Multi-anti-counterfeiting method and multi-anti-counterfeiting element based on structural color

An anti-counterfeiting element and structural color technology, applied in the field of anti-counterfeiting, can solve the problems of easy imitation of the anti-counterfeiting method and low encryption degree, and achieve the effects of increasing the difficulty of imitation, improving the encryption degree and high resolution.

Pending Publication Date: 2022-08-02
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One purpose of this application is to provide a multiple anti-counterfeiting method based on structural color to solve the technical problems that the anti-counterfeiting methods in the prior art are easy to be imitated and the degree of encryption is low, while reducing production costs, improving stability and environmental performance

Method used

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  • Multi-anti-counterfeiting method and multi-anti-counterfeiting element based on structural color
  • Multi-anti-counterfeiting method and multi-anti-counterfeiting element based on structural color
  • Multi-anti-counterfeiting method and multi-anti-counterfeiting element based on structural color

Examples

Experimental program
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Effect test

Embodiment 1

[0099] (1) Preparation of colloidal microsphere dispersion: 156 nm monodisperse poly(styrene-methacrylic acid) colloidal microspheres and 240 nm monodisperse porous silica colloidal microspheres were dispersed in deionized water, and then placed in a frequency Disperse in a 120Hz ultrasonic disperser for 10min. The porous silica colloidal microsphere dispersion liquid with a concentration of 3% (by mass fraction) and a poly(styrene-methacrylic acid) colloidal microsphere dispersion liquid with a concentration of 10% (by mass fraction) were prepared respectively. .

[0100] (2) The monodisperse poly(styrene-methacrylic acid) colloidal microsphere dispersion is uniformly spray-printed on the polyester fabric within the design range of the first preset pattern by an ink-jet printer, and the polyester fabric is placed at 60° after the spray-printing. Perform drying treatment in an oven at a temperature of Within the design range of the second preset pattern, after spray printing...

Embodiment 2

[0104] (1) Preparation of colloidal microsphere dispersion: 154 nm monodisperse polystyrene colloidal microspheres and 239 nm monodisperse porous silica colloidal microspheres were dispersed in deionized water, and then placed in an ultrasonic disperser with a frequency of 120 Hz Disperse for 10min. The porous silica colloidal microsphere dispersion liquid with a concentration of 3% (by mass fraction) and a poly(styrene-methacrylic acid) colloidal microsphere dispersion liquid with a concentration of 10% (by mass fraction) were prepared respectively. .

[0105] (2) The monodisperse polystyrene colloidal microsphere dispersion liquid is uniformly spray-printed on the paper within the design range of the first preset pattern by an ink-jet printer, and the paper is placed in an oven at 60°C for drying treatment after spray-printing , forming a first photonic crystal, that is, forming a first preset pattern that is invisible under visible light irradiation; then uniformly spray-p...

Embodiment 3

[0109] (1) Preparation of colloidal microsphere dispersion: 156 nm monodisperse poly(styrene-butyl acrylate-methacrylic acid) colloidal microspheres and 240 nm monodisperse porous silica colloidal microspheres were dispersed in deionized water, Afterwards, it was placed in an ultrasonic disperser with a frequency of 120 Hz to disperse for 10 min. The porous silica colloidal microsphere dispersion liquid with a concentration of 3% (by mass fraction) and a poly(styrene-methacrylic acid) colloidal microsphere dispersion liquid with a concentration of 10% (by mass fraction) were prepared respectively. .

[0110] (2) The monodisperse poly(styrene-butyl acrylate-methacrylic acid) colloidal microsphere dispersion is uniformly spray-printed on the polyester fabric within the design range of the first preset pattern by an ink-jet printer. The fabric is dried in an oven at 60°C to form a first photonic crystal, that is, a first preset pattern that is invisible under visible light irrad...

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Abstract

The invention discloses a multi-anti-counterfeiting method and a multi-anti-counterfeiting element based on structural colors. The anti-counterfeiting method comprises the steps that a photonic crystal layer is formed on the surface of an object to be subjected to anti-counterfeiting, the photonic crystal layer at least comprises a first preset pattern and a second preset pattern which are invisible under visible light irradiation, and the first preset pattern serves as a first anti-counterfeiting mark and is composed of a first photonic crystal displaying a first reflection wavelength; the second preset pattern is composed of a second photonic crystal displaying a second reflection wavelength, the second preset pattern and the first preset pattern are complementary to each other and jointly serve as a second anti-counterfeiting mark, and the first reflection wavelength and the second reflection wavelength are different from each other; external stimulation is applied to the photonic crystal layer so that the first preset pattern and the second preset pattern can be sequentially converted into a visible state from an invisible state, the first anti-counterfeiting mark and the second anti-counterfeiting mark can be sequentially displayed, and complete encrypted information can be read after integration. According to the invention, multiple anti-counterfeiting is realized, the imitation difficulty is increased, and the encryption degree is improved.

Description

technical field [0001] The present application relates to the technical field of anti-counterfeiting, in particular to a multiple anti-counterfeiting method and multiple anti-counterfeiting elements based on structural colors. Background technique [0002] Anti-counterfeiting technology is widely used in commodities to identify whether products are counterfeit and counterfeit. In the prior art, anti-counterfeiting is mostly carried out by coating the products with pigments, polymer dots, rare earth metals, etc., but there are generally problems such as poor stability, high cost, high long-term toxicity, easy to be imitated, and low encryption reliability. Their practical application in the fields of textile and clothing. [0003] Responsive photonic crystal structure has broad application prospects in the field of anti-counterfeiting due to its advantages of non-fading and environmental protection. However, the existing anti-counterfeiting technology often only has one piec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M3/14B41M5/00
CPCB41M3/14B41M5/0047
Inventor 张耘箫刘国金金梦婷周岚马万彬柳浩李宇城
Owner ZHEJIANG SCI-TECH UNIV
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