JP2008146558A - Ic tag and method for manufacturing ic tag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an IC tag enabling to check under which temperature and humidity environment the IC tag has been used. <P>SOLUTION: This IC tag 1 is provided with an inlet layer 3, and a double-sided tape 5 is formed on one face of the inlet layer 3. An upper paper 7 is formed on the other face of the inlet layer 3. The upper payer 7 has temperature discoloration inks 17a and 17b as temperature discoloration parts and a humidity history display part 41 as a humidity discoloration part formed thereon. The temperature discoloration inks 17a and 17b are inks which irreversibly becomes discolored when the IC memory and/or antennas 23a and 23b in the inlet layer 3 reach temperature beyond an operable temperature range. The humidity history display part 41 is a section which irreversibly becomes discolored when the IC memory and/or the antenna reaches humidity beyond an operable humidity range. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an IC tag and an IC tag manufacturing method.

Conventionally, a tag (tag) describing product information is often attached to a product for distribution management of the product or the display of product information.
In this case, if the information is written in characters, it is difficult to read and manage the information using a computer or the like. Therefore, the information is written using a recognition means such as a barcode, and the barcode is read by a reader using infrared light or the like. By reading this, the information described in the barcode is recognized.

On the other hand, the barcode has a limitation in the amount of information that can be described, and the reading device can read only one barcode at a time.
Therefore, in recent years, a new recognition means called an IC tag is used as a tag, in which information is written in an IC memory and wirelessly communicates with a reader using an antenna connected to the IC memory.

Since an IC tag uses an IC memory, there is an advantage that the amount of information that can be written (stored) is much larger than that of a barcode.
Further, since the IC tag communicates wirelessly, the reading device can communicate with a plurality of IC tags at a time, and there is an advantage that the time required for reading can be greatly shortened as compared with the barcode. .
The following are known as such IC tags (Patent Document 1).
JP 2002-102310 A

Here, since the IC tag is an electronic component, performance may deteriorate or break down.
The cause of deterioration or failure may be the initial failure of the IC memory or antenna, or the use of an IC tag outside the temperature or humidity range where the IC memory or antenna can operate, such as high temperature, low temperature, It may be caused by use in a high humidity environment.

  However, even when an IC tag breaks down in the past, it is difficult to investigate under what temperature and humidity environment the IC tag was used, and it is difficult to identify the cause of deterioration or failure. There was a problem.

  The present invention has been made in view of such problems, and an object thereof is to provide an IC tag capable of examining under what temperature and humidity environment it is used.

  In order to achieve the above-described object, the first invention is an IC tag having at least an IC memory and an antenna connected to the IC memory, and irreversibly discolors when the temperature is out of a certain range. The IC tag is characterized in that a temperature discoloration portion is provided.

The temperature discoloration part is made of temperature discoloration ink that changes irreversibly with temperature.
The IC memory and the antenna are provided in an inlet layer, a double-sided tape provided with an adhesive layer on both sides is provided on one side of the inlet layer, and the inlet layer is provided on the other side of the inlet layer. An upper paper to be protected may be provided, and the temperature discoloration portion may be provided on the upper paper.

  The second invention is an IC tag having at least an IC memory and an antenna connected to the IC memory, and is provided with a humidity discoloration portion that irreversibly discolors when the humidity is outside a certain range. This is an IC tag characterized by the above.

  The IC memory and the antenna are provided in an inlet layer, a double-sided tape provided with an adhesive layer on both sides is provided on one side of the inlet layer, and the inlet layer is provided on the other side of the inlet layer. An upper paper to be protected may be provided, and the humidity discoloration portion may be provided on the upper paper.

The humidity discoloration part is adjacent to the coloring part, a coloring part comprising a water-soluble dye and a water-insoluble concealing pigment that conceals the color of the water-soluble pigment, and a humidity history display ink. And a dyeing part capable of absorbing the water-soluble dye, and when the water-soluble dye comes into contact with water, the water-soluble dye is separated from the concealing pigment and eluted into the water, and the dyeing The humidity discoloration part may be irreversibly discolored by dyeing the part.
The dyeing portion may be an upper sheet provided on an inlet layer provided with the IC memory and the antenna.

  The humidity discoloration portion may be composed of a humidity discoloration ink that changes irreversibly with humidity.

  3rd invention provides the process (a) which provides the inlet layer which has IC memory and the antenna connected to the said IC memory in one side of the double-sided tape in which the adhesion layer was provided in both surfaces, The said inlet An IC comprising: a step (b) of providing an upper paper on the layer; and a step (c) of printing a temperature discoloration portion irreversibly discoloring at a temperature outside a certain range on the upper paper. It is a manufacturing method of a tag.

  4th invention has the process (a) which provides the inlet layer which has IC memory and the antenna connected to the said IC memory in one side of the double-sided tape in which the adhesion layer was provided in both surfaces, The said inlet An IC tag comprising: a step (b) of providing an upper paper on the layer; and a step (c) of providing a humidity discoloration portion irreversibly discoloring when the humidity is outside a certain range on the upper paper. It is a manufacturing method.

In the first invention, the IC tag includes a temperature discoloration section that irreversibly discolors when the temperature is outside a certain range (outside the temperature range in which the IC memory and / or the antenna can operate).
In the second invention, the IC tag includes a humidity discoloration section that irreversibly discolors when the humidity falls outside a certain range (outside the humidity range in which the IC memory and / or the antenna can operate).

  According to the first invention, since the IC tag is provided with the temperature discoloration portion that changes irreversibly when the temperature is outside a certain range, it is examined under what temperature environment the IC tag was used. This makes it easy to identify the cause of deterioration and failure.

  According to the second invention, since the IC tag includes a humidity discoloration portion that changes irreversibly when the humidity is outside a certain range, under what humidity environment the IC tag was used. This makes it easy to identify the cause of deterioration and failure.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings. FIG. 1 is a cross-sectional view showing the layer structure of an IC tag 1 according to the first embodiment, and FIGS. 2 and 4 to 6 are views in the direction of arrow A in FIG. 1, and FIG. 3 is an inlet in FIG. FIG. 4 is a view in the direction of arrow A of layer 3.

As shown in FIGS. 1 and 2, the IC tag 1 has an inlet layer 3, and a double-sided tape 5 is provided on one surface of the inlet layer 3.
An upper paper 7 is provided on the other surface of the inlet layer 3.
The upper paper 7 is provided with temperature discoloration inks 17a and 17b as temperature discoloration portions and a humidity history display portion 41 as a humidity discoloration portion.

The inlet layer 3 is a member that stores information on a product to which the IC tag 1 is attached and communicates information with the outside.
As shown in FIG. 3, the inlet layer 3 has a base material 21, and antennas 23 a and 23 b are provided on the base material 21.

  Connection terminals 25a and 25b are connected to one end of the antennas 23a and 23b, and an IC chip 29 incorporating an IC memory is connected to the connection terminals 25a and 25b.

  Connection terminals 31 a and 31 b are provided at the other ends of the antennas 23 a and 23 b, and the connection terminal 31 a and the connection terminal 31 b are connected to each other by a conducting member 33.

  The IC chip 29 is a part for storing information of a product to which the IC tag 1 is attached, and the information is stored in a built-in IC memory.

The antennas 23a and 23b are members used for communication between the IC memory and the outside.
The IC memory and the antennas 23a and 23b can receive a calling radio wave having a constant frequency from a reading device (not shown) by forming a resonance circuit.

The IC memory and the antennas 23a and 23b can return information in the IC memory in response to the reading device.
In this way, the IC memory and the antennas 23a and 23b communicate with the reading device.

In addition, it is preferable that the material which comprises the base material 21 of the inlet layer 3 is an inexpensive material excellent in durability and heat resistance.
An example of such a material is PET (Polyethylene terephthalate).

Further, examples of the material constituting the antennas 23a and 23b of the inlet layer 3 include metals such as aluminum.
And the shape of an antenna is formed by laminating | stacking said metal on metal substrate 21 as metal foil, and performing the photo-etching and the etching after resist printing.

In addition, you may use conductive ink as a material which comprises the antennas 23a and 23b.
Examples of the conductive ink include offset ink, gravure ink, and silk screen printing ink using carbon pigment, graphite, silver powder, aluminum powder, or a mixture thereof.

  When conductive ink is used as the material constituting the antennas 23 a and 23 b, the antennas 23 a and 23 b are formed by printing the conductive ink on the base material 21.

  In the first embodiment, the IC chip 29 and the antennas 23a and 23b are configured as separate members. However, a so-called coil-on-chip type IC chip in which an antenna coil is provided in the IC chip may be used. Good.

  On the other hand, the double-sided tape 5 is a member for protecting the inlet layer 3 and attaching the IC tag 1 to a product, and has a base film layer 9 and adhesive layers 11 a and 11 b provided on both sides of the base film layer 9. is doing.

  And the double-sided tape 5 is provided in the inlet layer 3 by affixing the adhesion layer 11b on one side of the inlet layer 3.

  Further, the IC tag 1 is attached to the product by attaching the surface of the adhesive layer 11a to the surface of the product.

In addition, as a material which comprises the base film layer 9 of the double-sided tape 5, the thing similar to the material which comprises the base material 21 is mentioned. However, a thin one is required.
Moreover, as a material which comprises the adhesion layers 11a and 11b of the double-sided tape 5, an acrylic emulsion is mentioned, for example.

  The upper paper 7 is a member for protecting the inlet layer 3 and has a surface layer 13 and an adhesive layer 15 provided on one surface of the surface layer 13.

  And the upper paper 7 is provided in the inlet layer 3 by sticking the adhesion layer 15 on the other surface of the inlet layer 3.

Examples of the material constituting the surface layer 13 include the same materials as those constituting the substrate 21.
Moreover, as a material which comprises the adhesion layer 15, an acrylic emulsion is mentioned, for example.

The temperature-changing inks 17a and 17b are inks that change irreversibly when the temperature is outside a certain range, specifically, when the temperature is outside the temperature range in which the IC memory (in the IC chip 29) and / or the antennas 23a and 23b can operate. It is.
That is, the temperature discoloration inks 17a and 17b are inks that irreversibly discolor when the temperature is outside the temperature range in which the IC tag 1 can operate.

  The temperature discoloration ink 17a is irreversibly discolored at a temperature equal to or higher than the upper limit temperature at which the IC memory and / or the antennas 23a and 23b can operate, and the temperature discoloration ink 17b is irreversibly at a temperature equal to or lower than the lower limit temperature. It is an ink that changes color.

  When the IC tag 1 is placed in an environment within a temperature range in which the IC memory and / or the antennas 23a and 23b can operate, the temperature-changing inks 17a and 17b do not change color as shown in FIG.

  On the other hand, when the IC tag 1 is placed in an environment that is equal to or higher than the upper limit temperature at which the IC memory and / or the antennas 23a and 23b can operate, the temperature-changing ink 17a changes irreversibly as shown in FIG.

  Further, when the IC tag 1 is placed in an environment below the lower limit temperature at which the IC memory and / or the antennas 23a and 23b can operate, as shown in FIG. 5, the temperature-changing ink 17b changes irreversibly.

  Here, since the discoloration is irreversible, even when the IC tag 1 is subsequently placed in an environment within the temperature range in which the IC memory and / or the antennas 23a and 23b can operate, the color of the temperature discoloration inks 17a and 17b. Will not return.

  Therefore, whether or not the IC tag 1 is placed in an environment outside the temperature range in which the IC memory and / or the antennas 23a and 23b can operate is visually determined by checking whether the temperature-changing inks 17a and 17b are discolored. Can be recognized.

  Here, the upper limit temperature is, for example, 90 degrees Celsius, and the lower limit temperature is, for example, minus 40 degrees Celsius.

  The material constituting the temperature-changing inks 17a and 17b is not particularly limited as long as it is an ink that changes irreversibly with temperature, and examples thereof include leuco dye-encapsulated ink.

  A leuco dye-encapsulated ink is an ink having microcapsules encapsulating a leuco dye, which is a dye that changes color with temperature.

A leuco dye is a dye containing a compound that changes color by an oxidation-reduction reaction, and changes color by an oxidation-reduction reaction with a developer.
Therefore, any material that changes irreversibly can be used as the material of the temperature-changing inks 17a and 17b.

However, the leuco dye or developer is not a simple substance, and a color change reaction occurs when the dye, developer, and solvent are combined. If left in the air, it may react with oxygen in the air. Therefore, these effects are eliminated by encapsulating in microcapsules.
Further, in order to obtain dispersibility for forming an ink, it is microencapsulated.

  In the first embodiment, known leuco dyes can be used, such as diphenylmethane phthalides, fluorans, diphenylmethane azaphthalides, indolyl phthalides, phenyl indolyl phthalides, phenyl indolyl. Examples thereof include azaphthalides, styrylquinolines, pyridines, quinazolines, bisquinazolines and the like.

Moreover, a well-known thing can be used also as a color developer, For example, a phenolic compound is mentioned.
Furthermore, well-known materials can be used for the microcapsules, and examples thereof include resins.

  The humidity history display unit 41 is a portion that irreversibly discolors when the humidity is outside a certain range, specifically, when the humidity is outside the humidity range in which the IC memory (in the IC chip 29) and / or the antenna can operate.

As shown in FIGS. 1 and 2, the humidity history display unit 41 includes a dyeing unit 45, and the dyeing unit 45 is provided with humidity history display ink 43 as a coloring unit.
The dyeing part 45 is a part dyed with a water-soluble dye 51 described later, and is made of a material having water absorption. An example of such a material is paper.

The humidity history display ink 43 is an ink containing the water-soluble dye 51 and a water-insoluble masking pigment.
As will be described later, the water-soluble dye 51 is a dye for dyeing the dyed portion 45, and one that is dispersed in ink can be used. Examples of such dyes include those containing food colorings.

The concealment pigment is a pigment that conceals the color development of the water-soluble dye 51, and known inorganic pigments and organic pigments can be used.
Among these, from the viewpoint of concealability, a black color such as carbon black or a color close thereto is preferable.
That is, in the humidity history display ink 43, the color of the masking pigment masks the color of the water-soluble dye 51, and only the color of the masking pigment can be visually recognized.

When the IC tag 1 is placed in an environment within the humidity range in which the IC memory and / or the antennas 23a and 23b can operate, the water-soluble dye 51 is dispersed in the humidity history display ink 43 and is used for concealment. Hidden by pigment.
Therefore, as shown in FIG. 2, the color that can be visually recognized as the color of the humidity history display ink 43 is only the color of the masking pigment.

  On the other hand, when the IC tag 1 is placed in an environment outside the humidity range in which the IC memory and / or the antennas 23a and 23b can operate, for example, when the IC tag 1 is placed in an environment where condensation occurs, humidity history display is performed. Moisture in the air adheres to the ink 43 for use.

Then, since the water-soluble dye 51 is water-soluble, the water-soluble dye 51 is separated from the humidity history display ink 43 and eluted into the attached water.
Then, the water-soluble dye 51 eluted in the attached water oozes out to the dyeing part 45 as shown in FIG.

That is, the humidity history display unit 41 changes color.
Since the masking pigment is insoluble in water, even if moisture in the air adheres, it does not separate from the humidity history display ink 43 and elute into the adhered water.

  That is, the humidity history display ink 43 in the humidity history display section 41 does not change the color of the ink itself, but stains (changes in color) the dyeing section 45 when the water-soluble dye 51 is separated by contact with moisture.

  Therefore, whether or not the IC tag 1 is placed in an environment outside the humidity range in which the IC memory and / or the antennas 23a and 23b can be operated by checking whether or not the humidity history display unit 41 (dyeing unit 45) is discolored. Can be visually recognized.

  As described above, since the IC tag 1 is provided with the temperature-changing inks 17a and 17b and the humidity history display unit 41, when the performance of the IC tag 1 deteriorates or fails, the temperature-changing inks 17a and 17b. The cause of the failure can be identified by checking the presence or absence of discoloration in the humidity history display unit 41.

  For example, in the IC tag 1 whose performance has deteriorated or failed, if the temperature-changing ink 17a, 17b or the humidity history display unit 41 has changed color, the cause of the deterioration or failure is the environment of temperature or humidity. It is assumed that

On the other hand, if the temperature-changing inks 17a and 17b or the humidity history display unit 41 are not discolored, it is determined that the cause of deterioration or failure is not in the environment of temperature or humidity, but in an initial failure or other environment. Can do.
Therefore, it is easier to identify the cause of the degradation or failure of the IC tag 1 than in the past.

Here, a manufacturing method of the IC tag 1 will be described.
7 to 9 are diagrams showing a method for manufacturing the IC tag 1.

First, a double-sided tape 5 as shown in FIG.
The structure of the double-sided tape 5 is as described above, and has the base film layer 9 and the adhesive layers 11a and 11b provided on both surfaces of the base film layer 9, but the adhesive layers 11a and 11b are separated from each other. Separators 35a and 35b, which are pattern papers, are provided.

  Next, as shown in FIG.7 (b), the separator 35b is peeled from the adhesion layer 11b, and the inlet layer 3 is provided in the adhesion layer 11b.

Next, as shown in FIG.7 (c), the separator 35a is peeled from the adhesion layer 11a, and the separator 37 is provided in the adhesion layer 11a.
The separator 37 is a release paper similar to the separator 35a.

However, the separator 37 is provided extending in the longitudinal direction, and a plurality of IC tags can be provided as will be described later.
The separator 35a may be left without providing the separator 37.

Next, as shown in FIG. 8A, the upper paper 7 is provided on the inlet layer 3.
Finally, as shown in FIG. 8B, temperature discoloration inks 17 a and 17 b are provided on the upper paper 7 by printing, and a humidity history display portion 41 is pasted on the upper paper 7, whereby an IC is formed on the separator 37. A tag 1 is provided.

  The humidity history display ink 43 of the humidity history display unit 41 is provided in the dyeing unit 45 by printing.

  The IC tag 1 is manufactured through the above steps.

Since the separator 37 is provided extending in the longitudinal direction, a plurality of IC tags 1 can be provided in the longitudinal direction as shown in FIG.
Further, by winding the separator 37 in a roll shape in the state shown in FIG. 9, the separator 37 provided with the plurality of IC tags 1 can be stored and transported in a single roll shape.

  When the IC tag 1 is attached to the product, the IC tag 1 is peeled off from the separator 37, and the adhesive layer 11a is attached to the surface of the product.

  Thus, according to the first embodiment, the temperature-changing inks 17a and 17b that irreversibly discolor when the IC tag 1 reaches a temperature outside the temperature range in which the IC memory and / or the antennas 23a and 23b can operate. have.

  Further, the IC tag 1 has a humidity history display section 41 that irreversibly discolors when the humidity is outside the humidity range in which the IC memory and / or the antennas 23a and 23b can operate.

  Therefore, by checking whether the color changing inks 17a and 17b and the humidity history display section 41 are discolored, it is possible to check the temperature and humidity environment in which the IC tag 1 was used, and the deterioration or failure is caused. The cause of the problem can be easily identified.

Next, a second embodiment will be described.
FIG. 10 is a cross-sectional view showing the layer structure of the IC tag 1a according to the second embodiment, and FIG. 11 is a view taken in the direction of arrow A2 in FIG.

  Note that, in the second embodiment, elements having the same functions as those of the IC tag 1 according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  The IC tag 1a according to the second embodiment is obtained by using the surface layer 13 of the upper paper 7 as a staining portion in the IC tag 1 according to the first embodiment.

  As shown in FIGS. 10 and 11, humidity history display ink 43 is provided on the surface layer 13 of the upper paper 7 of the IC tag 1 a.

  When the IC tag 1b is placed in an environment within the humidity range in which the IC memory and / or the antennas 23a and 23b can operate, as shown in FIG. Since it is dispersed in 43 and is concealed by the concealing pigment, the color cannot be seen.

  On the other hand, when the IC tag 1a is placed in an environment outside the humidity range in which the IC memory and / or the antennas 23a and 23b can operate, for example, when the IC tag is placed in an environment where condensation occurs, the humidity history is displayed. Moisture in the air adheres to the ink 43.

  Then, the water-soluble dye 51 is separated from the humidity history display ink 43 and eluted into the adhering water, and oozes out into the surface layer 13 as shown in FIG.

That is, in the second embodiment, the surface layer 13 of the upper paper 7 is used as a dyeing portion, and the surface layer 13 and the humidity history display ink 43 constitute a humidity discoloration portion.
The humidity history display ink 43 is provided on the surface layer 13 of the upper paper 7 by printing.

  Thus, according to the second embodiment, the temperature change color inks 17a and 17b that irreversibly discolor when the IC tag 1a reaches a temperature outside the temperature range in which the IC memory and / or the antennas 23a and 23b can operate are provided. Have.

  Further, the IC tag 1a has the humidity history display ink 43, and when the humidity becomes outside the humidity range in which the IC memory and / or the antennas 23a and 23b can operate, the water-soluble dye of the humidity history display ink 43 is used. 51 stains the surface layer 13.

  Accordingly, the same effects as those of the first embodiment are obtained.

  Further, according to the second embodiment, there is no need to separately provide a dyeing portion, and thus the structure is simple compared to the first embodiment.

Next, a third embodiment will be described.
FIG. 12 is a cross-sectional view showing the layer structure of the IC tag 1b according to the third embodiment, and FIG. 13 is a view taken in the direction of the arrow A3 in FIG.

  In the third embodiment, elements having the same functions as those of the IC tag 1 according to the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  The IC tag 1b according to the third embodiment is the same as the IC tag 1 according to the first embodiment except that a humidity discoloration ink 17c that changes irreversibly with humidity is provided as a humidity discoloration part.

As shown in FIGS. 12 and 13, the IC tag 1 b has humidity discoloration ink 17 c on the surface layer 13 of the upper paper 7.
The humidity discoloration ink 17c is an ink that changes irreversibly with humidity.

  When the IC tag 1b is placed in an environment within the humidity range in which the IC memory and / or the antennas 23a and 23b can operate, as shown in FIG. 13A, the humidity discoloration ink 17c does not change color.

  On the other hand, when the IC tag 1b is placed in an environment where the IC memory and / or the antennas 23a and 23b can operate, the humidity discoloration ink 17c is irreversibly discolored as shown in FIG. To do.

  Accordingly, whether or not the IC tag 1b is placed in an environment within a humidity range in which the IC memory and / or the antennas 23a and 23b can operate is visually recognized by checking whether or not the humidity discoloration ink 17c is discolored. be able to.

  The material constituting the humidity discoloration ink 17c is not particularly limited as long as the ink is irreversibly discolored by humidity.

  As described above, according to the third embodiment, the temperature change inks 17a and 17b that irreversibly discolor when the IC tag 1b reaches a temperature outside the temperature range in which the IC memory and / or the antennas 23a and 23b can operate. Have.

  Further, the IC tag 1b has humidity discoloration ink 17c that irreversibly discolors when the humidity is outside the humidity range in which the IC memory and / or the antennas 23a and 23b can operate.

  Accordingly, the same effects as those of the first embodiment are obtained.

  Further, according to the third embodiment, the humidity discoloration ink 17c changes its color itself, and the dye does not elute at the time of discoloration, so there is no fear of staining the surroundings of the ink.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

Sectional drawing which shows layer structure of IC tag 1 1. A direction arrow view of FIG. A direction arrow view of the inlet layer 3 of FIG. 1. A direction arrow view of FIG. 1. A direction arrow view of FIG. 1. A direction arrow view of FIG. The figure which shows the manufacturing method of IC tag 1 The figure which shows the manufacturing method of IC tag 1 The figure which shows the manufacturing method of IC tag 1 Sectional drawing which shows layer structure of IC tag 1a A2 direction arrow view of FIG. Sectional drawing which shows layer structure of IC tag 1b A3 direction arrow view of FIG.

Explanation of symbols

1. IC tag 1a ... IC tag 1b ... IC tag 3 ... Inlet layer 5 ... Double-sided tape 7 ... Upper paper 9 ... Base film layer 11a ... ... Adhesive layer 13 ... Surface layer 15 ... Adhesive layer 17a ... Temperature discoloration ink 21 ... ... Base material 23a ... Antenna 25a ... Connection terminal 29 ... ... IC chip 31a ... Connection terminal 33 ... ... Conductive member 35a …… Separator 37 ………… Separator 41 ……… Humidity history display portion 43 ………… Humidity history display ink 45 ………… Dyeing portion 51 ……… Water-soluble dye

Claims (10)

An IC tag having at least an IC memory and an antenna connected to the IC memory,
An IC tag, characterized in that a temperature discoloration part is provided which changes irreversibly when a temperature outside a certain range is reached.   2. The IC tag according to claim 1, wherein the temperature discoloration portion is made of a temperature discoloration ink that irreversibly discolors depending on temperature. The IC memory and the antenna are provided in an inlet layer,
On one side of the inlet layer, a double-sided tape provided with an adhesive layer on both sides is provided,
On the other surface of the inlet layer is provided an upper paper for protecting the inlet layer,
2. The IC tag according to claim 1, wherein the temperature discoloration portion is provided on the upper paper. An IC tag having at least an IC memory and an antenna connected to the IC memory,
An IC tag, characterized in that a humidity discoloration portion is provided which changes irreversibly when humidity is outside a certain range. The IC memory and the antenna are provided in an inlet layer,
On one side of the inlet layer, a double-sided tape provided with an adhesive layer on both sides is provided,
On the other surface of the inlet layer is provided an upper paper for protecting the inlet layer,
The IC tag according to claim 4, wherein the humidity discoloration portion is provided on the upper paper. The humidity discoloration part is
A colored portion composed of a humidity history display ink containing a water-soluble dye and a water-insoluble hiding pigment for hiding the color of the water-soluble pigment;
A dyed portion provided adjacent to the colored portion and capable of absorbing the water-soluble dye;
Have
When the water-soluble dye comes into contact with water, the water-soluble dye is separated from the concealing pigment and eluted into the water, and the humidity discoloration part is irreversibly discolored by dyeing the dyed part. 5. The IC tag according to claim 4, wherein   The IC tag according to claim 6, wherein the dyeing portion is an upper sheet provided on an inlet layer provided with the IC memory and the antenna.   5. The IC tag according to claim 4, wherein the humidity discoloration portion is made of a humidity discoloration ink that changes irreversibly with humidity. A step (a) of providing an inlet layer having an IC memory and an antenna connected to the IC memory on one surface of a double-sided tape provided with an adhesive layer on both sides;
Providing an upper paper on the inlet layer (b);
A step (c) of printing a temperature discoloration portion that irreversibly discolors at a temperature outside a certain range on the upper paper;
The manufacturing method of the IC tag characterized by having. A step (a) of providing an inlet layer having an IC memory and an antenna connected to the IC memory on one surface of a double-sided tape provided with an adhesive layer on both sides;
Providing an upper paper on the inlet layer (b);
A step (c) of providing a humidity discoloration portion that irreversibly discolors when the humidity is outside a certain range on the upper paper;
The manufacturing method of the IC tag characterized by having.

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