JP5825959B2 - Label, adhesive label and printed matter - Google Patents

Description

  The present invention relates to a label that can be used for preventing forgery, for example, and an adhesive label and printed matter including the label.

  In recent years, the distribution of counterfeit products has become a major social problem. Therefore, for example, a label may be attached to an article so that it can be confirmed that the article is genuine. Such a label, so-called anti-counterfeit label, is formed by a special printing such as a label including a printing layer formed by a functional ink such as fluorescent ink and OVI (optically variable ink), micro printing and intaglio printing, for example. There are labels including printed layers, labels including holograms or diffraction gratings, labels written with information by magnetic recording, and labels including IC (integrated circuit) tags.

  Many of these anti-counterfeit labels are difficult to counterfeit themselves. However, some anti-counterfeit labels can be peeled off relatively easily from the article on which they are attached. Such labels can be used for fraudulent activities such as peeling off used articles and attaching them to counterfeit goods.

  Some forgery prevention labels have taken measures to make their reuse impossible.

  For example, some forgery prevention labels are provided with notches. Such an anti-counterfeit label is designed to tear from the position of the notch when it is peeled off from the article to which it is applied.

  There are also anti-counterfeit labels in which the base material causes brittle fracture with a relatively small force. Such labels are also designed so that they will be destroyed if they are to be peeled off from the article to which they are applied.

  Further, there is a forgery prevention label that includes a brittle layer that causes brittle fracture with a relatively small force, and the adhesive strength between the brittle layer and a layer adjacent to the surface on the viewer side varies depending on the place. When such a label is peeled off from the article to which it is attached, the brittle layer is broken in a pattern corresponding to the adhesive strength distribution. As a result, for example, a part of the brittle layer or the like remains on the article in a pattern corresponding to the character string “VOID”, and a brittle layer or the like of the anti-counterfeit label has a missing part of the pattern corresponding to the character string “VOID”. Arise.

  These anti-counterfeit labels are not reusable or difficult when peeled off from the article by peeling off. However, these anti-counterfeit labels may be peeled without damaging the label body when an organic solvent is soaked into the adhesive layer or the adhesive layer.

Some anti-counterfeit labels employ techniques to make this impossible or difficult.
For example, there is an anti-counterfeit label using a mixture of a pressure-sensitive adhesive and a hardly soluble additive as a material for the pressure-sensitive adhesive layer (see, for example, Patent Document 1). When this anti-counterfeit label is peeled off using an organic solvent, the surface of the pressure-sensitive adhesive layer is uneven due to the difference in solubility of the pressure-sensitive adhesive and the additive to the organic solvent.

  There is also a forgery prevention label whose printing layer contains a dye soluble in an organic solvent (see, for example, Patent Document 2). When the anti-counterfeit label is to be peeled off using an organic solvent, the dye oozes from the printed layer.

  In addition, this label can be peeled without damaging the label main body or bleeding of the dye by warming the surface with a dryer or the like. An example of the anti-counterfeit label taking measures against peeling by heating is, for example, an anti-counterfeit label in which foamed particles that are foamed by heating are contained in an adhesive layer (see, for example, Patent Document 3).

  These anti-counterfeit labels cannot be reused or are difficult when peeled off using an organic solvent or heat. However, for articles that have expired, the possibility that the anti-counterfeit label is removed together with the surface layer of the article to which it has been applied must be considered. The measures described above cannot prevent the reuse of the anti-counterfeit label thus removed.

JP 2005-266147 A JP-A-10-204363 JP 2000-293108 A

  An object of the present invention is to make it possible to prevent a label attached to an article from being reused after the period of use of the article has ended.

  According to the first aspect of the present invention, a base material having a front surface and a back surface, an optical functional layer facing the front surface and transmitting light of a certain wavelength, and between the base material and the optical functional layer A scratch layer that transmits or reflects the light having the wavelength, and is interposed between the optical function layer and the scratch layer, or the scratch layer with the optical function layer interposed therebetween. And when the front surface is scratched in a certain direction, a portion positioned in front of the scratch layer is torn along the direction. , A label configured to peel from the substrate with a portion of the scratch layer is provided.

  According to a second aspect of the present invention, there is provided a label according to the first aspect, wherein the light absorption pattern has the same color as the optical functional layer.

  According to a third aspect of the present invention, there is provided a label according to the first or second aspect, wherein the wavelength is in an infrared region, and the optical functional layer is a black layer.

According to the fourth aspect of the present invention, the wavelength is in the near infrared region, the transmittance of the optical function layer at the wavelength is 30% or more, and the optical function layer is 700 to 700 in the near infrared region. There is provided a label according to the third aspect, wherein the transmittance difference of any wavelength is 10% or more in the wavelength region of 800 nm and the wavelength region of 800 to 1500 nm in the near infrared region.

  According to the fifth aspect of the present invention, the scratch layer includes a resin and a filler dispersed therein, and any one of the first to fourth aspects configured to reflect or scatter light having the wavelength. A label is provided.

  According to the sixth aspect of the present invention, there is provided an adhesive label comprising a label according to any one of the first to fifth aspects and an adhesive layer facing the back surface of the label.

  According to the seventh aspect of the present invention, the label according to any one of the first to fifth aspects, the printing substrate facing the back surface of the label, and the label and the printing substrate are interposed. Thus, a printed matter comprising an adhesive layer in which the label is attached to the printing substrate is provided.

  According to the present invention, it is possible to prevent a label attached to an article from being reused after the period of use of the article is completed.

  In the label according to the first aspect, for example, the reflectance at the wavelength (hereinafter referred to as “first wavelength”) of the laminate including the scratch layer and the substrate is compared with the reflectance at the first wavelength of the light absorption pattern. If the front surface is illuminated with light of the first wavelength, the first image is displayed in which the area corresponding to the light absorption pattern is dark and the other areas are bright. When the invalidation process is performed by scratching the front surface of the label in a certain direction, the portion located in front of the scratch layer is torn along the previous direction and peeled off from the substrate with a part of the scratch layer. To do. Whether or not peeling has occurred can usually be determined by observation with the naked eye. Further, in the portion where peeling occurs, the reflectance at the above wavelength (hereinafter referred to as “first wavelength”) changes. For example, in the portion corresponding to the light absorption pattern, the reflectance increases due to peeling. In other portions, for example, the reflectance decreases due to peeling. Therefore, when the invalidated label is illuminated with light of the first wavelength, a second image having a peeled portion brightness different from that of the first image is displayed. Therefore, for example, when the article to which this label is attached ends its use period, if the invalidation process is performed by scratching the front surface of the label, it is attached to an article whose authenticity is unknown. An image displayed when the label is observed with the naked eye, or when this label is illuminated with light of the first wavelength, and an image displayed when the label before invalidation is illuminated with light of the first wavelength , It is possible to determine the authenticity of the previous article. Accordingly, it is possible to check a person who performs an illegal act, and therefore, it is possible to prevent the label attached to the article from being reused after the use period of the article is ended.

  In the label according to the second aspect, the light absorption pattern has the same color as the optical functional layer. Therefore, it is difficult to realize the existence of the light absorption pattern. Therefore, it is difficult for a person who performs fraud to recognize that the authenticity determination is performed using this label.

  In the label according to the third aspect, the first wavelength is in the infrared region, and the optical functional layer is a black layer. Here, “black” means that, when the intensity of specular reflection light is measured, the reflectance is 10% or less for all light components having a wavelength in the range of 400 nm to 700 nm. Yes.

  When this structure is adopted, when the light absorption pattern is black or is located behind the optical function layer, it is difficult to recognize the presence of the light absorption pattern. That is, it is possible to make it difficult for the person who performs the fraud to realize that the authenticity determination is performed using this label.

The label according to the fourth aspect has the first wavelength in the near-infrared region of the label according to the third aspect, and the optical function layer has a transmittance of 30% or more at the first wavelength. Has a transmittance difference of 10% or more in any wavelength between the wavelength range of 700 to 800 nm in the near infrared region and the wavelength range of 800 to 1500 nm in the near infrared region. That is, the transmission spectrum in the near infrared region of the optical functional layer shows high transmittance at the first wavelength, but low transmittance at many wavelengths. Therefore, it is impossible or difficult for those who try to forge a label.

  The adhesive label which concerns on a 5th side contains the label which concerns on any one of the 1st thru | or 4th side. The pressure-sensitive adhesive label is a form that can be used when the previous label is attached to an article.

  The printed material according to the sixth aspect includes a label according to any one of the first to fourth aspects. The printed material is less likely to be reused after the end of its use period.

The top view which shows the label which concerns on 1 aspect of this invention roughly. Sectional drawing along the II-II line of the label shown in FIG. The figure which shows schematically an example of the image display system which can be used for authenticity determination. The figure which shows schematically an example of the image formed by visualizing the information recorded on the label shown in FIG.1 and FIG.2 with the image display system shown in FIG. The figure which shows schematically an example of the invalidation processing method of the label shown in FIG.1 and FIG.2. The top view which shows roughly an example of the label invalidated by the method shown in FIG. FIG. 6 is a diagram schematically showing an example of an image formed by visualizing information recorded on a label invalidated by the method shown in FIG. 5 by the image display system shown in FIG. 3. Sectional drawing which shows schematically the modification of the label shown in FIG.1 and FIG.2. Sectional drawing which shows an example of an adhesive label roughly. Sectional drawing which shows an example of printed matter roughly.

  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 drawings, and the overlapping description is abbreviate | omitted.

  FIG. 1 is a plan view schematically showing a label according to one embodiment of the present invention. 2 is a cross-sectional view taken along line II-II of the label shown in FIG.

  The label 1 shown in FIGS. 1 and 2 includes a base material 11, a scratch layer 18, an optical functional layer 13, and a light absorption pattern 14. The scratch layer 18, the optical function layer 13, and the light absorption pattern 14 are laminated on the base material 11 in this order. In the label 1, the surface on the light absorption pattern 14 side is the front surface, and the surface on the substrate 11 side is the back surface.

  The base material 11 is a film made of resin, for example. As this resin, plastics such as polyethylene terephthalate, polyethylene naphthalate, polypropylene, polycarbonate, and polyethylene can be used. Alternatively, as the base material 11, paper such as high-quality paper and coated paper, or a metal layer such as aluminum foil can be used. The substrate 11 may have a single layer structure or a multilayer structure.

  The substrate 11 may be transparent or opaque. Moreover, the base material 11 may have light reflectivity or light scattering property, and does not need to have an optical characteristic.

The scratch layer 18 is provided on one main surface of the substrate 11.
When the front surface of the label 1 is scratched in a certain direction, the scratch layer 18 is accompanied by a part of the scratch layer 18 while the portion located in front of the scratch layer 18 tears along the previous direction. It is possible to peel from the substrate 11.

  Moreover, the laminated body of the scratch layer 18 and the base material 11 plays a role as a light reflection layer or a light scattering layer when illuminated with light of the first wavelength from the scratch layer 18 side. The absorptance of the scratch layer 18 at the first wavelength is, for example, in the range of 0 to 20%, and typically in the range of 3 to 10%. And the reflectance in the 1st wavelength of the previous laminated body is in the range of 60 to 90%, for example, and typically in the range of 70 to 80%.

  Here, as an example, the first wavelength is in the near infrared region. Here, the “near infrared region” means a wavelength region of 700 to 1500 nm.

The scratch layer 18 includes a base material protective layer 18a and a release layer 18b.
The base material protective layer 18 a is formed on the base material 11. The base material protective layer 18a prevents the base material 11 from being damaged when the front surface of the label 1 is scratched. Moreover, the base material protective layer 18a facilitates the peeling of the peeling layer 18b.

  When the peeling layer 18b functions as a light reflection layer or a light scattering layer with respect to light having the first wavelength, the base material protective layer 18a is any of transparent, translucent, and opaque with respect to the light having the first wavelength. Also good. When the release layer 18b functions as a light reflection layer or a light scattering layer with respect to light of the first wavelength, and the base material protective layer 18a is transparent to light at the first wavelength, the front surface of the label 1 When the substrate protective layer 18a is exposed by scratching and is illuminated with light of the first wavelength, the label 1 displays an image of the base at the exposed portion of the substrate protective layer 18a.

  The base material protective layer 18a includes, for example, a hard resin and a lubricant. The hard resin is, for example, a cured product of an ultraviolet or electron beam curable acrylic resin. As the lubricant, for example, silicone can be used. The base material protective layer 18a is obtained, for example, by forming a coating film made of a composition containing an ultraviolet ray or electron beam curing type and a lubricant and irradiating the coating film with ultraviolet rays or an electron beam. This coating film is formed by, for example, a coating method or a printing method. Examples of the printing method include an offset printing method, a gravure printing method, a screen printing method, and a flexographic printing method.

  The thickness of the base material protective layer 18a is, for example, in the range of 1 to 10 μm, and typically in the range of 2 to 5 μm. The base material protective layer 18a can be omitted.

  The release layer 18b is formed on the base material protective layer 18a. The peeling layer 18b peels from the base material protective layer 18a when the front surface of the label 1 is scratched.

  The release layer 18b is made of resin, for example. Examples of this resin include rubber-based natural resins such as natural rubber derivatives such as natural rubber and hydrochloric acid rubber, polybutadiene, styrene-butadiene copolymer, acrylonitrile-butadiene copolymer, polyisoprene, polychloroprene, acrylic resin, chloride resin, and the like. Vinyl resin or vinyl chloride-vinyl acetate copolymer can be used.

  When the release layer 18b is used as a light reflecting layer or a light scattering layer, the release layer 18b may further contain a filler. As the filler, a filler made of a metallic material, a filler made of a nonmetallic material, or a combination thereof can be used. As the filler made of a metal material, for example, metal powder such as aluminum powder and copper powder, alloy powder such as brass powder, or a combination thereof can be used. As a powder made of a non-metallic material, for example, a powder made of calcium carbonate, zinc oxide, alumina, titanium dioxide, silica, barium sulfate, talc, kaolin, clay, carbon black, or resin, or a mixture thereof should be used. Can do. The filler contained in the release layer 18b may be a white pigment or a colored pigment. Further, the release layer 18b may contain a dye. Here, as an example, the peeling layer 18b functions as a light reflection layer or a light scattering layer with respect to light of the first wavelength.

  The thickness of the release layer 18b is, for example, in the range of 3 to 30 μm, and typically in the range of 5 to 20 μm.

  The release layer 18b is formed by, for example, a coating method or a printing method. Examples of the printing method include an offset printing method, a gravure printing method, a screen printing method, and a flexographic printing method.

  The release layer 18b is preferably one that can be easily removed when a certain level of force is applied. However, it is not preferable that the release layer 18b be damaged in a normal storage environment or during handling. Therefore, a scratch protection layer (not shown) may be formed on the scratch layer 18.

  The scratch protection layer is made of resin, for example. Examples of the resin include phenol resin, xylene resin, urea resin, melamine resin, ketone resin, alkyd resin, polyamide resin, acrylic resin, polyvinyl chloride resin, vinyl chloride-vinyl acetate copolymer resin, polyvinyl acetate resin, Polyvinyl alcohol resin, polyvinyl butyral resin, polystyrene resin, epoxy resin, or polyurethane resin can be used. The scratch protection layer is obtained, for example, by applying the resin solution and drying the coating film.

  The optical function layer 13 is provided on the scratch layer 18. The optical functional layer 13 transmits light having the first wavelength. The transmittance of the optical function layer 13 with respect to the light of the first wavelength is, for example, 30% or more, and is typically in the range of 30 to 60%.

  The optical functional layer 13 is typically colored. When the optical functional layer 13 is colored, particularly when the optical functional layer 13 is colored black, it becomes impossible or difficult to perceive the structure behind the optical functional layer 13 by observation with the naked eye. It becomes. Moreover, when the optical function layer 13 is the same color as the light absorption pattern 14, it can be made hard to notice the presence of the light absorption pattern 14. Here, as an example, the optical functional layer 13 is assumed to be black.

  When the first wavelength is in the near infrared region, the optical function layer 13 has a transmittance of 30% or more at the first wavelength, and the optical function layer has a wavelength range of 700 to 800 nm in the near infrared region. In addition, a material having a transmittance difference of any wavelength of 10% or more in a wavelength range of 800 to 1500% in the near infrared region may be used. That is, the optical functional layer 13 has a transmission spectrum in the near-infrared region exhibiting high transmittance at the first wavelength, and has a wavelength range of 700 to 800 nm in the near-infrared region and 800 to 1500 nm in the near-infrared region. The transmittance difference of any wavelength in the wavelength range is 10% or less. Here, as an example, it is assumed that the optical functional layer 13 has such optical characteristics. Here, the second wavelength is also in the near infrared region, and the transmittance of the optical function layer 13 at the second wavelength is lower than the transmittance of the optical function layer 13 at the first wavelength. The difference in transmittance of the optical function layer 13 at the first wavelength is 10% or more.

  The optical functional layer 13 having the optical characteristics described above, that is, optical characteristics of selectively transmitting light in a part of the wavelength region out of light in the near infrared region and absorbing the remaining light, For example, a predetermined near infrared absorber and a resin are included. As this near-infrared absorber, for example, at least one selected from the group consisting of phthalocyanine compounds, naphthalocyanine compounds, anthraquinone compounds, diimonium compounds, and cyanine compounds can be used. Moreover, as resin, what is generally used in process ink can be used, for example.

  The optical function layer 13 is formed by, for example, a printing method. Examples of the printing method include an offset printing method, a gravure printing method, a screen printing method, and a flexographic printing method. The thickness of the optical function layer 13 is, for example, in the range of 0.5 to 10 μm, and typically in the range of 1 to 5 μm.

  The light absorption pattern 14 is provided on the optical function layer 13. The light absorption pattern 14 faces a part of the scratch layer 18 with the optical function layer 13 interposed therebetween. In the example shown in FIGS. 1 and 2, the light absorption pattern 14 forms a one-dimensional code. The light absorption pattern 14 may constitute a two-dimensional code. Or the light absorption pattern 14 may comprise other patterns, such as a character, a symbol, a pattern, and a figure.

  The light absorption pattern 14 absorbs light of the first wavelength. Specifically, the absorption rate at the first wavelength of the light absorption pattern 14 is larger than the absorption rate at the first wavelength of the scratch layer 18 and the absorption rate at the first wavelength of the optical function layer 13. The absorptance of the light absorption pattern 14 with respect to the first wavelength light is, for example, 70% or more, and typically 80% or more.

  When the first wavelength is in the near infrared region, the light absorption pattern 14 contains, for example, a near infrared absorber and a resin. As this resin, what is generally used in process ink can be used, for example.

  The near-infrared absorber used here typically has a different absorption spectrum in the near-infrared region from the near-infrared absorber used in the optical functional layer 13. For example, the near-infrared absorber used here has a higher absorptance with respect to light of the first wavelength than the near-infrared absorber used in the optical function layer 13. As this near-infrared absorbing agent, for example, carbon black used in process black ink can be used. Or you may use the compound illustrated as a near-infrared absorber of the optical function layer 13 as this near-infrared absorber.

  It is preferable that the light absorption pattern 14 has the same color as the optical functional layer 13 or a light color as long as it exhibits a sufficient absorption rate with respect to light of the first wavelength. This makes it difficult to understand the presence of the light absorption pattern 14 when the label 1 is observed with the naked eye.

  The light absorption pattern 14 is desirably distributed over almost the entire region corresponding to the scratch layer 18. This can make it difficult to analyze the spectral characteristics of the optical functional layer 13.

  The light absorption pattern 14 is formed by, for example, a printing method. Examples of the printing method include an offset printing method, a gravure printing method, a screen printing method, and a flexographic printing method. Alternatively, the light absorption pattern 14 may be formed using a thermal transfer ribbon, ink jet printing, or laser printing. The thickness of the light absorption pattern 14 is, for example, in the range of 0.5 to 5 μm, and typically in the range of 0.5 to 2 μm.

Next, the authenticity determination method using this label 1 will be described.
First, an image display system that can be used for authenticity determination when this label 1 is used as a forgery prevention label will be described.

FIG. 3 is a diagram schematically illustrating an example of an image display system that can be used for authenticity determination.
The system shown in FIG. 3 includes two light sources 31, an imaging device 32, an image display device 36, and an optical filter 38.

  The light source 31 is, for example, an infrared LED (light-emitting diode). The light source 31 is installed obliquely above the label 1 placed so that the front surface faces upward on a placement table (not shown). One of the light sources 31 may be omitted. Three or more light sources 31 may be provided. When providing the several light source 31, the spectrum of the light which these light sources 31 radiate | emit may be the same, and may differ. In the latter case, for example, a configuration in which a light source 31 that emits light of a first wavelength and a light source 31 that emits light of a second wavelength are arranged and can be alternately turned on may be employed.

  The imaging device 32 is, for example, a CCD (charge-coupled device) camera. The imaging device 32 is installed so as to face the front surface of the label 1.

  The image display device 36 is connected to the imaging device 32. The image display device 36 displays an image taken by the imaging device 32.

  The optical filter 38 transmits light of the first and second wavelengths and absorbs at least a part of other wavelengths. For example, the optical filter 38 is a visible light cut filter that absorbs visible light and transmits at least part of infrared light. The optical filter 38 is installed between the label 1 and the imaging device 32.

  FIG. 4 is a diagram schematically showing an example of an image formed by visualizing the information recorded on the labels shown in FIGS. 1 and 2 by the image display system shown in FIG.

  When the front surface of the label 1 immediately after manufacture is observed with the naked eye, for example, the whole looks black. On the other hand, when the label 1 immediately after manufacture is photographed with the imaging device 32 while illuminating with the light of the first wavelength emitted from the light source 31, using the system shown in FIG. The image corresponding to 14 is black and the area corresponding to the other part of the label 1 is displayed as white image I1. That is, in this case, the latent image can be visualized, for example, a visible image having a PCS (print contrast signal) value of 0.75 or more can be displayed.

  When the light source 31 that emits light of the first wavelength is turned off and the light source 31 that emits light of the second wavelength is turned on, the image display device 36 displays, for example, a black image as a whole, or an image I1 is displayed at a lower contrast ratio, for example, with a PCS value of less than 0.75.

Next, the invalidation process for label 1 will be described.
FIG. 5 is a diagram schematically illustrating an example of the label invalidation processing method illustrated in FIGS. 1 and 2. FIG. 6 is a plan view schematically showing an example of a label invalidated by the method shown in FIG. In FIG. 5, reference symbol L represents a laminate of the release layer 18 b, the optical function layer 13, and the light absorption pattern 14. Moreover, in FIG. 5, the base material protective layer 18a is omitted.

  In the invalidation processing method shown in FIG. 5, the front surface of the label 1 is scratched in the right direction on the paper surface by the hook-shaped tool 61. If it carries out like this, the part located ahead rather than the scratch layer 18 will peel from the base material 11 with a part of scratch layer 18, tearing along the left-right direction of a paper surface. Here, the laminate L of the release layer 18b, the optical function layer 13, and the light absorption pattern 14 is peeled from the substrate 11 together with a part of the release layer 18b while tearing along the left-right direction of the paper surface. As a result, the structure shown in FIG. 6 is obtained.

  The label 1 shown in FIG. 6 and the label 1 shown in FIG. 1 are typically easily distinguishable from each other by observation with the naked eye. The labels 1 can also be distinguished from each other using machine reading.

  FIG. 7 is a diagram schematically showing an example of an image formed by visualizing information recorded on a label invalidated by the method shown in FIG. 5 by the image display system shown in FIG.

  In the portion of the label 1 where the laminate L is peeled off, the base material protective layer 18a is exposed. Therefore, the reflectance at the first wavelength of this portion is typically different from the reflectance at the first wavelength of the other portions. Therefore, when the label 1 after the invalidation process is photographed by the imaging device 32 while illuminating with the light of the first wavelength emitted from the light source 31 using the system shown in FIG. The first region corresponding to 14 is black, the second region corresponding to the portion of the optical function layer 13 not facing the light absorption pattern 14 is white, and the second region corresponding to the portion where the base material protective layer 18a is exposed. For example, an image I2 in which the three regions are gray is displayed. That is, in this case, the image display device 36 displays an image I2 that is different from the image I1 of FIG.

  In the image I2, the first region and the third region may have different brightness or the same. For example, if the peeling layer 18b has a sufficiently high reflectance at the first wavelength, the base material protective layer 18a is transparent to the first wavelength light, and the base material 11 has a sufficiently high absorption rate at the first wavelength. In the image I2, the brightness of the first and third regions is substantially equal.

  In the image I2, the second region and the third region may have different brightness or the same. For example, if the peeling layer 18b has a sufficiently high reflectance at the first wavelength, the base material protective layer 18a is transparent to the first wavelength light, and the base material 11 has a sufficiently high reflectance at the first wavelength. In the image I2, the brightness of the second and third regions is substantially equal.

The label 1 described above can be variously modified.
FIG. 8 is a cross-sectional view schematically showing a modification of the label shown in FIGS.
The label 1 shown in FIG. 8 is the same as the label 1 described with reference to FIGS. 1 and 2 except that the light absorption pattern 14 is interposed between the scratch layer 18 and the optical function layer 13. .

  In the label 1 shown in FIGS. 1 and 2, the light absorption pattern 14 is provided on the optical functional layer 13. Therefore, for example, the presence of the light absorption pattern 14 may be realized due to a difference in color and gloss of the optical functional layer 13 and the light absorption pattern 14.

  On the other hand, in the label 1 of FIG. 8, the light absorption pattern 14 is interposed between the optical function layer 13 and the scratch layer 18. Therefore, the light absorption pattern 14 can be concealed by reducing the visible light transmittance of the optical functional layer 13. As a result, it is difficult for a person performing fraud to recognize that the authenticity determination is performed using the label 1.

  Next, the adhesive label and printed matter including the label 1 described above will be described.

FIG. 9 is a cross-sectional view schematically showing an example of an adhesive label.
The pressure-sensitive adhesive label 10 shown in FIG. 9 includes the label 1 described with reference to FIGS. 1 and 2 and the pressure-sensitive adhesive layer 2. The adhesive layer 2 is provided on the back surface of the label 1.

  For example, the adhesive label 10 is affixed to an article that can be confirmed to be genuine. The pressure-sensitive adhesive label 10 may further include release paper that covers the surface of the pressure-sensitive adhesive layer 2 so as to be peelable.

FIG. 10 is a cross-sectional view schematically illustrating an example of a printed material.
A printed matter 100 shown in FIG. 10 includes the label 1, the adhesive layer 2, and the printed matter main body 3 described with reference to FIGS. The label 1 is affixed to the printed material main body 3 via the adhesive layer 2.

  The printed material body 3 includes a printing substrate 3a and a printing layer 3b.

  The printing substrate 3a is made of, for example, paper, plastic, wood, glass, or resin. The printing substrate 3a may have a single layer structure or a multilayer structure. The printing substrate 3a may have a layer shape or may have another shape.

  The printing layer 3b is provided on the printing substrate 3a. The printing layer 3b may cover the entire printing substrate 3a, or may cover only a part thereof.

  The printed material 100 is subjected to the invalidation process after the use period ends. In this way, it is possible to determine whether or not the label 1 has been reused by using, for example, the image display system described with reference to FIG. 3 for a printed matter whose authenticity is unknown. it can. That is, it is possible to determine the authenticity of a printed matter whose authenticity is unknown. Accordingly, it is possible to check a person who performs an illegal act, and therefore, it is possible to prevent the label attached to the article from being reused after the use period of the article is ended. As a result, forgery of the printed material 100 can be suppressed.

  Examples of the present invention will be described below.

<Example 1>
The label 1 described with reference to FIGS. 1 and 2 was manufactured by the following method.

  First, a white tack-coated paper was prepared as the substrate 11. Next, in one of the base materials 11, the ink D having the following composition as a transparent varnish is applied to a rectangular region having a size of 60 mm × 30 mm by screen printing so that the dry film thickness becomes 3 μm. Applied. The base material protective layer 18a was obtained by drying this coating film.

  Next, a mixture of silver powder and resin was applied as a silver ink on the base material protective layer 18a by screen printing so that the dry film thickness was 10 μm. The release layer 18b was obtained by drying this coating film.

  Next, an ink B having the following composition was printed on the entire surface of the substrate 11 on which the substrate protective layer 18a and the release layer 18b were formed by an offset printing method so that the dry film thickness was 1 μm. Furthermore, the optical function layer 13 was obtained by irradiating the coating film with ultraviolet rays.

Thereafter, a process black ink was printed on the optical functional layer 13 so that the dry film thickness was 1 μm to form a light absorption pattern 14 as a two-dimensional code pattern. As the process black ink, FD Carton ACE Sumiro manufactured by Toyo Ink Manufacturing Co., Ltd. was used.
Thus, label 1 was completed.

[Composition of ink B]
Organic blue pigment (manufactured by Gokoku Color Co., Ltd.) 5 parts by weight Organic red pigment (made by Gokoku Color Co., Ltd.) 7 parts by weight Organic yellow pigment (manufactured by Gokoku Color Co., Ltd.) 8 parts by weight UV curable offset ink medium (FD Carton ACE Medium) B: manufactured by Toyo Ink Mfg. Co., Ltd.
Acrylic polyol (copolymer of methyl temacrylate and 2-hydroxyethyl methacrylate) 25 parts by weight Nitrocellulose 5 parts by weight Xylene diisocyanate 5 parts by weight Toluene 35 parts by weight Methyl ethyl ketone 30 parts by weight The front surface of this label 1 was observed with the naked eye However, the whole looked black.

  Further, using the system shown in FIG. 3, the label 1 is photographed by the imaging device 32 while illuminating with the first wavelength light emitted from the light source 31, here, the light having a wavelength of 800 nm. Displayed an image consisting of a black two-dimensional code pattern and a white background. That is, the label displayed a machine-readable image.

  Next, invalidation processing was performed on this label 1. Specifically, the front surface of the label 1 was rubbed with coins. When the front surface of the label 1 was observed with the naked eye, the portion rubbed with coins looked white and the other portions looked black.

  Next, using the system shown in FIG. 3, the label 1 was photographed with the imaging device 32 while illuminating with the light of the first wavelength emitted from the light source 31. The image displayed by the image display device 36 was a coin. The color of the area corresponding to the rubbed portion was different from the image displayed by the image display device 36 for the label 1 before invalidation processing. That is, it becomes impossible to accurately read the two-dimensional code pattern.

<Example 2>
The label 1 described with reference to FIGS. 1 and 2 was manufactured by the following method.

  First, a white coated paper was prepared as the substrate 11. Next, the ink D was applied as a transparent varnish to one of the substrates 11 in a rectangular region having a size of 60 mm × 30 mm by a screen printing method so that the dry film thickness was 3 μm. The base material protective layer 18a was obtained by drying this coating film.

  Next, a mixture of silver powder and resin was applied as a silver ink on the base material protective layer 18a by screen printing so that the dry film thickness was 10 μm. The release layer 18b was obtained by drying this coating film.

  Next, ink C having the following composition was printed on the entire surface of the substrate 11 on which the substrate protective layer 18a and the release layer 18b were formed by an offset printing method so that the dry film thickness was 1 μm. Furthermore, the optical function layer 13 was obtained by irradiating the coating film with ultraviolet rays.

Thereafter, a process black ink was printed on the optical functional layer 13 so that the dry film thickness was 1 μm to form a light absorption pattern 14 as a two-dimensional code pattern. As the process black ink, FD Carton ACE Sumiro manufactured by Toyo Ink Manufacturing Co., Ltd. was used.
Thus, label 1 was completed.

[Composition of ink C]
Organic blue pigment (manufactured by Gokoku Color Co., Ltd.) 5 parts by weight Organic red pigment (made by Gokoku Color Co., Ltd.) 7 parts by weight Organic yellow pigment (made by Gokoku Color Co., Ltd.) 8 parts by weight Infrared absorber (YKR-3081: Yamamoto Kasei Co., Ltd.) 5 parts by mass Medium for UV curable offset ink (FD Carton ACE Medium Lo: manufactured by Toyo Ink Manufacturing Co., Ltd.) 75 parts by mass When the front surface of this label 1 was observed with the naked eye, the whole looked black.

  Further, using the system shown in FIG. 3, the label 1 is photographed by the imaging device 32 while illuminating with the first wavelength light emitted from the light source 31, here, the light having a wavelength of 800 nm. Displayed an image consisting of a black two-dimensional code pattern and a white background. That is, the label displayed a machine-readable image.

  However, when the system shown in FIG. 3 was used to photograph the label 1 with the imaging device 32 while illuminating with the light of the second wavelength emitted from the light source 31, here, the light with a wavelength of 940 nm, the image display device 36. Displayed an image consisting of a black two-dimensional code pattern and a gray background. That is, the contrast ratio is lower than when illuminated with light having a wavelength of 800 nm, and machine reading of the two-dimensional code pattern becomes impossible.

  Next, invalidation processing was performed on this label 1. Specifically, the front surface of the label 1 was rubbed with coins. When the front surface of the label 1 was observed with the naked eye, the portion rubbed with coins looked white and the other portions looked black.

  Next, using the system shown in FIG. 3, the label 1 was photographed by the imaging device 32 while illuminating with the first wavelength light emitted from the light source 31, here, the light having a wavelength of 800 nm. Is different from the image displayed by the image display device 36 on the label 1 before the invalidation process in the color corresponding to the portion rubbed with coins. That is, it becomes impossible to accurately read the two-dimensional code pattern.

  DESCRIPTION OF SYMBOLS 1 ... Label, 2 ... Adhesive layer, 3 ... Printed material main body, 3a ... Printing base material, 3b ... Printing layer, 10 ... Adhesive label, 11 ... Base material, 13 ... Optical function layer, 14 ... Light absorption pattern, 18 ... Scratch Layer, 18a ... base material protective layer, 18b ... release layer, 31 ... light source, 32 ... imaging device, 36 ... image display device, 38 ... optical filter, 61 ... hook-shaped tool, 100 ... printed matter, L ... laminate.

Claims (7)

A substrate having a front surface and a back surface;
An optical functional layer facing the front surface and transmitting light of a certain wavelength;
A scratch layer interposed between the base material and the optical functional layer and transmitting or reflecting the light of the wavelength;
It is interposed between the optical functional layer and the scratch layer, or facing the scratch layer with the optical functional layer in between, and a light absorption pattern that absorbs light of the wavelength, When the front surface is scratched in a certain direction, a portion located in front of the scratch layer is torn along the direction and peeled off from the base material with a part of the scratch layer. Labeled.   The label according to claim 1, wherein the light absorption pattern has the same color as the optical functional layer.   The label according to claim 1, wherein the wavelength is in an infrared region, and the optical functional layer is a black layer. The wavelength is in the near infrared region, the transmittance of the optical functional layer at the wavelength is 30% or more, and the optical functional layer has a wavelength region of 700 to 800 nm in the near infrared region, and a near infrared region. The label according to claim 3, wherein a transmittance difference of any wavelength is 10% or more in a wavelength region of 800 to 1500 nm .   The label according to any one of claims 1 to 4, wherein the scratch layer includes a resin and a filler dispersed therein, and is configured to reflect or scatter light having the wavelength.   An adhesive label comprising the label according to claim 1 and an adhesive layer facing the back surface of the label. A label according to any one of claims 1 to 5,
A printing substrate facing the back of the label;
A printed matter comprising an adhesive layer interposed between the label and the printing substrate and having the label attached to the printing substrate.

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