JPH0890964A - Information recording medium and hologram transfer foil - Google Patents

Abstract

PURPOSE: To improve a forgery preventive property by a method wherein a random magnetic layer is provided in concealment under a reflective thin film layer for allowing a hologram shine in order to make sensing an information pattern by a third party difficult, and complicate an information pattern. CONSTITUTION: A random magnetic layer 2 wherein a magnetic material is ununiformly dispersed in a polymeric binder, a hologram forming layer 3 having a hologram pattern, a reflective thin film layer 4, and a protective layer 5 are successively laminated at least allover or partly on one face of a base material 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording medium and a hologram transfer foil used in, for example, a credit card, a cash card, a prepaid card and the like, and in particular, a random magnetic layer is hidden under a reflective thin film layer for shining a hologram. The present invention relates to an information recording medium and a hologram transfer foil that can improve anti-counterfeiting property by being provided.

[0002]

2. Description of the Related Art Generally, a hologram is widely used for surface decoration of various articles because it reproduces a stereoscopic image having an excellent stereoscopic aesthetics by using light interference.

Further, this type of hologram has an excellent three-dimensional appearance as a display and is difficult to copy or forge because it requires a high manufacturing technology. Application to information recording media such as cards is under consideration.

For example, as one form of application, a single information pattern is formed into a hologram, and by irradiating a laser beam in the visible wavelength region, this information pattern is imaged and reproduced on an image plane such as frosted glass. There is one in which a light reproduction hologram is created as a hologram transfer foil and the hologram transfer foil is transferred to a credit card or the like.

Further, from the request of practical use, it is assumed that the authenticity judgment is accelerated by the support of an optical sensor or the like, and the above-mentioned specific information pattern is formed by a simple identification mark such as a bar code or a carla code. There is a machine-readable hologram.

[0006]

However, in any of the above information recording media, since the information pattern is reproduced by the irradiation of light, the information pattern is easily perceived by a third party and may be forged. Have

In particular, a mechanical reading hologram has a problem that since a simple identification mark is used as an information pattern, there is a high possibility that it will be forged.

The present invention has been made in consideration of the above circumstances, and makes it difficult for a third party to sense an information pattern.
Further, in order to complicate the information pattern, by providing a random magnetic layer under the reflective thin film layer that illuminates the hologram by concealing it, an object is to provide an information recording medium and a hologram transfer foil capable of improving anti-counterfeiting property. And

[0009]

The invention according to claim 1 relates to a random magnetic layer in which a magnetic material is non-uniformly dispersed in a polymer binder on at least one surface of a substrate, or a part thereof, or a hologram. A hologram forming layer having a pattern,
This is an information recording medium in which a reflective thin film layer and a protective layer are sequentially laminated.

The invention according to claim 2 provides the information recording medium according to claim 1, wherein the magnetic material is
An information recording medium made of a soft magnetic material having a coercive force of 60 Oe or less.

Further, in the invention corresponding to claim 3, the peelable protective layer, the hologram forming layer having a hologram pattern, the reflective thin film layer, and the magnetic material are nonuniformly distributed on the polymer binder on one surface of the support. It is a hologram transfer foil in which a dispersed random magnetic layer and a heat-sensitive adhesive layer are sequentially laminated.

The invention according to claim 4 is the hologram transfer foil according to claim 3, wherein the magnetic material is a soft magnetic material having a coercive force of 60 Oe or less.

[0013]

Therefore, according to the present invention, by taking the above-mentioned means, the random magnetic layer is optically concealed by providing the random magnetic layer under the reflective thin film layer for illuminating the hologram, and visually observing the random magnetic layer. Making it impossible to detect,
Anti-counterfeit property can be improved.

Further, in the random magnetic layer, since the magnetic material dispersed nonuniformly forms a complicated information pattern, the forgery prevention property can be further improved.

Further, in the random magnetic layer, 60 Oe
When the following soft magnetic materials with low coercive force are used, the coercive force of the magnetic material is extremely small even if a magnetic pattern reading process using a magnet viewer or magnetic fluid is tried as a normal forgery process. Since the existence of the random magnetic layer itself is not found, the anti-counterfeit property can be further improved.

On the other hand, in the random magnetic layer, a high-sensitivity magnetic head is used in the regular matching process, so that the information pattern corresponding to the dispersion of the magnetic material is accurately detected through this magnetic head, and thus, The reliability of authenticity judgment can be improved.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing the structure of an information recording medium according to the first embodiment of the present invention. This information recording medium comprises a base material 1 and a magnetic data layer 2 formed on the base material 1.
A hologram forming layer 3 formed on the magnetic data layer 2; a reflective thin film layer 4 deposited on the hologram forming layer 3; and a protective layer 5 formed on the reflective thin film layer 4. It has and.

Here, as the base material 1, card paper (made by Tomagawa Paper Manufacturing) having a thickness of 0.2 mm is used.
As the base material 1, for example, a material such as paper, glass, plastic, metal, wood, etc. can be used. Specifically, the material and thickness are required strength, flexibility, weight, adhesiveness and processing. It is appropriately selected according to suitability.

The magnetic data layer 2 is a layer for generating a weak and complicated magnetic pattern, and a coating made by non-uniformly dispersing a magnetic material in a solvent containing a polymer binder is formed on the entire surface of the substrate 1. Alternatively, it is provided by partially coating, and here, the magnetic ink having the following composition is applied by a roll coating method to a thickness of 13 μm and dried.

Mn-Zn ferrite 100 parts (amorphous, particle size distribution 2 μm to 12 μm, holding power 60 Oe) Acrylic / cellulose resin 70 parts (VM-AL: Dainichiseika solids content 30%) Toluene (solvent) 30 parts As a method of forming such a magnetic data layer 2, other printing methods such as a gravure printing method, a screen printing method or an offset printing method, various printing methods such as an electrostatic printing method, an ink jet method or a transfer method, and the like. Film forming means such as partial vapor deposition and sputtering can be applied. The thickness of the magnetic data layer 2 is a thickness that can be read through the thickness of the hologram forming layer 3, and is preferably in the range of about 3 to 20 μm.

Other magnetic materials in the magnetic data layer 2 are Fe, Ni, Mn, Zn, Co, permalloy, sendust, Ni-Zn ferrite, Mn ferrite, Zn ferrite, FeS, magnetite, γ-. Powders of metals, alloys and metal compounds such as iron oxide, Co-deposited γ-iron oxide, barium ferrite, strontium ferrite and chromium dioxide can be used. Of these, 60 O from the viewpoint of generating a weak magnetic pattern.
Fe, Ni as soft magnetic materials having coercive force of e or less
And metal alloys such as Mn—Zn ferrite, Mn ferrite, and magnetite.

Further, as a method for non-uniformly dispersing the magnetic material, for example, a method using a magnetic powder having a wide particle size distribution of 0.5 to 10 μm, an average of 10 μm is used.
A method in which magnetic particles having a narrow particle size distribution with the following particle diameters are used to intentionally soften the dispersion without leaving the primary particles to leave aggregates of 10 μm or more, or magnetic particles having a particle diameter of 10 μm or more from the beginning. There is a method using. Since the resolution of the magnetic sensor is generally 20 μm or more,
The magnetic unique information (security magnetic data) can be read by the occurrence of magnetic unevenness of 20 μm or more.

The shape of the magnetic material may be needle-like, spherical, scale-like (flake-like) or amorphous, but is not limited thereto. The shape of the magnetic material is preferably such that the magnetic data layer 2 can be thinly formed and magnetic unevenness is easily generated in order to improve the concealing property and non-uniformity of the information pattern. Are preferred.

On the other hand, as the polymer binder, acrylic resin, polyester resin, urethane resin, vinyl chloride resin, polyamide resin, polyvinyl acetate resin, vinyl chloride resin, polyamide resin, polyvinyl acetate resin, vinyl chloride-vinyl acetate. Thermoplastic resins and thermosetting resins such as copolymer resins, rubber resins, epoxy resins, and cellulose resins can be used, but are not limited to these.

The hologram forming layer 3 is a layer for forming a hologram by heating and pressing, for example, by a surface relief type hologram stamp. Here, a hologram forming varnish having the following mixing ratio is formed by a roll coating method. It is formed by applying it to a thickness of 2.0 μm and drying it.

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 As a method for forming such a hologram forming layer 3, Alternatively, a blade coating method or the like can be applied. The thickness of the hologram forming layer 3 is usually about 0.5 to 5 μm.
Is set in the range. Further, such a hologram forming layer 3 does not exhibit adhesiveness to a surface relief type stamper or hologram stamper plated with nickel, gold, chromium or the like, and has good adhesiveness to the reflective thin film layer 4. Is shown.

The hologram forming surface is embossed by a nickel plate having relief-shaped hologram irregularities being adhered to such a hologram forming layer 3 at a heat pressure of 150 ° C.-10 kg / cm ^2. It is molded. The hologram forming surface may be any surface having a hologram pattern on the surface of the layer, and a grating having a fine concavo-convex shape by, for example, a two-beam interference or a diffraction grating (grating) by an electron beam (EB). Holograms and the like are also applicable.

The resin used for the hologram forming layer 3 is preferably a two-component reaction urethane resin, for example.
This two-component reactive urethane resin has 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. 2 like this
Liquid-reactive urethane resins include polyol components such as polyether polyols, polyester polyols, acrylic polyols and the like, and polyol-curable urethane resins composed of a prepolymer having an isocyanate group in view of various physical properties such as solvent resistance, heat resistance, and processability. Appropriate. Particularly preferably, the glass transition point of the polyol component is 70 to 1
It is an acrylic polyol resin having an OH group of 50 to 150 in the range of 50 ° C. Such an acrylic polyol resin has good coating suitability and extremely good embossing moldability required for holograms. As the isocyanate component, toluene diisocyanate (TDI), xylene diisocyanate (XD)
I), hexamethylene diisocyanate (HMDI) and the like can be used.

Further, the resin used for the hologram forming layer 3 may contain an adjusting agent for improving coating suitability. Examples of the adjusting agent include cellulosic resins such as nitrocellulose, acetylcellulose, cellulose acetate butyrate, cellulose acetate propionate, ethyl cellulose and methyl cellulose. Such an adjusting agent can be added at a maximum of 30% by weight, preferably 5 to 20% by weight, based on the two-component reactive urethane resin.

The reflective thin film layer 4 is a layer for reflecting the incident light and illuminating the hologram while hiding the magnetic data layer 2 from visual observation. Here, aluminum having a thickness of 50 nm is formed by a vacuum deposition method. There is. The reflective thin film layer 4 can be formed by a sputtering method, an ion plating method, or the like using an inorganic material having a metallic luster such as tin, silver, gold, chromium, or nickel. It is preferably in the range of 40 to 100 nm.

The protective layer 5 is a layer for preventing chemical and mechanical damage from the outside of the reflective thin film layer 4 to the magnetic data layer 2, and here, is kneaded with the following compounding ratio. The paint is applied and formed in a thickness of 3.0 μm by the gravure coating method.

Polyester resin 30.0 parts (manufactured by Toyobo: Byron 200) Polyethylene wax 0.2 parts Toluene 40.0 parts Methyl ethyl ketone 30.0 parts Protective layer 5 is required strength, flexibility, adhesiveness, processing The material and thickness can be appropriately selected depending on suitability and the like. Other materials for the protective layer 5 include acrylic resin, urethane resin, vinyl chloride resin, polyamide resin, polyvinyl acetate resin, silicone resin, rubber resin, ethylene-vinyl acetate copolymer resin, ethylene-acrylic acid copolymer resin. Or ethylene-acrylic acid ester copolymer can be used, and in order to improve wear resistance, to the above resin,
It is possible to use a material to which a lubricant such as polyethylene wax, silicone oil or fatty acid amide is added.

Next, the operation of the information recording medium having the above structure will be described.

In this information recording medium, since the reflective thin film layer 4 covers the hologram forming layer 3 and the magnetic data layer 2 from above, the reflective thin film layer 4 illuminates the hologram and the content displayed by the hologram forming layer 3 is displayed. While making the magnetic data layer 2 visible, the magnetic data layer 2 is optically hidden so that the magnetic data layer 2 cannot be visually sensed.

Further, the magnetic data layer 2 is magnetically concealed from ordinary reading means because the coercive force of the magnetic material is as low as 60 Oe or less. For example, even if a counterfeiter attempts a magnetic pattern reading process using a reading means such as a magnet viewer or a magnetic fluid, the magnetic data layer 2
Since only a weak magnetism corresponding to a holding force of 60 Oe or less is generated, it is not detected by a normal reading means. That is, the existence of the magnetic data layer 2 itself is not discovered by the counterfeiter.

On the other hand, this magnetic data layer 2 is subjected to, for example, a magneto-resistance effect (magneto-resistance effect) in a normal verification process.
By using a high-sensitivity magnetic head such as a ffect) type MR head, as shown in FIG. 2, an information pattern corresponding to the dispersion of the magnetic material is accurately detected through this magnetic head. Since this information pattern corresponds to uneven distribution of the magnetic material, it differs from individual media like a fingerprint and is extremely complicated, so that elaborate forgery is almost impossible.

Therefore, even if it is forged, a subtle deviation is detected from both by detecting the information pattern detected from the forged information recording medium and the reference information pattern read in advance. It can be expected to find an information recording medium forged.

As described above, according to the first embodiment, since the magnetic data layer 2 is provided below the reflective thin film layer 4 for illuminating the hologram, the magnetic data layer 2 is optically concealed and the third It is impossible for a person to perceive it visually, thus improving the forgery prevention property.

Further, according to the present embodiment, the magnetic data layer 2
In the above, since the non-uniformly dispersed magnetic material forms a complicated information pattern, it is possible to further improve the forgery prevention property.

Further, in the magnetic data layer 2, 60 Oe
When the following soft magnetic materials with low coercive force are used, the coercive force of the magnetic material is extremely small even if a magnetic pattern reading process using a magnet viewer or magnetic fluid is tried as a normal forgery process. Since the existence of the magnetic data layer itself is not found from the above, the forgery prevention property can be further improved.

On the other hand, in the magnetic data layer 2, a highly sensitive magnetic head is used in the regular matching process, so that the information pattern corresponding to the dispersion of the magnetic material is accurately detected through this magnetic head. Therefore, the reliability of authenticity determination can be improved.

Next, a hologram transfer foil according to a second embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a cross-sectional view showing the structure of this hologram transfer foil. The same parts as those in FIG. 1 are designated by the same reference numerals, and substantially the same parts are designated by a subscript a, and their detailed description is omitted. Only different parts will be described.

The hologram transfer foil according to this embodiment is the first
It has the same function as that of the information recording medium according to the embodiment, and it can be used as an information recording medium by being transferred onto a base material by heat and pressure or entirely or partially.

As shown in FIG. 3, this hologram transfer foil is formed on a support film 6, a peelable protective layer 7 which is peelably provided on the support film 6, and a peelable protective layer 7. On the hologram forming layer 3, the hologram forming layer 3, the reflective thin film layer 4 formed on the hologram forming layer 3, the magnetic data layer 2a formed on the reflective thin film layer 4, and the magnetic data layer 2a. Heat-sensitive adhesive layer 8 formed on
It has and. The hologram transfer foil is placed on a substrate with the heat-sensitive adhesive layer 8 facing downward, transferred by heat and pressure, and then the support film 6 is peeled off for use.

Here, the support film 6 has heat resistance so that it is not softened and deformed by the heat and pressure at the time of transfer, and for example, polyethylene terephthalate film, polyethylene naphthalate film and the like can be used, and here, 25 μm. A polyethylene terephthalate film having a thickness of 1 is used.

The peelable protective layer 7 has a property of being easily peeled from the support film 6 (thermoplasticity) during thermal transfer.
It has the property (rubbing resistance) of preventing chemical and mechanical damage from the outside of the hologram forming layer 3 or the magnetic data layer 2a after transfer, and a mixture of a thermoplastic resin and a rubbing agent is suitable. It is possible to use a peeling protection varnish that has been made into a paint with a different solvent. Here, it is formed by applying a peeling protection varnish having the following compounding ratio to a thickness of 2 μm by a gravure coating method and drying.

Acrylic resin 25 parts Carnauba wax 5 parts Toluene 30 parts Methyl ethyl ketone 30 parts Methyl isobutyl ketone 15 parts As a method for forming such a peelable protective layer 7, other methods such as a roll coating method or a bar code coating method may be used. Etc. are applicable.

As the thermoplastic resin used for the peelable protective layer 7, polymethylmethacrylate or epoxy resin can be used, and these have the property of being easily peeled off. On the other hand, as anti-friction agents, Teflon powder, polyethylene powder, animal wax, plant wax, mineral wax, natural wax such as petroleum wax, synthetic hydrocarbon wax, fatty acid alcohol and acid wax, fatty acid ester and glyceride Wax, hydrogenated wax, synthetic ketone wax, amine and amide wax, chlorinated hydrocarbon wax,
Synthetic animal wax waxes, synthetic waxes such as alpha-olefin waxes, and metal salts of higher fatty acids such as zinc stearate can be used.

The hologram forming layer 3 is formed of the first
The same hologram forming varnish as in the above example is applied and formed to a thickness of 2 μm by the roll coating method, and the hologram pattern is provided on the hologram forming surface.

The reflective thin film layer 4 is formed by depositing aluminum to a thickness of 50 nm by the vapor deposition method as described above.

Unlike the first embodiment, the magnetic data layer 2a is formed by applying a magnetic ink having the following composition to a thickness of 10 μm by a roll coating method.

Flake-like magnetic powder Ni 100 parts (thickness 2 μm, average particle size 20 μm, holding power 40 Oe) Urethane resin 30 parts Methyl ethyl ketone 30 parts Toluene (solvent) 30 parts The heat-sensitive adhesive layer 8 is plastic when heat is applied. It has the property of adhering to the surface of the base material (transfer target) such as material,
A heat-sensitive adhesive varnish obtained by coating a composition composed of a thermoplastic resin with a suitable solvent can be used. Here, the heat-sensitive adhesive varnish with the following compounding ratio was prepared by the roll coating method.
It is formed to have a thickness of μm.

Polyester resin 30 parts (Toyobo: Byron 200) Vinyl chloride-vinyl acetate copolymer 30 parts (Sekisui Chemical Co., Ltd., S-REC A) Barium sulfate 50 parts Toluene 60 parts Methyl ethyl ketone 60 parts The heat-sensitive adhesive layer 8 is formed. As the method, a gravure coating method, a bar coat coating method or the like can be used.

Further, as the thermoplastic resin used for the heat-sensitive adhesive layer 8, in order to lower the temperature required for heat transfer,
Those having a glass transition point Tg of 50 ° C. to 130 ° C. are preferable. A thermoplastic resin having a glass transition point Tg of 130 ° C. or higher increases the temperature required for thermal transfer, and may deform the plastic substrate (transfer target) during thermal transfer, or may discolor or destroy the heat-sensitive adhesive layer. Is.

Examples of the thermoplastic resin usable as the heat-sensitive adhesive layer 8 include polyester such as linear saturated polyester, vinyl chloride resin such as polyvinyl chloride-vinyl acetate copolymer resin, polyacrylic acid, polyacrylic acid. -2-Methoxyethyl, polymethyl acrylate, poly-2-naphthyl polyacrylate, isobornyl polyacrylate, polyacrylic acid, polymethacrylomethyl, polyethyl methacrylate, poly-t-butyl methacrylate, polyisobutyl methacrylate , Polyphenyl methacrylate,
Acrylic resins such as copolymer resins of methyl methacrylate and alkyl methacrylate (wherein the alkyl group has 2 to 6 carbon atoms), polystyrene, and polyvinylbenzene, styrene-butadiene copolymer resin, styrene and alkyl methacrylate (provided that the alkyl group is There are vinyl resins such as copolymer resins having 1 to 6) carbon atoms.

In the hologram transfer foil thus constructed, as shown in FIG. 4, the transfer foil main body 9 is, for example, on a vinyl chloride card member 11 having a strip-shaped magnetic recording layer 10 along the longitudinal direction. Placed at 130 ℃ -300g / c
By applying heat and pressure of m ² , the card member 11
After being transferred, the support film 6 alone is peeled and removed for practical use. In addition,
In this transfer step, a heating temperature higher than the softening point of the thermoplastic resin of the heat-sensitive adhesive layer 8 is required. The heating temperature is usually about 1
The temperature is 00 ° C to 250 ° C, and the pressing time is preferably 10 seconds or less.

Next, the operation of the hologram transfer foil configured as described above will be described.

In this hologram transfer foil, since the reflective thin film layer 4 covers the magnetic data layer 2a from above as described above, the reflective thin film layer 4 illuminates the hologram to display the content displayed by the hologram forming layer 3. While making it easy to see, the magnetic data layer 2a is optically hidden so that the magnetic data layer 2a cannot be visually sensed.

Here, in the case of this hologram transfer foil, since the strip-shaped magnetic recording layer 10 is visually recognized on the card member 11, the magnetic data layer 2a is further provided below the hologram forming layer 3.
It is difficult to predict that the presence of the magnetic field is present, and it is more difficult to sense the magnetic data layer 2a as compared with the first embodiment.

Since the magnetic data layer 2a has a low coercive force of 40 Oe or less, the magnetic data layer 2a is magnetically concealed from the ordinary reading means. Not done.

On the other hand, this magnetic data layer 2a has a non-uniform dispersion of the magnetic material as shown in FIG. The corresponding complex information pattern is accurately detected via this magnetic head.

Therefore, even if it is forged, it is forged from the subtle difference between the information pattern detected from the hologram transfer foil on the forged card member and the genuine information pattern read in advance, as described above. It can be expected to find such an information recording medium.

In the case of this hologram transfer foil, the information detected in advance from the hologram transfer foil is recorded by recording a pre-read genuine information pattern on the magnetic recording layer 10 on the card member 11 as identification digital information. The pattern and the pre-recorded digital information for identification can be collated quickly, so that the time for the collation process can be expected to be shortened.

As described above, according to the second embodiment, in addition to the effect of the first embodiment, since the magnetic recording layer 10 is visually recognized on the card member 11, the magnetic recording layer under the hologram forming layer 3 is magnetic. Sensing the data layer 2 can be made more difficult.

Further, according to this embodiment, the card member 11
Since the magnetic recording layer 10 has the magnetic recording layer 10, it is possible to record a genuine information pattern read in advance on the magnetic recording layer 10 on the card member 11, and thus it is possible to expect a reduction in the time of the matching process.

In the first embodiment, the case where the magnetic data layer 2 to the protective layer 5 are laminated on a part of one side of the base material 1 has been described, but the present invention is not limited to this, and the base material 1 may be formed. Even if the magnetic data layer 2 to the protective layer 5 are laminated on all of one side or both sides of the base material 1, the same effects can be obtained by implementing the present invention in the same manner.

In the second embodiment, the case where the heat-sensitive adhesive layer 8 and the magnetic data layer 2a are separately provided has been described, but the present invention is not limited to this, and a thermoplastic resin that can be used as the heat-sensitive adhesive layer 8 is provided. In addition to providing the same effect as the present invention, even if the heat-sensitive adhesive layer 8 also serving as the magnetic data layer 2a is provided by coating the paint with a non-uniformly dispersed magnetic material on the The manufacturing process can be simplified.

Besides, the present invention can be variously modified and implemented without departing from the gist thereof.

[0070]

As described above, according to the present invention, in order to make it difficult for a third party to sense the information pattern and to complicate the information pattern, a random magnetic layer is formed under the reflective thin film layer that illuminates the hologram. It is possible to provide an information recording medium and a hologram transfer foil, which can improve the forgery prevention property, by hiding and providing the information recording medium.

[Brief description of drawings]

FIG. 1 is a sectional view showing the structure of an information recording medium according to a first embodiment of the invention,

FIG. 2 is a signal waveform diagram showing an example of an information pattern in the embodiment.

FIG. 3 is a sectional view showing the configuration of a hologram transfer foil according to a second embodiment of the present invention,

FIG. 4 is a plan view showing the appearance of a card member to which a part of the hologram transfer foil is transferred in the same example;

FIG. 5 is a signal waveform diagram showing an example of an information pattern in the same example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Substrate, 2, 2a ... Magnetic data layer, 3 ... Hologram forming layer, 4 ... Reflective thin film layer, 5 ... Protective layer, 6 ... Support film, 7 ... Releasable protective layer, 8 ... Heat-sensitive adhesive layer, 9 ... Transfer foil main body, 10 ... Magnetic recording layer, 11 ... Card member.

Claims (4)

[Claims] 1. A random magnetic layer in which a magnetic material is nonuniformly dispersed in a polymer binder on at least one surface of a substrate, a hologram forming layer having a hologram pattern, a reflective thin film layer, and a protective layer. An information recording medium, which is formed by sequentially stacking layers. 2. The information recording medium according to claim 1, wherein the magnetic material is a soft magnetic material having a coercive force of 60 Oe or less. 3. A peelable protective layer, a hologram forming layer having a hologram pattern, a reflective thin film layer, a random magnetic layer in which a magnetic material is non-uniformly dispersed in a polymer binder, and heat-sensitive adhesion on at least one surface of a support. A hologram transfer foil, which is formed by sequentially stacking material layers. 4. The hologram transfer foil according to claim 3, wherein the magnetic material is a soft magnetic material having a coercive force of 60 Oe or less.