JP2011088376A - Overprint card - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an overprint card which has a surface protecting layer with superior wear resistance and transparent property and hardly causes emboss cracks during manufacturing. <P>SOLUTION: This overprint card includes a plastic sheet as a core base, and a plastic film laminated on both sides of the core base and a magnetic stripe attached to the surface of the plastic film of the face side of the core base. Both sides of the card base are made flush by heat pressing, and then, a concealing layer, a pictorial pattern layer and a surface protecting layer are formed in this order on the face side of the card base to hide the magnetic strike. The surface protecting layer contains a scaly pulverized mica and covers at least the surface of the magnetic stripe. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a plastic card such as a magnetic card and an IC card. For example, an identification card, an IC card with an external terminal, a credit card with a magnetic stripe, a prepaid card, and a driver's license card, a bank card, and a department store. Customer identification cards such as insurance cards, personal identification cards such as insurance medical cards, various IC cards such as information cards and electronic money IC cards, telephone cards, vehicle cards, prepaid cards such as shopping cards, etc. .

  More specifically, among the ID-1 cards defined in JIS X6301, a so-called overprint card in which a concealment layer is formed on a magnetic stripe is used. It is about improved cards.

Identification cards, IC cards with external terminals, credit cards with magnetic stripes, prepaid cards, etc. have advantages such as portability and convenience as cards with functions such as personal identification, information reading and writing, cash in and out, and cash substitution It is popular from that.
In particular, so-called overprint cards, in which a concealing layer is formed on a magnetic stripe and the magnetic stripe is made invisible to improve the design, are widely distributed mainly in Japan.

  However, when these cards are inserted into a card reader, inserted into or removed from a card case, etc., the card surface may come into contact with other objects, and the card surface may be scratched, making it difficult to see printing or display. there were.

  In particular, the overprint card is not sufficiently strong because the thickness of the nonmagnetic layer that can be formed on the magnetic stripe is limited due to the problem of magnetic output. When reading information recorded on the magnetic stripe, the magnetic layer rubs the magnetic stripe region with the magnetic head, causing wear of the protective layer. When used continuously, the pattern layer and the concealing layer are also scraped by wear, and if the wear further progresses, the magnetic recording layer of the magnetic stripe may be worn and the recorded information may not be read.

  Conventionally, a plastic transparent protective layer has been provided on the card surface as a countermeasure against the problem that the printing or display applied to the card substrate is difficult to see due to scratches on the card surface.

FIG. 3 is a schematic sectional view showing an example of a typical layer structure of a conventional overprint card.
Using a plastic sheet as the core substrate (1), the plastic films (2) and (3) are laminated on both sides of the core substrate, and the magnetic stripe (4) is adhered on the plastic film (2) on the surface side. A concealing layer (not shown), a pattern layer (6), and a surface protective layer (9) are provided in this order on the surface side of the card substrate (5) whose both surfaces are flush with each other by heat pressing to conceal the magnetic stripe. This is an example of the layer structure of the overprint card (12).

  As a material for the transparent surface protective layer (9) provided on the card surface, acrylic resin and urethane resin have been widely used from the viewpoint of transparency and adhesiveness. During use, it was inevitable that the card surface was easily scratched.

  In order to make the card surface difficult to be scratched, it has been a common measure to harden the surface of the transparent protective layer. In order to make the surface of the coating protective layer hard, a method of using a hard resin as a resin used for the protective layer and a method of filling hard particles such as inorganic oxides have been mainly used.

  The method of preventing scratches by a protective layer filled with hard particles such as inorganic oxides is usually difficult to ensure transparency, and as the amount of particles added increases, the surface protective layer resin and the refraction of the particles to be added It tends to cause white turbidity due to the difference in the rate and a decrease in gloss due to the loss of surface smoothness.

  As a result, the printing and display applied to the surface of the card base material become unclear, and the problem that necessary information becomes difficult to see easily occurs, and a protective layer is formed depending on the particle size and amount of particles to be added. Processing may be difficult (Patent Document 1, Patent Document 3)

  Although the method of preventing scratches by using a harder resin for the protective layer is an excellent method in terms of ensuring the transparency of the protective layer, it is partially due to the occurrence of new problems in the subsequent process of the card. There were many cases where it could be adopted only for the purpose.

  For example, information such as card number, expiry date, name, etc. that is used for many cards is embossed to form convex characters on the card surface (the area and shape are defined in JIS X6302-1) In some cases, an irregularity of about 0.4 mm to 0.8 mm is formed on the card surface mainly by engraving. However, if the resin of the surface protective layer is hardened, a “crack” of the protective layer occurs in this embossing process. Therefore, the resin that can be used is extremely limited (Patent Document 2).

  Further, since the embossing is performed by stamping, it is accompanied by deformation (elongation) of the base material and the ink film. At this time, a card base made of a thermoplastic resin or an ink film using a thermoplastic resin as a binder can stretch following the deformation, but generally used UV curable offset inks cannot stretch. It may cause “embossing cracking” that causes the coating to crack.

  As a method for solving these problems, Patent Document 4 discloses that a plastic sheet is used as a core base material, a plastic film is laminated on both surfaces thereof, a magnetic tape is stuck on the plastic film on the surface side, and both surfaces are flush with each other by hot pressing. A magnetic card in which a colored concealing layer, a pattern layer, and a surface protective layer are provided on a magnetic card substrate to conceal the magnetic tape, and the uppermost layer of the magnetic tape region is a surface made of a thermosetting resin. There has been proposed a concealment card in which a protective layer is provided by separating a surface protective layer made of a thermoplastic resin as the uppermost layer in the non-magnetic tape region.

  In this card, the protective layer on the magnetic tape region is made of a thermosetting resin having excellent wear resistance, and the protective layer on the non-magnetic tape region is made of a thermoplastic resin that is not easily cracked by embossing. However, since a protective layer divided on the card surface is formed on the card surface, a boundary line between the two is generated, resulting in a poor appearance and a problem in terms of design. It had been.

  Further, as a method for increasing the surface strength, Patent Document 5 discloses that a transfer layer having at least a protective layer and an adhesive layer in this order is formed on one side of a support, and one side of the support is matted. A card has been proposed in which a protective layer is formed on a card using a card transfer film, and the protective layer contains polyester wax powder in which the surface of polyester particles is coated with polyethylene.

Furthermore, in Patent Document 6, both the protective layer and the adhesive layer have a non-crosslinked thermoplastic acrylic resin and a polyvinyl chloride resin, and contain 20% or more of a vinyl chloride resin relative to the acrylic resin component. A card containing a lubricant, PTFE-modified polyethylene wax, has been proposed for the layer.

  In the cards proposed in Patent Documents 5 and 6, the surface resistance of the product is improved, but the emboss crack resistance at the time of manufacture is not improved.

  In particular, in the case of an overprint card, the thickness of a nonmagnetic layer such as a protective layer that can be formed on the magnetic stripe of the card is limited due to the problem of magnetic output necessary for reading. It was difficult to obtain sufficient strength in terms of resistance.

For this reason, when reading information recorded on the magnetic stripe, not only the wear of the protective layer caused by rubbing the magnetic stripe area with the magnetic head, but also the pattern layer and the concealing layer are worn due to wear when used continuously. However, if the wear further progresses, the magnetic recording layer of the magnetic stripe is worn, and the fear that the recorded information cannot be read cannot be avoided by increasing the thickness of the protective layer.
Further, the method of improving the surface resistance by using a material having high hardness such as thermosetting for the protective layer has a problem in terms of workability at the time of manufacturing because it easily causes emboss cracks.

JP-A-10-95864 JP 2003-291494 A JP 2002-155196 A Japanese Patent No. 2812047 JP 2008-94057 A JP 2008-149509 A

  An object of the present invention is to provide an overprint card which is a card having a surface protective layer excellent in scratch resistance and transparency and hardly causes emboss cracks during production.

  In the invention according to claim 1 of the present invention, a plastic sheet is used as a core base material, a plastic film is laminated on both surfaces of the core base material, a magnetic stripe is stuck on the plastic film on the surface side, and both sides are formed by hot pressing. Is an overprint card in which a magnetic stripe is concealed by providing a concealing layer, a pattern layer, and a surface protective layer in this order on the surface side of the card base material, and the surface protective layer is a scaly mica powder. An overprint card comprising a body and covering at least a magnetic stripe.

  The invention according to claim 2 of the present invention is the overprint card according to claim 1, wherein the card surface has an embossed area, and the surface protective layer covers at least the embossed area. .

  The invention according to claim 3 of the present invention is the overprint card according to claim 1 or 2, wherein the surface protective layer contains a thermoplastic resin.

The invention according to claim 4 of the present invention is characterized in that the surface protective layer is composed of two layers, and the inner layer contains scaly mica powder. It is an overprint card.

  The invention according to claim 5 of the present invention is the scale according to any one of claims 1 to 4, wherein the scaly mica powder is obtained by forming a titanium oxide film on natural mica or fluorine phlogopite. It is an overprint card of description.

  The invention according to claim 6 of the present invention is characterized in that the total thickness of the layers provided on the magnetic stripe of the card is 10 μm or less. It is a print card.

  In the overprint card according to claim 1 of the present invention, a plastic sheet is used as a core base material, a plastic film is laminated on both surfaces of the core base material, and a magnetic stripe is stuck on the plastic film on the surface side. This is an overprint card in which a magnetic stripe is concealed by providing a concealing layer, a picture layer, and a surface protective layer in this order on the surface side of the card base that is flush with the press.

  Since this surface protective layer contains scale-like mica powder, even if the card surface comes in contact with other things such as a card reader reading head, the surface will be scratched, making it difficult to see prints and displays. Can be prevented. Thus, an overprint card having a surface protective layer excellent in scratch resistance and transparency can be obtained.

  In addition, since the surface protective layer covers at least the magnetic stripe, it is possible to reduce the running scratches of the magnetic stripe due to friction with the magnetic head, so that the magnetic recording layer is not damaged even after many uses, and normal reading can be performed. It becomes possible to secure.

  The overprint card according to claim 2 of the present invention has an embossed area on the card surface, and the surface protective layer covers at least the embossed area, thereby improving embossability. Emboss cracking of the concealment layer and pattern layer can be prevented.

The overprint card according to claim 3 of the present invention can further improve the embossability by including a thermoplastic resin in the surface protective layer.

  In the overprint card according to claim 4 of the present invention, the surface protective layer is composed of two layers, and the inner layer contains scaly mica powder, so that the hologram pattern and the marking on the outermost surface layer are accepted. The final wear resistance can be improved while ensuring.

  In the overprint card according to claim 5 of the present invention, the scaly mica powder is obtained by forming a titanium oxide film on natural mica or fluorine phlogopite, thereby improving the wear resistance of the surface protective layer. At the same time, a surface protective layer having a pearly luster appearance can be obtained.

  The overprint card according to claim 6 of the present invention secures magnetic characteristics that can be read by a conventional reading device, because the total thickness of the layers provided on the magnetic stripe of the card is 10 μm or less. However, it is possible to make a card with excellent wear resistance.

Schematic sectional view of an example of the overprint card of the present invention (in the case of one surface protective layer) Schematic sectional view of an example of the overprint card of the present invention (in the case of two surface protective layers) Cross-sectional schematic diagram of an example of a conventional overprint card

Hereinafter, an example of an embodiment of an overprint card of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic cross-sectional view showing the layer structure of the overprint card of the present invention when the surface protective layer is a single layer. FIG. 2 is a schematic cross-sectional view showing the layer structure of the overprint card of the present invention when the surface protective layer is two layers.

  The overprint card (10) of FIG. 1 is formed by laminating a plastic film of an outer surface layer base material (2) and a back surface outer layer base material (3) on both surfaces of a plastic sheet to be a core substrate (1). On the surface side of the card substrate (5), on which a magnetic stripe (4) is stuck on a plastic film and both sides are flushed by hot pressing, a silver hiding layer (6a), a white hiding layer (6b), a picture layer ( 6) The surface protective layer (7) containing scale-like mica is sequentially laminated.

  The overprint card (11) in FIG. 2 is formed by laminating a plastic film of a front surface outer layer base material (2) and a back surface outer layer base material (3) on both surfaces of a plastic sheet to be a core base material (1). On the surface side of the card substrate (5), on which a magnetic stripe (4) is stuck on a plastic film and both sides are flushed by hot pressing, a silver hiding layer (6a), a white hiding layer (6b), a picture layer ( 6) In addition to the surface protective layer (7) containing scale-like mica, the surface protective layer (8) not containing scale-like mica is sequentially laminated.

A white or colorless outer surface layer base material (2) and a back surface outer layer base material (3) are bonded to both sides of a white or colorless core substrate (1), and a single plate-like card substrate (5 ).
When a pattern layer is formed between the core substrate and the outer layer substrate, the pattern can be made visible by using a colorless outer layer substrate. Further, the outer layer base material is not necessarily provided on the front and back surfaces, and the card base material may be formed by using only the core base material without using the outer layer base material.

A card substrate with a magnetic stripe can be produced by performing thermoforming after the magnetic stripe (5) is bonded and arranged in advance on the outer surface base material (2).
The bonding of the core substrate and the outer layer substrate may be performed by heat fusion without using an adhesive, or may be performed using an adhesive.

  There are no particular restrictions on the adhesive used for laminating the core base material and the outer layer base material as long as it is generally used. Hot melt, vinyl chloride, vinyl acetate, vinyl alcohol, polyester Examples thereof include polyurethanes, polyurethanes, copolymers or polymer alloys thereof.

  Materials used as the core substrate and outer layer substrate include vinyl chloride, vinyl chloride-vinyl acetate copolymer, copolymer of terephthalic acid, cyclohexanedimethanol and ethylene glycol, terephthalic acid, isophthalic acid and ethylene glycol. Amorphous polyester, polyethylene terephthalate, polybutylene terephthalate, ABS, paper, impregnated paper, and the like comprising a copolymer of the above, or a polymer alloy of the copolymer and polycarbonate and / or polyarylate.

  Typically, a sheet made of a hard polyvinyl chloride resin or a polyester resin (PET-G) is generally used because of its suitability for three-dimensionally marking symbols and characters by embossing. The thickness of the core substrate (1) is usually about 100 to 700 μm.

  Card substrate silver hiding layer from the top of the disposed (5) a magnetic stripe (4) to form the (6a) (see FIG. 1, FIG. 2).

  Examples of the material for the silver hiding layer (6a) include vinyl chloride resin, vinyl acetate resin, vinyl alcohol resin, acrylic resin, polyester resin, polyurethane resin and copolymers thereof, epoxy resin, phenol resin, A material obtained by adding aluminum powder to a resin such as a thermosetting resin such as a melamine resin or an ultraviolet curable resin can be used.

  The aluminum powder to be added is desirably a scaly powder having a particle size (diameter when projected in a direction perpendicular to a plane) in terms of concealment, and the content is 10 mass% to 60 mass% ( The range of (after film formation) is suitable, and the range of 20% by mass to 60% by mass (after film formation) is more suitable.

  If the content is less than 10% by mass, the magnetic stripe (4) cannot be concealed, and if it exceeds 60% by mass, the silvery concealment layer (6a) tends to cohesively break. The film thickness of the silver hiding layer is preferably in the range of 1.0 μm to 5.0 μm, and more preferably in the range of 1.0 μm to 2.5 μm.

  Forming the white concealing layer (6b) if necessary over the card substrate (5) Silver concealing layer formed on the (6a). White hiding layer is provided in order to increase the expression effect of simultaneous pattern layer when complementing the concealing effect of the magnetic stripe by silver hiding layer.

  As the material of the white hiding layer (6b), thermoplastic resin such as vinyl chloride resin, vinyl acetate resin, vinyl alcohol resin, acrylic resin, polyester resin, polyurethane resin and copolymers thereof, epoxy resin, phenol resin, A material obtained by adding titanium oxide as a pigment to a resin such as a thermosetting resin such as a melamine resin or an ultraviolet curable resin can be used.

The content of titanium oxide to be added is preferably in the range of 10% by mass to 60% by mass (after film formation), and more preferably in the range of 20% by mass to 60% by mass (after film formation).
If the content is less than 10% by mass, the magnetic stripe (4) cannot be concealed, and if it exceeds 60% by mass, the white concealment layer (6b) tends to break down. The coating thickness of the white hiding layer is preferably in the range of 1.0 μm to 5.0 μm, and more preferably in the range of 1.0 μm to 2.5 μm.

The picture layer (6) is an ink layer constituting the visual information necessary for the card and a picture such as a decorative picture, and is usually printed on the card base (5) by a known printing method such as an offset printing method or a screen printing method. Applied. As the ink in this case, well-known inks such as polyester, acrylic, and vinyl chloride based on the base material and printing method can be used.
Of course, it is also possible to perform adhesion improvement treatment such as corona treatment and anchor treatment on the planned printing surface of the card base (5) as necessary.
The total thickness of the coating on the pattern layer is determined by the printing method and pattern, but is preferably in the range of 0.1 μm to 2.0 μm from the viewpoint of workability.

  In the overprint card of the present invention, a transparent resin layer as a protective layer is formed on the outermost surface of the card base (5) on the magnetic stripe side. You may provide this surface protective layer on both surfaces of a card | curd base material as needed.

  This surface protective layer (7) is made of a coating containing a thermoplastic resin and scaly mica powder (hereinafter referred to as mica) as essential components. Examples of the thermoplastic resin used include vinyl chloride resin, vinyl acetate resin, vinyl Examples thereof include thermoplastic resins such as alcohol resins, acrylic resins, polyester resins, polyurethane resins, and copolymers thereof.

The content of mica added to the thermoplastic resin of the surface protective layer (7) is 5% by mass to 40% by mass.
(After film formation) is preferable, and 10% by mass to 30% by mass is more preferable.

Since mica has a flat shape, when it is mixed in a thermoplastic resin and coated with a surface protective layer, it has a characteristic that it is easily oriented parallel to the surface of the card substrate that is the surface to be coated. Furthermore, since mica is crystallized compared to the resin base material, it is strong in strength.
For this reason, the surface protective layer has a high-strength mica flat surface that easily appears on the surface of the resin layer, thereby improving the wear resistance.

  If the content of mica in the surface protective layer is 5% by mass or more, the effect of improving the wear resistance necessary for the surface protection of the card is exhibited. However, if the content is 40% by mass or more, cohesive failure tends to occur. Further, the transparency of the pattern layer is also lowered due to the lower transparency of the surface protective layer.

  It is known that when mica is contained in a state of being oriented as a matrix in a resin coating, the tensile modulus of the coating in the orientation direction is generally improved. In addition, it is known that cracking of an ultraviolet curable offset printed pattern layer during embossing of an overprint card is unlikely to occur when there is a layer having a higher tensile elastic modulus than the upper layer of the pattern layer.

When the layer having a high tensile elastic modulus is on the surface layer, it is difficult to be deformed when stress is applied by embossing, and therefore, the stress applied to the pattern or the like is also reduced, making it difficult to generate emboss cracks.
This effect is manifested by containing 5% by mass or more of mica in the surface protective layer. However, if it exceeds 40% by mass, cracking due to the brittleness of the surface protective layer tends to occur.

  In addition to mica, waxes such as polyethylene and PTFE can be added to mica as additives to be added to the surface protective layer, and by adding these, the friction on the card surface is reduced. And durability can be improved.

  The scale-like mica powder (mica) used in the overprint card of the present invention may be natural mica or synthetic mica, but non-swellable is suitable for this purpose. In terms of not impairing the transparency of the surface protective layer, colorless ones are excellent in design, but colored ones can also be used. As the non-swellable mica, for example, fluorine phlogopite, potash tetrasilicon mica and the like can be preferably used.

  The mica particle size is preferably 500 μm or less, and more preferably 200 μm or less. When the particle size of mica is larger than 200 μm, the design property is deteriorated due to a decrease in transparency of the surface protective layer, and when the particle size exceeds 500 μm, the phenomenon becomes more remarkable.

  In addition, mica particles covered with a metal oxide film can be used. Examples of the metal oxide include titanium oxide and iron oxide.

  As shown in FIG. 2, in the overprint card of the present invention, the surface protective layer can have a two-layer structure corresponding to the presence or absence of mica.

A thermoplastic resin layer containing mica is likely to cause leafing (surface uneven distribution), which may cause a problem of poor acceptability (shape reproducibility) when a hologram or imprint is transferred.

For this problem, the surface protective layer is composed of two layers, and the surface protective layer (7) of the outermost surface protective layer (8) and the inner surface protective layer (7) is a mica-containing layer. Can be solved.

  If it does in this way, abrasion resistance of the card | curd surface can be hold | maintained by the surface protective layer (7) containing a mica, ensuring the shape reproducibility at the time of transcription | transfer with the surface protective layer (8). That is, since the outermost surface protective layer (8) does not contain mica, the wear resistance of the surface is reduced, but when this layer is scraped off, the mica of the inner surface protective layer (7) is not on the surface. Abrasion resistance can be demonstrated when it comes out.

In the overprint card of the present invention, the surface protective layer (7) or (8) is preferably formed on the entire surface of the card. In this case, since there is no boundary between the region having the surface protective layer and the region without the surface protective layer, it is preferable from the viewpoint of appearance as well as surface resistance.
However, the formation region of the surface protective layer can be formed in a halftone dot shape or a partial shape instead of the entire surface as required.

  In the overprint card of the present invention, since a structure in which mica is added to a transparent thermoplastic resin is used as a surface protective layer, a distinctive design feeling is obtained in terms of appearance as compared with the case of a normal transparent resin layer. I can do it. For example, it is possible to pearl luster-like appearance by the transparent fluorine phlogopite be used as coated with titanium oxide film as mica added.

  Furthermore, when the design of the pattern layer (6) on the white hiding layer (6b) is based on white, the pearl luster is emphasized, and an overprint card with more excellent design can be obtained.

  In the case of a configuration that conceals the magnetic stripe, in a conventional overprint card, a white concealment layer (6b) is formed on a silver concealment layer (6a) containing aluminum powder. It was necessary to increase the thickness of the white hiding layer.

  On the other hand, in order to stabilize the reading of magnetic data, the total film thickness of the nonmagnetic layer formed on the magnetic stripe (4) is limited, and it is usually desirable to be 10 μm or less.

  For this reason, in the overprint card of the present invention, by adding mica for improving the wear resistance to the surface protective layer (7), the surface protective layer required for realizing the required wear resistance is added. The film thickness could be reduced to 3 μm or less, for example. Accordingly, a card having a better design can be realized by increasing the thickness of the white hiding layer (6b) in the total thickness of the nonmagnetic layer on the magnetic stripe (4).

  Of course, the overprint card of the present invention may be a card having an IC chip as well as a magnetic stripe.

Embodiments of the present invention will be described below with reference to some examples.
<Example 1>

  Thickness made of a polymer alloy of PET-G and polycarbonate in which magnetic stripes (4) are arranged at predetermined positions on both sides of the core substrate (1) made of a polyester (PET-G) sheet having a thickness of 0.6 mm. Outer layer base materials (2) and (3) having a thickness of 0.1 mm were arranged, and a card base material (5) having a multi-faced arrangement having a thickness of 0.8 mm was formed by thermoforming.

On the surface of the card substrate (5) on the magnetic stripe (4) side, a silver hiding layer (6a) was printed with the following ink so as to have a dry film thickness of 1.5 μm by screen printing. In addition, unless there is particular notice, a part is a mass part.

<Silver hiding layer ink>
・ Resin-coated aluminum paste 2173A (Showa aluminum powder) 15 parts ・ SS8 WAC (Toyo Ink Co., Ltd .: salted vinyl acetate) 85 parts

The white hiding layer (6b) was printed on the surface of the silver hiding layer (6a) of the card substrate (5) with the following ink so as to have a dry film thickness of 4.0 μm by screen printing.
<White masking layer ink>
SS8 Conch 611 White (Toyo Ink Manufacturing: Salt Vinegar + Titanium Oxide pigment)

The pattern layer (6) was printed on the surface of the white hiding layer (6b) of the card substrate (5) with the following ink so as to have a dry film thickness of 0.5 μm by offset printing.
<Pattern layer ink>
・ FDO HF1 (each color) (Toyo Ink Manufacturing)

The surface protective layer (7) was printed on the surface of the pattern layer (6) of the card substrate (5) with the following coating agent so as to have a dry film thickness of 1.5 μm by screen printing.
<Surface protective layer coating agent>
・ TT118 Process Varnish (Toyo Ink Manufacturing: Polyurethane-Vinyl Acetate) 100 parts ・ Iriodin221 RutileFineBlue (Merck: Mica + Titanium Oxide Coating) 10 parts ・ UR240B (Toyo Ink Manufacturing: Isocyanate) 10 parts ・ Additive 180 (Toyo Ink Manufacturing) : Polyethylene wax) 5 parts

  The card substrate on which the above layers were laminated was thermoformed with a laminating press at 125 ° C. and 2.0 atm for 20 minutes, and was cut into small pieces with a male and female mold puncher to produce an overprint card.

<Example 2>
An overprint card was prepared in the same manner as in Example 1 except that the surface protective layer coating agent was changed to the following composition.
<Surface protective layer coating agent>
-TT118 process varnish (Toyo Ink Manufacturing: Polyurethane-vinyl chloride) 100 parts-PDM-800 (Topy Industries: Mica) 10 parts-UR240B (Toyo Ink Manufacturing: Isocyanate) 10 parts-Additive 180 (Toyo Ink Manufacturing: Polyethylene) Wax) 5 parts

<Example 3>
An overprint card was prepared in the same manner as in Example 1 except that the surface protective layer coating agent was changed to the following composition.
<Surface protective layer coating agent>
・ SS8 WAC varnish (Toyo Ink Manufacturing: Salt Vinegar) 100 parts ・ PDM-800 (Topy Industries: Mica) 10 parts ・ Additive 180 (Toyo Ink Manufacturing: Polyethylene wax) 5 parts

<Example 4>
The surface protective layers (7) and (8) were printed on the surface of the pattern layer (6) of the card substrate (5) by screen printing with the following coating agent in this order so as to have a dry film thickness of 1.5 μm. Produced an overprint card in the same manner as in Example 1.
<Surface protective layer (7) coating agent>
・ TT118 Process Varnish (Toyo Ink Manufacturing: Polyurethane-Vinyl Vinegar) 100 parts ・ Iriodin221 RutileFineBlue (Merck: Mica + Titanium Oxide Coating) 10 parts ・ UR240B (Toyo Ink Manufacturing: Isocyanate) 10 parts <Surface protective layer (8) coating Engineering agent>
TT118 process varnish (Toyo Ink Manufacturing: Polyurethane-vinyl chloride) 100 parts UR240B (Toyo Ink Manufacturing: Isocyanate) 10 parts Additive 180 (Toyo Ink Manufacturing: Polyethylene wax) 5 parts

<Comparative Example 1>
An overprint card was prepared in the same manner as in Example 1 except that the surface protective layer coating agent was changed to the following composition.
<Surface protective layer coating agent>
TT118 process varnish (Toyo Ink Manufacturing: Polyurethane-vinyl chloride) 100 parts UR240B (Toyo Ink Manufacturing: Isocyanate) 10 parts Additive 180 (Toyo Ink Manufacturing: Polyethylene wax) 5 parts

<Comparative example 2>
An overprint card was prepared in the same manner as in Example 1 except that the surface protective layer coating agent was changed to the following composition.
<Surface protective layer coating agent>
・ SS8 WAC varnish (Toyo Ink Manufacturing: Salt Vinegar) 100 parts ・ Additive 180 (Toyo Ink Manufacturing: Polyethylene wax) 5 parts

A magnetic head pass test and an embossing test were performed by the following methods using the overprint cards created in the above-described examples and comparative examples. The results are shown in Tables 1 and 2.

<Magnetic head path test>
Test method: Insert and remove with a card reader and visually evaluate the surface scratches after insertion and removal a predetermined number of times.
Tester: Sankyo Seiki's motorized card reader (for ATM)
Model No. MCT141-1A6612
Judgment criteria: ○ Some magnetic head running scratches are seen
△ Magnetic head running scratches are conspicuous
× Part of the pattern can be removed. Result: Table 1

<Embossing test>
Test method: After holding a card reader with a black solid pattern layer at 0 ° C. for 1 hour,
Ebossing is performed and the presence or absence of emboss cracks is visually evaluated.
Tester: Nippon Data Card card issuing machine
Model number DC9000
Embossed content: continuation of characters from 0 to 9 in all areas of “identification number area (region 1)” and “name and address area (area 2)” defined in JIS X6302-1 embossed area. Without
× Emboss crack occurrence Result: Table 2

<Comprehensive evaluation result>
The overprint card having the surface protective layer of the embodiment of the present invention has an improved magnetic head path life compared to the card of the comparative example, and can further prevent emboss cracks during embossing and ensure the embossing characteristics. It was.

  As described above, according to the present invention, it is possible to provide an overprint card that is a card having a surface protective layer excellent in scratch resistance and transparency and hardly causes emboss cracks during production.

DESCRIPTION OF SYMBOLS 1 ... Core base material 2 ... Front surface outer layer base material 3 ... Back surface outer layer base material 4 ... Magnetic stripe 5 ... Card base material 6 ... Picture layer 6a ... Silver color hiding layer 6b ... White hiding layer 7 ... Surface protection layer 8 ... Surface protection layer 9 ... Surface protective layer 10 ... Overprint card 11 ... Overprint card 12 ... Overprint card

Claims (6)

  Using a plastic sheet as a core base material, a plastic film is laminated on both sides of the core base material, a magnetic stripe is pasted on the plastic film on the surface side, and both sides are flush with each other by hot pressing. And an overprint card in which a concealing layer, a pattern layer, and a surface protective layer are provided in this order to conceal the magnetic stripe, and the surface protective layer includes scaly mica powder and covers at least the magnetic stripe. An overprint card characterized by   The overprint card according to claim 1, wherein the card surface has an embossed area, and the surface protective layer covers at least the embossed area.   The overprint card according to claim 1, wherein the surface protective layer contains a thermoplastic resin.   The overprint card according to any one of claims 1 to 3, wherein the surface protective layer is composed of two layers, and the inner layer contains scaly mica powder.   The overprint card according to any one of claims 1 to 4, wherein the scaly mica powder is natural mica or fluorine phlogopite formed with a titanium oxide film.   The overprint card according to any one of claims 1 to 5, wherein the total thickness of the layers provided on the magnetic stripe of the card is 10 µm or less.

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