WO2004024439A1 - 多層薄膜フィルムを用いた対象物の識別媒体 - Google Patents
多層薄膜フィルムを用いた対象物の識別媒体 Download PDFInfo
- Publication number
- WO2004024439A1 WO2004024439A1 PCT/JP2003/011716 JP0311716W WO2004024439A1 WO 2004024439 A1 WO2004024439 A1 WO 2004024439A1 JP 0311716 W JP0311716 W JP 0311716W WO 2004024439 A1 WO2004024439 A1 WO 2004024439A1
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- WO
- WIPO (PCT)
- Prior art keywords
- thin film
- multilayer thin
- identification medium
- layer
- film
- Prior art date
Links
- 239000010409 thin film Substances 0.000 title claims abstract description 152
- 239000010410 layer Substances 0.000 claims description 125
- 238000004049 embossing Methods 0.000 claims description 51
- 239000000463 material Substances 0.000 claims description 50
- 239000010408 film Substances 0.000 claims description 49
- 238000000034 method Methods 0.000 claims description 21
- 239000012790 adhesive layer Substances 0.000 claims description 20
- 229920005989 resin Polymers 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 10
- 239000000049 pigment Substances 0.000 claims description 8
- 238000010030 laminating Methods 0.000 claims description 7
- 230000001747 exhibiting effect Effects 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 5
- 229920001187 thermosetting polymer Polymers 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 2
- 238000001723 curing Methods 0.000 claims 1
- 230000005865 ionizing radiation Effects 0.000 claims 1
- 238000003847 radiation curing Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 22
- 239000000123 paper Substances 0.000 description 34
- 239000011888 foil Substances 0.000 description 15
- 239000000853 adhesive Substances 0.000 description 13
- 230000001070 adhesive effect Effects 0.000 description 13
- 230000000694 effects Effects 0.000 description 11
- 238000012546 transfer Methods 0.000 description 10
- 239000000976 ink Substances 0.000 description 9
- 230000003287 optical effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- -1 polyethylene Polymers 0.000 description 6
- 238000007639 printing Methods 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000003086 colorant Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 238000007740 vapor deposition Methods 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 239000004986 Cholesteric liquid crystals (ChLC) Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002070 germicidal effect Effects 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 2
- 229920006337 unsaturated polyester resin Polymers 0.000 description 2
- 150000003673 urethanes Chemical class 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920010524 Syndiotactic polystyrene Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
- G03H1/024—Hologram nature or properties
- G03H1/0244—Surface relief holograms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
- B41M3/148—Transitory images, i.e. images only visible from certain viewing angles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
- B42D25/29—Securities; Bank notes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
- D21H21/44—Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/0005—Adaptation of holography to specific applications
- G03H1/0011—Adaptation of holography to specific applications for security or authentication
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2250/00—Laminate comprising a hologram layer
- G03H2250/36—Conform enhancement layer
Definitions
- the present invention relates to the authenticity of planar objects or various three-dimensional objects such as packages, passports, cards, banknotes, vouchers, certificates, certificates, gift certificates, paintings, tickets, public competition voting tickets, etc.
- the present invention relates to an identification medium for identifying gender. Background art
- a technique of attaching a hologram to a surface of an object or applying a special ink is known.
- identification was performed by visually checking that the pattern changed depending on the viewing angle and viewing angle.
- special inks include fluorescent inks and magnetic inks.When these inks are used, they are not visually different from ordinary inks, but they can be detected by irradiating ultraviolet rays or detecting them with a magnetic sensor. The object can be identified by the hidden information.
- a cholesteric liquid crystal ink or film is used as a medium for identifying an object.
- a film whose reflection characteristics show selective reflection of light depending on the viewing angle is used, and as a method of preventing forgery of cards and certificates.
- a cholesteric liquid crystal ink or film is used as a medium for identifying an object.
- Is well known. See, for example, Japanese Patent No. 3244428, page 7, page 1, FIG. 2, FIG. 2
- high cost technology is required.
- fluorescent inks and magnetic inks have drawbacks in that similar products are easily available and thus forgery is easy, and the identification device is large-scale and requires a power source, so that it is inconvenient to use.
- cholesteric liquid crystal which is used as a raw material of an identification medium for an object, has a high cost, and the manufacturing cost of the identification medium is relatively high.
- An object of the present invention is to provide a medium for identifying an object, which is easy and reliable, and which can reduce the manufacturing cost. Disclosure of the invention
- An object of the present invention is an object identification medium for identifying an object by optically recognizing an identification indication on the object to identify the authenticity of the object. It is characterized by fixing a multilayer thin film that shows selective reflection of light that depends on. Further, the present invention is an object identification medium for identifying the authenticity of an object by providing an identification mark on the object so as to be optically recognizable, wherein the medium has a reflection characteristic dependent on a viewing angle. A concealing sheet is fixed to a part of the surface of the multilayer thin film film exhibiting reflection.
- FIG. 1 is a diagram showing how light incident on a multilayer thin film is selectively reflected on each layer.
- white light is incident on a multilayer thin film
- the light is reflected, absorbed, and transmitted according to its wavelength.
- the reflected light interferes with each other due to the optical path difference of reflection in each layer, and only light in a specific wavelength range is emitted.
- the reflection wavelength and the reflectance can be obtained by the following equations.
- ⁇ reflection wavelength
- ⁇ ⁇ layer refractive index
- nB B layer refractive index
- ⁇ reflection angle d A: A layer thickness
- dB B layer thickness
- R reflectance
- the selective reflection wavelength range can be arbitrarily set according to the refractive index and the thickness of the material such as a polymer constituting each layer, the number of layers, and the like.
- Figure 2 shows a state where a specific wavelength is selectively reflected.
- the multilayer thin film has a feature that the color changes depending on the viewing angle. This is because the center wavelength ⁇ shifts to the shorter wavelength side when the incident light is oblique because the film thickness dA and dB apparently decrease.
- This phenomenon can be explained as follows. That is, the incident light is reflected at each interface of the multilayer thin film due to the difference in the refractive index, and the reflected light is reflected in accordance with the optical path difference. Interfere with each other. This optical path difference becomes smaller as the light enters and reflects from the surface at an angle close to parallel.
- the optical path difference between the reflected light beams reflected at each interface becomes smaller, and the wavelength of the interference increases and shifts to the shorter wavelength side.
- the multilayer thin film is gradually tilted from the state viewed from the front, it can be observed that the light that interferes and strengthens shifts to the shorter wavelength side.
- the reflection color of a multilayer thin film that becomes red when observed at normal incidence becomes orange, yellow, and green as the viewing angle increases (that is, as the multilayer thin film is tilted).
- Blue-green, and blue are observed to change sequentially (color shift). For this reason, it is necessary to observe the presence or absence of color change by attaching an identification medium in which a multilayer thin film that reflects light selectively reflects light whose viewing angle depends on the viewing angle to a part of the support.
- an identification medium in which a multilayer thin film that reflects light selectively reflects light whose viewing angle depends on the viewing angle to a part of the support.
- the viewing angle is defined as the angle between the line of sight and the normal to the surface to be observed.
- the viewing angle is 0 ° because the line of sight and the line perpendicular to the observation target surface match. Also, the viewing angle becomes larger (closer to 90 °) as viewed from an angle more parallel to the observation target surface.
- the identification medium is viewed from a predetermined angle (for example, from the front) since the multilayer thin film has the same color as the surrounding portion, the boundary is not so clear.
- the color shift of the multilayer thin film changes the color of the multilayer thin film, but the surrounding color remains unchanged, so the multilayer thin film gradually stands out from the surroundings. Go on. Therefore, anyone can easily and reliably identify the identification medium visually.
- the concealing sheet is fixed to the surface of the multilayer thin film, it is preferable to transfer the foil to a part of the multilayer thin film by foil transfer.
- any material other than foil such as paper, a plastic sheet, or a paint for printing, can be used.
- the same effect as described above can be obtained by using a concealing sheet having a color equivalent to the color when the multilayer thin film is viewed from a predetermined angle (for example, a front surface).
- a predetermined angle for example, a front surface.
- the gloss of the multilayer thin film is similar to the gloss of the foil, so that the color change of the surrounding multilayer thin film can give a dramatic impression.
- Multilayer thin films can be cut freely into strips, cut into fibers, crushed into small pieces, or processed freely because of their good workability.
- a band-like film or a fibrous film can be fixed to a support by being sandwiched between supports divided into two layers. In this case, an opening for visually confirming the cut multilayer thin film is provided in one or more layers of the support divided into two layers.
- the strip-shaped, fibrous, or small multi-layered thin film can be fixed by, for example, embedding in the middle of papermaking when the support is paper.
- the multilayer thin film is not completely exposed on the surface, but the brightness is higher than the reflection of the surrounding paper support, so that the visibility is less reduced.
- the light absorbing layer has a structure sandwiched between the first and second multilayer thin films. According to this aspect, color shift characteristics can be obtained on both sides of the obtained structure. Therefore, when this structure is processed into a band shape or a fiber shape, the function of the color shift is not lost even if the structure is twisted and reversed. In addition, even when processed into small pieces and scattered at a predetermined location, the above optical characteristics can be obtained on both sides, so that the front and back sides do not pose a problem.
- the light absorbing layer is made of a material that absorbs visible light.
- a black or dark resin material can be used as the light absorbing layer.
- Hardened paints and adhesives with black or dark pigments added can be used as a light absorbing layer.
- Either surface of the multilayer thin film is more preferably holographically processed or embossed. It is extremely difficult to manufacture counterfeit products when the optical effects of the multilayer thin film and the hologram or the optical effects of embossing are combined.
- the hologram processing is used to form characters and designs by embossing, and the characters reflected by the embossed surface and diffracted by the multilayer thin film are refracted by the multi-layer thin film so that the characters and designs can be seen in a floating manner. is there. Also, by looking at the light reflected and diffracted by the multilayer thin film through the embossed surface, the hologram-processed characters and designs can be seen as if they were raised. Therefore, the effect of the hologram and the effect of the color shift of the multilayer film are synergized.
- the hologram processing or embossing processing may be directly applied to the multilayer thin film exhibiting color shift.
- embossing and embossing may not be performed effectively when a material and a structure that causes a color shift to occur more clearly are selected.
- the first factor is that when embossing or embossing is performed on a material combination that clearly causes a color shift, the deformation due to the processing is restored due to the elasticity of the material.
- the second factor is that, in a multilayer structure, a slight shift occurs between the layers during processing, thereby lowering the processing accuracy of embossing and embossing.
- a film of a material suitable for embossing or embossing may be laminated as a layer to be processed on a multilayer thin film, and the film may be embossed or embossed. By doing so, a good color shift function can be obtained, and the intended embossing and embossing can be performed.
- the film made of a material suitable for embossing or embossing may be one layer or two or more layers.
- Materials suitable for embossing and embossing include thermosetting resins, ionizing radiation-curable resins, and ultraviolet-curable resins.
- thermosetting resin examples include an unsaturated polyester resin, an acrylic-modified urethane resin, an epoxy-modified acrylic resin, and the like. These materials have materials in which traces of embossing and embossing are easily left. Layers suitable for embossing and embossing can be sprayed, coated, transferred, printed, etc. May be a layer formed by. According to this embodiment, it is possible to obtain a configuration that maximizes both optical characteristics of the color shift and the hologram.
- a layer for causing a color shift and a starting material for a layer (layer to be processed) for embossing or embossing are laminated, and the laminate is stretched to form a multilayer thin film.
- An example of embossing the multilayer thin film can be given.
- a multilayer thin film portion for causing a color shift is formed first by a stretching technique, and embossing or embossing is performed on the front surface and Z or the rear surface of the multilayer thin film portion.
- An example is given in which a layer to be processed is sprayed, laminated by a method such as coating, transfer, or printing, followed by embossing or embossing. In this way, it is possible to obtain a multilayer thin film that shows a color shift and has been subjected to embossing and embossing.
- the refractive index of a layer (layer to be processed) made of a material suitable for embossing and embossing is different from the refractive index of the multilayer thin film for causing a color shift, the light is incident on the interface between the two. Light reflects. Therefore, from a functional point of view, the layer to be processed can be regarded as a part of the multilayer thin film that causes the color shift.
- a colored or preferably black pigment or dye is added to the adhesive layer or the adhesive layer for fixing the identification medium to the object, or the surface of the identification medium facing the object is colored, preferably It is preferable that black printing or foil transfer is performed. According to such an embodiment, the brightness of the multilayer thin film is further increased, the visibility is improved, and it becomes extremely easy to distinguish a counterfeit product from a genuine product. Also, when the multi-layer thin film is embedded in the support, it can be clearly recognized.
- a fluorescent material layer or a phosphorescent material layer is partially provided between an adhesive layer or an adhesive layer containing a colored, preferably black pigment for fixing the identification medium to an object, or a black printed layer and a multilayer thin film. It is a preferred embodiment that they are sandwiched between them.
- the identification medium having this configuration is irradiated with a normal light beam, the identification medium has a fluorescent material layer or The phosphorescent layer looks only white and only the metallic luster color of the multilayer thin film is illuminated.
- the multilayer thin film stops reacting, and the phosphor layer or the phosphorescent layer emits strong light, and depending on the type of phosphor or phosphorescent, emits colored light.
- the same effect can be exhibited by simply interposing the fluorescent material layer or the phosphorescent material layer between the adhesive layer or the adhesive layer and the multilayer thin film. By utilizing this fact, it can be used for authenticity determination using a black light / germicidal lamp.
- a cut is made partially in the support.
- a cut can be formed by laminating a support on a release paper via an adhesive layer, and half-cutting the support and the adhesive layer using a pressing mold in this state. In this case, all parts other than the release paper are cut off, but the adhesive layer rejoins, so that only the support remains in a cut-off state.
- the identification medium having such a cut is attached to the object and the support is peeled from the object, the support is torn by being pulled by the adhesive layer partially fixed to the object. With such a configuration, it becomes impossible to peel the identification medium from the discarded package and attach it to the imitation product for use.
- Notches may be cut not only in the support but also in the multilayer thin film.
- the thickness of one layer In order to obtain a color shift, the thickness of one layer must be controlled to about 0.05 to 0.3 / m. Obtaining such a thin film with a single layer requires high-cost technology in terms of ensuring uniformity.However, a film of a certain thickness is laminated in multiple layers, and the film is stretched to a specified thickness. Techniques that reduce the thickness can solve this problem.
- the amount of reflected light is insufficient, so that a multilayer structure in which a large number of layers are laminated is required to obtain a highly visible color shift.
- the laminating stretching method of stretching the resulting material is advantageous.
- the adhesion between the layers can be increased, and a multilayer thin film with high integrity can be obtained.
- a positive or negative change in the refractive index can be generated by stretching, and by using this phenomenon, it can be composed of multiple thin film films having a refractive index difference suitable for color shift. Multi-layer thin film You.
- FIG. 1 is a sectional view showing a multilayer thin film for explaining the principle of the present invention.
- FIG. 2 is a diagram showing selective reflection of a multilayer thin film for explaining the principle of the present invention.
- FIG. 3 is a plan view showing an identification medium to which a multilayer thin film is partially adhered.
- FIG. 4 is a plan view showing an identification medium in which a multilayer thin film is partially adhered, and other portions are printed in colors equivalent to colors when viewed from a predetermined angle.
- FIG. 5 is a perspective view illustrating a state in which a multilayer thin film cut into a band shape is partially sandwiched between supports having openings.
- FIG. 6 is a plan view showing an identification medium in which a multilayered thin film cut into a band is sandwiched between supports and is visible from an opening.
- FIG. 7 is a plan view showing a discrimination medium having a structure in which a multi-layered thin film cut into a fibrous shape is cut into paper.
- FIG. 8 is a plan view showing an identification medium having a structure in which a multilayer thin film cut into small pieces is cut into paper.
- FIG. 9 is a cross-sectional view showing a state where hologram processing has been performed on the multilayer thin film.
- FIG. 10 is a sectional view showing a state of a conventional hologram forming layer.
- FIG. 11 is a conceptual diagram showing an outline of an apparatus for manufacturing an identification medium.
- FIG. 12 is a perspective view showing an outline of a drum for obtaining a paper material.
- FIG. 13 is a perspective view showing an outline of an identification medium.
- FIG. 14 is a sectional view showing an outline of the identification medium.
- FIG. 15 is a perspective view showing an outline of an object provided with an identification medium.
- FIG. 16 is a cross-sectional view showing before (A) and after (B) the hologram processing is performed on the multilayer thin film film.
- FIG. 17 is a cross-sectional view showing before (A) and after (B) the hologram processing is performed on the layer to be processed.
- FIG. 18 is a cross-sectional view showing an example (A) and another example (B) showing a structure for fixing a multilayer thin film film having a layer to be processed on which hologram processing is performed to an object.
- FIG. 19 is a cross-sectional view showing the structure of a multilayer thin film film having a layer to be subjected to hologram processing.
- the multilayer thin film can be manufactured by a known method disclosed in JP-A-2000-141567, JP-A-2000-326467, and the like. For example, from polyethylene 1,2,6-naphthalate containing 0.001 to 0.5% by weight of inert particles such as silica, alumina and calcium carbonate having an average particle size of 0.01 to 2 / m2. Layers (layer A) and layers of copolyethylene terephthalate with a melting point of 210 to 245 ° C (layer B) are alternately laminated at least 11 layers in total. A laminate having a transition point (Tg) difference of 40 ° C or more is obtained. Then, the laminate is uniaxially stretched so that the thickness of each of the layer A and the layer B is 0.05 to 0.3 m.
- Tg transition point
- A 101 layers of polyethylene mono 2,6-naphthalate
- layer B 100 layers of polyethylene terephthalate copolymerized with 12% by mole of isophthalic acid
- a one-layer unstretched sheet is prepared. This sheet was stretched 3.5 times in the longitudinal direction at a temperature of 140 ° C, further stretched 5.7 times in the transverse direction at a temperature of 150 ° C, and heat-treated at 210 ° C. A laminated structure with a total thickness of 20 can be obtained.
- polyethylene 1,2,6-naphthalate containing 0.001 to 0.5% by weight of one kind of inert particles of silica, alumina, calcium carbonate and the like having an average particle diameter of 0.01 to 2 IB Layer (layer A) and syndiotactic polystyrene Layers (Layer B) are alternately laminated in a total of 11 layers, and stretched in one axis direction so that the thickness of each of the A layer and the B layer is 0.05 to 0.3 m. May be. By stretching, the adhesion between adjacent layers is increased, and a multilayer structure in which the layers are integrated can be obtained.
- Some resin materials exhibit a change in which the refractive index increases or decreases by stretching. Therefore, when a film obtained by alternately laminating a film material whose refractive index increases by stretching and a film material whose refractive index decreases by stretching is stretched, the difference in refractive index between adjacent layers becomes large, which is a more preferable characteristic as a material exhibiting a color shift. Is obtained.
- a material whose refractive index is increased by stretching includes PVC (polyvinyl chloride), and a material whose refractive index is decreased by stretching is PMMA (acrylic).
- the support can be composed of polypropylene, polyester, PET, TAC, paper, and the like.
- the support may be printed in the same color (for example, red) as when the multilayer thin film is viewed from a predetermined direction (for example, from the front).
- the above film is placed thereon and fixed by an adhesive, an adhesive or thermal transfer.
- the concealing sheet can be made of metal foil, plastic sheet, paper, paint, or the like.
- FIG. 3 is a diagram showing the identification medium 10 in which the pattern 20 made of the multilayer thin film is fixed to the support 30 as described above. When viewing the identification medium 10 while changing the viewing angle, only the portion of the design 20 composed of the multilayer thin film changes to various colors, and the support 30 does not change. Since the presence of the pattern 20 is noticeable depending on the presence or absence of this change, it can be easily distinguished from the imitation.
- a multilayer thin film may be used as the support 30 and a foil such as an aluminum foil may be transferred to the surface of the support 30 to form the design 20 in a portion where the foil does not exist.
- a foil such as an aluminum foil
- the viewing angle of the identification medium 10 is changed, only the portion of the pattern 20 composed of the multilayer thin film changes to various colors, and the foil does not change.
- the presence of the pattern 20 is noticeable depending on the presence or absence of this change, so it is easy to distinguish it from the imitation. it can.
- FIG. 4 is a diagram showing the identification medium 11 in which the same color as when the multilayer thin film is viewed from a predetermined direction is foil-transferred to portions other than the pattern 20 in the identification medium 10 in FIG. It is.
- the identification medium 11 When the identification medium 11 is viewed from a predetermined direction, the boundary between the design 20 composed of the multilayer thin film and the foil transfer portion 31 does not stick out, and it is difficult to visually recognize the kind of pattern.
- the viewing angle is gradually increased, the color of the pattern 20 shifts toward the blue side due to the color shift, and the color tone difference between the pattern 20 and the foil transfer portion 31 becomes significant. This makes it possible to clearly see the pattern (symbol 20) drawn by the multilayer thin film, and it can be easily distinguished from the imitation by the presence or absence of this change.
- FIG. 5 shows a manufacturing method in which a multilayer thin film 21 showing a color shift cut in a band shape is sandwiched between supports 30a and 30b separated into two layers, one of which has an opening.
- An example in which the identification medium 12 is obtained is shown.
- FIG. 6 is a completed view of the identification medium 12 produced by the manufacturing method of FIG. 5, in which the multilayer thin film 21 cut into a strip is partially cut from the opening formed in the support 30a. Shows the exposed state.
- the identification medium 12 manufactured in this manner is more difficult to remove from the target without impairing the function as the identification medium, as compared to a case where a small piece of a multilayer thin film is simply adhered by adhesion or bonding. High anti-counterfeiting effect.
- An adhesive may be added to the support 3 Ob of the obtained identification medium 12 so that a label on which the product number or the like can be printed may be used. Such a label can be used as a sticker having an identification function by attaching it to an arbitrary article
- FIG. 11 is a conceptual diagram showing an outline of an apparatus for manufacturing an identification medium.
- FIG. 12 is a perspective view showing a part of the apparatus shown in FIG. Figure 11 shows a container 101 containing slurry 102, which is a raw material for paper 105 serving as a support 30a, and a slurry 102, part of which is immersed in slurry.
- Drum 1 1 1 Guide roller 1 that applies pressure to fix paper material 1 1 6 12
- a paper material—a strip-shaped member 1 13 laminated with a single thin paper material of a multilayer thin film is shown.
- the multilayer thin film 107 is a member showing a color shift as shown in FIG.
- the drum 103 has a fine mesh material 114 on its surface. Also, a projection 115 is formed on a part of the surface of the drum 103. As the drum 103 rotates, the slurry adheres to the net material 114, and the paper is filtered.
- the drum 111 has a structure in which the protrusion 115 of the drum 103 is not formed. 'Note that the drawing shows a structure in which the protrusions 115 are formed in a row in the circumferential direction of the drum 103 for the sake of simplicity, but usually the drums 103, 1
- the width of 11 is greater than or equal to lm, and the protrusions 115 are arranged in a plurality of rows in the width direction.
- FIG. 13 is a perspective view showing an outline of the belt-shaped member 113. As shown in FIG. As shown in FIG. 13, the belt-shaped member 113 has a structure in which a multilayer thin film 107 is sandwiched between an upper paper member 105 and a lower paper member 116.
- openings (windows) 117 are periodically formed on a straight line.
- the opening 1 17 is formed in the projection 1 15 formed on the surface of the drum 103 because the paper is not filtered.
- the multilayer thin film 107 is narrower than the paper materials 105 and 116, and is positioned so as to be located in the opening 117.
- the strip-shaped member 113 has a structure in which the multilayer thin film 107 is exposed from the opening 117 and is visible from the outside. By cutting the strip-shaped member 1 1 3 to an appropriate width, And the identification medium 12 shown in FIG. 6 can be obtained.
- the width of the multilayer thin film 107 is wider or narrower than the width of the opening 117, or the structure of the same width.
- An identification medium 13 manufactured by being embedded in a support 30 is shown.
- Such an identification medium 13 can be obtained by placing the fiber 22 of the multilayer thin film at a predetermined position at the stage where the raw material liquid becomes viscous in the papermaking process, and further continuing the papermaking process.
- the fibers of the multilayer thin film are not exposed on the surface, but can be seen through the skin of the support 30, so that the color clearly changes according to the change of the viewing angle. Can be visually observed.
- the identification medium 13 in FIG. 7 can also be manufactured using the device shown in FIG. In this case, a thin multi-layered film 107 may be used, and the thickness of the paper material 105 or 116 may be adjusted to an appropriate thickness.
- FIG. 8 shows an identification medium 14 produced by cutting an identification piece 23 made of a multilayer thin film cut into small pieces into a support 30 made of paper.
- the manufacturing method is the same as that shown in FIG.
- a colored, preferably black print or foil transfer is performed on the object side of the flake-shaped multilayer thin film, the brightness is further increased and a good color shift can be observed.
- FIG. 14 is a cross-sectional view showing a cross-sectional structure of an identification medium having a structure including a multilayer thin film on both sides of a light absorption layer.
- the identification medium shown in FIG. 14 is provided with multilayer thin films 122, 123 showing a color shift on both sides of the light absorbing layer 122.
- layers 124, 125 to be embossed are formed on the outermost surfaces of the multilayer thin films 122, 123.
- a multilayer thin film 122, 123 is prepared.
- the multilayer thin films 122 and 123 are produced by laminating a plurality of films for causing a color shift and a film that can be easily embossed, and performing stretching and embossing.
- two multi-layer thin T / JP2003 / 011716 Adhere the film with an adhesive mixed with black pigment. By curing the adhesive, the light absorbing layer 121 is formed.
- the layer to be embossed may be laminated by a method such as spraying, coating, transferring, or printing after stretching the multi-layer thin film, and then embossing may be performed.
- the multilayer film may be directly embossed without providing a layer to be processed.
- the cross-sectional structure shown in FIG. 14 When the cross-sectional structure shown in FIG. 14 is obtained, it is finely cut to obtain an identification piece 23. Since the identification piece 23 has the same color shift on both sides, it can be used without regard to the front and back sides. Such a feature is useful when adopting a manufacturing method in which fine identification pieces 23 are dispersed and dispersed in the support 30.
- FIG. 15 is a perspective view showing an example of an object using the identification medium of the present invention.
- the object is, for example, a membership card.
- an object 13 1 such as a card is provided with a symbol 13 2 having an identification function.
- the pattern 13 2 is formed by randomly fixing a large number of identification pieces 23 whose cross-sectional structures are shown in FIG. 14 in a region having a predetermined shape.
- the identification piece 23 indicates a color shift, the pattern 13 2 appears to appear in accordance with the change in the viewing angle, whereby identification can be performed.
- FIG. 15 An example of a manufacturing method of the embodiment shown in FIG. 15 will be described.
- many identification pieces 23 whose cross-sectional structures are shown in FIG. 14 are prepared.
- an adhesive is applied or printed on the surface of the object 1 3 1 in the shape of the pattern 1 3 2, and the flake-shaped (piece-shaped) identification piece 2 3 made into a number of small pieces is applied to the object 1 3 1 Spray on the surface of 1.
- a large number of the scattered identification pieces 23 adhere to the part of the pattern 13 2 by the function of the adhesive.
- lightly press it with a roller or the like not shown, and apply to one surface of the identification piece 23, that is, the surface of the work layer 1 24 or 1 25 on which the embossing is applied in the structure shown in FIG.
- FIGS. 9 and 10 Conventional hologram sheet
- a hologram forming layer 41 is embossed
- a reflective layer 60 of aluminum or the like is provided on the embossed surface
- an adhesive material is provided on the object side.
- the layer 50 is provided with a protective layer 70 such as polyethylene terephthalate (PET) on the surface side.
- PET polyethylene terephthalate
- the multilayer thin film 24 is embossed 40 and the adhesive layer 50 is provided on the object side.
- the adhesive layer 50 is provided on the object side.
- a colored or preferably black pigment or dye may be mixed into the adhesive layer.
- the embossed surface 40 may be printed with color, preferably black.
- FIG. 16 is a cross-sectional view showing a process for producing a multilayer thin film film in which a hologram is formed by embossing.
- two types of light transmissive films having different refractive indices are alternately laminated in a multilayer and stretched to obtain a multilayer thin film 142 shown in FIG. 16 (A).
- a mold (not shown) for forming an embossed pattern constituting the hologram is pressed to obtain an embossed multilayer thin film 144.
- the figure shows a state in which all layers are deformed, the processing may affect some layers, and some layers may be deformed.
- the configuration is designed to pursue color shift characteristics, it may be difficult to form an embossed pattern.
- the processed shape may be deformed by the elasticity of the material, causing the intended embossed pattern to blur.
- the number of layers of the multilayer thin film must be multi-layered, such as several hundreds, but the layers may shift during embossing and the intended embossed pattern may not be formed. .
- FIG. 17 is a cross-sectional view showing a step of producing a multilayer thin film film that has been embossed.
- a laminated structure to be a starting layer of the multilayer thin film 144 is obtained, and a light-transmitting film 144 to be a layer to be processed for embossing is laminated thereon.
- a predetermined thickness To a predetermined thickness.
- a thermosetting resin such as an unsaturated polyester resin, an acrylic-modified urethane resin, or an epoxy-modified acrylic resin can be used.
- the light transmissive film 144 is embossed using a mold (not shown) for embossing to obtain a work layer 144 made of a light transmissive film having a hologram function. . Since the light-transmitting film 144 can be made of a material that can be easily embossed, the light-transmitting film 144 is mainly embossed to form a hologram (FIG. 17 (B)). As a manufacturing method, a multilayer thin film 144 is first obtained by stretching, a light-transmitting film 144 to be embossed by coating or the like is laminated, and then embossing is applied. You can also.
- the function of color shift is mainly performed by the multilayer thin film 142
- the function of hologram is mainly performed by the layer to be processed 144.
- the layer to be processed 145 a material that can be easily subjected to an embossing process can be selected, so that an intended hologram can be formed.
- reflection occurs due to the difference in the refractive index at the interface between the film of a material suitable for embossing and embossing and the multilayer film for causing color shift. Therefore, a film made of a material suitable for embossing or embossing can be a part of the multilayer thin film 146 that functionally exhibits color shift.
- the processed layer 144 on which the hologram is formed can be grasped as a part of the multilayer thin film 144 showing a color shift.
- reflection at the embossed surface in order to increase the refraction, (if example embodiment, Z n ST I_ ⁇ 2) different transparent thin film layer having a refractive index between the layer to be processed in contact with the layer to be processed by a method such as vapor deposition of May be.
- FIG. 18 is a cross-sectional view showing a fixed state of the identification medium to the object.
- FIG. 18 (A) shows a state in which a multi-layer thin film 1 46 including the workability 1 45 on which a hologram is formed is attached to the object 15 1 by the adhesive layer 15 2. I have. This aspect In the figure, the work layer 144 on which the hologram is formed is located on the uppermost surface.
- the adhesive layer 152 is obtained by curing an adhesive mixed with a colored, preferably black pigment, and functions as a light absorbing layer.
- the adhesive layer 15 2 is located in contact with the layer 14 5 on which the hologram is formed, and the adhesive layer 15 2 turns the multilayer thin film 1 4 6 into the object 1 5 1. Shows the fixed state.
- the processed layer 144 on which the hologram is formed may be present on the object side of the layer 144 showing the color shift.
- a layer to be processed on which a hologram is formed to be present in front of the light absorbing layer when viewed from the viewing side.
- FIG. 19 is a sectional view showing a sectional structure of another identification medium.
- the structure shown in FIG. 19 includes a processing layer 16 1 in which holograms are formed on both sides of a multilayer thin film 14 2 exhibiting a color shift.
- a multilayer thin film that changes color according to a change in viewing angle is fixed to a part of the surface of a support, and a film is formed on a portion of the support other than the film. Since the color printed is the same as the color seen from the predetermined direction, it cannot be easily forged, and the authenticity can be easily and reliably identified, and the manufacturing cost can be reduced. It has excellent effects, such as being able to use it, and is suitable as an identification medium for identifying packages packed with products, passports, cards, banknotes, vouchers, securities, certificates, gift certificates, paintings, tickets, public competition voting tickets, etc. ing.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2498737A CA2498737C (en) | 2002-09-13 | 2003-09-12 | Object identifying medium using multi-layer thin-film |
EP03795430A EP1543950A4 (en) | 2002-09-13 | 2003-09-12 | OBJECT IDENTIFICATION MEDIUM USING MULTILAYER THIN FILM |
JP2004535963A JP3969592B2 (ja) | 2002-09-13 | 2003-09-12 | 対象物の識別媒体 |
US10/527,446 US7590239B2 (en) | 2002-09-13 | 2003-09-12 | Object identifying medium using multi-layer thin-film |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-269163 | 2002-09-13 | ||
JP2002269163 | 2002-09-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004024439A1 true WO2004024439A1 (ja) | 2004-03-25 |
Family
ID=31986806
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/011716 WO2004024439A1 (ja) | 2002-09-13 | 2003-09-12 | 多層薄膜フィルムを用いた対象物の識別媒体 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7590239B2 (ja) |
EP (1) | EP1543950A4 (ja) |
JP (1) | JP3969592B2 (ja) |
CN (1) | CN100486805C (ja) |
CA (1) | CA2498737C (ja) |
WO (1) | WO2004024439A1 (ja) |
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WO2006068180A1 (ja) * | 2004-12-24 | 2006-06-29 | Nhk Spring Co., Ltd. | 識別媒体、識別媒体を備えた物品、識別方法および識別装置 |
JP2008139719A (ja) * | 2006-12-05 | 2008-06-19 | Dainippon Printing Co Ltd | ホログラムラベル |
JP2012035450A (ja) * | 2010-08-04 | 2012-02-23 | Toppan Printing Co Ltd | 画像表示体及びその製造方法、情報媒体、並びにブランク媒体 |
JP2012145678A (ja) * | 2011-01-11 | 2012-08-02 | Dainippon Printing Co Ltd | ホログラムシート、ホロラムラベル及びホログラム転写シート |
JP2012155027A (ja) * | 2011-01-24 | 2012-08-16 | Dainippon Printing Co Ltd | ホログラムシート、ホログラムラベル及びホログラム転写シート |
WO2015079652A1 (ja) * | 2013-11-26 | 2015-06-04 | 凸版印刷株式会社 | 表示体、および表示体の製造方法 |
JP2016117185A (ja) * | 2014-12-19 | 2016-06-30 | 凸版印刷株式会社 | 表示体、表示体付き物品および真贋判定方法 |
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AU2006202315B2 (en) * | 2005-06-17 | 2011-01-27 | Viavi Solutions Inc. | Covert security coating |
KR20100033704A (ko) * | 2008-09-22 | 2010-03-31 | 엘지전자 주식회사 | 미세패턴을 구비하는 스탬퍼 |
US20100206953A1 (en) * | 2009-02-19 | 2010-08-19 | O'boyle Lily | Durable washable label having a visible diffraction grating pattern |
US20110181928A1 (en) * | 2009-02-19 | 2011-07-28 | O'boyle Lily | Durable washable label having a visible diffraction grating pattern |
DE102009058243A1 (de) * | 2009-12-14 | 2011-06-16 | Giesecke & Devrient Gmbh | Dünnschichtelement mit Mehrschichtstruktur |
JP5964717B2 (ja) * | 2012-10-19 | 2016-08-03 | 日本発條株式会社 | 被覆部材 |
GB2531581B (en) * | 2014-10-23 | 2016-09-07 | De La Rue Int Ltd | Improvements in security papers and documents |
MDS20170076U2 (ro) * | 2014-12-01 | 2017-11-30 | Ирина МИРОЧНИК | Procedeu de autentificare a produselor de consum |
CN110622048B (zh) * | 2017-03-02 | 2023-03-28 | 3M创新有限公司 | 具有低光学厚度敏感性的动态反射彩色膜 |
AU2021260107A1 (en) * | 2020-04-23 | 2022-12-22 | Sicpa Holding Sa | Process for producing dichroic security features for securing value documents |
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Cited By (12)
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WO2006068180A1 (ja) * | 2004-12-24 | 2006-06-29 | Nhk Spring Co., Ltd. | 識別媒体、識別媒体を備えた物品、識別方法および識別装置 |
EP1833034A1 (en) * | 2004-12-24 | 2007-09-12 | Nhk Spring Co.Ltd. | Identification medium, article equipped with identification medium, identifying method and device |
JPWO2006068180A1 (ja) * | 2004-12-24 | 2008-06-12 | 日本発条株式会社 | 識別媒体、識別媒体を備えた物品、識別方法および識別装置 |
CN100550085C (zh) * | 2004-12-24 | 2009-10-14 | 日本发条株式会社 | 识别介质、具备识别介质的物品、识别方法和识别装置 |
EP1833034A4 (en) * | 2004-12-24 | 2011-06-29 | Nhk Spring Co Ltd | IDENTIFICATION MEDIUM, ARTICLE EQUIPPED WITH IDENTIFICATION MEDIUM, IDENTIFICATION METHOD AND DEVICE |
JP4778445B2 (ja) * | 2004-12-24 | 2011-09-21 | 日本発條株式会社 | 識別媒体、識別媒体を備えた物品および識別方法 |
JP2008139719A (ja) * | 2006-12-05 | 2008-06-19 | Dainippon Printing Co Ltd | ホログラムラベル |
JP2012035450A (ja) * | 2010-08-04 | 2012-02-23 | Toppan Printing Co Ltd | 画像表示体及びその製造方法、情報媒体、並びにブランク媒体 |
JP2012145678A (ja) * | 2011-01-11 | 2012-08-02 | Dainippon Printing Co Ltd | ホログラムシート、ホロラムラベル及びホログラム転写シート |
JP2012155027A (ja) * | 2011-01-24 | 2012-08-16 | Dainippon Printing Co Ltd | ホログラムシート、ホログラムラベル及びホログラム転写シート |
WO2015079652A1 (ja) * | 2013-11-26 | 2015-06-04 | 凸版印刷株式会社 | 表示体、および表示体の製造方法 |
JP2016117185A (ja) * | 2014-12-19 | 2016-06-30 | 凸版印刷株式会社 | 表示体、表示体付き物品および真贋判定方法 |
Also Published As
Publication number | Publication date |
---|---|
US7590239B2 (en) | 2009-09-15 |
US20060023879A1 (en) | 2006-02-02 |
EP1543950A1 (en) | 2005-06-22 |
CN1681647A (zh) | 2005-10-12 |
JPWO2004024439A1 (ja) | 2006-01-05 |
CA2498737C (en) | 2012-01-03 |
JP3969592B2 (ja) | 2007-09-05 |
CN100486805C (zh) | 2009-05-13 |
EP1543950A4 (en) | 2008-02-27 |
CA2498737A1 (en) | 2004-03-25 |
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