JPH07195851A - Composite thermal transfer sheet - Google Patents

Abstract

PURPOSE:To prevent the bonding of the tailing generated when a dye receiving layer is released to be transferred to a sublimable dye layer by static electricity and to eliminate jamming or the defective development of image quality accompanied thereby by adding an antistatic agent to the sublimable dye layer or the dye receiving layer. CONSTITUTION:A composite thermal transfer sheet is obtained by arranging a sublimable dye layer 2 and a dye receiving layer 3a on one surface of a base material sheet 1. A plurality of colors, for example yellow 2Y, cyan 2C and magenta 2M are arranged to the sublimable dye layer 2. A releasable heat-resistant slide layer 6 is arranged on the other surface of the base material sheet 1. In this case, an antistatic agent is added to the sublimable dye layer 2 or the dye receiving layer An adhesive layer 4 or an intermediate layer 5 may be provided on the surface of the dye receiving layer 3a. Further, an antistatic agent may be added to at least one of the dye receiving layer 3, the adhesive layer 4 and the intermediate layer 5. By this constitution, the tailing generated when the dye receiving layer 3a is released is prevented from adhering to the sublimable dye layer 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal transfer sheet, and more specifically, it uses a thermal transfer sheet in which a dye image-receiving layer and a sublimation dye layer, which are detachably provided, are formed on the same plane. Of the composite heat transfer sheet integrally formed with a receiving layer and a dye layer capable of forming a color image on plain paper.

[0002]

2. Description of the Related Art Conventionally, various thermal transfer methods have been known. Among them, in the sublimation type thermal transfer method, a sublimation type thermal transfer sheet having a dye layer on one surface of a substrate sheet is a full color image. Used in the formation of. In this sublimation type thermal transfer sheet, a dye layer printed with an ink containing a sublimable dye is provided on one surface of a heat resistant substrate sheet. Then, by a thermal head, the surface of the thermal transfer sheet opposite to the sublimation dye layer side is heated to sublimate (heat transfer) the dots of three colors or four colors to the dye image-receiving sheet to obtain a sublimation transfer which is a full-color image. It forms an image. And because the coloring material used is a dye, it is clear,
Further, it is possible to form a high-quality image which is excellent in transparency and rich in halftone reproduction.

However, in the case of performing such transfer, a sublimation type thermal transfer sheet needs a receiving layer capable of dyeing a color material to be sublimated and transferred, and a plastic sheet such as polyester or a synthetic paper is used. An image receiving sheet for sublimation type thermal transfer, in which a dye receiving layer is provided on a base sheet, is used. In the case of plain paper that does not have dye fixing ability, a sublimation transfer image is formed on the surface provided by transferring the dye receiving layer in another step, or it is formed in advance on a peelable dye receiving layer transfer sheet. The sublimation transfer image was transferred to the plain paper together with the receiving layer. Further, by using a composite thermal transfer sheet in which a peelable dye receiving layer and a sublimation dye layer are sequentially provided on the same sheet, a dye receiving layer is provided on a transfer target by transfer, and then an image is formed. Was.

[0004]

When a dye-receptive layer is formed on the surface of paper by transfer, the transferability and the quality of the transferred image are affected by the surface properties such as smoothness, thickness and cushioning property of the paper. Is. The surface property of the dye receiving layer is often affected by the surface property of the transfer target paper. Therefore, a soft material has been used to increase the thickness so as to have a relatively good cushioning property, or a dye receiving layer is formed via an adhesive layer and an intermediate layer described later. However, as shown in FIG. 5, when the dye receiving layer is transferred to the transfer target sheet with a thermal head or the like, the thickened dye receiving layer has a poor film breakage at the end, particularly at the transfer end. And the tail fin 3 of the resulting dye-receptive layer
W is inverted by static electricity between the sublimation dye layer surface and the adhesive layer of the tail fin and the sublimation dye layer surface are bonded,
When a defective printing portion occurs or when the reversal phenomenon causes the opposing receiving layers 3 to be heat-fused by the printing energy during dye image formation, not only defective printing but also the thermal transfer sheet and the printed sheet after printing Since the transfer body is not peeled off, there is a problem in that a jamming phenomenon occurs and the thermal transfer sheet runs poorly.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a composite thermal transfer in which a releasable dye receiving layer and a sublimation dye layer are provided on one surface of a base sheet in a surface sequential manner. In the sheet, the dye receiving layer and / or the sublimation dye layer contains an antistatic agent. Furthermore, in the composite thermal transfer sheet in which an intermediate layer and / or an adhesive layer is laminated on the surface of the dye receiving layer, at least one of the intermediate layer, the adhesive layer and the dye receiving layer contains an antistatic agent. It is a thing.

As shown in FIG. 1, the composite thermal transfer sheet of the present invention has one of the sublimation dye layer 2 and the dye-receptive layer 3 provided on one surface of the base material sheet 1 in order to prevent static charge. The agent is added. In addition, this antistatic agent
It can be provided in both the sublimation dye layer and the dye receiving layer. Further, when an intermediate layer and / or an adhesive layer is provided on the receiving layer as shown in FIGS. 3 and 4, an antistatic agent may be added to these layers. A particularly preferred embodiment is to prevent static electricity generated at the peeling interface when the dye receiving layer is peeled and transferred, and to prevent static electricity generated by friction during winding of the composite thermal transfer sheet performed for each color transfer,
An antistatic agent is added to the receptive layer so that the receptive layer surface of the tail fin is not electrostatically adsorbed by the sublimation dye layer, and the adhesive layer surface of the tail fin and the transfer material are in an adsorbed state due to some static electricity. Preferably. Then, as shown in FIG. 5, the dye receiving layer is transferred to the material 10 to be transferred by the thermal head 7 and, as shown in FIG. 6, an image is formed on the surface of the dye receiving layer via the dye layer. Further, as shown in FIG. 2, the composite thermal transfer sheet of the present invention is provided with a releasable heat resistant slipping layer 6 on the back surface of the base material sheet 1 so that the base material sheet softens and sticks at the temperature when applied. It is configured to prevent and smooth the running of the seat. Further, in the present invention, as shown in FIGS. 3 and 4, an intermediate layer 5 for improving whiteness and cushioning property and an adhesive layer 4 for improving adhesion to a transfer material are provided on the surface of the dye receiving layer. The dye receiving layer 3a can also be formed. Further, the intermediate layer can also have the function of an adhesive layer.

Sublimation dye layer 2 of the composite thermal transfer sheet of the present invention
Is not only one color as shown in FIGS.
For example, yellow 2Y, cyan 2C, magenta 2M and the like can be provided.

[0008]

Since the composite thermal transfer sheet having the above-mentioned structure contains the antistatic agent, it prevents the tail fins from being charged at the end of the dye receiving layer, which occurs when the thermal transfer head is peeled and transferred to the transfer material. Prevents the sublimation dye layer and the receiving layer from adhering to the surface of the substrate sheet after transfer peeling. The antistatic agent contained in the sublimation dye layer functions to prevent the tail fin from being electrostatically adsorbed to the sublimation dye layer.

As the base sheet of the present invention, those used in conventional thermal transfer sheets can be used. For example,
Thin paper such as glassine paper, condenser paper, polyester,
Examples include stretched or unstretched sheets of polypropylene, polyethylene, ionomers, polyvinyl chloride, polyvinylidene chloride, polystyrene, polyamide, polyimide and the like, and composites thereof. The thickness of this substrate sheet can be appropriately selected depending on its strength, heat resistance, etc., but the thickness is 3 to 100 μm.

When the surface of the substrate sheet on which the sublimation dye layer is not provided is prevented from heat fusion with the thermal head, the running property is stabilized, or when the composite thermal transfer sheet is wound up. In addition, a releasable heat resistant slipping layer that prevents blocking with the adhesive layer can be provided. The releasable heat resistant slipping layer is basically formed from a coating liquid composed of a heat resistant resin and a release agent or a substance having a lubricant function. Heat resistant resin has a glass transition point of 60 ° C.
The above synthetic resin, a thermoplastic resin having an -OH group or a -COOH group, a compound having two or more amino groups, or one obtained by adding diisocyanate or triisocyanate to crosslink and cure, or a curable silicone is preferable. is there.
Mold release agents and lubricants, such as waxes, amides, esters and salts of higher fatty acids, melt and act by heating, and those that act as solids such as fluororesins and inorganic powders. There is. The application is normal roll coating, gravure coating, gravure reverse coating,
Alternatively, it may be one that can be applied and dried in a predetermined amount with a bar coat or the like, and its application amount is 0.5 to 5.0 g / m ² (solid content, hereinafter, the application amount of the present invention is described as solid content). Is.

The material for forming the dye receiving layer is a conventionally used main resin containing a releasing agent and an antistatic agent. The main resin is, for example, a polyolefin resin such as polypropylene, an ionomer, a polyvinyl chloride resin, a vinyl chloride / vinyl acetate copolymer, a halogenated polymer such as polyvinylidene chloride, polyvinyl acetate, or a polyacrylic ester. Vinyl resins, polyester resins such as polyethylene terephthalate and polybutylene terephthalate, polystyrene resins, polycarbonates, copolymers of olefins such as ethylene and propylene with vinyl monomers, and cellulose derivatives such as cellulose diacetate and cellulose triacetate. And particularly preferred are vinyl resins,
And a polyester resin.

The dye-receptive layer preferably contains a release agent added to the above resin in order to prevent heat fusion with the dye layer of the thermal transfer sheet. As the release agent, silicone oil, phosphate ester-based surfactant, fluorine-based compound and the like can be used, and among them, silicone oil is particularly preferable. The appropriate amount of the release agent added is 0.2 to 30 parts by weight based on 100 parts by weight of the binder forming the image receiving layer.

If necessary, the dye-receptive layer contains an antistatic agent to prevent tail fins due to defective film breakage that occur during transfer from adhering to the sublimation dye layer due to static electricity. The antistatic agent is glycerin fatty acid (C ₈ ~
C ₂₂₎ esters, sorbitan fatty acid (C ₈ -C ₂₂₎ esters, propylene glycol fatty acid (C ₈ -C ₂₂₎ esters, sucrose fatty acid (C ₈ -C ₂₂₎ esters, citric acid mono- (di- or tri-) stearate esters, pentaerythritol fatty acid (C ₈ ~C ₂₂₎ esters, polyglycerin fatty acid (C ₈ ~C ₂₂₎ esters, polyoxyethylene glycerin fatty acid (C ₈ ~C ₂₂₎ esters, polyoxyethylene sorbitan fatty acid (C ₁₂ -C ₂₂ ) Ester,
Polyethylene glycol fatty acid (C ₈ -C ₂₂₎ esters, polypropylene glycol fatty acid (C ₈ -C ₁₈₎ esters, polyoxyethylene (9,5) dodecyl ether, polyoxyethylene (4～14,30～50) alkyl (C _{4, 9, 12)} phenyl ether, N, N-bis (2-hydroxyethyl) fatty (C ₁₂ -C ₁₈₎ amine,
Condensation product of fatty acid (C ₁₂ -C ₁₈ ) and diethanolamine, polyoxypropylene polyoxyethylene block polymer, polyethylene glycol (molecular weight 200
.About.9500), and nonionic surfactants such as polypropylene glycol. In addition, alkyl (C ₁₀ ~C ₂₀₎
Sulfonate (Na, K, NH ₄ ), alkyl (C ₉
-C ₂₀₎ benzene sulfonate (Na, K, N
H ₄ ), alkylnaphthalene sulfonate (Na),
Sodium alkyl (C ₄ , ₅ , ₆ , ₈ , ₁₃ ) sulphosuccinate, alkyl (C ₁₀ -C ₂₀ ) sulphate (N
a, K, NH ₄ ), anionic surfactants such as potassium stearate, and zwitterionic surfactants such as N-acyl (C ₈ -C ₁₈ ) sarcosinate. The addition amount of these antistatic agents is preferably 0.05 to 5% with respect to the main resin.

The dye-receptive layer is prepared by adding a necessary additive such as a release agent and an antistatic agent to the above-mentioned main resin and dissolving or dispersing it in water or a solvent such as an organic solvent. ,
Printing can be performed by a usual method such as a gravure printing method, a screen printing method, a flexographic printing method, or the like. It is desirable that the coating thickness is 0.5 to 15 μm.

The composite thermal transfer sheet, as shown in FIG.
The sublimation dye layer 2 is formed on the same surface as the dye receiving layer 3 of the base material sheet 1 at a predetermined interval in a surface sequential manner. This sublimation dye layer is formed by a method such as gravure printing, screen printing, or flexo printing, which is obtained by appropriately adding the above-mentioned antistatic agent that suppresses the generation of static electricity to a conventionally used dye ink. can do.

As the dye used in the ink, any of the dyes used in conventionally known thermal transfer sheets can be used without particular limitation. Any conventionally known binder can be used as the ink binder. For example, cellulose derivatives such as methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, cellulose acetate, cellulose acetate butyrate, polyvinyl alcohol, polyvinyl acetate, polyvinyl butyral, polyvinyl acetal, polyvinyl pyrrolidone, vinyl resins such as polyacrylamide, polyester. There are system resins. Among these, cellulose-based acetal-based, vinyl butyral-based, and polyester-based resins have suitable heat resistance and are preferable from the viewpoint of dye sublimation / migration. Further, in addition to the above-mentioned antistatic agent, if necessary, various binders such as conventionally known plasticizers and lubricants are added to form the binder.

The sublimation dye layer can be formed by gravure printing, screen printing or flexographic printing using an ink for a sublimation dye layer in which the above dye and binder are dissolved or dispersed in an arbitrary solvent. This dye layer has a thickness of 0.2-5 μm, preferably 0.5-2.0 μm.
The sublimable dye layer has a thickness of about 5 to 90% by weight, preferably 10 to 70% by weight.

The positional relationship for forming the dye receiving layer and the sublimation dye layer is not particularly limited, but as shown in FIGS. 1 to 3, the dye receiving layer → the yellow dye layer → the magenta dye layer → the cyan dye layer are surface-sequential. And a black dye layer or a transfer type protective layer can be additionally formed as one unit, if necessary. Further, it is general that each sublimation dye layer and the dye receiving layer are provided in the same area. However, depending on the type of the material to be transferred and the durability required for the image, the dye receiving layer may be formed in a larger area in order to perform the transfer twice or more in order to provide a thicker layer.

In order to stabilize the transferability of the receiving layer, an adhesive layer 4 as shown in FIGS. 3 and 4 can be provided on the surface of the dye receiving layer. The adhesive layer has no adhesiveness at room temperature and is formed of a heat-sensitive adhesive that exhibits adhesiveness by heating or an adhesive adhesive that has adhesiveness at room temperature.
For example, a known heat-sensitive adhesive, pressure-sensitive adhesive, or pressure-sensitive adhesive can be used. Of these, a heat-sensitive adhesive is particularly preferable. Even when these composite thermal transfer sheets are wound in a roll,
By the synergistic effect with the release layer heat resistant slipping layer which is the back layer,
Blocking between the adhesive layer of the base sheet and the back surface can be made less likely to occur.

As the above-mentioned heat-sensitive adhesive, it is preferable to use a thermoplastic resin which softens and is tacky when heated and pressed. Examples of the thermoplastic resin include acrylic resins, vinyl resins, synthetic rubber resins, EVA resins, and ethylene resins. The adhesive layer is preferably formed of a thermoplastic resin having a glass transition temperature of 50 ° C to 80 ° C. The reason for this is that in the case of a resin having a glass transition temperature of less than 50 ° C., blocking and various problems associated with it occur when the resin is rolled and stored, and the image-receiving sheet is a rough paper such as a postcard. In this case, the fluidity of the heat-melted adhesive may be too high, so that the paper may be soaked into the paper and the cushioning effect may be deteriorated. On the other hand, when the glass transition temperature of the thermoplastic resin forming the adhesive layer exceeds 80 ° C., when the dye receiving layer is transferred by the thermal head, when the environmental temperature is low (for example, in cold regions or winter). The reason is that the fluidity of the melted adhesive may be too low and the adhesiveness may be insufficient. The adhesive layer preferably has a melt viscosity at 160 ° C. of 1 to 100 poise. This is because if it is lower than 1 poise, the fluidity of the melted adhesive is too high, and if it is higher than 100 poises, the fluidity of the melted adhesive is too low. Such an adhesive resin has a suitable glass transition temperature from a resin having good adhesiveness at the time of heat such as polyamide resin, acrylic resin, vinyl chloride resin, vinyl chloride / vinyl acetate copolymer resin, polyester resin, etc. It can be formed by selecting one and applying and drying the solution.

As the pressure sensitive adhesive, for example, in the case of an epoxy type adhesive, it is formed by mixing a binder containing an epoxy curing agent with a microcapsule of an epoxy resin and pressurizing it. The capsule is broken and the curing agent and the main agent react with each other to exhibit adhesiveness.
In addition, there are various pressure-sensitive adhesives such as one or both of two-component reactive adhesives such as urethane type which are encapsulated,
Either can be used in the present invention. These pressure-sensitive adhesives or pressure-sensitive adhesives are, for example, 922, AF923, AF924 manufactured by Nippon Synthetic Rubber Co., Ltd., Corponile 8780, 8750 manufactured by Nippon Synthetic Chemical Industry Co., Ltd., and Scotch Grip manufactured by Sumitomo 3M Limited. It can be purchased from the market and used under the product names such as 2343 and 2451. Known adhesives such as rubber-based, acrylic-based, and silicone-based adhesives can be used. The formed adhesive layer has a thickness of 0.5 to 10 μm.

Further, in the present invention, as shown in FIGS. 3 and 4, a cushioning property and / or a space between the receiving layer and the adhesive layer are provided.
Alternatively, it is possible to provide the intermediate layer 5 that provides the hiding property. The intermediate layer is formed by containing bubbles, a white pigment, or a fluorescent whitening agent. Such an intermediate layer can be formed as a separate layer by dividing it into a layer containing bubbles and a layer containing a white pigment or the like. In this way, the base sheet is provided with cushioning properties to maintain the adhesiveness between the thermal transfer sheet and the image receiving sheet, and to prevent graininess from the highlight portion of the image to the halftone. In addition, the intermediate layer that provides the hiding property is a white pigment, a fluorescent whitening agent, and a conventional ink, which are formed by a method such as gravure printing, screen printing, or flexo printing
It is provided in a thickness of 10 μm and improves the density of the image formed.

The intermediate layer containing bubbles is a polyurethane resin,
Acrylic resin, butadiene rubber, epoxy resin, and the like can be used as the main components, and can be formed by the following method. An ink mixed with a foaming agent is applied and formed on a substrate sheet, and foamed by heat when transferring the dye receiving layer. Apply the ink mixed with the foaming agent on the base sheet,
Heat and foam. The foaming agent in this case is a decomposition type foaming agent such as dinitropentanemethylenetetramine, which decomposes by heat to generate gas such as nitrogen, diazoaminobenzene, azobisisobutyronitrile, azodicarbonamide, or the like, or Any known foaming agent such as microspheres in which a low-boiling-point liquid such as butane or pentane is made into a microcapsule with a resin such as polyvinylidene chloride or polyacrylonitrile can be used. This microsphere is particularly preferable in that it does not cause defects such as pinholes in the printed image because the bubbles have outer walls even after foaming.

The amount of the foaming agent added to the foam layer is such that the expansion ratio of the foam layer (thickness after foaming / thickness before foaming) is 1.
The foam layer is formed by selecting the range of 1 to 10 times. It is also determined by the quality and density required for the image formed on the dye receiving layer. That is, if the foaming efficiency is low, the amount of the foaming agent added to the binder is preferably increased, and if the foaming efficiency is high, the amount of the foaming agent added can be reduced. In addition, microcapsule foaming agents such as microspheres,
Even after foaming, the bubbles have an outer wall, so the foam layer,
It is particularly preferable because defects such as pinholes do not occur in the image receiving layer.

The ink of the intermediate layer, which is the foam layer, is formed of air bubbles and a binder that wraps them. The binder is
Polyurethane resin, epoxy resin, vinyl resin,
The main component is an arbitrary resin such as an acrylic resin, a polyamide resin, a polyolefin resin, or a polystyrene resin. Then, it is provided in a thickness of 2 to 10 μm by a method such as gravure printing or screen printing.

The intermediate layer can also be formed of the same material as the dye receiving layer, and various additives such as a release agent are added if necessary. As the binder, it is preferable to use a sublimation dye that is easily dyed, polyolefin resin such as polypropylene, polyvinyl chloride, halogenated resin such as polyvinylidene chloride, polyvinyl acetate, vinyl resin such as polyacrylic ester, Polyester resins such as polyethylene terephthalate and polybutylene terephthalate, polystyrene resins, polyamide resins,
Copolymers of olefins such as ethylene and propylene with other vinyl monomers, ionomers, cellulose derivatives and the like can be used, and among these, vinyl resins,
And polyester resins are particularly preferable.

The material to be transferred of the composite thermal transfer sheet of the present invention for forming an image by transferring the receiving layer is not particularly limited to a material such as paper or a plastic sheet, and a card,
The shape of the postcard does not matter. In particular, it can be applied to uncoated paper having a poor surface smoothness to obtain a good quality image.

A known printer having a thermal head for thermal transfer and capable of heating and pressurizing to a temperature at which the adhesive layer is activated can be used for transferring the receiving layer and forming an image. As shown in FIG. 5, the receptive layer surface 3 of the composite thermal transfer sheet is superposed on the transfer material 10 such as plain paper so as to face it, and the thermal head 7 is applied to a necessary portion from the back side at an appropriate temperature and pressure for adhering the dye receiving layer. Energy is applied to transfer and adhere to the transfer material to provide a dye receiving layer, and then, as shown in FIG. 6, the dye receiving layer and the dye layer are overlapped facing each other to form the dye layers 2Y, 2M and 2C. A full-color image is formed by sequentially transferring onto the receiving layer.

[0029]

【Example】

[Example 1] Next, the present invention will be specifically described with reference to examples. In the text, parts and% are based on weight unless otherwise specified. As a base material sheet 1, a 6 μm polyester film (manufactured by Toray Industries, Inc.) was coated with 0.5 g / m 2 on one side of a coating liquid for a releasable heat resistant slipping layer having the following composition using a bar coater. ^It was coated and dried so as to have a thickness of ² , and further heated and cured at 100 ° C. for 30 minutes to form a releasable heat resistant slipping layer 6. "Releasable heat-resistant slipping layer coating liquid" -Curable silicone KS-770A 20 parts (manufactured by Shin-Etsu Chemical Co., Ltd.)-Curing catalyst CAT-PL8 0.5 part (manufactured by Shin-Etsu Chemical Co., Ltd.)- Toluene 80 parts On the other side of the above sheet provided with a releasable heat resistant slipping layer, "ink N for sublimation dye layer" (yellow, magenta, cyan) having the following composition, and a "dye receiving agent containing an antistatic agent Layer ink R "was used for 1 g / m ² and 5 g / m ² respectively.
Gravure printing was performed so as to obtain m ² , and the dye receiving layer 3 and the sublimation dye layer 2 were provided to obtain a composite thermal transfer sheet of the present invention. "Ink R for dye receiving layer" -Vinyl chloride / vinyl acetate copolymer VYHD (manufactured by UCC) 20 parts-Epoxy modified silicone KF-393 1.8 parts (manufactured by Shin-Etsu Chemical Co., Ltd.) 1.8 parts-Amino Modified Silicone KP-343 (manufactured by Shin-Etsu Chemical Co., Ltd.) ・ Antistatic agent Cationic TOF-1100 1 part (manufactured by NOF CORPORATION) ・ Fluorescent brightener Ubitex OB 0.02 part (manufactured by Ciba Geigy) ・ Methyl ethyl ketone / Toluene (1/1) 100 parts "Sublimation dye layer ink N" -Disperse dye (Note) 4.0 parts-Ethyl hydroxycellulose (Hercules) 5.0 parts-Methyl ethyl ketone / toluene (1/1) 80 parts・ Dioxane 10 parts Note: Disperse dye ・ Yellow dye layer ink CI Disperse Ye
llow 201 ・ Magenta dye layer ink C.I. I. Disperse Re
d60 ・ Cyan dye layer ink Nippon Kayaku Co., Ltd. Kayaset Blue

Example 2 On the side of the film obtained in Example 1 on which the releasable heat resistant slipping layer is not provided, "Dye-receiving layer ink N" having the following composition and an antistatic agent are added. Ink R for sublimation dye layer "(yellow, magenta, cyan)
Was used to provide the dye-receiving layer 3 and the sublimation dye layer 2 by gravure printing so as to have 5 g / m ² and 1 g / m ² , respectively, to obtain a composite thermal transfer sheet of the present invention. "Ink N for dye receiving layer" -Vinyl chloride / vinyl acetate copolymer VYHD (UCC) 20 parts-Epoxy modified silicone KF-393 1.8 parts (Shin-Etsu Chemical Co., Ltd.) 1.8 parts-Amino Modified silicone KP-343 (manufactured by Shin-Etsu Chemical Co., Ltd.)-Fluorescent brightener Ubics OB 0.02 part (manufactured by Ciba Geigy) -Methyl ethyl ketone / toluene (1/1) 100 parts "Sublimation dye layer ink R" -Disperse dye (Note) 4.0 parts-Ethyl hydroxycellulose (manufactured by Hercules) 5.0 parts-Antistatic agent Cationic TOF-1100 1 part (manufactured by NOF CORPORATION) -Methyl ethyl ketone / toluene (1/1) 80 parts- Dioxane 10 parts Note: Disperse dye-Yellow dye layer ink CI Disperse Yellow 201-Magenta dye layer ink CI Dispers e Red 60 ・ Cyan dye layer ink Nippon Kayaku Co., Ltd. Kayaset Blue

Example 3 On the surface of the film obtained in Example 1 on which the releasable heat resistant slipping layer was not provided, gravure printing was performed to obtain "ink N for sublimation dye layer" (yellow, magenta, Cyan) is used to provide the sublimation dye layer 2 of each color so that each of them becomes 1 g / m ² , and further, in the frame order, using the “dye receiving layer ink N” containing no antistatic agent,
The dye receiving layer 3 was provided so that the coating amount was 4 g / m ² .
Further, the adhesive layer 4 was laminated on the dye receiving layer using "adhesive layer ink R" containing an antistatic agent so that the coating amount was 1 g / m ^2, and the composite thermal transfer sheet of the present invention was formed. Got "Adhesive layer ink R" -Acrylic resin BR-45 (manufactured by NOF CORPORATION) 25 parts-Antistatic agent cationic TOF-1100 1 part (manufactured by NOF CORPORATION) Methyl ethyl ketone / toluene (1/1) 74 copies

[Example 4] Dye receiving layer 3 containing an antistatic agent consisting of dye receiving layer ink R "on the surface of the film obtained in Example 1 on which the releasable heat resistant slipping layer is not provided "Ink N for intermediate layer" of the following composition on the surface of the
And "Adhesive layer ink N", the intermediate layer 5 and the adhesive layer 4
And further using "Ink N for sublimation dye layer" (yellow, magenta, cyan) adjacent to the dye receiving layer,
The dye-receptive layer was formed by gravure printing so that the amount of the dye receiving layer was 4 g / m ² and the other layers were 1 g / m ² , to obtain a composite thermal transfer sheet of the present invention. "Adhesive layer ink N" -Acrylic resin BR-45 (manufactured by Mitsubishi Rayon Co., Ltd.) 25 parts "Ink layer ink N" -Titanium oxide TCA-888 30 parts (Tochem Products) -Acrylic resin BR-85 ( Mitsubishi Rayon Co., Ltd. 15 parts Methyl ethyl ketone / toluene (1/1) 65 parts [Example 5] On the surface of the film obtained in Example 1 on which the releasable heat resistant slipping layer is not provided, On the surface of the dye-receiving layer 3 containing the antistatic agent consisting of "Dye-receiving layer ink R", "Ink for intermediate layer R" and "Adhesive layer ink R" having the following composition
The intermediate layer 5 and the adhesive layer 4 are further laminated, and the dye-receptive layer is 4 g / m ² by using "ink R for sublimation dye layer" (yellow, magenta, cyan) adjacent to the dye-receptive layer.
And the other layers were formed by gravure printing so as to be 1 g / m ² to obtain a composite thermal transfer sheet of the present invention. "Ink R for intermediate layer" -Titanium oxide TCA-888 30 parts (Tochem Products) -Acrylic resin BR-85 (manufactured by Mitsubishi Rayon Co., Ltd.) 15 parts-Antistatic agent cationic TOF-1100 1 part-Methyl ethyl ketone / Toluene (1/1) 64 parts

[Comparative Example 1] "Ink N for dye receiving layer" and "Ink N for dye layer" (yellow, magenta) on the surface of the film obtained in Example 1 on which the releasable heat resistant slipping layer is not provided. , Cyan) and printed at 5 g / m ² and 1 g / m ² , respectively, to obtain a conventional composite thermal transfer sheet. (Below margin)

[0034]

[Table 1] (Jamming occurs when the tail fin is inverted and fused with the transfer sheet.) As described above, for each of the composite thermal transfer sheets of Examples 1 to 3 and Comparative Example, Sony Corp.
After the dye receiving layer was transferred to the postcard, the dye was transferred to form a full-color image, and the condition of tail fin was observed. As shown in Table 1, the effect of the antistatic agent was clearly exhibited.

[0035]

[Effect] As described above, the composite thermal transfer sheet of the present invention is
Due to the effect of the antistatic agent contained in the dye receiving layer and / or the sublimation dye layer, the tail ridge generated when the dye receiving layer is peeled off and transferred is adhered to the dye layer or the dye receiving layer by static electricity. It was possible to form a good image on the transfer material without the occurrence of jamming and the phenomenon of poor image quality.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a cross section of a composite thermal transfer sheet of the present invention.

FIG. 2 is a conceptual diagram showing a cross section of a composite thermal transfer sheet provided with a releasable heat resistant slipping layer.

FIG. 3 is a conceptual diagram showing a cross section of a composite thermal transfer sheet of an example.

FIG. 4 is an enlarged view of the dye receiving layer portion of FIG.

FIG. 5 is a conceptual diagram of a cross section showing a state in which a dye receiving layer is transferred from a composite thermal transfer sheet.

FIG. 6 is a conceptual diagram showing a state in which a tail fin of a charged receptive layer is reversed and attached to a sublimation dye layer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate sheet 2 2Y, 2M, 2C Sublimation dye layer 3 Dye receiving layer 3a Dye receiving layer provided with an adhesive layer and an intermediate layer 3W Tail fin of dye receiving layer 4 Adhesive layer 5 Intermediate layer 6 Releasability Heat resistant lubricity Layer 7 Thermal head 10 Transfer material

Claims (3)

[Claims] 1. A composite thermal transfer sheet in which a releasable dye receiving layer and a sublimation dye layer are provided on one surface of a base sheet in a face-sequential manner, and the dye receiving layer and / or the sublimation dye layer are antistatic. A composite thermal transfer sheet characterized by containing an agent. 2. An intermediate layer and / or an intermediate layer on the surface of the dye receiving layer.
Alternatively, the composite thermal transfer sheet according to claim 1, wherein the adhesive layer is laminated. 3. A composite thermal transfer sheet in which a releasable dye-receiving layer and a sublimation dye layer are provided on one surface of a base sheet in a face-sequential manner, and an intermediate layer and / or an adhesive is provided on the surface of the dye-receiving layer. Laminated with an agent layer, an intermediate layer, a dye receiving layer,
A composite thermal transfer sheet, characterized in that at least one of the adhesive layers contains an antistatic agent.