JP2007156668A - Non-contact ic tag label and non-contact ic tag sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-contact IC tag label or the like capable of relaxing radio wave interference even when sticking a non-contact IC tag label onto a slip, a price tag, a luggage tag or the like, placing it on a metallic body, and using it. <P>SOLUTION: This non-contact IC tag label 1a sequentially has an adhesive layer 6 and a release paper 8 for performing the sticking onto a stuck body on a face opposite to an antenna coil 2 of an inlet base 11. In the non-contact IC tag label, a magnetic material sheet 10 having a thickness of 50-300 μm, and having 20 or above initial magnetic permeability in 13.56 MHz frequency is layered on an antenna coil 2 face of the inlet base 11, and further, a magnetic material sheet 10 face has a surface sheet 4. A non-contact IC tag can have a form not having the adhesive layer. In that case, it is set as a non-contact IC tag sheet having a display sheet holding visible information. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a non-contact IC tag label and a non-contact IC tag sheet. Specifically, it is a non-contact IC tag label or sheet having a structure that suppresses communication obstruction due to metal, but it is not directly attached to a metal product, etc., and it is used for slips, price tags, packing tags, etc. that are non-metallic materials. It is a label related to an application that is attached or attached to a metal body and used by being fixed.
The non-contact IC tag label or the non-contact IC tag sheet of the present invention (hereinafter referred to as “non-contact IC tag label”) is also used as a normal non-contact IC tag. It has the feature which suppresses communication obstruction by using it for an object or a container.
Therefore, the technical field of the present invention relates to the manufacture and use of contactless IC tag labels, etc., and the main fields of use are the fields of transportation, distribution, sales management, factory process management, product delivery and baggage handling. Possible uses include tags, labels, sheets, and delivery slips.

Non-contact IC tags record and hold information and can exchange information by communicating with external devices in a non-contact manner, so they are widely used as a recognition medium in transportation and logistics, or for various purposes such as product quality control and inventory management. It has come to be.
However, when a non-contact IC tag is used for a conductive member such as an object made of a metal material or a metal container, a vortex is generated in the metal of the object behind by an AC magnetic field generated by electromagnetic waves for transmitting and receiving the non-contact IC tag. Electric current is generated. This eddy current often generates a magnetic flux in a direction that cancels the magnetic flux for transmission and reception, which attenuates the magnetic flux for transmission and reception and often makes communication difficult.
Therefore, when a non-contact IC tag is attached to a member made of a conductive material such as metal, a magnetically permeable magnetic sheet is disposed between the non-contact IC tag and the conductive member, and a transmission / reception magnetic flux is passed therethrough. There is known a method for suppressing generation of eddy current caused by magnetic flux entering a metal. The non-contact IC tag label of the present invention also utilizes this principle.

For this purpose, various non-contact IC tags corresponding to metals have been developed and proposed.
Patent Document 1 relates to an “information storage device”, but proposes to provide a magnetic absorbing plate made of a highly permeable material between a metal material which is a surface to which an object is attached and an antenna substrate.
Patent Document 2 proposes a structure in which a magnetic core member is housed inside an antenna coil in an “ID tag”. Patent Document 3 relates to a “non-contact IC tag label” attached to a conductive layer such as a metal, and describes that a magnetic sheet is used for the insulating layer. Patent Document 4 is a “non-contact IC tag label” according to the prior application of the present application, and proposes to insert a magnetic material coated sheet between an adhesive layer to be adhered to an adherend and an inlet base. Yes.

However, even a non-contact IC tag label manufactured for the purpose of use in a metal body and using a magnetic material may not exhibit its effect depending on the method of use.
FIG. 8 is a diagram for explaining such an example. A conventional non-contact IC tag label 1j corresponding to metal has a magnetic material sheet 10 on the lower surface of an inlet base 11 having an antenna coil 2 and an IC chip connected thereto, and an adhesive layer 6 on the lower surface of the magnetic material sheet 10. is doing.
Such a non-contact IC tag label 1j is designed to exhibit a predetermined effect when it is directly attached to a product or product that is a metal body by the adhesive layer 6 originally.

  However, the non-contact IC tag label 1j is not directly attached to the metal product 20, but is attached to the back side of a sheet of another object to be attached, such as a slip, a price tag, a tag, etc. as shown in FIG. In many cases, the slip, price tag, tag, etc. 15 sheet is simply placed or suspended on the surface of the metal product 20. On the contrary, there are aspects that are considered preferable because the adhesive does not adhere to the product or the product, and the non-contact IC tag is not conspicuous on the back of the sheet. In the case of this method of use, when the voucher, price tag, tag, etc. 15 are directed to the surface and read from the surface side by the reader / writer 30, the magnetic material sheet 10 is positioned between the reader / writer 30 and the antenna coil 2. Therefore, the effect of the original magnetic material sheet 10 is not exhibited and the magnetic flux is absorbed on the front surface of the antenna coil 2, which conversely hinders communication.

  Therefore, in this application method, the inlet base 11 is located between the magnetic material sheet 10 and the pressure-sensitive adhesive layer 6 even in such a usage method, and the generation of eddy currents caused by magnetic flux entering the metal body as a product or product is suppressed. The structure of the non-contact IC tag label is examined. Such prior art of labels and sheets cannot be particularly detected.

JP 2000-113142 A JP 2001-56847 A JP 2003-85501 A Japanese Patent Application No. 2005-281263

When a non-contact IC tag label is directly attached to a metal body, the purpose of suppressing communication inhibition can be achieved by the layer structure of the conventional non-contact IC tag label for metal, but the non-contact IC tag label is a product metal. When sticking to the back of slips, price tags, packing tags, etc. without sticking to the body, and simply placing it on the metal product surface, the magnetic material sheet is attached to the antenna coil to the reader / writer. Will be the cause of communication hindrance.
Therefore, the present invention has completed the present invention by studying the form of the layer configuration of the non-contact IC tag label and the non-contact IC tag sheet that does not cause the communication hindrance by the metal even in such a usage method. It's a thing.

  The first of the gist of the present invention for solving the above problems is that an IC chip with a storage function capable of reading information in a non-contact manner and an antenna coil for transmitting and receiving electromagnetic waves are electrically connected on the inlet base. In a non-contact IC tag label having an adhesive layer for adhering to an adherend and an adhesive protective release paper on the side opposite to the antenna coil in order, the inlet base antenna coil surface has an initial frequency at 13.56 MHz. A non-contact IC tag label characterized in that a magnetic material sheet having a magnetic permeability of 20 or more, a thickness of 50 μm or more and 300 μm or less is laminated, and a surface sheet is further provided on the surface of the magnetic material sheet. ,It is in.

  The second of the gist of the present invention for solving the above problems is that an IC chip with a storage function capable of reading information in a non-contact manner and an antenna coil for transmitting and receiving electromagnetic waves are electrically connected on the inlet base, and the inlet base In a non-contact IC tag sheet having a display sheet for holding visible information on the side opposite to the antenna coil, the initial permeability at a frequency of 13.56 MHz is 20 or more on the inlet-based antenna coil surface, and the thickness of the sheet is A non-contact IC tag sheet characterized in that a magnetic material sheet of 50 μm or more and 300 μm or less is laminated, and further has a surface sheet on the surface of the magnetic material sheet.

  In the non-contact IC tag label or the non-contact IC tag sheet, when the non-contact IC tag label or the like is used on a non-metallic surface, the minimum operating magnetic field strength at a frequency of 13.56 MHz is 0.5 A / m or more and 3 If it is set to 0.0 A / m or less, the communication characteristics are excellent even when used on a non-metallic surface. In addition, when used on a metal surface, the minimum operating magnetic field strength at a frequency of 13.56 MHz is 1.0 A / m or more and 3.5 A / m or less so that contactless communication on the metal surface is possible. The characteristics are also sufficient.

  In addition, the magnetic material sheet is coated with a coating layer of a material in which a soft magnetic material having a thickness of 10 μm or more and 200 μm or less is mixed with a plastic film having a thickness of 10 μm or more and 50 μm or less. An engineering sheet may be used. In that case, the magnetic material sheet can be made thinner, and a non-contact IC tag label and a non-contact IC tag sheet which are flexible as a whole can be obtained.

If a single-layer plastic film is provided between the magnetic material sheet and the inlet base, an intermediate processed non-contact IC tag label or non-contact IC tag sheet may be changed to a metal-compatible type. it can. In addition, it is preferable that the constituent layers of the non-contact IC tag label are in close contact with an adhesive or a pressure-sensitive adhesive.
In the case of a non-contact IC tag sheet, the display content can be rewritten as needed depending on the status of the product or the product by further providing a thermal rewriting display portion on the surface of the display sheet.

In the non-contact IC tag label of the present invention, since the inlet base is located between the adhesive layer and the magnetic material sheet to be adhered to the adherend, the non-contact IC tag label is affixed to the back surface of slips, price tags, and tags. Even when worn and attached to or placed on a product made of a metal body, the influence of communication obstruction due to the demagnetizing field caused by the metal can be reduced.
In the non-contact IC tag sheet of the present invention, since the inlet base is located between the display sheet and the magnetic material sheet, the non-contact IC tag label is attached to or placed on a product or the like made of a metal body with the display sheet in front. Even if they are used in the same manner, it is possible to reduce the influence of communication obstruction due to the demagnetizing field caused by the metal.

Since the non-contact IC tag label and the non-contact IC tag sheet of the present invention use magnetic material sheets having a thickness of 50 μm or more and 300 μm or less, they have flexibility and are sufficiently used for curved surfaces and uneven surfaces. Applicable.
When the non-contact IC tag sheet further has a heat-sensitive rewrite display portion, the display content can be rewritten as needed according to the status of the product or the product.

The present invention relates to a label-type non-contact IC tag having an adhesive layer for attaching an article and a sheet-type non-contact IC tag having no pressure-sensitive adhesive layer, and will be described below with reference to the drawings.
FIG. 1 is a schematic plan perspective view showing an example of the non-contact IC tag label of the present invention, FIG. 2 is a diagram showing a schematic cross-sectional structure of the non-contact IC tag label, and FIG. 3 is an outline of another example of the non-contact IC tag label. FIG. 4 is a schematic plan view showing an example of the non-contact IC tag sheet of the present invention, FIG. 5 is a diagram showing a schematic cross-sectional structure of the non-contact IC tag sheet, and FIG. 6 is a non-contact diagram. FIG. 7 is a diagram illustrating an example of use of an IC tag label or an IC tag sheet, and FIG. 7 is a diagram illustrating an influence of a metal body on a non-contact IC tag.

FIG. 1 is a schematic plan perspective view showing an example of a non-contact IC tag label of the present invention.
As an example, the non-contact IC tag label 1a has a planar antenna coil 2 formed on an inlet base 11 as shown in FIG. 1, and IC chips 3 that are semiconductor integrated circuits are mounted on both ends 2a and 2b of the antenna coil 2. . Since the mounting is performed by an anisotropic conductive adhesive sheet or the like, electrical connection is ensured. The antenna coil 2 is designed to transmit and receive electromagnetic wave signals having a frequency of 13.56 MHz. The IC chip 3 is an integrated circuit having a processing function, a storage function, and an input / output function, and the storage unit can store information, and the processing function unit stores information in the storage unit, or the storage unit Information can be read from
The IC chip 3 stores information in a storage unit in response to a command represented by an electromagnetic wave signal received by the antenna coil 2, or reads information stored in the storage unit, and transmits a signal representing the information to the antenna coil. Give to 2.

The conducting member 7 is a member for guiding one end of the antenna coil 2 to the end portion 2a of the antenna coil through the lower surface of the inlet base 11 in order to prevent a short circuit of the coil. The above planar configuration is the same as that of a normal non-contact IC tag label, and there is no particular difference.
Note that the antenna coil 2 and the IC chip 3 are not actually visible because the front and back surfaces of the non-contact IC tag label and the non-contact IC tag sheet are covered with a magnetic material sheet, release paper, display sheet, or the like. Therefore, FIG. 1 shows a state seen through from the top sheet side.
The inlet base 11 is a film in which the antenna coil 2 is formed on the base film and the IC chip 3 is mounted as described above. Generally, the inlet base 11 may be simply referred to as “base film” or “antenna sheet”. is there.

FIG. 2 is a diagram showing a schematic cross-sectional structure of a non-contact IC tag label.
As shown in FIG. 2, a schematic cross-sectional structure of the non-contact IC tag label 1a of the present invention is obtained by laminating a magnetic material sheet 10 made of a highly permeable magnetic material on the surface of the antenna coil 2 of the inlet base 11, and further magnetic material sheet 10 A surface sheet 4 is laminated on the surface. On the side surface of the inlet base 11 opposite to the antenna coil 2, a pressure-sensitive adhesive layer 6 for attaching the non-contact IC tag label 1 a to an adherend and a release paper 8 are laminated. The magnetic material sheet 10 in the case of FIG. 2 has a form using a material in which a magnetically permeable material is dispersed in a polymer.
The magnetic material sheet 10 is not particularly limited to a material as long as it has an effect of suppressing the generation of a demagnetizing field by reducing the magnetic flux loop flowing in the metal body. When the non-contact IC tag label 1 a is used, the release paper 8 is removed and the adhesive layer 6 is attached to the adherend. Here, the adherend means a sheet such as a slip, a price tag, and a tag, and does not mean a product or a product itself that is a metal body.

The non-contact IC tag label 1a of the present invention is characterized in that the magnetic material sheet 10 is not disposed between the inlet base 11 and the pressure-sensitive adhesive layer 6 as in the conventional label, but is disposed between the inlet base 11 and the top sheet 4. There is in being. Usually, when a non-contact IC tag label is attached to a metal body, the label layer is configured so that the magnetic material sheet 10 is positioned between the antenna coil 2 and the metal body as a product. However, when doing so, when using non-contact IC tag labels attached to the back side of sheets such as slips, price tags, packing tags, etc. and simply placing them on products made of metal or placing them in holders, This creates an unreadable problem.
Therefore, the present invention is configured as described above so that the magnetic material sheet 10 can absorb the magnetic flux and exhibit the original effect even in such a usage method. The top sheet 4 is on the back side when the non-contact IC tag label 1a is placed on a metal product. Therefore, what may actually be said to be the surface may be a sheet such as a slip, price tag, or tag.

  The release paper 8 is a material having a releasable surface generally called a separate paper and is a material for protecting the pressure-sensitive adhesive layer 6. When sticking on the adherend, the release paper 8 is removed and sticking is performed with the adhesive layer 6. In many cases, the pressure-sensitive adhesive layer 6 is applied to the release paper 8 in advance, and this is adhered to the magnetic material sheet 10 of the IC tag label 1.

  The thickness of the magnetic material sheet 10 must be in the range of 50 μm to 300 μm. Preferably, the thickness is 50 μm to 200 μm, more preferably 50 μm to 150 μm. This range is used because flexibility as a label is obtained and processability is improved. As will be described later, when the magnetic material sheet 10 is a magnetic material coated sheet, the thickness is the same.

In the case of FIG. 2, the magnetic material sheet 10 is directly bonded to the inlet base 11 by the adhesive layer 9 b, but a single-layer plastic film may be provided between the magnetic material sheet 10 and the inlet base 11. It is. Claim 5 means such an embodiment.
In addition, although adhesive layers 9a and 9b are illustrated between the top sheet 4 and the inlet base 11 and between the inlet base 11 and the magnetic material sheet 10, the adhesive layers 9a and 9b may be used instead of the adhesive. Alternatively, it may be bonded with melted polyethylene or the like, and any bonding means may be used. The same applies to the following drawings.

FIG. 3 is a diagram showing a schematic cross-sectional structure of another example of a non-contact IC tag label.
As shown in FIG. 3, a schematic cross-sectional structure of another example of the non-contact IC tag label 1a includes a magnetic material sheet laminated on the surface of the antenna coil 2 of the inlet base 11 via a plastic film 5, and further on the surface of the magnetic material sheet. A top sheet 4 is laminated.
As the magnetic material sheet in FIG. 3, a magnetic material coated sheet 10 ′ obtained by coating a plastic sheet 10a with a permeable magnetic material is used. The thickness of the magnetic material coated sheet 10 ′ is in the range of 50 μm to 250 μm. Preferably, the thickness is 50 μm to 200 μm, more preferably 50 μm to 150 μm. If the total thickness of the magnetic material coating sheet 10 ′ including the base material sheet 10a and the coating layer 10b is less than 50 μm, the required coating thickness of the magnetic material cannot be obtained, and sufficient effects cannot be obtained. Moreover, when it exceeds 250 μm, the flexibility of the non-contact IC tag label 1 is lost.

  In the case of FIG. 3, the magnetic material coated sheet 10 ′ is bonded to the inlet base 11 with the adhesive layer 9 b through the single plastic film 5. Therefore, although it corresponds to the embodiment of claim 5, the plastic film 5 can be omitted. However, the form through the plastic film 5 can be commercialized as a form in which the intermediate processed non-contact IC tag label is changed to a metal-compatible type. The thickness of the plastic film 5 is preferably 10 μm or more and 50 μm or less from the viewpoint of flexibility and the like.

  The above shows a typical form of the non-contact IC tag label 1a, and various modifications can be arbitrarily adopted. For example, the top sheet 4 may be a thin coating layer or may be omitted. Further, the magnetic material sheet 10 may not be disposed on the entire lower surface of the inlet base 11, and may be partially provided on the lower surface of the antenna coil 2 as long as it has the effect of suppressing the generation of the demagnetizing field. Good.

FIG. 4 is a schematic plan view showing an example of the non-contact IC tag sheet of the present invention.
Unlike FIG. 1, it is the partially broken view seen from the display sheet 12 side. Also in the case of the non-contact IC tag sheet 1b of FIG. 4, the planar antenna coil 2 is formed on the inlet base 11, and the IC chip 3 is mounted on both ends 2a and 2b of the antenna coil 2. The contents and functions of the antenna coil 2 and the IC chip 3 are the same as those of the non-contact IC tag label 1a.

The non-contact IC tag sheet 1b has a display sheet 12, and visible information 13 is displayed on the display sheet 12. The visible information 13 is visually identifiable information such as a product name, brand name, price, display of a product such as a manufacturer, a picture, and the like, and does not take any kind.
The display sheet 12 may have a larger area than the base film 11, and the whole may be in the form of a price list or a delivery slip. In that case, the non-contact IC tag and the magnetic sheet 10 are attached to the back of the price list or delivery slip.
The display sheet 12 may have a thermal rewrite display unit 14 in addition to the visible information 13. This is because the display of products, prices, and the like can be changed as needed depending on the situation if the thermal rewriting display unit 14 is provided. Of course, when a price or the like is recorded on the IC chip 3, it is necessary to rewrite the display unit 14 at the same time.

FIG. 5 is a diagram showing a schematic cross-sectional structure of a non-contact IC tag sheet.
The schematic cross-sectional structure of the non-contact IC tag sheet 1b of the present invention is such that a magnetic material sheet 10 made of a highly permeable magnetic material is laminated on the antenna coil 2 surface of the inlet base 11 via a plastic film 5 as shown in FIG. Furthermore, the surface sheet 4 is laminated on the surface of the magnetic material sheet 10. The inlet base 11 has a display sheet 12 on the side opposite to the antenna coil 2, but does not have the adhesive layer 6 and the release paper 8. This is because the non-contact IC tag sheet 1b is not intended to be attached to an article or sheet for use.

  As in the case of the non-contact IC tag label, the magnetic material sheet 10 ′ may be used instead of the magnetic material sheet 10, and the magnetic material sheet 10 may not be laminated without using the plastic film 5. is there. Therefore, FIG. 5 shows only an example of a non-contact IC tag sheet. When such a non-contact IC tag sheet 1b is used, the visual information 13 on the display sheet 12 can be observed by making the magnetic material sheet 10 or the magnetic material coating sheet 10 'be on the metal body side which is a product or a product. Put it in a state and hang it on the metal surface.

FIG. 6 is a diagram illustrating an example of using a non-contact IC tag label or a non-contact IC tag sheet.
Since the non-contact IC tag label 1a is used by being attached to a sheet such as a slip, price tag, or tag, the appearance of the surface after the sticking becomes a slip, price tag, or tag itself. As shown in FIG. 6A, the non-contact IC tag label 1a after sticking can be placed in the transparent holder 21 and simply placed on the surface of the product or product 20 that is a metal body, or fixed with cellophane tape or the like. Alternatively, as shown in FIG. 6 (B), it may be fixed to a string 22 and attached to a product or product 20 that is a metal body.

Since the surface of the non-contact IC tag sheet 1b has the display sheet 12 and holds the visible information 13, the appearance of the surface is similarly a delivery slip, a delivery note, a price tag, and a tag itself.
In this case, an additional record item may be entered on the slip, price tag, tag, etc. 15 or recorded on the thermal rewrite display unit 14 and simply placed or hung on the surface of the product 20 which is a metal body. As shown in FIG. 6C, the rubber band 23 may be used to fix the product 20 as a metal body. Of course, the same usage method as in FIGS. 6A and 6B is also possible.

Here, the influence of the metal body on the non-contact IC tag will be described with reference to FIG.
In general, when the antenna coil of the non-contact IC tag receives a magnetic flux loop from the reader / writer, when there is no metal body in the vicinity or when it is attached to the non-metal body N, the antenna wire as shown in FIG. A magnetic flux loop R is generated around 2s. On the other hand, when the metal body K is near the antenna coil, an eddy current is generated in the metal body K as shown in FIG. 7B, and the demagnetizing field generated by the generated eddy current cancels the magnetic flux loop. (In FIG. 7B, the broken line indicates the disappeared magnetic flux loop H). As a result, only a slight magnetic flux loop R remains only in the portion around the antenna wire 2s, and the communication distance is remarkably shortened.

On the other hand, when the magnetic material (magnetic material sheet or magnetic material coating sheet) Z is inserted between the metal body K and the antenna wire 2s as shown in FIG. 7C, the magnetic material Z has high magnetic permeability. Therefore, since the magnetic flux is concentrated on the magnetic material Z and does not flow through the metal body K, a demagnetizing field is not generated and the magnetic flux is not lost, so that the magnetic flux loop R is formed and the communication distance is improved.
In the non-contact IC tag label 1a and the non-contact IC tag sheet 1b of the present invention, the magnetic material sheet 10 and the magnetic material coating sheet 10 'are located between the antenna coil 2 and the target metal body. The above effect is produced.

In each of the above embodiments, the initial magnetic permeability at a frequency of 13.56 MHz of the magnetic material sheet 10 or the magnetic material coating sheet 10 ′ must be 20 or more. This is to increase the magnetic flux density, and if it is less than 20, the effect of using the magnetic material sheet 10 or the like is insufficient.
The magnetic permeability μ is an evaluation index of soft magnetism and indicates the ease of magnetization with respect to a magnetic field applied from the outside.
The magnetic permeability is defined by magnetic permeability μ = magnetic flux density B / magnetic field strength H. The larger the magnetic permeability μ, the larger the magnetization with a smaller magnetic field, and the better the characteristics in general. The ratio of the vacuum permeability μo is referred to as the relative permeability, but simply speaking this value usually refers to this value.

Complex alternating permeability is used for AC magnetic fields. In an alternating magnetic field, the magnetic flux density cannot follow the change in the magnetic field, causing a phase delay of the magnetic field wave. Therefore, consider the real part μ ′ and imaginary part μ ″ of the complex relative permeability. The real part μ ′ is the same as the magnetic field. This relates to the magnetic flux density component of the phase, and the imaginary part μ ″ is an index including a phase delay and corresponds to a magnetic energy loss.
As the real part μ ′ increases, the complex relative permeability increases. In other words, a material having a high complex relative permeability has a high real part μ ′ in the complex relative permeability. When a material having a high real part μ ′ in the complex relative permeability exists in the magnetic field, the magnetic lines of force pass through the member in a concentrated manner.

  The initial magnetic permeability refers to the rising slope at the origin on the magnetization curve. In other words, it refers to a coefficient of how much magnetic flux density B is generated when a minute magnetic field H is applied in the absence of a magnetic field. The slope of the part that does not return on the magnetization curve beyond the range of the initial permeability is the reversible permeability, the slope of the straight line connecting each point on the curve and the origin is the total permeability, and the maximum value of the total permeability is the maximum permeability. This is called magnetic susceptibility. Thus, the magnetic permeability is not constant but varies with the magnetizing force.

  Generally, a magnetic material alone exhibits a high initial permeability, but a commercially available magnetic material (mixed product with a resin material or the like) used in combination with other materials has an initial permeability of about 20 to 60. However, usually, there are many commercially available magnetic material sheets in which a magnetic material is dispersed in a polymer or rubber material. In order to obtain an effective effect, these materials have a thickness of about 50 μm to 5 mm. It becomes. In many cases, the thickness exceeding 300 μm is not flexible and has a rough surface and poor workability. In addition, when the surface is rough, there is also a problem that the adhesion with the pressure-sensitive adhesive is lowered and the IC tag label is easily peeled off from the adherend. Therefore, the magnetic material sheet 10 is preferably in the thickness range of 50 μm to 300 μm. Preferably, it is in the range of 50 μm to 200 μm, more preferably in the range of 50 μm to 150 μm.

The non-contact IC tag label 1a and the non-contact IC tag sheet 1b of the present invention have a minimum operating magnetic field strength (H _min ) of 0.5 A / m at a communication frequency of 13.56 MHz when the object of use is a non-metallic surface. To 3.0 A / m. In general, in a proximity type IC card (VICC (Vicinity Integrated Circuit Card)) having an operating range of 70 cm or less, the minimum operating magnetic field strength (H _min ) is 150 mA / m rms, and the maximum operating magnetic field strength (H _max ) is 5. 0 A / m rms, and must operate continuously in the range of H _min and H _max (JISX6323-2, 6.2 operating magnetic field strength). This standard is considered to be applicable to non-contact IC tags as well.

According to the JIS standard, the above standard seems to be too loose. However, in general, when the magnetic material sheet 10 or the magnetic material coated sheet 10 ′ is used for a non-contact IC tag, the communication distance when used on a metal surface increases. However, the communication distance when used on a non-metallic surface is shorter than that of a general non-contact IC tag that does not use a magnetic material, and the minimum operating magnetic field strength (H _min ) becomes large.
Therefore, when the object of use is a metal surface, the minimum operating magnetic field strength (H _min ) of the non-contact IC tag label 1 is in the range of about 1.0 A / m to 3.5 A / m at the communication frequency of 13.56 MHz. If the object of use is a non-metallic surface, the metal should have a minimum operating magnetic field strength (H _min ) of about 0.5 A / m to 3.0 A / m at the same communication frequency. It has been recognized that stable communication can be secured on both the surface and the non-metal surface.

  The metal surface is a very thin metal layer. Since a metal layer deposited on a plastic substrate with a thickness of several nm also blocks non-contact communication, a metal surface with a thickness greater than this level is also a target. On the other hand, the non-metallic surface refers to the surface of a composition made of a material other than metal. Even if there is a metal on the lower surface of the non-metallic body, it is affected, so it is necessary that there is no metal within 10 mm from the surface of the antenna coil 2 when the non-contact IC tag label 1 is attached.

As described above, the neighborhood type IC card (VICC) has a minimum operating magnetic field strength (H _min ) of 150 mA / m rms and a maximum operating magnetic field strength (H _max ) of 5 A / m rms. The test method for the minimum operating magnetic field strength (H _min ) is described in JIS X 6305-7: 2001, 7. It is defined in the functional test of VICC. The minimum operating magnetic field strength (H _min ) defined in claim 2 of the present application is also based on the test method.
When an ordinary non-contact IC tag label that does not use a magnetic material sheet meets the requirement of a minimum operating magnetic field strength (H _min ) of 150 mA / m, it is a reader / writer with 1 W (watt) output, 300 mm to 400 mm, 4 to 8 W With an output reader / writer, communication is possible even at a distance of about 500 mm to 700 mm. On the other hand, the minimum operating magnetic field strength (H _min ) in the range of 0.5 A / m to 3.0 A / m is a non-contact IC tag label that is affected by using the magnetic material sheet 10. In this case, a reader / writer with 1 W output has a communication distance of about 100 mm to 300 mm with a reader / writer with 50 mm to 100 mm and 4 to 8 W output.
Even if it is not based on the test method prescribed | regulated to the said JIS or ISO, the rough minimum operating magnetic field intensity | strength can be known by grasping | ascertaining the communication distance with the said reader / writer.

Next, the manufacturing method of the non-contact IC tag label etc. of this invention is demonstrated.
In the manufacture of the non-contact IC tag label 1a, since the magnetic material sheet 10 has a considerable thickness, in the case of mass production, the magnetic material sheet 10 or It is considered appropriate to temporarily manufacture the surface sheet 4, the adhesive sheet and the like on the magnetic material coated sheet 10 ′ and then manufacture it by the press laminating process. However, when manufacturing a small amount easily, it can be as follows.

  First, the antenna coil 2 is manufactured on a base material to be the inlet base 11 by a process such as photoetching or printing. Next, the IC chip 3 is attached to both end portions 2a and 2b of the antenna coil 2 with an anisotropic conductive adhesive sheet or an adhesive to make electrical connection. The magnetic material coating sheet 10 is adhered to the antenna coil 2 surface side of the inlet base 11, and the surface sheet 4 is further laminated. The pressure-sensitive adhesive layer 6 is applied and attached to the release paper 8 on the side of the inlet base 11 opposite to the antenna coil 2 and on the adherend side.

The non-contact IC tag sheet 1b is manufactured in the same process, but the magnetic material coating sheet 10 is bonded to the surface of the antenna base 2 of the inlet base 11 and the surface sheet 4 is laminated.
On the side of the inlet base 11 opposite to the antenna coil 2, a display sheet 12 on which visible information 13 has been printed is laminated in advance. The printable information may be printed and recorded after the non-contact IC tag sheet 1b is completed. When providing the heat-sensitive rewrite display part 14, it is preferable to apply to the display sheet 12 in advance before the inlet base lamination.

<About the thermal rewrite display>
As a thermally rewritable material, a reversible thermosensitive recording material in which a higher fatty acid is dispersed in a polymer material can be preferably used.
This thermosensitive recording material is capable of selectively realizing a cloudy state and a transparent state at room temperature depending on the difference in heating temperature, and is known as a thermochromic agent, the composition of which is a matrix material made of a thermoreversible material and this It consists of a low molecular weight organic substance dispersed in a matrix material. Such a thermosensitive recording material has a characteristic temperature region at a temperature higher than room temperature.

  Now, when considering the concentrations t0, t1, and t2 that are higher in order from room temperature, a heat-sensitive recording material that is cloudy at room temperature is heated from room temperature to a temperature t1 that is higher than the temperature t0, and then cooled to room temperature. It becomes. Further, when the heat-sensitive recording material is heated to a temperature higher than the temperature t2 and then cooled to room temperature, the white turbid state is maintained. Therefore, recording and erasing can be repeated by giving such temperature conditions.

  Examples of the matrix material used as a material for such a heat-sensitive recording material include polyester, polyamide, polyacrylate, polymethacrylate, polystyrene, silicone resin, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, and vinylidene chloride-vinyl chloride copolymer. One or more polymers selected from the following thermoplastic resins can be used. Organic low molecular weight substances include saturated or unsaturated mono- and dicarboxylic acids or their esters, amides and ammonium salts, saturated or unsaturated halogenated fatty acids or their esters, amides and ammonium salts, arylcarboxylic acids or their esters, amides And one or more substances selected from organic compounds having 10 to 60 carbon atoms, particularly preferably 10 to 30 carbon atoms, which are ammonium salts. Particularly preferred substances include linear saturated fatty acids such as palmitic acid, stearic acid, arachidic acid, behenic acid, lauric acid or their esters, amides and ammonium salts. These substances are dispersed in the above-described polymer, but a small amount of a surfactant or the like is added in addition.

  The ratio of the organic low molecular weight substance and the resin base material in the heat-sensitive layer is preferably about 2: 1 to 1:10, more preferably 1: 1 to 1: 3 in terms of mass ratio. The thickness of the heat sensitive layer is preferably 1 to 30 μm, more preferably 2 to 15 μm. This is because if the heat-sensitive layer is too thin, the white turbidity is lowered and is difficult to visually recognize. If the heat-sensitive layer is too thick, the heat distribution in the layer becomes non-uniform and it becomes difficult to make it transparent uniformly. Since this heat-sensitive recording material itself has film-forming properties, it can be used alone, but a surface transparent protective layer made of a thin layer such as an epoxy resin or a silicon resin is provided on the heating side surface This is preferable for enhancing durability. Such a thermosensitive reversible recording material can be applied by obtaining a commercial product.

<Embodiments related to other materials>
(1) Substrate for inlet base A wide variety of plastic films can be used, and the following single films or composite films thereof can be used.
Polyethylene terephthalate (PET), PET-G (terephthalic acid-cyclohexanedimethanol-ethylene glycol copolymer), polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, polycarbonate, polyamide, polyimide, cellulose diacetate, cellulose triacetate, Polystyrene, ABS, polyacrylate, polypropylene, polyethylene, polyurethane, and the like.

(2) Surface sheet and display sheet A wide variety of plastic films and paper substrates can be used. As the plastic film, those listed above can be used, and as the paper substrate, high-quality paper, coated paper, craft paper, glassine paper, synthetic paper, latex, melamine-impregnated paper, or the like can be used. In the case of performing printer printing on the surface, paper base materials such as high-quality paper and coated paper are particularly preferable.

(3) Adhesive, pressure-sensitive adhesive In the present specification, the term adhesive refers to various types such as a solvent type, a polymerization type, an ultraviolet curable type, an emulsion type, and a heat-melt type. Shall be included. It may be in the form of a sheet instead of being liquid. In either case, the purpose can be achieved by bonding the two materials. Further, in the present specification, the term “adhesive” refers to an adhesive that keeps an intermediate tack state indefinitely without a significant increase in viscosity.
Various resin compositions such as natural rubber, nitrile rubber, epoxy resin, vinyl acetate emulsion, acrylic, acrylate copolymer, polyvinyl alcohol, phenol resin, etc. Material can be used.

(4) Magnetic material sheet Various types of magnetic material sheets are commercially available. Generally, a sheet obtained by dispersing a magnetically permeable material in a polymer or a magnetic material coated sheet is obtained. Although there are sintered materials of ferrite and metal, etc., it is considered that the flexibility is insufficient. As described above, those having an initial permeability of 20 or more at a frequency of 13.56 MHz are selected and used.
As the polymer dispersion sheet material, magnetically permeable materials such as sendust, ferrite, carbonyl iron, and iron-permalloy are made of rubber polymers such as nitrile rubber, chloroprene rubber, silicone rubber, polyurethane rubber, and cyclized rubber, chlorosulfonated polyethylene, epoxy Many are dispersed in polymers such as resin and chlorinated polyethylene.
Examples of such commercially available magnetic sheets include product series such as “IRL” and “IRJ” manufactured by TDK Corporation, and “RFID magnetic sheet” manufactured by Nitta Corporation.
Further, although not generally used, a material obtained by coating a permeable magnetic material on a polyethylene terephthalate (PET) sheet or the like may be used.

  In the case of the magnetic material coated sheet 10 ′, a soft magnetic material is coated on the base material, and the total thickness thereof is in the range of 50 μm to 250 μm, preferably in the range of 50 μm to 200 μm, more preferably 50 μm. It is desired to be set to ˜150 μm. This range is used because flexibility as a label is obtained, processability is good, and adhesion to an adherend is also good. Accordingly, the thickness of the coating layer 10b is about 10 μm or more and about 200 μm or less. If the total thickness of the magnetic material coating sheet 10 ′ including the base material sheet 10a is less than 50 μm, the required coating thickness of the magnetic material cannot be obtained, and sufficient effects cannot be obtained.

Hereinafter, actual embodiments will be described using examples.
<Non-contact IC tag label>
As a magnetic material sheet 10, a magnetic material coated sheet (test sample) was prepared by coating a polyethylene terephthalate (PET) sheet 10 a having a thickness of 25 μm with a soft magnetic material made of a ferrite-based material and coating it so that the thickness after drying becomes 100 μm. Work) 10 'was used.
In addition, the initial magnetic permeability (measurement method by a coaxial tube method) in the frequency 13.56 MHz of the said magnetic material coating sheet 10 'is 20. The size of the magnetic material coated sheet 10 ′ was the same size (54 mm × 86 mm) as the inlet base 11 of the non-contact IC tag label 1a.

  As a base material for the inlet base 11 of the non-contact IC tag label 1a, a material obtained by dry laminating a 25 μm thick aluminum foil on a transparent biaxially stretched PET film having a thickness of 38 μm is coated with a photosensitive resist. A photomask having a pattern was exposed and exposed. After exposure and development, photoetching was performed to complete the antenna coil 2 as shown in FIG. The antenna coil 2 has an outer shape of approximately 45 mm × 76 mm.

An IC chip 3 having a planar size of 1.0 mm square and a thickness of 150 μm was applied to both ends of the antenna coil 2 of the inlet base 11 by applying heat pressure in a face-down state to complete the inlet base 11. An anisotropic conductive adhesive sheet was used for mounting.
Next, the previously prepared magnetic material coated sheet 10 ′ is bonded to the antenna coil 2 surface using an adhesive so that the PET sheet 10 a is on the inlet base 11 side. High-quality paper) 4 was bonded to the surface of the antenna coil 2 via the adhesive layer 9a to the surface of the magnetic material coated sheet 10 '. Next, a non-contact IC tag label 1a is attached to the side of the inlet base 11 opposite to the antenna coil 2 by sticking a release paper 8 coated with an adhesive (acrylic ester copolymer system) as an adhesive layer 6 having a thickness of 16 μm. completed.

<Non-contact IC tag sheet>
As the magnetic material sheet 10, a magnetic material sheet (“IRL02” manufactured by TDK Corporation) having a thickness of 50 μm was used. The initial magnetic permeability (measurement method by the coaxial tube method) at a frequency of 13.56 MHz of the magnetic material sheet 10 is 25. The size of the magnetic material sheet 10 was the same size (54 mm × 86 mm) as the inlet base 11 of the non-contact IC tag sheet 1b.

An antenna coil 2 was formed in the same process as in Example 1 using a material obtained by dry laminating a 25 μm thick aluminum foil on the same base material for inlet base 11 as in Example 1. The same IC chip 3 as in Example 1 was used, and the IC chip 3 was attached to both ends 2a and 2b of the antenna coil by applying heat pressure in a face-down state. The IC chip mounting method was also the same as in Example 1.
Next, after adhering the magnetic material sheet 10 to the surface of the antenna coil 2 using a pressure-sensitive adhesive via a PET film 5 having a thickness of 25 μm (see FIG. 5), a surface sheet (quality paper) 4 having a thickness of 20 μm. Was bonded to the surface of the magnetic material sheet 10 via an adhesive layer 9d. Next, visible information 13 is printed on the side opposite to the antenna coil 2 of the inlet base 11, and a display sheet (coated paper) 12 having a thickness of 40 μm on which the heat-sensitive rewrite display unit 14 is formed is provided via an adhesive layer 9a. Glued. Thereby, the non-contact IC tag sheet 1b was completed.

  The thermal rewriting display unit 14 performs black printing as a base printing layer on the coated paper surface, and a polymer / fatty acid reversible recording material (manufactured by Ricoh Co., Ltd.) is applied to the thickness of 8 μm thereon. Further, a urethane acrylate ultraviolet curable resin having a thickness of 4 μm is formed on the surface as a surface protective layer.

The minimum operating magnetic field strength (H _min ) of the non-contact IC tag label 1a of the first embodiment and the non-contact IC tag sheet 1b of the second embodiment is set as described in JISX 6305-7: 2001. The minimum operating magnetic field strength (H _min ) at a frequency of 13.56 MHz when measured by the test method specified in the functional test of VICT and pasted on a non-metallic surface is 0.8 A / m to 1.5 A / m. It was confirmed that the minimum operating magnetic field strength (H _min ) when adhered to a metal surface was in the range of 1.5 A / m to 2.5 A / m.

After affixing the non-contact IC tag label 1a of Example 1 to the delivery slip, the magnetic material sheet 10 is made of a metal container using the rubber band 23 with the non-contact IC tag sheet 1b of Example 2 as it is. In the case of attachment (refer to FIG. 6C), it was confirmed that non-contact communication with the reader / writer was possible without any trouble.
It was confirmed that printing, erasing and rewriting by the thermal head on the thermal rewriting display portion 14 of the non-contact IC tag sheet 1b were possible.

It is a schematic plane perspective view which shows the example of the non-contact IC tag label of this invention. It is a figure which shows schematic sectional structure of a non-contact IC tag label. It is a figure which shows schematic sectional structure of the non-contact IC tag label of another example. It is a schematic plane fracture view showing an example of the non-contact IC tag sheet of the present invention. It is a figure which shows schematic sectional structure of a non-contact IC tag sheet. It is a figure which shows the usage example of a non-contact IC tag label and an IC tag sheet. It is a figure explaining the influence of the metal body which a non-contact IC tag receives. It is a figure explaining the usage example of the conventional non-contact IC tag label corresponding to a metal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Non-contact IC tag label 2 Antenna coil 3 IC chip 4 Surface sheet 5 Plastic film 6 Adhesive layer 7 Conductive member 8 Release paper 9a, 9b, 9c Adhesive layer 10 Magnetic material sheet 10 'Magnetic material coating sheet 11 Inlet base 12 Display sheet 13 Visible information 14 Thermal rewriting display section 15 Voucher, price tag, tag, etc. 20 Product, product 30 Reader / writer

Claims (13)

An IC chip with a memory function capable of reading information in a non-contact manner and an antenna coil for transmitting and receiving electromagnetic waves are electrically connected on the inlet base, and are attached to the adherend on the side opposite to the inlet base antenna coil. In the non-contact IC tag label having a pressure-sensitive adhesive layer and a pressure-sensitive adhesive protective release paper in order, the inlet base antenna coil surface has an initial permeability of 20 or more at a frequency of 13.56 MHz and a sheet thickness of 50 μm or more. A non-contact IC tag label characterized by laminating magnetic material sheets of 300 μm or less and further having a surface sheet on the surface of the magnetic material sheet. The minimum operating magnetic field strength at a frequency of 13.56 MHz is 0.5 A / m or more and 3.0 A / m or less when the non-contact IC tag label is used on a non-metal surface. The non-contact IC tag label according to 1. The minimum operating magnetic field strength at a frequency of 13.56 MHz is 1.0 A / m or more and 3.5 A / m or less when the non-contact IC tag label is used on a metal surface. Or the non-contact IC tag label of Claim 2. The magnetic material sheet is a magnetic material coated sheet in which a coating layer of a material in which a soft magnetic material having a thickness of 10 μm or more and 200 μm or less is mixed with a plastic film having a thickness of 10 μm or more and 50 μm or less. The non-contact IC tag label according to any one of claims 1 to 3, wherein the non-contact IC tag label is. The non-contact IC tag label according to any one of claims 1 to 4, further comprising a single-layer plastic film between the magnetic material sheet and the inlet base. 6. The non-contact IC tag label according to claim 1, wherein the constituent layers of the non-contact IC tag label are in close contact with each other with an adhesive or a pressure-sensitive adhesive. 7. An IC chip with a memory function capable of reading information in a non-contact manner and an antenna coil for transmitting and receiving electromagnetic waves are electrically connected on the inlet base, and a display sheet that holds visible information on the side opposite to the inlet base antenna coil A magnetic material sheet having an initial permeability of 20 or more at a frequency of 13.56 MHz and a sheet thickness of 50 μm or more and 300 μm or less is laminated on the inlet-based antenna coil surface. The non-contact IC tag sheet further comprises a surface sheet on the magnetic material sheet surface. When the non-contact IC tag sheet is used on a non-metal surface, the minimum operating magnetic field strength at a frequency of 13.56 MHz is 0.5 A / m or more and 3.0 A / m or less. Item 8. The non-contact IC tag sheet according to Item 7. The minimum operating magnetic field strength at a frequency of 13.56 MHz is 1.0 A / m or more and 3.5 A / m or less when the non-contact IC tag sheet is used on a metal surface. The non-contact IC tag sheet according to claim 7 or 8. The magnetic material sheet is a magnetic material coated sheet in which a coating layer of a material in which a soft magnetic material having a thickness of 10 μm or more and 200 μm or less is mixed with a plastic film having a thickness of 10 μm or more and 50 μm or less. The non-contact IC tag sheet according to any one of claims 7 to 9, wherein 11. The non-contact IC tag sheet according to claim 7, further comprising a single-layer plastic film between the magnetic material sheet and the inlet base. The contactless IC tag sheet according to any one of claims 7 to 11, wherein each of the constituent layers of the contactless IC tag label is in close contact with an adhesive or an adhesive. The non-contact IC tag sheet according to claim 7, further comprising a heat-sensitive rewrite display portion on a surface of the display sheet carrying the visible information.

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