JP2014092646A - Forgery preventive structure, and label, transfer foil, and forgery preventive sheet having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a forgery preventive structure in which a hue variable hologram can be visually observed and authenticity can be also determined by mechanical reading, and to provide a label, a transfer foil, a transfer object, and a forgery preventive sheet having the above structure.SOLUTION: A forgery preventive structure 10 includes at least an infrared-excitation infrared light-emitting layer 12, a hue variable layer 25 disposed in contact with and covering the infrared-excitation infrared light-emitting layer 12, a hologram layer 15 and a reflection layer 17, and is characterized in that: the infrared-excitation infrared light-emitting layer 12 emits light in an infrared wavelength region when irradiated with excitation light in an infrared wavelength region; the hue variable layer 25 includes a pearl pigment or a cholesteric liquid crystal; the hologram layer 15 is a relief hologram comprising a fine concavo-convex pattern; and the reflection layer 17 is a metal reflection layer or a transparent reflection layer.

Description

  The present invention relates to an anti-counterfeit structure capable of determining authenticity by visual inspection and machine reading. More specifically, the present invention relates to a material in which emitted light when irradiated with excitation light in the infrared wavelength region is emitted light in the infrared wavelength region. A color variable layer provided so as to be in contact with and covering the infrared excitation infrared emission layer, and a hologram layer and the hologram layer A forgery-preventing structure including a reflective layer; the forgery-preventing structure can be visually observed as a color variable hologram; and the infrared excitation infrared light-emitting layer is machine-readable, and the forgery can be determined by the machine reading The present invention relates to a prevention structure and a label having the prevention structure, a transfer foil, a transfer object, and a forgery prevention sheet.

  In the present specification, “ratio”, “part”, “%” and the like indicating the composition are based on mass unless otherwise specified, and the “/” mark indicates that they are integrally laminated. “PET” is an abbreviation, functional expression, common name, or industry term for “polyethylene terephthalate”, “UV” for “ultraviolet rays”, and “IR” for “infrared rays”.

  (Background Art) Conventionally, the anti-counterfeiting method has a copy-preventing image line, a hologram, an optically variable material, a latent image pattern and the like that are difficult to be copied or copied, and a visual observation such as a coloring pattern or a watermark is easy. And tactile sensations such as unevenness and texture. In addition, when judging the authenticity of labels and printed matter affixed to products, print a mark for authentication with a material that emits ultraviolet light, and determine it visually by irradiating an ultraviolet lamp, or absorb infrared light A true / false determination method using light, in which a machine reading code or the like is printed with a material to be used and machine determination is performed by irradiating infrared rays, is often used. However, in recent years, it has become relatively easy to obtain fluorescent materials and infrared light absorbing materials, and even if these materials are used as anti-counterfeiting and anti-counterfeiting means, Obtaining a light source, illuminating, verifying, and forging labels and prints has become less difficult.

  (Prior art) Conventionally, a forgery-preventing printed material is an image for verification consisting of an infrared-absorbing ink having an absorption peak in the infrared region on an infrared reflective substrate, and excitation light having an excitation peak in the infrared region. It is provided with a verification image made of fluorescent ink that is excited by irradiation and emits infrared light longer than the excitation peak wavelength of the excitation light, and further concealed so as to conceal these verification images An anti-counterfeit printed matter is known in which an image is provided and the absorption peak wavelength of the infrared absorbing ink is the same as the excitation peak wavelength of the fluorescent ink (see, for example, Patent Document 1). . Moreover, it is a forgery-preventing printed matter having a substrate and a colored pattern printing layer provided on the substrate, and the colored pattern printing layer contains an invisible security material that reacts to infrared rays and / or ultraviolet rays. A forgery-preventing printed matter characterized by the above is known (for example, see Patent Document 2). Furthermore, at least a part of the color variable printing layer is provided on the medium base material, the color variable printing layer provided on the medium base material, the color changing visible depending on the viewing angle, and the color variable printing layer. An anti-counterfeit printing medium provided with a photoreactive printing layer provided so as to be exposed, formed in the same color as the medium substrate, and emitting fluorescence by irradiation with light having a specific wavelength is known ( For example, see Patent Document 3.) Furthermore, the printed matter has an information region for authenticity determination at least partially, and the information region for authenticity determination is irradiated with light in a visible light wavelength region and an infrared light wavelength region. There is known a printed matter for authentication characterized in that information for emitting infrared light is formed by (see, for example, Patent Document 4). However, although all of Patent Documents 1 to 4 can make true / false judgments by machine reading, it makes it difficult to see information that can be read by machines visually, and cannot make true / false judgments by visual observation. There is a drawback that true / false judgments cannot be made. Further, Patent Documents 2 to 4 are disclosures by the present applicant, and the present invention has been completed in order to eliminate these drawbacks and enable true / false judgments by both machine reading and visual observation. Is.

JP 2007-144844 A JP 2007-261112 A JP 2008-162184 A JP 2007-136838 A

  Therefore, the anti-counterfeit structure and the label, transfer foil, transferred object, and anti-counterfeit sheet having the anti-counterfeit structure can be visually observed as the color-variable hologram, and the infrared excitation infrared light emitting layer is a machine. There is a demand for authenticity determination by reading. In order to solve the above-described problems, the present inventors have made extensive studies and have completed the present invention. An object of the present invention is to provide a forgery prevention structure capable of performing authenticity determination by both machine reading and visual observation, and a label, a transfer foil, a transferred object, and a forgery prevention sheet having the structure.

  In order to solve the above problems, the forgery prevention structure according to the invention of claim 1 of the present invention is at least in contact with the infrared excitation infrared emission layer and the infrared excitation infrared emission layer, and An anti-counterfeit structure including a color variable layer provided so as to cover the infrared light emitting layer, and a hologram layer and a reflective layer in contact with the hologram layer, wherein the infrared excitation infrared light emitting layer is excitation light in an infrared wavelength region. Is a layer containing a pearl pigment or a cholesteric liquid crystal whose color changes depending on the viewing angle of the color variable layer, and the reflective layer of the hologram layer. A relief hologram composed of fine irregularities, the reflection layer is a metal reflection layer or a transparent reflection layer, the forgery prevention structure is visible as a color variable hologram, and the infrared excitation infrared emission layer is a mechanical Reading A forgery prevention structure characterized in that it is taken. A label having an anti-counterfeit structure according to the invention of claim 2 is characterized in that the anti-counterfeit structure according to claim 1 and an adhesive layer are provided in this order on one surface of the base material and the base material. It is a label having a forgery prevention structure. A transfer foil having an anti-counterfeit structure according to the invention of claim 3 is provided with a transfer substrate, a release layer on one surface of the transfer substrate, and the anti-counterfeit structure and adhesive layer of claim 1 in this order. A transfer foil having an anti-counterfeit structure. A to-be-transferred body having a forgery prevention structure according to the invention of claim 4 uses the transfer foil having the forgery prevention structure according to claim 3 to transfer the forgery prevention structure and the adhesive layer to the transfer body. It is a to-be-transferred body which has the forgery prevention structure characterized by becoming. An anti-counterfeit paper having an anti-counterfeit structure according to the invention of claim 5 is an anti-counterfeit paper having an anti-counterfeit structure characterized in that the anti-counterfeit structure according to claim 1 is formed on a base paper. is there.

  According to the first aspect of the present invention, it is possible to determine whether the infrared excitation infrared light emitting layer is machine-ready and whether the color-variable hologram is visually checked. An anti-counterfeit structure that provides an effect that can be determined is provided. According to the second aspect of the present invention, it is possible to determine whether the infrared excitation infrared light emitting layer is mechanically read, and whether the color variable hologram is visually checked. Provided is a label having an anti-counterfeit structure that has the effect of being able to be determined. According to the third aspect of the present invention, the true / false determination by mechanical reading of the infrared excitation infrared light emitting layer and the true / false determination by visual observation of the color variable hologram can be performed. Provided is a transfer foil having an anti-counterfeit structure that has the effect of being able to be determined. According to the fourth aspect of the present invention, the true / false determination by mechanical reading of the infrared excitation infrared light emitting layer and the true / false determination by visual observation of the color variable hologram can be made by both mechanical reading and visual inspection. Provided is a transferred object having an anti-counterfeit structure that has the effect of being able to be determined. According to the fifth aspect of the present invention, it is possible to determine whether the infrared excitation infrared light emitting layer is mechanically read or not, and whether the color variable hologram is visually checked. Provided is an anti-counterfeit paper having an anti-counterfeit structure that has an effect that can be determined.

It is sectional drawing of the forgery prevention structure which shows one Example of this invention. It is sectional drawing of the label which has the forgery prevention structure which shows one Example of this invention. It is sectional drawing of the label which has the forgery prevention structure which shows one Example of this invention. It is sectional drawing of the transfer foil which has the forgery prevention structure which shows one Example of this invention. It is sectional drawing of the thread | sled which has the forgery prevention structure which shows one Example of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  (Anti-Counterfeit Structure) As shown in FIG. 1, the anti-counterfeit structure 10 of the present invention is in contact with at least the infrared excitation infrared emission layer 12 and the infrared excitation infrared emission layer 12 and the infrared excitation red emission layer. A color variable layer 25 provided so as to cover the outer light emitting layer 12; a hologram layer 15; and a reflective layer 17 in contact with the hologram layer 15. The infrared excited infrared light emitting layer 12 is excited in the infrared wavelength region. The emitted light when irradiated with light is emitted light in the infrared wavelength region, and is a layer containing a pearl pigment or cholesteric liquid crystal whose color changes depending on the viewing angle of the color variable layer, The surface of the reflective layer 17 is a relief hologram having fine irregularities, the reflective layer 17 is a metal reflective layer or a transparent reflective layer, the anti-counterfeit structure 10 is visible as a color variable hologram, and the infrared Okoshiaka outside the light-emitting layer 12 is characterized in that it is a machine-readable.

  (Operation / Effect) According to the anti-counterfeit structure 10 of the present invention, authenticity determination by mechanical reading of the infrared excitation infrared emission layer 12, and the color that can be seen by the viewing angle by the color variable layer 25 and the hologram layer 15 are shown. The true / false judgment by visual observation of the color variable hologram in which the color changes can produce an effect that the true / false judgment can be performed both by machine reading and by visual observation. Further, by observing the color variable hologram whose color changes depending on the viewing angle, there is also a hidden effect that it is difficult to visually recognize the presence of the infrared excitation infrared light emitting layer 12 for machine reading.

  (Infrared excitation infrared emission layer) As the infrared excitation infrared emission layer 12, at least infrared emission red when emitted light when irradiated with excitation light in the infrared wavelength region is emitted light in the infrared wavelength region. An external light-emitting agent and a binder are included. In addition, additives such as a filler, a plasticizer, a colorant, and an antistatic agent may be added as necessary within a range that does not affect the irradiation of excitation light and the emission of emitted light.

  (Binder) As the binder, conventionally known thermoplastic resins, thermosetting resins, reactive resins, electron beam curable resins, ultraviolet curable resins, visible light curable resins, and mixtures thereof are used. Examples of the thermoplastic resin include vinyl chloride copolymers, acrylic acid or methacrylic acid resins, urethane resins, polyamide resins, cellulose derivatives, polyester resins, polycarbonate resins, and the like, and mixtures thereof. used. Specific examples of the thermosetting resin or reactive resin include epoxy resins, polyurethane resins, polyester resins, and acrylic reaction resins (ionizing radiation curable resins).

(Infrared excited infrared luminescent agent) The infrared excited infrared luminescent agent may be any one that is excited by infrared light (800 nm) and emits light at a longer wavelength (980 to 1020 nm). For example, LiNd _0.9 Yb _0.1 P ₄ O ₁₂ , LiBi _0.2 Nd _0.7 Yb _0.1 P ₄ O ₁₂ , Nd _0.9 Yb _0.1 Nd ₅ (MoO ₄ ) ₄ , NaNd _0.9 Yb _0.1 P ₄ O ₁₂ , Nd _0.8 Yb _0.2 Na ₅ (WO ₄ ) ₄ Nd _0.8 Yb _0.2 Na ₅ (Mo _0.5 W _0.5 O ₄ ) ₄ , Ce _0.05 Gd _0.05 Nd _0.75 Yb _0.15 Na ₅ (W _0.7 Mo _0.3 O ₄ ) ₄ , Nd _0.9 Yb _0.1 Al ₃ (BO ₃ ) ₄ , Nd Examples include _0.9 Yb _0.1 Al _2.7 Cr _0.3 (BO ₃ ) ₄ , Nd _0.6 Yb _0.4 P ₅ O ₁₄ , Nd _0.8 Yb _0.2 K ₃ (PO ₄ ) _{2 and the} like. Specifically, fluorescent pigment IRS-F (manufactured by Nemoto Special Chemical Co., Ltd.) can be exemplified.

  (Color variable layer) The color variable layer 25 is an ink including at least a binder and a color variable agent, that is, a layer including a pearl pigment or a cholesteric liquid crystal as the color variable agent, and a color change layer whose color changes depending on the viewing angle. It becomes.

(Pearl pigment)
The pearl pigment ink whose color changes includes a pigment that multi-reflects light, and the color appears to change due to interference of light reflected by the pigment. The color variable ink provided using the pearl pigment ink, for example, has a layer of high refractive index silicon oxide, titanium oxide, iron oxide, etc. and a layer of low refractive index mica, etc., laminated in a transparent vehicle. Those in which pigments are dispersed and those containing coated glass or liquid crystal can also be used. The color variable layer 25 of the present invention is a layer containing a pearl pigment whose visible color changes depending on the viewing angle. Specific examples include a product name manufactured by Shiseido; an infinite color, a product name manufactured by Merck Ltd. (Germany), and a pearl ink such as Iriodin.

  (Cholesteric liquid crystals) Cholesteric liquid crystals include cholesterol halides, monocarboxylic acid cholesterol esters, monocarboxylic acid sitosterol esters, benzoic acid derivative cholestanol esters, dibasic acid dicholesteryl esters, main-chain liquid crystal polymer compounds, side Examples thereof include a chain type liquid crystal polymer compound and a rigid main chain type liquid crystal polymer compound.

More specifically, for example, cholesteryl chloride, cholesteryl acetate, cholesteryl nonanoate, methyl carbonate, ethyl cholesterol, cholesteryl p-methoxybenzoate, sitosteroyl benzoate, sitosteroyl p-methyl benzoate, cholestanyl benzoate, 10, 12- Docosadiin dicarboxylic acid dicholesteryl ester, 8,12-eicosadicarboxylic acid dicholesteryl ester, 10,12-pentacosadiin dicarboxylic acid dicholesteryl ester, dodecadicarboxylic acid dicholesteryl ester, 12,14-hexacosadiin dicarboxylic acid Dicholesteryl ester, 4- (7-cholesteryloxycarbonylheptyloxy) phenoxyoctanoic acid cholesteryl ester, L-glu Min acid -γ- benzyl / L-glutamate -γ- dodecyl copolymers and the like.
Further, cholesteryl formate, cholesteryl acetate, cholesteryl propionate, cholesteryl butyrate, cholesteryl pentanate, cholesteryl hexanate, cholesteryl heptanoate, cholesteryl octanate, cholesteryl nonanoate, cholesteryl decanate, cholesteryl decanate (cholesteryl laurate) Cholesteryl myristate, cholesteryl palmitate, cholesteryl stearate, cholesteryl oleate, cholesteryl oleyl carbonate, cholesteryl linoleate, cholesteryl 12-hydroxystearate, cholesteryl mercaptan, cholesterol chloride, cholesteryl fluoride, cholesteryl bromide, cholesteryl iodide, etc. Can be mentioned.

    Preferably, a mixture of three kinds of alkyl cholesterol (for example, cholesterol nanoate) and cholesteryl halide (for example, cholesterol chloride) cholesteryl oleyl carbonate is used, and these three types of liquid crystals are used so as to be used at room temperature. Is common. In addition, it is not limited to the compound shown here, Moreover, these cholesteric liquid crystal compounds can be used 1 type or in mixture of 2 or more types.

  As a liquid crystal compound in which a chiral compound is added to a nematic liquid crystal compound, 4-substituted benzoic acid 4′-substituted phenyl ester, 4-substituted cyclohexanecarboxylic acid 4′-substituted phenyl ester, 4-substituted cyclohexane Carboxylic acid 4′-substituted biphenyl ester, 4- (4-substituted cyclohexanecarbonyloxy) benzoic acid 4′-substituted phenyl ester, 4- (4-substituted cyclohexyl) benzoic acid 4′-substituted phenyl ester, 4- (4- Substituted cyclohexyl) benzoic acid 4'-substituted cyclohexyl ester, 4-substituted 4'-substituted biphenyl, 4-substituted phenyl 4'-substituted cyclohexane, 4'-substituted cyclohexane, 2- (4-substituted phenyl) -5-substituted pyridine Etc. are used.

  Particularly preferably, a liquid crystal compound having a cyano group or a fluorine atom at least at one end of the molecule is used, and various suitable chiral agents are added to these liquid crystal compounds. As the chiral compound, “CB-15”, “C-15” (manufactured by BDH), “CM-21”, “CM-22”, “CM-19”, “CM-20”, “CM” (Above, manufactured by Chisso Corporation), "S1082", "S-811", "R-811" (above, manufactured by Merck & Co., Inc.), and the like. Furthermore, a three-dimensionally crosslinkable liquid crystalline polymerizable monomer molecule or polymerizable oligomer molecule can be used. A layer containing cholesteric liquid crystal molecules can be obtained by adding an arbitrary chiral agent to a predetermined polymerizable monomer molecule or polymerizable oligomer molecule.

  The cholesteric liquid crystal has light selective reflectivity that reflects either left circularly polarized light or right circularly polarized light with respect to incident light from the observation side. Also, by applying these in combination, the determination method can be complicated, and a more sophisticated authenticity identifier can be obtained.

  Further, since the color variable layer 25 printed with ink containing liquid crystal uses expensive liquid crystal, its use is limited. Therefore, the color variable layer 25 using color variable ink not containing liquid crystal is preferable.

  (Binder) As the binder of the color variable layer 25, the same binder as that of the infrared excitation infrared light emitting layer 12 can be used even when a pearl pigment or a cholesteric liquid crystal is included. When a liquid crystal polymerizable monomer molecule or polymerizable oligomer molecule capable of three-dimensional crosslinking is used, a polymer of the polymerizable monomer molecule or polymerizable oligomer molecule may be used as a binder.

  (Color Variable Hologram) The color variable hologram can be a hologram in which the hologram layer 15 / reflection layer 17 is laminated in addition to the color variable layer 25, and the color of the hologram changes depending on the viewing angle. Further, conventionally, in order to observe a bright hologram, the background color was limited to metallic luster or black, but due to the effect of the color variable layer 25, it is no longer limited to metallic luster or black background color, A bright hologram can be observed regardless of the background. The hologram is remarkably excellent in design and / or security. In addition, the manufacturing process can be performed by a printing method using existing equipment except for the reflective layer 17 formed of a thin film by a vacuum film forming apparatus, can be produced in a small lot, and can be produced at low cost.

  The color variable layer 25 is formed of a color variable ink in which a pigment in which a high refractive index layer and a low refractive index layer are laminated in a transparent medium is dispersed. Incident light is reflected by the pigment and emitted in the first angle α direction, and after passing through the pigment with a high refractive index, is reflected by the surface of the medium substrate and emitted in the second angle β direction. The relationship between the reflected light and the transmitted light of a pigment has the following combination, depending on the thickness of the pigment, any wavelength of visible light interferes. When the pigment thickness is about 60 nm, the reflected light is silver and the transmitted light is transparent. When the pigment thickness is about 90 nm, the reflected light is gold and the transmitted light is purple. When the pigment thickness is about 115 nm, the reflected light is red and transmitted. When the light is about 128 nm, the reflected light is purple and the transmitted light is yellow. When the light is about 143 nm, the reflected light is blue, and the transmitted light is orange. When the light is about 170 nm, the reflected light is green. The transmitted light is red. Therefore, for example, when the color variable layer 25 appears golden at the first angle α, it appears purple at the second angle β.

  The color change effect of the color variable layer 25 is such that the greater the amount of light reflected by the pigment, the greater the color change effect. Therefore, the thickness is preferably as thick as possible so that the number of pigments that multiple reflection of light is increased. About 2 to 15 μm is preferable. Accordingly, the printing method of the color variable layer 25 is not particularly limited, but known offset printing, gravure printing, or the like may be used, but a screen printing method capable of increasing the thickness of the color variable ink printing layer is preferable.

  Since the color variable layer 25 is a printing method, the design may be solid or partial, and all the designs such as letters, numbers, symbols, illustrations, patterns, photos, etc. can be used. If the layer 15 has a holographic design, the design effect is further enhanced by providing the chromatic design in the color variable hologram 25 by providing them in synchronization with the printed design of the color variable layer 25.

  (Hologram Layer) The hologram layer 15 is formed with a relief hologram made of fine irregularities on the surface of the reflection layer 17 of the hologram layer 15. The hologram layer 15 is a layer formed by curing a composition containing the following ionizing radiation curable resin with ionizing radiation.

  (Ionizing radiation curable resin) The ionizing radiation curable resin is (i) an isocyanate having three or more isocyanate groups in the molecule, (b) at least one hydroxyl group and at least two (meth) acryloyloxy groups in the molecule. Polyurethane (meth) acrylates which are polyfunctional (meth) acrylates having a number of units, or (c) urethane (meth) acrylate oligomers which are reaction products of polyhydric alcohols having at least two hydroxyl groups in the molecule, and are urethane-modified acrylates having ionizing radiation curability. Resin. As a preferable urethane (meth) acrylate oligomer, a photocurable resin disclosed in detail in JP-A No. 2001-329031 is preferable. Specific examples include MHX405 varnish (made by The Inktec Co., Ltd., ionizing radiation curable resin product name) and Iupimer UV · V3031 (manufactured by Mitsubishi Chemical Co., Ltd., product name of ionizing radiation curable resin).

  (Hologram layer formation) The hologram layer 15 is formed by adding the above-mentioned ionizing radiation curable resin and, if necessary, a photopolymerization initiator, a plasticizer, a stabilizer, a surfactant, etc., and dispersing or dissolving in a solvent. Then, after applying a relief by a known coating method such as roll coating, gravure coating, comma coating, and die coating, and shaping a relief, it may be reacted (cured) with ionizing radiation. The thickness of the hologram layer 15 is usually about 1 μm to 30 μm, preferably about 2 μm to 20 μm. It may be applied several times.

  (Relief Hologram) Next, on the surface of the hologram layer 15, a predetermined relief structure such as a hologram that exhibits a light diffraction effect is formed and cured. A hologram is a recording of interference fringes due to the interference of light between object light and reference light in an uneven relief shape, such as a laser reproduction hologram such as a Fresnel hologram, a white light reproduction hologram such as a rainbow hologram, There are color holograms utilizing the above principle, computer generated holograms (CGH), holographic diffraction gratings and the like. The relief shape is a concavo-convex shape, and is not particularly limited, and may have a fine concavo-convex shape such as light diffusion, light scattering, light reflection, light diffraction, etc., such as Fourier transform or lenticular lens. , A light diffraction pattern, and a moth eye. Further, although it does not have a light diffraction function, it may be a hairline pattern, a mat pattern, a line pattern, an interference pattern, or the like that expresses a unique glitter.

  As a method for producing these relief shapes, in addition to holograms and diffraction gratings produced using hologram photographing and recording means, holograms produced using an electron beam drawing device based on optical calculations such as interference and diffraction, A diffraction grating can also be mentioned. Also, a relatively large pattern such as a hairline pattern or a line pattern may be a machine cutting method. These holograms and / or diffraction gratings may be recorded single or multiple, or may be recorded in combination. These original plates can be prepared by known materials and methods, and usually, laser beam interference using a glass plate coated with a photosensitive material, using an electron beam drawing apparatus on a glass plate coated with an electron beam resist material. An electron beam drawing method for patterning can be applied.

  (Relief shaping) The relief shape is shaped (also referred to as replication) on the surface of the hologram layer 15. Hologram shaping can be formed by a known method. For example, when recording diffraction gratings or interference fringes of holograms as reliefs of surface irregularities, a master on which the diffraction gratings or interference fringes are recorded in irregularities is pressed. The concave / convex pattern of the original can be duplicated by using it as a mold (referred to as a stamper) and by superimposing the original on the resin layer and heat-pressing both of them with an appropriate means such as a heating roll.

  (Relief Curing) The hologram layer 15 is irradiated with ionizing radiation during or after embossing with a stamper to cure the ionizing radiation curable resin. The ionizing radiation curable resin becomes an ionizing radiation curable resin (hologram layer 15) when cured (reacted) by irradiation with ionizing radiation after the relief is formed. The ionizing radiation may be classified according to the quantum energy of the electromagnetic wave, but in this specification, all ultraviolet rays (UV-A, UV-B, UV-C), visible light, gamma rays, X-rays, electrons It is defined as including a line. Accordingly, ultraviolet (UV), visible light, gamma rays, X-rays, or electron beams can be applied as ionizing radiation, but ultraviolet (UV) is preferred. An ionizing radiation curable resin that is cured by ionizing radiation may contain a photopolymerization initiator and / or a photopolymerization accelerator in the case of ultraviolet curing, and may not be added in the case of high energy electron beam curing. Can be cured even with thermal energy.

  (Relief pattern) The pattern of the hologram layer 15 is preferably a quasi-continuous pattern. When creating a press mold (referred to as a stamper) for the pseudo continuous pattern, it is only necessary to match a plurality of small relief plates with high accuracy to make the joints inconspicuous, or to fill the joints with resin. In this way, by using a quasi-continuous pattern, the area can be as large as possible, or preferably the entire surface. Further unique design can be improved by synchronizing or matching with any other printed pattern against a large area or entire surface of the hologram pattern.

  (Reflection layer) Since the reflection layer 17 is provided on the reflection layer 17 on the relief surface of the hologram layer 15 provided with a predetermined relief structure, the reflection reflection and / or diffraction effect is enhanced. If a rate is higher, it will not specifically limit. The reflective layer 17 may be a metallic glossy reflective layer such as a metal thin film by a vacuum thin film method or a transparent reflective layer.

  (Metal reflection layer) The metal used for the reflection layer 17 is a metal element thin film that has a metallic luster and reflects light, such as Cr, Ni, Ag, Au, Al, etc., and their oxides, sulfides, Thin films such as nitrides may be used alone or in combination. The light-reflective metal thin film can be formed by a vacuum thin film method such as a vacuum deposition method, a sputtering method, or an ion plating method so as to have a thickness of about 10 nm to 2000 nm, preferably 20 nm to 1000 nm. However, it can also be formed by plating. If the thickness of the reflective layer 17 is less than this range, the light is transmitted to some extent and the effect is reduced, and if it is more than that, the reflective effect is not changed, which is wasteful in cost.

  (Transparent Reflective Layer) Since the transparent reflective layer used for the reflective layer 17 is provided on the transparent reflective layer on the relief surface of the hologram layer 15 provided with a predetermined relief structure, the relief reflection and / or diffraction effect is enhanced. Because it has almost colorless and transparent hue and its optical refractive index is different from that of the hologram layer, it is possible to visually recognize the glitter of the hologram, etc., even though there is no metallic luster, so that a transparent hologram is produced. Can do.

  In addition to the color variable layer 25, a transparent hologram layer 15 / transparent reflection layer 17 are laminated to form a color variable transparent hologram in which the color of the transparent hologram changes depending on the viewing angle, and the true / false judgment by visual inspection becomes more reliable. , Security is also improved. In addition, the presence of the infrared excitation infrared emission layer 12 can be made difficult to understand due to the blinding effect of the color variable transparent hologram.

Examples of the transparent reflection layer 17 include a thin film having a higher refractive index than that of the hologram layer 15 and a thin film having a lower refractive index. Examples of the former include ZnS, TiO ₂ , Al ₂ O ₃ , and Sb _2. There are S ₃ , SiO, SnO ₂ , ITO, etc., and examples of the latter include LiF, MgF ₂ , and AlF ₃ . Preferably, it is a metal oxide or nitride, specifically, Be, Mg, Ca, Cr, Mn, Cu, Ag, Al, Sn, In, Te, Fe, Co, Zn, Ge, Pb, Cd , Bi, Se, Ga, Rb, Sb, Pb, Ni, Sr, Ba, La, Ce, Au, and other oxides or nitrides, and the like can be exemplified by a mixture of two or more thereof. Also, a general light-reflective metal thin film such as aluminum can be used when it has a thickness of 200 mm or less. The transparent metal compound is formed on the relief surface of the hologram layer 15 by vacuum such as vapor deposition, sputtering, ion plating, and CVD so that the thickness of the relief layer of the hologram layer 15 is about 10 to 2000 nm, preferably 20 to 1000 nm. It may be provided by a thin film method or the like.

(Machine reading) For machine reading, from an infrared irradiation device, if necessary, through a half mirror, a label having a forgery prevention structure, a transfer foil having a forgery prevention structure, a transferred object having a transferred forgery prevention structure, To the forgery prevention structure 10 of the forgery prevention paper having the forgery prevention structure,
What is necessary is just to irradiate the infrared of the specific wavelength approximated to the excitation wavelength of the infrared excitation infrared luminescent agent contained in the infrared excitation infrared luminescent layer 12, and to detect the emission wavelength of an infrared excitation infrared luminescent agent in an infrared light receiving sensor. In the anti-counterfeit structure 10, since a color variable hologram whose color changes depending on the viewing angle is observed by visual observation, the presence of the infrared excitation infrared light emitting layer 12 for machine reading is difficult to visually determine. However, the emitted light obtained by irradiating the anti-counterfeit structure 10 with, for example, condensing near-infrared rays with a lens as necessary using an LED having sharp emission characteristics in the vicinity of a wavelength of 800 nm. Is photographed with an infrared camera through a bandpass filter having a transmission characteristic around 950 nm, the infrared excitation infrared light emitting layer 12 is photographed in white and the other part is photographed in black, so that information can be read.

  In addition, as a method for reading infrared light emission, line or surface reading may be used. In surface reading, the light emitted from the light emitting light source illuminates the face of the bill, and the phototransistor of the light receiving unit can be read on the surface like a CCD incorporated in a digital camera. In this case, if the infrared excitation infrared emission layer 12 is a number or a barcode, the information can also be read. In reading on the line, for example, if the gift certificate having the forgery prevention structure 10 is read by the reading device and the gift certificate is moved, the light emitting unit can be read. Specifically, for example, when a gift certificate is used at a department store or the like, the infrared excitation infrared emission layer 12 is irradiated with infrared light (about 800 nm to 900 nm) (irradiation process). When a character string ("XX department store" and "¥ 1,000", for example) formed by the infrared excitation infrared light emitting layer 12 is irradiated with infrared light, the gift certificate is It can be determined that it is genuine (determination step). In the case of a forged gift certificate, since the character string that should be formed in the infrared excitation infrared light emitting layer 12 does not emit infrared light, it can be easily determined to be a fake.

  (Label) As shown in FIG. 2, a base material 11 and an anti-counterfeit structure 10 and an adhesive layer 29 are provided in this order on one surface of the base material 11, and the base material 11 / infrared excited infrared light emitting layer 12 / This is an adhesive label having an anti-counterfeit structure 10 having a color variable layer 25 / hologram layer 15 / reflective layer 17 / adhesive layer 29 layer structure. According to the pressure-sensitive adhesive label, authenticity determination by mechanical reading of the infrared excitation infrared light emitting layer 12 and visual observation of a color variable hologram whose color changes depending on the viewing angle by the color variable layer 25 and the hologram layer 15. With authenticity determination, authenticity determination can be performed both by machine reading and by visual observation.

  (Substrate) As the substrate 11, various materials can be applied depending on the use as long as it is transparent or translucent. For example, polyester resins such as polyethylene terephthalate and polyethylene naphthalate, polyamide resins such as nylon 6, polyolefin resins such as polyethylene, polypropylene and polymethylpentene, vinyl resins such as polyvinyl chloride, polymethyl methacrylate, etc. Examples thereof include cellulose films such as acrylic resin, polycarbonate, cellophane, and cellulose acetate. The substrate 11 may be a copolymer resin containing these resins as a main component, a mixture (including an alloy), or a laminate including a plurality of layers. The substrate may be a stretched film or an unstretched film, but a film stretched in a uniaxial direction or a biaxial direction is preferable for the purpose of improving the strength. The substrate is used as a film, sheet or board formed of at least one layer of these resins. Prior to application, the substrate is subjected to corona discharge treatment, plasma treatment, ozone treatment, flame treatment, primer (also called an anchor coat, adhesion promoter, or easy adhesive) application treatment, pre-heat treatment, dust removal treatment. Alternatively, easy adhesion treatment such as vapor deposition treatment or alkali treatment may be performed. Moreover, you may add additives, such as a filler, a plasticizer, a coloring agent, and an antistatic agent, as needed.

  (Adhesive layer) As the adhesive layer 29, a pressure-sensitive adhesive that adheres with a known pressure sensitivity can be applied. The adhesive is not particularly limited. For example, natural rubber, synthetic rubber resin, silicone resin, acrylic resin, vinyl acetate resin, urethane resin, acrylonitrile, hydrocarbon resin, alkylphenol resin, A rosin resin is applicable.

  (Formation of adhesive layer) These resins, or a mixture thereof, can be printed, applied or dried as a latex, aqueous dispersion, or organic solvent by a known printing or coating method such as screen printing or comma coating. It ’s fine. Further, the adhesive layer 29 may be formed on a part rather than the entire surface. Moreover, the adhesive force and cohesive force of an adhesive can be suitably selected according to a use and object. If necessary, release paper (also called separate paper or separate paper) can be peeled off by having a release layer on one side of a base material such as high-quality paper, coated paper, impregnated paper, plastic film, etc. You may laminate.

  (Modification) In the adhesive label shape, as shown in FIG. 3, the substrate 11 is laminated between the infrared excitation infrared emission layer 12 and the color variable layer 25, the hologram layer 15 and the reflection layer 17. Then, the layer configuration of the infrared excitation infrared emission layer 12 / color variable layer 25 / base material 11 / hologram layer 15 / reflection layer 17 / adhesion layer 29 may be adopted. Moreover, a simple label may be used without providing the adhesive layer 29, and it may be attached to the actual product, adhered, or enclosed in a package. Also for the label, true / false determination by mechanical reading of the infrared excitation infrared emission layer 12 and true / false determination by visual observation of a color variable hologram whose color changes depending on the viewing angle by the color variable layer 25 and the hologram layer 15. Thus, it is possible to make a true / false judgment both by machine reading and by visual observation.

  (Transfer foil) As shown in FIG. 4, when a transfer base 21 and a release layer 13, an anti-counterfeit structure 10 and an adhesive layer 19 are provided in this order on one surface of the transfer base 21, the anti-counterfeit structure 10 A transfer foil having If the transfer foil is used for transfer to a transfer target, the true / false determination by mechanical reading of the infrared excitation infrared light emitting layer 12, and the color that can be seen depending on the viewing angle can be obtained by the color variable layer 25 and the hologram layer 15. By transferring the color variable hologram that changes with the naked eye, it is possible to determine the authenticity by both the mechanical reading and the visual inspection.

  (Transfer Base Material) As the transfer base material 21, various materials can be applied depending on the use as long as they have heat resistance, mechanical strength, mechanical strength to withstand manufacturing, and solvent resistance. For example, polyester resins such as polyethylene terephthalate and polyethylene naphthalate, polyamide resins such as nylon 6, polyolefin resins such as polyethylene, polypropylene and polymethylpentene, vinyl resins such as polyvinyl chloride, polymethyl methacrylate, etc. Examples include acrylic resins, polycarbonate, cellophane, and cellulose films such as cellulose acetate. Preferably, in terms of heat resistance and mechanical strength, polyethylene terephthalate is the most suitable for polyester resin films such as polyethylene terephthalate and polyethylene naphthalate. The thickness of the substrate is usually about 2.5 μm to 100 μm, but 4 μm to 50 μm is preferable in terms of transferability.

  The transfer substrate 21 may be a copolymer resin containing these resins as a main component, a mixture (including an alloy), or a laminate composed of a plurality of layers. The substrate may be a stretched film or an unstretched film, but a film stretched in a uniaxial direction or a biaxial direction is preferable for the purpose of improving the strength. The substrate is used as a film, sheet or board formed of at least one layer of these resins. Prior to application, the substrate is subjected to corona discharge treatment, plasma treatment, ozone treatment, flame treatment, primer (also called an anchor coat, adhesion promoter, or easy adhesive) application treatment, pre-heat treatment, dust removal treatment. Alternatively, easy adhesion treatment such as vapor deposition treatment or alkali treatment may be performed. Moreover, you may add additives, such as a filler, a plasticizer, a coloring agent, and an antistatic agent, as needed.

  (Peeling layer) The peeling layer 13 includes a release resin, a resin containing a release agent, and a curable resin that is cross-linked by ionizing radiation. Preferably, a melamine resin is used. By using the melamine resin, stable releasability is exhibited in combination with the hologram layer 15 described later.

  The release layer 13 is formed by dispersing or dissolving the resin in a solvent and applying it to at least one part by a printing or coating method such as roll coating, gravure coating, comma coating, play coating, etc., and drying to form a coating film. To do. Further, if necessary, it may be heat-dried or aged at a temperature of 30 ° C. to 120 ° C. The thickness of the release layer 13 is usually about 0.01 μm to 5 μm, preferably about 0.5 μm to 3 μm. The thinner the thickness is, the better. However, when the thickness is 0.1 μm or more, better film formation is obtained and the peeling force is stabilized.

  (Adhesive layer) As the adhesive layer 19, a heat-sensitive adhesive which melts or softens when heated and exhibits an adhesive effect can be applied. Specifically, polyolefin resin, vinyl chloride resin, vinyl acetate Examples thereof include resins, vinyl chloride vinyl acetate copolymer resins, acrylic resins, polyester resins, and the like. The adhesive layer 19 preferably contains a filler such as microsilica in terms of the ability to break the foil. Further, the resin of the adhesive layer 19 is preferably one having a melting point of 60 to 95 ° C. which melts and adheres at a low temperature of about 95 ° C. and solidifies and adheres at about 60 ° C. When the melting point is less than the above range, the adhesion to the support is insufficient, and the temperature at which the formed image is used is limited. On the other hand, if the melting point exceeds the above range, the transferability becomes insufficient by heating with a thermal head, the foil breakability of the hard coat layer is lowered, and transfer with good resolution becomes difficult. The material resin is dissolved or dispersed in a solvent, an additive such as a pigment is added as appropriate, and the layer is applied and dried by a known method such as roll coating, gravure coating, comma coating, etc. Get.

  (Transfer To be Transferred) If the transfer forgery prevention structure 10 and the adhesive layer 19 are transferred to the transfer target using the transfer foil having the forgery prevention structure 10, the transfer target having the forgery prevention structure 10 is obtained. According to the material to be transferred having the forgery prevention structure 10, the true / false judgment by mechanical reading of the infrared excitation infrared light emitting layer 12, and the color that can be seen depending on the viewing angle are changed by the color variable layer 25 and the hologram layer 15. The true / false judgment can be performed both by machine reading and by visual judgment of the color variable hologram.

  (Transfer material) The transfer material is not particularly limited, for example, natural fiber paper, coated paper, tracing paper, plastic film that does not deform by heat during transfer, glass, metal, ceramics, wood, cloth or dye acceptance Any medium may be used. Further, at least a part of the medium of the transfer medium may be colored, printed, or other decoration, or may be subjected to printing or other decoration.

  (Transfer) The transfer to the transfer object may be performed by a known transfer method, such as hot stamping by hot stamping (foil stamping), whole surface or stripe transfer by a heat roll, thermal transfer printer by a thermal head (thermal printing head), etc. Known methods can be applied. Any shape such as a spot shape, letters, numbers, and illustrations may be transferred.

  (Counterfeit Prevention Paper) As shown in FIG. 5, the forgery prevention sheet 10 has a forgery prevention structure 10 in which the forgery prevention structure 10 is formed on a base paper. According to the sheet having the anti-counterfeit structure 10, the authenticity determination by mechanical reading of the infrared excitation infrared light emitting layer 12, and the color in which the visible color changes depending on the viewing angle by the color variable layer 25 and the hologram layer 15. Provided is an anti-counterfeit paper having an anti-counterfeit structure that has the effect of being able to make a true / false determination both visually and visually by determining whether a variable hologram is visually observed.

(Base paper) The base paper of the anti-counterfeit paper having the anti-counterfeit structure of the present invention is not particularly limited as long as it is excellent in surface smoothness and heat resistance and has appropriate strength and thickness. Paper such as paper, thin paperboard, card paper, etc. can be applied. At a basis weight of ^{100g / m 2 ~200g / m 2} , printing, high-quality paper with excellent transfer aptitude, coated paper is preferable.

  (Paper making) Manufactured by making threads on base paper. In other words, wood pulp such as softwood bleached kraft pulp (NBKP), hardwood bleached kraft pulp (LBKP), softwood bleached sulfite pulp (NBSP), thermomechanical pulp (TMP), etc. and non-wood pulp made from hemp, cotton, and straw Etc. are mixed and beaten appropriately, and this is filled with filler, dry paper strength enhancer, wet paper strength enhancer, sizing agent, fixing agent, yield improver, freeness improver, antifoaming agent, dye, coloring pigment, fluorescent A suitable freeness is usually added to 400 to 250 ml C.I. S. F. Prepare a paper stock adjusted to. The paper stock is manufactured by using a well-known paper machine such as a long paper machine or a circular paper machine while feeding a narrow-width thread, and machine calendar and super calendar processing is performed as necessary. To do. As described above, the thread may be embedded in the base paper, half-embedded, on the surface, or may be a window opening partially exposed on the surface of the base paper, as necessary.

  (Thread) The thread used for the paper making is composed of the anti-counterfeit structure 10 having the layer structure not having the adhesive layer 19 or the adhesive layer 29, and is slit into a narrow width so that it can be made into the base paper. The layer structure of the thread is, for example, substrate 11 / infrared excitation infrared emission layer 12 / color variable layer 25 / hologram layer 15 / reflection layer 17, infrared excitation infrared emission layer 12 / color variable layer 25 / group. The layer structure of material 11 / hologram layer 15 / reflection layer 17, infrared excitation infrared emission layer 12, color variable layer 25 / reflection layer 17, hologram layer 15 / base material 11 can be exemplified.

  Moreover, you may provide another layer in an interlayer and / or front and back, as needed. Although not shown, an adhesive layer may be laminated on the front surface and / or back surface of the thread in order to improve the adhesion with the paper layer. The thread means a tape-like decorative piece which can be seen as a very narrow thread shape having a width of about 0.3 to 30 mm, preferably 1 to 10 mm, and basically has an appropriate interval between the paper layers laminated. Is inserted.

  (Modification) The reflection layer 17 may be a partial reflection layer in any form such as a label, a transfer foil, and a thread as well as the forgery prevention structure 10 described above. The method for forming the partially reflective layer may be a known method such as etching or paster.

  EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further in detail, it is not limited to this. In addition, except a solvent, each composition of each layer is a mass part of solid content conversion.

Example 1 Using a PET film having a thickness of 25 μm as the base material 11, and using the following infrared excitation infrared light-emitting ink on one surface of the base material 11, numbers and illustrations were obtained by silk screen printing. Was printed and dried to obtain an infrared excitation infrared emission layer 12.
・ <Infrared excitation infrared emission ink>
Fluorescent pigment IRS-F (manufactured by Nemoto Special Chemical) 0.5 part Vinyl acetate vinyl chloride copolymer resin 10 parts Polyester resin 10 parts Solvent (toluene: ethyl acetate = 1: 1) 80 parts Next, the infrared excitation red On the surface of the outer light emitting layer 12, the following color variable ink was used, and the entire surface was solid-printed and dried by a silk screen printing method to obtain a color variable layer 25.
・ <Color variable ink>
Iriodin 231 (Merck, pearl pigment trade name) 3 parts Acrylic resin 27 parts Solvent (toluene: ethyl acetate = 1: 1) 70 parts Next, to the color variable printing layer 25 surface, the following ionizing radiation curable resin The composition was coated with a gravure reverse coater so that the thickness after drying was 2 μm, and dried at 100 ° C.
・ <Ionizing radiation curable resin composition of hologram layer>
MHX405 varnish (trade name, manufactured by The Inktec Co., Ltd.) 80 parts Purple light UV3520EA (manufactured by Nippon Synthetic Chemical Co., Ltd., containing ester units, product name) 20 parts reactive silicone (trade name: X-22-2445, manufactured by Shin-Etsu Chemical Co., Ltd.) 0.15 parts Photopolymerization initiator (trade name Irgacure 184, manufactured by Ciba) 5 parts Solvent (methyl isobutyl ketone: toluene = 1: 1) 300 parts Next, the layer is before ionizing radiation curing, and the coating film is The finger was dry. A press die having a pseudo continuous pattern duplicated by a 2P method from a diffraction grating by a two-beam interference method is attached to the layer surface on an embossing roller of a duplicating apparatus, and is heated and pressed (embossed) with an opposing roller. Then, a relief composed of a fine uneven pattern was formed. Immediately after the shaping, the hologram layer 15 was formed by irradiating and curing with ultraviolet rays using a high-pressure mercury lamp. Titanium oxide with a thickness of 20 nm was formed on the relief surface of the hologram layer 15 by a sputtering method to form a transparent reflective layer 17. Next, the following primer layer composition was applied to the surface of the transparent reflective layer 17 with a gravure coater so that the thickness after drying was 0.5 μm and dried at 100 ° C. to form a primer layer. .
・ <Primer layer composition>
Vinyl acetate Vinyl chloride copolymer resin 10 parts Polyester resin 10 parts Solvent (toluene: ethyl acetate = 1: 1) 80 parts Next, a pressure-sensitive adhesive (Nissetsu PE-118 + CK101, manufactured by Nippon Carbide) is dried on the primer layer surface. After coating with a roll coat so that the thickness becomes 25 g / m ² , drying at 100 ° C. to evaporate the solvent, a silicone-treated PET film (SPO5, manufactured by Tokyo Cellophane Paper Co., Ltd.) is bonded as a release paper, If necessary, the anti-counterfeiting structure of Example 1 comprising the layer structure of substrate 11 / infrared excitation infrared emission layer 12 / color variable layer 25 / hologram layer 15 / reflection layer 17 / adhesion layer 29 A label having The label having the anti-counterfeit structure can be visually confirmed that a color variable hologram whose color changes depending on the viewing angle is observed and is authentic, and the number and illustration of the infrared excitation infrared light emitting layer 12 are mechanically displayed. It was found that it was authentic.

(Example 2)
Including the cholesteric liquid crystal by printing with the following color variable ink by the screen printing method, coating it so that the thickness after drying is 2.2 μm, drying at 60 ° C. and then irradiating with ultraviolet rays. A label having an anti-counterfeit structure of Example 2 was obtained in the same manner as Example 1 except that the color variable layer 25 was used.
・ <Color variable ink>
20 parts by mass of polymerizable nematic liquid crystal (manufactured by BASF Corp., trade name: “Paliocolor LC242”)
1 part by mass of chiral agent (manufactured by BASF Corp., trade name: “Palio Color LC756”)
Ultraviolet polymerization initiator 1 part by weight Toluene 78 parts by weight The label having the forgery prevention structure is visually observed to be a color variable hologram whose color changes depending on the viewing angle, and is infrared-excited. The number and illustration of the infrared light emitting layer 12 could be read by a machine, and it was found to be authentic.

(Example 3) A PET film having a thickness of 50 μm was used as the base material 11, and a TCM01 medium (trade name of melamine resin, manufactured by Dainippon Ink Co., Ltd.) was applied to one surface of the base material 11 by a gravure coating method. After being dried, it was applied to a thickness of 2 μm, dried, and baked at 180 ° C. for 20 seconds to form a release layer 13. In the same manner as in Example 1, the infrared excitation infrared light emitting layer 12 and the color variable layer 25 are provided on the surface of the release layer 13, and further a layer of ionizing radiation curable resin composition is provided. A press die with a quasi-continuous pattern duplicated by 2P method from a diffraction grating by the method is attached to an embossing roller of a duplicating apparatus, and is heated and pressed (embossed) with an opposing roller to form a fine uneven pattern. The relief was shaped. Immediately after the shaping, the hologram layer 15 was formed by irradiating and curing with ultraviolet rays using a high-pressure mercury lamp. On the relief surface of the hologram layer 15, aluminum having a thickness of 100 nm was formed by sputtering to form a reflective layer 17 made of a metal thin film. Next, the following primer layer composition was applied to the surface of the reflective layer 17 with a gravure coater so that the thickness after drying was 0.5 μm, and dried at 100 ° C. to obtain a primer layer.
・ <Primer layer composition>
Vinyl acetate vinyl chloride copolymer resin 10 parts Polyester resin 10 parts Solvent (toluene: ethyl acetate = 1: 1) 80 parts Next, TM-A1HS (manufactured by Dainichi Seika Co., Ltd.) as an adhesive layer composition on the surface of the primer layer , Product name) is coated with a gravure coater so that the coating amount after drying is 1 μm, dried at 100 ° C. to form an adhesive layer 19, substrate 11 / release layer 13 / infrared excitation red A transfer foil having an anti-counterfeit structure of Example 2 having a layer configuration of the outer light emitting layer 12 / color variable layer 25 / hologram layer 15 / reflective layer 17 / primer layer / adhesive layer 19 was obtained. The transfer foil having the anti-counterfeit structure is visually confirmed that a color variable hologram whose color changes depending on the viewing angle is observed and is authentic, and the infrared excitation infrared emission layer 12 number and illustration are used. It can be read by a machine and found to be authentic.

  (Embodiment 4) Forgery prevention structure by transferring the anti-counterfeit structure 10 and the adhesive layer 19 to a gift certificate made of high-quality paper as a transfer object using the transfer foil having the forgery prevention structure of Embodiment 3. A to-be-transferred body (gift certificate) was obtained. The gift certificate is also visually confirmed that the color variable hologram whose color changes depending on the viewing angle is observed and is genuine, and the number and illustration of the infrared excitation infrared light emitting layer 12 are read by a machine. I found out that it was authentic.

  The present invention can be used for cards such as credit cards and cash cards, stock certificates, bonds, checks, gift certificates, lotteries, commuter passes, and other securities. However, it is not particularly limited as long as it has high security and requires an authenticity determination both by machine reading and visual observation.

10: Anti-counterfeit structure 11: Base material 12: Infrared excitation infrared light emitting layer 13: Release layer 15: Hologram layer 17: Reflective layer 19: Adhesive layer 21: Transfer base material 25: Color variable layer 29: Adhesive layer

Claims (5)

At least the color variable layer provided so as to be in contact with and covering the infrared excitation infrared emission layer and the infrared excitation infrared emission layer, and the hologram layer and the hologram layer. Anti-counterfeit structure including a reflective layer,
The emitted light when the infrared excitation infrared emission layer is irradiated with excitation light in the infrared wavelength region is emitted light in the infrared wavelength region,
A layer containing a pearl pigment or a cholesteric liquid crystal whose color changes depending on the viewing angle of the color variable layer;
A relief hologram comprising a surface of the reflection layer of the hologram layer having fine irregularities;
The reflective layer is a metal reflective layer or a transparent reflective layer;
An anti-counterfeit structure, wherein the anti-counterfeit structure is visible as a color variable hologram, and the infrared excitation infrared emission layer is machine-readable.   A label having a forgery-preventing structure, wherein the base material and the anti-counterfeit structure according to claim 1 and an adhesive layer are provided in this order on one surface of the base material.   A transfer foil having an anti-counterfeit structure comprising: a transfer base material; and a release layer, the anti-counterfeit structure according to claim 1 and an adhesive layer provided in this order on one surface of the transfer base material.   A transferred object having an anti-counterfeit structure, wherein the anti-counterfeit structure and the adhesive layer are transferred to the transferred object using the transfer foil having the anti-counterfeit structure according to claim 3.   An anti-counterfeit paper having an anti-counterfeit structure, wherein the anti-counterfeit structure according to claim 1 is formed on a base paper.

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