KR100433680B1 - Security sheet including a transparent thin film having fluorescence color fiber and method for preparing the same - Google Patents

Abstract

The present invention relates to a security sheet including a transparent thin film having fluorescence properties and a method for manufacturing the same. More specifically, after treating a release agent on a PET or PVC film, the acrylic resin or polyethylene resin is coated thereon to protect the same. After forming a layer, depositing a metal material, and adding a hologram effect to produce a fluorescent short-wave (254nm) and long-wave (365nm) of fluorescent color to the pressure-sensitive adhesive or adhesive, by adding a photo and When the thin film is separated in order to forge and change the identity information part, the thin film is destroyed and no hologram effect is shown. When using chemicals, the thin film is dissolved and heat is deformed. The inspection of the modulation can be easily performed by the naked eye, and when the ultraviolet light is irradiated, the fluorescence intrinsic color is short-wave (254 nm) and long. As the light emission in (365㎚) it is possible to easily check the authenticity of the device.

Description

Security sheet including a transparent thin film having fluorescence color fiber and method for preparing the same}

The present invention relates to a security sheet including a transparent thin film having fluorescence properties and a method for manufacturing the same, and more particularly, to form a release layer on a film such as polyethylene terephthalate (PET) or polyvinyl chloride (PVC). The present invention relates to a security sheet and a method of manufacturing the same, in which a fluorescent substance is applied to a transparent thin film for preventing forgery and alteration, in which a fluorescent color yarn prepared by adding a holographic effect by depositing a metal material and then adding a fluorescent effect to the pressure-sensitive adhesive can be applied. .

In order to prevent forgery and alteration of security documents and various identification cards, the base sheet of the security film is conventionally coated with PET or PVC film by heat-sealing resin or adhesive, and then attached to the photo attachment site. Means for use have been used. However, the ID card coated with a heat-sealing protective film can be relatively easy to separate the PVC or PET film of the base sheet by heating it, there is a drawback that is easy to replace the picture.

The print layer printed on the security film is treated with a releasing agent to be transferred to the picture so that it is easy to determine whether the picture is replaced, and as a means of expressing print contents in the replaced picture extremely difficult, It is applied to the ethylene vinyl acetate (EVA) layer of the adhesive layer, and when the security film is peeled off, the printing ink printed on the adhesive layer of the protective film is separated from the security film and transferred to a photograph by Korean Patent No. 098070 ( '96 .4.9).

In addition, in Korean Patent Laid-Open Publication No. 2000-039203, a heat-sealable adhesive layer is formed on an inner surface of a security film, and a security printing layer is formed thereon, and an ink for forming a security printing layer is provided with an alcohol and a glycol-based aid in a water-soluble resin. Disclosed is a method for producing a security film in which a thomson is formed on the security film in forming and mixing a varnish mixed with a system and a pigment and a functional material.

However, in the case of such a forgery and alteration technique, unlike the past, the PVC or PET film, which is the base sheet of the security film, is separated with expensive equipment and chemicals, and then a fluorescent material or a hidden picture is inserted and iron is almost perfect. Techniques that were impossible in the past, such as production, appeared, and forgeries and forgeries produced by such a technique are almost impossible to visually identify, and there is a problem that their identification is not easy even when mobilizing forgery and forgery identification equipment.

On the other hand, a hologram on a metal film is a technology capable of reproducing a three-dimensional shape. A laser uses an optical component to separate light into two, and one light is reflected on an object to produce an object wave, which is a reflected wave. And the other, on the film, the object wave and the reference wave are recorded with interference on the film, and when reproduced, the stereoscopic image is reproduced.

This hologram technology is applied in many industries such as advertising marketing, new technology application field, packaging, etc. Also, the technology for manufacturing a heat-adhesive film by applying hologram technology to a transparent metal thin film is disclosed in Korean Patent No. 074100 ('98 .11.3). Although it was developed according to), it is insufficient to apply it as a forgery / falsification prevention element of special documents and various IDs.

Therefore, an object of the present invention for solving the above problems is to form a release layer on the PVC or PET film and to deposit a metal material in order to cope with forgery and tamper resistance of security documents, various identification cards, etc. The present invention provides a method for manufacturing a security sheet including a transparent thin film having a fluorescent property of removing a PET film as a base sheet by adding a fluorescent color yarn having a short wave and a long wave fluorescence effect to an adhesive added thereto. .

Another object of the present invention is to prepare a security sheet comprising a transparent thin film having a fluorescence characteristic to maximize the anti-falsification effect by adding a fluorescent color yarn showing the fluorescence effect of short and long waves to the adhesive of PET or PVC film To provide a method.

Still another object of the present invention is to provide a security sheet manufactured by the above methods.

Method for producing a security sheet comprising a transparent thin film having a fluorescence property of the present invention for achieving the above object is a primary release agent (waxes) to 1 to 4㎛, PET or PVC film, acrylic resin or polyethylene second Providing a PET or PVC film coated with a resin of 1-7 μm; Providing a metal film in which a metal material is deposited at 500 to 2000 microns on the film; Transferring the hologram shape to the metal film by embossing the holographic disc on the metal film; Providing an invisible fluorescent color yarn comprising at least two fluorescent materials emitting at different wavelengths; Providing an adhesive varnish having an acrylic monomer as a main component and an adhesive varnish having a water soluble acrylic resin having a polymerization degree of 800 to 1400 as a main component; Mixing 0.1 to 10% by weight of the fluorescent yarn and 90 to 99.9% by weight of the pressure-sensitive adhesive varnish and the adhesive varnish to provide an adhesive or an adhesive to which fluorescent properties are added; And uniformly applying the adhesive on a release paper at 3 to 20 μm, then laminating the transparent thin film on which the hologram shape is transferred, or applying the adhesive on the transparent thin film on which the hologram shape is transferred to 3 to 20 μm. It consists of.

According to another aspect of the present invention, there is provided a method of manufacturing a security sheet including a transparent thin film having a fluorescence property according to an embodiment of the present invention, the method comprising: providing an invisible fluorescent color yarn comprising at least two fluorescent materials emitting at different wavelengths; Providing an adhesive varnish having an acrylic monomer as a main component and an adhesive varnish having a water soluble acrylic resin having a polymerization degree of 800 to 1400 as a main component; Preparing 0.1 to 10 wt% of the invisible fluorescent color yarn and 90 to 99.9 wt% of the pressure-sensitive adhesive varnish or adhesive varnish to prepare a pressure-sensitive adhesive or adhesive with added fluorescent properties; And uniformly applying the adhesive on a PET film or PVC film at 5 to 30 μm, then laminating it with a release paper, or uniformly applying the adhesive directly on the PET film or PVC film at 5 to 50 μm. .

Security sheet of the present invention for achieving the above another object is manufactured by the above methods and used for preventing forgery and forgery of special documents, passport identity information, resident registration card, seal certificate, bankbook seal, or various identification cards.

1 is a cross-sectional view schematically showing the structure of a security sheet according to the first embodiment of the present invention,

Figure 2 is a cross-sectional view schematically showing the structure of a security sheet according to a second embodiment of the present invention,

FIG. 3 is a schematic diagram showing a distribution state of fluorescent color yarns exhibiting fluorescence characteristics in short waves (254 nm) and long waves (365 nm) in the transparent thin film of FIG. 1,

4 is a perspective view schematically showing a state in which a security sheet according to Embodiment 1 of the present invention is attached to an identification card,

5 is a perspective view schematically showing a state in which the security sheet according to the second embodiment of the present invention is attached to the identification card.

※ Explanation of code about main part of drawing ※

1. Base sheet (PET or PVC) 2. Release layer

3. Resin layer 4. Metal thin film layer (ZnS)

5. Adhesive or adhesive layer 6. Release paper

7. Fluorescent color yarn (254 nm) 8. Fluorescent color yarn (365 nm)

9. Mixed layer of adhesive and fluorescent color yarn 10. Photo

11.Identity Information 12.Identity Information Sheet

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

As described above, the security sheet currently in use uses PVC or PET film as the base sheet. The thickness of PVC film is about 80㎛, PET film is about 10 ~ 25㎛ thickness, EVA coating is applied by using applicator about 30 ~ 70㎛, and photo transfer type special ink is formed on the back of adhesive. To produce a security sheet. When the security sheet is attached to the photo and identity information, the printed contents printed on the security sheet are adhered to the photo part, and when another photo is attached to the place where the photo is removed, the printed contents printed on the security sheet are changed. Means are used that do not appear on the surface and make it easy to recognize the fact of forgery or modulation. However, the new anti-counterfeiting method (forgery by chemicals, forgery by heat) separates the PVC or PET film, which is the base sheet of the security sheet, and thus prevents forgery and alteration.

In the present invention, in order to cope with this new forgery / modulation method, a fluorescent color yarn which exhibits a fluorescence effect at at least two different wavelengths was used, and in the present invention, a hologram effect was added to the metal layer on which the metal material was deposited. When the thin film is separated in order to forgery and forgery the photo and identity information by the above-mentioned method, the thin film is destroyed and the hologram effect is not shown. When the chemical is used, the thin film is dissolved and heated. The security film is deformed, so that the forgery and forgery can be easily inspected by the naked eye. When UV light is irradiated, the fluorescence intrinsic color is emitted from short and long waves so that the authenticity of the device can be easily checked. Can be.

1 is a cross-sectional view schematically showing the structure of a security sheet according to the present invention, the release layer (2) for separating the PET or PVC film on the base sheet PET or PVC film (1), the metal deposition layer protection One synthetic resin layer (3) selected from acrylic resin and polyethylene resin, metal deposition layer (4) for enhancing holographic reflection effect, short wave (254 nm) (7) and long wave (365 nm) (8), which are fluorescent characteristics ) Has a structure in which an adhesive or an adhesive layer 5 for adding an effect and attaching to an application material, and a release paper layer 6 for protection when using the adhesive are sequentially stacked.

Figure 2 is a cross-sectional view schematically showing another structure of the security sheet according to the present invention, a short wave (254 nm) (7) and long wave (365 nm) (8) having a fluorescent characteristic on the PET or PVC film (1) as the base sheet ) Has a structure in which an adhesive or an adhesive layer 5 for adding an effect and attaching to an application material, and a release paper layer 6 for protection when using the adhesive are sequentially stacked.

FIG. 3 is a distribution state diagram of an invisible fluorescence color yarn with the effect of the short wave 7 and the long wave 8 having fluorescence characteristics in the embodiment shown in FIG. 1, and FIG. 4 is in the embodiment shown in FIG. 1. 5 is a cross-sectional view attached to a photograph and an identity information column, and FIG. 5 is a perspective view of a photograph and an identity information column attached to FIG. 1.

According to a preferred embodiment of the present invention, a release agent (waxes) 2 is firstly applied to a PET or PVC film 1 having a thickness of 10 to 25 μm, and an acrylic resin or a polyethylene resin 3 is secondly formed. It is uniformly applied to the gravure printing method of about 1 to 7㎛, and then a metal material (for example, ZnS, TiO ₂ , ZrO _2, etc.) 4 is deposited on the film prepared in the above process about 500 to 2000Å. Then, the holographic image is inserted by irradiating a laser light to the glass plate coated with the photoresist, and then a silver spraying process is performed on the glass plate to produce a holographic nickel plate. When the embossed holographic disc is used on the metal film, the metal film 4 to which the hologram shape is transferred is manufactured.

Meanwhile, at least two fluorescent materials emitting light at different wavelengths (preferably, short wavelength: 254 nm and long wavelength: 365 nm) are dyed at each wavelength by nylon to prepare invisible fluorescent color yarns, and then use a single cutting machine. To produce invisible fluorescent yarns 7 and 8 cut to a length of 0.2 to 5 mm. Next, a pressure-sensitive adhesive varnish is prepared by mixing 10-40% by weight of an acrylic monomer (Monomer), 40-70% by weight of toluene, and 10-30% by weight of ethyl acetate.

In addition, 0.1 to 3 parts by weight of ammonium persulfate was added as a polymerization initiator to 99 parts by weight of 25% by weight of acrylic acid monomer, and 0.1 to 1 part by weight of triphenylchloromethane was added as polymerization inhibitor at about 80 ° C. The reaction is carried out for about 40 minutes to polymerize a water-soluble acrylic resin having a polymerization degree of about 800 to 1400. The reaction process at this time is as in Scheme 1 below.

CH ₂ = CH-COOH ------ → (-CH ₂ -CH-COOH-) _n

The adhesive varnish which mixed 20-35 weight% of acrylic resins prepared in this way, 20-35 weight% of vinyl acetate, and 30-60 weight% of ethyl alcohol is prepared.

Next, 0.1-10 wt% of the invisible fluorescent color yarn (short wave, long wave) prepared above was mixed with 90-99.9 wt% of the pressure-sensitive adhesive varnish or adhesive varnish to prepare an adhesive or adhesive agent 5 having added fluorescence properties, respectively. do.

According to the present invention, the pressure-sensitive adhesive obtained in the above step is uniformly coated on a release paper with a thickness of about 3 to 20 μm, and then laminated on a transparent thin film on which the hologram shape is transferred to prepare a structure as shown in FIG. 1. In addition, the adhesive with the fluorescence properties obtained in the above process is applied to a transparent thin film having a hologram shape transferred to about 3 to 20㎛ to prepare a structure as shown in FIG.

As such, the identification sheet of FIG. 5 may be manufactured by attaching a security sheet imparting fluorescence to the transparent thin film to the identity information column or the surface of the security document of the passport photo transfer method.

Meanwhile, according to another preferred embodiment of the present invention, at least two kinds of fluorescent materials (for example, short wavelength: 254 nm and long wavelength: 365 nm) that emit light at different wavelengths are dyed in nylon yarn for each wavelength and then rained. After producing the fluorescent fluorescent yarns, invisible fluorescent yarns 7 and 8 cut to a length of about 0.2 to 5 mm using a cutting machine were produced. Next, the pressure-sensitive adhesive varnish 5 was prepared by mixing 10-40% by weight of the acrylic monomer, 40-70% by weight of toluene, and 10-30% by weight of ethyl acetate.

In addition, 0.1 to 3 parts by weight of ammonium persulfate was added to 99 parts by weight of the acrylic acid monomer of 25% by weight as a polymerization initiator, and 0.1 to 1 parts by weight of triphenylchloromethane was added as a polymerization inhibitor to react at about 80 ° C. for about 40 minutes. A water-soluble acrylic resin having a degree of polymerization of about 800 to 1400 is polymerized. The reaction process at this time is the same as in Scheme 1. The adhesive varnish which mixed 20-35 weight% of acrylic resins prepared in this way, 20-35 weight% of vinyl acetate, and 30-60 weight% of ethyl alcohol is prepared.

Next, 0.1-10 wt% of the invisible fluorescent color yarn (short wave, long wave) prepared above was mixed with 90-99.9 wt% of the pressure-sensitive adhesive varnish or adhesive varnish to prepare an adhesive or adhesive agent 5 having added fluorescence properties, respectively. do.

According to the present invention, the pressure-sensitive adhesive film is produced by uniformly applying a pressure-sensitive adhesive with a fluorescent property to 10 to 50㎛ PET film or PVC film, about 5 to 30㎛, and then laminated with a release paper. Adhesive film production is uniformly applied directly to the PET film or PVC film to about 5 ~ 50㎛.

In this way, by attaching a security sheet imparting fluorescence to the transparent film on the identity information field of the passport photo transfer method or the surface of the security document, it is possible to manufacture an identification card as shown in FIG.

As described above, in the present invention, a hologram is formed on a transparent thin film, and after the release agent (Wax) is processed on a PET or PVC film by a security sheet using a fluorescent property on the pressure-sensitive adhesive and a method of manufacturing the same, an acrylic resin or polyethylene thereon The resin is coated to form a protective layer, a metal material is deposited, and a hologram effect is added to the adhesive (acrylic monomer) to add short-wave (254 nm) and long-wave (365 nm), which are fluorescent properties, by the forgery method. When the thin film is separated for the forgery and alteration of the photograph and the identity information part, the thin film is destroyed and the hologram effect is not shown. When the chemicals are used, the thin film is dissolved and the thin film is deformed when separated by heat. When the ultraviolet rays are irradiated by the device method, special fluorescence-specific color appears in short wave (254 nm) and long wave (365 nm). Overcome technical difficulties to avoid.

Hereinafter, 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]

The releasing agent (waxes) was first applied to a PET film 1 having a thickness of about 15 µm (2), and the polyethylene resin (3) was applied uniformly to the gravure printing method at about 4 µm.

[Step 2]

A metal material (ZnS) 4 was deposited on the film prepared in the first process at about 1300 mm 3.

[Step 3]

After the hologram disc (Ni plate) was manufactured using a laser, the metal film (4) to which the hologram shape was transferred was manufactured by embossing the hologram disc to the metal film prepared in the second step.

[Step 4]

In the first step, using a fluorescent material (short wave length: 254 nm and long wave length: 365 nm) was dyed at each wavelength in nylon yarn to produce an invisible fluorescent color yarn, and then invisible fluorescent color cut to about 1 mm length using a cutting machine Yarns 7 and 8 were prepared.

A pressure-sensitive adhesive varnish containing 30% by weight of an acrylic monomer, 55% by weight of toluene and 15% by weight of ethyl acetate was prepared in two steps.

In 3 steps, 1 part by weight of ammonium persulfate was added as a polymerization initiator to 99 parts by weight of 25% by weight of acrylic acid monomer, 0.3 parts by weight of triphenylchloromethane was added as a polymerization inhibitor, and reacted at about 80 ° C. for about 40 minutes. The water-soluble acrylic resin of was polymerized. An adhesive varnish was prepared by mixing 30% by weight of acrylic resin, 30% by weight of vinyl acetate, and 40% by weight of ethyl alcohol.

In step 4, 5% by weight of the invisible fluorescent color yarns (short wave and long wave) prepared in step 1 were mixed with 95% by weight of the adhesive varnish and adhesive varnish prepared in the second and third steps to add fluorescence characteristics. An adhesive and an adhesive were prepared, respectively.

[Step 5-1]

The pressure-sensitive adhesive varnish added the fluorescent properties in the fourth step was uniformly applied to the release paper at about 10 μm, and then laminated on the transparent thin film to which the hologram shape was transferred in the third step.

[Step 5-2]

An adhesive with fluorescent properties added in the fourth step was applied to the transparent thin film having the hologram shape transferred in the third step at about 10 μm.

[Step 6]

The identification sheet as shown in FIG. 5 is manufactured by attaching a security sheet using fluorescence characteristics to each transparent thin film film manufactured by steps 5-1 and 5-2 on the identity information column or the surface of the security document of passport photo transfer method. It was.

Example 2

[Step 1]

Invisible fluorescent dyeing yarn was prepared by dyeing the nylon yarn by each wavelength using fluorescent material (short wave length: 254 nm and long wave length: 365 nm), and cutting it to about 1 mm length using a cutting machine (7 And 8) were prepared.

[Step 2]

An adhesive varnish was prepared by mixing 30% by weight of an acrylic monomer, 55% by weight of toluene and 15% by weight of ethyl acetate.

[Step 3]

1 part by weight of ammonium persulfate was added as a polymerization initiator to 99 parts by weight of a 25% by weight acrylic acid monomer, 0.3 parts by weight of triphenylchloromethane as a polymerization inhibitor, and reacted at about 80 ° C. for about 40 minutes to produce a water-soluble acrylic having a degree of polymerization of about 1400. The resin was polymerized. Adhesive varnish was prepared by mixing 30% by weight of acrylic resin, 30% by weight of vinyl acetate, and 40% by weight of ethyl alcohol.

[Step 4]

5% by weight of the invisible fluorescent color yarns (short wave and long wave) prepared in the first step were mixed with 95% by weight of the adhesive varnish and the adhesive varnish prepared in the second step and the third step to add fluorescence properties.

[Step 5]

The adhesive film was prepared by uniformly applying a pressure-sensitive adhesive having a fluorescent property in a fourth step to about 30㎛ PET film of about 30㎛, then laminated with a release paper. Adhesive film production was uniformly applied directly to the PVC film to about 30㎛.

[Step 6]

The identification sheet as shown in FIG. 5 was manufactured by attaching a security sheet using fluorescent properties to the surface of a passport identity information column or a security document on the transparent film manufactured by the fifth process.

As can be seen through the above embodiment, the present invention is a transparent thin film is destroyed when the identification card as shown in Figure 5 in order to forge and falsify personal information and security documents of the passport identity information section and visa section The hologram effect does not appear, and when the heat is applied, the security film is deformed, so that it is easy to visually inspect the forgery and alteration facts, and when the ultraviolet light is irradiated with different wavelengths of fluorescence, for example, short wave By emitting light at (254 nm) and long waves (365 nm), it is possible to develop a technology that can easily check the authenticity of the device, which effectively disables forgery and modulation.

Claims (8)

Providing a PET or PVC film coated primarily with a release agent (waxes) on a PET or PVC film at 1 to 4 μm, and on a secondary acrylic or polyethylene resin at 1 to 7 μm; Providing a metal film in which a metal material is deposited at 500 to 2000 microns on the film; Transferring the hologram shape to the metal film by embossing the holographic disc on the metal film; Providing an invisible fluorescent color yarn comprising at least two fluorescent materials emitting at different wavelengths; Providing an adhesive varnish having an acrylic monomer as a main component and an adhesive varnish having a water soluble acrylic resin having a polymerization degree of 800 to 1400 as a main component; Mixing 0.1 to 10% by weight of the fluorescent yarn and 90 to 99.9% by weight of the pressure-sensitive adhesive varnish and the adhesive varnish to provide an adhesive or an adhesive to which fluorescent properties are added; And After applying the pressure-sensitive adhesive to the release paper uniformly 3 ~ 20㎛, laminating the transparent thin film to the hologram shape transfer, or applying the adhesive to the transparent thin film to the hologram shape transfer 3 to 20㎛ Method of manufacturing a security sheet comprising a transparent thin film having a fluorescent characteristic, characterized in that configured. Providing an invisible fluorescent color yarn comprising at least two fluorescent materials emitting at different wavelengths; Providing an adhesive varnish having an acrylic monomer as a main component and an adhesive varnish having a water soluble acrylic resin having a polymerization degree of 800 to 1400 as a main component; Preparing 0.1 to 10 wt% of the invisible fluorescent color yarn and 90 to 99.9 wt% of the pressure-sensitive adhesive varnish or adhesive varnish to prepare a pressure-sensitive adhesive or adhesive with added fluorescent properties; And It is composed of the step of uniformly applying the adhesive to the PET film or PVC film at 5 to 30㎛, then laminating with a release paper, or uniformly applying the adhesive directly to the PET film or PVC film at 5 to 50㎛. Method of manufacturing a security sheet comprising a transparent thin film having a fluorescent characteristic. The method of claim 1 or 2, wherein the fluorescent material is dyed at each wavelength of nylon yarn using at least two or more fluorescent materials emitting light at different wavelengths to produce an invisible fluorescent color yarn, the length using a cutting machine A method for manufacturing a security sheet comprising a transparent thin film having a fluorescent property, characterized in that cut to 0.2 to 5mm. 4. The method of claim 3, wherein the wavelength of the fluorescent material is shortwave (254 nm) and long wave (365 nm). The pressure-sensitive adhesive varnish according to claim 1 or 2, wherein the pressure-sensitive adhesive varnish consists of 10 to 40% by weight of an acrylic monomer, 40 to 70% by weight of toluene, and 10 to 30% by weight of ethyl acetate. 20 to 35% by weight of a water-soluble acrylic resin, 20 to 35% by weight of vinyl acetate and 30 to 60% by weight of ethyl alcohol. 6. The water-soluble acrylic resin of claim 5, wherein 0.1 to 3 parts by weight of ammonium persulfate is added as a polymerization initiator to 99 parts by weight of 25% by weight of acrylic acid monomer, and 0.1 to 1 parts by weight of triphenylchloromethane is added as a polymerization inhibitor. Method of manufacturing a security sheet comprising a transparent thin film having a fluorescent characteristic characterized in that it is manufactured. The method of claim 1, wherein the metal material is ZnS, TiO ₂ , or ZrO ₂ . A security sheet manufactured by the method according to any one of claims 1 to 7, and used for preventing forgery and forgery of a special document, passport identification information, a resident registration card, a seal certificate, a bankbook seal, or various identification cards.