend by being overlapped and pressure-bonded with the pressure-sensitive adhesive layer 7 being in contact therewith.

FIG. 3 shows an example in which the structure of the invisible information recording material 1 is used to form a brittle label for attaching invisible individual information. In this figure, a support sheet 9 has a release layer laminated on the lower surface side. As a result, the hologram forming layer 3 and the hologram forming layer 3 are formed on the peelable surface on the lower surface of the peelable sheet.
The reflective layer 2 and the pressure-sensitive adhesive layer 7 are sequentially laminated to form a brittle label 8 for attaching invisible individual information. When the hologram-forming layer 3 exhibits releasability from the support sheet 9, the release layer 10 may be omitted. Lowermost pressure-sensitive adhesive layer 7
May be the heat-sensitive adhesive layer 7. If necessary, release paper or a release sheet may be attached to the lower surface of the pressure-sensitive adhesive layer 7.

The invisible individual information sticking brittle label 8 as shown in FIG. 3 is overlaid and pressure-bonded with the pressure-sensitive adhesive layer 7 being in contact with the same, and the peelable sheet is peeled off.
Applicable on adherends. Compared to the invisible individual information sticking label 5 (FIG. 2), it has a similar structure before application to an adherend, but after application, the former has a transparent base material 6 in the uppermost layer. In comparison with the latter, after application, the hologram forming layer 3 corresponds to the transparent substrate 6 after application.
Since it is not above, the hologram forming layer is easily broken by an external force.

FIG. 4 shows an example in which a transfer sheet is formed by utilizing the structure of the invisible information recording material 1. From above, a support sheet 9, a release layer 10, a hologram forming layer 3, a reflective layer 2, and The heat-sensitive adhesive layers 12 are sequentially laminated to form the invisible individual information transfer sheet 11. Also in this case, the release layer 10 may be omitted when the hologram-forming layer 3 exhibits releasability from the support sheet 9. The invisible individual information transfer sheet 11 as shown in FIG. 4 can be applied on an adherend by, as it is, overlying the pressure-sensitive adhesive layer 7 so that the pressure-sensitive adhesive layer 7 is in contact with the sheet and peeling off the peelable sheet. In the state of being adhered to the adherend, the hologram forming layer and the reflective layer constituting the hologram are laminated via an adhesive layer, so that it looks similar to the brittle label of the previous paragraph, Since the adhesive layer is solid at room temperature, the hologram can be reinforced, and the difference is that the pressure-sensitive adhesive layer in the brittle label cannot play the role of reinforcement. If necessary, the invisible individual information transfer sheet 1 has a structure in which a protective layer is laminated on the transferred hologram forming layer 3.
Preferably, a protective layer in contact with the hologram forming layer 3 in 1 is laminated in advance.

Here, the invisible pattern and the confirmation pattern will be described below. FIG. 5A is a diagram illustrating an invisible pattern 21. The invisible pattern 21 includes a horizontally long rectangular pattern portion 21a and a pattern portion 2 at a central portion.
It comprises three parts, a frame-shaped pattern part 21b and a background part 21c, which are in contact with the four circumferences of 1a, and each of the three parts is constituted by a line. Of these three parts, the pattern part 21a and the pattern part 21
“b” is composed of the same upward-sloping lines, except that the lines are shifted by １ ／ pitch in both pattern portions. The remaining background portion 21c is formed 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. Here, the parallel line refers to an aggregate in which lines having a constant width w are arranged at equal intervals at a pitch of 2w.

FIG. 5B shows a confirmation pattern 22 for confirming the invisible pattern 21 shown in FIG. 5A.
2 and the lines forming the pattern portions 21a and 21b surrounding the central portion and the periphery of the invisible pattern 21 described with reference to FIG. 4A have the same pitch and direction (angle). Although the pitch is the same as that of the lines forming the background portion 21c, the directions are orthogonal to each other.

FIG. 6 shows a state in which the invisible pattern 21 and the confirmation pattern 22 in the above example are overlapped. When the confirmation pattern 22 shown in FIG. 5B is superimposed on the invisible pattern 21 shown in FIG. 5A, the lines forming the confirmation pattern 22 constitute a pattern part 21a at the center of the invisible pattern 21. 6A, the pattern portion 21a at the center portion looks similar to the original line shape, as shown in FIG. 6A.
Since the lines other than the lines are filled with the lines of the confirmation pattern 22, the frame-shaped pattern portion 21b appears to be painted as a result (FIG. 6A shows the moire pattern 2).
3 is indicated. ).

From the above state where the confirmation pattern 22 is superimposed on the invisible pattern 21, the invisible pattern 21 and the confirmation pattern 22 are relatively shifted from each other, and the confirmation pattern 2
When the line forming the second pattern 2 is exactly overlapped with the line forming the frame-shaped pattern portion 21b of the invisible pattern 21, as shown in FIG.
1b looks similar to the state of the original line, but in the central pattern portion 21a, a portion that is not a line is identified by the confirmation pattern 2
2 lines are filled, so that the central pattern portion 21a
The portion indicated by is indicated by being painted out (in FIG. 6B, indicated by the sign of the moiré pattern 23).

The portions other than the pattern portions 21a and 21b of the invisible pattern 21, that is, the background portion 21c of the invisible pattern are uniform in any of the above cases because the state in which the lines are orthogonal to each other does not change. Looks like.

In FIG. 5A, the invisible pattern 21
Is enlarged and illustrated, so that both the pattern portions 21a and 21b surrounding the central portion and the periphery thereof seem as if they are distinguished from the background portion 21c. The width and the pitch are small, and the ratio of the line portion to the unit area is equal between the two pattern portions 21a and 21b and the background portion 21c (in the example of FIG. %), And it is very difficult to determine the invisible pattern 21 with the naked eye because there is no density difference. Here, the width of the line is preferably 200 μm or less, more preferably 1 μm or less.
It is not more than 00 μm. When the confirmation pattern is formed by printing, the lower limit is preferably 10 μm or more, more preferably 20 μm or more. When the confirmation pattern is formed by other means, it may be smaller than these. The line pitch is twice the numerical value of these widths. As will be described later, when using a halftone dot instead of a parallel line, the diameter of the halftone dot (in the case of a square, the length of the side) and the pitch are:
It is the same as the width and pitch of the above-mentioned line.

As shown in the above example, by superimposing the confirmation pattern 22 on the invisible pattern 21, the pattern portions 21a and 21b have
Since it is either 50% or 100%, there is a difference from 75%, which is the ratio of the line of the background portion, and visual recognition becomes possible.

FIGS. 7 and 8 are diagrams showing another combination of the invisible pattern and the confirmation pattern. In each of the figures, (a) shows an invisible pattern, each of which is formed of a square halftone dot, the invisible pattern itself is common to FIGS. 7 and 8, and (b) shows a confirmation pattern. (C) is a diagram showing a state in which a confirmation pattern is superimposed on an invisible pattern.

The invisible pattern 31 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. And does not actually constitute an invisible pattern. The 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 each halftone dot in the left-right direction (in a general graph, the x-axis direction), the halftone dot in the leftmost column (the first column) of the invisible pattern 31 is the same. 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:
It touches the grid line. 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 32 for confirming the invisible pattern 31 is, for the invisible pattern shown in FIG. 7A, a pattern in which each line is oriented in the x-axis direction (FIG. 7A).
(B)), or each line is arranged in the y-axis direction (FIG. 8 (b)), and the two lines are rotated relative to each other by 90 °. Each of the check patterns is composed of a line, and the width of the line is formed to be equal to one side of a halftone dot of the invisible pattern.

First, the invisible pattern 3 shown in FIG.
The confirmation pattern 32 shown in FIG.
Here, it is assumed that the horizontal lines of the grid lines of the invisible pattern 31 are overlapped such that the lower sides of the lines forming the confirmation pattern 32 are in contact with each other. 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. The more you go, the more you gradually see the lines out of each line, and as a whole,
A visual pattern having a gradation is obtained in which the density increases as going to the right side.

The invisible pattern 3 shown in FIG.
The confirmation pattern 32 shown in FIG.
Here, it is assumed that the vertical lines of the grid lines of the invisible pattern 31 are overlapped such that the left side of each of the lines forming the confirmation pattern 32 is in contact. By doing so, the halftone dots in the first column, the halftone dots in the first row and the bottom row, and the four halftone dots in the fourth and fifth columns, which are arranged in contact with the grid lines, Halftone dots disappear because they are covered by 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 is It becomes more protruding and gives a visual pattern having a generally frame-like outer shape as a whole.

In the above example, the invisible pattern constituted by the line and the confirmation pattern constituted by the line, and the combination of the invisible pattern constituted by the halftone dot and the confirmation pattern constituted by the line have been described. However, in addition to these, a combination of an invisible pattern composed of halftone dots and a confirmation pattern composed of halftone dots, and a combination of an invisible pattern composed of parallel lines and a confirmation pattern composed of halftone dots are also possible. .

The invisible individual information recording material 1 records invisible individual information composed of an invisible pattern, and a check pattern provided to a separate discriminator includes a regular array of halftone dots and lines. It is recommended to use a material having a regular arrangement of halftone dots and lines on the invisible individual information recording material 1. It is technically possible to use a pattern in which an invisible pattern is formed as a confirmation pattern to be provided to the discriminating tool.
Confirmation pattern and invisible pattern are mixed and formed,
Corresponding to these, a separate discriminating tool having an invisible pattern and a confirmation pattern can be used.

Further, in the example described with reference to FIGS. 7 and 8, in the superposition of the lines and the halftone dot and the lines, interference occurs due to the substantially parallel overlap, and the invisible pattern is seen. However, even if they are not parallel, they may be overlapped at a small angle that is relatively parallel, for example, 20 ° or less, or 15 ° or less. In any case, if the halftone dots or lines are exactly overlapped or the upper one is larger, the lower one is not visible at all from above, but the lower one is upper If it protrudes from an object, an interference effect occurs in which the part visually enhances. That is, in the present invention,
The invisible pattern formed by the halftone dots or the lines interferes with the confirmation pattern formed by the halftone dots or the lines. Note that a pattern that is seen by interference is often called a moiré pattern, and in this specification, a visual pattern that has been seen by a confirmation pattern is also called a moiré pattern.

Further, the halftone dot mentioned here may be formed in a shape other than the normal halftone dot shape such as a square or a circle, for example, a shape of 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 invisible pattern and the confirmation pattern may not be constant, and may be changed in synchronization with each other in both the invisible pattern and the confirmation pattern.

The transparent base material 6 and the support sheet 9 serve to protect the invisible individual information recording material 1 of the present invention at least until it is applied to an adherend. In the case of the label 5 for attaching invisible individual information, the invisible individual information recording material 1 is protected even after being applied to an adherend. Further, when the invisible individual information recording material 1 is formed into a label or a transfer sheet having a structure in the above-described manner, each layer is an object to be formed.

The transparent substrate 6 and the support sheet 9 are often made of a plastic film. Of these, the support sheet 9 is peeled off when the invisible individual information recording material 1 is applied to an adherend. Therefore, it is not always necessary to be transparent, but a transparent material is selected and used as the base material 6 of the label for affixing the invisible individual information which does not peel off even after application.

Specific plastic films constituting the transparent base material 6 and the support sheet 9 include polyesters such as polyvinyl chloride, polyvinyl alcohol, polysulfone, and polyethylene terephthalate, polyarylate, polycarbonate, polyamide, polyimide, and cellulose diester. Plastics such as acetate, cellulose triacetate, polystyrene, acryl, polypropylene, polyethylene, or polyolefin vinyl alcohol can be used.

In the case of the support sheet 9 which does not need to be transparent, it may be used alone or in the form of metal foil such as aluminum or copper, paper, and impregnated paper such as resin or latex, or plastic. Any composite sheet can be used.

The thickness of the transparent substrate 6 and the thickness of the support sheet 9 differ depending on the material, but in the case of a biaxially stretched polyester resin film, it is preferably about 5 μm to 250 μm. In consideration of the thermal efficiency at the time of the above, the thickness is more preferably 10 to 50 μm.

On the lower surface of the support sheet 9, a layer to be transferred or a layer to be separated by peeling is appropriately adhered to the support sheet 9 until transfer or peeling, thereby enabling smooth peeling during transfer. For this reason, the release layer 10 may be laminated.

The release layer 10 is formed, for example, by adding a wax or a silicone resin or the like to a resin having an adhesive property to a transparent substrate film such as a polyester resin.
Specifically, the release layer 7 is made of 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 resin selected from nitrocellulose resin, etc.
If necessary, 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 an appropriate solvent and applied as a release layer forming ink composition or coating composition by a known printing means or coating means, followed by drying and solidification. By doing so, the release layer 7 can be formed.
1 to 10 μm.

The hologram forming layer 3 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. As a hologram, both flat hologram and 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), a white light reproduction hologram (such as a rainbow hologram), a color hologram, a computer hologram, and a hologram. Displays, multiplex holograms, holographic stereograms, holographic diffraction gratings, and the like. 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.

As the synthetic resin constituting the hologram forming layer 3, polyvinyl chloride, acrylic resin (eg, PMM)
A), 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 , A thermosetting resin such as melamine (meth) acrylate or triazine acrylate can be used alone, or a mixture of the above-mentioned thermoplastic resin and thermosetting resin can be used. Or a material obtained by adding a radical polymerizable unsaturated monomer to these materials to make them ionizing radiation-curable.

In addition, photosensitive materials such as silver salts, dichromated gelatin, thermoplastics, diazo photosensitive materials, photoresists, ferroelectrics, photochromic materials, thermochromic materials, and chalcogen glass can be used.

If the hologram forming layer 3 is made of a material having a low layer strength so that the hologram part 6 is broken when the hologram part 6 is to be peeled off, the hologram forming layer 3 is peeled off from the adherend. There is an effect that it is impossible to divert to another.

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 the interference fringes of the hologram are recorded as reliefs with surface irregularities, an original having the interference fringes recorded in the form of irregularities is used as a press mold, and the original is superimposed on the resin layer and a suitable means such as a heating roll is used. Thus, by pressing the two under heat and pressure, the concavo-convex pattern of the original plate can be duplicated. When a photopolymer is used, a photopolymer can be coated on the protective layer of the laminated sheet in the same manner, and then the original can be overlapped and irradiated with a laser beam to perform replication. When forming a hologram, it is preferable to use a layer in which the above-mentioned resin layer is laminated on the transparent substrate 6 or on the releasable surface of a releasable sheet.

As described above, as a relief of the surface irregularities,
The method of recording interference fringes on the surface of the hologram forming layer 3 is as follows.
It is particularly preferable in that it has mass productivity and can reduce the cost.
The film thickness of such a hologram forming layer 3 is 0.1 to 6 μm.
Is more preferable, and the range of 1-4 μm is more preferable.

The reflection layer 2 is formed adjacent to the hologram forming layer 3 and, in the case of a relief hologram, is formed on the relief surface and is made of a thin metal film such as aluminum which reflects light. As the metal thin film, in addition to aluminum, Cr, Fe, Co, Ni, Pd, Cu, A
g, Au, Ge, Mg, Sb, Pb, Cd, Bi, S
It is formed using a metal such as n, Se, TI, Fe, Te, Zn, In, Ga, or Rb, an oxide, a nitride, or an alloy composed of a combination of these metals. Of these, Al, Cr, Ni, Ag, or A
u and the like are particularly preferred.

The reflection layer 2 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 2 may be set under appropriate conditions according to 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 ensure the transparency of the reflective layer 62, the thickness is set to 200 Å.
It is preferable to set the following. When it is desired to provide the reflective layer 62 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 2, a continuous thin film of a substance having a different refractive index from that of the hologram formation layer 3 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 the difference in the refractive index is preferably 0.3 or more, and the difference is 0.5 or more.
More preferably, it is 1.0 or more.

The continuous thin film having a higher refractive index than the hologram forming layer 3 includes ZnS, TiO ₂ , Al ₂ O ₃ , Sb ₂
Examples include S ₃ , SiO, TiO, and SiO ₂ .
Examples of the continuous thin film having a lower refractive index than the hologram forming layer 61 include LiF, MgF ₂ , and AlF ₃ .
When the thickness is 200 ° or less, the transmittance of light is relatively small, so that it can be used as the reflective layer 2 while being transparent. Further, a transparent synthetic resin having a different refractive index from the hologram forming layer 3, for example, a layer of polytetrafluoroethylene, polychlorotrifluoroethylene, polyvinyl acetate, polyethylene, polypropylene, or polymethyl methacrylate is used for the reflective layer 2. Can also.

The pressure-sensitive adhesive layer 7 is made of, for example, an acrylic resin, an acrylate resin, a copolymer thereof, a styrene-butadiene copolymer, a natural rubber, a casein, a gelatin, a rosin ester, a terpene resin, a phenolic resin. , Styrene resin, coumarone indene resin,
Examples thereof include polyvinyl ethers and silicone resins, and adhesives such as α-cyanoacrylate, silicone, maleimide, styrene, polyolefin, resorcinol, polyvinyl ether, and silicone adhesives.

In addition to the above, a heat sealant (a heat-sensitive adhesive) can be used because 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. Or S
Use a thermoplastic elastomer such as BS (styrene-butadiene-styrene block copolymer), SIS (styrene-isoprene-styrene block copolymer), SEBS (styrene-ethylene-butylene-styrene block copolymer), or a reaction hot melt resin. You may. The thickness of the adhesive layer 7 is 3 μm to 20 μm
It is good to

A label and a transfer sheet using the invisible individual information recording material 1 of the present invention may have several layers in addition to the above layers. In the invisible individual information sticking label 5 of FIG. 2, an intermediate layer made of an appropriate resin may be interposed between the transparent substrate 6 and the hologram forming layer 3. An anchor layer may be interposed between them. The same applies to the case where the pressure-sensitive adhesive layer is a heat-sensitive adhesive layer. The brittle label 8 or the transfer sheet of FIGS. 3 and 4 also has an intermediate layer between the release layer 10 and the hologram forming layer 3 and an anchor between the reflective layer 2 and the pressure-sensitive adhesive layer 7 (or heat-sensitive adhesive layer). Layers may be interposed.

The formation of the invisible pattern on the invisible individual information recording material 1 is preferably performed by laser light irradiation. As described above, the pattern to be formed is preferably invisible individual information composed of an invisible pattern, but a part or all of the information has a regular arrangement of halftone dots and lines. Good. The use of laser light makes it easy to write at high speed to the reflective layer based on input information, and thus is suitable for forming individual information. Conventionally, there is an example of recording visible information with a laser,
Forming the invisible individual information is highly significant because it may be counterfeited using a commercially available laser marker.

As the laser light, either continuous light or pulsed light can be used. The continuous light laser light always maintains the same output for a certain period of time, and the pulse light has high output obtained only for a very short time.

The pulse laser light can be obtained by controlling the output of CW laser light (continuous light) by an external modulator, for example, an argon laser, a He—Ne laser, a YAG laser, or a semiconductor laser. it can. In addition, pulsed laser light can be obtained by inserting a Q-switch into the laser oscillator and switching the Q-switch to output the energy stored in the laser medium instantaneously. By inserting a mechanical shutter, an A / O modulation element, an E / O modulation element, or the like as a Q switch and controlling the Q value of the resonator, several tens nanoseconds to
Pulse light having a time width of several hundred nanoseconds can be generated.

The above-mentioned invisible pattern is formed on the reflection layer 2 accompanied by the hologram forming layer 3, and the portion of the reflection layer 2 irradiated with the laser beam is removed by melting or evaporating. The laser light is used to arrange a set of micropores generated by the laser beam, or a microarea generated by the reflectance of the light irradiated on the portion irradiated with the laser beam being different from the surroundings in a desired pattern at a predetermined density. Irradiation. It is preferable that one or several of these fine holes or fine areas collectively form a halftone dot or a line, and these halftone dots or a line form a pattern.

As an invisible information recording material 1 of the present invention, a discriminator capable of forming a moire pattern by overlapping with a pattern formed on a label or a transfer sheet using the same may be made of a suitable material such as glass or plastic film. It is preferable to use a transparent sheet on which a predetermined pattern is formed by various methods.

As a method of forming the pattern of the discriminating tool, a method of forming interference fringes as irregularities on the resin layer by the same method as the hologram other than the printing method, or a method of forming a pattern on the resist on the substrate based on information of the computer hologram. Methods such as copying from a hologram prototype obtained by electron beam exposure and development can be used, and these methods may be appropriately combined.

The above-described method of forming a pattern on the discriminator can be used as a method of forming a pattern on the invisible information recording material 1 of the present invention and a label or transfer sheet using the same. In these methods other than the method using laser irradiation, recording of individual information is impossible in view of efficiency, but can be used for forming a pattern of common information (= fixed information).

The invisible individual information recording material 1 of the present invention, and labels and transfer sheets using the same may have patterns other than those described above.

First, the invisible individual information recording material 1 of the present invention
Has a hologram forming layer, and the hologram is generally formed by very fine irregularities corresponding to interference fringes. In the hologram, the above-mentioned invisible pattern and / or confirmation A pattern may be formed. It is preferable that these invisible patterns and confirmation patterns are common information rather than individual information. Of course, an invisible pattern and / or a confirmation pattern as common information may be formed on the reflective layer.

The invisible individual information recording material 1 of the present invention may have an invisible pattern and / or a confirmation pattern formed by printing. These invisible patterns and confirmation patterns are also different from individual information.
It is preferable to use common information.

FIG. 9 shows a state in which the invisible individual information sticking label 5 of the present invention is stuck on the back side of a wristwatch.
As shown in FIG. 9A, the label 5 has “ABCD” as the manufacturer name 34 as common information and “A1234” as the production number 35 formed by using a mask at the time of hologram formation. ing. FIG. 9B shows the confirmation pattern sheet 22 ′ on the label 5.
In this figure, “X9876” can be visually recognized as the moiré pattern 23 in addition to the manufacturer name 34 and the production number 35 as common information. Here, it is assumed that the moiré pattern 23 is an individual number for each wristwatch.

As can be seen from this example,
"ABCD" of manufacturer name 34 and production number 3
Since “A1234” of No. 5 can be visually recognized, even a person having an illegal intention should pay attention to this point. However, even if the hologram including the manufacturer name 34 and the manufacturing number 35 can be forged, the moiré pattern 23 does not occur when the confirmation pattern is held over the hologram, so that it can be immediately determined that the hologram is forged. . Also, if the label 5 is successfully peeled off and affixed to the back of a fake wristwatch, regardless of the intention, the label 5 itself is genuine. Can be determined to be a fake if it can be collated by correspondence of a number or the like imprinted inside the machine.

Application of the invisible individual information recording material 1 of the present invention, and labels and transfer sheets using the same can be performed using articles of various genres as adherends as exemplified below.

An ID (identity confirmation) card, for example, a savings card at a bank or the like, a credit card, an identification card (student ID card or employee ID card), an examination card not in card form but for ID, a passport, etc. Cash vouchers such as banknotes, gift certificates, stock certificates, or securities. Various licenses such as driver's licenses, card-type certificates, such as those showing security, sanitary qualifications or grades such as fire protection, disinfection or fire protection. lottery,
Horse race voting tickets, car tickets, etc. High-end products such as luxury watches, jewelry, precious metals, antiques, etc., world-famous high-end products called so-called branded products, or packaging containers such as boxes, cases or bags for storing them. Duplicates in which software such as music software, video software, computer software, or game software is stored in a recording medium such as a magnetic recording medium or an optical recording medium, a box that stores them, or a packaging container such as a case .

[0068]

According to the first aspect of the present invention, the hologram has a characteristic appearance and difficulties in manufacturing, and individual invisible information is invisible by laser irradiation or the like with the reflective layer of the hologram being recorded. , The information is invisible in a normal state, but can be seen by moiré generated between the confirmation pattern, and therefore, even if the appearance is faithfully reproduced, it is illegal. It is possible to easily provide an invisible individual information recording material in which it is difficult to analyze the invisible information because it is easily distinguishable from the hologram. Claim 2
According to the invention of claim 1, in addition to the effect of the invention of claim 1, since the confirmation pattern and the hidden pattern are constituted by halftone dots or lines, the existence of the pattern can be understood as compared with the irregular pattern. An invisible individual information recording material which is difficult to provide can be provided. According to the third aspect of the present invention, the invisible individual information recording material of the first or second aspect of the present invention has a structure in which a transparent base material is provided on the upper surface and an adhesive layer is provided on the lower surface. It is possible to provide a label for sticking invisible individual information, which is easy to apply to. According to the fourth aspect of the present invention, the invisible individual information recording material of the first or second aspect of the invention has a structure in which a transparent base material is provided on the upper surface and a heat-sensitive adhesive layer is provided on the lower surface. An invisible individual information sticking label which can be easily applied to a body by a hot press or the like can be provided. According to the fifth aspect of the present invention, the invisible individual information recording material of the first or second aspect of the invention has a structure in which a releasable support sheet is provided on an upper surface and an adhesive layer is provided on a lower surface. It is easy to apply to the kimono, and after applying, if you try to peel off,
It is possible to provide a brittle label for sticking invisible individual information, in which the hologram forming layer is easily broken. According to the sixth aspect of the present invention, the invisible individual information recording material of the first or second aspect of the present invention has a structure in which a releasable support sheet is provided on the upper surface and a heat-sensitive adhesive layer is provided on the lower surface. Provides an invisible individual information transfer sheet that is easy to apply to adherends and is reinforced by the bottommost heat-sensitive adhesive layer even if it is to be peeled off after application, and can be firmly adhered. can do.

[Brief description of the drawings]

FIG. 1 is a diagram showing an invisible individual information recording material of the present invention.

FIG. 2 is a diagram showing a label for pasting invisible individual information according to the present invention.

FIG. 3 is a view showing a brittle label for attaching invisible individual information according to the present invention.

FIG. 4 is a view showing an invisible individual information transfer sheet of the present invention.

FIG. 5 is a diagram showing an invisible pattern and a confirmation pattern.

FIG. 6 is a diagram illustrating a moire pattern generated from an invisible pattern and a confirmation pattern.

FIG. 7 is a diagram showing an invisible pattern composed of halftone dots, a confirmation pattern composed of parallel lines, and a moiré pattern.

FIG. 8 is a diagram showing an example in which the direction of a line of a confirmation pattern is changed.

FIG. 9 is a diagram showing an application example of a label for pasting invisible individual information to a wristwatch.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Invisible individual information recording material 2 Reflective layer 3 Hologram forming layer 4 Invisible individual information 5 Invisible individual information sticking label 6 Transparent substrate 7 Adhesive layer or heat-sensitive adhesive layer 8 Invisible individual information sticking brittle label 9 Support sheet 10 Release layer 11 Invisible individual information transfer sheet 21, 31 Invisible pattern 22, 32 Confirmation pattern 23, 33 Moiré pattern

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) G09F 3/03 G09F 3/10 C 3/10 19/12 H 19/12 G06K 19/00 D

Claims (6)

[Claims] At least a hologram forming layer and a reflection layer are laminated, and the reflection layer is formed of a set of micro holes or micro areas having different reflectances from the surroundings. An invisible individual information recording material, characterized in that invisible individual information is formed by an invisible pattern that can form the following. 2. The invisible individual information recording material according to claim 1, wherein the invisible pattern, or the confirmation pattern and the invisible pattern are formed by halftone dots or lines. 3. The hologram-forming layer of the invisible individual information recording material according to claim 1 or 2 is laminated on a lower surface of a transparent substrate sheet, facing the transparent substrate side. An invisible individual information sticking label, wherein an adhesive layer is laminated on a lower surface of the reflection layer of the invisible individual information recording material. 4. The hologram forming layer of the invisible individual information recording material according to claim 1 or 2 is laminated on a lower surface of a transparent substrate sheet, facing the transparent substrate side. A label for attaching invisible individual information, wherein a heat-sensitive adhesive layer is laminated on a lower surface of the reflection layer of the invisible individual information recording material. 5. The hologram forming layer of the invisible individual information recording material according to claim 1 or 2 is laminated on a peelable surface on a lower surface of the peelable support sheet facing the support sheet. A brittle label for sticking invisible individual information, wherein an adhesive layer is laminated on a lower surface of the reflection layer of the invisible individual information recording material. 6. The hologram-forming layer of the invisible individual information recording material according to claim 1 or 2 is laminated on a peelable surface on a lower surface of the support sheet so as to face the support sheet. And an invisible individual information transfer sheet, wherein a heat-sensitive adhesive layer is laminated on a lower surface of the reflection layer of the invisible individual information recording material.