JP2007140113A - Contactless ic tag label - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a contactless IC tag label whose flexibility is improved by providing through holes to the base film and the surface protection sheet of the contactless IC tag label. <P>SOLUTION: The contactless IC tag label 1a of the present invention has an antenna coil 3 formed on one surface side of a base film 11 and an IC chip 2 mounted on the antenna coil, has a surface protection sheet bonded to the surface of the antenna coil 3, and has a tacky adhesive layer and peel paper on the surface of the base film 11 on the opposite side of the antenna coil 3, and is characterized in that the base film 11 has a plurality of through holes 10 formed to make the label flexible. The label can have a second surface protection sheet and have through holes formed in the protection sheet. Here, the antenna is not limited to a plane coil type and can be a dipole type. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a non-contact IC tag label. Specifically, the present invention relates to a non-contact IC tag label in which a protective sheet is laminated on the surface, and a flexible non-contact IC tag label in which a plurality of through holes are formed in the base film so that the entire IC tag has flexibility. Such a non-contact IC tag label can be suitably used by sticking to a curved surface or uneven surface of an article or product. Therefore, the technical field of the present invention is the field of manufacturing and using non-contact IC tag labels.

A “non-contact IC tag label” (generally expressed as “non-contact IC tag”, “wireless IC tag”, “non-contact IC”, etc.) that can record and read information in a non-contact manner. It has been widely used for information management of goods and goods, logistics management, and the like.
This non-contact IC tag label has a form in which a coiled antenna or a dipole antenna is formed on a base film surface made of a film or a paper base, and an IC chip is mounted on the antenna, but durability is required. In this case, a form in which a surface protection sheet is laminated on the antenna surface is preferable.

5 and 6 are diagrams showing a conventional non-contact IC tag label. FIG. 5 is a plan view, and FIG. 6 is a cross-sectional view of a portion passing through the IC chip 2 of FIG.
As shown in FIG. 5, in the conventional non-contact IC tag label 1 j, the planar antenna coil 3 is formed on the base film 11, and the IC chip 2 is attached to both connection ends 3 a and 3 b of the antenna coil 3. . In the embodiment of FIG. 5, the back surface circuit of the base film 11 is formed by the conductive member 17 in a part of the coil to prevent a short circuit.
As shown in FIG. 6, the surface protective sheet 5 is laminated on the base film 11 via the adhesive layer 7 a to protect the antenna coil 3 and the IC chip 2. An adhesive layer 8 and a release paper 9 that covers and protects the adhesive layer 8 are laminated on the side surface of the base film 11 opposite to the antenna coil 3. When the non-contact IC tag label 1j is used, the release paper 9 is removed and attached to the article.

  In such a non-contact IC tag label 1j, when the base film 11 has a certain thickness, there is a problem that the flexibility becomes insufficient and the sticking to an article or product having a curved surface or unevenness becomes incomplete. In particular, when pasted onto a cylindrical glass container or plastic container, what appears to be completely pasted at the beginning rises with the passage of time, and the tendency to eventually peel off is noticeable. There was a problem.

  By the way, there are four types of frequency bands of the non-contact IC tag label: 135 KHz band or lower, 13.56 MHz band, 860 MHz to 960 MHz band belonging to UHF band, and 2.45 GHz band. The electromagnetic induction method is used for the 13.56 MHz band and below. The electromagnetic induction system is a system that converts magnetic force into electricity, and uses a loop-shaped antenna, that is, a coil-shaped antenna as described above. A non-contact IC tag label of a dipole antenna is used in a high frequency region above the UHF band. Although the conventional structure of this is not shown in the drawing, the laminated structure has insufficient flexibility and similarly causes the problem of floating.

  Therefore, in the present invention, the base film 11 of the non-contact IC tag label is provided with a plurality of relatively small holes that penetrate the film, thereby making the non-contact IC tag label flexible and flexible. It is. Although prior art relating to such technology cannot be detected in particular, Patent Document 1 discloses an example in which a through hole is provided in a non-contact IC tag base material for a different purpose. However, since this document aims at adhesion between films, a considerably large opening is formed. Further, there is Patent Document 2 that performs a flexibility imparting process on a film carrier substrate, although the fields are different.

JP 2003-132331 A JP-A-63-58848

  It is an object of the present invention to improve the flexibility of a non-contact IC tag label. In particular, a plurality of through-holes are formed on the base film substrate constituting the non-contact IC tag label from the viewpoint of sticking to an article or product having a curved surface or an uneven surface, and preventing floating and natural peeling from the periphery of the label. It has been completed through research into forming and increasing flexibility.

  The first of the gist of the present invention that solves the above-mentioned problems is the surface protection sheet that has an antenna coil formed on one surface side of the base film and an IC chip attached to the antenna coil, and is further adhered to the antenna coil surface, In a non-contact IC tag label having an adhesive layer and a release paper in order on the side opposite to the antenna coil of the base film, the base film has a plurality of through holes for making the label flexible. The non-contact IC tag label is characterized in that.

  The second of the gist of the present invention for solving the above problems is a surface protection sheet having a dipole antenna formed on one side of a base film and an IC chip attached to the antenna, and further adhered to the antenna surface, a base In a non-contact IC tag label having an adhesive layer and release paper in order on the side opposite to the film antenna, a plurality of through holes are formed on both sides of the dipole antenna of the base film to make the label flexible. It is in the non-contact IC tag label characterized by being made.

In the above, it can be made to have a 2nd surface protection sheet between a base film and a surface protection sheet, and the 2nd surface protection sheet also has a through-hole. In that case, the flexibility of the entire label can be increased.
In addition, the size of the through hole can be a circle with a diameter of 0.5 mm to 2.0 mm or a square with a passing edge. In this case, the base film is not deformed and the like is produced. Processing and label handling become easy.

  In the non-contact IC tag label of the present invention, since a plurality of through holes are formed in the base film, the label has flexibility and can be easily attached even when it is attached to the curved surface or uneven surface of an article or product. It can be done and does not peel off from the periphery of the label even after sticking.

  Hereinafter, the non-contact IC tag label of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing a first form of a non-contact IC tag label of the present invention, FIG. 2 is a cross-sectional view of the first form, FIG. 3 is a cross-sectional view of a modification of the first form, and FIG. It is a figure which shows the 2nd form of the non-contact IC tag label of invention.

The first form of the non-contact IC tag label of the present invention is a form having an electromagnetic induction type loop antenna as shown in FIG. The antenna coil 3 is formed on the base film 11, and the IC chip 2 is mounted on both ends 3 a and 3 b of the antenna coil 3.
Since the non-contact IC tag label 1a has the surface protection sheet 5, the antenna coil 3, the IC chip 2, and the through hole 10 are not actually seen from the surface but are seen through.

The non-contact IC tag label 1a is characterized in that a plurality of through holes 10 are formed in the base film 11 constituting the label. The through-hole 10 is not preferably a large hole that deforms the shape of the antenna when the base film 11 is handled, so it is preferable to form many relatively small holes.
The shape of the through hole 10 is a circle, a square, a rhombus, etc., but the size (diameter or through of the through hole (diagonal line) when the shape is a square) is 0.5 mm to 2.0 mm, more preferably About 0.5 mm to 1.0 mm is desirable. However, it is not necessary that all the through holes have the same shape and size.

The number differs depending on the area of the non-contact IC tag label 1a and the density of the through-holes, and a specific number cannot be specified. However, in practice, the number is a large number such as 20 or 30 or more. Even when the number of the through holes 10 is expressed by the density, it is necessary to change the thickness depending on the thickness of the base film 11 and the size of the through holes. However, usually, if a number of about 0.25 to 5 pieces / cm ² is formed, a sufficient softening effect can be obtained. Rather than forming randomly or irregularly scattered dots, it is preferable to provide through holes so that they are regularly arranged at regular intervals. As a matter of course, the through hole 10 is formed avoiding the antenna line portion and the IC chip 2 portion.

In the case of FIG. 1, the through hole 10 is formed in the entire area of the inner and outer peripheral areas of the antenna coil 3, but it may be formed only in the inner peripheral area. Alternatively, when flexibility only in the peripheral part is required, the through hole may be formed only in the outer peripheral part.
A normal non-contact IC tag label having no through hole can be manufactured, and the through hole can be formed immediately before use depending on the intended use and purpose.

However, when the thickness of the base film 11 exceeds 50 μm, or when flexibility around the label is particularly required, it is preferable to form the through-hole 10 including the outer peripheral area of the antenna coil 3. This is because when the thickness of the plastic film exceeds 50 μm, it is usually a fairly hard film.
When the thickness of the base film 11 is less than 25 μm, since the film itself is generally flexible and does not have a problem of peeling due to insufficient flexibility, there is little need to form a through hole.
On the other hand, when it exceeds 100 μm, the effect of softening does not occur so much depending on the through hole 10. Therefore, the present invention is generally applied when the base film 11 having a thickness in the range of 25 μm to 100 μm is used.

A cross-sectional view of the non-contact IC tag label 1a (a cross section along line AA in FIG. 1) is as shown in FIG.
A surface protective sheet 5 is adhered to the surface of the antenna coil 3 of the base film 11 by an adhesive layer 7a, and a side surface opposite to the antenna coil 3 is covered with the pressure-sensitive adhesive layer 8 and the pressure-sensitive adhesive layer 8 for protection. Paper 9 is laminated. It is recognized that the base film 11 has a vertical hole formed by the through hole 10. Natural rubber or acrylic materials are often used for the adhesive, and the coating thickness is in the range of about 5 μm to 20 μm. The release paper 9 is processed with silicon. The through hole 10 is formed only in the base film 11.

A cross-sectional view of a non-contact IC tag label 1a according to a modification of the first embodiment is as shown in FIG.
In this case, the 2nd surface protection sheet 6 is laminated | stacked on the antenna coil 3 surface of the base film 11, and the surface protection sheet 5 is adhere | attached on the said 2nd surface protection sheet 6 surface. The surface protective sheet 5 can also be referred to as a first surface protective sheet, but generally a paper base is used for display printing. On the other hand, the second surface protective sheet 6 often uses a plastic film for the purpose of protecting the antenna and the IC chip 2 from water and humidity. Therefore, the through-hole 10 is formed also in the 2nd surface protection sheet 6 in order to prevent a label from hardening by the double film structure with the base film 11. FIG.

The through-hole 10 of the base film 11 and the through-hole 10 of the second surface protective sheet 6 can be formed in different steps to form different holes, but usually the second surface protective sheet is formed on the base film 11. After laminating 6, the through hole 10 is formed, so that one through hole is formed. The formation of the through hole also has an effect of easily degassing the air remaining in the inner peripheral area of the coil.
When the second surface protection sheet 6 is provided, the product up to that state is manufactured, and when the intended use or delivery destination is determined, the printed surface protection sheet 5 is laminated to obtain the final product. be able to.

4A and 4B are diagrams showing a second embodiment of the non-contact IC tag label of the present invention, in which FIG. 4A is a plan view, FIG. 4B is a cross-sectional view, and FIG. Figure.
The second form of the non-contact IC tag label of the present invention is a form having a dipole antenna 4 as shown in FIG. The UHF band IC tag uses a dipole antenna, has a long reading distance, and is expected to be widely used in the future. In this case, the quarter wavelength antennas 4R and 4L are formed on the surface of the base film 11, and the IC chip 2 is mounted on the joint portions 4a and 4b of the antennas 4R and 4L. The total length of the antenna 4R and the antenna 4L is set to ½ of the wavelength of the communication frequency. In order to shorten the label length, the antenna is bent as shown in FIG. There are many cases.

The non-contact IC tag label 1b is also characterized in that a plurality of through holes 10 are formed in the base film 11 constituting the label. As in the case of the first embodiment, it is preferable that a large number of through holes 10 be formed with relatively small holes, and the perforations 10 are perforated while avoiding antenna lines and IC chip portions. The non-contact IC tag label 1b of the second form can be finished to a relatively narrow width from its antenna shape. In general, the width is about 20 mm to 50 mm, and the length is about 100 mm to 150 mm. The size of the through hole 10 (the diameter of the hole or the passing (diagonal line in the case of a quadrangle)) is preferably about 0.5 mm to 2.0 mm as in the first embodiment.
The density of the through holes 10 is the same as that in the first embodiment. The shape of the through hole 10 is not particularly limited, and may be circular, square, or rhombus, and it is not necessary that all the through holes have the same shape and size.

Sectional views of the non-contact IC tag label 1b of the second form are as shown in FIGS. 4 (B) and 4 (C). It is the BB sectional view of Drawing 4 (A). In the case of FIG. 4B, the surface protective sheet 5 is bonded to the base film 11, and the through hole 10 is formed only in the base film 11. In the case of the dipole antenna 4, since the width of the label can be narrowed, the flexibility in the width direction is not a problem, but the flexibility in the length direction is improved by forming the through hole.
In the case of FIG. 4C, the second surface protective sheet 6 and the surface protective sheet 5 are overlapped and bonded to the base film 11, and the through hole 10 is formed between the base film 11 and the second surface protective sheet. 6 is formed.

Next, the material used for this invention is demonstrated.
(1) <Base film>
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, Examples thereof include polystyrene, ABS resin, polyacrylate, polypropylene, polyethylene, polyurethane, acrylic, and water-resistant paper.
In general, the thickness of the base material when used for a non-contact IC tag can be about 15 μm to 200 μm, but in the present invention, about 20 μm to 100 μm is preferable.

(2) <Surface protection 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. When performing printing or printer printing on the surface, a paper substrate such as fine paper or coated paper is particularly preferable.
As the surface protection sheets 5 and 6, those having a thickness equivalent to or thinner than that of the base film are used, and preferably about 15 μm to 50 μm.

(3) <Adhesive / Adhesive>
In the present specification, the term “adhesive” refers to various types such as a solvent type, an emulsion type, an ultraviolet curable type, a polymerization type, and a heat melting type, and includes a so-called adhesive type. It may be in the form of a sheet instead of being liquid. 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.

Next, the manufacturing process of the non-contact IC tag label of the present invention will be described.
First, the antenna coil 3 or the dipole antenna 4 is manufactured on the base material to be the base film 11 by a process such as photoetching or printing. In the case of photoetching, a base material obtained by laminating a metal foil of copper or aluminum on a plastic film is used.
Next, the IC chip 2 is attached to the both end portions 3a, 3b of the antenna coil 3 or the joint portions 4a, 4b of the dipole antenna 4 with an anisotropic conductive adhesive, an adhesive sheet or the like to make electrical connection. An IC chip 3 having spike-like bumps may be used so that the spike-like bumps bite into both connection end portions 3 a and 3 b of the antenna coil 3.

When laminating the second surface protective sheet 6, the surface protective sheet 6 is laminated on the antenna surface of the base film 11, and when not laminated, the through hole 10 is formed directly on the surface of the base film 11. Formation of the through-hole 10 can be performed by a continuous process using a punching device, or can be punched in a state of being cut into individual labels. As described above, the size of the through hole is about 0.5 mm to 2.0 mm.
After the through hole 10 is formed, the surface protective sheet 5 is laminated, and the processing of the adhesive layer 8 and the release paper 9 are provided on the back surface of the base film 11 to complete the non-contact IC tag label 1.

  As the base film 11 of the non-contact IC tag label 1a, a transparent biaxially stretched PET film having a thickness of 38 μm was used, and a base material obtained by dry laminating an aluminum foil having a thickness of 25 μm was prepared. A photosensitive resist (made by The Inktec Co., Ltd.) made of a vinyl chloride resin is applied on the aluminum foil surface so that the thickness after drying is 1 μm, and a photomask having an antenna coil pattern is exposed. And exposed. After the development, the exposed portion of the aluminum foil was removed by etching with an aqueous ferric chloride solution to obtain a base film having a 6-sided (2 × 3 side) antenna coil 3.

  Next, the IC chip 2 having a plane size of 1.0 mm square and a thickness of 150 μm is brought into a face-down state, and is aligned with both connection ends 3a and 3b of the antenna coil 3 using an anisotropic conductive adhesive sheet. Attached. A biaxially stretched PET film having a thickness of 20 μm was laminated on the entire surface of the antenna coil surface of the base film 11 on which the IC chip 2 was mounted as the second surface protective sheet 6. Thereafter, the outer dimensions were cut into a card-like shape.

Next, with respect to the laminated body of the base film 11 and the second surface protection sheet 6, circular circular holes 10 having a diameter of 1.0 mm are formed at a density of ² / cm ² in the inner and outer peripheral regions of the antenna coil. Formed. For forming the through-hole 10, a punching die having an opening for one surface of the non-contact IC tag label 1a was prepared in advance, and the die was punched by the punching die.
The through hole 10 was not formed at a position approaching within 2 mm from the antenna line or the IC chip 2. Thereafter, a high-quality paper was laminated on the entire surface as the surface protective sheet 5, and the adhesive layer 8 and the release paper 9 were processed on the back surface of the base film 11. The pressure-sensitive adhesive layer 8 was coated with an acrylic pressure-sensitive adhesive having a thickness of 10 to 12 μm. Then, it cut | judged to predetermined size and completed the non-contact IC tag label 1a.

  As the base film 11 of the non-contact IC tag label 1b, a transparent biaxially stretched PET film having a thickness of 100 μm was used, and a base material obtained by dry-lamination of a 35 μm-thick copper foil was prepared. The copper foil surface is coated with a photosensitive resist (made by The Inktec Co., Ltd.) made of a vinyl chloride resin so that the thickness after drying is 1 μm, and a dipole antenna pattern as shown in FIG. 4 is provided. The photomask it had was exposed and exposed. After development, the exposed portion of the copper foil was removed by etching with a ferric chloride aqueous solution to obtain a base film 11 having a 10-sided (1 × 10 surface) dipole antenna pattern.

Next, the IC chip 2 having a plane size of 1.0 mm square and a thickness of 150 μm is brought into a face-down state, and aligned with the joint portions 4a and 4b of the antennas 4R and 4L using an anisotropic conductive adhesive sheet. Installed.
Next, a circular through hole 10 having a diameter of 0.6 mm was formed in the base film 11 at a density of 4 / cm ^{2 in} a portion of the base film 11 where the antenna pattern 4 and the IC chip 3 were not present. For forming the through-hole 10, a punching die having an opening corresponding to one surface of the non-contact IC tag label was prepared in advance, and the die was sequentially punched by the punching die. Thereafter, the surface protective sheet 5 was laminated, and the adhesive layer 8 and the release paper 9 were processed on the back surface of the base film 11. The pressure-sensitive adhesive layer 8 was made to be coated with an acrylic pressure-sensitive adhesive in an amount of 10 to 12 μm. Thereafter, the outer dimensions were cut into a predetermined shape of 35 mm × 100 mm to complete the non-contact IC tag label 1b.

(Comparative Example 1)
A non-contact IC tag label was completed under the same conditions as in Example 1 except that no through hole was formed, and a non-contact IC tag label 1j in Comparative Example 1 was obtained.
(Comparative Example 2)
A non-contact IC tag label was completed under the same conditions as in Example 2 except that no through hole was formed, and a non-contact IC tag label 1j of Comparative Example 2 was obtained.

The non-contact IC tag labels 1a and 1b of Example 1 and Example 2 and the non-contact IC tag labels 1j of Comparative Examples 1 and 2 are curved glass bottles (glass bottles having a cylindrical body having a diameter of 80 mm). It adhered to the side surface (torso) and observed the change with time.
As a result, the non-contact IC tag labels 1a and 1b of Example 1 and Example 2 could be easily attached and did not peel spontaneously even after 1 month at room temperature. On the other hand, it was recognized that the non-contact IC tag label 1j of the comparative example was lifted at the end of the label (circumferential end of the cylinder) after one month had passed at room temperature.

  The non-contact IC tag labels of Example 1 and Comparative Example 1 were subjected to a reading test with a 13.56 MHz IC tag reader / writer (“RCT-200-01” manufactured by Weltcat Co., Ltd.) in a state of being attached to the glass bottle. It was confirmed that contactless communication was possible as usual. Further, the non-contact IC tag labels of Example 2 and Comparative Example 2 were subjected to a reading test with an IC tag reader / writer of 902 to 928 MHz (“RDR-001” manufactured by Symbol Technology Co., Ltd.) in a state of being attached to the glass bottle. It was confirmed that non-contact communication is possible.

It is a top view which shows the 1st form of the non-contact IC tag label of this invention. It is sectional drawing of a 1st form. It is sectional drawing of the modification of a 1st form. It is a figure which shows the 2nd form of the non-contact IC tag label of this invention. It is a top view which shows the non-contact IC tag label of a prior art example. It is sectional drawing which shows the non-contact IC tag label of a prior art example.

Explanation of symbols

1,1a, 1b Non-contact IC tag label
1j Conventional non-contact IC tag label
2 IC chip
3 Antenna coil
4 Dipole antenna
5 Surface protection sheet
6 Second surface protection sheet
7, 7a, 7b Adhesive layer
8 Adhesive layer
9 Release paper 10 Through hole 11 Base film

Claims (4)

An antenna coil formed on one side of the base film, an IC chip attached to the antenna coil, and a surface protective sheet adhered to the antenna coil surface, and an adhesive layer on the side opposite to the antenna coil of the base film A non-contact IC tag label having a release paper in order, wherein the base film has a plurality of through holes for making the label flexible. A dipole antenna formed on one side of the base film, an IC chip attached to the antenna, a surface protective sheet adhered to the antenna surface, and an adhesive layer and release paper on the side opposite to the antenna of the base film A non-contact IC tag label having a plurality of through holes for making the label flexible on both sides of the dipole antenna of the base film. The second surface protective sheet is provided between the base film and the surface protective sheet, and a through hole is formed in the second surface protective sheet. Non-contact IC tag label. The non-contact IC tag label according to claim 1 or 2, wherein the size of the through hole is a circle having a diameter of 0.5 mm to 2.0 mm or a quadrangle of a passing hole.

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