KR100638978B1 - Hologram thin film for anti-counterfeit using digital hidden image and preparing method thereof - Google Patents

Abstract

The present invention relates to an anti-counterfeiting holographic thin film using a digital latent image and a method of manufacturing the same, after treating a release agent on a resin-based film support, and subsequently forming a protective layer, a metal layer and an adhesive layer thereon, the digital layer on the metal layer A predetermined hologram pattern to which the latent image effect is added is transferred. The anti-counterfeiting holographic thin film according to the present invention can not be identified by the naked eye, while the latent image mark appears when using a viewer (viewer) can prevent counterfeiting in advance. In addition, according to the present invention, by configuring the latent image pattern and the background pattern represented on the holographic thin film by the angular line and the line, the line and the dotted line or the angle conversion of the dotted line and the dotted line, by designing the same screen density of the latent image pattern and the background pattern It is difficult to visually identify the latent image pattern, and the latent image mark appears when the viewer uses the holographic thin film to identify the genuine product, thereby contributing to the prevention of counterfeiting.

Hologram, anti-counterfeiting, thin film, protective resin layer, metal layer, latent image pattern, background pattern, viewer

Description

Hologram thin film for anti-counterfeit using digital hidden image and preparing method

1 is a side cross-sectional view schematically showing examples of various holographic thin film structures according to the present invention.

2 is a plan view schematically showing a method in which a digital latent image, a fine character, or the like is applied to a holographic thin film according to the present invention.

3 is a plan view schematically showing a method of adding a latent digital image to the holographic thin film according to the present invention.

4 is a plan view schematically showing a viewer for confirming a latent digital image when the latent digital image is applied to a holographic thin film according to the present invention.

5 is a plan view schematically showing a state that appears when the digital latent image ratio is confirmed by the viewer after applying the latent image to the holographic thin film according to the present invention.

※ Explanation of code about main part of drawing ※

10: support 20: release layer

30: protective resin layer 40: hologram metal layer

45: detection mark 50: adhesive layer

60: printed matter 70: fine characters

80 (a), 80 (b): Digital latent image 90: PET film

The present invention relates to a forgery preventing holographic thin film using a digital latent image and a method of manufacturing the same. More specifically, after the release agent is treated on the resin-based film support, a protective layer, a metal layer, and an adhesive layer are sequentially formed thereon, and a digital latent image is inserted into the hologram pattern by using computer graphics, and then used on the metal layer. By adding the hologram effect, the digital latent image is not visible when visually observed, while the digital latent image secretary is displayed when using the viewer to check the authenticity of the device. It relates to a film and a method of manufacturing the same.

Hologram (hologram) is a technology that can reproduce the three-dimensional shape, by using the characteristics of the laser to reflect the information of each part of the object as a stereoscopic image by the interference phenomenon of the object wave reflected from the object and the reference wave straight from another angle Speak a technology that can be played.

The hologram technology uses a laser having a constant single wavelength to use a semi-transparent mirror to separate the light into two, and one of the light is reflected on the object to produce a reflected wave, the other is reflected on the film and the object wave and The reference wave causes interference on the film and is recorded and reproduced to reproduce stereoscopic images.

Such hologram technology is applied in various industrial fields such as advertisement materials for advertisement, new technology application field, and packaging. In this regard, Korean Patent No. 074100 describes a method of manufacturing a heat-adhesive film by applying hologram technology to a transparent metal thin film, but applies it as an anti-counterfeiting element of bank notes, securities, gift certificates, and various ID cards. It is insufficient to follow.

On the other hand, in recent years, a method of applying a hologram technology to banknotes, securities, gift certificates, passports, driver's licenses, cards, and the like, has been researched to give a tamper-proof function. For example, Korean Patent Laid-Open Publication No. 2000-46381 discloses a transparent layer in which a release layer is formed on a film such as PET or PVC, a metal material is deposited, a hologram effect is added, and a fluorescence property is added to the adhesive to impart fluorescence. A security sheet including a thin film is introduced.

However, the methods according to the prior art as described above are generally thermally transferred by the general adhesive layer to the card and the printed material in which the protective resin layer and the reflective holographic metal layer are adhered layers, so that the authenticity identification for imitation forgery is not greatly distinguished. There are disadvantages.

Accordingly, in the present invention, as a result of various studies to solve the problems as described above, in the thermal transfer reflective holographic thin film, by applying a digital latent image to the holographic pattern of the computer graphics to a portion of the banknote that requires security The present invention has been completed with the idea that it can be used for counterfeit prevention in various printed matters, such as securities, gift certificates, and ID cards.

Accordingly, an object of the present invention is to insert a digital latent image secretary onto a holographic pattern by a computer graphic on a holographic thin film in a banknote, securities, gift certificate, card, etc., by adding a tamper resistant function. While the digital latent image is not visible when visually observed, the digital latent image of the latent image is shown when the viewer is used to confirm the authenticity of the device. To provide.

Another object of the present invention is to provide a holographic thin film for preventing forgery prepared according to the above method.

Method of producing a forgery-resistant holographic thin film using a digital latent image according to the present invention for achieving the above object:

In the manufacturing method of holographic thin film,

(a) applying a release agent on the resin film support to form a release layer;

(b) applying a resin selected from the group consisting of polyester, polyamide, polycarbonate, cellulose ester, fluorine resin, polyacetal and polyimide resin on the release layer to form a protective resin layer;

(c) depositing a metal selected from the group consisting of Al, Zr, ZnS and Ti on the protective resin layer to form a metal layer;                         

(d) forming a latent image pattern and a background pattern applied to the hologram pattern using a digital latent image through an angle conversion of full lines and dotted lines, an angle conversion of dotted lines and dotted lines, or an angle conversion of full lines and full lines; Forming a hologram disc having a predetermined hologram shape such that the screen concentrations are the same;

(e) embossing the hologram disc on the metal layer to form a hologram metal layer to which a predetermined hologram shape is transferred; And

(f) applying an adhesive on the holographic metal layer to form an adhesive layer

Characterized in that it comprises a.

The anti-counterfeiting holographic thin film using the digital latent image according to the present invention for achieving the above another object is characterized in that it is used for preventing forgery and alteration of banknotes, securities, gift certificates, cards and the like.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

As described above, the holographic thin film using the digital latent image according to the present invention is provided with a hologram effect by depositing a metal material. In particular, the latent latent image may be inserted into the holographic pattern by computer graphics to cope with the above and modulation. In other words, authenticity can be identified by checking the non-marking by the viewer in the digital latent image portion of the holographic thin film.

Figure 1 (a) (b) is a side cross-sectional view schematically showing examples of various holographic thin film structure according to the present invention, the resin-based film support 10, the release layer 20 for easy peeling of the support, the metal layer A protective resin layer 30 for protection, a holographic metal deposition layer 40 having a digital latent image effect added, an adhesive layer 50 for attaching a thin film to an applied material, and optionally attaching the holographic thin film to a specific portion It includes a printed material for 60.

In the method of manufacturing a holographic thin film using a latent digital image according to the present invention, first, a release agent is formed on a resin-based film support 10 to form a release layer 20, and then a protective resin is applied to the protective resin layer 30. Forming.

The resin-based film support 10 is a portion to which direct heat is applied during thermal transfer, and the resin-based film usable in the present invention is not particularly limited, but preferably, polyester, poly such as polyethylene terephthalate or polybutylene terephthalate It is selected from acrylates, polycarbonates, cellulose esters, polyacetals and polyimide films, more preferably polyester films. Here, the thickness of the support 10 is typically 5 to 30㎛.

On the other hand, the release layer 20 is placed between them for easy peeling of the support 10 and the protective resin layer 30. The material of the release layer 20 is not particularly limited, but is preferably selected from waxes, silicone waxes, silicone resins, and fluorocarbon resins, more preferably silicone resins. At this time, the thickness of the release layer 20 is typically 0.5 to 5㎛.

In the present invention, the protective resin layer 30 is a transparent protective layer that functions to protect the layers located below, improves the gloss of the image, such as printed on the printed material, and prevents damages such as discoloration and scratches of the image To prevent durability. The resin used for the protective resin layer 30 is selected from the group consisting of polyester, polyamide, polycarbonate, cellulose ester, fluorine resin, polyacetal and polyimide resin, and polyester resin is particularly preferable. In this case, the thickness of the protective resin layer 30 is preferably about 2 to 6 μm, which may provide excellent durability.

Next, the hologram metal layer 40 is formed on the protective resin layer 30. Here, the hologram metal layer 40 is formed by depositing a metal on the protective resin layer 30 to about 500 to 2500 kPa, and then embossing and transferring a hologram disc having a predetermined hologram shape.

The hologram metal layer 40 is a layer in which a hologram effect is induced by embossing to play a visual action. The metal used in the present invention is selected from the group consisting of Al, Zr, ZnS, Ti, and the like.

In addition, the technology for applying the hologram to the metal has various enhancements to anti-counterfeiting functions, such as full line and full line, specific line and dotted line or angle conversion technique of dotted line and dotted line, and fine characters on the hologram pattern by computer graphics. Security technology is combined.

In the holographic pattern using the digital latent image according to the present invention, when the latent image pattern and the background pattern are arranged in a full line of the same area on a specific portion of the holographic pattern in computer graphics, the bows are uniformly arranged, and as an example, the angle of the full line and the dotted line. The conversion method is configured as shown in FIG. Further, the background pattern or the latent image pattern corresponding to the latent latent image pattern or the background pattern arranged by the dotted line is arranged in a distribution state different from the dotted line by full line, but the screen bow and the concentration are arranged the same with respect to the full line.

In addition, as shown in FIG. 3, any one of the latent image pattern or the background pattern is arranged in a dense state with a uniform dotted line, and the corresponding background pattern or the latent image pattern is appropriately arranged in full line to adjust the screen density equally. It is desirable to. Here, the viewer uses dense line as shown in FIG.

In adjusting the screen density, according to a preferred embodiment of the present invention, when the latent image pattern is a dotted line and the corresponding background pattern is full, the dotted line has a thickness (0.01 to 0.04 mm) and an interval (0.04 to 0.09 mm). ), Screen tones (150 to 250 lines) of length (0.10 to 0.25 mm) and screen concentrations of 7 to 11%, and full lines of thickness (0.02 to 0.07 mm) and spacing (0.20 to 0.29 mm). It is arranged to have a screen tone of (60 to 85 lines) and a screen density of (7 to 11%), and the angle of the dotted line is arranged, for example, (15, 30, 45, 65, 75, 80 degrees), or the like. can do.

Here, if the size of the dotted line is out of the range, there is a problem in that a latent image pattern appears in the holographic thin film layer. Also, if the interval of the dotted line is out of the range, the screen density decreases to adjust the size of the dotted line. When enlarged, there exists a problem which a latent image pattern appears in a hologram thin film layer.

3, the latent image 80 (b) and the background pattern 80 (a) may be formed in a plurality of regions of the hologram metal layer 40, where a dotted line is adjacent to an adjacent region. And line can be changed and placed repeatedly.

The line of sight used for the viewer is regularly arranged to have a screen tone of (150 to 200 lines / inch) and a screen density of 15 to 50% on the PET film 90, as shown in FIG.

Finally, the adhesive layer 50 is laminated on the hologram metal layer 40 by applying an adhesive to a thickness of 1 ~ 5㎛.

The adhesive layer 50 is a means for bonding the holographic thin film to the printed object 60, the laminate according to the present invention is designed to be better bonded to the printed object, the adhesive is not particularly limited, the ester resin, acrylic Resins, vinyl chloride resins, copolymerized resins of vinyl chloride and vinyl acetate, and the like, and in particular, copolymer resins of vinyl chloride and vinyl acetate are preferable.

In addition, as shown in Figure 2, the holographic thin film according to the present invention is attachable to banknotes, securities, identification cards, for example, as a holographic metal layer 40, fine characters 70, digital latent image (80) The resulting holographic thin film to a gold foil printing machine and produced by attaching 1 to 3 mm larger than the metal layer 40 to which the hologram was added.

The detection mark 45 of FIG. 2 is positioned on banks, securities, gift certificates, cards, etc. in the attachment device such as a thermal transfer printer, a single heat transfer transfer machine, or a stamping machine. This is a detection mark for attaching.

As a transfer device for transferring the thermal transfer type holographic thin film of the present invention, a thermal transfer printer including a sublimation printer equipped with laminating and a heat transfer port, a single heat transfer transfer machine, or a stamping machine may be applied.

After applying the digital latent image to the holographic thin film as described above, the state that appears when the digital latent image ratio is confirmed by the viewer is shown in FIG. As described above, the final printed material produced by transferring the thermal transfer holographic thin film of the present invention may overcome the technical difficulty of preventing tampering by applying a security function due to a digital latent image hologram.

The present invention will be described in more detail with reference to the following examples, but the scope of the present invention is not limited thereto.

Example 1

[Step 1]

A release layer 20 was formed by uniformly applying a release agent (wax) at 1 μm to a 19 μm PET film 10, and a linear resin resin was uniformly applied at 4 μm by gravure printing to protect the resin layer ( 30) was formed, and a metal material (Al) was deposited thereon at about 1500 to 2000 GPa.

[Step 2]

Using computer graphics, when the digital latent image pattern is a dotted line on a specific portion of the hologram pattern and the corresponding background pattern is full, the dotted line has a thickness (0.04 mm), an interval (0.06 mm) and a length (0.25 mm). Screen tones of 150 to 200 lines) and screen concentrations of 8 to 9%, and full lines are (65 to 85 lines) screen tones of line thickness (0.04 mm), line spacing (0.20 mm), and (8 to 9 lines). %), And the dotted line angle is 45 degrees to produce a hologram pattern.

After manufacturing the holographic disc (Ni plate) prepared as described above, the holographic metal thin film (80 (a), 80 (b)) to which the digital latent image was applied was embossed using the hologram disc.

[Step 3]

A polyester varnish (30 wt% polyester resin + 60 wt% toluene + 10 wt% ethyl acetate) adhesive 50 was prepared.

[Step 4]

The adhesive prepared in the third step was applied to the metal deposition layer 40 to which the digital latent hologram was added in the second step.

[Step 5]

The latent holographic thin film film with the tamper proof function, which was prepared by the fourth process, was applied to products such as banknotes and securities using a hologram attaching machine or a gold foil printing machine.

Example 2

[Step 1]

A release layer 20 was formed by uniformly applying a release agent (wax) to a 19 μm PET film 10 at 4 μm, and the linear polyester resin was uniformly applied at 5 μm by gravure printing to protect the resin layer ( 30) was formed, and a metal material (Al) was deposited thereon at about 1500 to 2000 GPa.

[Step 2]

When the digital latent image pattern is a dotted line and the corresponding background pattern is a dotted line on a specific portion of the hologram pattern using computer graphics, the latent image pattern has a thickness (0.02 mm), an interval (0.07 mm) and a length (0.15 mm). A screen tone of (175 lines) and a screen density of 8 to 9%, and the background pattern is a screen tone of (175 lines) having a thickness (0.02 mm), an interval (0.07 mm), a length (0.15 mm), and 8 to 9 Placed at a screen concentration of 9%, the angle of the dotted line is placed at 60 degrees to prepare a digital latent image hologram pattern.

After manufacturing the holographic disc (Ni plate) prepared as described above, the metal film 80 (a) and 80 (b) to which the hologram shape to which the digital latent image was applied was transferred by embossing the holographic disc to the metal film. It was.

[Step 3]

A polyester varnish (30 wt% polyester resin + 60 wt% toluene + 10 wt% ethyl acetate) adhesive 50 was prepared.

[Step 4]

The adhesive prepared in the third step was applied to the metal deposition layer 40 to which the digital latent image hologram was added in the second step.

[Step 5]

The latent holographic thin film with the tamper proof function added in the fourth process was applied to a product such as a certificate or a card using a hologram attaching machine or a gold foil printing machine.

Here, the full line used as the viewer is regularly arranged to have a screen tone of 175 lines (line / inch) and a screen density of 25% on the PET film 90, as shown in FIG.

In the anti-counterfeiting holographic thin film using the digital latent image according to Examples 1 to 2, it is difficult to visually identify the digital latent image pattern. When the output is performed using a color output device, the holographic thin film applied portion appears gray or black. The latent secretion only appears when confirmed using the viewer. In addition, when the forgery imitates the holographic thin film in the printed material, when the digital latent image portion is confirmed by the viewer, no mark is displayed so that the counterfeit may be determined.

As described above, according to the present invention, the latent image pattern and the background pattern represented on the holographic thin film are composed of full line and full line, full line and dotted line, or angle conversion of dotted line and dotted line, and the screen density of the latent image pattern and background pattern is the same. While it is difficult to visually identify the latent image pattern by designing it, a latent image mark appears when the viewer uses the holographic thin film to identify the genuine image. In the case of printing using a color printer, the application area of the holographic thin film appears in gray or black, and when forging the holographic thin film in the printed material, the counterpart does not appear when the digital latent image is confirmed by the viewer. Discrimination can contribute to counterfeiting.

Claims (4)

In the manufacturing method of holographic thin film, (a) applying a release agent on the resin film support to form a release layer; (b) applying a resin selected from the group consisting of polyester, polyamide, polycarbonate, cellulose ester, fluorine resin, polyacetal and polyimide resin on the release layer to form a protective resin layer; (c) depositing a metal selected from the group consisting of Al, Zr, ZnS and Ti on the protective resin layer to form a metal layer; (d) forming a latent image pattern and a background pattern applied to the hologram pattern using a digital latent image through an angle conversion of full lines and dotted lines, an angle conversion of dotted lines and dotted lines, or an angle conversion of full lines and full lines; Forming a hologram disc having a predetermined hologram shape such that the screen concentrations are the same; (e) embossing the hologram disc on the metal layer to form a hologram metal layer to which a predetermined hologram shape is transferred; And (f) applying an adhesive on the holographic metal layer to form an adhesive layer Method for producing a holographic thin film for preventing counterfeit using a digital latent image comprising a. According to claim 1, wherein the latent image pattern or the background pattern is a line, the corresponding background pattern or latent image pattern is formed through the angle conversion of the dotted line, the line is 0.02 ~ 0.07 mm thickness and 0.20 ~ 0.29 mm intervals A screen tone of 60 to 85 lines and a screen concentration of 7 to 11%, the dotted line having a screen tone of 150 to 250 lines having a thickness of 0.01 to 0.04 mm, an interval of 0.03 to 0.09 mm and a length of 0.10 to 0.25 mm, Method for producing a holographic thin film for preventing anti-counterfeit using a digital latent image, characterized in that arranged to have a screen concentration of 7 to 11%. 3. A line according to claim 1 or 2, wherein the full line used in the viewer for reading the hologram is regularly arranged to have a screen tone of 150 to 200 lines and a screen density of 15 to 50%. Method of manufacturing a holographic thin film for preventing counterfeit using a digital latent image. A hologram thin film manufactured by the method according to claim 1 and used to prevent forgery of banknotes, securities, social security cards, or identification cards.

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