JP2001225556A - Information recording medium and recording method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information recording medium and the recording method of the same, capable of effecting a contact system writing indication recording through a thermal head or the like and a non-contact system writing indication recording effected by emitting laser beams in parallel, further, capable of deciding a truth or a falsehood efficiently by processing an information, such as a mechanical reading code or the like, simply in a sealed condition. SOLUTION: The indication recording is effected by recording on the information recording medium 1A, provided with a substrate 2, a light absorbing layer 3 formed on at least one side of the substrate, a first heat sensitive color developing layer 4 formed on the light absorbing layer, an insulating intermediate layer 5 formed on the first heat sensitive color developing layer, and a second heat sensitive color developing layer 6 formed on the intermediate layer. Upon effecting the indication recording on the first heat sensitive color developing layer of the information recording medium, the recording is effected by emitting laser beams from the upper side of the information recording medium and upon effecting the indication recording on the second heat sensitive layer, the recording is effected through the contact of the thermal head with the upper side of the information recoding medium.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to information on a card or the like which can be used in combination with contact type writing / display recording using a thermal head or the like and non-contact type writing / display recording performed by irradiating a laser beam. The present invention relates to a recording medium and a recording method thereof.

[0002]

2. Description of the Related Art Conventionally, when an information recording medium such as a card is issued to its user, variable information such as an ID code and a name, which differs for each card, is displayed by various means on a card which has been prepared in advance. are doing. For example, embossing is performed by applying a partial pressure to a predetermined portion of the card base material to form an embossed character, or a metal thin film layer, a heat-sensitive layer, and a protective film are sequentially laminated on the card base material. In addition, there is known an image (character) forming and erasing method in which a heated thermal head is brought into contact with the surface of a card using a thermal head by utilizing a change in transparency depending on the temperature of the heat-sensitive layer to perform recording and display.

However, when an information recording medium such as a card is issued, the name of the issuing organization is displayed and recorded in advance.
Thereafter, when the information recording medium is issued to the user, information such as the user name and the user code may be displayed and recorded again. In this case, if the same display recording method is used, the name of the issuer organization can be tampered with, which is a problem in preventing fraud. Therefore, it is preferable that the information can be displayed on the information recording medium by using two different display recording methods.

[0004] In addition, as a determination method for determining the authenticity of an information recording medium such as a card, by irradiating infrared rays,
There is a method of reading the machine-readable code, which is displayed in advance so that it cannot be seen, with an infrared irradiation reader to determine whether it is true or false.However, to display the machine-readable code invisible, a special transparent ink is used. However, it is inconvenient because it is difficult to display different information for each information recording medium.

[0005]

According to the present invention, it is possible to use both a contact type writing / display recording by a thermal head or the like and a non-contact type writing / display recording performed by irradiating a laser beam. Provided is an information recording medium and a recording method of the information recording medium, in which information such as a machine-readable code is easily processed into a concealed state so that authenticity determination can be efficiently performed.

[0006]

In order to achieve the above object, an information recording medium of the present invention comprises a base, a light absorbing layer formed on at least one side of the base, and a light absorbing layer formed on the base. A first heat-sensitive coloring layer formed thereon, a heat-insulating intermediate layer formed on the first heat-sensitive coloring layer, and a second heat-sensitive coloring layer formed on the heat-insulating intermediate layer. , Are provided. The first thermosensitive coloring layer contains a dye having absorption in a near infrared region.

Further, the information recording medium of the present invention comprises a base,
A light-absorbing thermosensitive coloring layer formed on at least one side of the substrate, a heat-insulating intermediate layer formed on the light-absorbing thermosensitive coloring layer, and a heat-sensitive intermediate layer formed on the heat-insulating intermediate layer And a color-forming layer. The light-absorbing thermosensitive coloring layer contains a dye having absorption in a near infrared region.

Further, according to the recording method for an information recording medium of the present invention, there are provided a base, a light absorbing layer formed on at least one side of the base, and a first thermosensitive coloring formed on the light absorbing layer. Layer, a heat-insulating intermediate layer formed on the first heat-sensitive coloring layer, and a second heat-sensitive coloring layer formed on the heat-insulating intermediate layer. A recording method for an information recording medium for performing display recording, wherein when performing display recording on the first thermosensitive coloring layer of the information recording medium, the recording is performed by irradiating a laser beam from above the information recording medium; When performing display recording on the thermosensitive coloring layer, the display recording is performed by contacting a thermal head on the information recording medium.

Further, the recording method for an information recording medium of the present invention comprises a base, a light-absorbing thermosensitive coloring layer formed on at least one side of the base, and a light-absorbing thermosensitive coloring layer formed on the light-absorbing thermosensitive coloring layer. A method of recording information on an information recording medium, comprising: a heat insulating intermediate layer, a heat-sensitive coloring layer formed on the heat insulating intermediate layer, and a display device. When performing display recording on the light-absorbing thermosensitive coloring layer of the above, it is performed by irradiating a laser beam from the information recording medium, and when performing display recording on the thermosensitive coloring layer, the thermal head is placed on the information recording medium. It is characterized by performing by contact.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the information recording medium and the recording method of the present invention will be described in detail. FIG. 1 is a sectional view of a first embodiment of an information recording medium according to the present invention, FIG. 2 is a sectional view of a second embodiment of the information recording medium according to the present invention, and FIG. FIG. 4 is a diagram showing a state in which display recording is performed on a first thermosensitive coloring layer by irradiating a recording medium with a near-infrared laser. FIG. FIG. 5 is a view showing a state in which display recording is performed on the thermosensitive coloring layer of FIG. 5, and FIG. 5 shows that the information recording medium of the first embodiment is irradiated with near-infrared laser to perform display recording at a plurality of locations of the first thermosensitive coloring layer. FIG. 6 is a diagram showing a state in which a thermal head is in contact with the information recording medium of the first embodiment, and FIG. 6 is a diagram showing a state in which the second thermosensitive coloring layer is colored. In the information recording medium according to the first embodiment, the first thermosensitive coloring layer has a display recording color. FIG. 8 is a diagram showing a state in which the display record is read by an infrared reader while being concealed by the thermosensitive coloring layer of FIG. FIG. 9 is a diagram showing a state in which the information recording medium of the second embodiment is run while being in contact with a thermal head to perform display recording on the thermosensitive coloring layer.

First, a first embodiment of the information recording medium according to the present invention will be described. As shown in FIG. 1, an information recording medium 1A according to a first embodiment of the present invention includes a sheet-shaped or plate-shaped base 2, a light-absorbing layer 3 formed on at least one side of the base, A first heat-sensitive coloring layer 4 formed on the absorbing layer 3, a heat-insulating intermediate layer 5 formed on the first heat-sensitive coloring layer 4, and a heat-insulating intermediate layer 5 formed on the heat-insulating intermediate layer 5. The second heat-sensitive coloring layer 6 and a protective layer 7 provided on the second heat-sensitive coloring layer 6 as required. At this time, the thermosensitive coloring layers 4 and 6 and the light absorbing layer 3
May be formed so as to cover the entire inner surface or only a part of the card shape.

The base 2 is in the form of a sheet or a plate. For example, vinyl chloride, ABS resin, AS resin, polyester, polypropylene, styrene resin,
Acrylic, polycarbonate, vinyl chloride-vinyl acetate copolymer, synthetic resin such as PET-G, or paper, nonwoven fabric, metal deposit, or the like is used. Also, on the base 2,
For example, a print layer may be provided by printing a picture, pattern, character, or the like of a desired design by silk screen printing, offset printing, or the like.

The light-absorbing layer 3 contains a light-absorbing material for converting light into heat, does not impede the coloring of the first and second thermosensitive coloring layers 4 and 6, and further reduces the ground color. A colorless or pale-colored pigment is used for suppression. The light-absorbing layer 3 is formed by mixing a light-absorbing material with a binder such as a water-based or solvent-based resin and coating or printing. Examples of the light absorbing material used for the light absorbing layer 3 include phthalocyanine-based materials,
Naphthalosinian compounds, bisthiourea compounds, squarylium compounds, azurenium compounds, triphenylamine compounds,
Trisazo, diphenylmethane, triphenylmethane, triallylmethane, quinone, naphthoquinone, anthraquinone, azo, immonium, diimmonium, metal complex, metal sulfide and thiourea compounds, phosphorus compounds Copper compounds and the like can be used, and two or more of the above may be used in combination.

The first heat-sensitive coloring layer 4 and the second heat-sensitive coloring layer 6 include an electron-donating dye precursor and an electron-accepting compound which are colored by a thermal melting reaction, and a sensitizer, a fading inhibitor, Fillers such as pigments and lubricants, dispersants, binders and the like are included. The first thermosensitive coloring layer 4 and the second thermosensitive coloring layer 6 are formed by coating, printing, etc. on the base 2. The layer is formed by gravure, roll coating, spray coating, dipping, or the like. As the electron-donating dye precursor, those that are adapted to this type of heat-sensitive material as leuco dyes, and in the case of full color, those that develop yellow, magenta, and cyan are selected, for example, triphenylmethane. system,
Leuco compounds of dyes such as fluoran, phenothiazine, auramine, spiropyran and indolinophthalide are preferably used.

The electron-accepting compound is used as a color developer in combination with an electron-donating dye precursor, and has heat resistance enough to withstand hot press, and print recording. It is necessary to react with high sensitivity to the heat applied at the time of the reaction, and for example, the following compounds can be used. Phenolic substances such as bisphenol A, octylphosphonic acid, nonylphosphonic acid, decylphosphonic acid, dodecylphosphonic acid, tetradecylphosphonic acid, hexadecylphosphonic acid, octadecylphosphonic acid, eicosylphosphonic acid, etc. and α-hydroxyoctanoic Acids, α-hydroxydodecanoic acid, α-hydroxytetradecanoic acid, α-hydroxyoctadecanoic acid, α-thiodiphenyl acid, quinones and the like.

As the sensitizer, for example, 1-hydroxy-2
-Phenyl naphthoate, p-benzylbiphenyl, stearic acid amide, behenic acid amide, methylenebisstearic acid amide, dibenzyl oxalate, tolylbiphenyl ether, fatty acid amides and the like.

Examples of the anti-fading agent include analogs of a developer in which a hydroxyl group is blocked, organic metal salts such as zinc salts, and hindered phenols. Further, the pigment is required to have no hiding properties, a high oil absorption, a high pH, and no activity with respect to the dye. In addition, if it is a white pigment, it has the effect of scattering visible light and near-infrared light around,
Promotes the absorption of near-infrared light into the light absorber and increases the heat generation effect. Examples of the pigment include calcium carbonate, aluminum hydroxide, silicate, zeolite, silica, kaolin clay, and urea formalin resin.

As a binder, a water-soluble resin is mainly used as a main component, and polyvinyl alcohol, starch, modified starch, methylcellulose, hydroxyethylcellulose,
Gelatin, casein, alkylene-maleic anhydride copolymer, polyvinylpyrrolidone, acrylamide-based water-soluble resin, styrene-butadiene copolymer emulsion,
Examples include urea resins, melamine resins, amide resins, polyurethane resins, and the like. Further, various auxiliary agents can be added as needed.

The first thermosensitive coloring layer 4 contains a dye having absorption in the near infrared region after coloring, while the second thermosensitive coloring layer 4 contains a second coloring matter.
The second thermosensitive coloring layer 6 is made into a coloring state by making the thermosensitive coloring layer 6 contain no dye having no absorption in the near-infrared region after coloring, thereby displaying and recording on the first thermosensitive coloring layer 4. The read code display can be read by an infrared reader to keep information confidential.

It is desirable that the heat-insulating intermediate layer 5 has no activity with respect to the dye and has no concealing property, and blocks heat from the first thermosensitive coloring layer 4 and the second thermosensitive coloring layer 6. Therefore, it is desirable to have a thickness of 1 to 3 μm. Examples of the material of the heat-insulating intermediate layer 5 include pigments such as calcium carbonate, aluminum hydroxide, silicate, zeolite, silica, kaolin clay, and urea formalin resin.
And polyvinyl alcohol, starch, modified starch,
Methylcellulose, hydroxyethylcellulose, gelatin, casein, alkylene-maleic anhydride copolymer, polyvinylpyrrolidone, acrylamide-based water-soluble resin, styrene-butadiene copolymer emulsion, urea resin, melamine resin, amide resin, polyurethane resin, etc. It is selected from binder resins, and is formed in a state that does not impair transparency and does not hinder transmission of near-infrared light.

Further, a protective layer 7 may be provided on the second thermosensitive coloring layer 6. By providing the protective layer 7, each layer can be protected from adverse effects due to external heat, scratches, and the like at the time of forming. The protective layer 7 has chemical resistance, water resistance, abrasion resistance, and transparency, and may be selected from the binder resins described above, and is usually formed to have a thickness of 0.1 to 10 μm. In particular, a thermosetting resin or an ionizing radiation-curable resin such as an ultraviolet ray or an electron beam is usually used in order to impart friction resistance, chemical resistance and stain resistance to the surface. Also,
An anchor layer may be provided between the protective layer 7 and the second thermosensitive coloring layer 6 in order to enhance the adhesion.

Next, a second embodiment of the information recording medium according to the present invention will be described. As shown in FIG. 2, an information recording medium 1B according to a second embodiment of the present invention includes a sheet-shaped or plate-shaped substrate 2 and a first light-absorbing heat-sensitive material formed on at least one side of the substrate 2. A color-forming layer 8, a heat-insulating intermediate layer 5 formed on the first light-absorptive heat-sensitive color-forming layer 8, a heat-sensitive color forming layer 9 formed on the heat-insulating intermediate layer 5, And a protective layer 7 provided on the thermosensitive coloring layer 9. In this case, the light-absorbing thermosensitive coloring layer 8 and the thermosensitive coloring layer 9 may be formed so as to cover the entire inner surface of the card shape or to cover only a part thereof.

The light-absorbing thermosensitive coloring layer 8 includes, for example, a light-absorbing material in the first thermosensitive coloring layer and the second thermosensitive coloring layer used in the information recording medium 1A of the first embodiment. Use the one prepared by

Next, a method of performing display recording on the information recording medium 1A according to the first embodiment of the present invention will be described with reference to FIGS. First, when display recording is performed on the first thermosensitive coloring layer 4 of the information recording medium 1A, as shown in FIG. Irradiation. At this time, by irradiating the wavelength of the writing laser light 11 in accordance with the maximum absorption wavelength of the light absorbing layer 3, the light absorbing layer 3 generates heat and the first layer of the upper layer of the light absorbing layer 3 is affected by this heat. The heat-sensitive coloring layer 4 develops a color. At this time, since the heat is blocked by the heat-insulating intermediate layer 5, the second thermosensitive coloring layer 6 does not develop color.

When performing display recording or the like by coloring the second thermosensitive coloring layer 6, the thermal head 13 is brought into contact with the surface of the protective layer 7, or the thermal head 13 is brought into contact with the surface of the protective layer 7. The second thermosensitive coloring layer 6 is colored under the influence of the heat by moving while heating. On this occasion,
Since heat is blocked by the heat-insulating intermediate layer 5, the first thermosensitive coloring layer 4 does not develop color.

Next, using the information recording medium 1A of the first embodiment of the present invention, the first heat-sensitive
A case where the machine-readable code recorded on the thermosensitive coloring layer 4 is concealed and invisible so that security is maintained and the machine-readable code is read will be described.
In this case, the first thermosensitive coloring layer 4 contains a dye having absorption in the near infrared region. First, as shown in FIG. 5, the information recording medium 1A is irradiated from the laser light source 10 with the writing laser light 11 through the objective lens 12,
For example, a bar code 14 is recorded on the first thermosensitive coloring layer 4 as a machine-readable code. Next, the thermal head 13
Is moved while being in contact with the surface of the protective layer 7 and heated so that the second thermosensitive coloring layer 6 is colored so as to cover the bar code 14. By causing the second thermosensitive coloring layer 6 to develop a color, the display of the bar code 14 is made invisible by the coloring portion 15.

The coloring portion 15 of the second thermosensitive coloring layer 6
When reading the bar code 14 concealed by the
Using an infrared barcode reader 16 as shown in
By irradiating the near infrared ray 17 to the information recording medium 1A, the reflection is detected and the barcode 14 is read.

Next, a method of performing display recording on the information recording medium 1B according to the second embodiment of the present invention will be described with reference to FIGS. As shown in FIG.
Irradiates the information recording medium 1B via the objective lens 12 with the writing laser beam 11 from above, the light-absorbing material contained in the light-absorbing thermosensitive coloring layer 8 generates heat. . When performing display recording on the thermosensitive coloring layer 9, the thermal head 13 is placed on the information recording medium 1B.
Is contacted to cause the heat-sensitive coloring layer 9 to develop color.

When a pulse laser beam is used as the laser beam, light having a high output is irradiated only for a very short period of time, so that heat does not accumulate on the substrate or the like. This is preferable because design processing, drawing of characters, and the like can be performed without causing damage such as the above. Also,
By controlling the spot diameter of the pulsed laser light, various types of design displays such as different patterns and patterns, image information displays such as face photographs, and machine-readable information different for each information recording medium 1 such as a bar code,
Since display records such as OCR characters and OMR can be precisely formed by fine drawing, a wide range of display records can be selected.

[0030]

Example 1 A polyethylene terephthalate film (E-20 manufactured by Toray Industries, Inc.) having a thickness of 188 μm was used as a substrate 2, and the light absorbing layer 3 and the first layer were formed on one surface of the substrate 2 by gravure printing. The information recording medium 1A was manufactured by laminating the thermosensitive coloring layer 4, the heat insulating intermediate layer 5, the second thermosensitive coloring layer 6, and the protective layer 7 in this order. Here, the first light absorbing layer 3 includes a near infrared light absorbing substance S110510 (manufactured by ICI) and a solvent (10% aqueous solution of polyvinyl alcohol).
And a mixture of isocyanate curing agent and dried.
It was formed so as to have a thickness of about 2 μm.

Subsequently, as a first thermosensitive coloring layer 4, a red dye (3-diethylamino-7-chlorofluorane)
A mixture of a developer (3,3-dichlorophenylthiourea) and a solvent (10% aqueous solution of polyvinyl alcohol) was dried and then formed on the light absorbing layer 3 to a thickness of 5 μm.

Next, a 10% aqueous solution of polyvinyl alcohol was used as the heat-insulating intermediate layer 5 and formed to a thickness of 2 μm after drying. As the thermosensitive coloring layer 4, a black dye (3
-(N-ethyl-N acylamino) -6-methyl-7-
Anilinofluorolane), a developer (bisphenol A), and a solvent (10% aqueous solution of polyvinyl alcohol) were dried and then formed on the light absorbing layer 3 to have a thickness of 5 μm. The dye and the developer used for the first thermosensitive coloring layer 4 and the second thermosensitive coloring layer 6 are sufficiently dispersed in a sand middle to form a coating material having an average particle size of 0.3 μm, and the visible light and near The transmittance of infrared light was minimized.

Further, the protective layer 7 for improving the weather resistance is formed of an ultraviolet curable resin (urethane acrylate) to form a second protective layer.
Was formed on the thermosensitive coloring layer 6. When writing was performed on the information recording medium produced as described above by irradiating a semiconductor laser beam having a wavelength of 780 nm, it was possible to perform color printing only on the first thermosensitive coloring layer 4. On the other hand, when writing is performed using a thermal head, black color printing can be performed on the second heat-sensitive coloring layer 6, and the first heat-sensitive coloring layer 4 can be formed by coloring the second heat-sensitive coloring layer 6. Could be concealed.

[0034]

Example 2 A 188 μm thick polyethylene terephthalate film (E-20 manufactured by Toray Industries, Inc.) was used as the substrate 2, and the light-absorbing thermosensitive coloring layer 8 was formed on one surface of the substrate 2 by gravure printing. An information recording medium 1B was manufactured by laminating the heat insulating intermediate layer 5, the heat-sensitive coloring layer 9, and the protective layer 7 in this order. Here, a fluorene-based leuco dye (3,6,6-tris (dimethylamino) spiro (fluorene-9,3-phthalide)), a developer (bisphenol A) and a solvent (A 10% aqueous solution of polyvinyl alcohol) was mixed with a near-infrared light absorbing substance (S110510, manufactured by ICI). The coating solution containing the near-infrared light absorbing agent thus formed was dried, and then formed on a substrate to a thickness of 5 μm.

The thermosensitive coloring layer 9 is made of a leuco dye (3-
(N-ethyl-N acylamino) -6-methyl-7-anilinofluoran), a developer (bisphenol A),
A mixture of a solvent (10% aqueous solution of polyvinyl alcohol) was dried and then formed on the intermediate layer so as to have a thickness of 5 μm. The dye and the developer used for the light-absorbing thermosensitive coloring layer 8 and the thermosensitive coloring layer 9 are sufficiently dispersed with a sand middle,
A coating was formed so as to have an average particle size of 0.3 μm so that the transmittance of visible light and near-infrared light was not hindered as much as possible. The heat-insulating intermediate layer 5 and the protective layer 7 were formed in the same manner as in Example 1.

The information recording medium 1 produced as described above
B was irradiated with a semiconductor laser beam having a wavelength of 780 nm to write a barcode. As a result, color printing was possible only with the light-absorbing thermosensitive coloring layer 8. On the other hand, when a solid black color was formed on the entire surface of the heat-sensitive coloring layer 9 by the thermal head, the display of the barcode on the light-absorbing heat-sensitive coloring layer 8 was hidden invisibly. Then, when trying to read the barcode using the infrared barcode reader, it was possible to read the hidden barcode data.

[0037]

As described in detail above, the information recording medium of the present invention is capable of performing a contact-type writing / display recording using a thermal head or the like and a non-contact-type writing / display recording performed by irradiating a laser beam. Because it can be done in combination,
The use of the information recording medium can be expanded, which is convenient. In addition, information such as a machine-readable code can be easily processed into a concealed state, so that the security of the information can be ensured. Further, since the concealed information can be read mechanically, the information can be efficiently obtained. Can be read and the authenticity can be determined.

[Brief description of the drawings]

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

FIG. 2 is a sectional view of a second embodiment of the information recording medium according to the present invention.

FIG. 3 is a diagram illustrating a state where display recording is performed on a first thermosensitive coloring layer by irradiating a laser to the information recording medium of the first embodiment.

FIG. 4 is a diagram showing a state in which a thermal head is in contact with the information recording medium of the first embodiment to perform display recording on a second thermosensitive coloring layer.

FIG. 5 is a diagram illustrating a state in which display recording is performed on a plurality of portions of a first thermosensitive coloring layer by irradiating the information recording medium of the first embodiment with a laser.

FIG. 6 is a diagram illustrating a state in which a thermal head is caused to travel while being in contact with the information recording medium of the first embodiment, and a second thermosensitive coloring layer is colored.

FIG. 7 shows a state in which, in the information recording medium of the first embodiment, the display record of the first thermosensitive coloring layer is concealed by the second thermosensitive coloring layer which is colored, and the display record is read by an infrared reader. FIG.

FIG. 8 is a diagram illustrating a state in which display recording is performed on a light-absorbing thermosensitive coloring layer by irradiating a laser to the information recording medium of the second embodiment.

FIG. 9 is a diagram illustrating a state in which a thermal head is caused to travel while being in contact with the information recording medium of the second embodiment to perform display recording on a thermosensitive coloring layer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1A, 1B Information recording medium 2 Substrate 3 Light absorption layer 4 First thermosensitive coloring layer 5 Heat insulating intermediate layer 6 Second thermosensitive coloring layer 7 Protective layer 8 Light absorbing thermosensitive coloring layer 9 Thermosensitive coloring layer 10 Laser light source 11 Laser light 12 Objective lens 13 Thermal head 14 Barcode 15 Coloring part 16 Infrared barcode reader 17 Near infrared

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C005 HA13 HB01 JA25 JC02 JC05 KA25 KA45 LB07 LB08 2H026 AA07 AA13 AA24 AA28 BB01 DD01 DD45 DD46 DD53 DD57 FF07 FF13 FF22

Claims (6)

[Claims] 1. A base, a light absorbing layer formed on at least one side of the base, a first thermosensitive coloring layer formed on the light absorbing layer, and a first thermosensitive coloring layer formed on the light absorbing layer. An information recording medium comprising: a heat-insulating intermediate layer formed thereon; and a second thermosensitive coloring layer formed on the heat-insulating intermediate layer. 2. The information recording medium according to claim 1, wherein the first thermosensitive coloring layer contains a dye having absorption in a near infrared region. 3. A substrate, a light-absorbing thermosensitive coloring layer formed on at least one side of the substrate, a heat-insulating intermediate layer formed on the light-absorbing thermosensitive coloring layer, and the heat-insulating intermediate layer. An information recording medium comprising: a thermosensitive coloring layer formed on the layer. 4. The information recording medium according to claim 3, wherein the light-absorbing thermosensitive coloring layer contains a dye having absorption in a near infrared region. 5. A substrate, a light-absorbing layer formed on at least one side of the substrate, a first thermosensitive coloring layer formed on the light absorbing layer, and a first thermosensitive coloring layer formed on the first thermosensitive coloring layer. A recording method for an information recording medium for performing display recording on an information recording medium comprising: a heat insulating intermediate layer formed thereon; and a second thermosensitive coloring layer formed on the heat insulating intermediate layer. When performing display recording on the first thermosensitive coloring layer of the information recording medium, the display recording is performed by irradiating a laser beam from above the information recording medium, and when performing display recording on the second thermosensitive coloring layer. Is a method for recording on an information recording medium, which is performed by contacting a thermal head on the information recording medium. 6. A substrate, a light-absorbing heat-sensitive coloring layer formed on at least one side of the substrate, a heat-insulating intermediate layer formed on the light-absorbing heat-sensitive coloring layer, and the heat-insulating intermediate layer. A thermosensitive coloring layer formed on the layer, and a recording method of an information recording medium for performing display recording on an information recording medium comprising: a display recording on the light-absorbing thermosensitive coloring layer of the information recording medium. In the case where the recording is performed, the recording is performed by irradiating a laser beam from above the information recording medium, and in the case where display recording is performed on the thermosensitive coloring layer, the recording is performed by contacting a thermal head on the information recording medium. Recording method.