JPH06316168A - Thermal transfer sheet - Google Patents

Abstract

PURPOSE:To easily perform thermal transfer even by low energy and to make thermal sensitivity excellent by providing a colorant layer formed from a compsn. containing disperse yellow and a binder on one surface of a base material. CONSTITUTION:A colorant layer formed from a compsn. containing disperse yellow 201 and a binder is provided on one surface of a base material. As the base material, condenser paper or a plastic film such as a polyester film is used. Since the disperse yellow 201 is used as a dye and dissolved in the binder, the energy for overcoming the mutual action between the dye and the binder becomes unnecessary when the dye is sublimed and transferred and heat sensitivity is made excellent. The wt. ratio of the dye and binder in the colorant layer is desirably dye/binder >=0.3 and in the case of >2.3, the preserbvability of the dye in the binder is insufficient.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a thermal transfer sheet.

[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. A thermal transfer recording system is used in which image information is recorded by transferring a sublimable dye in a color material layer onto a thermal transfer sheet.

This thermal transfer recording system has attracted attention as a system capable of transferring and recording a color image having a continuous change in color tone by superposing and recording the three primary colors of cyan, magenta and yellow.

As a thermal transfer sheet used in the above thermal transfer recording system, one having a coloring material layer formed by coating a binder containing a sublimable dye on a base material has been conventionally used.

[0005]

However, in the conventional sublimation transfer paper for cloth, the dye is dispersed in the binder. Therefore, in order to sublimate the dye, the interaction between the dye molecules and the dye molecule to the binder are required. Energy must be given to overcome the interaction between them, and high heat energy is required to sublimate and transfer the dye, and as a result,
There is a problem that the thermal sensitivity at the time of thermal transfer is lowered.

The present invention has been made in view of the above points,
It is an object of the present invention to provide a thermal transfer sheet that solves the above conventional problems.

[0007]

That is, the thermal transfer sheet of the present invention has a dispersion yellow 201 on one surface of a substrate.
It is characterized by having a coloring material layer formed of a composition containing a binder and a binder.

The base material of the thermal transfer sheet of the present invention is a plastic such as condenser paper, polyester film, polyethylene naphthalate film, polystyrene film, polysulfone film, polyimide film, polyvinyl alcohol film, cellophane, aramid (aromatic polyamide) film. A film is used, and the thickness is 2 to 50 μm, preferably 2 to 12 μm. These plastic films are preferable because they have a smooth surface and high mechanical strength, and among them, it is preferable to use a polyester film or an aramid film.

A color material layer is provided on one surface of the base material, and the thermal transfer sheet of the present invention has a color material layer formed of a composition containing Disperse Yellow 201 as a dye and a binder. In the present invention, since the dye is dissolved in the binder, when the dye is sublimated and transferred, the interaction between the dye molecules and the dye molecule, like a conventional thermal transfer sheet in which the dye is present in the binder in a dispersed state,
Energy for overcoming the interaction between the binders is not required, and there is an advantage that the thermal sensitivity is excellent.

In order to obtain a multicolor transfer image, the yellow transfer image from the yellow color material layer using Disperse Yellow 201 as a dye contains a color material layer containing a cyan dye and a magenta dye. From the color material layer, cyan and magenta dyes are sublimated and transferred, and recording is repeated. Further, in order to obtain a black transferred image, it is necessary that the coloring material layer contains a black dye. The cyan, magenta, and black dyes are preferably sublimable disperse dyes, sublimable oil-soluble dyes, sublimable basic dyes, etc., and have a molecular weight of 150 to 800,
It is preferably 350 to 700. These dyes are selected in consideration of sublimation temperature, hue, weather resistance, solubility in ink or binder, and the like, but are preferably dissolved in the binder.

Examples of cyan, magenta and black dyes include C.I. I. (Abbreviation of color index; the same applies below) Disperse Blue 24, 56, 14, 14, 301, 334, 165, 19, 19
2, ibid 87, ibid 287, ibid 154, ibid 26; I. Disperse Red 135, 146, 59, 1, 1, 73, 60, 167; I. Disperse Violet 4, ibid 13, ibid 36, ibid 56, ibid 31; C.I. I.
Solvent Violet 13; C.I. I Solvent Black 3; C.I. I. Solvent Green 3; C.I. I Solvent Blue 70, 35, 63, 36, 50, 4
9, ibid 111, ibid 105, ibid 97, ibid 11; I. Solvent Red 135, 81, 18, 18, 25, 1
9, 23, 24, 143, 146, 182, and the like.

As the binder used for forming the color material layer together with the above dye, a cellulose resin such as ethyl cellulose, hydroxyethyl cellulose, ethyl hydroxyethyl cellulose, hydroxypropyl cellulose, methyl cellulose, cellulose acetate, cellulose acetate butyrate, polyvinyl alcohol, polyvinyl butyral. Vinyl resins such as polyvinylpyrrolidone, polyester, polyvinyl acetate, and polyacrylamide can be used.

The weight ratio of the dye and the binder in the color material layer is preferably dye / binder ≧ 0.3. When the dye / binder <0.3, the print density and thermal sensitivity are insufficient. If the dye / binder> 2.3, the retention of the dye in the binder is insufficient and the storage stability of the thermal transfer sheet is deteriorated. Therefore 2.3 ≧ dye /
The binder is preferably ≧ 0.3, more preferably 1.5 ≧ dye / binder ≧ 0.55. The color material layer can be formed by applying a composition comprising the above dye and a binder onto a substrate.

It should be noted that it is possible to perform a fusion preventing treatment with a thermal head on the substrate surface side of the thermal transfer sheet.

The heat transfer sheet to be used in combination with the heat transfer sheet is a receiving layer for transferring a sublimable dye of the heat transfer sheet by heat and forming a record according to image information, and a substrate carrying the receiving layer. It is possible to use the one composed of and. In addition, a cushion layer is preferably provided between the receiving layer and the substrate in order to further improve the sharpness of the transferred image.

As the base material of the heat transfer sheet, synthetic paper (polyolefin type, polystyrene type, etc.), high quality paper,
Art paper, coated paper, cast coated paper, wallpaper backing paper, synthetic resin or emulsion impregnated paper, synthetic rubber latex impregnated paper, synthetic resin internal paper, paperboard or natural fiber paper such as cellulose fiber paper, polyolefin, polyvinyl chloride , Polyethylene terephthalate, polystyrene,
Films or sheets of various plastics such as polymethacrylate and polycarbonate can be used.

As the base material of the heat transferable sheet,
Among them, the synthetic paper is preferable because it has a microvoid layer having a low thermal conductivity (in other words, a high heat insulating property) on its surface. Further, a laminate having any combination of the above items 1 to 3 can also be used. Examples of typical laminates include a laminate of cellulose fiber paper and synthetic paper, or cellulose fiber paper and a plastic film or sheet. Among them, the laminated body of cellulose fiber paper and synthetic paper compensates for the thermal instability (expansion and contraction) of synthetic paper, and can exhibit high printing sensitivity due to the low thermal conductivity of synthetic paper. Good. In order to balance the front and back of the laminate in this combination, it is preferable to use a three-layer laminate of synthetic paper, cellulose fiber paper, and synthetic paper.
Curling due to printing can be reduced.

The synthetic paper used for the above laminate is usually
Any material can be used as long as it can be used as the base material of the heat transferable sheet, but particularly synthetic paper provided with a paper-like layer having fine pores (for example, commercially available synthetic paper, YUPO: Oji Yuka Synthetic). Paper) is preferable. The fine voids in the paper-like layer can be formed, for example, by stretching a synthetic resin containing a fine filler. The thermal transfer sheet configured by using the synthetic paper provided with the paper-like layer having fine pores has a high image density of the transfer image formed by thermal transfer,
There is an effect that the image is not blurred. It is considered that this is because the fine pores have a heat insulating effect, the thermal energy efficiency is good, and the cushioning property of the fine pores contributes to the receiving layer provided on the synthetic paper. It is also possible to provide a paper-like layer containing fine pores directly on the surface of a core material such as cellulose fiber paper.

A plastic film may be used in addition to the cellulose fiber paper in the above laminate, and further,
A laminate of the above cellulose fiber paper and a plastic film can also be used. The thickness of the substrate is usually preferably 30 to 200 μm.

Examples of the method for sticking the synthetic paper and the cellulose fiber paper include sticking using a conventionally known adhesive, sticking using an extrusion laminating method, and sticking by heat bonding. Examples of the method for adhering the plastic film and the plastic film include a laminating method and a calendering method, which also serve to form the plastic film. The above-mentioned sticking means is appropriately selected according to the material to be stuck to the synthetic paper.

Specific examples of the adhesive include ethylene /
Examples include vinyl acetate copolymers, emulsion adhesives such as polyvinyl acetate, water-soluble adhesives such as polyesters containing a carboxyl group, and adhesives for lamination, such as polyurethane-based and acrylic-based organic solvent solutions. Examples include adhesives such as types.

The receiving layer of the thermal transfer sheet is made of a material capable of receiving the image of the dye transferred from the thermal transfer sheet and maintaining the image of the received dye. As the material for forming the receiving layer, any material can be used as long as it has been conventionally used for the receiving layer of this type of heat-transferred sheet. For example
The synthetic resins (a) to (e) can be used alone or in combination of two or more.

(A) A resin having an ester bond. For example, polyester resin, polyacrylate resin, polycarbonate resin, polyvinyl acetate resin, styrene acrylate resin, vinyl toluene acrylate resin. (b) Resin having a urethane bond. For example, polyurethane resin. (c) A resin having an amide bond. Polyamide resin (nylon). (d) A resin having a urea bond. For example, urea resin. (e) Other resins having a highly polar bond. For example, polycaprolactone resin, polystyrene resin, polyvinyl chloride resin, polyacrylonitrile resin, etc.

The receiving layer is a saturated polyester and vinyl chloride /
It can be composed of a mixture with a vinyl acetate copolymer, in which case the vinyl chloride / vinyl acetate copolymer has a vinyl chloride component content of 85 to 97% by weight and a polymerization degree of 20.
It is preferably about 0 to 800. As the vinyl chloride / vinyl acetate copolymer, those containing vinyl alcohol, maleic acid, etc. in addition to vinyl chloride and vinyl acetate as comonomer components can also be used.

When the receptive layer is made of polystyrene resin, homopolymer or copolymer of styrene resin such as styrene, α-methylstyrene, vinyltoluene, etc., or these styrene monomer and other monomers, Examples thereof include copolymers with acrylic or methacrylic monomers such as acrylic acid ester, methacrylic acid ester, acrylonitrile and methacrylonitrile, and maleic anhydride.

In the receiving layer, the whiteness of the receiving layer is improved to enhance the sharpness of the transferred image, the writability is imparted to the surface of the heat transfer sheet, and the retransfer of the transferred image is prevented. A white pigment can be added to. Further, when a white pigment is added to the receiving layer, it is possible to transfer an image having higher sharpness and excellent heat resistance and moisture resistance. Further, the color (yellowing) peculiar to the resin such as the receiving layer and the cushion layer laminated on the base material can prevent the whiteness and gloss of the base material from being impaired. In particular, the base material is natural paper such as cast coated paper. Has a large whiteness, gloss, smoothness, and the like as compared with synthetic paper and the like, so that this effect is great.

Titanium oxide, zinc oxide, kaolin clay and the like are used as the white pigment, and these may be used as a mixture of two or more kinds. 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 forming the receiving layer.

An ultraviolet absorber may be added to the receiving layer. By adding the ultraviolet absorber, the light resistance of the dye transferred from the thermal transfer sheet is further improved. Examples of the ultraviolet absorber include benzophenone type, hindered amine type, and benzotriazole type. The addition amount of the ultraviolet absorber is about 0.05 to 5 parts by weight with respect to 100 parts by weight of the resin constituting the receiving layer.

In order to enhance the releasability of the heat transfer sheet and the heat transfer sheet after the transfer is carried out by superposing the heat transfer sheet and the heat transfer sheet on top of each other, a release agent is contained in the receiving layer of the heat transfer sheet. You can Examples of the releasing agent include solid waxes such as polyethylene wax, amide wax, and terflon powder, fluorine-based and phosphoric acid ester-based surfactants, and silicone oil, with silicone oil being preferred.

As the silicone oil, oily ones can be used, but curable ones are preferable. Examples of the curable silicone oil include a reaction curable type, a photocurable type and a catalyst curable type, and a reaction curable type silicone oil is particularly preferable. The reaction-curable silicone oil is preferably a reaction-cured amino-modified silicone oil and epoxy-modified silicone oil. The addition amount of these curable silicone oils is preferably 0.5 to 30 parts by weight with respect to 100 parts by weight of the resin constituting the receiving layer.

Further, a release agent layer may be provided by dissolving or dispersing the above-mentioned release agent in an appropriate solvent and coating it on the surface of the receiving layer, followed by drying. As the release agent constituting the release agent layer, a reaction-cured product of the above amino-modified silicone oil and epoxy-modified silicone oil is particularly preferable. The release agent layer has a thickness of 0.01 to 5 μm,
It is particularly preferably 0.05 to 2 μm. The release agent layer may be provided on a part of the surface of the receiving layer or on the entire surface.However, when it is provided on a part of the surface of the receiving layer, dot impact recording and heat Melt transfer recording and recording with pencil etc. can be performed, sublimation transfer recording is performed on the part where the release agent layer is provided, and recording by other recording method is performed on the part where the release agent layer is not provided. For example, the sublimation transfer recording method and other recording methods can be performed together.

A slipping layer can be provided on the back surface of the base material of the heat transferable sheet. The heat-transferred sheets may be transferred one by one from the stacked state to perform the transfer. In this case, if a slippery layer is provided, the sheets slide smoothly, and the sheets can be accurately sent one by one. Examples of the material of the slipping layer include a methacrylate resin such as methyl methacrylate or an acrylate resin, a vinyl resin such as a vinyl chloride / vinyl acetate copolymer, and the like.

The cushion layer optionally provided between the base material and the receiving layer is a soft layer having cushioning properties, and its 100% modulus is preferably 250 kg / cm ² or less. The cushion layer is provided to allow the receiving layer to change corresponding to the tip of the head when pressed by the thermal head or the like during printing.
The thicker it is, the better cushioning properties can be imparted, and the print density can be improved.

Specific examples of the cushion layer include polyurethane resin, polyester resin, acrylic resin, ethylene / vinyl acetate copolymer resin, vinyl acetate / acrylic copolymer resin, polyvinyl chloride resin, polyethylene resin,
Polypropylene resin, polystyrene resin, polyurethane elastomer, epoxy resin, vinyl chloride / vinyl acetate copolymer resin, polyvinyl acetate resin, alkyl titanate, polyethyleneimine, polybutadiene, ethylene /
Examples of the layer include an acrylic copolymer resin and an ionomer.

As described above, the thicker the cushion layer is, the better the cushioning property can be obtained. However, if the cushion layer is made too thick, the thickness of the thermal transfer sheet becomes large.
It is preferable to select it in the range of about 1 to 200 μm as necessary. More preferable thickness of the cushion layer is 3 to 7
It is 0 μm, and particularly preferably about 5 to 40 μm.

As a method for forming the cushion layer, extrusion coating, hot melt coating and the like can be used in addition to ordinary solution coating. Further, a method in which an appropriate support impregnated with the ink composition for forming a cushion layer is sandwiched between a base material and a receiving layer can also be adopted.

It is also possible to form fine bubbles in the cushion layer in order to enhance the cushioning property. In order to form bubbles, a W / O type emulsion is used as the cushion layer forming ink composition, a foaming agent is added, and a non-woven fabric or the like is impregnated with the cushion layer forming ink composition. It is possible to use a method in which the ink composition is stirred to cause air bubbles to be caught in the ink composition.

As described above, the thicker the cushion layer is, the higher the cushioning property can be obtained. However, if the cushion layer is too thick, the drying tends to be insufficient at the time of production, and blocking occurs when the sheet is stored. A problem often occurs that causes If it is attempted to dry sufficiently in order to prevent this problem, the cost will increase in terms of time and equipment, and manufacturing will be difficult in practice. On the other hand, if the cushion layer is too thick, the resin of the cushion layer bleeds into the receiving layer, causing uneven density during printing.

In order to solve such a problem, it is preferable to interpose a sheet-like material for separating the receiving layer and the cushion layer from each other. Examples of the material of this sheet material include polyethylene terephthalate, stretched polypropylene, non-stretched polypropylene, ethylene / vinyl acetate copolymer, ionomer, cellulose acetate, polycarbonate, hard or semi-hard vinyl chloride and the like. Paper such as condenser paper can also be used. The thickness of the sheet material is preferably about 2 to 60 μm.

By interposing the sheet-like material between the receiving layer and the cushion layer, it is possible to prevent image bleeding due to transfer of the ink transferred to the receiving layer to the cushion layer. When the cushion layer is provided in contact with the receiving layer, the resin of the cushion layer migrates to the receiving layer,
The resin forming the cushion layer could be used only if it also has aptitude as a receiving layer, but such a problem can be solved by interposing the sheet-like material.

Each of the layers constituting the heat transferable sheet may be a transparent layer, or one layer or two or more layers may be opaque layers.

The heat transferable sheet may be subjected to antistatic treatment with an antistatic agent. By performing the antistatic treatment, it is possible to make the sheets slip more smoothly and prevent dust from adhering to the heat-transferred sheet. The antistatic treatment may be carried out by incorporating an antistatic agent into the base material, the receiving layer or the slipping layer provided on the back surface of the base material, or by providing a layer containing the antistatic agent on the back surface of the base material, The latter method is preferred.

The thermal transfer sheet can be provided with a detection mark which is convenient when positioning the thermal transfer sheet and the thermal transfer sheet. The detection mark can be formed by printing or the like. For example, a detection mark that can be detected by a photoelectric tube detection device is provided on the back surface of the base material.

To perform the transfer to the heat transfer sheet by the heat transfer sheet, the color material layer of the heat transfer sheet and the receiving layer of the heat transfer sheet are superposed so that they are in contact with each other, and a thermal head or the like is used from the base material side of the heat transfer sheet. It suffices to heat, and after heating, the thermal transfer sheet is peeled off, whereby the dye in the color material layer of the thermal transfer sheet is transferred onto the receiving layer of the thermal transfer sheet according to the information heated by the thermal head, and the thermal transfer sheet is transferred. An image corresponding to the image information is recorded on the top.

[0045]

EXAMPLES The present invention will be described in more detail with reference to examples.

Example 1 The following ink composition for forming a cushion layer was prepared and applied onto coated paper (basis weight: 104.7 g / m ² ) so that the coating amount after drying would be 10 g / m ² .

Ink composition for forming a cushion layer-Polyurethane resin (Takelac A-712B: manufactured by Takeda Chemicals) 30 parts by weight-Isocyanate curing agent (Takenate A-72B: manufactured by Takeda Chemicals) 18 parts by weight-Ethyl acetate 52 parts by weight

On the coated surface of the above ink composition 1, a 12 μm-thick polyester film (Lumirror: manufactured by Toray) was laminated as a sheet. Next, the following ink composition for receiving layer was prepared and applied on the above-mentioned sheet material so that the coating amount after drying was 4 g / m ² , to obtain a heat transferable sheet.

Ink composition for forming the receiving layer-Polyester resin (Vylon 200: manufactured by Toyobo) 70 parts by weight-Polyester resin (Byron 290: manufactured by Toyobo) 30 parts by weight-Amino-modified silicone (KF-393: manufactured by Shin-Etsu Chemical) 5 Parts by weight-epoxy-modified silicone (X-22-343: manufactured by Shin-Etsu Chemical) 5 parts by weight-methyl ethyl ketone 350 parts by weight-toluene 350 parts by weight

On the other hand, a polyester film (Lumirror: made by Toray) having a thickness of 4.5 μm, which has a heat-resistant slip layer made of a thermosetting acrylic resin on one side, is used as a base material, which is opposite to the side provided with the heat-resistant slip layer. The following ink composition was applied to the side so that the coating amount after drying was 1 g / m ² to form a color material layer to obtain a thermal transfer sheet.

Ink composition for forming a color material layer (cyan) -Disperse dye (Kayaset Blue 714: manufactured by Nippon Kayaku) 4 parts by weight-Polyvinyl butyral resin (ESREC BX-1, manufactured by Sekisui Chemical) 6 parts by weight-Methyl ethyl ketone 45 parts by weight Toluene 45 parts by weight

Ink composition for forming color material layer (magenta) -Disperse dye (MS Red G: manufactured by Mitsui Toatsu Chemicals [Disperse Red 60]) 2.6 parts by weight-Disperse dye (Macrolex Violet R: manufactured by Bayer [Dis Perth violet 26]) 1.4 parts by weight-Polyvinyl butyral resin (S-Rex BX-1, manufactured by Sekisui Chemical Co., Ltd.) 4.3 parts by weight-Methyl ethyl ketone 45 parts by weight-Toluene 45 parts by weight

Ink composition for forming a color material layer (yellow) -Disperse dye (Macrolex Yellow 6G: manufactured by Bayer [Disperse Yellow 201]) 5.5 parts by weight-Polyvinyl butyral (S-REC BX-1: manufactured by Sekisui Chemical Co., Ltd.) 4 0.5 parts by weight Methyl ethyl ketone 45 parts by weight Toluene 45 parts by weight

Printing was performed under the following printing conditions with a thermal head having a dot density of 6 dots / mm using the above thermal transfer sheet and the thermal transfer sheet.

Printing conditions-Printing speed 33.3 ms / line-Feeding pitch 0.166 mm-Pulse width 12.0 ms-Head applied voltage 11.0 V

The reflection density of cyan transferred and printed on the heat transfer sheet was measured using a Macbeth color densitometer RD-918, and it was 1.95. The print density was uniform over the entire printing surface and I could not see any omissions. In addition, the print density was high for all three colors, and a good image was obtained with no roughness, color misregistration, or unevenness of the texture. By controlling the electric energy applied to the head by changing the pulse width, it was possible to obtain an arbitrary print density in the range of 0 to 2.2 with good reproducibility.

Next, printing was performed under the same conditions as above, while changing the thickness of the cushion layer of the heat transferable sheet (changing the coating amount of the ink composition for forming the cushion layer). Table 1 shows the reflection densities and print qualities of the transferred cyan, magenta, and yellow colors.

[0058]

[Table 1]

The evaluation of the printing quality in Table 1 above was ∘ ... Very good ∘.

Example 2 A receiving layer was coated in the same manner as in Example 1 using coated paper (basis weight: 104.7 g / m ² ) as a substrate (coating amount: 4 g / m ² ).
m ² ), to obtain a heat transfer sheet. When printing was performed using this heat-transferable sheet in the same manner as in Example 1, unevenness in printing density and missing dots due to unevenness in the texture of the coated paper used as the base material were observed. The reflection density of cyan was 1.48, the reflection density of magenta was 1.36, and the reflection density of yellow was 1.45.

Example 3 A coated paper (basis weight: 104.7 g / m ² ) was used as a base material, and a W / O type polyurethane resin emulsion (Sampren UE-1000N: manufactured by Sanyo Kasei Co., Ltd.) was applied thereon after drying. Of 10 μg / m ² to form a resin layer containing fine bubbles, and a 12 μm-thick polyester film (Lumirror: manufactured by Toray) used as a sheet was laminated on the resin layer.

Then, a receptor layer was coated in the same manner as in Example 1 (coating amount: 4 g / m ² ) to obtain a heat transferable sheet. When printing was performed on this heat-transferable sheet in the same manner as in Example 1, the print density was uniform over the entire printing surface, and no dot omission was observed.

Example 4 The same cushion layer-forming ink composition as in Example 1 was used as a nonwoven fabric (Diaheat 20: manufactured by Mitsubishi Paper Mills, basis weight 20.6 g /
m ² ), and after drying, one side was laminated with coated paper (basis weight 104.7 g / m ² ) used as a substrate, and the other side was used as a sheet. It was laminated with a 12 μm-thick polyester film (Lumirror: manufactured by Toray) to form a resin layer containing fine bubbles. Next, the same ink composition for forming a receiving layer as in Example 1 was applied onto this sheet so that the coating amount when dried was 4 g / m ² , to obtain a heat transferable sheet.

When printing was performed in the same manner as in Example 1 using this heat transfer transfer sheet, the print density was uniform over the entire print surface, and no dot omission was observed. The reflection density of the transferred cyan was 2.01.

[0065]

The thermal transfer sheet of the present invention has a coloring material layer formed of a composition containing Disperse Yellow 201 and a binder. Since the dye used in the present invention is dissolved in the binder, the dye is the binder. Since it is not necessary to give energy that overcomes the interaction between dye molecules and the interaction between dye molecule and binder at the time of heat transfer as in the case of being dispersed in, the transfer is performed with excellent thermal sensitivity and low heat energy. Has the effect of being able to.

Claims (1)

[Claims] 1. A thermal transfer sheet comprising a color material layer formed of a composition containing Disperse Yellow 201 and a binder on one surface of a substrate.