Multifunctional colorful anti-counterfeiting film preparation method based on rotation parameter control

A color film, multi-functional technology, applied in the field of film materials and optical anti-counterfeiting, can solve the problems of high cost of thermochromic materials, strict printing conditions, non-permanent discoloration, etc., to improve appearance performance, long service life, and safety. high effect

Active Publication Date: 2022-01-07
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Photochromic has poor durability and cannot permanently change color; thermochromic materials have high cost and strict printing conditions; in electrochromic glass, organic materials have degradation problems, while inorganic materials take a long time to change color; laser color-changing films have strong anti-counterfeiting properties, Beautiful, resistant to ink corrosion, but poor weather resistance, most PE laser film is not suitable for use in high temperature environments
Most of the above color-changing technologies cannot form dynamic color changes; and their color saturation can hardly be adjusted

Method used

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  • Multifunctional colorful anti-counterfeiting film preparation method based on rotation parameter control
  • Multifunctional colorful anti-counterfeiting film preparation method based on rotation parameter control
  • Multifunctional colorful anti-counterfeiting film preparation method based on rotation parameter control

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preparation example Construction

[0043] see figure 1 , this implementation provides a multifunctional color thin film controlled by rotation parameters and its preparation method, which includes: an interference medium layer, a base layer compounded at the bottom of the interference medium layer, and a surface compounded at the top of the interference medium layer Film layer; wherein, the base layer includes a substrate layer, and a carrier layer attached below the substrate layer; the surface film layer includes a functional layer compounded on the top of the above-mentioned interference medium layer, and will be compounded on the functional layer Protective layer on top. The substrate layer, the interference medium layer and the functional layer together form a cavity-type interference resonance structure.

[0044] The carrier layer is a variety of materials in different scenarios, regardless of thickness. The protective layer provides protection against oxidation and the like for the structure, and adop...

Embodiment 1

[0053] like figure 1 As shown, the rotation parameter-controlled interference unit structure provided in this embodiment includes a carrier layer, a substrate layer, a pre-interference medium layer, a functional layer, and a protective layer in sequence from bottom to top.

[0054] The carrier layer is SiO 2 sheet, regardless of thickness; substrate layer and functional layer are made of Ge 2 Sb 2 Te 5 , the thickness is 5nm and 10nm; the pre-interference medium layer adopts ITO, and the thickness of the pre-interference medium layer is 0-150nm. Except for the pre-interference medium layer, the above other layers are all uniform layers.

[0055] When sputtering the pre-interference medium layer, the rotation angle of the rotating platform is 0°, that is, when sputtering, the rotating platform is stationary.

[0056] Will Figure 4 The interferometric unit structure shown in the three periodic stacking, the structure is as Figure 7 shown. It includes a carrier layer, ...

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Abstract

The invention discloses a multifunctional colorful anti-counterfeiting film preparation method based on rotation parameter control, and relates to the field of film materials and optical anti-counterfeiting. The prepared film comprises an interference dielectric layer, a substrate layer compounded at the bottom of the interference dielectric layer, and a surface film layer compounded at the top of the interference dielectric layer, wherein the substrate layer comprises a base material layer and a carrier layer, and the base material layer is attached to the carrier layer; the surface film layer comprises a functional layer compounded on the top of the interference dielectric layer and a protective layer compounded on the top of the functional layer. By changing the traditional magnetron sputtering preparation process and controlling the period and angle of a turntable during sputtering, the traditional process is changed, the conventional solid-state chip type anti-counterfeiting design is broken through, and the appearance expressive force of the identification is improved; and the sub-wavelength-magnitude thickness also enables the design and application scenarios of the identifier to be more flexible.

Description

technical field [0001] The invention relates to the fields of film materials and optical anti-counterfeiting, in particular to a method for preparing a multifunctional color anti-counterfeiting film based on rotation parameter control. Background technique [0002] Counterfeit and shoddy behaviors seriously disrupt the market order, and it is urgent to adopt high-security anti-counterfeiting measures. Currently the most common anti-counterfeiting technologies of fluorescence and radio frequency identification (RFID) have many problems. With the rapid development of material science, the security of fluorescent anti-counterfeiting technology becomes lower. However, RFID technology has defects such as high cost, poor stability, and short life. Therefore, it is particularly important to explore and prepare a new type of cheap and reliable anti-counterfeiting technology with high security. [0003] In addition, as the pursuit of the color performance of product appearance is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/52
CPCC04B41/52C04B41/009C04B14/06C04B41/5053C04B41/4529C04B41/524C04B41/505C04B41/5027
Inventor 刘富荣陈清远张永志张家威魏文聪李林张露露
Owner BEIJING UNIV OF TECH
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