Two-dimensional code with multiple anti-counterfeiting features

An anti-counterfeiting feature and two-dimensional code technology, applied in the field of two-dimensional codes, can solve the problems of limited secondary encryption effect of two-dimensional codes

Active Publication Date: 2016-06-15
SUZHOU NANO FOREVER MATERIAL TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conventional color coating itself is still not difficult to imitate, and the secondary encryption effect on the QR code is limited

Method used

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  • Two-dimensional code with multiple anti-counterfeiting features
  • Two-dimensional code with multiple anti-counterfeiting features
  • Two-dimensional code with multiple anti-counterfeiting features

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Embodiment 1, a magenta photonic crystal anti-counterfeiting two-dimensional code with blue-green luster, its preparation includes the following steps:

[0057] (1) By means of emulsion polymerization, a monodisperse magenta polystyrene microsphere emulsion with a diameter of 215 nm and a solid content of 5% was prepared. Concrete preparation method is:

[0058] a. Weigh 0.58g sodium lauryl sulfate, dissolve 0.2g rhodamine 6G in 90ml deionized water, stir at 300r / min in a 250ml three-neck flask, and bubble with nitrogen for 30min;

[0059] b. After the water bath is heated to 85°C and stabilized, add 5g of styrene monomer;

[0060] c. After 15 minutes, add 0.10 g of potassium persulfate and react at 85° C. for 5 hours under stirring and nitrogen protection. The obtained polystyrene nanospheres have a particle size of 215 nm and a PDI of 0.02.

[0061] (2) Mix the magenta monodisperse polystyrene microsphere emulsion obtained in step (1) with absolute ethan...

Embodiment 2

[0065] Embodiment 2, a black photonic crystal anti-counterfeiting two-dimensional code with dark gold luster, its preparation includes the following steps:

[0066] (1) By means of emulsion polymerization, a monodisperse polystyrene microsphere emulsion with a diameter of 225 nm and a solid content of 5% was prepared. Concrete preparation method is:

[0067] a. Weigh 0.52g of sodium lauryl sulfate and dissolve it in 90ml of deionized water, stir at 300r / min in a 250ml three-neck flask, and bubble with nitrogen for 30min;

[0068] b. After the water bath is heated to 85°C and stabilized, add 5g of styrene monomer;

[0069] c. After 15 minutes, add 0.10 g of potassium persulfate and react at 85° C. for 5 hours under stirring and nitrogen protection. The obtained polystyrene nanospheres have a particle size of 225 nm and a PDI of 0.03.

[0070] (2) The monodisperse polystyrene microsphere emulsion obtained in step (1) and the carbon black pigment were compounded at ...

Embodiment 3

[0072] Embodiment 3, a photonic crystal anti-counterfeiting two-dimensional code with a green glossy background color, the preparation of which includes the following steps:

[0073] Take a commercially available silica monodisperse microsphere emulsion with a solid content of 40% (ethanol, water mixed solution dispersion, alcohol water volume ratio 1:1, particle size 192nm, PDI figure 1 Prepare a two-dimensional code embossed printing plate, area 2 is the area of ​​the raised image and text, print and dip the silica microsphere emulsion on the black plastic substrate.

[0074] After printing, the printed matter is placed on a heat carrier at 50°C. After the continuous phase solvent volatilizes, the light-colored pixel matrix area of ​​the two-dimensional code forms a layer of white photonic crystal coating with green luster, and the dark-colored pixel area is formed by the natural color of the black plastic substrate. presented. can be obtained as figure 1 The photoni...

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Abstract

The invention belongs to the field of graph carriers for information storage and transmission and especially relates to a two-dimensional code with multiple anti-counterfeiting features. At least part of a graph layer of the two-dimensional code comprises a photonic crystal material layer. The reflection spectrum of photonic crystal forbidden band light is a single band spectrum and its feature is distinguished so that it is impossible to duplicate the spectrum with common color paints, and therefore the photonic crystal material is quite suitable for expert anti-counterfeiting of instrument detection. Further, the reflection spectrum is bright in color, has high saturation, and has iridescence effect which is visible to naked eye and is angle-dependently changeable so that the photonic crystal material can also be applied for common anti-counterfeiting and technical anti-counterfeiting. Therefore, the security of the two-dimensional code is increased and the two-dimensional code has multiple anti-counterfeiting features so that it can be applied in common anti-counterfeiting, technical anti-counterfeiting and expert anti-counterfeiting.

Description

technical field [0001] The invention belongs to a graphic carrier for storing and transmitting information, in particular to a two-dimensional code with multiple anti-counterfeiting features. Background technique [0002] Two-dimensional code (2-dimensional barcode) is a kind of graphic that records data symbol information with a black and white graphic distributed in a plane (two-dimensional direction) according to certain rules with a specific geometric figure. The name of the two-dimensional code is relative to the one-dimensional code. For example, the previous barcode is a "one-dimensional code". Among the many types of two-dimensional barcodes, the commonly used code systems are: DataMatrix, MaxiCode, Aztec, QRCode, Vericode, PDF417, Ultracode, Code49, Code16K, etc. It can be roughly divided into two categories: 1. Stacked / lined two-dimensional barcodes, such as Code16K, Code49, PDF417, etc. 2. Matrix QR code, the most popular is QRCODE (full name: Quick Response Mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K19/06
CPCG06K19/06037
Inventor 叶常青宋延林温强
Owner SUZHOU NANO FOREVER MATERIAL TECH
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