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An optical interference color-changing anti-counterfeiting film with variable saturation and its manufacturing method

An optical interference and production method technology, applied in optics, optical components, printing and other directions, can solve the problems of increasing the difficulty of the production process, failing to achieve mass detection, increasing the cost of product printing, etc. low cost effect

Active Publication Date: 2016-08-17
襄阳金飞环彩色包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in this way, it not only increases the difficulty of the production process, but also needs to rely on other detection tools in the detection means, which cannot achieve the purpose of mass detection, and also increases the printing cost of the product

Method used

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  • An optical interference color-changing anti-counterfeiting film with variable saturation and its manufacturing method
  • An optical interference color-changing anti-counterfeiting film with variable saturation and its manufacturing method
  • An optical interference color-changing anti-counterfeiting film with variable saturation and its manufacturing method

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A method for making an optical interference color-changing anti-counterfeiting film with variable saturation, comprising the following steps: using a PET film with a thickness of 50 μm as a flexible substrate, first ultrasonicating the PET substrate in deionized water and alcohol for 10 minutes, and then using Rinse with deionized water repeatedly to ensure that the substrate is clean; use radio frequency magnetron sputtering, evaporation or atomic layer deposition to sequentially plate a reflective metal layer 2, a dielectric layer 3 and a semi-transmissive metal layer 4 on the PET substrate .

[0031] The material of the dielectric layer 3 is Al with a thickness of 80-120nm 2 o 3 (refractive index 1.76), to achieve the control of the color hue angle, so that the reflected light color of the film appears blue.

[0032] The semi-transmissive metal layer 4 is chromium with a thickness of 4-7nm, and is used to control the color saturation.

[0033] The reflective metal...

Embodiment 2

[0035] A method for making an optical interference color-changing anti-counterfeiting film with variable saturation, comprising the following steps: using a PET film with a thickness of 50 μm as a flexible substrate, first ultrasonicating the PET substrate in deionized water and alcohol for 10 minutes, and then using Rinse with deionized water repeatedly to ensure that the substrate is clean; use radio frequency magnetron sputtering, evaporation or atomic layer deposition to sequentially plate a reflective metal layer 2, a dielectric layer 3 and a semi-transmissive metal layer 4 on the PET substrate .

[0036] The material of the dielectric layer 3 is Al with a thickness of 160-240nm 2 o 3 (refractive index 1.76), to achieve the control of the color hue angle, so that the color of the reflected light of the film appears yellow.

[0037] The semi-transmissive metal layer 4 is chromium with a thickness of 4-7nm, and is used to control the color saturation.

[0038] The reflec...

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PUM

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Abstract

The invention relates to a variable saturation optical interference radiochromic anti-counterfeit film and a preparation method thereof and belongs to the field of cigarette packet anti-counterfeit technologies. The variable saturation optical interference radiochromic anti-counterfeit film comprises a flexible substrate and a reflective anti-counterfeit film stack plated on the flexible substrate. The anti-counterfeit film stack is composed of metal and a dielectric film layer, and the saturation of reflected light colors of the anti-counterfeit film stack changes from small to large along with incident angles and is different from color hue angle changes of existing anti-counterfeit film stacks. According to the variable saturation optical interference radiochromic anti-counterfeit film, the color hue of the anti-counterfeit film does not change but the saturation of the anti-counterfeit film changes by controlling materials and thickness parameters of the anti-counterfeit film through design and adjustment of different layers, so the effect of color change is achieved, and identification by consumers is facilitated.

Description

technical field [0001] The present invention relates to an anti-counterfeiting film and its manufacturing method, in particular to an optical interference color-changing anti-counterfeiting film with variable saturation characteristics and its manufacturing method. The manufactured anti-counterfeiting color-changing film is easier to be identified by consumers, thereby achieving the purpose of anti-counterfeiting The invention belongs to the technical field of cigarette pack anti-counterfeiting. Background technique [0002] Optical interference photochromic film is designed according to the principle of optical interference of multilayer composite film. When light is incident on the anti-counterfeiting film structure, due to the different combinations of physical parameters such as the material properties and thickness of each layer of film, the light of different wavelengths will appear interference constructive and destructive. When viewed from different angles, you can s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B1/00B42D25/30G09F3/02
Inventor 李双劲李爱国龙锋李修陈思涛李天松黄敏
Owner 襄阳金飞环彩色包装有限公司