JP2002059679A - Card with thermal printing function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a card which records and displays information verifying the identity of a card holder in such a state that the card cannot be rewritten when the recording/display of such information is desired or under compulsory measures, regarding the card not specifying the identification. SOLUTION: This card with a thermal printing function comprises an information recording part and a heat-sensitive recording material with a thermal color development layer composed mainly of a leuco dye, a developer and a sensitizing agent formed on the surface and a thermal variable transparency recording layer which is composed mainly of a rein matrix and an organic low-molecular substance dispersed in the resin matrix and indicates a reversibly changing transparency depending upon temperature and is rewritable, formed on the back.

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 having both a thermosensitive recording display section and a rewritable thermosensitive recording display section. The present invention relates to an information recording medium in which an erasable thermosensitive recording display is formed on the back surface or the two displays are formed on the same surface.

[0002]

2. Description of the Related Art An information recording medium, for example, a prepaid card (stored fair card) of a train or a point card of a store, is provided with a thermal recording unit using a thermal head in addition to a magnetic recording unit. In the case of the prepaid card for the train, the heat-sensitive recording unit employs a write-once format and keeps a record until the purchased amount runs out. The point card issued by the store has a thermal recording material which can be rewritten by a thermal head formed on the card surface, and indicates the number of points for a recently purchased amount and the total number of points for the year. The telephone card is configured so that the remaining number can be determined by punching the vicinity of the number displayed by printing. In addition, there is a device in which magnetic powder is confined in a narrow space and the magnetic layer on the back surface is magnetized in a pattern so that information can be seen.
Further, there is a type in which a flat magnetic material is encapsulated together with oil in a capsule, and the magnetic material is oriented in a pattern by a magnet from the outside so that information can be viewed as information by its contrast. Which method is selected depends on the contents of the information medium to be used. For example, in the case of a telephone card represented by a punched hole, since it is stored for a long time by the collector, it is judged that the method using thermal coloring or a magnetic capsule is not appropriate, and conversely, it is not a target of the collector, It has been determined that, for a prepaid card for a train, which is used in a short period of time, the finer the display, the better the thermosensitive coloring method is.

[0003] As described above, telephone cards, prepaid cards for trains, and the like do not need to strictly identify the person who owns the card, and thus the name of the holder is not displayed on the card in many cases. Therefore, for example, if the person who bought the card first loses the card with the remaining amount remaining, even if the person who picked it up uses it as it is, it is of course impossible to judge that the owner is different on the device side, It is difficult for a person who has lost a card to claim his or her own unless they have a special mark.

[0004]

Therefore, according to the present invention, if the card which has not specified the principal as described above is requested or forcibly, information for certifying the principal is provided.
It is an object of the present invention to provide an information recording medium (card) which can be recorded and displayed on a card in a state where it cannot be rewritten.

[0005]

According to a first aspect of the present invention, there is provided an information recording medium comprising: an information recording portion; and a thermosensitive coloring layer containing a leuco dye, a color developer, and a sensitizer as main components. A rewritable heat sensitive material whose main component is a resin base material and an organic low-molecular substance dispersed in the resin base material, and whose transparency reversibly changes depending on temperature. The variable transparency recording layer is formed on the back surface.

In a second aspect based on the first aspect, the information recording section is a magnetic recording section.

In a third aspect based on the first aspect, the information recording section is an IC module.

According to a fourth aspect, in the first aspect, the information recording section is a magnetic recording section and an IC module.

According to a fifth aspect of the present invention, there is provided the thermosensitive recording material according to any one of the first to fourth aspects, further comprising a thermosensitive coloring layer having a leuco dye, a color developer, and a sensitizer as main components. A rewritable heat-sensitive variable transparency recording layer whose main component is a resin base material and an organic low-molecular substance dispersed in the resin base material, and whose transparency reversibly changes depending on temperature, has a same surface. It is characterized by being formed in.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a card with a thermal printing function of the present invention will be described below with reference to the drawings.

FIG. 1 is a front plan view for explaining a front surface of an information medium having both a thermosensitive recording display section of the present invention and a rewritable thermosensitive recording display section. FIG. 2 is a rear plan view of FIG. FIG. 4 is a diagram for explaining an information medium in which a thermosensitive recording display unit and a rewritable thermosensitive recording display unit are formed on the same surface, FIG. 4 is a cross-sectional view taken along line AA of FIG. 2, and FIG.
FIG. 6 is an enlarged view of the rewritable thermosensitive recording layer 3 of FIG. 4, and FIG. 7 is an enlarged view of the thermosensitive rewrite material.
Diagram for explaining that transparency changes by heat,
FIG. 8 is a diagram for explaining a state of multiple imposition at the time of card printing, and FIG. 9 is a diagram for explaining an outline of a manufacturing process of a laminated card.

In FIG. 1, a stripe-shaped magnetic recording section 4 for recording information is provided on the surface of a base of a laminated card 1 used for a cash card, a credit card, or the like.
An IC module 5 having an IC chip is formed. Further, a thermosensitive recording display section 2 is formed so that character information is recorded on the same surface as the information recording surface by the thermal head of the present invention so that a person can visually observe the recorded contents. Further, a “member card”, a design as card information, and fixed information by printing including an arrow are printed as the pre-printing unit 6. The thermal record display section 2 is designed to print the personal information of the person who owns the card, and the thermal record display section 2 is made of a material which cannot be rewritten or erased. Credit cards and some cash cards often have visual information formed by characters and numbers having irregularities in this portion. Credit cards and the like often have a sign panel on the back of the card for signing the card holder.

The magnetic recording section 4 as an information recording section is provided on the back side of the card according to the international standard of ISO (International Organization for Standardization), but may be provided locally on the front side of the card. It is supposed to be. Also, IC
The module is also formed on the surface of the card according to the ISO standard, and is generally formed at the position of the IC module 5 in FIG. The magnetic recording section 4 is formed on the outermost surface of the card base as can be seen from the sectional view of FIG. This is a magnetic head, which is formed on the outermost surface so that recorded information can be read accurately. However, the stripe may be hidden (concealed) due to the design of the surface. In this case, the concealing material is made as thin as possible to reduce spacing loss and to prevent the reading of magnetic information from being hindered.
Usually, as the magnetic information, in the case of the local standard, 72-digit character information is recorded in one track on the stripe.

As described above, IC modules have international standards based on ISO, and are usually manufactured in accordance with the standards. The storage capacity of IC chips has been increasing at an impressive rate due to technological advances year by year.
With respect to the chip size employed in an IC card and capable of guaranteeing physical strength, the capacity of a so-called data area in which information can be written and erased as well as the program area of the IC chip has been dramatically increased. The IC card has a central processing unit (CPU) that uses a program area (ROM) to safely control the data in the storage unit, and a simple logic circuit without the CPU to secure the data in the storage unit. There are two types, depending on the application. IC cards are increasing in place of magnetic cards due to the simple structure of the device.

As shown in FIG. 2, a rewritable thermosensitive recording (hereinafter referred to as thermosensitive rewrite) material is formed on the back surface of FIG. 1, but the thermosensitive recording display unit 2 shown in FIG. 1 of the present invention. By using the rewrite display unit 3 with the magnetic card, the magnetic card and the IC card can be used more effectively. The card 1 is printed with fixed information 7 of the card in advance, for example, the name of the company's card, such as "ABC card", on the inside of a transparent sheet of the card. The matters to be agreed between the user and the card issuer are printed as fixed information. In the present embodiment, the heat-sensitive rewrite display unit 3 includes:
"This point is 70 points", "The next sale is May 6", and "Total 7
The message of "40 points" is displayed by thermal printing in a rewritable state and displayed.

FIG. 3 shows an example in which the two types of thermal printing materials of FIGS. 1 and 2 are collected on the front side of a card and can be recorded by the same thermal head. Normally, the information printed on the thermosensitive recording display section 2 in FIG. 1 does not need to be rewritten after the first recording, so that only the side shown in FIG. Although it is not formed, the case as shown in FIG. 3 is required when a space is required to use one side for another purpose, or when a material that dislikes heat and rubbing is formed on the card. appear.

In FIG. 4, the card 1 is a laminate of a plurality of plastic sheets, which will be described in detail with reference to FIG. 9, where fixed information 6 and 7 are printed between the transparent sheet 101 and the core sheet 104 by prior printing. Have been. A magnetic recording section 4 is formed on the lower side of FIG. 4, which is the front side, and a thermal recording display section 2 is further formed. A thermal rewritable display section 3 is formed on the upper side which is the back side. I have. FIG.
In the embodiment, the magnetic recording unit 4, the heat-sensitive recording display unit 2, and the heat-sensitive rewrite display unit 3 are on the same plane as the transparent sheet 101, but may not necessarily be on the same plane depending on the manufacturing method. In many cases, the processing sequence of the magnetic stripe is performed before the lamination. Therefore, if the temperature and the time for sufficiently softening the thermoplastic plastic to be laminated and the time are required, the same plane is formed as described above. If the heat-sensitive recording display section 2 is formed by a transfer method, the heat-sensitive recording display section 2 is transferred at a temperature lower than the coloring temperature.
Alternatively, it is necessary to adhere the entire base, in which case it is formed outside the surface of the transparent sheet 101. The heat-sensitive rewritable display section 3 can be processed before the laminating step depending on the clearing temperature and the opaque temperature, and is adhered from above the base together with the base film as shown in the figure, so that the whole is on the same plane as the transparent sheet. You can also. These heat-sensitive record display sections 2,
In addition, the thermal rewrite display unit 3 is the same as the surface of the transparent sheet 101 for printing with a flat thermal head, or
It must be outside the surface of the transparent sheet 101.

FIG. 5 is an enlarged view of the thermal recording section 2 of FIG.
A thermal recording material 22 is coated on a base 23 made of polyester or the like, and a protective layer 21 is coated thereon. here,
The thermosensitive recording material 22 will be described in detail. As the heat-sensitive recording material, a sensitizer having a melting point of 70 to 100 ° C is used. If the melting point of the sensitizer is lower than 70 ° C., there occurs a problem that background fog occurs in a normal thermal recording environment, and if it is higher than 100 ° C., high sensitivity cannot be achieved. Therefore, those having a melting point of 80 ° C to 90 ° C are preferable. Therefore, the ratio between the sensitizer and the developer is as follows. That is, the sensitizer is based on 100 parts by weight of the dye.
50 to 500 parts by weight is suitable, preferably 150 to 500 parts by weight.
300 parts by weight. If the amount is less than 50 parts by weight, the sensitivity decreases, and if it exceeds 500 parts by weight, the print density decreases.
The developer is used in an amount of 100 to 5 parts by weight based on 100 parts by weight of the dye.
00 parts by weight is suitable, preferably 150 to 200 parts by weight. If the amount is less than 100 parts by weight, the sensitivity decreases. If the amount exceeds 500 parts by weight, the print density decreases.

The sensitizer used herein has the ability to dissolve the dye and the color developer during hot melting, and has a melting point of 70.
Although it is a substance in the range of -100 ° C, meta-terphenyl is listed as one having particularly excellent sensitivity, cost, and storage stability. Meta-terphenyl has relatively high crystallinity,
When such a sensitizer is used, the effect is particularly remarkable. Specific examples of the sensitizer include meta-terphenyl (mp 86-89 ° C), parabenzylbiphenyl (mp 85-88 ° C), 1,2-bis (3,4-dimethyl). Phenyl) ethane (mp 89-91 ° C.), dibenzyl oxalate (mp 80-81 ° C.), dibenzyl terephthalate (mp 95-97 ° C.), P-toluenesulfonic acid phenyl ester ( mp 95-98
° C).

Next, the developer will be described. A substance that solidifies in an amorphous state when cooled from a molten state at a cooling rate of 3 ° C./sec or less, and is selected from various phenolic substances, fatty acids, aromatic carboxylic acids, and the like generally used in heat-sensitive recording materials. As a typical example,
4-hydroxy-4'-isopropoxydiphenyl sulfone, 4,4'-thiobis (6-tbutyl-3-methylphenol), bis (4-hydroxyphenyl) methyl acetate and the like are listed.

The leuco dyes used here are used alone or as a mixture of two or more kinds. As such leuco dyes, those applied to heat-sensitive recording materials are arbitrarily applied. Leuco compounds of dyes such as triphenylmethane, fluoran, phenothiazine, auramine, spiropyran and indolinophthalide are preferably used.

As specific examples of the above leuco dyes,
3-bis (p-dimethylaminophenyl) -phthalide,
3,3-bis (p-dimethylaminophenyl) -6-dimethylaminophthalide (also known as crystal violet lactone), 3,3-bis (p-dimethylaminophenyl) -6-diethylaminophthalide, 3,3-bis (P
-Dimethylaminophenyl) -6-chlorophthalide;
3,3-bis (p-dibutylaminophenyl) phthalide, 3-cyclohexylamino-6-chlorofluoran, 3-dimethylamino-5,7-dimethylfluoran, 3- (N, N-diethylamino) -5 Methyl-7
-(N, N-dibenzylamino) fluoran, benzoyl leucomethylene blue, 6'-chloro-8'-methoxy-benzoindolino-pyrrospirane, 6'-bromo-3'-methoxy-benzoindolino-pyrrospirane, 3- 2'-hydroxy-4'-dimethylaminophenyl) -3- (2'-methoxy-5'-chlorophenyl) phthalide, 3-2'-hydroxy-4'-dimethylaminophenyl) -3- (2'- Methoxy-5'-nitrophenyl) phthalide, 3-2'-hydroxy-4'-
Diethylaminophenyl) -3- (2'-methoxy-
5'-methylphenyl) phthalide, 3-2'-methoxy-4'-dimethylaminophenyl) -3- (2'-hydroxy-4'-chloro-5'-methylphenyl) phthalide, 3-morpholino-7- (N-propyl-trifluoromethylanilino) fluoran, 3-pyrrolidino-7-
Trifluoromethylanilinofluoran, 3-diethylamino-5-chloro-7- (N-benzyl-trifluoromethylanilino) fluoran, 3-diethylamino-
7-chlorofluorane, 3-diethylamino-7-methylfluoran, 3-diethylamino-7,8-benzfluoran, 3-diethylamino-6-methyl-7-chlorofluoran, 3- (N-p-tolyl -N-ethylamino) -6-methyl-7-anilinofluoran, 3-pyrrolidino-6-methyl-7-anilinofluoran, 2-
{N- (3'-trifluoromethylphenyl) amino}
-6-diethylaminofluoran, 2- {3,6-bis (diethylamino) -9-(-chloroanilino) xanthylbenzoic acid lactam}, 3-diethylamino-6-methyl-7- (m-trichloromethylanilino) fluoran 3-Diethylamino-7-(-chloroanilino) fluoran 3-dibutylamino-7-(-chloroanilino) fluoran 3-N-methyl-N-amylamino-6
-Methyl-7-anilinofluoran, 3-N-methyl-
N-cyclohexylamino-6-methyl-7-anilinofluoran, 3-diethylamino-6-methyl-7-anilinofluoran, 3-pyrrolidino-7- (di-p-chlorophenyl) methylaminofluoran, 3-diethylamino-5-chloro-7- (α-phenylethylamino) fluoran, 3- (N-ethyl-p-toluidino)
-7- (α-phenylethylamino) fluoran, 3-
Diethylamino-7-(-methoxycarbonylphenylamino) fluoran, 3-diethylamino-5-methyl-7- (α-phenylethylamino) fluoran, 3-
Diethylamino-7-piperidinofluoran, 2-chloro-3- (N-methyltoluidino) -7- (pn-butylanilino) fluoran, 3- (N-methyl-N-isopropylamino) -6-methyl- 7-anilinofluoran, 3-dibutylamino-6-methyl-7-anilinofluoran, 3,6-bis (dimethylamino) fluorenespiro (9,3 ')-6'-dimethylaminophthalide, 3 -(N-benzyl-N-cyclohexylamino)
-5,6-benzo-7-α-naphthylamino-4′-bromofluoran, 3-diethylamino-6-chloro-7
-Anilinofluoran, 3-N-ethyl-N- (2-ethoxypropyl) amino-6-methyl-7-anilinofluoran, 3-N-ethyl-N-tetrahydrofurfurylamino-6-methyl- 7-anilinofluoran, 3-
Diethylamino-6-methyl-7-mesitidino-4 ',
5'-benzofluoran, 3-N-methyl-N-isobutyl-6-methyl-7-anilinofluoran, 3-N-
Ethyl-N-isoamyl-6-methyl-7-anilinofluoran, 3-diethylamino-6-methyl-7-
(2 ', 4'-dimethylanilino) fluoran and the like.

If necessary, auxiliary additives commonly used in this type of heat-sensitive recording material, such as fillers, surfactants, lubricants, waxes and auxiliaries, can be used in combination.
In this case, as the filler, for example, calcium carbonate,
Silica, zinc oxide, titanium oxide, aluminum hydroxide,
Inorganic fine powders such as zinc hydroxide, barium sulfate, clay, talc, surface-treated calcium and silica, uric acid-formalin resin, styrene / methacrylic acid copolymer,
Organic fine powder such as polystyrene resin can be used.

Next, FIG. 6 is an enlarged view of the heat-sensitive rewritable recording section 3, in which a heat-sensitive rewritable recording material 32 is coated on a base 33 made of polyester or the like, and a protective layer 31 is coated thereon. Here, the thermal rewrite recording material 32 will be described in detail with reference to FIG.

The embodiments described here are examples in which an epoxy resin having excellent durability against repeated printing / erasing is used as a resin base material. When using an epoxy resin as a resin base material, it may be used in combination with a curing agent, or may not be used, but if a curing agent is not used, the resin used must have a high molecular weight and be solid at room temperature. Needless to say.

Examples of the epoxy resin used in this embodiment include bisphenol-based, novolak-based, alkylphenol-based, resorcin-based, polyglycol-based, ester-based, and non-glycidyl-based epoxy resins. Particularly preferred is bisphenol A. It is a type epoxy resin. Examples of the curing agent for the epoxy resin include amines such as aliphatic amines, aromatic primary amines, and tertiary amines;
Commonly known curing agents such as acid anhydrides and dibasic acids can be used.

The reversible thermosensitive recording materials utilize the change in transparency (transparent state, opaque opaque state) of these materials, and the difference between the transparent state and the opaque opaque state is presumed as follows. In other words, in the case of transparency, the particles of the organic low-molecular substance dispersed in the resin base material are composed of large particles of the organic low-molecular substance, and light incident from one side is transmitted to the other side without being scattered. In addition, in the case of cloudiness, the particles of the organic low-molecular substance are composed of polycrystals composed of fine crystals of the organic low-molecular substance, and the crystal axes of the individual crystals are oriented in various directions. Therefore, light incident from one side is refracted many times at the interface of the crystals of the organic low-molecular substance particles, and is scattered, so that it appears white,
Etc.

In FIG. 7, the heat-sensitive layer mainly composed of a resin base material and an organic low-molecular substance dispersed in the resin base material is in a cloudy and opaque state at room temperature of T0 or less, for example.
When this is heated to a temperature T2, it becomes transparent, and in this state, it is still transparent even if it is returned to room temperature below T0 again. This is presumably because the organic low-molecular substance grows from a polycrystal to a single crystal through a semi-molten state from the temperature T2 to T0 or lower. Further heating to a temperature above T3 results in a translucent state intermediate between the maximum transparency and the maximum opacity. Next, when the temperature is lowered, the state returns to the original cloudy and opaque state without taking the transparent state again. This is considered to be because the organic low-molecular-weight substance was melted at a temperature of T3 or higher, and then cooled to precipitate polycrystals. When this opaque state is heated to a temperature between T1 and T2 and then cooled to room temperature, that is, a temperature equal to or lower than T0, an intermediate state between transparent and opaque can be obtained. In addition, the material which has become transparent at the normal temperature is again heated to a temperature of T3 or higher and then returned to the normal temperature, thereby returning to a cloudy and opaque state again. That is, both opaque and transparent forms at room temperature and intermediate states thereof can be taken. Therefore, by selectively applying heat, the heat-sensitive layer can be selectively heated to form white turbid printing on a transparent portion and transparent printing on a white turbid portion, and the change can be repeated many times.

To perform printing and erasing using such a reversible thermosensitive recording material (thermosensitive rewritable material), two thermal heads for printing and erasing are used, or the applied energy condition is changed. Thus, printing and erasing are performed by a single thermal head. In the former case, the cost of the apparatus increases because two thermal heads are required, but printing and erasing can be performed by fixing the energy application condition of each thermal head and passing the card once. . In the latter case, the operation is complicated because printing and erasing are performed by one thermal head, but the apparatus cost is reduced due to the single thermal head.

In order to produce the heat-sensitive relite material, generally, a solution in which two components of a resin base material and an organic low-molecular substance are dissolved, or a solution of the resin base material (at least one of the organic low-molecular substances is used as a solvent, is used). A dispersion in which an organic low-molecular-weight substance is dispersed in fine particles may be applied to a support such as a plastic film, a glass plate, or a metal plate, dried and cured to form a laminated heat-sensitive layer. The solvent for preparing the heat-sensitive layer or the heat-sensitive relite material can be variously selected depending on the type of the resin base material and the organic low-molecular substance, and examples thereof include tetrahydrofuran, methyl ethyl ketone, methyl isobutyl ketone, chloroform, carbon tetrachloride, ethanol, toluene, and benzene. Be raised. In addition, not only when a dispersion is used, but also when a solution is used, in a heat-sensitive layer obtained, organic low-molecular substances are precipitated as fine particles and exist in a dispersed state.

As the organic low-molecular substance, any substance that changes from polycrystal to single crystal by heat in the recording layer may be used, and one having a melting point of 30 to 200 ° C., preferably about 50 to 150 ° C. is generally used. Such organic low molecular weight substances include alkanol, alkanediol, halogen alkanol or halogen alkane diol, alkylamine, alkane, alkene, alkyne, halogen alkane, halogen alkene, halogen alkyne, cycloalkane, cycloalkene, cycloalkyne, saturated Or unsaturated mono- or dicarboxylic acids or their esters, amides or ammonium salts, saturated or unsaturated halogen fatty acids or their esters, amides or ammonium salts, allyl carboxylic acids or their esters, amides or ammonium salts, halogen allyl carboxylic acids Or their esters, amides or ammonium salts, thioalcohols, thiocarboxylic acids or their esters, amines or ammonium salts, thioalcohols Carboxylic acid esters, and the raised. These may be used alone or in combination of two or more. These compounds have 10 to 10 carbon atoms.
60, preferably 10 to 38, particularly preferably 10 to 30. The alcohol group in the ester may be saturated, may not be saturated, and may be halogen-substituted. In any case, the organic low molecular weight substance contains at least one kind of oxygen, nitrogen, sulfur and halogen in the molecule, for example, -OH, -COOH, -CONH, -COOR, -N
Compounds containing H, -NH2, -S-, -SS-, -O-, halogen, and the like are preferable.

The thickness of the heat-sensitive relite material layer 32 is 1 to 30 μm.
m is preferable, and 2 to 20 μm is more preferable. If the heat-sensitive relite material layer is too thick, heat distribution in the layer will occur, making it difficult to achieve uniform transparency. On the other hand, if the heat-sensitive rewrite material layer is too thin, the turbidity decreases and the contrast decreases. Further, the turbidity can be increased by increasing the amount of the organic low-molecular substance in the heat-sensitive relite material layer. The ratio between the organic low-molecular substance and the resin base material in the heat-sensitive relite material layer is as follows:
The weight ratio is preferably about 2: 1 to 1:16, and 1: 1 to 1
1: 3 is more preferred. When the ratio of the resin base material is less than this, it becomes difficult to form an organic low-molecular substance in a film held in the resin base material. Becomes difficult.

In addition to the above components, additives such as a surfactant and a high-boiling solvent can be added to the heat-sensitive layer 32 in order to facilitate formation of a transparent print. Specific examples of these additives are as follows. Examples of the high boiling solvent include tributyl phosphate, tri-2-ethylhexyl phosphate, triphenyl phosphate, tricresyl phosphate, butyl oleate, dimethyl phthalate, diethyl phthalate, dibutyl phthalate, diheptyl phthalate, and phthalate. Di-n-octyl acid, di-2-ethylhexyl phthalate, diisononyl phthalate, dioctyl decyl phthalate, diisodecyl phthalate, butyl benzyl phthalate, dibutyl adipate, di-n-hexyl adipate, di-2 adipate −
Ethylhexyl, di-2-ethylhexyl azelate, dibutyl sebacate, di-2-ethylhexyl sebacate, diethylene glycol dibenzoate, triethylene glycol di-2-ethyl butyrate, methyl acetyl ricinoleate, methyl acetyl ricinoleate, butyl phthalyl Butyl glycolate, tributyl acetylcitrate and the like are listed.

Examples of surfactants and other additives include polyhydric alcohol higher fatty acid esters, polyhydric alcohol higher alkyl ethers, polyhydric alcohol higher fatty acid esters, higher alcohols, higher alkyl phenols, higher fatty acids, higher alkyl amines, Higher fatty acid amides, lower olefin oxide adducts of fats and oils or polypropylene glycol, acetylene glycol, Na, Ca, Ba or Mg salts of higher alkylbenzene sulfonic acids, higher fatty acids, aromatic carboxylic acids, higher fatty acid sulfonic acids, aromatic sulfonic acids, Ca, Ba or Mg salts of sulfuric acid monoesters or phosphoric acid mono- or di-esters, low sulfated oils, poly long chain alkyl acrylates, acrylic oligomers, poly long chain alkyl methacrylates, long chain alkyl methacrylates to amines Containing monomer copolymer, a styrene-maleic anhydride copolymer, and the like olefin-maleic anhydride copolymer.

Next, a protective layer 31 is provided on the heat-sensitive rewritable material layer 32 in order to prevent the surface from being deformed by the heat and pressure at the time of writing with a heat-sensitive head or the like to reduce the transparency of the transparent portion. Examples of the material of the protective layer 31 include a silicone rubber, a silicone resin, a polysiloxane graft polymer, an ultraviolet curable resin, and an electron beam curable resin. Although the thickness of the protective layer varies depending on the application, it is preferably about 1 to 20 μm. Below this, the protection effect decreases, and above this, the thermal sensitivity decreases.

Next, a method of manufacturing a laminated card will be described with reference to FIGS. As a material of the transparent sheet and the milky white core sheet, for example, a vinyl chloride resin, a vinyl chloride-vinyl acetate copolymer, a polyester resin alone or a combination thereof is used.

First, the front and back designs are printed on the front and back milky sheets 102, which are the front and back printing sheets in FIG. Depending on the design, different printing methods are used, but most of them are offset printing methods, in which fine lines and photographs are printed using UV (ultraviolet) curable ink, or rarely, oxidation polymerization type ink. The UV ink is dried instantly by irradiating ultraviolet rays, and the oxidation polymerization type ink is dried by exposing the printing surface to air and leaving it to stand for a certain period of time. A heavy design and a deep design are printed by the screen printing method. As described above, the usual screen printing ink is dried by removing the solvent. As shown in FIG. 8, in the case of a standard card size (120) such as a credit card or a cash card, printing is performed with 20 to 30 impositions.

After the printing ink has dried, as shown in FIG. 9, the opal white sheet 103 serving as a core is sandwiched between the front and back opal white sheets 102. Laminate under pressure. When a magnetic stripe is required, it is magnetically transferred to a transparent sheet in advance and laminated. As mentioned above, lamination is usually performed by heat and pressure. When using an adhesive, the printing sheet 10
The two sides, or both sides of the opal white (core) sheet 103 and the printing ink side of the transparent sheet are coated with a heat-reactive adhesive. Heat for lamination is 110-150 degrees Celsius if the material is vinyl chloride, pressure is 30K
g / cm ² , the heating time under pressure is 20 to 30 minutes, and the cooling time is 20 to 30 minutes. The multi-sided sheet 110 that has completed the laminating step is sent to a die-cutting step, and one card 10
It becomes 0.

In the IC card, a concave portion for mounting the IC module 5 is formed by a counterbore machine, and an adhesive is applied to an adhesive margin of the counterbore portion. And pressurized by pressure, I
Become a C card.

In the case of both an IC card and a magnetic card, an initialization operation is performed before the card is delivered from the card maker to the user. For magnetic stripe, start code,
Record maker code, order number, production lot number, end code, etc. Almost the same recording is performed for an IC card. In some cases, all the customer codes and necessary data are written on behalf of the card issuing company, and the mail may be mailed to the user.

[0041]

According to the present invention, fixed data and variable data can be printed by one dedicated terminal equipped with a thermal head, so that costs related to the apparatus can be reduced. In addition, the ability to record and display information on a card whose identity has not been identified without being able to rewrite the information proving the identity on the card has increased the user's security and expanded the field of use.

[Brief description of the drawings]

FIG. 1 is a plan view of a surface of an information medium having both a thermosensitive recording display section of the present invention and a rewritable thermosensitive recording display section.

FIG. 2 is a rear plan view of FIG. 1;

FIG. 3 is a diagram for explaining an information medium in which a thermosensitive recording display unit and a rewritable thermosensitive recording display unit are formed on the same surface.

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is an enlarged view of the thermosensitive recording layer 2 of FIG.

FIG. 6 is an enlarged view of the rewritable thermosensitive recording layer 3 of FIG.

FIG. 7 is a diagram for explaining that the transparency of a heat-sensitive relite material changes due to heat.

FIG. 8 is a diagram for explaining a multi-imposition state when printing a card.

FIG. 9 is a view for explaining an outline of a manufacturing process of a laminated card;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Card 100 Card before additional processing 101 Transparent sheet 102 Milky sheet (for printing) 103 Milky sheet (for core) 104 Core sheet 110 Laminated body before die cutting 120 Standard size card (printing surface) 2 Thermal recording display part 3 Thermal rewritable display unit 4 Magnetic recording unit 5 IC module 6, 7 Pre-print unit (print fixed information unit) 21 Protective layer (for thermal rewritable material) 22 Thermal rewritable material layer 23 Base material layer 31 Protective layer (for thermal sensitive recording material) 32 Thermal recording material layer 33 Base material layer

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) B41M 5/36 B41M 5/18 101A G06K 19/08 5/26 102 19/07 G06K 19/00 FJ Fterm (reference) 2C005 HA01 HB04 JA01 JC02 MA01 MB02 QB03 2H026 AA07 AA09 BB02 BB21 DD02 DD31 EE05 FF01 FF17 FF25 2H111 EA14 FA01 FA11 FA30 5B035 AA06 BA05 BB02 BB04 BB09 BB11 BC02

Claims (5)

[Claims] 1. A heat-sensitive recording material comprising an information recording portion, a heat-sensitive coloring layer having a leuco dye, a color developer, and a sensitizer as main components, a resin base material, and the resin base material. An information recording medium comprising a rewritable heat-sensitive variable transparency recording layer whose main component is an organic low-molecular substance dispersed therein and whose transparency reversibly changes depending on temperature, formed on the back surface. . 2. The information recording medium according to claim 1, wherein said information recording section is a magnetic recording section. 3. The information recording medium according to claim 1, wherein said information recording section is an IC module. 4. An information recording unit comprising: a magnetic recording unit;
The information recording medium according to claim 1, wherein the information recording medium is a C module. 5. A thermosensitive recording material provided with a thermosensitive coloring layer containing a leuco dye, a color developer and a sensitizer as main components, a resin base material, and an organic solvent dispersed in the resin base material. 5. A rewritable heat-sensitive variable transparency recording layer whose main component is a molecular substance and whose transparency changes reversibly depending on temperature, is formed on the same surface. An information recording medium according to claim 1.