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Anti-counterfeiting ink with delayed fluorescence and application of ink

A delayed fluorescence, anti-counterfeiting ink technology, applied in the fields of chemistry and material science, can solve the problem that the anti-counterfeiting performance of anti-counterfeiting labels needs to be improved, and achieve the effect of fast and convenient information hiding and reading, convenient operation and stable performance

Active Publication Date: 2018-05-25
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example CN1171169C discloses a kind of production method of invisible mark anti-counterfeiting printed matter, this method adopts four polarized self-defined screen dot grayscale images, the mode of dislocation screening is carried out to the different regions of one of the color plates of printed matter, will The anti-counterfeit mark is hidden in the layered anti-counterfeit color plate used to print the invisible mark anti-counterfeit print, but the invisible mark anti-counterfeit print only has a simple hiding function, and the anti-counterfeit performance and the quality of the anti-counterfeit mark made of it still need to be improved

Method used

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  • Anti-counterfeiting ink with delayed fluorescence and application of ink

Examples

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Effect test

preparation example Construction

[0033] In some preferred embodiments, the preparation method of the delayed fluorescent material comprises:

[0034] mixing the first fluorescent material and the silicon dioxide material in a solvent to form a mixed reaction solution,

[0035] The mixed reaction solution is heated to 100-200° C. and reacted for 3-18 hours under the condition of a pressure of 2-4 MPa, and then post-treated to obtain the delayed fluorescent material.

[0036] Further, the first fluorescent material adopts the fluorescent material provided by CN103525402A.

[0037] Preferably, the mass ratio of the first fluorescent material to the silicon dioxide material is 0.5-2.5:25-1250.

[0038] In some embodiments, the preparation method of the delayed fluorescent material comprises:

[0039] dispersing the first fluorescent material in a solvent to form a first fluorescent material dispersion,

[0040] Dispersing the silica material in a solvent to form a silica material dispersion,

[0041] The firs...

Embodiment 1

[0086] Example 1 This example provides an anti-counterfeiting ink with delayed fluorescence, which includes the following raw materials (parts by weight): 100 parts of ethanol, 50 parts of polyvinyl alcohol, 1300 parts of water, and 50 parts of room temperature long-life delayed fluorescent material.

[0087] The preparation method of this delayed fluorescent anti-counterfeiting ink is as follows:

[0088] Disperse 50 parts of room temperature long-life delayed fluorescent material in 100 parts of ethanol, add 300 parts of water to dilute to obtain solution A;

[0089] Dissolve 50 parts of polyvinyl alcohol in 1000 parts of water to obtain solution B;

[0090] After mixing the solutions A and B, put them into a vacuum drying oven and vacuumize at room temperature until the air bubbles in the mixed solution are removed to obtain the anti-counterfeiting ink with delayed fluorescence.

[0091] The preparation method of the aforementioned long-life delayed fluorescent material at...

Embodiment 2

[0106]Example 2 A phosphorescent anti-counterfeiting ink provided in this example contains the following raw materials (parts by weight): 180 parts of ethanol, 23 parts of polyvinyl alcohol, 1100 parts of water, and 1.0 part of the blue fluorescent material disclosed in CN103525402A.

[0107] The preparation method of the anti-counterfeiting ink with phosphorescence is as follows:

[0108] After dispersing 1.0 parts of blue fluorescent material in 180 parts of ethanol, adding 150 parts of water to dilute to obtain a blue fluorescent material dispersion;

[0109] Dissolve 23 parts of polyvinyl alcohol in 950 parts of water to obtain a polyvinyl alcohol solution;

[0110] After mixing the blue light fluorescent material dispersion liquid and the polyvinyl alcohol solution, put it into a vacuum drying oven, and vacuumize at room temperature until the air bubbles in the mixed liquid are removed, so as to obtain the anti-counterfeiting ink with phosphorescence.

[0111] The prepar...

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Abstract

The invention discloses anti-counterfeiting ink with delayed fluorescence. The anti-counterfeiting ink is prepared from a delayed fluorescence material, a dispersion solvent, a water-soluble macromolecular polymer, water and the like. The delayed fluorescence material can emit visible light under ultraviolet excitation and emit delayed fluorescence after ultraviolet excitation. An information hiding and anti-counterfeiting method comprises the steps as follows: the anti-counterfeiting ink with delayed fluorescence forms a first mark containing confidential information; the first mark is coatedwith a second mark containing interference information formed by anti-counterfeiting ink with phosphorescence to form an anti-counterfeiting mark. The anti-counterfeiting mark displays the interference information under ultraviolet irradiation and after irradiation in a dry state and displays the interference information and the confidential information under ultraviolet irradiation and after irradiation in a moisture wet state. Decryption and encryption are realized by use of the principle that the delayed fluorescence material is insensitive to air and vapor and phosphorescence is quenchedunder the effects of air and vapor, operation is convenient, the cost is low, and the anti-counterfeiting performance is excellent and stable.

Description

technical field [0001] The present invention specifically relates to an anti-counterfeiting ink with delayed fluorescence, an anti-counterfeiting system and an anti-counterfeiting method based on the anti-counterfeiting ink, for example, a method for hiding information and anti-counterfeiting marks by using delayed fluorescent ink and phosphorescent ink, which belongs to the technical field of chemistry and material science . Background technique [0002] The key to anti-counterfeiting when printing, hiding and reading anti-counterfeiting information and marks. The ink for printing anti-counterfeiting information or logos is a special printing ink made by adding anti-counterfeiting materials with special properties into the ink binder and processed by a special process. Under special conditions, the visible or invisible signs printed with this ink will change under certain conditions, which is convenient for verification and prevention of counterfeiting. In many fields of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/50
CPCC09D11/50
Inventor 林恒伟蒋凯张凌
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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