JPS59223425A - Heat transferred image receiving element - Google Patents

Abstract

PURPOSE:To make it possible to control occurrence of so-called stepwise unevenness, and to obtain a heat transferred image receiving element capable of obtaining a significant highest-density while restraining occurrence of fog by coating a support specified in extention coefft. in heating in specified conditions with the image receiving layer of PVC or laminating the image receiving layer on the support. CONSTITUTION:An image receiving layer contg. PVC is formed on a support having an extension coefft. within + or -5%. The support is embodied as follows: photographic baryta paper, ivory paper, capacitor paper, and a film of polycarbonate, polyether sulfone, polyimide, etc. An amt. of the image receiving layer contg. PVC to be formed by coating or laminated is 1-500g/m<2>, preferably 5- 300g/m<2>.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an image-receiving element that is placed in a stacked relationship with a heat-developable photosensitive element at least during thermal transfer, the image receiving element being contained in a photographic constituent layer of the photosensitive element. The present invention relates to an image receiver to which a thermal transfer dye released or formed by thermal development from a thermal transferable dye-providing material is thermally transferred. Specifically, the present invention relates to an image receiving element for thermal transfer that can obtain a sufficiently high maximum density while suppressing the occurrence of fog, and can suppress the occurrence of uneven printing.

[Prior art]

The conventionally known color photographic method using photosensitive silver halide is superior to other color photographic methods in terms of photosensitivity, gradation, and image preservation, and is the most widely put into practical use. It's here. However, in this method, wet processing is used for steps such as development, bleaching, fixing, and washing with water, so the processing is time-consuming and labor-intensive, and there are concerns that the processing chemicals may cause pollution to the human body. There are many problems, such as concerns about contamination of the processing chamber and workers with processing chemicals, and the time and cost involved in processing waste liquid.

Therefore, there has been a demand for the development of a method for forming color images that allows dry processing.

Heat-developable black-and-white photosensitive materials characterized in that the development process is carried out by heat treatment have been known for a long time.
No. 4921 and No. 43-4924 disclose photosensitive materials comprising an organic acid silver salt, silver halide, and a developer. Furthermore, many thermal fIL image color photosensitive materials are also known, to which this heat-developable black-and-white photosensitive material is applied.

For example, U.S. Patent Nos. 3,531,286 and 3,761.
, No. 270, No. 3,764,328, Research φdis 40 jar t @ 15108, No. U.S. Patent No. 3,180,731, Research Fist Disclosure TT13443 and U.S. Pat.
1L14347 etc. include Royco 1, U.S. Pat.
37 and m19419 etc., U.S. Patent No. 4.124,398, regarding the application of silver bleaching method,
No. 4.124.387 and No. 4.123,273 each describe a method for thermally bleaching photothermographic materials.

However, these proposals regarding heat-developable photosensitive materials were difficult or impossible to bleach or fix the black, white, and silver images formed at the same time. Even if there is a method, it requires wet processing, etc.Therefore, these proposals are not favorable, as it is difficult to obtain clear color images, and they require complicated post-processing. .

On the other hand, a heat-developable color photosensitive material was developed in which a color image was obtained by transferring diffusible dyes released during heat development.
No. 179840, No. 57-186744, No. 57-1
No. 98458, No. 57-207250, No. 58-40
551 and No. 58-58543, and also in the specifications of Japanese Patent Application No. 57-122596 and No. 57-229649 filed by the present inventors.

In these proposals, a dye-donating substance containing a diffusible dye in the same molecule releases the diffusible dye through a heat development reaction of an organic silver salt and transfers it to an image-receiving layer to obtain a color image. In this specification, this is referred to as a "dye-releasing type."

Also, patent application No. 57-229671 by the present inventors, etc.
No. 58-33363 and No. 58-33364, the proposal is that a colorless or light-colored dye-donating substance is an oxidized product of a color developing agent produced by a thermal development reaction of an organic silver salt. The dye reacts to form a heat-diffusible dye, which is transferred to the image-receiving layer to obtain both images, and is referred to herein as a "dye-forming type".

However, in both the dye-releasing type and the dye-forming type, fog occurs when trying to obtain a sufficiently high maximum density, and when fog is suppressed, only a low maximum density can be obtained, which is still insufficient for practical use. It is. Furthermore, at least during thermal transfer, a photosensitive element having a photographic constituent layer containing a dye-providing substance and an image receiving element are placed in a stacked relationship and heated externally. The entire stack of photographic materials is heated through a rotating drum and a reversing path arranged along the side portions of the rotating drum 7 (a reversing path formed by a heating element with a semicircular cross section and a trap). When using a conveyance heating blade ♂-〇 thermal transfer device (for example, refer to 3M's Debate Page Module 277, etc.), the color R image obtained on the image receiving element appears as a step-like pattern. A phenomenon of unevenness may occur.

Therefore, it is desired to develop a thermal transfer technique that can obtain a sufficiently high maximum density while suppressing the occurrence of fog, and can also suppress the occurrence of so-called step mold.

As a result of continuing research on this technical problem, the inventors of the present invention have found that both in the dye-releasing type and in the dye-forming type pressure, color images can be obtained by thermal diffusion and transfer and dyeing to the image-receiving layer. It has been found that the characteristics of this image-receiving element greatly control the quality of the obtained color image. Furthermore, it has been found that the characteristics of the image-receiving element have a large influence on the occurrence or degree of occurrence of so-called step unevenness, which is likely to occur when performing thermal transfer using, for example, a thermal transfer device of a reversal path conveyance/heating type.

However, in the conventional techniques related to dye-releasing or dye-forming heat-developable color photographic materials, most of the means for obtaining fogging and high-density color images are based on improvements in photosensitive elements containing dye-providing substances. In particular, to the best of the inventors' knowledge, there are no documents that describe so-called means for solving unevenness in rows. That is, for example, the above-mentioned Japanese Patent Application Laid-Open No.
No. 7-207250 proposes an image-receiving element similar to a support in which the support of a heat-developable color photographic material is capable of receiving an image of a dye. He stated that by using a support made of a polymeric material, it is possible to form a clear image in which only the dye penetrates into the support. It also states that it may be set up in the place, but! l There is no mention at all of suppressing unevenness in rows. The publication also mentions examples of dye-receptive organic polymer substances with glass transition temperatures of 40°C or higher, 2.
A wide range of organic polymeric substances that are heat resistant to temperatures below 50°C have been listed, with 1. Cellulose acetate film such as triacetate, diacetate, heptamethylene diamine]/and terephthalic acid, fluorene dipropylamine and adipic acid, hexamethylene diamine and diphen, polyamide film made from a combination of hexamethylene diamine and isophthalic acid, etc., diethylene glycol and diphenylcarboxylic acid, bis-1
)-, /polyester film, polyethylene terephthalate film, and polycarbonate film made of a combination of fluboxyphenoxybutane and ethylene glycol.

However, even with these specific examples listed as particularly useful supports, it is difficult to obtain high-density color images while suppressing fogging and/or to suppress so-called step unevenness. The present inventors learned this as a result of various experiments.

[Purpose of the invention]

Therefore, it is an object of the present invention to provide a thermal transfer method that can suppress the occurrence of so-called unevenness in printing, which would need to be solved in practical use, and that can obtain a high maximum density while suppressing the occurrence of fogging. An object of the present invention is to provide an image-receiving element for use.

[Summary of the invention]
.

In order to achieve the above object, the present inventors continued intensive research and found that the expansion/contraction rate when heated at 150°C for 30 seconds was ±5.
It has been found that this object can be achieved by an image-receiving element for thermal transfer, which is characterized by having an image-receiving layer containing a vinyl chloride monopolymer on a support. That is, in the form of an image-receiving element having an image-receiving layer formed of an organic polymer material on a support, the present inventors have developed a method using a specific support and a specific organic polymer.

It has been found that the object of the invention can be achieved by selecting an image receiving layer consisting of a dry material. As is clear from the description in the above-mentioned patent publication, for vinyl chloride polymers, the glass transition temperature is 40°C or higher, 250"
Although it is one of the examples of heat-resistant polymer materials with a temperature of C or lower, it is not listed as a particularly useful example 1. At present, the vinyl chloride polymer is used as an image-receiving layer, and at 150° C., 3
(1!iJj.

It was surprising that the object of the present invention could be achieved by laminating or laminating a support with an expansion/contraction rate of 15% or less upon heating.

[Structure of the invention]

The present invention will be explained below.

The support used in the present invention is a material whose expansion/contraction rate is within ±55 when heated at 150'C for 30 seconds. The method for testing the expansion/contraction rate of the support is as follows.

An electric iron type heat block with a smooth bottom (square shape) measuring 15 crn in length and width and weighing 1 Kf was used.
℃, and heated at 25℃ by placing the heat block on a square support (test piece) of 10 m in length and width placed on a flat table for 30 seconds. (This is called "constant heating.") The constant heated support was left at a temperature of 25° C. for 10 minutes, and the support according to the present invention has length and width within ±55 percentage points with respect to the initial length and width of 10 cIn. This is the support used. In other words, if the support, which was 10 crn in length and width, is heat-shrinked in the measurements after the above-mentioned constant heating, the heat shrinkage rate is within a factor of 5, that is, 9. 5crR or more, on the other hand,
In the case of hot stretching, it means that the hot stretching ratio is within 596, that is, 1O15 or less in both length and width.

Specific examples of the support used in the present invention include paper, photographic baryta paper, Ipoly paper, capacitor paper, polycarbonate film, polyether sulfone film, polyimide film, cellulose ester film, acetyl cellulose film, and polyvinyl acetal film. , a polyethylene terephthalate film (preferably a polyethylene terephthalate film having a crystallinity of 40 or more). Used in the present invention;, + :i
As a specific example of the support, in addition to being within the thermal expansion/contraction rate of the present invention, it is also possible to use it in a wide range of thermal transfer devices, especially for thermal transfer using a reverse path conveyance heating method. This is preferable because it can also be suitably used for devices. However, the application of the image receiving element of the present invention is not limited to such a specific thermal transfer device, and therefore, in addition to the above-mentioned specific examples, glass, metal, or ceramic may be used as a support, or However, this does not preclude the use of heat-resistant organic polymeric substances or inorganic substances that have no or poor flexibility.

There is no particular limitation on the thickness of the support used in the present invention, but polyethylene terephthalate with a crystallinity of 40 or more is used, for example, so that it can be suitably used in a thermal transfer device using a reverse path conveyance heating method. When a film such as a film is used, it is 5 μm"w500 am1, preferably 15 μm to 300 μm.

The image receiving layer in the image receiving element of the present invention comprises a vinyl chloride polymer. The vinyl chloride polymer used in the present invention is produced by polymerizing vinyl chloride by suspension polymerization, bulk polymerization, or emulsion polymerization by irradiation with light or alpha rays, or in the presence of a free radical polymerization catalyst such as peroxide. , a homogeneous solution polymerization method, a precipitation solution polymerization method, etc. The polymer of the present invention may be polyvinyl chloride, which is a homopolymer of vinyl chloride, but if it contains 50 moles or more of vinyl chloride, other monomers such as vinyl acetate, vinyl propionate,
Alkyl esters of unsaturated fatty acids such as vinyl palmate and vinyl tallow, acrylic acid, methacrylic acid, methyl acrylate, ethyl methacrylate, butyl acrylate, 2-methacrylate and droxyethyl acrylate, acrylic acid Acrylic acid or methacrylic acid such as 2-ethylhexyl and its alkyl esters,
maleic acid, diethyl ruinate, dibutyl maleate,
Maleic acid and seven alkyl esters such as dioctyl maleate, methyl vinyl ether, 2-ethylhexyl vinyl ether, lauryl vinyl ether, valmityl vinyl ether, alkyl vinyl ethers of stearyl vinyl ether, vinylidene chloride, ethylene, zurobylene, acrylonitrile, etc. , methacriminitrile, styrene, rostyrene, itaconic acid and its alkyl esters, crotonic acid and (
Copolymers with D-alkyl esters, polyhalogenated olefins such as ethylene, trifluoroethylene, cycloolefins such as cyclopentene, aconitic acid esters, vinyl benzoate, and vinylbenzoyl ether (Dulant copolymer) (including polymers). The degree of polymerization of vinyl chloride polymer is 672 according to JI8.
However, in the present invention, both homopolymers and copolymers can be used regardless of the degree of polymerization.

The image-receiving layer of the present invention may contain various additives, and for example, a plasticizer is preferably added to impart plasticity. Examples of plasticizers include phthalate esters (e.g. dimethyl phthalate, dibutyl phthalate, dioctyl phthalate, didecyl phthalate, etc.), adipic esters (
Diocudele adipate, methyl lauryl adipate,
di-2-ethylhexyl adipate, ethyl adipate (2-ethylhexyl adipate), other oleic acid esters, succinic acid esters, maleic acid esters, sepatic acid esters, citric acid esters, epoxy stearic acid esters, and These include phosphoric acid esters such as triphenyl phosphate and tricresyl phosphate, and glycol esters such as ethyl heptallylethyl glycolate and butylphthalyl butyl glycolate. In the thermal transfer image-receiving element of the present invention, addition of a plasticizer not only imparts plasticity but also contributes to improving the color patch transfer efficiency and improving the light resistance of the transferred image. The amount of plasticizer added varies depending on the type of plasticizer, but it is usually 0% by weight relative to the vinyl chloride polymer.
．． The range is 1 to 50, preferably 05 to 45.

A stabilizer is preferably added to the image-receiving layer of the present invention in order to prevent decomposition and modification of the vinyl chloride polymer due to dehydrochlorination. Stabilizers include metal soaps (e.g., stearates of lead, zinc, barium, calcium, etc.), organic tin compounds (e.g., dibutyltin diisooctyl maleate, dibutyltin dilaurate, diptino-tin-tin-thioglycolate, dibutyltin lauryl mercaptide, dioctyltin malenyt, etc.)
etc.

Mixing, so-called polymer blending, may also be carried out. Reinforcing agents to increase physical strength include chlorinated polyethylene, ethylene-vinyl acetate copolymer, polybutadiene, neoprene, isopethylene polymer, inprene polymer, methyl methacrylate-phytadiene-styrene copolymer (1'7''') lonitrile, Examples include butadiene-styrene copolymer, acrylonitrile-butadiene copolymer, styrene-butadiene copolymer, etc.In order to improve heat resistance, polymers containing α-methylstyrene, vinylcarbazole, and acenaphthylene are effective. A vinyl chloride polymer containing poly-α-methylstyrene has a small heat shrinkage rate and excellent dimensional stability.Furthermore, the image-receiving layer of the present invention contains polyvinyl biaridon, polyvinyl butyral, saturated polyester, etc. A polymer having excellent retention properties may be added.

These other polymers are used in up to 50 volumes of the image receiving layer.

In order to increase the effectiveness in manufacturing and processing and improve the quality of the image-receiving layer of the present invention, after thermal transfer,
i□ Addition of an abrasive (slip agent) is effective in order to separate the image-receiving layer from the photosensitive element or photosensitive layer. As for erasure,
Examples include liquid paraffin, low-molecular-weight polystyrene, softened hydrogen such as tyrene, aliphatic alcohols such as stearyl alcohol and cetyl alcohol, aliphatic ketones such as stearone and palmitone, fatty acids such as stearic acid and lauric acid, and stearic acid. fatty acid amides such as amide, oleic acid amide, and methylenesteamibisamide; waxes such as cetyl valmitate; diethylene glyc; polyalcohol esters of fur monooleate fxE;
Other examples include chlorinated naphthalene, chlorinated diphenyl, fluorocarbon resin, silicone oil, silicone resin, and finely divided silicic anhydride.

The image-receiving layer of the present invention preferably contains an antistatic agent. Usual anionic surfactants, cationic surfactants, nonionic surfactants, and amphoteric surfactants are used.

In addition to the above, it is also possible to add i1 antioxidants, ultraviolet absorbers, dyes, pigments, etc. to the image receiving element for thermal transfer of the present invention.

The method of manufacturing the image receiving element of the present invention is arbitrary. For example, it can be produced by coating or laminating an image-receiving layer containing a vinyl chloride polymer on the support of the present invention. In addition to this method, a method may be adopted in which a coating solution constituting the support of the present invention is coated on a vinyl chloride polymer film or sheet constituting the image-receiving layer of the present invention, or a coating solution is vapor-deposited. . However, in view of cost, the coating method and the lamination method are advantageous, and the vinyl chloride polymer constituting the image-receiving layer of the present invention or a coating liquid containing the polymer as a main component is coated on the support. To prepare, a solution using tetrahydrofuran, methyl ethyl ketone, toluene, xylene, chloroform, dioxane, acetone, etc. is used as a solvent, or a vinyl chloride polymer is prepared by emulsion polymerization, preferably an aqueous dispersion. be. As the coating method on the support, commonly used methods can be applied, such as dipping method, dipping method, roller method, reverse roll method, air knife method,
Examples include a doctor blade method, a spray method, an extrusion method, a bead method, a trench affix method, and a curtain method.

On the other hand, in order to 2-laminate a vinyl chloride polymer or a film or sheet containing the polymer as a main component on the support, a 7'C film or sheet lamination is formed in advance, and the film or sheet is laminated with the support, heated, and sealed. , high frequency welding method,
A laminating method such as ultrasonic welding is used. The amount of the image-receiving layer containing the vinyl chloride polymer coated or laminated on the support is Ig/- to 500
g/'m''N preferably 5g/nl~300g
/-.

The thermal transfer image-receiving element of the present invention can be provided with a support containing a white pigment or a white reflective layer in order to view a reflected image. Examples of white pigments include titanium white, magnesium carbonate, zinc oxide, barium sulfate, silica, Merck, clay, and calcium carbonate. In addition, in order to provide both light and light effects to the support, a black pigment may be added to the support, or a light-shielding layer may be provided. Examples of black pigments include carbon blank, manganese dioxide, and graphite. As described above, the image-receiving element of the present invention may have one or more photographic constituent layers other than the image-receiving layer of the present invention.

The relationship between the image receiving element of the present invention and the photosensitive element layer used in combination with the image receiving element may be in any conventionally known form. (2) The image-receiving element of the present invention is placed in a stacked relationship with respect to the photographic constituent layers of the photosensitive element during thermal transfer after thermal development. (3) The image-receiving element of the present invention is integrally provided on the photographic constituent layer of the photosensitive element, and imagewise exposure and thermal development are performed through the image-receiving element. It can be any of the following, and [1]
In the present invention, thermal transfer means that the image-receiving element of the present invention is in a format in which the image-receiving element of the present invention is peeled off after thermal transfer, and [''] in a format in which the image-receiving element of the present invention is not peeled off after thermal transfer.
1'□ Sublimation, vaporization, evaporation, melting, or dissolution with a solvent, diffusion, and transfer.

The thermal transfer image-receiving element of the present invention can be applied to either the dye-releasing type or dye-forming type photothermographic element. Because of its polarity, it exhibits excellent suitability for thermal transfer and dyeing of amethine or indoaniline dyes formed by campling with oxidized forms of color-forming imaging agents.

Preferred examples of such dyes are shown in the specifications of Japanese Patent Application No. 57-229671, No. 58-33363, and No. 58-33364 written by the present inventor.

For the thermal transfer image-receiving element of the present invention, thermal transfer is performed when the photothermographic element is thermally developed or when it is reheated after thermal development. For heating for packaging, all methods that can be applied to ordinary heat-developable photographic materials can be used. For example, contact with a heated block or plate 1. When the image is brought into contact with a heated roller or a heated drum, passed through a high-temperature atmosphere, or subjected to high-frequency heating, the photosensitive element for thermal development or the image-receiving element for thermal transfer of the present invention may be used. It is also possible to provide a conductive layer on the substrate and utilize Joule heat generated by electricity or a strong magnetic field. There are no particular restrictions on the heating pattern, including preheating and then reheating, heating at a high temperature for a short period of time, or heating at a low temperature for a long period of time, rising and falling in a continuous manner, or Although barb or even discontinuous heating is possible, a simple pattern is preferred. Usually, the heating temperature during transfer is 80 DEG C. to 200 DEG C., preferably 80 DEG C. to 160 DEG C., and the heating time is in the range of 1 second to 1 minute, preferably 1 second to 40 seconds.

For thermal transfer using the image receiving element for thermal transfer of the present invention, a commercially available thermal developing machine can be easily used. For example, “Image forming model 4634 # (Sony Tektronix), 1 developer module 277” (3M)
, ``Video Hard Copy Unit NWZ-301'' (Japan Radio Co., Ltd.).

〔Example〕

Examples below? ]? The present invention is illustrated in detail.

Example-1 To 7.45 g of 4-sulfobenzotriazole, 24-g of Eslenc W-201,8 aqueous solution, 1.3 g of ossein gelatin, 110-g of water, and 25-g of methanol were added, and dispersed in an alumina ball mill. Several solutions of silver salt were obtained.

0.21 g of 7-talic acid was added to this silver salt dispersion 25-.

0.16g of phthalazine, 044g1 of the following compound X-1
The following developing agent Dev-1 was added to O, 1.8 g of 421 1,3-dimethylurea, and 5-1 water-soluble 8-1 aqueous solution of water-soluble polyhinyl alcohol (105, Kuraray), and 10-1 water with an average particle size of 0.044 m. A silver iodide emulsion was added with 36η in terms of silver, and a wet film thickness of 55 was added on photographic Panoita paper.
A photosensitive element having a photosensitive layer was obtained by coating with a wire bar so as to have a thickness of .mu.m.

The dried heat-developable photosensitive element sample was passed through a step wedge for 30 minutes. Exposure of OOOCMS was given.

On the other hand, the thermal transfer image receiving element of the present invention has a thickness of 1100 mm.
a, polyvinyl chloride (
An image-receiving element having an image-receiving layer was obtained by applying a 120 μm wet film thickness of 1(l) tetrahydrocarbon-furan solution (Altron, Mitsubishi Monjont).

Exposed sample and image receiving element for thermal transfer (10 cm each)
m samples) were stacked and subjected to constant heating according to the present invention, that is, an electric iron type heat block with a surface temperature of 150°C for 30 minutes.
After applying pressure and heating for a second, it was immediately peeled off.

A step wedge image with a maximum reflection density of 1.45 and a minimum reflection density of 0.06 at 642 mm was obtained on the surface of the image receiving element of the present invention.

(X-1) 05H The thermal shrinkage rate of the image receiving element of the present invention at this time was 1.6.

Example 2 A sample E of the photosensitive element was prepared in the same manner as in Example 1.
A 100 μm thick transparent polyimide film (KAPTON, manufactured by DuPont) was used as a support.

On the other hand, as an image-receiving element for thermal transfer, a polyvinyl chloride solution was coated on a transparent polyethylene terephthalate film having a thickness of 50 μm, a crystallinity of 53.8 or more, and a density of 1.397 under the same conditions as in Example 1 to receive an image. A layer was formed, and a white reflective layer having the following composition was further provided thereon.

<White reflective layer> (Unit: g7) Titanium dioxide (average particle size 1.5 μm) 12 Eslenc W-201
(Made by Building Block Chemical Co., Ltd.) 1, 3 The photothermographic element and the image receiving element for thermal transfer (10 vertical and horizontal samples each) were stacked and fixed, and passed through a step wedge with a step height of 0.15 from the polyimide film support side.30. OOOCMS exposure was applied, and constant heating of the present invention was performed in the same manner as in Example-1.

On the polyethylene terephthalate film side of the image receiving element of the present invention, a step wedge negative image with a maximum density of 1.38 and a minimum density of [0.05] at 642 mm was obtained.

Further, the thermal shrinkage rate of this image receiving element for thermal transfer was less than 1 liter.

Example-3 The heat-developable photosensitive element used in Example-1 was used, and the image-receiving element shown in Table 1 below was used.
Directly, the exposed photosensitive element and image receiving element are stacked and fixed, and devanper module 2 Fufu thermal transfer device (
(manufactured by 3M Company) was used for treatment at a heating temperature of 150° C. for 30 seconds.

After the treatment, it was immediately peeled off, the maximum reflection density and the minimum reflection density at 642 mm were measured, and the occurrence of unevenness was visually determined. Incidentally, the column unevenness was determined according to a three-step method: ◯ indicates no occurrence, Δ indicates slight occurrence, and x indicates occurrence frequently. The results are shown in Table-2.

Table-1 Note 1. For samples Mal~8, each film was 100 μm thick. >, Samples Na9 to 14 were obtained by coating the solution or latex of each material on the support.

Note 2. Samples N11L1-8 are of a type in which the image-receiving layer also serves as a support, and samples N19-13 are transparent polyethylene terephthalate films with a thickness of 100 μm (heat shrinkage rate of 1 or less according to the measuring method of the present invention) t- As a support, sample Na14 was a tube support made of a polycarbonate film (heat-shrinkable: 10 mm or more) with a thickness of 100 #m.

Note 3. Vinyl foil (manufactured by Mitsubishi Plastics Co., Ltd.), silver note, Altron (Mitsubishi Montento Co., Ltd. MA), below margin table-2 Note: Samples 1m4.5 and 7 could not be evaluated because their image-receiving layers were destroyed. Further, since Nn12 has almost no concentration, it was not possible to evaluate the presence of step unevenness.

As is clear from the results in Table 2, the sample of the present invention (Nl
Only the method 13) can obtain a high fI & power image while suppressing the occurrence of fog, and can also suppress the occurrence of unevenness.

Patent applicant: Konishiroku Photo Industry Co., Ltd. Agent: Nobuaki Sakaguchi (and one other person)

Claims (1)

[Claims] An image-receiving element for thermal transfer, comprising an image-receiving layer containing a vinyl chloride polymer on a support whose expansion/contraction ratio is within ±5 when heated at 150° C. for 30 seconds.