JP4962042B2 - Label with authenticity judgment part - Google Patents

Description

  The present invention relates to a label having a true / false determination unit that can easily determine forgery or tampering and is difficult to forge.

  A product number, individual information, or the like is given by attaching a label to a high-priced product such as a luxury brand product, which is economically valuable, an ID (Identification) card, a voucher, or the like. However, labels that can be easily manufactured can be easily counterfeited, and it is difficult to distinguish between genuine and counterfeit products.

Therefore, a hologram is imparted to a label used for the above-mentioned purposes for authenticity determination and forgery prevention. In recent years, it has been proposed to use a cholesteric liquid crystal as an alternative to a hologram (see, for example, Patent Document 1).
JP 2000-25373 A

  Cholesteric liquid crystals are generally difficult to obtain, and advanced techniques are required to accurately reproduce the color tone of cholesteric liquid crystals. Therefore, the forgery prevention effect can be enhanced by using cholesteric liquid crystal. However, in recent years, forgery means are becoming more sophisticated, and thus the anti-counterfeit effect of the above technique is not always sufficient, and further improvement has been demanded.

  Therefore, an object of the present invention is to provide a label that has an excellent anti-counterfeiting effect and can be used to determine whether it is a genuine product or a counterfeit product.

  The inventors of the present invention have made extensive studies in order to achieve the above object. As a result, the inventors have found that the above object can be achieved by combining the light selective reflection layer and the hologram, and further providing a true / false determination unit in which the reflection layer forming the hologram is patterned, and the present invention has been completed.

That is, the present invention is a label having a label base material and a true / false determination part and an information receiving part on at least a part of one surface of the base material, and the authenticity determination part is from the label base material side. , reflective layer, a hologram forming layer, and has a light selective reflecting layer having light selective reflecting for reflecting either one of left circular polarized light and right circularly polarized light of the incident light in this order, information receiving unit, variable data Is a layer printed with a fluorescent color transfer ribbon or magnetic material transfer ribbon, and the reflective layer is a reflective pattern layer made of an aluminum vapor deposition layer and the material constituting the hologram forming layer is light. The label is provided including a vapor-deposited layer having visible light transparency formed by vapor-depositing vapor-deposition materials having different refractive indexes.

Furthermore, according to an aspect of the present invention , the vapor deposition material is the label selected from the group consisting of TiO ₂ and ZnS ; the label in which the light selective reflection layer is a cholesteric liquid crystal layer; and the authenticity determination unit is a thread. A certain said label is provided.

  The label of the present invention includes a light selective reflection layer having both circular polarization selectivity and selective reflection and a true / false determination unit having a complicated layer structure including a hologram. Furthermore, advanced techniques are required to pattern the hologram reflection layer. Thus, the anti-counterfeiting effect of the label of the present invention having the authenticity judgment part including the light selective reflection layer and the hologram in which the reflection layer is patterned is extremely high. In addition, if the authenticity judgment part is drawn on paper as a thread, or applied to the base material by transfer or laminating, the authenticity judgment part and the base material are integrated. Therefore, it is difficult to separate only the true / false determination unit. Thereby, the forgery prevention effect can be further enhanced.

The label of the present invention has a base material and an authenticity determination part on at least a part of one surface of the base material. The authenticity determination unit includes, from the substrate side, a reflection layer, a hologram formation layer, and a light selective reflection layer having a light selective reflection property that reflects either left circularly polarized light or right circularly polarized light among incident light. In order, the reflective layer includes a reflective pattern layer. Further, the “thread” is a thread or tape having a width of about 0.5 to 8 mm, and can be used by making it into a base paper.
In the present invention, the “authenticity determination unit” refers to a part that can discriminate between a genuine product, a counterfeit product, and a falsified product by visually checking the part and / or using a genuineness determination tool. Further, in the present invention, “visible light transmission” means that the transmittance of visible light (wavelength 380 nm to 780 nm) is, for example, 50% or more.

The authenticity determination unit includes a light selective reflection layer. The light selective reflection layer has different appearances when observed through the right circularly polarizing plate and when observed through the left circularly polarizing plate. Using this circularly polarized light selectivity and selective reflectivity, authenticity determination can be performed. Moreover, it cannot visually discriminate | determine that it shows a different external appearance with the circularly-polarizing plate to apply. In addition, it is generally difficult to obtain a material for the light selective reflection layer, and since the color variable effect varies depending on the material and composition used, it is difficult to accurately reproduce the color variable effect. Having such a light selective reflection layer is extremely effective in preventing forgery and tampering. Further, since the light selective reflection layer appears in a copy when copied by a copying machine, the forgery / falsification by copying can be effectively prevented or suppressed by having the light selective reflection layer. The pattern of the reflective layer that forms the hologram. Since a sophisticated technique is required to pattern the reflective layer, having a reflective pattern layer is extremely effective in preventing forgery and tampering. Further, the authenticity determination unit can form a complex hologram pattern by combining the pattern formed by the pattern of the hologram forming layer and the pattern formed by the pattern of the reflective layer. In order to form such a complicated hologram pattern, advanced technology is required, and this point is also effective in preventing forgery and tampering.
Thus, according to the present invention, it is possible to provide a label with a true / false determination unit that is extremely effective in preventing forgery and tampering.
Next, the detail of each part contained in the label of this invention is demonstrated.

[Authentication judgment part]
The label of the present invention has a base material and an authenticity determination part on at least a part of one surface of the base material. An application example of the authenticity determination unit to the base material will be described with reference to FIGS. However, the label of the present invention is not limited to the embodiment shown in FIGS.

  FIG. 1 is a drawing in which a true / false determination part is incorporated as a thread 3 on a base paper 2, and a plurality of exposed parts 4 where the thread 3 is exposed intermittently, and the thread 3 is intermittently covered between the exposed parts. And a covering portion 5. It can be obtained by making paper with a paper machine using a paper mesh corresponding to the pattern of the exposed portion 4 and the covering portion 5.

  FIG. 2 is similar to the one shown in FIG. 1, in which the authenticity determination unit is incorporated into the base paper 2 as a thread 3, and a plurality of exposed parts 4 where the thread 3 is intermittently exposed, and each exposure. And a covering portion 5 that intermittently covers the thread 3 between the portions. In addition, “date”, “name”, and a frame line are formed in advance as fixed information 6 by, for example, offset printing or the like on the surface of the base paper 2 that is removed from the portion where the thread 3 is provided. Further, individual data is printed as variable information 7 in the date entry field and the name entry field of the label 1.

  3 and 4 show that the authenticity determination unit 8 is integrated with the base material 2 by transfer or lamination with respect to the base material 2. FIG. The authenticity determination unit 8 is transferred or laminated on a base material such as a plastic film by using only pressure or heat and pressure through an adhesive layer. In FIG. 3, the authenticity determination unit 8 is continuously formed in a stripe shape on the label 1. In FIG. 4, the authenticity determination unit 8 is individually formed in a circular shape on the label 1. Further, “date”, “name”, and a frame line are formed in advance as fixed information 6 by, for example, offset printing or the like on the surface of the base material 2 that is out of the portion where the authenticity determination unit 8 is provided. . Further, individual data is printed as variable information 7 in the date entry field and the name entry field of the label 1. When transferring or laminating the authenticity determination portion described in FIGS. 3 and 4 to a base material via an adhesive layer, a light selective reflection layer and a hologram are formed as a transfer sheet for the authenticity determination portion so as to be peelable on the base material sheet. A transfer sheet in which a layer, a reflective layer, and an adhesive layer are sequentially formed is prepared, and the authenticity determination unit can be transferred to the substrate by superimposing the transfer sheet so that the adhesive layer is in contact with the substrate. This transfer is usually performed by applying heat and pressure.

  The authenticity determination unit is a light having a light-selective reflectivity that reflects either the left circularly polarized light or the right circularly polarized light out of the reflective layer, hologram forming layer, and incident light from the base material (label base material) side. A selective reflection layer is provided in this order, and the reflection layer includes a reflective pattern layer. A specific example of the layer configuration of the authenticity determination unit included in the label of the present invention is shown in FIG.

The authenticity determination unit, in the reference embodiment, as shown in FIG. 5 (a), can also have a reflective pattern layer alone as the reflective layer for forming a hologram, in the present invention, FIG. 5 (b) ~ As shown in (e), the reflective pattern layer and the material constituting the hologram forming layer are a combination of a vapor deposition layer having visible light permeability formed by vapor deposition of vapor deposition materials having different light refractive indexes. that Yusuke. Further, as shown in FIGS. 5A to 5C, the hologram forming layer and the light selective reflection layer may be arranged via a base material, as shown in FIGS. 5D and 5E. In addition, they may be sequentially arranged on one surface of the substrate. Further, as shown in FIGS. 5C and 5D, it is possible to have two or more light selective reflection layers, and as shown in FIG. 5C, it has a patterned light selective reflection layer. You can also.
Next, details of each layer included in the authenticity determination unit will be described.

(Base material)
The light selective reflection layer can be formed on a substrate as shown in FIG. 5, for example. However, it is not essential to provide a base material when a light selective reflection layer is formed on the hologram forming layer, or when an alignment film is provided.
As the substrate, a plastic substrate having visible light permeability and a substrate having little retardation are desirable. Specific examples include polyethylene terephthalate (PET), polycarbonate, polyvinyl alcohol, polysulfone, polyethylene, polypropylene, polystyrene, polyarylate, triacetyl cellulose (TAC), diacetyl cellulose, polyethylene-ethyl vinyl alcohol, and the like.

(Alignment film)
An alignment film can also be formed between the light selective reflection layer and the hologram forming layer, between the base material and the light selective reflection layer, or the like. In this case, the alignment film plays a role of aligning liquid crystal molecules in the light selective reflection layer and imparting desired light reflectivity.

The alignment film may be any film as long as it can be generally used as an alignment film, but preferably has visible light permeability so as not to affect the visibility of the light selective reflection layer and the hologram.
As the alignment film, for example, polyvinyl alcohol resin (PVA), polyimide resin, or the like can be used. The alignment film can be formed by applying a solvent solution of these resins by an appropriate application method and drying, followed by rubbing with a cloth, a brush, or the like. If an alignment film having good adhesion to the base film or the light selective reflection layer is selected, the alignment film functions as an adhesive layer. On the other hand, if an alignment film having poor adhesion is selected, the alignment film functions as a release layer. . For example, in the case of base material / alignment film (peeling layer) / light selective reflection layer / hologram forming layer / reflection layer, if you try to peel off the authenticity judgment part applied to the label, the upper part will peel off from the peeling layer, It is difficult to peel off the whole authenticity determination part. Therefore, the function of the alignment film as a release layer is effective for preventing falsification.

  However, since the liquid crystal layer can align liquid crystal molecules in the layer without an alignment film depending on the physical properties of the lower layer, the alignment film is not essential. For example, when a substrate made of a stretched film (for example, a PET film) is used, molecules in the liquid crystal layer can be aligned without an alignment layer. In this case, the same effect as described above can be obtained by providing a release layer on at least one surface of the substrate. As the release layer, for example, acrylic resin, vinyl chloride-vinyl acetate copolymer resin, polyester resin, polymethacrylate resin, polyvinyl chloride resin, cellulose resin, silicone resin, chlorinated rubber, casein, various surfactants, metal From an oxide or the like, one or a mixture of two or more can be used. Among these, an acrylic resin having a molecular weight of about 20,000 to 100,000, or an acrylic resin and a vinyl chloride-vinyl acetate copolymer resin having a molecular weight of 8000 to 20000, and a polyester resin having a molecular weight of 1,000 to 5,000 as an additive. It is particularly preferable that the composition comprises ˜5% by weight. It is preferable that the peeling force between the two layers laminated via the peeling layer is 1 to 5 g / inch (90 ° peeling). Moreover, it is preferable that the thickness exists in the range of 0.1 micrometer-2 micrometers from surfaces, such as peeling force and foil cutting.

  Furthermore, the same effect as described above can be obtained also by making the surface of the substrate facing the light selective reflection layer easy to peel. In general, some transparent films that can be used as a substrate exhibit an adhesive strength that can be laminated with other layers, but usually a treatment for improving the adhesive strength is performed. Therefore, by not using this adhesive strength improving treatment or adjusting the degree thereof, by using a transparent film whose surface adhesive strength is intentionally lowered (easily peeled), The adhesive strength of can be reduced. If such a transparent film is used as a base material, since it peels on the easily peeled surface, the same effect as described above can be obtained.

Examples of the adhesive strength improving treatment include corona discharge treatment, plasma treatment, flame treatment, primer coating treatment, and saponification treatment. Any processing can be performed using a known apparatus and method. The treatment conditions can be appropriately set so that an adhesive force can be applied to the surface of the base film so that it can be peeled off from the surface when it is peeled off. In addition, when a film having an adhesive strength that can be bonded to other layers even if untreated, such as a polyethylene terephthalate film, is used as a base material, it is peeled off from the base material surface by not performing the adhesive strength improving treatment. be able to.
Moreover, if the film thickness of the base film is excessively reduced or the components are adjusted and the strength of the base material itself is intentionally reduced, an external force is applied to the article to which the authenticity determination medium of the present invention is applied. If the medium is peeled off, the base material is destroyed, so that the same effect as described above can be obtained.

(Light selective reflection layer)
The light selective reflection layer only needs to have a light selective reflection property of reflecting either left circularly polarized light or right circularly polarized light in incident light, and is preferably a cholesteric liquid crystal layer. Moreover, if it has visible-light transmittance, the pattern of the hologram of a lower layer can be visually recognized easily. Here, the cholesteric liquid crystal layer is a layer containing cholesteric liquid crystal molecules. In general, liquid crystal materials are difficult to obtain, and advanced alignment techniques are required. Therefore, if the light selective reflection layer is a cholesteric liquid crystal layer, a high forgery prevention effect can be obtained.

  When the light selective reflection layer is a cholesteric liquid crystal layer, the liquid crystal material to be used is not particularly limited, and a known material can be used. The cholesteric liquid crystal layer can be formed by dissolving a cholesteric liquid crystal material in an appropriate solvent, applying it by various printing methods, and drying it. At this time, an ultraviolet-polymerizable composition is prepared using a polymerizable cholesteric liquid crystal, and the obtained ultraviolet-polymerizable composition is applied by various printing methods, and after drying, it is polymerized by irradiation with ultraviolet rays. You can also.

  Specifically, as a material for forming the cholesteric liquid crystal layer, 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.

  Examples of the three-dimensionally crosslinkable monomer molecule include a mixture of a liquid crystal monomer and a chiral compound as disclosed in, for example, JP-A-7-258638 and JP-T-10-508882. As a more specific example, for example, liquid crystalline monomers represented by the following general chemical formulas (1) to (11) can be used. In the case of the liquid crystalline monomer represented by the general chemical formula (11), X is preferably an integer in the range of 2 to 5.

  Moreover, as a chiral agent, a chiral agent as shown, for example by the following general chemical formula (12)-(14) can be used. In the case of the chiral agent represented by the general chemical formulas (12) and (13), X is preferably an integer in the range of 2 to 12, and in the case of the chiral agent represented by the general chemical formula (14), X Is preferably an integer in the range of 2-5.

  When oligomer molecules are used, a cyclic organopolysiloxane compound having a cholesteric phase as disclosed in, for example, JP-A-57-165480 can be used. For example, a cholesteric liquid crystal layer can be obtained by adding about several to 10% of a chiral agent to polymerizable monomer molecules or polymerizable oligomer molecules. The cholesteric liquid crystal layer can be formed as a layer having a substantially uniform thickness, but can also be a pattern layer in which a pattern is formed depending on the presence or absence of the layer and the thickness. The pattern layer can be formed using various printing methods.

  The light selective reflection layer can also be formed from two or more layers having different light reflectivities. For example, the light reflectivity can be changed by changing the thickness of a plurality of cholesteric liquid crystal layers or forming each layer using liquid crystal materials having different spiral pitches. When a cholesteric liquid crystal layer is formed from an ultraviolet polymerizable composition using a polymerizable cholesteric liquid crystal as described above, a polymerizable nematic liquid crystal and a chiral agent are used in combination, and at this time, the polymerizable nematic liquid crystal and the chiral agent are used. Cholesteric liquid crystal layers having different helical pitches can be formed by preparing and using ultraviolet polymerizable compositions having different blending ratios with the agent. Even when two or more kinds of cholesteric liquid crystal layers are provided in this way, each cholesteric liquid crystal layer can be formed as a layer having a substantially uniform thickness, but a pattern is formed depending on the presence or absence of the layer and the difference in thickness. It can also be a pattern layer.

  In addition, when two light selective reflection layers are provided, a retardation layer can be provided between the two layers. The phase difference layer is a layer that birefrings incident light to generate different phases depending on the polarization direction, thereby providing a phase difference. Birefringence is a phenomenon that occurs because the refractive index of a medium is not uniform depending on the polarization direction, and the phase difference σ of light transmitted through such a medium is given by σ = 2π (ne−no) d / λ. It is known. Here, ne is the extraordinary ray refractive index, no is the ordinary ray refractive index, d is the thickness of the medium, and λ is the wavelength of the light. That is, for a medium having a certain thickness d, the phase difference σ depends on the wavelength λ of light. When right circularly polarized light having a wavelength λ = 2 (ne-no) d is incident on the retardation layer, a phase difference σ = π (that is, ½ wavelength) is given while transmitting the right circularly polarized light. Therefore, the incident right circularly polarized light is converted into left circularly polarized light and emitted, and the incident left circularly polarized light is converted into right circularly polarized light and emitted.

  When two light selective reflection layers are laminated via a retardation layer, the two light selective reflection layers may have light reflectivity that reflects circularly polarized light in the same direction when viewed from one side. preferable. Hereinafter, this point will be described with reference to FIG. 6 by taking, as an example, a case where two light selective reflection layers having light reflectivity for reflecting right circularly polarized light in incident light are stacked via a retardation layer. To do. In FIG. 6, layers other than the light selective reflection layer and the retardation layer are omitted for simplification.

As shown in FIG. 6, when natural light is incident from the light selective reflection layer A side, the natural light includes right circularly polarized light and left circularly polarized light. Therefore, only the right circularly polarized light is selected by the action of the light selective reflective layer A. Is reflected. Therefore, when the right circularly polarizing plate is stacked on the light selective reflection layer A, this reflected light (right circularly polarized light) can be observed through the right circularly polarizing plate.
Further, of the natural light incident from the light selective reflection layer A side, the left circularly polarized light passes through the light selective reflection layer A without being reflected by the light selective reflection layer A. The transmitted left circularly polarized light is converted into right circularly polarized light through a retardation layer (“left → right” in the figure indicates conversion from left circularly polarized light to right circularly polarized light). The converted right circularly polarized light is reflected by the light selective reflection layer B. This reflected light (right circularly polarized light) is transmitted again through the retardation layer 2 and converted into left circularly polarized light (“right → left” in the figure indicates conversion from right circularly polarized light to left circularly polarized light. ). The converted left circularly polarized light is emitted through the light selective reflection layer A. Therefore, when the left circularly polarizing plate is superimposed on the light selective reflection layer A, the emitted light (left circularly polarized light) can be observed through the left circularly polarizing plate.
As described above, in the embodiment shown in FIG. 6, by using the right circularly polarizing plate or the left circularly polarizing plate alone, it is possible to observe light that has passed through different processes as described above. Since this property cannot be visually recognized, it cannot be confirmed that such a forgery preventing means is applied unless a circularly polarizing plate is used. This is effective in preventing forgery and tampering. Furthermore, it is preferable that the two light selective reflection layers have different center wavelengths of reflected light. If the center wavelength of the reflected light is different, the color of the reflected light observed when the right circularly polarizing plate is superimposed is different from the color of the reflected light observed when the left circularly polarizing plate is superimposed. The difference in the color of the light observed when using the plate and when using the left circularly polarizing plate can further enhance the effect of preventing forgery and tampering.

  In addition, when the two light selective reflection layers have reflectivity with respect to circularly polarized light in different directions, when either the right circularly polarizing plate or the left circularly polarizing plate is used individually, either one of the circularly polarizing plates is overlapped. In this case, no reflected light is observed and the color becomes black. Therefore, when one circularly polarizing plate is overlapped, reflected light is observed, but when the other circularly polarizing plate is overlapped, no reflected light is observed. This property can also be used to prevent counterfeiting and tampering.

(Retardation layer)
The retardation layer is not particularly limited as long as it can birefring incident light, generate different phases depending on the polarization direction, and impart a retardation, for example, a transparent film, a nematic liquid crystal layer, or a nematic liquid crystal layer. It can comprise with a laminated body with a transparent film.

  The retardation layer can be composed of, for example, nematic liquid crystal, and can be formed by various printing methods using an ink composition containing nematic liquid crystal, preferably an ink composition comprising a solvent solution of nematic liquid crystal. . In addition, the retardation layer can be composed of only a nematic liquid crystal layer, or a laminate in which a nematic liquid crystal layer is laminated on the surface of a transparent film having orientation by itself can be used as the retardation layer. . Alternatively, a laminate obtained by laminating a nematic liquid crystal layer on a transparent film via an alignment film can be used as the retardation layer.

  As the transparent film, those having high mechanical strength and those having solvent resistance and heat resistance that can withstand processing when producing a medium for authenticity determination are preferable. Although it is not limited because it depends on the purpose of use, a film-like or sheet-like plastic is preferable. For example, various plastic films such as polyethylene terephthalate (PET), polycarbonate, polyvinyl alcohol, polysulfone, polyethylene, polypropylene, polystyrene, polyarylate, triacetyl cellulose (TAC), diacetyl cellulose, and polyethylene / vinyl alcohol can be exemplified. . Among these, a polyethylene terephthalate film is preferable because it can be used alone as a retardation layer.

  When the light selective reflection layer is a cholesteric liquid crystal layer, an alignment film can be laminated on one side or both sides of the retardation layer as necessary. Details of the alignment film are as described above. However, depending on the physical properties of the retardation layer, the liquid crystal molecules in the cholesteric liquid crystal layer can be aligned without an alignment film, so the alignment layer is not essential. For example, when a stretched film (for example, a PET film) is used as the retardation layer, liquid crystal molecules in the cholesteric liquid crystal layer can be aligned without an alignment layer.

(Middle layer)
Further, when two or more light selective reflection layers are laminated, an intermediate layer other than the retardation layer is provided between the light selective reflection layers for the purpose of preventing adverse effects such as coloring troubles due to the interaction between the light selective reflection layers. Can also be provided. As the resin constituting the intermediate layer, starches, celluloses, gelatin, casein, polyvinyl alcohols, maleic anhydride copolymers, acrylics, styrene-butadiene copolymer emulsions, urea resins, melamine resins, amide resins, A polyurethane resin etc. are mentioned. The resin as described above and various auxiliary agents as necessary can be added to prepare an ink, which can be formed by a known coating method such as offset printing, letterpress printing, or gravure coating. The intermediate layer is preferably a layer having visible light transmittance so that the light selective reflection layer and the hologram positioned below the intermediate layer can be easily distinguished from the viewpoint of the observer. The thickness of the intermediate layer is, for example, 0.1 μm or more, preferably 1 to 10 μm, from the viewpoint of maintaining the function as the intermediate layer, adhesion to the light selective reflection layer, and cost, and about 0 in the coating amount when dried. .About 1 to 10 g / m ² .

  In addition, the light selective reflection layer can be formed using various materials in addition to the cholesteric liquid crystal layer, for example, using a pigment whose color changes depending on the viewing angle, using a vapor deposition thin film, or a dichroic dye. Can be configured. Examples of pigments whose color changes depending on the viewing angle include pearl pigments in which layers of high refractive index silicon oxide, titanium oxide, iron oxide, and the like, and layers of low refractive index mica, etc. are laminated. Are available from Shiseido Co., Ltd. under the trade name; Infinite Color and Merck (Germany) trade name; Iriodin. The deposited thin film is formed by forming a metal such as aluminum or other material as a thin film by a vapor phase method, and exhibits a so-called interference color like an oil thin film floating on the water surface. A dichroic dye is composed of long-chain dye molecules that have different light absorption depending on the direction of the molecular axis. For example, the light component in the normal direction relative to the direction of the molecular axis of the dye molecule has almost no absorption. The light component in the direction parallel to the direction of the molecular axis has an absorptive property and does not transmit light, and examples include anthraquinone, azo, or bisazo dyes. can do. Among the above, pigments or dichroic dyes that change color depending on the viewing angle are dispersed in an appropriate binder resin and diluted with a solvent to form a coating composition, such as silk screen printing, gravure printing, or publicly known What is necessary is just to apply to a target surface by the coating method of this.

(Hologram forming layer)
As the hologram forming layer, a known hologram forming layer can be used, but in order to make use of the color tone change of the light selective reflection layer as described above, a layer having visible light permeability is preferable. For example, the hologram forming layer can be produced by forming fine irregularities of a relief hologram on one side of a layer made of a transparent resin material. Various resin materials such as various thermosetting resins, thermoplastic resins, and ionizing radiation curable resins can be selected as the transparent resin material for constituting the hologram forming layer. Examples of the thermosetting resin include unsaturated polyester resins, acrylic urethane resins, epoxy-modified acrylic resins, epoxy-modified unsaturated polyester resins, alkyd resins, and phenol resins. Examples of the thermoplastic resin include acrylate resin, acrylamide resin, nitrocellulose resin, and polystyrene resin. These resins can be used alone or as two or more types of copolymers. In addition, these resins may be used alone or in combination of two or more types of isocyanate resins, metal soaps such as cobalt naphthenate and zinc naphthenate, benzoyl peroxide, peroxides such as methyl ethyl ketone peroxide, benzophenone, acetophenone, anthraquinone, naphthoquinone, A heat or ultraviolet curing agent such as azobisisobutyronitrile or diphenyl sulfide may be blended. Examples of the ionizing radiation curable resin include epoxy acrylate, urethane acrylate, and acrylic-modified polyester. Other monofunctional or polyfunctional monomers, oligomers and the like can be conjugated to such ionizing radiation curable resins for the purpose of adjusting the cross-linking structure and viscosity.

  The hologram forming layer can be directly formed by developing the photosensitive resin material by performing interference exposure of the hologram. However, a relief hologram prepared in advance or a duplicate thereof, or a plating mold thereof is used for replication. Molding can also be performed by using it as a mold and pressing the mold surface against the resin material. When a thermosetting resin or ionizing radiation curable resin is used, it is cured by heating or irradiation with ionizing radiation while the uncured resin is kept in close contact with the mold surface, and the cured transparent film is peeled off after curing. The fine irregularities of the relief hologram can be formed on one side of the layer made of the resin material. In the present invention, a diffraction grating forming layer having a diffraction grating formed into a pattern by a similar method is included in the hologram forming layer. A combination of the hologram forming layer and the diffraction grating forming layer is referred to as an optical diffraction structure layer.

(Reflective layer)
In the authenticity determination medium of the present invention, the reflective layer forming the hologram includes a reflective pattern layer. Since the technology for patterning the reflective layer is very advanced, it is very effective for preventing counterfeiting to include the reflective pattern layer in the authenticity determination part. Furthermore, the pattern formed by the hologram forming layer and the pattern formed by the reflective layer including the reflective pattern layer are combined to have a complicated appearance and excellent design. In addition, when combining a light selective reflection layer and a hologram, if the hologram reflection layer is a so-called opaque reflection layer that does not transmit visible light, the color and color change of the light selective reflection layer (the effect that the color changes depending on the viewing angle). It may be difficult to visually confirm this. On the other hand, in the authenticity determination medium of the present invention, the reflective layer positioned below the hologram forming layer has a pattern shape of the reflective layer forming the hologram, so the reflective pattern layer is a so-called opaque reflective layer. However, the color change of the light selective reflection layer can be confirmed in the portion where the reflective pattern layer is not laminated. Further, as will be described later, the reflective layer is a reflective pattern layer and a material constituting the hologram forming layer is a vapor deposition layer having visible light permeability formed by vapor deposition of a vapor deposition material having a different refractive index of light . in to Rukoto in combination, it is possible to arrange a reflective layer underlying the entire surface of the hologram, it can be visualized by the entire surface of the hologram pattern. Thereby, authenticity determination by the color variable effect of the light selective reflection layer and authenticity determination by the hologram pattern can be easily performed on the entire surface.

When the reflective pattern layer is formed from a material such as a metal that reflects light, an opaque type hologram can be obtained, and when it is formed from a material having visible light transparency, a transparent type hologram can be obtained. As will be described later, in the authenticity determination medium of the present invention, the visible light transmissive reflective pattern layer and the material forming the hologram forming layer are formed by vapor deposition of vapor deposition materials having different light refractive indexes. It is also possible to combine vapor deposition layers having visible light permeability . In this case, the pattern of the reflective pattern layer can be visually confirmed by the difference in refractive index between the reflective pattern layer and the vapor deposition layer.

  An example of the pattern of the reflective pattern layer is shown in FIG. As shown in FIG. 7 (a), the pattern has a reflection layer in which squares having a narrow width in the horizontal direction and long squares in the vertical direction are arranged at equal intervals, for example, the length of the square in the horizontal direction (ie, width). Or a stripe pattern formed by arranging with equal intervals, or, as shown in FIG. 7B, the reflective layer 5 has a geometric shape (rectangular shape and star shape). There may be. Moreover, when a specific pattern as described above is used as a positive pattern, the pattern may be a negative pattern thereof. Note that these patterns are merely examples, and the patterns can be freely determined mainly from the viewpoint of design, and may be characters or symbols other than geometric shapes, or arbitrary shapes. Further, the pattern may be synchronized with the hologram of the hologram forming layer. Here, the tuning means that, as shown in FIG. 8A, for example, a continuous picture is formed by a picture shown by the hologram forming layer and a picture shown by the pattern of the reflective pattern layer. It means that both pictures form one continuous picture. Since a sophisticated technique is required to synchronize the pattern of the reflective pattern layer with the pattern of the hologram forming layer, the anti-counterfeiting effect of the authenticity determination medium formed using this technique is extremely high. On the other hand, non-synchronization means that the pattern represented by the hologram forming layer and the pattern represented by the pattern of the reflective pattern layer do not match. As an out-of-tune mode, for example, as shown in FIG. 8B, the pattern pattern of the reflective pattern layer is a continuous pattern, or, for example, as shown in FIG. Some of the patterns to be formed are continuous patterns.

  The size of the pattern may be anything that can be resolved with the naked eye. For example, when the shape is a quadrangle, the length and width can be 1 mm × 1 mm or more, preferably 3 mm × 3 mm or more, and more preferably 5 mm × 5 mm or more. In the case of a geometric shape, if it is circular, the diameter can be 1 mm or more, preferably 3 mm or more, more preferably 5 mm or more, and in the case of other shapes, an inscribed circle The diameter can be, for example, 1 mm or more, preferably 3 mm or more, more preferably 5 mm or more.

As shown in FIGS. 7C and 7D, the reflective pattern layer may be laminated in a fine pattern. As shown in FIG. 7 (c), the pattern (fine pattern) in this case is a reflection layer composed of a finite-width line extending from the left side toward the upper side toward the right side toward the upper side. It may be a fine line-patterned fine pattern arranged at a pitch of about twice, or a circular or square-shaped reflective layer as shown in FIG. It may be arranged at an equal pitch.
These fine patterns are merely examples, and the patterns constituting the fine patterns can be freely determined. Therefore, geometric patterns other than line patterns and halftone dots, and shapes such as letters or symbols are used. There may be. The size of the pattern constituting the fine pattern is preferably a fine one that is difficult to observe or cannot be observed by normal observation. In the case of a line pattern, the line width is set to 0.3 mm, for example. Hereinafter, it can be preferably 0.1 mm or less. The pattern can be made small as long as it can be formed, but is preferably about 0.01 mm or more in practice. When the halftone dot is circular, the diameter can be, for example, 0.3 mm or less, preferably 0.1 mm or less, and preferably about 0.01 mm or more. In addition, when the halftone dots are rectangular, the length and width can be set to, for example, 0.3 mm × 0.3 mm or less, preferably 0.1 mm × 0.1 mm or less, and about 0.01 mm × 0.01 mm or more. It is preferable that In the case of other shapes, the diameter of the inscribed circle can be, for example, 0.3 mm or less, preferably 0.1 mm or less, and preferably about 0.01 mm or more.

  When the pattern is a fine pattern, an outer shape pattern (in the case of FIG. 7 (c) or (d), an outer shape rectangle) can be arbitrarily set. The pattern may be synchronized with the hologram pattern on the hologram forming layer.

  When the reflective pattern layer forms a fine pattern, the area ratio of the reflective pattern layer is, for example, 20% to 80%, and preferably 30% to 60%.

  Examples of metal materials for forming the reflective pattern layer include Al, Cr, Ti, Fe, Co, Ni, Cu, Ag, Au, Ge, Mg, Sb, Pb, Cd, Bi, Sn, Se, In, A metal such as Ga or Rb, or an oxide or nitride of the metal can be used, and one or more of these can be used in combination. Among these, Al, Cr, Ni, Ag, Au, or the like is particularly preferable, and the film thickness is preferably 1 nm to 10,000 nm, more preferably 2 nm to 200 nm.

As a material for forming the reflective pattern layer having visible light transmittance, a transparent material having a refractive index different from that of the material forming the hologram forming layer can be used. The light refractive index of the transparent material may be larger or smaller than the light refractive index of the material forming the hologram layer, but the difference in the light refractive index from the hologram forming layer is 0.1 or more. It is preferable that it is preferably 0.5 or more, and particularly preferably 1.0 or more. Specific examples of the material preferably used include titanium oxide (TiO ₂ ), zinc sulfide (ZnS), Cu · Al composite metal oxide, and the like. Since a metal thin film having a thickness of 20 nm or less also has transparency, it can be used as a material constituting a transparent layer having a light refractive index different from that of the hologram layer.

  Various methods are mentioned as a method of forming a reflective pattern layer. For example, a method of forming a thin film by a vacuum deposition method, a sputtering method, an ion plating method, or the like through a pattern mask, a printing method, or the like can be used. Alternatively, a method of removing unnecessary portions after forming the reflective layer over the entire surface can be used.

Hereinafter, an example of a method for forming a reflective pattern layer by removing unnecessary portions after forming the reflective layer on the entire surface will be described with reference to FIGS.
FIG. 9 is an explanatory diagram of a method for patterning a reflective layer using a water-soluble resin pattern. In FIG. 9 and FIG. 10 quoted in the following description, layers other than the hologram forming layer, for example, a light selective reflection layer, are omitted.

As shown in FIG. 9 (a), first, a hologram forming layer having hologram fine irregularities on its lower surface is produced.
Next, as shown in FIG. 9B, a water-soluble resin pattern is formed in a portion where the reflective metal layer on the surface of the hologram forming layer where the fine irregularities are formed is unnecessary. The water-soluble resin pattern can be formed by printing using a water-soluble resin composition in which a water-soluble resin or a water-swellable resin is dissolved or dispersed, so-called water-soluble ink.
Then, as shown in FIG.9 (c), a reflective layer is formed in one surface in which the water-soluble resin pattern was formed. Then, the surface on which the reflective layer is formed is contacted with water or an acidic or alkaline aqueous solution to remove the water-soluble resin pattern, and the portion of the reflective layer on which the water-soluble resin pattern is laminated is removed. As a result, as shown in FIG. 9D, the reflective layer of the portion where the water-soluble resin pattern is not laminated remains, and the reflective layer is formed in a pattern.

FIG. 10 is an explanatory diagram of a method for patterning a reflective layer using a resist pattern.
First, as shown in FIG. 10A, a hologram forming layer having hologram fine irregularities on the lower surface is formed.
Next, as shown in FIG. 10B, a reflective layer is formed on one surface of the hologram forming layer on which fine irregularities are formed.
Thereafter, as shown in FIG. 10C, a resist pattern is formed on the lower surface of the reflective layer where the reflective layer is required. Thereafter, an etching solution is applied to the surface on which the resist pattern is formed, and the reflective layer in a portion other than the portion covered with the resist pattern is etched and removed. As a result, as shown in FIG. 10D, a portion of the reflective layer covered with the resist pattern remains, and the reflective layer is formed in a pattern. Note that the resist pattern remaining on the reflective layer formed in a pattern may be left as it is, but if it is desired to be removed, the remaining resist pattern may be dissolved.

The above method using a water-soluble resin pattern or a resist pattern is suitable for mass-producing authenticity determination media having the same pattern. In addition to the various methods described above, the reflective layer may be patterned by partially heating the reflective layer and melting the heated portion of the reflective layer by heating with a thermal head or laser light irradiation. Alternatively, there is a method of removing by evaporation. This method can be performed even after each layer is laminated, and if anything, it is suitable for patterning based on individual information.
The various methods for patterning the reflective layer described above can be used in any combination.

( Deposition layer)
The reflection layer forming the hologram includes a reflective pattern layer and a vapor deposition layer having visible light permeability formed by vapor deposition of a vapor deposition material having a light refractive index different from that of the material forming the hologram formation layer. You can also Variations of the reflective layer stack in this case are shown in FIG. In the authenticity determination medium of the present invention, a vapor deposition layer may be provided in a pattern in a portion where the reflective pattern layer is not laminated as shown in FIG. However, it is preferable to provide the entire surface as shown in FIGS. 11B and 11C from the viewpoint of ease of manufacture. The order of stacking the reflective pattern layer and the visible light transmissive reflective layer may be the order of hologram forming layer / reflective pattern layer / deposition layer as shown in FIG. 11 (b), as shown in FIG. 11 (c). Alternatively, the order of hologram forming layer / deposition layer / reflective pattern layer may be used. However, from the viewpoint of ease of layer formation, it is preferable to form a vapor deposition layer on a reflective pattern layer as shown in FIG. 11B.

Deposited layer, using various materials described above as the reflective layer material for forming a hologram of the transparent type, by vacuum deposition or the like, subjected to a film forming process on the laminate surface formed, for example, reflective pattern layer Can be produced. Although the film thickness of a vapor deposition layer is not specifically limited, For example, it can be set as 1-10000 nm.

(Underlayer)
An underlayer can be provided on the surface of the reflective layer opposite to the surface having the hologram forming layer. When the hologram forming layer has visible light transparency, the color of the underlayer can be visually recognized without being blocked by the hologram. Therefore, by adding a desired color to the underlayer, various colors can be used depending on the combination with the color of the light selective reflection layer. It is possible to obtain a true / false authenticity determination medium. Moreover, the visibility of a light selective reflection layer and a hologram can also be improved by providing a colored layer as a base layer. In addition, it is also possible to attach a design such as characters and figures to the underlayer. The foundation layer can be formed from a material that constitutes an adhesive layer of a later-described authenticity determination unit. In any case, the base layer having a desired color tone can be obtained by adding an appropriate amount of pigment, dye or the like. As pigments to be added, inorganic pigments such as Gunjo, Cadmium Yellow, Bengala, Chrome Yellow, Lead White, Titanium White, Carbon Black, and other organic pigments such as azo, triphenylmethane, quinoline, anthraquinone, phthalocyanine, etc. As dyes, azo dyes, anthraquinone dyes, indigoid dyes, sulfur dyes, triphenylmethane dyes, xanthene dyes, xanthene dyes, alizarin dyes, acridine dyes, quinoneimine dyes (azine dyes, oxazine dyes, thiazine dyes) , Thiazole dyes, methine dyes, nitro dyes, nitroso dyes, and the like. The density | concentration of the dye and pigment to add can be adjusted according to a desired color tone.

  The authenticity determination unit may have a layer other than the above-described layers at an arbitrary position as necessary. For example, it can also have a well-known protective layer and various functional layers.

  In the authenticity determination unit, the thickness of each layer is appropriately set and is not particularly limited. For example, the thickness of the light selective reflection layer is 0.1 to 30 μm, and the thickness of the hologram forming layer is The thickness is 0.1 to 20 μm. The thickness of the reflective layer is as described above. Moreover, when providing a base material, an alignment film, and a base layer, the thickness of a base material is 3-250 micrometers, for example, the thickness of an alignment film is 0.05-20 micrometers, for example, and the thickness of a base layer is 0. It can be 1-50 micrometers.

  The authenticity determination unit can be prepared in advance to a size to be applied to the base material, but can also be prepared by cutting a sheet-like, film-like or plate-like original fabric into a desired size. In addition, the shape and size of the authenticity determination unit are determined according to the size of the label, the size of the article to which the label is applied, the location where the label is applied, and the like, and are not particularly limited.

The label of this invention should just have the said authenticity determination part in at least one part of one surface of a base material, and the application method to the base material of a authenticity determination part is not limited. For example, the authenticity determination unit can be applied to the substrate by producing a seal-like authenticity determination unit and attaching the seal to the substrate. However, in order to enhance the forgery prevention effect, it is preferable that the authenticity determination unit is formed on paper as a thread, or is applied to the substrate by transfer or lamination. If the authenticity determination unit and the base material are integrated by the above method, it is difficult to separate only the authenticity determination unit from the authentic product in order to apply to the counterfeit product, and the forgery prevention effect can be further enhanced.
Hereinafter, a method for embedding the authenticity determination unit as a thread, a method for laminating the authenticity determination unit, and a transfer method will be described.

[How to create a thread]
One embodiment of a method for drawing a thread on a base paper when the authenticity determination unit is a thread will be described below.
First of all, in a circular paper machine equipped with two tank bats, a predetermined size of tape is pasted on the same circumferential surface of the first cylinder cylinder, and the mesh is closed. As the first paper layer, a paper layer (first paper layer) having holes of a predetermined size is formed at regular intervals. The second tank circular mesh cylinder is not subjected to the above-described work, and a plain second paper layer is formed.

  Also, a thread unwinding device is installed between the first and second tank cylinders so that the thread is inserted at a position overlapping the hole in the first paper layer. At this time, in a state where the first paper layer and the second paper layer are laminated, the thread is positioned at the position of the hole in the first paper layer, and the light selective reflection layer is positioned on the viewer side. In this state, a label with a true / false determination unit can be manufactured by performing a surface smoothing process by a machine calendar process or a super calendar process. In this case, a label of the type shown in FIGS. 1 and 2 in which the exposed portion and the covering portion are repeatedly formed on one side of the thread is obtained. In addition, if the tape is continuously stuck on the circumferential surface of the circular mesh cylinder of the first tank and the mesh is closed, a thread having a continuous stripe-shaped exposed portion is made on the base paper. Can be included.

[Method of laminating authenticity judgment part]
Next, one embodiment of a method of laminating a true / false determination unit on a substrate and integrating the substrate and the authenticity determination unit will be described.
The authenticity determination part and the label base material (for example, plastic base material) are overlapped in the direction in which the adhesive layer provided on the authenticity determination part is in contact with the label base material, and the authenticity is determined by pressure alone or by heat and pressure. Laminate the judgment part and the label base material. As the adhesive constituting the adhesive layer, known pressure-sensitive adhesives and heat-sensitive adhesives can be used. If the adhesive constituting the adhesive layer is a pressure sensitive adhesive, only pressure is applied, and if the adhesive is a heat sensitive adhesive, heat and pressure are applied.

[Method of transferring authenticity judgment part]
The following transfer method is mentioned as a specific example of the method for transferring the authenticity determination part to the base material and integrating the base material and the authenticity determination part.
(1) Using the authenticity determination part as a transfer foil, the entire transfer foil is transferred to the label base material using heat and pressure.
(2) Using a transfer sheet provided with a true / false judgment part on a base film, using heat and pressure, transfer the true / false judgment part to the base material, and then authenticate the base film of the transfer sheet. Remove from the judgment section.
(3) A label (with a separator) provided with a true / false determination unit is attached to the substrate.

[Label substrate]
The label substrate can be, for example, a sheet-like, film-like or plate-like paper or plastic substrate. When the thread-like authenticity determination unit is applied, paper is usually used as the base material. As the base paper, wood pulp such as softwood bleached kraft pulp (NBKP), hardwood bleached kraft pulp (LBKP), softwood bleached sulfite pulp (NBSP), etc., and non-wood pulp made from hemp, cotton and straw are used as appropriate. And beaten to prepare a main agent, which includes a filler, a dry paper strength enhancer, a wet paper strength enhancer, a sizing agent, a fixing agent, a yield improver, a drainage improver, an antifoaming agent, a dye, and a coloring pigment. It is preferable to use paper made by using a known paper machine such as a long net paper machine or a circular net paper machine using raw materials to which an auxiliary agent such as a fluorescent agent is appropriately added. The thickness of the base paper is generally about 0.02 to 5 mm.

  On the other hand, when applying the authenticity judgment part by transfer or lamination, the base material is polyethylene terephthalate (PET), nylon, cellulose diacetate, polystyrene, polyethylene, polypropylene, polyester, polyimide, polyvinyl chloride, polycarbonate, or other plastics. Metals such as copper and aluminum, paper, impregnated paper and the like can be used alone or in combination and appropriately laminated. In this case, the thickness of the base material is suitably about 0.005 to 5 mm.

[Adhesive layer]
The label of the present invention can have an adhesive layer on the surface opposite to the surface having the authenticity determination part in order to affix to various articles. Further, a release sheet can be provided on the adhesive layer. In this case, the release sheet is peeled off, and the label with authenticity determination portion can be attached to an arbitrary article by the adhesive layer. However, the label of the present invention only needs to be applicable to an arbitrary article by an arbitrary method. For example, when the label is applied as a tag, for example, the adhesive layer is not essential.

The pressure-sensitive adhesive layer can be formed by using, for example, an aqueous type or solvent type coating liquid made of an acrylic resin, a natural rubber resin, a synthetic rubber resin, a silicone resin, or the like. The coating method is not particularly limited, and general methods such as a roll coater method, a reverse coater method, a knife coater method, a comma coater method, and a gravure coater method can be used.
The coating amount is preferably about 0.1 to 50 g / m ² (dry state).

The release sheet is laminated to protect the pressure-sensitive adhesive layer until the label is attached to the article, and is peeled off during use. A general release sheet can be used as the release sheet, and is not particularly limited. For example, high-quality paper, coated paper, cast coated paper, aluminum foil / paper, resin-impregnated paper, synthetic paper, and other paper base materials, polyester resin, polypropylene resin, vinyl chloride resin, foamed polyester resin, foamed polypropylene resin, etc. A material obtained by coating a silicone resin as a release agent on one surface of the molecular resin film base substrate can be used. In the case of a paper base, the paper has a basis weight of 30 to 300 g / m ² , and in the case of a film base, a film having a thickness in the range of 10 to 300 μm is preferable.

[Record variable information]
The label of the present invention can have an information receiving unit in addition to the authenticity determination unit. In the present invention, the “information receiving portion” refers to a portion where information can be recorded by an arbitrary printing method. The information receiving unit can be provided on the surface having the authenticity determination unit or on the surface opposite to the surface. For example, when the label of the present invention is attached to an article as a tag, the recorded information can be visually recognized regardless of which surface the information receiving portion is provided. On the other hand, when the label of the present invention is attached to an article via an adhesive layer, an information receiving portion may be provided on the same surface as the authenticity determination portion so that the information recorded in the attached state can be visually recognized. preferable.

  Information to be recorded in the information receiving section includes the date of manufacture, product name, name, address, etc., and the products to which the authenticity determination section label is attached (high-priced products, identification cards, credit cards, savings cards , Prepaid card, commuter pass, traveler's check, cash voucher, etc.) individual data (variable information) for specifying the type. Examples of the variable information printing method include a thermal transfer method in which numbers and symbols are printed by a thermal head using a thermal transfer ribbon, an ink jet method, a dot impact method, and a toner transfer method by laser irradiation. The label of the present invention having the information receiving portion can be used as a print label. Furthermore, when used as a print label, when recording variable information, for example, a transfer layer containing a color material that emits fluorescence as described in Japanese Patent Application Laid-Open No. 2005-178204 is used in order to increase the anti-counterfeiting property. The transferred print portion may be fluorescently colored by the fluorescent transfer ribbon, or the transferred print portion may have magnetic characteristics using a transfer ribbon having a transfer layer containing a magnetic material. Fluorescence development can be checked with natural light, or with black light if necessary. The magnetic characteristics can be checked with a magnetic sensor. In addition, information (fixed information) can be recorded in advance in the information receiving unit in order to display the contents of variable information.

[Article to which the label is applied]
The label with authenticity determination part of the present invention has high value when applied to various articles that need to identify authenticity. There are various articles that need to identify such authenticity, and the following can be exemplified.

  Examples of various articles that need to identify authenticity include ID certificates for identification (ID) of holders, cash vouchers, genuine products, and high-end brand products with prominent brands. The ID card is, for example, a passport, a driver's license, an insurance card, a book card (library lending card), or the like. A cash voucher is, for example, securities such as gift certificates or gift certificates, prepaid cards, and the like. Genuine products are parts, consumables, etc. for use in various devices and require genuine certification. Articles are used for electronic devices, electrical devices, computer products, printers, etc. Consumables, pharmaceuticals, chemicals, etc. High-end brand products include expensive products of famous brands such as watches, clothing, bags, jewelry, sports equipment, and cosmetics. Furthermore, media storing computer software, music software or video software can also be cited as various articles that require authenticity identification.

  Therefore, the label with authenticity determination part of this invention can be affixed on the above articles | goods themselves, or the case of those articles | goods. Alternatively, it can be applied as a tag to the above-mentioned article.

  Hereinafter, the present invention will be described with reference to examples. However, this invention is not limited to the aspect shown in the Example. Moreover, unless otherwise indicated, a part or% is a mass reference | standard.

[ Reference Example 1]
(1) Formation of light selective reflection layer (cholesteric liquid crystal layer) A transparent polyethylene terephthalate film (PET film) having a thickness of 16 μm is used as a base material, and a polymer cholesteric liquid crystal layer ink having the following composition is applied to one surface of the base material. The polymer cholesteric liquid crystal layer having a dry mass of 10 g / m ² was formed by irradiating with ultraviolet rays immediately after printing. The obtained cholesteric liquid crystal layer had light selective reflectivity that selectively reflected only the right circular deflection.
(Polymer cholesteric liquid crystal layer ink)
Cholesteric liquid crystal pigment (Wacker Chemie, HELICONE (registered trademark) HCXL) 30 parts Medium ink (The Inktec Co., Ltd., UV card) 70 parts

(2) Formation of hologram forming layer On the surface of the PET substrate opposite to the surface on which the cholesteric liquid crystal layer is provided, a transparent ultraviolet curable resin composition is applied, and the mold surface of the relief hologram replication mold is brought into contact with it. The relief hologram was formed by irradiating with ultraviolet rays and curing the transparent ultraviolet curable resin composition. As a result, a hologram forming layer having a thickness of 2 μm was formed.

(3) Formation of reflective pattern layer On the surface on which the relief hologram was formed, printing was performed on a portion other than the portion where the reflective pattern layer was desired to be formed by a gravure printer using a water-soluble gravure ink. Then, when Al was vapor-deposited on the entire printed surface and washed with water, the Al vapor-deposited layer on the water-soluble ink layer was removed together with the water-soluble ink layer. Thereby, the laminated body in which the reflective pattern layer with a thickness of 400 mm was formed was obtained.

(4) Production of thread paper An adhesive layer having a dry mass of 2 g / m ² is applied to the surface of the laminate having the reflective pattern layer using an ethylene-vinyl acetate copolymer adhesive having a glass transition temperature of 30 ° C. Formed. Further, on the cholesteric liquid crystal layer, an adhesive layer was provided in the same manner as described above to produce a thread original fabric. This raw fabric was cut into a width of 2 mm by a slitter machine, wound around a core, and formed into a roll shape.

  On a circular paper machine equipped with two tank bats, a predetermined size of tape is affixed on the same circumferential surface of the first cylinder cylinder, and the mesh is closed. As a paper layer, a paper layer (first paper layer) having holes of a predetermined size was formed at regular intervals. The second tank circular mesh cylinder was not subjected to the above-mentioned work, and a plain second paper layer was formed. Also, a thread unwinding device is installed between the first and second tank cylinders so that the thread overlaps the hole in the first paper layer. It was inserted in the direction that and touched. At this time, the cholesteric liquid crystal layer was positioned on the viewer side at the position of the hole in the first paper layer in a state where the first paper layer and the second paper layer were laminated.

The paper made by this paper machine was dried with a cylinder dryer (surface temperature of about 70 to 100 ° C.) and then machine calendared. As shown in FIG. 1, the above paper machine was used to obtain a thread paper in which the thread was formed on one side and the exposed portion and the covering portion were repeatedly formed. The dry weight of the first paper layer is 35 g / m ² , the dry weight of the second paper layer is 69 g / m ² , and in the state where the first paper layer and the second paper layer are laminated, the high-quality paper of 90 kg / sixth edition It became.

(5) Production of label A label is obtained by gravure printing so that the dry mass is 30 g / m ² using a strong adhesive pressure sensitive adhesive made of acrylic resin on the surface opposite to the surface where the thread of the thread paper is exposed. A pressure-sensitive adhesive layer is formed on the entire surface, and a commercially available release paper with a basis weight of 90 g / m ² coated with a silicone resin on a high-quality paper base is laminated on the pressure-sensitive adhesive layer as a release sheet. Further, a punching process was performed to produce a threaded label.

[Example 2]
A threaded label was produced in the same manner as in Reference Example 1 except that a vapor deposition layer having a thickness of 500 mm was formed on the entire surface of the laminate including the reflective pattern layer surface by vapor deposition of TiO ₂ .

[Example 3]
A method similar to that of Example 2 except that the cholesteric liquid crystal layer was formed by applying polyvinyl alcohol to a TAC film and performing a rubbing treatment, and that a hologram forming layer and a reflective layer were sequentially laminated on the cholesteric liquid crystal layer. in, TAC film, a polyvinyl alcohol layer (orientation layer), the cholesteric liquid crystal layer, the hologram forming layer, to obtain a laminate having a reflective pattern layer and T iO ₂ layer in this order.
On the TiO ₂ layer of the laminate, an adhesive layer having a dry mass of 2 g / m ² was formed using an ethylene-vinyl acetate copolymer adhesive having a glass transition temperature of 30 ° C. to prepare a thread original fabric. This raw fabric was cut into a width of 2 mm by a slitter machine, wound around a core, and formed into a roll shape.
The above thread is superimposed on the surface of the tack paper (base is high-quality paper-based 55kg / sixth edition, the back side is adhesive-coated, with release paper attached) so that the adhesive layer and the surface of the tack paper are in contact with each other. Thermal lamination was performed. This threaded tack paper was punched to produce a label.

[Example 4]
Except for sequentially laminating a hologram forming layer and a reflective layer in the cholesteric liquid crystal layer in the same manner as in Example 2, PET film, a cholesteric liquid crystal layer, the hologram forming layer, a reflective pattern layer and T iO ₂ layers this The laminated body which has in order was obtained.
On the TiO ₂ layer of the laminate, an adhesive layer having a dry mass of 2 g / m ² was formed using an ethylene-vinyl acetate copolymer adhesive having a glass transition temperature of 30 ° C. to prepare a thread original fabric. This raw fabric was cut into a width of 2 mm by a slitter machine, wound around a core, and formed into a roll shape.
The above thread is superimposed on the surface of the tack paper (base is high-quality paper-based 55kg / sixth edition, the back side is adhesive-coated, with release paper attached) so that the adhesive layer and the surface of the tack paper are in contact with each other. Then, heat and pressure were applied to transfer the polymer cholesteric liquid crystal layer of the thread to the tack paper in a stripe shape (stripe transfer), and then the PET film was peeled off from the cholesteric liquid crystal layer. Thereafter, the tack paper with the thread was punched to produce a label.

[Example 5]
In Examples 1 to 4, in the middle of the production of the label with a thread, as shown in FIG. The “name” and the frame line were formed in advance. After the label is formed, a thermal transfer printer using the thermal transfer sheet having the fluorescent ink layer (fluorescent pink) described in the examples of JP-A-2005-178204 in the date entry column and the name entry column is shown in FIG. As shown in FIG. 4, individual data as variable information 7 was printed.

The labels with authenticity determination units (threads) obtained in Reference Example 1 and Examples 2 to 5 are obtained by integrating the base material and the authenticity determination unit and have very high anti-counterfeiting properties. It was. In the label obtained in Reference Example 1, since the Al reflective layer was patterned, the color changing effect of the cholesteric liquid crystal layer could be easily confirmed in the portion where the Al reflective layer was not formed. In the labels obtained in Examples 2 to 4, since the visible light transmitting TiO ₂ layer is disposed as the reflective layer under the Al reflective layer, it is easy to confirm the color variable effect of the cholesteric liquid crystal layer. The pattern of the hologram could be confirmed clearly on the entire surface. As described above, the labels obtained in Examples 1 to 5 can be easily determined by visually observing the authenticity determination unit. In addition, the authenticity using a tool (a right circular polarizing plate or a left circular polarizing plate) is used. False judgment was possible. In addition to the effects obtained with the labels of Reference Example 1 and Examples 2 to 4 , the printed label with authenticity determination unit of Example 5 is printed with individual data that is variable information, and has higher anti-counterfeiting properties. Furthermore, a clear fluorescent color could be observed on the printed part, and the anti-counterfeiting property was very high. These labels can be affixed to various articles and used for authenticity determination.

An application example of the authenticity determination unit to the base material will be shown. An application example of the authenticity determination unit to the base material will be shown. An application example of the authenticity determination unit to the base material will be shown. An application example of the authenticity determination unit to the base material will be shown. A specific example of the layer configuration of the authenticity determination unit will be shown. It is explanatory drawing of the aspect which has a two-layer light selective reflection layer through a phase difference layer. An example of the pattern of a reflective pattern layer is shown. An example of a combination of a hologram pattern and a reflective layer pattern is shown. It is explanatory drawing of patterning of a reflective layer. It is explanatory drawing of patterning of a reflective layer. The variation of reflection layer lamination is shown.

Claims (4)

A label base material, and a label having an authenticity determination portion and an information receiving portion on at least a part of one surface of the base material, wherein the authenticity determination portion is formed from the label base material side by a reflective layer and a hologram. layer and having a light selective reflection layer having light selective reflecting for reflecting either one of left circular polarized light and right circularly polarized light of the incident light in this order, information receiving unit, the individual information is fluorescence is variable data, A layer printed using a color transfer ribbon or magnetic material transfer ribbon, and the reflective layer is a vapor deposition having a refractive index different from that of the reflective pattern layer made of an aluminum vapor deposition layer and the material forming the hologram forming layer. The label comprising a vapor-deposited layer having visible light permeability formed by vapor-depositing a material. The label according to claim 1, wherein the vapor deposition material is selected from the group consisting of TiO ₂ and ZnS. The label according to claim 1 or 2, wherein the light selective reflection layer is a cholesteric liquid crystal layer. The label according to any one of claims 1 to 3 , wherein the authenticity determination unit is a thread.