JPH1199777A - Marking method of discrimination mark to card - Google Patents

Abstract

PROBLEM TO BE SOLVED: To spread fingerprints as ultimate means to cards and the like by putting fingerprints on the card directly, and thereafter exposing the part in a cyanoacrylate vapor and/or vaporized dye atmosphere, and thereby forming the image of fingerprints. SOLUTION: The card or the like preferably employs a resin-made card of polyethyleneterephthalate(PET), polybuthyleneterephthalate(PBT), and so on; however, it is not limited to this. Fingerprints are put on a predetermined position of the card with no use of an ink pad, ink, or the like. In this instance, a plurality of fingerprints are controlled not being superimposed at the predetermined position. Concretely, a card prepared in advance is covered with a protection film or the like so as to avoid fingerprints from being adhered thereon, and in the instance of adhering desired fingerprints, the protection film is removed therefrom. In another way, fingerprints can be adhered after cleaning the predetermined position by an interfacial active agent. As such, fingerprints are colored by allowing the fingerprints-affixed card to be exposed in the vapor atmosphere of a syanoacrylate or color element material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming an identification code useful for preventing unauthorized use of cards.

[0002]

2. Description of the Related Art Damage caused by unauthorized use of forged, altered cards, stolen or dropped cards is increasing rapidly. As a measure to prevent such unauthorized use, confirmation of the user's signature or PIN is used, but it is easy to imitate the signature and it is troublesome to forget the PIN when it is forgotten. There is.

[0003] Fingerprints have recently been used as the ultimate personal identification code. However, when registering a fingerprint or attaching a fingerprint on a card, an inlay or black ink is used. In addition to the problem that the image cannot be wiped off and causes discomfort, the image tends to be inaccurate or unclear due to bleeding or fatness. Alternatively, a method of imaging a fingerprint, printing a photograph or thermal transfer printing, and affixing this to a card has been adopted, but counterfeiting by replacing the photograph or printed matter poses a problem.

[0004]

In order to spread fingerprints as the ultimate personal identification means, it is necessary to eliminate the above-mentioned discomfort caused by registering or forming fingerprints and to make it impossible to replace them. is necessary.

[0005]

According to the method of the present invention, after a fingerprint is directly attached to cards without using an intermediary such as a stamp, the portion is subjected to cyanoacrylate vapor and / or a vaporized dye atmosphere. It is characterized in that a fingerprint image is formed by exposing it inside. In the present invention, since no medium such as a stamp is used, there is no discomfort as described above, a clear image can be formed with a character, and since a fingerprint image is formed directly on the card surface, replacement is impossible. is there.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
The cards used in the present invention are polyethylene terephthalate (PET), polybutylene terephthalate (PBT)
Polyester such as polyester, polyvinyl chloride (PVC), polyolefin such as polyethylene and polypropylene, and resin cards such as polycarbonate are preferable, and PET and PVC are particularly preferable, but not limited thereto.

According to the present invention, first, a fingerprint is attached to a predetermined portion of a card without using a stamp, black ink or the like. At this time, a plurality of fingerprints are prevented from overlapping a predetermined location.
Specifically, the card prepared in advance is coated at a predetermined place with a protective film or the like so that fingerprints do not adhere,
When attaching a desired fingerprint, the protective film is peeled off. Alternatively, a fingerprint can be attached after cleaning a predetermined portion with a surfactant.

Next, the fingerprint-attached card is exposed to a vapor atmosphere of a cyanoacrylate and / or dye material to color the fingerprint. Although the principle of the method used in the present invention is not clear, when using cyanoacrylate, water or a fatty acid present in a fingerprint portion serves as a polymerization initiator, and cyanoacrylate is polymerized from the portion to form a white resinous material. It is considered to be.

When the card is dark, the resin is white, so that the card can be visually recognized as it is, and the image can be converted into an image suitable for computer processing. If the card is white or light-colored, a colored fingerprint image can be formed by exposing the fingerprint attachment site to cyanoacrylate vapor and a vaporized colored dye simultaneously or later, and the same handling as before is possible. Becomes

When an invisible coloring material such as a fluorescent whitening agent or an ultraviolet absorbing agent is used in place of the above-mentioned colored dye, the fingerprint image is not visible to the human eye but is irradiated with ultraviolet rays, so that a fingerprint image is formed. It can be visually recognized as a fluorescent image or a dark image, and can be processed by a computer. in this case,
Since the fingerprint image is invisible, security is improved, which is preferable.

Although the mechanism of the coloring of the present invention is not clear, the dye is incorporated into the polymer by polymerization in the presence of the vapor of the cyanoacrylate monomer and the vapor of the dye, or the dye vapor is added to the polymer. Are considered to be dyed upon contact. Further, when cyanoacrylate is not used, it is considered that the vaporized dye comes into contact with secretions from fingers such as sebum and is dyed.

Examples of the cyanoacrylate used in the present invention include alkyl esters of α-cyanoacrylic acid such as methyl α-cyanoacrylate and derivatives thereof. Since the dye used in the present invention is required to have a high vapor pressure and good thermal stability, a nonionic disperse dye is preferable. Specifically, the color index No. In C
I Disperse Yellow-7, 42, 6
4, 71, Orange-13, Red-4, 50, 1
46, 364, Violet-28, Blue-56 and the like, and anthraquinone-based disperse dyes such as aminoanthraquinone, diaminoanthraquinone, dihydroxyanthraquinone and diaminodihydroxyanthraquinone.

Dyes used in dye-sublimation thermal transfer printers, which have recently begun to spread rapidly, are also preferably used as fluorescent brighteners. Shin-Dye Chemistry (Toyo Hosoda, published by Gihodo) 295-301 Oxazole Compound Uvitex ER, Coumarin Compound B
lankophor ACF and naphthalimide-based compounds.

[0014] As the ultraviolet absorber, there is a publication 65 of the Society of Color Materials.
Benzotriazole-based compound, benzophenone-based compound, cyanoacrylate-based compound or salicylic acid-based compound described in Vol. 5, No. 298-307 (1992). As a method of exposing to the vapor atmosphere of the cyanoacrylate and / or coloring material, a heater such as the card and the hot plate is placed in a closed box, and the cyanoacrylate and / or coloring material is heated by the heater. Can be exemplified. The temperature of the hot plate at this time is usually 100 to 20.
0 ° C.

When these dyes are heated and vaporized, the dye powder may be brought into direct contact with the heater or may be vaporized. However, the dye is dissolved in phthalic acid diester, phosphoric acid ester or the like. And the dye vapor are stably supplied, which is preferable for forming a colored image. Since the anion polymerization of cyanoacrylate is promoted by moisture, the humidity in the box of the cyanoacrylate vapor atmosphere is preferably 80% or less, more preferably 60% or less.

The fingerprint image formed as described above has excellent adhesiveness as it is, but it is preferable to cover the surface with a transparent protective member because of contamination resistance and the like. Specifically, a method of laminating the entire surface of the card with a fluorine-containing film or the like, a method of covering only the fingerprint attachment site with a transparent protective film, a card made of a transparent film, and putting the card in a bag slightly larger than the card, For example, a method in which a film outside the periphery of the card is heat-sealed and sealed, and the like can be exemplified. Hereinafter, the process of visualizing a fingerprint image in a vapor atmosphere of a cyanoacrylate and / or a dye member will be described specifically with reference to experimental examples.

EXPERIMENTAL EXAMPLE 1 A black polyethylene terephthalate card having fingerprints attached thereto and a hot plate were placed in a sealed box, and 0.1 g of a cyanoacrylate-based adhesive (trade name: Aron Alpha) was placed on the hot plate. And vaporized. After holding for 15 minutes, the card was taken out, and a white fingerprint attached to a predetermined portion of the card could be visually recognized.

Experimental Example 2 A milky white polyethylene terephthalate card with fingerprints attached thereto and a hot plate were placed in a sealed box, and 0.1% cyanoacrylate was placed on the hot plate.
g and CI Disperse Red 4 0.05
g was vaporized at the same time. After holding for 20 minutes as it was, the card was taken out, and a red fingerprint attached to a predetermined portion of the card could be visually recognized.

Experimental Example 3 A milky white polyethylene terephthalate card with fingerprints and a hot plate were placed in a closed box, and 0.1 g of 1,4-dihydroxyanthraquinone was put on the hot plate and vaporized. 20 as it is
After holding for a minute, the card was taken out, and an orange fingerprint attached to a predetermined portion of the card could be visually recognized.

Experimental Example 4 In Experimental Example 2, CI Disperse Red was used.
The same treatment was carried out except that Uvitex ER (optical brightener, product name of Ciba Specialty Chemicals) was used in place of 4. The fingerprint at a predetermined portion of the card was not visible to the naked eye, but when irradiated with an ultraviolet lamp, a blue fluorescent fingerprint was visible.

Experimental Example 5 In Experimental Example 4, Uvitex ER (same as above)
Were treated in the same manner except that 2,4 dihydroxybenzophenone was used instead of The fingerprint on the film was not visible to the naked eye, but upon irradiation with an ultraviolet lamp, the fingerprint was visible as a dark latent image.

[0022]

According to the present invention, since a fingerprint directly attached to a card is used as an identification code for cards, forgery, falsification and the like can be prevented.

Claims (3)

[Claims] 1. A card, wherein a fingerprint image is formed by directly attaching a fingerprint to a card or the like and exposing said portion to an atmosphere of cyanoacrylate vapor and / or a vaporized visible or invisible dye material. How to attach an identification code to 2. The method according to claim 1, wherein the card is made of a polyester resin or a polyvinyl chloride resin. 3. The method according to claim 1, wherein after the fingerprint image is formed, the surface on which the fingerprint image is formed is further covered with a transparent protective member.