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Safety film with dynamic three-dimensional effect

A technology of three-dimensional effect and security film, which is applied in the field of anti-counterfeiting, can solve the problems of low yield, decrease of contrast, increase of mass production cost, etc., and achieve the effect of small film thickness

Active Publication Date: 2010-10-06
SVG TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems of this method are: (1) the micro-printing method requires multiple processes, which increases the cost of mass production; (2) because the characteristic size of the general micro-graphics is less than 2 microns, the general printing ink particles are more than tens of microns , so special nano-inks with a particle size below the micron level are required to fill into the groove; (3) In order to ensure a certain contrast between the filled ink and the background, there must be enough ink to be filled into the groove, so the groove There must be a certain depth, generally greater than 1 micron. The manufacture of a large aspect ratio stencil has certain technical difficulties, and it will also bring about the difficulty of releasing the UV glue during the batch copying process of UV imprinting.
Some of the above problems will lead to disadvantages such as decreased contrast and low yield

Method used

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  • Safety film with dynamic three-dimensional effect
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  • Safety film with dynamic three-dimensional effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Embodiment one: see attached figure 1 Shown is a schematic structural diagram of a security film with a dynamic three-dimensional effect. The film has a three-layer structure: substrate layer 1, microlens array layer 2 and micro-nano structured layer 3. There is a micro-nano structure 5 on the micro-graphic layer, and the micro-nano structure 5 forms a micro graphic unit 6 .

[0062] The thickness of the substrate layer 1 is between 10 microns and 5 mm, and preferably the thickness of the substrate layer is between 25 microns and 100 microns. The material of the substrate layer can be PC, PVC, PET, PMMA, UV-sensitive glue or BOPP, etc., preferably, PET.

[0063] The microlens 4 is used to focus light on the micrographic layer 3, and its shape can be hemispherical or ellipsoidal, and its aperture size is 10 to 500 microns, and the preferred microlens 4 aperture size is 25 to 100 microns. The numerical aperture of the microlens is 0.1-4.0, preferably, the numerical ape...

Embodiment 2

[0066] Embodiment two: see attached figure 2 Shown is a structural schematic diagram of a multi-layer security film with a dynamic three-dimensional effect. Can respectively have microlens array protection layer 21, additional layer 22 and 23 and outside microlens array layer 2, substrate layer 1 / microlens array layer 2, substrate layer 1 / micrographic layer 3 and micrographic layer 3 outside Micro-nano structure protection layer 24 . The additional layers 22, 23 and the protective layers 21, 24 can be dielectric layers, metal layers, or coated with ink, fluorescent, magnetic, phosphorous, selective absorption, or have micro-nano structures.

[0067] Accompanying drawing 3 is the schematic diagram showing the effect of a security film with a dynamic three-dimensional effect in Embodiment 1 and Example 2 of the present invention. The security film as described in the first and second examples of the present invention can enlarge the structure originally hidden in the micropat...

Embodiment 3

[0069] Embodiment 3: Refer to Fig. 5 for a schematic example of a regularly arranged microlens array and a microstructure array. The ratio of the area where the microlens is located to the total area is called the duty cycle. The higher the duty cycle, the higher the contrast of the enlarged graphics obtained. Such as Figure 5a The orthogonal array of microlens arrays shown has a duty cycle of 78%, as Figure 5b The shown honeycomb array of microlenses has a duty cycle of up to 90%.

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Abstract

The invention discloses a safety film with a dynamic three-dimensional effect, which comprises a microlens array layer, a substrate layer and a micro graphic layer. The micro graphic layer comprises at least six micro-graphics; and when the safety film is used, the micro graphic layer is arranged near the focal plane of the microlens array layer. The safety film is characterized in that the central coordinates of each microlens in the microlens array layer are distributed at random in the microlens array layer, and the microlenses in the microlens array layer correspond to the micro-graphics in the micro graphic layer. Due the use of the Moore amplification technology and the microlenses, the invention realizes multiple unique visual effects, reduces the process flow, and can be directly manufactured on the PET, PMMA, PC and other organic film materials in addition to ultraviolet imprinting. Moreover, the safety film has high performance.

Description

technical field [0001] The invention relates to the field of anti-counterfeiting technology, in particular to a safety film, which can be used for screening banknotes, securities, certificates, cards, labels, packages and other paper documents with a risk of forgery. Background technique [0002] Counterfeit banknotes, securities, certificates, cards, labels, packaging, etc. have caused great losses and harm to people's production and life, and even threatened national security. People spend a lot of time and energy researching new security technologies, verifying the authenticity of data carriers, and preventing counterfeiting and production. [0003] Technologies fall into three main categories: Mass, Teller, and Specialist. The characteristic of mass technology is that under normal conditions, without the aid of any instrument, features can be directly identified with the naked eye or sensory organs, which is most easily recognized by the general public, so it is particu...

Claims

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Application Information

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IPC IPC(8): B42D15/00B32B33/00B41M3/06
Inventor 申溯陈林森浦东林周小红胡进魏国军吴智华朱鹏飞
Owner SVG TECH GRP CO LTD
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