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Reversible thermochromic anti-counterfeit paper

A technology for thermochromic and anti-counterfeiting paper, applied in the field of anti-counterfeiting paper, can solve the problems of incomplete discoloration, slow discoloration, and intolerant of aging, and achieve the effects of fast discoloration, low cost, and uniform particle size

Inactive Publication Date: 2011-09-21
陈铨荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Most of the existing temperature-changing anti-counterfeiting papers have disadvantages such as aging resistance, slow discoloration (low sensitivity) and incomplete discoloration.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The present invention will be further described below in conjunction with specific examples.

[0018] The reversible thermochromic anti-counterfeiting paper is coated with a thermochromic paint on the paper, and the thermochromic paint is formed by mixing thermochromic capsules, fillers and sizing materials in a weight ratio of 10-20:60-70:15-18, wherein Thermochromic capsules include a solvent, an organic chromogenic agent, a chromogenic agent, an emulsifier, and a shell material. The organic chromogenic agent and chromogenic agent are dissolved in an organic solvent, and the emulsifier is added to disperse to the required particle size, and then the shell material is added. into microcapsules, wherein the emulsifier is maleic anhydride styrene.

[0019] Further, the thermochromic coating is pressed at 2-5g / m 2 Apply to paper.

[0020] On the basis of Example 1, further, the solvent is selected from cetyl alcohol, myristyl alcohol, lauryl alcohol, lauric acid or stea...

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PUM

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Abstract

The invention provides reversible thermochromic anti-counterfeit paper. Thermochromic coatings are coated on the paper. The anti-counterfeit paper is characterized in that the thermochromic coatings are formed by mixing thermochromic capsules, fillers and sizing in a weight ratio of (10-20): (60-70): (15-18), wherein the thermochromic capsules comprise a solvent, an organic color former, a color-developing agent, an emulsifying agent and a shell material; the organic color former and the color-developing agent are added to the organic solvent to be dissolved, the emulsifying agent is added and the shell material is added after the mixture is dispersed to the needed granularity to prepare the microcapsules; and the emulsifying agent is maleic anhydride-styrene. The anti-counterfeit paper has the characteristics of aging resistance, fast color change (high sensitivity), thorough color change, rich color, difficulty in counterfeiting, low cost and the like.

Description

technical field [0001] The invention relates to an anti-counterfeiting paper, in particular to a reversible thermochromic anti-counterfeiting paper. Background technique [0002] Reversible thermochromic paper refers to anti-counterfeiting paper that can change color when the ambient temperature changes. [0003] Thermochromic anti-counterfeiting paper has the characteristics of easy identification, difficult forgery and low cost, and is very suitable for anti-counterfeiting of products such as bills and trademarks. However, the current watermark anti-counterfeiting, fluorescent ink anti-counterfeiting, colored fiber anti-counterfeiting, and laser holographic anti-counterfeiting have great limitations (such as expensive, forged, etc.) in bill printing and trademark printing. [0004] The temperature-changing paint prepared by a certain proportion of thermochromic materials is coated on the surface of paper, after coating, drying, calendering, and cutting, it is used for pri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/40
Inventor 陈铨荣
Owner 陈铨荣
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