JPH0615973A - Thermal transfer dye donating material - Google Patents

Abstract

PURPOSE:To prevent the fusion of a thermal transfer dye donating material and an image receiving material at the time of thermal transfer in a thermal transfer system obtaining a color print from an electronic image by adding squalane to the surface layer of the thermal transfer dye donating material coming into contact with the image receiving material at the time of thermal transfer. CONSTITUTION:In a thermal transfer dye donating material wherein at least one dye donating layer is provided on one surface of a support, squalane added to the surface layer coming into contact with an image receiving material at the time of thermal transfer. Squalane is a compd. obtained by hydrogenating squalane being a terpene compd. extracted from a living body of fish and converting the unsaturated bond thereof to a saturated bond and the addition amount thereof is 0.0001-1g/m<2>, pref., 0.01-0.1g/m<2>. As a result, the fusion of the dye donating material and the image receiving material can be prevented without lowering the friction force of both materials, that is, bringing about the color shift or wrinkles of an image.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal transfer dye-donor material for thermal transfer recording, and more particularly to a thermal transfer dye-donor material having improved fusion with a thermal transfer image receiving material during thermal transfer.

[0002]

BACKGROUND ART In recent years, with the rapid development of the information industry, various information processing systems have been developed, and recording methods and devices suitable for the respective information processing systems have also been developed and adopted. As one of such recording methods, the thermal transfer recording method has been widely used recently because the apparatus used is light and compact, noise-free, excellent in operability and maintainability, and easy to colorize. . This thermal transfer recording method is roughly classified into two types, a heat melting type and a heat transfer type. In the latter method, a thermal transfer dye-donor material having a dye-donor layer containing a binder and a heat transferable dye on a support is superposed on a thermal transfer image-receiving material, and heat is applied from the support side of the dye-donor material, and a heat-applied pattern is applied. In this method, a heat transferable dye is transferred to a recording medium (heat transfer image receiving material) in a uniform manner to obtain a transfer image. Here, the heat transferable dye means a dye which can be transferred from the thermal transfer dye-providing material to the thermal transfer image-receiving material by sublimation or diffusion in a medium.

However, the thermal transfer dye-providing material used in this thermal transfer type thermal transfer recording method has the following problems. That is, when an image is formed by this method, the dye-donor material and the dye-image receiving material are superposed and heated by a thermal head to transfer the dye, so that the dye-donating material and the dye image-receiving material are fused by heat to form an image on the image. There is a problem in that the dye layer peels off and remains, and in a severe case, causes a failure in which the transfer machine stops.

As a means for preventing fusion, various compounds have been studied as a releasing agent, and silicone compounds such as silicone resin and silicone oil (Japanese Patent Laid-Open No. 62-20).
8994), a fluorine compound such as a fluororesin (Japanese Patent Application Laid-open No. Sho 6
1-20944 and 62-135826) are known. However, although these release agents improve heat fusion, they greatly reduce the frictional force on the surface of the dye layer,
When the image was transferred on the image receiving material, it was apt to cause color shift and wrinkles of the image.

[0005]

SUMMARY OF THE INVENTION Therefore, the present invention prevents fusing without reducing the frictional force between the dye-donor element and the image-receiving element, that is, without causing color misregistration or wrinkling of the image. The purpose is.

[0006]

The above-mentioned object is to provide a thermal transfer dye-donating material having at least one dye-donating layer on one surface of a support, wherein squarain is contained in a surface layer which is in contact with the image-receiving material during thermal transfer. Was achieved with a thermal transfer dye-donor element.

The squalane used in the present invention is a compound obtained by hydrogenating a terpene compound squalene extracted from a living body such as fish to convert unsaturated bonds into saturated bonds. The squalane used in the present invention is added to the surface layer of the thermal transfer dye-donor element which is in contact with the image receiving material during thermal transfer. When the surface layer is a dye-donor layer, a heat transferable dye,
It is dissolved in an organic solvent together with a binder resin and various additives and added to the dye-providing layer. When a plurality of dye-donor layers are laminated, they are added to the uppermost dye-donor layer. Further, when a surface layer is overcoated as a separate layer on the dye-donor layer, it is added to this surface layer. In any case, it is important that squalane is present on the surface of the thermal transfer dye-donor element that comes into contact with the image receiving material during thermal transfer.

The amount of squalane used in the present invention is 0.0001 g / m ^{2 to 1} g / m ² , preferably 0.0
01 g / m ^{2 to} 0.1 g / m ² , particularly preferably 0.0
It is from 05 g / m ^{2 to} 0.05 g / m ² .

As the support for the thermal transfer dye-providing material, any conventionally known one can be used. Examples thereof include polyethylene terephthalate, polyamide, polycarbonate, glassine paper, condenser paper, cellulose ester, fluoropolymer, polyether, polyacetal, polyolefin, polyimide, polyphenylene sulfide, polypropylene, polysulfone, and cellophane. The thickness of the support of the thermal transfer dye-donor element is generally 2 to
It is 30 μm. An undercoat layer may be provided if necessary.

A thermal transfer dye-donor element using a heat-transferable dye basically has a dye-donor layer containing a dye and a binder which are movable by heat on a support. This thermal transfer dye-donating material is prepared by dissolving or dispersing a conventionally well-known dye that becomes sublimable or becomes mobile and a binder resin in an appropriate solvent to prepare a coating solution, which is prepared by a conventionally known thermal transfer dye-donor. On one side of the support for the material, for example about 0.2-5 μm, preferably 0.4-2 μm.
It can be obtained by coating and drying at a coating amount that results in a dry film thickness of m to form a dye-donor layer. The dye-donor layer may be formed of one layer, but may be formed of two or more layers for use in a method in which the dye-donating layer is repeatedly used many times.
In this case, the dye content and dye / binder ratio in each layer may be different.

As the dye useful for forming such a dye-donor layer, any of the dyes conventionally used in thermal transfer dye-donor materials can be used, but a particularly preferred dye in the present invention is about 150 to 800. Has a small molecular weight, and is selected in consideration of transfer temperature, hue, light resistance, solubility in ink and binder resin, dispersibility and the like. Specific examples thereof include disperse dyes, basic dyes, oil-soluble dyes, and the like. Among them, Sumikaron Yellow E4GL, Dianix Yellow H2G-FS,
Miketone Polyelter Yellow 3GSL, Kayaset Yellow 937, Sumikaron Red EFBL, Dyanix Red ACE, Miketone Polyelter Red FB, Kayaset Red 126, Miketone Fast Brilliant Blue B, Kayaset Blue 136, etc. are preferably used. To be Further, it is preferable to use a yellow dye represented by the following general formula (Y).

[0012]

[Chemical 1]

(Wherein D ¹ represents a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, an alkoxycarbonyl group, a cyano group or a carbamoyl group, and D ² represents a hydrogen atom,
It represents an alkyl group or an aryl group, D ³ represents an aryl group or a heteryl group, and D ⁴ and D ⁵ represent a hydrogen atom or an alkyl group. The above groups may be further substituted. ) Specific examples of compounds are shown below.

[0014]

[Chemical 2]

[0015]

[Chemical 3]

[0016]

[Chemical 4]

[0017]

[Chemical 5]

[0018]

[Chemical 6]

[0019]

[Chemical 7]

[0020]

[Chemical 8]

[0021]

[Chemical 9]

[0022]

[Chemical 10]

[0023]

[Chemical 11]

[0024]

[Chemical 12]

As the magenta dye, the dye of the following general formula (M) is preferable.

[0026]

[Chemical 13]

(In the formula, D ^{6 to} D ¹⁰ are hydrogen atom, halogen atom, alkyl group, alkoxy group, aryl group, aryloxy group, cyano group, acylamino group, sulfonylamino group, ureido group, alkoxycarbonylamino group,
It represents an alkylthio group, an arylthio group, an alkoxycarbonyl group, a carbamoyl group, a sulfamoyl group, a sulfonyl group, an acyl group or an amino group, and D ¹¹ and D ¹² represent a hydrogen atom, an alkyl group or an aryl group. D ¹¹ and D ¹² may combine with each other to form a ring, or D ⁸ and D ¹¹ or / and D ⁹ and D ¹² may combine with each other to form a ring. X, Y and Z represent = C (D ¹³ )-or a nitrogen atom (D ¹³ is a hydrogen atom, an alkyl group, an aryl group,
Represents an alkoxy group, an aryloxy group and an amino group). When X and Y are ═C (D ¹³ ) − or when Y and Z are ═C (D ¹³ ) −, two D ^13's may be bonded to each other to form a saturated or unsaturated carbocycle. . The above groups may be further substituted. ) Specific examples of compounds are shown below.

[0028]

[Chemical 14]

[0029]

[Chemical 15]

[0030]

[Chemical 16]

[0031]

[Chemical 17]

[0032]

[Chemical 18]

[0033]

[Chemical 19]

[0034]

[Chemical 20]

[0035]

[Chemical 21]

[0036]

[Chemical formula 22]

[0037]

[Chemical formula 23]

As the cyan dye, the following general formula (C) is used.
Are preferred.

[0039]

[Chemical formula 24]

(In the formula, D ^{14 to} D ²¹ are synonymous with D ^{6 to} D ¹⁰ and D ²² and D ²³ are synonymous with D ¹¹ and D ^12. ) Specific examples of compounds are shown below.

[0041]

[Chemical 25]

[0042]

[Chemical formula 26]

[0043]

[Chemical 27]

[0044]

[Chemical 28]

[0045]

[Chemical 29]

[0046]

[Chemical 30]

[0047]

[Chemical 31]

[0048]

[Chemical 32]

[0049]

[Chemical 33]

It is preferable to introduce the fading-preventing group described in Japanese Patent Application No. 1-271078 into the compounds of the above general formulas (Y), (M) and (C) since the light fastness is improved.

As the binder resin to be used together with the above-mentioned dye, any of the binder resins known in the art for such purpose can be used. Usually, the heat resistance is high, and the dye migrates when heated. The one that does not interfere with is selected. For example, polyamide-based resin, polyester-based resin, epoxy-based resin, polyurethane-based resin, polyacrylic-based resin (eg, polymethylmethacrylate, polyacrylamide, polystyrene-2-acrylonitrile), vinyl-based resin such as polyvinylpyrrolidone, polychlorinated Vinyl resin (for example, vinyl chloride-vinyl acetate copolymer), polycarbonate resin, polystyrene, polyphenylene oxide, cellulose resin (for example, methyl cellulose, ethyl cellulose, carboxymethyl cellulose, cellulose acetate hydrogen phthalate, cellulose acetate, cellulose acetate propionate, Cellulose acetate butyrate, cellulose triacetate), polyvinyl alcohol resin (eg polyvinyl alcohol, polyvinyl Partially saponified polyvinyl alcohol) such as butyral, petroleum resins, rosin derivatives, coumarone - indene resins, terpene resins, polyolefin resins (e.g. polyethylene, polypropylene) and the like.

Such a binder resin is preferably used in a ratio of about 80 to 600 parts by weight, for example, per 100 parts by weight of the dye. In the present invention, a conventionally known ink solvent can be freely used as an ink solvent for dissolving or dispersing the above dye and binder resin.

The dye-donor layer is formed by selecting a dye so that a desired hue can be transferred when printed, and by arranging two or more dye-donor layers having different hues side by side with one thermal transfer dye-donor material. May be. For example, when an image such as a color photograph is formed by repeatedly printing each color according to the color separation signal, it is desirable that the hue when printed is cyan, magenta, and yellow, and such a hue is given. Line up the three dye-donor layers containing the dye. Alternatively, in addition to cyan, magenta, and yellow, a dye-donor layer containing a dye that imparts a black hue may be added. In addition, it is preferable to provide a mark for position detection at the same time when any one of the dye-donor layers is formed during the formation of these dye-donor layers, because an ink or printing step different from the dye-donor layer formation is not required.

In the present invention, the support used for the thermal transfer image-receiving material can withstand the transfer temperature and satisfies the requirements in terms of smoothness, whiteness, slipperiness, frictional property, antistatic property, dent after transfer and the like. Anything that can be used can be used. For example, synthetic paper (synthetic paper such as polyolefin and polystyrene), fine paper, art paper, coated paper, cast coated paper, wallpaper, backing paper, synthetic resin or emulsion impregnated paper, synthetic rubber latex impregnated paper, synthetic resin Paper support such as paper, paperboard, cellulose fiber paper, polyolefin coated paper (especially paper coated on both sides with polyethylene), various plastic films or sheets such as polyolefin, polyvinyl chloride, polyethylene terephthalate, polystyrene methacrylate, polycarbonate, etc. Films or sheets treated to impart white reflectivity to the plastic, and laminates of any combination of the above may also be used.

The thermal transfer image receiving material is provided with an image receiving layer.
This image-receiving layer contains a substance capable of receiving a heat-transferable dye having a function of dyeing the heat-transferable dye, which receives the heat-transferable dye transferred from the heat-transfer dye-providing material during printing. Or with other binder substances, it is preferable that the film has a thickness of about 0.5 to 50 μm. The following resins are examples of polymers that are typical examples of substances that can receive heat transferable dyes.

(A) having an ester bond: a dicarboxylic acid component such as terephthalic acid, isophthalic acid, succinic acid (these dicarboxylic acid components may be substituted with a sulfonic acid group or a carboxyl group), and ethylene. Polyester resin obtained by condensation of glycol, diethylene glycol, propylene glycol, neopentyl glycol, bisphenol A, etc .: polyacrylic acid ester resin such as polymethyl methacrylate, polybutyl methacrylate, polymethyl acrylate, polybutyl acrylate or polymethacrylic acid ester resin : Polycarbonate resin: Polyvinyl acetate resin: Styrene acrylate resin: Vinyl toluene acrylate resin, etc. Specifically, JP-A-59-101395
No. 63, No. 63-7971, No. 63-7972, No. 63
No. 7973 and No. 60-294862 can be mentioned. As commercially available products, Toyobo Byron 290, Byron 200, Byron 280, Byron 300, Byron 103, Byron GK-14 are used.
0, Byron GK-130, ATR-200 made by Kao
9, ATR-2010, etc. can be used.

(B) Those having a urethane bond Polyurethane resin and the like. (C) Those having an amide bond Polyamide resin and the like. (D) Those having a urea bond, such as urea resin. (E) Those having a sulfone bond Polysulfone resin, etc. (F) Others having a highly polar bond Polycaprolactone resin, styrene-maleic anhydride resin, polyvinyl chloride resin, polyacrylonitrile resin, etc. In addition to the above synthetic resins, mixtures or copolymers of these can also be used.

The thermal transfer image-receiving material, particularly the image-receiving layer, may contain a high-boiling organic solvent or a thermal solvent as a substance capable of receiving the heat-transferable dye or as a diffusion aid of the dye. Specific examples of the high boiling point organic solvent and the heat solvent include JP-A Nos. 62-174754 and 62-24525.
No. 3, No. 61-209444, No. 61-200538
No. 6, No. 62-8145, No. 62-9348, No. 62
The compounds described in Nos. -30247 and 62-136646 can be mentioned.

In the present invention, the image receiving layer of the thermal transfer image receiving material may have a structure in which a substance capable of receiving the heat transferable dye is dispersed and carried in a water-soluble binder. As the water-soluble binder used in this case, various known water-soluble polymers can be used, but water-soluble polymers having a group capable of undergoing a crosslinking reaction by a hardening agent are preferable, and gelatins are particularly preferable. The image receiving layer may be composed of two or more layers. In that case, a synthetic resin having a low glass transition point is used for the layer closer to the support, or a dye having a high boiling point organic solvent or thermal solvent is used to enhance the dyeing property, and the outermost layer has a glass transition point. Use a synthetic resin with a higher point, reduce the amount of high-boiling organic solvent or thermal solvent to the required minimum amount or do not use it, and make the surface sticky, adhere to other substances, re-transfer to other substances after transfer. It is desirable to have a structure that prevents failures such as transfer and blocking with a thermal transfer dye-donating material. It is also preferable to add squalane to the surface layer of the thermal transfer image-receiving material which is in contact with the dye-donor material during thermal transfer to prevent the dye-donor material and the image-receiving material from being fused by heat. The total thickness of the image receiving layer is preferably 0.5 to 50 μm, particularly 3 to 30 μm. In the case of a two-layer structure, the outermost layer preferably has a thickness of 0.1 to 2 μm, particularly 0.2 to 1 μm.

In the present invention, the thermal transfer image receiving material may have an intermediate layer between the support and the image receiving layer. The intermediate layer is any one of a cushion layer, a porous layer, and a dye diffusion preventing layer or a layer having two or more functions depending on the constituent material, and also serves as an adhesive in some cases. The dye diffusion-preventing layer serves to prevent the heat transferable dye from diffusing into the support. The binder constituting the diffusion preventing layer may be water-soluble or organic solvent-soluble, but a water-soluble binder is preferable, and examples thereof include the water-soluble binders mentioned above as the binder for the image-receiving layer, particularly gelatin. The porous layer is
This layer serves to prevent the heat applied during thermal transfer from diffusing from the image receiving layer to the support and to effectively utilize the applied heat.

In the present invention, silica, clay, talc, diatomaceous earth, calcium carbonate, calcium sulfate, barium sulfate, etc. are used for the image receiving layer, cushion layer, porous layer, diffusion preventing layer, adhesive layer and the like which compose the thermal transfer image receiving material. Fine powders of aluminum silicate, synthetic zeolite, zinc oxide, lithopone, titanium oxide, alumina and the like may be contained.

A fluorescent whitening agent may be used in the thermal transfer image-receiving material. As an example, K. Veenkatarama
n edition "The Chemistry of Synth
"tic Dyes", Volume V, Chapter 8, JP-A-61-1
The compound described in No. 43752 can be mentioned. More specifically, stilbene compounds, coumarin compounds, biphenyl compounds, benzoxazolyl compounds, naphthalimide compounds, pyrazoline compounds, carbostyryl compounds, 2,5-dibenzoxazolethiophene compounds, etc. Can be mentioned. The fluorescent whitening agent can be used in combination with an anti-fading agent.

The layers constituting the thermal transfer dye-donor element and thermal transfer image-receiving element used in the present invention may be hardened with a hardener. In the case of curing an organic solvent-based polymer, JP-A Nos. 61-199997 and 58-21539.
The hardeners described in No. 8 and the like can be used. It is particularly preferable to use an isocyanate type hardener for the polyester resin. For curing water-soluble polymers, U.S. Pat. No. 4,678,739, column 41, JP-A-59-1166.
55, 62-245261 and 61-18942.
The hardeners described in the publications are suitable for use. More specifically, aldehyde hardeners (formaldehyde etc.), aziridine hardeners, epoxy hardeners, vinyl sulfone hardeners (N, N'-ethylene-bis (vinylsulfonylacetamide)) Ethane, etc.), N-methylol type hardener (dimethylolurea, etc.), or polymer hardener (Japanese Patent Laid-Open Publication No. Sho 6-62).
2-234157 etc. are mentioned.

An anti-fading agent may be used in the thermal transfer dye-providing material and the thermal transfer image-receiving material. As the anti-fading agent, there are, for example, an antioxidant, an ultraviolet absorber, or a kind of metal complex. Examples of the antioxidant include chroman compounds, coumarane compounds, phenol compounds (eg, hindered phenols), hydroquinone derivatives, hindered amine derivatives, and spiroindane compounds.
The compounds described in JP-A-61-159644 are also effective.

As the ultraviolet absorber, benzotriazole compounds (US Pat. No. 3,533,794, etc.),
4-thiazolidone compounds (US Pat. No. 3,352,68
No. 1), benzophenone compounds (JP-A-56-2)
No. 784, etc.), Japanese Patent Laid-Open No. 54-48535,
There are compounds described in JP-A-62-136641, JP-A-61-188256 and the like. Further, the ultraviolet absorbing polymer described in JP-A-62-260152 is also effective. Examples of the metal complex include U.S. Pat. Nos. 4,241,155 and 4,2.
45,018, columns 3 to 36, ibid., 4,254,195.
Nos. 3-8, JP-A-62-174741, 61-
88256, pages (27) to (29), JP-A-1-755.
68, compounds described in JP-A No. 63-199248 and the like.

Examples of useful anti-fading agents are disclosed in JP-A-62-21.
5272 (125)-(137). An anti-fading agent for preventing discoloration of the dye transferred to the image-receiving material may be contained in the image-receiving material in advance, or may be supplied to the image-receiving material from the outside by a method such as transferring from the dye-providing material. May be. The above-mentioned antioxidant, ultraviolet absorber, and metal complex may be used in combination.

Various surfactants can be used in the constituent layers of the thermal transfer dye-donating material and the thermal transfer image-receiving material for the purpose of coating aid, improvement of peeling property, improvement of sliding property, prevention of electrostatic charge, acceleration of development and the like. Nonionic surfactants, anionic surfactants, amphoteric surfactants and cationic surfactants can be used. Specific examples of these are disclosed in JP-A-62-1734.
63, 62-183457 and the like.

When a substance capable of accepting a heat transferable dye, a releasing agent, an anti-fading agent, an ultraviolet absorber, a fluorescent brightening agent, and other hydrophobic compounds are dispersed in a water-soluble binder, they are dispersed. It is preferable to use a surfactant as an auxiliary agent.
For this purpose, in addition to the above-mentioned surfactants, the surfactants described on pages 37 to 38 of JP-A-59-157636 are particularly preferably used.

A matting agent can be used in the thermal transfer dye-providing material and the thermal transfer image-receiving material. As the matting agent, in addition to the compounds described in JP-A No. 61-88256, page 29, such as silicon dioxide, polyolefin or polymethacrylate, benzoguanamine resin beads, polycarbonate resin beads, AS resin beads and the like are disclosed in JP-A-63-27.
There are compounds described in 4944 and 63-274952.

As mentioned above, the dye-donor element of the invention comprises
Used to form transfer images. Such a process
Imagewise heating the dye-donor element as described above using a laser and transferring the dye image to the image-receiving material to form the transferred image.

The dye-donor elements of the invention are used in sheet form or in continuous rolls or ribbons. If a continuous roll or ribbon is used, it may have areas of different dyes, such as cyan and / or magenta and / or yellow and / or black and / or other dyes that have only one type of dye or are heat transferable. Have separately. That is, one-color, two-color, three-color, or four-color materials (or even multi-color materials) are included within the scope of the present invention.

[0072]

EXAMPLES The effects of the present invention will be described in more detail below by showing specific examples of the present invention. However, the present invention is not limited to these. In the following, "parts" means "parts by weight" unless otherwise specified.

Example 1 (Preparation of thermal transfer dye-donating material) A 6 μm-thick polyester film (manufactured by Teijin) having a heat-resistant slip layer made of a thermosetting acrylic resin on one side was used as a support, and the heat-resistant slide of this support was used. A dye-donor layer-forming ink having the following composition was applied on the surface opposite to the side provided with a conductive layer with a wire bar in the order of a black marking layer, a yellow dye-donor layer, a magenta dye-donor layer, and a cyan dye-donor layer, and dried. . This was designated as Sample 101.

Ink for black marking layer XEL detection mark ink (manufactured by Moroboshi Ink Co., Ltd.) 100 g ATXEL curing agent (D) (manufactured by Moroboshi Ink Co., Ltd.) 4 g Methyl ethyl ketone 40 g Toluene 40 g Dry coating amount 1.2 g / m ²

Ink for yellow dye-donating layer Dye Y-1 4 parts Polyvinyl butyral resin (Denka Butyral 5000A, manufactured by Denki Kagaku) 3 parts Polyisocyanate (Takenate D110N, Takeda Pharmaceutical Co., Ltd.) 0.1 part Methyl ethyl ketone 50 parts Toluene 50 parts Dry Coating amount 1.2g / m ²

Ink for magenta dye-donating layer Dye M-2 3 parts Polyvinyl butyral resin (Denka Butyral 5000A, manufactured by Denki Kagaku) 3 parts Polyisocyanate (Takenate D110N, Takeda Chemical Industries) 0.1 part Methyl ethyl ketone 50 parts Toluene 50 parts Dry Coating amount 1.2g / m ²

Ink for cyan dye-donating layer Dye C-5 3 parts Polyvinyl butyral resin (Denka Butyral 5000A, manufactured by Denki Kagaku) 3 parts Polyisocyanate (Takenate D110N, Takeda Chemical Industries) 0.1 part Methyl ethyl ketone 50 parts Toluene 50 parts Dry Coating amount 1.2g / m ²

(Preparation of Thermal Transfer Image Receiving Material) As a support, one side of high quality paper having a thickness of 175 μm was laminated with low density polyethylene having a thickness of 33 μm in which titanium oxide and ultramarine blue were kneaded, and a high density was provided on the opposite side. Polyethylene thickness 3
Polyethylene coated paper laminated to 2 μm was used. The composition for hydrophilic binder layer (1) was coated on the side of the low density polyethylene laminate so that the amount of gelatin was 1 g / m ² .

Composition for hydrophilic binder layer (1) Gelatin 60 g Water 3000 g Surfactant (compound represented by the following chemical formula 34) 2.3 g Thickener (polystyrene sulfonate potassium salt) 1.4 g

[0080]

[Chemical 34]

Further, a coating composition (2) for image-receiving layer having the following composition was applied on the hydrophilic binder layer by Giesser coating so that the amount of polyester was 10 g / m ² , to prepare a thermal transfer image-receiving material. Drying was carried out for 30 minutes in an oven at 100 ° C. after natural drying in a draft.

Coating composition for image-receiving layer (2) Polyester resin (1) * 20 g Polyisocyanate (KP-90, manufactured by Dainippon Ink) 3 g Amino-modified silicone oil (KF-857, manufactured by Shin-Etsu Silicone) 0.5 g Matting agent 0.01 g Methyl ethyl ketone 100 cc Toluene 100 cc

The composition (mol%) of the above polyester resin (1) * is shown in Table A below.

[0084]

[Table 1]

The transfer method and its conditions are as follows. That is, the thermal transfer dye-donating material and the thermal transfer image-receiving material obtained as described above are superposed so that the thermal transfer layer and the image-receiving layer are in contact, and a thermal head is used from the support side of the thermal transfer dye-donating material. Output 0.2
Transfer is performed in the order of yellow, magenta, and cyan under the conditions of 5 W / dot, pulse width 0.2 to 15 msec, and dot density 6 dots / mm.

As shown in Table B below, squalane was added to each ink composition for the yellow dye-donating layer, the magenta dye-donating layer and the cyan dye-donating layer of the ink sheet of Sample 101 to prepare Samples 102 to 106. .

[0087]

[Table 2]

(Fusion Test) Each sample was set on a sublimation type thermal transfer printer VP7100 (manufactured by FUJIFILM), and black solid transfer was performed according to the above transfer method and conditions. Five sheets were transferred from each ink sheet and evaluated by the frequency of occurrence of fusion. ○: No fusion, good ×: Fusing, bad

(Wrinkle Test) Solid solid transfer of each sample was carried out by the above printer so that the reflection density was about 1.0 according to the above transfer method and conditions. 5 for each ink sheet
Transfer was performed one by one and evaluated by the frequency of occurrence of wrinkles and color misregistration. ○: Wrinkles, no color shift, good ×: Wrinkles, color shift, bad

The results are shown in Table C below.

[0091]

[Table 3]

As is clear from Table C, by using squalane, good results without fusion, wrinkles and color shift were obtained.

[0093]

According to the present invention, by using the thermal transfer dye-donating material containing squalane in the surface layer which is in contact with the image-receiving material during thermal transfer, the image does not cause color misregistration or wrinkle and is excellent in fusion resistance. You can get the image.

Claims (1)

[Claims] 1. A thermal transfer dye-donor material having at least one dye-donor layer on one surface of a support, wherein the surface layer in contact with the image-receiving material at the time of thermal transfer contains squalane.