JP2005335286A - Printing recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printing recording medium which has high forgery preventing properties and can surely prevent alteration of the contents recorded by printing and which does not require a high manufacturing cost and has high utility. <P>SOLUTION: In the constitution of the printing recording medium 1 wherein a discharge breakdown printing layer 4 and an optical variable layer 3 are laid on each other, the discharge breakdown printing layer 3 is broken down and removed by recording by printing and the optical variable layer 3 positioned in the ground is put in a state of being exposed and visible in the places where only printed portions 5 exist. In a preferable constitution, the optical variable layer 3 and the discharge breakdown printing layer 4 are laid on each other in this sequence at least in a portion on a base 2. This constitution has a very high forgery preventing properties and makes it very hard to alter the contents recorded by printing. By providing the optical variable layer 3 and the discharge breakdown printing layer 4 not wholly on the base 2, but partially thereon, the manufacturing cost can be held down and the printing recording medium 1 having high utility can be obtained. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a print recording medium that has high anti-counterfeiting properties, can reliably prevent tampering of printed and recorded contents, is not expensive to manufacture, and is highly practical.

  As a recording medium, a magnetic recording layer is provided on the surface of a substrate such as plastic, and magnetic information is recorded on the magnetic recording layer by a magnetic head or the like, and an electron donating usually colorless or light color on the substrate Is provided with a heat-sensitive recording layer consisting mainly of a dye precursor (leuco dye) and an electron-accepting developer, and the dye precursor and developer are instantaneously heated by heating with a thermal head, laser light, or the like. A thermal recording medium that reacts and produces a colored recording image, and further, discharge destruction in which information is recorded by forming a discharge destruction portion in a discharge destruction print recording layer by generating a discharge according to the recorded information by a recording pin. Recording media and the like are known.

  For example, as shown in Patent Documents 1 and 2, in order to visually confirm information recorded on a magnetic recording medium, recording such as thermal recording or discharge breakdown recording is performed on the medium in combination. . Recording methods such as thermal recording and discharge breakdown recording are simple and widespread methods. As a technique for imparting anti-counterfeiting properties to this, for example, Patent Document 3 is available. This is an information recording medium characterized in that the reflection layer constituting the reflection type relief hologram layer also serves as a discharge destruction printing layer, and printing is performed by destroying the metal reflection layer of the reflection type relief hologram which is difficult to forge. This improves anti-counterfeiting. However, in this case, there is a problem in that the use of the reflective relief hologram on the entire print recording area increases the manufacturing cost.

In order to improve the anti-counterfeiting property in the recording medium, various proposals have been made as described above. However, at present, no satisfactory one has been found as having high practicality.
JP 59-199284 A Japanese Patent Laid-Open No. 7-52546 JP-A-5-162487

  Therefore, in order to solve the above-described problems, the present invention has high anti-counterfeiting properties, can surely prevent alteration of printed and recorded contents, does not increase the manufacturing cost, and is practical. An object of the present invention is to provide a print recording medium having high accuracy.

  According to the first aspect of the present invention, in the print recording medium in which the discharge breakage printing layer and the optical variable layer are laminated, the discharge breakage printing layer is broken and removed by the print record, and only on the printed portion, It is characterized in that the optical variable layer that is positioned is exposed. The invention according to claim 2 is characterized in that the optically variable layer according to claim 1 and the discharge destruction printing layer are laminated in this order, and at least one of these layers is laminated on at least a part of the substrate. To do.

  A third aspect is characterized in that an adhesive layer is provided between the substrate according to the second aspect and the optical variable layer. According to a fourth aspect of the present invention, a protective layer is laminated on the discharge destruction printing according to any one of the first to third aspects. A fifth aspect is characterized in that a concealing layer is provided under the optically variable layer according to any one of the first to fourth aspects.

  The print recording medium of the present invention has a structure in which a discharge destruction printing layer and an optical variable layer are laminated, and the discharge destruction printing layer is destroyed and removed by printing recording, so that the optical recording medium located on the base only at the printing portion. The variable layer appears to be exposed. The optical variable layer and the electric discharge destruction printing layer are preferably laminated in this order on at least a part of the base material. The anti-counterfeiting property is very high, and the contents recorded and printed are very falsified. In addition, it is possible to reduce the manufacturing cost by providing the optical variable layer and the discharge destruction printing layer on the base material instead of the entire surface, and a highly practical print recording medium can be obtained. It was.

  FIG. 1A is a schematic diagram showing one embodiment of a print recording medium 1 of the present invention. An optical variable layer 3 and a discharge breakage print layer 4 are laminated on a substrate 2 in this order. Therefore, the optical variable layer 3 and the discharge destruction printing layer 4 have the same size, and both the optical variable layer 3 and the discharge destruction printing layer 4 are smaller than the entire surface of the substrate 2 surface. , Laminated on a part of the substrate 2. FIG. 1B is a schematic view showing another embodiment of the print recording medium 1 of the present invention. On the base material 2, the optical variable layer 3 and the discharge breakage print layer 4 are in this order. The size of the optical variable layer 3 is larger than the size of the discharge destruction printing layer 4, and the discharge destruction printing layer 4 is laminated on a part of the optical variable layer 3. The optical variable layer 3 is laminated on a part of the substrate 2.

  FIG. 1C is a schematic view showing another embodiment of the print recording medium 1 of the present invention. On the substrate 2, the optical variable layer 3 and the discharge breakage print layer 4 are laminated in this order. Then, the size of the optical variable layer 3 is smaller than the size of the discharge destruction printing layer 4, and the discharge destruction printing layer 4 is laminated so as to cover the entire optical variable layer 3. Further, the discharge breakage printing layer 4 is laminated not on the entire surface of the base material 2 but on a part of the surface of the base material 2.

  The print recording medium 1 shown in FIG. 1 is different from each other in the size of the optical variable layer 3 and the discharge breakage print layer 4 with respect to the size of the surface of the substrate 2, but all the states before print recording are performed. It is shown. On the other hand, FIG. 2 is a schematic diagram showing the states of both the print recording medium 1 of the present invention before and after printing. Before print recording, the print recording medium 1 is formed by laminating the discharge destruction printing layer 4 and the optical variable layer 3 on a part of the substrate 2, and both the discharge destruction printing layer 4 and the optical variable layer 3 are formed as uniform films. Yes. On the other hand, after printing and recording, the recorded portion 5 serves as a discharge destruction portion, and the discharge destruction printing layer 4 is destroyed and removed, and when viewed from the surface, the optical variable layer 3 appears to be exposed.

  The print recording medium 1 shown in FIG. 2 is in a state in which the optical variable layer 3 is hidden and cannot be seen at all before print recording. However, after the print recording, the optical variable layer 3 is printed as a portion of discharge breakdown. Only at the portion 5, the optical variable layer 3 located on the base is exposed and becomes visible. The exposed recording portion 5 has a variable pattern, has high anti-counterfeiting properties, and it becomes very difficult to tamper with the printed and recorded portion.

  In the print recording medium shown in FIG. 1B, the optical variable layer 3 is partially visible before the print recording, and the optical variable layer 3 positioned under the discharge destruction print layer 4 In the recorded part later, it is added as a visible state. Further, when printing is performed on the print recording medium shown in FIG. 1C, if the print recording portion 5 is directly above the optical variable layer 3 positioned under the discharge destruction print layer 4, the discharge is performed. The destructive print layer 4 is destroyed and removed, and the optical variable layer 3 located on the base is exposed and visible at the print portion. Further, when the print recording portion 5 does not have the optical variable layer 3 under the discharge destruction print layer 4 and the base material 2 is positioned, the discharge destruction print layer 4 is destroyed and removed, and the print portion 5 is The base material 2 located on the ground is exposed.

  FIG. 3 is a schematic view showing another embodiment of the print recording medium 1 of the present invention. On the substrate 2, an adhesive layer 8, a concealing layer 6, an optical variable layer 3, a discharge breakage printing layer 4, a protective layer. 7 are laminated in this order, and the portion composed of the adhesive layer 8, the concealing layer 6, the optical variable layer 3, the discharge breakage printing layer 4, and the protective layer 7 is a so-called print label 9 as a base as an arbitrary article. The adhesive layer 8 can be applied to the material 2. Each layer constituting the print recording medium of the present invention will be described in detail below.

(Base material)
The print recording medium of the present invention has a structure in which a discharge destruction printing layer and an optical variable layer are laminated, and is preferably used together with the base material 2 that supports the discharge destruction printing layer and the optical variable layer. The substrate 2 is made of a sheet-like, film-like or plate-like material, and the material is not particularly limited. Polyethylene terephthalate (PET), nylon, cellulose diacetate, polystyrene, polyethylene, polypropylene, polyester, polyimide In addition, plastics such as polyvinyl chloride and polycarbonate, metals such as copper and aluminum, paper, impregnated paper and the like can be used alone or in combination and laminated. The thickness of the substrate is suitably about 0.005 to 5 mm.

(Optical variable layer)
The optical variable layer 3 in the print recording medium of the present invention has a hologram or diffraction grating structure, a multilayer film composed of a ceramic thin film or metal thin film having a color shift effect, or a polymer exhibiting polarization. A liquid crystal layer having a latent image layer having a color shift effect can be used. In the print recording medium of the present invention, as shown in FIGS. 1A, 1B, and 1C, both the optical variable layer and the discharge destruction print layer described later are smaller than the size of the substrate surface. The state is preferable because the manufacturing cost is low.

(Relief forming layer)
In the case of a hologram or diffraction grating structure, the optical variable layer can be formed by laminating a relief forming layer and a reflective layer. In the optical variable layer 3 shown in FIG. 1, the relief forming layer is located on the discharge destruction printing layer 4 side, and the reflection layer is located on the substrate 2 side. Materials constituting the relief forming layer include polyvinyl chloride, acrylic resins (eg, polymethyl methacrylate), thermoplastic resins such as polystyrene and polycarbonate, and unsaturated polyester, melamine, epoxy, polyester (meth) acrylate, Cured thermosetting resins such as urethane (meth) acrylate, epoxy (meth) acrylate, polyether (meth) acrylate, polyol (meth) acrylate, melamine (meth) acrylate, triazine acrylate, unsaturated ethylene Cured UV curable resin such as a composition in which a sensitizer is added to a mixture of monomer and unsaturated ethylene oligomer as appropriate, or a mixture of the above thermoplastic resin and thermosetting resin or radical polymerizability Thermoformable material having an unsaturated group There can be used. Particularly preferred are thermosetting resins having excellent durability such as chemical resistance, light resistance and weather resistance, and ionizing radiation curable resins such as ultraviolet rays and electron beams. Examples of the ionizing radiation curable resin include those obtained by curing an ionizing radiation curable resin such as an epoxy-modified acrylate resin, a urethane-modified acrylate resin, and an acrylic-modified polyester.

  As a method of providing the relief forming layer, the interference fringes are in a concavo-convex shape, the hologram master recorded on the surface is used as a press mold, and the concavo-convex surface of the press mold and the above-described resin sheet are overlapped with each other. The relief forming layer (hologram) can be formed by heating and pressure-contacting both with a means such as a heating roll to replicate the concavo-convex pattern of the hologram original plate on the surface of the resin sheet. In addition to such a planar hologram, a volume hologram can be duplicated by superimposing a sheet of photopolymer or the like and a hologram original plate prepared in advance and irradiating a slit-shaped laser beam. Thereafter, processing such as heat development may be performed.

  As described above, a relief is shaped on the surface of the relief forming layer to form a hologram image. The relief may be an uneven relief, for example, a surface uneven pattern (light diffraction pattern) capable of reproducing a two-dimensional or three-dimensional image is formed. As this surface concavo-convex pattern, a hologram or diffraction grating in which the intensity distribution of the interference fringe light due to the interference between the object light and the reference light is recorded in the concavo-convex pattern can be applied. Holograms include laser reproduction holograms such as Fresnel holograms, white light reproduction holograms such as rainbow holograms, color holograms utilizing these principles, computer generated holograms (CGH), and holographic diffraction gratings. Examples of the diffraction grating include a holographic diffraction grating using a hologram recording means. In addition, an arbitrary diffraction light can be obtained based on a calculation by mechanically creating a diffraction grating using an electron beam drawing apparatus or the like. A diffraction grating can also be mentioned. These holograms and / or diffraction gratings may be recorded in a single or multiple manner or in combination. Further, as the surface uneven pattern other than the hologram and the diffraction grating, a line-shaped uneven pattern, an interference pattern, a Fresnel lens, a lenticular lens, and the like can be applied.

(Reflective layer)
By providing a reflection layer on the relief on the relief forming layer surface provided with a relief structure such as a hologram or a diffraction grating, the reproduced image of the hologram and / or the diffraction grating can be clearly seen. When a metal that reflects light is used as the reflective layer, it becomes an opaque type, and when a transparent metal compound having a difference in refractive index from the relief forming layer surface is used, it becomes a transparent type. As the reflective layer, metals such as Cr, Ti, Fe, Co, Ni, Cu, Ag, Au, Ge, Al, Mg, Sb, Pb, Pd, Cd, Bi, Sn, Se, In, Ga, Rb, In addition, thin films such as oxides, sulfides, and nitrides thereof may be used singly or in combination. Preferred metals are aluminum, chromium, nickel, gold and silver.

Further, as the transparent type reflective layer, a transparent metal compound having a difference in refractive index from the relief forming layer surface is used. Since the optical refractive index is different from that of the relief forming layer, a relief such as a hologram can be visually recognized with a substantially colorless and transparent hue and no metallic luster. As the refractive index of the reflective layer, the larger the difference in refractive index from the relief forming layer surface, the more effective, and the difference in refractive index is 0.3 or more, preferably 0.5 or more, more preferably 1.0 or more. is there. For example, ZnS, TiO ₂ , Al ₂ O ₃ , Sb ₂ O ₃ , SiO, TiO, SiO ₂ , ITO, etc. can be applied, preferably ITO or tin oxide, each having a refractive index of 2.0. There is a sufficient difference in refractive index. In addition, examples with a small refractive index include LiF, MgF ₂ , and AlF ₂ . In addition, this transparent should just permeate | transmit visible light enough, and a colorless or colored and transparent thing is also contained.

  The thin film formation of the above metal and transparent metal compound can be obtained by a vacuum thin film method such as a vacuum deposition method, a sputtering method, an ion plating method, etc. so as to have a thickness of about 10 to 5000 nm, preferably 20 to 2000 nm. . If the thickness of the reflective layer is less than this range, light is transmitted to some extent and the effect is reduced, and if the thickness is more than that, the reflective effect is not changed, which is wasteful in cost. In terms of the lame effect, a metal thin film is preferable.

(Multilayer film with color shift effect)
The optical variable layer can be formed of a multilayer film composed of a ceramic thin film or a metal thin film having a color shift effect. Here, the color shift is a change in color depending on the viewing angle, and the multilayer film having the color shift effect is a multilayer thin film layer having different optical aptitudes, such as a metal thin film, a ceramic thin film or the like. The composite thin film is laminated and formed. For example, when thin films having different refractive indexes are stacked, a high refractive index thin film and a low refractive index thin film may be combined, or a specific combination may be stacked alternately. By combining them, a desired multilayer thin film can be obtained.

This multilayer thin film is made of a material such as ceramics or metal, and a high refractive index material having a refractive index of about 2.0 or more and a low refractive index material having a refractive index of about 1.5 are laminated with a predetermined film thickness. Is. An example of the material used below is given. First, as ceramics, for example, Sb ₂ O ₃ (3.0 = refractive index: the same shall apply hereinafter), Fe ₂ O ₃ (2.7), TiO ₂ (2.6), CdS (2.6), CeO _2. (2.3), ZnS (2.3), PbCl ₂ (2.3), CdO (2.2), Sb ₂ O ₃ (2.0), WO ₃ (2.0), SiO (2. 0), Si ₂ O ₃ (2.5), In ₂ O ₃ (2.0) and the like.

  Examples of the single metal or alloy thin film include Al, Fe, Mg, Zn, Au, Ag, Cr, Ni, and Cu. Examples of the low refractive index organic polymer include polyethylene (1.51), polypropylene (1.49), polytetrafluoroethylene (1.35), polymethyl methacrylate (1.49), and the like. . At least one kind selected from these high refractive index materials and at least one kind selected from low refractive index materials are alternately laminated at a predetermined thickness to form a multilayer thin film that absorbs or reflects visible light having a specific wavelength.

  A known method can be used for forming the multilayer thin film, and a physical vapor deposition method such as a normal vacuum deposition method or a sputtering method, or a chemical vapor deposition method such as a CVD method can be used. In addition, as a method for forming a low refractive index organic polymer, a known gravure printing method, an offset printing method, a screen printing method, or a coating method such as a bar coating method, a gravure method, or a roll coating method may be used. Can do. The film thickness of the above-mentioned multilayer thin film layer can be used in the range of 50 to 20000 mm in total thickness including all multilayers.

(Latent image layer with color shift effect)
As the optical variable layer, a latent image layer having a color shift effect using a polymer liquid crystal exhibiting polarization can be used. As this latent image layer, a material having the same orientation on the entire surface and showing the same polarization property on the entire surface, a material having a partially different orientation, or a partially different polarization by partially changing the orientation by an external force. The material etc. which can provide property can be used. For example, polymer resin materials such as polypropylene, polyethylene, polystyrene, and polyester can be used.

  In addition, a polymer liquid crystal material can be used as the latent image layer, and specifically, a polymer liquid crystal material such as a polyester copolymer, polyether, polycarbonate, polyisocyanate, or polyglutamate can be used. The polymer liquid crystal material preferably has a thermotropic property that can be easily aligned by heating and pressing. Examples of the orientation method include simple methods such as hot stamping, a thermal head, and heating with a laser. By these methods, a high-definition latent image portion can be easily formed.

  A latent image is obtained by preparing a coating liquid in which a polymer material that has been previously oriented and polarized is finely divided into fine pieces and dispersed in a polymer resin such as polyester or acrylic, and the liquid is applied. A layer can be formed. As the coating method, known coating means such as a gravure printing method, a screen printing method, and a nozzle coater method can be used, or a film obtained by a fill molding technique such as an extrusion molding method or a biaxial stretching method can be used. It is also possible to form by bonding. The film thickness of such a latent image layer is the same as that of the multilayer film having the color shift effect.

(Discharge breakdown printing layer)
The discharge breakage printing layer 4 is made of a thin film of a single metal, alloy, or compound, and is made of a layer that can break a recording site by utilizing a discharge phenomenon. Specific examples of the material constituting the discharge destruction printing layer include metals such as Al, Ni, Sn, Zn, Te, In, Bi, and Pb, and alloys and compounds thereof. The discharge breakage printing layer can be formed on the optical variable layer by a method such as vacuum deposition, sputtering, or plating. The thickness of the discharge breakage printing layer is about 100 to 1 μm, more preferably about 300 to 1000 μm (1 μm).

(Hidden layer)
In the print recording medium of the present invention, the concealing layer 6 can be provided under the optical variable layer so that the optical variable layer can be clearly seen when viewed. As this concealing layer, a black colorant such as carbon black made into an ink with a binder, a metal pigment containing zinc dust, an aluminum pigment, metal powder (brass, copper), a titanium white pigment, an organic type Using pigments with high concealment properties such as white pigments made into inks with binders, printing methods such as known gravure printing method, offset printing method, screen printing method, bar coating method, gravure method, roll coating method, etc. It can be formed by a coating method such as. The thickness of the shielding layer is about 10 nm to 1500 μm. If the masking layer is formed by printing with the ink containing the black colorant as described above, the back (background) of the optical variable layer becomes black as the black masking layer, and the contrast with the adjacent portion increases. The reconstructed image and pattern in the optical variable layer can be clearly seen and used preferably.

(Protective layer)
In the print recording medium of the present invention, the protective layer 7 can be provided as the uppermost layer of the recording surface. In general, the protective layer is formed for the purpose of protecting the discharge breakage printing layer, which is a recording layer, in order to ensure the physical characteristics and durability of the recording medium. By selecting the material of the protective layer, it is possible to prevent the fusing phenomenon and to make it difficult for the discharge pin to travel. In the protective layer, additives such as Teflon (registered trademark) wax and lubricant can be added to the binder resin described below.

  The binder resin of the protective layer is preferably an ultraviolet ray or an electron beam curable resin, and in particular, a polyfunctional resin is suitable in order to make it difficult for the trace of the discharge pin to be attached. An example of the polyfunctional resin is a polyfunctional acrylic resin. Examples of the polyfunctional acrylic resin include dipentaerythritol pentaacrylate and dipentaerythritol hexaacrylate.

  In addition, the binder resin, if necessary, photopolymerization initiators such as acetophenones, benzophenones, Michler benzoyl benzoate, α-amyloxime ester, tetramethylmeurum monosulfide, thioxanthones, n-butylamine, Photosensitizers such as triethylamine, tri-n-butylphosphine and N-vinylpyrrolidone can be contained.

  Examples of the method for forming the protective layer include an offset printing method, a silk screen printing method, a roll coating method, a reverse coating method, a gravure coating method, a gravure reverse coating method, a kiss coating method, and a comma coating method. The curing of the ultraviolet curable resin is performed by irradiating ultraviolet rays having an energy of 100 to 1000 kev, preferably 100 to 300 kev, with a light source such as a carbon arc, a xenon lamp, a high pressure mercury lamp, an ultrahigh pressure mercury lamp, a metal halide lamp, or various electron beam accelerators. Can be performed. The electron beam curable resin can be cured by irradiating with an electron beam using a non-scanning electron beam curing device, a scanning electron beam curing device or the like. The thickness of the protective layer is about 0.5 to 5 μm.

(Adhesive layer)
In the print recording medium of the present invention, an optical variable layer and a discharge destruction print layer are sequentially laminated, and are attached to a substrate under the optical variable layer, that is, on the side opposite to the side having the discharge destruction print layer. An adhesive layer 8 can be provided for fixing. The pressure-sensitive adhesive layer can be formed using any conventionally known solvent-based and water-based pressure-sensitive adhesives. Examples of the adhesive include vinyl acetate resin, acrylic resin, vinyl acetate-acrylic copolymer, vinyl acetate-vinyl chloride copolymer, ethylene-vinyl acetate copolymer, ethylene acrylic acid copolymer, ethylene-acrylic acid ester. Examples include copolymers, polyurethane resins, natural rubber, chloroprene rubber, and nitrile rubber. The thickness of the pressure-sensitive adhesive layer is generally about 8 to 30 μm. The pressure-sensitive adhesive layer can be formed by applying and drying by a conventionally known method such as gravure coating, gravure reverse coating or roll coating.

  Prepare a urethane-modified acrylate resin sheet (thickness 0.5 mm), form a hologram relief on the resin sheet surface to make an optical variable layer, and use aluminum on the optical variable layer by vacuum deposition. A discharge destruction printing layer having a thickness of 400 mm was formed to produce a print recording medium of the present invention.

  A three-layer card produced by thermocompression bonding of a 0.15-mm thick vinyl chloride sheet on both sides of a 0.2-mm-thick vinyl chloride center core as a base material A substrate was prepared. A black ink containing carbon black is printed on a part of the base material to form a concealing layer, and on the concealing layer, the urethane pattern is overlapped with the printing pattern of the concealing layer. The modified acrylate resin was applied to form a relief forming layer. A relief of a hologram was formed on the surface of the relief forming layer, and an optical variable layer was provided. On the optical variable layer, an electric discharge destruction printing layer was formed at a position overlapping with the printing pattern of the concealing layer with a thickness of 400 mm by vacuum deposition using aluminum. Further, a protective layer was formed on the discharge breakage print layer with the following composition at a thickness of 1 μm and overlapping the print pattern of the concealment layer, thereby producing a print recording medium of the present invention.

(Protective layer coating solution)
Polyvinyl butyral resin 10 parts Urethane resin 10 parts Tetrafluoroethylene powder 10 parts Ethyl acetate 30 parts Toluene 30 parts Methyl ethyl ketone 30 parts All the above "parts" are based on mass.

  In the print recording medium prepared in Example 2 above, the conditions of the protective layer / discharge breakdown printing layer / optical variable layer / hiding layer were the same, but the hiding layer had a thickness of 10 μm under the hiding layer with the following composition. An adhesive layer was formed at a position overlapping with the printed pattern of the layer to prepare a print label. And the printed label was stuck and fixed to the fixed position of the identification card (base material) using the adhesion layer. (It becomes a structure as shown in FIG. 3)

(Adhesive layer coating solution)
Acrylic copolymer (SK Dyne 1310L, manufactured by Soken Chemical Co., Ltd.) 48 parts Epoxy resin (curing agent E-AX, manufactured by Soken Chemical Co., Ltd.) 0.36 parts Ethyl acetate 51.64 parts

  With respect to the print recording media of Examples 1 to 3 produced as described above, a discharge corresponding to the record information was generated by the recording pin, and a discharge breakage portion was formed in the discharge breakage print layer to perform information recording. As a result, in all the examples, the recording portion of the discharge breakdown was destroyed and removed, and the optical variable layer located on the base was exposed and exposed only at the print portion. As a result, the forgery prevention property is high, and it has been possible to reliably prevent falsification of the printed and recorded contents. In Examples 2 and 3, by providing the optically variable layer and the discharge destruction printing layer on the base material partially rather than on the entire surface, the manufacturing cost can be suppressed, and a highly practical print recording medium can be obtained. I was able to get it.

It is the schematic which shows embodiment of the printing recording medium of this invention. It is the schematic which shows the state of both before the printing recording of the printing recording medium of this invention, and after printing recording. It is the schematic which shows another embodiment of the printing recording medium of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Print recording medium 2 Base material 3 Optical variable layer 4 Electric discharge destruction printing layer 5 Recorded part 6 Concealment layer 7 Protective layer 8 Adhesive layer 9 Print label

Claims (5)

  In a print recording medium in which a discharge break print layer and an optical variable layer are laminated, the discharge break print layer is broken and removed by print recording, and the optical variable layer located on the base is exposed only at the print portion. A print recording medium characterized by being visible.   2. The print recording medium according to claim 1, wherein the optically variable layer and the discharge breakage print layer are laminated in this order, and at least one of these layers is laminated on at least a part of the substrate.   The print recording medium according to claim 2, wherein an adhesive layer is provided between the base material and the optical variable layer.   The print recording medium according to claim 1, wherein a protective layer is laminated on the discharge destruction printing. The print recording medium according to claim 1, wherein a concealing layer is provided under the optical variable layer.

Images