JPH061085A - Dye receiving layer transfer sheet and composite thermal transfer sheet - Google Patents

Abstract

(57) [Abstract] [Purpose] A dye receiving layer which solves the conventional problems and has good transferability of the dye receiving layer due to temperature change of the thermal head and heat stored in the printer when transferring the dye receiving layer. To provide a transfer sheet and a composite thermal transfer sheet. A transferable dye-receptive layer which is peelable via a release layer is formed on one surface of a long base film, and the release layer is made of a cured product of a curable resin. And a dye-receptive layer transfer sheet, and a transferable dye-receptive layer capable of being peeled off are sequentially formed on one surface of a long base film to form a release layer. A composite thermal transfer sheet comprising a cured body of a curable resin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dye receiving layer transfer sheet and a composite thermal transfer sheet, and more particularly to a dye receiving layer transfer sheet and a composite thermal transfer sheet capable of forming a high quality color image by a thermal transfer system.

[0002]

2. Description of the Related Art Conventionally, various thermal transfer methods have been known. Among them, a sublimation dye is used as a recording agent, and this is carried on a base material film such as paper or plastic film to form a thermal transfer sheet, which is used as a dye transfer material. There has been proposed a method of forming various full-color images on an image-receiving sheet such as a layered paper or plastic film. In this case, the thermal head of the printer is used as the heating means, and a large number of three-color or four-color dots are transferred to the image receiving sheet by heating for an extremely short time, and the full-color image of the original is formed by the multicolor dots. It is to be reproduced.

The image-receiving sheet capable of forming an image by the above method is limited to a dye-stainable plastic sheet or a paper having a dye-receptive layer provided in advance, and an image can be directly formed on ordinary plain paper. There is a problem that there is no. Of course,
Even ordinary plain paper can be image-formed by forming a dye-receptive layer on the surface thereof, but this is generally expensive, and for example, postcards, memos, letter papers, report papers, etc. It is difficult to apply to a general ready-made image receiving sheet such as. As a method of solving such problems, when trying to form an image on a ready-made image receiving sheet such as plain paper,
A dye-receiving layer transfer sheet is known as a method for easily forming a dye-receiving layer only in its necessary portion (for example,
(See JP-A-62-264994). To further simplify the operation, each dye layer of yellow, cyan, magenta and, if necessary, black is sequentially formed on the surface of the long base film, and the transferable dye is received on the same base film. There is known a composite thermal transfer sheet in which a layer is provided, first the dye receiving layer is transferred to an image receiving sheet, and then the dye of each color is transferred to the dye receiving layer to form a full color image,
Further, a composite thermal transfer sheet is further proposed in which a protective layer for protecting the formed dye image is further provided in a surface sequential manner.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved When preparing the above-mentioned dye receiving layer transfer sheet or composite thermal transfer sheet, the layer containing the dye receiving layer is required to have good releasability,
Therefore, a release layer is often formed between the base film and the transferable dye receiving layer. When a dye receiving layer is transferred to an image receiving sheet by using a thermal head or the like using such a dye receiving layer transfer sheet or a composite thermal transfer sheet, the release layer may be melted or melted due to temperature change of the thermal head, heat stored in the printer, or the like. The release layer and the dye receiving layer are softened and fused,
The transferability of the dye-receptive layer may decrease, or part of the release layer may be transferred to the transferred dye-receptive layer surface, resulting in uneven density, missing dots, or missing dots in the image formed on the dye-receptive layer surface. There is a problem that occurs. These problems occur in the case of a composite thermal transfer sheet in which a dye layer and / or a transferable protective layer are provided together with a transferable dye receiving layer on a continuous base film, because the dye receiving layer and the protective layer are also transferred by a thermal head. , Has become a very important issue. Therefore, an object of the present invention is to solve the above-mentioned conventional problems, and when transferring the dye receiving layer, the dye receiving layer having good transferability of the dye receiving layer due to temperature change of the thermal head and heat stored in the printer. A transfer sheet and a composite thermal transfer sheet are provided.

[0005]

The above object can be achieved by the present invention described below. That is, according to the present invention, a transferable dye-receptive layer which is peelable via a release layer is formed on one surface of a long base film, and the release layer is composed of a cured product of a curable resin. And a dye-receptive layer transfer sheet characterized in that one side of a long base film is formed with a dye layer of one or a plurality of colors and a releasable transferable dye-receptive layer in a face-sequential manner. The composite thermal transfer sheet is characterized in that the mold layer is made of a cured body of a curable resin.

[0006]

When the dye receiving layer is transferred by forming the release layer provided on the base film from the hardened body of the curable resin, the dye receiving layer is also affected by the temperature change of the thermal head and the heat stored in the printer. There is provided a dye-receiving layer transfer sheet and a composite thermal transfer sheet having good transferability of

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described in more detail with reference to preferred embodiments. The dye-receptive layer transfer sheet of the present invention has a release layer 2, a dye-receptive layer 3 and an adhesive provided on the surface thereof on one surface of a long base film 1 as schematically shown in the cross section of FIG. 1a. A layer 4 is provided, and the release layer 2 is made of a cured body of a curable resin. Another embodiment shown in FIG. 1b shows the case where an intermediate layer 7 is provided between the transferable dye receiving layer 3 and the adhesive layer 4 of FIG. 1a. 8 is a heat resistant slipping layer for the thermal head.
Further, the composite thermal transfer sheet of the present invention has a dye layer 5 of one color or a plurality of colors, for example, yellow (5Y) on one surface of the long base film 1, as shown in the cross section of FIG. , Magenta (5M), cyan (5C), and optionally black (Bk) (not shown) dye layer 5, and base film 1
Release layer 2, dye receiving layer 3 and adhesive layer 4 provided on the surface of
And the transferable protective layer 6 (and the adhesive layer 4 provided on the surface thereof), which may be provided as necessary, are provided in a frame order,
The release layer 2 is characterized by being made of a cured body of a curable resin. Another embodiment shown in FIG. 3 shows a case where an intermediate layer 7 is provided between the dye receiving layer 3 and the adhesive layer 4 of FIG. 8 is a heat resistant slipping layer for the thermal head.
In another embodiment shown in FIG. 4, the dye receiving layer region and the protective layer region of FIG. 3 are each divided into two, and one is a protective layer region,
This is an example in which the other is the dye receiving layer region, and this may be done.

As the base film used in the present invention, the same base film as that used in the conventional thermal transfer sheet can be used as it is, and other films can also be used and are not particularly limited. Specific examples of the preferable base film include, for example, glassine paper,
Capacitor paper, thin paper such as Paraffin paper, polyester, polypropylene, cellophane, polycarbonate, cellulose acetate, polyethylene, polyvinyl chloride, polystyrene, nylon, polyimide, polyvinylidene chloride,
Examples thereof include plastics such as ionomers, and base film in which these are combined with the preceding paper. The thickness of the base film can be appropriately changed according to the material so that the strength, heat resistance and the like are appropriate, but the thickness is preferably 3 to 100 μm.

In the dye-receiving layer transfer sheet of the present invention,
The release layer 2 is provided on the base film 1 prior to the formation of the dye receiving layer 3 (or the protective layer 6). Such a release layer is composed of a cured body of a curable resin, and as the curable resin, a thermosetting resin, an ionizing radiation curable resin, a room temperature curable resin can be used,
Further, it may be a crosslinked product obtained by crosslinking a thermoplastic resin having a functional group with a crosslinking agent. As the thermosetting resin, phenol resin, urea resin, diallyl phthalate resin, melamine resin, guanamine resin, unsaturated polyester resin, polyurethane resin, epoxy resin, aminoalkyd resin, melamine-urea co-condensation resin, silicon resin, polysiloxane Resin etc. are mentioned. Examples of the ionizing radiation curable resin include ultraviolet curable resin and electron beam curable resin. Further, the room temperature curable resin is curable at room temperature by adding an appropriate catalyst to the thermosetting resin. It is what
As the thermosetting resin having a functional group, polyester resin, acrylic resin, polyvinyl acetal resin,
Cellulose resins and the like can be mentioned. When forming a release layer from these curable resins, a crosslinking agent, if necessary,
A polymerization initiator, a polymerization accelerator, a catalyst, a viscosity modifier, an extender pigment, etc. are added. In a more preferred embodiment, the mold releasability of the dye receiving layer can be further improved by adding a mold releasing agent such as wax, silicone wax, silicone resin, fluororesin or the like when forming the mold releasing layer. The method for forming the release layer is the same as the method for forming the dye receiving layer described below, where the release layer coating liquid is applied onto the substrate film and heated,
A desired release layer can be formed by irradiation with ionizing rays, leaving, aging, etc., and the thickness thereof is about 0.5 to 5 μm. When a matte dye receiving layer is desired after transfer, various particles may be incorporated in the release layer, or the surface of the release layer on the dye receiving layer side may be matted.

In the dye-receiving layer transfer sheet of the present invention,
The dye receiving layer formed on the surface of the release layer is for receiving the sublimable dye transferred from the thermal transfer sheet after the transfer to an arbitrary image receiving sheet and maintaining the formed image. As the resin for forming the dye receiving layer, for example, polyolefin resin such as polypropylene, polyvinyl chloride, vinyl chloride / vinyl acetate copolymer, halogenated polymer such as polyvinylidene chloride, polyvinyl acetate,
Polyacrylic ester and other vinyl polymers, polyethylene terephthalate, polybutylene terephthalate and other polyester resins, polystyrene resins, polyamide resins, copolymer resins of olefins such as ethylene and propylene with other vinyl monomers, ionomers, and cellulose dimers. Cellulose-based resins such as acetate, polycarbonate, and the like are mentioned, and particularly preferable are vinyl-based resins and polyester-based resins. Preferred releasing agents to be mixed with the above resins include silicone oils, phosphate ester type surfactants, fluorine type surfactants and the like, but silicone oils are preferable. Examples of the silicone oil include epoxy-modified, alkyl-modified, amino-modified, carboxyl-modified, alcohol-modified, fluorine-modified,
Modified silicone oils such as alkyl aralkyl polyether modified, epoxy / polyether modified, and polyether modified are desirable.

As the release agent, one type or two or more types are used. The amount of the release agent added is preferably 0.5 to 30 parts by weight with respect to 100 parts by weight of the dye-receiving layer forming resin. If the addition amount range is not satisfied, problems such as fusion of the thermal transfer sheet and the dye receiving layer or reduction of printing sensitivity may occur. By adding such a release agent to the dye receiving layer, the release agent bleeds out on the surface of the dye receiving layer after transfer to form a release layer. The dye receiving layer, on one surface of the release layer, a resin obtained by adding necessary additives such as a release agent to the resin as described above, is dissolved in an appropriate organic solvent or in an organic solvent or water. Dispersed dispersion,
For example, it is formed by applying and drying by a forming means such as a gravure printing method, a screen printing method, and a reverse roll coating method using a gravure plate. The dye receiving layer formed as described above may have any thickness, but it is generally 1 to 10 μm. Further, such a dye receiving layer is preferably a continuous coating, but it may be formed as a discontinuous coating by using a resin emulsion or a resin dispersion.

In the present invention, it is preferable to provide an adhesive layer on the surface of the dye receiving layer in order to improve the transferability of these layers. Any conventionally known pressure-sensitive adhesive or heat-sensitive adhesive can be used for these adhesive layers, but it is more preferable to form them from a thermoplastic resin having a glass transition temperature of 50 ° C. to 80 ° C., for example, a polyamide resin, an acrylic resin. resin,
Vinyl chloride resin, vinyl chloride / vinyl acetate copolymer resin,
A resin having an appropriate glass transition temperature is selected from resins having good adhesiveness under heat such as polyester resin, and the solution is applied and dried to preferably form a film having a thickness of about 0.5 to 10 μm. To do. Further, in the present invention, as shown in FIG. 1b, an intermediate layer 7 can be provided between the dye receiving layer and the adhesive layer. Examples of the material forming the intermediate layer include polyurethane resin, acrylic resin, polyethylene resin, butadiene rubber, and epoxy resin. The thickness of the intermediate layer is 2 to 10 μm
A degree is preferable. The method for forming the intermediate layer may be the same as that for the dye receiving layer. White pigment in the adhesive layer and the intermediate layer,
Optical brighteners and / or bubbles (or blowing agents) can be included. These white pigments and fluorescent whitening agents improve the whiteness of the dye receiving layer after transfer and hide the light yellow color of the paper which is the image receiving sheet, and the air bubbles (or foaming agents) are used for dye receiving. It has the function of imparting good cushioning properties to the layer. As a method of incorporating these additives, a white pigment or the like may be incorporated in the coating liquid used when forming each layer.

In the composite thermal transfer sheet of the present invention, the dye layer is formed on the surface of the substrate film as described above in a frame-sequential manner at a predetermined interval. Such a dye layer is a layer in which a dye is carried by an arbitrary binder resin. As the dye to be used, any of the dyes used in conventionally known thermal transfer sheets can be effectively used in the present invention and is not particularly limited. For example, some preferred dyes include MS Red G, Macrolex Red Violet R, Ceres Red as red dyes.
7B, Samaron Red HBSL, Resolin Red F3BS etc.,
In addition, examples of yellow dyes include Holon Brilliant Yellow 6GL, PTY-52, and Macrolex Yellow 6G, and examples of blue dyes include Kayaset Blue 714, Waxolin Blue AP-FW, and Holon Brilliant Blue S-. R, MS blue 100 and the like.

As the binder resin for carrying the dye as described above, any conventionally known binder resin can be used, and preferred examples include ethyl cellulose, hydroxyethyl cellulose, ethyl hydroxycellulose, hydroxypropyl cellulose, methyl cellulose and acetic acid. Cellulose, cellulosic resins such as cellulose acetate butyrate,
Polyvinyl alcohol, polyvinyl acetate, polyvinyl butyral, polyvinyl acetal, polyvinyl pyrrolidone, vinyl resins such as polyacrylamide, polyesters, and the like. Among these, cellulose-based,
Acetal-based, butyral-based, polyester-based and the like are preferable from the viewpoints of heat resistance, dye migration, and the like. Further, the dye layer may also contain various conventionally known additives as required. Such a dye layer is preferably prepared by adding the sublimable dye, a binder resin and other optional components in a suitable solvent to dissolve or disperse each component to prepare a dye layer-forming coating material or ink. Is formed on the above-mentioned base film by applying and drying the film in a frame-sequential manner. The dye layer thus formed has a thickness of about 0.2 to 5.0 μm, preferably about 0.4 to 2.0 μm, and the sublimable dye in the dye layer contains 5% by weight of the dye layer. Suitably it is present in an amount of ˜90% by weight, preferably 10 to 70% by weight. The transferable dye-receiving layer formed on the surface of the base film in the surface-sequential manner with respect to the dye layer is formed via a release layer as in the case of the dye-receiving layer transfer sheet, and transferred to any image receiving sheet. It is for receiving the sublimable dye transferred from the thermal transfer sheet later and maintaining the formed image.

The relationship between the transferable dye receiving layer and the dye layer is not particularly limited. For example, as shown in FIGS. 2 and 3, one unit is in the order of dye receiving layer → Y → M → C → Bk → protective layer. Although it is general, the present invention is not limited to this and may be the example shown in FIG. 4 or another example. Also, dyes of respective hues are usually provided in the same area, but the transferable dye receiving layer (or protective layer) is transferred twice or more depending on the type of image-receiving sheet and the durability required for the image. In some cases, it may be required to do so, so that it is possible to form a larger area. The method for forming the release layer, the transferable dye-receptive layer (or protective layer) or the intermediate layer may be the same as in the case of the dye-receptive layer transfer sheet except that it is provided in a frame sequential manner. The transferable protective layer can be formed in the same manner as the transferable dye receiving layer as described above, but it is not necessary to form an intermediate layer, and the transferable protective layer is such that an image can be observed through the layer. Therefore, it is necessary to be transparent or semi-transparent. The forming material, forming method, thickness and the like of the protective layer and the adhesive layer formed on the surface thereof may be the same as in the case of the dye receiving layer.

The image receiving sheet for transferring the dye receiving layer and forming an image using the dye receiving layer transfer sheet or the composite thermal transfer sheet as described above is not particularly limited, and examples thereof include plain paper, high quality paper, Any sheet such as tracing paper or plastic film may be used, and in terms of shape, cards, postcards, passports, stationery, report paper,
Any of notebooks, catalogs, etc. may be used, and it is particularly applicable to plain paper and rough paper having a rough surface. The transfer method of the dye receiving layer and the protective layer is a general printer equipped with a thermal head for thermal transfer, a hot stamper for transfer foil, a heat roll, etc., which can be heated to a temperature at which the dye receiving layer or the adhesive layer is activated. Any heating and pressing means may be used.
As a method for forming an image, any conventionally known means can be used. For example, by controlling the recording time with a recording device such as a thermal printer (for example, a video printer VY-100 manufactured by Hitachi Ltd.),
By applying thermal energy of about 5 to 100 mJ / mm ² , the intended purpose can be sufficiently achieved.

[0017]

EXAMPLES Next, the present invention will be described more specifically with reference to Examples and Comparative Examples. In the text, parts and% are based on weight unless otherwise specified. Example 1 An easy-adhesion polyethylene terephthalate film (thickness 6.0 μm, manufactured by Toray) having a heat resistant slipping layer formed on the back surface was coated with the following release layer coating solution to give a dry amount of 1.0 g / m ² . The composition is applied by gravure printing in a ratio, temporarily dried by a dryer, and then dried in an oven at 100 ° C. for 30 minutes to form a release layer. Further, the following dye receiving layer coating solution is gravure printed on the surface. It was applied at a rate of 3.0 g / m ² when dried, provisionally dried by a dryer, and then dried in an oven at 100 ° C. for 30 minutes to form a dye receiving layer. Further, on the surface thereof, the following adhesive layer coating liquid was similarly applied and dried at a rate of 3.0 g / m ² and dried to form an adhesive layer to form the dye-receiving layer transfer sheet of the present invention. Obtained.

[0018]Composition of coating liquid for release layer : Polyvinyl butyral resin (S-REC BX-1, manufactured by Sekisui Chemical Co., Ltd.) 100 parts Polyisocyanate resin (Sumijour N-75, manufactured by Sumitomo Bayer Urethane) 10 parts Methyl ethyl ketone / toluene (weight ratio 1/1) 400 parts Composition of coating liquid for dye receiving layer : Vinyl chloride / vinyl acetate copolymer resin (VYHD, manufactured by UCC) 100 parts Epoxy-modified silicone (KF-393, manufactured by Shin-Etsu Chemical Co., Ltd.) 8 parts Amino-modified silicone (X-22-343, manufactured by Shin-Etsu Chemical Co., Ltd.) 8 parts Methyl ethyl ketone / Toluene (weight ratio 1/1) 400 partsCoating liquid composition for adhesive layer : Polyester resin (UE3201, Unitika, Tg65 ° C.) 100 parts Methyl ethyl ketone / toluene (weight ratio 1/1) 400 parts

Example 2 A dye receiving layer transfer sheet of the present invention was obtained in the same manner as in Example 1 except that the following coating liquid was used in place of the release layer coating liquid. Composition of coating liquid for release layer : Epoxy resin (S-129, manufactured by Dainippon Ink) 100 parts Polyamide curing agent (Versamide 125, manufactured by General Mill) 10 parts Toluene / dimethylformamide (1/1) 100 parts (after drying) And cured at room temperature for 3 hours) Example 3 The following coating liquid was used in place of the releasing layer coating liquid in Example 1, and the other conditions were the same as in Example 1 except that the dye receiving layer transfer of the present invention was performed. Got the sheet. Composition of coating liquid for release layer : Methacrylate oligomer (SR-367, manufactured by Saltomer) 100 parts Acrylate oligomer (light ester HOA, manufactured by Kyoeisha Oil & Fat) 200 parts Photoinitiator (Ubicryl P36, manufactured by UCB) 2 parts (for UV irradiation) Cross-linked)

Example 4 A dye receiving layer transfer sheet of the present invention was obtained in the same manner as in Example 1 except that the following coating liquid was used in place of the release layer coating liquid. Composition of coating liquid for release layer : Melamine resin (Watersol S-695, manufactured by Dainippon Ink) 100 parts Water 500 parts (after drying, cured at 150 ° C. for 3 minutes) Example 5 A heat resistant slipping layer was formed on the back surface. On the surface of the formed easy-adhesion polyethylene terephthalate film (thickness 6.0 μm, manufactured by Toray), the same release layer coating solution as in Example 1 was applied in the same manner as in Example 1 with a width of 60 cm and an interval of 90 cm. Then, a dye receiving layer and (adhesive layer) and a protective layer (and adhesive layer) were formed thereon. For the dye-receptive layer and the protective layer, a dye-receptive layer coating solution having the following composition is applied by gravure printing at a rate of 3.0 g / m ² when dried, provisionally dried with a drier, and then dried in an oven at 100 ° C. for 30 minutes. The adhesive layer was formed on the dye receiving layer surface and the protective layer surface at the rate of 3.0 g / m < ² > when dried using the adhesive solution described below.

Composition of coating liquid for dye receiving layer : Vinyl chloride / vinyl acetate copolymer resin (VYHD, manufactured by UCC) 100 parts Epoxy modified silicone (KF-393, manufactured by Shin-Etsu Chemical Co., Ltd.) 8 parts Amino modified silicone (X-22 -343, manufactured by Shin-Etsu Chemical Co., Ltd.) 8 parts Methyl ethyl ketone / toluene (weight ratio 1/1) 400 parts Coating liquid composition for protective layer : Vinyl chloride / vinyl acetate copolymer resin (VYHD, manufactured by UCC) 100 parts Methyl ethyl ketone / toluene ( Weight ratio 1/1) 400 parts Adhesive layer coating liquid composition : Butyral resin (BL-3, Sekisui Chemical Co., Tg 54 ° C) 100 parts Methyl ethyl ketone / toluene (weight ratio 1/1) 300 parts Silica (antiblocking agent ) Small amount Next, prepare an ink for the dye layer with the following composition and apply it to the surface of the base film where the dye receiving layer is not formed. S width 30cm
Each was coated and dried by a gravure coater so that the dry coating amount was 1.0 g / m ² , to obtain a composite thermal transfer sheet of the present invention.

Ink composition for dye layer : Disperse dye (Kayaset Blue 714, manufactured by Nippon Kayaku) 4.0 parts Ethyl hydroxycellulose (manufactured by Hercules) 5.0 parts Methyl ethyl ketone / toluene (weight ratio 1/1) 80. 0 parts Dioxane 10.0 parts In the same manner, a yellow thermal transfer sheet was replaced with a yellow disperse dye (Macrolex Yellow 6G, Bayer Co., CIDisper).
se Yellow 201), and a magenta thermal transfer sheet was formed using a magenta disperse dye (CIDisperse Red 60). Example 6 A composite thermal transfer sheet of the present invention was obtained in the same manner as in Example 5, except that the same coating liquid as in Example 2 was used instead of the release layer coating liquid in Example 5.

Example 7 The same procedure as in Example 6 was carried out except that the following intermediate layer coating solution was applied to the surface of the dye receiving layer at a rate of ² g / m ² and dried to form a white intermediate layer. Thus, a composite thermal transfer sheet of the present invention was obtained. Coating liquid composition for intermediate layer Acrylic resin (BR-106, manufactured by Mitsubishi Rayon) 100 parts Titanium oxide (manufactured by Tochem Products, TCA888) 50 parts Methyl ethyl ketone / toluene (weight ratio 1/1) 400 parts Example 8 Example 6 In the same manner as in Example 6, except that the following intermediate layer coating liquid was applied at a rate of ² g / m ^{2 on} the surface of the dye-receiving layer and dried to form a white intermediate layer, the composite thermal transfer sheet of the present invention was obtained. Obtained. Coating liquid composition for intermediate layer Acrylic resin (BR-106, manufactured by Mitsubishi Rayon) 100 parts Azodicarbonamide foaming agent (Vinihol AK # 2, manufactured by Eiwa Chemical Co., Ltd.) 30 parts Titanium oxide (manufactured by Tochem Products, TCA888) 50 parts Methyl ethyl ketone / Toluene (weight ratio 1/1) 400 parts

Comparative Example 1 A dye receiving layer transfer sheet of Comparative Example was obtained in the same manner as in Example 3 except that the release layer was formed from a coating liquid having the following composition. Composition of coating liquid for release layer : Acrylic resin (BR-88, manufactured by Mitsubishi Rayon) 100 parts Methyl ethyl ketone / toluene (weight ratio 1/1) 400 parts Comparative Example 2 A composite thermal transfer sheet of a comparative example was obtained in the same manner as in Example 6 except that it was formed from Dex 1670 (N), manufactured by Dainippon Ink Co., Ltd.

USE EXAMPLE 1 The dye-receiving layer transfer sheets of Examples 1 to 4 and Comparative Example 1 and plain paper were superposed and the dye-receiving layer was transferred using a thermal head. Next, a cyan thermal transfer sheet was overlaid on the surface of this dye receiving layer, and a thermal head was used to output 1 W / dot and a pulse width of 0.3 to 0.45 mse.
c. Printing was performed on the entire surface of the dye receiving layer under the condition of a dot density of 3 dots / mm to form a betacyan image. When the transferability (environmental temperature of 20 ° C. and 40 ° C.) and the image quality of the dye receiving layer during image formation were observed, the results shown in Table 1 below were obtained. Use Example 2 Images were formed in the same manner as in Use Example 1 using the composite thermal transfer sheets of Examples 4 to 8 and Comparative Example 2 and evaluated in the same manner, and the results shown in Table 1 below were obtained.

[0025]

[Table 1]

[0026]

[Effects] According to the present invention as described above, when the release layer provided on the base film is formed of a cured body of a curable resin, when the dye receiving layer is transferred, the temperature change of the thermal head and A dye-receiving layer transfer sheet and a composite thermal transfer sheet having good transferability of the dye-receiving layer even when heat is stored in the printer are provided.

[Brief description of drawings]

FIG. 1 is a diagram schematically illustrating a cross section of a dye-receiving layer transfer sheet of the present invention.

FIG. 2 is a diagram schematically illustrating a cross section of a composite thermal transfer sheet of the present invention.

FIG. 3 is a diagram schematically illustrating a cross section of a composite thermal transfer sheet of the present invention.

FIG. 4 is a diagram schematically illustrating a cross section of a composite thermal transfer sheet of the present invention.

[Explanation of symbols]

 1: Base film 2: Release layer 3: Dye receiving layer 4: Adhesive layer 5: Dye layer 6: Protective layer 7: Intermediate layer 8: Heat resistant slipping layer

Claims (6)

[Claims] 1. A transferable dye-receptive layer, which is peelable via a release layer, is formed on one surface of a long base film, and the release layer comprises a cured product of a curable resin. Characteristic dye-receiving layer transfer sheet. 2. The dye-receiving layer transfer sheet according to claim 1, wherein the release layer is a film made of a cross-linked body of a thermosetting resin, an ionizing radiation curable resin, a room temperature curable resin or a thermoplastic resin. 3. A continuous base film, on one side of which a dye layer of one color or a plurality of colors and a transferable dye receiving layer capable of peeling are sequentially formed, and the release layer is a curable resin. A composite thermal transfer sheet characterized by comprising a cured body of. 4. The composite thermal transfer sheet according to claim 3, wherein the release layer is a film made of a crosslinked body of a thermosetting resin, an ionizing radiation curable resin, a room temperature curable resin or a thermoplastic resin. 5. The composite thermal transfer sheet according to claim 3, further comprising a transferable protective layer provided in a frame sequential manner. 6. The transferable dye-receptive layer comprises an intermediate layer and an adhesive layer, and at least one of these layers is at least one selected from the group consisting of white pigments, optical brighteners and bubbles (or foaming agents). The composite thermal transfer sheet according to claim 3, which contains a seed.