JP5966253B2 - Anti-counterfeit media - Google Patents

Description

  The present invention relates to an anti-counterfeit medium that makes it difficult to counterfeit the article by providing it on the article and that can be judged visually or mechanically. The present invention relates to an anti-counterfeit medium having a reuse prevention function.

Conventionally, the damage of bad counterfeit goods that infringes on intellectual property has become a major social problem. In order to prevent counterfeiting, there is a means for providing an anti-counterfeit medium such as a label for determining whether the product is a genuine product so that it can be distinguished from a real product. For this anti-counterfeit medium, many anti-counterfeiting means such as functional ink for anti-counterfeiting, special printing, hologram, magnetic recording, IC tag and the like are employed.
However, even if these anti-counterfeit measures are affixed to articles, fraudulent acts are often performed when the anti-counterfeit label is peeled off from the genuine product and attached to the counterfeit product.

For this reason, a method aimed at preventing reattachment of a forgery prevention label has been considered.
For example,
(1) A method in which a forgery-preventing label is torn and the forgery-preventing label is torn if the notch is provided with a notch and is forcibly removed.
(2) A method of making the base material of the forgery prevention label a brittle material,
Or
(3) Pattern brittle type in which characters such as “VOID” appear on the surface substrate when the label is peeled off, and ink adheres to the article
Etc.
However, in these methods, it is possible to remove the substrate without damaging the substrate by impregnating an organic solvent such as a label remover and removing it gently.

Therefore, there is a method for preventing re-sticking by containing an organic solvent-dissolved dye and causing the dye to ooze out from the printing portion when the dye is peeled off by label peeling or the like (see, for example, Patent Document 1).
However, even with this method, it is possible to remove the anti-counterfeit label by heating it with a dryer or the like.
In addition, when the label is warmed with a dryer or the like by containing foam particles in the pressure-sensitive adhesive layer of the label, there is a method for preventing re-sticking by foaming the foam particles in the pressure-sensitive adhesive layer (for example, patents) Reference 2).
Furthermore, there is a method for preventing re-sticking by making the adhesive of the label hardly soluble (see, for example, Patent Document 3).
However, even if the measures described in Documents 1 to 3 are applied, the anti-counterfeit label can be reused without being damaged by scraping the entire surface of the article to which the anti-counterfeit label is attached.
If this anti-counterfeit label is reused, the item itself will be damaged, but if the item is a consumable part of the device, it is irrelevant if it is done after the consumable item has been used. Because it is a serious problem.

JP-A-10-204363 JP 2000-293108 A JP 2005-266147 A

  The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide one method for preventing the reuse of a forgery prevention medium.

The invention according to claim 1 of the present invention includes a forgery prevention function layer on a substrate, reversibly first and second in-key layer for color change is provided by a temperature change, the first and second Anti-counterfeiting, characterized in that the ink layer has the same composition and the color of the first ink layer is changed by changing the temperature to change the color of the second ink layer. It is a medium.

Next, the invention according to claim 2 of the present invention is provided with a forgery prevention functional layer and a first and second ink layers that are reversibly developed or decolored by a temperature change on a substrate. The two ink layers have the same composition, and it is provided in a state where the first ink layer is colored by temperature change, and the second ink layer is provided in a decolored state, It is an anti-counterfeit medium.

  The invention according to claim 3 of the present invention is the anti-counterfeit medium according to claim 2, wherein the first and second ink layers have absorption in the infrared region only in a colored state. .

  The invention according to claim 4 of the present invention is characterized in that the first and second ink layers do not change from a decolored or colored state in an environment between −10 ° C. and 60 ° C. Item 4. An anti-counterfeit medium according to Item 2 or 3.

Furthermore, the invention according to claim 5 of the present invention provides, on the base material, the first and second ink layers that are reversibly developed or decolored by temperature change, separately from the forgery prevention functional layer , Furthermore , a third ink layer having a function of transmitting light in the infrared region and not transmitting light in the visible region is provided as a concealing layer thereon , and the first and second ink layers have the same composition, An anti-counterfeit medium characterized in that the first ink layer is provided in a colored state by changing the temperature, and the second ink layer is provided in a decolored state.

  The invention according to claim 6 of the present invention is the forgery prevention medium according to claim 5, wherein the first and second ink layers have absorption in the infrared region only in a colored state. .

  The invention according to claim 7 of the present invention is characterized in that the first and second ink layers do not change from a decolored or colored state in an environment between −10 ° C. and 60 ° C. Item 7. The forgery prevention medium according to Item 5 or 6.

  According to the first to seventh aspects of the invention, the reuse of the forgery prevention medium can be prevented. That is, when the product on which the anti-counterfeit medium is affixed is used, the anti-counterfeit medium is used by changing the color of either the first or second ink layer by heating or cooling, for example. It can be displayed. In addition, even if operations such as heating, cooling, and chemical treatment are performed to restore this color change, the first and second ink layers change color at the same time, leaving clear traces of processing. Can be prevented.

  In the invention of claim 2, since the first ink layer is provided in a colored state and the second ink layer is provided in a decolored state, it can be clearly determined as compared with the color change. In general, there are ink that develops color by heat treatment, ink that disappears by heat treatment, ink that disappears by heating at an appropriate temperature, ink that develops color by cooling, etc. It can be used.

  In the invention of claim 3, the forgery prevention effect can be enhanced by having infrared absorption in the state where the first and second ink layers are colored.

  According to the invention of claim 4, since no color change occurs in a general use environment, it can be stably used as an anti-counterfeit medium attached to various products.

  In the invention of claim 5, by providing a concealing layer on the first and second ink layers, it is possible to prevent the general consumer from recognizing that a recycle prevention function is included. The effect which prevents can be heightened. In this case, it is necessary to detect the reuse prevention function not by visual inspection but by a machine.

  According to the sixth aspect of the present invention, it is easy to mechanically detect the reuse prevention function from above the concealing layer by having infrared absorption in a state where the first and second ink layers are colored.

  According to the seventh aspect of the invention, since the color does not change in a general use environment, it can be stably used as an anti-counterfeit medium attached to various products.

It is sectional drawing which shows one Example of the forgery prevention medium concerning this invention. It is a top view which shows one Example of the forgery prevention medium concerning Claim 2 of this invention, Comprising: The unauthorized use is shown and the state which does not express the reuse prevention function is shown. It is a top view which shows one Example of the forgery prevention medium concerning Claim 2 of this invention, Comprising: Since it tried to use illegally by heating, it shows the state which the reuse prevention function expressed. It is a top view which shows one Example of the forgery prevention medium concerning Claim 2 of this invention, Comprising: The state which tried to tamper illegally what expressed the reuse prevention function is shown. It is sectional drawing which shows one Example of another type of forgery prevention medium concerning this invention. It is sectional drawing which shows one Example made into the actual last form using the forgery prevention medium concerning this invention. It is a top view which shows one Example which partially overlapped and printed the 1st ink and 2nd ink of the forgery prevention medium concerning this invention.

Hereinafter, embodiments of the present invention will be described in detail.
A cross-sectional view of an anti-counterfeit medium according to an embodiment of the present invention is as shown in FIG. 1, and an anti-counterfeit layer 4, a first ink layer 2, and a second ink layer 3 are provided on a substrate 1. It has been. The order of the layer configuration is not limited to this, and the first ink layer and the second ink layer may overlap.

  The substrate 1 can be assumed to be high-quality paper, coated paper, PET sheet, or the like, but any material can be used as long as printing is possible. However, since the anti-counterfeit medium of the present invention may exhibit a reuse prevention function by heating, a base material that is not deformed by heat that causes discoloration of the ink layer is desirable.

  Various anti-counterfeit media can be used as the anti-counterfeit function layer 4. For example, ink that shows a special appearance such as pearl ink, fluorescent ink that emits light with UV light, or OVI (OPTICAL VARIABLE DEVICE) represented by hologram. As the anti-counterfeiting functional layer for machine detection, ink that absorbs infrared rays having a specific wavelength can be used. It is also possible to use anti-counterfeiting functions by printing methods such as fine pattern printing, micro characters, intaglio printing, and the like. Further, the anti-counterfeiting functional layer is not limited to one type, and a plurality of layers may be combined or may have a multi-layer structure, and it is not necessary to cover the entire surface of the base material, and may be provided partially or in the order of the layer structure May be different.

Various materials have already been developed and known as the first and second ink layers whose color changes reversibly with temperature.
The most widely known type is a mixture of a leuco dye and a colorant. When the temperature exceeds a certain temperature, the dye and the colorant combine to form a color. There are various methods for erasing, such as disappearing by simply lowering the temperature, or disappearing by heating at an appropriate temperature for a certain time, but in any material, as the first and second ink layers of the present invention Can be used. Recently, there is also a commercially available ballpoint pen or the like that uses a friction ink that can be decolored by heating, and this type of ink also applies a leuco dye and can be used in the present invention. .
Further, many of such reversibly color-changing inks do not absorb in the infrared region. However, for example, as disclosed in Japanese Patent No. 2700223, a material having absorption in the infrared region has also been developed. It can utilize for invention as shown to Claim 3 and Claim 6.

FIG. 2 shows an embodiment of the anti-counterfeit medium of the present invention in the simplest form made of the material as described above.
The anti-counterfeit function layer 4 provided on the substrate can be visually confirmed, and the colored first ink layer 20 can also be visually confirmed. However, since the second ink layer 30 is originally provided in a decolored state, it is difficult to confirm whether it can be visually confirmed.
When a product provided with such an anti-counterfeit medium is used, the anti-counterfeit medium needs to exhibit a reuse prevention function in order to prevent reuse. In the present invention, the anti-counterfeit medium is heated or cooled in order to exhibit a reuse prevention function due to a temperature change. Hereinafter, a case where ink that develops color by heating is used will be described as an example.

  FIG. 3 shows a state in which the reuse prevention function is manifested by heating. In addition to the originally colored first ink layer 21, the second ink layer 31 is also colored, and in this figure, the characters “VOID” appear, and the product with this anti-counterfeit medium attached Indicates that the medium has been used, and prevents reuse of the forgery prevention medium.

  Since the ink used in the present invention reversibly changes color due to temperature change, it is possible to erase the color of the ink layer that is colored by heating as in the above example. However, since the first and second ink layers are provided in the present invention, if the color is erased by cooling or heating at an appropriate temperature, as shown in FIG. Since both of the two ink layers 32 are decolored, the appearance is different from that of the unused state of FIG. 2, and the reuse of the forgery prevention medium can be prevented.

In the examples of FIGS. 2 to 4 shown here, the first and second ink layers “GENUINE” and “VOID” are separately provided, so that a specific area is heated or cooled. Although there is a possibility of alteration and reuse, as shown in FIG. 5, such alteration can be prevented by providing the first and second ink layers in advance.
In the above description, the ink used for the first and second ink layers is an example that develops color when heated, but the present invention is not limited to this.
For example, the case where ink that is decolored by heating and colored by cooling is used as the first and second ink layers will be described with reference to FIG. In this case, the characters “GENUINE” are discolored and disappeared by heating, and the state shown in FIG. 4 indicates that the characters have been used. In addition, if you try to restore the original color of `` GENUINE '' that once disappeared due to cooling, the `` GENUINE '' and `` VOID '' characters will be colored at the same time, resulting in the state shown in FIG. It is shown that it is a modified version of the used one.

  Furthermore, the same applies when using ink that develops color by cooling as the first and second ink layers, or when using ink that decolors by cooling. In other states, it can be shown that the product has been used or may have been altered, so that unauthorized reuse can be prevented.

  Various methods of heating or cooling the anti-counterfeit medium of the present invention are assumed, but a simple device such as a heater or a thermal head can be generally used for heating. If a thermal head or the like is used, partial heating is possible, so that the usage can be expanded by changing the used display.

The inventions of claims 5 to 7 prevent the reuse prevention function from being visually confirmed in order to further enhance the forgery prevention effect.
In this case, since the first and second ink layers cannot be visually confirmed, it is essential to detect them with a machine.

FIG. 6 shows a simple embodiment.
A first ink layer 2 and a second ink layer 3 are provided on the substrate 1, and a concealing layer 5 is further provided thereon. An anti-counterfeit layer 4 is provided on the concealing layer. There is no limitation on the layer structure other than providing a concealing layer on the first and second ink layers.
Here, the concealing layer transmits the infrared region, and can be provided by printing mixed color black ink that does not contain carbon black or the like, or dark color ink. Although it becomes difficult to visually confirm the first and second ink layers from above the concealing layer thus provided, it can be confirmed by an apparatus capable of detecting infrared rays.
For example, by preparing a CCD camera having sensitivity also in the infrared region and providing this lens with a visible light cut filter, the camera can detect only the infrared region. By using such a camera and using a light source including an infrared region for illumination, the first and second ink layers can be observed from above the masking layer. Further, as shown in claim 6, if the first and second ink layers are colored and have absorption in the infrared region, the detection can be further easily performed.

The present invention is operated by a combination of a certain product and a consumable used for the product, and an example of an embodiment to be described below will be given for the case where it is desired to prevent the use of a counterfeit or reusable product.
First, an anti-counterfeit medium of the present invention is prepared. Here, a type of ink that is decolored by heating is used, and a barcode pattern is printed in a colored state as the first ink layer, and the second ink layer For example, a solid pattern that completely covers the barcode pattern in a decolored state is printed. As this ink, an ink having infrared absorption in a colored state is used. Further, a concealing layer is printed on the first and second ink layers with mixed-color black ink.
A heating device and a device that reads barcodes with infrared rays are installed in the product and operated as follows.
First, the forgery prevention medium of the present invention is attached to the consumable.
Next, when this consumable is set in a product, the barcode of the anti-counterfeit medium is read by a reader, and authenticity and use history are determined. If the barcode that should be originally disappeared, it has been used, and if it has a solid pattern, it may be a modified product.
Next, when the consumables are used up, heat is quickly applied to the anti-counterfeit medium of the present invention by the heating device so that the bar code pattern as the first ink layer is erased.
In this way, used consumables can be distinguished, and the anti-counterfeit medium of the present invention can be prevented from being peeled off and reused.

Specific examples of the present invention will be described below.
A thermal ink using a leuco dye was prepared as a printing ink for the first and second ink layers. This ink is decolored by heating to 70 ° C., and color is developed by cooling to −20 ° C., but it changes from the colored or decolored state at room temperature where there is no change from 0 ° C. to 40 ° C. There is nothing.
A high-quality paper was prepared as a substrate, and a hologram was transferred thereon as a forgery prevention layer. Further, the thermal ink was printed thereon by offset printing. As the first ink layer, the thermal ink is cooled and colored to print “GENUINE”, and the second ink layer is heated to erase the color and the character “VOID” is printed. Printed. As shown in FIG. 7, these printings were performed by overlapping the characters by half.

<Effect>
In the anti-counterfeit medium created as described above, only the characters “GENUINE” were visible on the hologram. Assuming that the product with the anti-counterfeit medium was used up, the anti-counterfeit medium was heated with a heat roller at 100 ° C., and the word “GENUINE” disappeared completely. As a result, reuse of the forgery prevention medium could be prevented.
Furthermore, when this anti-counterfeit medium was cooled to −20 ° C., the characters “VOID” appeared at the same time as the characters “GENUINE”, and the alteration for illegal reuse could be prevented.
As described above, the effects of the invention were confirmed.

DESCRIPTION OF SYMBOLS 1 ... Base material 2 ... 1st ink layer 3 ... 2nd ink layer 4 ... Anti-counterfeiting functional layer 5 ... Concealing layer 20 ... 1st Ink layer (colored state)
30 ... Second ink layer (color-erased state)
21: First ink layer (colored state)
31 ... Second ink layer (colored state)
22 ... 1st ink layer (decolored state)
32 ... Second ink layer (decolored state)

Claims (7)

An anti-counterfeit functional layer on the substrate;
First and second ink layers that reversibly change color with temperature change are provided,
The first ink layer and the second ink layer have the same composition, and the first ink layer is changed in color by changing the temperature to change the color from the second ink layer. An anti-counterfeit medium characterized by An anti-counterfeit functional layer on the substrate;
First and second ink layers that are reversibly developed or decolored by temperature changes are provided,
The first and second ink layers have the same composition, and are provided in a state where the first ink layer is colored by temperature change, and the second ink layer is provided in a decolored state. An anti-counterfeit medium that is characterized.   3. The forgery prevention medium according to claim 2, wherein the first and second ink layers have absorption in the infrared region only in a colored state.   The anti-counterfeit medium according to claim 2 or 3, wherein the first and second ink layers do not change from a decolored or colored state in an environment between -10 ° C and 60 ° C. On the base material, a forgery prevention functional layer and a first and second ink layer that are reversibly developed or decolored by a temperature change are provided separately, and further , light in the infrared region is transmitted thereon , and A third ink layer having a function of not transmitting light in the visible region is provided as a concealing layer ;
The first and second ink layers have the same composition, and by changing the temperature,
An anti-counterfeit medium, wherein the first ink layer is provided in a colored state and the second ink layer is provided in a decolored state.   6. The forgery prevention medium according to claim 5, wherein the first and second ink layers have absorption in the infrared region only in a colored state.   The forgery prevention medium according to claim 5 or 6, wherein the first and second ink layers do not change from a decolored or colored state in an environment between -10 ° C and 60 ° C.