JPH04127155A - Photosensitive material for heat development - Google Patents

Abstract

PURPOSE:To obtain images having less unequal colors by applying microcapsules contg. a silver halide, reducing agent, polymerizable compd., and color materials onto a plastic film which is specified in thickness and heating elongation and contraction rate and is deposited with aluminum by evaporation on the surface. CONSTITUTION:The plastic film which has <=75mu thickness and is -5 to +0.5% both longitudinally and transversely in the heating elongation and contraction rate measured in a 120 to 180 deg.C temp. range and is subjected ot the vapor deposition treatment of the aluminum on its surface is used as the base of the photosensitive material. The photosensitive material for heat development formed by applying the microcapsule contg. at least the silver halide, reducing agent, polymerizable compd., and color materials on such plastic film is used. the elongation and contraction of the base are decreased in this way and the adhesion between the microcapsule layer and the base is improved. The unequal colors are thereby decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a photosensitive material that can form full-color images with a simple system.

"Prior Art" An image recording material having a photosensitive layer containing microcapsules containing a polymerizable compound, a leuco dye, and a photopolymerization initiator formed on a support is imagewise exposed, and the polymerizable compound is released in response to the exposure. After polymerization, the image recording material is superimposed on an image receiving material containing a leuco dye developer and pressurized to obtain an image-like colored image on the image receiving material. -7377 and No. 64-7378.

In this recording method, the polymerizable compound in a microcapsule containing a polymerizable compound and a leuco dye is exposed and polymerized depending on the amount of light, and the unpolymerized compound and the leuco dye are transferred from the image recording material to the image receiving material by pressure. The principle of recording is to obtain an image-like colored image by transferring the light onto the surface of a light source, and it is an excellent method for recording optical information with simple processing.

In this conventional recording method, a colorless leuco dye is used as a color image forming substance in order to provide sufficient exposure to the photopolymerization initiator. In order to further increase the sensitivity, an image recording material is disclosed in JP-A-62-222240, in which a photosensitive layer containing microcapsules containing a polymerizable compound, a leuco dye, and a photopolymerization initiator is provided on a support with high light reflectance. Unexamined Japanese Patent Publication 1986-20
No. 6737, JP-A-64-7033, JP-A-64-1
No. 7043 and Japanese Unexamined Patent Publication No. 63-303792. As this embodiment, an image recording material is described in which a photosensitive layer containing microcapsules containing a polymerizable compound, a leuco dye, and a photopolymerization initiator is provided on a support coated with aluminum. When such an image recording material is used, it is possible to effectively utilize the light scattered or passed through the transparent microcapsules, so it has the advantage that an image can be obtained with a relatively small amount of exposure.

On the other hand, a photosensitive material in which microcapsules containing at least silver halide, an original polymerizable compound, and a coloring material are coated on a support is known. For example, a photosensitive material for forming full-color images using a leuco dye as a coloring material is disclosed in JP-A-61-275742. Furthermore, a photosensitive material for forming full-color images using R-hulled rice as a coloring material is disclosed in Tokueki Publication No. 1-205883. Since these photosensitive materials use silver halide as a photosensor, they have a very high intensity.

In addition, the recording principle is to cure the microcapsules imagewise by thermally developing the photosensitive material after imagewise exposure, and then bursting the uncured microcapsules by pressure. No wet processing is required.

Plastic films such as polyethylene terephthalate films and paper are known as supports used in the above photosensitive materials.

On the other hand, in a photographic material that uses a polyester film as a support and undergoes heat treatment, a photographic material whose expansion and contraction ratio during heating is suppressed within a certain range was disclosed in Japanese Patent Application Laid-Open No. 61-113.
It is disclosed in Publication No. 058.

"Problem to be Solved by the Invention" When using a single independent sheet to form one image in the photosensitive material described above, the sheet needs to have a certain degree of strength as a support during transportation. Therefore, it is necessary to use a relatively thick one. For example, when using a plastic film as a support, usually 10
A material with a thickness of 0μ or more is used.

However, the use of a thick support has drawbacks such as increased cost and bulkiness, which reduces the number of usable sheets per volume when supplying the photosensitive material.

In order to avoid this drawback, there is a method of continuously transporting a long, unbroken, thin support in the form of a belt, but in this case, due to the problem of cutting, a plastic film is more suitable as the support. However, it has been found that when thermal development is carried out in this manner and by bringing the photosensitive material into contact with a heating body such as a heating drum, color unevenness occurs in the image.

``Problems to be Solved by the Invention'' An object of the present invention is to provide a photosensitive material that can produce images with less color unevenness in an image forming method that uses a thin plastic film as a support and includes heat development and pressure transfer steps. It is to submit.

"Means for solving the problem" The above purpose is to achieve a thickness of 75μ or less and a temperature range of 120℃ to 18℃.
At least silver halide, a reducing agent, and a polymerizable material are applied to the plastic film, which has a heating expansion/contraction rate measured at 0°C of 15% to +0.5% in both the longitudinal and lateral directions, and has an aluminum coating on the surface. This was achieved using a heat-developable photosensitive material coated with microcapsules containing a compound and a coloring material.

Note that "+" in the heat expansion/contraction ratio indicates that the material has expanded by heating, and "-" indicates that it has shrunk by heating.

According to the research conducted by the present inventors, although color unevenness is caused by a plurality of causes, it has been found that the expansion and contraction of the support and the close contact between the microcapsule layer and the support are important points.

In other words, one of the causes of the above-mentioned unevenness is that when a thin film that is continuously conveyed is heated at high temperatures, the heated portion tends to stretch, and as a result, the contact of the photosensitive material with the heating body such as the heating drum is affected. It was found that this is due to the occurrence of non-uniformity. In order to prevent this unevenness, it has been found that it is effective to use a support whose thermal expansion/contraction rate is kept within a certain range. Particularly in the case of a support coated with aluminum, it is highly effective.

It has not been previously known that a full-color image can be obtained using a photosensitive material that is thermally developed at a high temperature using a thin film as a support.

In addition, according to the research of the present inventor, by performing heat development using a photosensitive material coated with microcapsules on the vapor deposition side of a support on which aluminum is vapor-deposited, polymerization within the microcapsules can be achieved. After curing the compound imagewise,
When superimposed on an image-receiving material and pressurized, the microcapsule layer and the support adhered well, and the problem of so-called "film peeling" could be solved.

It is not clear why a strong adhesion is exhibited when thermal development is performed using a support on which aluminum is vapor-deposited, but it is thought that the parent wood-like nature of aluminum has an effect.

This effect is particularly noticeable when a thin support is used. In other words, when a thin support was used, the adhesion of the capsule layer decreased during pressurization, possibly due to the low rigidity of the support itself, and "film peeling" was more likely to occur. It also solves the problem. Therefore, thinner supports that cost less and take up less storage space are now available.

The purpose of using an aluminum vapor-deposited support in the above-mentioned system using a photopolymerization initiator is to increase sensitivity, and by using an aluminum vapor-deposited support in a photosensitive material for heat development, it is possible to improve the sensitivity as described in the present invention. There was no mention of any adhesion improvement effect, which was unexpected.

"Detailed Description of the Invention" Photosensitive materials that can be used in the present invention will be described below.

First, the support for the photosensitive material is a plastic film with a thickness of 75 μm or less and a heat expansion/contraction rate of 15% to +0.5% in both the longitudinal and horizontal directions when measured in the temperature range of 120°C to 180°C, and as described below. In addition, its surface is coated with aluminum vapor deposition. The heating expansion/contraction rate is measured using J
The method for measuring heat shrinkage rate described in IS C2318 can be used.

Specific examples of plastic film materials include various plastic films or sheets such as polyester (polyethylene terephthalate, polyethylene naphthalene dicarboxylate, etc.), polyamide, polyolefin, polyvinyl chloride, polyethylene terephthalate, polystyrene, methacrylate, polycarbonate, etc. Examples include films or sheets that have been treated to provide white reflectivity.

A laminate made of any combination of the above-mentioned supports can also be used.

The thickness of the support is 75μ or less, more preferably in the range of 5μ to 50μ, but since the optimum value for handling varies depending on the material of the support, it is not limited to the above range.

Hereinafter, among the supports that can be used in the present invention, polyester films will be explained in detail.

The polyester film represented by polyethylene terephthalate that is preferably used in the present invention is usually produced by a biaxial stretching method, and the main method is longitudinal stretching → transverse stretching → heat setting and
Manufactured through a thermal relaxation process. Various stretching methods are known in the art; longitudinal stretching is described, for example, in U.S. Pat. No. 2,578,899;
, No. 379, No. 3,627,579, No. 4,020゜421, No. 2,779,684, No. 2,899.7
No. 13, Patent Publication No. 30-5639, Patent Publication No. 34-1996
No. 31-4236, etc. Further, regarding the temperature conditions, stretching ratio, gripping device method, heating method, etc. related to the lateral stretching method, for example, U.S. Patent No. 4,055
No. 9,667, No. 2゜904.841, No. 2,995
, No. 779, No. 3.068,528, No. 3,257,
No. 489, No. 4,042,569, No. 3,646,1
No. 88, Patent Publication No. 37-534, Publication No. 49-72
．． No. 370, Patent Publication No. 49-8, 515, 53-96
, No. 072, etc.

An example of the method for producing polyethylene terephthalate represented by the above patent is shown below.

Conventionally, the manufacturing method for biaxially stretched polyethylene terephthalate film is carried out as follows. Namely, a sheet-like polymer is pressed from an extruder and a die, cooled in a casting drum, and then preheated while passing between a group of preheating rolls. , the film is stretched and cooled in the traveling direction of the film, that is, the longitudinal direction.

Longitudinal stretching is carried out by passing the film through two sets of nip rolls and utilizing the difference in circumferential speed between the nip rolls. Both ends of the film are gripped with grips attached to an endless chain, introduced into a tenter, and after preheating, the film is stretched in the transverse direction. Stretch and heat treat.

The stretching temperature is 80°C to 150°C, and the heat treatment temperature is generally 180°C to 250°C.

The heating expansion/contraction rate in the present invention can be adjusted by adjusting the heat setting conditions after stretching.

The heat cent conditions vary depending on the longitudinal and transverse stretching conditions, but can be determined mainly by the transverse relaxation rate after transverse stretching, heat treatment temperature, and time.

When using the above film as a support, the surface of the polyester film may be treated or an undercoat layer may be provided to provide strong adhesion between the polyester film and the photosensitive layer containing microcapsules. . -The boat fishing method is described below. When the photosensitive layer is a hydrophilic layer, (1) chemical treatment, mechanical treatment, corona discharge treatment, flame treatment, ultraviolet treatment, high frequency treatment, glow discharge treatment, activated plasma treatment, high pressure steam treatment, desorption treatment (2) A method in which a photosensitive layer is applied after treatment such as laser treatment, mixed acid treatment, or ozone oxidation treatment to obtain adhesive strength; and (2) a method in which an undercoat layer is provided and a photosensitive layer is applied on this. There is one. In this case, it is advantageous to carry out the surface treatment before applying the undercoat layer.

(For example, U.S. Patent Nos. 2,698,241 and 2,7
No. 64,520, No. 3,072,483, No. 3,14
No. 3,421, 3. 145. No. 105, 3.1
No. 45.242, No. 3.360448, No. 3,376
．． No. 208, No. 3,475.193, No. 3,462,
No. 335, British Patent No. 788,365, 804,00
No. 5, Belgian Patent No. 663,578, etc.
No. 724.270, Tsunoda, “8th Cohabitation Study Group”, p. 93 (1970), Caldwell et al. J, Poly,
Sei.

C-'24 15 (1968), Iyengar,
J, Appl.

(See Poly, Sci, +Upper↓ 2311 (1967), etc.) Various methods have also been used to apply the undercoat layer. The so-called multilayer method, in which a layer containing a resin is provided and a hydrophilic resin layer is applied as a second layer on top of the layer,
There is a single layer method in which only one resin layer containing both hydrophobic groups and hydrophilic groups is applied.

All of these methods have been well studied and include copolymers starting from vinyl chloride, vinylidene chloride, methacrylic acid, acrylic acid, itaconic acid, maleic anhydride, etc., as well as polyethyleneimine and epoxy resins. , grafted gelatin-nitrocellulose, and many other resins have been investigated for their suitability.

In order to further improve the performance, methods have been adopted such as including a large amount of a solvent that swells or dissolves the polyester, a so-called highly polar etching agent with a high boiling point, in the undercoating solution.

These etching agents include, for example, aromatic rings (Hensen ring, naphthalene ring, pyridine ring, pyrrole ring, or fused rings thereof or alkyl, alkoxy, acyl, nitro, cyano, halogen atom, hydroxy, formyl, carboxy, alkoxycarbonyl, hydroxy alkyl, aminoalkyl, haloalkyl, etc.), or alcohol,
Ketones, carboxylic acids, esters, aldehydes, etc. (e.g. British Patent Nos. 772,600, 776.157, 7
85,789, 797,425, U.S. Patent No. 2,8
30.030, German Patent No. 1.020,457,
1,092,652, etc.).

Further, latenox, a synthetic polymer copolymer, may be used as the undercoat liquid.

Further, the support of the photosensitive material used in the present invention is one whose surface has been subjected to a thin aluminum coating treatment, but in this case, the above-mentioned undercoating treatment is not necessarily required.

As for the aluminum vapor deposition method, any conventionally known method can be used, such as the vacuum vapor deposition method described in the following literature.

"Plastic Film - Processing and Applications -" Plastic Film Research Complete Edition (P, 122-P, 1) Next, silver halide used in the present invention will be explained.

Light-sensitive materials contain silver chloride, silver bromide, silver halide,
Any grains of silver iodide, silver chlorobromide, silver chloroiodide, silver iodobromide, or silver chloroiodobromide can be used.

Silver halide grains in photographic emulsions include those with regular crystals such as cubes, octahedrons, and tetradecahedrons, those with irregular crystal shapes such as spherical and plate shapes, and those with twin planes. may have crystal defects, or a composite form thereof.

The grain size of the silver halide may be as fine as about 0.01 micron or less, or as large as a projected area diameter of up to 10 microns, or as a polydisperse emulsion, as described in U.S. Pat.
Monodisperse emulsions such as those described in No. 74.628, No. 3,655.394, and British Patent No. 1.413.7≠r may also be used.

Also, the asquito ratio is approximately! Tabular grains such as those described above can also be used in the present invention. Tabular grains are described in 'Photographic Science and Engineers' by Gatoff.
) 7” (Gutoff.

Photographic 5science and
Engineering), Volume 14L 2μ! ~2j7
Page (70 years): U.S. Patent Nos. μ, 3, λ,
Same ≠, ≠/4! , JlO, ≠, μ33.04tr, Dohiro, ≠32゜520 and British Patent No. 2. ///
It can be easily prepared by the method described in, for example, No. 2, No. 117.

The crystal structure may be --like, the inside and outside may have different halogen compositions, it may be a layered structure, or silver halides with different compositions may be joined by epitaxial bonding. Alternatively, it may be bonded with a compound other than silver halide, such as silver rhodium or lead oxide. Furthermore, two or more types of silver halide grains having different halogen compositions, crystal habits, grain sizes, etc. can also be used together.

Examples of halogenated photographic emulsions that can be used in the present invention include Research Disclosure (RD) A/m! (/ri71
(February), pp. 22-Jj, ``1. Emulsion production (Emul
sion preparation and types
)”, and the same &/17/l (/ri7ri//month),
It can be prepared using the method described in the tar page etc.

The silver halide emulsion used is usually one that has been subjected to physical ripening, chemical ripening, and spectral sensitization. Additives used in such processes are listed in Research Disclosure A17.
4≠3 and Dobian/17/l, and the relevant locations are summarized in the table below.

Known photographic additives that can be used in the present invention are also described in one of the above research disclosures, and the relevant descriptions are shown in the table below.

Additive type RD/7gu3 RD 7g7/a chemical sensitizer page 23 A4t page 1 right column sensitivity increasing agent
Same as above spectral sensitizer 23~. Page 217, page I, right column - supersensitizer B≠ right column, page 217 The silver halide grains mentioned above are those with a relatively low fog value, such as the light-sensitive material described in JP-A-61130. It is preferable to use silver halide grains of.

Next, the reducing agent used in the present invention will be explained.

The reducing agent that can be used in the light-sensitive material has the function of reducing the chemical compound and/or the function of promoting (but still suppressing) the polymerization of the polymerizable compound. There are various types of reducing agents having the above functions. The reducing agents include no-hydroquinones, catechols, p-aminephenols, p-phenylenediamines, 3-pyrazolidones, 3-aminopyrazoles, and ≠-amino! -Pyrazolones! -aminouranor tA, l/-
,! -Dihydroquine-A-aminopyrimidines, l/dactones, amylreductones, 0- or p-sulfonamidophenols, 〇-sweet taba p-sulfonamidonaphthols, co, ≠-disulfonamidophenols, -2, 4'-disulfonamide naphthols, o-4
or p-anruaminophenolumi, -2-sulfonamidoindanones, ≠-sulfonamides, pyrazolones, 3-sulfonamide indoles, sulfonamide pyrazolobenzimidazoles, sulfonamide pyrazolotriazoles , α-sulfonamide ketones, hydrazines, etc. By adjusting the type, amount, etc. of the reducing agent, it is possible to polymerize the polymerizable compound in either the area where the silver halide latent image is formed or the area where no latent image is formed. In a system in which a polymerizable compound is polymerized in a portion where a silver halide latent image is not formed, nophenyl-3-pyrazolidones, hydroquinones, and sulfonamidophenols are particularly preferred as reducing agents.

Regarding various reducing agents having the above-mentioned functions, please refer to JP-A No. 1, No. 1, No. 1, No. 1, No. 1, No. 1, No. 1, No. /-/I! ! 3j issue,
Each publication of 6/-λko 14114/No., and JP-A-4J-7C#36, same Otsuko ♂z3! μ No. 62-
4A3j! No., A, 2-20ts4to No., t2-
#tl101A/No., same Otsuko 10ri 4t37, same A
3-21 No. 4L1, Japanese Patent Publication No. 1999/-26763, Japanese Patent Application Sho & J-+2 J7747, JJ-, 29t77
No.j,%IjX平/-r 7 /7! No./-44
It is described in publications and specifications such as No. c10/, No. c10/20017, No. c10/20017. (Including those described as hydrazine derivatives or hydrazine derivatives) Also, regarding the above-mentioned reducing agents, see "'The Th
theory of the Photographic P
rocess' th edition, Kota/++-334 pages (12
1977), Research Disclosure Vol. 1. /7
0. 770th issue of the month of 7g (ri~/! page),
and the same magazine Vol. /76, 17th of December 76th
There is also a description in J Kou No. 3 (pages 22-3). In addition, like the photosensitive material described in JP-A-12-210≠Ko-6,
Instead of the reducing agent, a reducing agent precursor that can release the reducing agent under heating conditions or in contact with a base may be used. The reducing agents and reducing agent precursors described in each of the above-mentioned publications, specifications, and literature can also be effectively used in the photosensitive material used in this specification.

Therefore, the "reducing agent" in this specification includes the reducing agents and reducing agent precursors described in each of the above-mentioned publications, specifications, and literature.

Among these reducing agents, those having basicity that form salts with acids can be used in the form of salts with appropriate acids.

These reducing agents may be used alone, but as described in each of the above specifications, two or more types of reducing agents may be used in combination. When two or more types of reducing agents are used together, the interaction of the reducing agents is, first, to promote the reduction of silver halide (and/or organic silver salt) through so-called superadditivity; , silver halide (
The oxidized form of the first reducing agent produced by the reduction of the first reducing agent (and/or organic silver salt) causes the polymerization of the polymerizable compound (or suppresses the polymerization) through a redox reaction with other reducing agents coexisting. ), etc. are possible. However, in actual use, the reactions described above can occur simultaneously, so it is difficult to specify which effect is occurring.

Specific examples of the above reducing agent are shown below.

H3 H3 H3 H3 The amount of reducing agent added can vary widely, but is generally 0. /, /! 00 molti, preferably 10~
It is 300 molti.

Next, the polymerizable compound used in the present invention will be explained.

Polymerizable compounds used in photosensitive materials generally have addition polymerizability or ring-opening polymerizability. Examples of the compound having addition polymerizability include compounds having an ethylenically unsaturated group, and compounds having ring-opening polymerizability include compounds having an epoxy group, and compounds having an ethylenically unsaturated group are particularly preferred.

Compounds with ethylenically unsaturated groups that can be used in photosensitive materials include acrylic acid and its salts, acrylic esters, and acrylamide.

Methacrylic acid and its salts, methacrylic esters,
Examples include methacrylamides, maleic anhydride, maleic esters, itaconic esters, styrenes, vinyl ethers, vinyl esters, N-vinyl heterocycles, allyl ethers, allyl esters, and derivatives thereof.

Specific examples of polymerizable compounds that can be used in photosensitive materials include n-butyl acrylate, cyclohexyl acrylate, coethylhexyl acrylate, indyl acrylate, furfuryl acrylate, ethoxyethoxyethyl acrylate, and Cyclodecanyloxyacrylate, nonylphenyloxyethyl acrylate, l,3-dioxolane acrylate, hexanediol diacrylate, butanediol diacrylate, neopentyl glycol diacrylate, tricyclodecane dimethylol diacrylate, trimethylolpromine triacrylate, hantaerythritol tetraacrylate;
-/,/-dimethylethyl)-yo-hydroquinemethyl-! -ethyl-/, 3-dioxone acrylate, 1-
(2-hydroxo-/,/-dimethylethyl)-S,S
-dihydroquine methyl-/.

Examples include 3-dioxane triacrylate, trimethylolpro/2-propylene oxide adduct triacrylate, hydroxypolyether polyacrylate, polyester acrylate, and polyurethane acrylate.

Other specific examples of methacrylic acid esters include methyl methacrylate, butyl methacrylate, ethylene glycol dimethacrylate, butanediol dimethacrylate, neo-antyl glycol dimethacrylate, trimethylolpro/ξ-trimethacrylate,
Hammeerythritol trimethacrylate, pentaerythritol tetramethacrylate, polyoxyalkylenated bisphenol A dimethacrylate, and the like can be mentioned.

The above polymerizable compounds may be used alone or in combination of two or more. Regarding photosensitive materials using a combination of two or more types of polymerizable compounds, JP-A-2003-111011. There is a description in the February LJ issue. In addition, a substance in which a polymerizable functional group such as a vinyl group or a vinylidene group is introduced into the chemical structure of the above-mentioned reducing agent can also be used as a polymerizable compound. It goes without saying that the use of a substance that functions both as a reducing agent and a polymerizable compound as described above is also included in the embodiment of the photosensitive material.

Next, coloring materials (color image forming substances) that can be used in the present invention will be explained.

There are no particular restrictions on the color image-forming substance that can be used in the photosensitive material, and various types can be used. In other words, substances that themselves are colored (dyes and pigments), and substances that are colorless or light in color but are affected by external energy (heating, pressure, light irradiation, etc.) or other components (color developers). Substances that develop color upon contact (color formers) are also included in color image forming substances.
It will be done.

In addition to commercially available dyes and pigments, there are various literature sources (for example, "
"Dye Handbook" edited by the Organic Synthetic Chemistry Association, published in Showa≠J, Color Index (C, 1,) Handbook, "Latest Pigment Handbook" Japan Pigment Technology Association (published in 1977), [Latest Pigment Application Technology J CMC Publishing (/9rt yearly publication) and "Printing Ink Technology JCMC Publishing (19th yearly publication)" can be used.

The pigment that can be used in the present invention may be the above-mentioned naked pigment, or may be a pigment that has been subjected to a surface treatment. Surface treatment methods include surface coating with resin or wax;
Possible methods include attaching a surfactant and bonding a reactive substance (for example, a silane coupling agent, epoxy compound, polyincyanate, etc.) to the pigment surface, which are described in the following documents.

Properties and applications of metal soap (Saiwai Shobo) Printing ink technology (CMC Publishing, /ri, r+) Latest pigment application technology (CMC Publishing, /ritA) The particle size of the pigment that can be used in the present invention is 0.0/μ~1 after dispersion
Preferably it is in the 0μ range, 0.0! A range of −/μ is more preferable.

The amount of pigment is 5 to 120 parts by weight based on ioo parts by weight of the polymerizable compound.
It is preferably used in a ratio of 0 to 10 parts by weight, and more preferably in a ratio of 0 to 10 parts by weight.

As a method for dispersing the pigment into the polymerizable compound, known dispersion techniques used in ink production, toner production, etc. can be used. Dispersing machines include sand mills, attritor no.
Examples include a pressure kneader and the like. Details are described in "Latest Pigment Application Technology" (CMC Publishing, li♂t).

On the other hand, examples of substances that develop color due to some kind of energy such as heating, pressure, or light irradiation include thermochromic compounds,
Piezochromic compounds, photochromic compounds, and leuco compounds such as triarylmethane dyes, quinone dyes, indigoid dyes, and azine dyes are known. All of these develop color upon heating, pressurization, light irradiation, or air oxidation.

Examples of substances that develop color when they come into contact with another component include systems that develop color due to acid-base reactions, redox reactions, coupling reactions, chelate formation reactions, etc. between two or more components. .

For example, "Introduction to the chemistry of special paper" by Hiroyuki Moriga (Showa!
Pressure-sensitive copying paper (pages 2 to 3) listed in
, azography (pages R7-3), heat-sensitive coloring by chemical change (ttr, pg.IcoO), and other well-known coloring systems, or the seminar sponsored by the Kinki Chemical Industry Association ``Latest dye chemistry - as functional dyes''. It is possible to use the coloring system described in "Attractive Utilization and New Developments of Coloring Systems", pages 26-31 of the proceedings (dated January 1910). Specifically, a coloring system consisting of a coloring agent with a partial structure such as lactone, lactam, or spiropyran, which is used in pressure-sensitive paper, and an acidic substance (coloring agent) such as acid clay or phenols: an aromatic diazonium salt or Systems using azo coupling reactions of diazotate, diazosulfonates, naphthols, anilines, active methylenes, etc.: Reactions of hexamethylenetetramine with ferric ions and gallic acid, and reactions of phenolphthalein with complexranes. Chelate-forming reactions such as reactions with alkaline earth metal ions; redox reactions such as reactions between ferric stearate and pyrogallol and reactions between silver behenate and Hiro-methoxy-1-naphthol can be used.

The color image forming substance is O8! based on 100 parts by weight of the polymerizable compound. It is preferable to use it in a proportion of 30 parts by weight.
More preferably, it is used in a proportion of 2 to 30 parts by weight. Further, when a color developer is used, it is preferably used in a proportion of about 0.3 to 10 parts by weight per 1 part by weight of the color former.

In the light-sensitive material of the present invention, the polymerizable compound, silver halide, reducing agent, and coloring material are contained in microcapsules. In order to uniformly contain silver halide in the microcapsules, it is preferable that a copolymer consisting of a hydrophilic repeating unit and a hydrophobic repeating unit be dissolved in the polymerizable compound. For details, please refer to
λ-aoyuro publication and JP-A-43-2r7r4
There is a description in the t≠ publication.

Regarding microcapsules, various known techniques can be applied without particular limitation. For example, U.S. Patent No. 2100 Hiroshi! Methods utilizing coacervation of hydrophilic wall forming materials described in the specifications of US Pat. /the law of nature! 7
Interfacial polymerization method described in French Patent No. 2-14 and Patent No. 2-77/; U.S. Patent No. 3 1tszo and 1dlJttOJO4 Method by polymer precipitation described in each specification: U.S. Patent Method using the isocyanate-polyol wall material described in U.S. Pat. No. 372/≠, 1//; U.S. Pat. No. 737 and No. ≠ oryro 2. Method using a urea-formaldehyde-based or urea-formaldehyde-resircinol-based wall forming material: US Patent No. ≠ Okoj! 1. ! ! A method using wall-forming materials such as melamine-formaldehyde resin and hydroxypropyl cellulose described in the specifications of the Japanese Patent Publication No. 1993/At No. In-situ method by polymerization of monomers described in L-TA 07 publication; British Patent No. 7
No. 107 and the same issue! Examples include the polymerization dispersion cooling method described in each Mei Publication No. 07 Hiroshi: the spray drying method described in the specifications of US Patent No. 3111≠07 and British Patent No. 304t22. Although the method for microcapsulating oil droplets of a polymerizable compound is not limited to the above, a method in which a core substance is emulsified and then a polymer film is formed as a microcapsule wall is particularly preferred. In addition, regarding photosensitive materials using microphone cells having an outer shell made of polyamide resin and/or polyester resin, %llJ昭子j-,! Regarding photosensitive materials using microcapsules having an outer shell made of polyurea resin and /'' or polyurethane resin, see Japanese Patent Application Laid-open No. 01-20917-31. Regarding photosensitive materials using microcapsules having
No. 62-20FIII describes a photosensitive material using microcapsules having an outer shell made of gelatin.
No. AO describes a photosensitive material using microcapsules having an outer shell made of epoxy resin.
, No. 707111 describes a photosensitive material using a microcapsule having a composite resin outer shell containing a polyamide resin and a polyurea resin.
JP-A No. 2-2091-1 describes a photosensitive material using microcapsules having a composite resin shell containing polyurethane resin and polyester resin.

...Silver halogenide is preferably present in the wall material constituting the outer shell of the microcapsule. A photosensitive material containing silver halide in the wall material of microcapsules is described in JP-A-62-/Al-Hiro-7.

Furthermore, in order to obtain capsules with particularly excellent wall density, Japanese Patent Application No. Hei/J77r2 discloses that a reaction product of a water-soluble polymer having several sulfine groups and a polymerizable compound having an ethylenically unsaturated group is used. A microcapsule is disclosed in which a polymer wall of a bulky compound is provided around a membrane,
It is preferably used in the present invention.

The light-sensitive material of the present invention may further contain a base or a base precursor as an image formation accelerator.

As the base and base precursor that can be used in the photographic material of the present invention, inorganic bases and organic bases, or their base precursors (decarboxylation type, thermal decomposition type, reaction type, complex salt forming type, etc.) can be used.

A preferred base precursor is JP-A-Sho! Tar 1r
oz≠ri issue, same! Ta/♂O! No. 37, same! tarri 5
No. 237, A/-j Kob No., A/-3t7413
No., A/-4//eO, A/-42t31, I! l/-42t3F, 4/-63t37, same,
4/-431,34, 4/-63t3J-, 4/-43tJr, 4/-63t37, 4/-
43tJr, 4/-63t37, A/-j3t
ltO issue, same tl-! ! t4tl1, same t/-Jjr
tll-! No. 4/-1j4444, t/-11
No. 0, No. t/-10724LO, No. &/-2/Tata jO, No. &/-231IuO, No. J/-1jjji
Decomposition by heating as described in Bei, 7/-3/3≠31, t3-3167μθ, 44-11' 7≠6, and Japanese Patent Application Sho-Otsu Koko-Ori/31. Salts of organic acids and bases that carbonate, also published by Tokukai Sho! tar/j7&7
No. 7, tr-itt5PtJ, t3-taz/! Examples include compounds that eliminate bases upon heating as described in the official gazette.

The base precursor of the present invention preferably releases a base at ro 0c to xoo 0c;
It is more preferable to emit at c to lro 0c.

When using a base or base precursor in a photosensitive material,
A base or base precursor may be present outside the microcapsule.

As a method for incorporating a base or a base precursor into the outside of a microcapsule, Japanese Patent Application Laid-open No. 521/1999,
2-209! λλ issue, same t2-209, λ issue, same &3
-1!4137 No. 3-27YIA3, t2-
209!23, z2-2jt3/IAO, 4j
-32! lL1. are stated in the public notice.

The base or base precursor can be used in the photosensitive material in a wide range of amounts. The base or base precursor is suitably used in an amount of 100% by weight or less, more preferably 0.1% by weight of the coating film of the photosensitive layer.
A range of .mu..theta. to .mu..theta.wt% is useful. In the present invention, the base and/or base precursor may be used alone or as a mixture of two or more.

The base or base precursor may also be contained in photosensitive microcapsules. A method for incorporating a base precursor into a capsule is described in JP-A-4'-322!
It may be introduced in the form of direct solid dispersion in a polymerizable compound as described in Japanese Patent Application Publication No. 1999/-2t3t4L/. No. and patent application/-/AO/≠
! As described in the specification of this issue, the base precursor may be introduced into the polymerizable compound in the form of an emulsification while being dispersed in water.

Specific examples of these bases and base precursors are shown below, but the invention is not limited to these.

CH2 J-12 H H 1'12 Binders that can be used in the photosensitive material can be contained in the photosensitive layer alone or in combination. It is preferable to use a mainly hydrophilic binder. Hydrophilic binders are typically transparent or translucent, such as natural substances such as gelatin, gelatin derivatives, cellulose derivatives, starch, gum arabic, polyvinyl alcohol, polyvinylpyrrolidone, acrylamide polymers, etc. synthetic polymeric materials such as water-soluble polyvinyl compounds.

Other synthetic polymeric substances include dispersed vinyl compounds in the form of latexes, which increase the dimensional stability of photographic materials, among others. Regarding photosensitive materials using binders, see Japanese Patent Application Laid-Open No. 1983-λO! ,! There is a description in the yo issue bulletin.

In the present invention, an organic metal salt can also be used as an oxidizing agent together with photosensitive silver halide.

Among such organic metal salts, organic silver salts are particularly preferably used.

Examples of organic compounds that can be used to form the above-mentioned organic silver salt oxidizing agent include benzioazoles, fat dispersions, and other compounds described in U.S. Pat. There is. Also, JP-A-40-113236
A silver salt of a carbonic acid having an alkynyl group such as silver phenylzolopiolate described in Japanese Patent Application Publication No. 2003-100002
Also useful are the acetylene silvers described in the publications No. 0IAa and tlA-172-4. Two or more organic silver salts may be used in combination.

The above-mentioned organic silver salts can be used together in an amount of 0.02 to 10 mol, preferably 0.0 to 1 mol, per 1 mol of photosensitive silver halide. The total coating amount of photosensitive silver halide and organic silver salt is /mg to /O in terms of silver.
g/m2 is suitable.

The anti-smudge agent used in the photosensitive material is preferably a particulate material that is solid at room temperature. As a specific example, British Patent No. 1
Starch particles described in KojjJ4'7 specification, US Patent No. 3t, polymer fine powder described in No. 2j73A Specification 1, etc., British Patent No. 1 Ko3! Microcapsule particles containing no coloring agent as described in the Tata/No. specification etc., US Pat. No. 2,711,376
cellulose fine powder, talc, kaolin,
Examples include inorganic particles such as bentonite, waxite, zinc oxide, titanium oxide, and alumina. The average particle size of the above particles is 3 to 50 μm in volume average diameter.
Preferably, the range is ! A range of 402 m to 402 m is more preferable. As mentioned above, when the oil droplets of the polymerizable compound are in the form of microcapsules, it is more effective if the particles are larger than the microcapsules.

Various image formation accelerators can be used in the photosensitive material.

Image formation accelerators have functions such as ■ promoting the movement of bases or base precursors, promoting the reaction between reducing agents and silver salts, and promoting immobilization of dye-donating substances through polymerization. are classified into the aforementioned bases or base precursors, nucleophilic compounds, oils, heat solvents, surfactants, compounds that interact with silver or silver salts, compounds that have an oxygen scavenging function, and the like. However, these substance groups generally have multiple functions and usually have some of the above-mentioned promoting effects. For more information on these, see U.S. Pat.
1. There are descriptions in publications and specifications such as t7Ir, 73ri whistle 3 J' to l O column, and JP-A No. 209≠Ko 3.

In photosensitive materials, in systems that polymerize polymerizable compounds in areas where latent images of silver halide are not formed, the purpose is to initiate polymerization or to polymerize unpolymerized polymerizable compounds after image transfer. A thermal or photopolymerization initiator can be used.

Examples of thermal polymerization initiators include azo compounds, organic peroxides,
Examples include inorganic peroxides and sulfinic acids. Details of these are described in pages 2 to 1 of ``Addition Polymerization/Ring-Opening Polymerization'' (2011, Kyoritsu Shuppan) published by the Society of Polymer Science and Technology, Kobunshi Jikkengaku Editorial Committee Kinsen, and the like.

Examples of photopolymerization initiators include benzophenones, acetophenones, benzoins, thioxannones, and the like. Details of these are described in "Ultraviolet Curing System" (2010, General Technology Center), pages 63 to 147, etc.

Various surfactants can be used in photosensitive materials for the purposes of coating aids, improving peelability, improving slipperiness, preventing electrification, promoting development, and the like. Specific examples of surfactants are given in Japanese Patent Application Laid-Open No. 2003-101012.
7J≠63, same t call lt3μ! It is stated in No. 7 etc.

An antistatic agent can be used in the photosensitive material for the purpose of preventing static electricity.

As an antistatic agent, it is described in Research Disclosure Magazine, Vol.

A dye or pigment may be added to the photosensitive layer of the photosensitive material for the purpose of preventing halation or irradiation. JP-A-3-227≠1 describes a photosensitive material in which a white pigment is added to the photosensitive layer.

When the photosensitive layer of the photosensitive material uses the above-mentioned microcapsules, the microcapsules may contain a dye that can be decolored by heating or light irradiation. The dye having the property of being decolored by heating or light irradiation can function as a yellow filter in conventional silver salt photography.

Regarding photosensitive materials using dyes that have the property of decolorizing by heating or light irradiation as mentioned above, Japanese Patent Application Laid-Open No. 63-2
There is a description in Publication No. 7≠RI No. 40.

When a solvent for a polymerizable compound is used in a photosensitive material, it is preferable to encapsulate it in a microcapsule separate from the microcapsule containing the polymerizable compound. Regarding photosensitive materials using organic solvents that are miscible with polymerizable compounds encapsulated in microcapsules, please refer to Japanese Patent Application Laid-open No.
There is a description in Publication No. 2μ. A water-soluble vinyl polymer may be adsorbed onto the silver halide grains described above. As mentioned above, regarding photosensitive materials using water-soluble vinyl polymers, JP-A-62-T/L! There is a description in R2 publication.

In addition to those mentioned above, examples of optional components that can be included in the photosensitive layer and how they are used can also be found in the application specifications for the series of photosensitive materials mentioned above, and in Research Disclosure magazine VOI, /70, /71. There is a description in issue No. 17029 (pages ri-lyo) of June 2017.

Layers that can be optionally provided on the photosensitive material include an image-receiving layer, a heating layer, an antistatic layer, an anti-curl layer, a release layer,
Examples include a cover sheet, a protective layer, an antihalation layer (colored layer), and the like.

Instead of using an image-receiving material as a method of using the photosensitive material, the above image-receiving layer may be provided on the photosensitive material and an image may be formed on this layer. The image-receiving layer provided on the photosensitive material can have the same structure as the image-receiving layer provided on the image-receiving material.

For photosensitive materials using a heat generating layer, see JP-A No. 27IAI/, 3μ, and for photosensitive materials provided with a cover sheet or protective layer, see JP-A No. 2-,! 1
No. 0411A7 discloses a photosensitive material provided with a colored layer as an anti-harrayon layer in JP-A-Sho/, 3-10/l.
Each of these is described in Publication No. ll1. Furthermore, examples of other auxiliary layers and their usage are also described in the applications relating to the above-mentioned series of light-sensitive materials.

Various antifoggants or photographic stabilizers can be used in the present invention. An example is RD/7
AII3 (/ri 7 years) 2μ~! ! azoles and azaindenes as described in JP-A No. 2003-13, nitrogen-containing carboxylic acids and phosphoric acids as described in JP-A No. 2, or mercapto compounds and phosphoric acids as described in JP-A No. 13. The metal salt, JP-A-Sho z2-♂7ri! Acetylene compounds described in Publication No. 7 can be used.

For photosensitive materials, there are various processing temperatures and processing times during development.
Various development stoppers can be used for the purpose of always obtaining a constant image.

The development stopper referred to here is a compound that neutralizes the base or reacts with the base to reduce the base concentration in the film and stop development, or a compound that interacts with silver or silver salt to stop development. It is a compound that suppresses

Specifically, an electrophilic compound that causes a substitution reaction with a coexisting base when heated, an acid precursor 1 that releases an acid when heated;
Alternatively, nitrogen-containing heterocyclic compounds, mercapto compounds and their precursors may be mentioned.

For more details, see Tokukai Aki Otoko, 2nd 3rd/! Ri issue (3/) ~
(32) page, Patent Application Hei/-7, 2≠77, Patent Application Hei/-3 Hiroshi 7
It is stated in the No. No. Publication etc.

The photosensitive material of the present invention is used to form an image according to the usage method described below, and an image-receiving material is generally used.

Next, we will explain about the image-receiving fee. Image-receiving materials generally have an image-receiving layer provided on a support. However, when a polymer image is formed on an image-receiving material, when a dye or a pigment is used as a color image-forming substance, the image-receiving material may be composed only of the above-mentioned support. As a support for the image-receiving fee,
There are no particular restrictions, but glass, paper, high-quality paper, Paraita finish,
coated paper, cast coated paper, synthetic paper, metals and their analogues, films such as polyester, polyethylene, polypropylene, acetyl cellulose, cellulose ester, polyvinyl acetal, polystyrene, polycarbonate, polyethylene terephthalate, and resin materials and polymers such as polyethylene. Examples include laminated paper.

When a porous material such as paper is used as the support for the image-receiving material, it is preferable that the support has a certain level of smoothness, as in the image-receiving material described in JP-A No. 209530/1983. Furthermore, an image-receiving material using a transparent support is described in JP-A-2-20-33/1999.

The image-receiving layer of the image-receiving material is composed of a white pigment, a binder, and other additives, and it is thought that the white pigment itself or the voids between the particles of the white pigment receive the polymerizable compound.

Examples of inorganic white pigments used in the image-receiving layer include oxides such as silicon oxide, titanium oxide, zinc oxide, magnesium oxide, and aluminum oxide, magnesium sulfate, barium sulfate, calcium sulfate, and magnesium carbonate. barium carbonate, calcium carbonate, calcium silicate, magnesium hydroxide, magnesium phosphate,
Other examples include alkaline earth metal salts such as magnesium hydrogen phosphate, aluminum silicate, aluminum hydroxide, zinc sulfide, various sugar clays, talc, kaolin, zeolite, acid clay, activated clay, and glass.

Examples of the organic white pigment include polyethylene, polystyrene, benzoguanamine resin, urea-formalin resin, melamine-formalin resin, polyamide resin, and the like. These white pigments may be used alone or in combination, but those with high oil absorption for polymerizable compounds are preferred.

In addition, as the binder used in the image-receiving layer of the present invention, water-soluble polymers, polymer latex, polymers soluble in organic solvents, etc. are used.
For example, cellulose derivatives such as carboxin methylcellulose, hydroxyethylcellulose, and methylcellulose, gelatin, heptatalated gelatin, casein, proteins such as ovalbumin, dextrin, starches such as etherified starch, polyvinyl alcohol, polyvinyl alcohol partial acetal, and polyvinyl alcohol. Synthetic polymers such as -N-vinylpyrrolidone, polyacrylic acid, polymethacrylic acid, poly(7)acrylamide, polyvinylimidazole, polyvinylpyrazole, polystyrene sulfonic acid, etc.
Examples include locust bean gum, pullulan, gum arabic, and sodium alginate.

Examples of the polymer latex include styrene-butadiene copolymer latex, methyl methacrylate-butadiene copolymer latex, acrylic ester and/or methacrylic ester polymer, or copolymer latex/ethylene/vinyl acetate copolymer latex. etc. are enumerated.

Examples of polymers soluble in organic solvents include polyester resins, polyurethane resins, polyvinyl chloride resins, polyacrylonitrile resins, and the like.

As for how to use the above binders, two or more types can be used in combination, and further, the two types of binders can also be used in combination in such a ratio that phase separation occurs. An example of such usage is described in Japanese Patent Application No. 2-3134TL'3.

The average particle size of the white pigment is 0, / -, 20μ,
Preferably 0. /~ioμ, coating amount is 017g~
60g, preferably in the range of 0.6g to 30g.

The weight ratio of the white pigment to the binder is preferably in the range of 0.0/~0.4 t of binder per 1 of pigment, and 0.03~0.4 t of binder.
A range of 0.3 is more preferred.

In addition to the binder and the white pigment, the image-receiving layer can contain various additives as described below.

For example, in the case of using a color-forming synutem consisting of a color-forming agent and a color-developing agent, the color-developing agent can be included in the image-receiving layer. Typical color developers include phenols, organic acids, their salts, and esters, but when a dye is used as a color image forming substance, zinc salts of salicylic acid derivatives are preferred. , among others, 3. ! -G α-
Zinc methylbenzylsalicylate is preferred.

The above color developer is applied to the image-receiving layer at a concentration of 0. It is preferable that the coating amount is in the range of / to 50g7m2.

More preferably O0! The range is from 20g/m2 to 20g/m2.

The image-receiving layer may contain a thermoplastic compound. When the image-receiving layer contains a thermoplastic compound, it is preferable that the image-receiving layer itself is constituted as an aggregate of thermoplastic compound fine particles. The image-receiving layer having the above structure has the advantage that it is easy to form a transferred image, and that a glossy image can be obtained by heating after image formation. The above thermoplastic compound is not particularly limited and can be arbitrarily selected from known plastic resins (plastics), waxes, and the like. However, the glass transition point of the thermoplastic resin and the melting point of the wax are preferably λoo 0c or less. Regarding the image-receiving material having an image-receiving layer containing thermoplastic compound fine particles as described above, Japanese Patent Application Laid-Open No. 2-21'
There is a description in No. 0071 and Publication No. 12-1073.

The image-receiving layer may contain a photopolymerization initiator or a thermal polymerization initiator. In image formation using an image receiving material,
The color image-forming material is transferred along with the unpolymerized polymerizable compound. Therefore, a photopolymerization initiator or a thermal polymerization initiator can be added to the image-receiving layer for the purpose of smoothly proceeding with the curing process (fixing process) of the unpolymerized polymerizable compound. In addition,
Regarding an image receiving material having an image receiving layer containing a photopolymerization initiator, see JP-A No. 6 Co/ll/≠, and regarding an image receiving material having an image receiving layer containing a thermal polymerization initiator, see JP-A No. 2-21.
Each is described in the 0414L≠ publication.

The method of using the photosensitive material will be described below.

The photosensitive material can be used simultaneously with imagewise exposure or after imagewise exposure.
Perform development processing and use.

Although various exposure means can be used as the above-mentioned exposure method, a latent image of silver halide is generally obtained by imagewise exposure to radiation including visible light. The type of light source and amount of exposure
Silver halide photosensitive wavelength (if dye aggravation is performed,
It can be selected depending on the sensitized wavelength) and sensitivity. Further, the original image may be a black and white image or a color image.

The photosensitive material is developed at the same time as the imagewise exposure or after the imagewise exposure. As the heating method, various conventionally known methods can be used. Also, JP-A-62-2
As in the image forming method described in Japanese Patent No. 10461, heat development may be performed while suppressing the amount of oxygen present in the photosensitive layer. The heating temperature is generally 100℃ to 200℃,
Preferably it is 120°C to 180°C. The heating time is generally 0.1 seconds or more, preferably 0.2 seconds to 1 second.
0 seconds, more preferably 0.5 seconds to 3 seconds.

The photosensitive material is subjected to a heat development process as described above, and if necessary, is then irradiated with light to remove the polymerizable compound in the area where a silver halide latent image is formed or the area where a silver halide latent image is not formed. can be polymerized.

In this way, by pressing the photosensitive material with which a polymer image was obtained on the photosensitive layer and the image-receiving material in a superimposed state, the unpolymerized polymerizable compound is transferred to the image-receiving material and the polymer image is formed on the image-receiving material. Color images can be obtained.

As the above-mentioned pressurizing method, a conventionally known method can be used.

For example, the photosensitive material and the image-receiving material may be sandwiched between press plates such as a presser, or pressure may be applied while conveying using a pressure roller such as a two-knob roll. Pressure may be applied intermittently using a dot impact device or the like.

Alternatively, highly pressurized air can be blown with an air gun or the like, or the pressure can be applied with an ultrasonic generator, a piezoelectric element, or the like.

Furthermore, pressure transfer under heating can also be performed.

Photosensitive materials include materials for color manipulation and printing, printing photosensitive materials, computer graphics hard copy materials,
It has many uses, such as photosensitive materials for copying machines.

"Examples" The present invention will be explained in more detail with the following Examples, but the present invention is not limited thereto.

Example-1 and Comparative Example-1 After extruding polyethylene terephthalate by a conventional method, the thin film stretched in the vertical and horizontal directions was heated and fixed at various temperatures from 200°C to 270°C to form the film W. A -25μ polyethylene terephthalate film was made. Aluminum was then vacuum deposited over one side of these films. Regarding these films and several types of commercially available aluminized polyethylene terephthalate, JI
The heating expansion/contraction rate was measured by a method similar to that described in No. 302,318.

First, five specimens each having a width of about 20 m5 and a length of about 150 Ill11 were taken in the vertical and horizontal directions, and a gage was placed at the center of each specimen at a distance of about 100 mm. Next, the test piece was suspended in a constant temperature box maintained at a temperature of 150°C ± 3°C, heated for 2 hours, taken out, and returned to room temperature for 30 minutes.
After standing for a minute, the gauge distance was measured and calculated using the following formula, and the average value was determined. In addition, in the above method, the temperature is the maximum temperature received during thermal development, and is 120°C to 18°C.
The temperature shall be within the range of 0°C. In this example, since thermal development was performed at 150°C, measurement was performed at 150°C.

(Two) L, -L.

Heating expansion/contraction rate (%'I - , C, D, and E, F, G, and H, which were out of the range of heating expansion and contraction ratios, were used in the following experiment.

In addition, if the supports A, B, C, and D are not subjected to aluminum vapor deposition, 1. J, N, and L were also used to perform the following experiments.

Halon (EB-1 gelatin aqueous solution (add 16 g of gelatin and 0.5 g of sodium chloride to 1500 ml of water, and purge with IN sulfuric acid.
300 ml of an aqueous solution containing 1 g of potassium bromide and an aqueous silver nitrate solution (100 g of silver nitrate dissolved in 300 ml of water) were simultaneously added at equal flow rates over 50 minutes. . One minute after this addition was completed, 430 m of sensitizing dye (SB 1) was added.
15 minutes after addition, 2.g of potassium iodide was added.
100 ml of an aqueous solution containing 9 g and a silver nitrate aqueous solution (water 1
(3 g of silver nitrate dissolved in 00 ml) was added at an equal flow rate over 5 minutes. To this emulsion, 1.2 g of poly(isobutylene-monosodium co-maleate) was added and precipitated, washed with water and desalted, 4 g of gelatin was added and melted, and 0.5+ng of sodium thiosulfate was added.
In addition, chemical sensitization was carried out at 50 DEG C. for 15 minutes to prepare 460 g of a monodisperse dodecahedral silver iodobromide emulsion (EB-1) having an average grain size of 0.22 .mu.m and a coefficient of variation of 20%.

Halogen EG- gelatin aqueous solution (add 20 g of gelatin and 0.5 g of sodium chloride to 1,600 ml of water, and purge it with IN sulfuric acid.
200 ml of an aqueous solution containing 71 g of potassium bromide and a silver nitrate aqueous solution (100 g of silver nitrate dissolved in 200 ml of water).
were simultaneously added at equal flow rates over 30 minutes. One minute after this addition was completed, the sensitizing dye (SG-1) 48
10 minutes after addition of the sensitizing dye, 100 ml of an aqueous solution containing 2.9 g of potassium iodide and an aqueous silver nitrate solution (3 g of silver nitrate dissolved in 100 ml of water) were simultaneously added over 5 minutes. This emulsion contains poly (
Isobutylene-comaleate monosodium) 1.
After adding 2g of gelatin and desalting it by sedimentation and washing with water, 4.5g of gelatin was added and dissolved, and 0% of sodium thiosulfate was added.
．． 7mg was added and chemically sensitized at 60°C for 15 minutes to obtain monodisperse 14 with an average particle size of 0.12μm and a coefficient of variation of 21%.
460 g of a hedral silver iodobromide emulsion (EC-1) was prepared.

Halon (ER-1) gelatin aqueous solution (add 20 g of gelatin and 0.5 g of sodium chloride in 1600 ml of water, adjust the pH to 3 with IN sulfuric acid,
Aqueous solution 200-1 containing 71 g of potassium bromide and silver nitrate aqueous solution (100 g of #I silver nitrate dissolved in 200 ml of water) were simultaneously added at equal flow rates for 30 minutes to Added with. One minute after this addition was completed, the sensitizing dye (SR-1) was added, and 15 minutes after the addition of the sensitizing dye, 3.65 g of potassium iodide was added.
100 μl of an aqueous solution containing silver nitrate (100 μl of water)
(0.022 g of silver nitrate dissolved in m1) was added at a constant flow rate over 5 minutes. Add 1.2 g of poly(isobutylene-monosodium co-maleate) to this emulsion.
In addition, after settling, washing with water, and desalting, gelatin 3
．． Add and dissolve 5g of sodium thiosulfate, and add 0.5g of sodium thiosulfate.
45+g was added and chemically sensitized at 55°C for 20 minutes to obtain a monodisperse 14 with an average particle size of 0°13 μm and a coefficient of variation of 24%.
460 g of a hedral silver iodobromide emulsion (ER-1) was prepared.

Sensitizing dye (SB-1) Sensitizing dye (SG-1) Sensitizing dye (SR Add 200 ml of glass beads with a diameter of 0.5 to 0751 and mix at 3000 r, p, m using a dyno mill for 30 min.
A solid dispersion with a particle size of 1.0 μm or less (KB-
1) was obtained.

／ ／ ／ ／ ゝ〉／”＞ Toso “＼＼ ＼＼-ノ′ (GY-1) 255 g of polymerizable compound (MN-2), 45 g of Microlith Yellow 40A (trade name, manufactured by Chiha Geigy) were mixed and stirred at 80°C for 90 minutes to obtain a dispersion (GY~1).

1 straw 11-suke 131 seco-, -(-niko, M
45 g of Microrethread 3RA (trade name, manufactured by Chiha Geigy) was mixed with the mixture and stirred at 80° C. for 90 minutes to obtain a dispersion (CM-1).

255 g of the polymerizable compound (MN-2) of (GC-1) was mixed with 45 g of Microlith Blue 40A (trade name, manufactured by Chiha Geigy) and stirred at 80°C for 90 minutes to obtain a dispersion (QC-11). .

Copolymer (IP-1) was added to 45 g of pigment dispersion (GY-1) of (PB-1).
) of (SV-1) 20% (wt%) solution, 9 g, (RD
-1) 2.3g, (RD-2) 6.2g, (FF-3)
(SV-1) 0.5% (wt%) solution and 5 g of stearyl alcohol were added and dissolved to prepare an oily solution.

Add 3.8 g of silver halide emulsion (EB-1) to this solution,
24 g of solid dispersion (KB-1) was added, and stirred for 5 minutes at 15,000 revolutions per minute using a homogenizer while keeping the temperature at 60°C.
B-1) was obtained.

Copolymer (IP-1) was added to 45 g of PC-pigment dispersion (GM-1).
) ノ(SV-1) 9g of 20% (wt%) solution, (
RD-1) 2.3g, (RD-2) 3.1g, (FF
-3) (SV~1) 1 g of 0.5% (wt%) solution and 5 g of stearyl alcohol were added and dissolved to prepare an oily solution.

Add 3.8 g of silver halide emulsion (EC-1) to this solution,
24 g of solid dispersion (KB-1) was added, and stirred for 5 minutes at 15,000 revolutions per minute using a homogenizer while keeping the temperature at 60°C.
C-1) was obtained.

A copolymer (IP
-1) of (SV-1) 20% (wt%)
9g of liquid, (RD-1) 2.3g, (RD-2)
6, 2g, (FF 3) (7) (SV 1) 0
．． 1 g of a 5% (wt%) solution and 5 g of stearyl alcohol were added and dissolved to prepare an oily solution.

Add 3.8 g of silver halide emulsion (ER-1) to this solution,
24 g of solid dispersion (KB-1) was added, and stirred for 5 minutes at 15,000 revolutions per minute using a homogenizer while keeping the temperature at 60°C.
R-1) was obtained.

Polymerizable compound (MN-2) Product name: Kayarad R684 (manufactured by Nippon Kayaku Co., Ltd.) Copolymer (IP CR3 CH3 ICH2-C) 83 ICH2, 7 CO2CH2CH=CH2 CO□H (SV CHz-C1l- CHzOCL H (RD (RD (FF) 4 g of a 15% aqueous solution of polymer (2P-1) and 46 g of water were mixed, and the pH was adjusted to 5.0 using a 10% aqueous solution of sulfuric acid. 10% aqueous solution 50
g and mixed for 30 minutes at 60°C. The above photosensitive composition (PB-1) was added to this mixed solution, and stirred at 60°C and 5000 rpm for 20 minutes using a daysilver.
An emulsion in the form of a W10/W emulsion was obtained.

Separately, 20 g of a 37% formaldehyde aqueous solution and 76.3 g of water were added to 14.8 g of melamine, heated to 60°C, and stirred for 40 minutes to obtain a transparent aqueous solution of melamine/formaldehyde initial condensate.

Add 25g of this initial fastener to the above W10/W emulsion 1.
49g and pH 5.0 using a 10% aqueous solution of sulfuric acid.
Adjusted to. This was then heated to 60°C and stirred for 60 minutes. Add 1 g of 40% aqueous solution of urea to this, p
H was adjusted to 3.5 and stirred for an additional 40 minutes at 60°C. After cooling, p
A photosensitive microcapsule dispersion (adjusted to H6.5, with melamine/formaldehyde resin as the capsule wall)
CB-1) was adjusted.

In the preparation of photosensitive microcapsule dispersion (CB-1) (7) of microcapsules CG-1), photosensitive composition (PC-1) was used instead of photosensitive composition (PB-1). Except for the above, a photosensitive microcapsule dispersion (CG-1>) was prepared in the same manner.

Microcapsule CR-'s ■ Since the photosensitive composition (PR-1) was used instead of the photosensitive composition (PB-1) in the preparation of the photosensitive microcapsule dispersion (CB-1), A photosensitive microcapsule dispersion (CR1) was prepared in the same manner.

Polymer (2P-1) Polyvinylhenzenesulfinate potassium polymer (2
P-2) -90 to polyvinylpyrrolidone (manufactured by Wako Pure Chemical Industries, Ltd.)! Optical material■Sakukai photosensitive microcapsule dispersion (CB-1) 16.7g
, (CG-1) 16.7 g, (CR-1) 16.7 g mixed solution, surfactant (WW-1) 5% aqueous solution 7.1 g
, 8.8 g of a 1% aqueous solution of (WW-2), and PVA2
05 (manufactured by Kuraray) was added and mixed well. This solution was applied in an amount of 6 coats to each of the aluminum-deposited polyethylene terephthalate supports A-H.
A photosensitive material was obtained by coating at 8 cc/m2 and drying.

(WW (WW-2) CHzCOOCHz-C8(Czlb)CaHqNaO
zS-C)tcOOcL-CB (C2)Is) C,
lI.

[Creation of image-receiving material (R3-3)] Calcium carbonate (Callite SA, Shiroishi Central Research Fracture)
240g, surfactant (Boys 520, manufactured by Kao Corporation)
5.6 g and 354.4 g of water were stirred and mixed, and a dispersion machine (product name: Ultra Disperser (LK-41 type),
(manufactured by Yamato Scientific) for 3 minutes at 8000 revolutions per minute. 52 g of this dispersion, 4 g of a 1% aqueous solution of (WW-2), and polyvinyl alcohol (PVA-117,
A coating solution for forming an image-receiving layer was prepared by mixing 52 g of a 10% aqueous solution (manufactured by Kuraray Co., Ltd.) and adding water to make a total amount of 130 g.

This coating solution was applied to a paper support (J I 5) weighing 80 g/m2.
-24 as the fiber length distribution defined by P-8207
A paper support using a base paper having a fiber length distribution such that the sum of the weight percent of the menenyu residue and the weight percent of the 42 menyu residue is 30 to 60% (see JP-A-63-186239). An image receiving material (R5-3) was prepared by uniformly coating the film at 65 g/II+'' and drying at 60°C.

After exposing the photosensitive material using a tungsten light bulb through a step wedge at a color temperature of 4800K, 20001ux, and 1 second exposure, the support side of the photosensitive material was exposed to light at a surface temperature of 150°C. It was brought into contact with a heating plate for 2 seconds to carry out thermal development. Next, the photosensitive material is overlapped with an image-receiving material (R3-3),
In this state, it was passed through a pressure roller of 1000 kg/cw''.

Then, the image receiving material was peeled off from the photosensitive material.

Color unevenness was measured in the density portion of the obtained image. The color unevenness is 20 each! By measuring the concentration at points separated by Ill, 2I, and 0.2-Tsuru, the dispersion in concentration was read and evaluated.

Table 1 shows the evaluation of relative color unevenness when using supports A-L. Those with little color unevenness were marked with "○", and those with a lot of color unevenness were marked with "x".

/ Procedural amendment 1゜ Display of incidents 1990 Patent Application No. 334 No. 784 λ name of invention Photosensitive materials for heat development 3゜ person who makes corrections Relationship with the incident

Claims (1)

[Claims] The thickness is 75μ or less, and the heating expansion and contraction ratio measured in the temperature range of 120℃ to 180℃ is -5% to + in both the vertical and horizontal directions.
0.5%, and in which microcapsules containing at least silver halide, a reducing agent, a polymerizable compound, and a coloring material are coated on a plastic film whose surface is vapor-deposited with aluminum.