KR102632900B1 - Forgery prevention means applied with three-step authentication method and forgery authentication method using the same - Google Patents

Abstract

The present invention relates to a forgery prevention means using a three-stage authentication method and a forgery authentication method using the same. More specifically, it relates to a forgery prevention means capable of bending authentication and polarization authentication as well as general QR authentication, and a forgery authentication method using the same. It's about.

Description

Forgery prevention means applied with three-step authentication method and forgery authentication method using the same}

The present invention relates to a forgery prevention means using a three-stage authentication method and a forgery authentication method using the same. More specifically, it relates to a forgery prevention means capable of bending authentication and polarization authentication as well as general QR authentication, and a forgery authentication method using the same. It's about.

In modern times, various new products are being developed according to technological advancements, and transactions of the developed products are actively taking place online. However, unfortunately, cloning technology has also advanced greatly, making it difficult to distinguish between genuine and replica products. In the case of high-priced products, various anti-counterfeiting technologies are applied, but in the case of somewhat low-priced products that are inevitably distributed in large quantities, it is difficult to apply them, and in the case of items such as food, medical products, and cosmetics, they are directly related to human health and even life. It appears that social attention is needed.

Among anti-counterfeiting technologies, anti-counterfeiting systems using photonic crystal-based patterns, which are widely used, have the disadvantage that they are always visible in the presence of light and are not suitable for hiding information, so their utility as an anti-counterfeiting system is limited.

Accordingly, much development is being conducted on a new type of anti-counterfeiting device that has quick response to external stimuli (tensile, compression, bending, torsion, etc.) using a reflective method that allows structural color to appear.

In the case of the anti-counterfeiting device that is responsive to the external stimulus, a layer of a flexible material with a predetermined rigidity is built into the device and a load is applied to the device in a bending authentication method such as tension, compression, or twisting. An image can be displayed based on structural color.

In addition to bending authentication as described above, recently, with the popularization of smartphones capable of polarization authentication, authentication methods that irradiate polarized light to liquid crystals to reveal inherent hidden marks are increasingly being used and advanced. .

One of the polarized liquid crystals capable of forgery authentication is cholesteric liquid crystal, which forms a spiral structure in which molecules in each layer are twisted at a certain angle. This has been applied to LCD panels mainly used in mobile phones, and has recently been widely used for counterfeit labels. It is being used.

However, as the various forgery and forgery authentication methods described above develop, the forgery and forgery technology is also gradually evolving. Therefore, the application of a single anti-counterfeiting device may not be able to prepare for the advanced forgery and forgery technology, so a counterfeit prevention method that applies various authentication methods is needed. .

The purpose of the present invention is to provide a forgery prevention means that enables not only general QR authentication but also bending authentication on the upper side and polarization authentication on the lower side, and a forgery authentication method using the same.

According to one embodiment of the present invention, a first layer is formed of a flexible material and includes a high wrinkle area and a low wrinkle area; a second layer formed in a pattern on the upper part of the high wrinkle area, made of a material having a Young's modulus greater than that of the first layer, and adhered to the first layer; a third layer bonded to cover the low radius area and the second layer and formed of a material having a Young's modulus greater than that of the first layer and less than that of the second layer; a plurality of fourth layers adhered to the lower part of the first layer; and a fifth layer attached to the lower part of the fourth layer and printed with cholesteric liquid crystal ink to contain hidden marks. may include.

In an exemplary embodiment, the plurality of fourth layers may include a pair of design printing layers of different colors.

In an exemplary embodiment, one design print layer of the fourth layer is made of a print layer with a specific pattern printed with general ink, and the other design print layer is printed with liquid crystal ink containing a complementary dye. It may be made of a printed layer on which a specific pattern is formed.

In an exemplary embodiment, a sixth layer is formed by adhesion to the lower part of the fifth layer, is made of the same material as the first layer, but is polarized and oriented to have an orientation angle different from that of the first to fifth layers. It may further include.

In an exemplary embodiment, the third layer may be polarized to have a different orientation angle from the first layer, second layer, fourth layer, and sixth layer.

In an exemplary embodiment, the fifth layer is embedded in the first layer, and the second layer may be polarized to have different orientation angles from the first layer, the third layer, and the fifth layer. .

In an exemplary embodiment, the fifth layer is embedded in the third layer, and the third layer may be polarized to have different orientation angles from the first layer, the second layer, and the fifth layer. .

In an exemplary embodiment, either the first layer or the third layer is polarized and oriented to have a different orientation angle from the second layer, and the fourth layer and the fifth layer are the first layer. It can be placed on the side rather than the bottom.

In an exemplary embodiment, a forgery prevention device including the above-described forgery prevention means is disclosed.

In an exemplary embodiment, in a forgery authentication method using a forgery prevention means, the step of confirming forgery with a structural color appearing by applying a load from the first to third layers having different Young's moduli in a bending authentication method. ; Confirming forgery and alteration from a fourth layer having a plurality of printed layers made of different colors; and confirming forgery and tampering using a polarization authentication method through a fifth layer consisting of the cholesteric liquid crystal layer. You can check for forgery or alteration through .

The present invention has the effect of increasing the anti-counterfeiting effect through various authentication methods, including not only QR authentication but also polarization authentication and bending authentication methods.

Figure 1 shows a cross-sectional view of a means for preventing counterfeiting and falsification according to an embodiment of the present invention.
2 to 6 show cross-sectional views of a counterfeit and tampering prevention means according to another embodiment of the present invention.

Since the present invention can be modified in various ways and can have various embodiments, specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all transformations, equivalents, and substitutes included in the spirit and technical scope of the present invention.

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

Figure 1 shows a cross-sectional view of a means for preventing counterfeiting and falsification according to an embodiment of the present invention.

According to one embodiment of the present invention, a first layer 111 is formed of a flexible material and includes a high wrinkle area and a low wrinkle area, a pattern is formed on the upper part of the high wrinkle area, and the first layer 111 ) is formed of a material having a Young's modulus greater than the second layer 112, which is adhered to the first layer 111, and is adhered to cover the low wrinkle area and the second layer 112, and the first layer (111) a third layer 113 formed of a material having a Young's modulus greater than that of the second layer 112 and less than that of the second layer 112, a plurality of fourth layers 114 adhered to the lower part of the first layer 111, and the first layer 112. It may include a fifth layer 115 that is adhered to the lower part of the fourth layer 114 and is printed with cholesteric liquid crystal ink and has a hidden mark.

The first layer 111 may be formed by curing epoxy (EPU) on the upper surface of a substrate (RB) made of polyethylene terephthalate (PET), but is not limited to this, and is not limited to polypropylene or flexible material. It can be made of excellent natural materials, etc., and is preferably made of a soft material that contains a plasticizer and has further improved flexibility.

In addition, it is preferable to further include a process of plasma treating the cured first layer 111 to strengthen the interfacial bond with the second layer 112 formed on the top, and the first layer 111 formed in this way is Young's modulus is preferably in the range of 10 to 20 Mpa.

In addition, the first layer 111 preferably has a thickness of 200 to 300 ㎛, which means that its shape must be easily deformed by external force. If the first layer 111 has a thickness exceeding the above range, the manufacturing cost increases, The thickness becomes thick, making it unsuitable for use as a film, and furthermore, it has the disadvantage of not being able to bend easily when exposed to external stimulation, such as bending. If the thickness is less than the above range, durability is weakened and it may be destroyed by external stimulation. The stability of the substrate itself is low, so when wrinkles are formed by bending, wrinkles of random size may be formed rather than wrinkles of uniform size, which has the disadvantage of reducing the visibility of the pattern when it is expressed on the film surface. Because there is.

Next, the second layer 112 can be patterned by printing on the high wrinkle area of the upper surface of the first layer 111, and the second layer 112 is formed of a hard material to form a first layer ( When the shape of 111) is deformed, micro-sized wrinkles are formed on the surface due to differences in physical properties, forming a grating structure by the arrangement of the wrinkles.

At this time, the second layer 112 preferably uses a material having a Young's modulus value greater than that of the first layer 111, for example, a Young's modulus in the range of 60 Gpa to 80 Gpa. However, here, the numerical range for the Young's modulus values of the first layer 111 and the second layer 112 merely suggests a preferable numerical range, so it is not limited thereto and may have various Young's modulus values including the corresponding numerical range. It may be possible. For example, depending on the preferred Young's modulus value of the first layer 111 in the range of 10 to 20 Mpa and the preferred Young's modulus value of the second layer 112 in the range of 60 to 80 Gpa, [1/8000 ≤ first layer (111) Young's modulus / second layer (112) Young's modulus] ≤1/3000] can be satisfied.

Next, the third layer 113 is formed of a material with a lower Young's modulus than the second layer 112, so that when the shape of the first layer 111 is deformed by an external force, a nano layer is formed on the surface due to the difference in physical properties. Wrinkles of any size are formed, forming a grating structure by the arrangement of the wrinkles.

In addition, looking at the wrinkle formation principle that forms the grating structure in the composite of the present invention, when an external force is applied to the flexible first layer 111 and a bending load is applied in the direction of the third layer 113 and the second layer 112 , the third layer due to mismatch in mechanical properties of the thin and rigid third layer 113 and the second layer 112 and the first layer 111, which is thicker and softer than the third layer 113 and the second layer 112. A wrinkle arrangement pattern with a periodic width is formed in the layer 113 and the second layer 112 due to buckling-type instability.

It is formed by adhering to the lower part of the first layer 111 and may include a fourth layer 114 in which a pair of design printing layers are made of different colors.

The fourth layer 114 is composed of a pair of design printing layers, and each printing layer may be composed of different colors such as white and black, and it is preferable that different colors are arranged depending on the purpose of authentication. .

In one embodiment, one design print layer of the fourth layer 114 is made of a print layer with a specific pattern printed with general ink, and the other design print layer is made of liquid crystal ink containing a complementary dye. It may be printed or made of a liquid crystal film containing a complementary dye, where the color of the complementary dye may be a color that has a complementary contrast relationship with the color of the dye contained in the general ink.

Here, the complementary color contrast relationship is a relationship between colors that are symmetrical to each other in Munsell's color wheel or practical color system color wheel, and when viewed side by side, such as orange and sea blue, yellow and indigo, each color changes due to the influence of the other. It can refer to a combination of colors that make the color appear more intense and vivid.

In addition, due to a pair of design printing layers made of different colors, the pattern can be seen with the naked eye even under non-polarized light, and can be printed with regular ink or liquid crystal ink containing a complementary dye.

In addition, the pattern constituting the design print layer forming the fourth layer 114 may be configured in various forms, and is preferably provided as a pattern that can be digitally authenticated by a display device, such as a QR code or BAR code.

Next, a fifth layer 115 may be attached to the lower part of the fourth layer 114 and printed with cholesteric liquid crystal ink to include a hidden mark.

The cholesteric liquid crystal included in the fifth layer 115 is one of the polarized liquid crystals capable of forgery and tampering authentication, and the molecules in each layer are twisted at a certain angle to form a spiral structure.

When polarized light is irradiated to the surface of the cholesteric liquid crystal, various colors and patterns are externally displayed depending on the arrangement state of the molecules, and this latent image development technology can be applied to the fifth layer 115 for anti-counterfeiting means.

In this way, the fifth layer 115 can be printed with cholesteric liquid crystal ink, and forgery and alteration can be confirmed by identifying hidden marks by irradiating polarized light on the surface.

Meanwhile, the cholesteric liquid crystal powder may be a cholesteric liquid crystal microcapsule, and the cholesteric liquid crystal microcapsule may have an average diameter of about 10 μm that can be printed.

The display layer 130 provided with ink containing cholesteric liquid crystals may account for 1-30% of the weight of cholesteric liquid crystal powder based on the total weight of ink containing cholesteric liquid crystals, and the remaining At least a portion of the weight may be occupied by at least one of the general inks.

In addition, among the display layers, the display layer containing cholesteric liquid crystal may be a mixture of cholesteric liquid crystal powder and a thermosetting binder, and the weight of the cholesteric liquid crystal powder when mixed with the binder is the fourth layer ( 114) and can be less than 30%, which is the maximum possible for adhesion.

At this time, considering adhesiveness and stability, it is preferable that the heat-curing binder is an acrylate-based binder.

In addition, as the weight of the cholesteric liquid crystal powder increases, visibility during authentication may increase.

In addition, among the total weight of the ink containing the cholesteric liquid crystal, at least a portion of the remaining weight excluding the weight of the cholesteric liquid crystal may be occupied by nematic liquid crystal or liquid crystal polymer rather than general ink.

Through this, part of the total weight of the ink is composed of cholesteric liquid crystals and the remaining part is composed of nematic liquid crystals or liquid crystal polymers, and an electric current is passed through them to adjust the orientation angle of the nematic liquid crystals or liquid crystal polymers, thereby polarizing the light during authentication. When illuminated, the front and back colors can be illuminated differently.

As described above, the first layer 111 to the fifth layer 115 are stacked, and a load is applied from the first layer 111 to the third layer 113 having different Young's moduli through a bending authentication method. At the same time, forgery can be confirmed by the structural color that appears, and at the same time, forgery can be confirmed from the fourth layer 114, which has a plurality of printed layers of different colors, and the fifth layer printed with the cholesteric liquid crystal ink ( 115) has the advantage of being able to check forgery and forgery using polarization authentication.

According to another embodiment of the present invention, it is formed by bonding to the lower part of the fifth layer 115 and is made of the same material as the first layer 111, but the first to fifth layers 115 ) and may further include a sixth layer 116 polarized to have a different orientation angle.

As shown in FIG. 2, the sixth layer 116 may be attached to the lower part of the fifth layer 115, and may have a different orientation angle from the first to fifth layers 115. Since the polarization is oriented so that the sixth layer 116 can be used as a polarizing lens.

In another embodiment of the present invention, the third layer 113 is oriented differently from the first layer 111, the second layer 112, the fourth layer 114, and the sixth layer 116. Polarization may be oriented to have an angle.

According to the above embodiment, the fourth layer is not glued to the bottom of the first layer 111, and the fifth layer 115 is formed by bonding to the bottom of the first layer 111, and the first layer is attached to the bottom of the fifth layer 115. An anti-counterfeiting device can be formed by attaching a sixth layer 116 made of the same material as (111), where the third layer 113 is configured to be polarized and oriented, and the third layer 113 is used as a polarizing lens. It can be used as

In another embodiment of the present invention, the fifth layer 115 is embedded in the first layer 111, and the second layer 112 includes the first layer 111 and the third layer 113. ) and the fifth layer 115 may be polarized to have different orientation angles.

Accordingly, forgery can be confirmed through polarization authentication on the upper side, and at the same time, forgery and alteration can be confirmed on the lower side through bending authentication.

The fifth layer 115 may be arranged to be embedded in the first layer 111, and preferably has a width corresponding to the second layer 112 patterned on the upper part of the high wrinkle area of the first layer 111. The fifth layer 115 with is disposed in the inner center of the first layer 111, and the second layer 112 is configured to be polarized, so that the second layer 112 can be used as a polarizing lens.

In this embodiment as well, polarization authentication is possible on the upper surface and at the same time, forgery and alteration can be confirmed through bending authentication on the upper and lower surfaces.

In another embodiment of the present invention, the fifth layer 115 is embedded in the third layer 113, and the third layer 113 includes the first layer 111 and the second layer 112. ) and the fifth layer 115 may be polarized to have different orientation angles.

The fifth layer 115 may be placed inside the third layer 113, and is placed in a different position in the width direction from the second layer 112 to avoid interference with the second layer 112. , the third layer 113 is polarized and oriented so that polarization authentication with the fifth layer 115 can be performed, and at the same time, upper bending authentication can also be performed.

In an exemplary embodiment, either the first layer 111 or the third layer 113 is polarized and oriented to have a different orientation angle from the second layer 112, and the fourth layer ( 114) and the fifth layer 115 may be disposed on the side rather than the bottom of the first layer 111.

The first layer 111 to the third layer 113 can be arranged in a vertical direction to perform bending authentication, where either the first layer 111 or the third layer 113 has a polarization orientation. It can be used as a polarizing lens.

In addition, the fourth layer 114 is disposed at the center of the side of the first layer 111 to the third layer 113, the fifth layer 115 is formed by bonding on the upper part, and the base layer 117 is formed on the lower part. ) can be formed by adhesion.

Here, the height from the first layer 111 to the third layer 113 and the height from the fourth layer 114 to the base layer 117 are the same, and the structure is formed to be bendable through an intermediate bending portion. You can.

Accordingly, bending authentication is possible in the height direction of the first layer 111 or the third layer 113, and polarization authentication can be performed by folding both sides.

In addition, in the forgery authentication method using a forgery prevention means, forgery can be confirmed by simultaneously performing various authentication steps such as bending authentication and polarization authentication. For example, a step can be taken to check whether forgery or tampering is performed using the structural color that appears by applying a load using a bending authentication method from the first layer 111 to the third layer 113 having different Young's moduli, and using different colors. Various authentication methods through the step of confirming forgery and alteration from the fourth layer 114 having a plurality of printed layers and the step of confirming forgery and alteration through the polarization authentication method through the fifth layer 115 composed of the cholesteric liquid crystal layer. You can increase the effectiveness of preventing forgery by checking whether it has been forged or altered.

Even if the effect is not described in the present specification, each of the above-described components may additionally have other effects in the present invention, and new effects that cannot be seen in the prior art are derived according to the organic combination relationship between each of the above-described components. can do.

In addition, the embodiments shown in the drawings may be modified and implemented in other forms, and if implemented including the configuration claimed in the claims of the present invention or implemented within the scope of equivalents, they should be considered to fall within the scope of the rights of the present invention. something to do.

100: Forgery prevention means
111: first layer
112: 2nd layer
113: 3rd layer
114: 4th layer
115: 5th layer
116: 6th layer
117: base layer

Claims (9)

A first layer formed of a flexible material and including a high wrinkle area and a low wrinkle area;
a second layer formed in a pattern on the upper part of the high wrinkle area, made of a material having a Young's modulus greater than that of the first layer, and adhered to the first layer;
a third layer bonded to cover the low radius area and the second layer and formed of a material having a Young's modulus greater than that of the first layer and less than that of the second layer;
a plurality of fourth layers adhered to the lower part of the first layer; and
A fifth layer is adhered to the lower part of the fourth layer and printed with cholesteric liquid crystal ink to contain hidden marks,
Either the first layer or the third layer is polarization oriented,
The fourth and fifth layers are disposed on the side rather than the bottom of the first layer,
The first layer, the second layer, the third layer, the fourth layer, and the fifth layer have a structure that can be bent through an intermediate bend, and polarization authentication is performed by folding both sides. According to paragraph 1,
The plurality of fourth layers,
A means for preventing counterfeiting and falsification, characterized in that a pair of design printing layers are made of different colors. According to paragraph 2,
Among the fourth layers, one design print layer is made of a print layer with a specific pattern printed with general ink, and the other design print layer is a print layer with a specific pattern printed with liquid crystal ink containing a complementary dye. A means for preventing forgery and falsification, characterized in that it consists of. According to paragraph 1,
A sixth layer is formed by adhesion to the lower part of the fifth layer and is made of the same material as the first layer, but is polarized and oriented to have a different orientation angle from the first to fifth layers. A means of preventing forgery and falsification. According to clause 4,
The third layer is polarization-oriented to have a different orientation angle from the first layer, second layer, fourth layer, and sixth layer. According to paragraph 1,
The fifth layer is embedded in the first layer,
The second layer is polarized and oriented to have different orientation angles from the first layer, the third layer, and the fifth layer. According to paragraph 1,
The fifth layer is embedded in the third layer,
The third layer is polarized and oriented to have different orientation angles from the first layer, the second layer and the fifth layer. delete In the forgery authentication method using the forgery prevention means according to any one of paragraphs 1 to 7,
Checking for forgery or alteration by applying a load to the first to third layers having different Young's moduli using a bending authentication method;
Confirming forgery and alteration from a fourth layer having a plurality of printed layers made of different colors; and
Confirming forgery and tampering using polarization authentication through a fifth layer consisting of a cholesteric liquid crystal layer; A forgery authentication method that checks whether forgery or alteration has occurred.