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Luminescent anti-counterfeiting element, detection method and detection system thereof

A technology of anti-counterfeiting components and detection methods, which is applied in the direction of material excitation analysis, ink, household appliances, etc., can solve the problems of increasing the detection complexity of luminescent anti-counterfeiting components, the test results are not very accurate, and it is not good for high-end anti-counterfeiting, and achieve good chemical stability Sex and thermal stability, conducive to authenticity detection, rapid detection effect

Active Publication Date: 2021-06-01
CHINA BANKNOTE PRINTING & MINTING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, since visible light can make the rare earth-doped alkaline earth metal sulfides store the absorbed light energy, this type of light-stimulated luminescent material can easily absorb light energy from the ambient light source and store it. , the phenomenon of luminescence can be observed by exciting this type of material with an infrared light source, which is difficult to distinguish from ordinary infrared light up-conversion luminescent materials, so the test results are not very accurate simply relying on the light-excited luminescence characteristics.
Therefore, in order to improve the concealment of anti-counterfeiting, it is often necessary to detect thermally stimulated luminescence of materials to confirm each other, which increases the complexity of detection of luminous anti-counterfeiting components and is not conducive to the realization of high-end anti-counterfeiting
[0009] With the continuous improvement of anti-counterfeiting standards, how to provide a luminescent anti-counterfeiting component that can be easily detected and has high concealment, and realize high-end anti-counterfeiting is a problem to be solved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] References "Xia Liu, Jiahua Zhang, Xia Zhang et al. Strongly enhancing photostimulated luminescence by doping Tm 3+ in Sr 3 SiO 5 :Eu 2+ .Optics Letters, 2013,38(2):148-150. "The method described in the synthesis of light-excited luminescent material Sr 2.9896 SiO 5 :0.01Eu 2+ ,0.0004Tm 3+ , and grind to a suitable particle size.

[0100] Will Sr 2.9896 SiO 5 :0.01Eu 2+ ,0.0004Tm 3+ The powder is made into fibers through a spinning process and added to the polypropylene spinning stock solution with a filling ratio of 5-10%. Through the melt spinning process, the spun fibers containing light-excited luminescent materials are obtained, and the spun fibers ( Filament) cut to the fiber required for papermaking.

[0101] During the papermaking process, the above-mentioned fibers are added to the slurry and mixed evenly, and the finally obtained paper contains randomly distributed spinning fibers containing light-excited luminescent materials.

[0102] Alternative...

Embodiment 2

[0104] References "Wang Zhilong, Zheng Guisen, Wang Shiqin et al. New electron-trapping optical storage material Sr 2 SnO 4 :Sb 3+ Study on the luminescence properties of . Acta Physica Sinica, 2012,61(12):511-516. "Synthesis of light-excited luminescent material Sr 2 SnO 4 :0.5%Sb 3+ , and grind to a suitable particle size.

[0105] Will Sr 2 SnO 4 :0.5%Sb 3+ The powder is added to the offset printing ink system and mixed evenly. The formulation of the offset printing ink system is shown in Table 1 below.

[0106] The prepared offset printing ink is printed on paper through an offset printing machine to obtain a colorless printed product.

[0107] Table 1

[0108] component name Quality score (%) Phenolic Resin 30 Polyurethane Modified Alkyd Resin 23 calcium carbonate 25 wax 2 Photostimulated Luminescent Materials 16 mineral oil 2 desiccant 2

Embodiment 3

[0110] References "Xia Liu, Jiahua Zhang, Xia Zhang et al. Strongly enhancing photostimulated luminescence by doping Tm 3+ in Sr 3 SiO 5 :Eu 2+ Sr 2.9896 SiO 5 :0.01Eu 2+ ,0.0004Tm 3+ , and grind to a suitable particle size.

[0111] Will Sr 2.9896 SiO 5 :0.01Eu 2+ ,0.0004Tm 3+ The powder is added to the gravure ink system, and the formula of the offset ink system is shown in Table 2 below:

[0112] Table 2

[0113] material name Quality score (%) Phenolic Resin 30 Polyurethane Modified Alkyd Resin 25 calcium carbonate 20 wax 5 Photostimulated Luminescent Materials 16 Surfactant 2 desiccant 2

[0114] The above gravure printing ink is printed on paper through a gravure printing machine to obtain a colorless printed product.

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Abstract

The invention provides a luminescent anti-counterfeiting element, a detection method and a detection system thereof. The light-emitting anti-counterfeiting element has the following light-emitting characteristics: the light-emitting anti-counterfeiting element is irradiated by the first excitation light, and after the first excitation light is removed, when it is further irradiated by the second excitation light, it produces second emission light visible to the naked eye; the light-emitting anti-counterfeiting element When not irradiated by the first excitation light in advance, when directly irradiated by the second excitation light, a third emission light invisible to the naked eye is produced; wherein, the wavelength of the second excitation light is greater than the wavelength of the first excitation light, and the wavelength of the second excitation light greater than the wavelength of the second emitted light. Since the luminous anti-counterfeit element provided by the present invention has the above-mentioned unique luminous effect, it has the characteristics of convenient detection and high concealment. The invention also provides a detection method and a detection system for the above-mentioned luminescent anti-counterfeiting element.

Description

technical field [0001] The invention relates to a luminous anti-counterfeit element, a detection method and a detection system thereof, and belongs to the technical field of security and anti-counterfeit. Background technique [0002] Anti-counterfeiting technical means based on luminescent materials have a long history. At present, luminescent materials conforming to the Stokes effect, such as luminescent materials that emit visible light or infrared light excited by ultraviolet or visible light, and luminescent materials that meet the Anti-Stokes effect, such as infrared light upconversion luminescence Materials, whether in high-end currency anti-counterfeiting or general printing anti-counterfeiting products (stamps, various tickets, certificates, etc.), have been widely used. However, with the popularization of material applications, it is becoming more and more easy for counterfeiters to obtain the above-mentioned materials, and some anti-counterfeiting technologies ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/63C09D11/50
CPCC09D11/50G01N21/63
Inventor 麻宝成张晓明唐士立邬立勇陈国栋辛小温周树荣朱强
Owner CHINA BANKNOTE PRINTING & MINTING
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