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WO2022114295A1 - Procédé de fabrication d'appareil destiné à empêcher la contrefaçon et la falsification - Google Patents

Procédé de fabrication d'appareil destiné à empêcher la contrefaçon et la falsification Download PDF

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Publication number
WO2022114295A1
WO2022114295A1 PCT/KR2020/017121 KR2020017121W WO2022114295A1 WO 2022114295 A1 WO2022114295 A1 WO 2022114295A1 KR 2020017121 W KR2020017121 W KR 2020017121W WO 2022114295 A1 WO2022114295 A1 WO 2022114295A1
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WO
WIPO (PCT)
Prior art keywords
particle
particles
manufacturing
counterfeiting
magnetic field
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2020/017121
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English (en)
Korean (ko)
Inventor
주재현
장보승
한승훈
박윤정
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanobrick Co Ltd
Original Assignee
Nanobrick Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanobrick Co Ltd filed Critical Nanobrick Co Ltd
Priority to PCT/KR2020/017121 priority Critical patent/WO2022114295A1/fr
Publication of WO2022114295A1 publication Critical patent/WO2022114295A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/369—Magnetised or magnetisable materials
    • 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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • 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
    • B42D25/40—Manufacture
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/09—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on magneto-optical elements, e.g. exhibiting Faraday effect
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
    • G02F1/1673—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by magnetophoresis
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/44—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids

Definitions

  • the present invention relates to a method for manufacturing an anti-counterfeiting and tampering prevention device, and more particularly, to a viewing angle or a light source using particles that are moved or rearranged by application of a magnetic field and particles whose optical properties change depending on the viewing angle. It relates to a method of manufacturing a device for preventing counterfeiting and tampering, including a security printing layer that implements a color change or three-dimensional effect according to a location.
  • a security medium using a magnetic color variable pigment is manufactured and utilized as a product having a structure suitable for each purpose such as security and genuine authentication by various security recognition means and combinations thereof.
  • these security media counterfeiting and tampering devices that can identify authenticity with the naked eye have excellent ease of use and are being used in various fields including security printing.
  • Such visual identification uses an overt function, and for this, a technique for generating a variable effect sufficient to visually recognize the variable effect is required.
  • the magnetic material and general pigment included in the color variable layer inserted between the substrates are configured to be localized in one direction by the specific gravity of the solvent and external force, so that external magnetic field, gravity, etc.
  • the color change effect is caused by factors.
  • various types of security information can be displayed, but it requires the application of an external magnetic field or the user must be aware of the prior information about the color change effect, and it is difficult to recognize because the color change is not clear. There is a problem that occurs when experiencing
  • the information transfer layer constituting the forgery prevention printout is any one or these of optically variable pigment (OVP), thermal ink, UV ink, fluorescent ink, or hologram. It is composed of a first variable layer formed by the combination of a magnetically color turnable photonic crystal ink (MTX) and a second variable layer formed of a magnetically color turnable photonic crystal ink (MTX), and in addition to the color change effect on the magnetic field by the magnetic color changeable material, various inks It is possible to realize the color variable effect by the combination of
  • OVP optically variable pigment
  • MTX magnetically color turnable photonic crystal ink
  • MTX magnetically color turnable photonic crystal ink
  • MTX magnetically color turnable photonic crystal ink
  • the present invention has been devised in view of the prior art as described above, and particles whose optical properties (color, spectrum of reflected light, reflectivity, transmittance, etc.) change depending on the viewing angle and particles that are moved or rearranged by the application of a magnetic field.
  • An object of the present invention is to provide a method of manufacturing an anti-counterfeiting and tampering device including a security printing layer that changes color or a specific pattern or implements a three-dimensional effect depending on the viewing angle or the position of the light source.
  • the manufacturing method of the anti-counterfeiting and tampering device of the present invention for solving the above problems is any one of the color of the reflected light, the spectrum of the reflected light, the intensity or the transmittance of the reflected light according to the viewing angle or the position of the light source or a dispersion step of preparing a dispersion by dispersing the first particles whose optical properties are changed and the second particles that are moved and reconfigured by the application of a magnetic field in a liquid medium to be photocured or thermally cured; a printing step of printing the dispersion on the surface of the substrate to form a security printing layer; Forming security information consisting of a specific color, pattern, reflected light spectrum or image by inducing movement or rotation of the first particle by moving or rotating the second particle by applying a magnetic field from the outside; By applying light or heat from the outside, the first particles and the second particles are reconfigured from an initial configuration to another arrangement, but the rearrangement is irreversible. and curing the array to form the security element layer.
  • the method of manufacturing an anti-counterfeiting and tampering device includes any one of a color of reflected light, a spectrum of reflected light, intensity of reflected light, or transmittance according to a viewing angle or location of a light source.
  • Dispersing step of preparing a dispersion by dispersing the first particles having the above optical properties and second particles that are reconfigured by moving by application of a magnetic field in a liquid medium includes, wherein the second particles are moved by the application of an external magnetic field, and the first particles are moved by the movement of the second particles, so that the first It is characterized in that the color, pattern or steric effect by the particles is reversibly changed and rearranged from the initial configuration of the first particle and the second particle to another arrangement.
  • the security element layer may be formed as a security element layer including a capsule by additionally including an encapsulation step of encapsulating the dispersion prepared through the dispersion step using a light-transmitting medium.
  • the first particle may be composed of a ferromagnetic material including at least one of Fe, Ni, and Co, and the ferromagnetic material may be magnetized through magnetization.
  • the second particles may be regularly arranged to express a photonic crystal phenomenon by application of an external magnetic field, so that the security element layer implements a photonic crystal optical effect.
  • the first particle is a flake-shaped particle, a particle whose color or reflected light changes depending on an angle on at least one side, a particle whose at least one side exhibits a mirror property, a particle whose at least one side exhibits a metallic luster property, Any one or more particles of particles having different colors on both sides may have a diameter of 1 to 50 ⁇ m.
  • the second particle and the first particle move complexly by the application of an external magnetic field, thereby increasing the optical properties and the second particle by the first particle. optical properties can be expressed together.
  • the second particle is a magnetic material
  • the second particle is a ferromagnetic particle, a superparamagnetic particle, a sphere-shaped particle, a flake-shaped particle, a particle that drives magnetophoretic by an external magnetic field, Any one or more of particles that are driven magnetically by an external magnetic field, and the diameter of the particles may be 10 nm to 10 ⁇ m.
  • the second particle may include at least one element of Fe, Ni, and Co.
  • the density of the second particles may be equal to or greater than the density of the first particles, and a density ratio of the first particles to the second particles may be 1.1 or more.
  • a light absorption layer may be additionally formed between the substrate and the security printing layer.
  • the second particles may be localized downward when a magnetic field is applied to form a light absorption layer.
  • the security information formed on the security element layer is a pattern or an image
  • the pattern or image may be any one or more of a one-dimensional or two-dimensional barcode, QR code, number, and character.
  • the security element layer may include any one or more of an optically variable pigment (OVP), a pearl, a light emitting pigment, a phosphorescent pigment, a cholesteric liquid crystal pigment, an ultraviolet reactive material, and an infrared reactive material.
  • OVP optically variable pigment
  • the forming of the security information may include arranging the first particles and the second particles in a specific direction.
  • the liquid medium may be a photocurable material, and the light irradiated from the outside may be light in the ultraviolet region.
  • the security information may be changed due to structural change in which the irreversibly hardened security element layer bends, contracts, or expands due to external pressure or bending or stretching.
  • the forming of the security element layer may include: a first step of fixing a position by applying light or heat in a state in which a magnetic field is applied from the outside; It may include a second step of additionally fixing the positions of the first particles and the second particles by applying light of a stronger intensity or heat of a higher temperature than the light or heat of the first step.
  • variable layer in which at least one of a color, a spectrum, and an intensity of reflected light is changed according to a viewing angle or a position of a light source may be additionally formed above or below the security element layer.
  • the forming of the security element layer may include curing a specific portion by applying a primary magnetic field; Applying a secondary magnetic field may include curing a portion other than the specific portion.
  • the anti-counterfeiting and tampering device may include a time-varying optical effect in which optical properties change depending on a viewing angle or the position of a light source irradiated from the outside, and a photonic crystal optical effect in which optical properties change according to an externally applied magnetic field.
  • the anti-counterfeiting and tampering device may be manufactured according to the manufacturing method of the anti-counterfeiting and tampering device.
  • the method for manufacturing an anti-counterfeiting and tampering device uses particles that are moved or rearranged by the application of a magnetic field and particles whose optical properties change depending on the viewing angle, so that a color variable or three-dimensional effect is realized. It can provide anti-counterfeiting and tampering protection.
  • FIG. 1 is a cross-sectional view showing the structure of an anti-counterfeiting and tampering prevention device according to the present invention.
  • FIG. 2 is a conceptual diagram schematically illustrating a method for manufacturing a counterfeit and tamper-proof device for irreversibly curing first and second particles by applying light or heat from the outside according to the present invention.
  • FIG. 3 is a conceptual diagram illustrating a process in which an optical characteristic of a first particle and a photonic crystal characteristic of a second particle are simultaneously expressed in the device for preventing forgery and tampering manufactured by the manufacturing method of FIG. 2 .
  • FIG. 4 is a photographic image of the anti-counterfeiting and tampering device manufactured by the manufacturing method of FIG. 2 , and is an image showing optical characteristics (a) without a light absorbing layer and optical characteristics (b) with black applied as a light absorbing layer to be.
  • FIG. 5 is an image showing a state in which optical characteristics of a first particle, which is a non-magnetic particle, appear due to movement of a photonic crystal particle, which is a second particle, according to the present invention.
  • FIG. 6 is a scanning electron microscopy (SEM) image of the printed cross-section of FIG. 5 , and is an image showing a state in which the first particles are inductively aligned.
  • SEM scanning electron microscopy
  • FIG. 7 is a schematic diagram showing an arrangement for applying a magnetic field according to the present invention.
  • Fig. 8 is an image of an anti-counterfeiting and tamper-evident device obtained using magnetic orientation according to Fig. 7(b).
  • FIG. 9 is a cross-sectional view illustrating a structure of an apparatus for preventing forgery and tampering according to another embodiment of the present invention.
  • FIG. 10 is an optical microscope image of the microcapsule manufactured through the manufacturing method of FIG. 9 .
  • 11 is a self-orientation image of a film on which microcapsules containing magnetisable variable flakes are printed.
  • the method for manufacturing an anti-counterfeiting and tampering device of the present invention is a first particle and magnetic field in which any one or more optical properties of the color of the reflected light, the spectrum of the reflected light, the intensity or transmittance of the reflected light are changed according to the viewing angle or the position of the light source.
  • the anti-counterfeiting and tampering prevention device manufactured by this manufacturing method has a structure as shown in FIG. 1 .
  • the first particles and the second particles are arranged in the security element layer to form an irregular or regular arrangement as in FIG.
  • a specific pattern or image may be formed to constitute security information.
  • This security information is intended to visually identify whether forgery or falsification by observing or observing the security element layer, and may be any one or more of a one-dimensional or two-dimensional barcode, QR code, number, or character, It can include all visually identifiable security information such as a specific company's logo, trademark, mark, and icon.
  • the first particles and the second particles regularly or irregularly arranged in the security element layer each have their own optical properties (color, reflectivity, reflection spectrum, etc.), which are patterns or images printed with ink on the substrate. will play the same role as
  • the first particle is a particle having a flake shape, at least one side of which changes color or reflected light depending on an angle, at least one side of a particle exhibiting a mirror property, and at least one side has a metallic luster property Any one or more of the particles shown and the particles having different colors on both sides may be applied, but it is preferable to use particles having a diameter of 1 ⁇ m to 50 ⁇ m in consideration of the realization of a visual effect.
  • the first particle implements an optical effect, and the shape of the particle is diversified to facilitate visual recognition through a color change or a three-dimensional effect.
  • a non-magnetic material is used as the first particle, only the second particle selectively reacts to an external magnetic field, thereby indirectly inducing the movement of the first particle to understand the movement of the second particle to realize a color-changing effect. or it may cause a change in security information depending on the viewing angle or the position of the light source.
  • a magnetic material or a magnetic material and a nonmagnetic material are laminated coated or a mixed material is used as the first particle, the first particle and the second particle are simultaneously reacted to the external magnetic field according to the external magnetic field.
  • the optical effect caused by particles may be complexly implemented, or the change of security information may be compounded depending on the viewing angle or the position of the light source.
  • an optical effect may be realized with only the first particle according to an external magnetic field, or security information according to the viewing angle or the position of the light source may cause changes in
  • the second particle is a magnetic material, and is a ferromagnetic particle, a superparamagnetic particle, a particle having a spherical shape, a particle having a plate shape, a particle having a magnetophoretic drive by an external magnetic field, and an external magnetic field.
  • Any one or more particles among the particles that are driven by magnetorheological by means of a magnetorheological method may be used, and those having a diameter of 10 nm to 10 ⁇ m may be used in consideration of the realization of the visual effect and the formation of photonic crystals.
  • Magnetic materials such as ferromagnetic particles, superparamagnetic particles, magnetophoretic particles, and magnetic fluid particles used as the second particles have photonic crystal properties according to the applicant's prior art (Registration Patent No. 10-1715058, Patent No. 10-1335719, etc.) Particles that can be displayed can be used, and not only spherical particles but also plate-shaped particles can be applied in consideration of visual effects.
  • the security element layer is an optically variable pigment (OVP), pearl, luminescent pigment, photoluminescent pigment, cholesteric liquid crystal pigment, ultraviolet absorbing or reflective material, infrared absorbing or reflective material, color change or transmittance according to temperature Any one or more of the change materials may be additionally included. Since it is possible to cause an optical effect in the form of a reaction by the wavelength of the incident light or the effect of changing the color of the pigment according to the incident light with the optical effect of the first and second particles through the addition of such an additional component, it is visually counterfeit And it is possible to improve the identification ability to easily check whether or not tampering.
  • OVP optically variable pigment
  • the first particle and the second particle may be dispersed in the security element layer, but separately, the first particle and the second particle may be dispersed and then the dispersion may be encapsulated using a light-transmitting medium.
  • a security element layer in which a capsule including a first particle and a second particle is included, as shown in FIG. 1( b ).
  • This encapsulation technology can be performed by a method known in the patents applied by the applicant (Patent Publication No. 10-2018-0018612, Patent Publication No. 10-2019-0022302, Registration Patent No. 10-1778198, etc.), and 3 ⁇ m or more It can also be used in the form of capsules having a size of 300 ⁇ m. Since the security element layer including the capsule induces a color change by forming an arrangement of the first particles and the second particles in the form of a unit cell, it is possible to implement a visual effect different from that of the security element layer in which the particles are dispersed.
  • the second particle may be positioned at the top of the security printing layer to maximize the optical property effect, and the specific gravity of the first particle to the specific gravity of the second particle
  • the relative value of may be 1.05 or more, preferably 1.05 to 8.0.
  • FIG. 2 schematically shows a method for manufacturing an anti-counterfeiting and tampering prevention device according to the present invention.
  • the first particles and the second particles exist in a regular or irregularly arranged state on the security printed layer printed on the surface of the substrate (initial state), and the first particles and the second particles are
  • the position or arrangement of the second particles reacting to the magnetic field is changed (step 1), and when irradiated with light such as ultraviolet rays in this state, the security printing layer is irreversibly cured, so the particles
  • the array becomes immobilized (step 2). Therefore, in order to perform particle arrangement and immobilization, steps 1 and 2 may be sequentially performed, but may also be performed almost simultaneously, which may vary depending on the type and combination of particles to be applied.
  • the printed security print layer can be formed in a specific pattern or image through this process.
  • the first particle is a non-magnetic material
  • the first particle is determined by movement of the first particle
  • the first particle includes a magnetic material
  • the position of the first particle is determined by the movement of the first particle and the movement of the second particle. Movement is determined by a complex action.
  • These specific patterns or images mainly refer to optical effects that can be obtained according to the rearrangement of particles such as color, three-dimensional effect, and luminous effect. It does not mean that the information itself is changed by the movement of particles.
  • color clarity may be low because optical properties of the first particles are affected by diffuse reflection of the printed substrate.
  • the movement of the second particle may not only serve as a simple information display function, but may also implement a light absorption layer function, thereby improving the optical properties of the first particle.
  • the second particles may have various colors, but most ideally, black particles may be used. When the degree of black increases, the optical properties of the first particles may be improved. In addition, there may be a difference in wavelength and sharpness according to the color of the second particle.
  • thermosetting resin when used together with the ultraviolet curable resin or a thermosetting resin is used alone, irreversible curing may occur even by heat.
  • the security element layer through irreversible curing
  • light of a specific wavelength or heat of a specific temperature is applied, but the position of the particles is fixed by applying light or heat from the outside (first step), and then
  • the curing process may be performed by dividing it into a step (second step) of additionally fixing by applying a higher intensity of light or heat of a higher temperature than in the first step.
  • irreversible hardening may be performed by applying a secondary magnetic field to harden a part other than the specific part.
  • the strength of the magnetic field
  • the wavelength can be changed, and curing can occur sequentially by using a corresponding liquid medium.
  • the particle arrangement in the manufactured security element layer is stably maintained for a long period of time, and the arrangement of the particles due to external energy is changed or deteriorated. It is also possible to configure regions with different particle arrangements so that the photonic crystal effect occurs differently.
  • the security element layer itself by additionally forming a variable layer in which the optical characteristics of at least one of the color of the reflected light, the spectrum of the reflected light, and the intensity of the reflected light are changed according to the viewing angle or the position of the light source on the upper or lower part of the security element layer
  • the optical effect of the variable layer may be added.
  • the anti-counterfeiting and tampering device to which such a variable layer is added can implement another optical effect, so it can be appropriately selected and applied according to the purpose.
  • optical effects such as color change, pattern change, three-dimensional effect, and light emitting effect are changed according to the viewing angle, so the user can change the viewing angle.
  • optical effects such as color change, pattern change, three-dimensional effect, and light emitting effect are changed according to the viewing angle, so the user can change the viewing angle.
  • visual effects such as color change, pattern change, three-dimensional effect, and light emitting effect may be displayed by pressing, stretching, or bending the security element printed on a specific substrate.
  • a plate-shaped particle that can be moved, rotated, or rearranged by application of a magnetic field is employed as the second particle, it is rearranged by the movement of the second particle and then in the security element layer in FIG. 3(a) ) to form an array as in
  • the optical effect as in Fig. 3(a) can be realized. is clearly expressed, so it is possible to recognize whether the printed information has been forged or altered.
  • optical effects such as color change, pattern change, three-dimensional effect, and light emitting effect may be implemented by pressing or bending the security element layer printed on a specific substrate.
  • the second particle and the first particle move, rotate, or By rearranging, it is possible to induce a complex color change, a three-dimensional effect, and a light emitting effect by the first and second particles according to a change in a viewing angle or a position of an external light source.
  • the first particle and the second particle react according to an external magnetic field
  • the first particle and the second particle are configured to exhibit different movement and rearrangement phenomena according to the external magnetic field, or optical properties (color, reflectivity, By contrasting the reflection spectrum, etc.), it is possible to recognize whether it is forged or tampered with by different visual effects by each particle.
  • a clear circular pattern shape is visually displayed depending on the viewing angle, so that counterfeiting or tampering of the product can be confirmed by recognizing the circular pattern. do.
  • the second particle particles constituting the photonic crystal through regular rearrangement according to the prior art may be applied.
  • the security element layer formed through this process is the same as that of FIG. 3(b).
  • a specific photonic crystal pattern is formed according to the application of an external magnetic field as well as a visual effect according to the viewing angle, and depending on the angle of the formed photonic crystal pattern Since the color-changing effect can be expressed at the same time, it is possible to simultaneously implement the optically variable angle optical effect and the photonic crystal optical effect, and it is possible to recognize whether forgery or modulation is caused by different visual effects by each particle.
  • the pattern at a specific viewing angle can be clearly recognized visually and is applied to a certain part of the circular pattern by the application of an external magnetic field. Since the formed photonic crystal pattern is variable, it is possible to recognize whether a product is forged or modulated through the simultaneous realization of the optically variable optical effect and the photonic crystal optical effect.
  • the plate-shaped particle has a color or reflected light that changes depending on the angle
  • at least one side of the particle shows a mirror property
  • at least one side of the particle shows a metallic luster property
  • both sides Particles having different colors can be applied, and as shown in FIG. 6 , by using the plate-shaped particles for the first particle, a color change or a three-dimensional effect can be obtained depending on the viewing angle.
  • the color change according to the viewing angle can be made more distinct by using particles that change the reflected light, mirror properties, or particles with metallic luster properties.
  • both sides of the particle have different colors, it is possible to cause a phenomenon in which the color changes when both sides of the particle are viewed from one side of the particle depending on the viewing angle.
  • the particles whose color or reflected light changes depending on the angle of the at least one surface the particles whose at least one surface exhibits mirror properties, the particles whose at least one surface exhibits metallic luster properties, and the particles whose both sides have different colors
  • spherical particles may be used as different optical properties of one surface and the other surface, it is preferable to use plate-shaped particles for the expression of optical properties.
  • the anti-counterfeiting and tampering prevention device can be manufactured, including the step of forming a security element layer by printing the capsule on a substrate.
  • the second particles move by the application of an external magnetic field, and the second particles move by the movement of the second particles.
  • the first particle moves, the color, pattern, or three-dimensional effect changes, and when the external magnetic field is removed, the first particle and the second particle return to a dispersed state, so the arrangement of the particles is changed from the initial arrangement. change reversibly between
  • the first particles and the second particles can use particles of various shapes, sizes, and specific gravity as described above, and OVP (optically variable pigment), pearl (pearl), luminescent pigment, photoluminescent pigment, cholesteric liquid crystal pigment, It may include any one or more additional components of an ultraviolet light emitting or absorbing material, an infrared light emitting or absorbing material, and the color, spectrum, and intensity of the reflected light, depending on the viewing angle or the position of the light source, on the upper or lower portion of the security element layer. Since the variable layer in which at least one optical characteristic is changed may be additionally formed, another type of optical effect may be realized.
  • the anti-counterfeiting and tampering prevention device in which the position of particles can be changed reversibly, the optical effect can be changed depending on whether an external magnetic field is applied, so that an anti-counterfeiting and tampering device for another purpose can be configured. Therefore, the anti-counterfeiting and tampering device according to the present invention is capable of displaying various security information according to an appropriate combination of the optically variable optical effect and the photonic crystal optical effect. do.
  • the security element layer when it is applied, it can be converted into digital data.
  • Information on variable colors, patterns, and three-dimensional effects is set in advance as a designated code, and information to be inserted is converted into binary code and pixelated information.
  • the data After generating the data, the data is coded through the conversion and output of the electromagnetic field signal according to the binary code, so that the security information of the anti-counterfeiting and tampering device can be checked.
  • a plurality of pixel areas are selected by scanning or photographing security information, the color of the pixel areas is converted into a binary code, and the binary code is identified and the corresponding data is displayed.
  • security information can be identified.
  • the security performance can be strengthened so that the security information can be displayed only at a specific angle during the scanning or photographing. Therefore, the scanning or photographing is performed through a camera, and the process of converting the pixel area into a binary code and displaying data again can be performed by a program or an application. Authenticity can be verified.
  • a coating composition for photocuring including the first particles whose optical properties change depending on the viewing angle or the position of the light source was prepared with the composition shown in Table 1.
  • magnetisable optically variable flakes of purple to dark blue having a magnetic property and having a D90 of about 20 ⁇ m were used.
  • the coating composition for photocuring described in Table 1 was applied to the substrate by silkscreen printing (300 mesh) to form a security printing layer, and the magnetically oriented optically variable flakes were exposed to a magnetic field of a specific pattern to self-orient security information consisting of images. was formed. After the self-oriented security print was completely cured by passing it through a UV curing machine of 330 mW/cm 2 conditions, the optical properties were evaluated. The results are shown in Table 2.
  • a coating composition for photocuring including a first particle whose optical properties are changed according to a viewing angle or a position of a light source and a second particle whose particles are rearranged when an external magnetic field is applied was prepared in the composition shown in Table 3.
  • first particles magnetisable optically variable flakes as in Example 1 were used, and as the second particles, spherical photonic crystal particles reflecting a visible light wavelength (480 to 650 nm) when a magnetic field was applied were used.
  • the coating composition for photocuring shown in Table 3 was applied to the substrate by silkscreen printing (300 mesh) to form a security printing layer, and exposed to a magnetic field of a specific pattern to self-orient the magnetizable optically variable flakes and also the photonic crystal particles Security information was formed by self-alignment. After the self-oriented security print was completely cured by passing it through a UV curing machine of 330 mW/cm 2 conditions, the optical properties were evaluated. The results are shown in Table 4.
  • the security print including the oriented first particles and the second particles was not easy to identify the light and dark, and it was not possible to confirm the three-dimensional effect of moving depending on the viewing angle or the position of the light source.
  • the reflectivity ratio of the bright zone and dark zone of the print was 1.01, showing similar results.
  • the coating composition for photocuring described in Table 5 was applied to the substrate by silkscreen printing (420 mesh), and the composition was completely cured by passing it through a UV curing machine of 330mW/cm2 condition.
  • the photocurable coating composition according to Tables 1 and 3 was applied to the substrate by silkscreen printing (300 mesh) and exposed to a magnetic field of a specific pattern to self-orient the magnetizable optically variable magnetic flakes.
  • the self-aligned coating composition was passed through a UV curing machine of 330 mW/cm 2 conditions to be completely cured, and then the optical properties were evaluated. The results are shown in Table 6.
  • the security print containing magnetizable optically variable flakes according to Table 1 printed and cured on top of the color layer was easier to identify the contrast compared to the result of Example 1, and the three-dimensional effect of moving depending on the viewing angle or the position of the light source was obtained. could check The reflectivity ratio of the bright zone and the dark zone of the printed material also showed an excellent contrast ratio of 4.06.
  • the security print including the first particle and the second particle was easier to identify the contrast compared to the result of Example 2, and it was possible to confirm the three-dimensional effect moving according to the viewing angle or the position of the light source.
  • the reflectivity ratio of the bright zone and the dark zone of the print also showed a contrast ratio of 2.77.
  • the pigment types of the photocurable color ink in Table 5 were changed to change the properties of the light absorption layer.
  • Color inks for photocuring in which black and blue pigments are dispersed, respectively, were applied to the substrate by silkscreen printing (420 mesh), and the composition was completely cured by passing it through a UV curing machine under the condition of 330mW/cm2.
  • the photocurable coating composition according to Table 3 was applied to the substrate by silkscreen printing (300 mesh) and exposed to a magnetic field of a specific pattern to self-align the magnetizable optically variable magnetic flakes.
  • the self-aligned coating composition was passed through a UV curing machine of 330 mW/cm 2 conditions to be completely cured, and then the optical properties were evaluated. The results are shown in Table 4.
  • a coating composition for photocuring including a first particle whose optical properties are changed according to a viewing angle or a position of a light source and a second particle whose particles are rearranged when an external magnetic field is applied was prepared in the composition shown in Table 8.
  • the non-magnetic optically variable flakes used various optically variable flakes having a D90 of about 50 ⁇ m as shown in Table 9 below, and the magnetically tunable photonic crystal material has a spherical shape that reflects visible light wavelengths (480 to 650 nm) when a magnetic field is applied. Photonic crystal particles were used.
  • the coating composition for photocuring according to Table 8 was applied to the substrate by silk screen printing (300 mesh), and the first particles and the second particles were magnetically exposed by exposure to a magnetic field of a specific pattern. oriented The self-aligned coating composition was passed through a UV curing machine of 330 mW/cm 2 conditions to be completely cured, and then the optical properties were evaluated. The results are shown in Table 10.
  • the security print containing the non-magnetizable optically variable flakes according to Table 10 was easy to identify the light and dark, and it was possible to confirm the three-dimensional effect of moving according to the viewing angle or the position of the light source.
  • the reflectivity ratio between the bright and dark zones of the print was about 1.3.
  • the CR ratio was low compared to the security print containing magnetizable optically variable flakes, it was confirmed that the optical properties such as three-dimensional effect were sufficiently disclosed.
  • the sizes of the non-magnetizable optically variable flakes are D90 45 and 150 ⁇ m, but preferably, the use of flakes of 25 ⁇ m or less allows for smooth alignment by the second particles, thereby improving the optical effect. effective for expression. This can also be confirmed from the fact that the variable effect of the pattern according to the angle of the security print is clearly identified as shown in FIGS. 5 and 8 .
  • the angle at which the flakes are arranged may vary depending on the location.
  • An optical effect according to such a viewing angle may be implemented.
  • the arrangement of these flakes may be changed in various forms according to the direction in which the magnetic field is applied at both ends of the printed layer as shown in FIG. 7 .
  • a coating composition for photocuring comprising a first particle whose optical properties are changed according to a viewing angle or a position of a light source and a second particle whose particles are rearranged when an external magnetic field is applied was prepared according to Table 11.
  • Optically variable flakes having a D90 of about 50 ⁇ m were used as the non-magnetizable optically variable flakes, and as the magnetizable nanoparticles, particles having a characteristic of particle arrangement and rotation when a magnetic field was applied were used.
  • the coating composition for photocuring according to Table 11 was applied to the substrate by silkscreen printing (300 mesh), and the magnetizable optically variable magnetic flake was magnetically exposed to a magnetic field of a specific pattern.
  • the self-oriented coating composition was passed through a UV curing machine under the condition of 330 mW/cm 2 and completely cured, and then the optical properties were evaluated. The results are shown in Table 12.
  • the security print including the non-magnetic optical variable flakes was easy to identify the light and dark, and it was possible to confirm the three-dimensional effect of moving depending on the viewing angle or the position of the light source.
  • the reflectivity ratio of the bright zone and the dark zone of the print was about 1.25.
  • Examples 1 to 6 show the results for the optical properties due to the first particle and the complex optical effect due to the arrangement or movement of the second particle when the magnetic field is applied.
  • the orientation of the first particles is induced by the movement, arrangement, and rotation of the second particles, thereby securing optical properties.
  • magnetic photonic crystal particles are used as the second particles, it is confirmed that new optical properties can appear by combining the optical properties of the first particles and the optical properties of the second particles. It was confirmed that it was a coating composition for security printing with high optical properties and improved optical properties.
  • An optically variable ink including first particles whose optical properties change depending on the viewing angle or the position of the light source was prepared with the composition shown in Table 13.
  • ingredient content (wt%) isoparaffin oil 85-95 High Molecular Weight Copolymer for Pigment Dispersion 1-3 First particle (magnetizable optically variable flake) 5-10
  • black to silver magnetisable optically variable flakes having a D90 of about 20 ⁇ m were used as the first particles.
  • magnetizable optically variable microcapsules were prepared through the encapsulation process, and the composition is shown in Table 14.
  • ingredient content gelatin 10-15 arabic gum 10-15 Optically variable ink comprising first particles 70-80
  • a film was manufactured using the capsule prepared with the composition according to Table 14, and its optical properties were evaluated, and the results are shown in Table 15.
  • the film may exhibit a color-changing effect by the applied magnetic field by forming micro-particles.
  • the microcapsules including the magnetisable variable flakes are printed on the film including the microparticles, magnetic orientation occurs by the application of a magnetic field as shown in FIG. 11, thereby realizing an optical effect.
  • An optically variable ink including a first particle whose optical properties are changed according to a viewing angle or a position of a light source and a second particle whose particles are rearranged when an external magnetic field is applied was prepared with the composition shown in Table 16.
  • ingredient content isoparaffin oil 60-80 Sorbitan Trioleate 0.1 ⁇ 1.0 High Molecular Weight Copolymer for Pigment Dispersion 0.5 ⁇ 2.0 First particle (magnetizable optically variable flake) 1 to 10 Second particle (self-color-tunable photonic crystal material) 10-20
  • first particles magnetisable optically variable flakes as in Example 1 were used, and as the second particles, spherical photonic crystal particles reflecting a visible light wavelength (480 to 650 nm) when a magnetic field was applied were used.
  • ingredient content gelatin 10-15 arabic gum 10-15 Optically variable ink comprising first and second particles 70-80
  • a film was prepared using the capsule prepared according to the composition of Table 17, and its optical properties were evaluated. The results are shown in Table 18.
  • An optically variable ink including first particles whose optical properties change according to a viewing angle or a position of a light source and second particles in which particles migrate when an external magnetic field is applied was prepared with the composition shown in Table 19.
  • ingredient Composition (wt%) isoparaffin oil 75-85 High Molecular Weight Copolymer for Pigment Dispersion 1-3 First particle (non-magnetizable optically variable flake) 10-20 Second particle (magnetic particle) 1 to 10
  • optically variable flakes having a D90 of about 40 ⁇ m were used as the non-magnetic optically variable flakes, and magnetic particles having a D90 of about 200 nm were used as the second particles.
  • ingredient content gelatin 10-15 arabic gum 10-15 Optically variable ink comprising first and second particles 70-80

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Abstract

La présente invention concerne un procédé de fabrication d'un appareil destiné à empêcher la contrefaçon et la falsification, qui comprend : une étape de dispersion consistant à fabriquer un liquide de dispersion par dispersion, dans un milieu liquide, de premières particules dont une ou plusieurs caractéristiques optiques parmi la couleur de la lumière réfléchie, le spectre de la lumière réfléchie et la résistance ou le degré de pénétration de la lumière réfléchie sont modifiées en fonction d'un angle de visualisation ou de la position d'une source de lumière, et de secondes particules qui sont déplacées ou reconfigurées par un champ magnétique appliqué à ces dernières ; une étape de fabrication de capsule consistant à encapsuler le liquide de dispersion à l'aide d'un milieu qui transmet de la lumière ; et une étape de formation d'une couche de dispositif de sécurité par impression de la capsule sur un substrat, les secondes particules se déplaçant au moyen de l'application d'un champ magnétique externe, et les premières particules se déplaçant au moyen du mouvement des secondes particules, de telle sorte que la couleur, le motif ou l'effet stérique par les premières particules est changé de façon réversible, et les premières particules et les secondes particules sont reconfigurées de leur configuration initiale à une autre configuration.
PCT/KR2020/017121 2020-11-27 2020-11-27 Procédé de fabrication d'appareil destiné à empêcher la contrefaçon et la falsification Ceased WO2022114295A1 (fr)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090066076A1 (en) * 2002-04-19 2009-03-12 Giesecke & Devrient Gmbh Security document
CN101903183A (zh) * 2007-12-11 2010-12-01 德国捷德有限公司 光学可变安全元件
KR101170585B1 (ko) * 2004-12-09 2012-08-01 시크파 홀딩 에스에이 보는 각도에 의존한 문양을 갖는 위변조 방지 요소, 위변조 방지 요소의 제조 방법 및 위변조 방지 요소를 포함하는 제품
KR20150074647A (ko) * 2013-12-24 2015-07-02 한국조폐공사 위변조 방지기능을 가지는 ２차원 바코드 및 그 제조방법
KR20170062372A (ko) * 2015-11-27 2017-06-07 주식회사 나노브릭 정품인증을 위한 표시장치 및 이의 사용방법.
KR102187266B1 (ko) * 2019-09-19 2020-12-04 주식회사 나노브릭 위조 및 변조 방지 장치의 제조방법.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090066076A1 (en) * 2002-04-19 2009-03-12 Giesecke & Devrient Gmbh Security document
KR101170585B1 (ko) * 2004-12-09 2012-08-01 시크파 홀딩 에스에이 보는 각도에 의존한 문양을 갖는 위변조 방지 요소, 위변조 방지 요소의 제조 방법 및 위변조 방지 요소를 포함하는 제품
CN101903183A (zh) * 2007-12-11 2010-12-01 德国捷德有限公司 光学可变安全元件
KR20150074647A (ko) * 2013-12-24 2015-07-02 한국조폐공사 위변조 방지기능을 가지는 ２차원 바코드 및 그 제조방법
KR20170062372A (ko) * 2015-11-27 2017-06-07 주식회사 나노브릭 정품인증을 위한 표시장치 및 이의 사용방법.
KR102187266B1 (ko) * 2019-09-19 2020-12-04 주식회사 나노브릭 위조 및 변조 방지 장치의 제조방법.

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