JP7162441B2 - RFID tag and the form to which it is attached - Google Patents

Description

TECHNICAL FIELD The present invention relates to an RFID tag having an antenna formed on a base material and capable of non-contact communication, and a form to which the RFID tag is attached.

2. Description of the Related Art Recently, with the development of an information society, information is recorded on tags attached to products, etc., and products, etc. are managed using these tags. In the management of products using such tags, RFID tags equipped with IC chips capable of writing and reading information in a non-contact state are rapidly becoming popular due to their excellent convenience. popularization is progressing.

An RFID tag generally has an antenna formed on a base material and an IC chip mounted thereon, and non-contact communication is performed between a reader/writer provided outside and the IC chip via the antenna. Conventionally, such an antenna has generally been constructed by laminating a copper foil on a base material and processing the copper foil into a predetermined shape by etching or the like. One made of aluminum is used (see, for example, Patent Document 1). By constructing the antenna from aluminum in this manner, the cost can be reduced.

JP 2016-95679 A

The RFID tag as described above is often used by attaching it to a fibrous sheet such as high-quality paper. In that case, the fiber sheet easily expands and contracts due to environmental changes such as ambient temperature and humidity. There is a problem that the communication distance of the RFID tag is shortened due to the influence of

The present invention has been made in view of the problems of the prior art as described above, and even if the antenna for non-contact communication is made of aluminum, To provide an RFID tag and a form to which the RFID tag is attached which can avoid shortening of a communication distance in some cases.

In order to achieve the above object, the present invention
An RFID tag having an antenna for contactless communication made of aluminum,
First and second PET layers made of polyethylene terephthalate sandwiching the antenna;
a surface sheet made of polypropylene, which has the same outer shape as the first and second PET layers, is laminated on the side opposite to the antenna of the first PET layer, and constitutes the outermost surface of the RFID tag; have
The antenna is formed on one surface of the first PET layer,
The second PET layer has an adhesive layer laminated on the front and back,
Of the adhesive layers, only the adhesive layer laminated on the surface of the second PET layer opposite to the first PET layer is attached to the fiber-based sheet .

In the present invention configured as described above, the contactless communication antenna made of aluminum is sandwiched between the first and second PET layers made of polyethylene terephthalate, and the antenna of the first PET layer Since the surface sheet made of polypropylene that constitutes the outermost surface of the RFID tag is laminated on the opposite side, when it is attached to the fiber sheet with the side opposite to the surface sheet as the adhesion surface, the fiber Even if the system sheet expands and contracts due to changes in the environment such as ambient temperature and humidity, the first and second PET layers and the surface sheet do not follow this expansion and contraction, so the sheet is sandwiched between the first and second PET layers. This prevents the antenna from being affected by the expansion and contraction of the fiber-based sheet, thereby avoiding shortening of the communication distance.

Further, the antenna is formed on one surface of the first PET layer, and the adhesive layer is laminated on the front and back sides of the second PET layer, so that the RFID tag alone can be used as a label.

In addition, if the surface sheet is colored to make it difficult to see through the antenna, when the information displayed on the adherend is read while attached to the adherend, the antenna may be mistaken as the information to be read. It is possible to avoid reading

Further, as the form to which the above-described RFID tag is attached, a form made of a fibrous sheet to which the RFID tag is attached with the side opposite to the surface sheet as an attachment surface is conceivable.

According to the present invention, the contactless communication antenna made of aluminum is sandwiched between the first and second PET layers made of polyethylene terephthalate, and the RFID tag is placed on the side of the first PET layer opposite to the antenna. Since the top sheet made of polypropylene that constitutes the outermost surface of the is laminated, when the fiber sheet is attached with the opposite side of the top sheet as the sticking surface, the fiber sheet will not be affected by the surrounding temperature and humidity. Even if the antenna expands and contracts due to changes in the environment such as the above, the antenna is not affected by the expansion and contraction of the fiber sheet, so that the communication distance can be prevented from being shortened.

Further, the antenna is formed on one surface of the first PET layer, and the second PET layer is laminated with adhesive layers on the front and back surfaces, so that the RFID tag can be used as a label alone.

In addition, in the case where the surface sheet is colored to make it difficult to see through the antenna, when the information displayed on the adherend is read while the surface sheet is adhered to the adherend, the information to be read from the antenna is read. It is possible to avoid erroneously reading as

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing one embodiment of the RFID tag of the present invention, (a) is a surface view, (b) is an AA′ cross-sectional view shown in (a), and (c) is shown in (b) It is the figure which decomposed|disassembled sectional drawing for every member, and (d) is a figure which shows the structure of the lamination surface with the adhesion layer of an inlay. FIG. 2 is a diagram for explaining how to use the management tag shown in FIG. 1, (a) is a diagram showing the configuration of the surface of the management sheet to which the management tag is attached, and (b) is a diagram to which the management tag is attached. FIG. 10 is a diagram showing the configuration of the back surface of the printed management sheet. FIG. 3 is a diagram for explaining an effect when the management tag shown in FIG. 1 is attached to a management sheet as shown in FIG. 2; It is a diagram showing another embodiment of the RFID tag of the present invention, (a) is a surface view, (b) is an AA' cross-sectional view shown in (a), (c) is shown in (b) FIG. 4D is a view showing the cross-sectional view disassembled for each member, and FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of the RFID tag of the present invention, (a) is a surface view, (b) is an AA' cross-sectional view shown in (a), (c) is (b ) is an exploded view showing each member, and (d) is a view showing the configuration of the laminated surface of the inlay 10 and the adhesive layer 30. FIG.

As shown in FIG. 1, this embodiment is a management tag 1 in the form of a label in which a tack paper 20, an inlay 10, an adhesive layer 30, and a release paper 40 are laminated.

The tack paper 20 is configured by laminating an adhesive layer 21 by applying an adhesive to the entire surface of one surface of a surface sheet 21 made of PP (polypropylene). The surface sheet 21 is colored white, which makes it difficult to see through from one side to the other side.

The inlay 10 has an aluminum antenna 13 for non-contact communication formed on one surface of a sheet-like base material 11 which is a first PET layer made of PET (polyethyleneterephthalate). An IC chip 12 that is connected to an antenna 13 and performs contactless communication via the antenna 13 is mounted. The inlay 10 configured in this manner is laminated on the tack paper 20 so that the surface of the base material 11 on which the antenna 13 is not formed faces the surface of the surface sheet 21 on which the adhesive layer 22 is laminated. It is adhered to tack paper 20 by layer 22 .

The adhesive layer 30 is formed by laminating adhesive layers 32a and 32b by applying an adhesive to each of the front and back surfaces of a sheet-like core substrate 31 which is made of PET and serves as a second PET layer. . The adhesive layer 30 configured in this way is laminated on the inlay 10 so that the surface of the core substrate 31 on which the adhesive layer 32a is laminated faces the surface of the base substrate 11 on which the antenna 13 is formed, It is adhered to the inlay 10 by an adhesive layer 32a. As a result, the adhesive layer 30 is laminated so as to cover the antenna 13 formed on the base material 11 .

By laminating the inlay 10 and the adhesive layer 30 in this manner, the antenna 13 made of aluminum is formed by the base material 11 made of PET and the core material 31 made of PET that constitutes the adhesive layer 30 . It is sandwiched.

A release paper 40 is detachably attached to the adhesive layer 32b side of the adhesive layer 30 by the adhesive layer 32b.

The method of using the management tag 1 configured as described above and the effects thereof will be described below.

2A and 2B are diagrams for explaining how to use the management tag 1 shown in FIG. 4 is a diagram showing the configuration of the back surface of the management sheet to which the management tag 1 is attached. FIG.

The management tag 1 shown in FIG. 1 is used by being attached to the back surface of the management sheet 2 which becomes a form as shown in FIG. The management sheet 2 is made of a fibrous sheet such as high-quality paper. A linear timing mark 2b extending in a direction orthogonal to the conveying direction of the management sheet 2 is displayed at the leading end of the conveying direction when the management information is printed in the display area 2a. The management tag 1 is attached to the area along this timing mark 2b.

The management sheet 2 configured as described above and having the management tag 1 affixed thereto is conveyed with the side on which the timing mark 2b is displayed for printing the management information in the management information display area 2a as the leading edge.

When the timing mark 2b is recognized, first, contactless communication is performed with the IC chip 12 of the management tag 1 by an external reader/writer, and data corresponding to the management information is written in the IC chip 12. .

When data writing to the IC chip 12 is completed, management information is printed in the management information display area 2a. Also, if the writing of data to the IC chip 12 fails, a defect mark is printed in the management information display area 2a.

The timing of writing data to the IC chip 12 of the management tag 1 and printing the management information to the management information display area 2a depend on the interval between the timing mark 2b and the management tag 1 and the management information display area 2a, and on the management sheet. 2, and is carried out after the time according to the set timing has elapsed after the timing mark 2b was read.

At this time, since the management tag 1 is affixed to the area along the timing mark 2b, even if the management sheet 2 is distorted or misaligned during transportation, the data of the management tag 1 to the IC chip 12 can be transferred. It becomes difficult to shift the writing timing. In addition, although the management tag 1 includes an antenna 13, the antenna 13 is covered with the surface sheet 21, and the surface sheet 21 is colored white, making it difficult to see through the antenna 13. Therefore, erroneous reading of the antenna 13 as the timing mark 2b can be avoided. The surface sheet 21 is not limited to being colored white, and may be colored so that it is difficult to see through from one surface to the other surface.

FIG. 3 is a diagram for explaining the effects when the management tag 1 shown in FIG. 1 is attached to the management sheet 2 as shown in FIG.

Since the management sheet 2 shown in FIG. 2 is made of a fibrous sheet, it easily expands and contracts due to environmental changes such as ambient temperature and humidity. Therefore, when the management tag 1 is attached to the management sheet 2 as described above, the base material 11 and the core material 31 may follow expansion and contraction of the management sheet 2 . When the base material 11 and the core material 31 expand and contract following the expansion and contraction of the management sheet 2, the antenna 13 formed on the base material 11 is made of aluminum, so that the antenna 13 is affected by the expansion and contraction. As a result, the communication distance of the management tag 1 is shortened.

However, in the management tag 1 shown in FIG. 1, as described above, the base material 11 and the core member 31 sandwiching the antenna 13 are each made of PET. Since the surface sheet 21 made of PP is laminated on the side, when the adhesive layer 30 is attached to the management sheet 2 made of a fibrous sheet, the management sheet 2 is affected by the surrounding temperature, humidity, etc. Even if the base material 11 and the core material 31 made of PET and the surface sheet 21 made of PP expand and contract as shown in FIG. The antenna 13 sandwiched between the material 11, the core base material 31 and the surface sheet 21 is not affected by the expansion and contraction of the management sheet 2, and the communication distance is shortened even if the antenna 13 is made of aluminum. can be avoided.

The effects described above are obtained not only when the management tag 1 is attached to the management sheet 2 as shown in FIG. Obtainable.

Further, in this embodiment, an adhesive layer 30 is laminated by laminating adhesive layers 32a and 32b on the front and back of a core substrate 31 on the surface of the inlay 10 opposite to the tack paper 20 as an example. As described above, if the core substrate 31 made of PET is laminated on the inlay 10, the adhesive layer 32b may not be laminated on the surface of the core substrate 31 opposite to the inlay 10. . However, in that case, when attaching to a form made of a fibrous sheet, it is necessary to separately prepare an adhesive and stick the co-1 base material 31 to the form made of a fibrous sheet. Thus, if the adhesive layers 32a and 32b are laminated on the front and back of the core base material 31, the management tag 1 alone can be used as a label.

(Other embodiments)
FIG. 4 is a diagram showing another embodiment of the RFID tag of the present invention, (a) is a surface view, (b) is an AA' sectional view shown in (a), (c) is ( FIG. 2B is a diagram showing the cross-sectional view shown in FIG. 1B exploded into members, and FIG.

In this embodiment, as shown in FIG. 4, in contrast to the one shown in FIG. The management tag 101 is different in that it is configured as follows. That is, unlike the management tag 1 shown in FIG. 1, the management tag 101 of this embodiment is not in the form of a label.

The back sheet 140 is made of a fibrous sheet such as high-quality paper, and is attached to the adhesive layer 132b side of the adhesive layer 130 by the adhesive layer 132b.

In the management tag 101 configured as described above, since the back sheet 140 is made of a fibrous sheet, it easily expands and contracts due to environmental changes such as ambient temperature and humidity. Furthermore, the base material 111 and the core member 131 sandwiching the antenna 113 are each made of PET, and the surface sheet 121 made of PP is laminated on the opposite side of the base material 111 to the antenna 113. Even if the back sheet 140 expands and contracts due to environmental changes such as ambient temperature and humidity, the base material 111 and the core material 131 made of PET and the top sheet 121 made of PP do not follow this expansion and contraction. , the antenna 113 sandwiched between the base material 111, the core material 131, and the top sheet 121 is not affected by the expansion and contraction of the back sheet 140, and the communication distance is shortened even if the antenna 113 is made of aluminum. You can avoid getting lost.

1,101 management tag 2 management sheet 2a management information display area 2b timing mark 10,110 inlay 11,111 base material 12,112 IC chip 13,113 antenna 20,120 tack paper 21,121 surface sheet 22,32a, 32b, 122, 132a, 132b adhesive layer 30, 130 adhesive layer 31, 131 core substrate 40 release paper 140 back sheet

Claims (3)

An RFID tag having an antenna for contactless communication made of aluminum,
First and second PET layers made of polyethylene terephthalate sandwiching the antenna;
a surface sheet made of polypropylene, which has the same outer shape as the first and second PET layers, is laminated on the side opposite to the antenna of the first PET layer, and constitutes the outermost surface of the RFID tag; have
The antenna is formed on one surface of the first PET layer,
The second PET layer has an adhesive layer laminated on the front and back,
The RFID tag is attached to the fibrous sheet only by the adhesive layer laminated on the surface of the second PET layer opposite to the first PET layer among the adhesive layers . In the RFID tag according to claim 1 ,
The RFID tag, wherein the surface sheet is colored so that the antenna is difficult to see through. A form to which the RFID tag according to claim 1 or claim 2 is attached,
Consisting of the fibrous sheet,
A management information display area provided on the side opposite to the surface to which the RFID tag is attached and in which information is printed;
a timing mark provided on the surface to which the RFID tag is affixed, provided on the front end side of the document in the conveying direction when information is printed in the management information display area;
the RFID tag is affixed to an area along the timing mark;
A form, wherein data is written in an IC chip of the RFID tag and information is printed in the management information display area at a timing based on the timing at which the timing mark is read.

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