KR101223251B1 - Composition for Preventing Counterfeit and Method for Discriminating Using the Same - Google Patents

Abstract

The present invention relates to an anti-counterfeiting composition and an authenticity identification method using the same, and more particularly, compositions containing single crystal ion-bonding metal oxides having different crystal structures include banknotes, securities, identification cards, secret documents requiring security, and the like. The present invention relates to a composition for preventing forgery and an authenticity identification method using the same, by being able to reliably identify the forgery of the security medium by using X-rays and preventing the forgery by a color output device.
The anti-counterfeiting composition according to the present invention can measure the specific direction pattern and optical properties of the crystal structure by X-ray at the same time, more accurately and precisely can be confirmed whether the forgery at the same time can not be reproduced by radiation effectively prevents forgery modulation It is chemically, thermally and mechanically durable and can be applied to various security applications.

Description

Composition for Preventing Counterfeit and Method for Discriminating Using the Same}

The present invention relates to an anti-counterfeiting composition and an authenticity identification method using the same, and more particularly, compositions containing single crystal ion-bonding metal oxides having different crystal structures include banknotes, securities, identification cards, secret documents requiring security, and the like. The present invention relates to a composition for preventing forgery and an authenticity identification method using the same, by being able to reliably identify the forgery of the security medium by using X-rays and preventing the forgery by a color output device.

Conventionally, various special functional elements have been used to prevent forgery of banknotes, securities, identification cards, secret documents that require security, but banknotes, securities, identification cards, secret documents, etc. Copy forgery using a copying machine, printer, etc., it is difficult for experts to identify the authenticity.

Various methods have been researched and developed to prevent such forgery. For example, by forming a background other than latent images and latent images such as 'invalid' on a paper that needs to be counterfeit as a printing pattern method, and printing the latent image and the background into large dots and small dots. Using the difference between the two colors, a flat latent image technique that reproduces a large dot is reproduced when copying, but a small dot is lost, or a regular optical interference pattern due to a line shows a wave pattern due to optical interference during copying, so that a print and a copy can be distinguished. There is an optical interference technology, such as a plate latent image, optical interference technology, such as radiation forgery prevention technology is used as a way to prevent forgery by a color printer, such as banknotes, securities, identification cards, secret documents.

In addition, in the related art, a technology related to an ink to have various functions for preventing forgery and alteration has been provided by the present applicant as follows.

The ultraviolet reflective intaglio ink composition of Korean Patent No. 344078 and a method of using the same are related to an ultraviolet reflective intaglio ink including an ultraviolet reflective blue pigment and / or a green pigment made of a mixture of metal oxides, and using ultraviolet reflective characteristics. Check the authenticity and to prevent forgery.

The oxidative color changing ink of Korean Patent No. 407253 and a method of using the same are related to an oxidative color changing ink which includes an oxidative color pigment and an invisible fluorescent substance, and when the ink eraser or bleach is used for modulation, The fluorescence effect is lost when the UV light is irradiated to the changed and modulated part, so that it can be easily confirmed by the naked eye and the device.

Special functional ink showing various color wavelengths of Korean Patent No. 407255 and a method of using the same are related to functional inks including phosphors and invisible absorbing materials having different luminescence wavelengths and luminescent wavelengths, By making it look forgery to check whether or not.

The penetrating ink composition of Korean Patent No. 506130 is a color material having an average particle diameter of 0.1 micron or more to prevent forgery and alteration so that the print pattern printed on the front side penetrates the printed object and appears on the back side.

The anti-falsification dichroic ink using the fluorescent material of Korea Patent No. 517160 relates to a dichroic fluorescent ink to include a non-market fluorescent material and an invisible short-wave fluorescent material, which is short-wave (254nm) ultraviolet and long-wave (365nm) It is to prevent the forgery and alteration by causing the color to emit light differently during ultraviolet irradiation.

The various anti-falsification inks provided in the related art are mostly invisible fluorescent materials that identify forgery and alteration using infrared ultraviolet rays, and magnetic inks, time-varying inks, and thermochromic inks using magnetic properties have been developed.

However, materials that can identify forgery and alteration using x-rays have not been developed yet. Even though X-rays are added to the X-rays, most of the fluorescent materials that emit light or emit X-rays are used. There is an urgent need to develop materials and security media that can accurately identify forgery and alteration.

Accordingly, the present inventors have diligently tried to solve the problems of the prior art, and as a result, when a composition containing single crystal ion-bonding metal oxides having different crystal structures is included in the security medium, the specific direction pattern and optical of the crystal structure are determined by X-rays. Since the properties are measured at the same time, it was confirmed that the forgery or not can be accurately identified, and completed the present invention.

The main object of the present invention is an anti-counterfeiting composition capable of simultaneously measuring a specific direction pattern and fluorescence characteristics of the crystal structure by using X-ray and the authenticity identification method that can determine the authenticity of the security medium containing the anti-counterfeiting composition To provide.

In order to achieve the above object, the present invention provides a composition for preventing forgery, which can be identified by X-ray diffraction analysis method and X-ray fluorescence analysis, characterized in that it contains a single crystal ion-bonded metal oxide.

The present invention also provides the anti-counterfeiting security medium, wherein the anti-counterfeiting composition is contained in at least two sites, and each site contains a single crystal ion-bonding metal oxide having a different diffraction pattern of crystal structure. do.

The present invention also comprises the steps of: (a) irradiating the X-rays to the anti-counterfeiting security medium; And (b) measuring an X-ray diffraction pattern and fluorescence of the security medium exposed to the X-ray.

The anti-counterfeiting composition according to the present invention can measure the specific direction pattern and optical properties of the crystal structure by X-ray at the same time, more accurately and precisely can be confirmed whether the forgery at the same time can not be reproduced by radiation effectively prevents forgery modulation It is chemically, thermally and mechanically durable and can be applied to various security applications.

Figure 1 shows the light emission wavelength during X-ray irradiation of magnesium oxide, zinc oxide and tin dioxide contained in the anti-counterfeiting composition according to the present invention.
Figure 2 shows the X-ray diffraction pattern of the single crystal ion-bonded metal oxide contained in the anti-counterfeiting composition according to the present invention, (a) is magnesium oxide, (b) zinc oxide, (c) is tin dioxide.
3 is a mapping image using a pole figure method of the anti-counterfeiting security medium according to the present invention.

The present invention relates to a composition for preventing forgery, which can be identified by X-ray diffraction analysis method and X-ray fluorescence method, characterized in that it contains a single crystal ion-bonded metal oxide in one aspect.

The core idea of the present invention is to utilize a single crystal ion-bonded metal oxide in which the specific directionality and optical properties of the crystal structure are simultaneously measured during X-ray irradiation, and the diffraction pattern of the single crystal ion-bonded metal oxide and the light emitted by the X-ray irradiation The characteristics can be measured at the same time, so that more accurate forgery can be confirmed.

As shown in FIGS. 1 and 2, ion-bonded metal oxides such as magnesium oxide, zinc oxide, and tin dioxide emit ultraviolet rays or visible light during X-ray irradiation, and an X-ray diffraction pattern according to the crystal structure of the ion-bonded metal oxide. This has the characteristic of being changed.

In particular, magnesium oxide was shown to emit light of 200 ~ 300nm, zinc oxide was shown to emit light at 300 ~ 400nm, tin dioxide 300 ~ 500nm, respectively, magnesium oxide, zinc oxide and tin dioxide is different depending on the crystal structure It can be seen that it has an X-ray diffraction pattern.

Therefore, in the present invention, security media such as banknotes (banknotes, checks, etc.), securities, identification cards, secret documents, etc., which require security of single crystal ion-bonded metal oxides, in which the specific orientation and optical properties of the crystal structure are simultaneously measured during X-ray irradiation. To apply.

In the present invention, the single crystal ion-bonded metal oxide may be used as long as it is a single crystal material having ultraviolet light or visible light emission upon X-ray irradiation, and the X-ray diffraction pattern is changed according to the crystal structure, preferably magnesium oxide or oxide. It is selected from the group consisting of zinc, tin dioxide, and alloys thereof, the magnesium oxide is magnesium oxide (100), magnesium oxide (111), magnesium oxide (200), magnesium oxide (220), magnesium oxide ( 222) and the like, and zinc oxide may be zinc oxide (100), zinc oxide (002), zinc oxide (101), zinc oxide (102), zinc oxide (110), or the like, depending on the crystal structure.

In addition, tin dioxide uses tin dioxide 110, tin dioxide 101, tin dioxide 200, tin dioxide 111, tin dioxide 211, or the like, depending on the crystal structure.

These single crystal ion-bonded metal oxides have low internal bonds such as dislocation, vacancy, etc., and because they are oxide-based, have excellent chemical durability, and are stable at high temperatures, and are excellent in chemical, thermal, and mechanical durability. Applicable to security applications.

The single crystal ion-bonded metal oxide includes 0.5 to 2 parts by weight based on 100 parts by weight of the anti-counterfeiting composition. If the amount is less than 0.5 parts by weight based on 100 parts by weight of the anti-counterfeiting composition, the amount of addition is insignificant, so that the diffraction pattern and light emission are weak, and when it exceeds 2 parts by weight, the single crystal ion-bonding metal oxides are entangled with each other. The problem of not being able to emit light at a wavelength may occur.

In addition, the single crystal ion-bonded metal oxide has an average particle size of 50nm to 150nm, when the average particle size is less than 50nm, single crystal ion-bonded metal oxide particles may be entangled with each other, which may cause a problem in that the luminous effect is lowered. In this case, the band gap of the nanocrystals may be widened, thereby causing a problem of disappearing light emission characteristics.

On the other hand, the anti-counterfeiting composition of the present invention may further include a material for improving the security function in addition to the single crystal ion-bonded metal oxide, in particular may further contain an X-ray sensing material. As the X-ray sensing material, gadolinium sulfide is preferable. The gadolinium sulfide may include, but is not limited to, honeywell's Lumilux Green RGS, CWR C 180 R, CD105, CD106, Phosphor's UKL-63, UKL-65D, and the like, and barium sulfate.

The gadolinium sulfide preferably includes 10 to 30 parts by weight with respect to 100 parts by weight of the anti-counterfeiting composition, and when mixed with less than 10 parts by weight with respect to 100 parts by weight of the anti-counterfeiting composition, a problem of inferior X-ray sensing effects may occur. In case of exceeding 30 parts by weight, the problem of insufficient increase in the X-ray detection effect may occur.

The anti-counterfeiting composition according to the present invention is used by being printed or deposited in a specific shape on a security medium, such as banknotes, securities, identification cards, secret documents that require security, or mixed with the raw materials of the security medium in the manufacture of security media. Can be.

In another aspect, the anti-counterfeiting composition is contained in at least two or more parts, each part of the anti-counterfeiting security medium, characterized in that the single crystal ion-bonding metal oxide different in diffraction pattern of the crystal structure is contained It is about.

The security medium refers to banknotes (banknotes, checks, etc.), securities, identification cards, secret documents requiring security, and the like, and generally means all media for preventing forgery and alteration.

The anti-counterfeiting security medium according to the present invention is a composition containing each of the single crystal ion-bonding metal oxide having a different crystal structure for more accurate authenticity identification to each other portion of the security medium by coating, printing, deposition, etc. By being manufactured, the diffraction pattern of the single crystal ion-bonded metal oxide appearing at different sites by X-ray irradiation and the optical characteristics of emitting light in ultraviolet or visible light can be simultaneously measured.

In another aspect, the present invention, (a) irradiating the X-ray to the anti-counterfeiting security medium of claim 5; And (b) measuring the X-ray diffraction pattern and fluorescence of the security medium exposed to the X-ray.

The authenticity identification method according to the present invention manufactures a security medium containing the anti-counterfeiting composition, and then irradiates an X-ray to the security medium, and measures the X-ray diffraction pattern and fluorescence of the security medium exposed to the X-rays of the security medium. Identify authenticity. In this case, the X-ray diffraction pattern is measured by x-ray diffraction method, and the fluorescence is measured by x-ray fluorescence method.

Figure 3 shows a mapping image using the pole figure method of the security medium contained in the anti-counterfeiting composition according to the present invention, because the X-ray diffraction pattern is different according to the crystal direction of magnesium oxide, magnesium oxide 111 is added It can be seen that the part coated with the anti-counterfeiting composition and the part coated with the anti-counterfeiting composition to which the magnesium oxide 100 is added appear in different colors.

The authenticity identification method using the anti-counterfeiting composition according to the present invention should be selectively used according to the use. In other words, when using non-fluorescent papers such as banknotes and securities, fluorescence analysis and X-ray diffraction pattern analysis can be used at the same time, and secret documents for security purposes use ordinary white paper, so that the paper itself contains a fluorescent brightener. Since the accuracy of the analysis is inferior, the measurement method should be chosen selectively.

[ Example ]

Hereinafter, the present invention will be described in more detail with reference to Examples. It is to be understood by those skilled in the art that these embodiments are only for illustrating the present invention and that the scope of the present invention is not construed as being limited by these embodiments.

Example  1: containing a single crystal ion-bonded magnesium oxide according to the present invention Security media manufacturing

After mixing 2wt% of single crystal ion-bonded magnesium oxide in the crystal direction (111), 90wt% of varnish made of rosin-modified phenolic resin, 6wt% of petroleum high boiling point solvent, and 2wt% of cobalt dryer, 3 roll mill 4 to 5 times the dispersion and grinding to prepare the ink.

In this manner, a single crystal ion-bonded magnesium oxide ink having a crystal direction of (222) was prepared. The two inks prepared were printed on different portions of plain paper by using a flat printing system.

Example  2: preparing a security medium containing a single crystal ion-bonded zinc oxide according to the present invention

In the same manner as in Example 1, a single crystal ion-bonded zinc oxide ink having a crystal direction of (100) and a single crystal ion-bonded zinc oxide ink having a crystal direction of (110) were prepared. Printed on different parts of plain paper using the method.

Example  3: Preparation of a security medium containing a single crystal ion-bonded tin oxide according to the present invention

In the same manner as in Example 1, a single crystal ion-bonded tin oxide ink having a crystal direction of (110) and a single crystal ion-bonded tin oxide ink having a crystal direction of (211) were prepared. The two inks prepared were printed on different portions of paper using a flat printing system.

Experimental Example  1: Authenticity identification through fluorescence analysis

X-ray fluorescence (MonoCL3, Gatan) was printed on the portions where the monocrystalline ion-bonded magnesium oxide ink, the monocrystalline ion-bonded zinc oxide ink, and the monocrystalline ion-bonded tin oxide ink prepared in Examples 1, 2, and 3 were printed. ) Was measured.

As a result, as shown in Figure 1, when using a single crystal ion-bonded magnesium oxide ink, the same spectrum of 200 ~ 300nm was confirmed regardless of the crystal direction (111 or 222), using a single crystal ion-bonded zinc oxide ink In this case, the same spectrum of 300-400 nm was observed regardless of the crystal direction (100 or 110), and when the single crystal ion-bonded tin oxide ink was used, the same spectrum of 350-450 nm was observed regardless of the crystal direction (110 or 211). Confirmed.

Experimental Example  2: x-ray Diffraction analysis  Authenticity identification

X-ray diffraction (X'pert) was used to prepare the printed portions of the monocrystalline ion-bonded magnesium oxide ink, the monocrystalline ion-bonded zinc oxide ink, and the monocrystalline ion-bonded tin oxide ink prepared in Examples 1, 2, and 3. -PRO, PANalytial) was used to measure the diffraction pattern spectrum.

As a result, as shown in (a), (b) and (c) of FIG. 2, different x-ray diffraction pattern spectra were formed, respectively, as shown in (a), (b) and (c) of FIG. In addition, it was found that a mapping program using the pole figure method can be used to obtain images represented in different colors according to the crystal direction.

Having described specific portions of the invention in detail, those skilled in the art will appreciate that these specific embodiments are merely preferred embodiments and that the scope of the invention is not limited thereby will be. It is therefore intended that the scope of the invention be defined by the claims appended hereto and their equivalents.

Claims (9)

An anti-counterfeiting composition identifiable by X-ray diffraction analysis and X-ray fluorescence analysis, characterized in that it contains a single crystal ion-bonded metal oxide having an average particle size of 50 nm to 150 nm.
The anti-counterfeiting composition according to claim 1, wherein the single crystal ion-bonded metal oxide is selected from the group consisting of magnesium oxide, zinc oxide, tin dioxide, and alloys thereof.
delete The anti-counterfeiting composition according to claim 1, wherein the single crystal ion-bonding metal oxide comprises 0.5 to 2 parts by weight based on 100 parts by weight of the anti-counterfeiting composition.
The anti-counterfeiting composition of any one of claims 1, 2 or 4 is contained in at least two sites, each of which contains a single crystal ion-bonding metal oxide having a different diffraction pattern of crystal structure. Anti-counterfeit security media characterized in that.
The anti-counterfeiting security medium of claim 5, wherein the anti-counterfeiting security medium is selected from the group consisting of bank notes, securities, identification cards, and secret documents.
An authenticity identification method of a security medium, comprising the following steps:
(a) irradiating the X-rays to the anti-counterfeiting security medium of claim 5; And
(b) measuring the X-ray diffraction pattern and fluorescence of the security medium exposed to the X-rays.
8. The method of claim 7, wherein the x-ray diffraction pattern of step (b) is an x-ray diffraction method.
The method of claim 7, wherein the fluorescence of step (b) is an authenticity identification method, characterized in that using the x-ray fluorescence (x-ray fluorescence) method.

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