JP2001113863A - Rewritable card - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent wear and bruises at a printing to a rewritable card, especially the blurrings of printed characters and images by adhering matters under the use of a thermal head and, in addition, the turning of printing contents to be hard to be seen when a rewritable layer is covered with a coloring layer. SOLUTION: A coloring layer 5 and a surface protective layer 6 are formed by the aggregate of fine area divisions such as that of dots or the like on a card base material 2, onto the under side of which a magnetic recording layer 3 and onto the top side of which a rewritable layer 4 are laminated so as to settle defects.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention belongs to the technical field of a rewritable card having a rewritable (rewritable) coloring layer on the surface.

[0002]

2. Description of the Related Art Bank cards, credit cards, ID cards such as identification cards, driver's licenses, etc., which have already been issued, are issued for lump-sum prepayment at the time of use without specifying a section of transportation. There are a card and a card for prepaid public telephone charges. These cards are set from a commercial point of view, and worldwide agreements are made between the parties concerned. The size of these cards is almost the same as that of business cards, and various standards are set.

[0003] Some cards can additionally record data that changes each time. In the card issued for the lump-sum prepayment when the above-mentioned transportation section is not specified, the boarding section, the fare, and the balance are printed at different places each time. Further, for example, in the retail business, a point number is given to a customer at a fixed rate with respect to the sales amount, and the point number is recorded on a rewritable layer provided on the surface of the card in order to give preferential treatment according to the point number. Have been.
Normally, in addition to the number of points, variable information such as an individual's name, identification number, date of birth, map, etc., and fixed information such as the issuing company name and logo are also recorded.

[0004] The recording method on the rewritable layer of the card includes (1) a thermoreversible method using a thermal head;
There are (2) a magnetic capsule method and (3) a magnetic powder method. Above all, the thermoreversible method of (1) is typically a method in which a color former (electron donor) and a developer (electron acceptor) melt and contact when heated, and react. It gives a clear and high-density color, and is often used for transportation tickets as well as rewritable cards.

However, in any of the above methods, the recording / erasing head and the rewritable card perform recording and erasing while relatively moving, so that the surface of the rewritable card is worn by the recording head, It is inevitable that they will be damaged. Particularly, in the case of the method (1), the temperature of the thermal head becomes high, so that abrasion or melting of the surface of the rewritable card causes deposits to accumulate on the running surface of the thermal head. It is not reliably transmitted to the rewritable card, resulting in a disadvantage that printed characters and images are blurred. Also, since the printed part is exposed to high temperatures, the surface condition changes even if it is not scratched, for example, a difference in gloss occurs, and even if the printed characters or images are erased, the printed trace remains. There is.

Further, when the rewritable layer of the rewritable card is not printed or the number of printed characters or images is small, the blank portion of the unprinted portion is conspicuous and monotonous cannot be avoided. In order to solve this point, it is good to cover the rewritable layer with a colored layer,
When a uniform colored layer or a pattern composed of the uniform colored layer is formed as the colored layer, a disadvantage occurs in that printed characters and images are difficult to see even if the colored layer has transparency. This is because, in each of the above-described methods, it is difficult to perform printing with a high contrast with the background color, such as normal printed characters.

[0007]

SUMMARY OF THE INVENTION According to the present invention, when printing on a rewritable layer of a rewritable card, the surface is prevented from being worn or scratched. Another object of the present invention is to eliminate the disadvantage that printed characters and images are blurred due to substances attached to the thermal head. Another object of the present invention is to eliminate the disadvantage that printed characters and images are difficult to see when the rewritable layer of the rewritable card is covered with a colored layer.

[0008]

In order to solve the above-mentioned problems, in the present invention, a colored layer is formed by, for example, printing dots or the like in which areas having a small area are gathered, and a surface protective layer is formed in the same manner as the colored layer. In addition, the above-mentioned problem can be solved by forming the area having a small area by halftone dots of printing or the like, or by forming irregularities with a pitch comparable to the halftone dot on the surface.

According to a first aspect of the present invention, a rewritable layer is laminated on at least a part of a surface of a card base material, a colored layer is laminated on at least a part of the rewritable layer, and at least a rewritable layer of an uppermost layer is formed. A surface protection layer is laminated on part of the surface, and the colored layer is formed by assembling a small area area, and the surface protection layer has minute irregularities on the surface. The present invention relates to a rewritable card characterized by the following. The second invention is characterized in that a rewritable layer is laminated on at least a part of the surface of the card base material, a colored layer is laminated on at least a part of the rewritable layer, and at least a part of the uppermost layer is a part of the rewritable layer. The present invention relates to a rewritable card, wherein a surface protective layer is laminated thereon, and the colored layer and the surface protective layer are each formed by assembling minute areas. A third invention relates to the rewritable card according to the first or second invention, wherein a rewritable layer is laminated on the entire surface of the card base material. A fourth invention relates to the rewritable card according to the first or second invention, wherein a rewritable layer is laminated on one side of the surface of the card base material. A fifth invention relates to the rewritable card according to the first or second invention, wherein a strip-shaped rewritable layer is laminated on the surface of the card base material. A sixth invention relates to the rewritable card according to the first or second invention, wherein a rewritable layer is laminated on the surface of the card base material, leaving a margin around the surface.

[0010]

1 to 5 are views showing the structure of a rewritable card of the present invention. FIG. 1 is a sectional view showing the basic structure of a rewritable card of the present invention.
2 to 5 are plan views showing a state in which the rewritable layer is covered with the coloring layer. FIGS. 6 and 7 are cross-sectional views showing the structure of the rewritable card according to the embodiment of the present invention.

As shown in FIG. 1, a rewritable card 1 according to the present invention basically has a rewritable layer 4 laminated on a card base material 2, and covers the rewritable layer 4 with a colored layer 5 and a surface protection layer. The layers 6 are sequentially laminated, and the card base 2 may have the magnetic recording layer 3 on the lower surface.

The rewritable layer 4 may be provided at least on a part of the card base material 2, and the colored layer 5 may be provided at least on a part of the rewritable layer 4.
Therefore, the coloring layer 5 may be on the exposed portion of the card base 2 which is not covered with the rewritable layer 4.

The surface protective layer 6 only needs to be on the uppermost surface of the rewritable card 1. Therefore, in a portion where nothing is laminated on the card substrate 2, it is directly laminated on the card substrate 2 and the rewritable layer 4 may be laminated on the rewritable layer 4 in a portion where the rewritable layer 4 is exposed.
In a portion where the coloring layer 5 is laminated thereon, the layer may be laminated on the coloring layer 5.

FIGS. 2 to 5 show examples in which the rewritable layer 4 and the colored layer 5 on the card base 2 overlap each other.

Assuming that the rewritable card 1 shown in FIG. 2 has a rewritable layer 4 laminated on the entire surface of the card base material, The rewritable card 1 has a zigzag-shaped outline margin at the center and a colored layer 5 laminated around the rest. As shown in FIG. 2, the rewritable layer 4 is laminated on the entire surface of the card base material. A rewritable layer 4 having a size larger than the size of the card or a rolled card base material for the roll is prepared. This is suitable for forming a rewritable layer 4 in a laminated form on the substrate, and forming a colored layer 5 and a surface protective layer to be described later. This is because forming the rewritable layer 4 in a uniform and uniform manner is more efficient in manufacturing than forming the rewritable layer 4 partially or in a predetermined shape.

In the rewritable card 1 shown in FIG. 3, the rewritable layer 4 is laminated up to the position indicated by the broken line so as to cover a portion larger than the upper half when the card is placed in the landscape orientation. The portion where the layer 4 is not laminated is left. The coloring layer 5 covers a portion larger than the lower half of the rewritable card 1, that is, covers the exposed portion of the card substrate without the rewritable layer 4 and the lower portion of the rewritable layer 4, and The layers 4 are stacked so that most of the layers 4 are exposed. It should be noted that the rewritable layer 4 is not divided up and down as described above.
Laminated either on the left or right, from the part where the rewritable layer 4 is not laminated to a part on the rewritable layer 4,
The coloring layer 5 may be laminated.

In the rewritable card 1 shown in FIG. 4, when the card is placed horizontally, a strip-shaped rewritable layer 4 (portion defined by upper and lower dashed lines) is stacked almost horizontally in the middle of the upper and lower sides. The upper and lower colored layers 5, 5 are laminated so as to cover all exposed portions of the card substrate without the upper and lower rewritable layers 4 and to cover the upper and lower ends of the rewritable layer 4.

In the rewritable card 1 shown in FIG. 5, a rewritable layer 4 (the outline is shown by a broken line) smaller in size than the card base material is laminated while leaving a margin of the card base material around the rewritable card. The rewritable layer 4 is laminated on all the blank portions on the card base material and on the periphery of the rewritable layer 4 except for the central portion of the rewritable layer 4.

In the examples cited above with reference to FIGS. 2 to 5, the rewritable layer 4 is one continuous layer, but two or more rewritable layers 4 may be discontinuously laminated.
In each of the examples cited above with reference to FIGS. 2 to 5, the rewritable layer 4 is not covered with the colored layer 5, that is, has an area that appears to be exposed. It is normal to make the exposed area correspond to the area to be printed. However, printing may be performed on the rewritable layer in the portion covered with the coloring layer 5. It is covered with the coloring layer 5 and may be printed from above the coloring layer 5 without fail.

If the optical density of the colored layer 5 is too high, the characters and images printed on the rewritable layer 4 become invisible. Therefore, depending on the optical reflection density of the characters and images printed on the rewritable layer 4, The optical density is preferably 0.8 or less, which is comparable to the recording density of the rewritable layer 4.

The lower limit of the optical density of the colored layer 5 is generally difficult to determine, but if it is too low, there is no point in stacking the colored layer 3. Further, when the rewritable layer 4 is recorded by heat, the so-called fogging phenomenon, in which the entire color develops slightly with time even in an environment of about room temperature, cannot be avoided. Therefore, when a part of the rewritable layer 4 is covered with the colored layer 5, it is preferable to provide a function of making the fog inconspicuous, and the degree of fog is about 0.2 in optical density. The optical density of No. 5 is also preferably 0.2 or more.

In this specification, the optical density of the colored layer 5 is an optical density obtained by measuring the light incident at an incident angle of 45 ° from directly above and measuring the reflection by diffused light. It is also possible to measure what is printed on a white sheet whose printability is similar to that of the card base material 2 or the rewritable layer 4 or to measure the optical density of the base and calculate it from the optical density measured by overlapping the base. Good.

In the above description, the colored layer 5 has been described assuming a uniform colored layer having no pattern.
From the viewpoint of the visibility of the printed characters and images, they may not be uniform and may have a gradation portion or a pattern layer having a pattern.

The pattern layer may be a uniform colored layer formed as a cut-out pattern, a pattern not formed of a cut-out pattern but having a different hue or shade of color, or a uniform colored layer. The patterns may be formed on the layer, or the patterns may be arbitrarily combined.

The colored layer 5 is formed by assembling a colored area having a small area such as a halftone dot for printing, including a pattern layer and a uniform colored layer. Is more preferable. To explain the size of the “small area”, a general printing dot is 0.1 mm
Assuming squares of about 0.25 mm (this dimension is derived from the number of lines in normal printing and indicates the pitch of halftone dots), each square is formed in a square (or dot) shape such as a circle or the like. When expressing shades of color,
The area ratio (= halftone dot%) where the dots occupy the squares of the grid ranges from a maximum of 100% to a minimum of about 1%.
The shape of the halftone dot itself can be created arbitrarily. The halftone dots may not be independent, for example, a chain shape in which circular dots are slightly overlapped at their ends, or independent, but not necessarily having a constant pitch, A dot corresponding to a grain screen in printing is also regarded as a halftone dot. These are mainly formed by printing such as offset printing, but may be formed by means other than printing.

In the present invention, when the colored layer 5 is formed by assembling the colored areas having a small area as described above, the area ratio is 20% to 90%, more preferably 40%. By setting it to 70%, a part of a printed character or a part of an image is directly visible from between adjacent halftone dots, so that visibility is increased. However, as for the size of characters and images, it is assumed that the characters are viewed at a normal clear vision distance (approximately 25 cm).
It is assumed to be about 0 times.

When the colored layer 5 is formed by assembling a colored area having a small area such as a printing dot, the optical transmission of the dot itself is not so high.
It is preferable from the viewpoint of visibility of a part of printed characters and an image.
In particular, when the area ratio is high, it is preferable that the optical density is not so high and that the film has transparency, that is, transparency.

FIGS. 6 and 7 are views showing a state in which the surface protective layer 6 is formed as the uppermost layer of the rewritable card 1. FIG. The surface protective layer 6 may be formed as a uniform layer. However, if the surface protective layer 6 is uniform, the surface is easily worn and wear is conspicuous. Further, even if printing is performed with a thermal head and then erasing is performed, there is a defect that a trace remains, so that the surface of the surface protective layer 6 preferably has minute irregularities.

The surface protective layer 6 shown in FIG.
As described in the description of the preferred example of the colored layer 5,
Areas having a small area, such as printing dots, are formed as a group. The surface protective layer 6 is formed by laminating a composition mainly composed of a resin as described later in a halftone dot shape by printing or the like to form irregularities, and is colorless and transparent or light-colored and transparent. Alternatively, instead of printing or the like, it may be formed and transferred on a separate transfer sheet base. In the surface protective layer 6 formed by halftone dots,
The size of the halftone dot is 2% in area ratio as in the colored layer.
It is 0% to 90%, more preferably 40% to 70%.
Further, the height of the surface protective layer 6 is preferably 1 to 10 μm, more preferably 1 to 3 μm. In FIG. 6, the cross-sectional shape of each halftone dot forming the surface protective layer 6 is drawn as a square, but it is more preferable that the tip is rounded.

The surface protective layer 6 'in FIG. 7 has substantially the same surface unevenness as that shown in FIG. 6, but is not formed with halftone dots apart as shown in FIG. Are formed continuously, provided that they have irregularities 9 on the surface. The planar size and the vertical cross-sectional shape of the surface irregularities 9 are the same as those described with reference to FIG. 6, and the height difference of the irregularities 9 is almost the same as the numerical value of the height of FIG. 6. is there. The surface protective layer 6 ′ as shown in FIG. 7 is formed by a method such as pressing a concave and convex mold after coating, or a resin or inorganic transparent particle having a size comparable to the pitch of the concave and convex. It can be formed by coating or pasting a separately formed uneven sheet.

If the surface protective layer 6 or 6 ′ has the irregularities as described above, the area of contact with the recording head is smaller than in the case of the surface protective layer formed in a flat shape, and thus the surface protection layer 6 or 6 ′ has abrasion. Even if it is changed, the area is small, so it is not conspicuous, and if the convex section is rounded, a change due to abrasion or the like may occur on a plane other than the horizontal plane parallel to the card base material 2. Therefore, in the surface protective layer formed entirely in a planar shape, there is an advantage that the change is less noticeable as compared to the change occurring in the horizontal plane.

A card base 2, a rewritable layer 4, a colored layer 5, which basically constitutes the rewritable card 1 of the present invention,
Next, the materials and the like of the surface protective layers 6, 6 'will be described.

As the card base material 2, paper, a plastic sheet, a metal foil or a metal plate or the like is used alone or in combination. It is selected and used in consideration of the required rigidity, flexibility, processing adhesiveness, printability, and if necessary, embossability, depending on the application. In general, a sheet made of a vinyl chloride resin or a sheet made of a polyester resin such as polyethylene terephthalate is used from the viewpoint of suitability for processing and use, but sheets of other resins can also be used. As an example, a polyethylene terephthalate resin sheet having a thickness of 0.25 mm is preferably used.

The rewritable layer 4 is made of one of three types of materials: (1) a leuco dye, (2) a polymer / organic low-molecular dispersion, and (3) a liquid crystal.

(1) In the case of a leuco dye system, color development / decoloration is based on a combination of a leuco dye and an acidic compound, and a rewritable layer is formed from a composition in which these compounds are mixed with a polymer binder. There are competitive reaction systems using amphoteric compounds and phase separation systems using long-chain alkyl acidic compounds.

In the competitive reaction system, a phenolamine salt is used as an amphoteric compound, and the coloring reaction is performed by a phenol group.
This utilizes the fact that the decoloration reaction proceeds by an amino group. Here, as the leuco dye, a triarylmethane-based compound (a crystal violet lactone in this range is well known), a diphenylmethane-based compound, a xanthene-based compound, a spiro-based compound, a fluoran-based compound, or the like is used. At this time, since the speed of the coloring reaction is faster than the speed of the decoloring reaction, the color is fixed in a colored state when heated and rapidly cooled, and is fixed in a decolored state when heated and gradually cooled. .

In the phase separation system, the compatible state and the incompatible state of the leuco dye and the long-chain alkyl acid compound are controlled by a difference in cooling rate. When the mixture is heated and gradually cooled in a compatible state, phase separation occurs, the mixture becomes incompatible, and the color is erased. Here, as the long-chain alkyl acidic compound, a phenol compound having a long-chain alkyl group or a phosphonic acid compound having a long-chain alkyl group can be used. The long-chain alkyl group preferably has 11 or more carbon atoms in the former case and 14 or more carbon atoms in the latter case.

In actual use, the thermal head is usually 1/100 of that of the special cooling.
After instantaneously heating and heating in the order of 0 seconds,
By cooling at room temperature, "rapid cooling" can be realized, and the above system can be colored. In addition, as for `` cooling down '', if cooling after heating using a heating means having a large heat capacity such as a heat roller, a hot stamp, a heater bar, etc., `` cooling down '' is realized because a given amount of heat is large, Can be erased. In some cases, erasing with a thermal head is also possible by selecting the heating temperature and conditions. In the case of such a leuco rewritable material,
By appropriately selecting the type of leuco dye, black,
It can be colored in various colors such as blue and red.

(2) In the polymer / organic low-molecular dispersion system, a rewritable layer is formed by a composition in which a low-molecular organic material such as a fatty acid is uniformly dispersed in a transparent synthetic resin binder having film-forming properties. To form This layer becomes transparent when given heat is applied thereto by a thermal head or the like and rapidly cooled, and becomes turbid when it is gradually cooled after applying the heat.

As the binder for the synthetic resin, a resin which is transparent, has a film-forming property, and can uniformly disperse and hold a low-molecular organic substance is preferable. For example, polyvinyl chloride, vinyl chloride-vinyl acetate Examples include vinyl chloride resins such as copolymers, vinylidene chloride resins, acrylic resins, and other polyester resins. As the organic low molecular weight substance, various fatty acids and derivatives thereof can be used. Among them, saturated linear fatty acids having 1 carbon atom are preferable.
Those having a melting point in the range of 0 to 30 and a melting point of 30 to 160 ° C. are preferred, and one or two or more kinds can be used. The use of a low-molecular organic substance having a different melting point, for example, monocarboxylic acid and dicarboxylic acid has an advantage that the temperature range for the transparency can be widened.

(3) In the liquid crystal system, a liquid crystal is prepared by dispersing a smectic liquid crystal in a polymer matrix.
A polymer composite film is formed and used. In this liquid crystal system, the liquid crystal molecules are brought into a random alignment state or an alignment state by using heat and an electric field, and in these states, the properties of light scattering and light transmission are used, respectively. Further, a dichroic dye can be added for the purpose of improving the contrast and coloring, and a rewritable layer having excellent visibility can be obtained.

Any of the above (1) to (3) can be used according to the application. Among them, the leuco dye system of (1) and the liquid crystal system of (3) can perform color display, so that visibility is high. Is better in terms of Prior to forming the four rewritable layers, a primer layer or an intermediate layer of a synthetic resin may be formed in advance.

The rewritable layer 4 is formed on the card base 2
In addition to the above, the rewritable layer may be formed on a temporary base material so that the rewritable layer can be peeled off, and then may be transferred. It may be done in a wearing manner. When it is formed on another thin base sheet, the base sheet side may be bonded to the card base 2 or the base sheet side may be stuck to the card base in such a direction as to be outside. On the other hand, in the latter, the base sheet functions as a protective layer, whereas in the former, the surface is exposed to the outermost surface, so that the surface may be further covered with a protective layer. The thickness of the rewritable layer 4 is about 0.3 mm.

In any case, it is preferable that a protective layer 7 for protecting the rewritable layer is laminated on the rewritable layer 4 on the card base material 2. Depending on the solvent in the ink composition used to form the layer 6, the rewritable layer 4
It is also preferable from the viewpoint of avoiding impairment or color development. Accordingly, the resin constituting the protective layer 7 may be dissolved or swelled by a solvent which may cause an adverse effect on the lower rewritable layer 4 among the solvents for forming the layer laminated on the protective layer 7. It is better to use a solvent that does not allow the solvent to penetrate into the lower layer.

As described above, the coloring layer 5 is mainly formed by printing, but may also be formed by coating, spraying, dip coating, which is a kind of coating, and the like. Therefore, the decoration layer 3 itself is formed by drying and solidifying the ink or paint, and is used for bonding the pigment or / and the dye with the colorant and the colorant and the printing medium or the coating medium. And a necessary amount of additives such as a crosslinker, extender, or plasticizer that may be added to the binder resin of the ink or the paint. The binder resin is
It is selected and used in consideration of the adhesiveness to the material of the lower layer such as the card base material 2 or the rewritable layer 4, and can be selected from ink compositions and coating compositions used in the card field.

The surface protective layer 6 is a colorless and transparent or colored and transparent resin layer. The resin constituting the surface protective layer 6 may be a thermoplastic resin, but is preferably composed of a thermosetting resin from the viewpoint of durability, particularly abrasion resistance, and the like.
Furthermore, it is more preferable to apply an ionizing radiation-curable composition that cures with ultraviolet light or an electron beam and cure it by irradiation with ultraviolet light or an electron beam. Since the ionizing radiation-curable composition cures quickly, it is preferably used from the viewpoint of reducing adverse effects on the lower layer.

FIG. 6 and FIG. 7 show a rewritable card 1 according to a practical example of the present invention. In these, in addition to the above, the magnetic recording layer 3 is provided on the lower surface of the card base 2. Hiding the hue (usually black or brown),
If necessary, the magnetic concealing layer 8, which is used as a base for printing a precautionary note or the like, is sequentially laminated while also exhibiting a self-cleaning function. The magnetic shielding layer 8 is constituted by using a paint composition or an ink composition in which titanium dioxide or another pigment having a shielding property is mixed with a coloring agent composed of a dye or a pigment. Also, as explained earlier,
On the rewritable layer 4, a rewritable layer protective layer 7 is laminated.

In addition to the above, the card base material 2 may be subjected to various processes performed in producing this kind of card. First, the formation of characters and pictures,
(1) The trade name to indicate the issuer of the card, the name of the card, or the name of the association if it is distributed to members,
(2) The expiration date of the card, a mark to indicate the direction of insertion of the card into the reader / writer, precautionary notes on use, (3) The name of the card holder and the card issue number are formed on the card surface by printing or embossing. You.

The card substrate 2 may optionally be provided with a known recording layer other than the rewritable layer of the present invention. (4)
Holograms and diffraction gratings, (5) a writing layer made of a material easy to write for signature, (6) an optical recording layer recordable by laser light, (7) an IC having an arithmetic unit and a memory unit, L
SI, or (8) an area where an image can be formed by sublimation transfer or pasting of a photograph.

In the present invention, the known recording layer, starting from the formation of the characters and pictures described in (1) above and providing the area capable of sublimation transfer or the like in (8), is used as the card base 2.
May be provided directly on the outermost surface, but when the card base material 2 is integrated by hot pressing, it may be inserted between the sheets. Except for the case where it must be exposed to the outermost surface for recording or the like, it may be possible to prevent damage due to abrasion by forming it inside the outermost surface.

[0051]

According to the first aspect of the present invention, since the colored layer is formed by assembling areas having a small area, the content printed on the lower rewritable layer has high visibility.
Because the surface protective layer has minute irregularities on its surface,
It is possible to provide a rewritable card in which the friction of the recording head is small and is less noticeable even when a change such as abrasion occurs. Claim 2
According to the invention, the colored layer and the surface protective layer are formed by assembling areas having a small area. It is possible to provide a rewritable card that is less noticeable even when a change such as abrasion occurs. According to the third aspect of the invention, in addition to the effects of the first or second aspect of the invention, the printable area is wide, and it is not necessary to form the rewritable layer in a specific shape, so that the production efficiency is high. Rewritable cards can be provided. According to the invention of claim 4, in addition to the effect of the invention of claim 1 or 2, there is no waste of the coloring component of the rewritable layer, and the side where the rewritable layer is not laminated is directed to a design, a notice, or the like. Can provide a rewritable card. Claim 5
According to the invention, in addition to the effects of the invention described in claim 1 or 2, there is no waste of the coloring component of the rewritable layer, and the portion where the rewritable layer is not laminated can be directed to a design, a notice, or the like. Rewritable cards can be provided. According to the sixth invention, in addition to the effects of the invention described in claim 1 or 2, there is no waste of the coloring component of the rewritable layer, and the surrounding portion where the rewritable layer is not laminated is included in the design or notice. Provide a rewritable card that can be turned.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a laminated structure of a rewritable card.

FIG. 2 is a plan view of the rewritable card.

FIG. 3 is a plan view of the rewritable card.

FIG. 4 is a plan view of the rewritable card.

FIG. 5 is a plan view of the rewritable card.

FIG. 6 is a sectional view showing an embodiment of a rewritable card.

FIG. 7 is a sectional view showing another embodiment of the rewritable card.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rewritable card 2 Card base material 3 Magnetic recording layer 4 Rewritable layer 5 Colored layer 6 Surface protective layer 7 Protectable layer of rewritable layer 8 Magnetic concealment layer 9 Unevenness

Claims (6)

[Claims] 1. A rewritable layer is laminated on at least a part of a surface of a card base material, a colored layer is laminated on at least a part of the rewritable layer, and a top layer is formed on at least a part of the rewritable layer. A surface protection layer is laminated thereon, and the colored layer is formed by assembling a small area area, and the surface protection layer has minute irregularities on its surface. Rewritable card. 2. A rewritable layer is laminated on at least a part of the surface of the card substrate, a colored layer is laminated on at least a part of the rewritable layer, and a top layer is formed on at least a part of the rewritable layer. A rewritable card, characterized in that a surface protective layer is laminated on each of the colored layers and the colored layer and the surface protective layer are each formed by assembling a small area. 3. The rewritable card according to claim 1, wherein a rewritable layer is laminated on the entire surface of the card base material. 4. The rewritable card according to claim 1, wherein a rewritable layer is laminated on one side of the surface of the card base material. 5. The rewritable card according to claim 1, wherein a band-shaped rewritable layer is laminated on the surface of the card base material. 6. The rewritable card according to claim 1, wherein a rewritable layer is laminated on the surface of the card base material, leaving a margin around the rewritable layer.