JP2020113038A - IC card - Google Patents

Abstract

To provide a core sheet for a non-contact type IC card which improves smoothness (stability in manufacture) and a decorative effect by improvement of a laminated structure by a combination of core sheet base materials.SOLUTION: An IC card includes a transparent center core sheet which has a non-contact IC module and an IC inlet having an antenna circuit connected to the non-contact IC module formed thereon and is provided on at least a formation surface of the antenna circuit, and colored core sheets and transparent outer sheets on a surface and a back face of the center core sheet, in which the core sheets (surface) and (back surface) are each composed of PVC resins, the total of the thicknesses is 0.4 mm or more and 0.7 mm or less, the center core sheet is composed of a PET-G resin, and the total of the thickness is 0.1 mm or more and 0.3 mm or less.SELECTED DRAWING: Figure 1

Description

The present invention relates to an IC card type medium having a plastic sheet as a main material, and relates to an IC card having improved decorativeness on the end surface of the card.

An integrated circuit for recording and computing information (data) among information recording media such as commuter pass, ticket, admission ticket, prepaid card, credit card, cash card, point card, various securities, identification card, etc. The spread of IC cards incorporating (IC) and having functions such as non-contact communication and information processing is remarkable.

In conventional cards other than IC cards, a white sheet formed by kneading a white pigment into a sheet, or a colored sheet formed by kneading a colorant other than white into a resin is used as a core sheet. Generally, a structure in which a transparent oversheet is laminated is provided.

On the other hand, there is disclosed a card having a colored portion on at least a part of the side surface around the card (see, for example, Patent Documents 1 and 2).

Furthermore, as a proposal for improving the productivity and suppressing the cost increase by omitting the step of separately coloring the peripheral side surface of the card in Patent Documents 1 and 2, white sheets and coloring on the core layer and the oversheet layer are provided. A proposal that realizes to provide a card in which the end surface of the card looks colored without using a sheet is known (see Patent Document 3).

The card according to Patent Document 3 has a structure in which a core layer made of a transparent sheet is provided with oversheet layers made of a transparent sheet on both surfaces, and at least one transparent colored printing layer is further laminated. By doing so, part of the light incident on the card is transmitted through the transparent colored printing layer and part of it is reflected, and the end face of the card appears to be colored with a color corresponding to the color of the transparent colored printing layer. Play. Further, since a transparent sheet is used for the core layer, it is said that the cost of the sheet can be reduced as compared with the case where a colored sheet or a white sheet is used.

In a general structure of a non-contact type IC card, an IC inlet composed of a non-contact type IC module and an antenna connected to the non-contact type IC module is sandwiched between thermoplastic core sheets, and outer sheets are laminated on both sides of the core sheet. Become. The core sheet base material for non-contact type IC cards is not a base material such as PVC or PET-G that flows by heat and pressure, but a porous thermoplastic base obtained by foaming a resin. In many cases, a material is used, the resin is melted by the press working on the core sheet in which the holes are formed and the holes are filled, and mechanical strength is ensured in the manufactured IC card. (See Patent Documents 4 and 5)
In Patent Document 4, the deflection temperature under load of the materials forming the first to third core sheet layers is set in order to reduce the number of times of pressing in the manufacturing process to one and surely suppress irregularities generated on the surface of the IC card. , The thickness relationship is specified.

In Patent Document 5, a core sheet having a structure in which a thermoplastic protective layer as a layer for suppressing the permeation of moisture and various ions is laminated on the inner surface of a porous thermoplastic substrate, A non-contact type information medium accessory booklet (data page for IC passport) that can be authenticated from the side by coloring is proposed.

JP, 11-34546, A Japanese Patent Laid-Open No. 2000-301871 Japanese Patent No. 6069930 Japanese Patent No. 5702688 Japanese Patent No. 5780080

In a core sheet for a non-contact type IC card that uses a base material that flows by heat and pressure, such as PVC or PET-G, which has advantages in terms of availability and cost, PVC alone or PET-G alone is used. When used as a base material, in the case of PVC, it is difficult to obtain a highly smooth core sheet by suppressing the generation of irregularities due to the sandwiching of the IC inlet due to the heat flow of the core sheet base material. There is. In the case of PET-G, white, black, transparent, and semi-transparent materials are available, but a lineup of colored materials is available by the time a core sheet is obtained that can be authenticated from the side (card edge) by arbitrary coloring. However, there is a problem in adding a decorative effect so that the card end surface has an arbitrary color.

An object of the present invention is to propose a core sheet for a non-contact type IC card, which has improved smoothness (stability during manufacturing) and decorative effect by improving the laminated structure by combining core sheet base materials. To do.

The IC card according to the present invention is
An IC inlet having a non-contact IC module and an antenna circuit connected to the non-contact IC module formed on the surface;
A transparent center core sheet provided on at least an antenna circuit formation surface of the IC inlet;
A colored core sheet (front) provided on the surface side of the center core sheet,
A colored core sheet (back) provided on the back side of the IC inlet;
An IC card having a laminated structure comprising a transparent exterior sheet on each of a front surface side of the core sheet (front) and a rear surface side of the core sheet (back),
The core sheet (front) (back) is made of PVC resin, and has a total thickness of 0.4 mm or more and 0.7 mm or less,
The center core sheet is made of PET-G resin and has a total thickness of 0.03 mm or more and 0.3 mm or less.

The transparent center core sheet may be provided on the back surface of the IC inlet (the side opposite to the surface on which the antenna circuit is formed).

The colored core sheet (front) and the colored core sheet (back) may have the same color.

Since the transparent center core sheet is a highly fluid PET-G resin, the center core sheet flows due to the heat during lamination processing, filling the periphery of the antenna circuit section and locally applying pressure to the antenna circuit section. Is eliminated, and since the colored core sheets made of thick PVC resin are laminated, it is possible to prevent the mark of the antenna circuit portion from being raised on the card surface.

Since the center core sheet is transparent, the light incident from the side surface of the center core sheet, when propagating in the center core sheet, is repeatedly reflected at the interfaces with the colored core sheets on the front and back and scattered in the center core sheet, When the colored core sheet (front) and the colored core sheet (back) have the same color, the center core sheet functions so as to exhibit the hue of the colored core sheet. The entire laminated structure consisting of "sheet/colored core sheet (back side)" is visualized in the same color. When the hues of the colored core sheet (front) and the colored core sheet (back) are different, the laminated structure consisting of "colored core sheet (front)/center core sheet/colored core sheet (back)" has three colors. Visualized in different hues, it is possible to express various colors according to the combination of hues.

As a result, the present invention provides a non-contact type IC card having a configuration with improved smoothness (stability during manufacturing) and decorative effect of the IC card.

Sectional drawing which shows the card which concerns on embodiment of this invention. Sectional drawing which shows the card which concerns on embodiment of this invention. Explanatory drawing showing propagation and reflection of incident light on the card end surface.

Hereinafter, embodiments of the present invention will be described, but the present invention is not limited to the following description and drawings.

<Embodiment 1>
FIG. 1 is a sectional view showing a card 100 according to a first embodiment of the present invention.

IC card 100
An IC inlet 10 on which a non-contact IC module 11 is mounted, and an antenna circuit 12 connected to the non-contact IC module 11 is formed on the surface,
A transparent center core sheet 20 provided on the surface of the IC inlet 10 on which the antenna circuit 12 is formed;
A colored core sheet 30 provided on the front surface side of the center core sheet 20 (front: upper side in the figure);
A colored core sheet 30 provided on the back side of the IC inlet 10 (back side: lower side in the figure);
The laminated structure includes a transparent exterior sheet 40 on each of the front surface side (upper side in the figure) of the core sheet 30 (front side) and the back surface side (lower side in the same figure) of the core sheet 30 (back side).

The core sheet 30 (front) (back) is made of PVC resin and has a total thickness of 0.4 mm or more and 0.7 mm or less. The center core sheet 20 is made of PET-G resin and has a total thickness. Is 0.03 mm or more and 0.3 mm or less.

PET-G resin was developed as a substitute for PVC resin, which is a concern for environmental impact, and is a material that is more expensive than PVC resin in terms of cost. It is expected that frequently used transportation cards and high temperature conditions will occur. It has been introduced for in-vehicle equipment applications. The PET-G resin is a glycol-modified PET resin, and the PET resin is a polyester obtained by condensation polymerization of terephthalic acid and ethylene glycol, while the PET-G resin is a part of ethylene glycol (dihydric alcohol) in cyclohexane. It is replaced by dimethanol (dihydric alcohol) and is amorphous.

Examples of the transparent exterior sheet 40 include synthetic resins such as PET, PVC, polycarbonate, polymethylmethacrylate, polystyrene, polylactic acid, polycaprolactone, poly(3hydroxybutyrate-3hydroxyvarilate), polyvinyl alcohol, and natural resins. Etc. can be used.

The center core sheet 20 is a colorless and transparent sheet, and the colored core sheets 30 arranged on both sides of the center core sheet 20 have the same hue. By adopting such a laminated structure, when viewed from the end surface of the card 100 (from the left and right in the figure), the light incident from the side surface of the center core sheet 20 can be seen even though the center core sheet 20 is colorless and transparent. However, when propagating in the center core sheet 20, the light is repeatedly reflected at the interfaces with the front and back colored core sheets 30 and scattered in the center core sheet 20, so that the center core sheet 20 exhibits the hue of the colored core sheet 30. And the hue of the colored core sheet 30 looks as if the card end surface (side surface of the center core sheet 20) is colored. (See Fig. 3(a))
When a light-transmitting material is used as the colored core sheet 30, not only the end face of the card but also the incident light from the card surface propagates in the center core sheet 20 as shown in FIG. 3B. Also, it may contribute to that the center core sheet 20 looks colored due to reflection. Further, when both the front and back core sheets 30 are not translucent materials and one is non-translucent, light incident from the surface of the core sheet 30 on the translucent side is colored and transmitted. It is also possible to increase the amount of colored light emitted from the end surface of the card without being transmitted and emitted from the non-translucent core sheet 30 side.

<Embodiment 2>
FIG. 2 is a sectional view showing a card 100 according to the second embodiment of the present invention.

The difference from the first embodiment is that the transparent center core sheet 20 is arranged not only on the side of the IC inlet 10 on which the antenna circuit 12 is formed but also on the front and back sides of the IC inlet 10.

In the case of the above-mentioned form, it is possible to prevent the mark of the antenna circuit portion from protruding to the back surface side even when the IC inlet in which a part of the circuit is provided on the back surface side is used.

<Example 1>
Transparent exterior sheet 40 (front): transparent PET with a thickness of 0.1 mm
Colored core sheet 30 (front): 0.2 mm thick red PVC
Center core sheet 20: 0.15 mm thick transparent PET-G
IC inlet 10: thickness 0.07 mm
Colored core sheet 30 (back): 0.2 mm thick red PVC
Transparent exterior sheet 40 (back): transparent PET with a thickness of 0.1 mm
The above-mentioned members arranged in order from the card front side (top) were laminated, integrated by laminating press at 130° C., and then punched into a predetermined size to produce an IC card.

<Example 2>
Transparent exterior sheet 40 (front): transparent PET with a thickness of 0.1 mm
Colored core sheet 30 (front): 0.2 mm thick red PVC
Center core sheet 20: transparent PET-G with a thickness of 0.075 mm
IC inlet 10: thickness 0.07 mm
Center core sheet 20: transparent PET-G with a thickness of 0.075 mm
Colored core sheet 30 (back): 0.2 mm thick red PVC
Transparent exterior sheet 40 (back): transparent PET with a thickness of 0.1 mm
The above-mentioned members arranged in order from the card front side (top) were laminated, integrated by laminating press at 130° C., and then punched into a predetermined size to produce an IC card.

<Comparative Example 1>
Transparent exterior sheet 40 (front): transparent PET with a thickness of 0.1 mm
Colored core sheet 30 (front): 0.275 mm thick red PVC
IC inlet 10: thickness 0.07 mm
Colored core sheet 30 (back): 0.275 mm thick red PVC
Transparent exterior sheet 40 (back): transparent PET with a thickness of 0.1 mm
The above-mentioned members arranged in order from the card front side (top) were laminated, integrated by laminating press at 130° C., and then punched into a predetermined size to produce an IC card.

<Comparative example 2>
Transparent exterior sheet 40 (front): transparent PET with a thickness of 0.1 mm
Colored core sheet 30 (front): 0.2 mm thick red PVC
Center core sheet 20: 0.15 mm thick white PET-G
IC inlet 10: thickness 0.07 mm
Colored core sheet 30 (back): 0.2 mm thick red PVC
Transparent exterior sheet 40 (back): transparent PET with a thickness of 0.1 mm
The above-mentioned members arranged in order from the card front side (top) were laminated, integrated by laminating press at 130° C., and then punched into a predetermined size to produce an IC card.

<Comparative example 3>
Transparent exterior sheet 40 (front): transparent PET with a thickness of 0.1 mm
Colored core sheet 30 (front): 0.1 mm thick red PVC
Center core sheet 20: 0.35 mm thick transparent PET-G
IC inlet 10: thickness 0.07 mm
Colored core sheet 30 (back): 0.1 mm thick red PVC
Transparent exterior sheet 40 (back): transparent PET with a thickness of 0.1 mm
The above-mentioned members arranged in order from the card front side (top) were laminated, integrated by laminating press at 130° C., and then punched into a predetermined size to produce an IC card.

Table 1 shows the results of visual evaluation of the layer structure and appearance (front surface, side surface) of the cards obtained in Examples 1-2 and Comparative Examples 1-3.

Example 1, Example 2, Comparative Example 2, which has a layered structure in which the center core sheet 20 made of highly fluid PET-G resin is arranged at least immediately above the IC inlet 10 (the surface on which the antenna circuit is formed). In Example 3, the periphery of the antenna circuit part was embedded and no trace of the antenna circuit part was visible on the card surface. In Comparative Example 1 in which the center core sheet 20 made of highly fluid PET-G resin is not arranged immediately above the IC inlet 10 (the surface on which the antenna circuit is formed), the colored core sheet 30 made of PVC resin is thickened. Even if it is arranged, the traces of the antenna circuit part are raised on the surface of the card, and unevenness is generated.

Visually from the side of the card, in Examples 1 and 2, the red color of the upper and lower colored core sheets 30 was reflected on the transparent center core sheet 20, and it appeared as a substantially uniform red color. In Comparative Example 1, the center core sheet 20 was not provided, and the colored core sheet 30 occupies most of the card thickness.

Comparative Example 2 having a layer structure in which the center core sheet 20 made of white PET-G resin, not the center core sheet 20 made of transparent PET-G resin, is arranged immediately above the IC inlet 10 (the surface on which the antenna circuit is formed). When viewed from the side of the card, it appears as if there is a white line in the center, which is mostly red, and does not have a uniform red color.

In Comparative Example 3, the center core sheet 20 made of transparent PET-G resin has a thickness of more than 0.3 mm, the red color of the upper and lower colored core sheets 30 is not sufficiently reflected, and the red layer of the sunk color is formed. Occupies a large weight in the thickness of the card, and has an unnatural appearance.

10 IC Inlet 11 IC Module 12 Antenna Circuit 20 Center Core Sheet 30 Core Sheet 40 Transparent Exterior Sheet 100 Card

Claims (3)

An IC inlet having a non-contact IC module and an antenna circuit connected to the non-contact IC module formed on the surface;
A transparent center core sheet provided on the surface of the IC inlet on which the antenna circuit is formed;
A colored core sheet (front) provided on the surface side of the center core sheet,
A colored core sheet (back) provided on the back side of the IC inlet;
An IC card having a laminated structure comprising a transparent exterior sheet on each of a front surface side of the core sheet (front) and a rear surface side of the core sheet (back),
The core sheet (front) (back) is made of PVC resin, and has a total thickness of 0.4 mm or more and 0.7 mm or less,
The center core sheet is made of PET-G resin and has a thickness of 0.05 mm or more and 0.3 mm or less. An IC inlet having a non-contact IC module and an antenna circuit connected to the non-contact IC module formed on the surface;
A transparent center core sheet surface provided on the surface of the IC inlet on which the antenna circuit is formed;
A colored core sheet (front) provided on the surface side of the center core sheet (front);
A transparent center core sheet (back) provided on the back side of the IC inlet;
A colored core sheet (back) provided on the back side of the center core sheet (back),
An IC card having a laminated structure comprising a transparent exterior sheet on each of a front surface side of the core sheet (front) and a rear surface side of the core sheet (back),
The core sheet (front) (back) is made of PVC resin, and has a total thickness of 0.4 mm or more and 0.7 mm or less,
The IC card, wherein the center core sheet (front) (back) is made of PET-G resin and has a total thickness of 0.1 mm or more and 0.3 mm or less. The IC card according to claim 1, wherein the colored core sheet (front) and the colored core sheet (back) have the same color.