JPH08156474A - Tampering preventing label for heat sensitive sheet - Google Patents

Abstract

PURPOSE: To decide an illegal matter on a heat sensitive sheet at a glance by setting thermal conductivity via a release layer and an adhesive layer to a specific value or less in a label in which a base material, the release layer and the adhesive layer are sequentially laminated. CONSTITUTION: In order to prevent tampering with a document made of a heat sensitive sheet, a base material 1, a release layer 2 and an adhesive layer 3 are sequentially laminated in a label to form a protective film on the surface of a printed matter in such a manner that the material 1 and the layer 2 are releasable therebetween and the thermal conductivity via the layers 2 and 3 is set to 10 (cal/sec/cm2 deg.C/cm) or less. Or, finely particulated developer and leuco dye or photochromic material for coloring with ultraviolet or infrared rays are dispersed in the layer 2 or 3 as required. According to this, the conductivity of the layer 2 or 3 is low, and the sheet is heated to effectively prevent an illegal additional writing.

Description

Detailed Description of the Invention

[0001]

[Industrial application] This is a label for forming a protective film on the surface of a printed material in order to prevent fraudulent documents such as air tickets and lift tickets made of thermal paper.

[0002]

2. Description of the Related Art Conventionally, a ticket having information heat-sensitively printed on its surface (hereinafter referred to as a ticket) has been widely used for lift tickets, receipts and the like because it is easy to issue. However, since the display by the heat-sensitive printing is usually composed of fixed characters, it is easy to make an illegal act by additionally writing if a device capable of heat-sensitive printing such as a word processor is used. In addition, it is not easy to find a fraud that uses the same or similar font as the displayed font as the font used for this additional writing.

Therefore, in the case of an expensive ticket such as an airline ticket, information is printed on the front surface and information is recorded on the magnetic layer provided on the back surface. Therefore, by checking the printed information on the surface with the information recorded on the magnetic layer, it was possible to detect the illegality.

[0004] For tickets made of paper other than thermal paper, it is common practice to display information on the ticket to prevent fraud, and then attach a film on the information to form a protective film. It was being appreciated. In other words, when a ticket in which the displayed information is written by handwriting or type instead of thermal printing is used, the protective film formed makes it impossible to additionally write a pen or the like, so this fraud prevention method is effective. there were. Therefore, it has been possible to consider forming a protective film as a measure against fraud even for a ticket made of thermal paper.

[0005]

However, the above-mentioned fraud prevention method has the following problems.

That is, the ticket provided with the magnetic layer cannot read the data on the magnetic layer unless there is a device capable of reading the data. Therefore, only a specific person can know the fraud. .

[0007] As for the fraud prevention measure in which a protective film is formed on the thermal paper and additional information cannot be added to the displayed information, if the thermal conductivity of the protective film is high, the protective film is formed. It was also possible to perform heat printing in the state. Alternatively, it is possible to peel off the protective film and additionally write by heating printing, and then attach another film to form a pseudo protective film, in which case it was difficult to detect fraud.

[0008]

In order to solve the above problems, the present invention comprises a base material, a peeling layer, and an adhesive layer, which are laminated in this order, and the base material and the peeling layer are The label is peelable between the layers, and has a thermal conductivity of 20 (cal) through both the peeling layer and the adhesive layer.
/ Sec / cm ² ° C / cm) or less.

Further, according to a second aspect of the present invention, there is provided a label in which a base material, a peeling layer, and an adhesive layer are laminated in order,
The peeling layer or the pressure-sensitive adhesive layer is characterized in that a color developer and a leuco dye which are finely divided to 10 μm or less are dispersed.

According to a third aspect of the present invention, there is provided a label in which a base material, a peeling layer and a pressure-sensitive adhesive layer are laminated in this order, and the space between the peeling layer and the pressure-sensitive adhesive layer is reduced to 10 μm or less. It is characterized in that a color-forming layer in which the above-described color-developing agent and a color-forming agent comprising a leuco dye are dispersed is provided.

According to a fourth aspect of the present invention, there is provided a label in which a base material, a peeling layer and an adhesive layer are laminated in this order, and the peeling layer or the adhesive layer is colored by ultraviolet light or infrared light. The photochromic material is dispersed.

According to a fifth aspect of the present invention, there is provided a label in which a base material, a peeling layer, and an adhesive layer are laminated in this order.
A coloring layer in which a photochromic material that emits ultraviolet light or infrared light is dispersed is provided between the peeling layer and the adhesive layer.

[0013]

Therefore, according to the label for preventing fraud of the thermal paper according to the first aspect, the protective film by the peeling layer can be easily formed on the thermal paper. Further, since the thermal conductivity of the peeling layer or the pressure-sensitive adhesive layer is low, it is impossible to additionally write by heating the thermal paper.

According to the tamper-proof label for heat-sensitive paper of claim 2, since the heat-sensitive color former is dispersed in the peeling layer or the pressure-sensitive adhesive layer, when the heat-sensitive paper is heated, an additional attempt is made to write it. The additional information will be printed in a color different from the color of the information described in advance.

According to the tamper-proof label for thermal paper of claim 3, since the peeling function and the heat coloring function are divided into the peeling layer and the coloring layer, the label made of a material selected by emphasizing the respective functions. Can be obtained.

According to the tamper-proof label for heat-sensitive paper of claim 4, since the photochromic material is dispersed in the protective film or the adhesive layer, it is colored when irradiated with light of a predetermined wavelength.

In the label for preventing fraud of thermal paper according to claim 5, since the peeling function and the coloring function are divided into the peeling layer and the coloring layer, the label made of a material selected with emphasis on each function. Can be obtained.

[0018]

An embodiment of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a sectional view of a fraud prevention label of thermal paper in this embodiment, FIG. 2 is an example of sticking the fraud prevention label, and FIG. 3 is fraud prevention on an object to be stuck. It is an example of using the label for use. In the figure, 1 is a base material, 2 is a peeling layer,
3 is an adhesive layer, 4 is a peeling surface, 5 is a paper strip, 6 is a label for preventing fraud, 7 is an object to be attached, and 8 is an information display column.

The substrate 1 is made of a film,
As the material, paper, resin, metal or the like can be selected according to the purpose. Also, the thickness and color can be selected according to the purpose. The peeling layer 2 is formed by applying ink, and the ink having a small thermal conductivity is used. Specifically, the thermal conductivity is 20 (cal / sec /
cm ² ° C / cm) or less, for example, vinyl chloride having a thermal conductivity of 3.0 to 7.0, polyester of 10 to 16 and polyethylene of 8.0 to 12.4 are made into ink. Use one. The ink is not limited to transparent or colored, and can be selected according to the purpose of use of the tampering prevention label 6.

The transparent ink used for the peeling layer 2 of this embodiment includes vinyl chloride / polyester resin (polymerization degree: 5).
00), as a tackifier, a softening point of 120
℃, resin and tackifier composition ratio 95: 5
Was added. Alkylphenol resin, xylene resin, petroleum resin, coumarone indene resin, terpene resin, rosin and the like are generally used for this tackifier, and can be arbitrarily selected.

Here, the base material 1 and the release layer 2 form a peeling surface 4 between the layers, and when a force is applied to the tampering prevention label 6, both the base material 1 and the release layer 2 are formed. It is necessary to bond them with a strength that allows them to be easily peeled off without affecting.

As the pressure-sensitive adhesive layer 4, a generally used pressure-sensitive adhesive can be used, but the adhesive strength between the substrate 1 and the peeling layer 2 is A, and the pressure-sensitive adhesive layer 3 and the object 7 to be attached are Adhesive strength B
Then, A <B must be satisfied.

A method of manufacturing the fraud prevention label 6 of this embodiment will be described below. First, the transparent ink having the above-described composition is coated on the surface of the base material 1 by the gravure method to form the peeling layer 2. Then, the adhesive layer 3 is laminated on the peeling layer 2 and coated with an acrylic pressure-sensitive adhesive to a thickness of 20 μmp to form the pressure-sensitive adhesive layer 3, and then a peeling paper 5 is attached to the raw sheet of the tamper-proof label of this embodiment. To manufacture.

The object 7 to be stuck is made of thermal paper. Further, it is also possible to bond general paper and thermal paper, but in this case, the thermal paper side is called the surface.

A method of using the manufactured tampering prevention label 6 will be described below. In advance, the surface of the sticking target 7 is printed in black to indicate that it is used by heating. Here, the printed portion is referred to as an information display column 8. For example, if the sticking target 7 is an airline ticket, as shown in FIG.
The name of the user is printed.

Then, the flap paper 5 is peeled off from the tampering prevention label 6 produced as described above, and the exposed adhesive 3 is attached so as to cover the information display column 8.

Next, the tampering prevention label 6 is attached.
Only the base material 1 is peeled from. As described above, the base material 1 is easily peeled from the peeling surface 4. Then, as shown in FIG. 3, a protective film of the peeling layer 2 is formed on the information display column 8. As described above, this protective film is formed by applying ink, and the peeling surface 4 has a glossy feeling. Therefore, additional writing on the protective film is impossible. Further, since the transparent ink is used, the information displayed in the information display field 8 can be read. When the peeling layer 2 formed by applying the ink is peeled off from the object 7 to be attached, the ink film cannot be peeled off by one sheet and cannot be neatly peeled off.

As described above, even if an attempt is made to erroneously perform additional writing by heat-treating the sticking object 7 on which the protective film is formed, vinyl chloride acetate and polyester resin which are the main components of the protective film. Since the thermal conductivity of is low, it is impossible to additionally write on the above information.

(Embodiment 2) FIG. 4 is a sectional view of a tampering prevention label in this embodiment, and FIG. 5 is an explanatory view of a fluoran dye. The same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Further, the points in which this embodiment is different from the first embodiment will be shown below.

In the figure, 11 is a tamper-proof label, 12 is a color former, 12 'is a dye, and 13 is a developer. A leuco dye (hereinafter, referred to as a color former) and a color developer, which are microencapsulated in advance, are dispersed in the ink used for the release layer 2 that constitutes the tampering prevention label 11. The main component of the ink is the same as in Example 1.

The tampering prevention label 11 manufactured in the same manner as in Example 1 using the ink in which the color former and the color developer are dispersed has the peeling layer 14 on the peeling layer 14 as shown in FIG. The color former 12 and the color developer 13 are dispersed.

As the color former 12, a leuco dye for heat-sensitive color development is used. As the leuco dye, a general leuco dye can be used, and an example thereof is a fluoran dye 12 'shown in FIG. Although the dye 12 'is colorless, it has a melting point of 125 to 131 degrees, and when heated above the melting point temperature, it reacts with the developer 13 to develop a color and become green. As the developer 13, a general compound such as a phenol compound having a melting point of about 90 to 200 ° C. can be used, but it is better to select it depending on the problem of reactivity with the color developer 12 and the stability of the color image.

The tampering prevention label 1 shown in FIG.
1 is the same as the tampering prevention label 6 of Example 1, after being stuck on the information display column 8 in which the information is heated and printed in black,
Only the substrate 1 is peeled off. Then, in the information display column,
A protective film for the peeling layer 14 is formed.

It is assumed that the information display column 8 on which the protective film is formed is additionally written by thermal printing. Then, the color former 12 dispersed in the protective film becomes green when heated. Since the numbers in the information display field 8 are printed in black, it can be seen at a glance that the information displayed in green has been tampered with.

(Embodiment 3) FIG. 6 is a sectional view of the tampering prevention label in this embodiment, and FIG. 7 is a spirobenzopyran as an example of the functional material of this embodiment. The same parts as those in the first or second embodiment are designated by the same reference numerals, and the description thereof will be omitted. Further, the difference of this embodiment from the first or second embodiment will be shown below.

In the figure, 21 is a tamperproof label, 22 is a functional material, and 23 is spirobenzopyran.

The ink used for the peeling layer 2 which constitutes the tampering prevention label 21 can be the one having the composition described in Example 1 as a main component thereof, but the photochromic material microencapsulated in the ink. 22 (hereinafter referred to as a functional material) is dispersed. Further, as the main component of the ink, the one having the constitution described in Embodiment 1 is used.

Then, in the tampering prevention label 21 manufactured in the same manner as in Example 1 using the ink in which the functional material 22 is dispersed, the peeling layer 14 is formed on the peeling layer 14 as shown in FIG.
The functional material 22 is dispersed as shown in FIG.

Here, the functional material 22 refers to a material that absorbs light energy and changes into a metastable substance B exhibiting an absorption spectrum different from that of the original substance A. As such a functional material 22, photocleavage ion-generating type compounds, photoring-closing / ring-closing type compounds, trans-cis type compounds and redox type compounds are generally known. Those described in 64-10195 can be used. For example, the spirobenzopyran 23 shown in FIG. 6 develops a color when irradiated with ultraviolet light, and as the color of the color development, purple, blue, red and orange are obtained by the substituent (—R). Depending on the application, a substituent can be selected to develop an arbitrary color.

The shape of the functional material to be dispersed may be any shape such as ink, powder or pellet.

The tampering prevention label 11 shown in FIG.
Similarly to the tampering prevention label 6 of Example 1, after sticking on the information display column 8, only the base material 1 is peeled off. Then, the protective film of the peeling layer 14 is formed on the sticking target 7.

The peeling layer 14 is peeled off from the sticking object 7 on which the protective film is formed, and the information is printed on the exposed information display field 8 to falsify it, and then the film is stuck. It is assumed that a fraudulent provision of the pseudo peeling layer has been performed. In this case, it is possible to determine the presence or absence of tampering only by shining an ultraviolet light on the protective film.

That is, in the case of the tampering prevention label 21 in the present embodiment, when the ultraviolet light is irradiated, the functional material 22 dispersed in the peeling layer 14 is colored as described above. However, even if a general film is irradiated with ultraviolet light, no color is generated, and therefore, the pseudo peeling layer is also not colored, so that it is possible to determine whether or not there is any illegality only by irradiating ultraviolet light. Further, as described above, the color development of the functional material 22 is in a metastable state, so that the functional material 22 becomes transparent with the passage of time. Therefore, there is an advantage that no trace of the ultraviolet light is applied and the tampering prevention is not generally known.

The present invention is not limited to the above embodiment. For example, the peeling layer may be formed by pasting a film instead of forming the ink.

The base material may be composed of a plurality of layers. For example, when paper and a film are used together and ink is applied to the film to form a base material and a peeling layer, the applied ink does not soak into the base material.

Further, as the color former used in Example 2, phenol resin having a thermal conductivity of 4 to 7, 7-1
0 urea resin, 7-10 melamine resin, 11-19
Epoxy resin, 1-3 polystyrene, 1-9 AB
S resin, 4-6 acrylic resin, 3.3 polypropylene 6 polytetrafluoroethylene, 5.2-5.8 polyamide, 5.5 polyacetal, 4.6 polycarbonate, 4-8 acetyl It can be arbitrarily selected from cellulose and the like.

Further, the leuco dye and developer used in Example 2 are preferably microencapsulated or ultrafine particles of several μm or less in order to obtain transparency.

The color to be developed in Examples 2 and 3 can be changed by adjusting the color former or photochromic material used, as described above.

[0050]

As described above, the present invention provides a tamper-proof label for thermal paper, which is produced by using the same material as a general label and in the same manner as a general label. be able to.

In the label for preventing fraud of thermal paper according to claim 1, the thermal conductivity through the adhesive layer and the peeling layer which serves as a protective film of the thermal paper is low. Therefore, even if illegal printing is performed on the thermal paper by heating, since the protective film blocks heat, printing cannot be performed and tampering can be prevented.

In the label for preventing fraud of heat-sensitive paper according to claim 2, a developer and a leuco dye, which are heat-sensitive color formers, are dispersed in a peeling layer and a pressure-sensitive adhesive layer which are protective films of the heat-sensitive paper. . Therefore, if an attempt is made to improperly print on the thermal paper by heating, the color will develop in the protective film. As a result, the display made in advance and the illegal printing are obviously different from each other, and the tampering can be prevented.

In the label for preventing fraud of thermal paper according to claim 3, a color forming layer in which the thermosensitive color developing agent is dispersed is provided between the adhesive layer and the peeling layer. Therefore, the coloring effect of the coloring layer can be adjusted.

In the label for preventing fraud of thermal paper according to claim 4, the photochromic material is dispersed in the peeling layer and the pressure-sensitive adhesive layer which are protective films of the thermal paper. Therefore, after peeling the protective film from the thermal paper, if another film is adhered to provide a pseudo protective film, if the photochromic material is irradiated with light having a wavelength to develop a color, the protective film is provided in advance. Whether it is a pseudo protective film or not can be easily discriminated and tampering can be prevented.

In the label for preventing fraud of heat-sensitive paper according to claim 5, a color forming layer in which the photochromic material is dispersed is provided between the adhesive layer and the peeling layer. Therefore, the coloring effect of the coloring layer can be adjusted.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a “heat paper tampering prevention label” according to a first embodiment.

FIG. 2 is an example of affixing a “falsification prevention label for thermal paper” of Example 1.

FIG. 3 is an example of forming a protective film on an object to be stuck in Example 1.

FIG. 4 is a cross-sectional view of a “tamper proof label for thermal paper” of Example 2.

5 is a structure of a fluoran dye used in Example 2. FIG.

FIG. 6 is a cross-sectional view of a “falsification preventing label for thermal paper” according to a third embodiment of the present invention.

FIG. 7: Spirobenzapyran 23 used in Example 3
The structure is as follows.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Substrate 2, 14 ... Peeling layer 3 ... Adhesive layer 4 ... Peeling surface 5 ... Release paper 6,11, 21 ... Tamper proof label 7 ... Adhesion target 8 ... Information display column 12 ... Coloring agent 12 ' ... Dye 13 ... Developer 22 ... Functional material 23 ... Spirobenzapyran

Claims (5)

[Claims] 1. A base material, a peeling layer, and an adhesive layer are laminated in this order, and the base material and the peeling layer are labels which can be peeled between the layers, and the peeling layer and the adhesive layer. The thermal conductivity through both
20 (cal / sec / cm ² ° C / cm) or less, a label for preventing fraud of thermal paper. 2. A label in which a base material, a peeling layer, and an adhesive layer are laminated in this order, and the developing layer or the adhesive layer contains a developer and a leuco dye which are microparticulated to 10 μm or less. A tamper-proof label for thermal paper, which is characterized by being dispersed. 3. A label in which a base material, a release layer and an adhesive layer are laminated in this order, and a developer which is made into fine particles of 10 μm or less is provided between the peeling layer and the adhesive layer. A label for preventing fraud of thermal paper, comprising a coloring layer in which a coloring agent made of a leuco dye is dispersed. 4. A label in which a base material, a peeling layer and an adhesive layer are laminated in this order, and a photochromic material which develops ultraviolet light or infrared light is dispersed in the peeling layer or the adhesive layer. A tamper-proof label made of thermal paper. 5. A label in which a base material, a release layer, and an adhesive layer are laminated in this order, and a photochromic material that develops color with ultraviolet light or infrared light is provided between the peeling layer and the adhesive layer. A label for preventing fraud of thermal paper, which is provided with a coloring layer in which is dispersed.