JP2011081203A - Collation element, adhesive label, transfer foil, and labeled article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a collation technology which can be utilized for various articles. <P>SOLUTION: A coating film is formed from an emulsion composed of a continuous phase containing a solvent and a polymerizing and/or crosslinking material dissolved in the solvent, and a disperse phase containing a liquid additive having lower compatibility with the solvent compared with the polymerizing and/or crosslinking material. A collation element 10 has a random pattern obtained by curing the coating film. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a verification technique.

  As described in Patent Document 1, the arrangement of paper fibers can be used for authenticity determination of securities and the like.

  Since the fiber arrangement of the paper is irregular, the fiber pattern observed for one paper is different from the fiber pattern observed for other papers. Also, the fiber pattern observed for one area of the paper is different from the fiber pattern observed for other areas of the paper. And this irregularity is not caused artificially, but is a property inherent in the paper itself.

  Therefore, this fiber pattern can be used like a fingerprint or retina for personal identification. For example, fiber patterns are registered in advance in a database for all genuine products. And the fiber pattern of the article | item in which it is unknown whether it is a genuine article is collated with the registered fiber pattern. Thereby, the authenticity of the article can be determined.

JP 2004-102562 A

The above-described technique can be advantageously applied to authenticity determination of an article made of paper. However, this technique is not suitable for use with articles other than paper.
Therefore, an object of the present invention is to provide a verification technique that can be used for various articles.

  According to the first aspect of the present invention, a solvent and a continuous phase containing a polymerizable and / or crosslinkable material dissolved in the solvent, and compatibility with the solvent compared to the polymerizable and / or crosslinkable material. A collating element having a random pattern obtained by forming a coating film from an emulsion composed of a dispersed phase containing a lower liquid additive and curing the coating film is provided.

  According to the 2nd side surface of this invention, the adhesive label which comprised the collation element which concerns on a 1st side surface, and the adhesion layer which faced the said collation element is provided.

  According to the third aspect of the present invention, there is provided a transfer foil comprising a transfer material layer including the collating element according to the first aspect, and a base material that releasably supports the transfer material layer.

  According to the 4th side surface of this invention, the labeled article which comprised the collation element which concerns on a 1st side surface, and the goods by which the said collation element was affixed is provided.

  According to the present invention, a matching technique that can be used in various articles is provided.

The top view which shows roughly the collation element which concerns on 1 aspect of this invention. The top view which expands and shows a part of collation element shown in FIG. Sectional drawing along the III-III line of the collation element shown in FIG. Sectional drawing along the IV-IV line of the collation element shown in FIG. The enlarged photograph of the gradation image which the random pattern of the collation element shown in FIG. 1 displays. Fig. 6 is a further enlarged photograph of the gradation image shown in Fig. 5. The figure which shows an example of the binary image formed by binarizing the gradation image shown in FIG. The figure which shows the other example of the binary image formed by binarizing the gradation image shown in FIG. Sectional drawing which shows an example of transfer foil roughly. Sectional drawing which shows an example of an adhesive label roughly. Sectional drawing which shows the other example of transfer foil roughly. Sectional drawing which shows the other example of an adhesive label schematically. Sectional drawing which shows the further another example of an adhesive label roughly. Sectional drawing which shows the further another example of an adhesive label roughly. The top view which shows an example of a labeled article schematically. The figure which shows an example of the collation method using a network.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same referential mark is attached | subjected to the component which exhibits the same or similar function through all the drawings, and the overlapping description is abbreviate | omitted.

  FIG. 1 is a plan view schematically showing a verification element according to one aspect of the present invention. FIG. 2 is an enlarged plan view showing a part of the verification element shown in FIG. 3 is a cross-sectional view of the verification element shown in FIG. 2 taken along the line III-III. 4 is a cross-sectional view of the verification element shown in FIG. 1 taken along line IV-IV.

  The verification element 10 shown in FIGS. 1 to 4 is used for, for example, authenticity determination of an article. Alternatively, the verification element 10 can be used as a key for releasing restrictions on acquisition and registration of information, or for opening and closing a lock provided on a door and a lid.

  When the verification element 10 is used for authenticity determination of an article, the verification element 10 is supported by an article as a genuine product. Here, as an example, the verification element 10 is used by being attached to an article.

  As shown in FIGS. 3 and 4, the verification element 10 includes a first protective layer 110, a random pattern 120, a second protective layer 130, a reflective layer 140 a, and print layers 150 a and 150 b. .

  The first protective layer 110 is a layer located on the outermost surface when the verification element 10 is attached to an article. The protective layer 110 has optical transparency and is typically transparent. The protective layer 110 protects the random pattern 120 and the printed layers 150a and 150b from damage.

The print layer 150a is a print pattern formed on the protective layer 110 as shown in FIG. The print layer 150a is, for example, a black colored layer. The print layer 150a includes a code pattern for displaying the image I _C shown in FIG.

The code pattern displays a code individually given to the verification element 10. In the example shown in FIG. 1, the code pattern displays a one-dimensional code as an image I _C. The code pattern may display a two-dimensional code and at least one of characters such as numerals and alphabets instead of or in addition to the one-dimensional code.

As shown in FIG. 4, the print layer 150b covers a part of the protective layer 110 and the print layer 150a. Print layer 150b is opened at the position of image I _R shown in FIG.

The print layer 150b is a layer that displays a color different from the print layer 150a, for example, white. The image displayed by the print layer 150b constitutes the background of the image I _C shown in FIG. As will be described later, the printing layers 150a and 150b can be omitted.

  As shown in FIGS. 3 and 4, the random pattern 120 is a layer formed on the protective layer 110 and the print layer 150 b. A portion of the random pattern 120 positioned on the print layer 150b can be omitted.

  As shown in FIGS. 3 and 4, the random pattern 120 includes a first portion having a large thickness, a second portion having a continuously changing thickness, and a third portion having a small thickness. Yes. The first, second, and third portions of the random pattern 120 correspond to the areas A1, A2, and A3 in FIGS. 2 and 3, respectively.

  3 and 4, the dimensions of the random pattern 120 are significantly enlarged in the vertical direction for easy understanding. For example, when the thickness of the first portion is about 1 to 5 μm and the thickness of the third portion is about 0 to 1 μm, the diameter of the region A2 is several hundred μm, and the diameter of the region A3 is several hundred μm. .

The random pattern 120 includes a cured resin and a pigment and / or dye. Here, as an example, the random pattern 120 is made of a mixture of a cured resin and a white pigment. Such random pattern 120, the matching element 10 is illuminated with white light, when the regular reflection light is observed under conditions which are not perceived, and displays an image I _R shown in FIG.

The image I _R is a gradation image and has a brightness distribution corresponding to the thickness distribution of the random pattern 120. Specifically, the image I _R is dark in the thickness is small portion of the random pattern 120, bright in thickness is small portion of the random pattern 120.

  Note that the random pattern 120 may not include a pigment and a dye. For example, the random pattern 120 may include a functional material other than the pigment and the dye instead of the pigment and the dye. Alternatively, the random pattern 120 may further include a functional material other than the pigment and the dye in addition to at least one of the pigment and the dye.

  Examples of the functional material include materials that impart optical characteristics such as infrared absorbing materials, fluorescent materials, ultraviolet absorbing materials, liquid crystal particles, and silica; materials that impart electrical characteristics such as antistatic agents and conductive materials. Materials that impart magnetic properties such as magnetic powder; materials that impart design properties such as aluminum powder and glass particles; or combinations of two or more thereof can be used.

  The second protective layer 130 is formed on the random pattern 120. The protective layer 130 has optical transparency and is typically transparent. The protective layer 130 includes a cured resin and serves to prevent the random pattern 120 from falling off the protective layer 110. The protective layer 130 can be omitted.

  The reflective layer 140a covers the protective layer 130. The reflective layer 140a is made of, for example, a metal or an alloy. As the reflective layer 140a, a transparent dielectric layer having a single layer structure or a multilayer structure may be used. The reflective layer 140a can be omitted.

The image I _R displayed by the random pattern 120 of the verification element 10 has the characteristics described below.

  FIG. 5 is an enlarged photograph of the gradation image displayed by the random pattern of the matching element shown in FIG. FIG. 6 is a further enlarged photograph of the gradation image shown in FIG.

The photograph shown in FIG. 5 illuminates the protective layer 110 of the verification element 10 with white light from a direction forming an angle of 45 ° with respect to the normal line, and the image I _R shown in FIG. It was obtained by imaging. The photograph shown in FIG. 6 is an enlarged view of a part of the photograph shown in FIG.

  In the photographs shown in FIGS. 5 and 6, the bright part corresponds to the area A1 shown in FIGS. 2 and 3, the dark part corresponds to the area A3 shown in FIGS. 2 and 3, and the intermediate brightness part is shown in FIG. 2 and region A2 shown in FIG.

  As can be seen from FIGS. 5 and 6, the regions A2 and A3 have irregular shapes and are unevenly distributed. In at least part of the area A2, the brightness continuously decreases from the area A1 toward the area A3.

When binarizing the image I _R has such a feature, the binary image varies depending on the size of the threshold value to be set when the binarization is obtained.

  FIG. 7 is a diagram showing an example of a binary image obtained by binarizing the gradation image shown in FIG. FIG. 8 is a diagram showing another example of a binary image formed by binarizing the gradation image shown in FIG.

In the binarization for obtaining the binary image I _R 1 shown in FIG. 7, the first threshold is set for the brightness of the image. On the other hand, in binarization for obtaining the binary image I _R 2 shown in FIG. 8, a second threshold value larger than the first threshold value is set for the brightness of the image.

Although the binary image I _R 1 shown in FIG. 7 and the binary image I _R 2 shown in FIG. 8 are obtained from the same gradation image, the patterns formed by the dark portions are different. ing. Further, when a threshold value different from the first and second threshold values is set in binarization, a binary image in which the pattern formed by the dark part is different from the binary images I _R 1 and I _R 2 is obtained. That is, different binary images are obtained according to the size of the threshold.

  The random pattern 120 of the collation element 10 can be used like a fingerprint or a retina for personal identification, as will be described later. As will be described later, the collating element 10 can employ a structure that is easily broken when it is peeled off from the article. That is, even when the verification element 10 is used by being affixed to an article, it is unlikely to be forged or altered. Therefore, this verification technique can be used for various articles.

  Next, the collating element 10 and a method for manufacturing a labeled article including the collating element 10 will be described. Here, as an example, a manufacturing method using a transfer foil will be described.

  FIG. 9 is a cross-sectional view schematically showing an example of the transfer foil. In FIG. 9, the random pattern 120 is drawn as a layer having a flat surface for simplification.

  When the transfer foil 20 shown in FIG. 9 is manufactured, first, a support 210 is prepared. As the support 210, a film having a relatively high heat resistance such as a polyethylene terephthalate film is used. A release layer containing, for example, a fluororesin or a silicone resin may be provided on the surface of the support 210.

  Next, the protective layer 110 is formed on the support 210. For example, a resin is applied on the support 210. As this resin, for example, an acrylic resin, a urethane resin, or an epoxy resin is used. Moreover, you may provide the peeling layer (not shown) formed so that it could peel thermally between the protective layer 110 and the support body 210 as needed.

  Next, the printing layers 150 a and 150 b are sequentially formed on the protective layer 110. The printing layer 150a is formed by, for example, an inkjet recording method or a thermal transfer recording method using a thermal head. The printing layer 150b is formed by, for example, an offset printing method, a gravure printing method, a screen printing method, a flexographic printing method, a relief printing method, a thermal transfer recording method using a hot stamp, a thermal transfer recording method using a thermal head, or an inkjet recording method. Form.

  Here, the code pattern is configured by the printing layer 150a, but the code pattern may be formed by other methods. For example, the code pattern may be formed by laser engraving in which the material is carbonized by irradiating a laser beam. Alternatively, the code pattern may be formed by forming a layer containing a heat-sensitive color former and drawing on this layer with a laser beam.

  Further, the code pattern may be omitted from the verification element 10. For example, if the article supporting the verification element 10 includes a code pattern, the verification element 10 may not include the code pattern.

  Thereafter, the random pattern 120 is formed on the protective layer 110 and the printing layer 150b by the method described below.

  First, an emulsion containing a solvent, a polymerizable and / or crosslinkable material, a pigment and / or dye, and a liquid additive is prepared. Specifically, the continuous phase contains a solvent, a polymerizable and / or crosslinkable material, and a pigment and / or dye, and the dispersed phase prepares an emulsion containing a liquid additive.

  As the solvent, any of a non-aqueous solvent and water can be used. Examples of the non-aqueous solvent include aromatic compounds such as benzene, toluene, xylene, normal hexane, mineral terpene, Solvesso 100, and Solvesso 150; methanol, ethanol, isopropyl alcohol, normal butanol, isobutanol, and 3-methyl 3-methoxy. Alcohols such as butanol; ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, diacetone alcohol and cyclohexanone; such as ethyl acetate, normal butyl acetate, isobutyl acetate, cellosolve acetate (ethylene glycol monoethyl ether acetate) and propylene glycol monomethyl ether acetate Esters; butyl cellosolve (ethylene glycol monobutyl ether, butyl glycol) and ethyl celloso Use or a mixture of two or more thereof; Bed ethers such as (ethylene glycol monoethyl ether).

  As the polymerizable and / or crosslinkable material, for example, a polymer compound, a monomer or a low polymer thereof, or a mixture thereof is used. For example, a thermoplastic resin such as an acrylic resin and a polyester resin, a thermosetting resin such as an amino resin and a two-component polyurethane resin, or a photocurable resin such as an ultraviolet curable resin is used as the polymerizable and / or crosslinkable material. .

  The polymerizable and / or crosslinkable material is dissolved in a solvent. Therefore, the polymerizable and / or crosslinkable material and the solvent are selected so as to exhibit high compatibility. For example, when the polymerizable and / or crosslinkable material does not have a hydrophilic group, a non-aqueous solvent with low polarity is used. When the polymerizable and / or crosslinkable material is a water-soluble resin, a polar solvent such as water is used.

  The mass ratio of the polymerizable and / or crosslinkable material to the solvent is, for example, in the range of 10 to 55% by mass, and typically in the range of 25 to 40% by mass.

  The pigment and / or dye is dispersed or dissolved in a solvent. Although a dye may be used, the pigment is excellent in durability as compared with the dye.

As the pigment, an organic pigment, an inorganic pigment, or a mixture thereof is used.
Examples of inorganic pigments include titanium oxide (TiO ₂ ), zinc white (ZnO), carbon black (C), graphite (C), iron black (Fe ₃ O ₄ ), bengara (Fe ₂ O ₃ ), red lead (Pb ₃ O ₄ ), molybdate orange (PbCrO ₄ · nPbMoO ₄ mPbSO ₄ ), yellow lead (PbCrO ₄ · nPbSO ₄ ), yellow iron oxide (FeOOH), titanium yellow (TiO ₂ · NiO ₂ · Sb ₂ O ₃ ), Chrome green (mixture of yellow lead and bitumen), chromium oxide (Cr ₂ O ₃ ), bitumen (KFe [Fe (CN) ₆ ]), ultramarine (2 (Na ₂ O · Al ₂ O ₃ · 2SiO ₂ )) · Na ₂ S _3), manganese violet _{((NH 4) Mn (P} 2 O7)), aluminum powder (Al), an alloy of bronze powder (Cu and Zn), mica, aluminum oxide (Al ₂ O ₃ ), silicon dioxide (SiO _2), O Shi bismuth chloride, glass particles, fluorescent pigments, magnesium carbonate (MgO), kaolin, and other composite oxide, or to use a mixture of two or more thereof.

Examples of organic pigments include monoazo pigments such as naphthol carmine, permanent red, bon maroon, bordeaux, naphthol red, toluidine red and first yellow; condensed azo pigments such as condensed azo red, condensed azo scarlet and condensed azo yellow; Disazo pigments such as yellow; quinacridone pigments such as quinacridone scarlet, quinacridone maroon, quinacridone magenta and quinacridone gold; pyranthrone pigments such as pyranthrone red; dibromoanthanthrone pigments such as dibromoanthanthrone red; Thioindigo pigments such as Bordeaux; perylene pigments such as perylene red, perylene maroon and perylene scarlet; benzimidazolone orange, etc. Benzimidazolone pigments; perinone pigments such as perinone orange; metal complex azomethine pigments such as copper azomethine yellow; benzimidazolone pigments such as benzimidazolone yellow; isoindolinone pigments such as isoindolinone yellow Anthrapyrimidine pigments such as anthrapyrimidine yellow; flavantron pigments such as flavantron yellow; quinophthalone pigments such as quinophthalone yellow; metal complex azo pigments such as nickel azo yellow; phthalocyanine pigments such as phthalocyanine green; Copper phthalocyanine pigments such as brominated copper phthalocyanine green; copper-free phthalocyanine pigments such as metal-free phthalocyanine blue; indantrons such as indantron blue Charge; to use a mixture of two or more thereof; dioxane-based pigments such as dioxazine violet; quinacridone quinacridone pigments such as Don Red other organic pigments.
The pigment may be subjected to a surface treatment in order to improve its dispersibility.

  The ratio of the pigment or dye mass to the dry mass of the emulsion varies depending on the appearance and color tone required for the random pattern 120. For example, when titanium oxide is used as the pigment, white can be displayed in the random pattern 120 when the ratio of the mass of the pigment or dye to the dry mass of the emulsion is about 40%.

  Liquid additives are less compatible with solvents compared to polymerizable and / or crosslinkable materials. Typically, the liquid additive is insoluble in the solvent and insoluble in the mixture containing the solvent and the polymerizable and / or crosslinkable material. Liquid additives are non-polymerizable and non-crosslinkable and are non-reactive with other components in the emulsion.

  Examples of the liquid additive include silicone additives such as silicone oil, fluorine additives such as polytetrafluoroethylene oil, wax additives such as polyethylene wax, and fat additives such as animal and vegetable oils and mineral oils. A combination of them can be used.

  The ratio of the mass of the liquid additive to the dry mass of the emulsion is, for example, in the range of 0.1 to 0.5%.

  The emulsion may further contain additives that are soluble in the solvent. For example, the emulsion may further contain an additive that enhances the dispersibility of the pigment.

Next, this emulsion is supplied onto the protective layer 110 and the printed layer 150b. For example, this emulsion is applied on the protective layer 110 and the printing layer 150b. Thereby, a coating film is formed. This coating film is formed so that the ratio of the mass of the random pattern 120 to the area of the base is in the range of, for example, 1.0 to 2.0 g / m ² .

  Subsequently, the coating film is dried. For example, drying is performed at 190 ° C. for 20 seconds. As described above, the random pattern 120 is obtained.

  As shown in FIGS. 3 and 4, the random pattern 120 obtained in this manner includes a first portion having a large thickness, a second portion having a continuously changing thickness, and a first portion having a small thickness. 3 parts. The second and third portions have irregular shapes and are unevenly distributed. This irregularity is not an artificially generated phenomenon, but is a naturally occurring property. Then, the probability that the shape and arrangement of the second and third parts observed for a certain random pattern 120 and the shape and arrangement of the second and third parts observed for another random pattern 120 are completely the same. It is almost zero. Therefore, the random pattern 120 can be used like a fingerprint or a retina for personal identification.

  The random pattern 120 obtained by this method has a characteristic that cannot be obtained when a similar pattern is formed by another method.

For example, the random pattern 120 has a variation in thickness, and displays a grayscale image I _R corresponding to variation in the thickness. That the image I _R is gradation image, for example it can be confirmed even when viewed at 50 times magnification. That is, the portion displaying the halftone is relatively large. In other words, the thickness of the random pattern 120 does not change steeply in the in-plane direction but changes gently. It is impossible or difficult to reproduce such a structure by a process using patterning such as photolithography.

  In addition, a small amount of pigment may exist in the third portion of the random pattern 120. It is impossible or difficult to reproduce such a structure by a process using patterning such as photolithography.

  Next, the protective layer 130 is formed on the random pattern 120. The protective layer 130 is obtained, for example, by applying a resin on the random pattern 120 and curing it.

  Subsequently, the reflective layer 140 a is formed on the protective layer 130. The reflective layer 140a is formed by, for example, a vapor deposition method such as a vacuum evaporation method or a sputtering method. The reflective layer 140a may be formed by applying a resin containing small pieces made of metal or alloy on the protective layer 130 and curing it.

  Further, an adhesive layer 220 is formed on the reflective layer 140a. As a material of the adhesive layer 220, for example, a thermoplastic resin is used.

  The transfer foil 20 is completed as described above. The transfer foil 20 includes a support 210 and a transfer material layer that is releasably supported by the support 210. The transfer material layer includes a protective layer 110, printing layers 150a and 150b, a random pattern 120, a protective layer 130, a reflective layer 140a, and an adhesive layer 220.

  Thereafter, a part or the whole of the transfer material layer is thermally transferred from the support 210 onto the article. In this way, the verification element 10 attached onto the article via the adhesive layer 220 is obtained. That is, an article with a label in which the verification element 10 is supported on the article is obtained.

  The labeled article including the verification element 10 can be manufactured using an adhesive label instead of using the transfer foil 20.

FIG. 10 is a cross-sectional view schematically showing an example of an adhesive label.
An adhesive label 30 shown in FIG. 10 includes a verification element 10 and an adhesive layer 320. The adhesive layer 320 covers the back surface of the verification element 10.

  The verification element 10 is the same as the verification element 10 described with reference to FIGS. 1 to 4 except for the following points. That is, the verification element 10 includes a protective layer 110 ′ instead of the protective layer 110. The verification element 10 further includes a brittle layer 160.

  The protective layer 110 'is light transmissive and typically transparent. The protective layer 110 'protects the random pattern 120 and the printed layers 150a and 150b from damage. In addition, the protective layer 110 'serves as a base material that supports the random pattern 120, the printed layers 150a and 150b, and the like.

  The brittle layer 160 is interposed between the protective layer 110 ', the random pattern 120, and the print layers 150a and 150b. The brittle layer 160 is light transmissive and typically transparent. The brittle layer 160 is a layer that causes brittle fracture when the verification element 10 attached to the article is peeled from the article. Providing the brittle layer 160 can make unauthorized use of the verification element 10 difficult.

  The adhesive label 30 before being affixed to an article is typically affixed to release paper. The adhesive label 30 is peeled off from the release paper when the labeled article is manufactured, and attached to the article.

  The transfer foil 20 shown in FIG. 9 and the adhesive label 30 shown in FIG. 10 can be variously modified.

FIG. 11 is a cross-sectional view schematically showing another example of the transfer foil.
The transfer foil 20 shown in FIG. 11 includes a colored layer 150 instead of the printed layers 150a and 150b, and further includes a diffraction structure forming layer 170, a reflective layer 140b, and a mask layer 180, see FIG. However, this is the same as the transfer foil 20 described above.

The colored layer 150 is interposed between the protective layer 130 and the reflective layer 140a. The colored layer 150 has light transmittance and is typically transparent. Colored layer 150 serves to color the dark portion of the image I _R shown in FIG. When the colored layer 150 is provided, the reflective layer 140a can be omitted. Further, when the reflective layer 140a is omitted, the colored layer 150 may be light-shielding.

  The diffractive structure forming layer 170 is interposed between the protective layer 110 and the random pattern 120. The diffractive structure forming layer 170 has optical transparency and is typically transparent. A relief type diffraction grating or hologram is provided on the surface of the diffraction structure forming layer 170 facing the random pattern 120. As described above, when a diffraction structure such as a diffraction grating and a hologram is provided, forgery of the verification element 10 becomes more difficult.

The reflective layer 140b partially covers the surface of the diffraction structure forming layer 170 on which the diffraction grating or hologram is provided. The reflective layer 140b increases the diffraction efficiency of the diffractive structure. Incidentally, the matching element 10 resulting from the transfer foil 20 is at a position corresponding to the opening of the reflective layer 140b, and displays the image I _R shown in FIG.

  The reflective layer 140b is made of, for example, a metal or an alloy. A transparent dielectric layer having a single layer structure or a multilayer structure may be used as the reflective layer 140b.

  The mask layer 180 covers the diffractive structure forming layer 170 and the reflective layer 140b. Mask layer 180 is light transmissive and typically transparent. The mask layer 180 serves to provide a flat base for the random pattern 120. If the portion of the diffractive structure forming layer 170 that is not covered with the reflective layer 140b has a flat surface, it is not necessary to provide the mask layer 180 on this portion.

FIG. 12 is a cross-sectional view schematically showing another example of an adhesive label.
The adhesive label 30 shown in FIG. 12 includes a colored layer 150 instead of the printed layers 150a and 150b, and further includes a protective layer 110, a diffractive structure forming layer 170, a reflective layer 140b, an adhesive layer 100, and an anchor layer 190. Other than that, the adhesive label 30 is the same as that described with reference to FIG.

The laminated body of the protective layer 110, the diffractive structure forming layer 170, the reflective layer 140b, and the adhesive layer 100 is bonded onto the anchor layer 190 by, for example, thermal transfer using a transfer foil. This laminate has an opening is provided, matching element 10, at the location of the opening, to display an image I _R shown in FIG. The adhesive layer 100 is made of, for example, a thermoplastic resin.

  Anchor layer 190 is interposed between adhesive layer 100 and substrate 110 '. The anchor layer 190 enhances the adhesion between the above-described laminate and the substrate 110 '.

  When the diffractive structure is provided on the adhesive label 30, as described with reference to FIG. 12, a laminate including the diffractive structure may be attached to the base 110 'using, for example, a transfer foil. Alternatively, as is clear from the description with reference to FIG. 11, a laminate including a diffractive structure, a mask layer 180, and a random pattern 120 may be sequentially formed on the substrate 110 '.

FIG. 13 is a cross-sectional view schematically showing still another example of an adhesive label.
The adhesive label 30 shown in FIG. 13 includes a colored layer 150 and a printed layer 150c instead of the printed layers 150a and 150b, and further includes an anchor layer 190. The adhesive label 30 described with reference to FIG. It is the same.

The printed layer 150 c partially covers the back surface of the brittle layer 160. Matching element 10, at the location of the opening of the printed layer 150c, to display an image I _R shown in FIG.

  The print layer 150c is obtained by printing optically variable ink. The appearance of the layer obtained from the optically variable ink changes depending on the observation angle. As the optically variable ink, for example, a mixture of a pulverized dielectric multilayer film and a resin can be used. As described above, when the printing layer 150c made of optically variable ink is provided, forgery of the verification element 10 becomes more difficult.

  The anchor layer 190 is interposed between the brittle layer 160 and the printed layer 150 c and the random pattern 120. The anchor layer 190 increases the adhesion of the random pattern 120 to the brittle layer 160 and the printed layer 150c.

FIG. 14 is a cross-sectional view schematically showing still another example of an adhesive label.
The adhesive label 30 shown in FIG. 14 includes a colored layer 150 and a printed layer 150d instead of the printed layers 150a and 150b, and includes the substrate 110 ″ instead of the substrate 110 ′. This is the same as the pressure-sensitive adhesive label 30 described with reference.

  The substrate 110 ″ is an optically variable film. The appearance of the optically variable film changes depending on the observation angle. As the optically variable film, for example, a dielectric multilayer film can be used. Alternatively, a cholesteric liquid crystal layer in which molecules are fixed may be used as the optically variable film. As described above, when the optical variable film is used as the base material 110 ″, forgery of the verification element 10 becomes more difficult.

The printed layer 150d partially covers the back surface of the brittle layer 160. Matching element 10, at the location of the opening of the printed layer 150d, and displays the image I _R shown in FIG.

  The print layer 150d is a colored layer, and typically has a dark color such as black. The printed layer 150d plays a role of enhancing the visual effect of the optical variable film. The print layer 150d may be omitted.

FIG. 15 is a plan view schematically showing an example of a labeled article.
The labeled article 1 shown in FIG. 15 includes a verification element 10 and an article 40 that supports the matching element 10. The verification element 10 is affixed to the article 40.

  The article 40 has a possibility of authenticity determination. The article 40 is, for example, a certificate such as an identification card and a license, securities, industrial products such as electric products, crafts, arts, or a package formed by packaging these with packaging materials.

  The matching element 10 may instruct the article 40 by other methods. For example, the verification element 10 may be supported on the article as a tag through a coupling tool such as a chain, string, or ring. Alternatively, the verification element 10 may be embedded in an article.

This verification element 10 is used for authenticity determination of an article by the following method, for example.
FIG. 16 is a diagram illustrating an example of a collation method using a network.

  When using the verification element 10 for authenticity determination of an article, the manufacturer M shown in FIG. 16 attaches the verification element 10 to the article 40 by attaching the verification element 10 to the article 40 as shown in FIG. Support. Thereby, the labeled article 1 as a genuine product is manufactured.

Further, the manufacturer M shown in FIG. 16 displays the code assigned to the verification element 10, that is, the image I _C shown in FIG. 1 after the verification element 10 is supported on or supported by the article 40. code, the gradation image I _R to the random pattern 120 of the matching device 10 displays, are registered in the database of the server S.

Instead of registering the gradation image I _R, 1 or more binary image of the gray-scale image I _R obtained by binarizing, for example, binary shown in binary image I _R 1 and 8 shown in FIG. 7 At least one of the images I _R 2 may be registered in the database. Each binary image, when compared with the gradation image I _R, considerably less information. Therefore, even when registering a plurality of binary images, as compared to the case of registering a gradation image I _R, it is possible to greatly reduce the load on the a server S and the network.

Alternatively, instead of registering the gradation image I _R to the database, for each of the one or more binary images the gradation image I _R obtained by binarization may register the identification information to the database. The “identification information” includes, for example, information indicating which of a plurality of positions in the binary image is a dark part or a bright part. Each piece of identification information has a smaller amount of information than a binary image. Therefore, in this case, the load on the server S and the network can be further reduced.

  The wholesaler D registers information related to the delivered labeled article 1, for example, the delivery date and the shipping date, in the database of the server S.

  For example, when there is a doubt about the authenticity of the obtained article, the consumer C determines the authenticity of the article by the following method.

First, it is determined whether or not this article is a labeled article provided with the verification element 10. For example, since the matching element 10 described with reference to FIGS. 1 to 4 includes the reflective layer 140a, the conditions under which the specularly reflected light from the reflective layer 140a can be observed, and the conditions under which the specularly reflected light cannot be observed, in, the appearance of the image I _R shown in FIG. 1 are different. Therefore, even if the article includes an element similar to that described with reference to FIGS. 1 to 4, if the image displayed by the element does not change by changing the observation conditions, the article Can be determined not to include the verification element 10 described with reference to FIGS.

The images I _C and I _R are then optically machine read. Next, the code is decoded from the read image I _C, and the gradation image I _R registered together with this code in the database of the server S shown in FIG. 16 is compared with the optically machine-read image I _R.

Image I _R which optically machine-readable may be binarized. Further, identification information similar to that described above may be further generated from the binary image thus generated. Then, a binary image or identifying information derived from image I _R which optically machine-readable while the may be compared to the binary image and the identification information registered in the database. Alternatively, a binary image is generated from the gradation image I _R registered in the database, or the identification information is further generated from the binary image, and the binary derived from the image I _{R obtained} by optically machine reading this. You may contrast with one of an image and identification information.

  As a result of the comparison, for example, if the matching ratio falls below a certain value, it is determined that the labeled article is a counterfeit. Further, for example, if the matching ratio is equal to or higher than the previous value, it is determined that the labeled article is an authentic product.

If you binarizing the image I _R which optically machine-readable in this method, the threshold value for this binarization, for example, set to a value which is determined in advance. If a plurality of threshold values are set and a binary image or identification information obtained with each threshold value is used for the above comparison, the accuracy of true / false determination is improved. Further, forgery who does not know to use a plurality of threshold values for authenticity determination makes forgery more difficult.

In this way, when registering the gradation image I _R to the database, the threshold value for binarizing the image I _R which optically machine-readable may be set to a value which is determined in advance, It may be set to a value obtained by using random number generation every time the comparison is performed.

  Examples of the present invention will be described below.

  45 parts by mass of an acrylic polyol, 20 parts by mass of an isocyanate curing agent, 20 parts by mass of an organic solvent, 0.5 parts by mass of a silicon-based additive, and 15 parts by mass of a white pigment An emulsion was prepared. Here, a plus coat RD Clear B liquid (manufactured by Washin Chemical Industry Co., Ltd.) having a heating residue of 35% by mass as an acrylic polyol is used, and a plus coat RD clear having a heating residue of 35% by mass as an isocyanate curing agent. A liquid (made by Washin Chemical Industry Co., Ltd.) was used. In addition, xylol and methyl ethyl ketone were used as the organic solvent, plus coat RD additive (manufactured by Washin Chemical Industry Co., Ltd.) was used as the silicon additive, and titanium oxide was used as the white pigment.

Next, this emulsion was applied onto a polyethylene terephthalate film. This application was performed such that the ratio of the mass of the dried coating film to the area of the base was 1.0 to 4.5 g / m ² .

  Thereafter, the coating film was dried at 190 ° C. for 20 seconds. In this way, a random pattern was formed on the polyethylene terephthalate film.

Subsequently, plus coat R-LK clear (manufactured by Washin Chemical Industry Co., Ltd.) was applied on the random pattern. This application was performed such that the ratio of the mass of the dried coating film to the area of the base was 1.0 to 2.0 g / m ² .

  The coating was then dried at 190 ° C. for 30 seconds. In this way, the random pattern was covered with the protective layer.

  Thereafter, a reflective layer made of aluminum was formed on the protective layer by vapor deposition. As described above, the verification element was completed.

  An image displayed by the verification element was captured at a magnification of 50 times using a charge coupled device image sensor. As a result, an image similar to that shown in FIGS. 5 and 6 was obtained.

DESCRIPTION OF SYMBOLS 1 ... Labeled article, 10 ... Collating element, 20 ... Transfer foil, 30 ... Adhesive label, 40 ... Article, 100 ... Adhesive layer, 110 ... Protective layer, 110 '... Protective layer, 110 "... Base material, 120 ... Random pattern, 130 ... protective layer, 140a ... reflective layer, 140b ... reflective layer, 150 ... colored layer, 150a ... printed layer, 150b ... printed layer, 150c ... printed layer, 150d ... printed layer, 160 ... brittle layer, 170 ... diffractive structure layer, 180 ... mask layer, 190 ... anchor layer, 210 ... substrate, 320 ... adhesive layer, A1 ... area, A2 ... area, A3 ... area, C ... consumer, D ... wholesaler, I _C ... Image, I _R ... Image, I _R 1 ... Image, I _R 2 ... Image, M ... Manufacturer, S ... Server.

Claims (11)

  A continuous phase containing a solvent and a polymerizable and / or crosslinkable material dissolved in the solvent, and a liquid additive having a lower compatibility with the solvent compared to the polymerizable and / or crosslinkable material A collating element comprising a random pattern obtained by forming a coating film from an emulsion comprising a dispersed phase and curing the coating film.   The collating element according to claim 1, wherein a binary image obtained by binarizing a gradation image obtained by optically reading the random pattern changes according to a threshold value used for the binarization.   The collating element according to claim 1, wherein the random pattern includes a cured product of the polymerizable and / or crosslinkable material and a pigment and / or a dye dispersed in the cured product.   The collating element according to claim 3, further comprising a specular reflection layer facing the random pattern, wherein the random pattern includes a white pigment as the pigment and / or dye.   The random pattern includes a cured product of the polymerizable and / or crosslinkable material and a fluorescent material dispersed in the cured product, and corresponds to the random pattern when illuminated with white light and observed with the naked eye The collating element according to claim 1, wherein the image is not displayed.   An image corresponding to the random pattern is displayed when illuminated with infrared light and observed with an infrared camera, and an image corresponding to the random pattern is not displayed when illuminated with white light and observed with the naked eye Item 3. The verification element according to item 1 or 2.   The collating element according to any one of claims 1 to 6, further comprising a code pattern for displaying a character and / or a code assigned to the random pattern.   The verification element according to claim 1, wherein the liquid additive includes a silicon-based additive. A verification element according to any one of claims 1 to 8,
An adhesive label comprising an adhesive layer facing the verification element. A transfer material layer comprising the verification element according to any one of claims 1 to 8,
The transfer foil which comprised the base material which supported the said transfer material layer so that peeling was possible. A verification element according to any one of claims 1 to 8,
A labeled article comprising an article to which the verification element is attached.

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