JP2001277726A - Reversible thermal recording transfer sheet, its manufacturing method, and method for manufacturing reversible thermal recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reversible thermal recording medium having an island shaped reversible thermal recording part without a slivering of an edge while its manufacturing method, a reversible thermal recording transfer tape used for preparing the reversible thermal recording medium and its manufacturing method are provided. SOLUTION: The reversible thermal recording transfer sheet is provided wherein a peel part, the reversible thermal recording part and an island shaped half cut part are provided from the reversible thermal recording part into the layer of the peel part.

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 transfer sheet, a method for producing a reversible thermosensitive recording transfer sheet, and a method for producing a reversible thermosensitive recording medium, and more particularly to an island-shaped reversible thermosensitive recording section. The present invention relates to a reversible thermosensitive recording transfer sheet used for producing a reversible thermosensitive recording medium, a method for producing the same, and a method for producing a reversible thermosensitive recording medium.

[0002]

2. Description of the Related Art In recent years, among various cards including an ID card and the like, there is a card that reversibly records and erases information on a card by using reversible thermal recording. A reversible thermosensitive recording medium is known as a member for providing such a reversible thermosensitive recording in the card or the like.

Conventionally, such a reversible thermosensitive recording medium has been
The reversible thermosensitive recording transfer sheet was manufactured by the following method. Hereinafter, FIGS. 9, 10, and 1
With reference to FIG. 1 and FIG. 12, a description will be given of a reversible thermosensitive recording transfer sheet, a method of manufacturing the same, a reversible thermosensitive recording medium using the reversible thermosensitive recording transfer sheet, and a method of manufacturing the same in the related art.

FIG. 9 shows a reversible thermosensitive recording transfer sheet (hereinafter, referred to as a transfer sheet 90) according to the prior art.
This will be described with reference to FIG.

As shown in FIG. 12, for example, a transfer sheet 90 includes a peeling section 910 and a reversible thermosensitive recording section 920.
And The peeling section 910 has a base material 911 and a peeling layer 912. The reversible thermosensitive recording section 920 includes a protective layer 921, a reversible thermosensitive recording layer 922, and a barrier layer 92.
3, and a heat-sensitive adhesive layer 924.

The peeling section 910 is provided with a reversible thermosensitive recording section 920
Is the basis for forming This role is played by the peeling section 91.
0 base material 911 is responsible. Further, as shown in FIG. 9C, the peeling portion 910 needs to be peeled from the base (hereinafter, referred to as the overlay film 91). The release layer 912 is a layer formed to have this release function.

The reversible thermosensitive recording section 920 performs reversible thermosensitive recording. The barrier layer 923 and the protective layer 921
This is a layer for protecting the reversible thermosensitive recording layer 922. The reversible thermosensitive recording layer 922 is a layer for performing reversible thermosensitive recording. The heat-sensitive adhesive layer 924 is a layer for bonding the reversible thermosensitive recording layer 922 to the overlay film 91 and using the overlay film 91 as a reversible thermosensitive recording medium.

As described above, the transfer sheet 90 employs the above-described layer structure to adhere the reversible thermosensitive recording section 920 for performing reversible thermosensitive recording to the overlay film 91 and to remove unnecessary peeling for reversible thermosensitive recording. The portion 910 can be peeled off.

A method of manufacturing the transfer sheet 90 according to the prior art will be described with reference to FIG.

The reversible thermosensitive recording section 92 is provided on the peeling section 910.
The transfer sheet 90 is produced by laminating 0. More specifically, the separation portion 910 is manufactured by sequentially stacking the separation layer 912 on the base material 911. Then, the protective layer 921 and the reversible thermosensitive recording layer 92
2. The transfer sheet 90 is manufactured by sequentially laminating the barrier layer 923 and the heat-sensitive adhesive layer 924.

A rewritable card 95 which is an example of a reversible thermosensitive recording medium according to the prior art will be described with reference to FIG.

The rewrite card 95 shown in FIG.
Has a stripe-shaped reversible thermosensitive recording section 920. As shown in the cross-sectional view in the short side direction of the rewrite card 95 in FIG. 11B, the rewrite card 95 includes an overlay film 91, a center core film 92, and an overlay film 93 having a strip-shaped reversible thermosensitive recording section 920. Having. Thus, the rewrite card 95 can perform reversible thermosensitive recording by having the strip-shaped reversible thermosensitive recording section 920.

A rewritable card 95 which is an example of a reversible thermosensitive recording medium using a transfer sheet 4 in the prior art.
Will be described with reference to FIGS. 9, 10, and 12. FIG.

The transfer sheets 90 (b), (c) and (d) are manufactured by slitting the transfer sheet 90 (a) to a predetermined width. Transfer sheet 90 (e)
As shown in FIG. 9B, heat transfer is performed on the overlay film 91. Next, as shown in FIG. 9C, the peeling portion 910 of the transfer sheet 90 (e) is
It peels off from the peeling layer 912 of (e).

As a result, a reversible thermosensitive recording section 920 for performing reversible thermosensitive recording is formed on the overlay film 91, and the overlay film 91 becomes a reversible thermosensitive recording medium.

As shown in FIG. 10D, the overlay film 91 on which the reversible thermosensitive recording section 920 is formed has
The film 94 is produced by heat bonding with the center core film 92 and the overlay film 93. As shown in FIG. 10E, the film 94 is punched into a predetermined size, and the rewrite card 9 which is one form of a reversible thermosensitive recording medium having a stripe-shaped reversible thermosensitive recording section 920 is formed.
5 is produced.

[0017]

However, according to the above prior art, as shown in FIG. 11A, it is limited to manufacturing only a reversible thermosensitive recording medium having a stripe-shaped reversible thermosensitive recording section. Have been.

That is, as shown in FIGS. 9 and 10, the transfer sheet 90 is placed on the overlay film 91.
(E) was transferred, and the formed film 94 was punched out to a predetermined size, so that the obtained reversible thermosensitive recording medium was limited to those having a stripe-shaped reversible thermosensitive recording portion.

It has been pointed out that the end of the strip-shaped reversible thermosensitive recording section is exposed, so that the end of the reversible thermosensitive recording section has poor durability. That is, as shown in FIG. 11A, the left and right ends of the reversible thermosensitive recording section 920 are exposed on the left and right sides of the rewritable card 95. Due to this exposure, the strip-shaped reversible thermosensitive recording section may have a problem such as peeling off from the substrate.

Since the recording medium is limited to a reversible thermosensitive recording medium having a stripe-shaped reversible thermosensitive recording section, for example, when the rewritable card 95 shown in FIG. However, if the IC is limited to a portion that does not overlap with the stripe-shaped reversible thermosensitive recording section 920 and the IC is mounted in other portions, the I
It will not be able to function as a C card.

In addition, a sign panel for entering the name of the owner, an emboss, an ID,
It is also necessary to record a lot of information such as a hologram for preventing forgery and a mark for marking the type of the credit card. Thus, the above credit card etc.
It is necessary to record a lot of information, and there is a demand for a card or the like having an island-like reversible thermosensitive recording part that has a part of the strip-like reversible thermosensitive recording part instead of the stripe-like reversible thermosensitive recording part. I have.

As described above, in the above prior art, the shape of the reversible thermosensitive recording section is limited to a stripe, and there is no flexibility in producing an island shape. Therefore, it is pointed out that the use of the reversible thermosensitive recording medium is restricted.

Further, a reversible thermosensitive recording medium having a strip-shaped reversible thermosensitive recording section generally has a structure shown in FIG.
As shown in (1), the shape tends to be limited to a rectangle.

The present invention has been made in view of the above problems, and provides a reversible thermosensitive recording transfer sheet preferably used for producing a reversible thermosensitive recording medium having an island-shaped reversible thermosensitive recording section. The purpose is to:

An object of the present invention is to provide a method for producing a reversible thermosensitive recording transfer sheet for producing a reversible thermosensitive recording medium having an island-shaped reversible thermosensitive recording section.

Another object of the present invention is to provide a method for producing a reversible thermosensitive recording medium having an island-shaped reversible thermosensitive recording section.

[0027]

In order to achieve the above object, the invention according to claim 1 has a peeling section, a reversible thermosensitive recording section, and an island-shaped half-cut section, and has an island-shaped half-cut section. The half-cut part is provided from the reversible thermosensitive recording part side to the inside of the layer of the peeling part.

According to a second aspect of the present invention, in the material of the first aspect, a reversible thermosensitive recording portion other than the island shape is removed.

The invention according to claim 3 is characterized in that a half-cut processing step of half-cutting in an island shape is performed on a tape using a reversible thermosensitive recording transfer sheet having a peeling portion and a reversible thermosensitive recording portion. I have.

According to a fourth aspect of the present invention, in the manufacturing method of the third aspect, in the half-cut processing step, half-cutting is performed from the reversible thermosensitive recording section side to the inside of the layer of the peeling section.

The fifth aspect of the present invention provides the third or fourth aspect.
Is characterized by further comprising a reversible thermosensitive recording portion peeling step of peeling off the reversible thermosensitive recording portion other than the island-shaped region.

The sixth aspect of the present invention is characterized in that the method has a step of providing an island-shaped reversible thermosensitive recording section on a substrate.

According to a seventh aspect of the present invention, in the manufacturing method of the sixth aspect, the step of providing the reversible thermosensitive recording section comprises heating the reversible thermosensitive recording transfer sheet having a peeling section and a reversible thermosensitive recording section to a substrate. It is characterized in that it is press-bonded and the peeling part is peeled off from the reversible thermosensitive recording part.

According to an eighth aspect of the present invention, in the manufacturing method of the seventh aspect, the reversible thermosensitive recording transfer sheet has a half cut portion provided in an island shape.

The ninth aspect of the present invention is the seventh aspect or the eighth aspect of the present invention.
In the manufacturing method of the above, the step of providing the reversible thermosensitive recording section, in transferring the island-shaped area applied to the reversible thermosensitive recording transfer sheet to the substrate, previously peeled off the reversible thermosensitive recording section other than the island-shaped area It is characterized by.

According to a tenth aspect of the present invention, in the manufacturing method according to the ninth aspect, the island-shaped region formed on the reversible thermosensitive recording transfer sheet is provided with multiple faces corresponding to a plurality of reversible thermosensitive recording media, It is characterized in that the step of providing the reversible thermosensitive recording section is performed by multiple imposition.

According to an eleventh aspect of the present invention, in the manufacturing method of the seventh to tenth aspects, the substrate has a core film and an overlay film on at least one side of the core film. The reversible thermosensitive recording portion of the applied island-shaped region is transferred to the surface of the overlay film which is to be the core film, and then the overlay film and the core film are bonded.

According to a twelfth aspect of the present invention, in the manufacturing method of the seventh to tenth aspects, the substrate has a core film and an overlay film on at least one side of the core film. The reversible thermosensitive recording portion of the applied island-shaped region is transferred to the surface of the core film on the side of the overlay film, and thereafter, the overlay film and the core film are laminated.

According to a thirteenth aspect of the present invention, in the method of the eleventh or twelfth aspect, the reversible thermosensitive recording transfer sheet has no protective layer.

According to a fourteenth aspect of the present invention, in the method of the eighth or ninth aspect, the reversible thermosensitive recording transfer sheet is
It is characterized in that a half cut is applied from the reversible thermosensitive recording section side into the layer of the peeling section.

[0041]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a reversible thermosensitive recording transfer sheet, a method of manufacturing the reversible thermosensitive recording transfer sheet, and a method of manufacturing the reversible thermosensitive recording medium according to the present invention will be described below with reference to the drawings. This will be described in detail.

<First Reversible Thermal Recording Transfer Sheet> FIG. 2
The reversible thermosensitive recording transfer sheet according to the present invention (hereinafter, referred to as
Transfer sheet 3) is obtained by forming a reversible thermosensitive recording transfer sheet having the following layer structure, slitting it to an appropriate width, producing a tape shape, and providing a half-cut portion on this tape. . In the present invention, the slit may be performed after providing the half-cut portion,
The slit may be omitted, and the reversible thermosensitive recording transfer sheet may be used as it is. Hereinafter, the layer structure of the transfer sheet 3 will be described in detail with reference to FIG.

<Layer Structure> The transfer sheet 3 includes
And a reversible thermosensitive recording section 2. The peeling section 30
It has a base material 31 and a release layer 32. The reversible thermosensitive recording section 2 has a protective layer 21, a reversible thermosensitive recording layer 22, and a thermosensitive adhesive layer 24. The reversible thermosensitive recording section 2 includes a barrier layer 23 and a reversible thermosensitive recording layer 22 and a thermosensitive adhesive layer 24.
And can be provided between them.

<Peeling Part> The peeling part 30 has a base material 31 and a peeling layer 32. The peeling section 30 has a function as a backing sheet when the reversible thermosensitive recording section 2 is formed. The peeling section 30 is peeled from the reversible thermosensitive recording section 2 after the transfer sheet 3 is transferred to the base.

<Substrate> The substrate 31 is made of, for example, polyethylene terephthalate (PET), polyacetate, polystyrene (PS), epoxy resin, polyvinyl chloride (PV).
C) and a synthetic resin sheet such as polycarbonate (PC), synthetic paper, or a combination thereof. The thickness of the substrate 31 is usually about 10 to 50 μm.

<Peeling Layer> The peeling layer 32 is a layer for improving the peeling performance between the base material 31 and the protective layer 21. Therefore, for the release layer 32, a material that improves this release performance is used. For example, the release layer 32 is a coating layer of a coating agent obtained by adding a release material such as a fluororesin, various waxes, and silicon in a vehicle such as an acrylic resin, a cellulose resin, and a vinyl resin. Resin, silicone, melamine resin, polyolefin resin,
It comprises a coating layer of a coating agent with an ionizing radiation-crosslinkable polyfunctional acrylate, polyester, epoxy or other resin-releasable resin, or an extrusion coat layer.

<Reversible thermosensitive recording section> Reversible thermosensitive recording section 2
Plays a reversible thermosensitive recording function in a reversible thermosensitive recording medium. As shown in FIG. 2, the reversible thermosensitive recording section 2 has a protective layer 21, a reversible thermosensitive recording layer 22, a barrier layer 23, a thermosensitive adhesive layer 24, and the like. Note that the barrier layer 23
May be omitted from the reversible thermosensitive recording section 2.

<Protective Layer> The protective layer 21 is a layer provided to protect the surface of the reversible thermosensitive recording layer 22. Therefore, the protective layer 21 may be made of any material that can achieve this purpose.

The protective layer 21 may contain, for example, an ultraviolet curable resin in order to make the hardness sufficient. In addition, when the protective layer 21 contains silica or the like, appropriate irregularities are formed on the surface. This allows
The glare on the surface of the protective layer 21 and the generation of scratches on the surface of the protective layer 21 are prevented. In addition, a self-cleaning property is given to the thermal head. Alternatively, the release layer may be omitted, and a protective layer having releasability may be used.

<Reversible thermosensitive recording layer> Reversible thermosensitive recording layer 2
Reference numeral 2 denotes a layer capable of reversibly recording and erasing information by being heated by a heating means such as the thermal head.

The reversible thermosensitive recording layer 22 is mainly composed of a leuco dye, a color reducing agent, and a binder resin. The reversible thermosensitive recording layer 22 reversibly repeats coloring and decoloring when heated.

The above leuco dye is usually a colorless or light-colored electron-donating dye precursor. Further, the developer is an electron-accepting compound, which causes a reversible color change in the leuco dye, which is the electron-donating dye precursor, due to a difference in cooling rate after heating. . The developer is a phenolic compound having at least one aliphatic hydrocarbon group having 6 or more carbon atoms, a naphthol compound having at least one aliphatic hydrocarbon group having 6 or more carbon atoms, a phthalic acid compound, or a phenolic hydroxyl group. And an acidic compound having an amino group.

<Leuco Dye> The leuco dye contained as a main component in the reversible thermosensitive recording layer 22 includes crystal violet lactone, 3-indolino-3-p-dimethylaminophenyl-6-dimethylaminophthalide,
Diethylamino-7-chlorofluorane, 2- (2-chlorophenylamine) -diethylaminofluoran, 2
-(2-fluorophenylamino) -6-diethylaminofluoran, 2- (2-fluorophenylamino)-
6-di-n-butylaminofluoran, 3-diethylamino-7-cyclohexylaminofluoran, 3-diethylamino-5-methyl-7-t-butylfluoran,
3-diethylamino-6-methyl-7-anilinofluoran, 3-diethylamino-6-methyl-7-p-butylanilinofluoran, 3-cyclohexylamino-6
-Chlorofluorane, 2-anilino-3-methyl-6
(N-ethyl-p-toluidino) -fluoran, 3-pyrrolidino-6-methyl-7-anilinofluoran, 3-
Pyrrolidino-7-cyclohexylaminofluoran, 3
-N-methylcyclohexylamino-6-methyl-7-
Anilinofluoran, 3-N-ethylpentylamino-
6-methyl-7-anilinofluoran and the like.

The electron-donating dye precursor as the leuco dye may be one or two of the above compounds and the like.
You may make it mix and use a seed or more.

<Sensitive color reducing agent> The sensitive color reducing agent contained as a main component in the reversible thermosensitive recording layer 22 is N- (p-hydroxyphenyl) -N'-n-octadecylthiourea, N
-(P-hydroxyphenyl) -N'-n-octadecyl urea, N- (p-hydroxyphenyl) -N'-n-
Octadecylthioamide, 4'-octadecaneanilide, 2-octadecylterephthalic acid, N-octadecyl (p-hydroxyphenyl) amide, N- (p-hydroxybenzoyl) -N-octadecanoylamine, N-
[3- (p-hydroxyphenyl) propiono] -N '
-Octadecanohydrazide, N-[(p-hydroxyphenyl) methyl] -n-octadecylamide, N-
[(P-hydroxyphenyl) methyl] -n-octadecylurea, N-[(p-hydroxyphenyl) methyl]
—N′-n-octadecyl oxamide and the like.

Further, the following color-reducing agents can be used. N-pentacosyl (p-hydroxyphenyl) amide, N-hexacosyl (p-hydroxyphenyl) amide, N-heptacosyl (p-hydroxyphenyl) amide,
N-octacosyl (p-hydroxyphenyl) amide, N-nonakosyl (p-hydroxyphenyl) amide, N-triacontyl (p-hydroxyphenyl) amide, N-hentriacontyl (p-hydroxyphenyl) amide, N-dotriacontyl ( Amide compounds such as p-hydroxyphenyl) amide, N-tetratriacontyl (p-hydroxyphenyl) amide,

N- (p-hydroxybenzoyl) -N-hexacosanoylamine, N- (p-hydroxybenzoyl) -N-
Heptacosanoylamine, N- (p-hydroxybenzoyl) -N-octacosanoylamine, N- (p-hydroxybenzoyl) -N-nonacosanoylamine, N- (p-hydroxybenzoyl) -N-triaconta Noylamine, N- (p-
Diacylamine compounds such as hydroxybenzoyl) -N-hentriacontanoylamine, N- (p-hydroxybenzoyl) -N-dotriacontanoylamine, N- (p-hydroxybenzoyl) -N-tetratriacontanoylamine ,

N- [3- (p-hydroxyphenyl) propiono] -N'-hexacosanohydrazide, N- [3- (p-hydroxyphenyl) propiono] -N'-heptacosanohydrazide, N- [ 3- (p-hydroxyphenyl) propiono] -N'-
Octacosanohydrazide, N- [3- (p-hydroxyphenyl) propiono] -N'-nonacosanohydrazide, N- [3-
(P-hydroxyphenyl) propiono] -N'-triacontanohydrazide, N- [3- (p-hydroxyphenyl) propiono] -N'-hentriacontanohydrazide, N- [3-
Diacylhydrazine compounds such as (p-hydroxyphenyl) propiono] -N'-dotriacontanohydrazide, N- [3- (p-hydroxyphenyl) propiono] -N'-tetratriacontanohydrazide,

N-[(p-hydroxyphenyl) methyl] -n
-Pentacosylamide, N-[(p-hydroxyphenyl)
Methyl] -n-hexacosylamide, N-[(p-hydroxyphenyl) methyl] -n-heptacosylamide, N-[(p-
(Hydroxyphenyl) methyl] -n-octacosylamide, N-[(p-hydroxyphenyl) methyl] -n-nonacosylamide, N-[(p-hydroxyphenyl) methyl] -n
-Triacontylamide, N-[(p-hydroxyphenyl) methyl] -n-hentriacontylamide, N-[(p-
Amide compounds such as hydroxyphenyl) methyl] -n-dotriacontylamide and N-[(p-hydroxyphenyl) methyl] -n-tetratriacontylamide;

N-[(p-hydroxyphenyl) methyl]-
N'-n-pentacosyl urea, N-[(p-hydroxyphenyl) methyl] -N'-n-hexacosyl urea, N-[(p-hydroxyphenyl) methyl] -N'-n-heptacosyl urea, N-
[(P-hydroxyphenyl) methyl] -N'-n-octacosylurea, N-[(p-hydroxyphenyl) methyl] -N'-n-
Nonacyl urea, N-[(p-hydroxyphenyl) methyl] -N'-n-triacontyl urea, N-[(p-hydroxyphenyl) methyl] -N'-n-hentria contyl urea, N-
[(P-hydroxyphenyl) methyl] -N'-n-dotriacontyl urea, N-[(p-hydroxyphenyl) methyl]-
Urea compounds such as N'-n-tetratriacontyl urea,

N-[(p-hydroxyphenyl) methyl]-
N'-n-pentacosyl oxamide, N-[(p-hydroxyphenyl) methyl] -N'-n-hexacosyl oxamide, N-
[(P-hydroxyphenyl) methyl] -N'-n-heptacosyloxamide, N-[(p-hydroxyphenyl) methyl]
-N'-n-octacosyl oxamide, N-[(p-hydroxyphenyl) methyl] -N'-n-nonakosyl oxamide, N-
[(P-hydroxyphenyl) methyl] -N'-n-triacontyl oxamide, N-[(p-hydroxyphenyl) methyl] -N'-n-hentria contyl oxamide, N-[(p- [Hydroxyphenyl) methyl] -N'-n-dotriacontyloxamide, N-[(p-hydroxyphenyl) methyl] -N'-
Oxalic acid diamide compounds such as n-tetratriacontyl oxamide and the like can be mentioned.

Further, compounds represented by the following chemical formulas can be mentioned.

[0063]

Embedded image

In the above formula, a is an integer of 1 to 3;
Is -CONH-, -NHCO-, -CONHCO-,
It is any group selected from -CONHNHCO- or -NHCOCONH-, and b is an integer of 10 or more.

Further, a naphthol compound having an amide group at the β-position represented by the following general formulas [2-1] and / or [2-2], which causes a reversible color change in the dye precursor upon heating: I can give it.

[0066]

Embedded image

The electron accepting compound used in the present invention can be used alone or in combination of two or more.

The reversible thermosensitive recording layer 22 used in the present invention
In addition to the dye precursor as described above, in addition to the developer,
The following binder resins are preferably used.

<Binder Resin> Reversible thermosensitive recording layer 22
The above-mentioned binder resin contained in starch is, for example, starch, hydroxyethylcellulose, methylcellulose, carboxymethylcellulose, gelatin, casein, polyvinyl alcohol, modified polyvinyl alcohol, sodium polyacrylate, acrylamide / acrylate copolymer, acrylamide Water-soluble polymers such as acrylate / acrylate / methacrylic acid terpolymer, alkali salt of styrene / maleic anhydride copolymer, alkali salt of ethylene / maleic anhydride copolymer, polyvinyl acetate, polyurethane, poly Acrylic acid ester, styrene / butadiene copolymer, acrylonitrile / butadiene copolymer,
Latex such as methyl acrylate / butadiene copolymer and ethylene / vinyl acetate copolymer.

The binder resin is preferably a thermoplastic resin for obtaining a reversible thermosensitive recording layer having excellent distribution of the electron-donating dye precursor and the electron-accepting compound and excellent rewriting durability. A resin having a UV-curable or electron-beam curable resin in which a double bond is introduced into the molecule of the polymer is used. For example, the binder resin is
A resin obtained by ester-polymerizing acrylic acid or methacrylic acid with a vinyl chloride / vinyl acetate / vinyl alcohol copolymer is used.

In order to develop color in the reversible thermosensitive recording layer 22, the reversible thermosensitive recording layer 22 may be heated and then rapidly cooled. In order to erase the color, the reversible thermosensitive recording layer 22 may be heated and then cooled at a slow speed.

For example, when heating is performed by a suitable heat source for a relatively long time, not only the reversible thermosensitive recording layer 22 but also the overlay film and the like are heated. Therefore, the cooling rate is slowed down, and a phase separation state (decoloring state) occurs. On the other hand, after heating in this way, the reversible thermosensitive recording layer 22 is rapidly cooled by pressing a low-temperature metal block or the like, whereby a color-developed state is developed.

As the heat source, a thermal head, a laser beam, a heat roll, a heat stamp, high-frequency heating, radiant heat from a heat source heater, hot air, or the like is used.

Further, by heating the reversible thermosensitive recording layer 22 for a very short time using the above heat source, the reversible thermosensitive recording layer 22 is cooled (solidified) immediately after the heating is completed.
Starts, and a color development state is developed.

As described above, by controlling the cooling rate by using the heat source, the reversible thermosensitive recording layer 22 develops a coloring state and a decoloring state.

<Barrier Layer> The barrier layer 23 protects the reversible thermosensitive recording layer 22 from the material of the thermosensitive adhesive layer, and uses a material such as polyvinyl chloride which is easily softened when heated, such as polyvinyl chloride, as a substrate of the reversible thermosensitive recording medium. This is for giving a certain degree of hardness when heated. Therefore, the barrier layer 23 contains an ultraviolet curable resin in order to make its hardness sufficient. However, the barrier layer 23
Is provided as needed.

<Thermosensitive Adhesive Layer> The thermosensitive adhesive layer 24 is for bonding the reversible thermosensitive recording layer 22 to a medium. Therefore, the heat-sensitive adhesive layer 24 only needs to have this performance. For example, for the heat-sensitive adhesive layer 24, a polyester-based resin, an alkyd-based resin, a vinyl-based resin, a polyurethane-based resin, or a mixed resin thereof is used. When polyvinyl chloride is used as the substrate of the reversible thermosensitive recording medium, the substrate is melted by heating. Therefore, it is not particularly necessary that the heat-sensitive adhesive layer itself melts, as long as it has adhesiveness to the substrate. . The heat-sensitive adhesive layer may also serve as a barrier layer for the purpose of maintaining hardness during heating.

<Half Cut Section> The first reversible thermosensitive recording transfer sheet 3 according to the present invention will be described in detail with reference to FIG.

The transfer sheet 3 is provided with a half-cut section 33 in the direction of the peeling section 30 from the reversible thermosensitive recording section 2 side. That is, as shown in FIG.
The cut is formed from the heat-sensitive adhesive layer 24 to the inside of the layer of the base material 31. As a result, only the island-shaped reversible thermosensitive recording section 2 sandwiched between the half-cut sections 33 (a) and (b) is transferred onto the substrate, and the reversible thermosensitive recording medium having the island-shaped reversible thermosensitive recording section is provided. Can be manufactured. The half cut is usually formed by using a die cut roll provided with a razor-shaped blade having a shape conforming to a mold on the surface of a metal roll.

<Second Reversible Thermosensitive Recording Transfer Sheet> A second reversible thermosensitive recording transfer sheet (hereinafter, referred to as a transfer sheet 6) according to the present invention will be described below with reference to FIGS. This will be described in detail.

The transfer sheet 6 has the layer configuration shown in FIG. That is, the transfer sheet 6 shown in FIG.
The reversible thermosensitive recording section 61 and the half cut section 62
These correspond to the transfer sheet 3, the peeling section 30, the reversible thermosensitive recording section 2, and the half-cut section 33, respectively. Further, the transfer sheet 6 is different from the first reversible thermosensitive recording transfer sheet in that the reversible thermosensitive recording section 61 is peeled off as follows.

<Peeling> The transfer sheet 6 is transferred from the island-shaped reversible thermosensitive recording section 2 provided on the transfer sheet 3 which is the first reversible thermosensitive recording transfer sheet to a reversible thermosensitive recording area other than the island-shaped area. The recording unit 2 has been peeled off. That is, only the reversible thermosensitive recording section 61 for forming the island-shaped reversible thermosensitive recording section 61 on the base exists on the peeling section 60.

This eliminates the need to select and heat-transfer only the reversible thermosensitive recording section 2 having an island shape when transferring onto the substrate as in the case of the first reversible thermosensitive recording transfer sheet. Therefore, unlike the case where the reversible thermosensitive recording medium is manufactured using the first reversible thermosensitive recording transfer sheet, it is not necessary to change the shape of the heat stamp for each island shape. Without heat, the reversible thermosensitive recording transfer sheet can be heat-transferred onto the substrate.

<Third Reversible Thermosensitive Recording Transfer Sheet> In the present invention, a transfer sheet in which a reversible thermosensitive recording layer 22, a barrier layer 23, and a thermosensitive adhesive layer 24 are laminated in this order on a peeling part 30. Is also good. The heat sensitive adhesive layer 24 side of this transfer sheet is connected to the surface side overlay film 7 shown in FIG.
By transferring to the back surface of No. 2, it becomes possible to produce a reversible thermosensitive recording medium having an island-shaped reversible thermosensitive recording section. Further, the heat-sensitive adhesive layer 24 of this transfer sheet
By transferring the side to the center core film 73 shown in FIG. 7, a reversible thermosensitive recording medium having an island-shaped reversible thermosensitive recording section may be produced. The third reversible thermosensitive recording transfer sheet is different from the first or second reversible thermosensitive recording transfer sheet in that the protective layer is omitted. Note that the barrier layer 23 may be omitted.

This transfer sheet is half-cut like the first reversible thermosensitive recording transfer sheet. This makes it possible to produce a reversible thermosensitive recording medium having an island-shaped reversible thermosensitive recording section more easily than a transfer sheet that has not been half-cut.

This half cutting may be performed from the reversible thermosensitive recording section 2 side to the inside of the layer of the peeling section 30 similarly to the first reversible thermosensitive recording transfer sheet. Further, the half cut may be performed from the reversible thermosensitive recording section 2 side to the inside of the layer of the base material 31 similarly to the first reversible thermosensitive recording transfer sheet. As described above, the half cut may be formed by using a die cut roll provided with a razor blade having a shape conforming to the mold on the surface of the metal roll.

<Fourth Reversible Thermosensitive Recording Transfer Sheet>
In the reversible thermosensitive recording transfer sheet of No. 3, the portions other than the reversible thermosensitive recording portion provided in the form of islands were removed from the third reversible thermosensitive recording transfer tape in the same manner as in the case of the second reversible thermosensitive recording transfer sheet. It may be something.

<Method of Manufacturing Reversible Thermosensitive Recording Transfer Sheet>
Hereinafter, first to fourth reversible thermosensitive recording transfer sheets (hereinafter, referred to as “transfer sheets”).
The method for manufacturing the transfer sheet 3 will be described in detail with reference to FIG.

First, a method for producing the first reversible thermosensitive recording transfer sheet will be described. In the first reversible thermosensitive recording transfer sheet, for example, after a release layer 32 is formed on a base material 31 to form a release section 30, the reversible thermosensitive recording section 2 is formed on the release section 30. The reversible thermosensitive recording section 2 has, for example, a layer configuration as shown in FIG. 2. These layers are formed on the release layer 32 of the release section 30 on the protective layer 21, the reversible thermosensitive recording layer 22, the barrier layer 23, and The heat-sensitive adhesive layer 24 and the like are laminated and formed in this order. As these forming methods, conventionally known methods can be used. Note that the reversible thermosensitive recording section 2 may not be provided with the barrier layer 23. A first reversible thermosensitive recording transfer sheet can be obtained by subjecting the tape using the reversible thermosensitive recording sheet provided in this manner to the following half-cutting step.

The present invention has a half-cutting step of applying the half-cut section 33 to the tape from the reversible thermosensitive recording section 2 side of the transfer sheet 3 into the layer of the peeling section 30. For example, it is preferable to apply the half cut portion 33 to the inside of the layer of the base material 31 of the peeling portion 30. This half cut may be formed using a die cut roll. This die-cut roll is generally provided with a razor-shaped blade having a shape corresponding to a mold provided on the surface of a metal roll.

Further, the third method for producing a reversible thermosensitive recording transfer sheet is as follows.
A tape may be produced in the same manner as described above using a reversible thermosensitive recording transfer sheet in which a barrier layer 23 and a heat-sensitive adhesive layer 24 are laminated in this order, and then a half-cut portion 33 may be formed to form a reversible thermosensitive recording transfer sheet. By transferring the heat-sensitive adhesive layer 24 side of the transfer sheet to the back surface side of the overlay film 72 shown in FIG. 7, a reversible thermosensitive recording medium having an island-shaped reversible thermosensitive recording section 71 can be manufactured. Become. The heat-sensitive adhesive layer 2 of the transfer sheet
By transferring the four sides to the front side of the center core film 73, a reversible thermosensitive recording medium having the island-shaped reversible thermosensitive recording section 71 may be manufactured. The half cut portion is obtained in the same manner as the first reversible thermosensitive recording transfer sheet. Note that the reversible thermosensitive recording section 2 has no protective layer. Further, the barrier layer 23 need not be provided.

The second and fourth reversible thermosensitive recording transfer sheet manufacturing methods are the same as those of the first reversible thermosensitive recording transfer sheet.
Alternatively, it is manufactured by peeling the reversible thermosensitive recording section 2 other than the half-cut section 33 applied in the shape of an island from the peeling section 30 using the third reversible thermosensitive recording transfer sheet.

<Reversible Thermosensitive Recording Medium> An example in which the reversible thermosensitive recording medium according to the present invention is applied to an island-shaped rewritable card will be described in detail with reference to FIG. As shown in FIGS. 1A to 1F, an island-shaped rewritable card 1 to which a reversible thermosensitive recording medium according to the present invention is applied has an island-shaped reversible thermosensitive recording section 2. The island shape is a shape in which the end face of the reversible thermosensitive recording section does not appear at the end of a medium such as a card as exemplified in FIGS. 1A to 1F.

The left and right ends of the reversible thermosensitive recording section 2 of the reversible thermosensitive recording medium according to the present invention are not exposed on the left and right sides of the island-shaped rewritable card 1 as shown in FIG. Therefore, the reversible thermosensitive recording section 2 of the prior art does not peel off from the substrate.

Further, as shown in FIG. 1, in the reversible thermosensitive recording medium according to the present invention, an island-shaped reversible thermosensitive recording section 2 is formed in various shapes, Can be set to any position. Therefore, the reversible thermosensitive recording medium according to the present invention can be used in a wide range without any limitation. Furthermore, in the reversible thermosensitive recording medium according to the present invention, the design of the reversible thermosensitive recording section 2 can be freely set without limitation.

As the substrate, various forms can be used. For example, a chlorine-containing polymer; polyvinyl chloride, a vinyl chloride-vinyl acetate copolymer, a vinyl chloride-vinyl acetate-vinyl alcohol copolymer Polyester resins such as vinyl chloride-vinyl acetate-maleic acid copolymer, vinyl chloride-acrylate copolymer, polyvinylidene chloride, vinylidene chloride-vinyl chloride copolymer, vinylidene chloride-acrylonitrile copolymer; polyethylene terephthalate resin; Biodegradable resin such as polybutylene terephthalate resin or condensation ester resin of acid component such as terephthalic acid or isophthalic acid and alcohol component such as ethylene glycol or cyclohexanedimethanol (for example, PETG: trademark of Eastman Chemical Company) Stick resin; polylactic acid-based resin, natural polymer resins comprising the starch and modified polyvinyl alcohol, microbial production resin consisting of β- hydroxybutyrate and β- hydroxyvaleric acid. Further, a polyamide resin, an acrylic resin, a silicone resin, and the like can be used. These materials may be appropriately combined, or a laminate of these materials may be used.

As an example of such lamination, a core film in which two white polyvinyl chloride resin sheets (for example, having a thickness of 280 μm) printed on the surface are laminated, and a front and back surface of the core film (for example, 100μm thick)
A core film in which a transparent polyvinyl chloride resin sheet is laminated as an over film, a core film in which two white PETG sheets (for example, having a thickness of 280 μm) printed on the surface are laminated, and For example, a transparent PETG (with a thickness of 100 μm) laminated as an over film may be used. When using a laminated material as the substrate, after transferring the reversible thermosensitive recording section to one layer of the film constituting the laminated material, and then heat-sealing including other films, or heat-sealing each film After preparing the substrate, the reversible thermosensitive recording medium is transferred to the substrate and further subjected to heat fusion (hot pressing) to produce a reversible thermosensitive recording medium.

The reversible thermosensitive recording medium can be used for laser printing, and those shown in FIGS. 7 and 8 are suitable for laser printing.

FIGS. 7B and 7C are side views of the reversible thermosensitive recording medium 70 in the short side direction. The reversible thermosensitive recording section 71 of the reversible thermosensitive recording medium 70 shown in FIG.
The image is transferred onto the center core film 73 or the core film 75 as shown in (b) or (c). The reversible thermosensitive recording section 71 may be transferred to the back side of the overlay film 72 on the front side. In any case, the protective layer can be omitted from the transfer sheet.

FIG. 8 is a diagram for explaining another example of a reversible thermosensitive recording medium. FIG. 8B is a cross-sectional view taken along the line AA ′ of the reversible thermosensitive recording medium shown in FIG. Thus, the island-shaped reversible thermosensitive recording section 81 is transferred to the core film 83. Then, the reversible thermosensitive recording section 81
Are transferred to the front-side overlay film 82 and the back-side overlay film 83
And protected by Note that the reversible thermosensitive recording section 81
The image may be transferred to the back surface of the front side overlay film 82. In any case, the protective layer can be omitted from the transfer sheet.

<Using the First Reversible Thermosensitive Recording Transfer Sheet
Method for Producing a Reversible Thermosensitive Recording Medium> A method for producing a reversible thermosensitive recording medium using the first reversible thermosensitive recording transfer sheet 3 will now be described in detail with reference to FIGS. .

<Heat Transfer> The heat stamp 5 has substantially the same shape as the island shape formed by the half cut portions 33 (a) and the half cut portions 33 (b) shown in FIG. is there. The transfer sheet 3 is adhered by heat-transferring the heat-sensitive adhesive layer of the tape and the overlay film 4 to the heat stamp 5.

Here, the island-shaped reversible thermosensitive recording section 2 has a half-cut section 33 (a) and a half-cut section 33 (b) so that it can be easily separated from the separation section 30. . Then, the heat stamp 5 heats a region substantially coincident with the island-shaped reversible thermosensitive recording section 2 and press-bonds it to the overlay film 4 so that the island-shaped reversible thermosensitive recording section 2 is attached to the overlay film 4. Transfer to the top.

As shown in FIG. 4, an island-shaped heat stamp 50 having a plurality of heat stamps 5 is used instead of the heat stamp 5, and the reversible thermosensitive recording section 200 is transferred onto the overlay film 40. Is also good.

<First Peeling> When the peeling portion 30 and the (unnecessary) reversible thermosensitive recording portion 2 not transferred to the overlay film 4 are peeled off after the above-described heat transfer, the reversible thermosensitive recording portion 3 is cut in half. Only the island-shaped portion carved in the portion 33 is formed on the overlay film 4.

As described above, since the transfer sheet 3 has the half cut portion 33, the overlay film 4
An island-shaped reversible thermosensitive recording section 2 can be formed thereon.

<Heat Lamination> The overlay film 4 on which the island-like reversible thermosensitive recording sections 2 are formed is thermally bonded to a center core film and another overlay film. This heat bonding is the same as the conventional one. Incidentally, as the other overlay film used here, a film-like film produced from the reversible thermosensitive recording transfer sheet according to the present invention can also be used. Further, as another overlay film, a film-like film manufactured from a known transfer sheet may be used.

<Punching> Production of a reversible thermosensitive recording medium having an island-like reversible thermosensitive recording section as shown in FIG. 1 by punching a film produced by heat bonding into a predetermined size. Becomes possible. For this heat bonding, a known method is used.

<Using the Second Reversible Thermosensitive Recording Transfer Sheet>
A method for manufacturing a reversible thermosensitive recording medium using the second reversible thermosensitive recording transfer sheet 6 will now be described in detail with reference to FIGS. 5 and 6. explain. The half-cut transfer sheet 63, peeling section 601, and reversible thermosensitive recording section 611 shown in FIG. 6 correspond to the transfer sheet 6, peeling section 60, and reversible thermosensitive recording section 61 shown in FIG. 5, respectively.

In the method for producing a reversible thermosensitive recording medium using the second reversible thermosensitive recording transfer sheet 6, the second peeling is performed before the heat transfer. In the second manufacturing method, a heat stamp may not be used at the time of heat transfer.

<Second Peeling> In the second method for producing a reversible thermosensitive recording medium according to the present invention, an unnecessary reversible thermosensitive recording medium is obtained from the half-cut transfer sheet 63 before the heat transfer in the first production method. The recording unit 612 is removed.

<Heat Transfer> Using a transfer sheet having a peeling section 601 and a necessary reversible thermosensitive recording section 610, the transfer sheet is heat-pressed to the overlay film 41 (a). As a result, the reversible thermosensitive recording section 611 is transferred onto the overlay film 41 (a). By using the second manufacturing method in this manner, it is not necessary to use a heat stamp for transferring the reversible thermosensitive recording section 611 to the overlay film 41. Therefore, each time the island shape is changed, it is not necessary to manufacture a new thermal stamp adapted to the new island shape, and furthermore, the transfer sheet is provided with multiple island-shaped regions corresponding to a plurality of reversible thermosensitive recording media. Thus, a manufacturing method suitable for mass production can be easily achieved without producing a new thermal stamp adapted to the island shape.

<Using the Third Reversible Thermosensitive Recording Transfer Sheet
Manufacturing method of the reversible thermosensitive recording medium> The above-mentioned method is used except that the reversible thermosensitive recording section 71 is transferred to the back surface of the front side overlay film 72 shown in FIG. 7 using the third reversible thermosensitive recording transfer sheet. The same method as the method for producing a reversible thermosensitive recording medium using the first reversible thermosensitive recording transfer sheet can be used. Further, as described above, the reversible thermosensitive recording section 71 may be transferred to the front side of the center core film 73 or the core film 75.

<Using the Fourth Reversible Thermosensitive Recording Transfer Sheet
Manufacturing method of the reversible thermosensitive recording medium> Except for transferring the reversible thermosensitive recording section 71 to the back side of the front side overlay film 72 shown in FIG. 7 using the fourth reversible thermosensitive recording transfer sheet, A method similar to the method for manufacturing a reversible thermosensitive recording medium using the second reversible thermosensitive recording transfer sheet can be used. The reversible thermosensitive recording section 71
Is the center core film 73 or the core film 75
May be transferred to the front surface side.

<Examples> Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention should not be construed as being limited to these Examples.

<Example 1><Reversible thermosensitive recording transfer sheet> A reversible thermosensitive recording transfer sheet was produced as follows.

<Peeling Part> The peeling part of the reversible thermosensitive recording transfer sheet was manufactured as follows.

<Substrate> A 25 μm-thick polyethylene terephthalate (PET; manufactured by Toyobo Co., Ltd.)
(Product name E5100) was prepared.

<Release Layer> A material having the following composition was coated on the surface of the above substrate with a # 4 wire bar and dried (120 ° C., 2 minutes) to form a release layer having a thickness of 0.5 μm. Formed. Silicon resin (Shin-Etsu Chemical Co., Ltd., trade name KS-882) 40 parts by weight Polyvinyl butyral resin (Sekisui Chemical Co., Ltd., trade name BL-1) 4 parts by weight Curing agent (Shin-Etsu Chemical Co., Ltd.) Manufactured by CAT-PS-80 (trade name) 1 part by weight Solvent (methyl ethyl ketone: toluene = 1: 1 (weight ratio)) 600 parts by weight

<Reversible thermosensitive recording section> The reversible thermosensitive recording section of the reversible thermosensitive recording transfer sheet was produced as follows.

<Protective Layer> A material having the following composition was put in a container, zirconia beads having a diameter of 2 mm were added, and the mixture was dispersed for 60 minutes with a paint shaker. This was coated on the release layer with a # 7 wire bar, dried (100 ° C., 2 minutes), and irradiated with ultraviolet light (1
60 W / cm, 30 m / min, 1 pass) to form a protective layer having a dry film thickness of 3 μm. 20 parts by weight of UV-curable paint (manufactured by Dainippon Ink and Chemicals, Inc., trade name: UNIDIC C3-374) 1 part by weight of silica (manufactured by Mizusawa Science Co., Ltd., trade name: Mizukasil P-603) Solvent (methyl ethyl ketone: 20 parts by weight of toluene = 1: 1 (weight ratio)

<Reversible thermosensitive recording layer> The reversible thermosensitive recording layer is obtained by placing a material having the following composition in a container on the protective layer,
Zirconia beads having a diameter of 2 mm were added, and dispersed for 120 minutes using a paint shaker, coated with a # 20 wire bar, dried (100 ° C., 1 minute), and irradiated with ultraviolet rays (160 W / cm, 30 m / min, 1 minute). After performing (Pass), a dry film thickness of 5 μm was formed. Leuco dye (3-diethylamino-6-methyl-7-anilinofluoran, trade name ODB, manufactured by Yamamoto Kasei Co., Ltd.) 5 parts by weight Developing agent (N- (4-hydroxyphenyl) -N′-n) -Octadecyl urea) 15 parts by weight Binder resin: thermoplastic resin (resin obtained by ester-polymerizing acrylic acid to a vinyl chloride / vinyl acetate / vinyl alcohol copolymer, NV. 30%) 66 parts by weight Photopolymerization initiator (Ciba) Specialty Chemicals Co., Ltd., trade name Darocur 184) 2 parts by weight Solvent (methyl ethyl ketone: toluene = 1: 1 (weight ratio)) 114 parts by weight

<Barrier Layer> The following materials were used for the barrier layer. The barrier layer uses this material as # 2
Coating on the reversible thermosensitive recording layer with a wire bar of No. 0, drying (100 ° C., 1 minute), and irradiation with ultraviolet light (16
0 W / cm, 30 m / min, 1 pass) and dry film thickness 10μ
m, a barrier layer was formed. 1 part by weight UV-curable dye (manufactured by Dainippon Ink and Chemicals, Inc., trade name: Unidick C3-374) 1 part by weight solvent (methyl ethyl ketone: toluene = 1: 1 (weight ratio))

<Heat Sensitive Adhesive Layer> The heat sensitive adhesive layer is formed by applying a paint having the following composition onto the above barrier layer with a # 14 wire bar and drying (100 ° C., 2 minutes) to obtain a dry film. A heat-sensitive adhesive layer was formed to a thickness of 3 μm. Vinyl chloride / vinyl acetate / maleic anhydride copolymer resin (manufactured by Union Carbide Co., Ltd., trade name: VMCH) 3 parts by weight Solvent (methyl ethyl ketone: toluene = 1: 1 (weight ratio)) 17 parts by weight

<Half-Cut> The tape prepared as described above was half-cut in an island shape using a die-cut roll from the heat-sensitive adhesive layer side to the middle of the base material. Thus, the reversible thermosensitive recording transfer sheet was manufactured.

<Heat Transfer> The island portion of this reversible thermosensitive recording transfer sheet was overlaid on a predetermined position on a transparent hard vinyl chloride film (overlay film) having a thickness of 100 μm. Next, a heat stamp having the same shape as the island shape of the reversible thermosensitive recording transfer sheet was fitted to the island portion of the reversible thermosensitive recording transfer sheet. Then, the reversible thermosensitive recording transfer sheet is heat-transferred (100 ° C., 0.2 k
g / cm2, 1 sec).

<Peeling> From the portion not transferred by heating,
The reversible thermosensitive recording transfer sheet was peeled off from the overlay film. As a result, an island-shaped reversible thermosensitive recording section was transferred onto the overlay film.

<Heat Lamination> The overlay film, center core film (two 280 μm thick white rigid vinyl chloride sheets) onto which the island-like reversible thermosensitive recording section was transferred, and overlay film (100 μm thick transparent rigid chloride) Vinyl sheet) and heat bonding (135 ° C, 50 kg / cm2, 10
min) to produce a film.

<Punching> The film obtained by heat bonding was punched into an outer shape specified in JIS X6301, and a card as a reversible thermosensitive recording medium having an island-shaped reversible thermosensitive recording portion was manufactured.

<Example 2> Hereinafter, a step of producing a first reversible thermosensitive recording transfer sheet according to the present invention, and a card as a reversible thermosensitive recording medium using the first reversible thermosensitive recording transfer sheet Will be described. In addition,
Example 2 is different from Example 1 in the heat transfer step in producing a reversible thermosensitive recording transfer sheet and a reversible thermosensitive recording medium.

<Reversible thermosensitive recording transfer sheet> An adhesive tape was stuck to the end of the reversible thermosensitive recording transfer sheet produced in the first embodiment, and the reversible thermosensitive recording transfer sheet other than the island portion on the reversible thermosensitive recording transfer sheet. The reversible thermosensitive recording section (reversible thermosensitive recording section) was peeled off to produce a reversible thermosensitive recording transfer sheet.

<Heat Transfer> The produced reversible thermosensitive recording transfer sheet was heat-transferred onto an overlay film (100 μm thick transparent hard vinyl chloride film) by a rubber roll heated to 100 ° C. After this heat transfer,
This is the same as the first embodiment.

<Comparative Example 1> In the first embodiment,
A card was produced using the same one as in the first embodiment except that a tape having no island-shaped half-cut portion was used.

Comparative Example 2 Comparative Example 2 for comparing the effects of the first embodiment and the second embodiment.
In the first embodiment, the same one as in the first embodiment was adopted except that the transfer sheet cut into an island shape was used, and was placed on an overlay film and heat-transferred.

<Comparative Results> Table 1 shows the results obtained by comparing Example 1, Example 2, Comparative Example 1, and Comparative Example 2 with each other.

[0136]

[Table 1]

As shown in Table 1, the positioning of the island-shaped reversible thermosensitive recording section at the time of heating and bonding was performed in Example 1,
And it was easy in Example 2, but difficult in Comparative Example 2.

In Examples 1 and 2, the reversible thermosensitive recording section in the form of an island is used as a reversible thermosensitive recording tape and positioned on an overlay film. Therefore, in Examples 1 and 2, if the timing of the reversible thermosensitive recording tape and the overlay film is set once in the manufacturing process, there is no need to perform positioning again.

On the other hand, in Comparative Example 2, the reversible thermosensitive recording section cut out in an island shape must be positioned on the overlay film each time and positioned. Therefore, as described above, in Comparative Example 2, it is difficult to position the island-shaped reversible thermosensitive recording section at the time of heating and bonding.

As described above, according to Examples 1 and 2, it was possible to easily perform the positioning of the island-like reversible thermosensitive recording section during the heat bonding.

As shown in Table 1, when the substrate of the reversible thermosensitive recording transfer sheet was peeled from the reversible thermosensitive recording section (reversible thermosensitive recording section), the island-shaped reversible thermosensitive recording section (reversible thermosensitive recording section) was removed. As a result of comparing the edge cut of the thermal recording section), in the above Examples 1 and 2, the outer periphery of the reversible thermosensitive recording section was transferred onto the overlay film as usual,
In Comparative Example 1, the outer periphery of the reversible thermosensitive recording section was not transferred to the overlay film as usual.

In Examples 1 and 2, since the reversible thermosensitive recording transfer sheet with a half cut was used, the reversible thermosensitive recording portion was transferred onto the overlay film in the shape of an island.

By contrast, in Comparative Example 1 described above, since there was no half-cut and the thickness of the reversible thermosensitive recording tape was large, the reversible thermosensitive recording portion did not peel off from the overlay film according to the mold.

As described above, according to Examples 1 and 2, when the substrate of the reversible thermosensitive recording transfer sheet is peeled off from the reversible thermosensitive recording section (reversible thermosensitive recording section), the island-shaped recording sheet is formed. The reversible thermosensitive recording portion (reversible thermosensitive recording portion) has a good edge cut (outer peripheral shape).

[0145]

As is apparent from the above description, according to the first aspect of the present invention, there is provided an island having a peeling portion, a reversible thermosensitive recording portion, and a half-cut portion provided in an island shape. Since the half cut portion having the shape is provided from the reversible thermosensitive recording portion side to the inside of the layer of the peeling portion, the island-shaped reversible thermosensitive recording portion is easily peeled from the peeling portion. Accordingly, it is possible to provide a reversible thermosensitive recording transfer sheet that can easily transfer the island-shaped reversible thermosensitive recording section onto the substrate.

According to a second aspect of the present invention, in the tape of the first aspect, a reversible thermosensitive recording medium having an island-shaped reversible thermosensitive recording section by removing the reversible thermosensitive recording section other than the island-shaped area. It is possible to provide a reversible thermosensitive recording transfer sheet that does not require the preparation of a heat stamp having substantially the same shape as the island shape.

According to a third aspect of the present invention, a tape using a reversible thermosensitive recording transfer sheet is subjected to a half-cut processing step of half-cutting a half-cut portion into an island shape, thereby forming an island-like reversible thermosensitive recording portion. It becomes possible to produce a reversible thermosensitive recording transfer sheet that can be easily transferred onto a substrate.

According to a fourth aspect of the present invention, in the manufacturing method of the third aspect, the half-cut processing step is to provide a half-cut portion from the reversible thermosensitive recording portion side to the inside of the peeling portion layer. It is possible to manufacture a reversible thermosensitive recording transfer sheet in which the reversible thermosensitive recording section is easily peeled from the peeling section.

The invention according to claim 5 provides the invention according to claim 3 or 4
The manufacturing method of (1), further comprising a reversible thermosensitive recording section peeling step of peeling the reversible thermosensitive recording section outside the island-shaped region, to produce a reversible thermosensitive recording medium having an island-shaped reversible thermosensitive recording section. In this case, it is possible to manufacture a reversible thermosensitive recording transfer sheet that does not require preparing a heat stamp having substantially the same shape as the island shape.

The invention according to claim 6 comprises the step of providing a reversible thermosensitive recording section having an island-shaped reversible thermosensitive recording section on a substrate, whereby the reversible thermosensitive recording section having an island-shaped reversible thermosensitive recording section is provided. It becomes possible to manufacture a recording medium.

According to a seventh aspect of the present invention, in the manufacturing method of the sixth aspect, the step of providing the reversible thermosensitive recording section includes adding a reversible thermosensitive recording transfer sheet having a peeling section and a reversible thermosensitive recording section to a substrate. By peeling off the peeled portion from the reversible thermosensitive recording portion after the thermal transfer, it becomes possible to manufacture a reversible thermosensitive recording medium having an island-shaped reversible thermosensitive recording portion.

According to an eighth aspect of the present invention, in the manufacturing method of the seventh aspect, the reversible thermosensitive recording transfer tape has an island-shaped half cut so that the island-shaped reversible thermosensitive recording portion is peeled off. It is easy to peel off from the part. Therefore, the reversible thermosensitive recording section can be easily transferred onto the substrate.

The ninth aspect of the present invention relates to the seventh or eighth aspect.
The step of providing a reversible thermosensitive recording section, in transferring the island-shaped area applied to the reversible thermosensitive recording transfer sheet to the substrate, peeling the reversible thermosensitive recording section other than the island-shaped area in advance This eliminates the need to produce a new thermal stamp that matches the island shape. Accordingly, it is possible to easily transfer the reversible thermosensitive recording section onto the substrate.

According to a tenth aspect of the present invention, in the manufacturing method of the ninth aspect, the island-shaped region formed on the reversible thermosensitive recording transfer sheet is provided by multiple imposition corresponding to a plurality of reversible thermosensitive recording media. Since the step of providing the reversible thermosensitive recording section is performed with multiple faces, it is not necessary to manufacture a new heat stamp according to the island shape. Further, according to the tenth aspect, it is possible to easily provide a manufacturing method suitable for mass production.

The invention according to claim 11 is the method according to claims 7 to 10, wherein the substrate has a core film and an overlay film on at least one side of the core film. The protective layer of the reversible thermosensitive recording transfer sheet is omitted by transferring the reversible thermosensitive recording part of the applied island-shaped area to the surface of the overlay film that will be the core film side, and then laminating the overlay film and the core film. can do. In addition, it is possible to provide a manufacturing method for manufacturing a reversible thermosensitive recording medium particularly suitable for laser printing.

According to a twelfth aspect of the present invention, in the manufacturing method of the seventh to tenth aspects, the substrate has a core film and an overlay film on at least one side of the core film. Omitting the protective layer of the reversible thermosensitive recording transfer sheet by transferring the reversible thermosensitive recording portion of the applied island-shaped region to at least one surface of the core film, and then laminating the overlay film and the core film. Can be. In addition, it is possible to provide a manufacturing method for manufacturing a reversible thermosensitive recording medium particularly suitable for laser printing.

The invention according to claim 13 is characterized in that, in the production method according to claim 11 or 12, the reversible thermosensitive recording transfer sheet has no protective layer, so that the material for producing the reversible thermosensitive recording transfer sheet can be used. The number of steps can be reduced, and an easier manufacturing method can be provided.

The invention according to claim 14 is the method according to claim 8 or 9, wherein the reversible thermosensitive recording transfer sheet is
By being subjected to half-cut from the reversible thermosensitive recording part side into the layer of the peeling part, the reversible thermosensitive recording part,
It becomes easy to peel from the peeling part. Therefore, a reversible thermosensitive recording medium can be easily manufactured.

[Brief description of the drawings]

FIG. 1 is a view showing a rewritable card having an island-like reversible thermosensitive recording section according to the present invention.

FIG. 2 is a diagram schematically showing a cross section of a transfer sheet according to the present invention.

FIG. 3 is a view for explaining a method for manufacturing a rewritable card having an island-like reversible thermosensitive recording section according to the present invention.

FIG. 4 is a view for explaining a method of transferring a reversible thermosensitive recording section using the island-shaped heat stamp according to the present invention.

FIG. 5 is a view for explaining a method of manufacturing a transfer sheet having a reversible thermosensitive recording portion remaining in an island shape according to the present invention.

FIG. 6 is a view for explaining a method of manufacturing a transfer sheet having a reversible thermosensitive recording portion remaining in an island shape according to the present invention, and a transfer method.

FIG. 7 is a first view showing a rewrite sheet for laser printing according to the present invention.

FIG. 8 is a second diagram showing the laser printing rewrite sheet according to the embodiment of the present invention.

FIG. 9 is a first diagram for explaining a manufacturing process of a rewritable card having a strip-shaped reversible thermosensitive recording section in a conventional technique.

FIG. 10 is a second diagram for explaining a manufacturing process of a rewritable card having a strip-shaped reversible thermosensitive recording section in the related art.

FIG. 11 is a front view of a rewritable card having a strip-shaped reversible thermosensitive recording section, and a side view in a short side direction.

FIG. 12 is a schematic sectional view of a transfer sheet according to a conventional technique.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 island rewrite card 2 reversible thermosensitive recording section 3 transfer sheet 4 overlay film 5 heat stamp 6 transfer sheet 30 peeling section 22 reversible thermosensitive recording layer 23 barrier layer 24 heat sensitive adhesive layer 31 base material 32 peeling layer 33 half cut section 40 Overlay film 41 Overlay film 50 Island heat stamp 51 Heat stamp 60 Peeling part 61 Reversible thermosensitive recording part 62 Half cut part 70 Reversible thermosensitive recording medium 71 Reversible thermosensitive recording part 72 Overlay film 73 Center core film 74 Overlay film 75 Core Film 80 reversible thermosensitive recording medium 81 reversible thermosensitive recording section 82 overlay film 83 core film 84 overlay film 90 transfer sheet 91 overlay film 92 center copy A film 93 Overlay film 94 Film 95 Rewrite card 63 Half cut transfer sheet 200 Reversible thermosensitive recording section 201 Unnecessary reversible thermosensitive recording section 300 Half cut transfer sheet 301 Unnecessary reversible thermosensitive recording section + peeling part 601 Peeling part 600 Necessary reversible thermosensitive recording part 611 Reversible thermosensitive recording part 612 Unnecessary reversible thermosensitive recording part 910 Peeling part 911 Base material 912 Peeling layer 920 Reversible thermosensitive recording part 921 Protective layer 922 Reversible thermosensitive recording layer 923 Barrier layer 924 Heat-sensitive adhesive layer

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) G06K 19/08 B41M 5/18 BF G06K 19/00 F (72) Inventor Haruhiko Osawa 4-14 Koishikawa, Bunkyo-ku, Tokyo No. 12 in Kyodo Printing Co., Ltd. (72) Inventor Mabi Nakanishi 4- 14-12 Koishikawa, Bunkyo-ku, Tokyo F-term in Kyodo Printing Co., Ltd. MB08 PA21 QB02 RA04 RA06 2H026 AA07 AA09 BB02 BB24 EE05 FF01 FF11 FF13 FF17 FF29 GG01 HH00 3B005 EA20 EB01 EB03 EC22 FA04 FB01 FB22 GA02 GB03 5B035 BA01 BA03 BA05 BB09 CA01

Claims (14)

[Claims] 1. A peeling portion, a reversible thermosensitive recording portion, and an island-shaped half-cut portion, wherein the island-shaped half-cut portion is located in the layer of the peeling portion from the reversible thermosensitive recording portion side. And a reversible thermosensitive recording transfer sheet. 2. The reversible thermosensitive recording transfer sheet according to claim 1, wherein the reversible thermosensitive recording portion other than the island shape is removed. 3. A reversible thermosensitive recording transfer, characterized in that a tape using an reversible thermosensitive recording transfer sheet having a peeling section and a reversible thermosensitive recording section is subjected to a half-cut processing step of half-cutting in an island shape. Sheet manufacturing method. 4. The method for producing a reversible thermosensitive recording transfer sheet according to claim 3, wherein in the half-cut processing step, the half-cut is performed from the reversible thermosensitive recording section side to the inside of the layer of the peeling section. 5. The reversible thermosensitive recording transfer sheet according to claim 3, further comprising a reversible thermosensitive recording section peeling step of peeling off the reversible thermosensitive recording section other than the island-shaped area. Method. 6. A method for producing a reversible thermosensitive recording medium, comprising the step of providing an island-shaped reversible thermosensitive recording section on a substrate. 7. The step of providing the reversible thermosensitive recording section comprises: pressing a reversible thermosensitive recording transfer sheet having a peeling section and a reversible thermosensitive recording section onto the substrate by heating and pressing; 7. The method for producing a reversible thermosensitive recording medium according to claim 6, wherein the recording medium is peeled off from a part. 8. The method for producing a reversible thermosensitive recording medium according to claim 7, wherein the reversible thermosensitive recording transfer sheet has a half-cut portion provided in an island shape. 9. The step of providing the reversible thermosensitive recording section,
9. The reversible thermosensitive recording section other than the island-shaped area is peeled off before transferring the island-shaped area applied to the reversible thermosensitive recording transfer sheet to the substrate. A method for producing a reversible thermosensitive recording medium. 10. The island-shaped area formed on the reversible thermosensitive recording transfer sheet is provided with multiple impositions corresponding to a plurality of reversible thermosensitive recording media, and the step of providing the reversible thermosensitive recording section is performed in multiple impositions. 10. The method for producing a reversible thermosensitive recording medium according to claim 9, wherein: 11. The reversible thermosensitive recording portion of an island-shaped region applied to a reversible thermosensitive recording transfer sheet, wherein the substrate has a core film and an overlay film on at least one surface side of the core film. Transfer to the surface that will be the core film side of
11. The method for producing a reversible thermosensitive recording medium according to claim 7, wherein the overlay film and the core film are laminated. 12. The reversible thermosensitive recording portion of the island-shaped region applied to the reversible thermosensitive recording transfer sheet, wherein the substrate has a core film and an overlay film on at least one surface side of the core film. The method for producing a reversible thermosensitive recording medium according to any one of claims 7 to 10, wherein the image is transferred to a surface on the side of the overlay film, and then the overlay film and the core film are laminated. 13. The reversible thermosensitive recording transfer sheet does not have a protective layer.
A method for producing the reversible thermosensitive recording medium according to the above. 14. The reversible thermosensitive recording transfer sheet, wherein a half cut is applied from the reversible thermosensitive recording section side into the layer of the peeling section.
Or a method for producing a reversible thermosensitive recording medium according to item 9.