JP4924087B2 - INTERMEDIATE TRANSFER RECORDING MEDIUM, INFORMATION RECORDING METHOD USING THE SAME, INFORMATION RECORDING MANUFACTURING METHOD, AND AUTHENTICITY JUDGING METHOD - Google Patents

Description

  The present invention relates to an intermediate transfer recording medium used for recording information on a transferred material by temporarily recording information such as characters and images on the receiving layer and then transferring the received layer to the transferred material, The present invention also relates to an information recording method using the intermediate transfer recording medium and a method for manufacturing an information recording body.

  The intermediate transfer recording medium is used for temporarily recording information such as characters and images on a receiving layer, and then transferring the receiving layer to a transfer medium to form a printed material. According to the intermediate transfer recording medium, it is possible to record information on a base material in which it is difficult for the color material to shift and to form a high-quality image directly (for example, see Patent Document 1).

Further, according to the intermediate transfer recording medium, it is possible to form an image such as a character or a face photograph required for the receiving layer in advance and then form an image on the transfer target by subsequent transfer. Furthermore, necessary information such as a signature is preliminarily filled in or printed on the transfer material, and then the receiving layer on which images such as characters and photographs are formed is transferred from the intermediate transfer recording medium. It is also possible to record composite information. Therefore, in recent years, the intermediate transfer recording medium has been widely used for the production of a printed matter including identification information such as a passport and individual information such as a credit card / ID card (for example, see Patent Document 2).
Japanese Patent No. 2848394 Specification Japanese Patent Laid-Open No. 11-263079

  A printed matter such as a passport or a credit card as described above is required to have security, that is, high reliability and safety that is difficult to forge or tamper. For this reason, for example, Patent Document 2 proposes that a hologram be provided in the transfer portion in order to prevent forgery and falsification by copying. However, in recent years, forgery / falsification means have become more sophisticated, and more effective forgery / falsification prevention means have been demanded.

  Therefore, an object of the present invention is to provide means for effectively preventing forgery / tampering.

  As a result of intensive studies to achieve the above object, the present inventors have provided a light selective reflection layer that selectively reflects right or left circularly polarized light in the transfer portion, which makes it difficult to counterfeit / tamper. As a result, the present invention has been completed.

That is, according to the present invention, the transferred material is an authentic product due to a difference in appearance by being transferred onto the substrate and observed by overlapping the right circularly polarizing plate and the left circularly polarizing plate thereon. An intermediate transfer recording medium having a transfer portion that can be peeled off to determine whether there is light, and the transfer portion reflects either left circularly polarized light or right circularly polarized light in incident light. And an information receiving layer, and an intermediate transfer recording medium having a base material, a light selective reflecting layer, a hologram forming layer, a reflecting layer, and an information receiving layer in this order .

Furthermore, according to one aspect of the present invention, the intermediate transfer recording medium in which the light selective reflection layer is a cholesteric liquid crystal layer; the intermediate transfer recording medium in which the base material is a stretched film; and the light selective reflection layer is adjacent to the base material. The intermediate transfer recording medium disposed; and the transfer section having the release layer on the surface adjacent to the base material; the intermediate transfer further including an alignment layer between the light selective reflection layer and the base material The intermediate transfer recording medium in which the orientation layer is a release layer; the transfer part has the adhesive layer on the outermost surface opposite to the substrate side; and the information receiving layer is an adhesive layer the intermediate transfer recording medium; anti picolinimidate is the intermediate transfer recording medium comprising a reflective pattern layer; wherein the continuous pattern is formed by the pattern formed by the reflective pattern layer with a pattern formed by the hologram forming layer intermediate transfer recoding media; Picolinimidate the above intermediate transfer recording medium further comprises a visible light transmissive reflection layer, it is provided.

Furthermore, the present invention provides an information recording method for recording information on a transfer medium by transferring the transfer part of the intermediate transfer recording medium to the transfer medium; transferring the transfer part of the intermediate transfer recording medium to the transfer medium A method for producing an information recording body comprising : an outer appearance by observing a right circularly polarizing plate and a left circularly polarizing plate superimposed on each of the transfer parts of the transferred body onto which the transfer part of the intermediate transfer recording medium has been transferred The authenticity determination method is characterized in that it is determined that the transferred object is a genuine product based on the difference .

  Since the intermediate transfer recording medium transfers information to the transfer target after recording information on the information receiving layer, it is difficult to tamper with the information. In addition, since the light selective reflection layer is difficult to obtain materials and has a high production technique, it is difficult to forge and tamper. Furthermore, having a light selective reflection layer also has an effect of preventing forgery and falsification by copying.

Hereinafter, the present invention will be described in more detail.
The intermediate transfer recording medium of the present invention has a transfer part on a substrate in a peelable manner. The transfer unit includes a light selective reflection layer having an optical selective reflectivity that reflects either left circularly polarized light or right circularly polarized light in the incident light, and an information receiving layer, and the light selective reflective layer includes a base Located between the material and the information receiving layer.
In the present invention, the “intermediate transfer recording medium” refers to a layer on which information such as characters and images is recorded (accepted) or a layer on which information is recorded (accepted) when in use. This refers to a medium that can be used to produce an information recording medium by transferring it to a transfer medium, and the “transfer section” is finally obtained by transferring the intermediate transfer recording medium of the present invention to the transfer medium. The portion existing on the recorded information recording medium. “Peelable” means an adhesive property that can separate the substrate and the transfer portion when the intermediate transfer recording medium of the present invention is transferred to the transfer target, and the transfer portion is disposed on the substrate. That means. In the present invention, “visible light transparency” means that the transmittance of visible light (wavelength 380 nm to 780 nm) is, for example, 50% or more.

The intermediate transfer recording medium of the present invention has a light selective reflection layer having a light selective reflection property that reflects either left circularly polarized light or right circularly polarized light in incident light in a transfer portion. The light selective reflection layer is positioned on the information receiving layer in a state where it is transferred to the transfer target. 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. It cannot be visually discriminated that the appearance is different depending on the applied circularly polarizing plate. 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, forgery and falsification due to copying can be effectively prevented or suppressed by having the light selective reflection layer. Thus, it is possible to provide an intermediate transfer recording medium that is extremely effective in preventing forgery and tampering. Furthermore, since the information recording body produced using the intermediate transfer recording medium of the present invention has an appearance that varies depending on the type of the circularly polarizing plate, there is also an advantage that authenticity determination by the circularly polarizing plate can be performed.
Next, details of each layer included in the intermediate transfer recording medium of the present invention will be described.

As the base material, a base film usually used for an intermediate transfer recording medium can be used. The material can be selected according to the purpose of use and is not limited. However, considering durability and the like, a plastic substrate is preferable. Preferred materials include polyethylene terephthalate (PET), polycarbonate, polyvinyl alcohol, polysulfone, polyethylene, polypropylene, polystyrene, polyarylate, diacetylcellulose, polyethylene-ethylvinyl alcohol, and other unstretched films, triacetylcellulose (TAC), etc. A film can be illustrated. Moreover, the composite film which laminated | stacked 2 or more types of these materials can also be used. The thickness of the base material can be appropriately selected depending on the material so that the strength, heat resistance, etc. thereof are appropriate, and usually a thickness of about 1 to 100 μm is preferably used. Also, when transferring the transfer part to the transfer medium using an intermediate transfer recording medium, in order to prevent the base film from being fused with a heating device such as a thermal head and to improve the slidability, the base film A known back surface layer may be provided on the surface opposite to the transfer portion side, if necessary.
As will be described later, when the light selective reflection layer is a cholesteric liquid crystal layer and the cholesteric liquid crystal layer is directly laminated on the base material, the base material serves as an alignment film by using a stretched film as the base material. At the same time, the substrate and the transfer portion (light selective reflection layer) can be peeled without the peeling layer. A preferable base material in terms of the function as the alignment film and the peelability includes a polyethylene terephthalate (PET) film.

The release layer transfer part can also have a release layer on the surface adjacent to the base material so that the base material and the transfer part can be peeled off. The release layer can easily release the transfer part from the substrate, and can serve as a protective layer as the outermost surface layer of the transfer part transferred to the transfer target. However, as described above, depending on the type of base material, the transfer part may be peeled from the base material without forming a release layer.

  The release layer can be formed from, for example, an acrylic skeleton resin, a vinyl chloride-vinyl acetate copolymer, a mixture of cellulose acetate and a thermosetting acrylic resin, a melamine resin, a nitrocellulose resin, and a polyethylene wax. It is preferable that the main component is an acrylic skeleton resin. Moreover, the adhesive force of a peeling layer and a base material can also be adjusted by using a polyester resin etc. For the release layer, for example, an acrylic skeleton resin and a polyester resin are dissolved or dispersed in an appropriate solvent to prepare a release layer coating solution, and this is applied to a base film with a gravure printing method, a screen printing method or a gravure plate. It can be formed by applying and drying by means such as the reverse coating method used.

  The release layer can also be formed using a releasable material. In this case, usually, a releasable material and a binder resin are used in combination. As the binder resin, acrylic resins such as polymethyl methacrylate, polyethyl methacrylate, and polybutyl acrylate which are thermoplastic resins, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, polyvinyl alcohol, polyvinyl butyral, etc. Vinyl-based resins, cellulose derivatives such as ethyl cellulose, nitrocellulose, and cellulose acetate, unsaturated polyester resins that are thermosetting resins, polyester resins, polyurethane resins, aminoalkyd resins, and the like can be used. As the releasable material, waxes, silicone waxes, silicone resins, melamine resins, fluorine resins, fine powders of talc and silica, lubricants such as surfactants and metal soaps, and the like can be used. The release layer is prepared by dissolving or dispersing the above resin in an appropriate solvent to prepare a release layer coating solution, and this is applied to the substrate film using a gravure printing method, a screen printing method or a gravure plate. It can be formed by applying and drying by means such as a coating method. The thickness of the release layer after drying is usually 0.1 to 10 μm. Further, when the light selective reflection layer is a cholesteric liquid crystal layer and an alignment layer is provided between the light selective reflection layer and the substrate for alignment of liquid crystal molecules, the alignment film may function as a release layer.

Light-selective reflection layer The light-selective reflection layer only needs to have a light-selective reflectivity that reflects either left circularly polarized light or right circularly polarized light in incident light, and is preferably a cholesteric liquid crystal layer. Further, in order to make it possible to visually identify information recorded in the information receiving layer, those having visible light permeability are preferable. 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, a 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 or a difference in thickness. The pattern layer can be formed using various printing methods.

  The light selective reflection layer may be formed of 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. The pattern layer can be formed using various printing methods.

  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 phase difference. For example, a transparent film, a nematic liquid crystal layer, or a nematic It can be comprised with the laminated body of a liquid crystal layer and 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. Details of the alignment film will be described later.

  As the transparent film, those having high mechanical strength and those having solvent resistance and heat resistance capable of withstanding processing when producing an intermediate transfer recording medium 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 layer can be laminated on one side or both sides of the retardation layer as necessary. Details of the alignment layer will be described later. 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.

Alignment layer In order to align liquid crystal molecules in the light selective reflection layer and impart desired light reflectivity, an alignment layer is formed between the substrate and the light selective reflection layer, on one side or both sides of the retardation layer, etc. You can also.
The alignment layer may be any material as long as it can be generally used as an alignment film, but preferably has visible light permeability so that information recorded in the information receiving layer can be visually identified. As the alignment layer material, for example, polyvinyl alcohol resin (PVA), polyimide resin, or the like can be used. The alignment layer 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. In the case of the structure of base material / alignment layer / light selective reflection layer, if an alignment layer with poor adhesion to the light selective reflection layer is selected, the orientation layer is peeled off from the transfer portion together with the base material during transfer to the transfer target. can do. In this case, a light selective reflection layer appears on the outermost surface of the transfer portion transferred to the transfer medium. On the other hand, in the above configuration, if an alignment layer with poor adhesion to the substrate is selected, the alignment layer functions as a release layer, and when the substrate is peeled off during transfer to the transfer object, it is transferred to the transfer object. An alignment layer appears on the outermost surface of the transferred portion. In this case, the alignment layer can also serve as a protective layer. However, since the liquid crystal layer can align the liquid crystal molecules in the layer without the alignment layer depending on the physical properties of the lower layer, the alignment layer 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.

(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.

In the intermediate transfer recording medium of the present invention, the information receiving layer and the light selective reflection layer can be directly laminated, and both layers can be arranged adjacent to each other, but an arbitrary layer is provided between the information receiving layer and the light selective reflection layer. It can also be provided. By providing a hologram (hologram forming layer and reflection layer) between the information receiving layer and the light selective reflection layer, the forgery / falsification prevention effect by the hologram as well as the forgery / falsification prevention effect by the hologram can be obtained. Security can be further improved. Specifically, the intermediate transfer recording medium of the present invention can have a light selective reflection layer, a hologram forming layer, a reflection layer, and an information receiving layer in this order in the transfer portion.
Below, each layer which forms a hologram is demonstrated.

Hologram-forming layer As the hologram-forming layer, a known hologram-forming layer can be used. In order to make it possible to visually identify information recorded in the information receiving layer, a material 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. These resins may be used alone or in combination of two or more kinds 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 in a pattern by a similar method is also included in the hologram forming layer. A combination of the hologram forming layer and the diffraction grating forming layer may be called an optical diffraction structure layer. The thickness of the hologram forming layer is not particularly limited, but is, for example, about 0.1 to 20 μm.

Variations of the reflective layer reflection layer shown in FIG. The reflection layer may be provided with a substantially uniform film thickness between the light selective reflection layer and the information receiving layer as shown in FIG. 7A, and a pattern as shown in FIGS. 7B to 7E. It may be provided in a shape. Further, as shown in FIGS. 7C to 7E, a pattern-like reflective layer (reflective pattern layer) and a visible light transmissive reflective layer may be combined.
When the reflective layer is formed from a material such as a metal that reflects light, an opaque type hologram can be obtained, and when formed from a material having visible light transparency, a transparent type hologram can be obtained.
In the case of a reflective layer having a substantially uniform film thickness as shown in FIG. 7A, a visible light transmissive reflective layer is provided in order to make it possible to visually identify information recorded in the information receiving layer. preferable.
In the embodiment shown in FIGS. 7B to 7E, when an opaque reflective pattern layer is formed, it is possible to confirm information recorded in the information receiving layer from a portion where the reflective pattern layer is not laminated. It is. In the intermediate transfer recording medium of the present invention, a visible light transmissive reflective pattern layer and a visible light transmissive reflective layer can be combined. In this case, it is possible to visually recognize the pattern of the reflective pattern layer by changing the refractive indexes of the reflective pattern layer and the visible light transmissive reflective layer.

  As metal materials for forming the reflective layer, Al, Cr, Ti, Fe, Co, Ni, Cu, Ag, Au, Ge, Mg, Sb, Pb, Cd, Bi, Sn, Se, In, Ga Alternatively, a metal such as 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 layer having visible light permeability, 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.

  When the reflective layer is patterned, it is easy to see the hologram image in the part where the reflective pattern layer is laminated in the lower layer, and characters and images recorded in the information receiving layer in the part where the reflective pattern layer is not laminated in the lower layer It becomes easy to confirm the information. In addition, since the technology for patterning the reflective layer is extremely advanced, it is difficult to forge or tamper the intermediate transfer recording medium having the reflective pattern layer and the information recording body produced using the intermediate transfer recording medium. is there. Furthermore, the pattern formed by the hologram forming layer and the pattern formed by the reflective pattern layer are combined to have a complicated appearance and excellent design.

  An example of the pattern of the reflective pattern layer is shown in FIG. As shown in FIG. 1A, 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). It may be a striped pattern that is arranged with an equal interval, or, as shown in FIG. 1B, the reflective layer 5 has a geometric shape (rectangular shape and star shape in the drawing). 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. 4A, for example, a continuous picture is formed by a picture shown by the hologram forming layer and a picture shown by the reflective pattern layer, preferably both pictures. Means that one continuous picture is formed. 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 reflective pattern layer do not match. As an out-of-tune mode, for example, as shown in FIG. 4B, 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. In FIG. 4, information such as characters and images recorded in the information receiving layer located in the lower layer is omitted.

  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. 1C and 1D, the reflective pattern layer may be laminated in a fine pattern. In this case, as shown in FIG. 1 (c), the pattern (fine pattern) is a reflection layer made of a line having a finite width that faces from the left side toward the upper side toward the right side toward the upper side. The line pattern may be a fine pattern arranged at a pitch of about twice, or as shown in FIG. 1 (d), a circular or square reflective layer may be formed. 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. 1 (c) or (d), an outer shape square) 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%. When the reflective pattern layer is formed in a fine pattern, the pattern of the hologram can be confirmed in the area where the fine pattern exists, that is, in the external pattern, and the color of the light selective reflection layer changes depending on the viewing angle. You can also confirm that you want to.

  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.

Below, based on FIG. 2 and 3, an example of the method of forming a reflective pattern layer by forming a reflective layer in the whole surface, and removing an unnecessary part is demonstrated.
FIG. 2 is an explanatory diagram of a method for patterning a reflective layer using a water-soluble resin pattern. In FIG. 2 and FIG. 3 quoted in the following description, layers other than the hologram forming layer, such as a light selective reflection layer and a latent image pattern layer, are omitted.

As shown in FIG. 2 (a), first, a hologram forming layer having hologram fine irregularities on its lower surface is produced.
Next, as shown in FIG.2 (b), a water-soluble resin pattern is formed in the part where the reflective metal layer of the surface in which the fine unevenness | corrugation of the hologram formation layer was 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.2 (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. 2D, the portion of the reflective layer where the water-soluble resin pattern was not laminated remains, and the reflective layer is formed in a pattern.

FIG. 3 is an explanatory diagram of a method for patterning a reflective layer using a resist pattern.
First, as shown in FIG. 3A, a hologram forming layer having hologram fine irregularities on its lower surface is formed.
Next, as shown in FIG. 3B, a reflective layer is formed on one surface of the hologram forming layer on which fine irregularities are formed.
Thereafter, as shown in FIG. 3C, 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. 3D, the 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.

  When the reflective layer is a combination of a reflective pattern layer and a visible light transmissive reflective layer, as shown in FIG. 7D, the visible light transmissive reflective layer is patterned in a portion where the reflective pattern layer is not laminated. It is also possible to provide it in a shape. From the viewpoint of ease of manufacture, as shown in FIG. 7C, a hologram forming layer, a reflective pattern layer, and a visible light transmissive reflective layer are laminated in this order, and the entire surface of the laminate including the reflective pattern layer is laminated. It is preferable to form a visible light transmissive reflective layer.

  The visible light transmissive reflective layer is reflective by a vacuum deposition method, a sputtering method, an ion plating method, a printing method, etc., using the various materials described above as a reflective layer material for forming a transparent type hologram. It can be manufactured by performing a film forming process on the surface of the laminate on which the pattern layer is formed. In this case, the film thickness of the visible light transmissive reflective layer is not particularly limited, but the film thickness on the reflective pattern layer may be, for example, 1 to 10,000 nm.

Information Receiving Layer The information receiving layer is a layer that temporarily receives information such as characters and images to be finally printed on the transfer medium. In the present invention, the “information receiving layer” of the intermediate transfer recording medium includes a layer in which information is recorded before information recording and when the intermediate transfer recording medium is used, in addition to a layer in which information has already been recorded. Shall be.

  The method of recording information on the information receiving layer is not particularly limited, but information reception is usually performed by an inkjet method or a thermal transfer method from a thermal transfer sheet having a color material layer by thermal transfer such as sublimation transfer or melt transfer. Information such as characters and images is transferred to the layer. Then, by transferring the transfer portion of the intermediate transfer recording medium onto which the information has been transferred to the transfer target, it is possible to finally record the information on the transfer target and form a printed matter.

  As a material for forming the information receiving layer, a conventionally known resin material that can easily accept a coloring material such as a sublimation dye or a hot-melt ink can be used. For example, polyolefin resin such as polypropylene, halogenated resin such as polyvinyl chloride or polyvinylidene chloride, vinyl acetate, vinyl chloride-vinyl acetate copolymer, ethylene-vinyl acetate copolymer, or vinyl such as polyacrylate Resin, polyester resin such as polyethylene terephthalate or polybutylene terephthalate, polystyrene resin, polyamide resin, copolymer resin of olefin such as ethylene or propylene and other vinyl polymer, cellulose resin such as ionomer or cellulose diastase, Examples thereof include polycarbonate, and vinyl chloride resin, acrylic-styrene resin, or polyester resin is particularly preferable.

  When the information receiving layer is transferred to the transfer medium via the adhesive layer, the adhesive property of the receiving layer itself is not necessarily required, but the information receiving layer is located on the outermost surface opposite to the substrate side and is bonded. In the case of transferring to a transfer medium without passing through a layer, an adhesive layer is provided as an information receiving layer. In this case, the information receiving layer is preferably formed using a resin material having heat-sensitive adhesive properties such as vinyl chloride-vinyl acetate copolymer. On the other hand, when an adhesive layer is provided separately from the information receiving layer, a heat-sensitive adhesive (heat seal material), an adhesive, or the like can be used as an adhesive for forming the adhesive layer.

  For the information receiving layer, one or more materials selected from the above-mentioned materials and various additives as necessary are added and dissolved or dispersed in a suitable solvent such as water or an organic solvent. A working solution is prepared, and this is formed by applying and drying a laminate having a light selective reflection layer on a substrate by means of a gravure printing method, a screen printing method or a reverse coating method using a gravure plate. be able to. Alternatively, the receiving layer coating solution may be applied on a separately prepared release paper, and the information receiving layer formed on the release paper and the laminate may be bonded together. The thickness of the information receiving layer is, for example, 1 to 10 μm in a dry state. When an adhesive layer is provided separately from the information receiving layer, the thickness of the adhesive layer can be set to, for example, 0.5 to 20 μm. Further, the intermediate transfer recording medium of the present invention may have an arbitrary layer such as a known functional layer in addition to the above-described layers.

Information recording method, information recording body manufacturing method Further, the present invention relates to an information recording method for recording information on a transfer medium by transferring a transfer portion of the intermediate transfer recording medium of the present invention to the transfer medium. In the information recording method of the present invention, information on the information receiving layer included in the transfer portion of the intermediate transfer recording medium is transferred onto the transfer body together with the transfer portion, thereby recording information on the transfer body.
Furthermore, the present invention relates to a method for producing an information recording body including transferring a transfer portion of the intermediate transfer recording medium of the present invention to a transfer medium. Here, the “information recording body” includes various types of information such as characters and images, and can take various forms including those exemplified for the shape and application of the transfer target described later.

  The transfer medium to which the intermediate transfer recording medium of the present invention is applied is not particularly limited. For example, natural fiber paper, coated paper, tracing paper, plastic film, glass, metal, ceramics, wood, cloth, etc. Good. Usually, since heat is applied at the time of transfer, a transfer target made of a material that is not deformed by heat at the time of transfer is preferable.

  Regarding the shape and application of the transferred object, stock certificates, securities, certificates, passbooks, boarding tickets, car horse tickets, stamps, stamps, appreciation tickets, admission tickets, tickets, etc., cash cards, credit cards, prepaid cards, Cards such as members cards, greeting cards, postcards, business cards, driver's licenses, IC cards, optical cards, cases such as cartons, containers, bags, forms, envelopes, tags, OHP sheets, slide films, bookmarks, Calendars, posters, brochures, menus, passports, POP supplies, coasters, displays, nameplates, keyboards, cosmetics, wristwatches, lighters and other accessories, stationery, report paper and other stationery, building materials, panels, emblems, keys, cloth, clothing , Footwear, radio, TV, calculator, OA equipment, etc., various samples , Album, In addition, computer graphics output, medical image output, paper or the like narrowing plow such as thread paper, do not ask the kind. It is also possible to obtain an information recording body having composite information by printing predetermined information on the transfer body in advance and transferring the transfer portion from the intermediate transfer recording medium thereon.

  Information can be recorded on the transfer medium in the same manner as an information recording method using a normal intermediate transfer recording medium. Specifically, after the adhesive layer of the intermediate transfer recording medium is bonded to the transfer target, and then heat-pressed using a heat roll or the like, the transfer film is formed on the transfer target by peeling the base film. Information can be recorded by transcription. Although the heat pressure conditions at the time of transfer are not particularly limited, for example, the conditions may be 100 to 200 ° C., 100 to 1000 kPa, and 1 to 10 seconds. In this way, an information recording body on which desired information is recorded can be obtained.

  In addition, a threaded paper can be produced by forming a concave opening that does not serve as a through-hole in a sheet of paper, plastic, or the like so that the transfer portion transferred to the sheet can be seen from the opening. . For ease of application, the intermediate transfer recording medium is cut into a very narrow width (vertically long thread shape in FIG. 5), for example, about 0.5 mm to 5 mm. When laminating the layers, an opening is provided in the layer constituting the surface layer, and the opening is formed by peeling the substrate after applying the thread-like intermediate transfer recording medium between the sheet-like layers. The transfer part can be transferred onto the top. Specific examples of the information recording medium in which information is recorded on a sheet-like material using an intermediate transfer recording medium in this way include gold vouchers and other printed materials having economic value.

  Hereinafter, the present invention will be described with reference to examples. However, this invention is not limited to the aspect shown in the Example.

[ Reference Example 1]
(1) Formation of cholesteric liquid crystal layer A cholesteric liquid crystal ink is applied on a PET film (stretched film) and dried to express a cholesteric liquid crystal phase. A cholesteric liquid crystal layer was formed.

(2) Formation of an information receiving layer (also used as an adhesive layer) After applying an information receiving layer coating liquid having the following composition on the cholesteric liquid crystal layer formed in (1) above, a thermal transfer sheet having a color material layer is overlaid. An image was printed using a thermal head to form an information receiving layer having a thickness of 2.0 μm. As a result, an intermediate transfer recording medium having a layer structure of substrate / cholesteric liquid crystal layer / information receiving layer (also used as an adhesive layer) was produced.
(Information Receiving Layer Coating Solution)
Vinyl chloride-vinyl acetate copolymer 40 parts by weight Acrylic silicone 1.5 parts by weight Methyl ethyl ketone 50 parts by weight Toluene 50 parts by weight

[ Reference Example 2]
The substrate / cholesteric liquid crystal layer 1 / the same as in Example 1 except that the cholesteric liquid crystal for pattern printing was gravure-printed on the cholesteric liquid crystal layer and information such as patterns and characters was added before the information receiving layer was formed. An intermediate transfer recording medium having a layer structure of cholesteric liquid crystal layer 2 (pattern layer) / information receiving layer (also used as an adhesive layer) was obtained.

[Example 3]
In addition to providing the hologram between the cholesteric liquid crystal layer and the information-receiving layer by the following method similar manner as in Reference Example 1, the substrate / cholesteric liquid crystal layer / hologram forming layer / reflective layer (visible light transmission, An intermediate transfer recording medium having a layer configuration of (overall coating) / information receiving layer (also used as an adhesive layer) was produced.
By applying a transparent ultraviolet curable resin composition on the cholesteric liquid crystal layer and irradiating the ultraviolet ray with the mold surface of the relief hologram replication mold in contact with it, the transparent ultraviolet curable resin composition is cured, A relief hologram was formed to form a hologram forming layer having a thickness of 2 μm. Thereafter, TiO ₂ was deposited on the entire surface of the relief hologram, thereby forming a visible light transmissive reflective layer having a thickness of 400 nm.

[Example 4]
The substrate / cholesteric liquid crystal layer 1 was prepared in the same manner as in Example 3 except that the cholesteric liquid crystal for pattern printing was gravure-printed on the cholesteric liquid crystal layer before forming the hologram forming layer, and information such as patterns and characters was added. An intermediate transfer recording medium having a layer structure of / cholesteric liquid crystal layer 2 (pattern layer) / hologram forming layer / reflective layer (visible light transmission, entire surface coating) / information receiving layer (also serving as an adhesive layer) was obtained.

[Example 5]
A substrate / cholesteric liquid crystal layer / hologram forming layer / reflective pattern layer (visible light transmission) / in the same manner as in Example 3 except that a reflective pattern layer was formed on the hologram forming layer by the following procedure. An intermediate transfer recording medium having a layer structure of an information receiving layer (also used as an adhesive layer) was obtained.
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 to be formed by a gravure printer using a water-soluble gravure ink. Thereafter, when TiO ₂ vapor deposition was performed on the entire surface of the hologram forming layer including the printing surface and then washed with water, the TiO ₂ vapor deposition layer on the water-soluble ink layer was removed together with the water-soluble ink layer. As a result, a reflective pattern layer having a thickness of 400 nm was formed.

[Example 6]
A laminate in which a cholesteric liquid crystal layer and a hologram forming layer were laminated on a substrate was obtained in the same manner as in Example 3.
Using a water-soluble ink for silk printing on the surface of the hologram forming layer, printing was performed on the entire surface other than the portion where the reflective pattern layer was to be formed so as to synchronize with the pattern of the hologram forming layer by a multicolor silk printing machine. Thereafter, when TiO ₂ vapor deposition was performed on the entire surface of the hologram forming layer including the printing surface and then washed with water, the TiO ₂ vapor deposition layer on the water-soluble ink layer was removed together with the water-soluble ink layer. As a result, a reflective pattern layer having a thickness of 500 mm patterned to synchronize with the pattern of the hologram forming layer was obtained.
An information image-receiving layer coating solution made of an acrylic resin was applied to the reflective pattern layer with a thickness of 10.0 μm, and an image was printed using an ink jet printer. . Next, an adhesive layer coating solution made of vinyl chloride / vinyl acetate copolymer resin was applied on the information receiving layer to form an adhesive layer having a thickness of 2.0 μm. As a result, an intermediate transfer recording medium having a layer structure of substrate / cholesteric liquid crystal layer / hologram forming layer / reflective pattern layer (visible light transmission) / information receiving layer / adhesive layer was obtained.

[Example 7]
A laminate in which a cholesteric liquid crystal layer and a hologram forming layer were laminated on a substrate was obtained in the same manner as in Example 3.
Al deposition was performed on the surface of the hologram forming layer. Printing was performed on a portion where the reflective pattern layer was to be formed so as to be in synchronization with the pattern of the hologram forming layer using an etching resist ink on the Al deposition surface. Thereafter, when the printed sheet was alkali-etched with a 1% by mass sodium hydroxide solution, Al deposition remained in the portion where the resist ink layer was present, and Al deposition in other portions was removed. As a result, a reflective pattern layer having a thickness of 500 mm patterned to synchronize with the pattern of the hologram forming layer was obtained. Thereafter, an information receiving layer was formed on the resulting reflective pattern layer in the same manner as in Reference Example 1. As a result, an intermediate transfer recording medium having a layer configuration of substrate / cholesteric liquid crystal layer / hologram forming layer / reflective pattern layer (opaque reflective layer) / information receiving layer (also used as an adhesive layer) was obtained.

[Example 8]
Cholesteric liquid crystal was pattern printed on the cholesteric liquid crystal layer in the same manner as in Reference Example 2. A hologram forming layer was formed thereon by the same method as in Example 3.
Using a water-soluble ink for silk printing on the surface of the hologram forming layer, printing was performed on the entire surface other than the portion where the reflective pattern layer was to be formed so as to synchronize with the pattern of the hologram forming layer by a multicolor silk printing machine. Then, when Al was vapor-deposited on the entire surface of the hologram forming layer including the printing surface and then washed with water, the Al vapor-deposited layer on the water-soluble ink layer was removed together with the water-soluble ink layer. As a result, a reflective pattern layer having a thickness of 500 mm patterned to synchronize with the pattern of the hologram forming layer was obtained. An information receiving layer was formed thereon by the same method as in Reference Example 1. Thus, an intermediate transfer recording medium having a layer structure of substrate / cholesteric liquid crystal layer 1 / cholesteric liquid crystal layer 2 (pattern layer) / hologram forming layer / reflective pattern layer (opaque) / information receiving layer (also serving as an adhesive layer) is obtained. Obtained.

[Example 9]
In Example 5, the vapor deposition material was changed from TiO ₂ to Al, and a laminate having a cholesteric liquid crystal layer and a reflective pattern layer was formed on the substrate. A TiO ₂ vapor deposition was performed on the entire surface including the reflective pattern layer of this laminate to form a visible light transmissive reflective layer having a thickness of 700 mm. An information receiving layer was formed thereon by the same method as in Reference Example 1. As a result, an intermediate transfer recording medium having a layer structure of substrate / cholesteric liquid crystal layer / hologram forming layer / reflective pattern layer (opaque) / visible light transmissive reflective layer / information receiving layer (also used as an adhesive layer) was obtained.

[Example 10]
In Example 6, the deposition material was changed from TiO ₂ to Al, and a laminate having a cholesteric liquid crystal layer and a reflective pattern layer was formed on the substrate. A TiO ₂ vapor deposition was performed on the entire surface including the reflective pattern layer of this laminate to form a visible light transmissive reflective layer having a thickness of 700 mm. On this, an information receiving layer and an adhesive layer were sequentially formed in the same manner as in Example 6. Thus, an intermediate transfer recording medium having a layer structure of substrate / cholesteric liquid crystal layer / hologram forming layer / reflective pattern layer (opaque) / visible light transmitting reflective layer / information receiving layer / adhesive layer was obtained.

[Example 11]
In Example 7, the vapor deposition material was changed from TiO ₂ to Al, and a laminate having a cholesteric liquid crystal layer and a reflective pattern layer was formed on the substrate. A TiO ₂ vapor deposition was performed on the entire surface including the reflective pattern layer of this laminate to form a visible light transmissive reflective layer having a thickness of 700 mm. An information receiving layer was formed thereon by the same method as in Reference Example 1. As a result, an intermediate transfer recording medium having a layer structure of substrate / cholesteric liquid crystal layer / hologram forming layer / reflective pattern layer (opaque) / visible light transmissive reflective layer / information receiving layer (also used as an adhesive layer) was obtained.

[Example 12]
A cholesteric liquid crystal for pattern printing is gravure-printed between the cholesteric liquid crystal layer and the hologram forming layer, and information such as patterns and characters is added. The information receiving layer is replaced with the information receiving layer by the method described in Example 6 instead of the information receiving layer. Except for the point that the adhesive layer was formed sequentially, the same method as in Example 10 was used, and the base material / cholesteric liquid crystal layer 1 / cholesteric liquid crystal layer 2 (pattern) / hologram forming layer / reflective pattern layer (opaque) / visible light transmittance. An intermediate transfer recording medium having a layer structure of a reflective layer / information receiving layer (also used as an adhesive layer) was obtained.

[ Reference Example 3, Example 13]
After adhering the adhesive layer of the intermediate transfer recording medium obtained in Reference Examples 1 and 2 and Examples 3 to 12 (in the case where the information receiving layer also serves as the adhesive layer), the adhesive layer to each card substrate, Hot-pressed with a heat roll. Thereafter, the PET film was removed from the intermediate transfer recording medium. As a result, the transfer portion of the intermediate transfer recording medium was transferred onto the card substrate, and information was recorded on the card substrate. In the intermediate transfer recording media of Reference Examples 1 and 2 and Examples 3 to 12, cholesteric liquid crystal molecules could be aligned without providing an alignment layer. Moreover, the base material was able to be peeled from the cholesteric liquid crystal layer, without providing a peeling layer.
When the card substrate on which information was recorded using the intermediate transfer recording medium of Reference Example 1 was visually observed, the color change of the cholesteric liquid crystal layer could be visually recognized. When the right circular polarizing plate is stacked on this card substrate, it becomes bright and colored based on the helical pitch of the cholesteric liquid crystal layer. When the left circular polarizing plate is stacked, no reflection occurs, so the entire card substrate looks dark. It was. Moreover, in the card | curd base material which recorded information using the intermediate transfer medium of the reference example 2, Example 4, 12, the pattern of the cholesteric liquid crystal layer formed in the pattern shape was visually recognizable visually.
In the card base material on which information was recorded using the intermediate transfer recording media of Examples 3 to 12, a hologram pattern also appeared, and the appearance was more complicated. In the card substrate on which information was recorded using the intermediate transfer recording media of Examples 6 to 8 and Examples 10 to 12 , a continuous pattern in which the pattern of the hologram forming layer and the pattern of the reflective pattern layer were synchronized was observed.
In the card base material on which information is recorded using the intermediate transfer recording media of Examples 9 to 12 in which the opaque reflective pattern layer and the visible light transmissive reflective pattern layer are combined, from the portion where the opaque reflective pattern layer does not exist in the lower layer The information recorded in the information receiving layer could be confirmed.

[Example 14]
Information recording was performed in the same manner as in Example 4 except that the card substrate was changed to paper.

An example of the pattern of a reflective pattern layer is shown. It is explanatory drawing of patterning of a reflective layer. It is explanatory drawing of patterning of a reflective layer. An example of a combination of a hologram pattern and a reflective layer pattern is shown. It is explanatory drawing of a thread | sled paper. It is explanatory drawing of the aspect which has a two-layer light selective reflection layer through a phase difference layer. A variation of the intermediate transfer recording medium having a hologram is shown. A variation of the intermediate transfer recording medium having a hologram is shown.

Claims (15)

In order to determine that the transferred object is an authentic product based on the difference in appearance due to the right circularly polarizing plate and the left circularly polarizing plate superimposed on each other and observed on the substrate. An intermediate transfer recording medium having a transfer part used for releasable,
The transfer unit has a light selective reflection layer having an optical selective reflection property that reflects either left circularly polarized light or right circularly polarized light in the incident light, and an information receiving layer, and
An intermediate transfer recording medium having a substrate, a light selective reflection layer, a hologram forming layer, a reflection layer, and an information receiving layer in this order . The intermediate transfer recording medium according to claim 1, wherein the light selective reflection layer is a cholesteric liquid crystal layer. The intermediate transfer recording medium according to claim 1, wherein the substrate is a stretched film. The intermediate transfer recording medium according to claim 1, wherein the transfer unit has a release layer on a surface adjacent to the substrate. An intermediate transfer recording medium according to any one of claims 1 to 4, further comprising an orientation layer between the light selective reflecting layer and the substrate. The intermediate transfer recording medium according to claim 5 , wherein the alignment layer is a release layer. The intermediate transfer recording medium according to claim 1, wherein the light selective reflection layer is disposed adjacent to the substrate. The intermediate transfer recording medium according to claim 1, wherein the transfer portion has an adhesive layer on the outermost surface opposite to the substrate side. 9. The intermediate transfer recording medium according to claim 8, wherein the information receiving layer is an adhesive layer. The intermediate transfer recording medium according to claim 1, wherein the reflective layer includes a reflective pattern layer. The intermediate transfer recording medium according to claim 10 , wherein a continuous pattern is formed by a pattern formed by the hologram forming layer and a pattern formed by the reflective pattern layer. Reflective layer intermediate transfer recording medium according to claim 10 or 11 further comprising a visible light-transmissive reflective layer. An information recording method for recording information on a transfer medium by transferring the transfer portion of the intermediate transfer recording medium according to any one of claims 1 to 12 to the transfer medium. A method for producing an information recording body, comprising: transferring a transfer portion of the intermediate transfer recording medium according to any one of claims 1 to 12 to a transfer target body. By observing the right circularly polarizing plate and the left circularly polarizing plate in an overlapping manner on the transfer portion of the transferred material onto which the transfer portion of the intermediate transfer recording medium according to any one of claims 1 to 12 has been transferred. An authenticity determination method, characterized in that, based on a difference in appearance, the transferred object is determined to be genuine.