JP2001167234A - Leuco rewrite card - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a leuco rewrite card applied with forgery preventive measures for improving the reliability of the rewrite card forming a picture pattern layer by means of printing, or the like, thereby preventing recorded contents from being fraudulently altered. SOLUTION: In the leuco rewrite card 30, in which a magnetic recording layer 16 is formed on one side of a substrate 15 consisting of polyethylene terephthalate(PET) or the like and a leuco rewrite recording layer 14 having a color developing part 10, an intermediate layer 13 and a print picture pattern layer 12 are laminated on another side, the print picture pattern layer on the color developing part of the leuco rewrite recording layer is printed in the half tone within the range of dots from 10% to 100%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leuco lite card which is provided with a counterfeiting prevention measure aiming at improving the reliability of a rewritable card by preventing alteration of the contents of a printed record.

[0002]

2. Description of the Related Art At present, rewritable cards capable of rewriting the print contents of point cards and the like have become mainstream. Above all, the Leuco Lilite card is superior to the conventional cloudy type in visibility, and is a very effective recording method.

[0003] However, in the conventional leuco lite card, a picture layer by printing or the like is not provided in the portion of the rewritable recording layer. That is, in order to obtain clear visibility of the rewritten recorded contents, a picture layer for making the rewritten recorded contents unclear is not intentionally provided. However, in this case,
It has been a problem that the recorded contents can be easily tampered with a writing instrument or the like.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above-mentioned problems, and provides a picture layer by printing or the like to prevent falsification of print record contents, thereby improving the reliability of a rewritable card. An object of the present invention is to provide a leuco lite card that has been subjected to anti-counterfeiting measures.

[0005]

According to the present invention, there is provided a magnetic recording layer provided on one surface of a substrate made of polyethylene terephthalate (PET) or the like.
In a leuco lite card 30 in which a leuco lite recording layer 14 having a coloring part 10 on the other surface, an intermediate layer 13 and a printed picture layer 12 are laminated, the printed picture layer on the leuco lite recording layer is a halftone dot. Provided is a leuco lite card which is printed in a range of 10 to 100%.

[0008] Further, a leuco lite card is provided, wherein a protective layer 11 is provided on the printed picture layer 12 of the leuco lite card 30.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a printed pattern layer 12 based on a hearton pattern is provided on a leucolite recording layer 14 having a color forming portion 10, and a protective layer 11 is further formed on this layer.
This is a Leuco Lilite card 30 provided with a.

The present invention will be described in detail with reference to the drawings. FIG.
FIG. 1 is an explanatory view showing a cross section of a leuco lite card showing an embodiment of the present invention. As shown in the figure, a magnetic recording layer 16 is provided on one surface of a base material 15 made of polyethylene terephthalate (PET) or the like, and a coloring portion 10 is provided on the other surface.
Card 30 formed by laminating a leucolite recording layer 14, an intermediate layer 13, and a printed picture layer 12 having
And the print pattern layer is printed in the range of 10 to 100% of halftone dots. Further, in the embodiment of the present invention, the protective layer 11 is provided on the printed picture layer.

[0009] With this configuration, since the colored portion of the leucolite recording layer is formed below the printed pattern layer, the printed pattern portion can be visually recognized by being overlapped with the upper layer of the colored portion.

Here, if it is supposed that the recorded content is altered by writing with a writing instrument or the like, the printed pattern is hidden and cannot be visually recognized, and it can be easily determined that the alteration has been made by the additional writing. it can.

Regarding the above-mentioned printed picture layer 12, although it depends on the picture, it is 10 to 100%, preferably 40 to 100%.
A halftone density of 60% is particularly effective. That is, when the print density is increased, the visibility of the recorded content is reduced, and when the print density is reduced, the printed pattern of the upper layer of the rewritten recorded content is difficult to understand, and the forgery prevention effect is reduced.

The rewritable recording layer of the present invention includes:
It is composed mainly of a leuco compound, a color-reducing agent and a binder. First, as the leuco compound, xanthene, spiropyran, lactone, fluoran, sultone, or the like having a partial skeleton such as lactone, sultone, or spiropyran is used. Specifically, crystal violet, lactone, 3-indolino-p-dimethylaminophenyl-6-dimethylaminophthalide, 3-dimethylamino-7-chlorofluoran, 2- (2-fluorophenylfumino) -6- Dimethylaminofluoran, 2-
(2-fluorophenylamino) -6-di-n-butylaminofluoran, 3-dimethylamino-7-cyclohexylaminofluoran, 3-dimethylamino-5-methyl-7-tert-butylfluoran, 3- Dimethylamino-6-methyl-7-anilinofluoran, 3-cyclohexylamino-6-chlorofluoran, 2-alinino-
3-methyl-7-anilylofluoran, 3-pyrrolidino-7-cyclohexylaminofluoran, 3-N-methylcyclohexylamino-6-methyl-7-anililofluoran, 3-N-methylpentylamino-6 -Methyl-7-anilylofluorane and the like, but are not limited thereto. Also, two or more of these may be used simultaneously.

[0013] The color-depressing agent is a compound having both an acidic group comprising a phenolic hydroxyl group or a carboxyl group and a basic group comprising an amino group. It develops and reduces color. It may be present as a basic group functional group or as a part of a chloride compound. As the color-reducing agent having an amino group as a functional group,
For example, aminobenzoic acids, hydroxysalicylic acids,
Examples include acids such as gallic acid and bisphenol acetic acid and bases and salts or complex salts such as aliphatic amines, phenylalkylamines and tolylalkylamines. In addition, two or more of these color reducing agents may be used simultaneously. The ratio between the leuco compound and the color-reducing agent is not particularly limited, but is in the range of 1 to 20 parts by weight, preferably 2 to 10 parts by weight, of the color-reducing agent per 1 part by weight of the leuco compound.

The rewritable recording layer may be of any form as long as it contains the above-mentioned leuco compound, the color-reducing agent and the binder resin. Usually, the rewritable recording layer is formed by dissolving or dispersing in water or an organic solvent. It is formed by coating and drying on a support. At this time, the binder resin is not particularly limited, for example, acrylic resin, polyester,
Polymers such as polyurethane, polyurea, melamine resin, polycarbonate, polyamide, polyvinyl pyrrolidone, polyvinyl alcohol, polyvinyl chloride, polyvinyl butyral, and waxes such as paraffin wax, polyethylene wax, carnauba wax, microcrystalline wax, and stearamide. Other than
Examples include celluloses such as hydroxyethyl cellulose, gelatin casein, starch, and rubbers.
Among these resins, it is particularly preferable to use a thermosetting resin or a heat-resistant resin in order to improve the repetition characteristics and heat resistance of the reversible can heat recording material. Of course, two or more of these resins may be used in combination.

Next, the principle of recording and erasing of the rewritable recording layer will be described. Heat energy, for example, high-temperature (300 ° C. or higher), short-time (several milliseconds to hundreds of milliseconds) heat treatment by a thermal head or a laser. Is applied to the rewritable recording layer, hydrogen ions are released from the phenolic hydroxyl group or carboxyl group of the developer. This hydrogen ion reacts with the leuco compound and forms a colored image when the leuco compound is opened. Further, another thermal energy such as a low temperature (for example, a temperature near or above the melting point of the color-reducing agent, for example, 100 to 200
When the heat treatment is performed for a long time (1 second or more), the hydrogen ion is deprived by the action of the amino group of the color-developing agent, and the leuco compound is closed to form a colorless and disappears. Further, by subjecting the erased recording layer to heat treatment with heat energy again, an image can be formed again. This image formation and erasing can be performed repeatedly, and the image forming state or the image erasing state is maintained unless thermal energy is applied.

Further, a color erasing aid may be mixed in the above-described rewrite recording layer. The decolorizing aid has a relatively weaker basicity than the color-developing agent that acts at the time of decoloring, and acts on the leuco compound at the time of decoloring to reduce the color. When heat treatment of thermal energy is applied to the rewrite recording layer in the image forming state, in addition to the action of the amino group of the color-reducing agent, the color erasing aid also acts, depriving the leuco compound of hydrogen ions, Return to the developer. Thereby, the decoloring property can be remarkably improved.

[0017] There are currently two types of leucolite recording layers: a black coloring type and a blue coloring type.
The present invention is effective for both types, but the blue color type is particularly effective.

[0018]

As described above, the present invention has the following effects. That is, the leuco lite card of the present invention is effective not only for prevention of falsification of rewriting by a writing instrument and the like, but also for falsification such as scraping of recorded contents, the print pattern layer on the rewrite recording layer is also scraped at the same time. Therefore, it is possible to easily confirm the determination of the presence or absence of tampering. As described above, the present invention has an excellent effect of preventing tampering of rewriting and scraping.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a cross section of a rewritable card according to an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 10: colored part of leucolite light recording layer 11: protective layer 12: printed picture layer 13: intermediate layer 14: leucolite recording layer 15: base material 16: magnetic recording layer

Claims (2)

[Claims] 1. A magnetic recording layer (16) on one surface of a substrate (15) made of polyethylene terephthalate (PET) or the like.
And a leukorelite card (30) in which a leukorelite recording layer (14) having a coloring portion (10) on the other surface, an intermediate layer (13), and a printed picture layer (12) are sequentially laminated. The printed pattern layer on the leuco lylite recording layer is printed in the range of 10 to 100% of halftone dots. 2. The leuco lite card according to claim 1, wherein a protective layer is provided on the printed picture layer of the leuco lite card.