JP2002103827A - Thermal transfer image receiving sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermal transfer image receiving sheet exhibiting excellent various fastness in the formed image or particularly excellent light resistance and capable of stably existing a formed image in a dye acceptive layer without losing an effect of an ultraviolet absorber during preservation in a method for thermally transferring using a sublimable dye. SOLUTION: The thermal transfer image receiving sheet comprises the dye acceptive layer formed on at least one surface of a base sheet. In this sheet, the acceptive layer contains hexagonal crystal ultrafine particles ZnO and/or ultrafine TiO2. In the image receiving sheet having the acceptive layer formed on at least one surface of the base sheet, a layer containing the hexagonal crystal ultrafine particles ZnO and/or the ultrafine TiO2 is provided on the acceptive layer. In the image receiving sheet having the acceptive layer formed on the one surface of the base sheet, a layer having ultraviolet absorbing capability is provided between the base sheet and the acceptive layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal transfer image-receiving sheet, and more particularly, to an object of the present invention is to provide a thermal transfer image-receiving sheet capable of forming an image excellent in color density, sharpness and various fastnesses, especially light fastness. .

[0002]

2. Description of the Related Art Conventionally, various thermal transfer methods are known. Among them, a sublimable dye is used as a recording agent, and this is carried on a base sheet such as a polyester film to form a thermal transfer sheet. Dyeable transfer material, for example,
There have been proposed methods of forming various full-color images on a thermal transfer image-receiving sheet having a dye-receiving layer formed on paper, plastic film, or the like. In this case, a thermal head of a printer is used as a heating means, and a large number of color dots of three or four colors are transferred to a thermal transfer image receiving sheet by heating for a very short time, and a full-color image of an original is formed by the multicolored dots. Is to reproduce. The image formed in this way is very clear because the coloring material used is a dye, and is excellent in transparency, so that the obtained image is excellent in the reproducibility and gradation of intermediate colors. It is possible to form a high-quality image which is similar to an image by offset printing or gravure printing, and is comparable to a full-color photographic image.

[0003]

However, since the resulting image is formed from a dye, it generally has poorer lightfastness than an image formed by a pigment, and discoloration or discoloration of the image when exposed to direct sunlight. There is a problem that is fast. JP-A-60-101 discloses a technique for solving the above-mentioned disadvantages.
090, JP-A-60-130735, JP-A-61-54982, JP-A-61-229594.
And JP-A-2-141287 disclose that a dye-receiving layer of a thermal transfer image-receiving sheet contains an organic ultraviolet absorber and an antioxidant.

Although the light fastness is improved to some extent by adding an organic UV absorber, the method of simply adding the UV absorber into the dye receiving layer causes the UV absorber to bleed out to the surface of the dye receiving layer. There is a problem that the effect of the ultraviolet absorber is reduced with time due to disappearance or volatilization or decomposition by heat. Further, when the base sheet of the thermal transfer sheet is a white sheet such as paper, even if the dye receiving layer contains an ultraviolet absorber, the effect is limited, according to the study of the present inventors, Ultraviolet light that has passed through the dye receiving layer is re-reflected on the white base sheet surface,
It has been found that the reflected ultraviolet light is irregularly reflected in the receiving layer and greatly affects the light fastness of the image. Accordingly, an object of the present invention is to provide a thermal transfer method using a sublimable dye, in which the formed image exhibits excellent various fastnesses, particularly excellent light fastness, without losing the effect of the ultraviolet absorber during storage. ,
An object of the present invention is to provide a thermal transfer image receiving sheet which can be stably present in a dye receiving layer.

[0005]

The above objects are achieved by the present invention described below. That is, the present invention relates to a thermal transfer image-receiving sheet having a dye-receiving layer formed on at least one surface of a base sheet, wherein hexagonal ultrafine particles Z are formed on the dye-receiving layer.
A thermal transfer image receiving sheet provided with a layer containing nO and / or ultrafine TiO ₂ .

[0006]

The dye receiving layer contains an inorganic ultra-fine particle ultraviolet absorber, a layer containing the ultraviolet absorber is formed on the surface of the dye receiving layer, or an ultraviolet ray is interposed between the substrate sheet and the dye receiving layer. By providing a layer having absorptivity, a heat transfer image with excellent light resistance is formed, and the ultraviolet absorbent does not bleed out to the surface even during storage, and also blocks ultraviolet reflected light from the white base sheet. The resulting thermal transfer image-receiving sheet can be provided.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described in more detail with reference to preferred embodiments. The thermal transfer image-receiving sheet of the present invention comprises a base sheet and a dye receiving layer formed on at least one surface of the base sheet and containing a specific ultraviolet absorbent. As the base sheet used in the present invention, synthetic paper (polyolefin, polystyrene, etc.), woodfree paper, art paper, coated paper, cast-coated paper, wallpaper, backing paper, synthetic resin or emulsion impregnated paper, synthetic rubber latex Various plastic films or sheets such as impregnated paper, paper with synthetic resin, paperboard, cellulose fiber paper, polyolefin, polyvinyl chloride, polyethylene terephthalate, polystyrene, polymethacrylate, and polycarbonate can be used. A white opaque film formed by adding a white pigment or a filler to a resin, a foamed foamed sheet, or the like can be used, and is not particularly limited. Also, a laminate formed by any combination of the above base sheets can be used. Examples of typical laminates include synthetic paper of cellulose fiber paper and synthetic paper or cellulose fiber paper and plastic film or sheet. The thickness of these substrate sheets may be arbitrary, for example, 10 to 30
A thickness of about 0 μm is common. When the substrate sheet as described above has poor adhesion to the dye-receiving layer formed on its surface, it is preferable to apply a primer treatment or a corona discharge treatment to its surface.

[0008] The dye receiving layer formed on the surface of the base sheet is for receiving the sublimable dye transferred from the thermal transfer sheet and maintaining the formed image. Examples of the resin for forming the dye receiving layer include polyolefin resins such as polypropylene, halogenated polymers such as polyvinyl chloride and polyvinylidene chloride, vinyl polymers such as polyvinyl acetate and polyacrylester, polyethylene terephthalate, and poly (ethylene terephthalate). Polyester resins such as butylene terephthalate, polystyrene resins, polyamide resins, copolymer resins of olefins such as ethylene and propylene with other vinyl monomers, ionomers, cellulose resins such as cellulose diacetate, and polycarbonate. Particularly preferred are vinyl resins, polycarbonate resins and polyester resins.

In the present invention, one example of a preferable inorganic ultrafine particle ultraviolet absorber to be added to the dye receiving layer is hexagonal Zn.
O fine particles having a particle diameter of 400 ° or less, preferably 2 °
It is an ultrafine particle of not more than 00 °. If the particle size exceeds 400 °, the dye receiving layer becomes cloudy and the transparency of the receiving layer is impaired. The hexagonal ultrafine particles ZnO preferably have a purity of 96% or more. If the purity is less than 96%, the dye receiving layer may become cloudy due to impurities.

An example of another inorganic ultrafine ultraviolet absorber is ultrafine TiO ₂ , and the ultrafine particles have a particle size of 500 ° or less, preferably 300 ° or less. Typical production methods of this inorganic ultrafine particle ultraviolet absorber are roughly classified into a liquid phase method and a gas phase method, and a water-containing method obtained by a gas phase oxidation method of titanium tetrachloride, a neutralization precipitation reaction of a titanium salt, or thermal hydrolysis. It is obtained by peptizing titanium oxide with hydrochloric acid, nitric acid, acetic acid or the like. Further, a material whose surface is coated with silica can also be used. The ultraviolet absorption wavelength of these ultrafine particles of ZnO or TiO ₂ can be controlled by the crystal structure or the doping metal. In addition, in order to be contained in the dye-receiving layer, a resin having a particularly high affinity for the dye, for example,
Dispersed and used in polyester resin, polyvinyl chloride resin, polycarbonate resin, polyvinyl butyral resin, and ZnO or Ti
O ₂ ultrafine particles whose surface is subjected to a hydrophobic treatment can also be used. The main surface treatment methods include a silane coupling agent, a titanate-based surface treatment agent, a siloxane and a surfactant treatment, and the like. It is preferable to add or use the above-mentioned inorganic fine particles having an ultraviolet absorbing ability at a ratio of 10% by weight to 400% by weight of the resin solid forming the dye receiving layer, and 30% by weight to 200% by weight. % Is more preferred.

The thermal transfer image-receiving sheet of the present invention is obtained by adding at least one surface of the above-mentioned substrate sheet to the above-mentioned resin and adding the above-mentioned additives such as the ultrafine ultraviolet absorber and the release agent to a suitable organic material. The dispersion, which is dissolved in a solvent or dispersed in an organic solvent or water, is applied by a forming means such as a gravure printing method, a screen printing method, a reverse roll coating method using a gravure plate, dried and heated to receive the dye. Obtained by forming a layer. In the formation of the dye-receiving layer, pigments such as titanium oxide, zinc oxide, kaolin clay, calcium carbonate, and finely powdered silica are used for the purpose of improving the whiteness of the dye-receiving layer to further enhance the sharpness of the transferred image. Agents can be added. The dye-receiving layer formed as described above may have any thickness, but generally has a thickness of 1 to 50 μm. Further, such a dye receiving layer is preferably a continuous coating, but may be formed as a discontinuous coating using a resin emulsion or a resin dispersion.

The thermal transfer image-receiving sheet according to the second aspect of the present invention has a dye receiving layer as described above formed on at least one surface of the base sheet, and hexagonal ultrafine ZnO and / or ultrafine particles are formed on the dye receiving layer. It is characterized in that a layer containing TiO ₂ is provided. Such an ultraviolet absorber-containing layer is obtained by adding the ultraviolet absorber to a solution or emulsion containing the same binder or a hydrophilic binder (PVA, PVP, hydroxyethyl polyacrylate, polyacrylic acid, etc.) as the resin for the dye receiving layer. The added coating liquid is 0.1 to
It can be formed by coating to a thickness of about 5 μm. Of course, this UV absorbing layer must not be opaque. The thermal transfer image-receiving sheet according to the third aspect of the invention is characterized in that a layer having an ultraviolet absorbing ability is provided between the base sheet and the dye receiving layer. Such an ultraviolet absorber layer is coated with a coating solution obtained by adding an arbitrary ultraviolet absorber to a solution or emulsion containing the same binder as the resin for the dye receiving layer to a thickness of about 0.2 to 2.0 μm in solid content. It can be formed by processing. This ultraviolet absorbing layer is preferably transparent, but does not have to be transparent.

The amount of the ultraviolet absorber used as described above is not uniform depending on the kind of the ultraviolet absorber, but a preferable range is 350 to 350 which is reflected on the substrate sheet surface after passing through the receptor layer.
It is an amount that blocks 70% or more, preferably 90% or more of reflected light in a wavelength region of 380 nm, and is preferably used in a ratio of 10% by weight to 400% by weight of resin solids forming an ultraviolet absorbing layer. More preferred is a ratio of from 200% to 200% by weight. Further, the ultraviolet absorbing layer in the present invention can also serve as a cushion layer for transferring and recording an image corresponding to image information with little reproducibility at the time of printing with high reproducibility. As the binder resin constituting the ultraviolet absorbing layer when also serving as the cushion layer, any of those conventionally used as a cushion layer of a thermal transfer image-receiving sheet can be used, for example, a polyurethane resin, a polybutadiene resin , Polyacrylate resin, epoxy resin, polyamide resin, rosin-modified phenol resin, terpene phenol resin, ethylene / vinyl acetate copolymer resin, poly (styrene) resin, poly (caprolactone) resin, etc. JIS-K-6
100% modulus specified in 301 is 300K
g / m ² or less (preferably a resin of 100 kg / cm ² or less).

The ultraviolet absorbing layer and the cushion layer can be provided in a thickness of 0.5 to 20 μm by the same method as described above. Although the amount of the ultraviolet absorber contained in the cushion layer is not uniform depending on the type of the ultraviolet absorber, the amount of the ultraviolet absorber reflected on the sheet surface after passing through the dye-receiving layer to the base material 3
It is more effective if the reflected light in the wavelength region of 50 to 380 nm is adjusted so as to block 70% or more, preferably 90% or more. Further, the thermal transfer image-receiving sheet of the present invention can be applied to various uses such as a continuous sheet capable of thermal transfer recording, a sheet sheet, a card, a sheet for making a transmission type original by appropriately selecting a base sheet. . Further, the thermal transfer image-receiving sheet of the present invention can be provided with a cushion layer between the base sheet and the dye receiving layer as needed, and by providing such a cushion layer, noise during printing is reduced and image information is reduced. A corresponding image can be transferred and recorded with good reproducibility.

Examples of the material constituting the cushion layer include polyurethane resin, acrylic resin, polyethylene resin, butadiene rubber, and epoxy resin. The thickness of the cushion layer is preferably about 2 to 20 μm. Further, a lubricating layer can be provided on the back surface of the base sheet. Examples of the material of the lubricating layer include a methacrylate resin such as methyl methacrylate or a corresponding acrylate resin, and a vinyl resin such as a vinyl chloride-vinyl acetate copolymer. Further, it is possible to provide a detection mark on the thermal transfer image receiving sheet. The detection mark is extremely convenient when positioning the thermal transfer sheet and the thermal transfer image receiving sheet. For example, a detection mark that can be detected by a photoelectric tube detector can be provided on the back surface of the base sheet by printing or the like.

The thermal transfer sheet used when performing thermal transfer using the thermal transfer image-receiving sheet of the present invention as described above is one in which a dye layer containing a sublimable dye is provided on paper or polyester film. Any thermal transfer sheet can be used as it is in the present invention. As a means for applying thermal energy at the time of thermal transfer, any conventionally known applying means can be used. For example, a thermal printer (for example,
By controlling the recording time with a recording device such as a video printer VY-100 manufactured by Hitachi, Ltd., it is possible to sufficiently achieve the intended purpose by applying heat energy of about 5 to 100 mJ / mm ^2. I can do it.

Next, the present invention will be described more specifically with reference to examples and comparative examples. In the following description, parts and% are based on weight unless otherwise specified.

Example 1 A synthetic paper (Yupo F
RG-150, thickness 150 μm, manufactured by Oji Oil Chemical Co., Ltd.), and applying and drying a coating solution having the following composition on one surface thereof with a bar coater at a ratio of 5.0 μm when dried to form a dye-receiving layer. Thus, a thermal transfer image-receiving sheet of the present invention was obtained. Coating liquid composition: polyester resin (Vylon 200, manufactured by Toyobo Co., Ltd.) 20.0 parts Ultrafine ZnO (ZnO-100, particle size: 50 to 150 mm, manufactured by Sumitomo Cement) 20.0 parts Catalyst cross-linkable silicone (X-62-) 1212, manufactured by Shin-Etsu Chemical Co., Ltd. 2.0 parts Platinum-based catalyst (PL-50T, manufactured by Shin-Etsu Chemical Co., Ltd.) 0.2 parts Methyl ethyl ketone / toluene (weight ratio 1/1) 160.0 parts On the other hand, formation of a dye layer having the following composition Preparing an ink composition for
A 6 μm-thick polyethylene terephthalate film whose back surface was heat-treated was applied by gravure printing to a dry coating amount of 1.0 g / m ² and dried to obtain a thermal transfer sheet used in the present invention.

Ink composition: Cyan dye of the following structural formula 3 parts Polyvinyl butyral resin (S-LEC BX-1, manufactured by Sekisui Chemical Co., Ltd.) 4 parts Methyl ethyl ketone 50 parts Toluene 43 parts

Embedded image

Thermal transfer test : The thermal transfer sheet and the thermal transfer image-receiving sheet of the present invention are superposed on each other with the respective dye layers and the dye-receiving surface facing each other. Applied voltage 11.0V,
An applied pulse width of 16 msec. 1mse from / line
c. After forming a cyan image by performing recording with a thermal head under the conditions of a step pattern of 6 lines / mm (33.3 msec./line) in the sub-scanning direction, the light resistance and the preservation of both are examined. The results in Table 1 were obtained. In addition, the evaluation method of each performance shown in Table 1 was performed as follows. (1) Light fastness test method The printed matter was measured at 400 KJ / m ² and 500 K with a xenon fadeometer (Ci-35A, manufactured by Atlas).
Irradiation was performed at J / m ² , and the change in optical density before and after irradiation was measured with an optical densitometer (RD-918, manufactured by Macbeth), and the residual ratio of optical density was calculated by the following equation. Residual rate (%) = {[optical density after irradiation] / [optical density before irradiation]} × 100 ◎; residual rate is 70% or more ○; residual rate is 60% or more and less than 70% △; residual rate is 50 % To less than 60% ×; Residual rate is 40% to less than 50% XX; Residual rate is less than 40%

(2) Storage Stability of Thermal Transfer Sheet Immediately after the thermal transfer image-receiving sheet was prepared by the above-described method, the sheet was printed and subjected to a light fastness test, and after storage in a 60 ° C. oven for 7 days, light fastness It was expressed as a change in the residual rate from the test. The results are shown in Table 1 below. ；: No change in residual rate was observed. X: The residual rate decreased. Comparative Example 1 A thermal transfer image-receiving sheet of Comparative Example was obtained in the same manner as in Example 1 except that the ultrafine ZnO particles were not used, and image formation and image evaluation were performed in the same manner as in Example 1. Comparative Example 2 An organic ultraviolet absorber (Tinuvin-P, manufactured by Ciba Geigy) was used instead of ultrafine ZnO in Example 1.
A thermal transfer image-receiving sheet of a comparative example was obtained in the same manner as in Example 1 except that 0 part was used, and image formation and image evaluation were performed in the same manner as in Example 1. Comparative Example 3 An organic ultraviolet absorber (Chemsorb 10, manufactured by Chemipro Kasei) was used instead of the ultrafine ZnO particles in Example 1.
A thermal transfer image-receiving sheet of a comparative example was obtained in the same manner as in Example 1 except that 0 part was used, and image formation and image evaluation were performed in the same manner as in Example 1.

Examples 2 to 4 The thermal transfer image-receiving sheet of the present invention was obtained in the same manner as in Example 1 except that the following inorganic ultrafine particles were used in place of the ultrafine ZnO particles in Example 1. Example 2 Ultrafine TiO ₂ (TTO-55, particle size 200-500 °, manufactured by Ishihara Sangyo) Example 3 Ultrafine ZnO (ZnO
-100, manufactured by Sumitomo Cement Co., Ltd. Example 4 Surface treated ultrafine TiO ₂ (TT
(Example: O-55, manufactured by Ishihara Sangyo Co., Ltd.) Example 5 The same base sheet as in Example 1 was coated with a coating liquid having the following composition by a bar coater and dried at a ratio of 4.0 μm when dried. Coating liquid composition: polyester resin (Vylon 200, manufactured by Toyobo Co., Ltd.) 20.0 parts Methyl ethyl ketone / toluene (weight ratio 1/1) 160.0 parts Next, a coating liquid having the following composition was applied to the surface of the above layer with a bar coater. The coating was dried and dried at a rate of 2.0 μm to obtain a thermal transfer image-receiving sheet of the present invention. Coating liquid composition; polyester resin (Vylon 200, manufactured by Toyobo Co., Ltd.) 10.0 parts Ultra-fine particle ZnO (ZnO-100, manufactured by Sumitomo Cement) 10.0 parts Catalyst cross-linkable silicone (X-62-1212, manufactured by Shin-Etsu Chemical Co., Ltd.) 2.0 parts Platinum-based catalyst (PL-50T, manufactured by Shin-Etsu Chemical Co., Ltd.) 0.2 parts Methyl ethyl ketone / toluene (weight ratio 1/1) 160.0 parts

Examples 6 to 8 The thermal transfer image-receiving sheet of the present invention was obtained in the same manner as in Example 5, except that the following inorganic ultrafine particles were used in place of the ultrafine ZnO particles in Example 5. Example 6: Ultra-fine particle TiO ₂ (TTO-55, manufactured by Ishihara Sangyo) Example 7: Surface-treated ultra-fine particle ZnO (ZnO
-100, manufactured by Sumitomo Cement) Example 8: Ultra-fine TiO ₂ (TT
(O-55, manufactured by Ishihara Sangyo) Comparative Example 4 In Example 5, an organic low molecular weight type ultraviolet absorber (Tinuvin-P, manufactured by Ciba Geigy) was used instead of the ultrafine ZnO, and the other conditions were the same as in Example 5. Thus, a thermal transfer image receiving sheet of a comparative example was obtained, and image formation and image evaluation were performed in the same manner as in Example 5. Comparative Example 5 A thermal transfer image-receiving sheet of a comparative example was obtained in the same manner as in Example 5 except that an organic low molecular weight type ultraviolet absorber (Chemisorb 10, manufactured by Chemipro Kasei) was used instead of the ultrafine ZnO particles. Image formation and image evaluation were performed in the same manner as in Example 5. Example 9 A coating solution having the following composition was applied to one surface of the same base sheet as in Example 1 using a bar coater and dried at a ratio of 4.0 μm when dried. Coating liquid composition; polyester resin (Vylon 200, manufactured by Toyobo Co., Ltd.) 10.0 parts Ultrafine ZnO (ZnO-100, manufactured by Sumitomo Cement) 10.0 parts Methyl ethyl ketone / toluene (weight ratio 1/1) 80.0 parts A coating solution having the following composition was applied to the surface of the layer by a bar coater at a ratio of 2.0 μm when dried, and dried to obtain a thermal transfer image-receiving sheet of the present invention. Coating liquid composition; polyester resin (GXP-23, manufactured by Toyobo Co., Ltd.) 10.0 parts Catalyst cross-linkable silicone (X-62-1212, manufactured by Shin-Etsu Chemical Co., Ltd.) 1.0 part Platinum-based catalyst (PL-50T, Shin-Etsu Chemical) Industrial) 0.1 part Methyl ethyl ketone / toluene (weight ratio 1/1) 90.0 parts

Examples 10 to 12 The following inorganic ultrafine particles and an organic ultraviolet absorber were used in place of the ultrafine ZnO particles in Example 9;
In the same manner as in the above, a thermal transfer image-receiving sheet of the present invention was obtained. Example 10: Ultrafine TiO ₂ (TTO-55,
Example 11: Ultrafine ZnO treated with surface treatment (Zn)
O- 12, manufactured by Sumitomo Cement) Example 12: Ultrafine TiO ₂ (T
TO-55, manufactured by Ishihara Sangyo)

Example 13 A coating solution having the following composition was applied to one surface of the same base sheet as in Example 1 by a bar coater and dried at a ratio of 4.0 μm when dried. Coating liquid composition: 100 parts of polyester resin (Vylon 200, manufactured by Toyobo Co., Ltd.) 100 parts of surface-treated TiO ₂ sol (SiO ₂ coating treatment) 100 parts Next, a coating liquid having the following composition was dried on the surface of the above layer with a bar coater. It was coated and dried at a ratio of 2.0 μm to obtain a thermal transfer image-receiving sheet of the present invention. Coating liquid composition; polyester resin (GXP-23, manufactured by Toyobo Co., Ltd.) 10.0 parts Catalyst cross-linkable silicone (X-62-1212, manufactured by Shin-Etsu Chemical Co., Ltd.) 1.0 part Platinum-based catalyst (PL-50T, Shin-Etsu Chemical) Industrial) 0.1 part Methyl ethyl ketone / toluene (weight ratio 1/1) 90.0 parts

[0025]

[Table 1]

[0026]

[Table 2] In particular, as shown in Examples 9 to 13, it is particularly effective when a layer having an ultraviolet absorbing ability is provided between the substrate sheet and the dye receiving layer instead of the receiving layer itself and the surface of the receiving layer. It is considered that the ultraviolet absorber layer blocks the ultraviolet ray that has once passed through the receiving layer and has reached the white base sheet, reflected on the base sheet and scattered into the receiving layer again. In addition, the spectral reflectance of the light reflected from the base material sheets of Examples 9 to 13 and Comparative Example 1 was measured using a Shimadzu automatic recording spectrophotometer UV-2.
An integrating sphere attachment device (inner die 60 mmφ, with a photomultiplier tube R928) was fitted into the sample chamber of the sample No. 40 and measured. The results are shown in Table 2 above.

[0027]

According to the present invention as described above, the dye-receiving layer contains an inorganic ultrafine ultraviolet absorber, or a layer containing the ultraviolet absorber is formed on the surface of the dye-receiving layer. By providing a layer having an ultraviolet absorbing ability between the dye receiving layer and the dye receiving layer, a heat transfer image excellent in light fastness is formed, and the ultraviolet absorbent does not bleed out to the surface during storage, and a white base It is possible to provide a thermal transfer image receiving sheet capable of blocking ultraviolet reflected light from the material sheet.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hitoshi Saito 1-1-1 Ichigaya Kagacho, Shinjuku-ku, Tokyo Dai Nippon Printing Co., Ltd. F-term (reference) 2H111 CA31

Claims (1)

[Claims] 1. A thermal transfer image receiving sheet having a dye receiving layer formed on at least one surface of a base sheet, a layer containing hexagonal ultrafine ZnO and / or ultrafine TiO ₂ on the dye receiving layer. A thermal transfer image-receiving sheet comprising: