JPH08300859A - Information recording medium and hologram transfer foil - Google Patents

Abstract

PURPOSE: To provide an information recording medium and a hologram transfer foil having low-cost productivity, excellent processability, randomness of a pattern to be intrinsic information, securability for forgery, falsification or alteration and being hard to be externally discovered for the presence with less influence to its reading accuracy. CONSTITUTION: A magnetic data layer 3 formed of magnetic particles and non-magnetic particles each having larger mean particle size than a magnetic particle size at least at one surface side and representing magnetic intrinsic information, a reflective thin film layer 4, a hologram forming layer 5 having a hologram image and a protective layer 6 are sequentially laminated on a base material 2. ID data intrinsic for medium of magnetic material and its reading can be easily given and facilitated. The layer 3 is concealed by the layer 4 for improving the visibility of the hologram and the effect as a display having a sense of stereoscopic beauty of the hologram image can be expected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to counterfeiting of information recording media such as credit cards, cash cards and ID cards.
The present invention relates to tampering / tampering prevention technology, and more specifically to security magnetic data to these information recording media, and more particularly to an information recording medium and a hologram transfer foil that make it easy and difficult to forge security magnetic data.

[0002]

2. Description of the Related Art In recent years, cards have been widely used as information recording media, and generally credit cards, cash cards, ID cards and the like. These cards have an information recording section including a magnetic recording layer, an optical recording layer or an IC recording section, and various information is recorded according to the application. For example, there is ID information of the card, information about the holder of the information recording medium, or information about money. When using this card, is the above card valid?
In addition, it is necessary to distinguish and confirm whether the user is legitimate (the owner of the legitimate information recording medium). The latter cardholder's legitimacy is confirmed by collating the personal identification number and signature field (signature written on the signature panel).

Particularly, in the former means for confirming the authenticity of the card, since the recorded information can be easily read and written on the card, the contents of the recorded information may be illegally altered artificially. . Therefore, as a measure to prevent these cards from being fraudulent, it is necessary to prevent the use of commonly available reader / writers by using high-coercive force magnetic recording or magnetic shield that enables reading / writing with a special magnetic head in magnetic recording. Moreover, a means for optically distinguishing an authentic object has been implemented by forming a hologram (a hologram having information such as a pattern or a bar code) or using a special ink such as infrared absorption or infrared reflection or fluorescence coloring. It was However, the effect of these conventional security measures is weak at present. In particular, when the security information for determining authenticity is used for all cards issued in one way, there is a possibility that the security information may be decrypted or imitated, and there is a high possibility of forgery, falsification, and alteration. for that reason,
There is a need for a means of deciphering the information recorded on a card and reliably preventing fraudulent or re-entering information on a legitimate card.

As a means for preventing fraudulent acts such as forgery, alteration, tampering, etc. of this card, and its fraudulent use, for example, stainless fibers are randomly distributed in a check document disclosed in Japanese Patent Publication No. 63-501250. There is a technique of distributing and checking this with a microwave. In this method, microwaves are incident on fine stainless fibers randomly distributed in a document, and a digital mark whose response microwave flux is determined by a certain rule is recorded on the document. When judging the authenticity of a document, a microwave is incident on the document, and the digital mark determined according to the response microwave flux is compared and collated with the above-mentioned digital mark. To judge.

However, in the above technique, the processing technique for dispersing the conductive metal fiber in the information recording medium is difficult, so that the cost is high. Further, the microwave of the gigahertz band used for reading this information recording medium is difficult to control and has a large reading error. Specifically, microwaves are transmitted or reflected in a random pattern of stainless fibers to obtain data unique to the pattern, and this data is approximated to a correlation coefficient to determine identity. In this case, it is extremely difficult to set the correlation coefficient in order to enable highly accurate judgment, and it is not practical. Further, there is a drawback that the microwave reading device itself becomes large and complicated.

On the other hand, there is an idea to make a random pattern of a magnetic material to realize the same thing as the microwave. There are the following three typical methods for producing this magnetic random pattern. First of all
There is a method of dispersing these by using a magnetic metal fiber. As a second method, there is a method of filling a polymer material with a magnetic material instead of the magnetic metal fiber in the first method and dispersing the polymer material as a polymer magnetic fiber. As a third method, there is a method of providing an irregular magnetic ink pattern by a method such as printing, transfer, printing (inkjet, electrostatic printing). A fourth method is a method in which magnetic particles and non-magnetic particles having an average particle size larger than the magnetic particles are dispersed.

However, the first to third methods have the following problems. In the case of the first method, in addition to the high cost of the magnetic metal fiber, there is also a problem in workability. When cutting the metal fiber, the teeth of the cutter are damaged, and when processed into a medium, burrs and Mustache may occur. In the case of the second method, it is possible to handle only large lots from the production of polymer magnetic fibers to dispersion, and the small lots are not suitable for high cost as in the first method. In the case of the third method, the cost is relatively low, but the magnetic pattern rises, and the pattern may be easily discriminated from the outside. In addition, since it is an artificial magnetic pattern, it is highly possible that the same pattern will be formed, and there is a surface lacking randomness.

[0008]

However, if a random pattern is provided on the information recording medium by the first to fourth methods, its existence can be easily identified from the state of color, shape, etc., which is preferable for security. However, in some cases, the magnetic fibers or the protrusions of the magnetic material of the first and second methods may damage the reading magnetic head or the pattern itself may be worn, resulting in alteration of data.
Further, the pattern overlaps with the design of the information recording medium such as a picture or a pattern, so that there is an effect that the appearance is deteriorated.

Therefore, the present invention has been made in view of the above circumstances, can be manufactured at low cost, has good processability, randomness of a pattern serving as unique information, and security against forgery / alteration / alteration. It is an object of the present invention to provide an information recording medium and a hologram transfer foil, the existence of which is hard to be detected from the outside and the reading accuracy of which is little affected.

[0010]

The information recording medium according to the first aspect of the present invention comprises magnetic particles on at least one surface side of a substrate and non-magnetic particles having an average particle size larger than the magnetic particles. A magnetic data layer representing magnetic unique information, a reflective thin film layer, a hologram forming layer having a hologram image, and a protective layer, which are sequentially laminated.

The information recording medium according to the second aspect of the present invention is a magnetic characteristic formed by magnetic particles on at least one surface side of a base material and non-magnetic particles having an average particle size larger than the magnetic particles. A magnetic data layer representing information, a reflective thin film layer, a hologram forming layer having a hologram image, and a protective layer are sequentially laminated, and at least a part of the base material is provided with digital information holding the magnetic unique information. It is characterized by

In the second aspect of the present invention, it is possible that at least a part of the information recording medium is provided with a magnetic recording section and the magnetic recording section is recorded with digital information representing magnetic unique information. is there.

The hologram transfer foil of the present invention has at least a peelable protective layer on one side of a support, a hologram forming layer having a hologram image, a reflective thin film layer, magnetic particles and an average particle size larger than the magnetic particles. It is characterized in that a magnetic data layer representing magnetic unique information formed by non-magnetic particles having a and an adhesive layer are sequentially laminated.

[0014]

The magnetic data layer of the information recording medium according to the present invention can be formed, for example, by using a magnetic ink containing magnetic particles, non-magnetic particles having an average particle size larger than the magnetic particles, and a binder. The magnetic particles having a small particle size are relatively uniformly dispersed in the magnetic ink, whereas the non-magnetic particles having a large particle size are non-uniformly dispersed in the magnetic ink. Here, the non-magnetic particles having a large particle size mean the non-magnetic particles alone or an aggregate thereof. Therefore, due to the influence of non-magnetic particles dispersed non-uniformly, magnetic unevenness occurs in the layer obtained by applying the magnetic ink, and this magnetic unevenness becomes the analog magnetic unique information of the information recording medium of the present invention. .
The existence of the magnetic data layer is hidden from the outside by the reflective thin film layer that improves the visibility of the hologram image on the hologram forming layer.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of the information recording medium of the present invention.
3 is a cross-sectional view of the information recording medium taken along line XX of FIG. 1, FIG. 3 is a schematic diagram showing a read signal waveform in the magnetic data layer of the information recording medium of FIG. 1, and FIG. 4 is a hologram transfer of the present invention. 5 is a cross-sectional view of a foil, FIG. 5 is a plan view of an information recording medium having a hologram transfer foil of the present invention transferred and formed on a substrate, and FIG. 6 is a read signal in a magnetic data layer of the information recording medium of FIG. It is a schematic diagram which shows a waveform. Figure 7
FIG. 8 is a diagram showing an example in which the magnetic recording portion of the information recording medium of the present invention is tampered with and a magnetic recording portion of the card of the present invention is dead copied to another information recording medium. FIG. 8 is an information recording medium of the present invention. FIG. 9 is a diagram showing a state when it is determined to be true by the truth determination, and FIG. 9 is a diagram showing a state when the information recording medium of the present invention is determined to be false by the truth determination.

First, in the information recording medium 1 of the present invention shown in FIG. 1, a magnetic data layer 3 representing magnetic unique information is formed on a substrate 2 as shown in the sectional view of FIG. The hologram forming layer 5 having a hologram image and the protective layer 6 are sequentially laminated to form the authenticity determining means 8. Further, a magnetic recording portion 7 for recording magnetic information is formed at another position on the base material 2. The magnetic recording portion 7 is processed so as to be flush with the substrate 2, and if necessary, a pattern layer 9 such as a pattern, a pattern or a letter is formed on both sides of the substrate 3 as a card design. It

Further, the same numbers are used for the portions having the same structure in each drawing of the embodiment. The information recording medium is
A sign panel (not shown) or the like may be provided on the surface depending on the application.

The respective constituents will be further described.
In addition, synthetic resins such as polyvinyl chloride, polyester, polycarbonate, polymethylmethacrylate, polystyrene and polyethylene terephthalate, natural resin, paper, synthetic paper, metal, ceramics and the like can be used alone or in combination. The material can be appropriately selected from the above-mentioned materials in consideration of the physical properties required according to the use, such as strength, rigidity, hiding power and light opacity.
The base material 2 may be a laminated body (not shown) in which a core sheet and oversheets are laminated on both sides of the core sheet.

The magnetic data layer 3 is composed of at least magnetic particles (not shown) and non-magnetic particles (not shown) having an average particle size larger than the magnetic particles. For example, as a magnetic ink, acrylic resin, polyester resin, urethane is used. Binder (polymer binder) made of thermoplastic resin or thermosetting resin such as resin, vinyl chloride resin, polyamide resin, polyvinyl acetate resin, vinyl chloride-vinyl acetate copolymer resin, rubber resin, epoxy resin, cellulose resin, etc. It is formed in a binder) or in a state where these are further dispersed in a solvent. That is, the magnetic particles having a small particle size are relatively uniformly dispersed in the magnetic ink, whereas the non-magnetic particles having a large particle size are non-uniformly dispersed in the magnetic ink, so that the non-uniformly dispersed non-magnetic particles are dispersed. Due to the influence of the magnetic particles, magnetic unevenness occurs in the layer coated with the magnetic ink. This unevenness becomes the analog magnetic unique information of the card with the sign panel of the present invention. The large non-magnetic particles mean non-magnetic particles alone and aggregates thereof.

The magnetic data layer 3 having the analog magnetic unique information can be easily and randomly formed by ordinary full surface coating or solid printing without intentionally forming a magnetic pattern as in the printing method. .

The magnetic unevenness of the information recording medium of the present invention is preferably about 10 to 50 μm. Since the resolution of the magnetic sensor for reading such analog magnetic unique information is generally about 20 μm or more, the magnetic unevenness is
More preferably, if it is 20 μm or more, it is easy to read as magnetic unique information (security magnetic data).

In order to produce such magnetic unevenness of 20 μm or more, it is preferable that the magnetic particles used have an average particle size of 10 μm or less, and the non-magnetic particles have a particle size of 2 μm or more. . If the magnetic particles exceed 10 μm,
Uniform dispersion tends to be difficult, and non-magnetic particles are 2μ
If it is less than m, it tends to be difficult to form magnetic unevenness of 20 μm or more. More preferably, the magnetic particles have an average particle diameter of 0.5 to 10 μm, and the non-magnetic particles have an average particle diameter of 2 to 40 μm. The average particle size of magnetic particles is
If the particle size is less than 0.5 μm, the particles tend to agglomerate and are difficult to disperse uniformly, the suitability for printing coating is poor, and the physical properties of the magnetic coating film tend to be poor.
If it exceeds μm, it tends to be protrusions when formed into a coating film, and there is a tendency that the substrate suitability as a medium such as laminating property, running property, and slip property is deteriorated.

Further, the non-magnetic particles have a ratio of 1 to the magnetic particles.
It is preferably 0 μm or more. If it is 10 μm or more, there is an advantage that it is easy to create magnetic unevenness that can be read by a sensor. However, if it is less than 10 μm, the uniformity of magnetic particles tends to be poor, and magnetic unevenness tends to be difficult to form.

When a scale-like material is used as the non-magnetic material, it can be sufficiently utilized even if the average particle diameter is 40 μm or more, but its thickness is the thickness of the coating layer (magnetic data layer). It is preferable not to exceed the thickness.

The shape of the non-magnetic powder may be scale-like (flake-like), needle-like, spherical, amorphous or boat-like, and the shape is not particularly limited. In particular, a scale-like material having a small thickness and a large shape is convenient because the thickness of the magnetic data layer can be reduced, and thus it can be preferably used.

As a method of non-uniformly dispersing the non-magnetic material, non-magnetic powder having a large particle size distribution is used (for example, in the range of 0.5 to 10 μm), and the average particle diameter is 10 μ.
In the case of a non-magnetic powder having a particle size distribution of m or less and a small particle size distribution, the dispersion is intentionally softened without dispersing the primary particles to leave an aggregate of 10 μm or more, and a large non-magnetic particle of 10 μm or more is used. Etc. are possible.

The magnetic material is barium ferrite,
Any of a metal oxide substance such as γ-ferrite, a crystalline single metal such as nickel and carbonyl iron, a crystalline alloy such as a nickel iron alloy, and an amorphous alloy such as an iron nickel cobalt amorphous alloy may be used. The material of the non-magnetic material is Al
Any particles such as oxides such as ₂ O ₃ and SiO ₂ , metal salts such as magnesium silicate, metal soaps such as zinc stearate, mica carbon, organic substances such as acrylic polymers can be used in the present invention. Is possible.

The coercive force of magnetic materials is generally soft (60 Oe or less) and semi-hard (60 to 200 Oe).
e) and hard materials (200 Oe or more), any magnetic material having a coercive force can be used in the present invention.

In particular, the magnetic particles have a coercive force of 60 Oe or less, and it is difficult to detect the magnetic pattern. In addition, since there is no need for magnetization, there is an advantage that recognition is possible with a low bias magnetic field.

On the other hand, when the magnetic particles have a coercive force exceeding 60 Oe, the magnetic data layer 3 using the magnetic particles can further record digital magnetic information.
Therefore, the magnetic data layer 3 using the magnetic particles having a coercive force of more than 60 Oe can be used as a magnetic data layer and a digital information data recording section which can also record digital information representing magnetic unique information. There is an advantage that you can.

Furthermore, when two or more kinds of magnetic powders having different coercive forces are mixed, information can be recognized for each magnetic body by a predetermined bias magnetic field, so that at least two kinds of information are held, which is extremely high. There is an advantage that security can be improved.

The filling amount of the non-magnetic material may be arbitrary and may be high filling or low filling as long as the magnetic material can be made uneven.
However, it is not preferable to uniformly disperse the non-magnetic material of very fine particles with high filling, because it is difficult to make unevenness of the non-magnetic material.

The hologram forming layer 5 is, for example, a surface relief hologram having a fine relief pattern as the hologram image H, and the reflective thin film layer 4 is formed thereunder.
Is provided.

The hologram forming layer 5 has a good embossing moldability, is less likely to cause uneven press, produces a bright reproduced image, and has good adhesiveness with the reflective thin film layer 4 and the protective layer 6. And a two-component reactive urethane resin, for example, a polyol component such as polyether polyol, polyester polyol, acrylic polyol, and toluene diisocyanate (TDI), xylene diisocyanate (XDI),
A polyol-curable urethane resin composed of a prepolymer having an isocyanate group, which is obtained from an isocyanate component such as hexamethylene diisocyanate (HMDI), is suitable. Preferred is an acrylic polyol resin in which the glass transition point of the polyol component is in the range of 70 to 150 ° C. and the OH group thereof is 50 to 150. This acrylic polyol resin has good coating suitability and extremely good embossing moldability required for hologram molding.

Examples of other resins include thermoplastic resins such as vinyl chloride-vinyl acetate copolymer, urethane resin, polycarbonate resin, polystyrene resin, polyvinyl chloride resin, unsaturated polyester resin, melamine resin, epoxy resin, urethane. Thermosetting resins such as (meth) acrylate, polyester (meth) acrylate, epoxy (meth) acrylate, polyol (meth) acrylate, melamine (meth) acrylate, triazine (meth) acrylate, and mixtures thereof, and further radical-polymerizable Thermoformable materials having unsaturated groups can be used, and resins other than the above can be used as long as they are stable enough to form holograms.

As a modifier for improving coating suitability and transferability, a cellulose resin such as nitrocellulose, acetylcellulose, cellulose acetate butyrate, cellulose acetate propionate, ethyl cellulose or methyl cellulose may be added. Such an adjusting agent is used as an example of a two-component reactive urethane resin, and a maximum of 3
It can be added in an amount of 0% by weight, preferably 5 to 20% by weight.

In order to form such a hologram forming layer 5, a known resin coating method such as roll coating or blade coating is applied to the peelable protective layer 13 of the hologram transfer foil 11 shown in FIG. It can be formed by coating and drying on, and its film thickness is about 0.5 to 10 μm.

The hologram forming layer 5 thus formed is the support film 1 on which the peelable protective layer 13 is formed.
2 has a proper adhesiveness, and has excellent moldability by heating and pressurizing during embossing, and nickel on the surface.
A reflective thin film layer 4 which does not show adhesion to a surface relief type hologram stamper plated with gold, chrome, etc.
In addition, the adhesiveness is good, and the film cutting property required at the time of transfer to the substrate is also good. In this hologram forming layer 5, a hologram image is embossed by heating and pressing a nickel plate having a relief surface having fine irregularities on the hologram forming surface at 150 ° C.-10 kg / cm ² .

In addition, a well-known two-bundle interferometry method, a grating hologram in which fine unevenness of a hologram image is formed by a diffraction grating (grating) by an electron beam (EB), or a hologram such as a Lippmann hologram can be used. However, the present invention is not limited to these and can be variously used according to the application. It should be noted that setting the material of the hologram forming layer according to the hologram to be configured can be appropriately and easily performed based on a known technique. Further, the transparent thin film layer 16 can be omitted.

The reflective thin film layer 4 reflects incident light to improve the visibility of the hologram image and conceals the magnetic data layer 3. For example, an aluminum vapor deposition film having a thickness of 50 nm is formed by a vacuum vapor deposition method. Has been done. The thin film forming the reflective thin film layer 4 includes Sn, A
An inorganic material having a metallic luster such as g, Au, Cr, Ni, brass, and Cu-Al can be formed by a vacuum deposition method, a sputtering method, an ion plating method, or the like, and the layer thickness is in the range of 40 to 100 nm. Is preferred.

It is also possible to use a transmissive thin film layer instead of the reflective thin film layer 4, and a hologram forming layer (refractive index n = 1.3 to
A material having a higher refractive index than 1.5) and a high transmittance in the visible light region is used. When the transparent thin film layer having a high refractive index is provided along the relief pattern surface of the hologram forming layer, the transparent thin film layer is within the reproducible angle range of the hologram image H due to the reproduction angle dependence of the hologram. The reflectance of light in the area becomes maximum and functions as a “reflection hologram”, while it functions only as a transparent body outside the reproducible angle range of the hologram image H, and allows the lower layer to be seen through. In this case, the magnetic data layer 3 is hidden by a hiding layer (not shown),
Further, a print layer (not shown) composed of visible information such as characters, patterns and designs may be provided on the concealing layer so that the transparent thin film layer can be seen and the print layer can be viewed. In this case, since the magnetic data layer 3 is hidden by the hiding layer, it cannot be visually recognized from the outside. Examples of the material forming such a transparent thin film layer include the inorganic materials shown in Table 1.

[0042]

[Table 1]

As a method for forming the transparent thin film layer, a known film forming means such as a vacuum vapor deposition method, a sputtering method and an ion plating method can be used, and the film thickness thereof is in the range of 10 to 1000 nm. Appropriate.

The protective layer 6 is provided to protect the magnetic data layer 3, the reflective thin film layer 4 and the hologram forming layer 5 from chemical damage or mechanical damage due to permeation of chemicals and solvents from the outside. The material is a mixture of resin and an anti-friction agent. The above-mentioned resins prevent penetration of chemicals such as plasticizers, acids, alkalis, alcohols, and kerosene, and also suppress the occurrence of scratches due to scratches.
For example, polyester resin, urethane resin, vinyl chloride resin, polyamide resin, polyvinyl acetate resin, silicone resin, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-acrylic acid ester copolymer, etc. Further, there are polymethylmethacrylate, epoxy resin, acrylic resin, chlorinated rubber resin, vinyl chloride-vinyl acetate copolymer resin, cellulose resin, chlorinated polypropylene resin and the like.

The above anti-friction agents improve abrasion resistance and scratch resistance, and include, for example, Teflon powder; polyethylene powder; animal wax, plant wax, mineral wax, petroleum wax and other natural waxes. Synthetic hydrocarbon wax, fatty alcohol and acid wax, fatty acid ester and glycerite wax, hydrogenated wax, synthetic ketone wax, amine and amide wax, chlorinated hydrocarbon wax, synthetic animal wax wax, Synthetic waxes such as α-olein wax; metal salts of higher fatty acids such as zinc stearate.

The compounding ratio of the above resin and anti-friction agent is 1
The range of 85 to 95 parts by weight of the resin and 5 to 15 parts by weight of the anti-friction agent is preferable with respect to 00 parts by weight.

Each of the layers configured as described above is formed on the substrate 2 after being processed into another functional medium such as a transfer foil or a seal, or is directly coated on the substrate by using a magnetic ink or Any method of printing may be used, and it is possible to provide a printer that is relatively inexpensive, has excellent workability, is difficult to recognize magnetic unevenness easily, and has excellent randomness.

Further, the magnetic recording section 7 can record data used for usual applications such as a card, in addition to recording the magnetic unique information read from the magnetic data layer 3 as described above. The magnetic recording portion 7 is made of a known material, for example, γ-Fe ₂ O ₃ , Co-deposited γ-Fe.
₂ O ₃ , Ba-ferrite Sr-ferrite, etc. are dispersed in a binder to apply a magnetic ink, or a magnetic transfer tape formed by applying this magnetic ink is used for thermal transfer formation.

Next, the operation of the information storage medium will be described. In the information storage medium having the above structure, the reflective thin film layer is formed between the hologram forming layer 5 and the magnetic data layer 3, so that the visibility of the hologram forming layer 5 is improved,
The magnetic data layer 3 is made invisible.

As a method of reading the magnetic data layer 3, a known magnetic sensor (magnetic head, magnetoresistive sensor, etc., preferably a magnetoresistive effect [magneto-re] is used.
In the case of a hard material (coercive force of 200 Oe or more), the unevenness of the residual magnetization of the magnetic material is read or
With a semi-hard material (coercive force of 60 to 200 Oe) or less, by reading the unevenness of the magnetic flux while applying an external bias magnetic field, it is possible to obtain information specific to the medium as a read output as shown in FIG. . The analog information peculiar to the medium obtained in this way is, for example, A
By D conversion, digital information is converted into digital information and a digital information recording method of the medium [magnetic recording (magnetic recording portion 7 in FIG. 1), magnetic bar code, optical bar code, OCR, MICR, I
C memory, optical memory or the like (not shown)], both are read when the medium is used, and the authenticity is determined by their correlation coefficient or the like. In the case where the magnetic unique information of the magnetic data layer 3 is not held in the information recording medium 1, the read magnetic unique information is recorded and held by an external information recording means, and the magnetic unique information is read at the time of collation. ,
Further, the authenticity can be determined by collating with the magnetic unique information read from the magnetic data layer 3.

The above-mentioned information recording medium 1 has a structure in which a magnetic data layer 3 and a magnetic recording portion 7 for recording digital information composed of a magnetic stripe are formed on a base material 2. The magnetic data layer 4 has unique magnetic information due to non-uniform magnetic material distribution as information that cannot be visually identified. The output waveform of the magnetic data layer 3 is read by a magnetic sensor such as a magnetic head, the unique magnetic information is recognized, AD conversion is performed, and digital information is recorded in the magnetic recording unit 5. Although the magnetic stripe is used here, for other digital recording, for example, barcode, OCR, MICR, digital information recording by IC memory or optical memory can be used.

During the transaction of the above information recording medium 1,
The authenticity of the information recording medium is determined by reading the output waveform of the magnetic data layer 3 having a non-uniform magnetic material distribution, and comparing it with the encoded information digitally recorded in the magnetic recording unit 7 and collating it. For example, FIG. 7 shows an example in which the information recording medium with the sign panel of FIG. 1 is tampered with. When the magnetic recording unit 7 of (a) is tampered with, the tampered information of the magnetic recording unit 7 ′ and the information of the magnetic data layer 3 are not collated and the transaction is stopped. (B) When the information in the magnetic recording unit 3 is dead-copied to another information recording medium, the dead-copied information in the magnetic recording unit 7 ″ and the unique data corresponding to the magnetic data layer 3 ′ of the other information recording medium are used. The information is not collated and the transaction is suspended.

As described above, in the authenticity judgment of the information recording medium of the present invention, since the information recording medium used has the security magnetic data peculiar to the medium which is difficult to be copied, it is hard to be tampered with and the data on the magnetic stripe or Even if the visually recognizable optical bar code or the data in the IC memory or the optical memory is falsified, if it is collated with the magnetic unique information existing on the base material of the information recording medium, the information recording medium is easily an untrue information recording medium. Can be found in

Next, the hologram transfer foil 11 of the present invention shown in FIG. 4 will be described. With this hologram transfer foil 11, the magnetic data layer 3, the reflective thin film layer 4, the hologram forming layer 5, and the protective layer 6 of the information recording medium can be formed. In addition,
The same parts as those of the above information recording medium are designated by the same reference numerals, detailed description thereof will be omitted, and only different parts will be described.

The hologram transfer foil 11 of the present invention shown in FIG.
Is a support film 12, a peelable protective layer 13 which is provided on the support film 12 in a peelable manner, a hologram forming layer 5 having a hologram image, a reflective thin film layer 4, a magnetic data layer 3, and a heat-sensitive adhesive layer 14 in this order. It has a laminated structure.
This hologram transfer foil 11 is arranged with a heat-sensitive adhesive layer 14 at a desired position on the base material 2, transferred by heating and pressing to the base material except the support film 12, and the support film 12 is peeled and removed. It Thereby, an information recording medium can be manufactured.

Explaining each constitution further, the support film 12 is a sheet having heat resistance without being softened and deformed by heating and pressurizing at the time of thermal transfer. For example, polyethylene terephthalate film, polyethylene naphthalate film, polyvinyl chloride. , Synthetic resins such as polyester, polycarbonate, polymethylmethacrylate and polystyrene, natural resins, paper, synthetic paper and the like, which can be used alone or in combination as a composite, and the thickness of the support film 12 is 2 to 50 μm,
It is preferably 10 to 38 μm.

The peelable protective layer 13, together with other layers, peels from the support film 12 when it is transferred onto the base material 2. Since it has peelability, it is exposed to the outside on the base material. , The underlying hologram forming layer is
It is necessary to have the function of protecting from chemical damage or mechanical damage due to the penetration of solvents, etc. In order to have both functions, a mixture of thermoplastic resin and anti-friction agent is used. .

The above-mentioned thermoplastic resin prevents penetration of plasticizers and chemicals such as acids, alkalis, alcohols and kerosene, and also suppresses scratches due to scratching. For example, there are polymethylmethacrylate, epoxy resin, thermoplastic acrylic resin, chlorinated rubber resin, vinyl chloride-vinyl acetate copolymer resin, cellulose resin, chlorinated polypropylene resin and the like. These polymethylmethacrylate and epoxy resins have excellent plasticizer resistance among existing thermoplastic resins and are substances that can be easily peeled from the support film 12.

The above-mentioned anti-friction agents improve abrasion resistance and scratch resistance, and include, for example, Teflon powder; polyethylene powder; animal wax, plant wax, mineral wax, petroleum wax and other natural waxes. Synthetic hydrocarbon wax, fatty alcohol and acid wax, fatty acid ester and glycerite wax, hydrogenated wax, synthetic ketone wax, amine and amide wax, chlorinated hydrocarbon wax, synthetic animal wax wax, Synthetic waxes such as α-olein wax; metal salts of higher fatty acids such as zinc stearate.

The mixing ratio of the thermoplastic resin to the anti-friction agent is 85 to 95 with respect to 100 parts by weight of the thermoplastic resin.
The range of 5 to 15 parts by weight of the anti-friction agent is preferable.
Further, the coating amount of the peelable protective layer 13 is preferably about 1 to 3 g / m ² .

The hologram forming layer 5, the reflective thin film layer 4, and the magnetic data layer 3 are the same as those described above for the information recording medium, and are omitted.

The heat-sensitive adhesive layer 14 has a property of adhering to the surface of the base material 2 by heating and pressing, and a composition made of a thermoplastic resin is made into a paint by a suitable solvent, and roll coating, blade coating, gravure coating is performed. And formed on the magnetic data layer 3 by a known coating method such as a coating method or a bar coating method.

As the thermoplastic resin used in the heat-sensitive adhesive layer 14, one having a glass transition point Tg of 50 to 130 ° C. is preferable in order to lower the temperature required for thermal transfer (adhesion), and a glass exceeding 130 ° C. A thermoplastic resin having a transition point Tg requires a high temperature for thermal transfer, and in particular, a heating temperature higher than the softening point of the thermoplastic resin is required in the transfer process, so that the base material (resin material) is not deformed or heat-sensitive during thermal transfer. This is because the adhesive layer 14 may be discolored or deteriorated.

[0064] Examples of the thermoplastic resins include polyesters such as linear saturated polyesters, polyvinyl chloride - vinyl chloride vinyl acetate copolymer resin-based resins, polyacrylic acid, polyacrylic acid-2-methoxyethyl, poly Methyl acrylate, 2-naphthyl polyacrylate, isobornyl polyacrylate, polymethacrylmethyl, ethyl polymethacrylate, -t-butyl polymethacrylate, isobutyl polymethacrylate, phenyl polymethacrylate, methyl methacrylate and alkyl methacrylate (however, acrylic resins such as copolymer resins of carbon atoms in the alkyl group is 2-6), polystyrene and polyvinyl benzene, styrene - butadiene copolymer resin, styrene-alkyl methacrylate (the number of carbon atoms of the alkyl group is 1 to 6 ) Copolymer resin It is nil resins.

The hologram transfer foil having the above-mentioned structure is arranged at a desired portion of the substrate 2 as shown in FIG. 5, and is heated and pressed (heating temperature: 100 to 250 ° C., heating and pressing time: preferably). Within 10 seconds, for example 130 ° C-300
The part excluding the support film 12 is transferred and formed on the substrate 2 by g / cm ² ). The transferred portion has the same function as that of the information recording medium 1 described above, and by reading the unevenness of the magnetic flux while applying the external bias magnetic field,
Information specific to the medium can be obtained as a read output as shown in FIG. Further, by reading and recording the unique magnetic information of the magnetic data layer 3 in advance in the magnetic recording portion 7 provided on the same base material 2, the output waveform of the magnetic data layer 3 is read at the time of the collation as described above, and the magnetic recording is performed. The authenticity of the information recording medium can be determined by comparing and collating with the encoded information recorded in the section 7. The shape, size, and position of the transferred and formed portion can be arbitrarily determined.

The information recording medium thus formed has security magnetic data peculiar to the medium which is difficult to be copied, and therefore is hard to be tampered with, and the data on the magnetic stripe, the visible optical bar code, the IC memory or the optical memory is tampered with. Even if the data therein is falsified, if it is collated with the magnetic unique information existing on the base material of the information recording medium, it can be easily found that the information recording medium is an untrue one.

Further, since it is in the form of a transfer foil, the authenticity judging means 8 including the magnetic data layer can be easily formed, and conventionally, the authenticity judging means 8 must be provided at the manufacturing stage in a card or the like. However, according to the hologram transfer foil of the present invention, the authenticity determination means 8 can be provided at the issuance stage of a credit card, an ID card, etc., and there is a constraint at the manufacturing stage of setting the provision time of the authenticity determination means. Can be eliminated. Further, since the transfer is performed, the manufacturing process can be simplified.

The magnetic data layer and the heat-sensitive adhesive layer can also be used by dispersing and mixing the magnetic particles and the non-magnetic particles forming the magnetic data layer in the thermoplastic resin forming the heat-sensitive adhesive layer 14. It is possible to obtain the same operational effect as.

Further specific examples of the present invention will be described below. <Embodiment 1> FIG. 2 is a sectional view of an information recording medium 1 according to a first embodiment of the present invention. The information recording medium 1 shown in FIG. 2 uses a card paper (made by Tomagawa Paper Mills) having a size of 5.4 × 8.6 cm and a layer thickness of about 0.2 mm as a base material 2, and the base material 2 has magnetic particles and magnetic particles. A magnetic data layer 3 representing magnetic unique information formed of non-magnetic particles having a larger average particle diameter is formed, and a magnetic recording portion 7 for recording magnetic unique information is provided on the base material 2.

The magnetic data layer 3 has a magnetic ink of the following composition formed on the substrate 2 by a roll coating method to have a layer thickness of 15:
The coating was formed to a thickness of μm. Magnetic ink composition Magnetic particles: Ni particles (Novamet HCA-1, manufactured by INCO, scale-shaped, thickness 1 μm, average particle size 5 μm, coercive force 50 Oe) 100 parts Non-magnetic particles: Al particles (scaled by Toyo Aluminum Co., Ltd. Shape, thickness 0.5 μm, average particle size 10 μm) 20 parts Acrylic / cellulose resin (VM-AL, manufactured by Dainichiseika Co., Ltd., solid content 30%) 40 parts Toluene (solvent) 60 parts

Next, in the hologram forming layer 5, a hologram forming layer varnish having the following composition was applied by a roll coating method to a layer thickness of 2 μm and dried, and fine irregularities of a hologram image were formed on the hologram forming surface. Heating and pressurizing the relief type hologram stamper (nickel plate) (15
A hologram image is embossed at 0 ° C.-10 kg / cm ² ). ○ Hologram forming layer varnish composition Mixture of vinyl chloride-vinyl acetate copolymer resin and urethane resin 25 parts Isocyanate curing agent (TDI) 3 parts Methyl ethyl ketone 65 parts Toluene 30 parts

Next, the reflective thin film layer 4 is the hologram forming layer 5
An aluminum layer having a layer thickness of 50 nm was formed on the upper surface by a vacuum evaporation method.

Next, the protective layer 6 is formed by applying a protective layer coating material having the following composition to a layer thickness of 3.0 μm by a gravure coating method. ○ Coating composition for protective layer Polyester resin (Vylon 200 manufactured by Toyobo Co., Ltd.) 30 parts Polyethylene wax 0.2 parts Toluene 40 parts Methyl ethyl ketone 30 parts

Further, the magnetic recording portion 7 has a coercive force of 2750O.
e magnetic particles of barium ferrite (BaO-6Fe ₂ O
₃ ) was dispersed in a vinyl chloride vinyl acetate copolymer / urethane-based binder and formed on the oversheet 3 by thermal transfer and flush treatment using a magnetic transfer tape formed by coating and forming on a base sheet. Further, the surface of the information recording medium is made flush with the information recording medium 1 by a hot press treatment (110 to 140 ° C., 50 to 100 kg / m ² ).
I got

Example 2 FIG. 4 is a sectional view of the hologram transfer foil 11 of the present invention. The hologram transfer foil 11 shown in FIG. 4 includes a support film 12 made of a polyethylene terephthalate (PET) film, a peelable protective layer 13,
A hologram forming layer 5, a reflective thin film layer 4, a magnetic data layer 3 representing magnetic unique information formed of magnetic particles and non-magnetic particles having an average particle size larger than the magnetic particles, and a heat-sensitive adhesive layer 14 are sequentially provided. There is.

A peelable protective layer composition having the following composition was applied to the support film 12 by a gravure coating method to give a layer thickness of 2
After being coated to a thickness of μm and dried, a peelable protective layer 13 was formed. ○ Releasable protective layer composition Acrylic resin 25 parts Carbana wax 5 parts Toluene 30 parts Methyl ethyl ketone 30 parts Methyl isobutyl ketone 15 parts

Next, in the hologram forming layer 5, a hologram forming layer varnish having the following composition was applied by a roll coating method to a layer thickness of 2 μm and dried, and fine irregularities of a hologram image were formed on the hologram forming surface. Heating and pressurizing the relief type hologram stamper (nickel plate) (15
A hologram image is embossed at 0 ° C.-10 kg / cm ² ). ○ Hologram forming layer varnish composition Mixture of vinyl chloride-vinyl acetate copolymer resin and urethane resin 25 parts Isocyanate curing agent (TDI) 3 parts Methyl ethyl ketone 65 parts Toluene 30 parts

Next, the reflective thin film layer 4 is the hologram forming layer 5
An aluminum layer having a layer thickness of 50 nm was formed on the upper surface by a vacuum evaporation method.

Next, the magnetic data layer 3 was formed by coating a magnetic ink having the following composition on the base material 2 by a roll coating method to a layer thickness of 10 μm. Magnetic ink composition Magnetic particles: Mn-Zn ferrite powder 100 parts (amorphous, average particle diameter 1.5 μm, coercive force 30 Oe) Non-magnetic particles: magnesium silicate (average particle diameter 20 μm) 40 parts Urethane resin 30 parts Methyl ethyl ketone 30 Part Toluene (solvent) 30 parts

Next, the heat-sensitive adhesive layer 14 was formed by applying a heat-sensitive adhesive varnish having the following composition on the magnetic data layer 3 by a roll coating method to a layer thickness of 2 μm. ○ Heat-sensitive adhesive varnish composition Polyester resin (manufactured by Toyobo Co., Ltd., Byron 200) 30 parts Vinyl chloride-vinyl acetate copolymer (manufactured by Sekisui Chemical Co., Ltd., Eslec A) 30 parts Toluene (solvent) 60 parts Methyl ethyl ketone 60 parts

The hologram transfer foil 11 described above is set in a transfer device (not shown), the heat-sensitive adhesive layer 14 of the hologram transfer foil 11 is brought into contact with the base material 2, and the support film 12 is pressed and heated by a heating means. The heat-sensitive adhesive layer 14 was thermocompression-bonded on the material 2, and the support film 12 was peeled off from the hologram transfer foil 11 to prepare an information recording medium 10 having the authenticity determination means 8 as shown in FIG.

Regarding the above-mentioned first embodiment, the analog information of the magnetic data layer, which is the security data peculiar to the information recording medium, is converted into digital information by AD conversion and recorded in the digital data recording section, and thereafter the security data reproduced in the same manner. When it was compared with the security data of the digital data recording part, good results were obtained.

Authenticity determination was performed using the information recording medium according to the present invention. An example of the authenticity determination is shown in FIGS. 8 and 9. FIG. 8 is a diagram showing a state when it is determined to be true, and FIG. 9 is a diagram showing a state when it is determined to be false.

In this authenticity judging method, as shown in FIGS. 8 and 9, first, the read waveform at the time of registration and the read waveform at the time of transaction (analog information) are respectively converted into 8 byte digital data by normal A / D conversion. To process. Then, the correlation of the obtained digital information is compared and calculated. If the numerical value of the correlation coefficient is high as shown in FIG. 8, it is determined to be genuine, and if the numerical value of the correlation coefficient is low as shown in FIG.

[0085]

In the information recording medium of the present invention, magnetic unevenness occurs in the magnetic data layer due to the influence of non-magnetic particles dispersed non-uniformly, and this magnetic unevenness becomes analog magnetic characteristic information of the information recording medium. . That is, it is possible to easily give the ID data by the magnetic material peculiar to the medium. In addition, the magnetic data layer that is easily visible from the outside can be hidden by a reflective thin film layer that improves the visibility of the hologram, and it can be expected to be effective as a display that has a three-dimensional appearance based on the hologram image, and the magnetic data layer can be easily read. Therefore, it is possible to provide an extremely useful authenticity determining means.

Further, by using the hologram transfer foil for forming the above-mentioned authenticity judging means, the above-mentioned information recording medium can be easily manufactured, and conventionally, the authenticity judging means must be provided at the manufacturing stage in a card or the like. However, according to the hologram transfer foil of the present invention, it is possible to add the authenticity determining means at the card issuing stage of a credit card, an ID card, etc., and it is possible to set the authenticating stage at the manufacturing stage. The constraint can be removed. Since the transfer method is used, the manufacturing process can be simplified.

[Brief description of drawings]

FIG. 1 is a plan view of an information recording medium of the present invention.

FIG. 2 is a cross-sectional view of the information recording medium of the first embodiment taken along the line XX of FIG.

3 is a schematic diagram showing a read signal waveform in a magnetic data layer of the information recording medium of FIG.

FIG. 4 is a cross-sectional view of the hologram transfer foil of the present invention.

FIG. 5 is a plan view of an information recording medium having a hologram transfer foil of the present invention transferred and formed on a substrate.

6 is a schematic diagram showing a read signal waveform in a magnetic data layer of the information recording medium of FIG.

7A and 7B are diagrams illustrating an example in which the magnetic recording unit of the information recording medium in FIG. 1 is tampered with and an example in which the magnetic recording unit in the information recording medium in FIG. 1 is dead copied to another information recording medium.

FIG. 8 is a diagram showing a state when it is determined to be true in the authenticity determination according to the present invention.

FIG. 9 is a diagram showing a state when it is determined to be false in the authenticity determination according to the present invention.

[Explanation of Codes] 1, 10 Information recording medium 2 Base material 3, 3'Magnetic data layer 4 Reflective thin film layer 5 Hologram forming layer 6 Protective layer 7, 7 ', 7 "Magnetic recording section 8 Authenticity judging means 9 Design Layer 11 Hologram transfer foil 12 Support 13 Releasable protective layer 14 Heat-sensitive adhesive layer

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location G03H 1/18 G03H 1/18 G06K 19/06 G06K 19/00 D

Claims (8)

[Claims] 1. A magnetic data layer representing magnetic unique information formed on at least one surface side of a base material by magnetic particles and non-magnetic particles having an average particle size larger than the magnetic particles.
An information recording medium comprising a reflective thin film layer, a hologram forming layer having a hologram image, and a protective layer, which are sequentially laminated. 2. A magnetic data layer representing magnetic unique information formed on at least one surface side of a base material by magnetic particles and non-magnetic particles having an average particle size larger than the magnetic particles.
A reflective thin film layer, a hologram forming layer having a hologram image, and a protective layer are sequentially laminated, and at least a part of the base material is provided with digital information holding the magnetic unique information. Information recording medium. 3. The magnetic recording section is provided on at least a part of the information recording medium, and digital information representing the magnetic unique information is recorded on the magnetic recording section. Information recording medium. 4. The magnetic particles according to claim 1, wherein the magnetic particles have an average particle diameter of 10 μm or less, and the non-magnetic particles have a particle diameter of 2 μm or more. Information recording medium described. 5. The information recording medium according to claim 1, wherein the magnetic particles have a coercive force of 60 Oe or less. 6. A support is formed on at least one side with a peelable protective layer, a hologram forming layer having a hologram image, a reflective thin film layer, magnetic particles and non-magnetic particles having an average particle size larger than the magnetic particles. A hologram transfer foil comprising a magnetic data layer representing magnetic unique information and an adhesive layer, which are sequentially laminated. 7. The information recording medium according to claim 6, wherein the magnetic particles have an average particle size of 10 μm or less, and the non-magnetic particles have a particle size of 2 μm or more. 8. The information recording medium according to claim 6, wherein the magnetic particles have a coercive force of 60 Oe or less.