JP2006215057A - Writing sheet with rfid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display medium capable of uniting with a radio frequency identification (RFID) and recording/erasing (display) information in the same way as the RFID. <P>SOLUTION: A writing sheet with the RFID 7 of a laminated structure comprises; a surface layer sheet 1 having a writing layer 12 on a surface of a first base material sheet 11; inlay 2 of the RFID; a second base material sheet 3 of impermeability. The surface layer sheet is impermeable and the surface layer sheet and the second base material sheet have plane areas of one size larger than the area of the inlay, and the inlay is pinched in a hermetically sealed state between a rear face of the surface layer sheet and the surface of the second base material sheet and an adhesive/exfoliation agent layer 31 is formed on a rear face of the second base material sheet. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is an RFID in which a writing sheet capable of repeated writing and erasing (an example is a writing board sheet of a whiteboard) and an RFID inlay are integrated, and the integrated object can be attached to an article or a parts box. It relates to a sheet for writing.

  The RFID is also called an IC tag, an RF tag, a wireless tag, an electronic tag, or the like, and is used for the purpose of integrating an object to which the RFID tag is attached and information related to the object. Inlay refers to an RFID circuit unit in which an antenna and an IC chip connected to the antenna are fixed on a base film such as PET.

In a conventional RFID card, an inlay is sandwiched between a top sheet and a back sheet (see, for example, Patent Document 1).
When a conventional RFID is used, information such as an object to which the RFID is attached is electromagnetically stored in the RFID, and the information is read by electromagnetic means using a reader. The front and back surfaces of a conventional RFID card are not fixed surfaces for information transmission and are usually fixed printing surfaces.

JP 2000-6560 A

If all the transmission and reception of information is performed electromagnetically, that is, in a state incapable of being perceived by humans, interest in operations such as operation, confirmation, and monitoring by humans may be lost, and the efficiency of the operations may be impaired. For example, when RFID is used in an assembly line of a factory, an operator is used on a machine if work instructions and assembly parts stored in the RFID are only displayed on a monitor connected to a reader. You may feel uncomfortable and your work may be less efficient.
The communication distance of RFID is about 1 m at most even if the antenna is enlarged. In some cases, it may be desirable to confirm the existence and contents of a parts box or the like from a longer distance.

Therefore, an object of the present invention is to obtain a display medium that can be integrated with an RFID and can record and erase (display) information like the RFID. In addition, the present invention solves the technical problems encountered when the display medium with RFID is put into practical use.
Other problems of the present invention will become apparent from the following description of the present invention.

The inventor considered the RFID and the display medium and obtained the following knowledge.
That is, the electromagnetic information recorded in the RFID tends to be considered to replace information (such as characters) that depends on human perception, but the electromagnetic information and the perceptual information complement each other. Information.
If the same information is displayed on the machine or the parts box by writing characters (including figures, colors, etc., the same applies below) on the machine and the parts box, the security of those who are in contact with the information (for example, workers) A higher sense of trust. In addition, the character information may be visible from a longer distance.

  On the other hand, RFID can record and erase information. In order to repeatedly use an integrated RFID / display medium, it is considered necessary to be able to record and erase text information as complementary information. Furthermore, taking into account the repeated use of RFID, the display medium needs to be integrated with and separated from the article.

  Therefore, the present invention selects a whiteboard sheet as a writing medium, integrates this with an RFID, and further has a function for adhering / removing this integral to an article, and a sticking / removing agent. A layer is formed.

  In one aspect of the present invention, the RFID-equipped writing sheet comprises a surface layer sheet having a writing layer on the surface of the first base sheet, an RFID inlay and a water-impermeable second base sheet, and the surface layer sheet is impermeable. It is water permeable, and the surface layer sheet and the second base material sheet have a planar region that is one or more times larger than the area of the inlay, and is between the back surface of the surface layer sheet and the surface of the second base material sheet. The inlay is sandwiched in a sealed state, and a sticking / removing agent layer having sticking and removability is formed on the back surface of the second base sheet.

  This writing sheet with RFID has an inlay sealed between impermeable sheets. For this reason, even if the writing surface is drained, the circuit module portion is not affected by water. In addition, since the writing sheet is attached to an object or the like with an adhesive / removable agent layer, it does not adversely affect the transmission and reception of electromagnetic waves between the RFID and the reader / writer, for example, when a magnet plate is used. .

  In a preferred embodiment of the writing sheet with RFID according to the present invention, even if a buffering base material is sandwiched at any position between the back surface of the first base material sheet and the sticking / removing agent layer in the laminated structure. Good.

  The buffer base material means a member having a certain thickness and having a certain softness. The surface of the object or the like to which the RFID-equipped writing sheet is attached is not limited to a flat surface, and may have a step, a wire mesh, or a resin mesh. The buffer base material keeps the writing surface in a constant flat state regardless of the surface state of the object. Therefore, the surface of the writing sheet with RFID according to this preferred embodiment is kept flat and writing is easier.

  In another preferred embodiment of the writing sheet with RFID according to the present invention, the sticking / removing agent layer is formed of a self-adhesive resin or can be washed with water, and can be reattached when dried after washing with water. It may be formed with an adhesive.

  The writing sheet with RFID according to the present preferred embodiment is a pressure-sensitive adhesive that can form an adhesive / removable agent layer with a self-adhesive resin, or can be washed with water and can be reattached when dried after washing with water ( (Hereinafter referred to as a washable adhesive). In factory assembly lines and the like, there are places where there is a lot of dust, and when affixed to the surface of a mesh-like article, foreign matter tends to adhere to the adhesive surface facing the opening of the mesh. In this preferred embodiment, both the front surface and the back surface of the writing sheet with RFID can be washed with water after the writing sheet with RFID is peeled from the article. At this time, the inlay is sealed in a water-impervious state, and even if washed with water, water does not enter the inlay and the inlay is not damaged. Foreign matters are removed from the exposed surface of the sticking / removing agent layer by washing with water on the back surface, and the adhesive strength of the surface is restored. At the same time, the written ink and the like are removed by washing the surface with water, and the written surface can be reused.

  The preferred embodiments of the present invention described above and the components included in the preferred embodiments can be implemented in combination as much as possible.

  According to the present invention, it is possible to obtain a writing sheet with an RFID that is integrated with an RFID, can record and erase display information, and can be easily attached to and detached from an article. If the writing sheet with RFID is used, the same information can be displayed by writing on a machine or a part box together with the electromagnetic information recorded on the RFID, and the security and reliability of those who come into contact with the information become higher. In addition, the character information may be visible from a longer distance, which has the effect of increasing the sense of security and reliability of those who come into contact with the information.

  Hereinafter, the RFID-equipped writing sheet according to the present invention will be further described with reference to the drawings. The dimensions, materials, shapes, relative positions, etc. of the members and parts described in the embodiments of the present invention are not intended to limit the scope of the present invention only to those unless otherwise specified. It is merely an illustrative example.

FIG. 1 is an explanatory view illustrating a state in which a writing sheet with RFID is used as an information display board of a component box.
The writing sheet with RFID 7 is attached to one side surface of the component box 71. The content of the parts is written on the surface of the writing sheet with RFID 7 with a felt pen for whiteboard. The RFID included in the writing sheet with RFID 7 stores the contents of parts and assembly information. The information is wirelessly transmitted to the monitor 72 with a reader / writer and displayed on the monitor 72. Reference numeral 73 denotes a machine that is being assembled. The operator can obtain detailed information on the monitor 72 and can know the outline of the parts from the character information written on the surface of the writing sheet 7 with RFID. Further, a person in charge of parts arrangement or the like can read the character information written on the surface of the writing sheet with RFID 7 from a remote position.

  When the work on the assembly line is changed, the writing sheet with RFID 7 can be removed and attached to another component box. At the same time, the RFID information can be rewritten electromagnetically, and the characters on the writing surface can be rewritten by writing (in some cases, printing means). The erasing of the writing surface can be performed in the same manner as the erasing of the written characters on a normal whiteboard, such as wiping with a cloth such as felt or wiping with water.

2 is an exploded perspective view for explaining the writing sheet 7 with RFID, and FIG. 3 is a sectional view for explaining the writing sheet 7 with RFID.
The writing sheet with RFID 7 is formed by laminating a surface layer sheet 1, an inlay 2, and a second base sheet 3 in this order.

  As the surface layer sheet 1, the same sheet as the sheet provided on the surface of the writing board which can be erased by wiping with a water-based or oil-based felt pen called a so-called white board can be used. If the color of the surface layer sheet is white, the writing felt pen is preferable from the viewpoint that most colors can be used. However, when a specific color is selected as the writing felt pen, the surface layer sheet may be a color other than white. For example, the surface layer sheet may be black and written using a white felt pen.

  The surface layer sheet 1 includes a first base sheet 11 and a writing layer 12. As a material of the first base sheet 11, polyester (for example, PET), polyethylene, polyvinyl chloride, polyvinylidene chloride, polycarbonate, polystyrene, polyacrylonitrile, nylon and the like can be used. Moreover, a biodegradable plastic (for example, L lactic acid resin) may be sufficient.

The thickness of the first base sheet is about 50 μm to 500 μm. If the above-described synthetic resin material is used, the surface layer sheet is practically impermeable at such a thickness.
The first base sheet 11 may be transparent or white.
The white first base sheet can be made by kneading a white pigment into the above-mentioned material. The transparent first base sheet can be used in the same manner as the white first base sheet by applying a paint containing a white pigment or overlapping the white sheets. Examples of the white sheet include foam films having innumerable holes and buffer base materials described below (for example, nonwoven fabrics and synthetic rubbers).

The writing layer 12 is provided for the purpose of facilitating erasure (easy erasure) because the writing ink does not penetrate into the layer of the base material sheet. The writing layer 12 is formed by curing a silane-based thermosetting resin or an acrylic UV-curable resin.
In order to attach the writing layer 12 to the surface of the first base material 11, the cured resin is directly applied on the first base material sheet 11 to be crosslinked and cured, or the above resin is applied to a transparent plastic film such as a polyester film. After applying and cross-linking and curing, the first base sheet 11 may be bonded via an adhesive.
The writing layer 12 may be embossed on the surface to impart antiglare properties, or fine silica powder may be dispersed in the writing layer.

Next, the inlay 2 will be described.
An antenna 21 formed by screen printing on a synthetic paper 23 having a thickness of 50 μm, which is a base film, is bonded using a conductive paste. An IC chip 22 is conductively fixed on the antenna 21 to produce a portion to be a circuit module. A protective layer (not shown) was formed on this circuit module with an EVA adhesive sheet having a thickness of 300 μm and a polyester film having a thickness of 50 μm. The inlay described above is an example, and even an inlay with another structure and manufacturing method can be used as the inlay of the present invention.

  There is no particular limitation on the plane area of the inlay. However, if the plane area of the inlay is increased, restrictions on circuit module design and manufacturing are reduced, and it is easy to increase the radio wave reach distance of RFID. For this reason, in the case of a rectangular inlay, the length of the short side is preferably set to 100 mm or more, and the plane area of the inlay is preferably relatively large. In the case of inlays with other shapes, it is preferable to have an equivalent planar area or more. For example, an inlay of 143 mm × 175 mm can be used (in this case, the entire writing sheet with RFID is, for example, A4 size).

  The material of the water-impermeable second base sheet 3 is not particularly limited, and a synthetic resin sheet, oil paper, rubberized cloth or the like having a thickness that is water-impermeable can be used. As a material of the synthetic resin sheet, polyester (for example, PET), polyethylene, polyvinyl chloride, polyvinylidene chloride, polycarbonate, polystyrene, polyacrylonitrile, nylon, or the like can be used. Moreover, a biodegradable plastic (for example, L lactic acid resin) may be sufficient.

  A sticking / removing agent layer 31 is formed on one surface of the second base sheet 3. The material for forming the sticking / removing agent layer 31 includes (1) self-adhesive resin, (2) washable adhesive (adhesive that can be washed with water and reattached when dried after washing), (3) A normal pressure-sensitive adhesive can be exemplified. Self-adhesive resins and washable adhesives are preferable materials from the viewpoint that the writing sheet with RFID can be washed with water after re-peeling and then re-adhered.

  The self-adhesive resin is also called a self-adhesive resin, and means a flexible resin having self-adhesion and weak surface adhesion. In other words, when the resin is a resin layer (adhesion / re-peeling agent layer 31), it can be easily adhered and adhered to the adherend due to adhesiveness and resin flexibility. In addition, once attached, it adheres to the adherend with a certain strength and does not easily peel off by simple rubbing, etc., but it can be easily done by peeling off the edge of the resin layer with a finger or the like. It means a resin capable of expressing a function capable of being peeled off. Accordingly, the self-adhesive resin is a flexible resin capable of exhibiting a function of being freely attachable / removable (detachable) when formed into a thin film such as a film or a sheet.

  Examples of the self-adhesive resin include polyolefin elastomers, polyethylene elastomers, polyurethane elastomers, silicon resins, butyl rubber, soft polyvinyl chloride, and fluorine resins. Such a self-adhesive resin has an advantage that self-adhesiveness can be easily recovered by washing with water when dust or the like adheres and the self-adhesiveness falls.

  As an example of a washable pressure-sensitive adhesive, as a component of a polyurethane pressure-sensitive adhesive composition, a diol component having an aromatic ring and a polyoxyalkylene group in the molecule and mainly composed of polyether diol and / or polyester diol, and polyether It is possible to use a polyol component (A) in which triol is blended at a predetermined ratio, and a polyisocyanate component (B) comprising an aliphatic or alicyclic polyisocyanate, or a prepolymer having an isocyanate group at the terminal using them. Examples thereof include a washing adhesive (Japanese Patent Laid-Open No. 2003-221570). Examples of other washable pressure-sensitive adhesives include (1) a radiation curable resin and (2) a polyethylene glycol compound having a cross-linked structure, and a polymer obtained by reaction by radiation irradiation as a main component. An example is a pressure-sensitive adhesive (Japanese Patent Laid-Open No. 7-228858).

  The normal pressure-sensitive adhesive means, for example, a pressure-sensitive pressure-sensitive adhesive that has been conventionally used as a pressure-sensitive adhesive for pressure-sensitive labels. Examples of such pressure-sensitive adhesives include known pressure-sensitive adhesives (for example, acrylic, rubber-based, urethane-based pressure-sensitive adhesives).

  The sticking / removing agent layer 31 is covered with a release paper 32. A known release sheet can be used as the release paper 32, and examples thereof include high-quality paper coated with a silicon resin, and a synthetic resin sheet coated with a fluorine resin.

  The surface layer sheet 1 and the second base material sheet 3 have a planar region that is one or more times larger than the area of the inlay 2, and the inlay 2 is provided between the back surface of the surface layer sheet 1 and the surface of the second base material sheet 3. Holding in a sealed state. 2 and 3, the peripheral region of the second base sheet 3 on which the inlay 2 is placed has paste margins 53, 54, 55, and 56. Also for the surface layer sheet 1, areas facing the adhesive margins 53, 54, 55, 56 of the second base sheet 3 are adhesive margins. The surface of the inlay 2 is covered with a water-impermeable surface layer sheet 1 and a second base sheet 3, respectively. At the end face portion of the inlay 2, the surface layer sheet 1 and the second base sheet 3 extended from the surface are bonded to each other in the adhesive margin region. For this reason, the inlay 2 is clamped in a sealed state and is water resistant.

  The inlay 2 may be capable of power transmission from the reader / writer, and may include a battery. If the inlay 2 can transmit power from the reader / writer, the inlay 2 does not require a battery. Accordingly, the inlay 2 can be thinned, and therefore, it becomes easier to impart water resistance by the above-described sealing. For power transmission, transmission using electromagnetic induction is usually used.

  The adhesive layers 51 and 52 are usually formed of an adhesive. As the adhesive, there can be used an adhesive (pressure-sensitive adhesive) such as an ultraviolet curable type, a thermosetting type, a solvent type, or an aqueous type that can obtain sufficient adhesive (adhesive) strength. Further, the adhesion between the layers can be replaced with other known adhesion means such as heat fusion or pressure-sensitive adhesive means.

  FIG. 4 is a cross-sectional explanatory view of the writing sheet with RFID 7a according to the modification. A nonwoven fabric 41 as a buffering base material is further laminated on the writing sheet with RFID 7 described in FIG. In the writing sheet with RFID 7a, the same members as those in the writing sheet with RFID 7 described with reference to FIG.

  In the writing sheet with RFID 7 a, a nonwoven fabric 41 is inserted between the second base material sheet 3 and the sticking / removing agent layer 31 with an adhesive layer 42 interposed therebetween. The nonwoven fabric 41 having a thickness of 1 mm was used. Although there is no restriction | limiting in particular in the thickness of a buffer base material, 100 micrometers-3 mm are preferable, More preferably, it is 0.5-2 mm. This is because, within this range, steps on the surface of the article can be easily absorbed, and operations such as pasting and removing are easy. In addition, when a buffer base material is interposed, the degree to which the inlay irregularities are allowed increases, and there is an effect that it is easy to adopt an RFID incorporating a battery.

  The adhesive layer 41 is formed of the same material as the adhesive layers 51 and 52. It is not limited to an adhesive, but can be replaced with a pressure-sensitive adhesive, and can be replaced with other known bonding means.

The nonwoven fabric 41 which is a buffer base material can be inserted between any of the lower surfaces of the first base material sheet 11 and the upper surface of the sticking / removing agent layer 31. For example, it may be inserted between the first base sheet 11 and the adhesive layer 51, or may be inserted between the inlay 2 and the adhesive layer 52.
The buffer base material is not limited to a non-woven fabric, and may be fiber fabric (regardless of natural fiber or synthetic fiber), rubber, foam or the like. The form of the fiber fabric may be any of woven fabric, knitted fabric, and nonwoven fabric.

  There is no particular limitation on the planar area of the writing sheets with RFID 7, 7a. However, it is preferable that the character written on the writing surface has a certain size or more according to the purpose of use from the viewpoint of easy visual recognition and interpretation. In general, if the size is A6 or larger, a certain amount of character information can be entered, and visual recognition is also facilitated. Preferably, it is A5 size or more. The upper limit of the plane size is not particularly limited, but is preferably A0 size or less from a practical viewpoint.

  In the writing sheet with RFID according to the present invention, a surface layer sheet, an inlay, a first base sheet, a second base sheet, and the like can be made of a flexible and flexible material. For this reason, even if the surface of the adherend (for example, a component box) is a curved surface, it can be attached without any trouble. Moreover, you may affix the RFID writing sheet | seat comprised from the said flexible and flexible raw material on the to-be-adhered body which is a plane. Furthermore, it is good also using a rigid raw material, and good also for plane sticking use.

  The RFID writing sheet according to the present invention may be used, for example, as a part box for assembling a factory machine or a machine in the middle of assembly, for displaying contents in a warehouse, or as a slip for goods transportation. is there.

It is explanatory drawing explaining the state which uses the sheet | seat for writing with RFID as an information display board of a component box. It is a disassembled perspective explanatory drawing explaining the sheet | seat 7 for writing with RFID. It is sectional explanatory drawing explaining the sheet | seat 7 for writing with RFID. It is sectional explanatory drawing of the sheet | seat 7a for writing with RFID concerning deformation | transformation implementation.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Surface layer sheet 2 Inlay 3 2nd base material sheet 7, 7a Writing sheet with RFID 11 1st base material sheet 12 Writing layer 21 Antenna 22 IC chip 23 Base film 31 Adhesion / removable agent layer 32 Release paper 41 Buffer Nonwoven fabric 42, 51, 52 Adhesive layer 53, 54, 55, 56 Adhesive margin 71 Parts box 72 Monitor with reader / writer 73 Machine in the middle of assembly

Claims (3)

It consists of a surface layer sheet having a writing layer on the surface of the first substrate sheet, an RFID inlay and a water-impermeable second substrate sheet,
The surface layer sheet is water-impermeable, and the surface layer sheet and the second base material sheet have a plane region that is one or more times larger than the area of the inlay, and the back surface of the surface layer sheet and the second base material sheet An RFID-equipped writing sheet having a laminated structure in which the inlay is held in a sealed state between the surfaces of the first substrate sheet, and an adhesive / removable agent layer having adhesion and re-peelability is formed on the back surface of the second base sheet.   The writing sheet with RFID according to claim 1, wherein a buffering base material is sandwiched at any position between the back surface of the first base material sheet and the sticking / removing agent layer in the laminated structure. The sticking / removing agent layer is formed of a self-adhesive resin or an adhesive that can be washed with water and can be reattached when dried after washing with water. Written sheet with RFID as described

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