KR101345874B1 - Anti-copying Security Documents and method for making the same - Google Patents

Abstract

The present invention relates to a security paper for copy protection and a method of manufacturing the same. More specifically, a printed copy of a printed matter using a security paper such as banknotes, securities, identification cards, security documents, and various applications, etc. (color, black and white) In the case of copying, it relates to a copy protection security paper and its manufacturing method characterized by the fact that the contents of the printed matter are displayed in the front black or various pattern forms and the contents of the original text cannot be discriminated.

Description

Anti-copying Security Papers and Method for Making the Same

The present invention relates to a security paper for copy protection and a manufacturing method thereof.

With the recent development of computer peripherals, the resolution of high-resolution digital color copiers and color printers has improved, so banknotes, securities, passports, ID cards, cards, and various certificates for security purposes such as copiers and printers By copying and falsifying easily, the problem used for various crimes continues.

Precision printing technology using special materials or special inks such as intaglio printing, barcodes, holograms, silver, fine characters, fluorescent ink, magnetic ink, partially exposed hidden lines, front and back printing, etc. This has been used. However, in the case of special printing, forgery may simply be difficult, but forgery cannot be prevented fundamentally. This is due to the rapid development of high-resolution color copiers and color printers, which are computer peripherals, along with the development of counterfeit technology by specialized forging organizations.

Thus, considering that counterfeiting is being performed for the public's lack of knowledge or attention that can easily identify the authenticity, the problem can be solved if there is a way to make it easy for anyone to identify the counterfeit. .

Therefore, many anti-counterfeiting methods have been studied. In the past, anti-counterfeiting methods using a special ink, such as metal powder and fluorescent ink, have been applied, but these methods are important for money and securities. Not only was it impaired as a document, it was not effective in preventing copy counterfeiting, and it was easy to purchase special ink on the market, which was less effective.

Also, since then, anti-counterfeiting papers have been produced to make latent images appear when copying into large dots and small dots, full lines and dots. For example, Japanese Patent Laid-Open No. 58-47708 prints a latent image such as "VOID" on the surface of a sheet with a large dot, and the background surface other than the latent image is printed with a small dot. Since the latent image of the large halftone dot is reproduced and displayed, but the background surface of the small halftone dot is not reproduced, a color difference between the two colors is generated, and thus the latent image of the character can be visually confirmed.

In addition, in order to prevent the latent image of the character from being identified by the naked eye, when printing the latent image of the character and the background, a dazzle pattern is inserted into the photo work process so that the latent image of the character and the background are naturally connected. However, in the above invention, in order to increase the effect of the appearance of the latent image during copying, it is preferable to maximize the size difference between the halftone constituting the latent image and the background constituting the background, but when the size difference of the halftone is too large, a dazzle pattern is applied. Even if there is a problem in that the latent image of the character on the paper before copying is lost, the practicality of preventing the forgery of the paper is lost, and there is a drawback that the shades must be adjusted manually according to the printing plate during film production.

In addition, conventionally, after recording information on the copy protection film, it is adhered to the surface of the document so that it cannot be copied by a copying machine (color, black and white), but when pasting this kind of copy protection film on the document, the original information There was a flaw that was difficult to check the records of.

In order to reinforce this defect, Japanese Patent Laid-Open Publication No. 2005-225088 discloses a substrate and a release layer by thermally transferring a film on which a release layer, a protective layer, a metal deposition layer, and an adhesive layer are sequentially formed on a substrate in a manufacturing process for copy protection. Disclosed copy-protected paper, but this is a complex manufacturing process, such as the formation of a release layer and thermal transfer on the substrate, and there is a disadvantage that the quality defects occur as well as the disadvantage of difficult to implement a variety of security elements.

Thus, in the present invention, the resin layer was formed directly on the base paper, and the above-described problems were solved by depositing a metal thereon, and the present invention was completed based on this.

Therefore, one aspect of the present invention is that the laser toner and inkjet printers can be printed, and various security elements can be implemented to copy the printed security paper. It is to provide a copy protection paper that is not recognized.

Another aspect of the present invention is to provide a method for producing the copy paper in an economical manner.

In order to achieve the above aspect, the anti-copy protection paper of the present invention has a structure in which a metal layer, a metal deposition layer, and a protective layer, which are capable of metal deposition, are sequentially stacked on one surface of a base paper, wherein the resin layer is 60 ° glossy. It is characterized in that the value has a glossiness of 350 gloss units (GU) or more.

In the anti-radiation security paper of the present invention, the resin layer capable of metal deposition is composed of a mixed resin of a nitro cellulose resin and a linear polyester resin, or a polyurethane resin, and has a thickness of 0.5 to 5 µm. .

In the copy protection security paper of the present invention, the metal of the metal deposition layer is characterized in that selected from aluminum, silver, copper, tin or alloys thereof.

In the protective paper for radiation protection of the present invention, the protective layer is a hydrophobic resin which is a resin for laser toner, cellulose acetate or polyvinyl foam selected from a water-soluble polyurethane resin or an acrylic resin, and hydrophilic resin which is polyvinylpyrrolidone or polyethyloxazoline. It is characterized by consisting of one of the resin for inkjet resin, or a mixed resin of a polyvinyl ether and polyvinyl alcohol resin.

In the copy protection security paper of the present invention, the base sheet is characterized in that the label paper or art paper.

In the copy protection security paper of the present invention, the security paper further comprises a mat layer formed on the other side of the base paper, the mat layer is characterized in that consisting of a water-soluble polyurethane resin containing titanium dioxide or calcium carbonate do.

According to another aspect of the present invention, there is provided a method of manufacturing a security paper for copy protection, comprising: forming a resin layer capable of depositing a metal by coating a resin capable of depositing a metal with gravure printing or a coater on one surface of a base sheet; Vacuum depositing a metal on the resin layer to form a metal deposition layer; And sequentially laminating a protective layer on the metal deposition layer, wherein the resin layer has a glossiness of 60 gloss values of 350 gloss units (GU) or more.

In the manufacturing method of the present invention, the resin layer capable of metal deposition is composed of a mixed resin of a nitro cellulose resin and a linear polyester resin, or a polyurethane resin, and 0.5 to 5 탆 on a part or all of one surface of the base paper. Characterized in that formed to a thickness.

In the production method of the present invention, the metal is selected from aluminum, silver, copper, tin or alloys thereof.

In the production method of the present invention, the protective layer is a hydrophobic resin which is a resin for laser toner, cellulose acetate or polyvinyl foam selected from a water-soluble polyurethane resin or an acrylic resin, and a hydrophilic resin which is polyvinylpyrrolidone or polyethyloxazoline. It is characterized in that it is formed of one of a mixed resin, or an inkjet resin which is a mixed resin of polyvinyl ether and polyvinyl alcohol resin.

In the manufacturing method of the present invention, the base sheet is characterized in that the label paper or art paper.

In the production method of the present invention, the method further comprises the step of forming a mat layer made of a water-soluble polyurethane resin containing titanium dioxide or calcium carbonate on the other side of the base paper.

The copy protection security paper according to the present invention can be read visually by printing characters and patterns when applied to security products and security documents, but is black in output devices (color copying machines, monochrome copying machines, various printers). As the original text cannot be read as it is reproduced, the effect of preventing forgery by copying is excellent.

1 is a cross-sectional view schematically showing the structure of a security paper designed to be suitable for a laser toner printer according to the present invention.
2 is a cross-sectional view schematically showing the structure of a security paper designed to be suitable for an inkjet printer according to the present invention.
3 is a state diagram schematically illustrating a state in which a security paper coated with a resin layer on a base paper and having a metal layer deposited thereon is copied from a copying machine (color, black and white) according to the present invention.
Figure 4 is a state diagram schematically showing a state in which the resin layer is patterned on the base paper and coated with a gloss and matte resin, respectively, and then the security paper on which the metal layer is entirely deposited is copied from a copying machine (color, black and white) according to the present invention. .
FIG. 5 is a state diagram schematically illustrating a state copied by a copying machine (color, black and white) after printing a character on the security paper of FIG.
FIG. 6 is a state diagram schematically illustrating a state copied by a copying machine (color, black and white) after printing a character on the security paper of FIG.
FIG. 7 is a state diagram schematically illustrating a state in which an ID card or various applications are printed in the method of FIG. 4 and then copied in a copying machine (color, black and white).

Before describing the present invention in detail, the terms or words used in the present specification and claims should not be limited to the ordinary or dictionary meanings, but properly define the concept of terms in order to explain the invention in the best way. Based on the principle that it can be done, it should be understood that it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the constitution of the embodiments described in the present specification is merely a preferred example of the present invention, and does not represent all the technical ideas of the present invention, so that various equivalents and variations And the like.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

As described above, in the present invention, when the printed matter printed on the printer is copied to a copying machine (color, black and white) using security paper such as banknotes, securities, ID card, security document, and various applications, the printed content is black or white. The present invention relates to a security paper for preventing copying and a method of manufacturing the same, which are partially displayed in black such as diagonal lines and mosaics, and which cannot determine the contents of the original text.

1 and 2 are cross-sectional views schematically showing the structure of the security paper according to the present invention, which is designed to be suitable for a laser toner printer or an inkjet printer, respectively. The resin layer 30 capable of depositing metal on one surface of the base paper 40 is shown. , The metal deposition layer 20 and the protective layers 10 and 15 are sequentially stacked.

According to the present invention, the base paper 40 is generally a label paper or art paper (typically, about 90 g / ㎡), but is not limited to this, one side surface of the base paper 40 is deposited metal Possible resin layer 30 is formed.

The resin layer 30 capable of metal deposition may include a mixed resin of a nitro cellulose resin and a linear polyester resin, or a gloss resin layer in which a polyurethane resin is dissolved in an organic solvent (such as toluene or methyl ethyl ketone (MEK)), or A hybrid resin layer (see Fig. 4), which is optionally patterned with a gloss resin and a matte resin, is coated with gravure printing or a coater on the base paper 40 to a thickness of about 0.5 to 5 탆. At this time, if the thickness is less than 0.5㎛ may be difficult to deposit metal, if it exceeds 5㎛ tends to form wrinkles on the paper by the temperature of the printing process (toner copier temperature 190 ~ 240 ℃).

The glossiness of the metal deposition layer 20 deposited on the resin layer 30 capable of metal deposition may vary depending on the mixing ratio of the nitro cellulose resin and the linear polyester resin, and thus, adjusts the mixing ratio to make the gloss resin layer and the matte. A resin layer can be formed. For example, when the amount of linear polyester resin used is relatively low, the glossiness of the metal deposition layer 20 may be increased. In the present invention, the glossiness is measured using a micro-TRI-gloss meter according to ASTM D 523, the measured 60 ° gloss value is 350 gloss units (GU) or more, preferably 350 to 700, more Preferably it is glossiness of 450-600.

In this way, the metal is deposited (deposition thickness: 200 to 600 Pa) in the vacuum evaporator to maintain the glossiness (350 GU or more). The metal of the metal deposition layer 20 usable in the present invention is selected from aluminum, silver, copper, tin or alloys thereof, and aluminum is preferred in view of workability and economics. The deposition thickness of the metal is preferably 200 to 600 Pa in order to maintain the glossiness of 350 GU or more, preferably in the range of 350 to 700.

The protective layer according to the present invention may be formed of other components depending on whether the device using the security paper is a laser toner printer or an inkjet printer. For example, for the laser toner, a resin layer 10 formed by dissolving a water-soluble polyurethane resin or an acrylic resin in alcohol and coating in a gravure printing machine may be configured, or for inkjet, a cellulose acetate or polyvinyl foam A resin layer obtained by mixing a hydrophobic resin such as hydrophobic resin such as polyvinylpyrrolidone or polyethyloxazoline, or a mixed resin layer 15 of polyvinyl ether and polyvinyl alcohol resin may be coated on a gravure printing machine. have. This is possible because the protective layers 10 and 15 are formed by simply coating the protective layers 10 and 15 on the metal deposition layer 20 without a process such as metal deposition on the protective layer.

On the other hand, according to the present invention, the mat layer 50 for preventing the curling phenomenon when printing on the other surface of the base paper 40 can be formed by coating in a gravure printing machine. The mat layer 50 is typically composed of a gravure ink layer mixed with a polyurethane resin, titanium dioxide or calcium carbonate, wax, alcohol, and the like.

3 is an embodiment of the present invention, after depositing an aluminum metal on the gloss resin layer 30, coating the protective layer (10 or 15), black when copying in a copying machine (color, black and white) Show as (70-a). Figure 4 is another embodiment of the present invention, after coating the glossy resin layer and the matte resin layer in a diagonal arrangement, when the aluminum is deposited all over the deposition layer (60 and 65) is formed, in the copier (color, black and white) It is shown that black (70-a) in the aluminum deposition layer 60 deposited on the glossy resin during radiation, and gray (70-b) in the aluminum deposition layer 65 deposited on the matt resin.

5 is another embodiment of the present invention, by using a printer on the security paper of Figure 3, when printing a copy in the copier (color, black and white) by printing a secure document printed with letters or numbers 80 is black (70- shows the condition indicated by a). 6 is another embodiment of the present invention, by using a printer on the security paper of Figure 4, when printing a copy document (color, monochrome) by printing a security document printed with letters or numbers 80, the glossy resin layer In the aluminum deposition layer 60 deposited on the black (70-a) is shown, and the aluminum deposition layer 65 deposited on the matt resin layer 65 is shown to appear gray (70-b). In addition, Figure 7 is another embodiment of the present invention, name 70-1, social security number (70-2), seal and signature (70-3) that is a specific part of the identification card or various applications, etc. in the manner of FIG. After applying the technique of the present invention to the) site, the state 70-a copied in the copier (color, black and white) is shown.

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

Example 1

1st process

25% by weight of nitro cellulose resin (MP-45), 2% by weight of linear saturated polyester (ES-100), 0.3% by weight of wax (523-XF), and 72.7% by weight of mixed solvent (8: 2 in toluene and MEK weight ratio) Mixing to prepare a resin for the gloss.

Second Step

30% by weight of polyurethane varnish (NPA-6500), 4% by weight of curing agent (NH 160), 65.9% by weight of ethyl alcohol, and 0.1% by weight of wax (620-XXF) were mixed to prepare an aqueous solution 10 for a protective layer in a stirrer. .

Third step

50% by weight of polyurethane varnish (NPA-6500), 40% by weight of titanium dioxide (TiO ₂ ), 0.3% by weight of wax (523-XF), antifoaming agent (BYK-022), antistatic agent (JI-65) 1.5% by weight and 8.2 wt% of ethyl alcohol was mixed to prepare a white ink 50 for a mat in a ball mill.

Fourth step

After applying the primary gloss aqueous solution 30 prepared in the first step to the roll label 40 with a gravure printing press about 1.5 μm, the surface of the aluminum metal was formed with a thickness of 400 kPa in a vacuum evaporator to have a gloss of about 450 Retained and deposited. Next, the protective layer 10 for the third laser toner prepared in the second process was coated with a gravure printing press of about 0.5 μm, and then the white ink prepared in the third process with the mat layer 50 was about 2 μm. It was applied in a thickness to prepare a security paper for a laser toner having a structure as shown in FIG.

After printing on the laser toner printer using the security paper, and then copying in a copying machine (black and white), the results as shown in FIG.

Example 2

1st process

25% by weight of nitro cellulose resin (MP-45), 2% by weight of linear saturated polyester (ES-100), 0.3% by weight of wax (523-XF), and 72.7% by weight of mixed solvent (8: 2 in toluene and MEK weight ratio) To prepare a glossy aqueous solution.

Second Step

78.6% by weight of acrylic copolymer having a glass transition temperature of 85, a hydroxyl group of 40 (mgKOH / g) and an acid value of 45 (mgKOH / g), a mixed solvent of methanol and methyl cellulose solution (5: 5) 16.4% by weight, polyvinylpi Resin 15 for inkjet was prepared by adding 4.9% by weight of Rollidone (ISP, PVP K-90) and 0.1% by weight of silica (mizukasil P-50).

Third step

50% by weight of polyurethane varnish, 40% by weight of titanium dioxide (TiO ₂ ), 0.3% by weight of wax (523-XF), 0.5% by weight of antifoaming agent (BYK-022), 1.5% by weight of antistatic agent (JI-65) and ethyl alcohol 7.7% by weight of the mixture to prepare a white ink 50 for the mat in a ball mill.

Fourth step

After applying the primary gloss aqueous solution 30 prepared in the first step to the roll label 40 with a gravure printing press about 2 μm, the surface of the aluminum metal was formed with a thickness of 400 mm in a vacuum evaporator to have a gloss of about 450 degrees. Retained and deposited. Next, the protective layer 15 for the third laser toner prepared in the second process was coated with a gravure printing press of about 0.5 μm, and then the white ink prepared in the third process with the mat layer 50 was about 2 μm. It was applied in a thickness to prepare a security paper for an inkjet having a structure as shown in FIG.

After printing on the inkjet printer using the security paper, and then copying in a copying machine (black and white), the same results as in FIG.

Example 3

1-1 process

20% by weight of nitro cellulose resin (MP-45), 7% by weight of linear saturated polyester (ES-100), 0.3% by weight of wax (523-XF), and 72.7% by weight of mixed solvent (8: 2 in toluene and MEK weight ratio) To prepare a matte aqueous solution by mixing.

1-2th process

20 wt% nitro cellulose resin (MP-45), 7 wt% linear saturated polyester (ES-100), 0.3 wt% wax (523-XF), and mixed solvent (8: 2 in toluene and MEK weight ratio) 72.7 The weight percent is mixed to prepare a matt resin.

Second Step

30% by weight of polyurethane varnish (NPA-6500), 4% by weight of curing agent (NH 160), 65.9% by weight of ethyl alcohol, and 0.1% by weight of wax (620-XXF) to prepare a protective layer resin 10 for a laser toner.

Third step

Polyurethane varnish (NPA-6500) 50% by weight, titanium dioxide (TiO ₂ ) 40% by weight, wax (523-XF) 0.3% by weight, antifoaming agent (BYK-022) 0.5% by weight, antistatic agent (JI-65) 1.5 A white ink 50 for a mat is prepared in a ball mill by mixing the wt% and 7.7 wt% of ethyl alcohol.

Fourth step

After applying the gloss resin and the matte resin prepared in the first step to the roll label paper 40 in a diagonal pattern as shown in FIG. 4 with a gravure printing machine, the thickness of the aluminum metal was 400 mm by using a vacuum evaporator. The surface was constructed, and the glossiness of the resin for gloss was maintained at about 450 and deposited. Next, the protective layer 10 for the third laser toner prepared in the second process was coated with a gravure printing press of about 0.5 μm, and then the white ink prepared in the third process with the mat layer 50 was about 2 μm. It was applied in a thickness to prepare a security paper for a laser toner having a structure as shown in FIG.

After printing on the laser toner printer using the security paper, and then copying in a copying machine (black and white), the same results as in FIG.

10: protective layer for laser toner 15: protective layer for inkjet
20: metal (aluminum) deposited layer 30: a resin layer capable of metal deposition
40. Basic paper (label or art paper (90g / m²)
50: mat layer
60: metal deposition layer deposited on the glossy resin layer
65: metal deposition layer deposited on the matt resin layer
70-a: Copy of security paper with metal deposition layer deposited on gloss resin layer
70-b: Copy of security paper with metal deposition layer deposited on matt resin layer
70-1, 70-2, and 70-3: Privacy 80: Letters and / or numbers
100: security paper

Claims (12)

In the radiation resistant security paper having a structure in which a metal layer, a metal deposition layer, and a protective layer capable of metal deposition on one side of the base paper are sequentially stacked,
Here, the resin layer is made of a mixed resin of a nitro cellulose resin and a linear polyester resin, or a polyurethane resin, the radiation protection security paper having a glossiness of 60 gloss value of 350 gloss unit (GU) or more.
The method according to claim 1,
The resin layer capable of metal deposition is a security paper, characterized in that the thickness of 0.5 ~ 5㎛.
The method according to claim 1,
The metal of the metal deposition layer is a security paper, characterized in that selected from aluminum, silver, copper, tin or alloys thereof.
The method according to claim 1,
The protective layer is a mixed resin of a resin for laser toner selected from a water-soluble polyurethane resin or an acrylic resin, a hydrophobic resin which is cellulose acetate or polyvinyl foam, and a hydrophilic resin which is polyvinylpyrrolidone or polyethyloxazoline, or polyvinyl ether A security paper, characterized in that composed of one of the inkjet resin that is a mixed resin of polyvinyl alcohol resin.
The method according to claim 1,
The basic paper is a security paper, characterized in that the label or art paper.
The method according to claim 1,
The security paper further comprises a mat layer formed on the other side of the base paper, the mat layer is a security paper, characterized in that consisting of a water-soluble polyurethane resin containing titanium dioxide or calcium carbonate.
In the method of manufacturing a copy protection security paper having a structure in which a resin layer, a metal deposition layer, and a protective layer capable of metal deposition on one side of a base sheet are sequentially stacked,
Forming a resin layer capable of depositing a metal by coating a resin capable of depositing a metal with gravure printing or a coater on one surface of the base sheet;
Vacuum depositing a metal on the resin layer to form a metal deposition layer; And
Sequentially depositing a protective layer on the metal deposition layer,
Here, the resin layer is made of a mixed resin of a nitro cellulose resin and a linear polyester resin, or a polyurethane resin, a method of producing a protective paper for a copy protection security paper having a glossiness of more than 350 gloss unit (GU) 60 ° gloss value.
The method of claim 7,
The resin layer capable of metal deposition is formed on a part or the whole of one side of the base paper to a thickness of 0.5 ~ 5㎛.
The method of claim 7,
The metal is selected from aluminum, silver, copper, tin or alloys thereof.
The method of claim 7,
The protective layer is a mixed resin of a resin for laser toner selected from a water-soluble polyurethane resin or an acrylic resin, a hydrophobic resin which is cellulose acetate or polyvinyl foam, and a hydrophilic resin which is polyvinylpyrrolidone or polyethyloxazoline, or polyvinyl ether Method for forming one of the inkjet resin which is a mixed resin of polyvinyl alcohol resin.
The method of claim 7,
And the base sheet is a label sheet or an art sheet.
The method of claim 7,
The method further comprises forming a mat layer made of a water-soluble polyurethane resin containing titanium dioxide or calcium carbonate on the other side of the base paper.

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