JPH07195847A - Thermal image receiving sheet - Google Patents

Abstract

PURPOSE:To enhance the transfer or the lightfastness of an image excellent in sharpness with high sensitivity and to suppress retransfer properties by forming the image receiving layer supported on a base material from a mixed resin of saturated polyester and a vinyl chloride/vinyl acetate copolymer specified in its mixing ratio. CONSTITUTION:A thermal image receiving sheet 1 is constituted of an image receiving layer 3 performing recording corresponding to image data by heating and transferring the sublimable dye in the colorant layer of the sheet l and the base material 2 supporting the image receiving layer 3. In this case, the image receiving layer 3 is formed from a mixed resin of saturated polyester and a vinyl chloride/vinyl acetate copolymer specified in its mixing ratio so that the saturated polyester is 90-100 pts.wt. per 100 pts.wt. of the copolymer. By this constitution, the transfer recording of an image excellent in sharpness is enabled with high sensitivity and the light fastness of a transferried image is enhanced and retransfer properties are suppressed.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a heat transfer sheet,
More specifically, the present invention relates to a heat transferable sheet for recording an image by heat-transferring a sublimable dye in a color material layer of a heat transfer sheet according to image information.

[0002]

2. Description of the Related Art In recent years, as a recording method for recording an image such as a photograph directly from an image on a CRT display, the thermal transfer sheet is heated by a thermal head whose heat generation is controlled by an electric signal and the color of the thermal transfer sheet is changed. A thermal transfer recording system is used in which image information is recorded by transferring a sublimable dye in a material layer onto a thermal transfer sheet.
This thermal transfer recording system has been attracting attention as a system capable of transferring and recording a color image having continuous changes in color tone by performing overlapping recording of cyan, magenta, and yellow. As a thermal transfer recording sheet used in the thermal transfer recording method, conventionally, a substrate having a surface coated with a polyester resin to form an image receiving layer on which a sublimable dye is transferred is used.

[0003]

However, the conventional heat-transferable sheet has poor light resistance of the transferred image, and the sharpness of the transferred image is lowered during storage, so that a beautiful image can be maintained for a long time. There was a flaw that I could not do. It is considered that this is because the dye is transferred to the vicinity of the surface of the image-receiving layer of the heat-transferred sheet in the sublimation transfer method in which energy is applied in a short time to transfer the dye by sublimation transfer by the thermal head .

[0004]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have found that when the image receiving layer is composed of a vinyl chloride-vinyl acetate copolymer, the light resistance can be remarkably improved. We found that when the image receiving layer was composed of only vinyl chloride-vinyl acetate copolymer, the fixability of the transferred dye was poor, and the paper was transferred to the image receiving layer surface of the heat transferable sheet after transfer to transfer. There is a problem in that the dye that is transferred is re-transferred to paper or the like, and there is a problem in that the recording sensitivity is inferior to that in the case where the image receiving layer is made of polyester alone. Therefore, as a result of further diligent research conducted by the present inventors,
The present invention has been completed by finding that the above-mentioned various problems can be solved by forming the image receiving layer from a mixed resin of saturated polyester and vinyl chloride-vinyl acetate copolymer.

That is, the present invention has an image receiving layer on which a sublimable dye in a color material layer of a thermal transfer sheet is transferred by heating and recording is performed according to image information, and a base material carrying the image receiving layer. In the thermal transfer sheet, the image receiving layer is made of a mixed resin of saturated polyester and vinyl chloride-vinyl acetate copolymer, and the mixing ratio of the saturated polyester and vinyl chloride-vinyl acetate copolymer is 100.
The gist of the heat-transferable sheet is that saturated polyester is 900 to 100 parts by weight with respect to parts by weight.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a heat-transferable sheet 1 of the present invention, which comprises a base material 2 and an image-receiving layer 3 provided on the base material 2.

As the base material 2, coated paper, glassine paper,
Examples of the flexible sheet or film include sulfuric acid paper, highly sized paper, plastic film such as polyester film, and so-called synthetic paper mainly composed of polypropylene having microvoids. The thickness of these base materials 2 is usually 50 to 400 μm, especially 70 to 170 μm.
m is preferred.

In the present invention, the image receiving layer 3 is composed of a mixed resin of saturated polyester and vinyl chloride-vinyl acetate copolymer. The saturated polyester and vinyl chloride
The mixing ratio with the vinyl acetate copolymer is 90 parts by weight of saturated polyester per 100 parts by weight of vinyl chloride-vinyl acetate copolymer.
It is 0 to 100 parts by weight.

As the saturated polyester, for example, Byron 200, Byron 290, Byron 600 and the like (all manufactured by Toyobo), KA-1038C (manufactured by Arakawa Kagaku), TP22.
0, TP235 (above, manufactured by Nippon Gosei) or the like is used.

The vinyl chloride-vinyl acetate copolymer has a vinyl chloride content of 85 to 97 wt% and a degree of polymerization of 200 to 80.
0 is preferable. The vinyl chloride-vinyl acetate copolymer is not necessarily a copolymer of only a vinyl chloride component and a vinyl acetate component, and may contain a vinyl alcohol component, a maleic acid component, etc. within a range not hindering the object of the present invention. It may be. Examples of such vinyl chloride-vinyl acetate copolymers include S-REC A, S-REC C, S-REC M (above, manufactured by Sekisui Chemical Co., Ltd.), and vinylite VA.
GH, Vinyl Light VYHH, Vinyl Light VMCH, Vinyl Light VYHD, Vinyl Light VYLF, Vinyl Light VY
NS, Vinyl Light VMCC, Vinyl Light VMCA, Vinyl Light VAGD, Vinyl Light VERR, Vinyl Light VR
OH (above, manufactured by Union Carbide), Denka Vinyl 1000GKT, Denka Vinyl 1000L, Denka Vinyl 1000CK, Denka Vinyl 1000A, Denka Vinyl 1000LK ₂ , Denka Vinyl 1000AS, Denka Vinyl 1000MT ₂ , Denka Vinyl 1000CSK,
Denka Vinyl 1000CS, Denka Vinyl 1000G
K, Denka Vinyl 1000 GSK, Denka Vinyl 100
0GS, Denka Vinyl 1000LT ₃ , Denka Vinyl 1
000D, Denka vinyl 1000W (above, manufactured by Denki Kagaku Kogyo) and the like.

In the present invention, for the purpose of improving the whiteness of the image-receiving layer 3 to further enhance the sharpness of the transferred image, imparting writability to the surface of the heat-transferred sheet, and preventing retransfer of the transferred image. A white pigment can be added to the image receiving layer 3. The addition amount of the white pigment is preferably 5 to 50 parts by weight with respect to 100 parts by weight of the resin constituting the image receiving layer 3.
As the white pigment, titanium oxide, zinc oxide, kaolin clay and the like are used, and these can be used as a mixture of two or more kinds. Anatase type titanium oxide and rutile type titanium oxide can be used as the titanium oxide, and examples of the anatase type titanium oxide include KA-10 and KA-2.
0, KA-15, KA-30, KA-35, KA-6
0, KA-80, KA-90 [All are titanium industry
Manufactured by K.K., etc., and as rutile type titanium oxide, KR-310, KR-380, KR-460, KR-4.
80 (all manufactured by Titanium Industry Co., Ltd.) and the like.

Further, in order to further enhance the light resistance of the transferred image, an ultraviolet absorber and / or a light stabilizer can be added to the image receiving layer 3. Examples of the ultraviolet absorber include 2- (2'-hydroxy-3,3'-di-t-butylphenyl) -5-chlorobenzotriazole and 2- (2
-Hydroxy-3,5-di-t-amylphenyl) -2
H-benzotriazole, 2- (2'-hydroxy-
3'-t-butyl-5'-methylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-
3 ', 5'-t-butylphenyl) -benzotriazole, 2- (2'-hydroxy-3', 5'-di-t-amylphenyl) benzotriazole and the like can be mentioned. Examples of the light stabilizer include distearyl pentaerythritol diphosphite, bis (2,4-di-t-butylphenyl) pentaerythritol diphosphite, dinonylphenyl pentaerythritol diphosphite, cyclic neopentanetetraylbis Octadecyl phosphite), tris (nonylphenyl) phosphite, 1- [2- [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionyloxy] ethyl] -4- [3- (3 , 5-Di-t-butyl-4-hydroxyphenyl) propionyloxy] -2,2
6,6-tetramethylpiperidine and the like can be mentioned. The addition amount of these ultraviolet absorber and light stabilizer is preferably 0.05 to 10 parts by weight and 0.5 to 3 parts by weight, respectively, with respect to 100 parts by weight of the resin constituting the image receiving layer 3.

In the heat transferable sheet 1 of the present invention, a releasing agent may be contained in the image receiving layer 3 in order to improve the releasability from the heat transfer sheet. Examples of the release agent include solid waxes such as polyethylene wax, amide wax and Teflon powder; fluorine-based and phosphoric acid ester-based surfactants; silicone oil and the like, with silicone oil being preferred. As the silicone oil, oily ones can be used, but curable ones are preferable. As a curable silicone oil, a reaction curable type,
Examples include photo-curing type and catalyst-curing type, and reaction-curing type silicone oil is particularly preferable. The reaction-curable silicone oil is preferably a reaction-cured amino-modified silicone oil and an epoxy-modified silicone oil, and the amino-modified silicone oil is KF-3.
93, KF-857, KF-858, X-22-368
0, X-22-3801C [above, Shin-Etsu Chemical Co., Ltd.
Manufactured by K.K., etc., and epoxy modified silicone oils include KF-100T, KF-101, KF-60-16.
4, KF-103 [above, manufactured by Shin-Etsu Chemical Co., Ltd.] and the like. Also, as the catalyst-curable or photocurable silicone oil, KS-705F-PS, KS-705
F-PS-1, KS-770-PL-3 [Catalyst-curable silicone oil: manufactured by Shin-Etsu Chemical Co., Ltd.], KS
-720, KS-774-PL-3 [above, photocurable silicone oil: manufactured by Shin-Etsu Chemical Co., Ltd.] and the like. The addition amount of these curable silicone oils is preferably 0.5 to 30 wt% of the resin constituting the image receiving layer.

Further, as shown in FIG. 2, a part of the surface of the image receiving layer 3 is dissolved or dispersed in a suitable solvent and applied, and then dried to form the release agent layer 4. It can also be provided. As the release agent constituting the release agent layer 4, a reaction-cured product of the amino-modified silicone oil and the epoxy-modified silicone oil described above is particularly preferable.
The release agent layer 4 has a thickness of 0.01 to 5 μm, particularly 0.05 to
2 μm is preferable. The release agent layer 4 may be provided on a part of the surface of the image receiving layer 3 as shown in FIG. 2 or may be provided on the entire surface. Dot impact recording, heat-sensitive melting transfer recording, recording with a pencil, etc. can be performed on the portion not provided, and the release agent layer 4
The sublimation transfer recording method and the other recording method can be performed in combination, such as performing sublimation transfer recording on a portion where the release agent layer 4 is provided and recording by another recording method on a portion where the release agent layer 4 is not provided. it can.

The heat-transferable sheet 1 of the present invention can be provided with a cushion layer 5 between the substrate 2 and the image receiving layer 3 as shown in FIG. 3. When the cushion layer 5 is provided, noise is reduced and image information can be dealt with. The recorded image can be transferred and recorded with good reproducibility. Examples of the material forming the cushion layer 5 include urethane resin, acrylic resin, ethylene resin, butadiene rubber, and epoxy resin. The thickness of the cushion layer 5 is preferably 5 to 25 μm.

As shown in FIG. 4, the thermal transfer sheet 1 of the present invention having the above-mentioned structure is such that the color material layer 7 of the thermal transfer sheet 6 and the image receiving layer 3 of the thermal transfer sheet 1 are in contact with each other. And the transfer sheet 6 after being heated with a thermal head or the like from the side of the supporting material 8 of the thermal transfer sheet.
By peeling off, the sublimable dye in the color material layer 7 is transferred to the image receiving layer 3 of the heat transferable sheet 1, and an image corresponding to the image information is recorded on the heat transferable sheet 1. The sublimable dye used for the thermal transfer sheet 6 has a molecular weight of about 150 to 6
The disperse dyes having a relatively low molecular weight of about 00, oil dyes, certain basic dyes, or intermediates that can be converted to these dyes are mentioned. These sublimable dyes include thermal transfer temperature, thermal transfer efficiency, hue and color rendering properties. It is selected and used in consideration of weather resistance and the like.

The color material layer 7 of the thermal transfer sheet 6 is formed by dispersing the sublimable dye in a synthetic resin binder and applying it to the surface of the support material 8. Such synthetic resin binders include cellulosic resins such as ethyl cellulose, hydroxyethyl cellulose, ethyl hydroxyethyl cellulose, hydroxypropyl cellulose, methyl cellulose, cellulose acetate, cellulose acetate butyrate; polyvinyl alcohol, polyvinyl vinyl butyral, polyvinyl pyrrolidone, polyester, polyvinyl acetate. , Vinyl resins such as polyacrylamide, and the like. Among these resins, polyvinyl butyral with excellent acid resistance,
Alternatively, a cellulosic resin is preferable. Examples of the base material 8 of the thermal transfer sheet 6 include a polyester film, a polystyrene film, a polysulfone film, a polyvinyl alcohol film, a cellophane film, and the like, and the polyester film is particularly preferable from the viewpoint of heat resistance. The substrate 8 has a thickness of 0.5 to 50 μm, especially 3 to
10 μm is preferable.

The thermal transfer sheet 6 is heated from the side of the supporting material 8 by a heating means such as a thermal head, and the surface of the supporting material 8 to be heated is provided with a slipping layer containing a lubricant such as wax or a release agent. Preferably, it is possible to prevent fusion between the heating means such as a thermal head and the support material 8.

The present invention will be described in more detail with reference to specific examples. Example 1 Polyethylene terephthalate film having a thickness of 6 μm and subjected to corona discharge treatment on one side (Toyobo: S-PET)
Is used as a support material, and the color material layer composition having the following composition is applied to the surface of the support material subjected to corona discharge treatment by wire bar coating so that the thickness when dried is 1 μm to form a color material layer. Formed, and silicone oil (X-41-4
(003A: made by Shin-Etsu Silicone Co., Ltd.) was dropped with a dropper, and then spread over the entire surface to form a slipping layer to obtain a thermal transfer sheet. [Color material layer composition] 4 parts by weight of disperse dye (Nippon Kayaku: Kayaset Blue 136) 5 parts by weight of ethyl hydroxyethyl cellulose (Hercules) ・ 40 parts by weight of toluene ・ 40 parts by weight of methyl ethyl ketone ・ 10 parts by weight of dioxane On the other hand, 150 μm synthetic paper (manufactured by Oji Yuka: YUPO-F
PG-150) as a base material, an image-receiving layer composition having the following composition is applied to the surface by wire bar coating so that the thickness when dried is 4 μm, and tentatively dried with a dryer, and then in an oven at 100 ° C. It was dried for 30 minutes to form an image receiving layer, which was used as a heat-transferable sheet. [Image Receiving Layer Composition] -Byron 200 (Toyobo Saturated Polyester: Tg = 67 ° C) 5.3 parts by weight-Byron 290 (Toyobo Saturated Polyester: Tg = 77 ° C) 5.3 parts by weight-Vinylite VYHH (Union Carbide Made vinyl chloride-vinyl acetate copolymer) 4.5 parts by weight KF-393 (Shin-Etsu Silicone amino-modified silicone oil) 1.1 parts by weight X-22-343 (Shin-Etsu Silicone epoxy-modified silicone oil) 1. 1 part by weight Toluene 30 parts by weight Methyl ethyl ketone 30 parts by weight Cyclohexanone 22 parts by weight The thermal transfer sheet and the thermal transfer transfer sheet are superposed so that the color material layer and the image receiving layer are in contact with each other, and the thermal transfer sheet is thermally supported from the support material side. Output of the thermal head by the head 1
The cyan disperse dye in the color material layer of the thermal transfer sheet was transferred to the image receiving layer of the thermal transfer sheet by heating with W / dot, pulse width of 0.3 to 0.45 m / sec and dot density of 3 dots / mm. A clear cyan image was transferred. Next, a light resistance test and a heat and humidity resistance test of the image transferred to the heat transfer sheet were performed under the following conditions. Table 1 shows the results of the measurement of the fading rate of the image after the light resistance test and the results of the hunter whiteness of the heat-transferred sheet before printing, after the light resistance test, and after the heat and humidity resistance test measured and compared. The fading rate is represented by a percentage obtained by measuring the image density immediately after printing and the image density after the test with a Macbeth reflection type densitometer (RD-918) and dividing the image density after the test by the image density immediately after the printing. Further, a dry high-quality paper for electrostatic copying was superposed on the image receiving layer side of the heat-transferred sheet on which the image was transferred, and after applying a pressure of 30 g / cm ² and leaving it in an oven at 60 ° C. for 3 days,
The image density transferred from the oven and retransferred to the fine paper for dry electrostatic copying was measured with the same Macbeth densitometer. The results are also shown in Table 1. -Light resistance test: exposed for 10 hours under conditions based on JIS L0842. -Heat and humidity resistance test: It was kept for 100 hours in an atmosphere of 40 ° C and humidity of 90%.

Example 2 An image-receiving layer composition having the following composition was coated on the same substrate as in Example 1 by wire bar coating to give a dry thickness of 10 μm.
And the coating solution was dried to form an image receiving layer. [Image Receiving Layer Composition] -Byron 200 (Toyobo Saturated Polyester: Tg = 67 ° C) 5.3 parts by weight-Byron 290 (Toyobo Saturated Polyester: Tg = 77 ° C) 5.3 parts by weight-Vinylite VYHH (Union Carbide Made vinyl chloride-vinyl acetate copolymer) 4.5 parts by weight Toluene 30 parts by weight Methyl ethyl ketone 30 parts by weight Cyclohexanone 22 parts by weight Next, a part of the surface of the image receiving layer is coated with a release agent composition having the following composition. The coating has a dry thickness of 0.5
It was applied so as to have a thickness of μm and dried to form a release agent layer to obtain a heat transfer sheet. When the transfer was performed under the same conditions using the same thermal transfer sheet as in Example 1 on the portion of the thermal transfer sheet provided with the release agent layer, a clear cyan color was transferred. In addition, it was possible to perform recording with a dot impact method, a heat-sensitive fusion transfer method, a pencil, etc. on the portion where the release agent layer is not provided. Next, a light resistance test, a heat resistance and humidity resistance test, and a retransfer property test of this heat-transferred sheet were performed under the same conditions as in Example 1. The results are shown in Table 1.

Example 3 On the same substrate as in Example 1, an image receiving layer composition having the following composition was applied by wire bar coating to a dry thickness of 4 μm and dried to obtain a heat transferable sheet. [Image Receiving Layer Composition] -Byron 200 (Toyobo Saturated Polyester: Tg = 67 ° C) 5.3 parts by weight-Byron 290 (Toyobo Saturated Polyester: Tg = 77 ° C) 5.3 parts by weight-Vinylite VYHH (Union Carbide Made vinyl chloride-vinyl acetate copolymer) 4.5 parts by weight Titanium oxide (KA-10 manufactured by Titanium Industry Co., Ltd.) 1.5 parts by weight KF-393 (amino-modified silicone oil manufactured by Shin-Etsu Silicone) 1.1 parts by weight X-22-343 (Epoxy-modified silicone oil manufactured by Shin-Etsu Silicone) 1.1 parts by weight Toluene 30 parts by weight Methyl ethyl ketone 30 parts by weight Cyclohexanone 22 parts by weight A thermal transfer sheet similar to that of Example 1 was used as the thermal transfer sheet. When the transfer was performed under the same conditions, the cyan color was clearly transferred. Then, a light resistance test, a heat resistance and humidity resistance test, and a retransfer property test of this heat-transferred sheet were performed under the same conditions as in Example 1. The results are shown in Table 1.

Example 4 An image-receiving layer composition having the following composition was coated on a substrate similar to that of Example 1 by wire bar coating so that the thickness when dried was 4 μm, and dried to obtain a heat-transferable sheet. [Image Receiving Layer Composition] -Byron 200 (Toyobo Saturated Polyester: Tg = 67 ° C) 5.3 parts by weight-Byron 290 (Toyobo Saturated Polyester: Tg = 77 ° C) 5.3 parts by weight-Vinylite VYHH (Union Carbide Made vinyl chloride-vinyl acetate copolymer) 4.5 parts by weight-2,-(2'-hydroxy-5'-t octylphenyl) benzotriazole (ultraviolet absorber) 0.8 parts by weight-KF-393 (Shin-Etsu) Silicone amino-modified silicone oil) 1.1 parts by weight X-22-343 (Shin-Etsu Silicone epoxy-modified silicone oil) 1.1 parts by weight Toluene 30 parts by weight Methyl ethyl ketone 30 parts by weight Cyclohexanone 22 parts by weight This heat transfer The same thermal transfer sheet as in Example 1 was used as the sheet, and transfer was performed under the same conditions. C, the cyan color was clearly transferred. Then, a light resistance test, a heat resistance and humidity resistance test, and a retransfer property test of this heat-transferred sheet were performed under the same conditions as in Example 1. The results are shown in Table 1.

Example 5 A cushion layer composition having the following composition was coated on the same substrate as in Example 1 by wire bar coating to give a dried thickness of 1
A cushion layer was formed by coating so as to have a thickness of 0 μm and drying. [Cushion layer composition] Elvalloy 742 (ethylene resin: Tg = -32 [deg.] C.) 15.0 parts by weight Toluene 42.5 parts by weight Methyl ethyl ketone 42.5 parts by weight Next, on the cushion layer as in Example 1. The image-receiving layer composition of No. 4 is coated with a wire bar to have a dry thickness of 4
The coated layer was dried to a thickness of μm and dried to form an image-receiving layer, which was used as a heat-transferable sheet. Example 1 was applied to this heat transfer sheet.
When the transfer was performed under the same conditions using the same thermal transfer sheet as described above, a clear cyan color was transferred. Further, the obtained image was excellent in image quality with little noise and good reproducibility of image information. Then, a light resistance test, a heat resistance and humidity resistance test, and a retransfer property test of this heat-transferred sheet were performed under the same conditions as in Example 1. The results are shown in Table 1.

Comparative Example 1 The same image-receiving layer composition as in Example 1 except that the vinyl chloride-vinyl acetate copolymer was not contained on the same substrate as in Example 1 was dried by wire bar coating. 5 μm
It was applied and dried to obtain a heat transfer sheet.
The same thermal transfer sheet as in Example 1 was used for this thermal transfer sheet, and transfer was performed under the same conditions. Then, a light resistance test, a heat resistance and humidity resistance test, and a retransfer property test of this heat-transferred sheet were performed under the same conditions as in Example 1. The results are shown in Table 1.

[0025]

[Table 1]

[0026]

As described above, in the heat transferable sheet of the present invention, the image receiving layer to which the sublimable dye in the color material layer of the heat transfer sheet is transferred is a mixture of saturated polyester and vinyl chloride-vinyl acetate copolymer. By using a resin and mixing ratio of the above resin to 100 to 100 parts by weight of vinyl chloride-vinyl acetate copolymer and 900 to 100 parts by weight of saturated polyester, transfer recording of an image with high sensitivity and excellent sharpness can be achieved. In addition to being possible, the retransferability of the transferred image is small, and therefore, even if the heat transfer sheet is overlapped with the paper or the like after the transfer, the sublimable dye may be retransferred to the paper or the like to cause contamination. Absent. In addition, since the image transferred to the image receiving layer has excellent light resistance, the color loss of the transferred image is extremely small, and the sharpness of the image can be maintained almost the same as that immediately after the transfer for a long period of time. In particular, in the present invention, the mixing ratio of the resin of the receiving layer is set to 900 to 100 parts by weight of the saturated polyester to 100 parts by weight of the vinyl chloride-vinyl acetate copolymer, so that the light resistance may be lowered or retransfer after transfer may occur. It is possible to reliably and stably exhibit the effect of not having these.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of one embodiment of a heat transferable sheet of the present invention.

FIG. 2 is a vertical cross-sectional view of another embodiment of the heat transferable sheet of the present invention.

FIG. 3 is a longitudinal sectional view of still another embodiment of the heat transferable sheet of the present invention.

FIG. 4 is a vertical cross-sectional view showing a state in which a thermal transfer sheet and a thermal transfer sheet are superposed and transferred to the thermal transfer sheet.

[Explanation of symbols]

 1 Thermal Transfer Sheet 2 Base Material 3 Image Receiving Layer 6 Thermal Transfer Sheet 7 Color Material Layer

Claims (1)

[Claims] 1. A thermal transfer sheet having an image receiving layer on which a sublimable dye in a color material layer of a thermal transfer sheet is transferred by heating to record according to image information, and a base material carrying the image receiving layer. , The image receiving layer is saturated polyester and vinyl chloride-
It is made of a mixed resin with a vinyl acetate copolymer, and the mixing ratio of the saturated polyester and the vinyl chloride-vinyl acetate copolymer is 900 to 100 parts by weight of the saturated polyester with respect to 100 parts by weight of the vinyl chloride-vinyl acetate copolymer. A heat transfer sheet characterized by the above.