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Printing ink with multiple anti-counterfeiting effects as well as preparation method and application of printing ink

A kind of ink and multi-layer technology, applied in the field of new multi-mode and multiple anti-counterfeiting, can solve the problems of small application range, complicated production process, single anti-counterfeiting mode/effect, etc., and achieve the effect of huge application potential, simple process and low cost

Active Publication Date: 2022-07-01
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main anti-counterfeiting inks include the following categories: temperature-sensitive color-changing anti-counterfeiting inks, fluorescent anti-counterfeiting inks, photosensitive color-changing anti-counterfeiting inks, etc. These mainstream anti-counterfeiting inks generally have anti-counterfeiting modes / effects that are relatively single, and the production process is too complicated or the scope of application is small. and other shortcomings

Method used

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  • Printing ink with multiple anti-counterfeiting effects as well as preparation method and application of printing ink
  • Printing ink with multiple anti-counterfeiting effects as well as preparation method and application of printing ink
  • Printing ink with multiple anti-counterfeiting effects as well as preparation method and application of printing ink

Examples

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preparation example Construction

[0040] The present invention also provides a method for preparing the ink with multiple anti-counterfeiting effects described in the above technical solution, comprising the following steps:

[0041] a) mixing molecules with macroscopic co-assembly ability, organic chiral dopants, inorganic light-emitting materials and solvents to obtain a mixed solution;

[0042] b) vacuum drying the mixed solution obtained in step a) to remove the solvent to obtain an ink with multiple anti-counterfeiting effects.

[0043]The present invention firstly mixes molecules with macroscopic co-assembly ability, organic chiral dopant, inorganic light-emitting material and solvent to obtain a mixed solution. In the present invention, the molecules with macroscopic co-assembly ability, organic chiral dopants, and inorganic light-emitting materials are the same as those in the above technical solutions, and will not be repeated here.

[0044] In the present invention, the solvent is preferably one or ...

Embodiment 1

[0063] 0.320g of organic chiral dopant S811, 0.040g of high-quality quantum dots and 0.600g of 4'-n-pentyl-4-cyanobiphenyl, a molecule with macroscopic co-assembly ability, were added to the open sample bottle in turn, and then Organic solvent toluene 1.0mL, ultrasonic for 15min to completely mix the components to form a uniform and transparent solution, then put the sample into a vacuum drying oven, slowly evaporate the solvent at 40 ℃ for 18h, and finally cool to room temperature to obtain a multi-information anti-counterfeiting effect of ink.

[0064] After testing, the clearing point transition temperature of the ink with the multi-information anti-counterfeiting effect provided in Example 1 of the present invention is 14.0°C, a blue structural color can be observed at 0.0-14.0°C, and the color changes to blue-violet when observed at 45°C. When a polarizer is added, the structural color disappears, and when an excitation light of 365 nm is applied, green fluorescence is em...

Embodiment 2

[0066] 0.300g of organic chiral dopant S811, 0.040g of high-quality quantum dots and 0.600g of 4'-n-pentyl-4-cyanobiphenyl, a molecule with macroscopic co-assembly ability, were added to the open sample bottle in turn, and then Organic solvent toluene 1.0mL, ultrasonic for 15min to completely mix the components to form a uniform and transparent solution, then put the sample into a vacuum drying oven, slowly evaporate the solvent at 40 ℃ for 18h, and finally cool to room temperature to obtain a multi-information anti-counterfeiting effect of ink.

[0067] After testing, the clearing point transition temperature of the ink with multi-information anti-counterfeiting effect provided by Example 2 of the present invention is 18.0 ° C, a green structural color can be observed at 0.0-18.0 ° C, and the color changes to indigo cyan when observed at 45 ° C. When the polarizer is used, the structural color disappears, and when an excitation light of 365 nm is applied, green fluorescence i...

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Abstract

The invention provides ink with multiple anti-counterfeiting effects. The ink is prepared from the following raw materials in parts by weight: 3 parts of molecules with macroscopic co-assembly capability; 1-2 parts by weight of an organic chiral dopant; 0.1 part by weight to 0.3 part by weight of an inorganic luminescent material; and the inorganic luminescent material is a high-quality II-VI group quantum dot or a high-quality III-V group quantum dot. Compared with the prior art, the ink with multiple anti-counterfeiting effects provided by the invention adopts components with specific content, realizes relatively good overall interaction, has selectively reflective structural colors, can observe different effects under left and right polaroids respectively, can emit circularly polarized fluorescence under the excitation of ultraviolet light (such as a 365nm ultraviolet lamp), and has the advantages of high anti-counterfeiting effect, high anti-counterfeiting effect and the like. The fluorescent light has a large asymmetric factor, can present an obvious brightness difference under a left / right polaroid, and can respond to temperature change to lose structural color, and in addition, an obvious blue shift phenomenon can be observed along with inclination of an observation angle.

Description

technical field [0001] The invention relates to the technical field of novel multimodal and multiple anti-counterfeiting, and more particularly, to an ink with multiple anti-counterfeiting effects, and a preparation method and application thereof. Background technique [0002] Anti-counterfeiting technology plays an indispensable role in effectively dealing with the problem of counterfeiting and protecting people's lives and property. [0003] Among the many classifications of anti-counterfeiting technology, anti-counterfeiting ink and its application have broad market prospects. At present, the main anti-counterfeiting inks include the following categories: temperature-sensitive color-changing anti-counterfeiting inks, fluorescent anti-counterfeiting inks, photochromic anti-counterfeiting inks, etc. These mainstream anti-counterfeiting inks generally exist because the anti-counterfeiting mode / effect is relatively simple, the production process is too complicated or the scop...

Claims

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Application Information

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IPC IPC(8): C09D11/50C09D11/03
CPCC09D11/50C09D11/03
Inventor 庄涛涛郭启
Owner UNIV OF SCI & TECH OF CHINA
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