KR100775713B1 - Anti-counterfeit of the thin film having various security factors - Google Patents

Abstract

An anti-counterfeit thin film with various security factors is provided to detect counterfeiting easily by printing pictures and personal information with a toner-type photo transfer printer and dissolving or deforming a base sheet in applying chemicals or heat. An anti-counterfeit thin film with various security factors is composed of a polyester resin layer(40) applied on a release paper(50), wherein the polyester resin layer contains fumed silica of 3~10wt.%; a print layer(10) gravure-printed on the upper side of the polyester resin layer by using security ink containing color sequence materials of 5~10wt.%; and an adhesive layer(20) formed on the upper side of the print layer, wherein the adhesive layer contains two kinds of linear polyester resin of 15~35wt.% having different molecular weights of 26,000~28,000.

Description

Anti-counterfeit of the thin film having various security factors

1 is a cross-sectional view schematically showing the structure of a thin film according to the present invention,

2 is a schematic diagram schematically showing a state in which photographs and personal details are printed on the adhesive layer of FIG. 1 by a toner method;

3 is a cross-sectional view showing the structure of the functional material in the security ink layer of FIG.

4-1 is a state diagram in which the functional material of FIG. 3 is pulverized, and FIG. 4-2 is a schematic diagram showing a state in which 4-1 is inkled.

Figure 5 is a schematic diagram schematically showing the state attached to the identification card after printing the photos and personal information on the functional thin film according to the present invention toner-type photographic transfer machine.

FIG. 6 is a schematic diagram schematically illustrating a state in which forgery and modulation of FIG. 5 are performed using a color output device.

※ Code explanation for main part of drawing ※

10: photo and personal information printed layer 20: adhesive layer

30: secure ink printing layer 30-a, b, c, d, e secure tag structure

30-1: Secutag Ink 40: Polyester Resin Layer

50: release paper 60: varnish

The present invention relates to a forgery / tamper-proof thin film having various security elements, and more particularly, a polyester resin which dissolves when using chemicals as a base sheet of a security film, and a color printing machine using a photo transfer method. In the case of forgery and alteration, it is possible to identify whether the forgery and alteration more easily, including a printed layer that does not exhibit the security tag and the fluorescent effect, and relates to a thin film that can prevent substantial forgery and alteration. .

In order to prevent forgery and alteration of passports, resident registration cards, and various identification cards, a thermal transfer resin is applied to PVC or PET (Polyethylene terephthalate) film by applying a base sheet of a security film to a photo transfer ink for anti-counterfeiting to a photo attachment or photo transfer site. Means for using such materials have been used.

However, by transferring the printing layer printed on the security film to the photographing agent to be transferred to the photograph, it is easy to determine whether the photograph is replaced. In the above means of expressing the photographic transfer ink or the like on the photograph to be replaced, the degree of polymerization is extremely difficult. The printing ink is prepared by mixing alcohols and glycol-based auxiliaries to improve printing aptitude, and printing transfer ink prepared by adding a functional substance to the varnish. When applied to the ethylene vinyl acetate (EVA) layer, the security film was removed to overcome the technical difficulties of applying the release agent layer by causing the printing ink printed on the adhesive layer of the protective film to be transferred from the security film to the photograph. (Korean Registered Patent No. 098070).

In addition, in Korean Patent Laid-Open No. 2000-0039203, 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 auxiliary agent in a water-soluble resin. In forming a mixed varnish and a functional material by mixing, it discloses a method for producing a security film to form a Thompson on the security film.

However, in the case of the forgery and alteration technique, unlike the past, after separating the PVC, PET or transparent thin film, which is the base sheet of the security film, with expensive equipment and chemicals used for forgery and alteration, the fluorescent material or the hidden Techniques that were impossible in the past, such as the insertion of paintings and the making of Thompson, which is almost perfect, appeared, and forgeries and forgeries produced by such techniques are almost impossible to visually identify, and even when mobilized forgery and forgery identification equipment is not easy to identify. There is a problem.

Accordingly, the present invention applies a polyester resin which can be dissolved during chemical processing, instead of PVC or PET film, the base sheet of the security film to cope with the new forgery / modulation method described above, and the Secutag (color fine) Material) and functional ink using fluorescent material are applied by gravure printing method and adhesive film is applied on it, and it is possible to replace photos and personal information on thin film by using toner-type photocopy machine. Therefore, it has been found that the above-mentioned problem can be solved, and the present invention has been completed based on this.

Accordingly, an object of the present invention is to provide a forgery and alteration prevention thin film having various security elements that can respond to a new forgery and forgery method.

Forgery, tamper-proof thin film according to the present invention for achieving the above object,

A polyester resin layer coated on a release paper and formed of 3 to 10% by weight of fumed silica;

A printing layer formed on top of the polyester resin layer by printing a security ink including 5 to 10% by weight of a cuetag material in a gravure manner; And

It is formed by coating on top of the printed layer, and includes an adhesive layer containing 15 to 35% by weight of two kinds of linear saturated polyester resin having different molecular weights in the range of 26,000 to 28,000.

The functional thin film according to the present invention is used for preventing forgery and forgery of passport identification information, resident registration card, various identification cards, and the like.

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

The present invention does not use PVC or PET film which is generally used as the base sheet of the security film to cope with the above-described forgery and forgery method of the new form, and the poly-soluble resin used in the chemicals for the base sheet is used when chemicals are used. Ester resin is used.

Specifically, the forgery-modulation-type thin film according to the present invention is applied to the release paper, a thin resin coated with a fumed silica to the polyester resin to about 2 to 20㎛ to form a polyester resin layer, the polyester resin On the layer, gravure printing of a functional special ink including a Secutag material is performed to form a printing layer, and a resin composition containing a cellulose resin and a polyester resin is uniformly applied on the upper part of the printing layer to about 2 to 20 μm. It contains an adhesive layer.

1 is a cross-sectional view schematically showing the structure of a thin film according to the present invention, the base resin layer (polyester resin, 40), secuteg printed layer 30 and the adhesive layer on the release paper 50 of the functional thin film layer 20 has a structure in which they are sequentially stacked. FIG. 2 is a schematic view showing a state in which photographs and personal details are printed on the adhesive layer 20 of FIG. 1 by a toner-type photograph transfer machine, and FIG. 3 is a security tag used in the special ink layer 30 of FIG. 4 is a schematic view showing a state in which the functional material of FIG. 3 is pulverized, and FIG. 4-2 is a schematic diagram schematically showing a state of inking the Secutag material of 4-1. .

Figure 5 is a schematic diagram schematically showing a state attached to the identification card after printing the photo and personal information with a toner-type photoprinter on the adhesive layer on the forgery-modulation-type thin film according to the present invention, Figure 6 It is a schematic diagram which shows the state which forged and modified 5 by the color output device.

The polyester resin layer of the anti-falsification-proof thin film according to the present invention is applied on a release paper, 10 to 30% by weight polyester resin, 3 to 10% by weight fumed silica, aromatic hydrocarbon solvent of 6 to 8 carbon atoms 35 It contains -45 weight% and 25-35 weight% of methyl ethyl ketone, and toluene is used suitably as said aromatic hydrocarbon solvent.

It is preferable that the molecular weight of the said polyester resin is 21,000-26,000, More preferably, it is 21,000-22,000. At this time, if the molecular weight is less than 21,000, cracks appear in the resin layer, which is not preferable. If the molecular weight exceeds 22,000, the surface of the resin layer is soft and there is a problem of insufficient wear.

Fumed silica has an average particle diameter of 3 μm or less, and when it is out of the above range, the gloss and transparency of the surface of the resin layer are poor, which is not preferable. In addition, toluene and xylene may be preferably used in the above ranges as the aromatic hydrocarbon solvent, and methyl ethyl ketone or ethyl acetate is used as one component of the mixed solvent, and when out of the above ranges, the thin film is dried by a gravure printing machine. Problems may arise.

After the mixture was stirred for about 2 hours, a thin coating on a release paper of about 2 to 20 μm was used in place of a general base sheet (PVC or PET film). The above materials were simply mixed to prepare a printing plate in a gravure printing press. The base sheet layer is formed by coating with a depth (29 μm), viscosity (cup cup N03 25 to 29 seconds), and hot air (temperature 80 ° C.).

The printing layer is formed by gravure printing on the upper part of the polyester resin layer, and the printing security ink is a water-soluble acrylic resin having a polymerization degree of 800 to 1400. 22 to 38% by weight, 62 to 78% by weight of glycol and alcohol aids and 85 to 90% by weight of printing varnishes prepared by mixing an appropriate amount of additives (antifoaming agents), 5 to 10% by weight of functional pigments and alcoholic aids It contains less than 5% by weight. It is preferable that 55 to 75% by weight of the ethyl alcohol-based adjuvant and 3 to 7% by weight of the glycol-based adjuvant are contained as the adjuvant.

When the polymerization degree of the acrylic resin is less than 800, there is a problem in that the printability of the ink is insufficient, and when the polymerization degree exceeds 1400, the phenomenon of separation in the thin film layer due to drying delay during gravure printing is not preferable. In addition, if the amount thereof is less than 85 based on the printing varnish, there is a problem of insufficient ink transferability, and when the amount thereof exceeds 90, there is a problem that a bleeding phenomenon occurs.

On the other hand, the alcohol or glycol-based adjuvant is applied to improve the printability, in the present invention, in the printing varnish containing less than 62 (eg, alcohol 55, glycol 7) by weight in the printing for printing The varnish may have a problem of insufficient drying of the ink, and when it is used in an amount exceeding 78 (eg, alcohol 75, glycol 3) by weight, bleeding of the ink may occur, which is not preferable.

As the functional pigment included in the security ink, a secutag material (color sequence SECUTAG, SIMONS, Germany) (particle size: 8 to 15 μm) may be preferably used in the above range, and the functional ink included in the security ink may be, for example. For example, at least one invisible fluorescent substance selected from the group consisting of fluorescent substance Lumilux CD702, CD704 and CD770 may be further added within 2 to 6% by weight, and the secuteg material and the ratio The sum of the fluorescent phosphors does not exceed 10% by weight of the security ink.

The printing varnish and the secuteg material or the invisible fluorescent material are stirred for about 0.5 hours to prepare a security ink, which is printed on the polyester resin layer by gravure printing to form a printing layer.

The technology related to the print layer 30 is described in detail in the applicant's Korean Patent Registration No. 098070 and Korean Patent Application Publication No. 2000-0039203.

Fig. 3 shows the structure of the secuteg (3-a to e), and when the color is composed of a thin layer of yellow ⇒ white ⇒ blue ⇒ white ⇒ red finely pulverized using a pulverizer, the fine SEC as shown in Fig. 4-1. It becomes a tag substance. Because the produced Secutag material is fine, it does not appear in color output, and when viewed with a 30 times magnifier, it is shown in FIG. 4-1. In addition, the invisible fluorescent material is not visible in the varnish 60, as shown in Figure 4-2, but when the ultraviolet irradiation, the fluorescent color (red, green) inherent in the fluorescence emits an anti-counterfeiting effect.

The adhesive layer formed on top of the printed layer has a thickness of about 2 to 20 µm, and is prepared by mixing a cellulose resin and a linear saturated polyester resin with a solvent such as toluene and methyl ethyl ketone.

The softening point of the cellulose resin is 118 to 126 ° C, and includes 5 to 9% by weight based on the entire mixture of the adhesive layer, and when the content of the cellulose resin is less than 5% by weight, the color is printed. There is a problem of insufficient image effects, and if it exceeds 9% by weight, a phenomenon occurs that the color printer sticks to the drum when printing photographs and personal information.

Although the linear saturated polyester resin uses two kinds having different molecular weights together, the molecular weight of the two kinds of polyester resins is preferably 26,000 to 28,000, and specifically, those having a molecular weight of 26,000 to 27,000 (hereinafter, referred to as polyester A ) And 27,500 to 28,000 (hereinafter, polyester B) can be preferably used. The content of the polyester A resin is contained in 10 to 20% by weight, the polyester B resin is contained in 6 to 10% by weight, wherein the content of the polyester A resin when the content of the polyester A resin is less than 10% by weight when printing on a color printer If it exceeds 20% by weight, it is not desirable to stick to the drum during printing of color printer.If the content of polyester B resin is less than 6% by weight, it is difficult to adhere to ID. And, if it exceeds 10% by weight, the phenomenon that sticking to the drum of the color printer occurs, which is undesirable.

As a solvent, the mixed solvent of aromatic hydrocarbon solvents, such as toluene, and methyl ethyl ketone is used, Preferably the compounding ratio of the said aromatic hydrocarbon solvent and methyl ethyl ketone is 60-75: 25-35. The solvent is also contained in an amount of 65 to 75% by weight based on the entire mixture of the adhesive layer.

The mixture having the composition described above is stirred for 3 hours to prepare a linear polyester adhesive, and uniformly applying it on the upper surface of the printing layer to about 2 to 20 μm to produce a functional thin film capable of toner photographic transfer. .

Print the security ink on the polyester resin base sheet layer, and print the photograph and personal information on the functional thin film to which the adhesive is applied using a toner-type photo transfer machine, and then remove the release paper on the thin film, passport, ID card It may be attached to the identity information paper such as about 120 ° C. using a laminator.

When chemical chemicals are used to separate the forgery and alteration prevention thin film from the identification information sheet, the polyester resin layer used in place of the base sheet of the thin film is dissolved, and the thin film is separated by heat (about 100 ° C.). The film (polyester resin layer) is deformed. This cause is caused by softening point (90 ℃ ~ 140 ℃) of polyester resin and functional thin film due to the fact that Sycutag (particle size: 8 ~ 15㎛) material does not appear in color when copying forgery by color printer. It can overcome the technical difficulties according to the prior art for preventing film forgery and alteration. The forgery-modulation-type thin film according to the present invention manufactured as described above is used to prevent forgery and forgery of passport identification information, resident registration card, various identification cards, and the like.

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

Example 1

Production of polyester resin layer

Molecular weight of 21,000 to 22,000 linearly saturated polyester resin (SKI) 27% by weight, fumed silica having a particle diameter of 3㎛ 3% by weight, toluene 40% by weight, methyl ethyl ketone (MEK) 30% by weight of the base mixed A polyester varnish 40 is manufactured in place of the sheet.

Manufacture of Security Ink

 ① In order to prepare varnish for security ink, varnish is prepared by 30% by weight of water-soluble acrylic resin (polymerization degree 800 to 1400), 63% by weight of ethyl alcohol, 5% by weight of ethylene glycol, and 2% by weight of antifoaming agent (ammonia).

 ② A security ink is prepared by mixing 90% by weight of the varnish prepared in ①, 5% by weight of the color sequence SECUTAG (SIMONS, Germany) (5% by weight of SIMONS, Germany) and 5% by weight of ethyl alcohol in a stirrer.

Manufacture of adhesives

The adhesive includes 7% by weight of cellulose resin (Softening Point: 118 to 126 ° C), 15% by weight of linearly saturated polyester resin (molecular weight 26,400), 8% by weight of linearly saturated polyester resin (molecular weight 27,600), and mixed solvent (70% by weight of toluene). % + MEK 30% by weight) 70% by weight to prepare an adhesive (20).

Manufacture of thin film

After applying the polyester varnish 40 to the release paper 50 to about 4㎛ and then printing the security ink with a gravure printing machine to form a printing layer 30, and then apply the adhesive (20) to about 4㎛ To produce a forgery-modulation-type thin film.

Applied Evaluation

After outputting the information identification elements such as photographs and personal information of the passport identity information column on the toner-type photo-transfer-type thin film capable of toner-type photo-transfer manufactured by the above process, the surface is thermally fused (laminated) to FIG. 5. An identification card such as was prepared. A feature of the present invention is that there is no base sheet PVC and PET layer. When the identification card was separated by chemicals (toluene, xylene, acetone, MEK, etc.), the security film was completely dissolved and the shape could not be maintained.

In addition, as a result of forgery / modulation using a color output device, the Secutag effect does not appear, so the fact of the forgery / modulation can be easily detected. Will not.

Example 2

Production of polyester resin layer

25 wt% of linearly saturated polyester resin (SKI) having a molecular weight of 21,000 to 22,000, 5 wt% of fumed silica having a particle diameter of 2 μm, 40 wt% of toluene, and 30 wt% of methyl ethyl ketone (MEK) were mixed. The primary solution polyester varnish 40 is prepared.

Manufacture of Security Ink

 ① In order to prepare varnish for security ink, varnish is prepared by 30% by weight of water-soluble acrylic resin (polymerization degree 800 to 1400), 63% by weight of ethyl alcohol, 5% by weight of ethylene glycol, and 2% by weight of antifoaming agent.

 ② 85% by weight of varnish prepared in ①, 5% by weight of Secutag (color sequence SECUTAG, Germany), 5% by weight of invisible fluorescent pigment (Lumilux CD 702), 5% by weight of ethyl alcohol in a stirrer To prepare.

Manufacture of adhesives

The adhesive is 7% by weight of cellulose resin (Softening Point: 118 to 126 ° C), 15% by weight of linearly saturated polyester resin (molecular weight 26,200), 8% by weight of linearly saturated polyester resin (molecular weight 27,600), and mixed solvent (70% by weight of toluene). % + MEK 30% by weight) 70% by weight of the adhesive 20 is prepared.

Manufacture of thin film

After coating the polyester varnish 40 on the release paper 50 to about 4㎛, the prepared security ink (including SEC tag + invisible fluorescence) is printed by a gravure printing machine to form a printed layer 30-1. Then, by applying the adhesive (20) to about 6㎛ to prepare a forgery, tamper-resistant thin film.

Applied Evaluation

The forgery-proof and forgery-resistant thin film film manufactured by the above process may output information identifying elements such as photographs and personal information in the passport identity information column, and then heat-bond (laminate) the surface to FIG. 5. The same ID was prepared. When the identification card was separated by chemicals (toluene, xylene, acetone, MEK, etc.), the security film was completely dissolved and the shape could not be maintained.

In addition, as a result of forgery / modulation using a color output device, the security and fluorescence effects are not effective, so it is easy to detect forgery and forgery. In the separation test by heat, the security tag itself is regulated as the thin film is deformed. It does not appear in a pattern.

As can be seen through the above embodiment, the present invention outputs photos and personal information by using a toner-type photographic transfer machine on the forgery-modulation-type thin film to replace or alter the personal information of the identity information column. In order to apply chemicals or heat, the base sheet, which is a thin film, is melted or deformed to easily detect forgery and alteration. In addition, the present invention has an effect of disabling forgery / modulation because the security tag and the fluorescent effect do not appear when the forgery / modulation is performed using a color output device according to the photographic transfer method.

Claims (11)

A polyester resin layer coated on a release paper and formed of 3 to 10% by weight of fumed silica; A printing layer formed on top of the polyester resin layer by forming a security ink including 5 to 10% by weight of a cuetag material in a gravure manner; And Formed by coating on top of the printed layer, a variety of security, characterized in that it comprises an adhesive layer containing 15 to 35% by weight of the two types of linear saturated polyester resin having a different molecular weight in the range of 26,000 to 28,000 Forgery and alteration prevention thin film with urea The said polyester resin layer is said fumed silica, 10-30 weight% of polyester resins of 21,000-22,000 molecular weight, 35-45 weight% of C6-C8 aromatic hydrocarbons, and methyl as a mixed solvent. Anti-tamper-proof thin film comprising 25 to 35% by weight of ethyl ketone. The security ink of claim 1, wherein the security ink is prepared by mixing 22 to 38% by weight of water-soluble acrylic resin having a polymerization degree of 800 to 1400, alcohols and 62 to 78% by weight of a glycol-based adjuvant. Forgery, tamper-proof thin film, characterized in that. The said adhesive bond layer is a linear polyester resin of the said composition ratio, 5-10 weight% of cellulose resins with a softening point of 118-126 degreeC, A C6-C8 aromatic hydrocarbon and methyl ethyl ketone as a mixed solvent. A forgery and alteration prevention thin film containing 60 to 80 weight%. The method of claim 4, wherein the mixed solvent of the adhesive layer A forgery-modulation-type thin film, characterized in that the aromatic hydrocarbon having 6 to 8 carbon atoms of 35 to 45% by weight and methyl ethyl ketone are mixed at 25 to 35% by weight to form a range of the mixed solvent. The forgery-modulation according to claim 1, wherein the linearly saturated polyester resin of the adhesive layer is used in an amount of 10 to 20% by weight and a molecular weight of 27,000 to 28,000, in a range of 5 to 10% by weight. Preventive thin film. The method of claim 1, wherein the coating thickness of the polyester resin layer and the adhesive layer is 2 to 20㎛ characterized in that the forgery and alteration prevention thin film. According to claim 1 or 3, wherein the security ink further comprises an invisible fluorescent material in the range of 0 to 5% by weight, the total amount of the secuteg material and the invisible fluorescent material is 10 weight based on the security ink A forgery and alteration prevention thin film, characterized by not exceeding%. The anti-falsification-proof thin film according to claim 8, wherein the invisible fluorescent material is selected from the group consisting of Lumilux CD 702, 704, and 770. The method of claim 1, wherein the softening point of the polyester resin contained in the polyester resin layer and the adhesive layer is 90 to 140 ℃, forgery, tamper-resistant thin film. The forgery-modulation-type thin film according to any one of claims 2, 4 and 6, wherein the aromatic hydrocarbon solvent is toluene.

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