JPS62189192A - Thermal transfer material - Google Patents

Abstract

PURPOSE:To ensure sufficient adhesion of an ink layer to a recording medium and enable a misrecorded image to be corrected by lift-off, by providing first, second and third ink layers comprising respective specified heat-fusible materials on a base. CONSTITUTION:A thermal transfer material 1 comprises a first ink layer 3, a second ink layer 4 and a third ink layer 5 comprising respective heat-fusible materials and provided sequentially on a base 2 in that order. The heat-fusible material in the first ink layer 3 forms a group of fine particles of a single kind of heat-fusible resin or forms at least two kinds of domains. Of the second and first ink layers 4, 3, at least the second ink layer comprises a coloring material. The third ink layer 5 is provided as a uniform system comprising a heat-fusible material, which does not comprise a coloring material. Since the second ink layer provided as a colored layer is brought into contact with a recording medium through the third ink layer 5 provided as a non-colored layer, it does not penetrate into the recording medium, and lift-off correction of a misrecorded image can be performed by using an adhesive tape or the like.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a thermal transfer material that can provide a transferred recorded image with good print quality even on a recording medium with poor surface smoothness during thermal transfer recording. Regarding.

[Conventional technology]

In addition to the general features of thermal transfer recording methods, such as the equipment used being lightweight, compact, noiseless, and easy to operate and maintain, the thermal transfer recording method does not require color-forming processed paper; It has the feature of excellent image durability, and has been widely used recently.

This heat-sensitive transfer recording method uses a heat-sensitive transfer material in which a heat-transferable ink layer consisting of a colorant dispersed in a heat-melting binder is coated on a support, which is generally in the form of a sheet. is superimposed on the recording medium so that its thermally transferable ink layer is in contact with the recording medium, and heat is supplied from the support side by a thermal head to transfer the melted ink layer onto the recording medium, thereby creating a heat-supplied shape on the recording medium. (pattern) to form a transferred recorded image according to the pattern.

However, in conventional thermal transfer recording, as mentioned above, the ink layer containing a coloring material and melted by heat application forms a transferred recorded image by soaking and adhering to the recording medium. Modification was inherently difficult. Particularly for recording media with large surface irregularities and low smoothness on the paper tube surface, stripes attached to or near the convex portions of the surface of the transferred recorded image are likely to peel off, but ink that has penetrated deep into the four parts is difficult to peel off. It tends to remain easily when
Contamination will occur.

In contrast, a heat-sensitive transfer material has been proposed in which the ink layer of recording medium I1 is made of a heat-melting material that does not penetrate into the recording medium when heat is applied (Japanese Patent Laid-Open No. 57-22090).
In this case, the transfer of the recorded image to the recording medium becomes insufficient, resulting in a recorded image with poor scratch resistance, which is not preferable.

Another point to be improved in thermal transfer materials is the f? , II N can be easily recorded and a recorded latent image with high cohesive force can be formed. However, there are limits to the selection of materials for making such improvements, and peeling from the support and aggregation of ink cannot be easily controlled in some cases, leading to a decline in the quality of transferred recorded images. .

[Problems to be solved by the invention]

The present invention has been made in order to provide thermal transfer (thermal transfer) in which it is sufficient for the right one transfer of the transferred recorded image to the recording medium, and in addition, it is possible to correct erroneous recording by peeling off, and staining due to peeling is less likely to occur.

Further, the present invention has been made in order to provide a thermal transfer material that allows correction of erroneous recordings by peeling off even on recording media with particularly poor surface smoothness, and is less likely to cause stains due to peeling.

Furthermore, the present invention has been made to provide a heat-sensitive transfer material that facilitates the separation of an ink layer from a support during transfer and forms a recorded latent image with high cohesive force.

[Means for solving problems]

That is, the heat-sensitive transfer material provided by the present invention has a first ink layer, a second ink layer, and a third ink layer each containing a heat-melting material on a support in order from the support side. and the thermofusible material of the first ink layer constitutes a group of one type of thermofusible resin fine particles or forms two or more types of domains, and among the second and first ink layers, A coloring material is contained in at least the second ink layer;
The third ink layer is a homogeneous layer made of a heat-fusible material and does not contain a colorant.

[Detailed description and examples of the invention]

In the thermal transfer material of the present invention, since the second ink layer, which is a colored layer, contacts the recording medium through the third ink layer, which is a non-colored layer, the recorded image is formed when the third ink layer is on the recording medium. It is obtained by partially penetrating and adhering to. that time,
The colored layer exists in a part of the third ink layer that permeates and covers the recording medium.

Therefore, since the second ink layer, which is a colored layer, does not penetrate into the recording medium, it is possible to correct erroneous recording by peeling it off using an adhesive tape or the like.

That is, the thermal transfer material according to the present invention can form a transferred recorded image that can ensure sufficient adhesion to the recording medium and can also correct erroneous recording by peeling it off.

On the other hand, in the first ink layer, the thermofusible material constitutes one type of thermofusible resin fine particle group, or forms two or more types of domains, and the cohesive force of the thermofusible material varies. Regardless of this, it is possible to control the adhesive force to the support into a gentle stick shape. Furthermore, by controlling the adhesive force between fine particles or domains, it is possible to form an ink layer with extremely weak cohesive force. Furthermore, in the heat application section, similar to the third ink layer, fusion and homogenization progress, making it easy to differentiate the cohesive force before and after heating, making it easy to peel from the support, and having a high cohesive force. A recording latent image can be formed.

The present invention will be explained in more detail below. In the following description, "%" and "part" expressing quantitative ratios are based on weight unless otherwise specified.

The same elements are represented by the same reference numerals. The thermal transfer material 1 shown in FIGS.
It has a first ink layer 3, a second ink layer 4, and a third ink layer 5, each containing a heat-fusible material.

The first ink layer 3 is a layer in which the thermofusible material constitutes a group of one type of thermofusible resin fine particles, or a layer in which the thermofusible material constitutes a group of one type of thermofusible resin fine particles, or a layer in which the thermofusible material constitutes a group of two kinds of thermofusible resin particles.
It is composed of layers that form the domain of the human body. Although the first ink layer 3 may contain a coloring material, it is also possible to contain a coloring material only in the second ink layer 4.

The second ink layer 4 is, for example, a layer in which a homogeneous system is made of a thermofusible material, a layer in which the thermofusible material constitutes a group of one type of thermofusible resin fine particles, a layer in which the thermofusible material constitutes a group of one type of thermofusible resin fine particles, a thermofusible material The domain is composed of two or more types of domains. Note that the domain here refers to a region in a heterogeneous system that can be distinguished from others by composition, physical properties, etc. The two or more types of domains are composed of, for example, an appropriate combination of hot-melt resin fine particles and a non-particulate phase. That is, for example, when at least one type of domain among two or more types of domains is constituted by thermofusible resin fine particles and at least one other type of domain is constituted by a non-particulate phase, two or more types of domains are When each domain is composed of different non-particulate phases, 2
There is a case where each of different types of domains is composed of different types of heat-melting resin fine particles.

In the thermal transfer material 1 illustrated in FIGS. 1 to 5, in the first ink layer 3, the thermofusible material constitutes a group of thermofusible resin fine particles 6 of one type.

In the thermal transfer material 1 shown in FIG. 1, the second ink layer 4 is composed of a homogeneous heat-melting material, for example, a non-particulate heat-melting material.

In this case, the second ink layer is suitable as a colored layer for obtaining a highly uniform recorded image. Further, it is easy to suppress melting and mixing with the third ink layer in the heat application section, and suppress mixing and penetration of the colorant in the second ink layer due to penetration of the third ink layer into the recording medium. becomes easier.

In the second ink layer 4 of the thermal transfer material 1 shown in FIG. 2, the thermofusible material constitutes a group of thermofusible resin fine particles 6 of one type.

In this case, the hot-melt resin fine particles are fused to each other by heat application, and it is possible to improve the separation between the formed recording latent image portion and the non-heat-applied portion.

In the thermal transfer material 1 shown in FIG. 3, the second ink layer 4 is made of two types of heat-melting resins, for example, type A (hollow circle in the figure) and type B (solid black circle in the figure). The redomain is formed by fine particles of type A and type B heat-melting resin fine particles, which are composed of fine particles and are aggregated in a single or higher order, respectively.

In the thermal transfer material 1 shown in FIG. 4, the second ink layer 4 is composed of heat-melting resin fine particles C and non-particulate particles,
One or more types of domains are formed in each domain. The heat-melting resin fine particles C may form a single domain, or a domain may be formed by a high-order aggregate. Furthermore, two or more types of domains may be formed using different thermofusible resin fine particles C. Similarly, the non-particulate phase may form two or more types of domains in a phase-separated state, for example.

In the thermal transfer material 1 shown in FIG. 5, the second ink layer 4 contains two types of non-particulate ink, for example, type E (solid black area in the figure) and type F (white area in the figure). Each phase forms a domain.

In this case, it becomes possible to use materials with high cohesive strength that cannot be used in homogeneous systems.

Furthermore, since it is a non-uniform system, the difference in cohesive force becomes clear when heat is applied, and a clear recorded image with good print quality can be obtained.

The third ink layer 5 includes a homogeneous thermofusible material,
For example, it is composed of a non-particulate heat-melting material as a component,
The third ink layer 5 does not contain any coloring material.

The term "thermal meltability" as used in the present invention means the property of melting into a liquid state when heat is applied, or the property of softening under heat and exhibiting adhesive strength or adhesive strength.

The first to third ink layers 3 to 5 each contain a plasticizer,
Various additives such as oil agents may be contained.

As the support 2, conventionally known films and papers can be used as they are, such as films of relatively heat-resistant plastics such as polyester, polycarbonate-1, triacetylcellulose, polyphenylene sulfide, polyimide, and cellophane. Alternatively, parchment paper, condenser paper, etc. can be suitably used. The thickness of the support is
When considering a thermal head as a heat source during thermal transfer, the thickness is preferably about 1 to 15 microns. In addition, when using a thermal head, the surface of the support that comes into contact with the heat/nod is made of a heat-resistant material such as silicone resin, fluororesin, polyimide resin, epoxy resin, phenol resin, melamine resin, acrylic resin, or nitrocellulose resin. By providing a protective layer, the heat resistance of the support can be improved, or a support material that could not be used heretofore can be used.

Examples of the thermofusible material constituting one type of thermofusible resin fine particle group in the first ink layer include wax, polyolefin resin such as low-molecular polyethylene, polyamide resin, polyester resin, and epoxy resin. ,
Preferred examples include elastomers such as polyurethane resins, acrylic resins, polyvinyl chloride resins, polyvinyl acetate resins, petroleum resins, phenolic resins, polystyrene resins, styrene-butadiene rubber, and isoprene rubber. be able to.

The thermofusible resin particles can be produced by polymerization processes such as emulsion polymerization and suspension polymerization, by mechanically dispersing the thermofusible resin using a dispersant, and by other methods such as mechanical crushing, spray drying, precipitation, etc. Among those obtained, the softening temperature of the fine particles is 50°C to 160°C, preferably 60°C to 150°C.
℃ is used. Note that the softening temperature here is
Using a high slag flow tester CFT-500 type, load 1
This refers to the outflow start temperature of a sample measured under conditions of 0 kg and a temperature increase rate of 2° C./min.

The average particle diameter of the heat-melting resin fine particles is 20 μm or less (~
approximately 0.01 μm), and even less than 10 μm (~0.1 μm
m) is preferable. If it exceeds 20 μm, it is too large and the particle size may be the same as the ink layer thickness. In this case, voids are likely to occur in the recorded latent image when the particles are fused to adjacent particles by heat application, resulting in poor transferability, which is undesirable. Further, for this reason, it is not preferable that the particle diameter and the ink layer thickness are the same.

Examples of the thermofusible material constituting one type of thermofusible resin fine particle group in the second ink layer 4 include wax, low-molecular polyethylene, polyolefin resin such as oxidized polyolefin, polyamide resin, polyester resin, Epoxy resin, polyurethane resin, acrylic resin, polyvinyl chloride resin, polyvinyl acetate resin,
petroleum resin, phenolic resin, polystyrene resin,
Examples include elastomers such as styrene-butadiene rubber and isoprene rubber.

The thermofusible resin particles can be produced by polymerization processes such as emulsion polymerization and suspension polymerization, by mechanically dispersing the thermofusible resin using a dispersant, and by other methods such as mechanical crushing, spray drying, precipitation, etc. Among those obtained, the softening temperature of the fine particles is 50°C to 160°C, preferably 60°C to 150°C.
℃ is used. Note that the softening temperature here is
Using a high slag flow tester CFT-500 type, load 1
This refers to the outflow start temperature of a sample measured under conditions of 0 kg and a temperature increase rate of 2° C./min.

The average particle diameter of the heat-melting resin fine particles is 20 μm or less (~
(approximately 0.01 μm), and more preferably 10 or less (approximately 0.1 μm). 20. If it exceeds +tm, it is too large and the particle diameter may become the same as the ink layer thickness. In this case, voids are likely to occur in the recorded latent image when the particles are fused to adjacent particles by heat application, resulting in poor transferability, which is undesirable.

Further, for this reason, it is not preferable that the particle diameter and the ink layer thickness are the same.

The ratio of the different types of thermofusible resin fine particles constituting the second ink layer can be arbitrarily selected depending on the functions or physical properties exhibited by each particle, and is not particularly limited.

In addition, when the heat-fusible materials of the first and second ink layers 3 and 4 constitute two or more types of domains, the same heat-fusible material that can constitute a homogeneous system in the third ink layer described later may be used. You can select one from among them as appropriate. Further, when forming heat-melting resin fine particles, it is particularly desirable to appropriately select those forming the group of the one type of heat-melting resin particles from among the same heat-melting materials.

Examples of heat-melting materials that can form a homogeneous system in the third ink layer 5 include waxes such as castor wax, paraffin wax, Sasol wax, microcrystalline wax, and castor wax, stearic acid, palmitic acid, lauric acid, Higher fatty acids such as aluminum stearate, lead stearate, barium stearate, zinc stearate, zinc valmitate, methyl hydroxystearate, glycerol monohydroxystearate, or derivatives such as their metal salts and esters,
Vinyl resins, polyvinyl chloride resins, including polyamide resins, polyester resins, epoxy resins, polyurethane resins, acrylic resins (e.g. polymethyl methacrylate, polyacrylamide), vinyl acetate resins, polyvinylpyrrolidone, etc. Resins (e.g., vinyl chloride-vinylidene chloride copolymer, vinyl chloride-vinyl acetate copolymer, etc.), cellulose resins (e.g., methylcellulose, ethylcellulose, carboxycellulose, etc.),
Polyvinyl alcohol M +N resin (e.g. polyvinyl alcohol, partially saponified polyvinyl alcohol, etc.), petroleum resin, rosin derivative, coumaron-indene resin, terpene resin, novolak type phenol resin, polystyrene resin, polyolefin resin (e.g. polyethylene, polypropylene, polybutene, ethylene-vinyl acetate copolymer, oxidized polyolefin, etc.), polyvinyl ether resin, polyethylene glycol resin and elastomers, natural rubber, styrene-butadiene rubber, methyl methacrylate-butadiene rubber, acrylonitrile-butadiene rubber, isoprene Examples include rubber.

The softening temperature of the thermofusible material ranges from 40°C to 150°C, preferably from 60°C to 140°C. Further, it is preferable that the melt viscosity is 2 centiboise to 200,000 centiboise (rotational viscometer) at 150°C.

Among the thermofusible materials that can constitute each of these layers, it is preferable that the thermofusible material used for the first ink layer has a weak adhesion to the support, and particularly preferable materials include carna wax, paraffin wax, etc. waxes, stearic acid and its derivatives, polyolefin resins, etc. The heat-melting material used for the second ink layer is preferably one with high film strength, and particularly preferred materials include polyamide resin, acrylic resin, vinyl acetate resin, polyolefin resin,
Examples include polyurethane resins and butadiene resins such as styrene butadiene rubber.

The thermofusible material used for the third ink layer is preferably one that exhibits adhesive strength when heated, and particularly preferred materials include polyamide resins and vinyl acetate resins.

When the heat-melting material of the first ink layer 3 constitutes one type of heat-melting resin fine particle group, for example, after uniformly distributing the material on the support, the material is heated under temperature conditions below the softening temperature of the fine particles. The layer can be formed by heating and fixing it to the support, but the layer can be formed by coating the fine particle dispersion and then drying it at a temperature lower than the softening temperature of the fine particles to remove the dispersion medium. Particularly preferred is the method of

When the second ink layer 4 constitutes a group of 4 types of hot-melt resin fine particles (Fig. 2), the second ink layer 4 has, for example, a uniform distribution of the hot-melt resin fine particles on the support. After applying the fine particle dispersion, the fine particles can be heated to a temperature below the softening temperature of the fine particles and fixed on the support to form a layer. Particularly preferred is a method in which the layer is formed by drying to remove the dispersion medium.

In the thermal transfer material 1 shown in FIG. 3, the second ink layer 4 is formed by appropriately selecting two or more kinds of fine particles from among the heat-melting resin fine particles made of the above-mentioned hot-melting material, and appropriately displacing the fine particles together. After mixing and uniformly distributing it on the support,
The layer can be formed by heating to a temperature below the softening temperature of the fine particles and fixing them on the support, but after appropriately mixing and coating a fine particle dispersion, for example, a resin emulsion, the softening temperature of the fine particles Particularly preferred is a method in which the layer is formed by drying at a temperature lower than the lowest softening temperature among them to remove the dispersion medium. In this case, a colorant, an inertia 11 agent, etc., which are added as necessary, can be included in the LJ dispersion or inside the fine particles.

In the thermal transfer material 1 shown in FIG. 4, the second ink layer 4 is made of, for example, fine heat-melting resin particles or a dispersion thereof, or a heat-melting material or a solution or dispersion thereof, and optionally, It is provided by applying a coating liquid containing coloring +A, additives, etc. according to a conventional method, and subjecting it to heat treatment if necessary. In addition, since the heat-transferable ink layer has heat-melting resin fine particles remaining in the ink layer in the form of particles, the coating liquid is usually heat-treated at a temperature below the softening temperature of the heat-melting resin fine particles when forming the ink layer. Ru.

Among these, in particular, two or more types of fine particles are selected from among the hot-melt resin fine particles, and a dispersion of these particles, for example, a resin emulsion, is appropriately mixed and coated. Particularly preferred is a method in which the layer is formed by drying at a temperature between the maximum softening temperature to remove the dispersion medium. In this case, colorants, additives, etc. added as necessary can be included in the dispersion or inside the ifX particles. By this method, fine particles whose drying temperature is higher than the softening temperature form a non-particulate phase, and fine particles whose drying temperature is lower than the softening temperature remain particulate.

In the thermal transfer material 1 shown in FIG. 5, the second ink layer 4 is formed by dispersing, for example, a pulverized product of a heat-fusible material that is not soluble in the solvent in the solution in a heat-fusible material solution. , by coating on a support, heating and drying, and melting, materials that are not compatible with each other in the range of heat-melting materials such as ethylene-vinyl acetate copolymer resin and vinyl acetate resin, cellulose resin and acrylic resin, etc. S, 1 can be obtained by applying the mixture onto a support in the form of a hot melt mixture, solution, etc., and subjecting it to heat treatment if necessary to cause phase separation.

In addition, as a method different from these methods, after appropriately mixing and coating a dispersion of two types of thermofusible resin fine particles, such as a resin emulsion, Particularly preferred is a method in which layers are formed each time the dispersion medium is removed by drying at a temperature higher than the softening temperature. In this case, coloring materials, additives, etc. added as necessary can be included in the dispersion or inside the fine particles.

In order to configure the second ink layer 4 and the third ink layer 5 in a uniform system, the second and third ink layers each have a heat-melting material, a coloring material (second ink layer), and a colorant (second ink layer). Other additives to be added may be melt-mixed or kneaded with a suitable solvent to obtain a hot-melt, solution or dispersion ink. These inks are sequentially applied onto the first ink layer provided on the support -]-,
It is obtained by heating and drying as necessary to sequentially form the second and third ink layers.

Colorants include carbon blank, nigrosine dye,
Lamp Black, Sudan Black SM, First Yellow 01 Benzidine Yellow, Pigment Yellow, India First Orange, Irgazine Red, Valanitroaniline Red, Toluidine Red, Carmine F
B, Permanent Bordeaux FRR, Pigment Orange R1 Linole Red 2G, Lake Red 020
- Damin FB, Rhodamine B Lake, Methyl Violet B Lake, Phthalocyanine Blue, Pigment Blue, Prilliant Green B, Phthalocyanine Green, Oil Yellow CG, Zapon Fast Yellow C
GG, Kayaseso 1-Y963, Kayaset YG, Sumiplast Yellow G, Zapon Fast Orange RR,
Oil Scarlent, Sumiblast Orange G1 Orazole Brown G1 Zapon Fast Scarlet C
One or more types of known dyes and pigments such as G1 Eisensbiron Red BEH, Oil Pink OP, Victoria Blue F4R, First Gen Blue-5007, Sudan Blue, and Oil Peacock Blue can be used.

These colorants are heat-fusible materials 1 in the ink layer used.
It is preferable to use it in a ratio of 3 to 500 parts per 100 parts.

These coloring materials may be used in at least the second ink layer of the first ink layer and the second ink layer, but the second ink layer in contact with the recording medium does not contain the coloring material, and therefore,
Easier to correct.

The layer thickness of the first ink layer is 0.5-10 pm, preferably 1-5 pm, and the layer thickness of the second ink layer is 0.5-10 pm.
The thickness of the third ink layer is preferably 0.5 to 10 μm, preferably 1 to 5 μm.

Further, the total thickness of the first to third ink layers is preferably 2 to 20 μm.

The planar shape of the thermal transfer material of the present invention is not particularly limited, but it is generally used in the form of a typewriter ribbon or a medium-wide tape used for line printers. Further, for color recording, a heat-sensitive transfer material may be used in which heat-melting ink of several different tones is applied in stripes or blocks.

The thermal transfer recording method using the above thermal transfer material is not particularly different from a normal thermal transfer recording method, and a heat source such as a thermal head or a laser beam can be used as a heat source for thermal transfer recording.

To carry out the peeling correction, for example, a thermal adhesive tape 61 as shown in FIG. 6 can be used. That is, as shown in FIGS. 7(A) to (D), a thermal adhesive tape 61 having a thermal adhesive layer 63 that generates adhesive force when heated is provided on a support 62'', and the thermal adhesive layer is placed on the erroneously recorded image 71. The recording media 73 are stacked so that they are facing each other, and heated from the support body 62 side by, for example, a thermal head 72 used for recording, and the resulting adhesive force causes the recording medium 73 to
It is possible to separate the erroneously recorded image 7I from above. At this time, a part of the third ink layer that has penetrated into the recording medium remains as it is, but since it is a non-colored layer, it is not suitable for practical use.
There are no inconveniences.

Hereinafter, the present invention will be explained in more detail with reference to Examples.

Example-1 0.3 g/rd of additional silicone resin for release paper was coated on the back side and heat-dried at 70°C to form a heat-resistant protective layer 4.
5 μm polyethylene terephthalate film support (
A wax emulsion (softening temperature: 75° C., particle size: 1.+1 m) was coated using PET (hereinafter referred to as PET), and dried at 60° C. to form a first ink layer consisting of fine wax particles having a thickness of 2 tt m.

<Ink 1> Ink 1 was prepared by mixing each component of the above formulation.

Ink 1 was applied onto the previously provided first ink layer using an applicator and dried at 105° C. to form a second ink layer having a layer thickness of 2 μm.

<Ink 2> Ink 2 was prepared by stirring and dissolving each component of the above formulation using a homomixer. Ink 2 was applied onto the previously provided second ink layer using an applicator, dried at 80° C., and a third ink layer having a layer thickness of 2 μm was formed to obtain a thermal transfer material N).

Example-2 <Ink 3> Ink 3 was prepared by mixing each component of the above formulation.

A thermal transfer material (TI) was obtained in the same manner as in Example 1 except that a second ink layer was provided.

For the second ink layer, the above Ink 3 was applied onto the first ink layer using an applicator and dried at 105°C to form a second ink layer having a layer thickness of 2 pm.

Comparative Example Ink 4> Ink 4 was prepared by dispersing the carbon blank by heating each component of the second formulation at 130° C. and mixing with a sand mill for 30 minutes.

A thermal transfer material (1) was obtained by true-melt coating Ink 4 on a back-treated 35 μm PETJ sheet to form an ink layer with a thickness of 41 tm.

Thermal transfer recording was performed on the thermal transfer materials (T) to (Ill) thus obtained under the following conditions.

Superimpose (thermal adhesive tape on 6 II P E T,
A thermal adhesive layer with a thickness of 4 μm was applied from the PET surface side using a thermal head in the form of a printed pattern, and the printing was peeled off.

Printing, transferability and peelability were evaluated and the results are shown in Table 1.

Table 1 ○: Excellent in practical use ×: Not suitable for practical use When the thermal transfer material of the present invention is used, as shown in the table above, even on paper with low smoothness, the print is sharp, the transferability is good, and the print density is low. High-quality printing can be obtained, and furthermore, correction by peeling is also possible.

〔Effect of the invention〕

According to the present invention, it is possible to provide a thermal transfer material in which the adhesion of a transferred recorded image to a recording medium is sufficient, erroneous recording can be corrected by peeling off, and staining due to peeling is less likely to occur. In addition, the present invention can sweep a thermal transfer material that allows correction of erroneous recording by peeling off even on a recording medium with particularly poor surface smoothness, and is less prone to staining due to peeling.

Furthermore, the ink layer can be easily separated from the support during transfer, and a recorded latent image with high cohesive force can be formed.

[Brief explanation of drawings]

1 to 5 are schematic cross-sectional views in the thickness direction of the thermal transfer material of the present invention, FIG. 6 is a schematic cross-sectional view in the thickness direction of a thermal adhesive tape used for correction, and FIGS. 7(A) to (D ) is an operation explanatory diagram showing how the ink layer is peeled off during peeling correction. DESCRIPTION OF SYMBOLS 1...Thermal transfer material, 2...Support, 3...1st ink layer, 4...2nd ink layer, 5...3rd ink layer. Agent Patent Attorney Jo Yamashita Taira No. 1, No. 2, No. 3

Claims (1)

[Claims] A first ink layer, a second ink layer, and a third ink layer each containing a heat-fusible material are provided on the support in order from the support side, and the heat-fusibility of the first ink layer is 1 material
It constitutes a group of heat-melting resin fine particles of two types
At least one of the second and first ink layers contains a colorant, and the third ink layer is made of a heat-fusible material to form a homogeneous system. Furthermore, this thermal transfer material is characterized by a layer that does not contain a colorant.