JPH01135692A - Image receiving sheet for thermal transfer recording - Google Patents

Abstract

PURPOSE:To obtain a sharp and high-density recording image and to remarkably improve a shelf stability, by incorporating a thermoplastic synthetic resin and fine particles of a crystalline aromatic compound in an image receiving layer of an image receiving sheet. CONSTITUTION:As a crystalline aromatic compound incorporated in an image receiving layer together with a thermoplastic resin, a compound having a melting point above ordinary temperature is selectively used. However, a compound having a melting point above 150 deg.C deteriorates a recording sensitivity enhancing effect; thus, a compound having a melting point of 60-130 deg.C is preferably used. On the other hand, the compound for use is preferably atomized to be 3mum or less in average particle diameter because a 5mum or more average particle diameter causes an unsufficient recording sensitivity improving effect and deteriorates a recording image quality. However, the value is preferably kept at least 0.1mum for the prevention of the deterioration of an image shelf stability. Furthermore, the content of the compound is less than the equivalent weight of the thermoplastic synthetic resin forming the image receiving layer, i.e. preferably 50wt.% or less and most preferably 30wt.% or less. The content of 0.5wt.% or less causes an insufficient recording sensitivity improving effect; thus, that of 1wt.% or more is preferable.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to an image receiving sheet for thermal transfer recording, and in particular to an improvement of an image receiving sheet for thermal transfer recording using a heat sublimable dye, which significantly improves recording sensitivity. The image-receiving sheet is provided.

``Prior art'' The thermal recording method, which can obtain a recorded image at the same time as a human input signal, is relatively simple, inexpensive, and has low noise. It is used in various directions.

The most commonly used recording medium for these thermal recording methods is so-called color-forming type thermal recording paper, which is provided with a recording layer that develops color by causing physical or chemical changes when heated. However, such recording papers tend to develop unnecessary color during the manufacturing process and during storage, and the storage stability of recorded images is also poor, causing discoloration due to contact with organic solvents, chemicals, etc. Resulting in.

Therefore, a recording method using a recording medium that uses colored coloring material itself as a recording medium to replace the coloring type thermal recording paper has been proposed, for example, in Japanese Patent Application Laid-Open No. 51-15446.
In the publication, a coloring material that is solid or semi-solid at room temperature is applied onto a base material such as paper or polymer film, and the coloring material on the base material is brought into contact with recording paper, and a thermal recording head is used to record the base material. A method has been proposed in which a recorded image is obtained by heating the coloring material on the material and selectively transferring the coloring material to the recording paper.

In this recording method, the coloring material on the base material is melted, evaporated, and sublimated by heat, and then transferred to the recording paper, and a recorded image is obtained by adhesion, adsorption, and dyeing.The feature is that plain paper can be used as the recording paper. It is said that there is.

``Problems to be Solved by the Invention'' However, when plain paper is used as recording paper, dyeing is particularly difficult to occur, and the color density of the recorded image is low (and the color fading occurs significantly over time). Resulting in.

In view of the current situation, the present inventors have conducted extensive research into improving image-receiving sheets for thermal transfer recording that are useful for use in recording systems that thermally transfer colored coloring materials, particularly heat-sublimable dyes.
An image-receiving sheet has been completed which provides extremely clear recorded images with high color density and which also has significantly improved storage stability.

"Means for Solving the Problems" The present invention provides an image-receiving sheet for thermal transfer recording that receives a transferred image from a color material transfer sheet, in which the image-receiving layer of the image-receiving sheet contains a thermoplastic synthetic resin and crystalline aromatic compound fine particles. This is an image-receiving sheet for thermal transfer recording, which is characterized by:

"Function" In the image-receiving sheet of the present invention, the thermoplastic resin contained in the image-receiving layer includes, for example, a polymeric resin based on vinyl monomers such as methylene, vinyltoluene, acrylic ester, methacrylic ester, acrylonitrile, vinyl chloride, and vinyl acetate. Coalescing and copolymers; condensation polymers such as polyester, polyamide, polycarbonate, polysulfone, epoxy resin, polyurethane; and cellulose resins, etc., but those with excellent dyeability with heat sublimable dyes are particularly preferred. used.

The crystalline aromatic compound contained in the image-receiving layer together with the thermoplastic resin must be maintained in a fine particle state in the image-receiving layer, and a compound having a melting point above room temperature is selected for use. However, since a compound having a melting point exceeding 150°C will reduce the effect of improving recording sensitivity, it is preferable to use a compound having a melting point of 60 to 130°C.

Specific examples of such crystalline aromatic compounds include 1,4-dicyclohexylbenzene (m, p).

100°C), 4,4'-dimethylbiphenyl (m, p.

121°C), 4.4'-di-tert-butylbiphenyl (m, p, 128°C), 9m-terphenyl (m,
p.

87°C], 2-methyl-3p-terphenyl (m, p.

91'C), 2,5.2'',5''-tetramethyl-p-
terphenyl (m-p, 1) 2℃], fluoranthene (m, p, 1) 0℃], fluorene (m, p, 1)
2℃].

2.6-diitubrobylnaphthalene (m, p, 69°C
].

1.4-Dimethoxynaphthalene (m, p, 87°C).

1.4-jethoxynaphthalene (m, p, 86°C).

1-propoxynaphthalene [m, p, 106°C], ■
.

4-dibenzyloxynaphthalene (m, p, 98°C)
.

1-ethyl-4-hensyloxynaphthalene Cm, p.

89℃], 2-benzylthionaphthalene (m, p, 8
6℃], dimethyl terephthalate (m, p, 142
℃〕.

diphenyl terephthalate Cm, ρ, 75°C], dihenzyl terephthalate (m, p, 98°C), isophthalic acid dibenzyl ester Cm, ρ, 83°C], 2-hydroxy-4-methoxy-hensiphenone (m, p.

63°C], diphenylsulfone (m, p, 124°C
].

4.4'-Dichloro-diphenylsulfone (m, p.

148°C), 2.6-di-tert-butyl-4-methylphenol (m, p, 69°C), 2.2'-methylenebis(4-methyl-5-Lert-butylphenol) Cm, p, 120°C ], β-naphthylbenzyl ether (m, p, 93°C), 1-benzyloxy-4-benzylthiobenzene (m, p, 92°C), l
-benzyloxy-4-phenethylthiobenzene [m,
p, 79°C), 1-(2-chlorophenoxy)-2-
Phenoxyethane (m, p, 81'C), 1
-(2-chlorophenoxy)-2-(2-methylphenoxy)ethane Cm, p, 87°C), 1-(2-chlorophenoxy)-2-(3-methylphenoxy)ethane (
m, p, 85°C), 1-(2-chlorophenoxy)-
2-(4-methylphenoxy)ethane (m, p.

100°C), 1-(4-chlorophenoxy)-2-(2
-methylphenoxy)ethane (m, p, 81.5'C
), 1-(4-chlorophenoxy)-2-(3-methylphenoxy)ethane Cm, p, 79.5°C].

■ = (4-chlorophenoxy)-2-(4-methylphenoxy)ethane (m, p, 132°C), 1-(4-acetylphenoxy)-2-phenoxyethane [m, p,
139°C), 1-(4-acetylphenoxy)-2-
(2-methylphenoxy)ethane [m, p, 1)9.
5°C), 1-(4-propionylphenoxy)-2-phenoxyethane (m, p, 120°C).

1-(2-methoxyphenoxy)-2-(4-methylphenoxy)ethane (m, p, 89°C), 1-(3-methoxyphenoxy)-2-(4-methylphenoxy)ethane (m, p, 75°C), 1.2-bis-(4-methoxyphenoxy)ethane (m, p, 128°C), 1-
(4-methoxyphenoxy)-2-phenoxyethane (
m, p, 103°C), 1-(4-methoxyphenoxy)-2-(2-methylphenoxy)ethane [m, p,
80°C), 1-(4-methoxyphenoxy)-2-(3
-methylphenoxy)ethane (m, p, 1) 2°C),
1-(4-methoxyphenoxy)-2-(4-methylphenoxy)ethane (m, p, 129°C), 1-(4-
methoxycarbonylphenoxy)-2-phenoxyethane (m, p.

106℃), 1-(4-cyanophenoxy)-2-phenoxyethane (m, p, 1) 0℃), 1-(4-cyanophenoxy)-2-(2-methylphenoxy)ethane (m, 1 .98°C), 1-(4-cyanophenoxy)-2-(3-methylphenoxy)ethane (m, ρ,
96.5°C), 1-(4-cyanophenoxy)-2-(
4-methylphenoxy)ethane [m, p, 1) 1.5
), 1-(4-nitrophenoxy)-2-phenoxyethane (m, p, 87°C), 1-(4-nitrophenoxy)-2-(4-methylphenoxy)ethane (m, p
, 103°C), 1-(4-chlorophenoxy)
2-(4-tert-butylphenoxy)ethane (m,
p, 1) 1°C), 1-(4-methoxyphenoxy)
-2-(4-tert-butylphenoxy)ethane (m
, p, 109.5°C), 1-'(4=acetylphenoxy) -2-(4-tert-butylphenoxy)
Ethane [m, ρ, 101.5°C], ■-(4-methoxyphenoxy)-4-phenoxydibukun Cm, p, 10
0°C), 1-(4-cyanophenoxy)-4-phenoxybutane (m, p, 72°C).

1-phenoxy-2-naphthoxy+1) ethane [m, p
.

106℃], 1-phenoxy-4-naphthoxy(2)butane (m, p, 1) 1.5℃), 1-(2-isopropylphenoxy)-2-naphthoxy(2)ethane (m,
p.

97°C), 1-(4-methylphenoxy)-3-naphthoxy(2)propane (m, p, 92°C), 1-(2-
methylphenoxy)-2-naphthoxy(2)ethane (m
, ρ, 123℃], 1-phenoxy-6-naphthoxy (
2) Hexane (m, p, 86°C), 1-(2-phenylphenoxy)-2-phenoxyethane (m, p.

96°C), 1-(4-phenylphenoxy)-2-(2
-methylphenoxy)ethane (m, p, 1)0'C)
, 1,4-diphenoxybutane (m, p, 99°C).

1.4-bis(4-methylphenoxy)butane [m, p
, 104 °C), 1,2-bis(3,4-dimethylphenoxy)ethane (m, p, 105 °C), 1-(4-phenylphenoxy)-3-phenoxypropane (m, p
, 94.5°C], 1-phenoxy 2-(4-ter
t-Butylphenoxy)ethane (p, 93”c)
, 1,2-diphenoxyethane Cm, p, 96°C].

1-(2-methylphenoxy)-2-phenoxyethane (m, p, 71.5°C), 1-(3-methylphenoxy)-2-phenoxyethane [m, p, 76°C].

1-(4-methylphenoxy)-2-phenoxyethane (m, p, 99.5°C), 1-(2,3-dimethylphenoxy)-2-phenoxyethane [■, p, 106
°C], 1 ~ (2,4-dimethylphenoxy) = 2-phenoxyethane Cm, p, 76.5 °C], 1-(3,
4-dimethylphenoxy)-2-phenoxyethane (n
+, p, 101°C), 1-(3,5-dimethylphenoxy)-2-phenoxyethane (m, p.

77.5°C), 1-(4-ethylphenoxy)-2-phenoxyethane (m, p, 107°C), 1-(4-isopropylphenoxy)-2-phenoxyethane (m,
p, 94°C), 1 (4-tert-butylphenoxy)-2-phenoxyethane [m, p, 9
2℃l, 1.2-bis(2-methylphenoxy)ethane (m, p, 84℃), 1-(4-methylphenoxy)
-2-(2-methylphenoxy)ethane (m, p.

88.5℃), 1-(3,4-dimethylphenoxy)
-2-(2-methylphenoxy)ethane [n+, p,
8].

55°C, 1-(4-ethylphenoxy)-2-(2-methylphenoxy)ethane (m, p, 77°C).

1-4-isopropylphenoxy)-2-(2-methylphenoxy)ethane (m, p, 87°C], ■(4
tert-butylphenoxy)-2-(2-methylphenoxy)ethane (m, p, 96°C), l.

2-bis(3-methylphenoxy)ethane (+a, p.

98°C), 1-(4-methylphenoxy)-2-(3-
methylphenoxy)ethane (m, p, 94°C).

1-(2,3-dimethylphenoxy)-2-(3-methylphenoxy)ethane (m, p, 71°C), 1-
(2,4-dimethylphenoxy)-2-(3-methylphenoxy)ethane (m, p, 76°C], I-(3,4
-dimethylphenoxy)-2-(3-methylphenoxy)ethane (m, p, 78°C), 1-(4-ethylphenoxy)-2-(3-methylphenoxy)ethane (m,
p, 106°C), 1-(4-isopropylphenoxy)-2-(3-methylphenoxy)ethane (m, p,
83.5°C), 1-(4-tert-butylphenoxy)-2-(3-methylphenoxy)ethane (m
, p, 89.5°C), 1-(2,3-dimethylphenoxy)-2-(4-methylphenoxy)ethane (m,
p, 94 °C), 1-(2,4-dimethylphenoxy)-2-(4-methylphenoxy)ethane (m,
p, 77°C), 1-(2,5-dimethylphenoxy)
-1-(4-methylphenoxy)ethane (m, p, 9
3℃], 1-(3,5-dimethylphenoxy)-2"
-(4-methylphenoxy)ethane (m, 1.1) 0°C
), 1-(4-isopropylphenoxy)-2-(4-
methylphenoxy)ethane (m, p, 1) 6°C),
1-(4-tert-butylphenoxy')
-2-(4-methylphenoxy)ethane (m, p, 1
) 8°C), 1,2-bis(2,3-dimethylphenoxy)ethane (m, p, 120°C).

1-(2,5-dimethylphenoxy)-2-(2゜3-
dimethylphenoxy)ethane [m, p, 87.5°C]
.

1.2-bis(2,4-dimethylphenoxy)ethane (
m, p, 1) 1.5°C), 1-(4-C tylphenoxy)-2-(2,4-dimethylphenoxy)ethane (
m, p, 72°C), 1 (4-tert-butylphenoxy)-2-(2,4-dimethylphenoxy)ethane (usual, 2.82°C), 1,2-bis(2°5-
Dimethylphenoxy, ) ethane (m, p, 80°C).

1-(3,4-dimethylphenoxy)-2-(2゜5-
dimethylphenoxy)ethane (+w, p, 86°C].

1-(4-ethylphenoxy)-2-(2,5-dimethylphenoxy)ethane (m, p, 99.5°C).

1-(4-tert-butylphenoxy)-2-(2
゜5-dimethylphenoxy)ethane (m, p, 86℃
].

1.2-bis(3,4-dimethylphenoxy)ethane (
1,2-bis(3,5-dimethylphenoxy)ethane (m, p, 97.5°C).

1.3-bis(4-methylphenoxy)propane (m,
p, 93.5°C), 1-(4-methylphenoxy)-
2-naphthoxy(1)ethane (m, p, 84.5℃3
．． 1-(2,5-dimethylphenoxy)-2-naphthoxy(1)ethane (m, p, 1)2°C), 1.2-
dinaphthoxy(1) ethane (m, p, 129°C), 1
-Phenoxy 2-hydroxy-3-phenoxypropane [m, p, 80°C], -Phenoxy 2-hydroxymethyl-2-phenoxyethane (m, p, 79°C)
].

1.2-bis(phenylthio)ethane Cm, p, 70
°C), 1,4-bis(phenylthio)butane (m, p.

88°C), 1-(p-)lylthio)-2-(p-ethoxyphenoxy)ethane (m, p, 90°C), 1-<
p-methoxybenzenethio)-2-(p=ethoxyphenoxy)ethane [cassette, p, 88°C], ■-(β-naphthylthio)-2-phenoxyethane [m, p, 88°C]
, 1-(p-1lylthio)-2-(β-naphthyloxy)ethane (m, p, 96°C], 1-<p-tolylthio)-2-(p-biphenyloxy)ethane (m, p,
90°C), 1,4-bis(phenylthio)-2-butene (n+, p, 78°C), l-hydroxy-4-benzyloxybenzophenone (m, p, 1) 5°C),
2-(2'-hydroxy-5'-methylphenyl)-hencytriazole (m, p.

129°C), 2-(2'-hydroxy-5'-ter
t-butylphenyl)-benzotriazole (m, p.

96°C), 2-(2'-hydroxy-3'-tert
-7'thyl-5'-methylphenyl)-5-chloro-hencytriazole (m, p, 138°C 3.2-(2'
-Hydroxy-3'5'-di-tert-butylphenyl)-hencytriazole (m, p, 152°C).

2-(2'-hydroxy-3'5'-tert
-butylphenyl)-5-chloro-benzotriazole (m, p, 154°C) and the like.

In addition, many of the compounds used as sensitizers and color developers in the field of heat-sensitive recording materials have favorable melting points, so they can be used effectively if they have excellent affinity with sublimable dyes. It is.

The above-mentioned crystalline aromatic compounds are appropriately selected and used depending on the sublimable dye contained in the color material transfer sheet and the type of thermoplastic synthetic resin constituting the image-receiving layer. More than one type may be used in combination, and in this case, not only the method of mixing individual fine particles, but also the method of using a eutectic or a mixture of aromatic compounds used in combination may be made into fine particles.

Furthermore, when two or more types of crystalline aromatic compounds are used together, an image-receiving layer having a multilayer structure may be formed by overcoating image-receiving layer-forming coating liquids containing fine particles of each aromatic compound. At that time, the crystalline aromatic compounds contained in each layer have good affinity with each other,
It is desirable to select a combination that stabilizes in the form of a eutectic mixture upon hot melting, and in this case it is also possible to use compounds with a melting point of 150° C. or higher.

In the present invention, it is important to control the particle size of the crystalline aromatic compound fine particles, and if the average particle size exceeds 5 μm, the effect of improving recording sensitivity will be insufficient and the recorded image quality will deteriorate, so it is preferable to It is used after being atomized to 3 μm or less.

However, if the particles are atomized to 0.01 μm or less, the melting point within the image-receiving layer will not be clear, bleeding will appear in the recorded image, and the storage stability of the image will deteriorate.
It is preferable to keep it within this range.

The content of the crystalline aromatic compound fine particles in the image-receiving layer is also important, and is generally less than the equivalent of the thermoplastic synthetic resin forming the image-receiving layer, preferably less than 50% by weight, most preferably less than 30% by weight. It can be contained within a range. However, if the content is less than 0.5% by weight, the effect of improving recording sensitivity will be insufficient, so the content is preferably 1% by weight or more.

The image-receiving layer forming the image-receiving sheet of the present invention contains at least one type of thermoplastic synthetic resin and at least one type of crystalline aromatic compound fine particles as described above, and if necessary, methyl cellulose, ethyl cellulose, hydroxyl Propyl cellulose, 8 powder, polyvinyl alcohol, polyamide resin, phenolic resin, melamine resin,
Other resin materials such as urea resin, urethane resin, epoxy resin, silicone resin, and fluororesin may also be contained. In addition, polyvalent isocyanate compounds, epoxy compounds,
It is also possible to modify the image-receiving layer by adding reactive compounds such as organometallic compounds.

However, it is necessary to keep the thermoplastic synthetic resin constituting the image-receiving layer within a range where it does not lose its thermal stability.

Furthermore, the image-receiving layer contains inorganic materials such as heavy and light calcium carbonate, talc, clay, natural 1 synthetic silicic acids, titanium oxide, aluminum hydroxide, zinc oxide, urea-formaldehyde resin powder, etc., for the purpose of improving writing properties. Various auxiliary agents such as organic pigments, ultraviolet absorbers, antioxidants, antistatic agents, mold release agents, and lubricants can also be added.

The coating amount of the constituent components forming the image-receiving layer on the support is appropriately selected depending on the intended use of the image-receiving sheet, etc.; . Also,
Plain paper, synthetic paper, synthetic resin film, etc. are appropriately selected and used as the support, but f
It is preferable to use iff1 paper. Note that plain paper here refers to, for example, paper made by ordinary paper making with cellulose pulp as the main component and addition of paper strength agents, sizing agents, fixing agents, inorganic and organic fillers, etc. This includes paper that has improved surface properties by size-pressing oxidized starch or by providing a pre-coat layer mainly composed of pigments such as clay.

In addition, on the image-receiving layer, for example, Japanese Patent Laid-Open No. 59-16568
No. 8, JP-A No. 61-27290, etc., a thin heat-resistant peeling layer mainly composed of a silicone resin or the like that has the property of transmitting sublimation dyes is formed to It is also possible to prevent the dye or dye layer from being directly transferred from the material transfer sheet.

The image-receiving sheet for thermal transfer recording of the present invention thus obtained is:
In particular, it exhibits extremely excellent performance as an image-receiving sheet when a sheet containing heat-sublimable dye is used as a color material transfer sheet, and has excellent recording sensitivity, producing clear recorded images with high color density. Furthermore, the storage stability of the recorded image is significantly improved.

The reason why such excellent effects are obtained is not necessarily clear, but due to the excellent affinity between the crystalline aromatic compound fine particles contained in the image-receiving layer and the heat-sublimable dye, The transferred dye is received extremely efficiently, and since the aromatic compound exists in the form of fine particles in the image-receiving layer, the contact area between the dye and the thermoplastic synthetic resin that makes up the image-receiving layer increases, and the molecular state changes. It is presumed that this enhances the diffusion and absorption ability of the dye, contributing to the development of dissolved color, and also contributing to the stability of the dyed image after recording.

The heat sublimable dye referred to in the present invention does not cause colorant transfer even when it comes into contact with an image receiving sheet under normal handling conditions;
For example, it refers to dyes that only undergo coloring transfer by melting, oxidation, sublimation, etc. when heated above 60°C, such as disperse dyes such as azo, nitro, anthraquinone, quinoline, etc. The dye is appropriately selected from among various dyes such as basic dyes typified by phenylmethane and fluoran dyes, and oil-soluble dyes.

In addition, the image receiving sheet for thermal transfer recording of the present invention can be used not only by a thermal recording method in which contact heating is performed using a hot plate or a thermal head of a thermal printing unit, but also by heat radiation such as an infrared lamp, a YAG laser, a carbon dioxide laser, etc. It can also be used for thermal recording using non-contact heating methods.

The present invention will be described below in more detail with reference to Examples, but it is of course not limited to these Examples. Further, unless otherwise specified, parts and % in the examples represent "parts by weight" and "% by weight", respectively.

Example 1 100 parts of 1,2-bis(3-methylphenoxy)ethane and water were added to 100 parts of a 10% aqueous solution of polyvinyl alcohol, 1.7 parts of a dispersant, and 0.3 parts of an antifoaming agent to give a solid content concentration of 3.
A 4% aqueous dispersion was prepared, treated with a sand mill to atomize it to an average particle size of 1.9 μm, and 10 parts of it was added to an aqueous polyester resin (trade name: Vylonal MD-1200).
, manufactured by Toyobo Co., Ltd.), and the resulting coating solution was applied onto a commercially available double-sided coated paper (105 g/rr?) at a dry coating weight of 10 g/rr, and dried to form an image-receiving layer. Formed.

Next, 100 parts of a silicone resin (trade name: Shin-Etsu Silicone S 705 F, manufactured by Shin-Etsu Chemical Co., Ltd.) and a silicone resin curing agent (trade name: Shin-Etsu Silicon Power Talist P) are placed on the image-receiving layer.
S, Shin-Etsu Chemical! 4 parts of silicone resin curing accelerator (product name: Shin-Etsu Silicon Power Talyst PD, manufactured by Shin-Etsu Chemical Co., Ltd.) 2
A coating liquid consisting of 100 parts of toluene and 100 parts of toluene was applied in a dry coating amount of 0.
3g/n? The coating was coated and dried, heat-cured at 100° C. for 2 minutes, and smoothed using a supercalender to obtain an image-receiving sheet for thermal transfer recording.

Comparative Example 1 An image-receiving sheet was obtained in the same manner as in Example 1, except that only an aqueous polyester resin was used as the coating liquid for forming the image-receiving layer.

A quality comparison test was conducted on the two types of image receiving sheets for thermal transfer recording thus obtained as follows.

That is, 1 part of heat sublimable dye (Disper Red 60),
185 parts of ethyl cellulose, 1 part of isopropyl alcohol
A dye ink with an average particle size of 1 μm prepared by mixing and pulverizing and dispersing 0 parts of ethanol and 5 parts of ethanol in a sand mill was mixed into a dye ink with a thickness of 6 μm.
On the untreated side of the heat-resistant treated polyester film, a dry coating weight of 1. A color material transfer sheet was prepared by solid gravure printing so that the g/m.

Next, the coated surfaces of the color material transfer sheet and the image receiving sheet for thermal transfer recording are overlapped, and heat is gently applied from the back side of the color material transfer sheet using a head (12 V, 2 to 8 m5ec) to form a thermal transfer recorded image on the image receiving surface of the image receiving sheet. I got it.

The density of the obtained recorded image was measured using a Macbeth color densitometer, and the results are shown in Table 1.

Table 1 Examples 2-6. Comparative Examples 2 to 4 Aqueous dispersions having various average particle sizes as shown in Table 2 were prepared by changing the sand mill conditions of 1.2-bis(3-methylphenoxy)ethane, and the blending amount was Eight types of image-receiving sheets were prepared in the same manner as in Example 1, except for the changes shown in Table 2, and the recording sensitivity, recorded image quality, and storage stability were evaluated, and the results are also shown in Table 2. The storage stability was evaluated by the amount of bleed that appeared on the recorded image after it was left for one month. The evaluation criteria are as follows.

○: (f! is written.

△: There is a problem with Jitsukawa.

×: Inferior and not suitable for practical use.

Table 2 Examples 7-13. Comparative Examples 5-6 Ten types were prepared in the same manner as in Example 1, except that a compound having the type, melting point, and average particle size shown below was used in place of 1.2-bis(3-methylphenoxy)ethane. An image receiving sheet was manufactured, a thermal transfer recorded image was formed in the same manner as in Example 1, and the recorded image density at a pulse width of 61 nsec was measured using a Macbeth color densitometer, and the results are also listed below.

[Example 7] Compound: 1-phenoxy-2-(p-methylphenoxy)ethane (m, p, 99°C, 2.5 μm) Recording density: ], 4
1 [Example 8] Compound: 1-phenoxy-2-(p-chlorophenoxy)ethane (m, p, 100°C, 1.7 μm) Recording 4 degrees: 1.5
5 [Example 9] Compound: 1-phenoxy-2-(p-methoxyphenoxy)ethane (m, p, 103°C, 1.9 μm) Recording density: 1.4
6 [Example 10] Compound h: 1.2-bis(p-methylphenoxy)ethane (m, p, 135°C, 2.1 μm) Recording density: 1.0
+ [Example 1)) Compound = 1-phenoxy-2-(β-naphthoxy)ethane (m, p, 137°C, 2.9 μm) Recording density: 1.0
5 [Example 12] Compound: 2-(2'-hydroxy-5'-methylphenyl)-benzotriazole (m, p, 129°C, 2.3 um) Recording density: 1.2
9 [Example 13] Compound: 2-hydroxy-4-methoxybenzophenone (m, p, 63°C, 3.0 μm) Recording density: 1.
18 [Example 14] Compound: β-naphthylbenzyl ether (m, p, 9
3°C, 4.6 μm) Recording density: 1.19 [Comparative Example 5] Compound nistearic acid amide (n+, p, 95°C, 4.5 μm) Recording density 1.
73 [Comparative Example 6] Compound: Paraffin wax (m, p, 77°C, 1.9.crm) Recording density:
O, Sl "Effect" As is clear from the results of each example, clear recorded images were obtained in all of the image receiving sheets for thermal transfer recording of the present invention.

Claims (4)

[Claims] (1) An image-receiving sheet for thermal transfer recording that receives a transferred image from a color material transfer sheet, wherein the image-receiving layer of the image-receiving sheet contains a thermoplastic synthetic resin and crystalline aromatic compound fine particles. sheet. (2) The melting point of the crystalline aromatic compound fine particles is 60 to 130
The image-receiving sheet according to claim (1), wherein the temperature is .degree. (3) The average particle diameter of the crystalline aromatic compound fine particles is 0.1
The image-receiving sheet according to claims (1) and (2), which has a thickness of 3 μm. (4) The content of the crystalline aromatic compound fine particles is 1 to 30% by weight of the thermoplastic synthetic resin.
Image receiving sheet described in section 3).