JP5169700B2 - Black card with hidden print layer - Google Patents

Description

The present invention is a surface color of the card about the black card, in particular, in addition to the surface-side transparent over sheet surface having a black solid print layer, on the lower surface of the surface-side transparent over sheet, further comprising a concealing layer of black The present invention relates to a black card with high wear resistance.

A card whose surface color is black, that is, a black card is given to important customers and members, and has a large image as a high-end card. In general, card issuers classify members into “general card members”, “gold card members”, and “black card members” according to their status to differentiate services. In particular, "black card members" are said to be able to receive the highest level of service, mainly for the wealthy.
However, if the black card is used for a long period of time, the black corners and edges of the card will be peeled off, and the silver color of the lower color concealed silver and the white color of the core sheet will be visible from the surface. This is because the oversheet on the lower surface of the concealed silver print is transparent, and when the black print and the concealed silver print are peeled off, the white color of the core sheet of the card center layer can be easily seen. The black card has a problem that this stripped state is particularly noticeable. If this happens, the high-class feeling will disappear, and it will be rather shabby.

6A and 6B are diagrams showing a card state after long-term use. FIG. 6A is a plan view, and FIG. 6B is a schematic cross-sectional view of FIG. 6A.
The surface printing wear portion 1m often occurs at the four corners and edge portions of the card and around the IC module 8. This is considered to be caused by mechanical friction at the time of card insertion or insertion / removal to / from the reader / writer, or contact friction with clothes generated while carrying the card. Although the phenomenon of peeling off the foil pressing applied to the surface of the letter 9 embossed in a convex shape occurs, this is a problem of chipping peeling due to foil pressing, unlike the abrasion of surface printing. Regarding chipping peeling, a countermeasure has been proposed in the earlier application (Patent Document 3) of the applicant.

  As shown in FIG. 6B, in recent cards (especially magnetic cards and IC cards), one or two (two in FIG. 6) core sheets 101 and 102 are used as a central layer, and both sides are protected. In many cases, the card base 10 is formed by laminating transparent oversheets 103 and 104. The transferred pattern layer 6 is formed on the black card surface. The pattern layer 6 is composed of a pattern print 3 such as an oset, a black solid print 4 and a concealed silver print 5 by a relatively thick silk screen print or the like, and a release layer 7 is formed on the outermost surface. The release layer 7 is a layer formed on the substrate surface of the transfer film in order to easily peel the pattern layer 6 from the transfer film, and is usually transferred to the pattern layer 6 side after transfer. This is an extremely thin (1-2 μm) layer, but serves as a protective layer. On the back side of the card, a pattern print 3 such as an osset and a silver print 5 are also performed.

The oversheet 103 is a transparent sheet having a thickness of 50 to 100 μm made of a material such as vinyl chloride, polyethylene terephthalate (PET), or PET-G.
Inside the oversheet 103 is a white core sheet 101. In order to conceal the magnetic tape 12 transferred to the oversheet 103, concealed silver printing (printing of solid silver) 5 is often performed on the surface. As described above, the edge portion of the black card is worn out and the appearance value is lowered because the black solid print 4 is worn and the concealed silver print 5 becomes visible or the concealed silver print 5 is also worn. This is because the white color of the core sheet 101 can be seen through the transparent oversheet 103. The upper left part of FIG. 6 (B) shows the abrasion part 1m. The oversheet 103 may be worn away. The upper right part and the like are also worn but not shown.
Although the black solid print 4 and the oversheet 103 are both in consideration of durability, such a card state may be unavoidable when used for many years.

  Accordingly, in the present invention (Claim 1), instead of the concealed silver print 5 (with the concealed silver print 5 stopped), silk screen printing with a black color substantially the same as the black solid print 4 of the oversheet is applied to the core sheet 101. In contrast, when the black solid print 4 and the oversheet 103 are worn, it is considered that the white color of the core sheet 101 does not appear on the appearance by the silk screen printing. In claim 2, a transparent material is used for the core sheet.

As in the present invention, prior art aimed at preventing wear of the card is not particularly detected, but there are Patent Documents 1 and 2 relating to a reader / writer and the like considering prevention of card wear.
Patent Document 4 is a prior application by the applicant in which a transparent base material is used as a core sheet so that the base material looks black when viewed from the side of the card. Patent Document 4 relates to the invention used in claim 2.
JP-A-6-187508 JP 2006-307157 A Japanese Patent Application No. 2008-005583 Japanese Patent Application No. 2008-024854

  For cards with a black card surface color, the inner core sheet white (or transparent) does not appear even if the black printed layer or oversheet layer, such as the edge, wears out over many years, and it is a high-grade product as viewed from the outside. Provide cards that are unlikely to cause a drop in feeling.

1 aspect of the present invention to solve the above problems has a white core sheet around layer of the card body, through at least the surface of the card-side transparent over sheet of card laminated transparent over sheet on both surfaces thereof, said in the black card with black solid print layer printed on the surface side transparent over sheet outer surface, a white core sheet surface of the transparent front side over sheet side, is substantially the black solid print layer and the same color black hiding print A black card provided with a concealed printing layer.

2 aspect of the present invention for solving the problems is a transparent core sheet around layer of the card body, through at least the surface of the card-side transparent over sheet of card laminated transparent over sheet on both surfaces thereof, said in the black card with black solid print layer printed on the surface side transparent over sheet outer surface, the transparent core sheet surface of the transparent front side over sheet side, is substantially the black solid print layer and the same color black hiding print And a black card having a concealed printing layer, wherein the other side of the transparent core sheet is black solid printed in the same color as the black solid printed layer printed on the surface.

  In the black card provided with the concealed printing layer, a colored layer of printing ink having a color similar to the chipping color of the embossed character is partially formed on the concealed printing layer in the character embossed portion of the card. In such a case, chipping of the character embossed portion can be compensated.

The black card provided with the concealed printing layer according to claim 1 is used for a long time, and the black concealment printed on the inner core sheet even if the black solid printed layer on the surface or the surface side transparent oversheet on the lower surface is worn. Since the layer has an effect of appearing and supplementing, the appearance of the black card is rarely impaired.
The black card having the concealed printing layer according to claim 2 has the same effect as the card according to claim 1 and also has a black solid printing layer on both sides and the core sheet is made transparent. Even when viewed from the side, the core sheet portion has the effect of appearing black.

Hereinafter, the black card provided with the hidden printing layer of the present invention will be described with reference to the drawings.
FIG. 1 is a sectional view showing a first form of a black card provided with a concealed printing layer of the present invention, FIG. 2 is a sectional view showing the second form, and FIG. 3 is a side view of the black card of the second form. FIG. 4 is a diagram illustrating a configuration of a painting transfer film, and FIG. 5 is a diagram illustrating a transfer process.

FIG. 1 is a cross-sectional view showing a first form 1a of a black card (hereinafter also referred to as “black card”) provided with a concealed printing layer of the present invention. As shown in FIG. 1, a card substrate 10 layer in which one or several (two in FIG. 1) white core sheets 101 and 102 are used as a central layer, and protective transparent oversheets 103 and 104 are laminated on both sides thereof. It consists of a configuration. The surface side transparent oversheet 103 and the core sheet 101, and the back surface side transparent oversheet 104 and the core sheet 102 are separated from each other in FIG. 1, but are bonded by heat fusion or an adhesive sheet. Is. The configuration of the card base 10 is the same as that of the conventional black card described in FIG.
The total thickness of the card is 0.76 ± 0.08 mm, more preferably 0.78 ± 0.04 mm, which conforms to the ISO standard.
The pattern layer 6 transferred to the front side transparent oversheet 103 of the card is formed. The pattern layer 6 is composed of a relatively thick black solid print 4a by silk screen printing or the like and a pattern print 3 such as offset. The black solid print 4a is usually printed to a thickness of about 1 μm to 10 μm. The release layer 7 is formed on the outermost surface as in the conventional product.

Wherein the black card 1a, in addition to the black solid printing 4a printed on the transparent front side over sheet outer surface, on the surface side transparent over sheet 103 side surface of the core sheet 101, substantially black solid printing 4a and of the same color The black concealment printing 2 is performed. The black concealment printing 2 is a direct printing (direct printing) on the core sheet 101, and the black solid printing 4a is a transfer printing. The black concealment printing 2 is also a solid printing by silk screen printing. It is preferable that the hues of the two are approximate to such an extent that they cannot be discerned with the naked eye. Both are made of the same material, but the inside printed twice is called concealment printing. The black concealment printing 2 is also usually printed with a thickness of about 1 μm to 10 μm.

However, the concealed silver printing 5 (see FIG. 6B) used in the conventional black card is not performed. Also on the back side of the card, black solid printing printed on the outer surface of the back side transparent oversheet 104 is performed, and a black color substantially the same color as the black solid print 4a is formed on the side surface of the back side transparent oversheet 104 of the core sheet 102. Although it may be concealed, the appearance on the back side of the card is not as important as the front side.
Therefore, the back side of the card may be the same as the conventional configuration. In other words, the outer surface of the white core sheet 102 may have a silver print 5 or other dark color. Usually, offset printing 3 of characters or the like is performed. The concealing silver printing 5 has the purpose of concealing the magnetic tape 12, but when there is no magnetic tape on the back surface, the concealing silver printing 5 is regarded as the silver printing 5 because there is no purpose of concealing.

  In the above, “solid printing” usually means printing on the entire surface, but the portion where the lower color is desired to be bright, such as the mark portion 1M of the card and the hologram foil transfer portion 1H (see FIG. 6), The black part may be removed as appropriate. In short, it is only necessary to achieve a black card appearance, and it does not necessarily mean that the entire surface is “black”. Hereinafter, the same applies to the case of “solid printing”.

The colored layer 11 is a portion printed with a printing ink of the same color as the chipping color of the embossed characters. As described in the above-mentioned Patent Document 3, when the foil-pressed colorant applied to the surface of the letter 9 embossed in a convex shape is peeled off, the colored layer 11 is made visible so that the surface peeling is noticeable. It is given to eliminate.
Unlike the card surface printing wear countermeasure, this is a means to compensate for chipping peeling. However, since it can be performed in the same process as the formation of the concealed printing layer, there is an advantage that it can be used in combination with the present invention.

FIG. 2 is a cross-sectional view showing a second form 1b of the black card provided with the concealed printing layer of the present invention. As shown in FIG. 2, the card base 10t has a layer structure in which one or several transparent core sheets 101t and 102t are used as a central layer, and protective transparent oversheets 103 and 104 are laminated on both surfaces. In Figure 2, the core sheet is two, but may be three or four. Sometimes referred to as a spacer sheet.
The pattern layer 6 transferred to the surface-side transparent oversheet 103 of the card is formed, and the pattern layer 6 is formed from a relatively thick black solid print 4a by silk screen printing or the like and a pattern print 3 by offset or the like. It is the same as in the first embodiment that the release layer 7 is formed on the outermost surface.

Black card 1b, in addition to the black solid printing 4a printed on the transparent front side over sheet 103 outer surface, the front surface side transparent over sheet 103 side outer surface of the core sheet 101 t, is the black hiding print 2, the transparent core sheet There is a feature that black solid print 4b is formed on the outer surface of 102t. Although not shown, the silver print 5 may be used in combination on the outer surface side of the black solid print 4b.
Since it is a transparent core sheet, white color does not appear on the surface as in the case of a white core sheet. Black solid printing may be performed on the lower transparent oversheet 104, but if either one is black, the core sheet looks black.

Both the black concealment printing 2 and the black solid printing 4b are solid-printed by silk screen printing. However, the black concealment printing 2 for the transparent core sheet 101t and the black solid printing 4b and the offset printing 3 for the transparent core sheet 102t are printed by heat. This is performed in the process before pressing. The black solid print 4b needs to be printed on the back side of the card, i.e., the outer surface of the transparent core sheet 102t or the back side transparent oversheet 104. The incident light from the other side when the card is viewed from the side. This is because the core sheets 101t and 102t appear to be black. Similar to the first embodiment, a colored layer 11 that compensates for chipping may be provided.

FIG. 3 is a diagram for explaining a case where the black card 1b of the second embodiment is viewed from the side. The layer structure of the card is schematic. In the case of the second form, since both sides of the card are black, no light enters from the front and back. Even if light L enters from one side of the core sheet of the black card 1b and travels through the transparent core sheets 101t and 102t, it is between the black solid print 4a (also contributing to the black concealment print 2) and the black solid print 4b. The core sheets 101t and 102t appear to be black when viewed from either side because they are absorbed by the multiple reflection while passing through and disappear. Since the core sheet is transparent, surface reflection does not occur even when light is applied from the card side. On the other hand, in the case of the first form, the white core sheet of the central layer naturally appears white because of the surface reflection.
Therefore, in the case of the second embodiment 1b, it is necessary to perform black solid printing on both the transparent oversheet 103 and the transparent core sheet 102t on the front surface side, and it is meaningful to perform black solid printing only on one surface of the card. There will be no. This card is described in detail in the above-mentioned patent document 4, but the card of the second form has a significance of providing a higher degree of durability.

If the black card 1a of the first form uses a black core sheet, the black core sheet can be seen even if the black solid print or the oversheet is worn, so that the appearance is not deteriorated. It is done. If the black card 1b of a 2nd form also uses a black core sheet, a side surface does not look white.
However, if black pigment is used in the molding equipment, sheet substrate manufacturers will cause black stains in the subsequent sheet processing, which requires time-consuming and careful cleaning of the equipment. Therefore, it is not aggressive to supply materials at the same price as white or transparent materials. Therefore, there is a problem that the sheet material is soared and the black card itself must be expensive.

Next, the manufacturing process of the black card of this invention is demonstrated.
When the black card is a magnetic card, the core sheet 101 and the core sheet 102 to which the black concealment printing 2 is applied, and the front side transparent oversheet 103 and the back side transparent oversheet 104 to which the magnetic tape is transferred are temporarily stacked. This is performed by hot pressing to form an integral card substrate, and then transferring the pattern layer 6 to the surface of the surface side transparent oversheet 103 using a transfer film for painting. In some cases, the pattern transfer and the card base are integrated in a single process, and the examples described later describe what is performed in a single process.

When the black card is a non-contact IC card, the antenna sheet on which the antenna is formed and the IC chip is mounted is used as a central layer, and the core sheet 102 and the core sheet and oversheet on which the necessary black concealment printing 2 is applied are temporarily stacked. After that, hot pressing is performed to form an integrated card substrate, and then a surface pattern is transferred to the oversheet surface using a transfer film for painting, thereby completing a non-contact IC card. Usually, the IC chip is prevented from appearing on the surface.
If the black card is a contact / non-contact IC card, the core sheet and the oversheet with the necessary black concealment printing 2 are temporarily stacked, and then the hot press Thus, an integrated card base is formed, and then the surface pattern is transferred onto the surface side transparent oversheet surface using a transfer film for painting. Thereafter, the concave portion for mounting the IC module is cut to mount the IC module and connect the antenna to complete the shared IC card.
When the black card is a contact IC card, only the IC module is mounted without using the antenna sheet.
Since these steps are also described in detail in the prior art, detailed description will be avoided, and the pattern transfer step and black masking printing related to the present application will be described below.

FIG. 4 is a diagram showing a configuration of a painting transfer film.
The transfer film 20 for painting is formed by printing a thin release layer 27 (thickness 0.5 μm to 2 μm by gravure printing) 27 on a transfer film substrate 21 such as PET, and then performing offset printing on a part of the release layer 27. The pattern 23 is printed by silk screen printing, and finally the black solid print 24 is printed by silk screen. In order to express brightly the mark part etc. which shows a card issuing company, it is preferable to exclude the black solid printing 24. FIG. Mark designs, white characters, etc. are often printed with an offset, but silk screen printing may also be used.
If a black design 24 is printed after a mark design, white characters, etc. (picture 23) are printed, a clear character is obtained. Conventionally, the black solid print 24 has been printed with the silver solid superimposed, but in the present invention, the silver solid is stopped and the black concealment printing 2 is performed on the core sheet 101.

FIG. 5 is a diagram showing a picture transfer process.
In the transfer step, the transfer film 20 is transferred to the surface side transparent oversheet 103 surface. The front surface side transparent oversheet 103 is temporarily stacked together with the core sheets 101 and 102 and the back surface side transparent oversheet 104. Temporary stacking refers to a state in which the layers of each base material are aligned in a state where they are not permanently bonded, and the sheets are fixed by spot welding or the like so as not to be displaced. On the surface of the core sheet 101 facing the front surface side transparent oversheet 103 side, black concealment printing 2 is performed, and if necessary, the colored layer 11 is also printed. These are preferably by silk screen printing which is printed thick.
The transfer is performed by aligning and superimposing the painting transfer film 20 on the surface of the oversheet 103, sandwiching it between the metal mirror plates 30, and applying heat pressure to press laminate. If the transfer film substrate 21 is peeled after pressing, the pattern 23 and the black solid print 24 below the peeling layer 27 are transferred to the surface side transparent oversheet 103 side, and the state shown in FIG. 1 is obtained. This process is generally performed in a state of multiple card imposition. When the black solid print 4 is transferred to both sides of the card substrate 10, the transfer film 20 is applied to both sides of the front surface side transparent oversheet 103 and the back surface side transparent oversheet 104 and can be transferred in the same process.

The black concealment printing 2 is printed on the core sheet 101 in advance. When forming the black concealment printing 2 on both sides of the card, of course, it is also printed on the core sheet 102 in advance.
It is preferable that this printing is visually the same color as the black solid printing 4 in appearance. Therefore, usually, the same ink is used and printed in substantially the same thickness by the same method.
In order to produce a black card, in many cases, black is used on the card surface as described above, but brown, blue, green, etc. close to black may be used.
The above describes the manufacturing process of the first form. However, in the case of the second form, the only difference is that the transparent core sheet is used and black solid printing is performed on both sides. There is no need to add.

(Embodiment related to material)
For the oversheets 103 and 104, transparent amorphous polyester resin, transparent polylactic acid resin, transparent polyvinyl chloride resin, or the like can be used.
In the black card of the first form, white amorphous polyester resin, polylactic acid resin, polycarbonate resin, polyvinyl chloride resin, or the like can be used for the core sheets 101 and 102. In the black card of the second form, the core sheets 101t and 102t can be made of a highly transparent material based on these resin systems.
The amorphous polyester-based resin is generally a dehydration condensation product of an aromatic dicarboxylic acid and a diol, and is made of a non-crystalline aromatic polyester resin having particularly low crystallinity among the copolyesters. Examples of the dicarboxylic acid include terephthalic acid, isophthalic acid, adipic acid, and naphthalenedicarboxylic acid. Examples of the diol include ethylene glycol, diethylene glycol, triethylene glycol, and 1,4-cyclohexanedimethanol.
As the non-crystalline polyester resin, a product (trade name “PET-G”) in which 30 mol% of the ethylene glycol component in polyethylene terephthalate is replaced with 1,4-cyclohexanedimethanol is commercially available from Eastman Chemical. These can be used.

The polylactic acid-based resin includes, for example, poly-3-hydroxyalkanoate, a copolymer of 3 or 4-hydroxyalkanoate, or a mixture thereof, an aliphatic polyester obtained by polycondensation of dicarboxylic acid and glycol, and Alternatively, polylactic acid obtained by directly or directly carrying out ring-opening polymerization of dimer using lactic acid as a raw material is used by blending two or three kinds.
About a polyvinyl chloride resin, a hard thing can be used by a well-known material.

For silk screen ink used for black solid printing or black concealment printing, an ink obtained by adding a pigment to an acrylic resin and a vinyl acetate resin is usually used.
A commercially available ultraviolet curable offset ink or a commercially available screen printing ink is used for the front surface pattern printing portion and the back surface pattern printing portion.
For printing the release layer, a wax-containing transparent resin can be used, and as the transparent resin, an acrylic resin, a modified cellulose resin, a silicon resin, or the like can be used.

(Preparation of front transfer film)
A release layer 27 is gravure-printed to a thickness of 1 to 2 μm on a transfer film substrate 21 made of polyethylene terephthalate (PET) having a thickness of 150 μm (may be 20 to 200 μm). The card pattern 23 was offset printed.
Subsequently, a black solid print 24 by silk screen printing was printed on the release layer 27 and the pattern 23 so as to have a thickness of 4 to 5 μm. Since the black solid print 24 also functions as an adhesive layer, the adhesive layer need not be provided separately.

In the above, the silk screen printing ink of the black solid printing 24 has the following composition.
(Ink composition)
Acrylic resin 10 parts by weight Vinyl acetate resin 10 parts by weight Carbon pigment 5 parts by weight Solvent (anone, toluene, etc.)

(Preparation of card base)
Black concealment printing 2 was performed by black silk screen printing on the white core sheet 101 made of PET-G resin having a thickness of 360 μm. The thickness of the black masking print 2 is 4 to 5 μm. Further, a colored layer 11 of printing ink (gold color) similar in color to the chipping color of the embossed character is placed on the black concealed printing 2 at a position corresponding to the character embossed portion of the card, and the width is 10 mm × long by silk screen printing. The size was 72 mm, and the thickness was printed to be 3 to 6 μm.
In addition, the same ink as the silk screen printing of the black solid printing 24 was used as the silk screen printing ink of the black concealment printing 2.

The white core sheet 101 has a pattern layer 6 on the outer surface, and a core sheet 102 made of a PET-G resin having a thickness of 360 μm is bonded to form a center layer, and a transparent overcoat made of a PET-G resin having a thickness of 50 μm is formed on both sides. Sheets 103 and 104 were temporarily stacked, and the transfer film prepared above was sandwiched between stacked mirror plates as shown in FIG.
The outer surface of the surface side transparent oversheet 103 has the magnetic tape 12 already transferred, and the outer surface of the core sheet 102 has a card printing rule on the five silver prints on the silk screen. Offset printing 3 is performed. Therefore, the pattern transfer is not performed on the back side.

  When the transfer film substrate 21 was peeled off after pressing and cooling, a black card was obtained. With respect to this card, the IC module mounting position was cut, the contact type IC module was mounted, and further, character embossing and chipping in gold color, the contact type IC card with magnetic tape was completed.

(Preparation of front transfer film)
The release layer 27 was gravure printed on a transfer film substrate made of polyethylene terephthalate (PET) having a thickness of 150 μm to a thickness of 1 to 2 μm, and a mark or card pattern print 6 was offset printed on the surface of the release layer 27. . Subsequently, a black solid print 24 by silk screen printing was printed on the surface of the release layer 27 and the pattern 23 so as to have a thickness of 3 to 6 μm.
The same printing ink as that used in Example 1 was used.

(Preparation of card base)
Black concealment printing 2 was performed on a transparent core sheet 101t made of PET-G resin having a thickness of 360 μm by black silk screen printing. The thickness of the black masking print 2 is 3 to 6 μm. Similarly, black solid printing 4b was performed by black silk screen printing on the transparent core sheet 102t made of PET-G resin having a thickness of 360 μm. The thickness of the black solid print 4b is 3 to 6 μm. The same black silk screen printing ink as in Example 1 was used.

The black masking print 2 of the transparent core sheet 101t is arranged on the outer surface, and is bonded to the core sheet 102t made of a transparent PET-G resin having a thickness of 360 μm to form a center layer, and on both surfaces thereof, the PET-G resin having a thickness of 50 μm is made. The transparent oversheets 103 and 104 were temporarily stacked, and the painting transfer film 20 prepared above was stacked on the surface-side transparent oversheet 103 side, and sandwiched between mirror plates and hot-pressed. The transparent oversheets 10 3 and 10 4 have the magnetic tape 12 transferred thereon.

  When the transfer film substrate 21 was peeled off after pressing and cooling, a magnetic card having a black surface was obtained. This card was not only black on the front and back of the card, but also appeared black when viewed from either side of the card.

(Comparative example)
(Preparation of front transfer film)
The transfer layer substrate made of polyethylene terephthalate (PET) having a thickness of 150 μm was subjected to gravure printing so that the release layer 27 had a thickness of 1 to 2 μm, and a mark or card pattern 23 was offset printed on the surface of the release layer 27. A black solid print 24 by silk screen printing is printed on the surface of the release layer 27 and the pattern 23 so as to have a thickness of 1 to 6 μm. Further, a concealed silver print 5 is printed on the black solid print 24 surface by silk screen printing to obtain a thickness of 4 Printing was carried out so as to be ˜5 μm. The same printing ink as that used in Example 1 was used for the black solid printing 24.

(Preparation of card base)
A white core sheet 101 made of a PET-G resin having a thickness of 360 μm is bonded to a white core sheet 102 made of a PET-G resin having a thickness of 360 μm as a central layer, and a transparent overcoat made of a PET-G resin having a thickness of 50 μm is formed on both sides thereof. Sheets 103 and 104 were temporarily stacked, and the painting transfer film 20 prepared above was stacked as shown in FIG. 5 and sandwiched between mirror plates and hot-pressed. The surface-side transparent oversheet 103 has the magnetic tape 12 transferred thereon, and the outer surface of the core sheet 102 is printed with a silver printing surface using a silk screen offset printed on the card. It is. Therefore, back surface transfer is not performed. The printing ink having the same resin composition as in Example 1 was used.

  After pressing and cooling, when the transfer film substrate was peeled off, a card with a black surface was obtained. An IC module mounting position was cut on this card, and a contact IC module was mounted to complete a contact IC card with magnetic tape.

For each of the 10 cards completed in Example 1, Example 2, and Comparative Example, a friction test by card insertion / extraction test was performed using a simulation test apparatus of ATM (Automatic Teller Machine) specifications.
In the card of the comparative example, the black solid printing was worn out at the edge of the card surface in the repeated insertion / extraction test of about 1000 times on average, and the silver color of the concealed silver print 5 became visible.
On the other hand, in the cards of Example 1 and Example 2, the core sheet was not seen from the card surface even in the insertion / extraction test of about 3000 times. Further, even when the golden embossing of the character embossed part was peeled off, the appearance of the embossed part was not deteriorated.

It is sectional drawing which shows the 1st form of the black card provided with the concealed printing layer of this invention. It is sectional drawing which shows the 2nd form. It is a figure explaining the case where the black card of the 2nd form is seen from the side. It is a figure which shows the structure of the transfer film for painting. It is a figure which shows a design transfer process. It is a figure which shows the card | curd state after using for a long period of time.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a, 1b Black card 2 with a concealment printing layer Black concealment printing 3 Pattern printing such as offset 4, 4a, 4b Black solid printing 5 Concealing silver printing 6 Pattern layer 7 Peeling layer 8 IC module 9 Embossed character 10 Card base 11 Colored layer 12 Magnetic tape 20 Painting transfer film 21 Transfer film substrate 23 Picture 101, 102 Core sheet 103, 104 Transparent oversheet

Claims (3)

It has a white core sheet around layer of the card body, through at least the surface of the card-side transparent over sheet of card laminated transparent over sheet on both surfaces thereof, a black solid printed on the front surface side transparent over sheet outer surface A black card having a printed layer, comprising a concealed print layer, wherein the white core sheet surface on the surface side transparent oversheet side is substantially black concealed in the same color as the black solid print layer Black card. A transparent core sheet around layer of the card body, through at least the surface of the card-side transparent over sheet of card laminated transparent over sheet on both surfaces thereof, a black solid printed on the front surface side transparent over sheet outer surface in the black card having a printed layer, the transparent core sheet surface of the transparent front side over sheet side, it is substantially the black solid print layer and the same color black hiding print, on the other surface of the transparent core sheet, on the surface A black card provided with a concealed printing layer, wherein black solid printing of the same color as the printed black solid printing layer is performed. The concealment according to claim 1 or 2, wherein a colored layer of printing ink having a color similar to the chipping color of the embossed character is partially formed on the concealed printing layer in the character embossed portion of the card. Black card with printed layer.

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