JPH03126589A - Thermal transfer dye donating material - Google Patents

Abstract

PURPOSE:To perform thermal transfer of high density by low energy and to enhance stability during preservation by providing at least one dye donating layer containing a substantially amorphous thermal transfer dye and a binder whose amount is specific to the dye on a support. CONSTITUTION:At least one dye donating layer containing a substantially amorphous thermal transfer dye and a binder is provided on a support and the thickness of the dye donating layer is pref. set to 0.2-5mum, especially, 0.4-2mum on a dry film basis. The amorphous thermal transfer dye means a dye showing no m.p. according to a general m.p. measuring method. As the binder resin, for example, a polyamide resin or a polyester resin is used and this resin is used in a ratio of about 30-100 pts.wt. per 100 pts.wt. of the dye. As a solvent, one dissolving or dispersing the dye to be used in predetermined concn. or more and sufficiently dissolving or dispersing the binder is used and the use amount thereof is pref. about 5-20 times the sum wt. of the dye and the binder.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a thermal transfer dye-providing material, and in particular a thermal transfer dye-providing material that is capable of high-density thermal transfer with low energy and has excellent stability during storage. It is related to.

(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 for each information processing system have also been developed and adopted. The thermal transfer recording method is one of these recording methods.The equipment used is lightweight, compact, noiseless, easy to operate,
It has excellent maintainability and is easy to color.Thermal transfer recording method uses a thermal transfer dye-providing material that has a dye-donating layer containing a binder and a heat-transferable dye on a support. In this method, heat is applied from the support side of the dye-providing material by superimposing it on a thermal transfer image-receiving material, and the heat-transferable dye is transferred to the recording medium (thermal transfer image-receiving material) using the pattern rod to which the heat is applied, thereby obtaining a transferred image.

Note that the term "thermally transferable dye" as used herein refers to a dye that can be transferred from a thermal transfer dye-providing material to a thermal transfer image-receiving material by sublimation or diffusion in a medium.

(Problem to be Solved by the Invention) However, the thermal transfer dye-providing material conventionally used in this method requires a large amount of energy for thermal transfer of the dye in the binder, and in order to transfer at high density, high energy is required. required. Furthermore, if the amount of binder is reduced, the dye will precipitate in the dye-donating layer during storage, resulting in a deterioration in image quality.

Therefore, there is a need for a thermal transfer dye-providing material that allows high-density thermal transfer with low energy and has excellent stability during storage.

(Means for Solving the Problems) An object of the present invention is to coat an at least substantially amorphous heat-transferable dye on a support with an amount of 30 to 100% by weight based on the dye.
was achieved with a thermal transfer dye-donor material comprising a dye-donor layer containing an amount of binder.

The present invention will be explained in more detail below.

The thermal transfer dye-providing material of the present invention is a thermal transfer dye-providing material having at least one dye-providing layer containing a substantially amorphous heat-transferable dye and a binder on a support, the thermal transfer dye-providing material having a heat-applied pattern. The thickness of the dye-donating layer, which performs recording by transferring the dye to the image-receiving layer of the thermal transfer image-receiving material, is usually 0.2 to 5 μm in dry film thickness, particularly 0.2 to 5 μm in dry film thickness. 4~2!
! It is preferable to set it within the range of .

The substantially amorphous heat-transferable dye of the present invention is a dye that does not exhibit a melting point by a so-called general melting point measuring method. Here, the general method for measuring the melting point is the method described in Nippon Kagaku Kogyo's "New Experimental Chemistry Course" Volume 2, page 87 (published by Marukubi) and Nippon Kagaku Kogyo's "Experimental Chemistry Course" Volume 5, page 307 (published by Marukubi). It is.

Examples of substantially amorphous heat-transferable dyes suitable for use in the present invention are shown below, but the present invention is not limited thereto.

I As the binder resin used with the dye of the present invention, any binder resin conventionally known for this purpose can be used, and usually has high heat resistance and does not interfere with the transfer of the dye when heated. 0 things are selected
For example, polyamide resins, polyester resins, epoxy resins, polyurethane resins, polyacrylic resins (e.g. polymethyl methacrylate, polyacrylamide, polystyrene-acrylonitrile), vinyl resins including polyvinylpyrrolidone, polyvinyl chloride resins, etc. Resin (e.g. vinyl chloride-vinyl acetate copolymer), polycarbonate resin, polystyrene, polyphenylene oxide, cellulose? L't! fats (e.g. methylcellulose, ethylcellulose, carboxymethylcellulose, cellulose acetate hydrogen phthalate, cellulose acetate, cellulose acetate propionate, cellulose acetate butyrate, cellulose triacetate)
, polyvinyl alcohol resins (e.g. partially saponified polyvinyl alcohols such as bovinyl alcohol and polyvinyl butyral), petroleum resins, rosin derivatives, coumaron-indene resins, terpene resins, polyolefin resins (e.g. polyethylene, polypropylene), etc. It will be done.

In the present invention, such a binder resin contains dye 10
It is used in a proportion of about 30 to 100 parts by weight per 0 parts by weight.

As the ink solvent for dissolving or dispersing the above-mentioned pigment and binder resin, conventionally known ink solvents can be freely used. Specifically, alcohol-based ink solvents include methanol, ethanol, isopropyl alcohol, butanol, isobutanol, etc. Examples of the ketone type include methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, etc.; aromatic types include toluene, xylene, etc.; halogen types include dichloromethane, trichloroethane, etc., dioxane, tetrahydrofuran, etc., and mixtures thereof. It is important to select and use these solvents in such a way that the dye used has a predetermined concentration or higher and the binder is sufficiently dissolved or dispersed. For example, it is preferred to use an amount of solvent that is about 5 to 20 times the combined weight of dye and binder.

As the support for the thermal transfer dye-providing material, any conventionally known support can be used.For example, polyethylene terephthalate; polyamide; polycarbonate; glassine; condenser; cellulose ester; fluorine polymer; polyether; polyacetal; polyolefin; polyimide; Examples include cellophane.

The thickness of the support of the thermal transfer dye-providing material is generally 2 to 30 mm.
μ. An undercoat layer may be provided if necessary. Further, a dye diffusion preventing layer made of a hydrophilic polymer may be provided between the support and the dye-donating layer. This further improves the transfer density. As an Il aqueous polymer,
The water-soluble polymers described above can be used.

A swamping layer may also be provided to prevent the thermal head from sticking to the dye-donor material; this slipping layer may contain a lubricating material, such as a surfactant, solid or liquid, with or without a polymeric binder. Consists of lubricants or mixtures thereof.

In the present invention, in addition to the dye-donating layer as described above, a dye-donating layer using a conventionally known heat-transferable dye may be provided on the same support.

Specific examples include disperse dyes, basic dyes, and oil-soluble dyes.

In order to prevent sticking due to the heat of the thermal head and improve slippage when printing from the back side of the dye-donating material, it is preferable to apply an anti-sticking treatment to the side of the support on which the dye-donating layer is not provided.

For example, as a polyvinyl butyral resin, it is preferable to provide a heat-resistant slip layer mainly consisting of ■ a reaction product of polyvinyl butyral resin and an isocyanate, ■ an alkali metal salt or alkaline earth metal salt of a phosphoric acid ester, and ■ a filler. It is preferable to have a molecular weight of about 60,000 to 200,000, a glass transition point of 80 to 110'C, and a vinyl butyral moiety with a weight percentage of 5 to 40% from the viewpoint of having many reaction sites with isocyanate. As the alkali metal salt or alkaline earth metal salt of phosphoric acid ester, Gafac RD720 manufactured by Toho Chemical Co., Ltd. is used, and the amount is about 1 to 50% by weight, preferably 10 to 40% by weight based on the polyvinyl butyral resin. good.

It is desirable that the heat-resistant slip layer has heat resistance as the lower layer.
A combination of a synthetic resin that can be cured by heating and its curing agent,
For example, a combination of polyvinyl butyral and polyvalent isocyanate, acrylic polyol and polyvalent isocyanate, cellulose acetate and a titanium chelating agent, or polyester and an organic titanium compound may be provided by coating.

The dye-donor element may also be provided with a hydrophilic barrier layer to prevent diffusion of the dye towards the support. Hydrophilic dye barrier layers contain hydrophilic materials useful for their intended purpose. Generally excellent results are obtained with gelatin, poly(acrylamide), poly(isopropylacrylamide),
Butyl methacrylate grafted gelatin, edyl methacrylate grafted gelatin, cellulose monoacetate, methylcellulose, poly(vinyl alcohol), poly(ethyleneimine), poly(acrylic acid), poly(vinyl alcohol) and poly(vinyl acetate) It is obtained by using a mixture, a mixture of poly(vinyl alcohol) and poly(acrylic acid) or a mixture of cellulose monoacetate and poly(acrylic acid). Particularly preferred is poly(
acrylic acid), monoacetic acid 6 cellulose or poly(vinyl alcohol).

The dye-providing material may be provided with a subbing layer. In the present invention, any undercoat layer may be used as long as it has the desired effect, but a preferred specific example is (acrylonitrile-vinylidene chloride-acrylic acid) copolymer (weight ratio 14:80:6).
), (butyl acrylate-2-aminoethyl methacrylate-2-hydroxyethyl methacrylate) copolymer (weight ratio 30:20:50), linear/saturated polyester such as Bostik 7650 (Emhart, Bostic) stick chemical group) or chlorinated high density poly(ethylene-trichloroethylene) resins.

There is no particular limit to the amount of undercoat layer applied, but it is usually 0.1
~2.0 g/m'' is used.

(The following is a blank space) The thermal transfer image-receiving material used together with the thermal transfer dye-providing material of the present invention in carrying out the thermal transfer recording method will be described. This thermal transfer image-receiving material has an image-receiving layer capable of receiving at least one heat-transferable dye on a support.

The support used in the thermal transfer image-receiving material of the present invention can withstand the transfer temperature and satisfies the requirements in terms of smoothness, whiteness, slipperiness, friction, antistatic property, denting after transfer, etc. You can use anything. For example, synthetic paper (polyolefin-based, polystyrene-based, etc.), high-quality paper, art paper, coated paper, cast coated paper,
wallpaper, lined paper, synthetic resin or emulsion impregnated paper,
Paper supports such as synthetic rubber latex impregnated paper, synthetic resin internalized paper, paperboard, cellulose fiber paper, polyolefin coated paper (especially Ml coated on both sides with polyethylene), polyolefin, polyvinyl chloride, polyethylene terephthalate, polystyrene, methacrylate, Various plastic films or sheets such as polycarbonate, films or sheets treated to impart white reflective properties to the plastic, and laminates made of any combination of the above may also be used.

Among these, polyolefin coated paper is preferred because it has features such as not causing concave deformation due to heating during thermal transfer, excellent whiteness, and little curling.

The thermal transfer image-receiving material is provided with a dye image-receiving layer.

This image-receiving layer receives the heat-transferable dye transferred from the thermal transfer dye-providing material during printing, and contains a dye-receiving substance that functions to dye the heat-transferable dye alone or Thickness 0.0, including with other binder materials.
It is preferable that the film has a thickness of about 5 to 50 μm.

Examples of dye-receiving polymers that are representative examples of dye-receiving substances include the following resins.

(a) Dicarboxylic acid components having ester bonds such as terephthalic acid, isophthalic acid, and succinic acid (these dicarboxylic acid components contain sulfonic groups,
Polyester resins obtained by condensation of ethylene glycol, diethylene glycol, propylene glycol, neopentyl glycol, bisphenol A, etc. with carboxyl groups (which may be substituted with carboxyl groups, etc.): polymethyl methacrylate, polybutyl methacrylate, polymethyl acrylate, polybutyl Polyacrylic acid ester resin or polymethacrylic acid ester resin such as acrylate: Polycarbonate resin: Polyvinyl acetate resin: Styrene acrylate resin: Vinyl toluene acrylate resin, etc. Specifically, JP-A No. 59-101395, No. 63-7971, No. 63-7972, and No. 63-79.
Examples include those described in No. 73 and No. 60-294862. In addition, as a commercially available product, Byron 290 manufactured by Toyobo. Byron 2001 Byron 280, Byron 300, Byron 103, Byron GK-140, Byron GK-130, Kao ATR-2009, AT
R-2010 etc. can be used.

Mouth) Those with urethane bond polyurethane resin, etc.

(c) Those with an amide bond polyamide resin, etc.

(d) Those with urea bonds urea resin etc.

(e) Those with a sulfone bond.

polysulfone resin, etc.

(f) Others having highly polar bonds, such as polycaprolactone resin, styrene-maleic anhydride resin, polyvinyl chloride resin, polyacrylonitrile resin, etc.

In addition to the synthetic resins mentioned above, mixtures or copolymers thereof 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 dye-receiving substance or as a dye diffusion aid.

Specific examples of high boiling point organic solvents and thermal solvents include JP-A No. 6
No. 2-174754, No. 62-245253, No. 61
-209444, 61-200538, 62-
No. 8145, No. 62-9348, No. 62-30247
No. 62-136646.

The image-receiving layer of the thermal transfer image-receiving material of the present invention may have a structure in which the dye-receiving substance is dispersed and supported in a water-soluble binder. In this case, various known water-soluble polymers may be used as the water-soluble binder. However, water-soluble polymers having a group capable of crosslinking with a hardening agent are preferred, and among them, gelatins are particularly preferred.

As a method for dispersing the dye-receiving substance in the water-soluble binder, any known dispersion method for dispersing a hydrophobic substance in a water-soluble polymer can be used. Typical methods include emulsifying and dispersing a dye-receiving substance dissolved in an organic solvent that is immiscible with water and mixing it with an aqueous solution of a water-soluble binder; There are methods such as mixing with an aqueous solution of

The image-receiving layer may be composed of one layer or two or more layers. If two or more layers are provided, the layer closer to the support may be made of a synthetic resin with a low glass transition point or a high-boiling point organic resin. The structure uses solvents and hot solvents to improve the dyeability of dyes,
For the outermost layer, use a synthetic resin with a higher glass transition point, minimize the amount of high-boiling point organic solvents and hot solvents, or avoid using them to prevent surface stickiness, adhesion with other substances, and post-transfer. It is desirable to have a structure that prevents failures such as re-transfer of the dye to other substances and blocking with the thermal transfer dye-providing material.

The total thickness of the image-receiving layer is 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.

The thermal transfer image-receiving material of the present invention may have an intermediate layer between the support and the image-receiving layer.

The intermediate layer can be a cushion layer, a porous layer, or a
This layer has one of the functions of a dye diffusion prevention layer or a layer having two or more of these functions, and in some cases also serves as an adhesive.

The dye diffusion-preventing layer plays a role, in particular, in preventing the heat-transferable dye from diffusing into the support. The binder constituting this diffusion prevention layer may be water-soluble or organic solvent-soluble, but preferably a water-soluble binder.
Preferred examples include the water-soluble binders mentioned above as binders for the image-receiving layer, particularly gelatin.

The porous layer is a layer that prevents the heat applied during thermal transfer from diffusing from the image-receiving layer to the support and effectively utilizes the applied heat.

The image receiving layer, cushion layer, porous layer, diffusion prevention layer, adhesive layer, etc. constituting the thermal transfer image receiving material of the present invention include silica, clay, talc, diatomaceous earth, calcium carbonate, calcium sulfate, barium sulfate, aluminum silicate, Fine powders of synthetic zeolite, zinc oxide, lithopone, titanium oxide, alumina, etc. may also be included.

A fluorescent brightener may be used in the thermal transfer image-receiving material.

Examples include K, Veenkataraman[r
The Chesttry of 5yntheti
c DyesJ Volume 8 Chapter 8, JP-A-61-14375
Examples include compounds described in No. 2 and the like. More specifically, stilbene compounds, coumarin compounds, biphenyl compounds, benzoxacylyl compounds, naphthalimide compounds, pyrazoline compounds, carbostyril compounds, 2,5-dibenzoxazolethiophene compounds, etc. It will be done.

Optical brighteners can be used in combination with antifade agents.

In the present invention, in order to improve the releasability of the thermal transfer dye-providing material and the thermal transfer image-receiving material, the dye-providing material and/or
Alternatively, it is preferable to include a release agent in the layers constituting the image-receiving material, particularly preferably in the outermost layer corresponding to the surface where both materials come into contact.

Examples of mold release agents include solid or waxy substances such as polyethylene wax, amide wax, and Teflon powder; surfactants such as fluorine-based and phosphate esters; and conventionally known oils such as paraffin-based, silicone-based, and fluorine-based oils. Although any of the above mold release agents can be used, silicone oil is particularly preferred.

As the silicone oil, in addition to unmodified silicone oil, modified silicone oils such as carboxy-modified, amino-modified, and epoxy-modified silicone oils can be used.

Examples include various modified silicone oils described on pages 6 to 18B of the "Modified Silicone Oil" technical data published by Shin-Etsu Silicone Co., Ltd. When used in a Ja-containing solvent-based binder, an amino-modified silicone oil having a group that can react with the crosslinking agent of the binder (for example, a group that can react with isocyanate) is also emulsified and dispersed in a water-soluble binder. If so, use carboxy-modified silicone oil (for example, Shin-Etsu silicone (
Co., Ltd. (trade name: X-22-3710) is effective.

Antifading agents may be used in the thermal transfer dye-providing material and the thermal transfer image-receiving material. Antifading agents include, for example, antioxidants, ultraviolet absorbers, or certain metal complexes. When an antifading agent is used in the thermal transfer dye-providing material, it may be included in the dye-providing layer, or it may be provided in an area on the support separate from the area in which the dye-providing layer is provided.

Examples of antioxidants include chroman compounds, coumaran compounds, phenol compounds (for example, hindered phenol N), hydroquinone derivatives, hindered amine derivatives, and spiroindane compounds. Compounds described in JP-A-61-159644 are also effective.

Benzotriazole compounds (
U.S. Patent No. 3.533.794, etc.), 4-thiazolidone compounds (U.S. Pat. No. 3.352681, etc.),
Benzophenone compounds (JP-A No. 56-2784, etc.), other JP-A-54 No. 48535, JP-A No. 62-136
There are compounds described in No. 641, No. 61-88256, and the like. Further, the ultraviolet absorbing polymer described in JP-A No. 62-260152 is also effective.

As metal complexes, U.S. Pat. No. 4,241,155;
No. 4.245.018, columns 3 to 36, No. 4.25 of the same
No. 4,195, columns 3 to 8, JP-A-62-174741, JP-A-61-88256, pages (27)-(29), Japanese Patent Application No. 1983-234103, JP-A No. 62-31096, Japanese Patent Application No. 1983 There are compounds described in No.-230596 and the like.

Examples of useful anti-fading agents are disclosed in JP-A No. 62-215272 (
125) to (137).

The anti-fading agent for preventing fading of the dye transferred to the image-receiving material may be included in the image-receiving material in advance, or it may be supplied to the image-receiving material from the outside by a method such as transfer from a dye-donating material. You can.

The above antioxidants, ultraviolet absorbers, and metal complexes may be used in combination.

The layers constituting the thermal transfer dye-providing material and the thermal transfer image-receiving material used in the present invention may be hardened with a hardening agent.

When curing organic solvent-based polymers, JP-A-61
Hardeners described in Japanese Patent No. 199997 and No. 5B-215398 can be used. For polyester resins, it is particularly preferable to use isocyanate-based hardeners.

For curing water-soluble polymers, U.S. Patent No. 4.678.7
No. 39, column 41, JP-A-59-116655, JP-A No. 62
Hardeners described in Japanese Patent Nos. 245261 and 61-18942 are suitable for use.

More specifically, aldehyde hardeners (formaldehyde, etc.), aziridine hardeners, epoxy hardeners (bis(vinylsulfonylacetamide)ethane, etc.), N
-Methylol hardeners (dimethylol urea, etc.) or polymer hardeners (compounds described in JP-A-62-234157, etc.).

The thermal transfer image-receiving material may contain a fading inhibitor as described above in advance.

Various surfactants can be used in the constituent layers of the thermal transfer dye-providing material and the thermal transfer image-receiving material for the purposes of coating aids, improving peelability, improving slipperiness, preventing electrification, accelerating development, and the like.

Nonionic surfactants, anionic surfactants.

Amphoteric surfactants and cationic surfactants can be used. Specific examples of these are JP-A-62-173463,
It is described in No. 62-183457 and the like.

In addition, when dispersing substances that can accept heat-transferable dyes, mold release agents, anti-fading agents, ultraviolet absorbers, optical brighteners, and other hydrophobic compounds in a water-soluble binder, the interface is used as a dispersion aid. It is preferable to use surfactants; for this purpose, in addition to the above-mentioned surfactants, JP-A-59-15763
The surfactants described on pages 37-38 of No. 6 are particularly preferably used.

The constituent layers of the thermal transfer dye-providing material and the thermal transfer image-receiving material may contain an organic fluoro compound for the purpose of improving slipperiness, preventing static electricity, improving releasability, etc. Representative examples of organic fluoro compounds include Japanese Patent Publication No. 57 -9053 No. 8 to 1711
4. JP-A-61-20944, JP-A No. 62-135826
Hydrophobic fluorine compounds such as oily fluorine compounds such as fluorine oil, or solid fluorine compound resins such as tetrafluoroethylene resin are mentioned.

A matting agent can be used in the thermal transfer dye-providing material and the thermal transfer image-receiving material. As a matting agent, silicon dioxide, polyolefin, polymethacrylate, etc.
In addition to the compounds described on page 29 of No. 1-88256, Japanese Patent Application No. 110064/1988, such as benzoguanamine resin beads, polycarbonate resin beads, and AS resin beads,
There is a compound described in No. 62-110065.

In the present invention, a thermal transfer dye-providing material is superimposed on a thermal transfer image-receiving material, and thermal energy is applied according to image information from either side, preferably from the back side of the thermal transfer dye-providing material, using a heating means such as a thermal head. Thereby, the dye in the dye-donating layer can be transferred to the thermal transfer image-receiving material depending on the magnitude of heating energy, and a color image with excellent clarity and resolution and gradation can be obtained. Further, the anti-fading agent can also be transferred in the same manner.

The heating means is not limited to a thermal head, and known means such as a laser beam (for example, a semiconductor laser), an infrared flash, a thermal pen, etc. can be used.

In the present invention, by combining the thermal transfer dye-providing material with the thermal transfer image-receiving material, images can be printed by printing using various thermal printing printers, by facsimile, or by magnetic recording, magneto-optical recording, optical recording, etc. It can be used to create prints from , television, and CRT screens.

For details on the thermal transfer recording method, see Japanese Patent Application Laid-Open No. 60-348.
You can refer to the description in No. 95.

(Left below) (Example) In the following Examples and Comparative Examples, the production of a thermal transfer dye-providing material and a thermal transfer image-receiving material, printing using both materials, and testing of a thermal transfer image-receiving material were conducted as follows.

Example 1 (Preparation of thermal transfer dye-providing material) A support with a thickness of 6 μm and whose back surface was subjected to heat-resistant slipping treatment.
using a polyethylene terephthalate film (manufactured by Kijin), using the dyes listed in Table 1 on the surface of the film,
A thermal transfer dye-providing material was prepared by applying a coating composition for a thermal transfer dye-providing layer having the following composition by wire bar coating to a dry thickness of 1.5 μm.

] Dye xg Polyvinyl butyral resin (electrochemical type Denka Butyral 500-A) yg Toluene
40ail methyl ethyl ketone 40d polyisocyanate (Takene 1-DIION manufactured by Sotoen Yakuhin) (0,10ym1) 1/10 injection of polymer (preparation of thermal transfer image receiving material) Synthetic paper with a thickness of 150 μm (made by Tamago Yuka, YU) as a base material
A thermal transfer image-receiving material (PO-FP, -150) was prepared by coating the surface of the image-receiving layer coating composition (1) with the following composition by wire bar coating to a dry thickness of 8) tm. 1) was formed. Drying was performed for 30 minutes in an oven at a temperature of 100"C after temporary drying with a hair dryer.

Polyester resin (Vylon-280 manufactured by Toyobo Co., Ltd.) 22 g Polyisocyanate (KP-90: manufactured by Dainippon Ink Chemical Co., Ltd.) 4 g Amino-modified silicone oil (KF-857 manufactured by Shin-Etsu Silicone Co., Ltd.) 0.5 g Methyl ethyl ketone 85 Synthetic toluene
E15d Methylpropylene glycol Table 1 5- Yellow (2) Magenta (4) Cyan (2) m, p, 185°C m, p, 179°C The dye-donating material and image-receiving material obtained as above were combined. The dye-providing layer and image-receiving layer are stacked so that they are in contact with each other, and a thermal head is used from the support side of the dye-providing material to give an output of 0.25.
Thermal transfer was carried out under the conditions of W/dot, pulse width of 0°15 to 15 m5 ec, and dot density of 6 dots/1 ffl to obtain a recorded image on the image-receiving material.

Table 2 shows the recorded images obtained in the case of the present invention and in the comparative example. In addition, these dye-providing materials were heated at 50°C for 1
The precipitation of the dye after being placed for 4 days was examined using a microscope. The results are shown in Table 2.

These results show that the dye-providing material of the present invention has a higher maximum transfer density than the comparative example, and also has a higher transfer density at low energy.

Further, no precipitation of dye was observed during long-term storage.

Example 2 A thermal transfer dye-providing material was prepared using the resin shown in Table 3 instead of the polyvinyl butyral resin in the thermal transfer dye-providing layer coating composition of Example-1.

When thermal transfer was performed using the same image-receiving material as in Example 1, a high-density image recording was obtained. Furthermore, the storage stability of the dye-providing material was also excellent.

Table 3 Example-3 (Preparation of thermal transfer image-receiving material (2)) Resin-coated paper was prepared by laminating polyethylene to a thickness of 15μ and 25μ on both sides of a 200μ paper, and the following composition was applied to the 15μ thick laminated side. The paint composition for the image-receiving layer is coated with a wire bar to a dry thickness of l.
Coat it so that it has a thickness of Oμ, and dry it to form a thermal transfer image-receiving material (2
) was created.

Coating composition for image-receiving layer Polyester resin NαI 25g Amine-modified silicone oil (KF857: manufactured by Shin-Etsu Silicone) 0.8g Polyisocyanate (KP-90: manufactured by Dainippon Ink) 4g Methyl ethyl ketone 100-Toluene
100-Epoxy modified silicone oil (KF-100T: Shin-Etsu Silicone) 0.5g Methyl ethyl ketone 85dToluene 85-Cyclohexanone 301i! When thermal transfer was carried out in the same manner as in Example 1, an image recording with high transfer density was obtained.

Example 4 (Preparation of thermal transfer image-receiving material (4)) An organic solvent solution of a dye-receiving polymer having the composition of (B) was emulsified and dispersed in an aqueous gelatin solution of the following composition (A) using a homogenizer to obtain gelatin as a dye-receiving material. A dispersion was prepared.

(A) Gelatin aqueous solution Gelatin 2.3g Dodecylbenzenesulfonic acid 20m Sodium (5% aqueous solution) Water (B) Dye-receptive polymer solution Polyester resin (Toyobo: Vylon 300) Carboxy-modified silicone oil (Shin-Etsu Silicone: X-22 -3710) Methyl ethyl ketone 0ml 7.0g 0゜ 7g 0d Toluene 10dTriphenyl phosphate) 1.5g Fluorine surfactant of the dispersion thus prepared (a) CzPq
A solution of 0.5 g of SOJCIhCOOK dissolved in 10 d of a mixed solvent of water (CsPt)/methanol (1:1) was added to prepare a coating composition for a receptor layer.

This coating composition was corona discharged onto the surface to a thickness of 150p.
m synthetic paper (manufactured by Tamago Yuka: YLJPO-3GG-15
0) by a wire bar coating method to a wet film thickness of 75 μm and dried.

When thermal transfer was performed using the obtained image-receiving material and the dye-providing material of the present invention described in Examples 1 and 2, high-density recording was obtained.

Claims (1)

[Claims] 1. A thermal transfer dye-providing material comprising, on a support, a dye-donating layer containing at least a substantially amorphous heat-transferable dye and a binder in an amount of 30 to 100% by weight relative to the dye.