JP5948735B2 - Display body and article with display body - Google Patents

Description

  The present invention relates to a display body and an article with a display body using an optical technique that provides an anti-counterfeit effect, a decoration effect, and / or an aesthetic effect.

  It is important that items such as securities, certificates, and personal authentication media are difficult to counterfeit. Articles such as branded products are required to have excellent aesthetic effects in order to produce a high-class feeling. Therefore, such an article may support a display body excellent in forgery prevention effect and / or aesthetic effect.

  As such a display body, for example, Patent Document 1 discloses that a first interface portion provided with a relief type diffraction grating composed of a plurality of grooves and a center smaller than the minimum center distance between the plurality of grooves. There is described a display body characterized in that the display body includes a second interface portion that is two-dimensionally arranged at a distance and provided with a plurality of concave portions or convex portions. This display body includes a high-definition structure and has special optical characteristics. Therefore, this display has a high anti-counterfeit effect.

JP 2008-107470 A

  An object of the present invention is to realize a higher anti-counterfeit effect.

According to the first aspect of the present invention, a plurality of two-dimensional periodic structures arranged with a minimum center-to-center distance within a range of 200 nm to 500 nm and with an aspect ratio within a range of 0.5 to 1.5. A first interface portion provided with a recess or projection, the surface of which is coated with a reflective material layer, a second interface portion of which a flat surface is coated with a reflective material layer, and a minimum within a range of 200 nm to 500 nm. Provided with a plurality of recesses or projections arranged in a two-dimensional periodic structure having a spatial frequency different from that of the first interface portion within a range of an inter-center distance and an aspect ratio of 0.5 to 1.5. A third interface portion whose surface is coated with a reflective material layer, and the second interface portion is disposed in contact with both the first interface portion and the third interface portion. A first optical effect layer; and the reflective material with the first optical effect layer interposed therebetween Or a second optical effect layer including at least one of a cholesteric liquid crystal, a pearl pigment, and a multilayer interference film, and a portion facing the first optical effect layer with the reflective material layer interposed therebetween, The first optical effect layer is made of a photocurable resin, and the addition amount of the photopolymerization initiator added to the photocurable resin is 0.5 to 5% by mass with respect to the photocurable resin. range der of is, the second interface unit is a linear region, the display body linewidth is characterized in that it is 0.01mm or more 0.1mm or less is provided.

  According to the second aspect of the present invention, there is provided an article with a display body comprising a base material and a display body according to the first side surface supported by the base material.

  According to the present invention, it is possible to achieve a higher anti-counterfeit effect.

The top view which shows schematically the display body which concerns on 1 aspect of this invention. Sectional drawing along the I-II line of the display body shown in FIG. The perspective view which shows an example of the structure employable as the 1st interface part and 3rd interface part of the display body shown in FIG.1 and FIG.2. The figure which shows schematically the optical effect which the part corresponding to the 1st interface part and the 3rd interface part among the display bodies shown in FIG.1 and FIG.2 shows. The top view which shows schematically the display body which concerns on another aspect of this invention. The top view which shows roughly the example of the arrangement pattern of the recessed part or convex part which can be employ | adopted as a 1st interface part and a 3rd interface part. The top view which shows roughly the example of the arrangement pattern of the recessed part or convex part which can be employ | adopted as a 1st interface part and a 3rd interface part. The perspective view which expands and shows the other example of the structure employable as the 1st interface part of the display body shown in FIG.1 and FIG.2, and a 3rd interface part. The perspective view which expands and shows the other example of the structure employable as the 1st interface part of the display body shown in FIG.1 and FIG.2, and a 3rd interface part. The perspective view which expands and shows the other example of the structure employable as the 1st interface part of the display body shown in FIG.1 and FIG.2, and a 3rd interface part. Sectional drawing which shows schematically the adhesive label which concerns on 1 aspect of this invention. Sectional drawing which shows schematically the transfer foil which concerns on 1 aspect of this invention. Sectional drawing which shows an example of an article | item with a display body roughly. Sectional drawing which shows the other example of the articles | goods with a display body roughly.

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

  FIG. 1 is a plan view schematically showing a display body according to one aspect of the present invention. 2 is a cross-sectional view of the display body shown in FIG. 1 taken along line I-II. 1 and 2, directions parallel to the main surface of the display body 10 and orthogonal to each other are defined as an X direction and a Y direction, and a direction perpendicular to the main surface of the display body 10 is defined as a Z direction.

  As shown in FIG. 1, the display body 10 includes display portions DP1, DP2, and DP3 having different optical characteristics. And as shown in FIG. 2, the base material 11, the 1st optical effect layer 12, the reflective material layer 13, the light transmission layer 15, and the 2nd optical effect layer 17 are included. The interface between the first optical effect layer 12 and the reflective material layer 13 includes a first interface part IF1, a second interface part IF2, and a third interface part IF3. As will be described later, the first interface portion IF1 and the third interface portion IF3 are provided with a plurality of concave portions or convex portions.

  Below, the area | region of 1st interface part IF1 corresponding to display part DP1 among the parts coat | covered with the reflective material layer 13 is called 1st area | region. In addition, a region of the second interface portion IF2 corresponding to the display unit DP2 is referred to as a second region. A region of the third interface portion IF3 corresponding to the display unit DP3 is referred to as a third region.

  The base material 11 is typically a sheet or film made of a resin. As this resin, for example, polyethylene terephthalate, polyethylene naphthalate, polycarbonate, triacetyl cellulose, polypropylene, polymethyl methacrylate, acrylic styrene copolymer, or vinyl chloride is used. The substrate 11 may be omitted.

  The first optical effect layer 12 is formed on the substrate 11. The first optical effect layer 12 typically has optical transparency. As a material of the first optical effect layer 12, for example, a thermoplastic resin, a thermosetting resin, and a resin such as an ultraviolet ray or an electron beam curable resin (hereinafter also referred to as a photocurable resin) are used. When a thermoplastic resin, a thermosetting resin, or a photocurable resin is used as the material of the first optical effect layer 12, a concave structure and / or a convex structure is easily formed on one main surface by transfer using an original plate. can do.

  Examples of the thermoplastic resin having optical transparency include polyethylene terephthalate, polyethylene naphthalate, polycarbonate, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate, nitrocellulose, polyethylene, polypropylene, acrylic styrene copolymer, vinyl chloride, and the like. Polymethyl methacrylate is mentioned.

  Examples of the light curable thermosetting resin include polyimide, polyamide, polyester urethane, acrylic urethane, epoxy urethane, silicone, epoxy, and melamine resin.

  The photocurable resin refers to a resin that is cured by irradiation with light such as ultraviolet rays and electron beams. Typical resins that undergo radical polymerization by light irradiation include acrylic resins having an acryloyl group in the molecule. For example, epoxy acrylate, urethane acrylate, polyester acrylate or polyol acrylate oligomers or polymers, simple resins, and the like. Functional, bifunctional or polyfunctional polymerizable (meth) acrylic monomers (for example, tetrahydrofurfuryl acrylate, 2-hydroxyethyl acrylate, 2-hydroxy-3-phenoxypropyl acrylate, polyethylene glycol diacrylate, polypropylene glycol diacrylate, tri Methylolpropane triacrylate, pentaerythritol triacrylate or pentaerythritol tetraacrylate) or its oligomers Polymer, or a mixture thereof is used.

  When using a photocurable resin as a material for the first optical effect layer 12, this layer may further contain a photopolymerization initiator. Examples of this photopolymerization initiator include benzophenone, diethylthioxanthone, benzyldimethyl ketal, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1- [ 4- (methylthio) phenyl] -2-morpholinopropane-1 and acylphosphine oxide. However, the photopolymerization initiator does not react 100%, and unreacted ones may adversely affect the performance. Therefore, the addition amount of the photopolymerization initiator is, for example, 0.1 to 7% by mass, typically 0.5 to 5% by mass with respect to the photocurable resin, and no uncured part remains. It is preferable to keep it to the extent.

  On one main surface of the first optical effect layer 12, interface portions IF1 to IF3 are provided. The structure and optical characteristics of these interface portions IF1 to IF3 will be described in detail later.

  As the reflective material layer 13 covering the interface portions IF1 to IF3, for example, a metal or alloy layer made of a metal material such as aluminum, silver, tin, chromium, nickel, copper, gold, and alloys thereof may be used. it can. In this case, the reflective material layer 13 is typically formed using a vacuum film forming method. Examples of the vacuum film forming method include a vacuum deposition method and a sputtering method. The thickness of the reflective material layer 13 is, for example, in the range of 1 nm to 100 nm.

  The reflective material layer 13 plays a role of causing the display 10 to display an image with better visibility. Further, by providing the reflective material layer 13, it is possible to make it difficult to cause damage to the concave structure and / or the convex structure provided on one main surface of the first optical effect layer 12.

  The light transmission layer 15 is interposed between the reflective material layer 13 and the second optical effect layer 17. The light transmission layer 15 plays a role of improving the adhesion between these layers.

  The light transmission layer 15 has a light transmission property, and is typically transparent. Examples of the material of the light transmission layer 15 include vinyl acetate resin, ethylene vinyl acetate copolymer resin, polyester resin, polyester urethane resin, acrylic urethane resin, epoxy resin, epoxy urethane resin, polycarbonate urethane resin, butyral resin, and chlorinated propylene. Resin. The light transmission layer 15 may be omitted.

  The second optical effect layer 17 includes a portion facing the first optical effect layer 12 with the reflective material layer 13 interposed therebetween. 1 and 2 illustrate, as an example, a case where the second optical effect layer 17 faces the entire first optical effect layer 12 with the reflective material layer 13 interposed therebetween.

  The second optical effect layer 17 includes at least one of a cholesteric liquid crystal, a pearl pigment, and a multilayer interference film. The second optical effect layer 17 typically includes cholesteric liquid crystal.

  When the second optical effect layer 17 includes a cholesteric liquid crystal, the second optical effect layer 17 has, for example, a material containing a compound having a cholesteric structure, or a nematic liquid crystal having a cholesteric structure by adding a chiral agent. It can be manufactured using a material containing the above. The cholesteric liquid crystal can change the helical pitch and the twist direction of the polarization plane by changing the amount and type of the chiral agent added to the nematic liquid crystal, for example. In addition, a polymerizable group such as an acrylic group can be introduced at both ends of the liquid crystal molecule. This makes it easy to fix the alignment after aligning the liquid crystal molecules.

  When the second optical effect layer 17 includes a cholesteric liquid crystal, the second optical effect layer 17 may be a layer made of cholesteric liquid crystal or a layer containing a cholesteric liquid crystal pigment.

  When the second optical effect layer 17 is a layer made of cholesteric liquid crystal, the light scattering in the second optical effect layer 17 can be minimized.

  When the second optical effect layer 17 is a layer containing a cholesteric liquid crystal pigment, the second optical effect layer 17 typically contains a cholesteric liquid crystal powder and a transparent binder. In this case, for example, the optical characteristics of the second optical effect layer 17 can be finely adjusted by using a plurality of cholesteric liquid crystal pigments having different helical pitches and twisted directions of the polarization planes.

  When the second optical effect layer 17 includes cholesteric liquid crystal, when the second optical effect layer 17 is illuminated, the second optical effect layer 17 can emit circularly polarized selective reflection light. In the following, it is assumed that the alignment axis of the cholesteric liquid crystal is substantially parallel to the main surface of the display body 10.

It is known that if the helical pitch of the cholesteric liquid crystal is P, the incident angle with respect to the axis parallel to the main surface of the display body 10 is θ, and the wavelength of the reflected light is λ, the following equation holds: Yes.
2P · sin θ = nλ (n = 1, 2, 3,...).

  According to this equation, for example, when white light is incident on the second optical effect layer 17 perpendicularly, that is, when θ = 90 °, regular reflection light having a wavelength twice the helical pitch P is reflected by the second optical effect layer 17. Injected perpendicular to the effect layer 17.

  For example, when a cholesteric liquid crystal having a helical pitch P of 280 nm is used, the second optical effect layer 17 can emit light (wavelength λ = 560 nm) corresponding to a green hue. Alternatively, when a cholesteric liquid crystal having a helical pitch P of 360 nm is used, the second optical effect layer 17 can emit light (wavelength λ = 720 nm) corresponding to a red hue. Thus, by changing the helical pitch P of the cholesteric liquid crystal, the optical characteristics of the second optical effect layer 17 including the cholesteric liquid crystal can be changed.

  When the incident angle θ of the illumination light is gradually reduced, the wavelength of light emitted from the second optical effect layer 17 is gradually shortened, and finally becomes shorter than the shortest wavelength of visible light. That is, in this case, the hue of the emitted light changes from red to green and from green to blue, and finally the emitted light becomes invisible. For example, when a cholesteric liquid crystal having a helical pitch P of 360 nm is used and the incident angle θ is 30 ° (60 ° with respect to the normal direction of the main surface of the display body 10), the wavelength of the selectively reflected light is 360 nm. Therefore, in this case, the observer cannot visually recognize the visual effect due to the second optical effect layer 17 or is extremely difficult to visually recognize.

The second optical effect layer 17 containing cholesteric liquid crystal is formed as follows, for example.
In the first method, first, stretched films such as polyethylene terephthalate, polypropylene, nylon, cellophane, and polyvinyl alcohol are prepared. This stretched film may be rubbed. Next, a coating liquid in which a cholesteric liquid crystal raw material is dissolved in an organic solvent is prepared. Next, this coating solution is applied onto the stretched film. Then, the obtained coating film is dried. Thereby, liquid crystal molecules are aligned on the stretched film. In this state, ultraviolet rays are irradiated to fix the alignment of the liquid crystal molecules. In this way, a cholesteric liquid crystal forming film is obtained.

  Next, an adhesive having a light transmitting property is applied to one main surface of the transfer target, for example, the first optical effect layer 12 or the reflective material layer 13. And a cholesteric liquid crystal formation film is bonded together on it. Next, only the stretched film is peeled off. In this way, the second optical effect layer 17 containing cholesteric liquid crystal is formed on one main surface of the transfer target, for example, the first optical effect layer 12 or the reflective material layer 13.

  In the second method, first, a photo-alignment ink is applied to a main surface on which the second optical effect layer 17 is to be formed, for example, one main surface of the first optical effect layer 12 or the reflective material layer 13. Thereafter, the coating film is dried and irradiated with polarizing ultraviolet light to form an alignment film. Next, a coating liquid in which a cholesteric liquid crystal raw material is dissolved in an organic solvent is prepared, and this coating liquid is applied onto the alignment film. Thereafter, the obtained coating film is dried to align liquid crystal molecules. In this state, ultraviolet rays are irradiated to fix the alignment of the liquid crystal molecules. In this way, the second optical effect layer 17 containing cholesteric liquid crystal is obtained. In this case, an anchor layer may be further provided when the adhesion between the main surface on which the second optical effect layer 17 is to be formed and the alignment film made of the photo-alignment ink is insufficient.

  Although the method for aligning liquid crystal molecules using the alignment film has been described above, the method for aligning liquid crystal molecules is not limited to this. For example, the liquid crystal molecules may be aligned by applying an electric and / or magnetic field or applying a shear stress.

  In the above description, the method for fixing the alignment of liquid crystal molecules by ultraviolet irradiation has been described. However, the method for fixing the alignment of liquid crystal molecules is not limited thereto. For example, the alignment of liquid crystal molecules may be fixed by quenching a layer containing liquid crystal molecules. Among these methods, a method of fixing the alignment of liquid crystal molecules by irradiation with ultraviolet rays is more preferable.

  From the viewpoint of the manufacturing cost of the display body 10, the first method is typically adopted among the first and second methods.

  When the second optical effect layer 17 contains a pearl pigment, the second optical effect layer 17 is made of, for example, a powder of a layered material such as mica, or a layered material such as reduced titanium dioxide and iron oxide. It contains powder that is coated. Alternatively, in this case, the second optical effect layer 17 may be a powder obtained by pulverizing a multilayer interference film described later. When the second optical effect layer 17 contains a pearl pigment, the second optical effect layer 17 typically further contains a transparent binder.

  When the second optical effect layer 17 contains a pearl pigment, the second optical effect layer 17 is typically formed by a printing method or a coating method. As these printing methods or coating methods, known methods can be employed.

  The multilayer interference film that can be included in the second optical effect layer 17 is formed by laminating a plurality of layers having different refractive indexes. Each layer constituting the multilayer interference film is, for example, a metal thin film, a ceramic thin film, or an organic polymer thin film. The multilayer interference film includes, for example, an alternating laminate of layers having different refractive indexes. For example, a ceramic thin film or a metal thin film having a light transmittance in the range of 20 to 70% and an organic polymer thin film are alternately laminated with a predetermined thickness to absorb or reflect only visible light having a specific wavelength. A multilayer interference film is obtained.

  Examples of materials that can be used for each layer constituting the multilayer interference film are given below. In the following, the numerical values in parentheses described after the chemical formula or the compound name represent the respective refractive indexes.

Ceramics: Sb ₂ O ₃ (3.0), Fe ₂ O ₃ (2.7), TiO ₂ (2.6), CdS (2.6), CeO ₂ (2.3), ZnS (2.3 ), PbCl ₂ (2.3), CdO (2.2), Sb ₂ O ₃ (2.0), WO ₃ (2.0), SiO (2.0), Si ₂ O ₃ (2.5), In ₂ O ₃ (2.0), PbO (2.6), Ta ₂ O ₃ (2.4), ZnO (2.1), ZrO ₂ (2.0), MgO (1.6), Si ₂ O ₂ (1.5), MgF ₂ (1.4), CeF ₃ (1.6), CaF ₂ (1.3 to 1.4), AlF ₃ (1.6), Al ₂ O ₃ (1. 6) and GaO (1.7).

  Metal: Al, Fe, Mg, Zn, Au, Ag, Cr, Ni, Cu, Si, and alloys thereof.

  Organic polymers: polyethylene (1.51), polypropylene (1.49), polytetrafluoroethylene (1.35), polymethyl methacrylate (1.49) and polystyrene (1.60).

  When the second optical effect layer 17 includes a multilayer interference film, the second optical effect layer 17 is formed by using a known method capable of controlling the film thickness, the film formation speed, the number of layers, the optical film thickness, and the like. To do. Examples of such a method include a vacuum deposition method, a sputtering method, and a chemical vapor deposition method (CVD method). The optical film thickness is a product of the refractive index and the film thickness.

  Alternatively, the multilayer interference film may be a multilayer film formed by multilayer simultaneous extrusion. This multilayer film is an alternating laminate of a plurality of plastic thin films having different refractive indexes. Each of these plastic thin films contains a plastic material. Each of these plastic thin films may contain an auxiliary agent as required.

  This multilayer film includes, for example, an alternating laminate of a plastic thin film made of a high refractive index material and a plastic thin film made of a low refractive index material. Examples of the high refractive index material include polyethylene naphthalate (1.63), polycarbonate (1.59), polystyrene (1.59), and polyethylene terephthalate (1.58). Examples of the low refractive index material include nylon (1.53), polymethyl methacrylate (1.49), polymethylpentene (1.46), and fluorine-based polymethyl methacrylate (1.4).

  The color of the second optical effect layer 17 changes according to the change in the observation angle. The optical characteristics resulting from the combination of the second optical effect layer 17, the first optical effect layer 12, and the reflective material layer 13 will be described in detail later.

  FIG. 3 is an enlarged perspective view showing an example of a structure that can be employed in the first interface part IF1 and the third interface part IF3 of the display body shown in FIGS.

  The first interface portion IF1 and the third interface portion IF3 are provided with a plurality of concave portions or convex portions 14b. These concave portions or convex portions 14b are arranged as a two-dimensional periodic structure with a minimum center-to-center distance within a range of 200 nm to 500 nm. The recesses or protrusions 14b are typically arranged regularly. The first interface portion and the third interface portion are arranged such that the average minimum center distance between the concave portions or the convex portions 14b, that is, the spatial frequency is different. Each of the recesses or projections 14b typically has a forward taper shape. The depth or height of the recess or protrusion 14b is usually larger than the depth of the groove 14a, and is typically in the range of 0.3 μm to 0.5 μm. The ratio of the depth or height (hereinafter also referred to as aspect ratio) to the minimum center-to-center distance of the concave portion or convex portion 14b is in the range of 0.5 to 1.5, for example.

  The third interface part IF2 is a flat surface.

  Hereinafter, the optical effect resulting from the combination of the first optical effect layer 12, the reflective material layer 13, and the second optical effect layer 17 will be described.

The optical effect of the display units DP1 and DP3 will be described.
FIG. 4 is a diagram schematically showing an optical effect exhibited by portions corresponding to the first interface portion and the third interface portion in the display body shown in FIGS. 1 and 2. In FIG. 4, 31b and 31c show illumination light, 32b and 32c show regular reflection light or 0th order diffracted light, and 33b shows 1st order diffracted light. In FIG. 4, the first optical effect layer 12 and the reflective material layer 13 are not shown.

  As described above, the minimum center-to-center distance of the concave portion or the convex portion 14b is in the range of 200 nm to 500 nm. If this minimum center distance is reduced, it may be difficult to emit diffracted light from the interface IF1. When the minimum center distance is increased, the intensity of the diffracted light emitted from the first interface IF1 at a relatively small emission angle may be relatively large.

  Note that the minimum center-to-center distance of the concave portion or the convex portion 14b may be within a range of 200 nm to 350 nm, for example. In this case, since the spatial frequency is shortened, diffracted light having a wavelength corresponding to blue is easily observed.

  Alternatively, the minimum center-to-center distance of the concave portion or convex portion 14b may be in the range of 300 nm to 500 nm. In this way, the angular range in which the first-order diffracted light 33b emitted from the concave portion or the convex portion 14b can be observed becomes relatively wide. In other words, in this way, it is possible to more easily discriminate between a genuine product provided with a recess or projection 14b and a counterfeit product provided with no recess or projection 14b.

  In the range of the periodic structure of the concave portion or the convex portion 14b of the first interface portion IF1 and the third interface portion IF3, the reflectance of regular reflection light emitted from the first interface portion IF1 and the third interface portion IF3 is small. Further, the intensity of the diffracted light emitted from the first interface part IF1 and the third interface part IF3 at a relatively small emission angle is zero or extremely small. Therefore, the specularly reflected light or diffracted light emitted from the first interface portion IF1 and the third interface portion IF3 is emitted from the portion of the second optical effect layer 17 corresponding to the first interface portion IF1 or the third interface portion IF3. The effect on the light to be transmitted is relatively small. Therefore, in the display portions DP1 and DP3, the optical effect caused by the second optical effect layer 17 can be visually recognized by an observer very clearly.

Next, the optical effect of the display unit DP2 will be described.
The second interface IF2 is a flat surface as described above. Therefore, the part covered with the reflective material layer 13 of the second interface part IF2 mirrors the illumination light. The intensity of the reflected light is much higher than the light emitted from the corresponding part of the second optical effect layer 17. Thus, the display portion DP 2 is usually observed as a mirror surface.

  In the display body 10, the first to third interface portions IF1 are in the same plane. Therefore, for example, a concave structure and / or convex structure corresponding to the concave portion or convex portion 14b of each interface portion is formed on one original plate, and the concave structure and / or convex structure is transferred to the first optical effect layer 12. Thus, the concave portion or the convex portion 14b can be formed at the same time. Therefore, if the concave structure and / or the convex structure are formed with high accuracy in the original plate, the problem of misalignment between the first to third interface portions cannot occur. In addition, the fine concavo-convex structure and high-precision features enable high-definition image display and facilitate distinction from those produced by other methods. And the fact that genuine products can be manufactured stably with extremely high accuracy makes it easier to distinguish them from counterfeit products and counterfeit products.

  The display body 10 shown in FIGS. 1 and 2 exhibits very special visual effects according to the incident angle of illumination light and the observation angle of the observer.

  Hereinafter, with reference to the normal direction of the display body 10, an angle range including an emission direction of specularly reflected light with respect to specific illumination light is referred to as a “positive angle range”, and includes an incident direction of the specific illumination light. The range is called “negative angle range”. The illumination light is assumed to be white light.

First, consider a case in which illumination light is incident only from a negative angle range and the display body 10 is observed from a positive angle range. In this case, as described above, the display portions DP1 and DP3 show the optical effect caused by the second optical effect layer 17 very clearly. That is, the display parts DP1 and DP3 are visually recognized as areas showing different colors depending on the observation angle. In this case, the display unit DP 2 is usually observed as a mirror surface. That is, the display unit DP 2, when the regular reflection light is observed from the available viewing angle, light of a wavelength corresponding to the illumination light is visible. Thus, when the display body 10 is observed from a positive angle range, the display body 10 includes a region (DP1, DP3) showing different colors according to the observation angle and a region (DP2) provided with a mirror surface. It is visually recognized as including.

  Next, consider a case in which illumination light is incident only from the negative angle range and the display body 10 is observed from the negative angle range. In this case, when the incident angle and the observation angle of the illumination light are deep, that is, when the absolute values of the incident angle and the observation angle are large, the observer can visually recognize the diffracted light from the display portions DP1 and DP3. Therefore, for example, when the position of the light source of the illumination light and the position of the observer are fixed and the angle formed by these and the display body 10 is changed, the visual effects are discontinuous in the display units DP1 and DP3. Changes. Specifically, when the incident angle and the observation angle are increased, the diffracted light from the display unit DP1 can be observed at a certain angle. At this time, since the spatial frequency of the concave portion or the convex portion 14b is different between the first interface portion and the third interface portion, the display portion DP1 and the display portion DP3 show discontinuous optical changes at different angles and are visually different regions. Will become visible.

  Next, assuming that there are two or more light sources of illumination light, assuming a room where fluorescent lamps are provided at a plurality of locations. Specifically, as an example, consider a case where there is a first light source that makes the first illumination light enter from a negative angle range and a second light source that makes the second illumination light enter from a positive angle range. In this case, for example, if the positions of the first and second light sources and the position of the observer are fixed and the angle formed by these and the display body 10 is changed, the visual effects of the visual effects are displayed in the display units DP1 and DP3. Discontinuous changes occur. Specifically, when the observation angle is shallow, the display unit DP1 causes a continuous color change due to the second optical effect layer 17. When the incident angle and the observation angle are increased, the diffracted light from the display portions DP1 and DP3 can be observed with a certain angle as a boundary. At this time, since the spatial frequency of the concave portion or the convex portion 14b is different between the first interface portion IF1 and the third interface portion IF3, the display portion DP1 and the display portion DP3 show discontinuous optical changes at different angles, and visually It will be visually recognized as a different area.

  The boundaries between the first interface IF1, the second interface IF2, and the third interface IF3 can be determined with high accuracy by techniques such as electron beam drawing and nanoimprint. Therefore, when such a configuration is adopted, the boundary between the display portion DP1, the display portion DP2, and the display portion DP3 can be determined with high accuracy. Accordingly, this makes it possible to display a high-definition pattern corresponding to the boundary between the first interface part IF1, the second interface part IF2, and the third interface part IF3 on the display body 10.

  Like the display body of FIG. 1, the display part DP2 is arranged at the boundary between the display part DP1 and the display part DP3, and only the display part DP2 is visually recognized as a mirror surface, so that the contrast stands out. Further, if the shape of the display portion DP2 located at the boundary between the display portion DP1 and the display portion DP3 is linear, it is difficult to forge because the alignment is difficult in silver ink printing or the like. Particularly in this case, it is preferable that the line width of the display portion DP2 is 0.01 mm or more and 0.1 mm or less.

  Further, as another aspect of the display body, as shown in FIG. 5, the display unit DP1 and the display unit DP2 are arranged so that the boundary between the display unit DP3 and the display unit DP3 is connected. By doing so, the apexes of the display portions DP1 to DP3 are shared, and it is difficult to align the same when printing with silver ink or the like.

  Thus, the display body 10 has a very special visual effect. And it is impossible or extremely difficult for a person who attempts to counterfeit to reproduce such a visual effect. That is, the display body 10 has a high anti-counterfeit effect.

  When the second optical effect layer 17 includes cholesteric liquid crystal, the second optical effect layer 17 can emit circularly polarized selective reflection light. Further, the present inventors have found that the diffracted light emitted from the first interface IF1 has linear polarization. Therefore, when the second optical effect layer 17 includes a cholesteric liquid crystal, it is possible to track the change of the emitted light based on the difference in polarization. That is, in this case, the display body 10 is also useful as an anti-counterfeit medium for covert.

Examples of a method for discriminating an article for which it is unknown whether or not it is a genuine product between a genuine product and a non-genuine product include the following methods.
First, as a first operation, the display body 10 is illuminated with illumination light whose absolute value of the incident angle is less than 60 °. At this time, it is confirmed that the optical effect due to the second optical effect layer 17 is observed in an angle range where the absolute value is less than 60 °. For example, when the second optical effect layer 17 includes cholesteric liquid crystal, it is confirmed that selective reflection light from the second optical effect layer 17 is emitted in this angular range.

  Next, as a second operation, the display body 10 is illuminated with illumination light having an absolute angle of incidence of 60 ° or more and less than 90 °. At this time, it is confirmed that the optical effect due to the first interface IF1 is observed in an angle range in which the absolute value is 60 ° or more and less than 90 ° and the above incident angle is equal to positive and negative. That is, it is confirmed that diffracted light from the first interface IF1 is observed in this angular range.

  If the above optical effect is observed in both the first and second operations, the article is determined to be genuine. On the other hand, if each of the above optical effects is not observed in one or both of the first and second operations, it is determined that the article is an improper product.

  In the case where the second optical effect layer 17 includes cholesteric liquid crystal, discrimination between a genuine product and a non-genuine product may be performed as follows. That is, in the first operation, circularly polarized light is emitted in an angle range in which the absolute value is less than 60 °, and in the second operation, the absolute value is 60 ° or more and less than 90 ° and the incident angle described above. If the linearly polarized light is emitted in an angle range in which positive and negative are equal, the article may be determined to be genuine. This determination can be performed by observing the display body 10 through polarizing plates such as a circularly polarizing plate and a linearly polarizing plate.

  6 and 7 are plan views schematically showing an example of an arrangement pattern of concave portions or convex portions that can be employed in the first interface portion and the third interface portion.

  In FIG. 6, the arrangement of the concave or convex portions 14b forms a square lattice. This structure is relatively easy to manufacture using a microfabrication apparatus such as an electron beam drawing apparatus or a stepper, and highly accurate control such as the distance between the centers of the recesses or protrusions 14b is also relatively easy.

  In FIG. 6, the distance between the centers of the recesses or protrusions 14 b is made equal in the X direction and the Y direction, but the distance between the centers of the recesses or protrusions 14 b may be different between the X direction and the Y direction. That is, the arrangement of the concave portions or the convex portions 14b may form a rectangular lattice.

  When the distance between the centers of the concave or convex portions 14b is set to be relatively long in both the X direction and the Y direction, the display body 10 is illuminated from the direction perpendicular to the X direction when the display body 10 is illuminated from the direction perpendicular to the Y direction. The diffracted light can be emitted from the first interface part IF1 or the third interface part IF3 both in the case of illumination, and the wavelength of the diffracted light can be made different between the former and the latter. When the distance between the centers of the recesses or the protrusions 14b is set to be relatively long in one of the X direction and the Y direction, and set to be relatively short on the other side, the display body 10 is illuminated from a direction perpendicular to one of the Y direction and the X direction. In this case, diffracted light is emitted from the first interface IF1, and when the display body 10 is illuminated from a direction perpendicular to the other of the Y direction and the X direction, emission of the diffracted light from the first interface IF1 is prevented. it can.

  In FIG. 7, the arrangement of the concave or convex portions 14b forms a triangular lattice. When this structure is adopted, if the distance between the centers of the recesses or projections 14b is set as appropriate, for example, when the display body 10 is illuminated from the A direction, emission of diffracted light from the first interface IF1 is prevented, and B When the display 10 is illuminated from the direction and the C direction, diffracted light can be emitted from the first interface IF1. That is, a more complicated visual effect can be obtained.

  8 to 10 are enlarged perspective views showing other examples of structures that can be employed in the first interface portion of the display body shown in FIGS. 1 and 2.

  The structure shown in FIGS. 8 to 10 is a modification of the structure shown in FIG. Each of the recesses or protrusions 14b shown in FIGS. 8 to 10 has a forward taper shape.

  In the structure shown in FIG. 3, the concave portion or the convex portion 14b has a conical shape. When the concave or convex portion 14b has a conical shape, the concave or convex portion 14b may have a sharp tip or a truncated conical shape. However, when the concave portion or the convex portion 14b has a conical shape with a sharp tip, the concave portion or the convex portion 14b does not have a surface parallel to the first interface portion IF1, so that it is compared with a truncated conical shape. Thus, the reflectance of the regular reflection light at the first interface portion IF1 can be further reduced.

  In the structure shown in FIG. 8, the concave portion or the convex portion 14b has a quadrangular pyramid shape. The concave portion or the convex portion 14b may have a pyramid shape other than a quadrangular pyramid shape such as a triangular pyramid shape. In this case, the intensity of the diffracted light generated under specific conditions can be increased, and observation is easier. Moreover, when making the recessed part or the convex part 14b into a pyramid shape, the recessed part or the convex part 14b may have a pointed tip, and may have a truncated pyramid shape. However, when the concave portion or the convex portion 14b has a pyramid shape with a sharp tip, the concave portion or the convex portion 14b does not have a surface parallel to the first interface portion IF1, and therefore, compared with a truncated pyramid shape. Thus, the reflectance of the regular reflection light at the first interface portion IF1 can be further reduced.

  In the structure shown in FIG. 9, the concave portion or the convex portion 14b has a semi-spindle shape. That is, the concave portion or the convex portion 14b has a conical shape with a rounded tip. When the structure shown in FIG. 9 is adopted, a convex structure and / or a concave structure is formed on the original plate and from the original plate to the first optical effect layer 12 as compared with the case where the structure shown in FIG. 4 or FIG. 8 is adopted. The transfer of the convex structure and / or the concave structure is easier.

  In the structure shown in FIG. 10, the concave portion or the convex portion 14b has a structure in which a plurality of square pillars having different bottom areas are stacked in order from the largest bottom area. Instead of the quadrangular columns, columnar bodies other than the quadrangular columns such as cylinders and triangular columns may be stacked.

  When the structure shown in FIG. 10 is adopted, as in the case where the structure shown in FIG. 9 is adopted, the convex structure and / or the concave structure is formed on the original plate as compared with the case where the structure shown in FIG. 4 or FIG. 8 is adopted. Further, it is easier to transfer the convex structure and / or the concave structure from the original plate to the first optical effect layer 12.

  The first interface portion IF1 and the third interface portion IF3 may employ different structures from among the convex structure and / or the concave structure in order to make the optical effects different.

  When the depth or height of the concave portion or the convex portion 14b is increased, for example, when the first interface portion IF1 and the third interface portion IF3 are, for example, ½ or more of the distance between the minimum centers, the first interface portion IF1 or The intensity of the reflected light emitted from the third interface part IF3 can be reduced. Therefore, in this way, the optical effect caused by the second optical effect layer 17 in the display unit DP1 can be visually recognized more clearly. In addition, when the first interface portion IF1 or the third interface portion IF3 is configured by a plurality of pixels having different depths or heights of the concave portions or the convex portions 14b, gradation display is performed at the first interface portion IF1 or the third interface portion IF3. It can be carried out.

  The display body 10 described above may be used as, for example, an adhesive label such as a seal label, a transfer foil such as a stripe transfer foil and a spot transfer foil, or a part of a thread. Alternatively, the display body 10 may be used as part of a tier tape.

  FIG. 11 is a cross-sectional view schematically showing an adhesive label according to one embodiment of the present invention. An adhesive label 100 shown in FIG. 11 includes the display body 10 shown in FIGS. 1 and 2 and an adhesive layer 30 provided on the display body 10.

  The pressure-sensitive adhesive layer 30 is provided on the main surface of the base 11 opposite to the second optical effect layer 17. The adhesive layer 30 faces the second optical effect layer 17 with the first optical effect layer 12 and the reflective material layer 13 interposed therebetween. As a material for the pressure-sensitive adhesive layer 30, for example, a pressure-sensitive adhesive is used. The pressure-sensitive adhesive layer 30 is formed, for example, by applying the mixture of the adhesive and the solvent by a method such as gravure coating, roll coating, screen coating, and blade coating. In addition, the thickness of the adhesion layer 30 shall be in the range of 1 micrometer thru | or 10 micrometers, for example.

  The adhesive label 100 is affixed to, for example, an article whose authenticity is to be confirmed, or is attached to another article such as a tag base material to be attached to such an article. Thereby, the forgery prevention effect can be provided to the said article | item.

  In addition, by further providing a brittle layer between the display body 10 and the pressure-sensitive adhesive layer 30, it is possible to impart an anti-replacement function to the pressure-sensitive adhesive label 100. Thereby, a further higher forgery prevention effect can be achieved.

  FIG. 12 is a cross-sectional view schematically illustrating a transfer foil according to an aspect of the present invention. A transfer foil 200 shown in FIG. 12 includes the display body 10 shown in FIGS. 1 and 2 and a support layer 45 that supports the display body 10 in a peelable manner. In FIG. 12, as an example, a release layer 43 is provided between the second optical effect layer 17 and the support layer 45, and the main surface of the substrate 11 is opposite to the second optical effect layer 17. The case where the adhesive layer 41 is provided on the main surface is drawn.

  The support layer 45 is, for example, a film or sheet made of resin. As a material of the support layer 45, for example, polyethylene terephthalate resin, polyethylene naphthalate resin, polyimide resin, polyethylene resin, polypropylene resin, or vinyl chloride resin is used.

  The release layer 43 has a role of facilitating the release of the support layer 45 when the transfer foil 200 is transferred to the transfer target. As the material of the release layer 43, for example, the resins mentioned above as the material of the relief structure forming layer 110 are used. The release layer 43 may further contain additives such as paraffin wax, carnauba wax, polyethylene wax, and silicone. Note that the thickness of the release layer 43 is, for example, in the range of 0.5 μm to 5 μm.

  As the material of the adhesive layer 41, for example, an adhesive such as a reactive curable adhesive, a solvent-volatile adhesive, a hot melt adhesive, an electron beam curable adhesive, and a heat sensitive adhesive is used.

  As the reaction curable adhesive, for example, polyurethane resins such as polyester urethane, polyether urethane, and acrylic urethane, or epoxy resins are used.

Solvent volatilization type adhesives include, for example, aqueous emulsion adhesives including vinyl acetate resin, acrylate copolymer resin, ethylene-vinyl acetate copolymer resin, ionomer resin and urethane resin, natural rubber, styrene-butadiene A latex adhesive containing a copolymer resin and an acrylonitrile-butadiene copolymer resin is used.

  As the hot melt adhesive, for example, an adhesive containing ethylene-vinyl acetate copolymer resin, ethylene-ethyl acrylate copolymer resin, polyester resin, polycarbonate resin, polyvinyl ether resin, polyurethane resin, or the like as a base resin is used.

  As the electron beam curable adhesive, for example, an adhesive mainly containing an oligomer having one or more vinyl functional groups such as acryloyl group, allyl group and vinyl group is used. For example, as an electron beam curable adhesive, a mixture of polyester acrylate, polyester methacrylate, epoxy acrylate, epoxy methacrylate, urethane acrylate, urethane methacrylate, polyether acrylate or polyether methacrylate and an adhesion-imparting agent can be used. As the adhesion-imparting agent, for example, an acrylate containing phosphorus or a derivative thereof, or an acrylate containing a carboxy group or a derivative thereof is used.

  As the heat-sensitive adhesive, for example, polyester resin, acrylic resin, vinyl chloride resin, polyamide resin, polyvinyl acetate resin, rubber resin, ethylene-vinyl acetate copolymer resin, or vinyl chloride-vinyl acetate copolymer resin is used.

  The adhesive layer 41 is obtained, for example, by applying the above-described resin onto the substrate 11 using a coater such as a gravure coater, a micro gravure coater, or a roll coater.

  The transfer foil 200 is transferred to a transfer target by, for example, a roll transfer machine or a hot stamp. At this time, peeling occurs in the peeling protection layer 43, and the display body 10 is attached to the transfer target body via the adhesive layer 41.

  As described above, the display body 10 has an excellent anti-counterfeit effect. Therefore, when the display body 10 is supported by an article, it is difficult to forge the genuine article with the display body. In addition, since the display body 10 has the above-described visual effect, it is easy to determine an article whose authenticity is unknown between a genuine product and a non-genuine product.

  FIG. 13 is a schematic view schematically illustrating an example of an article with a display body. FIG. 13 shows a printed matter 300 as an example of an article with a display body. The printed material 300 is a gift certificate and includes a printed material main body 60.

  The printed material main body 60 includes a base material 61. The base material 61 is, for example, paper in which at least a portion corresponding to the display body 10 has light transmittance. A printed layer 61 is formed on the substrate 61. The display body 10 described above is fixed to the surface of the substrate 61 on which the printing layer 61 is formed. The display body 10 is fixed to the base material 61, for example, by being attached via an adhesive layer or an adhesive layer.

  Since the printed material 300 includes the display body 10, it is difficult to forge it. In addition, since the printed matter 300 includes the display body 10, it is easy to determine an article whose authenticity is unknown between genuine and non-authentic.

  The display body 10 included in the printed material 300 shown in FIG. 13 has the same configuration as the display body 10 shown in FIGS. 1 and 2 except for the following points. First, in the display body 10 included in the printed material 300 illustrated in FIG. 13, the base material 11 is omitted. In the display body 10, the second optical effect layer 17 faces the reflective material layer 13 with the first optical effect layer 12 interposed therebetween. In the display 10, the light transmission layer 15 is interposed between the reflective material layer 13 and the base material 61.

  In FIG. 13, a gift certificate is illustrated as the printed material 300 including the display body 10, but the printed material including the display body 10 is not limited thereto. For example, the printed matter including the display body 10 may be other securities such as stock certificates.

  Alternatively, the printed matter including the display body 10 may be a card such as an ID (identification) card, a magnetic card, a wireless card, and an IC (integrated circuit) card. Alternatively, the printed matter including the display body 10 may be a tag to be attached to an article to be confirmed as a genuine product. Alternatively, the printed matter including the display body 10 may be a package body that contains an article to be confirmed to be genuine or a part thereof. In these cases, as the material of the base material 61, for example, a plastic having optical transparency is used.

  In the printed material 300 illustrated in FIG. 13, the display body 10 is attached to the base material 61, but the display body 10 may be supported on the base material 61 by another method.

  For example, when paper is used as the substrate 61, the display body 10 may be embedded in the paper. In this case, for example, the display body 10 may be inserted into the paper.

  When such a configuration is adopted, the display body 10 is typically formed into a thread shape, and typically on one main surface of the display body 10 processed into the thread shape, Apply hot melt adhesive.

  For example, the display body 10 is embedded in the paper as follows.

  First, a paper material composed of cellulose fibers and a dispersion medium is prepared. Next, two undried fiber layers formed by spreading this stock are prepared using a two-tank type circular paper machine. And when these two fiber layers are overlap | superposed, said display body 10 is sent out between these fiber layers. Thereafter, the laminated structure of the two fiber layers and the display body 10 interposed between them is subjected to a drying process. Next, cutting is performed as necessary. In this way, a paper in which the display body 10 is embedded is obtained.

  Alternatively, the display body 10 may be embedded in the paper as follows.

  For example, this embedding may be performed using a long paper machine. Specifically, first, the display body 10 dispersed in the dispersion medium is introduced into the flow of the stock made of cellulose fibers and the dispersion medium through a nozzle. In this way, the display body 10 is embedded in the paper web formed on the papermaking net. Thereafter, this is subjected to a drying treatment. Next, cutting is performed as necessary. In this way, a paper in which the display body 10 is embedded is obtained.

  When paper is used as the substrate 61, the paper may be opened at all or a part of the position corresponding to the display body 10.

  FIG. 14 is a cross-sectional view schematically showing another example of an article with a display body.

In the display body 10 included in the printed matter 300 shown in FIG. 14, the base material 11 is omitted, and the interface portion and the reflective material layer 13 provided on one main surface of the first optical effect layer 12. The configuration is the same as that of the display shown in FIG. 15 except that the configuration is different.

  The article with a display body shown in FIG. 14 is a printed material 300, and the base material 61 is made of paper. A display body 10 is embedded in the paper. In addition, an opening AP is provided in a part of the position corresponding to the paper display body 10. That is, in each of these openings AP, a part of the display body 10 is exposed to the outside. When such a configuration is adopted, the display body 10 is difficult to drop off from the base material 61. In addition, at the position where the aperture AP is provided, the influence of the light scattering property of the paper on the optical characteristics of the display body 10 can be minimized.

  As a material of the base material 61, materials other than paper may be used. For example, a resin in which at least a portion corresponding to the display body 10 has light transmittance may be used as this material. In this case, the display body 10 may be embedded in the base material 61. Alternatively, when the light scattering property of at least the part corresponding to the display body 10 of the base material 61 is small, for example, when this part is transparent, the reverse side of the back surface of the base material 61, that is, the surface on which the printing layer 61 is provided. The display body 10 may be fixed to the side surface.

  The article with a display body may not be a printed matter. That is, the display body 10 may be supported on an article that does not include a printed layer.

  The display body 10 may be used for purposes other than forgery prevention. For example, the display body 10 can be used as a toy, a learning material, or a decoration.

  First, a biaxially stretched polyester film (PET film; E5100, manufactured by Toyobo Co., Ltd.) having a thickness of 12 μm was prepared as the support layer 45. Moreover, the ink which has the following composition was prepared. Hereinafter, this ink is referred to as “ink 1”.

Photopolymerizable nematic liquid crystal (Paliocolor LC242, manufactured by BASF): 100 parts by mass; Chiral agent (Paliocolor LC756, manufactured by BASF): 4.8 parts by mass;
Polymerization initiator (Irgacure 369, manufactured by Ciba Specialty Chemicals): 5 parts by mass;
Solvent (methyl ethyl ketone): 200 parts by mass.

Next, the ink 1 was apply | coated by thickness of 5 micrometers on said biaxially-stretched polyester film. This was dried in a 120 ° C. drying oven to align liquid crystal molecules. Next, in this state, a 120 W / cm high-pressure mercury lamp was irradiated with 500 mJ / cm ² . Thus, the layer containing the cholesteric liquid crystal was cured to obtain the second optical effect layer 17.

  Subsequently, an ink having the following composition was prepared. Hereinafter, this ink is referred to as “ink 2”.

Two-component curable urethane ink (K448, manufactured by Toyo Ink): 100 parts by mass;
Isocyanate curing agent (UR100B, manufactured by Toyo Ink): 10 parts by mass;
Solvent (methyl ethyl ketone): 10 parts by mass.

  Next, the ink 2 was applied to the thickness of 2 μm on the second optical effect layer 17 using a gravure method. After drying, it was aged at 40 ° C. for 3 days. In this way, a layer made of resin was obtained.

Next, a nickel electroforming plate having a concave structure and / or a convex structure was prepared. In this nickel electroforming plate, first, a region (first interface portion IF1) that is two-dimensionally arranged at a spatial frequency of 2500 lines / mm and that has a plurality of convex portions each having a forward taper shape. A region composed of a plurality of convex portions that are two-dimensionally arranged at a spatial frequency of 2000 lines / mm and each have a forward tapered shape (corresponding to the third interface portion IF3), and a flat region (Corresponding to the second interface part IF2) was formed.
This nickel electroforming plate was mounted on a cylinder roll, and hot pressure embossing was performed on the layer made of the resin. Thus, the 1st optical effect layer 12 provided with 1st interface part IF-IF3 as shown in FIG. 5 was obtained.

  Then, aluminum was vapor-deposited on the main surface in which interface part IF1-IF3 of the 1st optical effect layer 12 was provided using the vacuum evaporation method. In this way, a reflective material layer 13 having a thickness of 500 mm was obtained.

  Subsequently, a reaction curable adhesive made of ink having the following composition was prepared. Hereinafter, this ink is referred to as “ink 3”.

Polyester resin (Byron 240, manufactured by Toyobo): 100 parts by mass;
Block isocyanate (TPA-B80X, manufactured by Asahi Kasei Chemicals): 2 parts by mass;
Solvent (toluene): 100 parts by mass;
Solvent (methyl ethyl ketone): 100 parts by mass.

  This reactive curable adhesive made of ink 3 was applied on the reflective material layer 13 to a thickness of about 10 μm by using a microgravure method. In this way, an adhesive layer 41 was obtained.

  The transfer foil 200 provided with the display body 10 was manufactured as described above. The transfer foil 200 was thermocompression bonded to a gift certificate paper at 160 ° C. for 10 seconds. At the same time, the PET film as the support layer 45 was peeled off. In this way, a printed material 300 to which the display body 10 was transferred was obtained.

  In the display body of the example, the color shift image and the diffraction structure image were perfectly aligned, and a high anti-counterfeiting effect could be achieved.

  DESCRIPTION OF SYMBOLS 10 ... Display body, 11 ... Base material, 12 ... 1st optical effect layer, 13 ... Reflective material layer, 14a ... Groove, 14b ... Concave part or convex part, 15 ... Light transmission layer, 17 ... 2nd optical effect layer, DESCRIPTION OF SYMBOLS 21 ... Light-transmitting base material, 23 ... Light absorption layer, 25 ... Adhesive layer, 30 ... Adhesive layer, 31a ... Illumination light, 31b ... Illumination light, 31c ... Illumination light, 32a ... Regular reflection light, 32b ... Regular reflection light 32c ... Regular reflection light, 33a ... First order diffracted light, 33b ... First order diffracted light, 41 ... Adhesive layer, 43 ... Release layer, 45 ... Support layer, 60 ... Printed body, 61 ... Base material, 62 ... Print layer, DESCRIPTION OF SYMBOLS 100 ... Adhesive label, 200 ... Transfer foil, 300 ... Printed matter, AP ... Opening, DP1 ... Display part, DP2 ... Display part, DP3 ... Display part, DP3 '... Display part, IF1 ... First interface part, IF2 ... Second Interface part, IF3 ... third interface part.

Claims (5)

A plurality of recesses or projections arranged in a two-dimensional periodic structure with a minimum center-to-center distance in the range of 200 nm to 500 nm and an aspect ratio in the range of 0.5 to 1.5; A first interface having a surface coated with a reflective material layer; a second interface having a flat surface coated with a reflective material layer;
Arranged with a two-dimensional periodic structure having a spatial frequency different from that of the first interface portion within a range of a minimum center distance within a range of 200 nm to 500 nm and an aspect ratio of 0.5 to 1.5. A plurality of concave portions or convex portions, the third interface portion of which the surface is coated with a reflective material layer is included on one surface, and the second interface portion is both the first interface portion and the third interface portion. A first optical effect layer disposed in contact with the boundary;
A portion that faces the reflective material layer with the first optical effect layer interposed therebetween, or a portion that faces the first optical effect layer with the reflective material layer interposed therebetween, and includes a cholesteric liquid crystal, a pearl pigment, and A second optical effect layer including at least one of the multilayer interference films,
The first optical effect layer is made of a photocurable resin, and the addition amount of the photopolymerization initiator added to the photocurable resin is within a range of 0.5 to 5% by mass with respect to the photocurable resin. Ah is, the second interface unit is a linear region, the display body linewidth is characterized in that it is 0.01mm or more 0.1mm or less. The display body according to claim 1 , wherein each of the first interface part, the second interface part, and the third interface part shares one point of the boundary of the region. A substrate, a display body with articles; and a display body according to claim 1 or 2 supported on the substrate. The article with a display body according to claim 3 , wherein the base material is paper, and the display body is embedded in the paper. The article with a display body according to claim 4 , wherein the display body has a thread shape.

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