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Holographic dealuminized composite film material and anti-counterfeiting object

A composite film and dealumination technology, which is applied in the field of anti-counterfeiting and valuable items, can solve the problems of being difficult to apply high-end anti-counterfeiting, limiting the scope of application of holographic films, and single anti-counterfeiting means, so as to retain the effect of holographic patterns and improve the anti-counterfeiting effect , improve the effect of visual effects

Active Publication Date: 2011-10-12
CHINA BANKNOTE PRINTING & MINTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The reflective layer is a necessary structure to provide holographic features, the most commonly used is the aluminum layer, so the current holographic film is not only difficult to make breakthroughs in visual effects, but also with the widespread use of holographic technology, for counterfeiters, Technical barriers are getting weaker
In order to change the stereotyped visual effects and increase the difficulty of counterfeiting, holographic films that have undergone fine dealumination have begun to appear. Since the background of the holographic film after dealumination is transparent, it is attached to the printing surface (substrate) of anti-counterfeiting items such as paper or cards. In fact, the observation result is easily affected by the color of the substrate itself, and the visual effect of this dealuminated holographic film is also affected, thus limiting the scope of application of this holographic film
[0004] In response to this problem, there are also related producers who apply ink on one side of the dealuminated holographic film to form a dark background, but this method has a relatively large impact on the thermal stability of the ink used as the background, the bonding force between the ink and the adjacent structural layer, etc. High requirements will also affect the application range of this holographic film
[0005] On the other hand, even the holographic film obtained through the fine dealumination process only provides a visual effect with the first-line public anti-counterfeiting function with optical change characteristics, that is, the current holographic film still has a relatively simple anti-counterfeiting method. Defects, it is difficult to apply to some high-end anti-counterfeiting products

Method used

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  • Holographic dealuminized composite film material and anti-counterfeiting object
  • Holographic dealuminized composite film material and anti-counterfeiting object
  • Holographic dealuminized composite film material and anti-counterfeiting object

Examples

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Effect test

Embodiment 1

[0033] Figure 2(A) is a common logo after dealumination. Since the film after dealumination is transparent, it is easily affected by the color of the substrate after it is attached to paper or card.

[0034] Fig. 2 (B) and Fig. 2 (C) are respectively the embodiment provided by the present invention, that is, after completing the fine dealumination, the mark made of the electromagnetic functional layer is plated, and the intrinsic metal color of the electromagnetic functional layer itself makes the fine dealumination layer It is more obvious in appearance, easy for the public to identify with naked eyes, and will not destroy the original holographic effect. Since the difference in reflectivity enhances the contrast of the pattern, the details of the fine dealuminated pattern are easier to recognize, such as the letters or numbers on the edge of the fine dealuminated pattern; Figure 2 (C) is a more complex improvement scheme, through the holographic layer. It is realized by part...

Embodiment 2

[0036] Hot stamping anti-counterfeiting labels such as image 3 In the composite structure shown in the figure, a peeling layer 2, a protective layer 3, and a holographic molding layer 4 are sequentially coated on the PET white film (on which a holographic pattern is molded and transferred). Sputtering winding coating process or vacuum evaporation prepare metal or alloy electromagnetic anti-counterfeiting functional layer 12 (such as the amorphous film in the embodiment of CN 200710122026.3 specification) on the hollow aluminum layer 11, and finally coat the hot melt adhesive bonding layer 5 to become Hot stamping anti-counterfeiting label.

[0037] During application, use the hot stamping head to press the label to a certain position on the substrate or the substrate in the direction of the arrow, and tear off the PET film through the peeling layer 2 to complete the hot stamping. The anti-counterfeiting pattern seen at this time can be, for example, Fig. 2 (B) or Fig. 2 (C),...

Embodiment 3

[0039] self-adhesive stickers such as Figure 4 The illustrated composite film material of the present invention is a self-adhesive composite structure layer, and a peeling layer 2 and a holographic molding layer 3 are sequentially coated on the PET white film (the molded transfer has a holographic pattern on it), and finely stripped after aluminum plating. Aluminum treatment, then use magnetron sputtering winding coating process or vacuum evaporation to prepare metal or alloy electromagnetic anti-counterfeiting functional layer 12 (for example, the amorphous film in the embodiment of CN 200710122026.3 specification) on the hollow aluminum layer 11, and finally coat The adhesive layer 5 and the backing paper 7 coated with the silicone resin coating 6 become the self-adhesive label of the present invention. Same as the usual self-adhesive labels, the bonding fastness between the peeling layer 2 and the PET is stronger than that of the above-mentioned hot stamping film. Therefo...

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Abstract

The invention discloses a holographic dealuminized composite film material. The composite film material provides hollow-out dealuminized holographic anti-counterfeiting characteristics with deep metal background, ensures that a holographic aluminum layer is more obvious in appearance and color luster by means of the difference of the reflectivity of a deep metal background layer and the aluminum layer, increases the anti-counterfeiting performance, is easier for the naked eye identification of the public, and improves the visual effect of the prior holographic film through the novel appearance with strong contrast; and the deep metal background layer is an electromagnetic function layer, also provides specific magnetic machine-reading characteristics at the same time, and can perform true-false identification by utilizing a special non-contact detector. The holographic dealuminized composite film material can be prepared into hot stamping labels or non-setting adhesive labels, can be used for carriers of bills and cards such as bank cards / credit cards, checks, passports, securities and the like, and improves the anti-counterfeiting effect of anti-counterfeiting objects through thecombination of multiple anti-counterfeiting characteristics of first-line public and second-line machine reading.

Description

technical field [0001] The invention belongs to the technical field of anti-counterfeiting, and relates to a composite thin film material with holographic optical variable characteristics and machine-readable detection characteristics. The invention also relates to anti-counterfeit objects and valuable items using the composite thin film material. Background technique [0002] Holographic optically variable films have been widely used in the anti-counterfeiting of various products. For example, USP 5817205A1 describes a method and equipment for manufacturing valuable paper with optically variable anti-counterfeiting features, which introduces the use of holographic optically variable The process of transferring the film to the valuable paper by hot stamping according to a certain shape, and the equipment flow for realizing the above process. USP2006275671A1 and USP 2007160912A1 respectively disclose the multi-layer structure of multiple holographic transfer foils or holograp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09F3/02G09F3/10B41M5/382B44F1/12B42D25/29B42D25/373
Inventor 曹瑜李晓伟叶中东李新宇李万里
Owner CHINA BANKNOTE PRINTING & MINTING
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