JP2011000715A - Method for manufacturing card - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a card allowing the direction of a raw card to be surely indicated while eliminating its trace without leaving it and moreover having no risk of damaging the card in this elimination.SOLUTION: The card is manufactured by laminating two or more sheets. At this time, prior to sticking the sheets to each other, a coloring agent decolored by heating is applied to color a position deviated from the center of the card in a plan view and exposed to the side edge face of the card on the face which is not to be the surface when made into the card. This coloring comprises a reversible coloring agent decolored by heating, and can be decolored by heating to eliminate its trace after confirming the direction of the raw card.

Description

  The present invention relates to a method for manufacturing a card constituted by bonding front and back sheets to each other. The present invention can be applied to, for example, a non-contact type IC card configured by laminating these front and back sheets with an inlet interposed therebetween.

  For example, a non-contact type IC card is manufactured through a process as shown in FIG. That is, in FIG. 7, first, a top sheet, a front core sheet, an inlet mounted with an IC chip and an antenna, a back core sheet, and a back sheet are stacked in order from the top. The inlet is provided with an IC chip that is provided with an antenna coil made of copper or aluminum on an electrically insulating base sheet and electrically connected to the antenna coil. The front core sheet is provided with an opening for storing the IC chip. These are bonded together to produce a non-contact type IC card. In general, the IC chip is arranged at a biased position avoiding the center of the card. By arranging the IC chip at a biased position, breakage due to the stress is prevented when the card is bent. Although a single IC card is shown in FIG. 7, in practice, as shown in FIG. 7, these non-contact type IC cards are manufactured with multiple faces and then cut along the outer shape of the card. And individual cards are manufactured.

  By the way, the IC card manufactured in this way is a raw card in which no application software is recorded yet and the surface is not printed. Therefore, next, the collected raw cards are taken out one by one, application software and individual data are recorded, printed, and issued as an application card.

  By the way, since the surface of the raw card is not printed, the front and back cannot be distinguished from the appearance. Similarly, the left and right sides or top and bottom (up and down) could not be distinguished.

  Therefore, a method is known in which the end of each raw card is provided with a notch at a biased position and the direction thereof is distinguished. In addition, there is a method of embossing a part of the card and distinguishing the card orientation by the embossing. There is also a method in which a part is printed to indicate its orientation. However, according to any of these methods, there is a possibility that the trace remains on the issued card.

  Therefore, Patent Document 1 proposes a method of applying a mark to the top sheet or the back sheet using a fluorescent paint, detecting the orientation at the time of issuance, and removing the mark. As a removal method, for example, there is a method of scraping off the mark or wiping with a solvent.

JP 2002-96587 A

  However, according to the method of Patent Document 1, not only the number of steps is increased in order to remove the mark, but also there is a problem that the surface of the card is easily damaged because the mark is scraped off or wiped off with a solvent. It was.

  Therefore, the present invention can reliably indicate the orientation of the raw card as described above, can be removed without leaving a trace thereof, and the card can be manufactured without damaging the card in the removal. The purpose is to provide.

That is, the invention according to claim 1 is a method for manufacturing a card configured by bonding two or more sheets together.
Before the sheets are bonded together, a colorant that does not become a surface when it is made into a card, is exposed on the side edge surface of the card and is deviated from the center of the card in plan view, and is decolored by heating. A coloring process for applying and coloring;
After this coloring step, a bonding step of manufacturing the card by bonding the sheets,
It is a manufacturing method of the card | curd characterized by providing.

  According to the present invention, the colored portion is exposed on the side edge surface of the card, and the colored portion is exposed on the card side edge surface that is offset from the center of the card in plan view. The direction can be confirmed.

  And since it erases by heating after confirming the direction of a card, the trace is not left. Further, the color can be erased by heating, and there is no possibility of damaging the card surface because it is not physically scraped off or a solvent is used.

Next, the invention according to claim 2 is a method of manufacturing a card configured by bonding two or more sheets together.
Before the sheets are bonded to each other, it is a surface that does not become the surface when it is made into a card, and is exposed to the side edge surface of the card and is offset from the center of the card in a plan view. A coloring step of coloring by applying a reversible colorant that repeats color; and
After this coloring step, a bonding step of manufacturing the card by bonding the sheets,
A color development step of heating the card to develop the reversible colorant;
It is a manufacturing method of the card | curd characterized by providing.

  According to the present invention, even when the color is erased in the step of pasting the cards, it is possible to confirm the direction by developing the color by heating.

  Next, the invention according to claims 3 and 4 relates to a method of manufacturing a card by imposing multiple faces.

That is, the invention according to claim 3 is a method of manufacturing a card having a multifaceted structure in which two or more sheets are bonded together.
A surface that does not become a surface when it is made into a card before the sheets are bonded to each other, and is exposed to the side edge surface of each card when it is cut into individual cards and is offset from the center of the card in plan view In addition, a coloring step of coloring by applying a colorant that is erased by heating,
After this coloring step, a bonding step of manufacturing the card by bonding the sheets,
Cutting to individual cards, and the coloring step to expose the colored portion on the side edge surface of each card,
It is a manufacturing method of the card | curd characterized by providing.

Further, the invention according to claim 4 is a method for manufacturing a multi-sided card formed by bonding two or more sheets together.
Before pasting the sheets together, it is a surface that does not become the surface when it is made into a card,
A reversible colorant that repeats coloring and decoloring by controlling heating conditions is applied to the position exposed on the side edge of each card when it is cut into individual cards and offset from the center of the card in plan view. A coloring process for coloring
After this coloring step, a bonding step of manufacturing the card by bonding the sheets,
Cutting to individual cards, and the coloring step to expose the colored portion on the side edge surface of each card,
A color development step of heating the card to develop the reversible colorant;
It is a manufacturing method of the card | curd characterized by providing.

  Next, the invention according to claim 5 is the card manufacturing method according to any one of claims 1 to 4, wherein the colorant is applied using a dispenser.

  According to the invention of claim 5, since the colorant is applied using a dispenser, the colorant can be selectively and accurately applied to the position. For this reason, for example, even when a card is manufactured with multiple faces, it can be reliably applied to a position that is exposed on the side edge surface of each card and is offset from the center of the card in plan view. The position can be left uncolored.

  As described above, according to the present invention, it is possible to reliably indicate the orientation of the raw card, to remove the trace, and to bring about the effect that the card is not damaged in the removal.

Sectional explanatory drawing concerning the Example of this invention The perspective view which concerns on the Example of this invention Explanatory drawing which shows the positional relationship of the card | curd and coloring part in the case of manufacturing by multiple imposition Sectional explanatory drawing which concerns on 2nd Example of this invention. Cross-sectional explanatory drawing according to the third embodiment of the present invention Cross-sectional explanatory drawing according to a conventional example Explanatory drawing which shows the positional relationship of the card | curd in the case of manufacturing by multiple imposition

  The card of the present invention is constituted by adhering at least two sheets as essential constituent elements. In addition, a third sheet may be provided between these two sheets.

  The inside of this card, that is, the inside that does not constitute both surfaces of the card, is colored at the end by a colorant that is erased by heating. The colored portion may be an inner surface side of the two sheets, that is, a surface to be bonded. Moreover, the edge part of the 3rd sheet interposed between these two sheets may be sufficient.

  Any sheet can be used for coloring the end portions. For example, in the case of a non-contact type IC card, end portions such as a top sheet, a front core sheet, an inlet, a back core sheet, and a back sheet can be colored. In addition to these, a sheet material colored at the end may be prepared, and this sheet material may be disposed between the top sheet and the back sheet in addition to the core sheet and the inlet. In this case, it is desirable to prepare a tape-like elongated sheet material as the sheet material.

Next, the colored end portion needs to be exposed on the side edge surface of the card, and needs to be exposed at a position deviated from the center of the card in plan view. If the card is exposed all around the side edge surface of the card, the front and back of the card and the front and back cannot be identified using this colored portion as a clue. Also, even when the card is exposed in the center in plan view, it is difficult to identify the front and back.

  For this reason, this coloring part is usually one place. However, even if a plurality of positions are colored, if the plurality of positions are asymmetric positions in plan view, it is possible to identify the front and back sides and the front and rear sides of the card.

  And this coloring is possible by applying the said coloring agent to the said site | part of a sheet | seat. In applying this colorant, a dispenser can be used. And when applying the said colorant using a dispenser, it becomes possible to apply a colorant selectively and correctly to the said position.

  FIG. 1 of the drawings is an example of a non-contact type IC card using a core sheet disposed on the back surface side as the sheet material, and for convenience of explanation, the sheets are shown separately. In this example, a top sheet, a front core sheet, an inlet, a back core sheet, and a back sheet are laminated in order from the top, and these can be bonded together to form an IC card. And the reversible coloring layer is given to the edge part of the inlet side surface at the back side core sheet. A perspective view of the IC card thus obtained is shown in FIG. That is, the front sheet of the IC card is not printed, and is not applied to the back sheet. And the said reversible coloring layer is exposed to a part of the side edge surface. The exposed part is a part of the long side of the IC card, and is a position biased away from the center of the card in plan view.

  Known materials can be used for these sheets as they are. For example, biaxially stretched polyethylene terephthalate can be used as the top sheet and the back sheet. Further, as the front core sheet, for example, an electrically insulating sheet such as a hard vinyl chloride (PVC) sheet can be used. Moreover, it is also possible to use amorphous polyester (for example, Eastsr PET-G: terephthalic acid, glycol, 1,4 cyclohexanedimethanol copolymer manufactured by Eastman Chemical Co., Ltd.) as the front core sheet. In addition, it is necessary to provide the opening part which accommodates the IC chip mounted in the inlet in the front side core sheet. As shown in the figure, the opening may be configured by a hole penetrating the front core sheet, or a recess may be provided in the front core sheet and the recess may be used as the opening. Further, the inlet is an IC chip on an electrically insulating sheet base material, a reinforcing plate for sealing the IC chip and improving the physical strength of the IC chip, an antenna coil, and these IC chip and antenna. A circuit for electrically connecting the coil is provided, and a film such as polyethylene terephthalate, polyethylene naphthalate, or polyimide can be used as the sheet base material.

  And this card | curd can be manufactured according to the following process. That is, it is a coloring process in which a colorant is first applied to the position of the sheet for coloring. And after this coloring process, it is the bonding process which bonds each sheet together and manufactures a card | curd. In the case where a reversible colorant that repeats color development and decoloration by controlling heating conditions is used as the colorant, the colored portion can be colored by heating the card after the bonding step. it can. When there is a card in which the colored portion has been decolored during the bonding step, the direction can be confirmed by coloring the colored portion. Note that the cards can be heated, for example, by heating them together in a state where a large number of cards are stacked.

Next, FIG. 3 of the drawings is an explanatory diagram when the card is manufactured with multiple faces, and shows the positional relationship between a plurality of cards and their colored portions. That is, when manufacturing with multi-sided attachment, the card is multi-faced on the sheet, and a colored portion is provided across the outline of the card. Can be exposed to the surface. Then, by applying the colorant using a dispenser, it is possible to selectively and accurately apply the colorant to this position and leave the other positions uncolored. In addition, when manufacturing an IC card with multi-sided attachment, an IC chip mounted on the inlet is subjected to a communication inspection before the coloring step, and the IC card that has passed the communication inspection and the like is distinguished and colored. can do. For example, select a successful IC card and color it only, or make the colored part of the accepted IC card different from the colored part of the rejected IC card, or set the number and size of the colored parts to each other. You can distinguish them by making them different. In the case where the multiple IC cards thus multifaceted are colored separately, coloring with a dispenser is preferable.

  And when manufacturing a card with multi-sided attachment, in addition to the coloring step and the bonding step, a cutting step is performed in which each colored card is cut to expose the colored portion on the side edge surface of each card. Is possible. When a reversible colorant that repeats color development and decoloration by controlling heating conditions is used as the colorant, the card can be heated to cause color development after the cutting step.

  Next, FIG. 4 of the drawing is an example of a non-contact type IC card using an inlet as the sheet material, and the rest is the same as the example shown in FIG. In this example, the reversible coloring layer is given to the edge part by the side of the back side core sheet of the sheet base material which constitutes an inlet. And the said reversible coloring layer is exposed to a part of the side edge surface. The exposed part is a part of the long side of the IC card, as in the example shown in FIG. 1, and is a position biased away from the center of the card in plan view. When manufacturing this IC card, it is desirable to print a reversible colored layer on the sheet base material, and then mount an IC chip.

  Further, FIG. 5 of the drawing shows that a sheet material is prepared separately from the top sheet, the front core sheet, the inlet, the back core sheet, and the back sheet, and a reversible coloring layer is applied to the end portion of the sheet material. And the back side core sheet.

  Next, the reversible colored layer will be described. The reversible colored layer may be any layer that can be decolored by heating and the trace disappears. However, a layer that repeats coloring and decoloring by controlling the heating conditions is desirable. In this case, even if there is a decolored raw card, this raw card can be heated and colored to check its orientation.

  Examples of the colorant that repeats color development and decolorization include a leuco dye and a reversible colorant mainly composed of an agent that develops or decolors the leuco dye according to the control of heating conditions. Can be used. The properties of this leuco reversible colorant are generally explained as follows. That is, the color develops when heated to a relatively high temperature, and the colored state is maintained even when cooled to room temperature. Further, the color is erased when heated to a temperature lower than the color developing temperature, and the color erased state is maintained even when it is cooled to room temperature. The leuco reversible colorant may be described as follows. That is, when heated, the color develops, and when rapidly cooled, the color developed state is maintained. In addition, after heating, when slowly cooled, the color disappears and the decolored state is maintained. In any case, when it is heated to a relatively high temperature, it develops color, and when it is rapidly cooled to room temperature, the colored state is maintained. In addition, when it is heated to a temperature lower than the color development temperature and is slowly cooled, it is decolored and maintains its decolored state. For this reason, both the colored state and the decolored state can be stably maintained at room temperature.

Any leuco dye can be used. For example, leucooramines, diarylphthalides, polyarylcarbinols, acyloramines, arylolamines, rhodamine B lactams, indolines, spiropyrans, fluorans and the like. Specifically, crystal violet lactone, malachite green lactone, 2-anilino-6- (N-cyclohexyl-N-methylamino) -3-methylfluorane, 2-anilino-3-methyl- (N-methyl- N-propylamino) fluorane, 3- [4- (4-phenylaminophenyl) aminophenyl] amino-6-methyl-7-chlorofuran, 2-anilino-6- (N-methyl-N-isobutylamino)- 3-methylfluorane, 2-anilino-6- (dibutylamino) -3-methylfluorane, 3-chloro-6- (cyclohexylamino) fluorane, 2-chloro-6- (diethylamino) fluorane, 7- (N , N-dibenzylamino) -3- (N, N-ethylamino) fluorane, 3,6-bis (diethylamino) fluorine -Γ- (4′-nitro) anilinolactam, 3-diethylaminobenzo [a] -fluorane, 3-diethylamino-6-methyl-7-aminofluorane, 3-diethylamino-7-xylinofluorane, 3 -(4-Diethylamino-2-esoxyphenyl) -3- (1-ethyl-2-methylindol-3-yl) -4-azaphthalide, 3- (4-diethylaminophenyl) -3- (1-ethyl- 2-methylindol-3-yl) phthalide, 3-diethylamino-7-chloroanilinofluorane, 3-diethylamino-7,8-benzofluorane, 3,3-bis (1-n-butyl-2-methyl) Indol-3-yl) phthalide, 3,6-dimethylethoxyfluorane, 3-diethylamino-6-methoxy-7-aminofluorane, DEP , ATP, ETAC, 2- (2-chloroanilino) -6-dibutylaminofluorane, crystal violet carbinol, malachite green carbinol, N- (2,3-dichlorophenyl) leucooramine, N-benzoylolamine, rhodamine B-lactam, N-acetylauramine, N-phenyloramine, 2- (phenyliminoethanedilidene) -3,3-dimethylindoline, n-3,3-trimethylindolinobenzospiropyran, 8'-methoxy-N -3,3-trimethylindolinobenzospiropyran, 3-diethylamino-6-methyl-7-chlorofluorane, 3-diethylamino-7-methoxyfluorane, 3-diethylamino-6-benzyloxyfluorane, 1,2-benz -6-diethylaminofluor Emissions, 3,6-di -p- toluidino-4,5-dimethyl fluoran, phenyl hydrazide -γ- lactam, 3-amino-5-methyl fluoran can be exemplified.

  In addition, as the drug used for the leuco reversible colorant, a compound having a chemical structure shown in Chemical Formula 1 can be used.

(Wherein X represents a phenolic hydroxyl group or carboxyl group, and R represents a hydrogen atom or hydroxyl group)
For example, a compound having a chemical structure shown in Chemical Formula 2 or a compound having a chemical structure shown in Chemical Formula 3 is used.

(Wherein X represents a phenolic hydroxyl group or a carboxyl group)

Specific examples of the aminophenol or aminobenzoic acid represented by Chemical Formula 2 include aminophenols such as 2-aminophenol, 3-aminophenol, and 4-aminophenol, 2-aminobenzoic acid, and 3-aminobenzoic acid. And aminobenzoic acid such as 4-aminobenzoic acid.

Examples of the hydroxyaminobenzoic acid represented by Chemical Formula 3 include 2-hydroxy-3-aminobenzoic acid, 2-amino-3-hydroxybenzoic acid, 2-amino-4-hydroxybenzoic acid, and 2-hydroxy-4. -Aminobenzoic acid, 2-hydroxy-6-aminobenzoic acid,
Examples thereof include 3-amino-4-hydroxybenzoic acid and 3-hydroxy-5-aminobenzoic acid.

  Examples of the drug include a compound having a chemical structure shown in Chemical Formula 4 or a compound having a chemical structure shown in Chemical Formula 5 and an amine.

(Where n represents an integer of 1 to 3)

(Wherein R ₁ represents a hydrogen atom or a methyl group, and n ₁ represents an integer of 0 to 6)
Specific examples of the compound represented by Chemical Formula 4 include the following.

  n = 1; 2-hydroxybenzoic acid, 3-hydroxybenzoic acid, 4-hydroxybenzoic acid and the like.

  n = 2; 3,4-dihydroxybenzoic acid, 3,5-dihydroxybenzoic acid, 2,3-dihydroxybenzoic acid, 2,4-dihydroxybenzoic acid, 2,5-dihydroxybenzoic acid, 2,6-dihydroxybenzoic acid Acids, 3,6-dihydroxybenzoic acid, 4,5-dihydroxybenzoic acid, 4,6-dihydroxybenzoic acid, 4-hydroxysalicylic acid, 5-hydroxysalicylic acid and the like.

  n = 3; gallic acid and the like.

  Specific examples of the compound represented by Chemical Formula 5 include the following.

  2,2-bis (4-hydroxyphenyl) ethanoic acid, 2,2-bis (4-hydroxyphenyl) propionic acid, 3,3-bis (4-hydroxyphenyl) propionic acid, 4,4-bis (4- Hydroxyphenyl) butanoic acid, 4,4-bis (4-hydroxyphenyl) heptanoic acid, 5,5-bis (4-hydroxyphenyl) pentanoic acid, 5,5-bis (4-hydroxyphenyl) hexanoic acid, 6, 6-bis (4-hydroxyphenyl) heptanoic acid, 7,7-bis (4-hydroxyphenyl) heptanoic acid, 8,8-bis (4-hydroxyphenyl) octanoic acid, 7,7-bis (4-hydroxyphenyl) ) Octanoic acid, 8,8-bis (4-hydroxyphenyl) nonanoic acid.

Next, as the amine that reacts with the compound having the chemical structure shown in Chemical Formula 4 or the compound having the chemical structure shown in Chemical Formula 5, R ₂ NH ₂ (where R ₂ represents an alkyl group having 8 or more carbon atoms). ) Or a compound having the chemical structure shown in Chemical Formula 6 can be exemplified.

(Wherein R ₃ represents a hydrogen atom, an alkyl group, a halogen atom or an alkoxy group, and n ₂ represents an integer of 1 to 18)
Specific examples of the amine represented by R ₂ NH ₂ include octylamine, nonylamine, decylamine, undecylamine, laurylamine, tridecylamine, tetradecylamine, pentadecylamine, heptadecylamine, cetylamine, and stearylamine. Hexylamine, heptylamine and the like. Specific examples of the amine represented by Chemical Formula 6 include benzylamine, 2-phenylethylamine, 3-phenylpropylamine, 4-phenylbutylamine, 5-phenylpentylamine, 6-phenylhexylamine, and 7-phenylheptylamine. , 8-phenyloctylamine, 9-phenylnonylamine, 10-phenyldecylamine, 11-phenylundecylamine, 12-phenyldodecylamine, 13-phenyltridecylamine, 14-phenyltetradecylamine, 15-phenylpenta Decylamine, 16-phenylhexadecylamine, 17-phenylheptadecylamine, 18-phenyloctadecylamine, methylbenzylamine, 2-triethylamine, 3-tolylpropylamine, 4-tolylbutylamine 5-tolylpentylamine, 6-tolylhexylamine, 7-tolylheptylamine, 8-tolyloctylamine, 9-tolylnonylamine, 10-tolyldecylamine, 11-tolylundecylamine, 12-tolyldecylamine, 13 -Tolyltridecylamine, 14-tolyltetradecylamine, 15-tolylpentadecylamine, 16-tolylhexadecylamine, 17-tolylheptadecylamine, 18-tolyloctadecylamine, chlorobenzylamine, 2-chlorophenylethylamine, bromo Examples include benzylamine, 2-bromophenylethylamine, methoxybenzylamine, ethoxybenzylamine and the like.

  In the present invention, the drug includes a compound of dihydroxybenzoic acid having a chemical structure shown in Chemical Formula 7 and a higher aliphatic amine having an alkyl group having 8 or more carbon atoms, and a higher gallic acid having a chemical structure shown in Chemical Formula 8. A compound with an aliphatic amine, a hydroxybenzoic acid having a chemical structure shown in Chemical Formula 9, or a compound with a dihydroxybenzoic acid, a compound of gallic acid and an aliphatic amine having a chemical structure shown in Chemical Formula 10, and a chemistry shown in Chemical Formula 11 Bis (hydroxyphenyl) acetic acid having a structure, or a compound of bis (hydroxyphenyl) butyric acid and a higher aliphatic amine, an aliphatic carboxylic acid having two hydroxyphenyl groups having a chemical structure shown in Chemical formula 12, and an aliphatic amine And a compound of a gallic acid ester having a chemical structure shown in Chemical Formula 13 and a higher aliphatic amine.

(Wherein R ₄ represents an alkyl group having 8 or more carbon atoms)

(Wherein R ₅ represents an alkyl group having 8 or more carbon atoms)

(Wherein R ₆ represents a hydrogen atom, an alkyl group, a halogen atom, or an alkoxy group, n ₂ represents 1 or 2, and n ₃ represents an integer of 1 to 18)

(Wherein R ₇ represents a hydrogen atom, an alkyl group, a halogen atom or an alkoxy group, and n ₄ represents an integer of 1 to 18)

(Wherein R ₈ represents a hydrogen atom or a methyl group, and R ₉ represents an alkyl group having 8 or more carbon atoms)

(Wherein R ₁₀ represents a hydrogen atom or a methyl group, R ₁₁ represents a hydrogen atom, an alkyl group, a halogen atom or an alkoxy group, n ₅ represents an integer of 0 to 6, and n ₆ represents an integer of 1 to 18)

(However, R ₁₂ and R ₁₃ each represent an alkyl group having 8 or more carbon atoms.)
Moreover, it is also possible to use the compound which has a chemical structure shown to Chemical formula 14-Chemical formula 17 as said chemical | medical agent.

These leuco dyes and chemicals can be dissolved or dispersed in a solvent together with an appropriate binder and printed on the sheet material.

  Next, a card processing method according to the present invention will be described.

  As described above, the card according to the present invention has the reversible colored layer exposed at a part of the side edge surface. For this reason, even in a state where a large number of cards according to the present invention are stacked and stacked, it is possible to confirm the orientation of the cards one by one only by looking at the side surface with the naked eye. In addition, this reversible coloring layer can be made to color by the heat | fever at the time of laminating the said each sheet | seat which comprises this card | curd by heat-pressing. In the case where the color does not develop due to this heat, or when the layers are laminated without applying heat, for example, when the layers are laminated using an adhesive, the color can be developed by heating thereafter. In addition, it is desirable that the card is heated in a state of being accumulated in a state in which the cards are stacked and color is developed immediately before confirming the orientation of the card. In this way, it is possible to prevent omission of confirmation by color development in a lump.

  And after confirming the direction of a card | curd, these cards can be processed by aligning in a predetermined direction and throwing into a processing apparatus. For example, printing or embossing on the card surface. When the card is an IC card, it can be electrically recorded on the IC chip, and when it is a magnetic card, it can be magnetically recorded.

  The present invention has been described above by taking a non-contact type IC card as an example. However, the present invention is not limited to this, and can be applied to a contact type IC card, a magnetic card, and other cards.

Claims (5)

In a method of manufacturing a card configured by bonding two or more sheets together,
Before the sheets are bonded together, a colorant that does not become a surface when it is made into a card, is exposed on the side edge surface of the card and is deviated from the center of the card in plan view, and is decolored by heating. A coloring process for applying and coloring;
After this coloring step, a bonding step of manufacturing the card by bonding the sheets,
A card manufacturing method comprising: In a method of manufacturing a card configured by bonding two or more sheets together,
Before the sheets are bonded to each other, it is a surface that does not become the surface when it is made into a card, and is exposed to the side edge surface of the card and is offset from the center of the card in a plan view. A coloring step of coloring by applying a reversible colorant that repeats color; and
After this coloring step, a bonding step of manufacturing the card by bonding the sheets,
A color development step of heating the card to develop the reversible colorant;
A card manufacturing method comprising: In a method of manufacturing a card that is formed by attaching two or more sheets to each other,
A surface that does not become a surface when it is made into a card before the sheets are bonded to each other, and is exposed to the side edge surface of each card when it is cut into individual cards and is offset from the center of the card in plan view In addition, a coloring step of coloring by applying a colorant that is erased by heating,
After this coloring step, a bonding step of manufacturing the card by bonding the sheets,
Cutting to individual cards, and the coloring step to expose the colored portion on the side edge surface of each card,
A card manufacturing method comprising: In a method of manufacturing a card that is formed by attaching two or more sheets to each other,
A surface that does not become a surface when it is made into a card before the sheets are bonded to each other, and is exposed to the side edge surface of each card when it is cut into individual cards and is offset from the center of the card in plan view In addition, a coloring step of coloring by applying a reversible colorant that repeats coloring and decoloring by controlling heating conditions,
After this coloring step, a bonding step of manufacturing the card by bonding the sheets,
Cutting to individual cards, and the coloring step to expose the colored portion on the side edge surface of each card,
A color development step of heating the card to develop the reversible colorant;
A card manufacturing method comprising:   The card manufacturing method according to claim 1, wherein the colorant is applied using a dispenser.