CN111105700A - Color-changing anti-counterfeit label - Google Patents

Color-changing anti-counterfeit label Download PDF

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Publication number
CN111105700A
CN111105700A CN202010030194.5A CN202010030194A CN111105700A CN 111105700 A CN111105700 A CN 111105700A CN 202010030194 A CN202010030194 A CN 202010030194A CN 111105700 A CN111105700 A CN 111105700A
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CN
China
Prior art keywords
counterfeiting
color
layer
particles
changing
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CN202010030194.5A
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Chinese (zh)
Inventor
袁涌耀
吴光乐
胡耀清
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Hangzhou Wopuwulian Science & Technology Co ltd
Hangzhou Wopu IoT Technology Co Ltd
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Hangzhou Wopuwulian Science & Technology Co ltd
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Priority to CN202010030194.5A priority Critical patent/CN111105700A/en
Publication of CN111105700A publication Critical patent/CN111105700A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02Forms or constructions
    • G09F3/0291Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
    • G09F3/0294Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time where the change is not permanent, e.g. labels only readable under a special light, temperature indicating labels and the like

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Credit Cards Or The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention relates to the technical field of anti-counterfeiting, in particular to a color-changing anti-counterfeiting label. The invention aims to provide a color-changing anti-counterfeiting label, which comprises: the anti-counterfeiting device comprises a base material, wherein an anti-counterfeiting area is set on the base material; the temperature change ink layer is positioned on the anti-counterfeiting area; the random anti-counterfeiting particles are positioned on the temperature-changing ink layer; the color of the temperature-variable ink layer is different from that of the base material, and the color of the random anti-counterfeiting particles after being overlapped with the base material and the temperature-variable ink layer is different. The color-changing anti-counterfeiting label is damaged under the heating condition, is prevented from being taken off for secondary utilization, has a three-dimensional characteristic, and enhances the anti-counterfeiting performance of the color-changing anti-counterfeiting label.

Description

Color-changing anti-counterfeit label
Technical Field
The invention relates to the technical field of anti-counterfeiting, in particular to a color-changing anti-counterfeiting label.
Background
With the development of national economy and technology, the anti-counterfeiting technology has gradually changed from the use occasions of passports, certificates, currencies, tickets and securities made by traditional departments of banks, customs, tax administration, finance, public security and the like to civilian use, and has wide application potential in the fields of cigarettes, wines, foods, medicines, health products, cosmetics, clothes, optical disks, pesticides, chemical fertilizers, automobile parts, daily necessities and the like. The anti-fake label is a cross-disciplinary technology in optical, chemical, physical, electromagnetic, computer, spectral, digital printing, packing and other fields. The anti-counterfeiting technology is various, such as laser holography technology, watermarking technology, code technology, digital coding, bar codes, two-dimensional codes, RFID and the like. The existing anti-counterfeit label is softened by the gum at the bottom of the label under the heating condition, so that the anti-counterfeit label is torn off, no gum trace is left, the anti-disassembly function is not realized, and the authenticity of a product cannot be guaranteed. Therefore, to achieve the anti-counterfeit purpose, the anti-counterfeit label must have the characteristics of non-duplicability, non-reusability and non-removability.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the color-changing anti-counterfeiting label, which is damaged and cannot be identified when the temperature changes, is prevented from being taken off for secondary use, has a three-dimensional characteristic and enhances the anti-counterfeiting performance of the color-changing anti-counterfeiting label.
The purpose of the invention is realized by adopting the following technical scheme:
the invention provides a color-changing anti-counterfeit label, which comprises: the anti-counterfeiting printing plate comprises a base material, wherein an anti-counterfeiting area is set on the base material; the temperature change ink layer is positioned on the anti-counterfeiting area; the random anti-counterfeiting particles are positioned on the temperature-change ink layer; the color of the temperature-variable ink layer is different from that of the base material, and the color of the random anti-counterfeiting particles is different from that of the base material and the temperature-variable ink layer after the random anti-counterfeiting particles are superposed.
In a specific embodiment, the anti-counterfeiting ink further comprises a bonding layer, wherein the bonding layer is positioned on the temperature-change ink layer, the random anti-counterfeiting particles are randomly embedded on the bonding layer, and the bonding layer is a transparent coating.
In a specific embodiment, a second coating layer is arranged between the substrate and the temperature-change ink layer, the colors of the random anti-counterfeiting particles and the substrate after the random anti-counterfeiting particles are superposed with the second coating layer and the temperature-change ink layer are different, and the colors of the temperature-change ink layer after the random anti-counterfeiting particles and the substrate after the random anti-counterfeiting particles are superposed with the second coating layer and the second coating layer are different.
In a specific embodiment, a transparent coating layer covers the random anti-counterfeiting particles.
In one embodiment, the coating layer is one of a polyethylene terephthalate layer, an orthophenylphenol layer, and a thermoplastic polyurethane elastomer layer.
In a specific embodiment, the substrate is one of coated paper, fragile paper, synthetic paper, polyethylene terephthalate.
In a specific embodiment, the random anti-counterfeiting particle material is one of polyethylene terephthalate, polyvinyl chloride and o-phenylphenol; the shape of the random anti-counterfeiting particles is one or a combination of more than two of round, triangular, trapezoidal, square, linear, hexagonal, rhombic and irregular shapes.
In one embodiment, the random anti-counterfeiting particles are laser particles.
In one embodiment, the substrate further comprises a barcode region, and the barcode region is not overlapped with the anti-counterfeiting region.
In one embodiment, the substrate further comprises logo and/or fixed information printed by temperature-change ink.
Compared with the prior art, the invention has the beneficial effects that:
in the color-changing anti-counterfeiting label, after the temperature-changing ink layer senses the temperature change, the color of the temperature-changing ink layer changes along with the temperature change, is similar to or the same as the color of the base material or the color of the random anti-counterfeiting particles, is difficult to distinguish, and the label is damaged and can not be identified, so that the label is prevented from being taken off for secondary use; and random anti-counterfeiting particles are fixed on the temperature-variable ink layer, and the random anti-counterfeiting particles on the temperature-variable ink layer have three-dimensional characteristics, so that the anti-counterfeiting performance of the anti-counterfeiting label is enhanced.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the figure: 1. a substrate; 2. a second coating layer; 3. a temperature-sensitive ink layer; 4. a bonding layer; 5. a film coating layer; 6. random anti-counterfeiting particles.
Detailed Description
The present invention will now be described in more detail with reference to the accompanying drawings, in which the description of the invention is given by way of illustration and not of limitation. The various embodiments may be combined with each other to form other embodiments not shown in the following description.
In a specific embodiment, referring to fig. 1, the anti-counterfeit label further includes a substrate 1, a temperature-changing ink layer 3, and random anti-counterfeit particles 6. The anti-counterfeiting area is set on the base material and is used for being distinguished from other areas of the base material; the temperature-change ink layer 3 is positioned on the anti-counterfeiting area, and the temperature-change ink layer can be a pure color area, such as black, red, dark blue and other dark color systems. The colour on temperature change printing ink layer should distinguish with the anti-fake district colour of substrate to in discernment, temperature change printing ink layer experience temperature change back, can produce and discolour, make temperature change printing ink layer colour close with the colour of substrate, perhaps the colour on temperature change printing ink layer is close with the colour of random anti-fake granule, is difficult to distinguish, leads to the label to receive the damage, unable discernment. That is to say, after the color-changing anti-counterfeit label is heated or cooled, the information of the printed temperature-changing ink layer can change visually with the continuous temperature change, for example, the color of the temperature-changing ink layer changes to another color (for example, the color is the same as the color of the base material or the color is the same as the color of the random anti-counterfeit particles) or the color becomes lighter or darker (for example, the color is similar to the color of the base material or the color is similar to the color of the random anti-counterfeit particles) or the color gradually disappears or is incomplete, so that the boundary of the anti-counterfeit area is difficult to distinguish, or the color of the temperature-changing ink layer. Random anti-counterfeiting particles are fixed on the temperature-variable ink layer, the colors of the random anti-counterfeiting particles after the random anti-counterfeiting particles are overlapped with the anti-counterfeiting area and the temperature-variable ink layer are different, the random anti-counterfeiting particles on the temperature-variable ink layer have completely random characteristics, a random anti-counterfeiting pattern is formed, the three-dimensional characteristic is realized, and the anti-counterfeiting performance of the anti-counterfeiting label is enhanced.
Specifically, the temperature change ink layer can be made of metal salt temperature change ink containing crystal water, spiro compound temperature change ink, bisanthrenone benzene series temperature change ink, temperature sensitive crystal variation temperature change ink and the like, and the color of the temperature change ink layer is changed visually after the temperature change is sensed, so that the boundary of the anti-counterfeiting area is difficult to distinguish, or the color of the temperature change ink layer is close to that of the base material, or the laser area is difficult to distinguish, and the label is damaged and cannot be identified. Alternatively, the temperature change ink may have a temperature change range of 30 ℃ to 105 ℃. The random anti-counterfeiting particles can be laser particles with laser characteristics and have four-dimensional photosensitive characteristics.
It should be understood that, in the color-changing anti-counterfeit label of the present invention, the shape of the anti-counterfeit region may be regular or irregular shapes such as square, triangle, circle, etc., as long as the anti-counterfeit identification effect is satisfied, and the present invention is not limited thereto.
In a specific embodiment, the color-changing anti-counterfeit label further comprises a bonding layer, the bonding layer 4 is located on the temperature-changing ink layer 3, random anti-counterfeit particles are randomly embedded on the bonding layer, the bonding layer 4 is used for fixing the random anti-counterfeit particles 6 in an anti-counterfeit area, the temperature-changing ink layer 3 is different from the anti-counterfeit area in color, the random anti-counterfeit particles are different from the color of the anti-counterfeit area after being overlapped with the temperature-changing ink layer 3, the bonding layer is transparent, and the color of the anti-counterfeit area after being overlapped with the temperature-changing ink layer 3 is. In the color-changing anti-counterfeiting label, the temperature-changing ink layer is damaged under the heated condition, so that the label is prevented from being taken off for secondary use, and the color-changing anti-counterfeiting label has a three-dimensional characteristic, shows a four-dimensional photosensitive characteristic and enhances the anti-counterfeiting performance of the color-changing anti-counterfeiting label. It should be understood that the color of the security region may be the same as or different from the color of other regions of the substrate other than the security region.
It should be understood that the security region can be the entire area of the substrate or one of the areas of the substrate, and the color of the security region can be the same as or different from the color of the substrate, and the form of the security region is not limited in the present invention. If the anti-counterfeiting area is an area of the base material, the color of the anti-counterfeiting area of the label formed by overlapping the base material, the ink layer, the bonding layer and the random anti-counterfeiting particles is distinguished from other areas of the base material, namely the color of the anti-counterfeiting area of the label is different from the color of other areas of the base material, so that the label is convenient to identify; or a wire frame boundary or other boundaries in various forms are arranged between the anti-counterfeiting area of the label and other areas of the base material, the color of the boundary is different from the color of the base material and the anti-counterfeiting area, and the form of the boundary is not limited, and only other areas need to be distinguished.
In one embodiment, the color of the temperature-change ink layer 3 is a dark color system, such as black, date red, wine red, dark blue, etc., the color of the temperature-change ink layer is different from that of the substrate, and the color of the random anti-counterfeiting particles is different from that of the anti-counterfeiting area and the temperature-change ink layer after being overlapped.
Random anti-counterfeiting particles 6 are randomly embedded on the bonding layer 4, the random anti-counterfeiting particles 6 can be randomly scattered in anti-counterfeiting areas in various different shapes, or the random anti-counterfeiting particles 6 in the same shape are randomly scattered in the anti-counterfeiting areas, and the random anti-counterfeiting particles scattered in various different shapes are embedded on the bonding layer 4, so that the label has uniqueness and three-dimensional characteristics. In other embodiments, at least three shapes of random security particles are randomly interspersed on the adhesive layer. It should be understood that the more the shape of the random anti-counterfeiting particles, the more complex the random pattern of the formed anti-counterfeiting label, and the better the anti-counterfeiting effect.
On this anti-fake label discolours, random anti-fake granule adhesion and inlay on the tie coat in anti-fake district, and random anti-fake granule is not overlapped, and wherein random anti-fake granule on the tie coat has completely random characteristic, forms random anti-fake pattern and has three-dimensional stereo feature to present four-dimensional sensitization characteristic, strengthened anti-fake label's antifalsification performance.
In one embodiment, the substrate is one of coated paper, fragile paper, synthetic paper, polyethylene terephthalate (PET), and the like. The bonding layer can be a glue layer, an oil layer, an adhesive layer, a UV glue layer, a gloss oil layer and the like, and UV glue with a curing speed block is preferred. The laser particle material is one of polyethylene terephthalate, polyvinyl chloride and o-phenylphenol with laser characteristics.
In a specific embodiment, the antifalsification label that discolours includes substrate 1, the anti-fake district of setting for on the substrate, temperature change printing ink layer 3, tie coat 4, inlay random anti-fake granule 6 on tie coat 4, anti-fake granule is different with the colour after temperature change printing ink and the stack of anti-fake district, the colour of control by temperature change printing ink is different with the colour of substrate, make the printing ink layer and the other region of substrate between have the boundary, be convenient for discern, and tie coat 4 is transparent in order to expose the colour of temperature change printing ink layer 3, the substrate can be the arbitrary colour different with temperature change printing ink layer colour, and the colour of random anti-fake granule is different with the colour after anti-fake district and the stack of.
In a specific embodiment, the substrate further comprises a fixed anti-counterfeiting structure such as a logo and/or fixed information, which is printed by a temperature-changing ink layer to form a figure or a character or a combination of the figure and the character. After the color-changing anti-counterfeiting label is heated at 50 ℃ or above 50 ℃, the information printed by the temperature-changing ink can change in color along with continuous heating, and the color of the information is similar to or the same as that of the base material or the random anti-counterfeiting particles, so that the information is difficult to distinguish; the color change of the fixed logo, the fixed information and the anti-counterfeiting area pure color area can be observed by naked eyes, the anti-counterfeiting area pure color area can be verified by scanning the anti-counterfeiting area, if the anti-counterfeiting area pure color area cannot be scanned, the change can prevent the situation that the label is taken off for secondary use by heating from occurring.
In a specific embodiment, the color-changing anti-counterfeit label comprises a substrate 1, a set anti-counterfeit area on the substrate 1, a temperature-changing ink layer 3, a bonding layer 4, random anti-counterfeit particles 6 embedded on the bonding layer 4, the temperature-changing ink layer 3 between the bonding layer 4 and the anti-counterfeit area, and a second coating layer 2 between the substrate and the temperature-changing ink layer 3, wherein the second coating layer 2 is used for enhancing the adhesive force of the temperature-changing ink layer on the substrate and preventing the temperature-changing ink layer from scattering on the substrate. The second coating layer 2 may be a glue layer, an oil layer, a tack coat layer, a UV glue layer, or a gloss oil layer. The laser particles are different from the second coating, the anti-counterfeiting area and the temperature change ink layer in color after being superposed, and the temperature change ink layer is different from the base material and the second coating in color after being superposed. Optionally, the second coating 2 is a clear coating. In other embodiments, the second coating layer can be other colors, and when the second coating layer is other colors, the color of the temperature-change ink layer is different from the color of the anti-counterfeiting area and the color of the second coating layer after the second coating layer is superposed.
In one embodiment, the color-changing anti-counterfeiting label comprises a substrate 1, an anti-counterfeiting area is arranged on the substrate, a second coating layer 2 is coated on the anti-counterfeiting area, a temperature-changing ink layer 3 is printed on the second coating layer 2, a bonding layer 4 is coated on the temperature-changing ink layer 3, random laser particles 6 are embedded on the bonding layer 4, a film coating layer 5 connected with the substrate, the bonding layer and the random laser particles is arranged above the random laser particles 6 and the bonding layer 4, the film coating layer 5 covers the random laser particles and is bonded with the substrate 1, the bonding layer 4 and the random laser particles, the position of the random laser particles is further stabilized, the random laser particles are protected from scattering, the label is protected, and the label is scratch-resistant and waterproof. In one embodiment, the coating layer is one of a polyethylene terephthalate (PET) layer, an ortho-phenylphenol (OPP) layer and a thermoplastic polyurethane elastomer (TPU) layer, and preferably, the coating layer is a TPU film which is an environment-friendly material and has high tensile, tough and aging-resistant properties.
In a specific embodiment, the random anti-counterfeit particles are laser particles with laser characteristics on the surface, and the shape of the random laser particles is one or a combination of more than two of regular or irregular shapes such as circles, triangles, trapezoids, squares, lines, hexagons, diamonds and the like, that is, the shape of the laser particles can be any shape, so that the anti-counterfeit performance of the anti-counterfeit label is enhanced. In one embodiment, the laser particles have at least three shapes, and are 1-5 cm in length2Within the range, the number of the laser particles is more than or equal to 35 and less than or equal to 120, and the laser particles are uniformly distributed in the anti-counterfeiting area.
In one embodiment, the surface of the laser particles has laser characteristics, the shape of the laser particles is one or a combination of two or more of regular or irregular shapes such as circles, triangles, trapezoids, squares, lines, hexagons, diamonds and the like, and optionally, the shapes of the laser particles are at least three and are uniformly distributed in the anti-counterfeiting area to form random pictures and texts. Optionally, the laser particles are self-adhesive substrates with laser characteristics on the surfaces, and the self-adhesive substrates are made of materials such as PET.
According to the color-changing anti-counterfeiting label, the base material is coated with the temperature-changing ink layer and the bonding layer, the random laser particles are sprayed on the bonding layer, the bonding layer is solidified, the random laser particles are embedded on the bonding layer after the bonding layer is solidified, and the complete randomness of the random laser particles causes the label graph to be novel, complex, random and three-dimensional, and has the four-dimensional characteristic of laser, so that the anti-counterfeiting effect is enhanced; in addition, the label also has the advantages of low cost and simple process; the label with any size can be easily made, and the label can be used for the anti-counterfeiting protection of the key position of a target object and can also be used for the anti-counterfeiting of the package, so the label has wide potential application in the anti-counterfeiting technical field. The temperature change ink layer is heated at 50 ℃ or above 50 ℃, information printed by the temperature change ink changes along with continuous heating, and the color of the information is similar to or the same as that of the base material or the random anti-counterfeiting particles, so that the information is difficult to distinguish; the change of the isothermal ink-changing layer of the load fixing logo, the fixing information and the anti-counterfeiting area black block can be observed through naked eyes, the anti-counterfeiting area black block can be verified through scanning the anti-counterfeiting area, and the change can prevent the situation that the label is taken off for secondary use through heating.
In a specific embodiment, the scanning and identifying of the color-changing anti-counterfeit label further includes a bar code area, the bar code area is a one-dimensional code or a two-dimensional code directly printed on the substrate by a printing process or other graphic identification codes capable of storing information and being identified by the terminal SDK, the bar code area and the anti-counterfeit area are not overlapped in anti-counterfeit, that is, the bar code area is located outside the range of the anti-counterfeit area. Extracting the characteristics of the position, shape, direction, space, height, color, light and dark powder blocks, areas and the like of the anti-counterfeiting area through rapid imaging equipment and a graphic algorithm, and storing the characteristics to a cloud end; when a consumer scans a code, the image captured by the mobile phone camera is uploaded to the cloud through video and code scanning of the identification program, and the characteristics are compared through a cloud AI algorithm. In a specific embodiment, the bar code area and the ink area are printed simultaneously, after the second coating is coated on the substrate, the ink layer is printed on the second coating by means of digital printing, carbon ribbon printing and code spraying, and the ink layer can be a two-dimensional code or a bar code.
In one embodiment, the substrate further comprises logo and/or fixed information printed by temperature change ink. Alternatively, a logo, fixed information, etc. on the substrate may be disposed around the barcode region. The color change of the fixed logo, the fixed information and the anti-counterfeiting area pure color area can be observed by naked eyes, the anti-counterfeiting area pure color area can be verified by scanning the anti-counterfeiting area, if the anti-counterfeiting area pure color area cannot be scanned, the change can prevent the label from being taken off by heating for secondary utilization.
The manufacturing process of the color-changing anti-counterfeiting label can be digital printing, silk-screen printing or powder spraying. The color-changing anti-counterfeiting label is specifically manufactured as follows:
according to the first manufacturing method of the color-changing anti-counterfeiting label, the manufacturing method of the color-changing anti-counterfeiting label comprises the following steps: setting an anti-counterfeiting area on a base material, wherein the base material can be coated paper, fragile paper, synthetic paper, polyethylene terephthalate (PET) and the like; coating a transparent second coating on the anti-counterfeiting area through a rubber roll, better attaching the temperature change ink layer to the base material, and coating the temperature change ink layer loaded with information on the second coating; and coating a bonding layer on the temperature change ink layer, wherein the bonding layer can be water glue, oil glue, non-setting adhesive, UV glue, gloss oil and the like, and preferably UV glue with high curing speed. The thickness of the bonding layer can be adjusted by adjusting the number of lines of the rubber roller, optionally, the number of lines of the rubber roller is 300-500 lines, and the thickness of the bonding layer can be 0.01-1 mm. The adhesive layer covers 85% -90% of the anti-counterfeiting area and is uniformly distributed, so that the adhesive layer is prevented from overflowing the anti-counterfeiting area. A funnel filled with laser particles is used above the base material, wherein the laser particles are unlimited in shape and 0.1-5 mm in size, and the laser particles are made of one of polyethylene terephthalate, polyvinyl chloride and o-phenylphenol. The bottom of funnel is equipped with the otter board that punches a hole that has evenly distributed round hole and sprays laser particles to the substrate surface through vibrating the funnel, and wherein partial laser particles contact and the adhesion on the tie coat in anti-fake district with the tie coat, and remaining laser particles scatter outside anti-fake district, and through the flow of the vibration frequency adjustment laser particles of adjustment funnel, it is not range upon range of to ensure laser particles, after spraying laser particles on the tie coat, through air-blast device and updraft ventilator, get rid of the laser particles that float outside the anti-fake district. The air blower is arranged on one side, the air outlet is about 10cm away from the label, the air pressure is 0.4-0.8MPa, the air suction opening of the air suction device is 2-4cm away from the label surface, and the area is about 400cm2The fan speed is 800-. The above parameters can be adjusted according to specific conditions, as long as the floating laser particles outside the anti-counterfeiting area can be removed, and the laser particles in the anti-counterfeiting area are retained, which is not limited in the invention. Curing the adhesive layer by thermal curing or ultraviolet curing, wherein the adhesive layer is used forAnd fixing the laser particles in the anti-counterfeiting area. In the embodiment, the anti-counterfeiting area is set on the surface of the base material, the temperature change ink layer is coated with the bonding layer, so that the sprayed laser particles can be uniformly adhered and embedded on the bonding layer of the anti-counterfeiting area, and the random laser particles are not overlapped to form a random anti-counterfeiting pattern, wherein the laser particles on the bonding layer have completely random characteristics, the formed anti-counterfeiting label has three-dimensional characteristics and four-dimensional photosensitive characteristics, and the anti-counterfeiting performance of the anti-counterfeiting label is enhanced; and the temperature-changing ink layer is damaged after being heated, so that the color-changing anti-counterfeiting label is prevented from being taken off for secondary use.
According to the second manufacturing method of the color-changing anti-counterfeiting label, the base material is placed on a printing production line under the environment of 25 ℃ plus or minus 5 and 50% RH plus or minus 10 humidity, the moving speed of the production line is 50 m/min-80 m/min, the printing speed is low when the moving speed is lower than the speed range, the quality of a printed product is poor when the moving speed is higher than the speed range, the ink is not sufficiently adhered on the base material, and the yield is reduced. Coating a transparent second coating on a substrate containing an anti-counterfeiting area, wherein the thickness of the second coating can be adjusted by adjusting the number of rubber covered rollers, optionally, 300-500 rubber covered rollers are used for coating to ensure the proper thickness of the coating, and then the second coating is cured in a heat curing mode through a drying tunnel of 30-50 m, wherein the heat curing temperature is 80-130 ℃, or the second coating is cured in an ultraviolet curing mode, the ultraviolet curing wavelength is 200-400 nm, and the curing time is 2-3S. Printing black ink on the second coating, wherein the black ink comprises a bar code area and an anti-counterfeiting area, and the anti-counterfeiting area and the bar code area are printed simultaneously, and the temperature change ink is printed in the anti-counterfeiting area and is printed in a silk screen printing mode to form a temperature change ink layer; the bar code area can be printed by silk screen printing, digital printing, carbon ribbon printing or code spraying. It should be understood that the second coating layer may be cured in a manner that depends on the particular application, such as thermosetting when the second coating layer is water soluble or hot melt, and the invention is not limited thereto.
A transparent bonding layer (glue layer) is coated on the temperature change ink layer, the glue is required to cover 85% -90% of the anti-counterfeiting area and is uniformly distributed, so that the sprayed random laser particles can be uniformly adhered in the anti-counterfeiting area; the glue needs to be as little as possible so as to ensure that the anti-counterfeiting area does not overflow after the film is coated, the using amount can be saved, and the cost is reduced.
Laser particles are sprayed on the bonding layer through the funnel with adjustable frequency, the bottom of the funnel is provided with the punching screen plate with uniformly distributed round holes, namely, the funnel with laser particles is arranged above the base material, the bottom of the funnel is provided with the punching screen plate with phi 6 x 10mm, laser particles (paillettes) are randomly sprayed on the surface of the base material through the vibrating funnel, part of the laser particles are in contact with the bonding layer and are adhered to the anti-counterfeiting area, the rest of the laser particles are scattered outside the anti-counterfeiting area, the vibration frequency is adjusted to be 20-60Hz if the vibration frequency is controlled, the flow of the sprayed laser particles is controlled, more than 80 percent of the laser particles are not stacked, floating laser particles are conveniently removed, the using amount of the laser particles is reduced. 1-5 cm2Within the range, the number of the laser particles is more than or equal to 35 and less than or equal to 120, the laser particles are too small to be identified by a program, the shapes of the random laser particles are at least more than three, the distance between the random laser particles is not less than 0.5mm, the random laser particles are not overlapped, and the random laser particles are uniformly distributed in an anti-counterfeiting area coated with black ink. And after spraying the laser particles, removing the floating laser particles outside the anti-counterfeiting area through a blower and an air draft device. The air blower is arranged on one side, the air outlet is about 10cm away from the label, the air pressure is 0.4-0.8MPa, the air suction opening of the air suction device is 2-4cm away from the label surface, and the area is about 400cm2The fan speed is 800-. The above parameters can be adjusted according to specific conditions, as long as the floating laser particles outside the anti-counterfeiting area can be removed, and the laser particles in the anti-counterfeiting area are retained, which is not limited in the invention.
And curing the adhesive layer by passing the label through a drying tunnel, wherein the curing mode of the adhesive layer can be a thermal curing mode or an ultraviolet curing mode, and the curing mode of the adhesive layer is determined according to specific use conditions, for example, the adhesive layer can be a thermosetting mode when the adhesive layer is water-soluble or hot-melt, but the invention is not limited to the method. And after the adhesive layer is cured, covering a transparent film on the random laser particles to protect the label, and finally performing a die cutting process. Wherein, the tectorial membrane adopts cold compress or the mode of bonding, and when using the cold compress mode, the tectorial membrane material chooses for use the epimembranal or the transparent non-setting adhesive of gluing.
According to the third manufacturing method of the color-changing anti-counterfeiting label, the manufacturing method of the color-changing anti-counterfeiting label comprises the following steps: setting an anti-counterfeiting area on a base material, wherein the base material can be coated paper, fragile paper, synthetic paper, polyethylene terephthalate (PET) and the like; coating a second coating and a temperature change ink layer on the anti-counterfeiting area, and then placing the partition plate with the spraying holes on the base material, wherein the anti-counterfeiting area is exposed at the spraying holes; mixing laser particles and a bonding liquid, and spraying the mixture on an anti-counterfeiting area through a spray gun, wherein the shape of the laser particles is not limited, the size of the laser particles is 0.1-5 mm, the laser particles are PET (polyethylene terephthalate) with laser characteristics on the surface, and it should be understood that the step of mixing the laser particles and the bonding layer can be any step before the mixed solution of the laser particles and the bonding liquid is loaded into the spray gun and sprayed on a substrate, and the operation sequence is not limited; the bonding liquid is solidified to form a bonding layer in a thermal curing or ultraviolet curing mode, so that the anti-counterfeiting label is formed, wherein the laser particles are embedded on the bonding layer, the bonding layer is transparent, the color of the anti-counterfeiting area of the color of the laser particles is different, and the anti-counterfeiting area is used as a bottom color layer. On the formed anti-counterfeiting label, the laser particles can be uniformly adhered and embedded on the adhesive layer of the anti-counterfeiting area, and the random laser particles are not overlapped to form a random anti-counterfeiting pattern, wherein the laser particles on the adhesive layer have completely random characteristics, the formed anti-counterfeiting label has three-dimensional characteristics and four-dimensional photosensitive characteristics, and the anti-counterfeiting performance of the anti-counterfeiting label is enhanced; and the temperature-changing ink layer is damaged after being heated, so that the color-changing anti-counterfeiting label is prevented from being taken off for secondary use.
Laser particles and mixed powder are arranged in a spray gun, a spray head of the spray gun is positioned above a base material, the uniformly stirred laser particles and binding liquid are sprayed to an anti-counterfeiting area by utilizing the working principle of the spray gun, in order to prevent a non-anti-counterfeiting area from being polluted, a partition plate mould with at least one spraying hole is placed on the surface of a label base material, the anti-counterfeiting area is exposed, the non-anti-counterfeiting area is shielded by a partition plate, and the uniformly stirred mixed liquid of the laser particles and the binding liquid cannot be sprayed to the non-anti-counterfeiting area but is accurately sprayed to the anti-counterfeiting area. The flow rates of the binding liquid and the laser particles are adjusted by adjusting the pressure of the spray gun, so that the laser particles are not stacked, and then the binding layer is cured by a thermal curing or ultraviolet curing mode, wherein the binding layer is used for fixing the laser particles in an anti-counterfeiting area. It should be understood that the curing method of the adhesive layer can be selected according to the actual material, and the adhesive layer can be water-soluble or hot-melt, and can be thermosetting, and the invention is not limited thereto.
According to the fourth manufacturing method of the color-changing anti-counterfeiting label, the base material is placed on a printing production line under the environment of 25 ℃ plus or minus 5 and 50% RH plus or minus 10 humidity, the moving speed of the production line is 50 m/min-80 m/min, the printing speed is low when the moving speed is lower than the speed range, the quality of a printed product is poor when the moving speed is higher than the speed range, ink is not sufficiently adhered on the base material, and the yield is reduced. Coating a transparent second coating on a substrate containing an anti-counterfeiting area, wherein the thickness of the second coating can be adjusted by adjusting the number of lines of a rubber roller, optionally, a 300-500-line rubber roller is used for coating to ensure the proper thickness of the coating, and then, the second coating is cured by a heat curing or ultraviolet curing mode through a drying tunnel of 30-50 m, wherein the heat curing temperature is 80-130 ℃, the curing time is 30-60S, the ultraviolet curing wavelength is 200-400 nm, and the curing time is 2-3S. Printing black ink on the second coating, wherein the black ink comprises a bar code area and an anti-counterfeiting area, and the anti-counterfeiting area and the bar code area are printed simultaneously, and the temperature change ink is printed in the anti-counterfeiting area and is printed in a silk screen printing mode to form a temperature change ink layer; the bar code area can be printed by silk screen printing, digital printing, carbon ribbon printing or code spraying. It should be understood that the second coating layer may be cured in a manner that depends on the particular application, such as thermosetting when the second coating layer is water soluble or hot melt, and the invention is not limited thereto.
Mixing the bonding liquid and the laser particles, wherein the viscosity of the mixed liquid is 100-30000 cps, loading the mixed liquid of the bonding liquid and the laser particles into a spray gun, spraying the mixed liquid of the transparent bonding liquid (glue) and the laser particles on an ink layer, adjusting the spraying amount and the spraying thickness of the mixed liquid of the bonding liquid and the laser particles by adjusting the pressure of the spray gun, wherein the glue and the laser particles are required to cover an anti-counterfeiting area and are uniformly distributed, so that the sprayed random laser particles can be uniformly adhered to the anti-counterfeiting area; the glue needsThe anti-counterfeiting area is prevented from overflowing after the film is coated as little as possible, the using amount is saved, and the cost is reduced. That is, a spray gun containing a mixed liquid of a bonding liquid (glue) and laser particles is arranged above the base material, the laser particles (paillettes) and the bonding layer are sprayed on the surface of the base material by adjusting the pressure of the spray gun, the laser particles are mixed with the bonding liquid and adhered to an anti-counterfeiting area, the pressure of the spray gun is adjusted to be 0.3-0.6 MPa, the flow of sprayed laser particles is controlled, more than 80% of the laser particles are prevented from being laminated, the using amount of the laser particles is reduced, and the cost is reduced; and adjusting the distance between the outlet of the spray gun and the spraying hole to be 10-40 cm. The quantity of the random laser particles in a unit volume is also controlled by controlling the mixing ratio of the random laser particles and the glue. In one embodiment, the distance is 1-5 cm2In the range, the number of laser particles is 35 or more and 120 or less, and too small number of laser particles results in no recognition by the program. And the shapes of the random laser particles are at least more than three, the distance between the random laser particles is not less than 0.5mm, the random laser particles are not overlapped, and the random laser particles are uniformly distributed in the anti-counterfeiting area coated with black ink. It should be understood that the distance between the outlet of the spray gun and the spraying hole is related to the size of the anti-counterfeiting area, and in the specific production process, the distance between the outlet of the spray gun and the anti-counterfeiting area is adjusted according to the size of the anti-counterfeiting area; the spraying pressure of the spray gun is related to the viscosity, and the pressure of the spray gun is adjusted according to the viscosity in the specific production process.
And curing the label through a drying tunnel to form a bonding layer, wherein the curing mode of the bonding layer can be a thermal curing mode or an ultraviolet curing mode, and the curing mode of the bonding layer is determined according to specific use conditions, for example, the bonding layer can be a thermal curing mode when the bonding layer is water-soluble or hot-melt, and the invention is not limited to the method. And after the adhesive layer is cured, covering a transparent film on the random laser particles to protect the label, and finally performing a die cutting process. Wherein, the tectorial membrane adopts cold compress or the mode of bonding, and when using the cold compress mode, the tectorial membrane material chooses for use the epimembranal or the transparent non-setting adhesive of gluing.
According to the fifth manufacturing mode of the color-changing anti-counterfeiting label, a silk screen is placed on a base material, the silk screen can be 25-200 meshes, and the base material can be coated paper, fragile paper, synthetic paper, polyethylene terephthalate (PET) and the like; printing a second coating and a temperature-change ink layer on the anti-counterfeiting area in a screen printing mode, mixing laser particles and a bonding liquid, pouring a mixed solution of the laser particles and the bonding liquid onto a screen, wherein the bonding liquid is transparent, the shape of the laser particles is not limited, the size of the laser particles is 0.1-5 mm, the laser particles are PET (polyethylene terephthalate) with laser characteristics on the surface, and it should be understood that the step of mixing the laser particles and the bonding layer can be any step before the mixed solution of the laser particles and the bonding liquid is poured onto the screen and blade-coated to a base material, and the operation sequence is not limited; the mixed solution of the laser particles and the bonding liquid is coated on the substrate along the silk screen by a scraper; and curing the adhesive liquid in a thermal curing or ultraviolet curing mode to form an adhesive layer and form the anti-counterfeiting label. The laser particles are embedded on the adhesive layer, the adhesive layer is transparent, the color of the color anti-counterfeiting areas of the laser particles is different, and the anti-counterfeiting areas serve as the base color layers. On the formed anti-counterfeiting label, the laser particles can be uniformly adhered and embedded on the adhesive layer of the anti-counterfeiting area, and the random laser particles are not overlapped to form a random anti-counterfeiting pattern, wherein the laser particles on the adhesive layer have completely random characteristics, the formed anti-counterfeiting label has three-dimensional characteristics and four-dimensional photosensitive characteristics, and the anti-counterfeiting performance of the anti-counterfeiting label is enhanced; and the temperature-changing ink layer is damaged after being heated, so that the color-changing anti-counterfeiting label is prevented from being taken off for secondary use. .
In the above embodiment, the thickness of the bonding layer is adjusted by the mesh number of the screen printing plate, and the larger the mesh number of the screen is, the smaller the amount of the bonding liquid and the laser particle mixed liquid leaked from the screen is, the thinner the thickness of the bonding layer is, and the thickness of the bonding layer can be 0.01-1 mm. A suitable screen plate is selected according to the thickness of the adhesive layer. The bonding layer and the laser particles are uniformly stirred, mixed liquid of the laser particles and bonding liquid is poured into one end of the screen printing plate during printing, a scraper is used for applying certain pressure on the mixed liquid of the laser particles and the bonding liquid on the screen printing plate, and the scraper moves towards the other end of the screen printing plate. The mixed liquid of the laser particles and the bonding liquid is extruded out of the meshes by the scraper in the moving process and is extruded to the anti-counterfeiting area of the base material to form random laser particle patterns, the bonding liquid is cured in a heat curing or ultraviolet curing mode to form a bonding layer, and the random particles are embedded in the bonding layer.
According to the sixth manufacturing method of the color-changing anti-counterfeiting label, the base material is prevented from being on a printing production line under the environment of 25 ℃ plus or minus 5 and 50% RH plus or minus 10 humidity, the moving speed of the production line is 50 m/min-80 m/min, the printing speed is low when the moving speed is lower than the speed range, the quality of a printed product is poor when the moving speed is higher than the speed range, the ink is not sufficiently adhered on the base material, and the yield is reduced. Coating a transparent second coating on a substrate containing an anti-counterfeiting area, wherein the thickness of the second coating can be adjusted by adjusting the number of rubber covered rollers, optionally, 300-500 rubber covered rollers are used for coating to ensure the proper thickness of the coating, and then the second coating is cured by a heat curing or ultraviolet curing mode through a drying tunnel of 30-50 m, wherein the heat curing temperature is 80-130 ℃, the curing time is 30-60S, the ultraviolet curing wavelength is 200-400 nm, and the curing time is 2-3S. Printing black ink on the second coating, wherein the black ink comprises a bar code area and an anti-counterfeiting area, and the anti-counterfeiting area and the bar code area are printed simultaneously, and the temperature change ink is printed in the anti-counterfeiting area and is printed in a silk screen printing mode to form a temperature change ink layer; the bar code area can be printed by silk screen printing, digital printing, carbon ribbon printing or code spraying. . It should be understood that the second coating layer may be cured in a manner that depends on the particular application, such as thermosetting when the second coating layer is water soluble or hot melt, and the invention is not limited thereto.
Mixing the bonding liquid and the laser particles, wherein the viscosity of the bonding liquid is 100-30000 cps, placing a silk screen plate on the ink layer, wherein the silk screen plate is provided with a plurality of silk screens (25-200 meshes, 30-200 mm), pouring a mixed liquid of the transparent bonding liquid (glue) and the laser particles into the silk screens, pressing the mixed liquid of the bonding liquid and the laser particles by using a scraper, extruding the mixed liquid of the bonding liquid and the laser particles into an anti-counterfeiting area through the silk screens, covering the anti-counterfeiting area with the bonding liquid and the laser particles, and uniformly distributing the bonding liquid and the laser particles so that the sprayed random laser particles can be uniformly adhered to the anti-counterfeiting area; the glue needs to be as little as possible so as to ensure that the anti-counterfeiting area does not overflow after the film is coated, the using amount can be saved, and the cost is reduced. By adjusting the mesh number of the silk screen, the laser particles (sequins) are bondedThe layer blade coating is to the substrate surface, and the miscella adhesion of radium-shine granule and bonding liquid is in anti-fake district, and the flow of control blade coating miscella ensures that more than about 80% radium-shine granule is not range upon range of, reduces radium-shine granule quantity simultaneously, reduces the cost. The quantity of the random laser particles in a unit volume is also controlled by controlling the mixing ratio of the random laser particles and the glue. In one embodiment, the distance is 1-5 cm2In the range, the number of laser particles is 35 or more and 120 or less, and too small number of laser particles results in no recognition by the program. And the shapes of the random laser particles are at least more than three, the distance between the random laser particles is not less than 0.5mm, the random laser particles are not overlapped, and the random laser particles are uniformly distributed in the anti-counterfeiting area coated with black ink.
And curing the adhesive liquid through a drying tunnel to form the adhesive layer, wherein the adhesive layer can be cured by a heat curing or ultraviolet curing mode, and the adhesive layer can be cured by a heat curing or ultraviolet curing mode according to specific use conditions, for example, the adhesive layer can be water-soluble or heat-fusible. And after the adhesive layer is cured, covering a transparent film on the random laser particles to protect the label, and finally performing a die cutting process. Wherein, the tectorial membrane adopts cold compress or the mode of bonding, and when using the cold compress mode, the tectorial membrane material chooses for use the epimembranal or the transparent non-setting adhesive of gluing.
The color-changing anti-counterfeiting label manufacturing method is carried out at normal temperature and normal pressure, the formed color-changing ink layer in the color-marking anti-counterfeiting label is damaged after being subjected to temperature change, label information cannot be identified, the color-changing anti-counterfeiting label is prevented from being torn off for secondary use, in addition, laser particles are embedded on the adhesive layer, the randomness of the laser particles is realized, three-dimensional anti-counterfeiting is realized, the surfaces of the random laser particles also have laser characteristics, the four-dimensional change characteristics are presented under light, the anti-counterfeiting effect of the label is enhanced by combining the two characteristics, and the characteristic that the label cannot be copied is realized.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims (10)

1. A color-changing security label, comprising:
the anti-counterfeiting printing plate comprises a base material, wherein an anti-counterfeiting area is set on the base material;
the temperature change ink layer is positioned on the anti-counterfeiting area; and
the random anti-counterfeiting particles are positioned on the temperature-change ink layer;
the color of the temperature-variable ink layer is different from that of the base material, and the color of the random anti-counterfeiting particles is different from that of the base material after the random anti-counterfeiting particles are superposed with the temperature-variable ink layer.
2. The color-changing anti-counterfeiting label according to claim 1, further comprising a bonding layer, wherein the bonding layer is positioned on the temperature-changing ink layer, the random anti-counterfeiting particles are randomly embedded on the bonding layer, and the bonding layer is a transparent coating.
3. The color-changing security label according to claim 1, wherein a second coating layer is provided between the substrate and the temperature-changing ink layer, the color of the random security particles after being superimposed with the substrate, the second coating layer and the temperature-changing ink layer is different, and the color of the temperature-changing ink layer after being superimposed with the substrate and the second coating layer is different.
4. A color-changing security label according to claim 1, wherein a transparent film layer is covered on the random security particles.
5. A color-changing anti-counterfeit label according to claim 4, wherein the coating layer is one of a polyethylene terephthalate layer, an o-phenylphenol layer and a thermoplastic polyurethane elastomer layer.
6. The color-changing security label according to claim 1, wherein the substrate is one of coated paper, fragile paper, synthetic paper, and polyethylene terephthalate.
7. The color-changing anti-counterfeiting label according to claim 1, wherein the random anti-counterfeiting particle material is one of polyethylene terephthalate, polyvinyl chloride and o-phenylphenol; the shape of the random anti-counterfeiting particles is one or a combination of more than two of round, triangular, trapezoidal, square, linear, hexagonal, rhombic and irregular shapes.
8. The color-changing security label according to any one of claims 1 or 7, wherein the random security particles are laser particles.
9. A color-changing security label according to claim 1, wherein said substrate further comprises a barcode region, and said barcode region does not overlap said security region.
10. The color-changing security label according to any one of claims 1 or 9, wherein the substrate further comprises logo and/or fixed information printed by temperature-changing ink.
CN202010030194.5A 2020-01-13 2020-01-13 Color-changing anti-counterfeit label Pending CN111105700A (en)

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