KR101316933B1 - Multi Functional Security Ink - Google Patents

Abstract

The present invention relates to a multi-functional fusion security ink containing both the visual identification security element and the invisible security element at the same time, the characteristics of the visual identification security element is not impaired, in detail, the security ink according to the present invention is barium A tin compound is prepared by mixing and baking 80 to 120 moles and 0.1 to 10 moles of an alkali metal salt compound, which is a salt of at least one selected from Li, Na, K, Rb, Cs and Fr, with respect to 100 moles of the compound. An invisible light emitter that is an alkali metal ternary oxide and a time-varying pigment.

Description

Multi Functional Convergence Security Ink {Multi Functional Security Ink}

The present invention relates to a multi-functional convergence security ink used in various security products, including securities and identification cards, in detail, containing both visual identification security element and invisible security element, the characteristics of the visual identification security element The present invention relates to an ink for multifunctional convergence security which is not impaired.

Various cards such as cash cards and credit cards, passports and insurance certificates, various certificates such as vehicle driver's licenses, industrial product materials to which information such as checks and securities, banknotes, brand products, manufacturing history, etc. are given, production sites and production times Food labels, etc. to which information is given may have a possibility of counterfeiting or tampering. As forgery or tamper-resistant technology of such an article, forgery, despite the installation of a strong overt anti-counterfeiting element such as time-varying ink, diffraction time-varying imagery (DOVID), such as Korea Patent Publication No. 2003-0058346 Cases are constantly increasing. This general identification element has an advantage that is easily readable by the general public, but it can also be seen that it is easily exposed to forgery, and may partially or completely mimic the element according to the development or distribution channel of the forgery technology. Therefore, in order to effectively prevent counterfeiting, it is necessary to complement each other's strengths and weaknesses by using a complex application of elements that remain invisible and invisible by the general identification.

Republic of Korea Patent Publication No. 2003-0058346

An object of the present invention is to provide a security ink containing a time-varying security element and a non-visible security element at the same time, security that does not impair the ability to overt by the time-varying security element by the invisible security element It is to provide an ink, and to provide a security ink that can detect the invisible security element through a UV-based commercially available with a time-varying security element and a silicon-based photodetector excellent in detection strength with low cost.

Convergence security ink according to the present invention is 100 to 100 moles of the barium compound tin compound is 80 to 120 moles and 0.1 to 10 moles of alkali metal salt compound is a salt of an alkali metal selected from at least one selected from Li, Na, K, Rb, Cs and Fr And an invisible light-emitting body and a time-varying pigment which are prepared by mixing and calcining to absorb light in the ultraviolet region and emit light in the infrared region.
In the security ink according to an embodiment of the present invention, the alkali metal of the barium-tin-alkali metal ternary oxide is lithium or sodium.

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In one embodiment of the present invention, the invisible light emitter contained in the security ink includes a light emitter for emitting light having a wavelength of 370 to 390 nm as excitation light, 935 to 940 nm wavelength.

The security ink according to an embodiment of the present invention contains 1 to 10% by weight of the invisible light emitter, and more preferably 1 to 5% by weight of the invisible light emitter.

Security ink according to an embodiment of the present invention may contain 10 to 20% by weight of the time-varying pigment.

The security ink according to an embodiment of the present invention includes a solvent evaporative screen printing ink, and may contain 50 to 70 wt% of a resin and 15 to 25 wt% of a solvent.

The present invention includes a security paper provided with a coating film to which the above-mentioned security ink is applied and dried.

Since the security ink according to the present invention contains an invisible light emitter having an extremely excellent luminous intensity, it is possible to implement a non-visible security element with a small amount of invisible light emitter, thereby providing an optical characteristic of a time-varying pigment that gives general identification ability. It has the advantage of providing general identification security elements and invisible security elements to security demanded products without impairing them.In addition, by containing extremely small amount of invisible light emitter, adjustment of viscosity required in printing, especially screen printing It is possible to manufacture security ink easily and at low cost, and it is excited by light in the ultraviolet region and has light emission characteristics in the infrared region, so that it is possible to use commercially available ultraviolet LED and low-cost silicon-based photodetector with excellent detection intensity. Invisible security element can be detected and read. As a non-visible security element has an invisible light emitting element having excellent device sensitivity as an element that can be read by the device while being protected, forgery and tamper prevention can be effectively prevented by a complex application of security elements having different security characteristics from each other. It can be used for special prints.

1 is a view showing the measurement of the excitation and emission characteristics of the light emitting body produced in one experimental example according to the present invention,
2 is a view showing in more detail the excitation and light emission characteristics of the light emitting body produced in one experimental example according to the present invention,
3 is a view illustrating excitation and light emission characteristics of a light emitting body manufactured in one example of manufacture according to the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In general, the nomenclature used herein and the experimental methods described below are well known and commonly used in the art. Hereinafter, the present invention will be described in detail.

Convergence security ink according to the present invention is 100 to 100 moles of the barium compound tin compound is 80 to 120 moles and 0.1 to 10 moles of alkali metal salt compound is a salt of an alkali metal selected from at least one selected from Li, Na, K, Rb, Cs and Fr And an invisible light-emitting body and a time-varying pigment which are prepared by mixing and calcining to absorb light in the ultraviolet region and emit light in the infrared region.

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The invisible light emitter may be prepared by pulverizing after mixing the barium compound, tin compound and alkali metal salt compound, and the barium compound may be barium carbonate, barium sulfate, barium chloride or a mixture thereof. The tin compound may be tin oxide, tin chloride or a mixture thereof. The alkali metal salt compound may be a carbonate, an oxide, a hydroxide, or a mixture of alkali metals. The tin compound may be 80 to 120 moles relative to 100 moles of the barium compound, and the alkali metal salt compound may be 0.1 to 10 moles with respect to 100 moles of the barium compound. The raw material containing the barium compound, tin compound and alkali metal salt compound may be heat treated at 1400 to 1500 ° C. for 9 to 12 hours, and the heat treatment may be performed in air.

The security ink according to an embodiment of the present invention contains an invisible light emitter containing lithium or sodium as an alkali metal, through which the invisible light emitter is based on the emission intensity of the light emitter not containing alkali metal. It may have an enhanced strength of at least 8%, substantially 8-13%.

In the security ink according to an embodiment of the present invention, the invisible light emitter is characterized by emitting light of 935 to 940 nm wavelength as excitation light, light of 370 to 390 nm wavelength, accordingly, It is possible to excite an invisible light emitter using an ultraviolet LED, and to detect and read an invisible security element using a silicon-based photodetector having a low cost and excellent detection intensity.

Security ink according to an embodiment of the present invention may contain 1 to 10% by weight of the invisible light emitter, with the time-varying pigment used as a general identification security element, more specifically 1 to 5% by weight of It may contain an invisible light emitter.

Existing invisible light emitting body does not have excellent device sensitivity and should contain at least 20% by weight in order to show its function, which when used in combination with the time-varying security element, weakens the function of the time-varying security element. do.

In particular, in order to easily manufacture a time-varying security element having a predetermined pattern and shape using a printing method, it is necessary to maintain the content of particulate matter at about 20% by weight. There is a practically difficult problem in manufacturing a multifunctional security element fused with the element.

However, the security ink according to an embodiment of the present invention can be detected using a silicon-based photodetector having excellent detection intensity due to the excellent light emission intensity of the above-mentioned invisible light emitter and the light emission characteristic of 935 to 940 nm wavelength. Accordingly, even if it contains less than 10% by weight, more specifically 5% by weight of the invisible light emitter that does not deteriorate the function of the time-varying security element, which is an identifiable strong general identification anti-falsification security element, Has the advantage that the implementation and detection of security elements in the city.

In the security ink according to an embodiment of the present invention, the average particle diameter of the invisible light emitter may be appropriately adjusted according to a certain letter, number, code, symbol, shape or size of the security area of the image to which the ink is applied. Can be.

Security ink according to an embodiment of the present invention may contain 10 to 20% by weight of the time-varying pigment with the invisible light emitter.

Due to the extremely low content of the invisible light emitter described above, as the function of the time varying security element is prevented from being deteriorated by the invisible light emitter, a small amount of time varying pigment may be used to obtain a predetermined level of general identification function, and the security ink. Since the content of the whole particles contained in the reduced content can be easily printed in fine lines or high shape, in particular, screen printing can be prevented in the printing using screen printing has the advantage that can be printed at a very high speed.

In the security ink described above, the time-varying pigment may be a time-varying pigment commonly used in the field of oil certificates or security products. For example, the time-varying pigment is Merck Colorcrtypt OCP, SICPA OVI^?, KOMSCO KCSI Can be used.

The security ink described above may further contain a solvent, resin or additive commonly used for viscosity control and physical strength (bonding force) in the printing ink field.

Security ink according to an embodiment of the present invention includes a solvent evaporation screen printing ink, wherein the ink may contain 50 to 70% by weight of the resin and 15 to 25% by weight of the solvent.

The resin includes, but is not limited to, polyvinyl chloride resin (weight average molecular weight 10,000 to 100,000), urethane-modified alkyd resin (weight average molecular weight 10,000 to 50,000) and mixtures thereof, and the solvent is not limited to alcohol-based ether solvents, Aliphatic petroleum solvents or mixtures thereof; the alcohol ether solvents include, but are not limited to, ethoxypropionic acid ethyl esters, dipropylene glycol monoethyl ethers, or mixtures thereof; Aliphatic petroleum solvents having a boiling point of ˜320 ° C .;

The present invention includes a security paper provided with a coating film coated with the above-described ink and dried, the security paper is a variety of cards, such as deeds including cash bills, bank notes, checks, securities or bonds, or cash cards or credit cards And a variety of certificates such as a passport or insurance certificate, a vehicle driver's license, an industrial product material to which information such as a brand product and a manufacturing history are given, and a food label to which information such as a production site or a production time is given.

(Experimental Example 1)

1.9537 g (0.0099 mol) of BaCO _3, 1.5071 g (0.0100 mol) of SnO ₂ , and 0.0286 g (0.0001 mol) of Na ₂ CO ₃ · 10H ₂ O, respectively, were weighed and uniformly mixed, and then charged into an alumina crucible in an atmosphere. After raising to 1,450 ℃ over 3 hours at 10 hours and then cooled to room temperature to prepare a light emitting body.

1 and 2 show the results of measuring excitation and emission spectra and intensity using a fluorescence spectrophotometer after grinding the prepared light emitting body using a mortar and pestle.

(Experimental Example 2)

1.9734 g (0.0099 mol) of BaCO _3, 1.5071 g (0.0100 mol) of SnO ₂ , and 0.0286 g (0.0001 mol) of Li ₂ CO ₃ were respectively weighed and uniformly mixed. After raising to 1,450 ° C. over 10 hours, and cooled to room temperature to prepare a light emitting body.

The resulting light emitter was ground using a mortar and pestle, followed by excitation and emission spectra and intensity measurements using a fluorescence spectrophotometer.

As can be seen in Figures 1 and 2, the luminous intensity of the luminous material prepared in Experimental Example 1 was 1.76 (counts / 10 ⁵ ), the luminous intensity of the luminous material prepared in Experimental Example 2 was 1.63 (counts / 10 ⁵ ), the experiment In Example 2, based on the emission intensity of BaCO ₃ 1.9734g (0.0099mol) and SnO ₂ 1.5071g (0.0100mol) in the same manner as the starting material (Comparative Example 1), the light emitting body prepared in Experimental Example 1 was 8 %, The light emitting body prepared in Experimental Example 2 was confirmed that the 13% emission intensity is enhanced.

(Production Example 1)

Anti-counterfeit multifunctional convergence security element ink is solvent evaporative screen ink, which is 62% by weight of resin for screen (NazDars S-227), 17.6% by weight of cyclohexanone, 0.4% by weight of Disperse BYK, and time-varying A security ink was prepared by mixing 19% by weight of each pigment (KCSI Co., Ltd.) and 1% by weight of a luminous material having an average particle diameter of 5 μm prepared in Experimental Example 2.

The prepared ink was printed on paper by screen printing. The screen used was 150 mesh, the thickness of the screen was about 30 mu m, and the thickness of the ink coating film after drying was about 15 mu m.

The time-varying effect of the sample prepared by screen printing was evaluated using an angle conversion color difference meter, and the emission intensity of the invisible light emitter using a fluorescence spectrophotometer is shown in FIG. 3.

(Production Example 2)

Preparation Example 1 except that 62% by weight of the resin component, 17.6% by weight of the solvent component, 0.4% by weight of the additive, 15% by weight of the time-varying pigment and 5% by weight of the luminous material having an average particle diameter of 5 μm. Similarly, security ink was prepared and printed to measure the time varying effect and the light emission intensity of the light emitting body, and the measured light emission intensity is shown in FIG.

(Production Example 3)

Preparation Example 1 except that 62% by weight of the resin component, 17.6% by weight of the solvent component, 0.4% by weight of the additive, 10% by weight of the time-varying pigment, and 10% by weight of the luminous material having an average particle diameter prepared in Experiment 2 Similarly, security ink was prepared and printed to measure the time varying effect and the light emission intensity of the light emitting body, and the measured light emission intensity is shown in FIG.

(Production Example 4)

Preparation Example 1 except that 62% by weight of the resin component, 17.6% by weight of the solvent component, 0.4% by weight of the additive, 5% by weight of the time-varying pigment and 15% by weight of the luminous material having an average particle diameter prepared in Experiment 2 Similarly, security ink was prepared and printed to measure the time varying effect and the light emission intensity of the light emitting body, and the measured light emission intensity is shown in FIG.

As a result of the visual identification of the time varying effect, when the content is reduced to 10% by weight, the inhibition of the time varying effect was observed, and when it is reduced to 5% by weight, the effect is significantly inhibited.

Claims (9)

The tin compound is prepared by mixing and baking 80 to 120 moles and 0.1 to 10 moles of an alkali metal salt compound, which is a salt of at least one selected from Li, Na, K, Rb, Cs and Fr, with respect to 100 moles of barium compound. A convergence security ink containing an invisible light emitter, which is a barium-tin-alkali metal ternary oxide, which absorbs light to emit light in an infrared region, and a time-varying pigment. The method of claim 1,
The alkali metal is lithium or sodium security ink. The method of claim 1,
The invisible light emitter is a security ink for emitting light having a wavelength of 370 to 390 nm as excitation light, 935 to 940 nm wavelength. The method of claim 1,
And the ink contains 1 to 10% by weight of the invisible light emitter. 5. The method of claim 4,
And the ink contains 1 to 5% by weight of the invisible light emitter. 6. The method of claim 5,
Wherein said ink contains 10 to 20 weight percent of a time varying pigment. 5. The method of claim 4,
The ink for security is ink for solvent evaporation screen printing. 8. The method of claim 7,
Wherein said ink contains 50 to 70 weight percent resin and 15 to 25 weight percent solvent. A security paper provided with a coating film to which the ink of any one of Claims 1-8 was apply | coated and dried.

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