Water vapor-sensitive color change ink and humidity-sensitive anti-counterfeit label

A technology of color-changing ink and anti-counterfeiting label, applied in the field of ink, can solve the problems that humidity indicating ink is difficult to print, unfriendly, and anti-counterfeiting color-changing ink can only be screen-printed, etc., and achieves the effect of easy printing and wide application.

Inactive Publication Date: 2017-10-24
XIAMEN LUSHAN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a water vapor-sensitive color-changing ink, which can not only solve the problem that the humidity indicating ink is not friendly to the human body, but also solve the problem that the humidity indicating ink is difficult to print
[0009] The invention also provides a moisture-sensitive anti-counterfeit label, which can not only solve the problem that the anti-counterfeit color-changing ink can only be screen-printed, but also solve the problem that the anti-counterfeit color-changing ink relies on liquid water

Method used

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  • Water vapor-sensitive color change ink and humidity-sensitive anti-counterfeit label
  • Water vapor-sensitive color change ink and humidity-sensitive anti-counterfeit label

Examples

Experimental program
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Effect test

Embodiment 1

[0049] The first step: prepare the salt solution; dissolve 3g of sodium carbonate into 5g of water, stir until it is completely dissolved, and make a colorless first solution.

[0050] Step 2: prepare a pH indicator solution; dissolve 1 g of thymol blue into 3 g of absolute ethanol, stir until it is completely dissolved, and prepare a yellow second solution.

[0051] The third step: prepare the mixed solution; mix the first solution and the second solution to obtain the third blue-green solution.

[0052] Step 4: Prepare the ink; add 5 g of associative polyurethane thickener with a neutral pH value to the third solution, and stir evenly to prepare a water vapor sensitive ink.

[0053] After the ink is printed and dried, it turns yellow. When you breathe into the ink, the water content of the ink increases, and its color changes from yellow to grass green. When the ink loses the water of crystallization, the ink turns yellow again.

Embodiment 2

[0055] The first step: prepare the salt solution; dissolve 3g of potassium carbonate into 10g of hot water, stir until it is completely dissolved, and make a colorless first solution.

[0056] Step 2: prepare a pH indicator solution; dissolve 1 g of cresyl red into 3 g of absolute ethanol, stir until it is completely dissolved, and prepare a yellow second solution.

[0057] The third step: preparing a mixed solution; mixing the first solution and the second solution to obtain a red third solution.

[0058] Step 4: Prepare the ink; add 5 g of associative polyurethane thickener with a neutral pH value to the third solution, and stir evenly to make a water vapor sensitive ink.

[0059] The ink is yellow after printing and drying. When you breathe into the ink or apply water, the water content of the ink increases, and its color changes from yellow to red. When the ink loses the water of crystallization, the ink turns yellow again.

Embodiment 3

[0061] The first step: prepare the salt solution; dissolve 3g of sodium carbonate into 10g of hot water, stir until it is completely dissolved, and make a colorless first solution.

[0062] The second step: preparing a pH value indicator solution; dissolving 1 g of phenolphthalein into 3 g of absolute ethanol, and stirring until it is completely dissolved to prepare a colorless second solution.

[0063] Step 3: Prepare a mixed solution; mix the first solution with the second solution to obtain a pink third solution.

[0064] Step 4: Prepare the ink; add 5 g of hydroxypropyl cellulose with a neutral pH value to the third solution, stir until it is completely dissolved, and make a water vapor sensitive ink.

[0065] The ink is colorless after printing and drying. When you breathe into the ink or apply water, the water content of the ink increases, and its color changes from colorless to pink. When the ink loses its crystallization, the ink becomes colorless again.

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PUM

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Abstract

The invention discloses a water vapor-sensitive color change ink, which is prepared from a water-sensitive salt, a pH indicator, a binder and a solvent. The invention also discloses a humidity-sensitive anti-counterfeit label, comprising an indicating layer, a base layer, a stripping layer and a first adhesive layer which can be attached to a product, wherein the indicating layer is formed on the base layer, the adhesive layer is arranged on the first adhesive layer, and the stripping layer is arranged on the first adhesive layer; the indicating layer is formed by ink printing, and the ink is prepared from the water-sensitive salt, the pH indicator, the binder and the solvent. The invention can not only solve the problem that the humidity indicating ink is not friendly to a human body, but also can solve the problem that the humidity indicating ink is hard to print, and can not only solve the problem that anti-counterfeiting color change ink can only be screen-printed, but also can solve the problem that the anti-counterfeiting color change ink depends on liquid water.

Description

technical field [0001] The invention relates to the technical field of inks, in particular to a water vapor-sensitive color-changing ink and a moisture-sensitive anti-counterfeiting label. Background technique [0002] At present, a large number of cobalt chlorides are used in the market to prepare humidity indicators. Cobalt chloride can absorb water vapor in the air under a certain humidity environment to form cobalt chloride hexahydrate, which is blue, and loses crystal water in a dry environment. It is pink. People can more accurately judge the humidity in the environment through the color of cobalt chloride. However, cobalt chloride is a strong carcinogen and is banned from use in the European Union. [0003] In addition, in the aqueous solution, cobalt chloride is combined with 6 water molecules through hydrogen bonds, while in the water-based system ink, water is used as a solvent to combine with pigments, binders and other components through hydrogen bonds to form ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/50C09D11/102C09D11/14C09J7/02G09F3/02
CPCG09F3/0294C09D11/102C09D11/14C09D11/50C09J2475/00C09J2433/00C09J2203/338C09J2203/334C09J2301/302
Inventor 颜爱国张飞宋国强
Owner XIAMEN LUSHAN NEW MATERIAL TECH
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