JP2011227668A - Forgery preventing ic label - Google Patents

Abstract

[PROBLEMS] To peel off an IC inlet built in an IC label to be used by attaching to a product or its package, the antenna is destroyed and cannot be used again, and has a high security function and high accuracy. Provided is an IC label provided with a function for preventing forgery and alteration that allows simple authentication.
An IC chip that wirelessly transmits predetermined identification information stored in an IC chip to a label base material provided with an adhesive to be used by being attached to a product or its package, and an IC having the antenna An inlet was provided, and the IC inlet and the label substrate were cut to provide a solvent coloring layer, a heating foam layer, and a numbering printing section for printing the identification number of the IC inlet.
[Selection] Figure 3

Description

  The present invention relates to an IC label for preventing forgery or alteration used by attaching to a product or its package, and the IC inlet and the label are peeled off from the product and improperly attached to the forgery or alteration. Related to IC labels with a countermeasure function against actions.

  In recent years, sealing labels have been affixed to product bodies and packaging cases, etc. in order to prove that they are genuine products for relatively expensive products such as high-class liquor and appliances that are difficult to forge. ing. However, fraud has been discovered that the sealed label attached to the regular article is peeled off, and the sealed label certifying that the genuine article has been peeled off is attached to the counterfeit product and distributed.

  In order to cope with such an illegal act, a sealed label having an anti-counterfeiting function in which an IC inlet storing unique identification information is embedded and individual discrimination is proposed has been proposed (Patent Document 1). In addition, a technique has been proposed in which a heat-sensitive color-developing layer is laminated on a sealing label to form a sealing label having a function of preventing falsification (Patent Document 2).

  However, the antenna used for the IC inlet as described above usually destroys the antenna because aluminum or copper is etched on a tough substrate such as polyimide, polyethylene naphthalate (PEN), or polyethylene terephthalate (PET). It is difficult to do so, and the IC inlet can be taken out and used easily.

  On the other hand, the sealing label itself can be easily falsified by means such as color copying. In addition, it has been discovered that fraud is caused by removing only an IC inlet from a sealed label attached to a regular article and attaching the removed IC inlet to a forged or altered sealed label due to a solvent or heat.

JP 2003-150924 A JP 2008-268380 A

  The present invention solves the problems of the prior art, and the problem is that when an IC inlet built in an IC label attached to a product or its package is peeled off, an antenna is used. It is an object of the present invention to provide an IC label with a function for preventing forgery and alteration, which can be used with high security functions and can be used for high accuracy and simple authentication.

As means for solving the above-mentioned problems, the invention according to claim 1 is directed to a predetermined label stored in an IC chip on a label base material provided with an adhesive to be used by being attached to a product or its package. An IC chip that wirelessly transmits identification information by an antenna and an IC inlet having an antenna, and is cut into the IC inlet and a label base material, and a solvent coloring layer, a heating foam layer, and a numbering print for printing the identification number of the IC inlet It is an IC label for forgery / alteration prevention characterized by providing a portion.

  According to a second aspect of the present invention, there is provided the IC inlet antenna comprising: a conductive paste in which a single or plural particles of silver, copper, nickel, conductive carbon, and heated foam particles are dispersed in a resin binder. The anti-counterfeit IC label according to claim 1, wherein the IC label is provided by a printing method.

  The invention according to claim 3 is characterized in that at least one of OVD, fluorescent material, phosphorescent material, and liquid crystal material layer is provided on the label base material. IC label for prevention.

  In accordance with the present invention, in response to an illegal act of peeling off a sealed label attached to a regular product to a counterfeit or altered product and distributing it by attaching a cut to the label, When the action of chemical peeling using the solvent shown in the conceptual cross-section shown in the figure is colored, leaving a trace of counterfeit, and foaming for the action of physical peeling using heat. Forgery and alteration can be prevented by providing a numbering printing unit that prints the identification number of the IC inlet and an OVD (Optical Variable Device) that can be visually checked for authenticity.

It is the section conceptual diagram showing the embodiment of the IC inlet of the present invention. It is a section conceptual diagram showing an embodiment of an IC label of the present invention. It is the section conceptual diagram showing one embodiment of the cut provided in the IC label of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a conceptual cross-sectional view showing an embodiment of an IC label for preventing counterfeiting provided with a solvent coloring function, a heating foaming function, and a numbering printing function for printing an identification number of an IC inlet according to the present invention. 1 is a conceptual cross-sectional view showing an embodiment of the present invention having an antenna function and a heating foam function.

  Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an IC inlet 1. An antenna 3 is formed on a support 2 by patterning a metal foil or a metal thin film, or a printed layer of conductive paste such as silver. The IC chip 4 is connected via the unit 5.

  The support 2 may be formed of a brittle film or paper. For example, a synthetic resin film, a film formed of a highly crystalline plastic material by solution film formation, or a UV curable synthetic resin film is UV cured and dried. Film, fine paper, medium paper, fine coated paper, coated paper, art paper, cast coated paper, glass impregnated paper, kraft paper, synthetic paper, etc. There is.

  The antenna 3 is formed by laminating a metal foil on a support, or by forming a metal thin film on the support by vapor deposition and then patterning, or forming a conductive paste by printing. The conductive material used for the conductive paste is preferably silver, and includes an evaporative drying type silver paste containing a binder resin, a solvent, and silver powder to obtain conductivity by contacting them.

  However, the conductive material is not limited to silver, and a material in which metal powder such as copper or nickel, conductive carbon powder, conductive fiber, conductive whisker, or the like is dissolved or dispersed in a solvent together with a binder can also be used. The antenna 3 can be formed by printing by a printing method such as screen printing, flexographic printing, gravure printing, or offset printing. It is also possible to print conductive ink with a printer.

  For example, the IC chip 4 has a square shape with a side portion having a length dimension of 0.5 mm and a height dimension of 0.1 mm. In addition, the length dimension of a side part can be changed suitably, and it is preferable to make the length dimension of a side part into the range of 0.05 mm to 0.5 mm. The lower limit of 0.05 mm is the minimum size that can physically form a circuit. Further, the shape of the IC chip 4 can be changed as appropriate, such as a rectangular shape. Also in this case, it is preferable that the length dimension of the side portion (long side portion) is in the range of 0.05 mm to 0.5 mm. In addition, the chip | tip of such a dimension is already implement | achieved by the Muchip (TM) of Hitachi, Ltd. by the dimension of about 0.4 mm in width, 0.4 mm in depth, and 0.1 mm in height, for example, It is well known that it is technically possible to mass-produce and manufacture such IC chips. Further, the IC chip 4 described above includes a memory and stores an identification ID, so that each can be identified.

  The electrical joint 5 is composed of metal particles such as ACP and ACF (Anisotropic Conductive Paste / Film) and an adhesive binder, and the adhesive binder under heat and pressure conditions. It is desirable that electrical connection is realized by curing.

  Further, the support 2 of the IC inlet 1 and the antenna 3 are provided with cuts 17 at regular intervals. Thereby, the antenna 3 can be easily broken when the IC label 6 is peeled off.

  In this way, by using an IC label provided with a printed antenna with a cut, if the IC label attached to the adherend is to be peeled off, the antenna is destroyed and information reading from the IC chip is not performed normally. The history of trying to peel the IC label can be left. At the same time, since the antenna is destroyed, it is possible to make counterfeiting by reusing the IC inlet impossible.

  FIG. 2 is a conceptual cross-sectional view showing an embodiment of an IC label. An adhesive layer 8 for attaching to an adherend is provided on one surface of a sheet-like label base material 7, and this adhesive layer 8 The IC inlet 1 is provided between the release sheet 9 and the release sheet 9. Further, a solvent coloring layer 11 is provided on the other surface of the label substrate 7 and a printing layer 10 on which various information such as the name of the adherend is printed is laminated. A security function layer 12 and a numbering printing unit 13 are provided on the surface of the printing layer 10.

  The label base material 7 is formed of a brittle film or paper, and the material of the label base material 7 is, for example, brittle vinyl chloride, brittle polyester or the like embrittled by mixing an appropriate amount of a plasticizer such as kaolin or calcium carbonate. Or a film obtained by forming a highly crystalline plastic material such as cellulose acetate, low-density polyethylene, polystyrene, polyphenylene sulfide or the like by solution film formation.

  Other materials include UV-cured synthetic resin or UV-cured synthetic resin mixed with an appropriate amount of powder such as kaolin and calcium carbonate, and a film obtained by curing and drying the resin thin film by UV irradiation. . Moreover, non-woven fabrics made of synthetic fibers, or paper such as art paper, coated paper, and high-quality paper can be used.

Since the label base material 7 itself is brittle as described above, when the label base material 7 attached to the adherend is to be peeled off, the label base material 7 is peeled off by the force to be peeled off. 7 can be easily broken.

  Since the adhesive strength of the adhesive layer 8 is set to 8000 mN / 25 mm according to JIS Z0237, when the label base material is peeled off from the adherend to the adhesive layer coated with the IC inlet, In order to break the substrate, it is necessary to increase the adhesive force between the adherend and the adhesive rather than the breaking force of the label substrate. Therefore, as the adhesive layer 8, it is necessary to select a material having an adhesive strength of 8000 mN / 25 mm or more and 30000 mN / 25 mm or less according to JIS Z0237.

  In addition, the adhesive strength of the adhesive layer 8 is desired to be greater than the breaking strength of the label base material. However, a label base material weakened by cutting or the like in the actual peeling operation peels off if the adhesive strength is 8000 mN / 25 mm or more. The label base material 7 can be surely broken when the label base material 7 attached to the adherend is to be peeled off, and is made of a paper base material. The antenna 3 formed by printing can also be destroyed.

  Further, the IC inlet 1 is provided on the surface of the adhesive layer 8, but the present invention is not limited to this. The adhesive layer 8 is coated on the surface of the IC inlet 1, or the adhesive 8 is coated on the front and back of the IC inlet. May be. In this case, if the label base material 7 is peeled off from the adherend, the IC inlet 1 may remain on the adherend. Therefore, if the label base material 7 is peeled off, the IC inlet 1 can be reliably destroyed. Desirably, for example, it is possible to easily break the IC inlet 1 by forming a cut as described later in the IC inlet 1.

  The release sheet 9 is formed by laminating a release agent layer such as silicon resin on a paper or plastic sheet by coating or the like. The print layer 10 only needs to be formed by printing using a printing method such as screen printing, flexographic printing, gravure printing, offset printing, and the design can be printed as necessary. Is also excellent.

  As the solvent coloring layer 11, a solvent that dissolves the adhesive layer 8 used in the IC label 1 attached to the adherend is selected, and water-insoluble dye particles that are soluble in an organic solvent are used as a resin binder. It has a structure in which it is held in a dispersed state with extender pigments and the like. Any dye particles may be used as long as they are water-insoluble and soluble in an organic solvent, but dyes such as leuco dyes and fluorescent brighteners are excellent.

  Since the adhesive of the adhesive layer 8 is soluble in an organic solvent, when attempting to peel off the IC label 6, an organic solvent having weak solubility (such as ethyl alcohol or acetone used as a light removing liquid) or a commercially available seal is used. Using a peeling liquid or the like, the label base material 7 is to be peeled off without being damaged from the adherend. Therefore, the dye held in the solvent coloring layer 11 in a dispersed state reacts with the solvent and dissolves, and a trace can be left as color on the label substrate 7. That is, the solvent coloring layer 11 has a solvent coloring function.

  As the security function layer 12, it is preferable to use a material that can be determined by visual inspection or by using a simple device. Examples of such a material include an OVD functional material, a fluorescent material or a phosphorescent material, or a liquid crystal material. The material includes at least one of an OVD functional material, a fluorescent material, a phosphorescent material, and a liquid crystal material. .

The OVD functional material is an image that uses light interference, and is a display body that causes a color shift in which the color changes depending on the representation of a stereoscopic image and the viewing angle, and is a medium that can be determined by visual inspection. Among them, examples of the OVD such as a hologram and a diffraction grating include a relief type that records light interference fringes on a plane as a fine uneven pattern, and a volume type that records interference fringes in a volume direction.

  Also, although the method is different from that of holograms and diffraction gratings, there are multilayer film systems in which thin films of ceramics and metal materials with different optical characteristics are laminated, or materials that cause color change (color shift) depending on the viewing angle due to liquid crystal materials etc. This is an example. These OVDs can be said to be effective means for preventing forgery because they give a unique impression such as stereoscopic images and color shifts and require advanced manufacturing techniques.

  Among these OVDs, in consideration of mass productivity and cost, a relief hologram (or a relief diffraction grating) or a multilayer thin film type is preferable, and these OVDs are generally widely used. First, a relief hologram will be described. This relief type hologram or relief type diffraction grating is mass-produced using a relief type press plate having a fine uneven pattern forming a hologram or a diffraction grating, respectively. That is, this press plate heats and pressurizes the OVD forming layer to replicate a fine uneven pattern.

The OVD forming layer is for increasing the diffraction efficiency, and is made of a material having a refractive index different from that of the polymer material constituting the relief surface. As a material to be used, high refractive index materials such as TiO ₂ , Si ₂ O ₃ , SiO, Fe ₂ O ₃ , and ZnS having different refractive indexes, Al, Sn, Cr, Ni, Cu, and Au having a higher reflection effect are used. These materials are used alone or in combination. These materials are formed by a well-known thin film forming technique such as a vacuum deposition method or sputtering, and the film thickness is about 0.5 to 100 nm although it varies depending on the application. In order to prevent the hologram from affecting the communication of the IC inlet 1, it is desirable to specify a metal vapor deposition portion or use a transparent hologram made of a non-metal vapor deposition material.

  Furthermore, a multilayer thin film method will be described. When the multilayer thin film method is used, as described above, the OVD forming layer is formed of a multilayer thin film layer having different optical aptitudes, and is formed by laminating as a metal thin film, a ceramic thin film, or a composite thin film including them together. 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 layer is made of a material such as ceramics or metal, and is formed by laminating approximately two or more high refractive index materials and a low refractive index material having a refractive index of about 1.5 with a predetermined film thickness. Examples of materials used are given below. First, as ceramics, Sb ₂ O ₃ (3.0 = refractive index n: hereinafter the same), 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), PbO (2.6), Ta ₂ O ₃ (2.4), ZnO (2.1), ZrO ₂ ( _{2.0), MgO (1.6),} SiO 2 (1.5), MgF 2 (1.4), CeF 3 (1.6), CaF 2 (1.3~1.4), AlF 3 (1.6), Al ₂ O ₃ (1.6), GaO (1.7), and the like.

  And as a metal simple substance or an alloy thin film, Al, Fe, Mg, Zn, Au, Ag, Cr, Ni, Cu, Si etc. are mentioned, for example. Examples of the low refractive index organic polymer include polyethylene (1.51), polypropylene (1.49), polytetrafluoroethylene (1.35), polymethyl methacrylate (1.49), polystyrene (1 .60) and the like.

  By selecting at least one kind from these high refractive index materials or 30% to 60% transparent metal thin film, selecting at least one kind from low refractive index materials, and alternately laminating them at a predetermined thickness, It shows absorption or reflection for visible light. Note that a thin film made of a metal has a value under a certain condition in the present application because an optical characteristic such as a refractive index changes depending on a state of a constituent material or a forming condition.

  Each of the above materials is appropriately selected based on optical properties such as refractive index, reflectance, and transmittance, weather resistance, interlayer adhesion, and the like, and is laminated as a thin film to form a multilayer thin film layer. A known method can be used as the formation method, and the film thickness, film formation speed, number of layers, or optical film thickness (= n · d, n: refractive index, d: film thickness) can be controlled. The vacuum evaporation method and the sputtering method are used.

  Depending on whether these OVDs are made into a very thin foil and transferred to the IC label 6, or are squeezed into the label, or the finely divided OVD foil is dispersed in a resin binder and printed as an ink, the IC label 6 It becomes impossible to peel off and reuse.

  Next, as a fluorescent material or a phosphorescent material, an ink that is controlled or a special ink that is difficult to obtain is provided on the IC label 6 by a printing method, so that it can be verified visually or by using a simple verifier. Judgment is possible. For example, what brings about an optical effect includes a method of printing ink, fluorescent ink, fluorescent fiber, or the like that emits light when irradiated with ultraviolet rays or infrared light, or a method of printing on paper.

  The image of the drawn character or pattern emits light when irradiated with a black lamp (ultraviolet light) or infrared light (780 nm or more). As a result, an image that was not originally detected under visible light (400 to 700 nm) can be verified visually or through a light receiving element. In particular, since a specific wavelength limited to the material is returned, verification with a simple verifier is possible. Easy and reliable. The material used for the fluorescent color developing portion has a color tone pattern that changes by irradiation with ultraviolet rays or infrared rays, and when dispersed in an ink resin, a colorless and transparent material having a refractive index that is the same as or close to that of the ink resin is preferable.

Moreover, there exists a fluorescent substance as fluorescent material or luminous material. Examples of the phosphor include an ultraviolet light emitting phosphor and an infrared light emitting phosphor, and examples thereof are given below. The ultraviolet phosphor emits light in the visible wavelength region when irradiated with ultraviolet rays. For example, Ca ₂ B ₅ O ₃ Cl: Eu ₂₊ , CaWO ₄ , ZnO: Zn ₂ SiO ₄ : Mn, Y ₂ O ₂ S: Eu, ZnS: Ag, YVO ₄ : Eu, Y ₃ 0 ₃ : Eu, Gd ₂ O ₂ S: Tb, La ₂ O ₂ S: Tb, Y ₃ Al ₅ O ₁₂ : Ce, and the like. The amount of these phosphors added is such that light emission when irradiated with black light can be visually confirmed, or fluorescence can be detected by the light receiving element of the detector.

  In addition, by printing these special inks on the surface of the label base material 7, or making paper in the label base material 7, or by making the whole into a special shape such as a star shape, It can be expected that an anti-counterfeit effect is obtained.

In addition, infrared emitting phosphors include those that emit light in the visible wavelength region and those that emit light in the infrared wavelength region when irradiated with infrared rays. Examples of the former include YF ₃ : YB, Er, ZnS: CuCo, and the like. Further, as the latter, for example, LiNd _0.9 Yb _0.1 P ₄ O ₁₂ , LiBi _0.2 Nd _0.7 Yb _0.1 P ₄ O ₁₂ , Nd _0.9 Yb _0.1 Nd ₅ (MoO ₄ ) ₄ , NaNb _0.3 Yb _0.1 P ₄ O ₁₂ , Nd _0.8 Yb _0.2 Na ₅ (WO ₄ ) ₄ , Nd _0.8 Yb _0.2 Na ₅ (Mo _0.5 WO _0.5 ) ₄ , Ce _0.05 Gd _0.05 Nd _0.75 Yb _0.25 Na ₅ (W _0.7 Mo _{0.304 4} ) ₄ , Nd _0.3 Yb _0.1 Al ₃ (BO ₃ ) ₄ , Nd _0.9 Yb _0.1 Al _2.7 Cr _0.
3 (BO ₃ ) ₄ , Nd _0.4 P ₅ O ₄ , Nd _0.8 Yb _0.2 K ₃ (PO ₄ ) _{2 and the} like. The latter emits infrared light having an emission spectrum peak at 980 nm to 1020 nm by irradiating light having an infrared wavelength of around 800 nm.
The amount of the infrared light emitting phosphor added in the ink is such that the light emission can be visually confirmed or the light receiving element of the detector can detect the fluorescence.

  An example of the liquid crystal material is cholesteric liquid crystal. A cholesteric liquid crystal is a liquid crystal aligned in a spiral shape and has a polarization separation ability to reflect right or left circularly polarized light having a specific wavelength. The reflected wavelength is determined by the pitch of the spiral period, and the left and right of the circularly polarized light are determined by the direction of the spiral.

  In normal observation light, the right and left polarized lights are mixed and the image cannot be confirmed, but only one of the polarized lights can be taken out by holding the polarizing filter and can be recognized as an image. In other words, it is called a latent image technique, and the cholesteric liquid crystal is used as a color shift ink and can be camouflaged because the reflection wavelength of reflected light changes depending on the angle. The liquid crystal material is not limited to cholesteric liquid crystal, and any material that exhibits the same effect may be used.

  Since the security function layer 12 is provided in this manner, if the IC label 6 attached to the adherend is forcibly peeled off, the label base material 7 can be broken, and an anti-counterfeit effect is exhibited. I can do it. In addition, fraudulent acts such as forgery and alteration by a color copier can be prevented, and verification can be performed more reliably and quickly by applying special light. Furthermore, determination by a machine is also possible by using a light receiving element.

  On the surface of the printing layer 10, there is provided a numbering printing unit 17 on which an optically readable optical identification ID is engraved. Examples of the optical identification ID used for the numbering printing unit 13 include simple alphanumeric characters as examples that can be visually observed, and identification by a technique such as a one-dimensional barcode, a two-dimensional barcode, or a digital watermark as an example of mechanical reading. An arbitrary image on which an ID is superimposed, an array of dots and symbols, and the like can be given.

  The numbering printing unit 13 is formed by laser engraving or the like, and forms letters by cutting off the printing ink by blowing the printing ink by laser irradiation. Therefore, the effect of preventing falsification of the optical identification ID can be improved.

  Further, such an optical identification ID can be associated with the optical identification ID on the database and the identification ID of the IC chip 4, and as the association, the optical identification ID can be converted from the identification ID of the IC chip 4 by data conversion. The identification ID of the IC chip 4 is generated by data conversion from the optical identification ID. As an example of data conversion, function conversion including CRC and hash, symmetric encryption, asymmetric encryption, and the like can be used. When such an optical identification ID is used, there is an effect that the authenticity of the IC label 6 can be confirmed easily and quickly by visual observation or by an optical reader.

  By printing such an optical identification ID on the surface of the IC label 6 provided with the security function layer 11, the numbering printing unit 13 and the security function layer 11 are placed on the same surface of the label substrate (7). By providing, there is an effect that the photographic copy of the IC label 6 can be prevented.

In this manner, double security management of electrical confirmation by the IC inlet 1 and visual confirmation by the security function layer 11 can be performed, and high-precision authentication can be performed. Further, not only security management but also various information stored in the IC chip 3 enables traceability such as logistics, and strict management of valuables and personal information is possible.

  FIG. 3 is a conceptual cross-sectional view showing an embodiment of the notch provided in the IC label. By forming the notches 14 to 17, the IC label is more easily broken. The shapes of the cuts 14 and 15 can be changed as needed, and may be linear or curved. Further, by providing the support 2 with cuts 17 at regular intervals, the antenna 3 can be further easily broken when the IC label 6 is peeled off. Thereby, the label base material 7 and the antenna 3 are cut | disconnected from the notches 16 and 17, and the function as a non-contact IC label can be destroyed completely.

  Further, by providing the notch 17 only in the support body 2 without providing the notch 17 in the antenna 3, it is possible to easily break the antenna 3 while preventing the efficiency of the antenna 3 from being lowered. Note that the notch 17 can be provided up to the antenna 3. In this case, the antenna 3 can be more easily broken.

  Furthermore, by providing a cut in the support 2 and the antenna 3, the antenna 3 can be more easily broken, and it can be further expected that the information stored in the IC chip 4 cannot be read out.

  FIG. 4 is a schematic cross-sectional view showing an embodiment of an IC label for preventing counterfeiting provided with a solvent coloring function, a heating foaming function, and a numbering printing function for printing an identification number of an IC inlet according to the present invention. It is the cross-sectional conceptual diagram which showed one Embodiment which provided the antenna function and heating foaming function of invention. It is assumed that the thermally foamed particle-containing layer 18 is heated, so that the adhesive of the adhesive layer 8 is softened and the IC label 6 is peeled off. Traces of will remain. The thermally foamed particle-containing conductive paste layer 19 has an antenna function and a falsification preventing function. When heated, the thermally foamed particles are foamed and the antenna 3 is damaged, and communication becomes impossible. Further, by laminating the thermally foamed particle-containing layer 18 between the support 2 and the antenna 3, the antenna is damaged by heating.

  The thermally foamable particles are spherical particles in which a liquid gas is contained in the outer shell of a thermoplastic plastic. When heated, the internal pressure of the particles increases and the outer shell softens, causing volume expansion. Examples of such expanded particles include those having an outer shell formed of polystyrene, polyolefin, or polyvinyl chloride.

  In this way, by using thermally foamed particles that are foamed by applying predetermined heat as a function for preventing falsification, not only falsification using a solvent, but also heat is used to melt the adhesive to create an IC inlet or label group. When the material is taken out and reused, the particles are foamed by the applied heat, and the antenna 3 is cracked so that it cannot be reused. Forgery and alteration can be prevented in advance.

  Production of IC label 1: As a support, ink having silver foam mixed with thermally foamed particles was printed on one side of a fragile film by screen printing (350 mesh), dried at 70 ° C for 3 minutes, and then naturally left at 25 ° C for 1 week. It was dried, and cuts were made at intervals of 4 mm around the periphery to obtain a printed antenna containing thermally foamed particles.

Two terminals of a 0.4 mm square IC chip were joined to this antenna by ACP (anisotropic conductive paste) to obtain an IC inlet. The obtained IC inlet could be read with an IC reader / writer. Label substrate (width) made of art paper with a thickness of 90μm, with a cut at the periphery (length 3mm, depth 1.5mm), and each corner (length 7.5mm) and antenna installation (4mm spacing) 60 mm, 39 mm in length) was applied with solvent coloring ink. On top of that, a pattern was printed by offset printing.

  Further, fluorescent ink that emits light by ultraviolet rays was printed as the security function layer 12. An acrylic adhesive having an adhesive strength of 12000 mN / 25 mm was applied to the label base material layer, and the IC inlet was laminated. Finally, polyethylene was laminated on one side of the kraft paper, and a silicon-treated separator (thickness: 112 μm) was temporarily adhered thereon to produce an IC label 1.

  Production of IC label 2: As a support, an ink in which thermally foamed particles are mixed with silver paste is printed on one side of a fragile film by screen printing (350 mesh), dried at 70 ° C. for 3 minutes, and then naturally dried at 25 ° C. for 1 week. The printed antenna containing thermally foamed particles was obtained by making cuts at intervals of 4 mm around the periphery. Two terminals of a 0.4 mm square IC chip were joined to this antenna by ACP (anisotropic conductive paste) to obtain an IC inlet. The obtained IC inlet could be read with an IC reader / writer. Thereafter, IC label 2 was obtained in the same procedure as IC label 1.

  (Confirmation of effect) By applying heat to the obtained IC label 1 and IC label 2, the adhesive was softened, and the IC inlet could be separated from the IC label. When the produced IC label was read and confirmed by an IC reader / writer, it was confirmed that only the IC label 1 could not be read. When the falsification by heat is performed in this way, the antenna which is a non-contact medium is destroyed and its trace remains, making it impossible to reuse. Thus, the effect of the invention was confirmed.

DESCRIPTION OF SYMBOLS 1 ... IC inlet 2 ... Support body 3 ... Antenna 4 ... IC chip 5 ... Joint part 6 ... IC label 7 ... Label base material 8 ... Adhesive layer 9 ... Release paper 10 ... Print layer 11 ... Solvent coloring layer 12 ... Security function layer 13 ... Numbering printing part 14 ... Notch 15 ... Notch 16 ... Notch 17 ...・ Incision 18 ... Thermally foamed particle-containing layer (forgery / alteration prevention function)
19 ... conductive paste layer containing thermally foamed particles (antenna function and falsification prevention function)

Claims (3)

  An IC chip for wirelessly transmitting predetermined identification information stored in an IC chip by an antenna and an IC inlet having an antenna on a label base material provided with an adhesive to be used by being attached to a product or its package, An IC label for forgery and alteration prevention, characterized in that it is provided with a numbering printing section for printing a solvent coloring layer, a heating foam layer, and an identification number of the IC inlet.   The IC inlet antenna is provided by a printing method using a conductive paste in which silver, copper, nickel, conductive carbon alone or a plurality of particles and heated foam particles are dispersed in a resin binder. The IC label for preventing forgery / alteration according to claim 1.   3. The forgery / alteration-preventing IC label according to claim 1, wherein at least one of OVD (Optical Variable Device), a fluorescent material, a phosphorescent material, and a liquid crystal material layer is provided on the label base material.