Composite anti-counterfeiting element and valuable goods provided with the same

A technology for anti-counterfeiting components and components, applied in the direction of processing coins or valuable banknotes, printed matter, identification devices, etc., can solve problems such as application limitations, thermochromism, etc., and achieve the effect of improving the difficulty of counterfeiting and identification

Inactive Publication Date: 2009-05-20
CHINA BANKNOTE PRINTING & MINTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this liquid crystal material requires a certain temperatur

Method used

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  • Composite anti-counterfeiting element and valuable goods provided with the same
  • Composite anti-counterfeiting element and valuable goods provided with the same
  • Composite anti-counterfeiting element and valuable goods provided with the same

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0061] Example 1

[0062] A linear photopolymer LPP is coated on one side of the transparent PET substrate 21 to form an LPP layer 23, and the LPP layer 23 is exposed to polarized light to form an array composed of a plurality of pixel regions, and each pixel region has a predetermined orientation. Then, a cholesteric liquid crystal polymer LCP layer 22 is coated on the LPP layer 23. The liquid crystal molecules in the liquid crystal layer 22 are oriented by the LPP layer 23 and fixed at a specific tilt angle, thereby bringing microscopic optical information. Show the macroscopic optical effect. On the other side of the PET substrate 21, at least some areas are coated with a dark magnetic material layer 24 that exhibits strong absorption of near-infrared electromagnetic waves. The material of the magnetic material layer 24 can be a hard magnetic material or a soft magnetic material. The magnetic material is then coated on the magnetic material layer 24 with an infrared reflective ...

Example Embodiment

[0065] Example 2

[0066] A magnetic material with strong reflection effect on near-infrared electromagnetic waves and a magnetic material with strong absorption effect on near-infrared electromagnetic waves are overprinted on the areas 32 and 33 of the transparent or dark BOPP substrate 31 to form a magnetic material layer, And the two magnetic material layers are formulated into the same color. Then the liquid crystal polymer material layer 34 is printed on the magnetic material layer to form a cross-sectional view of the composite anti-counterfeiting element as Figure 3-1 Shown.

[0067] The magnetic material layer or substrate 31 of the composite element constitutes the dark background of the liquid crystal material layer 34. press Figure 3-1 The direction indicated by the arrow changes the angle of the liquid crystal material surface of the composite element. The composite element is light red when viewed from the front, and light green when viewed from the side. The magnet...

Example Embodiment

[0070] Example 3

[0071] Print a liquid crystal polymer material layer 42 on the transparent PVC substrate 41, and then print a magnetic material that has a strong reflection effect on infrared electromagnetic waves on at least some areas 43 of the liquid crystal polymer material layer 42, and finally coat the entire plate A dark-colored infrared material 44 with strong absorption of near-infrared electromagnetic waves, the cross-sectional view of the composite anti-counterfeiting element formed is as follows Pic 4-1 Shown.

[0072] press Pic 4-1 Observe the composite anti-counterfeiting element in the direction indicated by the arrow, you can see Figure 4-2 As shown in the engraved text, rotate the element to a certain angle, and the text changes from engraved to positive, as Figure 4-3 Shown. Through the magnetic detector, the magnetic encoding feature of the magnetic material in the area 43 can be detected. Observed in the direction indicated by the arrow under an infrared...

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PUM

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Abstract

The invention relates to a compound anti-counterfeiting element, which is provided with at least one liquid crystal material with optical properties, and at least one functional material with machine-readable properties, so that the element simultaneously has the optical properties, machine-readable infrared properties and machine-readable magnetic properties. Combining the optical variable anti-counterfeiting properties for mass recognition, infrared anti-counterfeiting properties for machine-readable recognition, and magnetic properties, the anti-counterfeiting element remarkably improves anti-counterfeiting safety, and has a higher anti-counterfeiting effect and a simpler identification method compared with a single anti-counterfeiting element. The invention also provides a valuable commodity which is provided with the compound anti-counterfeiting element.

Description

technical field [0001] The invention relates to a composite anti-counterfeit element for protecting valuable articles, in particular to a composite anti-counterfeit element which has the functions of public anti-counterfeiting and professional anti-counterfeiting. The invention also relates to a method for producing such a composite security element and to an item of value provided with such a composite security element. Background technique [0002] Due to the continuous popularization of color copiers and imaging systems and the continuous improvement of printing technology, the phenomenon of counterfeiting banknotes, passports and ID cards has increased. For the purpose of preventing counterfeiting and counterfeiting, items of value, such as securities and brand-name products, are frequently provided with security elements in order to verify the authenticity of the item of value and at the same time prevent unauthorized duplication. [0003] In the field of anti-counterf...

Claims

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Application Information

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IPC IPC(8): G02F1/13B42D15/00G06K19/06G07D7/12G09F3/02D21H21/40G07D7/1205
Inventor 刘卫东黄小义柯光明周基炜周乐陈海波
Owner CHINA BANKNOTE PRINTING & MINTING
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