JP4318357B2 - Non-contact data carrier sheet and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a non-contact data carrier sheet and a manufacturing method thereof. In particular, the present invention relates to a non-contact data carrier sheet that is easy to process after use, is thin, and has low production costs, and a method for manufacturing the same.
[0002]
[Prior art]
The contactless data carrier is considered to be used in various scenes today, and it is desired to simplify the manufacturing process, reduce the manufacturing cost, and reduce the thickness according to the demand. Further, there is a demand for easy handling or recycling of non-contact data carriers after use.
[0003]
Various information recording cards including magnetic cards, contact-type IC cards, and non-contact data carriers are made of plastic materials such as vinyl chloride, polyester, ethylene-vinyl acetate copolymer, and vinyl acetate-vinyl chloride copolymer. Is made as a substrate.
[0004]
Conventional non-contact data carriers are manufactured by forming a circuit on a substrate made of a plastic material, mounting an IC chip, and sealing with a laminate film through an adhesive.
[0005]
However, a card using such a plastic material requires a cutting process, a sealing process, an adhesive process, and the like in the manufacturing process, and the manufacturing is complicated and it is difficult to reduce the cost. It has also been difficult to provide thin cards.
[0006]
In order to solve such problems, Japanese Patent Application Laid-Open No. 11-48661 describes a method of manufacturing a non-contact data carrier for achieving a simplified manufacturing process, a reduction in manufacturing cost, and a reduction in thickness. ing. The manufacturing method described in this publication first manufactures a circuit module including an IC chip, non-contact communication means, that is, an antenna coil, and a lead frame. A non-contact IC card is manufactured by sealing both sides of the circuit module with a first laminate film provided with an adhesive layer, and further sealing both sides with a second laminate film provided with an adhesive. ing. This non-contact IC card is said to be a non-contact IC card that is thin, easy to manufacture and excellent in printability. Here, any plastic film can be used for the first laminate film and the second laminate film.
[0007]
However, in the above-described method, a plastic material is used as a laminate film even though a substrate is not used, and an adhesive is required when laminating a circuit module. Further, since the laminate film is used twice, the process is complicated and the cost is increased.
[0008]
Furthermore, after use, the contactless data carrier card must be completely destroyed or incinerated to prevent unauthorized use. However, a card material using a plastic material requires some kind of cutting machine to break the circuit, and when trying to incinerate, there is a problem that harmful gas is generated at the time of incineration.
[0009]
[Problems to be solved by the invention]
Therefore, there is a need for a thin contactless data carrier that can be easily processed or recycled after use, and that can be manufactured more easily at a lower cost, and a method for manufacturing the same. In the past, it was impossible or difficult to separate and separate cards manufactured from various materials such as metals, thermosetting resins, and thermoplastic resins. It is an object of the present invention to provide a non-contact data carrier sheet that can break a circuit and that can be easily separated and separated into each material, and a method of manufacturing the same.
[0010]
[Means for Solving the Problems]
In order to solve the problems as described above, the non-contact data carrier sheet of the present invention includes a water-soluble film having a circuit composed of a conductive material on the surface, and a coating layer provided on both surfaces of the water-soluble film. And has.
[0011]
The coating layer described above is preferably selected from the group consisting of paper, nonwoven fabric, and woven fabric.
[0012]
Moreover, a preferable water-soluble film is formed from polyvinyl alcohol, and this polyvinyl alcohol has a degree of polymerization of 100 to 6000 and a degree of saponification of preferably 70% or more.
[0013]
In addition, the method for producing the non-contact data carrier sheet of the present invention includes:
Forming a circuit using a conductive material on the surface of the water-soluble film;
Providing a coating layer on both sides of a water-soluble film having a circuit formed on the surface;
With
[0014]
Moreover, it is preferable that the process of providing the above-mentioned coating layer consists of laminating | stacking the coating layer of a wet state on both surfaces of the water-soluble film in which the circuit was formed, and drying.
[0015]
The covering layer is preferably selected from the group consisting of paper, non-woven fabric, and woven fabric.
[0016]
Hereinafter, the present invention will be described in more detail.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
An example of the non-contact data carrier sheet of the present invention is shown in FIGS. 1 (a) and 1 (b). As shown in FIG. 1A, the non-contact data carrier sheet has a structure in which a non-contact data carrier circuit in which a circuit 2 is formed on a water-soluble film 1 is laminated with a coating layer 3 from both sides. .
[0018]
Another example of the non-contact data carrier sheet is a non-contact data carrier in which a circuit 2 is formed on a water-soluble film 1 and an IC chip 4 is mounted at a predetermined position as shown in FIG. The circuit has a structure in which a coating layer 3 is laminated on both sides.
[0019]
Here, the water-soluble film 1 used in the present invention is formed from a water-soluble resin. Specific examples of the water-soluble resin include, but are not limited to, seaweed such as sodium alginate; fermentation mucilage such as bullulan and dextran; soluble starch, carboxy starch, British gum, dialdehyde starch, dextrin, and cation. Starches such as starch; celluloses such as viscose, methylcellulose, ethylcellulose, carboxymethylcellulose, hydroxyethylcellulose, and hydroxypropylcellulose; polyvinyl alcohol, polyethylene glycol, polypropylene glycol, polyethylene oxide, polyacrylamide, polyacrylic acid, polyvinylpyrrolidone, water-soluble Such as functional alkyd, polyvinyl ether, polymaleic acid copolymer, and polystyrene imine And the like inorganic polymer such as well as polyphosphoric acid soda and water glass; polymer.
[0020]
Among these, those having excellent film forming ability and film forming property, good film properties such as mechanical properties, and good suitability for secondary processing such as bag making and printing are preferable. Those having film-forming ability include polyvinyl alcohol, polyethylene oxide, starch (especially high amylose type), hydroxyethyl cellulose, carboxymethyl cellulose, methyl cellulose, hydroxypropyl cellulose, bullan, xanthan gum, sodium alginate, acrylic acid derivatives, and acrylic amides These water-soluble resins are preferred for use in the present invention. Polyvinyl alcohol is a particularly preferred water-soluble resin from the viewpoints of film-forming properties, printability for circuit formation, and no change in electrical resistance.
[0021]
These water-soluble resins have a degree of polymerization of 100 to 6000, preferably 300 to 4000. When the degree of polymerization is less than 100, the strength of the prepared film is insufficient, and the film may be torn during circuit formation. On the other hand, if the degree of polymerization is greater than 6000, the water solubility decreases, making it difficult to separate and separate the non-contact data carrier sheet into each material.
[0022]
Further, when the water-soluble resin is polyvinyl alcohol, the saponification degree is 70% or more, preferably 80 to 99%. If the saponification degree is less than 70%, the water solubility is poor, and it becomes difficult to separate and separate the non-contact data carrier sheet into each material.
[0023]
Although the thickness of the water-soluble film 1 formed from this water-soluble resin varies depending on the water-soluble resin used, it is typically 10 to 1000 μm, preferably 15 to 100 μm. If this thickness is less than 10 μm, the strength of the film is insufficient and the film may be torn during circuit formation.
[0024]
Examples of the coating layer 3 include paper; non-woven fabrics and woven fabrics made of rayon, polyester, polyolefin, nylon, and the like; plastic films such as polyethylene terephthalate film, ethylene vinyl acetate copolymer film, and polyethylene film; However, it is not limited to these. These coating layers 3 are preferably paper, non-woven fabric, and woven fabric with good dispersibility, particularly water permeability, in order to facilitate the process of separating and separating the non-contact data carrier sheet into each material. Of these, paper is preferable. By using such a coating layer, the disaggregation liquid easily passes through the coating layer not only from the end portion of the non-contact data carrier, so that the process of separating and separating the non-contact data carrier sheet into each material becomes easy. .
[0025]
The thickness of the coating layer 3 can be changed according to the coating layer material to be used and the purpose of use, but is preferably 20 to 2000 μm.
[0026]
Next, the manufacturing method of the non-contact data carrier sheet of this invention is demonstrated.
[0027]
First, a circuit is formed using a conductive material on the surface of a water-soluble film. Examples of the circuit forming method include conventionally used printing methods using conductive ink, die cutting of metal foils such as aluminum foil and copper foil, and vapor deposition treatment methods.
[0028]
A non-contact data carrier circuit may be formed by mounting an IC chip at a predetermined position on the obtained circuit as necessary.
[0029]
Subsequently, the coating layers 3 are provided on both surfaces of the water-soluble film on which the circuit is formed. When the film-like coating layer 3 is used, the coating layer 3 is laminated on both surfaces of the water-soluble film 1 and then applied at a temperature of room temperature to about 300 ° C. and a pressure of 1 kPa to 10 MPa for about 1 second to about 1 hour. Press.
[0030]
When the coating layer 3 in the wet state is used, the coating layer 3 is laminated on both surfaces of the water-soluble film 1 and then dried at a temperature of 50 to 200 ° C. for about 1 minute to about 1 hour.
[0031]
Here, for example, when paper is used as the coating layer, the wet state is a state where water is applied to the paper during the paper making process or to the paper made, and water is 5 to 500 parts by weight with respect to 100 parts by weight of the pulp. , Preferably 10 to 100 parts by weight.
[0032]
When the coating layer 3 in the wet state is used, after the coating layer 3 is laminated on both surfaces of the film 1 on which the non-contact data carrier circuit is formed, the water-soluble film dissolves and the water-soluble film is coated at the interface with the coating layer. Impregnated into. By doing in this way, the adhesiveness of a water-soluble film and a coating layer is improved, and it becomes unnecessary to use an adhesive agent.
[0033]
Further, as shown in FIG. 2, when the coating layer 3 is laminated, the coating layers 6 and 7 can be continuously laminated on the upper and lower sides of the water-soluble film 5 on which the predetermined circuit 2 is formed. . When this continuous method is used, a non-contact data carrier sheet can be produced with fewer steps while producing the coating layer 3.
[0034]
Furthermore, after using the non-contact data carrier sheet obtained in the present invention, the water-soluble film is dissolved by water, and each material is separated and separated.
[0035]
The conventional non-contact data carrier sheet uses a plastic material as a substrate, and it is impossible or difficult to separate into each material. However, the non-contact data carrier sheet based on the present invention can be easily disassembled and recycled by using a water-soluble film instead of the substrate. In addition, simplification of the manufacturing process, reduction in production cost, and thinning of the non-contact data carrier sheet could be achieved.
[0036]
The present invention will be described below with reference to examples, but the present invention is not limited to the examples.
[0037]
【Example】
[Example 1]
A circuit pattern made of an aluminum foil having a thickness of 50 μm was bonded to a hydroxypropyl cellulose film having a length of 6 cm, a width of 9 cm and a thickness of 15 μm as a water-soluble film with a polyester adhesive. Subsequently, a Philips Myfare IC chip was joined to the predetermined position with an anisotropic conductive film to form a non-contact data carrier circuit.
[0038]
Next, the obtained non-contact data carrier circuit is sandwiched between two ethylene vinyl acetate copolymer films having a thickness of 500 μm as a coating layer, and the pressure is increased at 120 ° C. and a pressure of 1 MPa for 10 minutes. A data carrier sheet was obtained.
[0039]
When the operation of the obtained non-contact data carrier sheet was confirmed with a reader dedicated to Myfair manufactured by Philips, it was possible to read and write data.
[0040]
Further, 10 non-contact data carrier sheets obtained were put into 10 liters of water and stirred for 48 hours. After the stirring, the non-contact data carrier sheet was observed and separated into an ethylene vinyl acetate copolymer film, an aluminum foil, and an IC chip.
[0041]
[Example 2]
A circuit pattern made of a copper foil having a thickness of 38 μm was bonded to a polyacrylic acid film having a length of 6 cm, a width of 9 cm and a thickness of 15 μm as a water-soluble film with a polyester adhesive. Subsequently, a Philips Myfare IC chip was joined to the predetermined position with an anisotropic conductive film to form a non-contact data carrier circuit.
[0042]
Next, the obtained non-contact data carrier circuit is sandwiched between two sheets of polypropylene nonwoven fabric having a weight of 30 g / cm ² as a coating layer, and pressurized at 120 ° C. with a pressure of 1 MPa for 10 minutes. Got.
[0043]
When the operation of the non-contact data carrier sheet obtained in this way was checked with a reader dedicated to Myfair manufactured by Philips, it was possible to read and write data.
[0044]
Further, 10 non-contact data carrier sheets obtained were placed in 10 liters of water and stirred for 2 hours. After the stirring, the non-contact data carrier sheet was observed and separated into a nonwoven fabric, a copper foil, and an IC chip.
[0045]
[Example 3]
A circuit pattern made of urethane-coated conductive wire having a thickness of 0.2 mm was bonded to a polyvinyl alcohol film (polymerization degree 500, saponification degree 98%) having a length of 6 cm, a width of 9 cm, and a thickness of 15 μm as a water-soluble film. Subsequently, a Philips Myfare IC chip was joined to a predetermined place of the film using an anisotropic conductive film to form a non-contact data carrier circuit.
[0046]
To 100 parts by weight of wood pulp in which NBKP (softwood bleached kraft pulp) and LBKP (hardwood bleached kraft pulp) were mixed at 20:80, rosin sizing agent 0.5 parts by weight, sulfuric acid band 2 parts by weight and water were added. The stock solution was adjusted.
[0047]
100 parts by weight of the wood pulp of the stock solution was subjected to water squeezing treatment on a 100-mesh stainless steel wire until water became 60 parts by weight, to prepare a hydrous paper having a thickness of 50 μm as a coating layer . Next, the non-contact data carrier circuit was inserted between the two sheets of water-containing paper, pressurized and squeezed with a rubber roller, and then heated and dried at 130 ° C. for 10 minutes to obtain a non-contact data carrier sheet. .
[0048]
When the operation of the obtained non-contact data carrier sheet was confirmed with a reader dedicated to Myfair manufactured by Philips, it was possible to read and write data.
[0049]
Further, 10 non-contact data carrier sheets obtained were put into 10 liters of water and stirred for 30 minutes. After the stirring, the non-contact data carrier sheet was observed and separated into pulp, urethane-coated copper wire, and IC chip.
[0050]
[Example 4]
On a polyvinyl alcohol film (polymerization degree 3500, saponification degree 80%) having a length of 6 cm, a width of 9 cm and a thickness of 15 μm as a water-soluble film, a circuit pattern functioning as a coil was printed with a polyester-based conductive ink mainly composed of silver. . Next, a Myfair IC chip manufactured by Philips was bonded to a predetermined position of the film using an anisotropic conductive film to form a non-contact data carrier circuit.
[0051]
Mixing 0.5 parts by weight of rosin sizing agent and 2 parts by weight of sulfuric acid band with 100 parts by weight of wood pulp (NBKP / LBKP = 20/80) to adjust the stock solution, and using a long net type paper machine, A paper weighing 40 g / m ² was produced.
[0052]
About 40 g / m ² of water was sprayed onto the surface of the paper to form a coating layer, which was then coated on the non-contact data carrier circuit to obtain a non-contact data carrier sheet.
[0053]
When the operation of the obtained non-contact data carrier sheet was confirmed with a reader dedicated to Myfair manufactured by Philips, it was possible to read and write data.
[0054]
In addition, 10 non-contact data carrier sheets obtained were placed in 10 liters of water and stirred for 30 minutes. After the stirring, the non-contact data carrier sheet was observed and separated into pulp, conductive ink particles, and IC chip.
[0055]
【The invention's effect】
The non-contact data carrier sheet in the present invention can be easily decomposed with water by using a water-soluble film as a circuit board, can be easily processed after use, and can be recycled. Furthermore, the manufacturing process becomes easier, and a non-contact data carrier sheet that is inexpensive and can be mass-produced becomes available.
[Brief description of the drawings]
1A and 1B are schematic cross-sectional views of the structure of a non-contact data carrier sheet according to the present invention.
FIG. 2 is a schematic diagram illustrating a continuous manufacturing method of a non-contact data carrier sheet according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Water-soluble film 2 Circuit 3 Coating layer 4 IC chip 5 Water-soluble film 6 and 7 which formed the non-contact data carrier circuit Coating layer

Claims (6)

A non-contact data carrier sheet comprising a water-soluble film having a circuit formed of a conductive material on a surface thereof, and a coating layer provided on both surfaces of the water-soluble film. Carrier sheet. The contactless data carrier sheet according to claim 1, wherein the coating layer is selected from the group consisting of paper, nonwoven fabric, and woven fabric. The non-contact data carrier sheet according to claim 1, wherein the water-soluble film is formed of polyvinyl alcohol. The non-contact data carrier sheet according to claim 3, wherein the polyvinyl alcohol has a polymerization degree of 100 to 6000 and a saponification degree of 70% or more. A method of manufacturing a non-contact data carrier sheet,
Forming a circuit using a conductive material on the surface of the water-soluble film;
Providing a coating layer on both sides of a water-soluble film having a circuit formed on the surface;
A method of manufacturing a non-contact data carrier sheet, comprising: The non-contact data carrier sheet manufacturing method according to claim 5, wherein the step of providing the coating layer comprises laminating a wet coating layer on both sides of the water-soluble film on which the circuit is formed and drying. Method.

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