JPH08197862A - Image receiving sheet material and transfer image forming method - Google Patents

Abstract

PURPOSE: To achieve the formation of a multi-gradation, high quality color image with a good recording sensitivity, dot quality, and gradation reproducing property, in particular, having no stickiness on the surface of an image receiving sheet and defect of dusts caused thereby in a pigment transfer method of only areal gradation. CONSTITUTION: This image receiving sheet material is used for forming a transfer image by heat-transferring an ink layer from a transfer material having a heat-transferable ink layer to an image receiving sheet material, and then retransferring it to a permanent support, wherein the image receiving sheet material has at least a double layer on the support, and at least one receiving layer is transferred on the permanent support, and the layer stayed on the support of the image receiving sheet contains a plasticizer of a molecular weight of 1000 or more, and further the Young's modulus is in the range of from 10 kgf.cm<-2> to 10000kgf.cm<-2> in a room temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention transfers an image-receiving sheet material useful in a thermal transfer recording system and a thermal ink layer containing a coloring material onto the image-receiving sheet material by using a thermal head or by irradiating a laser beam. To form an image and then retransfer to form an image on a permanent support.

[0002]

2. Description of the Related Art With the progress of office automation in recent years, copying machines, printers and the like utilizing various recording systems such as an electrophotographic system, an inkjet system and a thermal transfer recording system have been used according to their respective applications. A coloring material is used for this image formation, and a recording medium such as a paper or a film sheet is usually used by an action such as melting, melting or evaporating or sublimating a coloring material-containing composition, adhesion, adsorption or dyeing. Etc. are getting the image over.

Of these, the thermal transfer recording system has advantages such as easy operation and maintenance, downsizing of the apparatus, and cost reduction. The following two types of thermal transfer recording methods are conventionally known.
That is, a heat-melting type in which a transfer sheet having a meltable ink layer on a support is heated imagewise (imagewise) by a laser or a thermal head to melt-transfer the meltable ink to a heat-sensitive transfer recording image-receiving sheet. Sublimation in which the thermal diffusible dye is diffuse-transferred to an image-receiving sheet for thermal transfer recording by using a transfer method and an ink sheet for thermal transfer recording having an ink layer containing a thermal diffusible dye (sublimable dye) on a support. There are two types of dye transfer method.

The sublimation type dye transfer system can control the gradation of an image by changing the transfer amount of the dye according to the change of thermal energy of the thermal head.
By performing magenta and yellow overprinting, there is an advantage that a color image having a continuous change in color shading can be obtained. However, this method has the following problems. It mainly reproduces the gradation of the image by using the density gradation, and is suitable for some purposes for consumer who prefer the gradation similar to the photograph, but for example, the gradation is reproduced only by the area gradation. It is not suitable for color proofing applications used in the printing field. Since the image formation uses dye sublimation, the edge sharpness of the finished image is not sufficient, and the solid density of the thin line is lower than that of the thick line. This is a big problem especially with respect to the quality of character images. The durability of the image is low, and its application to fields requiring heat resistance and light resistance is limited. Since the thermal recording sensitivity is lower than that of the heat-melt transfer method,
It is not suitable as a high-speed recording material using a high resolution thermal head, which is expected in the future. The sensitive material is more expensive than the heat-melt transfer material.

On the other hand, the heat-melt type transfer method has advantages such as high heat sensitivity, excellent light resistance of images, and low cost of materials, as compared with the sublimation type dye transfer method. It has the following drawbacks. Since gradation reproduction is not density gradation but binary recording, multi-gradation is poor. Usually, a low melting point crystalline wax is used as a binder for the ink layer, so the resolution decreases due to bleeding during thermal printing,
The strength of the transferred image is low. When crystalline waxes are used, it is difficult to obtain a transparent image due to light scattering of the crystalline phase.

In view of such a situation, the present inventors differ from the conventional sublimation dye transfer system and heat fusion transfer system,
As a new heat-sensitive recording material capable of obtaining a multi-gradation pigment color image only by area gradation of binary recording, a heat-adhesive thin film peeling method was previously proposed (Japanese Patent Application No. 5-263695). According to this method, a multi-tone high-quality color image or monochrome image, which has greatly improved the problems of the conventional thermal transfer recording method by the area-tone-only pigment transfer method, has been achieved. In addition, it is possible to develop into the card field, outdoor display field, meter display field, etc. by taking advantage of the light resistance of color proofs, block manuscripts, and pigments in the printing field.

On the other hand, various proposals have been made for materials to be transferred used in these various thermal transfer recording materials. When plain paper is used as an image receiving medium of the sublimation dye transfer system, dyeing is not likely to occur and the density of the recorded image is low, and the fading is significantly reduced with time. Therefore, an image receiving paper in which an image receiving layer containing a thermoplastic resin as a main component is provided on plain paper has been proposed, and various improvements in recording sensitivity, resolution, sharpness, color density, etc. have been studied. In addition, it is possible in principle to use plain paper for the transfer material of the heat melting type transfer method, but defects such as uneven transfer and missing dots are likely to occur due to the smoothness of the transfer surface and ink acceptability. It is a difficult point. Therefore, various image receiving materials have been studied in order to improve surface smoothness, ink transfer acceptance, fixing ability, gradation, sharpness, and the like. Here, as a support for these various image receiving media, a dedicated transfer material such as plain paper, synthetic paper, a synthetic resin film or a white base filled with a white pigment is used. Therefore, in this method, the transferable material capable of forming an image is limited to a dedicated paper or a resin sheet provided with an image receiving layer, so that the quality is insufficient for proof use requiring a printed matter approximation. . Further, a method of transferring a recorded image to any desired transfer-receiving support is also known. Japanese Patent Application Laid-Open No. 52-27642 describes a method in which a transfer layer is heated and adhered to an intermediate receptor and then the adhered transfer material is transferred to an object to be transferred such as paper. However, nothing is said about improvement of image quality. Has not been done.

Further, in order to improve the cushioning property of the image receiving sheet to improve the recording sensitivity, dot quality and gradation reproducibility, for example, a technique of adding a plasticizer to the binder to control the cushioning property. It has been known. As an example of the plasticizer, P1034 of Chemical Handbook Application Edition (Chemical Society of Japan)
It is possible to select and use from among those listed in. However, most of the generally known plasticizers have a molecular weight of about several hundreds, and although the cushioning properties can be satisfied by using these,
Due to the migration of the plasticizer onto the surface of the image-receiving layer, the surface of the image-receiving sheet becomes extremely sticky, and there arises a problem that sticking occurs and dust defects increase.

As described above, various image-receiving sheet materials have been proposed as the transfer material of the heat-sensitive transfer recording material, but in order to obtain a multi-gradation high-quality color image by the pigment transfer method of area gradation only. Was not enough. Specifically, the recording sensitivity, dot quality, and gradation reproducibility are inferior.In particular, when trying to increase the thermal recording sensitivity, the thermal adhesion temperature of the image receiving layer is lowered and the tackiness increases, and sticking phenomenon or recording due to stickiness occurs. A problem occurs in the adhesion resistance in the later image storage, and dust defects increase. Further, when used as a color proof for color proofing, there is a big problem in the approximation of printed matter such as reproduction of texture of actual printing paper.

[0010]

The object of the invention is to remedy the abovementioned drawbacks. In other words, it is excellent in recording sensitivity, dot quality, and gradation reproducibility with the pigment transfer method that uses only area gradation.
In particular, the present invention provides a transfer image forming method and a thermal transfer recording image receiving sheet material capable of forming a multi-gradation high quality color image without stickiness on the surface of the image receiving sheet and dust defects accompanying it. Further, the present invention provides an image-receiving sheet material for heat-sensitive transfer recording, which can be transferred onto a printing actual paper and is excellent in the approximation of the printed matter such as reproduction of the texture of the actual printing paper, gloss of the image, and the like, and a transfer image forming method.

[0011]

The object of the present invention is (1).
In an image-receiving sheet material used for forming a transfer image, in which an ink layer is thermally transferred from a transfer material having a heat-transferable ink layer to an image-receiving sheet material, and then retransferred to a permanent support,
The image-receiving sheet material has at least two image-receiving layers on a support, at least one of the image-receiving layers is transferred to a permanent support, and the layer remaining on the support of the image-receiving sheet has a molecular weight of 10
Contains a plasticizer of 00 or more and has a Young's modulus of 1 at room temperature.
Receiving sheet, characterized in that from 0 kgf · cm ^-2 in the range of 10000 kgf · cm ^-2 - DOO material, and, (2)
30 to 70 parts by weight of pigment, 25 to 6 provided on a support
The image transferable ink layer according to (1) above, which contains 0 part by weight of an amorphous organic high molecular weight polymer having a softening point of 40 to 150 ° C. and has a film thickness of 0.2 μm to 1.0 μm. By a transfer image forming method, which comprises closely contacting with a sheet material, forming an ink image on the image receiving sheet material by thermal transfer, and then transferring the ink image and at least one image receiving layer on a permanent support. Achieved Hereinafter, the present invention will be described in detail.

As the support of the image-receiving sheet, a substance that is chemically and thermally stable and has flexibility is used. It may be actinic radiation transparent, if necessary. Specifically, polyolefins such as polyethylene and polypropylene, polyvinyl halides such as polyvinyl chloride and polyvinylidene chloride, cellulose derivatives such as cellulose acetate, nitrocellulose, cellophane, polyamides, polystyrene, polycarbonate, polyimides,
Depending on the case, paper laminated with polyethylene film can be used. Among these, particularly preferred ones are
The biaxially stretched polyethylene phthalate film is excellent in dimensional stability and permeability, but is not limited thereto.

At least two image-receiving layers are provided on the support, preferably a layer in contact with the support (hereinafter referred to as "image-receiving layer") and a layer provided thereon (hereinafter referred to as "image-receiving two layers"). Note). In order to increase the adhesive strength between the support and the image receiving layer, it is possible to provide a surface treatment such as corona discharge treatment or glow discharge treatment, or to provide an undercoat layer. Any undercoat layer may be used as long as it enhances the adhesive force between the support and the image receiving layer, but a silane coupling agent or the like is particularly preferable.

Next, the image receiving layer will be described. The Young's modulus of the image receiving layer at room temperature is 10 kg · f / cm ² to 1
It is preferably 0000 kg · f / cm ² or less.
The reason for this is that the use of a polymer having a small Young's modulus causes the image-receiving layer to have cushioning properties, whereby the recording sensitivity, dot quality, and gradation reproducibility can be improved. Further, even when foreign matter such as dust is present between the heat-sensitive recording material and the image-receiving sheet material during recording, there is an advantage that an image defect is less likely to occur because the image-receiving layer has more cushioning property. Further, after the image is transferred to the image-receiving sheet material, the layer is embedded according to the unevenness of the paper when retransferred onto the actual printing paper such as paper by heat and pressure,
An image having a surface gloss similar to that of a printed matter can be obtained without improving the adhesion to paper and performing a special treatment such as matting on the surface after peeling the two image receiving layers. Particularly preferred Young's modulus at room temperature is 10 kg · f / cm ² to 200 kg · f / c
m ² or less, and within this range, the thickness of the first layer is 50
It is suppressed to less than μm, which is advantageous during manufacturing coating. When the Young's modulus value is smaller than 10 kg · f / cm ² ,
After all, there is a problem in that it is very difficult to handle due to the tackiness during coating and manufacturing. Young's modulus is 10000k
When g · f / cm ² or more, the cushioning property of the image receiving layer is small, so that the film thickness inevitably becomes a thick film to compensate for the cushioning property, resulting in a problem that the suitability for manufacturing is lost.

Specific examples of the material include polyolefins such as polyethylene and polypropylene, ethylene copolymers such as ethylene and vinyl acetate or ethylene and acrylate, polyvinyl chloride, and vinyl chloride copolymers such as vinyl chloride and vinyl acetate. , Polyvinylidene chloride, vinylidene chloride copolymer, poly (meth) acrylic acid ester, copolymerized nylon, polyamide resin such as N-alkoxymethylated nylon, synthetic rubber, at least one organic polymer substance such as chlorinated rubber Preferably. Of these, polyvinyl chloride having a degree of polymerization of 200 to 2000, a copolymer of vinyl chloride and vinyl acetate, a copolymer of vinyl chloride and vinyl alcohol, a copolymer of vinyl chloride, vinyl acetate and maleic acid, etc. Are particularly preferred. The reason for this is that polyvinyl chloride and vinyl chloride copolymer have (1) almost no tackiness at room temperature, (2) relatively low elastic modulus, and can easily follow irregularities of a transferred image during thermal transfer, (3) A plasticizer with good compatibility is abundant and it is easy to control the substantial elastic modulus, and (4) it is easy to control the interlayer adhesion force by the effect of the hydroxyl group or the carboxyl group in the copolymerization component, Etc. Of course, various polymers, adhesion improvers, surfactants, and release agents may be added to these organic polymers in order to adjust the adhesive strength with the image receiving sheet support or the image receiving bilayer. Further, for the purpose of lowering the elastic modulus, it is also very effective to use a part of the tacky polymer in combination as long as the tackiness does not occur at room temperature.

When a vinyl chloride resin is used, an organotin stabilizer such as butyltin stabilizer or octyltin stabilizer, which is generally known as a stabilizer for polyvinyl chloride and vinyl chloride copolymer, is used. It is also effective to add.

Since the Young's modulus alone is large in each of the above binders, the cushioning property is insufficient, and a plasticizer or the like is added to supplement the cushioning property. Molecular weight is 1
Examples of more than 000 plasticizers that do not easily migrate to the surface of the image-receiving sheet include polyfunctional acrylic monomers and urethane oligomers for use as polyester plasticizers and plasticizers of monomers. Examples of polyester-based plasticizers include adipic acid-based, phthalic acid-based, sebacic acid-based, epoxy-based, trimellitic acid-based, pyromellitic acid-based, sebacic acid-based, citric acid-based, and among others, adipic acid-based polyester plasticizers Agents, phthalic acid plasticizers, sebacic acid plasticizers are preferred. As the polyfunctional acrylate-based monomer, the following 6-functional acrylic monomers and dimethacrylates can be preferably used.

[0018]

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As an example of the urethane-based oligomer, it is possible to use a polymer of a common isocyanate with polyetherdiol or polyesterdiol, and aromatic urethane acrylate or fat. The use of group urethane acrylate oligomers is preferred.

Further, other preferable examples of the plasticizer include a copolymer of ethylene group and vinyl ester group of carboxylic acid, and a copolymer containing ethylene group and acrylate group. Examples of the carboxylic acid include saturated aliphatic monocarboxylic acid such as acetic acid, propionic acid, butyric acid, and stearic acid, and also include unsaturated fatty acid, carbocyclic carboxylic acid, and heterocyclic carboxylic acid. Examples of acrylic acid esters include methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, methoxy ethyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate hexyl methacrylate, decyl octyl methacrylate, lauryl methacrylate, Stearyl methacrylate, dimethylaminoethyl methacrylate, methacrylamide, and the like can be mentioned. Further, as the component of the copolymer, a multi-component system can be appropriately used according to the purpose of use.

The above-mentioned plasticizer has the effect of the present invention only when a polymer having a molecular weight of 1000 or more and having a good cushioning property is used. When the molecular weight is smaller than this range, the plasticizer is likely to migrate to the surface of the image receiving sheet, which increases stickiness on the surface of the image receiving sheet and causes problems such as sticking and dust defects. Also, it is not good if the molecular weight is also large, compatibility with the binder is important, and if the molecular weight becomes large, it becomes difficult to be compatible with various binders, and the cushioning property is poor, so the film thickness must be increased. There is a problem that it does not happen.

The plasticizer to be added preferably has a molecular weight of 5000 or less, but even if the molecular weight is 5000 or more, if the Young's modulus of the layer falls within the range of 10 to 10000 kg · f / cm ² , the molecular weight must be within this range. There is no.

If necessary, by adding acrylic rubber or linear polyurethane as an auxiliary binder to a layer having cushioning properties such as an image-receiving layer, the amount of the plasticizer added can be reduced and the surface of the plasticizer can be reduced. It is possible to suppress bleeding and prevent deterioration of adhesion resistance due to dust defects and deterioration of surface tackiness.

The thickness of the organic polymer substance of the image receiving layer is 1 μm
To 50 μm is preferable, and 5 μm to 30 μm is particularly preferable. One of the reasons for this is that when the image transferred on the image-receiving sheet material is transferred to the permanent support, it must be thicker than the irregularities on the surface of the permanent support. The second reason is that a four color image is This is because it is necessary to have a thickness that can sufficiently absorb the relief step in the overlapping portion. The third reason is to obtain sufficient cushioning property.

Next, the image receiving two layers provided thereon will be described. The purpose of the image-receiving two-layer is to peel off the image-receiving sheet material during retransfer to the permanent support to cause delamination between the image-receiving layer and the image-receiving two layers, leaving only a thin image-receiving two-layer on the image on the permanent support. The purpose is to obtain an image that approximates the gloss of the actual print without subjecting it to a special matting treatment due to the unevenness of the permanent support. The second purpose is to improve the scratch resistance of the image. Although various substances can basically be used as the material of the image receiving bilayer, a polyvinyl butyral resin and a polymer compound having the following general formula (1) as a repeating unit are contained as an organic polymer substance constituting the image receiving bilayer. Preferably. General formula (1)

[0026]

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The polymer compound of the general formula (1) is obtained by polymerizing the monomer represented by the general formula (2) according to a conventional method in a suitable solvent or in the absence of a solvent in the presence of a polymerization initiator, or another monomer. It is obtained by copolymerizing with the body. General formula (2)

[0028]

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When A in the general formula (2) is a substituent having an amide bond, for example, CONHR ₂ , CONR ₂ R ₃
Is mentioned. R ₂ and R ₃ are each independently hydrogen, or an alkyl group having 1 to 18 carbon atoms, an aryl group having 6 to 20 carbon atoms (the alkyl or aryl group is a hydroxy group, or 1 carbon atom).
One or more of an alkoxy group of ~ 6, halogen, and cyano group,
And optionally substituted with a combination of two or more of these), R ₂ and R ₃ are bonded to each other to form an alkylene or aralkylene having 1 to 20 carbon atoms (the alkylene or aralkylene may have a branch, Further, ether bond, -OCO-, -C
OO-, and a combination of two or more thereof may be included), and when A is a nitrogen-containing heterocycle, examples thereof include imidazoles, pyrrolidones, pyridines, carbazoles, etc. It may be substituted with an alkyl group having 5 carbon atoms, an aryl group having 6 to 10 carbon atoms, a halogen, a cyano group or a combination of two or more thereof.

A more preferable range of A in the general formula (1) is CONHR ₂ ', CON in the case of a substituent having an amide bond.
R ₂ 'R ₃ '; R ₂ 'and R ₃ ' are each independently hydrogen or carbon number 1
Alkyl group having 10 to 10 aryl groups having 6 to 15 carbon atoms (the alkyl and aryl groups are hydroxy groups having 1 to 6 carbon atoms), and when A is a nitrogen-containing heterocycle, imidazoles and triazoles can be mentioned. , They have 1 to 1 carbon atoms
It may be substituted with an alkyl group having 5 or an aryl group having 6 to 10 carbon atoms.

Specific examples of the general formula (1) include (meta).
Acrylamide, N-alkyl (meth) acrylamide (as the alkyl group, for example, methyl group, ethyl group,
Propyl group, butyl group, t-butyl group, heptyl group, octyl group, ethylhexyl group, cyclohexyl group, hydroxyethyl group, benzyl group and the like), N-aryl (meth) acrylamide (as the aryl group, for example, phenyl Group, tolyl group, nitrophenyl group, naphthyl group, hydroxyphenyl group and the like), NN-dialkyl (meth) acrylamide (as the alkyl group, for example, methyl group, ethyl group, butyl group, isobutyl group, ethylhexyl group) Group, a cyclohexyl group, etc.), NN-diaryl (meth) acrylamide (the aryl group includes, for example, a phenyl group), N-
Methyl-N-phenyl (meth) acrylamide, N-hydroxyethyl-N-methyl (meth) acrylamide,
N-2 acetamidoethyl-N-acetyl (meth) acrylamide, N- (phenylsulfonyl) (meth) acrylamide, N- (p-methylphenylsulfonyl)
(Meth) acrylamide, 2 and 3 and 4-hydroxyphenyl acrylamide, (meth) acryloylmorpholine, 1-vinyl imidazole, 1-vinyl-2-
Examples thereof include methylimidazole, 1-vinyltriazole, 1-vinyl-3,5-dimethylimidazole, vinylpyrrolidone, 4-vinylpyridine and vinylcarbazole.

Specific examples of other monomers copolymerizable with the monomer represented by the general formula (2) include (meth) acrylic acid esters, (meth) acrylamides, allyl compounds and vinyl ethers. Examples thereof include compounds having a polymerizable unsaturated bond selected from the group consisting of compounds, vinyl esters, styrenes, crotonic acid esters and the like. Specifically, (meth) acrylic acid esters such as alkyl (meth) acrylate or substituted (meth) alkyl acrylate,
(For example, methyl (meth) acrylate, ethyl (meth)
Acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, butyl (meth) acrylate, amyl (meth) acrylate, hexyl (meth)
Acrylate, cyclohexyl (meth) acrylate,
Ethylhexyl (meth) acrylate, octyl (meth) acrylate, t-octyl (meth) acrylate, chloroethyl (meth) acrylate, allyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 2,
2-dimethyl-3-hydroxypropyl (meth) acrylate, 5-hydroxypentyl (meth) acrylate, trimethylolpropane mono (meth) acrylate, pentaerythritol mono (meth) acrylate,
Benzyl (meth) acrylate, methoxybenzyl (meth) acrylate, chlorobenzyl (meth) acrylate, furfuryl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, phenoxyethyl (meth) acrylate, etc., aryl (meth) acrylate (for example, Phenyl (meth) acrylate, cresyl (meth) acrylate, naphthyl (meth) acrylate, etc.), styrenes such as styrene, alkylstyrenes (eg methylstyrene, dimethylstyrene, trimethylstyrene, ethylstyrene, diethylstyrene, isopropylstyrene, butylstyrene) Hexyl styrene, cyclohexyl styrene, decyl styrene, benzyl styrene, chloromethyl styrene, trifluoromethyl styrene, ethoxy Methylstyrene, etc. acetoxymethyl styrene), alkoxy styrene (e.g., methoxy styrene, 4-methoxy-3-methyl styrene, dimethoxy styrene, etc.), halogenoalkyl styrene (e.g. chlorostyrene, dichloro styrene, trichloro styrene,
Tetrachlorostyrene, pentachlorostyrene, bromostyrene, dibromostyrene, iodostyrene, fluorostyrene, trifluorostyrene, 2-bromo-4-
Trifluorostyrene, 4-fluoro-3-trifluoromethylstyrene, etc.), hydroxystyrene, etc .; crotonic acid esters, for example, alkyl crotonic acid alkyl (eg, butyl crotonic acid, hexyl crotonic acid, glycerin monocrotonate, etc.), (meth ) Acrylic acid, crotonic acid, itaconic acid, acrylonitrile.

Preferred specific examples of the polymer having the repeating unit represented by the general formula (1) are N, N
-Dimethylacrylamide / butyl (meth) acrylate-
Copolymer, N, N-dimethyl (meth) acrylamide / 2-ethylhexyl (meth) acrylate copolymer,
N, N-dimethyl (meth) acrylamide / hexyl (meth) acrylate copolymer, N-butyl (meth) acrylamide / butyl (meth) acrylate copolymer,
N-butyl (meth) acrylamide / 2-ethylhexyl (meth) acrylate copolymer, N-butyl (meth)
Acrylamide / hexyl (meth) acrylate copolymer, (meth) acryloylmorpholine / butyl (meth)
Acrylate copolymer, (meth) acryloylmorpholine / 2-ethylhexyl (meth) acrylate copolymer, (meth) acryloylmorpholine / hexyl (meth) acrylate copolymer, 1-vinylimidazole /
Butyl (meth) acrylate copolymer, 1-vinylimidazole / 2-ethylhexyl (meth) acrylate copolymer, 1-vinylimidazole / hexyl (meth) acrylate copolymer, etc. Can be mentioned. The content of the unit of general formula (1) is preferably 10 to 100 mol%, more preferably 30 to 80 mol%. If the content of the unit of the general formula (1) is less than 10 mol%, the image quality is poor. The preferable molecular weight range is 1000 to 200.
000, and more preferably 2000 to 100,000. If the molecular weight is less than 1000, it is difficult to produce, and if it exceeds 200,000, the solubility in a solvent decreases.

There are various resins which can be used in combination with these resins, for example, polyolefins such as polyethylene and polypropylene, ethylene and vinyl acetate, ethylene and acrylic ester, ethylene copolymers such as ethylene and acrylic acid, and polyvinyl chloride. , Vinyl chloride copolymers such as vinyl chloride and vinyl acetate, polyvinylidene chloride, vinylidene chloride copolymer, polystyrene, styrene copolymers such as styrene and maleate, vinyl acetate copolymer, butyral resin, modified Polyvinyl alcohol, copolymerized nylon, polyamide resin such as N-alkoxymethylated nylon, synthetic rubber, chlorinated rubber, phenol resin, epoxy resin, urethane resin, urea resin, melamine resin, alkyd resin, maleic acid resin, hydroxys Ren copolymer, sulfonamide resins, ester gum, a cellulose resin, rosin, and the like.

The amount of the compound of the general formula (1) added to these resins is preferably 5 to 50% by weight, and if added in excess of this amount, the surface of the image-receiving bilayer becomes sticky and causes a trouble in handling. A particularly preferable range is 10 to 30% by weight.

Further, among these resins, other adhesion improvers, release agents, and
It goes without saying that a plasticizer, a surfactant and the like can be added. As the coating solvent used for the image receiving two layers, a coating solvent which does not dissolve or swell the resin used in the image receiving layer for the purpose of preventing the image receiving layer and the image receiving two layers from being mixed by permeation into the lower layer of the coating solvent during coating. It is necessary to use. For example, when a vinyl chloride resin, which is relatively soluble in various solvents, is used for the image receiving layer, it is preferable to use an alcohol or water-based coating solvent. The thickness of the two image receiving layers is 0.1 μm to 1
0 μm is preferable, and 0.5 μm to 5 μm is particularly preferable.
If the film thickness is too thick, the unevenness of the surface of the permanent support will be impaired, and the gloss will be excessive and the approximation of the printed matter will be impaired.

In order to cause delamination between the organic polymer substance of one image-receiving layer and the organic polymer substance of two image-receiving layers by peeling the image-receiving sheet material at the time of transfer to the permanent support, the balance of the adhesive force between the respective layers is required. Is important, but in addition to selection of coating solvent to prevent mixing during multilayer coating used in the present invention in controlling interlayer adhesion, a combination of hydrophilic polymer and lipophilic polymer or polar polymer and nonpolar polymer is used. Such as the selection of materials, adhesion improvers such as silane coupling agents, various additives having fluorine or silicone release cure, surfactants, plasticizers, etc. can be added to one or two image receiving layers. It is valid.

An intermediate layer may be provided between the image receiving layer and the image receiving two layers for the purpose of adjusting transferability and the like.

Next, a transfer material having an ink layer capable of thermal transfer (hereinafter referred to as "thermal transfer sheet") useful in the present invention will be described.

As the support of the thermal transfer sheet, various supports known as conventional melt transfer and sublimation transfer supports are used. A polyester film subjected to a release treatment is particularly preferable.

As the pigment contained in the ink layer of the thermal transfer sheet, various known pigments can be used, and examples thereof include carbon black, azo type, phthalocyanine type, quinacridone type, thioindigo type, anthraquinone type and isoindoline type pigments. Can be mentioned. These can be used in combination of two or more, and a known dye may be added for adjusting the hue.

The amorphous organic polymer binder having a softening point of 50 ° C. to 150 ° C. contained in the ink layer of the thermal transfer sheet is, for example, butyral resin, polyamide resin, polyethyleneimine resin, sulfonamide resin, polyester polyol resin. , Petroleum resin, styrene, vinyltoluene,
Styrene and its derivatives such as α-methylstyrene, 2-methylstyrene, chlorostyrene, vinyl benzoic acid, sodium vinylbenzene sulfonate, and aminostyrene, substituted homopolymers and copolymers, methyl methacrylate, ethyl methacrylate and butyl. Methacrylate, methacrylic acid esters such as hydroxyethyl methacrylate and methacrylic acid, methyl acrylate, ethyl acrylate, butyl acrylate, acrylic acid esters such as α-ethylhexyl acrylate and acrylic acid, butadiene, dienes such as isoprene, acrylonitrile, vinyl ethers, Use of vinyl monomers such as maleic acid and maleic acid esters, maleic anhydride, cinnamic acid, vinyl chloride and vinyl acetate, or a copolymer with other monomers. You can Two or more kinds of these resins may be mixed and used.

Of these, a butyral resin and a styrene / maleic acid half ester resin are particularly preferable from the viewpoint of dispersibility which is a feature of the present invention described later. The softening point of these resins should be selected in the range of 40 ° C to 150 ° C. If the temperature exceeds 150 ° C, the thermal recording sensitivity will be low, while 40
If it is less than ℃, the ink layer has poor adhesion resistance.

From the viewpoint of improving the releasability of the ink layer from the support and the thermal sensitivity at the time of thermal printing, various releasing agents and softening agents are added to these ink layers in an amount of from 1% by weight to the total amount of the ink layer. It is also possible to add in the range of 20% by weight. Specifically, for example, higher fatty acids such as palmitic acid and stearic acid, fatty acid metal salts such as zinc stearate, fatty acid esters or partial saponification products thereof, fatty acid derivatives such as fatty acid amides, higher alcohols, polyhydric alcohols. Derivatives such as ether, waxes such as paraffin wax, carnauba wax, montan wax, beeswax, wood wax, and candelilla wax, viscosity average molecular weight of about 1,
000 to about 10,000 low molecular weight polyethylene, polypropylene, polybutylene, and other polyolefins, or olefin, α-olefins and maleic anhydride, organic acids such as acrylic acid and methacrylic acid, and low molecular weight vinyl acetate. Polymer, low molecular weight oxidized polyolefin, halogenated polyolefins, lauryl methacrylate, stearyl methacrylate, etc. Methacrylic acid ester having long alkyl side chain, acrylic acid ester or acrylic acid ester having perfluoro group, methacrylic acid ester alone or styrene Copolymers with vinyl monomers such as polydimethylsiloxanes, low-molecular-weight silicone resins such as polydimethylsiloxane and polydiphenylsiloxane, and silicone-modified organic substances, and ammonium salts having long-chain aliphatic groups, Cationic surfactants such as Jiniumu salt, or anion having a similar long chain aliphatic group, a nonionic surfactant, perfluoro-containing surfactants, etc., from 1
It is possible to select and use one or more species.

For the optical density of these heat transferable ink layers, the reflection density must be 1.0 or more when thermally transferred onto a white support for the reasons described above. The film thickness is preferably in the range of 0.2 μm to 1.0 μm. 1.
In a thick ink layer having a thickness of more than 0 μm, the gradation reproducibility due to only the area gradation is apt to be crushed in the shadow portion and the highlight portion is easily skipped, resulting in poor gradation reproducibility. On the other hand, if the film thickness is less than 0.2 μm, it is difficult to obtain a predetermined concentration.

In order to obtain a predetermined concentration with these thin films, the pigment contains 30 to 70 parts by weight of the pigment in the ink layer.
It is preferable that the amount of the amorphous organic polymer conjugate is 25 to 60 parts by weight, and the total amount of the releasing agent and the film softener added as necessary is 1 to 15 parts by weight. If the pigment ratio is less than this, it is difficult to obtain a predetermined density with the above-mentioned predetermined film thickness. Further, the particle size of the pigment needs to be 1.0 μm or less for 70% or more of the pigment. When the particle size is large, the transparency of the overlapping portion of each color at the time of color reproduction is impaired, and it becomes difficult to satisfy both the relationship between the film thickness and the density.

Regarding dispersion of these pigments in the amorphous organic polymer conjugate, various dispersion methods used in the coating field including ball mills are applied by adding an appropriate solvent.

The heat transferable ink layer is mainly composed of a pigment and an amorphous organic polymer combination, and has a higher pigment ratio than the conventional wax-melting type. Since the viscosity does not become as low as 10 ² to 10 ³ cps and is at least higher than 10 ⁴ cps at a temperature of 150 ° C., the present invention is applicable to the thermal adhesion of a receiving sheet, or in the case of color image formation. It can be said that it is a thin film peeling development type image formation utilizing thermal adhesion between ink layers. This combined with the effect of thinning the ink layer, while maintaining high resolution, enables wide gradation reproduction from the shadow part to the highlight part, and makes the edge sharpness good, Furthermore, by making it possible to transfer an image of 100%, for example, a small character of 4 points and the uniformity of the density of the solid portion were realized.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto.

[0050]

【Example】

Synthesis Example 1 <Synthesis of polymer compound (a)> 170 parts of propylene glycol monomethyl ether was heated and stirred under a nitrogen stream at 80 ° C. to obtain 2,2′-azobis (2,4-dimethylvaleronitrile). 07 parts was added and stirred for 30 minutes. Added to this were butyl acrylate 31.6 parts, N, N-dimethylacrylamide 24.4 parts and 2,2'-azobis (2,4-
0.07 part of dimethyl valeronitrile) was applied over 30 minutes. 30 minutes and 1 hour after the end of dropping,
0.15 parts of 2'-azobis (2,4-dimethylvaleronitrile) was added, respectively, and the mixture was further heated and stirred for 4 hours to obtain a 28% propylene glycol monomethyl ether solution of the following polymer compound (a). The weight average molecular weight was 13,000 (in terms of polystyrene).

Example 1 (Preparation of image-receiving sheet) Coating solutions for the image-receiving layer and image-receiving layer having the following compositions were prepared. (Coating liquid for image receiving layer) -Binder PVC / vinyl acetate copolymer 25 parts by weight (MPR-TSL, manufactured by Nisshin Chemical Co., Ltd.)-Plasticizer DPCA-120 (manufactured by Nippon Kayaku Co., Ltd.) 12 parts by weight Part (6-functional acrylate monomer, molecular weight 1947) ・ Surfactant (Brand name Megafac F-177P, 4 parts by weight manufactured by Dainippon Ink and Chemicals, Inc.) ・ Solvent Methyl ethyl ketone 75 parts by weight

(Coating Liquid for Image Receiving Two Layers) Binder 16 parts by weight of polyvinyl butyral (Denka Butyral # 2000-L, manufactured by Denki Kagaku Kogyo Co., Ltd.) 4 parts by weight of polymer compound (a) Surfactant (trade name: Megafac F-177P, 0.5 part by weight manufactured by Dainippon Ink and Chemicals, Inc.)-Solvent n-propyl alcohol 200 parts by weight

A polyethylene terephthalate (PET) film having a thickness of 100 μm is placed on a support, and the above-mentioned image-receiving layer coating solution of 300 rp is formed by using a spin coater (foamer).
m, and dried in an oven at 100 ° C. for 2 minutes.
The film thickness of the obtained image receiving layer was 20 μm.

The above image-receiving two-layer coating liquid was applied onto the above image-receiving layer at 200 rpm using a spin coater (foamer) and dried in an oven at 100 ° C. for 2 minutes. The film thickness of the obtained two image receiving layers was 2 μm.

(Preparation of Thermal Transfer Sheet) Next, the following three types of ink layer coating solutions were prepared. Butyral resin 12 parts by weight (Denka Butyral # 2000-L, manufactured by Denki Kagaku Kogyo Co., Ltd.) Pigment A B C Cyan pigment (CI.P.B.15: 4) 12 parts by weight Magenta pigment (C.I.P.R. 57: 1) -12 parts by weight-Yellow-pigment (C.I.P.Y.14)-12 parts by weight Dispersion aid Solspers S-20,000 0.8 Parts by weight (manufactured by ICI Japan Co., Ltd.)-Solvent n-propyl alcohol 110 parts by weight

To 10 parts by weight of each of the above A, B and C pigment dispersions, 0.24 parts by weight of stearic acid amide and 60 parts by weight of n-propyl alcohol were added to prepare a coating solution having a thickness of 5 μm.
m of the polyester film (manufactured by Teijin Ltd.) having a release treatment on its back surface, the dry film thickness A is 0.36 μm, and the film thickness B is 0.38
A thermal transfer sheet was prepared by coating so that C and C were 0.42 μm.

First, the cyan thermal transfer sheet and the image receiving sheet were overlaid, and printing was carried out by a thermal head recording device (prototype experimental machine) by the sub-scanning division method. This principle is 75μmX50
This is a method of performing multi-step modulation only with area gradation by turning on and off a μm head in a direction of 50 μm with a minute feed of 3 μm pitch. The cyan thermal transfer sheet was peeled off, and an image consisting of area gradation alone was formed on the image receiving sheet. Next, a magenta thermal transfer sheet is superposed on the image-receiving sheet on which the cyan image is formed, aligned and printed in the same manner, and the transfer sheet is peeled off to form a magenta image on the image-receiving sheet. In the same manner, a yellow image was formed and a color image consisting of only area gradation was formed on the image receiving sheet. Next, the image receiving sheet on which the color image is formed is overlaid on the art paper 1
After passing through a heat roller of 4 m / sec at 30 ° C. and a pressure of 4.5 Kg / cm, the polyester film of the image receiving sheet was peeled off to transfer the image receiving two layers carrying the ink image, A color image was formed on the paper. In this color image, the closeness between the color image and a chemical proof (trade name: color art, manufactured by Fuji Photo Film Co., Ltd.) prepared from a lith original was very good. The reflection densities of the individual colors at this time were as follows. When the density of 4P characters was measured with a microdensitometer, the density was the same as the solid area.

The gradation reproducibility was 5% to 95%, which was very good. Furthermore, there is no stickiness on the surface of the image receiving sheet, there are no defects due to dust, the dot shape is good, the surface is matted following the irregularities of the paper, and the surface gloss is an image very similar to the printed matter. It was

Example 2 (Preparation of image-receiving sheet) A coating solution for the image-receiving layer and the image-receiving layer having the following composition was prepared. (Coating liquid for image receiving layer) -Binder PVC / vinyl acetate copolymer 25 parts by weight (MPR-TSL, manufactured by Nisshin Chemical Co., Ltd.)-Plasticizer W-1600 (manufactured by Dainippon Ink and Chemicals, Inc.) 12 parts by weight (adipic acid-based polyester plasticizer, molecular weight 1600) ・ Surfactant (trade name: Megafac F-177P, 4 parts by weight manufactured by Dainippon Ink and Chemicals, Inc.) ・ Solvent Methyl ethyl ketone 75 parts by weight

(Coating Liquid for Image Receiving Second Layer) Binder 16 parts by weight of polyvinyl butyral (Denka Butyral # 2000-L, manufactured by Denki Kagaku Kogyo Co., Ltd.) 4 parts by weight of polymer compound (a) -Surfactant (Brand name Megafac F-177P, 0.5 part by weight manufactured by Dainippon Ink and Chemicals, Inc.)-Solvent n-propyl alcohol 200 parts by weight

An image receiving sheet was prepared in the same manner as in Example 1 using the above coating solution. Using the obtained image-receiving sheet and the thermal transfer sheet prepared in the same manner as in Example 1, a color image was formed in the same manner as in Example 1 and the image was evaluated. Table 1 shows the evaluation results.

Example 3 Instead of the image-receiving layer DPCA-120 of Example 1, an aromatic urethane oligomer (EB-6600, molecular weight 15) was used.
An image receiving sheet was prepared in the same manner as in Example 1 except that 98, manufactured by Daicel Ubibe Ltd. was used. Using this image-receiving sheet, a color image was formed in the same manner as in Example 1 and the image was evaluated. Table 1 shows the evaluation results.

Example 4 Instead of the image-receiving layer DPCA-120 of Example 1, a urethane oligomer (U-2001BA-23, molecular weight 42) was used.
No. 60, manufactured by Shin-Nakamura Chemical Co., Ltd. was used to prepare an image-receiving sheet in the same manner as in Example 1. Using this image-receiving sheet, a color image was formed in the same manner as in Example 1 and the image was evaluated. Table 1 shows the evaluation results.

Example 5 The plasticizer DPCA added to the image-receiving layer in Example 1
An image-receiving sheet was prepared in the same manner as in Example 1 except that -120 parts was changed to 9 parts by weight and 3 parts by weight of acrylic rubber (RS-08, manufactured by Nisshin Chemical Industry Co., Ltd.) was added as an auxiliary binder. . Using this image-receiving sheet, a color image was formed in the same manner as in Example 1 and the image was evaluated. Table 2 shows the evaluation results.

Example 6 The plasticizer DPCA added to the image-receiving layer in Example 1
Example 1 except that −120 was changed to 9 parts by weight and 3 parts by weight of linear polyurethane (Desmocol 406, manufactured by Sumitomo Biurethane Co., Ltd.) was additionally added as an auxiliary binder.
An image receiving sheet was prepared in the same manner as in. Using this image-receiving sheet, a color image was formed in the same manner as in Example 1 and the image was evaluated. Table 2 shows the evaluation results.

Example 7 The plasticizer DPCA added to the image-receiving layer in Example 1
-120 is a polyester-based plasticizer (paraplex G-
An image-receiving sheet was prepared in the same manner as in Example 1 except that the amount was changed to 25 parts, molecular weight 8,000, and Rohm and Haas Japan Co., Ltd. 12 parts by weight. Using this image-receiving sheet, a color image was formed in the same manner as in Example 1 and the image was evaluated. Table 2 shows the evaluation results.

Example 8 An ethylene-vinyl acetate-polar monomer copolymer (Elvalloy L-742, molecular weight 250,000 or more, manufactured by Mitsui-Deupon Polychemical Co., Ltd.) was used in place of the image-receiving layer DPCA-120 of Example 1. An image receiving sheet was prepared in the same manner as in Example 1 except for the above. Using this image-receiving sheet, a color image was formed in the same manner as in Example 1 and the image was evaluated. The evaluation results are shown in Table 3.

Example 9 An ethylene-acrylic ester-polar monomer copolymer (Elvalloy HP-553, molecular weight 250,000 or more, manufactured by Mitsui-Deupon Polychemical Co., Ltd.) was used instead of the DPCA-120 of the image receiving layer of Example 1. An image receiving sheet was prepared in the same manner as in Example 1 except that it was used. This image reception
A color image was formed in the same manner as in Example 1 using the toner and the image was evaluated. The evaluation results are shown in Table 3.

Example 10 One image-receiving layer of vinyl chloride-vinyl acetate copolymer of Example 1 and DPCA-
Instead of 120, ethylene-acrylic ester-polar monomer copolymer (Elvalloy HP-553, molecular weight 2
Over 50,000, Mitsui-Deu Pont Polychemical Co., Ltd.
An image-receiving sheet was prepared in the same manner as in Example 1 except that the image forming sheet was used. Using this image-receiving sheet, a color image was formed in the same manner as in Example 1 and the image was evaluated. The evaluation results are shown in Table 3.

Example 11 One image-receiving layer of vinyl chloride-vinyl acetate copolymer of Example 1 and DPCA-
Instead of 120, ethylene-acrylic ester-polar monomer copolymer (Elvalloy L742, molecular weight 250
000 or more, manufactured by Mitsui-DeuPont Polychemical Co., Ltd., and further added with 2 parts by weight of a polyester plasticizer W-20 (manufactured by Dainippon Ink and Chemicals, Inc.) in the same manner as in Example 1. An image receiving sheet was prepared. Using this image-receiving sheet, a color image was formed in the same manner as in Example 1 and the image was evaluated. The evaluation results are shown in Table 3.

Comparative Example 1 Instead of the image-receiving layer DPCA-120 of Example 1, TP was used.
An image-receiving sheet was prepared in the same manner as in Example 1 except that P (orthophosphate ester plasticizer, manufactured by Daihachi Chemical Co., Ltd., molecular weight 326) was used. A color image was formed using this image-receiving sheet in the same manner as in Example 1, but the surface was extremely sticky, there were many dust defects, the dot shape was poor, and the reproduction gradation was poor.

Comparative Example 2 In place of the image-receiving layer DPCA-120 of Example 1, tetramethylolmethane tetraacrylate (a tetrafunctional acrylic monomer, trade name A-TMMT, Shin-Nakamura Chemical Co., Ltd.) was used.
An image-receiving sheet was prepared in the same manner as in Example 1 except that a polymer having a molecular weight of 352) was used. A color image was formed using this image-receiving sheet in the same manner as in Example 1, but the surface was extremely sticky, there were many dust defects, and the dot shape was poor and the handleability was very poor.

Comparative Example 3 An image receiving sheet was prepared in the same manner as in Example 1 except that the DPCA-120 of the first layer of the image receiving layer of Example 1 was omitted. When a color image was formed using this image-receiving sheet in the same manner as in Example 1, there was no stickiness on the surface, but there were many dust defects and the dot shape was poor and the gradation was poor.

Comparative Example 4 Instead of the image-receiving layer DPCA-120 of Example 1, a urethane oligomer (U-340AX, molecular weight 12000,
An image receiving sheet was prepared in the same manner as in Example 1 except that Shin-Nakamura Chemical Co., Ltd. was used. Using this image-receiving sheet, a color image was formed in the same manner as in Example 1 and the image was evaluated. Table 1 shows the evaluation results.

Table 1: Evaluation results ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Plasticizer Molecular weight Young's modulus Dot Gradation Surface Stud Dust dyne / cm ² Quality Poor quality defect ────────────────────────────────────── Example 1 DPCA-120 1947 80 ◎ ◎ ◎ ◎ O 2 6 functional acrylate monomer-2 W-1600 1600 40 O ◎ O ○ 6 Acrylic acid polyester type 3 EV-6600 1598 2 to 3,000 O O O O 15 Urethane type Origoma-4 U-2001BA-23 4260 5 to 6000 △ △ ◎ ○ 30 ────────────────────────────── Comparative Example 1 TPP 326 80 △ × × × 100 Orthophosphoric acid ester plasticizer 2 A-TMMT 352 100 △ × × × 200 4-functional acrylate type mono -3 No additive-20,000 to 30,000 × × × × ◎ O Thousands 4 U-340AX 15,000 × × ◎ ○ Thousands ━━━━━━━━━━━━━━━━━━━ ━━━━━━━━━━━━━━━━━

Table 2: Evaluation results ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Plasticizer Molecular weight Young's modulus Dot Gradation Surface Staple Dust Auxiliary binder dyne / cm ² Quality Quality Deadline Kind Defect ──────────────────────────────────── Example 5 DPCA-120 1947 50 ◎ ◎ ◎ ◎ O 4 Acrylic rubber -6 DDCA-120 1947 200 O ◎ ◎ ○ 10 Linear Polyurethane -7 Paraflex G-25 8000 100 ○ ○ ◎ ○ 6 ━━━━━ ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

Table 3: Evaluation results ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Plasticizer Molecular weight Young's modulus Dot Gradation Surface Staple Dust Auxiliary binder dyne / cm ² Quality Quality Deadline Kind Defect ──────────────────────────────────── Example 8 Elballoy L742 250,000 or more 5000 ○ ○ ◎ O 129 Elballoy HP-553 250,000 or more 4000 O ○ ◎ ○ 10 10 Elballoy L742 250,000 or more 40 ◎ ◎ ◎ O 2 (used as a binder) 11 Elballoy L742 10 ◎ ◎ ◎ ◎ O 2 Recycler W-20 1000 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

[0078]

The image-receiving sheet material and transfer image forming method of the present invention are excellent in recording sensitivity, dot quality, and gradation without causing stickiness or sticking on the surface of the image-receiving sheet, and particularly, It is possible to obtain an image excellent in printed matter approximation.

Claims (3)

[Claims] 1. An image receiving sheet material used for forming a transferred image, wherein an ink layer is thermally transferred from a transfer material having a heat transferable ink layer to an image receiving sheet material and then retransferred to a permanent support, wherein the image receiving sheet material is Having at least two image-receiving layers on a support, at least one of the image-receiving layers is transferred to a permanent support, and the layer remaining on the support of the image-receiving sheet contains a plasticizer having a molecular weight of 1000 or more, Young's modulus at room temperature is 10kgf · cm ⁻² to 10000kgf
An image-receiving sheet material characterized by being in the range of cm ^-2 . 2. The copolymer according to claim 1, wherein the plasticizer contains at least an ethylene group and a vinyl ester monomer group of carboxylic acid, and an ethylene group and an acrylate group, a polyfunctional acrylate monomer, and a urethane oligomer. And at least one selected from the group consisting of polyester plasticizers. 3. An amorphous organic high-molecular polymer having a softening point of 40 to 150 ° C., which is 30 to 70 parts by weight of a pigment, provided on a support, and has a film thickness of 0. 2 μm-1.
A thermal transferable ink layer having a thickness of 0 μm is adhered to the image receiving sheet material according to claim 1, an ink image is formed on the image receiving sheet material by thermal transfer, and then the ink image and at least one image receiving layer are permanently supported. A transfer image forming method characterized by transferring onto a body.