JP5679165B2 - Label adhesive, label material and counterfeit detection system - Google Patents

Description

  The present invention relates to a label pressure-sensitive adhesive that emits electromagnetic waves that can be detected by a scanner, a label material, and a forgery detection system.

  Identification cards such as passports and driver's licenses are provided with a face photo field and a signature field, but in recent years there have been cases where these have been altered, altered and misused.

  For this reason, a technique relating to a label material that forms an ink layer in the form of a barcode pattern that can be detected by an infrared scanner on a transparent sheet, and is attached to a face photograph field or a sign field with an adhesive is disclosed. (For example, refer to Patent Document 1).

Japanese Patent Laid-Open No. 06-138826

  However, when such a method is adopted, there is a problem that a step of forming a barcode pattern with invisible ink and a step of applying an adhesive are required.

  The present invention has been made in view of such problems, and the object of the present invention is to provide a label adhesive, a label material, and a counterfeit detection system that can be detected by a scanner and can be easily manufactured. There is.

The present invention solves the above problems by the following means. In addition, in order to make an understanding easy, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this.
(1) A label pressure-sensitive adhesive containing an adhesive and an electromagnetic wave generator , wherein the electromagnetic wave generator contains at least one of Y, Gd, Lu and La, and contains Yb. An adhesive for labels .
(2) An adhesive, an electromagnetic wave generator, and a dispersant that disperses the electromagnetic wave generator in the adhesive, and the electromagnetic wave generator contains at least one of Y, Gd, Lu, and La. And the adhesive for labels characterized by containing Yb .
(3) The label pressure-sensitive adhesive according to (1) or (2), wherein the electromagnetic wave generator is excited by an electromagnetic wave and emits an electromagnetic wave having a specific wavelength.
(4) The label pressure-sensitive adhesive according to (1) or (2), wherein the electromagnetic wave generator is contained in the label pressure-sensitive adhesive in an amount of 1% by mass to 50% by mass.
(5) A label material comprising a base sheet and an adhesive layer provided on the base sheet, wherein the adhesive layer is for the label according to any one of (1) to (4) . A label material characterized by being formed of an adhesive.
(6) The label material according to (5) , wherein the pressure-sensitive adhesive layer is formed in a pattern.
(7) said base sheet, said (5), wherein the label material, characterized by transmitting 95% or less than 5% of the electromagnetic waves emitted from the label adhesive.
(8) label material, a scanner for detecting an electromagnetic wave of a specific wavelength emitted from the label stock, and a forgery detection system comprising a notification device for notifying whether counterfeit, the label material is the ( 5) to the label material according to any one of (7) , wherein when the scanner detects the electromagnetic wave, the scanner sends a predetermined signal to the notification device, and the notification device receives a signal from the scanner, The forgery detection system characterized by showing determination of .

ADVANTAGE OF THE INVENTION According to this invention, the adhesive for labels which can be detected with a scanner and can be manufactured easily, a label material, and a forgery detection system can be provided.
Further, since the electromagnetic wave generator is mixed not in the ink but in the pressure-sensitive adhesive, the presence of the electromagnetic wave generator is hardly recognized even if there is some coloring or the like.
Further, by using the electromagnetic wave generator together with the pressure-sensitive adhesive, the electromagnetic wave generator cannot be completely removed unless the pressure-sensitive adhesive is completely removed, and forgery can be made difficult.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

(Adhesive for labels)
The pressure-sensitive adhesive for labels of the present invention contains a pressure-sensitive adhesive and an electromagnetic wave generator.
The label pressure-sensitive adhesive of the present invention preferably contains a pressure-sensitive adhesive, an electromagnetic wave generator, and a dispersant for dispersing the electromagnetic wave generator in the pressure-sensitive adhesive.

  The pressure-sensitive adhesive is not particularly limited, and for example, an emulsion, solvent, or hot-melt pressure-sensitive adhesive is used. The material is arbitrary such as acrylic or rubber. The adhesive property is selected according to the kind of the adherend. For example, if it is not necessary to peel it off after it has been pasted, it is desirable to have an adhesive property called strong adhesive, ultra-strong adhesive having a higher adhesive strength, or frozen paste.

  The pressure-sensitive adhesive is preferably contained in the label pressure-sensitive adhesive in an amount of 50% by mass to 99% by mass.

An electromagnetic wave generator means an object that can be a source of electromagnetic waves.
The electromagnetic wave generator is preferably an object that is excited by a specific energy such as an electromagnetic wave and emits an electromagnetic wave having a specific wavelength. The electromagnetic waves emitted by the electromagnetic wave generator are radio waves, ultraviolet rays, infrared rays, visible rays, and the like. For example, an infrared generator can be used.
The electromagnetic wave generator is preferably an inorganic substance. This is because an electromagnetic wave generator made of an inorganic substance has excellent weather resistance and can generate an electromagnetic wave regardless of the passage of time.

The electromagnetic wave generator preferably contains at least one of Y (yttrium), Gd (gadolinium), Lu (lutetium), and La (lanthanum), and preferably contains Yb (ytterbium).
For example, an infrared light emitting phosphor manufactured by Nemoto Special Chemical Co., Ltd. is suitably used as an electromagnetic wave generator.

Specifically, an infrared light emitting phosphor containing Lu (lutetium), Yb (ytterbium) and Nd (neodymium) can be used as an electromagnetic wave generator.
An infrared light emitting phosphor containing lanthanum (La), ytterbium (Yb) and neodymium (Nd) can be used as an electromagnetic wave generator.
Furthermore, a phosphor containing any one of Y (yttrium), Gd (gadolinium), and La (lanthanum) and containing ytterbium (Yb) and erbium (Er) should be used as an electromagnetic wave generator. Can do.
Also, the molybdate-based infrared light emitting phosphor can be used as an electromagnetic wave generator.

  The electromagnetic wave generator is preferably contained in the label pressure-sensitive adhesive in an amount of 1% by mass to 50% by mass. Moreover, it is more preferable that they are 1 mass% or more and 10 mass% or less, and it is further more preferable that they are 1 mass% or more and 3 mass% or less.

The electromagnetic wave generator is preferably dispersed uniformly in the pressure-sensitive adhesive.
As a method of uniformly dispersing, there are a method of heating at the time of mixing and a method of adding a dispersing agent.

As the dispersant, a commercially available surfactant (emulsifier) can be used.
The surfactant can disperse the electromagnetic wave generator in the pressure-sensitive adhesive, and can particularly favorably disperse the electromagnetic wave generator in the emulsion-based pressure-sensitive adhesive.
The dispersant is preferably used in a state of being mixed with water or ethanol to form a dispersion.
The dispersion is preferably contained in the label pressure-sensitive adhesive in an amount of 3% by mass to 5% by mass.

The pressure-sensitive adhesive for labels of the present invention can be easily produced by mixing a pressure-sensitive adhesive and an electromagnetic wave generator.
The pressure-sensitive adhesive for labels of the present invention can be suitably used for a label having a forgery prevention function.
Specifically, the label pressure-sensitive adhesive functions as a pressure-sensitive adhesive for sticking the label to the adherend, and also functions as an element for forgery determination that emits electromagnetic waves.

(Label material)
The label material of this invention is a label material provided with a base material sheet and an adhesive layer provided on the base material sheet, and the adhesive layer is formed of the above-mentioned adhesive for labels. It is characterized by that.

  Base sheets are high-quality paper, coated paper, art paper, polyolefin resin such as polyethylene and polypropylene, polyester (polyethylene terephthalate) resin, polycarbonate resin, polyvinyl chloride and chlorinated polyvinyl chloride obtained by further chlorination For example, a film made of a vinyl chloride resin or the like, a synthetic paper obtained by adding a filler to polyethylene, polypropylene, or the like to be processed into a fiber like paper, and a laminate or composite material of these.

The substrate sheet preferably transmits 5% or more and 95% or less of electromagnetic waves emitted from the label pressure-sensitive adhesive.
This is because if the transmittance is 5% or more and 95% or less, the intensity of the electromagnetic wave that is transmitted can be easily adjusted depending on the thickness of the base sheet.
Further, by changing the thickness and material of the base sheet for each part of the label, the degree of infrared transmission can be changed to form a pattern.

The pressure-sensitive adhesive layer is preferably formed on the entire surface of the base sheet.
This is because detection by a scanner is facilitated by emitting electromagnetic waves from a wide range.

Moreover, it is preferable that the adhesive layer is formed in pattern shape.
The pressure-sensitive adhesive layer formed in a pattern functions only as a pressure-sensitive adhesive layer and functions as a forgery prevention mark.
A bar code pattern or the like can be used as the pattern.
Furthermore, the pattern of a base material sheet and an adhesive layer can also be combined by changing the thickness and material of a base material sheet for every part of a label, and forming an adhesive layer in pattern shape.

Since the label material of the present invention can be easily manufactured only by the step of applying the pressure-sensitive adhesive by omitting the step of forming the ink layer, time and cost can be reduced.
In the label material of the present invention, the electromagnetic wave generator is mixed not in ink but in an adhesive. Therefore, even if some coloration or the like occurs in the pressure-sensitive adhesive due to the mixing of the electromagnetic wave generator, there is an advantage that the presence of the electromagnetic wave generator is hardly recognized if the base sheet is opaque.
In addition, since the label material of the present invention uses the electromagnetic wave generator together with the adhesive instead of the ink, the electromagnetic wave generator cannot be completely removed unless the adhesive is completely removed, and mixed into the ink. Can make counterfeiting difficult.

The label material of this invention can be equipped with the peeling sheet laminated | stacked on an adhesive layer so that peeling is possible.
As the release sheet, a generally used release sheet is used. For example, paper with silicone coated on the surface through a polyethylene film, kraft paper, glassine paper, high-quality separator, various plastic films, etc., coated with super calender after clay coating are exemplified.

The label material of the present invention can be easily produced by applying or spraying an adhesive to the base material sheet.
And the application of the label material of the present invention is not limited to various identification cards such as passports and driver's licenses, such as stock certificates, bonds, checks, passbooks, lottery tickets, boarding tickets, coupon tickets, commuter passes, etc. Listed are securities-related products such as securities, ID cards, credit cards, cash cards, gift cards and other plastic cards, and prepaid cards represented by telephone cards.
In addition, the label material itself can be used by being attached to an object to be attached as a delivery slip for a courier, a parts label, or a general identification label.

  The electromagnetic wave emitted from the adhesive layer is detected by a detection device such as a scanner.

(system)
The forgery detection system of the present invention is a forgery detection system including a label material, a scanner that detects electromagnetic waves of a specific wavelength emitted from the label material, and a notification device that notifies whether or not the forgery is forgery. In the label material described above, the scanner causes the notification device to display that it is not counterfeit when it detects electromagnetic waves.
The scanner can also make the notification device emit a sound indicating that it is not counterfeit when it detects electromagnetic waves.

The scanner is not particularly limited as long as it can detect electromagnetic waves such as infrared rays, and a hand scanner or a fixed installation scanner is used.
When the scanner detects an electromagnetic wave from the adhesive layer, it sends a predetermined signal to the notification device to display that it is not forgery.
The display may be as simple as ◯ or X, or may be such that the distance between the label and the scanner can be estimated by displaying the strength of the electromagnetic wave.
Further, when the electromagnetic wave is detected, the scanner can send a predetermined signal to the notification device to make a sound indicating that it is not forgery.
The sound may be as simple as a chime sound, or may indicate the distance between the label and the scanner by indicating the strength of the electromagnetic wave.

The notification device is a device that receives a signal from the scanner and indicates authenticity based on a display or sound.
A monitor or a speaker can be used as the notification device.
Further, a personal computer including a monitor and a speaker can be used as the notification device.

Examples of the present invention will be described in detail below.
The inventors conducted the following experiment.

[Example 1]
(Adhesive for labels)
100 parts by mass of an adhesive (manufactured by Toyo Ink Manufacturing Co., Ltd., trade name “E95K”, emulsion system) was prepared.
2 parts by mass of an electromagnetic wave generator (manufactured by Nemoto Special Chemical Co., Ltd., trade name “IRS-F”, emitting infrared light having a wavelength of 980 nm when irradiated with infrared light having a wavelength of 850 nm) was prepared.
0.002 part by mass of a dispersant (manufactured by San Nopco, trade name “Nopcosperth 44C”) was prepared.
1 part by weight of water was prepared.
First, a dispersant and water were mixed well to obtain a dispersion.
Next, the dispersion and the electromagnetic wave generator were mixed well to obtain an electromagnetic wave liquid.
And electromagnetic wave liquid and an adhesive were mixed well and the adhesive for labels of Example 1 was manufactured.

(Label material)
A base sheet (manufactured by Nippon Daishowa Paperboard Co., Ltd., trade name “Ibest W160g paper”, 50 mm × 50 mm, thickness 155 μm, infrared ray with a wavelength of 850 nm is transmitted 70%) was prepared.
On the base material sheet, the label pressure-sensitive adhesive of Example 1 was applied using a # 10 Meyer bar so as to have a thickness of 10 μm and dried to produce the label material of Example 1.
A commercially available high-quality separator was placed on the pressure-sensitive adhesive layer as a release sheet to protect the pressure-sensitive adhesive layer.

[Example 2]
The dispersant of Example 1 was not used. Other conditions were the same as in Example 1, and the label adhesive of Example 2 and the label material of Example 2 were produced.

[Comparative Example 1]
100 parts by mass of a commercially available ink (trade name “UV161 medium” manufactured by TOKA) was prepared.
2 parts by mass of an electromagnetic wave generator (manufactured by Nemoto Special Chemical Co., Ltd., trade name “IRS-F”, emitting infrared light having a wavelength of 980 nm when irradiated with infrared light having a wavelength of 850 nm) was prepared.
And these were mixed well and the ink for comparative example 1 was manufactured.

A base sheet (manufactured by Nippon Daishowa Paperboard Co., Ltd., trade name “Ibest W160g paper”, 50 mm × 50 mm, thickness 155 μm, infrared ray with a wavelength of 850 nm is transmitted 70%) was prepared.
And the ink for said comparative example 1 was apply | coated so that it might become thickness of 2 micrometers using a commercially available color change machine on the base material sheet, and it dried, and formed the ink layer.
Then, on this ink layer, a pressure-sensitive adhesive (manufactured by Toyo Ink Manufacturing Co., Ltd., trade name “E95K”, emulsion type) was applied to a thickness of 10 μm using a No. 10 Mayer bar and dried, and a comparative example. 1 label material was manufactured.
A commercially available high-quality separator was placed on the pressure-sensitive adhesive layer as a release sheet to protect the pressure-sensitive adhesive layer.

  Table 1 shows the main conditions of Examples and Comparative Examples.

<Evaluation>
(Manufacturing process)
Since Example 1 and Example 2 can manufacture a label material only by 1 process of apply | coating an adhesive, evaluation was set as (circle).
On the other hand, since the comparative example 1 requires two processes, the process of forming an ink layer and the process of apply | coating an adhesive, in order to manufacture a label material, evaluation was set as x.

(Aggregation test)
The pressure-sensitive adhesives of the examples were allowed to stand at room temperature for 7 days, and then applied to the substrate sheet and dried.
Further, the ink and pressure-sensitive adhesive of the comparative example were allowed to stand at room temperature for 7 days, and then applied to the base sheet and dried.
Then, the application state was confirmed visually, and the aggregation test was evaluated according to the following criteria.
A: There is no aggregation and there is no problem in practical use. ○: There is agglomeration but there is no problem in practical use.

  The evaluation results are shown in Table 2.

As is clear from Table 2, in Example 1 and Example 2, the process of forming the ink layer is omitted, and the label can be manufactured by only one process of applying the adhesive, so that time and cost can be greatly reduced. It was.
In particular, the label pressure-sensitive adhesive of Example 1 was able to suppress the aggregation of electromagnetic wave generators by mixing a dispersant, and could be used without any practical problems even when left for a long time.
On the other hand, in Comparative Example 1, the process of forming the ink layer and the process of applying the pressure-sensitive adhesive are necessary, so that time and cost are excessive as compared with Example 1 or Example 2.

  The present invention is not limited to the embodiment described above.

Claims (8)

An adhesive for a label containing an adhesive and an electromagnetic wave generator ,
The electromagnetic wave generator contains at least one of Y, Gd, Lu, and La, and contains Yb. An adhesive, an electromagnetic wave generator, and a dispersant for dispersing the electromagnetic wave generator in the adhesive, the electromagnetic wave generator containing at least one of Y, Gd, Lu, and La; and A pressure-sensitive adhesive for labels , containing Yb . The pressure-sensitive adhesive for labels according to claim 1 or 2, wherein the electromagnetic wave generator is excited by an electromagnetic wave and emits an electromagnetic wave having a specific wavelength. The label adhesive according to claim 1 or 2, wherein the electromagnetic wave generator is contained in the label adhesive in an amount of 1 mass% to 50 mass%. It is a label material provided with a base material sheet and the adhesive layer provided on the said base material sheet, Comprising: The said adhesive layer was formed with the adhesive for labels in any one of Claim 1 thru | or 4 . Label material characterized by being. The label material according to claim 5 , wherein the pressure-sensitive adhesive layer is formed in a pattern. The label material according to claim 5 , wherein the base material sheet transmits 5% or more and 95% or less of electromagnetic waves emitted from the label pressure-sensitive adhesive. A counterfeit detection system comprising a label material, a scanner that detects electromagnetic waves of a specific wavelength emitted from the label material, and a notification device that informs whether or not it is counterfeit,
The label material is the label material according to any one of claims 5 to 7 ,
When the scanner detects the electromagnetic wave, it sends a predetermined signal to the notification device,
The forgery detection system, wherein the notification device receives a signal from the scanner and indicates a true / false determination .