JPH07117362A - Reversible thermosensitive recording medium and magnetic card using the same - Google Patents

Abstract

PURPOSE:To improve the close adhesiveness of a reversible thermal recording layer an overcoat layer and to prevent the deterioration of appearance and the erosion of a lower layer caused by repeated recording by arranging an intermediate layer based on ultraviolet or electron crosslinkable resin between both layers. CONSTITUTION:A magnetic card member (base material) 6 is formed by arranging a magnetic recording layer 2 on the upper surface of a card member 1. A thermal recording layer 3 capable of reversibly recording and erasing data is arranged on the upper surface of the magnetic recording layer 2 and consists of a resin matrix and the org. monomeric substance dispersed therein. In this case, an overcoat layer 5 is arranged on the upper surface of the thermal recording layer 3 through an intermediate layer 4 based on an ultraviolet or electron crosslinkable resin. The ultraviolet or electron crosslinkable resin contains an oligomer (A) and a di(meth) acrylate monomer (B) containing a 4-10C long chain alkylene group in one molecule thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reversible thermosensitive recording medium capable of reversibly repeatedly forming and erasing an image based on a temperature change. Further, the reversible thermosensitive recording medium of the present invention is used as a magnetic card.

[0002]

2. Description of the Related Art In recent years, the use of thermal recording media has expanded rapidly with the spread of thermal heads. Particularly in prepaid cards, which are rapidly becoming popular in the fields of communication, transportation, distribution, etc., magnetic information is often displayed on the card as visible information. Such magnetic cards are widely used as highway cards, JR orange cards, prepaid cards for department stores, supermarkets, and the like. However, the area where visible information can be displayed on such a magnetic card is limited, and in the case of a high-priced prepaid card, if the balance of the prepaid card is added, the information may not be displayed.
In such a case, a new card is usually reissued to deal with the problem, and there is a problem that the cost becomes high.

In order to solve such a problem, it is preferable to use a reversible recording material capable of recording / erasing a plurality of times in the same area. With such materials, old information can be erased and new information can be displayed.
There is no need to reissue a new card because it cannot be displayed.

Conventionally, as a heat-sensitive recording material capable of reversibly recording and erasing information, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, polyester,
It has been proposed to have a heat-sensitive recording layer in which an organic low-molecular substance such as higher alcohol or higher fatty acid is dispersed in a resin base material such as polyamide (JP-A-54-119377,
JP-A-55-154198 and JP-A-2-1363
Etc.).

The formation and deletion of images with such materials is
It utilizes the reversible change in transparency of the thermosensitive recording layer depending on the temperature. That is, this recording material has a certain temperature (t ₁
.About.t ₁ ′) shows a transparent state (where t ₁ <t ₁ ′), and a temperature (t ₁ ′) or higher shows a cloudy state. When the recording layer is provided on the magnetic card, a thermal head is particularly preferable for heating the recording layer. In other words, make the initial state transparent,
By applying a temperature of (t ₁ ′) or higher with a thermal head, the portion becomes cloudy and characters and patterns are recorded. In addition, the initial state is set to be cloudy and the thermal head (t ₁
It is also possible to make the portion transparent by applying a temperature of up to t ₁ ′) for recording. In the case of erasing, in the former case (t ₁ ~
t ₁ '), the latter (t _1') may be added to or higher.

[0006]

However, when printing is repeatedly performed at the same location on such a heat-sensitive recording layer using a thermal head or the like, the heat-sensitive recording layer is deformed by heat and pressure of the thermal head, and the clouding is completely suppressed. And the printability also deteriorates. In order to solve such a problem, an overcoat layer is provided on the heat sensitive recording layer, but the heat sensitive recording layer and the overcoat layer are peeled off when severe heat and pressure stress are repeatedly applied to the same place. . For this reason, it has been proposed to provide an intermediate layer for improving the adhesiveness between the thermal recording layer and the overcoat layer, but even such a thermal recording medium still suffers from severe stress in printing. The thing which can withstand is not obtained.

An object of the present invention is to have excellent durability against stress during printing, excellent solvent resistance in forming the overcoat layer, and excellent reversibility exhibiting good appearance and printability. It is to provide a heat-sensitive recording medium.

[0008]

As a result of various studies to solve the above-mentioned problems, the present inventors have found that an ultraviolet-crosslinking type or electron beam crosslinking is used as an intermediate layer provided between the heat-sensitive layer and the overcoat layer. The present invention has been completed based on the finding that excellent adhesiveness can be obtained by using the resin layer of the mold.

The present invention is a reversible thermosensitive recording medium having a reversible thermosensitive recording layer containing a resin base material and an organic low molecule and an overcoat layer, wherein an ultraviolet ray is present between the reversible thermosensitive recording layer and the overcoat layer. The present invention provides a reversible thermosensitive recording medium comprising an intermediate layer containing a crosslinkable or electron beam crosslinkable resin as a main component.

Information can be recorded and erased repeatedly on the heat-sensitive recording layer of the recording material of the present invention, and visual recording can be performed on the heat-sensitive recording layer by using a heating recording device such as a thermal head. . In addition, it is possible to easily rewrite and rewrite information and update information by using the same device.

In the reversible thermosensitive recording medium of the present invention, it is particularly preferable to use a magnetic card member having a magnetic recording layer on the surface as a base material. In this case, the reversible thermosensitive recording layer may be provided either on the magnetic layer on the surface of the substrate or on the opposite surface. Further, it may be provided on the entire surface of the base material or a part thereof.

Next, the reversible thermosensitive recording material of the present invention will be specifically described with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing a specific example of a heat-sensitive recording material in which a reversible heat-sensitive recording layer is provided on a substrate having a magnetic recording layer coated on the surface. In FIG.
A magnetic recording layer 2 is provided on one surface of the card member 1, and a magnetic card member (base material) 6 is formed. On the magnetic recording layer 2, a heat sensitive recording layer 3 capable of reversibly recording and erasing information is provided. The heat-sensitive recording layer 3 contains a resin base material and an organic low molecular weight substance dispersed therein. An overcoat layer 5 is provided on the thermosensitive recording layer 3 with an intermediate layer 4 interposed therebetween.

The resin base material used in the reversible thermosensitive recording layer of the recording material of the present invention forms a layer in which organic low molecular weight substances are uniformly dispersed and held, and greatly affects the transparency at maximum transparency.
Therefore, the resin base material is preferably a resin having good transparency, mechanical stability, and good film-forming property. For example, polyvinyl chloride, vinyl chloride-vinyl acetate copolymers, vinyl chloride-vinyl acetate-vinyl alcohol copolymers, vinyl chloride-acrylate copolymers and other vinyl chloride-based copolymers; polyvinylidene chloride, vinylidene chloride- Vinyl chloride copolymer,
Vinylidene chloride-acrylonitrile copolymers and other vinylidene chloride copolymers; Polyester, polyamide, polyvinyl formal, polyvinyl butyral and other polyvinyl acetal resins, acrylic resins such as polyacrylates, polymethacrylates and acrylate-methacrylate copolymers; silicones Examples thereof include resins, polystyrene, styrene-butadiene copolymer, polyarylate, polycarbonate, polysulfone, aromatic polyamide, phenoxy type resins, thermoplastic resins such as cellulosic resins, and other thermosetting resins. These base material resins may be used alone or in combination of two or more.

Further, as the organic low molecular weight substance to be blended in the heat-sensitive recording layer, at least one higher fatty acid, particularly at least one higher fatty acid having 16 or more carbon atoms is used. Specific examples of the higher fatty acid having 16 or more carbon atoms include palmitic acid, margaric acid, stearic acid, nonadecanoic acid, eicosanoic acid, heneicosanoic acid, behenic acid, lignoceric acid, pentacosanoic acid, cerotic acid, heptacosanoic acid, montanic acid, Triacontanoic acid, nonacosanoic acid, mericinic acid, 2-heptadecenoic acid, 2-hexadecenoic acid, trans-3-hexadecenoic acid, trans-2-octadecenoic acid, cis-2-octadecanoic acid, trans-4-octadecenoic acid, cis -6-octadecenoic acid, elaidic acid, vacenic acid, trans-gondoic acid, erucic acid,
Brassic acid, ceracoleic acid, trans-ceracoleic acid, trans-8, trans-10-octadecadienoic acid, linoelaidic acid, α-eleostearic acid, β
-Eleostearic acid, pseudoeleostearic acid,
12,20-heneicosadienoic acid and the like can be mentioned. You may use these individually or in mixture of 2 or more types.

As the organic low molecular weight substance, the above-mentioned higher fatty acid may be further represented by the general formula: HOOC (CH ₂ ) _m —S— (CH ₂ ) _n C.
OOH [in the formula, m and n are each independently an integer of 1 to 5]
It is preferable to use a mixture of sulfides represented by
By combining this sulfide with a higher fatty acid having 16 or more carbon atoms, it is possible to shift the clearing temperature region to the high temperature side and expand the region width. Specific examples of the sulfide include (1,1′-dicarboxy) dimethyl sulfide,
(2,2'-dicarboxy) diethyl sulfide [thiodipropionic acid], (3,3'-dicarboxy) dipropyl sulfide, (1,2'-dicarboxy) methylethyl sulfide, (1,3'- Dicarboxy) methylpropyl sulfide, (1,4′-dicarboxy) methylbutyl sulfide, (2,3′-dicarboxy) ethylpropyl sulfide, (2,4′-dicarboxy) ethylbutyl sulfide, (5,5 Examples include ′ -dicarboxy) dipentyl sulfide, and thiodipropionic acid is particularly preferable. You may use these individually or in mixture of 2 or more types.

The mixing ratio of the higher fatty acid and sulfide such as thiodipropionic acid is 90:10 to 1 by weight.
It is 0:90, preferably 90:10 to 30:70.
When the amount of sulfide is less than the above range, the transparent temperature range is not sufficiently widened, while when it is more than the above range, the contrast is lowered.

The mixing ratio of the organic low molecular weight substance and the resin base material in the thermosensitive recording layer is preferably about 50 to 1600 parts by weight of the resin base material with respect to 100 parts by weight of the organic low molecular weight substance.
100 to 500 parts by weight are particularly preferred. When the blending amount of the base material is less than 50 parts by weight, it becomes difficult to form a film in which the organic low molecular weight substance is stably retained in the base material. On the other hand, when the amount of the base material exceeds 1600 parts by weight, the amount of the organic low-molecular substance that becomes cloudy is small, so that the written recorded information cannot be clearly read, which is not preferable as a recording material.
In addition, the organic low-molecular substance is uniformly dispersed in the base material,
Moreover, it is preferable that they are sufficiently fixed, and they may be partially compatible with the base material.

In the reversible thermosensitive recording layer, various additives such as a lubricant, an antistatic agent, a plasticizer, a dispersant, a stabilizer, a surfactant, and an inorganic or organic filler may be added, if necessary. You may.

The solvent used for forming the heat-sensitive recording layer may be variously selected depending on the types of the base material and the organic low molecular weight substance, and examples thereof include tetrahydrofuran, methyl ethyl ketone, methyl isobutyl ketone, chloroform, carbon tetrachloride, ethanol, toluene, Examples thereof include benzene.
In the thermosensitive recording layer obtained not only when the dispersion is used but also when the solution is used, the organic low molecular weight substance is precipitated as fine particles and exists in a dispersed state.

The thickness of the heat-sensitive recording layer varies depending on the application, but is generally preferably 1 to 20 μm. If the thickness of the heat-sensitive recording layer is thicker than this, heat from a thermal head or the like is less likely to be transferred, and if it is less than 1 μm, contrast (white turbidity) is lowered, which is not preferable. Note that there is no such limitation when a heating method other than the thermal head is used.

The intermediate layer provided on the heat-sensitive recording layer contains an ultraviolet-crosslinking type or electron-beam crosslinking type resin as a main component.
Examples of the oligomer used for forming the ultraviolet or electron beam cross-linking type resin include urethane-based acrylates, epoxy-based acrylates, polyester-based acrylates, polybutadiene-based acrylates, melamine-based acrylates, and the like.
No. 00 is used. Among these oligomers, polyester acrylate is particularly preferable from the viewpoint of adhesion to the overcoat layer. These oligomers may be used alone or in combination of two or more.

On the other hand, as the monomer, di (meth) acrylate containing a long-chain alkylene group having 4 to 10 carbon atoms in one molecule is used. Specific examples include ethylene glycol di (meth) acrylate, diethylene glycol, cold di (meth) acrylate, triethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, tetrapropylene. Glycol di (meth) acrylate, 1,4-butanediol di (meth)
Acrylate, di (tetramethylene glycol) di (meth) acrylate, 1,5-pentanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, 3-methyl-1,5-pentanediol di ( There are (meth) acrylate, 1,9-nonanediol di (meth) acrylate, 1,9-decanediol di (meth) acrylate, or isomers thereof. These monomers may be used alone, or 2
You may use it in combination of 2 or more types. Among these monomers, 1,9-nonanediol diacrylate is particularly preferable in terms of repeatability and adhesion to the reversible thermosensitive recording layer.

The weight ratio of the oligomer (A) and the monomer (B) is (A) / (B) 90/10 to 10/90, particularly preferably (A) / (B) 40. / 60 to 20/80. When the blending ratio of the oligomer (A) exceeds 90 parts by weight, the adhesiveness with the reversible thermosensitive recording material layer is deteriorated and the appearance is apt to deteriorate when repeatedly printed and erased. Further, if the mixing ratio of the monomer (B) exceeds 90 parts by weight, the curability is deteriorated, which is not preferable.

Further, as a photopolymerization initiator used for ultraviolet crosslinking, benzyl methyl ketal, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1- {4
-(Methylthio) phenyl} -2-morpholinopropanone-1, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropan-1-one, 2-hydroxy-2-methyl-1-phenyl-propane -1-one, 1- (4-dodecylphenyl) -2-hydroxy-
Known compounds such as 2-methylpropan-1-one are used.

If desired, the intermediate layer may contain additives such as antistatic agents, stabilizers, surfactants and antioxidants, or other resins.

The thickness of the intermediate layer is usually 0.05 to 5
μm, preferably 0.1 to 3 μm. If the film thickness is thinner than this, not only will sufficient adhesion with the heat-sensitive layer or overcoat layer not be obtained, but recording will also be repeated at the same location.
The print density (white turbidity) when erased decreases. On the other hand, if it is thicker than this, the thermal conductivity to the reversible thermosensitive recording material layer decreases, and both are not preferable.

An overcoat layer is provided on the intermediate layer. The reversible thermosensitive recording layer is deformed by heat and pressure of a heating device such as a thermal head during recording and erasing, and the appearance of the thermosensitive layer is remarkably deteriorated by repeatedly printing at the same location. An overcoat layer is provided on the heat-sensitive layer in order to prevent such deformation, deterioration, dent marks during erasing, sticking during recording, and to endure recycling. Examples of such an overcoat layer include organic materials such as silicone-based, acrylic-based, fluorine-based, epoxy-based, urethane-based, or SiO ₂ , Si.
O, MgO, ZnO, TiO ₂ , Al ₂ O ₃ , AlN, Ta ₂ O ₅
You may use inorganic substances, such as. Further, a thermosetting resin, an electron beam curable resin, or an ultraviolet curable resin may be used as the overcoat layer.

Such an overcoat layer can be formed by a conventionally known coating method or a vacuum vapor deposition method. In the case of an organic substance, the thickness is 0.01 to 10 μm, preferably 0.1 to 5 μm. . If the thickness is smaller than this, the effect of overcoating is small, while if it is larger than this, the heat conductivity during recording and erasing is deteriorated, which is both undesirable.

To form a heat-sensitive recording layer using each of the above components, generally, a solution in which two components of a resin base material and an organic low molecular weight substance are dissolved is prepared, or at least one of the organic low molecular weight substances is prepared. A solution of the resin base material is prepared using a solvent that does not dissolve the above, the organic low molecular weight substance is dispersed in the form of fine particles, and a dispersion liquid in which a high boiling point solvent is dissolved is prepared. These preparations may be directly coated on the magnetic layer surface of the magnetic card member or on the opposite side thereof, and may be a plastic,
It may be applied on a substrate such as a glass plate, a metal plate, paper or cloth, dried to form a heat-sensitive recording layer, and then adhered onto a substrate such as a magnetic card member.

Next, a solvent-free or solvent that does not attack the heat-sensitive layer, for example, ultraviolet or electron beam curable resin diluted with methanol, ethanol, isopropyl alcohol, hexane, toluene, heptane, xylene, etc. is applied,
This is irradiated with ultraviolet rays or electron beams to be cured to form an intermediate layer.

Further, on this, an overcoat resin,
An inorganic material is applied or vapor-deposited to form an overcoat layer. If necessary, another resin layer may be provided between the heat sensitive layer and the intermediate layer.

The reversible thermosensitive recording material of the present invention is preferably used for a magnetic card. In this case, the reversible thermosensitive recording material layer may be provided either on the magnetic layer of the card or on the opposite surface. Further, it may be provided on the entire surface of the card or a part thereof. In providing the material of the present invention on such a magnetic card, an undercoat layer may be interposed, if necessary, in order to improve the adhesion to the substrate.
Further, in order to improve the visibility, a colored layer or a metal reflective layer of Al, Ag, Sn or the like may be provided under the reversible thermosensitive recording layer.

The magnetic card having such a reversible heat-sensitive recording layer can be widely used as highway cards, JR orange cards, various prepaid cards used in department stores, supermarkets and the like, and stored fair cards.

[0034]

EXAMPLES Next, the present invention will be described more specifically based on examples. In the following, “parts” means parts by weight.

Example 1 Behenic acid 7 parts Thiodipropionic acid 3 parts Vinyl chloride-vinyl acetate copolymer (UCC; VYHH) 25 parts 1,3-pentadiene polymer 2 parts Tetrahydrofuran 120 parts The solution was applied on a polyethylene vapor deposited polyethylene terephthalate film (188 μm thick) using a wire bar so that the dry film thickness was 5 μm, to obtain a reversible thermosensitive recording material layer. Next, an intermediate layer was coated with the following composition so as to have a film thickness of 1 μm, and an ultraviolet ray of 500 mJ / c was applied.
Curing was performed by irradiating m ² .

Oligoester acrylate 50 parts (Toagosei Co., Ltd .; Aronix M-6100) 1,6-hexanediol diacrylate 50 parts Benzyl dimethyl ketal 2 parts (Nippon Ciba Geigy; Irgacure 651) Further acrylic as an overcoat layer 50 parts of UV curable resin (BR-370 manufactured by Asahi Denka Co., Ltd.), methanol 5
A coating solution consisting of 0 parts was coated so as to have a dry thickness of 1 μm, and cured by irradiating with ultraviolet rays of 500 mJ / cm ² .

[Example 2] The following composition was used for the intermediate layer,
Example 1 except that ultraviolet rays of 500 mJ / cm ² were applied.
A thermosensitive recording medium was prepared in the same manner as.

Oligoester acrylate 50 parts (Toagosei Co., Ltd .; Aronix M-6100) Lauryl acrylate 50 parts 1-hydroxycyclohexyl phenyl ketone 2 parts (Nippon Ciba Geigy; Irgacure 184)

[Example 3] A thermosensitive recording medium was prepared in the same manner as in Example 1 except that the following composition was used for the intermediate layer and the electron beam was irradiated with 5 Mrad.

Orgoester acrylate (Aronix M-6500) 50 parts 1,6-hexanediol diacrylate 50 parts

Example 4 The following composition was used for the intermediate layer,
Example 1 except that ultraviolet rays of 500 mJ / cm ² were applied.
A thermosensitive recording medium was prepared in the same manner as.

Oligoester acrylate 30 parts (Toagosei Co., Ltd .; Aronix M-6100) 1,9-Nonanediol diacrylate 70 parts Benzyl dimethyl ketal 2 parts (Japan Ciba-Geigy; Irgacure 651)

[Comparative Example 1] A thermosensitive recording medium was prepared in the same manner as in Example 1 except that the intermediate layer was not provided.

[Comparative Example 2] A solution having the following composition was dried to a film thickness of 1
A thermosensitive recording medium was prepared in the same manner as in Example 1 except that an intermediate layer was formed by coating and drying so that the thickness became μm.

Vinyl acetate resin (polymerization degree 500) 10 parts Methanol 90 parts

[Comparative Example 3] A solution having the following composition was dried to a film thickness of 1
A thermosensitive recording medium was prepared in the same manner as in Example 1 except that an intermediate layer was formed by coating and drying so that the thickness became μm.

Oligoester acrylate 95 parts (Toagosei Co., Ltd .; Aronix M-6100) 1,9-Nonanediol diacrylate 5 parts Benzyl dimethyl ketal 2 parts (Nippon Ciba Geigy; Irgacure 651)

[Comparative Example 4] A solution having the following composition was dried to a film thickness of 1
A thermosensitive recording medium was prepared in the same manner as in Example 1 except that an intermediate layer was formed by coating and drying so that the thickness became μm.

Oligoester acrylate 5 parts (Toagosei Co., Ltd .; Aronix M-6100) 1,9-Nonanediol diacrylate 95 parts Benzyl dimethyl ketal 2 parts (Nippon Ciba Geigy; Irgacure 651) Examples 1 to 4 and Comparative A thermal head (8 dot / m) was placed at the same location on each of the thermal recording media obtained in Examples 1 to 4.
m, line head) to repeat printing and erasing to examine the printability, erasability and appearance. The results are shown in Table 1. The print and erase densities are measured by an optical reflection densitometer (Macbeth RD-
920).

[Table 1] ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Initial 100 times after repeating ── ───────────────────────── Print density Erase density Print density Erase density ━━━━━━━━━━━━━━━━━ ━━━━━━━━━━━━━━━━━━━ Embodiment 1 0.53 1.52 0.55 1.50 〃 2 0.50 1.48 0.53 1.51 〃 3 0.51 1.45 0.55 1.49 〃 4 0.51 1.50 0.53 1.51 ───────────────────────── ─────────── Comparative Example 1 0.48 1.51 1.02 1.34 〃 2 0.49 1.49 0.52 1.42 〃 3 0.50 1.47 0. 43 1.32 〃 4 0.55 1.48 − − ━━━━━━━━━━━━━━━━━━━━━━━ ━━━━━━━━━━━━━━━

As described above, in Examples 1, 2 and 3, both the printing and erasing densities hardly changed before and after the repetition, and no deterioration of the appearance such as scratches was observed. In particular, in Example 4, almost no characteristic deterioration was observed even after repeating 200 times. On the other hand, in Comparative Example 1, the print density was extremely lowered, and scratches and peeling of the overcoat were remarkably observed. Further, in Comparative Example 2, almost no decrease in print density was observed, but the background was unevenly turbid and scratches were observed in the print area. In Comparative Example 3, after the repetition, voids were generated between the overcoat and the heat-sensitive layer, and the printed / erased portions were nonuniformly turbid. Further, in Comparative Example 4, the intermediate layer was not completely cured, the appearance was extremely deteriorated, and the measurement after repeating 100 times became impossible.

[0052]

INDUSTRIAL APPLICABILITY The reversible thermosensitive recording material of the present invention has excellent adhesion between the recording layer and the overcoat layer, the appearance does not deteriorate even after repeated recording, and the overcoat layer is formed. Sometimes the lower layer is not attacked.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a specific example of the reversible thermosensitive recording material of the present invention.

[Explanation of symbols]

 1 card member 2 magnetic recording layer 3 thermosensitive recording layer 4 intermediate layer 5 overcoat layer 6 magnetic card member

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical display location // B41M 5/26 G06K 19/00 C 6956-2H B41M 5/18 101 A (72) Inventor Masaaki Kishimoto 3-43-1 Minami Kishibe, Suita City, Osaka Prefecture Dainippon Ink & Chemicals, Inc.

Claims (4)

[Claims] 1. A reversible thermosensitive recording medium having a reversible thermosensitive recording layer containing a resin base material and an organic low molecule and an overcoat layer, wherein ultraviolet crosslinking is carried out between the reversible thermosensitive recording layer and the overcoat layer. A reversible thermosensitive recording medium, characterized in that an intermediate layer containing, as a main component, a thermosetting or electron beam crosslinkable resin is provided. 2. An ultraviolet crosslinkable or electron beam crosslinkable resin is a di (meth) acrylate monomer containing (A) an oligomer and (B) a long-chain alkylene group having 4 to 10 carbon atoms in one molecule. The reversible thermosensitive recording medium according to claim 1, comprising: 3. A magnetic card in which the reversible thermosensitive recording medium according to claim 1 is provided on a magnetic card member. 4. The magnetic card according to claim 3, wherein the reversible thermosensitive recording medium is provided on the magnetic recording layer side or a part or the whole surface on the opposite side of the magnetic recording layer.