CN114863791A - Multiple anti-counterfeit label and preparation method thereof - Google Patents
Multiple anti-counterfeit label and preparation method thereof Download PDFInfo
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- CN114863791A CN114863791A CN202210415086.9A CN202210415086A CN114863791A CN 114863791 A CN114863791 A CN 114863791A CN 202210415086 A CN202210415086 A CN 202210415086A CN 114863791 A CN114863791 A CN 114863791A
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- 238000002360 preparation method Methods 0.000 title claims description 10
- 230000000694 effects Effects 0.000 claims abstract description 39
- 239000000758 substrate Substances 0.000 claims abstract description 38
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- 239000002096 quantum dot Substances 0.000 claims description 29
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 21
- 238000001553 co-assembly Methods 0.000 claims description 18
- 239000002019 doping agent Substances 0.000 claims description 18
- 239000002904 solvent Substances 0.000 claims description 15
- HHPCNRKYVYWYAU-UHFFFAOYSA-N 4-cyano-4'-pentylbiphenyl Chemical group C1=CC(CCCCC)=CC=C1C1=CC=C(C#N)C=C1 HHPCNRKYVYWYAU-UHFFFAOYSA-N 0.000 claims description 11
- 238000001291 vacuum drying Methods 0.000 claims description 10
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- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 6
- -1 polyethylene Polymers 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- ZGOWXOZNUNZPAV-UHFFFAOYSA-N 4-(4-heptylphenyl)benzonitrile Chemical group C1=CC(CCCCCCC)=CC=C1C1=CC=C(C#N)C=C1 ZGOWXOZNUNZPAV-UHFFFAOYSA-N 0.000 claims description 4
- 239000011258 core-shell material Substances 0.000 claims description 4
- 239000010453 quartz Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- GPGGNNIMKOVSAG-UHFFFAOYSA-N 4-(4-octoxyphenyl)benzonitrile Chemical group C1=CC(OCCCCCCCC)=CC=C1C1=CC=C(C#N)C=C1 GPGGNNIMKOVSAG-UHFFFAOYSA-N 0.000 claims description 3
- RDISTOCQRJJICR-UHFFFAOYSA-N 4-(4-pentoxyphenyl)benzonitrile Chemical group C1=CC(OCCCCC)=CC=C1C1=CC=C(C#N)C=C1 RDISTOCQRJJICR-UHFFFAOYSA-N 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 238000006862 quantum yield reaction Methods 0.000 claims description 3
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- COHYTHOBJLSHDF-UHFFFAOYSA-N Indigo Chemical compound N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 3
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- QGLWBTPVKHMVHM-KTKRTIGZSA-N (z)-octadec-9-en-1-amine Chemical compound CCCCCCCC\C=C/CCCCCCCCN QGLWBTPVKHMVHM-KTKRTIGZSA-N 0.000 description 1
- 235000000177 Indigofera tinctoria Nutrition 0.000 description 1
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- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F3/0291—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
- G09F3/0294—Labels 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
Abstract
The invention provides a multiple anti-counterfeit label, comprising: an upper transparent base layer and a lower transparent base layer; two conductive ITO layers respectively arranged on the inner sides of the upper and lower transparent base layers; the printing ink layer is arranged in the two conductive ITO layers; an information reading layer disposed outside the lower transparent base layer; a substrate color development layer disposed on a lower side of the information reading layer; two photosensitive curing agent layers respectively arranged at two sides of the layer structure; the ink layer adopts ink with multiple anti-counterfeiting effects. Compared with the prior art, the multiple anti-counterfeiting label provided by the invention adopts a specific layer structure to realize better overall interaction under a specific connection relation, can respond to external stimuli such as temperature, light excitation, color change of a polaroid and a substrate and the like, realizes multiple information anti-counterfeiting property, and simultaneously has the advantages of bright and durable color, no fading and other problems due to the fact that the observed color under natural light comes from the structural color, and excellent anti-counterfeiting effect.
Description
Technical Field
The invention relates to the technical field of novel multi-mode multiple anti-counterfeiting, in particular to a multiple anti-counterfeiting label and a preparation method thereof.
Background
Among many anti-counterfeiting technologies, anti-counterfeiting labels are most widely used; however, the anti-counterfeit label technology widely applied at present has been deeply researched and understood by fake makers, so that there are many cases to be cracked, and a novel anti-counterfeit label technology with high technical innovation and cracking difficulty and multiple anti-counterfeit capabilities is urgently needed.
Disclosure of Invention
In view of the above, the present invention provides a multiple anti-counterfeit label and a method for manufacturing the same, which can respond to external stimuli such as temperature, light excitation, color change of a polarizer and a substrate, and have an excellent anti-counterfeit effect.
The invention provides a multiple anti-counterfeit label, comprising:
an upper transparent base layer and a lower transparent base layer;
two conductive ITO layers respectively arranged on the inner sides of the upper transparent base layer and the lower transparent base layer;
the printing ink layer is arranged in the two conductive ITO layers;
an information reading layer disposed outside the lower transparent base layer;
a substrate color development layer disposed on a lower side of the information reading layer;
two photosensitive curing agent layers respectively arranged at two sides of the layer structure;
the ink layer adopts ink with multiple anti-counterfeiting effects.
Preferably, the upper and lower transparent base layers are made of glass, quartz, polyethylene or polypropylene.
Preferably, the ink with multiple anti-counterfeiting effects is prepared from the following raw materials:
3 parts by weight of molecules having macroscopic co-assembly capability;
1-2 parts by weight of organic chiral dopant;
0.1-0.3 part by weight of high-quality III-V group quantum dots;
the molecule with macroscopic co-assembly capability is selected from one or more of 4 ' -n-pentyl-4-cyanobiphenyl, 4 ' -n-pentyloxy-4-cyanobiphenyl, 4 ' -n-heptyl-4-cyanobiphenyl, 4 ' -n-octyloxy-4-cyanobiphenyl and 4 ' -n-pentyl-4-cyanobiphenyl;
the chemical structure of the organic chiral dopant is shown as the formula (I):
preferably, the high-quality III-V group quantum dot has a core-shell structure of InP/ZnSeS/ZnS, a light-emitting peak is 520nm, a half-peak width is 45nm, and a quantum yield is 80.0-85.0%.
Preferably, the preparation method of the ink with multiple anti-counterfeiting effects specifically comprises the following steps:
mixing molecules with macroscopic co-assembly capacity, an organic chiral dopant, high-quality III-V group quantum dots and a solvent to obtain a mixed solution; and then, carrying out vacuum drying on the obtained mixed solution to remove the solvent, thereby obtaining the printing ink with multiple anti-counterfeiting effects.
Preferably, the solvent is selected from one or more of toluene, n-hexane and chloroform;
the mixing mode is ultrasonic for 10min to 20 min;
the temperature of the vacuum drying is 30-45 ℃, and the time is 12-24 h.
Preferably, the thickness of the ink layer is 15 to 200 μm.
Preferably, the information reading layer is composed of a transparent, single-sided adhesive substrate and a two-dimensional code of a proper color adhered to the substrate.
Preferably, the substrate color development layer is a black base.
The invention also provides a preparation method of the multiple anti-counterfeit label in the technical scheme, which comprises the following steps:
respectively coating ITO on the inner sides of the upper transparent base layer and the lower transparent base layer to form two conductive ITO layers; then packaging the printing ink between the two conductive ITO layers; then aligning and attaching the information reading layer and the lower transparent base layer, and placing the information reading layer and the lower transparent base layer on the substrate color development layer; and finally, fixing the two sides of the layer structure by using a photosensitive curing agent to obtain the multiple anti-counterfeiting label.
The invention provides a multiple anti-counterfeit label, comprising: an upper transparent base layer and a lower transparent base layer; two conductive ITO layers respectively arranged on the inner sides of the upper and lower transparent base layers; the printing ink layer is arranged in the two conductive ITO layers; an information reading layer disposed outside the lower transparent base layer; a substrate color development layer disposed on a lower side of the information reading layer; two photosensitive curing agent layers respectively arranged at two sides of the layer structure; the ink layer adopts ink with multiple anti-counterfeiting effects. Compared with the prior art, the multiple anti-counterfeiting label provided by the invention adopts a specific layer structure to realize better overall interaction under a specific connection relation, can respond to external stimuli such as temperature, light excitation, color change of a polaroid and a substrate and the like, realizes multiple information anti-counterfeiting property, and simultaneously has the advantages of bright and durable color, no fading and other problems due to the fact that the observed color under natural light comes from the structural color, and excellent anti-counterfeiting effect.
In addition, the printing ink layer adopts printing ink with multiple anti-counterfeiting effects, the used luminescent substance is III-V group quantum dots, the luminescent property is excellent, and the light emitted by the system is circularly polarized light, so that the printing ink layer has more unique anti-counterfeiting property and capability; and the III-V group quantum dots are cadmium-free quantum dots, so that the toxicity and the harm to the environment are greatly reduced.
Drawings
Fig. 1 is a schematic structural diagram of a multiple anti-counterfeit label provided by the present invention;
FIG. 2 is a diagram illustrating the physical effect of the multiple anti-counterfeit inks with blue, green and red structural colors prepared in examples 1 to 3 of the present invention;
FIG. 3 is a diagram illustrating physical effects of the multiple anti-counterfeit labels prepared in embodiments 1 to 3 of the present invention;
fig. 4 is a diagram of the physical effect of the multiple anti-counterfeit labels prepared in embodiments 1 to 3 of the present invention when the colors are observed at an inclination of 45 °.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a multiple anti-counterfeit label, comprising:
an upper transparent base layer and a lower transparent base layer;
two conductive ITO layers respectively arranged on the inner sides of the upper and lower transparent base layers;
the printing ink layer is arranged in the two conductive ITO layers;
an information reading layer disposed outside the lower transparent base layer;
a substrate color development layer disposed on a lower side of the information reading layer;
two photosensitive curing agent layers respectively arranged at two sides of the layer structure;
the ink layer adopts ink with multiple anti-counterfeiting effects.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a multiple anti-counterfeit label according to the present invention; the transparent substrate comprises a substrate, a transparent base layer, an upper conductive ITO layer, an ink layer, a lower conductive ITO layer, an information reading layer, photosensitive curing agent layers and substrate color development layers, wherein the substrate is 1, the upper conductive ITO layer is 2, the ink layer is 3, the lower conductive ITO layer is 4, the lower transparent base layer is 5, the information reading layer is 6, the photosensitive curing agent layers are 7-8, and the substrate color development layer is 9.
In the present invention, the material of the upper and lower transparent base layers is preferably glass, quartz, polyethylene or polypropylene, and more preferably quartz, i.e. the material used for the upper and lower transparent base layers in the embodiment of the present invention.
In the invention, the upper conductive ITO layer is arranged on the inner side (lower side) of the upper transparent base layer, the lower conductive ITO layer is arranged on the inner side (upper side) of the lower transparent base layer, and the ink layer is arranged between the upper conductive ITO layer and the lower conductive ITO layer.
In the invention, the ink layer adopts ink with multiple anti-counterfeiting effects, and the ink with multiple anti-counterfeiting effects is prepared from the following raw materials:
3 parts by weight of molecules having macroscopic co-assembly capability;
1-2 parts by weight of organic chiral dopant;
0.1-0.3 part by weight of high-quality III-V group quantum dots;
more preferably:
3 parts by weight of molecules having macroscopic co-assembly capability;
1.4-1.6 parts by weight of organic chiral dopant;
0.2 part by weight of high-quality III-V group quantum dots.
In the invention, the ink with multiple anti-counterfeiting effects comprises molecules with macroscopic co-assembly capability, organic chiral dopants and high-quality III-V group quantum dots, and preferably consists of the molecules with macroscopic co-assembly capability, the organic chiral dopants and the high-quality III-V group quantum dots. The printing ink layer adopts printing ink with multiple anti-counterfeiting effects, wherein the used luminescent substance is III-V group quantum dots, the printing ink layer has excellent luminescent property, and the light emitted by the system is circularly polarized light, so that the printing ink layer has more unique anti-counterfeiting property and capability; and the III-V group quantum dots are cadmium-free quantum dots, so that the toxicity and the harm to the environment are greatly reduced.
In the present invention, the molecule having macroscopic co-assembly ability is preferably one or more selected from the group consisting of 4 '-n-pentyl-4-cyanobiphenyl (5CB), 4' -n-pentyloxy-4-cyanobiphenyl (5OCB), 4 '-n-heptyl-4-cyanobiphenyl (7CB), 4' -n-octyloxy-4-cyanobiphenyl (8OCB) and 4 '-n-pentyl-4-cyanobiphenyl (5CT), and more preferably 4' -n-pentyl-4-cyanobiphenyl. The source of the molecule having macroscopic co-assembly ability is not particularly limited in the present invention, and commercially available products well known to those skilled in the art may be used.
In the invention, the chemical structure of the organic chiral dopant is shown as formula (I):
the source of the organic chiral dopant is not particularly limited in the present invention, and commercially available products or self-prepared products known to those skilled in the art may be used.
In the invention, the structure of the high-quality III-V group quantum dot is preferably an InP/ZnSeS/ZnS core-shell structure, the luminous peak is positioned at 520nm, the full width at half maximum (FWHM) is 45nm, and the quantum yield is 80.0-85.0%. The source of the high-quality III-V quantum dots is not particularly limited by the invention, and the high-quality III-V quantum dots can be obtained from commercial products or self-prepared products which are well known to those skilled in the art.
According to the invention, the specific components with specific contents are adopted, so that the overall good interaction is realized, and the macroscopic co-assembled circular polarized light-emitting system with high quality factors is prepared, has the ink property and the structural color of selective reflection, and can observe different effects under the left/right polarizing plates respectively; can emit circular polarization fluorescence under the excitation of ultraviolet light (such as 365nm ultraviolet lamp), and the fluorescence has larger asymmetric factor and can present more obvious brightness difference under a left/right polarization plate; and can respond to temperature changes, so that structural color is lost; with the inclination of the observation angle, a distinct blue shift phenomenon can be observed. By combining the properties, the ink with multiple anti-counterfeiting effects has wider application prospect and better scene adaptability, and has great application potential in the anti-counterfeiting direction.
In the present invention, the preparation method of the ink with multiple anti-counterfeiting effects preferably comprises:
mixing molecules with macroscopic co-assembly capacity, an organic chiral dopant, high-quality III-V group quantum dots and a solvent to obtain a mixed solution; and then, carrying out vacuum drying on the obtained mixed solution to remove the solvent, thereby obtaining the printing ink with multiple anti-counterfeiting effects.
In the present invention, the molecule with macroscopic co-assembly ability, the organic chiral dopant, and the high-quality III-V group quantum dot are the same as those in the above technical solution, and are not described herein again.
In the present invention, the solvent is preferably selected from one or more of toluene, n-hexane and chloroform, and more preferably toluene. The source of the solvent is not particularly limited in the present invention, and commercially available products known to those skilled in the art may be used. In the invention, the solvent is used for dissolving the molecules with the macroscopic co-assembly capability, the organic chiral dopant and the inorganic luminescent material to form a uniform and transparent mixed solution.
In the invention, the mixing mode is preferably ultrasonic for 10min to 20min, and more preferably ultrasonic for 15 min; during the mixing process, the temperature can be properly increased to facilitate the dissolving process.
In the invention, the temperature of the vacuum drying is preferably 30-45 ℃, more preferably 40 ℃, and the time is preferably 12-24 h; the present invention adopts the above vacuum drying for the purpose of evaporating the solvent; and finally, cooling to room temperature to obtain the ink with multiple anti-counterfeiting effects.
In the invention, the preparation method of the ink with multiple anti-counterfeiting effects has the advantages of simple process, easy control, low cost and wide application prospect.
In the present invention, the thickness of the ink layer is preferably 15 to 200 μm, and more preferably 25 to 200 μm.
In the present invention, the information reading layer is disposed outside (lower side) the lower transparent base layer; the information reading layer is preferably composed of a transparent, single-sided adhesive substrate and a suitably colored two-dimensional code adhered to the substrate.
In the present invention, the substrate color-developing layer is disposed on the lower side of the information reading layer, thereby forming an overall layer structure; the substrate color development layer is preferably a black substrate, and the specific material of the substrate color development layer is not particularly limited in the invention.
In the invention, after the integral layer structure is formed, the final encapsulation/fixation is realized by arranging the photosensitive curing agent layers on the two sides, and the multiple anti-counterfeiting label is obtained.
The multiple anti-counterfeiting label provided by the invention adopts a specific layer structure to realize better overall interaction under a specific connection relation, can respond to external stimuli such as temperature, light excitation, color change of a polaroid and a substrate and the like, realizes multiple information anti-counterfeiting property, and simultaneously has the advantages that the observed color under natural light comes from the structural color, the color is bright and durable, the problems of fading and the like do not exist, and the anti-counterfeiting effect is excellent.
The invention also provides a preparation method of the multiple anti-counterfeit label in the technical scheme, which comprises the following steps:
respectively coating ITO on the inner sides of the upper transparent base layer and the lower transparent base layer to form two conductive ITO layers; then packaging the printing ink between the two conductive ITO layers; then aligning and attaching the information reading layer and the lower transparent base layer, and placing the information reading layer and the lower transparent base layer on the substrate color development layer; and finally, fixing the two sides of the layer structure by using a photosensitive curing agent to obtain the multiple anti-counterfeiting label.
The invention provides a multiple anti-counterfeit label, comprising: an upper transparent base layer and a lower transparent base layer; two conductive ITO layers respectively arranged on the inner sides of the upper and lower transparent base layers; the printing ink layer is arranged in the two conductive ITO layers; an information reading layer disposed outside the lower transparent base layer; a substrate color development layer disposed on a lower side of the information reading layer; two photosensitive curing agent layers respectively arranged at two sides of the layer structure; the ink layer adopts ink with multiple anti-counterfeiting effects. Compared with the prior art, the multiple anti-counterfeiting label provided by the invention adopts a specific layer structure to realize better overall interaction under a specific connection relation, can respond to external stimuli such as temperature, light excitation, color change of a polaroid and a substrate and the like, realizes multiple information anti-counterfeiting property, and simultaneously has the advantages of bright and durable color, no fading and other problems due to the fact that the observed color under natural light comes from the structural color, and excellent anti-counterfeiting effect.
In addition, the printing ink layer adopts printing ink with multiple anti-counterfeiting effects, the used luminescent substance is III-V group quantum dots, the luminescent property is excellent, and the light emitted by the system is circularly polarized light, so that the printing ink layer has more unique anti-counterfeiting property and capability; and the III-V group quantum dots are cadmium-free quantum dots, so that the toxicity and the harm to the environment are greatly reduced.
To further illustrate the present invention, the following examples are provided for illustration. The high quality quantum dots used in the following examples of the invention are high quality group III-V quantum dots: the InP/ZnSeS/ZnS core-shell composite material is prepared by growing ZnSeS and ZnS shells layer by layer after InP core by using an oil phase one-pot method, and the specific preparation method comprises the following steps:
mixing InI in a three-necked flask 3 、ZnBr 2 (In/Zn molar ratio ═ 1: 6.5) and oleylamine (5.0mL, 15 mmol); the mixtures were first degassed at 120 ℃ for 20min, after which the mixture was heated to 200 ℃ and 0.45mL (2.40mmol) of (DMA) was added 3 P is injected rapidly into the mixture; when an InP core of the desired size was obtained, 12ml of a zinc precursor solution (3g of zinc stearate dissolved in 12ml of 1-octadecene), 1.2mmol (2.2M) of TOP (Se + S) were injected into the above core solutionThen the temperature is raised to 260 ℃ and kept for 120 min; finally, 1.5ml DDT was injected into InP/ZnSeS solution at 280 ℃ and held for 60 min; and after the reaction, naturally reducing the temperature to room temperature to obtain the InP/ZnSeS/ZnS quantum dots.
Example 1
(1) Sequentially adding an organic chiral dopant S8110.320g, high-quality quantum dots 0.040g and a molecule 4' -n-pentyl-4-cyanobiphenyl 0.600g with macroscopic co-assembly capacity into an open sample bottle, adding an organic solvent toluene 1.0mL, performing ultrasound for 15min to completely mix the components to form a uniform and transparent solution, then putting the sample into a vacuum drying oven, slowly evaporating the solvent for 18h at 40 ℃, and finally cooling to room temperature to obtain the ink with the multiple information anti-counterfeiting effect.
Through detection, the ink with the multiple information anti-counterfeiting effect provided by the embodiment 1 of the invention has the clearing point transition temperature of 14.0 ℃, the blue structural color can be observed at 0.0-14.0 ℃, the color is changed into blue-purple when observed at 45 ℃, the structural color disappears when a polaroid is added, and green fluorescence is emitted when 365nm excitation light is added.
(2) The multiple anti-counterfeit label provided in this embodiment 1 is described in detail with reference to fig. 1: the multiple anti-counterfeiting label consists of an upper transparent base layer 1, a lower transparent base layer 5, two conductive ITO layers 2 and 4 in the upper transparent base layer and the lower transparent base layer, an anti-counterfeiting ink layer 3 in the two conductive ITO layers, an information reading layer 6 under the lower transparent base layer 5, a substrate color development layer 9 and photosensitive curing agent layers 7 and 8 on two sides;
according to the structure in the figure 1, firstly, ITO is coated on the same side of an upper transparent base layer and a lower transparent base layer, then the printing ink with the multiple information anti-counterfeiting effect prepared in the example 1 is packaged between the two base layers, the thickness is controlled to be 100-125 mu m, then an information reading layer is aligned and attached with the transparent base layer on one side, then the combined body is placed on a black substrate color development layer, and the whole is fixed by a photosensitive curing agent, so that the multiple anti-counterfeiting label is obtained.
Through detection, the multiple anti-counterfeit label obtained in the embodiment 1 can observe a blue structural color at 0.0-14.0 ℃, the structural color of the label is changed into blue-purple when observed obliquely at 45 degrees, the structural color disappears when a polaroid is added, the two-dimensional code of the information reading layer can be observed, and green fluorescence is emitted when 365nm excitation light is added, and the two-dimensional code of the information reading layer can be observed.
Example 2
(1) Sequentially adding an organic chiral dopant S8110.300g, high-quality quantum dots 0.040g and a molecule 4' -n-pentyl-4-cyanobiphenyl with macroscopic co-assembly capacity 0.600g into an open sample bottle, adding an organic solvent toluene 1.0mL, performing ultrasound for 15min to completely mix the components to form a uniform and transparent solution, then putting the sample into a vacuum drying oven, slowly evaporating the solvent for 18h at 40 ℃, and finally cooling to room temperature to obtain the printing ink with the multiple information anti-counterfeiting effect.
Through detection, the ink with the multiple information anti-counterfeiting effect provided by the embodiment 2 of the invention has the clearing point transition temperature of 18.0 ℃, green structural color can be observed at 0.0-18.0 ℃, the color is changed into indigo blue when observed at 45 ℃, the structural color disappears when a polarizing film is added, and green fluorescence is emitted when 365nm excitation light is added.
(2) The multiple anti-counterfeit label provided in this embodiment 2 is described in detail with reference to fig. 1: the multiple anti-counterfeiting label consists of an upper transparent base layer 1, a lower transparent base layer 5, two conductive ITO layers 2 and 4 in the upper transparent base layer and the lower transparent base layer, an anti-counterfeiting ink layer 3 in the two conductive ITO layers, an information reading layer 6 under the lower transparent base layer 5, a substrate color development layer 9 and photosensitive curing agent layers 7 and 8 on two sides;
according to the structure in the figure 1, firstly, ITO is coated on the same side of an upper transparent base layer and a lower transparent base layer, then the printing ink with the multiple information anti-counterfeiting effect prepared in the example 2 is packaged between the two base layers, the thickness is controlled to be 100-125 mu m, then an information reading layer is aligned and attached with the transparent base layer on one side, then the combination is placed on a black substrate color development layer, and the whole is fixed by a photosensitive curing agent, so that the multiple anti-counterfeiting label is obtained.
Through detection, the multiple anti-counterfeit label obtained in example 2 can observe a green structural color at 0.0-18.0 ℃, the structural color of the label is changed into indigo color when the label is observed obliquely at 45 degrees, the structural color disappears when a polarizing film is added, the two-dimensional code of the information reading layer can be observed, green fluorescence is emitted when 365nm excitation light is added, and the two-dimensional code of the information reading layer can be observed.
Example 3
(1) Sequentially adding an organic chiral dopant S8110.280g, high-quality quantum dots 0.040g and a molecule 4' -n-pentyl-4-cyanobiphenyl with macroscopic co-assembly capacity 0.600g into an open sample bottle, adding an organic solvent toluene 1.0mL, performing ultrasound for 15min to completely mix the components to form a uniform and transparent solution, then putting the sample into a vacuum drying oven, slowly evaporating the solvent for 18h at 40 ℃, and finally cooling to room temperature to obtain the ink with the multiple information anti-counterfeiting effect.
Through detection, the ink with the multiple information anti-counterfeiting effect provided by the embodiment 2 of the invention has a clearing point transition temperature of 22.0 ℃, a red structural color can be observed at 0.0-22.0 ℃, the color is changed into orange yellow when observed at 45 ℃, the structural color disappears when a polarizing film is added, and green fluorescence is emitted when 365nm excitation light is added.
(2) The multiple anti-counterfeit label provided in this embodiment 3 is described in detail with reference to fig. 1: the multiple anti-counterfeiting label consists of an upper transparent base layer 1, a lower transparent base layer 5, two conductive ITO layers 2 and 4 in the upper transparent base layer and the lower transparent base layer, an anti-counterfeiting ink layer 3 in the two conductive ITO layers, an information reading layer 6 under the lower transparent base layer 5, a substrate color development layer 9 and photosensitive curing agent layers 7 and 8 on two sides;
according to the structure in the figure 1, firstly, ITO is coated on the same side of an upper transparent base layer and a lower transparent base layer, then the printing ink with the multiple information anti-counterfeiting effect prepared in the example 3 is packaged between the two base layers, the thickness is controlled to be 100-125 mu m, then an information reading layer is aligned and attached with the transparent base layer on one side, then the combination is placed on a black substrate color development layer, and the whole is fixed by a photosensitive curing agent, so that the multiple anti-counterfeiting label is obtained.
Through detection, the multiple anti-counterfeit label obtained in example 3 can observe a red structural color at 0.0-22.0 ℃, the structural color of the label is changed into orange yellow when observed obliquely at 45 degrees, the structural color disappears when a polarizing film is added, the two-dimensional code of the information reading layer can be observed, green fluorescence is emitted when 365nm excitation light is added, and the two-dimensional code of the information reading layer can be observed.
Referring to fig. 2, in fig. 2, a real object effect diagram of the multiple anti-counterfeiting ink with blue, green and red structural colors prepared in embodiments 1 to 3 of the present invention is shown from left to right.
Referring to fig. 3 to 4, in fig. 3, a physical effect diagram of the multiple anti-counterfeit labels prepared in embodiments 1 to 3 of the present invention is shown from left to right; fig. 4 is a diagram of the physical effect of the multiple anti-counterfeit labels prepared in embodiments 1 to 3 of the present invention when the colors are observed at an inclination of 45 ° from left to right.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A multiple security label comprising:
an upper transparent base layer and a lower transparent base layer;
two conductive ITO layers respectively arranged on the inner sides of the upper and lower transparent base layers;
the printing ink layer is arranged in the two conductive ITO layers;
an information reading layer disposed outside the lower transparent base layer;
a substrate color development layer provided on a lower side of the information reading layer;
two photosensitive curing agent layers respectively arranged at two sides of the layer structure;
the ink layer adopts ink with multiple anti-counterfeiting effects.
2. The multiple anti-counterfeit label according to claim 1, wherein the upper and lower transparent substrates are made of glass, quartz, polyethylene or polypropylene.
3. The multiple anti-counterfeiting label according to claim 1, wherein the ink with multiple anti-counterfeiting effects is prepared from the following raw materials:
3 parts by weight of molecules having macroscopic co-assembly capability;
1-2 parts by weight of organic chiral dopant;
0.1-0.3 part by weight of high-quality III-V group quantum dots;
the molecule with macroscopic co-assembly capability is selected from one or more of 4 ' -n-pentyl-4-cyanobiphenyl, 4 ' -n-pentyloxy-4-cyanobiphenyl, 4 ' -n-heptyl-4-cyanobiphenyl, 4 ' -n-octyloxy-4-cyanobiphenyl and 4 ' -n-pentyl-4-cyanobiphenyl;
the chemical structure of the organic chiral dopant is shown as the formula (I):
4. the multiple anti-counterfeit label according to claim 3, wherein the high-quality III-V group quantum dot has a core-shell InP/ZnSeS/ZnS structure, a light-emitting peak is 520nm, a half-peak width is 45nm, and a quantum yield is 80.0-85.0%.
5. The multiple anti-counterfeit label according to claim 3, wherein the preparation method of the ink with multiple anti-counterfeit effects comprises:
mixing molecules with macroscopic co-assembly capacity, an organic chiral dopant, high-quality III-V group quantum dots and a solvent to obtain a mixed solution; and then, carrying out vacuum drying on the obtained mixed solution to remove the solvent, thereby obtaining the printing ink with multiple anti-counterfeiting effects.
6. The multiple security label according to claim 5, wherein the solvent is selected from one or more of toluene, n-hexane and chloroform;
the mixing mode is ultrasonic for 10min to 20 min;
the temperature of the vacuum drying is 30-45 ℃, and the time is 12-24 h.
7. The multiple security label of claim 1 wherein the ink layer has a thickness of 15 to 200 μm.
8. The multiple security tag of claim 1 wherein said information reading layer comprises a transparent, single-sided adhesive substrate and a two-dimensional code of a suitable color adhered to the substrate.
9. The multiple security tag of claim 1, wherein the substrate color developing layer is a black matrix.
10. A method for preparing the multiple anti-counterfeit label of any one of claims 1 to 9, comprising the following steps:
respectively coating ITO on the inner sides of the upper transparent base layer and the lower transparent base layer to form two conductive ITO layers; then packaging the printing ink between the two conductive ITO layers; then aligning and attaching the information reading layer and the lower transparent base layer, and placing the information reading layer and the lower transparent base layer on the substrate color development layer; and finally, fixing the two sides of the layer structure by using a photosensitive curing agent to obtain the multiple anti-counterfeiting label.
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