JPH02243393A - Thermal transfer image receiving paper and preparation thereof - Google Patents

Abstract

PURPOSE:To enhance coating properties, to provide ink receiving properties stable over a long time and to prevent the sticking with an ink donor sheet by applying an electron beam curable composition consisting of an electron beam curable resin, pigment and an electron beam curable leveling agent to at least the single surface of a substrate and irradiating the same with electron beam to provide a film layer. CONSTITUTION:In thermal transfer image receiving paper 7, an electron beam curable resin composition layer 5 consisting of an electron beam curable resin 2, pigment 3 and an electron beam curable leveling agent 4 is provided on a substrate 1. A back coat layer 6 is provided to the rear of the substrate 1. As the representative electron beam curable leveling agent to be used, fluorine-containing acrylate or perfluoloalkyl acrylate such as 2,2,2-trifluoroethyl acrylate, fluorine-containing methacrylate or perfluoroalkyl methacrylate such as 2,2,2- trifluoroethyl methacrylate, silicone-containing acrylate, silicone-containing methacrylate or a derivative thereof and an acrylate modified hydrocarbon surfactant are designated. In the preparation of a thermal transfer image receiving sheet, when pigment is contained in the electron beam curable resin at a high concn., coating properties are enhanced and, in the sheet, sticking or the deterioration of ink receptivity with the elapse of time at the time of printing is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Industrial Field of Application The present invention provides gloss, smoothness, The present invention relates to an image-receiving paper for sublimation type heat-sensitive transfer that has excellent heat resistance, image sharpness, and image storage stability, and particularly excellent anti-sticking and blocking properties.

CB) Prior Art In recent years, sublimation type thermal transfer printers have been used as a means of color hard copying, particularly for reproducing multicolor gradation images. The principle of a sublimation type thermal transfer printer is to convert an image into an electrical signal, and then convert this electrical signal into a thermal signal using a thermal head to print a sheet coated with sublimation ink (ink donor sheet). The heated and sublimated ink is fixed on an image-receiving paper that is in close contact with an ink donor sheet, and the image is reproduced. An image-receiving layer made of a polymer such as saturated copolyester or polyacetate for fixing ink is provided on the surface of such image-receiving paper.

(C) Problems to be Solved by the Invention The need to increase printing speed is an unavoidable problem in dye-sublimation thermal transfer printers, but this requires an increase in processing temperature. However, when performing high-temperature heat treatment on a thermal transfer image receiving paper using paper or synthetic fiber as a base, it goes without saying that the base must have heat resistance.
There is a problem in that the ink image-receiving layer made of a polymer provided on the image-receiving paper is thermally melted, causing sticking between the ink donor sheet and the image-receiving paper, and as a result, only hard copies with poor image reproducibility are obtained. Furthermore, sublimation type heat-sensitive transfer image-receiving paper is known in which a radiation-curable oligomer is coated on a substrate instead of a thermoplastic resin and cross-linked by radiation (Japanese Patent Application Laid-open No. 173295/1983); Even when oligomers are used, there is a problem in that sticking is unavoidable when triacrylates, which have low viscosity and good curability, are used.

In order to solve this problem of sticking, it has been known to partially cure the resin layer that will become the ink-receiving layer, or to add or coat a release material. This was not a desirable solution because it reduced the ink receiving ability of the printer.

In particular, when using a release material, if the image-receiving sheets for thermal transfer are stored in a stacked state, the release material bleeds out to the surface over time and the back side of the image-receiving sheet for thermal transfer that is stacked on top. This resulted in a quality problem in that the sticking property deteriorated.

On the other hand, when using an electron beam curable resin such as a radiation curable oligomer as an ink receiving layer, it is preferable to add a pigment to improve resolution (sharpness) and provide heat insulation properties. Naturally, when a pigment is dispersed in a curable resin, the viscosity of the mixture (referred to as a beam-curable resin composition) increases significantly, which not only makes it difficult to control the coating process with a coater, but also makes it difficult to control the coating process after coating. There has been a problem in that streak-like unevenness on the surface (hereinafter referred to as streak unevenness) is difficult to remove and is fixed as it is by electron beam irradiation, making it impossible to use it as an image-receiving sheet for thermal transfer. Such streaks are a phenomenon that is often seen not only in the application of electron beam curable resin compositions but also in general printing processes. By adding a hydrocarbon surfactant to the coating liquid in advance, the coated surface is smoothed and streaks are eliminated during the transportation process after coating or the curing process by heating.

However, when a conventional type of leveling agent is contained in the electron beam curable composition forming the ink-receiving layer of an image-receiving sheet for thermal transfer, the leveling agent in the coating layer diffuses to the surface after curing, and as a result, the ink There was another serious problem that seriously hindered acceptance.

CD) Means for Solving the Problems The inventors of the present invention have conducted extensive research into means for solving the above-mentioned contradictory problems, and as a result have found the following method. That is, it is characterized in that an electron beam curable composition comprising an electron beam curable resin, a pigment, and an electron beam curable leveling agent is applied to at least one side of the substrate, and a coating layer cured by electron beam irradiation is provided. This is an invention of an image-receiving sheet for thermal transfer. The electron beam curable leveling agent referred to herein is a fluorine-containing acrylate or perfluoroalkyl acrylate, a silicone-containing acrylate or a derivative thereof, or an acrylate-modified hydrocarbon surfactant.

The present invention will be explained in detail below.

In dye-sublimation heat-sensitive transfer printing using an image-receiving sheet for heat-sensitive transfer, in order to improve the resolution (sharpness) of the reproduced image and to provide heat insulation properties, high concentration is added to the electron beam curable resin that forms the ink-receiving layer. When pigments are dispersed, the increase in viscosity makes it difficult to control the coating process using a coater, and the streak-like unevenness (hereinafter referred to as streaking) on the coated surface that occurs after coating is difficult to eliminate and is fixed by electron beam irradiation. It cannot be used as an image-receiving sheet for thermal transfer.

For this reason, it is necessary to mix a leveling agent as a viscosity modifier. However, with general leveling agents (for example, fluorine-based compounds that have a large leveling effect),
Fluoroalkylcarboxylic acid, perfluoroalkylcarboxylic acid, perfluorooctanesulfonic acid jetanolamide, N-propyl-N-(2-hydroxyethyl)perfluorooctanesulfonamide, phosphoric acid bis(
The addition of N-perfluorooctylsulfonyl-N-ethylaminoethyl), monoperfluoroalkylethyl phosphate, etc.) suppresses the occurrence of streaks after applying the electron beam curable composition; After being cured by irradiation, the leveling agent diffuses onto the surface of the coating layer, reducing the ability to accept ink during printing.

The present inventors conducted a printing test using a sublimation type heat-sensitive transfer method after containing various leveling agents in an electron beam curable composition and curing it with electron beams. As a result, the leveling agents commonly used are Although they contribute to lowering the viscosity of the curable composition, the ink receiving ability of the cured product decreases over time; however, certain compounds not only have a sufficient leveling function for electron beam curable compositions, but also have a sufficient leveling function for electron beam curable compositions. The surprising fact was revealed that even after being cured by electron beam irradiation, it does not diffuse into the cured layer (ink-receiving layer) and can be maintained for a long period of time while maintaining high ink-receiving ability. Furthermore, image-receiving sheets for thermal transfer that use certain leveling agents not only have good sticking properties during printing, but also have good sticking properties after long-term storage, which is difficult to achieve when using general release agents. It was found that it has stable sticking properties. Leveling agents with such good performance are all compounds that have electron beam curability, and include fluorine-containing acrylates or perfluoroalkyl acrylates, fluorine-containing methacrylates or perfluoroalkyl methacrylates, fluorine-containing compounds, silicone-containing acrylates, These include silicone-containing compounds such as silicone-containing methacrylate or derivatives thereof, acrylate-modified hydrocarbon surfactants, and methacrylate-modified hydrocarbon surfactants. Below, typical electron beam curable leveling agents used in the present invention are listed.

1) Fluorine-containing acrylate or perfluoroalkyl acrylate General formula: % Formula % Compound 0 For example, 2.2,2-)lifluoroethyl acrylate, 2.2.3.3-tetrafluoropropyl acrylate, IH , IH, 5H-octafluoropentyl acrylate, IH, IH, 2H, 2H-
Examples include hebutadecafluorodecyl acrylate, N-(n-propyl)-N-(β-acryloxyethyl)-perfluorooctyl sulfonic acid amide, perfluoroalkylethyl acrylate, and the like. Product names include Viscoat 3F, Viscoat 4F, Viscoat 8F, Viscoat 17F (Osaka Organic Chemical Industry Co., Ltd.), and E.
F-125M (Mitsubishi Metals Co., Ltd.), AE800, AE
1014, Hoe T 3605 (Hoechst Japan Co., Ltd.), etc.

2) Fluorine-containing methacrylate or perfluoroalkyl methacrylate General formula; % Formula % Compound 0 For example, 2.2.2-) Lifluoroethyl methacrylate, 2.2, ml, 3-tetrafluoropropyl methacrylate, IH, LH, 5H-octafluoropentyl methacrylate, IH, IH, 2H
, 2H-hebutadecafluorodecyl methacrylate, N
-(n-propyl)-N-(β-methacryloxyethyl)-perfluorooctylsulfonic acid amide, perfluoroalkylethyl acrylate, and the like. Product names include Viscoat 3MF, Viscoat 4MF, Viscoat 8MF, and Viscoat 17MF (and above).

Osaka Organic Chemical Industry Co., Ltd.), EF-135M (Mitsubishi Kin JK Co., Ltd.), MAR-600, MAR-1014
, MAR-800, and Hoe T 3606 (manufactured by Hoechst Java Co., Ltd.).

3) Silicone-containing acrylate, silicone-containing methacrylate, or their derivatives A resin in which an acryloyl group or a methacryloyl group is introduced into the terminal or side chain of the main chain of a general silicone resin (mainly polydimethylsiloxane).The product name is FM.
0711, FMO721, FMO725, PS583
(Chisso Corporation), KP-600, X-62-71
40, X-62-7144, X-62-7153, X-
62-7153, X-62-7158, KNS-520
0, X-62-7166, X-62-7168, X-6
2-7177, X-62-7180, x-62-720
0 (Shin-Etsu Chemical Co., Ltd.), RC149, Re2O3
, RC450, Re2O3, RC710, RC720 (
(Goldschmidt & Co.), etc.

4) Acrylate-modified hydrocarbon surfactant, methacrylate-modified hydrocarbon surfactant Having an acryloyl group or methacryloyl group at the end or side chain of the hydrocarbon chain, and a sulfonate or phosphorus group at the other end or side chain. It is a surfactant with an acid salt functional group, and its product names are H-3355N and H-33558 (Daiichi Kogyo Seiyaku Co., Ltd.)
), etc.

The amount of these electron beam curable leveling agents added varies depending on the type of electron beam curable resin and the concentration and type of pigment, but generally it is 0゜0o01% to 5% of the electron beam curable resin.
It is. If the concentration of the electron beam curable leveling agent is lower than this range, the expected leveling effect will not be obtained, and if it is higher than this range, not only will the dispersion of the leveling agent become poor, but it will also cause problems when thermal transfer printing is performed after electron beam curing. Its ink receiving ability is reduced.

The electron beam curable composition used for the ink receiving layer is mainly composed of electron beam polymerizable resins shown below, and these resins are used without a solvent or after being diluted with a solvent.

The electron beam curable resin used in the present invention is a compound having a reactive group such as an acryloyl group, a methacryloyl group, or an epoxy group at the end of the molecule or in the side chain of the molecule.
Unsaturated polyesters, modified unsaturated polyesters, acrylic polymers, acrylic monomers, methacrylic polymers, methacrylic onomers, monomers or oligomers having vinyl unsaturated bonds, epoxy compounds, and the like can be used alone or in combination with other solvents. Typical types are illustrated below.

(a) Polyester acrylate, polyester methacrylate, (b) Urethane acrylate, urethane methacrylate, (c) Monofunctional acrylate, monofunctional methacrylate, (d) Polyfunctional acrylate, polyfunctional methacrylate, (e) Epoxy acrylate, epoxy methacrylate, epoxy Compound (f) Examples include monomers such as polyol acrylate, polyol methacrylate (f>carboxylic acid-modified acrylate, carboxylic acid-modified methacrylate (g>vinylpyrrolidone, acryloylmorpholine, etc.).

As the electron beam curable composition, the above-mentioned resins can be used alone or in combination, taking into consideration the receptivity of sublimation ink. In addition, these resins can be used alone in the electron beam curable composition, or pigments such as ultramarine, cobalt violet, dyes, and oxidation can be used to improve opacity, hue, writability, antistatic properties, etc. Various additives such as inhibitors, optical brighteners, antistatic agents, release agents such as colloidal silica and siloids, and plastic pigments such as barmary can be added in appropriate combinations.

In the present invention, the electron beam curable resin forming the ink receiving layer can be cured by ultraviolet irradiation using a generally known photoreaction initiator.

Substrates used in the present invention include glassine paper, high quality paper,
Paper substrates such as art paper and coated paper, polyethylene,
Synthetic resin sheets such as polypropylene, polyethylene terephthalate, and polyamide, synthetic paper and nonwoven fabric made from these synthetic fibers, resin-coated paper with a water-resistant resin coating layer on the surface of base paper, mica paper, glass vapor, etc. can be used. . There are no particular restrictions on the thickness of the substrate, but paper with good smoothness is preferred, and its basis weight is 50 g/rr.
F ~250 g/rrF is preferred.

In addition, in the present invention, there is no problem with surface treatment such as corona treatment to improve wettability on the substrate surface, and there is no problem with providing a water-soluble polymer intermediate layer. In order to provide heat and heat insulation properties, there is no problem in coating with non-fi pigments, fillers such as calcined kaolin such as Ansilex, plastic pigments, etc.

The base paper mainly composed of natural bulbs, which is advantageously used as a substrate in the method of the present invention, can contain various polymeric compounds and additives.

For example, starch derivatives, polyacrylamides, polyvinyl alcohol derivatives, dry paper strength agents such as gelatin, sizing agents such as fatty acid salts, rosin derivatives, dialkyl ketene dimer emulsions, and wet papers such as melamine resins, urea resins, and epoxidized polyamides. Strength enhancers, stabilizers, pigments, dyes, antioxidants, optical brighteners, various latexes, inorganic electrolytes, pH adjusters, and the like can be contained in appropriate combinations.

The electron beam curable composition used in the present invention contains pigments such as rutile-type or anatase-type titanium dioxide, zinc oxide, talc, calcium carbonate, barium carbonate,
Pigments such as barium sulfate, calcium sulfate, silica, calcined kaolin, and aluminum hydroxide may be contained untreated or after surface treatment with siloxane, alumina, alcohol, acrylamide, or the like. The proportion of the pigment in the electron beam curable composition is preferably from 2% by weight to 50% by weight. If the amount of the electron beam curable resin composition is insufficient or extremely high (ν), not only will the binder ability of the electron beam curable resin composition be insufficient, but also the amount of electron beam irradiation will increase, which will have an undesirable effect on the substrate or internal chemicals. It is from.

A general pigment kneading machine can be used as a method for preparing an electron beam curable composition by mixing a pigment with an electron beam curable resin. For example, a two-roll mill, a three-roll mill, a ball mill, a kneader-1 high speed mixer, a homogenizer, and the like.

The method for applying the electron beam curable composition onto the substrate is as follows:
For example, methods such as blade coating, air doctor coating, squeeze coating, air knife coating, reverse roll coating, gravure rolling and transfer roll coating, curtain coating, kiss coating, gate roll coating, tab size, etc. is used.

The coating amount of the electron beam curable composition to be applied onto the substrate is not particularly limited, but is 1 to 20 g/nf, more preferably 2 to 15 g/nf, and the coating amount of the electron beam curable composition is If it is extremely low, below Ig/m', it is difficult to uniformly apply the electron beam curable composition and pinholes are likely to be generated; It improves the curl and makes it difficult to adjust the curl.

When performing electron beam irradiation to cure the electron beam curable composition layer, the acceleration voltage is 10
0 to 1000 Kv, more preferably 100 to 30
Using a 0Kv electron beam accelerator, the absorbed dose in one pass is 0.
．． It is preferable to set it to 2 to 20 Mrad. If the accelerating voltage or the electron beam irradiation amount is lower than this range, the penetrating power of the electron beam will be too low and sufficient curing will not occur.
Moreover, if it is too large than this range, not only will energy efficiency deteriorate, but also undesirable effects on quality will appear, such as a decrease in the strength of the base paper and decomposition of the resin. The electron beam accelerator may be, for example, an electrocurtain system, a scanning type, a double scanning type, or the like.

Note that during electron beam irradiation, if the oxygen concentration is high, curing of the electron beam curable composition will be hindered, so replacement with an inert gas such as nitrogen, helium, carbon dioxide, etc. is performed to reduce the oxygen concentration to 600 ppm or less, preferably 400 ppm or less. PP! Generally, irradiation is carried out in an atmosphere suppressed to 1 or less, but in cases where only the surface layer is cured by ultraviolet irradiation and the inside of the layer is cured by electron beam irradiation, oxygen substitution is generally necessary. However, it is preferable to circulate cooling gas in order to avoid overheating within the electron beam irradiation device and to exhaust generated ozone.

The ink receiving layer formed into a film by curing the electron beam curable composition by electron beam irradiation as described above can be further treated with a radical polymerization inhibitor.

An image receiving paper for thermal transfer according to the present invention will be explained with reference to the drawings.

FIG. 1 is a schematic side view showing an example of the image receiving paper for thermal transfer of the present invention.

Electrons on substrate 1! ! An electron beam curable resin composition layer 5 consisting of a curable resin 2, a pigment 3, and an electron beam curable leveling agent 4 is provided. A back coat layer 6 may be provided on the back side of the base body 1.

The image receiving sheet 7 for thermal transfer is formed with the above configuration.

(E) Function In the image-receiving sheet for thermal transfer according to the present invention, by using an electron beam curable leveling agent, the pigment is converted into an electron beam curable resin in order to improve the resolution and heat insulation properties during printing by the thermal transfer method. Even when it is contained at a high concentration, coating properties can be improved without causing a significant increase in viscosity. Furthermore, since the leveling agent in the present invention undergoes radical polymerization with the surrounding electron beam curable resin, it does not bleed out onto the surface of the ink receiving layer after electron beam curing. To provide an image-receiving sheet for thermal transfer having stable ink receptivity for a long period of time without deterioration of ink receptivity.

In addition, due to the action of the electron beam curable leveling agent contained, sticking with the ink donor sheet is prevented during printing, providing an image receiving sheet for thermal transfer that has appropriate stiffness and cushioning properties, and has good flatness and curl characteristics. .

CF) Examples The present invention will be explained in detail below using examples, but the content of the present invention is not limited to the examples.

Example 1 A 5% gelatin solution containing formaldehyde and a hardening agent was coated on one side of coated paper (basis weight 110 g/#) as a substrate using an air knife coater so that the dry weight was 1.0 g/#. , dry after setting. Electronic! ! As a curable composition, an electron beam curable composition having the following composition was prepared in a thickness of 10 μm.
After applying the coating using an offset gravure so that the coating thickness is 100 m, and smoothing it with a smoothing bar, it is guided into an electron beam irradiation device (manufactured by ESI, Electrocurtain) that is nitrogen-substituted ('#1 elementary concentration 200 pp blade) and accelerated. Electron beam irradiation was performed under conditions of a voltage of 200 kV and an absorbed dose of 2 Mrad to prepare an image receiving sheet for thermal transfer.

[Electron beam curable composition]

Rutile type titanium dioxide 30% by weight Electron beam curable resin 69.5% by weight Electron beam curable leveling agent 0.5% by weight Electron beam curable resin is triacrylate ester of pentaerythritol acrylic acid adduct and tripropylene glycol diacrylate Using an equal mixture, the electron beam curable leveling agent is perfluoroalkylethyl acrylate; C3F17C2H40CO
CH═CH2 was used, and mixing with rutile titanium dioxide was carried out using a triple roll.

Example 2 A 5% solution of polyvinyl alcohol was applied to one side of a base synthetic paper (TsubojE 90 g/m') using an air knife coater at a dry weight of 0.5 g/g and dried. An electron beam curable composition having the following composition was coated with an offset gravure coater to a thickness of 10 μm and irradiated with an electron beam in the same manner as in Example 1 to prepare an image receiving sheet for thermal transfer. did.

[Electron beam curable composition]

Micronized silica 5% by weight Rutile titanium oxide 25% by weight Electron beam curable resin
69.4% by weight Electron beam curable leveling agent 0
．． The same 6% by weight electron beam curable resin as in Example 1 was used, and the electron 111i! The chemical leveling agent was polydimethylsiloxane tetraacrylate.

Example 3 An electron beam curable composition having the following composition was applied to one side of the substrate photographic baryta paper (basis weight 120 g/g) at Log/r.
n'' and cured by electron beam irradiation in the same manner as in Example 1 to obtain an image-receiving paper for thermal transfer, which was then evaluated.

[Electron beam curable composition]

Rutile type titanium oxide 30% by weight Electron beam curable resin 69.0% by weight Electron beam curable leveling agent 1.0% by weight The same electron beam curable resin as in Example 1 was used, and electron beam curable leveling agent was used. An acrylate-modified surfactant was used as the agent.

Comparative Example 1 An image receiver for thermal transfer was produced in the same manner as in Example 1, except that the electron beam curable leveling agent in Example 1 was replaced with a leveling agent (perfluoroalkylethanol, C3F17C2H40H) that does not have an electron beam curable functional group. Got a sheet.

Comparative Example 2 An image receiving sheet for thermal transfer was prepared in the same manner as in Example 2, except that the electron beam curable leveling agent in Example 2 was replaced with a leveling agent (polydimethylsiloxane carboxylate) that does not have an electron beam curable functional group. I got it.

Comparative Example 3 An image receiving sheet for thermal transfer was prepared in the same manner as in Example 3, except that the electron beam curable leveling agent in Example 3 was replaced with a leveling agent (alkyl sulfonic acid ester) having no electron beam curable functional group. Obtained.

Comparative Example 4 In the electron beam curable resin composition of Example 3, no electron beam curable leveling agent was used, and the proportion of the electron beam curable resin was changed to 3.
An image-receiving sheet for thermal transfer was obtained in the same manner as in Example 3 except that the amount was changed to 0% by weight.

Evaluation (coatability of electron beam curable composition) The electron beam curable composition used in Example 1.2.3 and Comparative Example 1.2.3.4 was continuously applied onto art paper using offset gravure. After smoothing using a smoothing bar, the condition of the coated surface that had been cured by electron beam irradiation was visually judged, and the quality of the coatability was examined based on the degree of occurrence of streaks.

(Sticking) After copying a video image on the thermal transfer receiving paper obtained in Example 1-5 and Comparative Example 1-5 using a dye sublimation thermal transfer printer, stickiness of the reproduced image was measured to determine the ink application. The evaluation was made visually.

The results are shown in Table 1.

(Ink receptivity) Changes in ink receptivity over time are shown in reproduced images when a video image is immediately copied using a sublimation type thermal transfer printer on the image receiving sheets for thermal transfer obtained in Examples and Comparative Examples, and 3. The reflection density of the cyan layer was measured with a Macbeth densitometer in the reproduced image when a video image was similarly copied using a heat-sensitive transfer image-receiving sheet kept at 40°C for several months, and the judgment was made based on the relative value. .

(Others) Whiteness and opacity were evaluated using a Hunter whiteness meter, and curl was evaluated by measuring the curl height after printing.

Results The image-receiving sheets for thermal transfer obtained in Examples and Comparative Examples were all practically satisfactory in terms of whiteness, opacity, and curl.

The image-receiving sheet for thermal transfer obtained in the example showed good coating properties with no streaks occurring during coating. 6. No sticking occurred during printing after fabrication and after aging, and ink acceptance after aging. The properties were also good.

The image-receiving paper obtained in the comparative example had good coating properties when it contained a leveling agent, and no sticking occurred in the prints after production, but the occurrence of sticking was observed in the prints after aging. was there. In addition, ink receptivity was reduced.

When the coating did not contain a leveling agent, streaks occurred during coating, the surface smoothness was extremely reduced, and sticking also occurred during printing.

(Leaving space below) Table 1 Evaluation results of each thermal transfer image-receiving paper Note: Density cannot be compared due to sticking , curl, whiteness, opacity,
In order to create image-receiving sheets for thermal transfer that have excellent properties such as resolution and heat insulation, we have improved the coating properties when pigments are included in high concentrations in electron beam curable resins, thereby reducing streaks and other problems. In addition to suppressing defects, the fabricated image-receiving sheet for thermal transfer does not cause sticking during printing.
In addition, it produces image-receiving sheets for thermal transfer that reduce sticking and deterioration of ink receptivity over time, which could not be achieved with conventional leveling agents.In the present invention, the leveling agent undergoes radical polymerization with the surrounding electron beam curable resin As a result, it provides an excellent image-receiving sheet for thermal transfer without bleed-out or migration to a chemicalized sheet.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing an example of the image receiving paper for thermal transfer of the present invention. 1: Substrate, 2: Electron beam curable resin, 3: Pigment 4: Electron beam curable leveling agent 5: Electron beam curable resin composition layer 6: Back coat layer, 7: Image receiving sheet for thermal transfer

Claims (5)

[Claims] (1) An electron beam curable composition comprising an electron beam curable resin, a pigment, and an electron beam curable leveling agent is coated on at least one side of the substrate, and a coating layer is provided which is cured by electron beam irradiation. Image receiving sheet for thermal transfer. (2) The image-receiving sheet for thermal transfer according to claim (1), wherein the electron beam-curable leveling agent contained in the electron beam-curable composition is a fluorine-containing acrylate or a perfluoroalkyl acrylate. (3) The image-receiving sheet for thermal transfer according to claim (1), wherein the electron beam-curable leveling agent contained in the electron beam-curable composition is a silicone-containing acrylate or a derivative thereof. (4) The image-receiving sheet for thermal transfer according to claim 1, wherein the electron beam-curable leveling agent contained in the electron beam-curable composition is an acrylate-modified hydrocarbon surfactant. (5) Applying an electron beam curable composition containing an electron beam curable resin, a pigment, and an electron beam curable leveling agent to at least one surface of the substrate, and curing it by electron beam irradiation to form a coating layer. A method for producing an image-receiving sheet for thermal transfer.