KR102586123B1 - Anti-counterfeit method - Google Patents

Abstract

The present invention relates to a method for preventing counterfeiting and falsification that allows a user to visually identify a color change, comprising a color variable unit combining two or more materials whose color changes by an external stimulus, and wherein the color changes by the external stimulus. It is characterized by including a step of visually identifying the color change of the variable part.

Description

How to prevent counterfeiting and alteration. {ANTI-COUNTERFEIT METHOD}

The present invention relates to a method for preventing counterfeiting and tampering. More specifically, the present invention relates to a method for preventing counterfeiting and tampering, and more specifically, to a method of preventing counterfeiting and tampering, which includes a complex of discoloring materials capable of changing color by various external conditions, such as magnetic field, electric field, heat, light, angle, pressure, humidity, and pH. It relates to a method for preventing counterfeiting and tampering that implements a color variable effect.

Existing anti-counterfeiting and tampering devices consist of a single layer of material to prevent counterfeiting and tampering, and are configured to cause color variation due to a change in one condition.

For example, in Republic of Korea Patent Publication No. 10-1476412, a color variable phenomenon is caused by changes in light reflection characteristics or light transmission characteristics by configuring a variable material-containing layer containing a variable material that changes reflected light or transmitted light. In Registered Patent Publication No. 10-1703914, a magnetically variable material-containing layer containing a magnetically variable material that changes reflected or transmitted light when the magnetic field changes creates a color variable phenomenon by an external magnetic field, thereby realizing the effect of preventing counterfeiting and tampering. there is.

This individual configuration has the advantage of maximizing the physical and optical properties of the anti-counterfeiting and tampering material itself, but has the disadvantage of being easy to analyze from the manufacturer in relation to counterfeiting and tampering, and being relatively easy to imitate with a simple combination. Accordingly, there is an emerging need for a method for preventing forgery and falsification and a device for implementing the same that can minimize the risk of forgery and falsification and produce new effects by combining the characteristics of each security element.

Republic of Korea Patent Publication No. 10-1476412 Republic of Korea Patent Publication No. 10-1703914

The present invention was conceived in consideration of the above-described prior art, and is designed to prevent counterfeiting and tampering by complexly containing discoloring materials that implement color change effects depending on magnetic field, electric field, heat, light, angle, pressure, humidity, and pH. The purpose is to provide a method to improve efficiency.

The method for preventing counterfeiting and falsification of the present invention to solve the above problems includes a color variable part that combines two or more materials whose colors change by an external stimulus, and the color change of the color variable part by the external stimulus. It is characterized by including a step of visual identification.

At this time, the color change can be identified with the naked eye, including forming a coded pattern in the color variable portion by the external stimulus and identifying the coded pattern with a detection device.

In addition, the external stimulus is light generated from the flash of a smartphone, and when the light approaches the color variable part within a range of 5 cm, a color change in the color variable part occurs, so that the color change can be visually identified. there is.

In addition, the external stimulus is light generated from the flash of a smartphone, and when the light approaches the color variable part within 5 cm, a color change in the color variable part occurs, and the color change is visible to the naked eye. It is impossible, and can be identified with the naked eye by detection through a detection device.

In addition, the material whose color changes due to the external stimulus may have its color changed due to any one of external stimuli such as magnetic field, electric field, angle, heat, light, pressure, humidity, and pH.

Additionally, the material whose color changes due to the external stimulus may include a material that absorbs light energy and emits light.

In addition, the material whose color changes due to the external stimulus may form the color variable portion by stacking one material and another material so that some areas overlap, and the material whose color changes due to the external stimulus may be composed of two or more types. The color variable portion may be formed in one layer by mixing the materials and applying the mixed material to the substrate to form the color variable portion.

Additionally, the material whose color changes due to the external stimulus can be mixed with a transparent resin to form a color variable portion.

In addition, the material whose color changes due to the external stimulus may be transparent before the external stimulus is applied and may change color to a specific color when the external stimulus is applied. In addition, the material may have a first color before the external stimulus is applied. When an external stimulus is applied, a color change to a second color may occur.

The method for preventing counterfeiting and tampering according to the present invention can improve the efficiency of preventing counterfeiting and tampering by complexly including discoloring materials that implement color change effects by magnetic field, electric field, heat, light, angle, pressure, humidity, and pH. there is.

1 is a conceptual diagram showing a device for implementing a method for preventing counterfeiting and alteration according to the present invention.
Figure 2 is a conceptual diagram of a counterfeiting and tampering prevention device (a) composed of one color variable layer and a counterfeiting and tampering prevention device (b) composed of a plurality of color variable layers.

Hereinafter, the present invention will be described in detail.

The method for preventing counterfeiting and falsification of the present invention includes a color variable portion combining two or more materials whose color varies by an external stimulus, and includes the step of visually identifying a change in color of the color variable portion due to the external stimulus. It is characterized by

The method for preventing counterfeiting and tampering is implemented through a device for preventing counterfeiting and tampering, as shown in Figure 1. It is formed in a structure such as a film or label in which color variable parts are laminated on a substrate so that the user can visually identify it. You can.

The step of identifying with the naked eye is performed not only when the color change of the color variable portion can be directly observed with the naked eye. Although the color change of the color variable portion is not observed with the naked eye, the color change is detected through a detection device and can be observed with the naked eye through this. This also includes cases that can be observed.

That is, when the color change of the color variable part cannot be observed with the naked eye, forming a coded pattern in the color variable part by the external stimulus, and identifying the coded pattern with a detection device. This makes it possible to visually identify color changes.

In addition, by using the counterfeit and tampering prevention device including the color variable unit using a smartphone, the user can identify the genuine product and perform a method of preventing counterfeiting and tampering. In this case, the light generated from the flash of the smartphone can be used, and when the light approaches the color variable part within 5 cm using the light as an external stimulus, the color in which the color change of the color variable part occurs is By applying a variable material, users can visually identify color changes using a smartphone.

In addition, if the color-variable material is a material that causes a color change that cannot be recognized with the naked eye, when the light generated from the flash of a smartphone approaches the color variable portion within 5 cm, the color of the color variable portion When a change occurs, it is detected through a detection device, allowing the user to visually identify the color change through the screen of the detection device.

The material whose color changes due to the external stimulus is one whose color changes due to any one of the following external stimuli: magnetic field, electric field, angle, heat, light, pressure, humidity, and pH. By appropriately combining these various materials, various forms can be created. It becomes possible to implement a method to prevent counterfeiting and alteration.

In one embodiment, a magnetic color variable pigment can be used as a material whose color changes by a magnetic field. Particles included in the magnetic color variable pigment may have magnetism so that they can rotate or move by receiving magnetic force from a magnetic field. For example, magnetic materials such as nickel (Ni), iron (Fe), and cobalt (Co) May be included in particles.

The particles may include a material that becomes magnetic, that is, magnetized, when a magnetic field is applied. In particular, in order to prevent magnetic particles from agglomerating when an external magnetic field is not applied, magnetization occurs when an external magnetic field is applied, but when an external magnetic field is not applied, remnant magnetization occurs. Superparamagnetic materials that do not occur can be used.

Additionally, in order to ensure that the particles are well dispersed in the solvent and do not aggregate, the surface of the particle may be coated with a charge of the same sign, and in order to prevent the particles from settling in the solvent, the surface of the particle may be coated with a material that has a different specific gravity from that of the particle in question. It is also possible to mix substances with different specific gravity from the corresponding particles in the solvent.

Additionally, particles can be configured to reflect light of a specific wavelength, that is, to have a specific color. More specifically, particles according to the present invention can have a specific color through adjustment of oxidation number or coating with inorganic pigments, pigments, etc. For example, inorganic pigments coated on the particles include chromophore-containing Zn, Pb, Ti, Cd, Fe, As, Co, Mg, Al, etc., and may be used in the form of oxides, emulsions, and lactates, according to the present invention. Dyes coated on particles according to may include fluorescent dyes, acid dyes, basic dyes, mordant dyes, sulphide dyes, vat dyes, disperse dyes, reactive dyes, etc. In addition, particles included in the magnetic color variable pigment may include fluorescent materials, phosphorescent materials, quantum dot materials, temperature indicating materials, optically variable pigment (OVP) materials, etc. there is.

These self-color variable pigments may be coated with silica, polymers, polymer monomers, etc. on the surface of the particles in order to have high dispersibility and stability in the solvent. The solvent contained in the magnetic color variable pigment may be composed of a material having a specific gravity similar to that of the particles so that the particles can be uniformly dispersed, and may be composed of a material suitable for stably dispersing the particles in the solvent. For example, it may include halogen carbon oil having a low dielectric constant, dimethyl silicone oil, etc.

Additionally, the solvent may be configured to reflect light of a specific wavelength, that is, to have a specific color. More specifically, the solvent according to the present invention may contain a material having an inorganic pigment or dye, or may contain a material having a structural color due to photonic crystals.

Additionally, by uniformly dispersing the magnetic particles in a fat-soluble solvent, it is possible to prevent the particles from clumping together or sticking to the inner wall of the capsule during the encapsulation process.

Additionally, the particles and solvent contained in the magnetic color variable pigment may be encapsulated or compartmentalized for use. That is, the particles may be dispersed in a solvent and encapsulated in a plurality of capsules made of a light-transmissive material. By encapsulating the particles and solvent, direct interference such as mixing between different capsules can be prevented, and thus the particles contained in the magnetically variable material can be controlled independently for each capsule, resulting in more diverse patterns. It is possible to control light transmission, and the light transmittance control characteristics can be improved.

For example, gelatin, acacia, melamine, urea, protein, polysaccharide, etc. may be used as materials constituting the capsule, and a material (i.e., binder) for fixing the capsule may be used. However, the composition of the capsule according to the present invention is not necessarily limited to the examples listed above, and any material that is light-transmissive, physically strong, non-hard, elastic, non-porous, and resistant to external heat and pressure can be used in the present invention. It can be used as a material for capsules.

Additionally, the particles may be partitioned in a dispersed state in a solvent. In other words, it is possible to prevent direct interference, such as mixing, between different cells divided by a partition, and thus particles contained in the magnetically variable material-containing portion can be independently controlled for each capsule.

Additionally, in one embodiment, heat-sensitive ink can be used as a material whose color changes with heat. The heat-sensitive ink may be a Zion ink containing a Zion pigment or a Zion dye. A variety of heat-sensitive inks have been developed and are commercially available. There are heat-sensitive inks that change color in various temperature ranges, so they can be appropriately mixed and used depending on the application. That is, the heat-sensitive ink is classified into various types depending on the operating temperature range. There are various types of ink that discolor in the temperature range of -5 to 65 ℃, and the colors are yellow, orange, rose red, red, magenta, green, It is available in various colors such as sky blue, turquoise blue, fast blue, dark blue, purple, and black, so various discoloration effects can be achieved.

Additionally, in one embodiment, photonic crystal technology of the magnetic color variable pigment can be used as a material whose color changes depending on the angle. That is, using the characteristic of the magnetic color variable pigment, which exhibits colors reflected by the arrangement and spacing of the nanoparticles dispersed in the dispersion medium, various colors can be realized by adjusting the arrangement and spacing of the nanoparticles by a magnetic field.

The magnetic color variable pigment can achieve various color variable effects by mixing it with other colored particles in microcapsules. In other words, the distance between regularly arranged particles changes depending on the strength of the applied magnetic field, so the length of the reflected wavelength changes. Accordingly, it can be a “color variable pigment” that can realize various colors, and can be used as a “color variable pigment” by applying a magnetic field. It may be a “switching pigment” in which the first colored particles located at the top of the microcapsule and the second colored particles located at the bottom reverse their positions so that the color changes when viewed from the top. It may be a “transparency control pigment” that changes transparency when viewed from above by changing the array angle.

Additionally, the material whose color changes due to the external stimulus may include a material that absorbs light energy and emits light. By including these materials, a fluorescent effect can be achieved, allowing users to visually identify them even in dark environments.

In addition, the material whose color changes due to the external stimulus may form the color variable portion by stacking one material and another material so that some areas overlap, and the material whose color changes due to the external stimulus may be composed of two or more types. The color variable portion may be formed in one layer by mixing the materials and applying the mixed material to the substrate to form the color variable portion. Therefore, the color variable part may be composed of a single layer by mixing materials with different colors as shown in FIG. 2(a), and as shown in FIG. 2(b), the color variable part may be composed of a layer with different colors. The material may be composed of two or more layers stacked to form each layer.

Additionally, the material whose color changes due to the external stimulus can be mixed with a transparent resin to form a color variable portion.

In addition, the material whose color changes due to the external stimulus may be transparent before the external stimulus is applied and may change color to a specific color when the external stimulus is applied. In addition, the material may have a first color before the external stimulus is applied. When an external stimulus is applied, a color change to a second color may occur.

In this case, the device implementing the method for preventing counterfeiting and tampering is transparent and displays the background color of the substrate before an external stimulus is applied, and can visually display a specific color when an external stimulus is applied, or can visually display a specific color of one external stimulus. The first color may be visually displayed depending on the application, and the second color may be visually displayed when another external stimulus is applied.

If various color variable effects are realized by combining external stimuli in this way, forgery and falsification become very difficult, and the effect of preventing forgery and falsification is greatly improved.

As described above, the present invention has been described with reference to preferred embodiments, but it is not limited to the above embodiments and various modifications and changes may be made by those skilled in the art without departing from the spirit of the present invention, and such modifications and changes may be made. The examples should be considered as falling within the scope of this invention and the appended claims.

Claims (11)

It includes a color variable part that is a combination of two or more materials whose colors change due to external stimuli,
Comprising a step of visually identifying the color change of the color variable portion due to the external stimulus,
The color variable portion includes a microcapsule containing first colored particles located at the top and second colored particles located at the bottom, and when a magnetic field is applied, the positions of the first colored particles and the second colored particles are changed so that they are visible from the top. A method for preventing counterfeiting and tampering, characterized by changing the color of dirt.
In claim 1,
forming a coded pattern in the color variable portion by the external stimulus;
Identifying the coded pattern with a detection device;
A method for preventing counterfeiting and tampering, comprising:
In claim 1,
The external stimulus is light generated from the flash of a smartphone,
A method for preventing counterfeiting and falsification, characterized in that a color change in the color variable portion occurs when the light approaches the color variable portion within 5 cm.
In claim 1,
The external stimulus is light generated from the flash of a smartphone,
A color change in the color variable portion occurs when the light approaches the color variable portion within 5 cm,
The color change is not discernible to the naked eye,
A method for preventing counterfeiting and falsification, characterized by visual identification by detection through a detection device.
The method of any one of claims 1 to 4,
A method for preventing counterfeiting and tampering, wherein the material whose color changes due to the external stimulus changes color due to any one of the external stimuli selected from the group consisting of a magnetic field, electric field, angle, heat, light, pressure, humidity, and pH.
The method of any one of claims 1 to 4,
A method for preventing counterfeiting and falsification, wherein the material whose color changes due to external stimulation includes a material that absorbs light energy and emits light.
The method of any one of claims 1 to 4,
A method for preventing counterfeiting and falsification, wherein the material whose color changes due to the external stimulus is stacked with one material and another material so that some areas overlap to form the color variable portion.
The method of any one of claims 1 to 4,
Mixing two or more materials whose color changes due to the external stimulus;
forming a color variable portion by applying the mixed material to a substrate;
A method for preventing counterfeiting and tampering, comprising:
The method of any one of claims 1 to 4,
A method for preventing counterfeiting and falsification, characterized in that the material whose color changes due to the external stimulus is mixed with a transparent resin to form a color variable portion.
The method of any one of claims 1 to 4,
A method for preventing counterfeiting and falsification, characterized in that the material whose color changes due to the external stimulus is transparent before the external stimulus is applied and changes color to a specific color when the external stimulus is applied.
The method of any one of claims 1 to 4,
A method for preventing counterfeiting and falsification, characterized in that the material whose color changes due to the external stimulus has a first color before the external stimulus is applied and changes color to a second color when the external stimulus is applied.