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Concealed fluorescent anti-counterfeiting ink as well as preparation method and application thereof

An anti-counterfeiting ink, concealed technology, applied in the direction of ink, application, household appliances, etc., can solve the problem of low anti-counterfeiting level, achieve the effect of improving the anti-counterfeiting level and enhancing the difficulty of counterfeiting

Inactive Publication Date: 2020-12-29
GUANGDONG IND TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the fluorescent anti-counterfeiting inks reported now use fluorescent substances with relatively stable luminescence performance as the technical point to develop fluorescent inks that can be used for anti-counterfeiting. Although this technology is quite mature, most of the anti-counterfeiting features are directly fluorescing under ultraviolet light. The level is low, so there is an urgent need for an anti-counterfeiting ink with a higher level of anti-counterfeiting in the market

Method used

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  • Concealed fluorescent anti-counterfeiting ink as well as preparation method and application thereof
  • Concealed fluorescent anti-counterfeiting ink as well as preparation method and application thereof
  • Concealed fluorescent anti-counterfeiting ink as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In terms of mass percentage, dissolve 0.02g fluorescein in a mixed solvent of 3.0g ethanol, 1.88g isopropanol and 2g n-butanol, stir at room temperature for half an hour, then place it with 3.0g polyurethane resin and 0.1g wax powder Add an appropriate amount of glass beads for ink preparation to the ink sample preparation iron tank, seal the seal and disperse with a shaker at room temperature for half an hour, and filter the resulting solution with a 300-mesh screen to obtain a concealed fluorescent anti-counterfeiting ink.

[0025] The obtained concealed fluorescent anti-counterfeiting ink is drawn on a transparent polyethylene plastic film, and a sample film is obtained after drying. figure 1 The sample film after drying is under the irradiation of a) natural light, b) ultraviolet light 250nm and c) ultraviolet light 365nm respectively, and the sample film after adding alkali is respectively irradiated by d) natural light, e) ultraviolet light 250nm and f) ultraviolet...

Embodiment 2

[0027] In terms of mass percentage, dissolve 0.01g of fluorescein in a mixed solvent of 2.0g of ethanol, 3.39g of isopropanol and 2g of n-butanol, stir at room temperature for half an hour, and place it with 2.5g of polyurethane resin and 0.1g of wax powder. Add an appropriate amount of glass beads for ink preparation to the ink sample preparation iron tank, seal the seal and disperse with a shaker at room temperature for half an hour, and filter the resulting solution with a 300-mesh screen to obtain a concealed fluorescent anti-counterfeiting ink. The obtained ink is drawn on a transparent polyethylene plastic film, and a sample film is obtained after drying.

[0028] The color development of the film obtained in this example before and after adding alkali is similar to Example 1 under natural light and ultraviolet light.

Embodiment 3

[0030] In terms of mass percentage, dissolve 0.02g fluorescein in a mixed solvent of 3.0g ethanol, 2.88g isopropanol and 2g n-butanol, stir at room temperature for half an hour, then place it with 2.0g polyurethane resin and 0.1g wax powder Add an appropriate amount of glass beads for ink preparation to the ink sample preparation iron tank, seal the seal and disperse with a shaker at room temperature for half an hour, and filter the resulting solution with a 300-mesh screen to obtain a concealed fluorescent anti-counterfeiting ink. The obtained ink is drawn on a transparent polyethylene plastic film, and a sample film is obtained after drying.

[0031] The color development of the film obtained in this example before and after adding alkali is similar to Example 1 under natural light and ultraviolet light.

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Abstract

The invention belongs to the technical field of fluorescent anti-counterfeiting ink, and particularly discloses concealed fluorescent anti-counterfeiting ink as well as a preparation method and application thereof. The concealed fluorescent anti-counterfeiting ink comprises the following components in percentage by mass: 0.1%-0.3% of a fluorescein derivative, 20%-30% of a resin, 68%-75% of a solvent and 1%-5% of an auxiliary agent. A sample film prepared from the printing ink can improve the anti-counterfeiting level of a product, does not emit light under natural light or ultraviolet light, and emits light only after being stimulated to a certain extent. The detection means is hidden, the counterfeiting difficulty is greatly enhanced, the common fluorescent ink in the industry directly emits fluorescence under an ultraviolet lamp, and a counterfeiter can relatively easily detect and imitate the fluorescent ink.

Description

technical field [0001] The invention belongs to the technical field of fluorescent anti-counterfeiting inks, in particular to a concealed fluorescent anti-counterfeiting ink and its preparation method and application. Background technique [0002] In recent years, driven by economic interests, counterfeiting activities have been rampant, and a large number of counterfeit and shoddy products have emerged, seriously damaging the interests of consumers and businesses. Therefore, anti-counterfeiting technology has become increasingly important, and anti-counterfeiting inks occupy a very important position in the field of anti-counterfeiting technology. Position, anti-counterfeiting ink is a kind of functional ink, which refers to the special printing ink that is processed and manufactured by adding anti-counterfeiting materials with special properties into the ink resin binder. Anti-counterfeiting inks mainly include: photochromic (photosensitive) anti-counterfeiting ink, fluore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/50C09D11/102C09D11/03
CPCC09D11/50C09D11/102C09D11/03
Inventor 吴姗姗向华丘静静黄舒容林华美张玮鑫
Owner GUANGDONG IND TECHN COLLEGE
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