JP2002116535A - Self-coloring photosensitive and pressure sensitive recording material, method for producing the same and image forming method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an environment-oriented product, a product having high development efficiency and a self-coloring photosensitive and pressure sensitive recording material capable of ensuring constant photographic characteristics such as photosensitivity, gradation, maximum density and fog density independently of a humidity change of the storage environment and to provide a method for producing the recording material and an image forming method. SOLUTION: In the self-coloring photosensitive and pressure sensitive recording material obtained by disposing a protective layer on a recording layer with photosensitive microcapsules containing a dye precursor, a photoinitiator and a polymerizable compound, a developer and a binder on a base in a monolayer or multilayer state, the base is laminated with polyethylene and at least one cured resin layer to be cured by irradiation with prescribed active energy beams is formed on the laminated polyethylene. In the dry image forming method, the recording material is imagewise exposed and the microcapsules are imagewise collapsed by applying pressure to the entire recording material to form a dye image.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Detailed description of the invention]

[0002]

2. Description of the Related Art U.S. Pat. Nos. 4,399,209 and 4,419,966 each describe an image forming system using microcapsules sensitive to radiation including visible light. These image forming systems
An image forming sheet having a layer containing microcapsules containing a photocurable or photosoftenable photosensitive composition,
After exposing imagewise and hardening or softening the microcapsules imagewise, pressure is applied to break the microcapsules imagewise. This image forming system takes a form in which an image forming sheet and an image receiving sheet are peeled after pressure development.

Further, US Pat. No. 4,440,846 describes an embodiment such as a self-coloring type image forming system. This self-coloring type image forming system has an advantage that it does not require a step of superimposing the image receiving materials, applying pressure to break the microcapsules, and then peeling off the image receiving material, and producing no waste.

However, the support of the self-coloring type image forming system using the photosensitive microcapsules is PE
Resin such as T is used, and when considering incineration disposal, there is a lack of environmental consideration. Therefore, when a paper support laminated with polyethylene is used, changes in the physical properties of the self-coloring type photosensitive pressure-sensitive recording layer due to humidity cause a change in the susceptibility of the capsule to breakage during pressure development, and as a result, fluctuations in humidity cause It has the disadvantage of causing serious problems of displaying different photographic properties.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide an environment-friendly product, a support having smoothness, a high development efficiency, and further, from the time of production to the time of image formation, that is, in the preservation of a raw material. A self-coloring type photosensitizer that can always obtain photographic characteristics such as light sensitivity, gradation, maximum density and fog density regardless of the humidity conditions of the storage environment, regardless of the humidity conditions. An object of the present invention is to provide a pressure-sensitive recording material, a method for producing the same, and an image forming method therefor.

[0006]

An object of the present invention is to provide a photosensitive microcapsule containing a dye precursor, a photoinitiator and a polymerizable compound on a support, a developer, and a water-soluble resin or aqueous dispersion. A self-coloring type photosensitive pressure-sensitive recording material comprising a protective layer on a self-coloring type photosensitive pressure-sensitive recording layer having a binder using a hydrophilic resin in a single layer or a laminated state, wherein the support is laminated with polyethylene, A self-coloring type photosensitive pressure-sensitive recording material, characterized in that at least one active energy ray-curable resin layer which is cured by irradiation with a predetermined active energy ray is formed thereon to a predetermined thickness, and the self-coloring type photosensitive pressure-sensitive recording material is provided. After imagewise exposing the photosensitive pressure-sensitive recording material, the entire self-coloring type photosensitive pressure-sensitive recording material is pressurized to break the microcapsules imagewise, thereby forming a dye image. It could be achieved by dry image forming method that.

[0007] The support used in the present invention is based on general paper such as glassine paper, high-quality paper, art paper, etc., and is cured by irradiating a predetermined active energy ray to paper laminated on one or both sides with polyethylene. At least one active energy ray-curable resin layer having a predetermined thickness. The coating thickness of the active energy ray-curable resin layer provided on the polyethylene laminated paper support used in the present invention is preferably 5 to 20 μm in consideration of smoothness, moisture resistance, hardness and flexibility. But 10-15
μm is particularly preferred.

The binder used in the self-coloring photosensitive pressure-sensitive recording layer according to the present invention is preferably a water-soluble resin or a water-dispersible resin. There is no particular limitation on the water-soluble resin, but starches, alginic acid compounds, cellulose derivatives, casein, gelatin, natural polymer compounds such as,
Examples thereof include polyvinyl compounds, polyacrylamides, polyacrylic acids, and vinylpyrrolidone-maleic acid copolymers as represented by modified polyvinyl alcohols such as polyvinyl alcohol, silanol-modified polyvinyl alcohol, and carboxylic acid-modified polyvinyl alcohol.

The water-dispersible resin is not particularly limited, but preferred examples thereof include an acrylate, a modified acrylate, an acrylate copolymer, and a latex in which a modified acrylate copolymer is dispersed in water. Styrene-butadiene copolymer, styrene-
Water-dispersed latexes such as a maleic anhydride copolymer, a butadiene-methacrylate copolymer, a vinyl acetate-vinyl chloride-ethylene copolymer, and a vinylidene chloride-acrylonitrile copolymer can be given.

The protective layer used in the present invention is preferably formed by overcoating a self-coloring photosensitive pressure-sensitive recording layer containing a water-soluble resin or a water-dispersible resin as a main component. The water-soluble resin used as the protective layer is not particularly limited,
Alginic acid compounds, cellulose derivatives, casein, gelatin, natural polymer compounds such as polyvinyl alcohol,
Examples thereof include polyvinyl compounds, polyacrylamide, polyacrylic acid, and vinylpyrrolidone-maleic acid copolymer, as typified by modified polyvinyl alcohol such as silanol-modified polyvinyl alcohol and carboxylic acid-modified polyvinyl alcohol. Further, the water-dispersible resin is not particularly limited, but may be an acrylic ester, a modified acrylic ester, an acrylic ester copolymer, a latex obtained by dispersing a modified acrylic ester copolymer in water, or a styrene-butadiene copolymer. Coalesce, styrene-maleic anhydride copolymer, butadiene-methacrylate copolymer, vinyl acetate-vinyl chloride-ethylene copolymer,
An aqueous dispersion latex such as a vinylidene chloride-acrylonitrile copolymer can be used.

Further, if necessary, a dioxane derivative,
Hardeners such as methylol melamine and gliogizar, lubricating agents such as stearamide and wax, other surfactants, ultraviolet absorbers, fluorescent dyes, antistatic agents, antiblocking agents, preservatives and other auxiliaries are appropriately added. You can do it. The coating amount of the protective layer used in the present invention is not particularly limited, but is usually ² to 20 g / m ² , preferably 3 to 10 g / m ^{2 as} a dry amount.

The photosensitive microcapsules used in the present invention are described in the aforementioned US Pat. Nos. 4,399,209 and 4,199,209.
It can be produced according to the methods disclosed in the specifications of U.S. Pat. That is, the photosensitive microcapsules contain a photoinitiator and a polymerizable compound in the internal phase. They are typical photopolymerizable and photocrosslinkable materials that thicken or cure upon exposure to actinic radiation.
Further, in addition to the photosensitive material, a dye precursor is contained.

The polymerizable compound used in the present invention is preferably a material curable by radical addition polymerization or ionic polymerization. Representative polymerizable compounds are ethylenically unsaturated organic compounds. These compounds are preferably liquid and contain at least one polymerizable functional group per molecule. More preferably, it is a compound having a plurality of polymerizable functional groups per molecule. Representative examples of these compounds are acrylates such as trimethylolpropane triacrylate or dipentaerythritol hydroxypentaacrylate. Others
Acrylate prepolymer by partial reaction of pentaerythritol with acrylic acid or acrylic acid ester,
Further, US Pat. Nos. 3,783,151 and 3,5
Examples thereof include isocyanate-modified acrylic acid esters, methacrylic acid esters, and itaconic acid esters of polyhydric alcohols disclosed in the specifications of Japanese Patent No. 9,809 and the like.
These polymerizable compounds may be used alone or as a mixture of two or more.

The photoinitiator initiates or accelerates the polymerization reaction of the above-mentioned polymerizable compound upon receiving actinic radiation, and includes an aromatic carbonyl compound, acetophenones, an organic peroxide, a diphenylhalonium salt, and an organic halide 2,4. , 6-
Substituted-S-triazines, 2,4,5-triarylimidazole dimers, azo compounds, metal arene complexes, titanocene compounds, dye borate complexes and the like. The photoinitiator of the present invention is disclosed in JP-A-62-150242 and JP-A-64-6.
0606, JP-A-3-20260 and 3-1160
It is preferable to use ionic dye-counter ion compounds described in JP-A-43-43 and the like.

Particularly preferred is a cationic dye borate complex, which is a compound represented by the general formula (I).

Embedded image In the formula, D ⁺ represents a cationic dye moiety, and R ₁ , R ₂ , R ₃ and R ₄ represent an alkyl group, an aryl group, an aralkyl group, an alkenyl group, an alkynyl group, a cycloalkyl group, or an allyl group. R ₁ , R ₂ , R ₃ and R ₄ may be the same or different. Useful dyes form photoreducible complexes with borate anions and are cationic methine, polymethine, triarylmethane, indoline, thiazine, oxazine and acridine dyes. More preferred are cationic cyanine, carbocyanine, hemicyanine and azomethine dyes.

Useful cationic dyes are represented by the following general formula (I)
It is a cyanine dye of I).

Embedded image In the formula, n is 0, 1, 2, 3, R ₅ is an alkyl group, and Y is C
_{H = CH, N-CH 3} , C (CH 3) 2, O, S, S
e. In the borate anion, it is preferable that at least one to three or less of R ₁ , R ₂ , R ₃ and R ₄ be an alkyl group. The alkyl group has 2 carbon atoms.
It has up to 0, more preferably 1 to 7 carbon atoms. R ₁ ,
R ₂ , R ₃ and R ₄ are preferably a combination of an alkyl group and an aryl group or an aralkyl group, and particularly preferably a combination of three aryl groups and an alkyl group (for example, triphenylborate and the like). .

The dye precursor used in the present invention includes:
A colorless or light-colored electron-donating compound can be used. Representative examples of this compound include a substantially colorless compound having a lactone, lactam, sultone, spiropyran, ester, or amide structure in a partial skeleton. For example, triarylmethane compounds, bisphenylmethane compounds, xanthene compounds, fluoran compounds, thiazine compounds, spiropyran compounds, and the like.
Next, specific examples of the dye precursors that form yellow, magenta, and cyan will be described.

[0018]

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[0019]

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[0020]

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The photosensitive microcapsules used in the present invention are disclosed in JP-A-62-1853 in order to improve the photoresponsiveness.
Nos. 7 and 64-91130, N, N-dialkylaniline and the like described in JP-A-2-291561.
Disulfide compounds such as' -dibenzothiazolyl disulfide; sensitizers such as thiol compounds described in JP-A-2-868;
An antioxidant described in 756 can be used. In addition, various additives such as an ultraviolet absorber and a plasticizer can be appropriately added.

The microcapsules used for encapsulation of the internal phase of the present invention are manufactured using known encapsulation methods including coacervation, interfacial polymerization, or polymerization of one or more monomers in oil. I can do it. Representative examples of suitable capsule wall forming materials include gelatin materials including gum arabic, polyvinyl alcohol, carboxymethyl cellulose (US Pat. No. 2,730,456), and resorcinol-formaldehyde capsule wall forming agents (US Pat. No. 3,755,190). Specification), isocyanate wall forming agent (US Pat. No. 3,914,511), isocyanate-polyol wall forming agent (US Pat. No. 3,796,669), urea-formaldehyde wall forming agent, urea-resorcinol-formaldehyde (US Pat. 4001140) or melamine-formaldehyde and hydroxypropylcellulose (U.S. Pat. No. 4,025,455).

The average diameter of the photosensitive microcapsules used in the present invention is preferably in the range of 1 to 25 μm. The size of the capsule should preferably be small in particle size and narrow in particle size distribution due to photographic characteristics such as resolution, but consideration should be given to troubles such as susceptibility to destruction due to pressure and loss to the pores and fibers of the support. Preferably, the thickness is adjusted to 3 to 15 μm, particularly 3 to 10 μm.

The microcapsules can be mixed with a developer dispersion and a binder which is an essential component of the present invention, and coated on a support to form a self-coloring photosensitive pressure-sensitive recording layer. In this case, the dispersion of the microcapsules and the developer can be used in a ratio of 2/8 to 8/2 by weight of the solid content, but a ratio of 4/6 to 6/4 can be used. Particularly preferred.

In the present invention, the self-coloring type photosensitive pressure-sensitive recording layer can be formed by a known method such as a blade coating method, an air knife coating method, a gravure coating method, a roll coating coating method, a bar coating method, a drop curtain coating method and the like. Is available.

Further, various known techniques in the field of pressure-sensitive recording materials, such as applying a back coat for curling prevention and conducting a conductive treatment for jamming prevention, can be added as required. .

The self-coloring type photosensitive pressure-sensitive recording layer is coated on a support after mixing and stirring each of the above-mentioned coating solution components, or the coating solution containing a capsule and the coating solution containing a color developer are separately prepared to form a support. It can be obtained by applying a layer on the substrate. The coating amount is not particularly limited, but is about 5 to 30 g / m ² in terms of dry weight.

In the self-coloring type photosensitive pressure-sensitive recording layer, in addition to the photosensitive microcapsules, the color developer and the binder, a stilting agent, an inorganic or organic pigment, a dispersant, an ultraviolet absorber, and other defoaming agents Various auxiliary agents such as fluorescent dyes and colored dyes can be appropriately added.

The developer can be selected from those commonly used for non-carbon paper.
Specifically, acid clay, activated clay, atavulgite,
Organic acids such as tannic acid, gallic acid, aromatic carboxylic acids such as benzoic acid, salicylic acid, 3,5-di (α-methylbenzyl) salicylic acid and polyvalent metal salts thereof such as zinc salt, aluminum salt; Examples include phenol resins such as magnesium salts and the like, for example, phenol formaldehyde resins, phenol acetylene resins, and polyvalent metal salts of the phenol resins. Also, HRJ4250 and HRJ45 manufactured by Shchenectady Chemical Co., Ltd.
Phenol-zinc salicylate derivative-formaldehyde condensate, which can be obtained as 42, is also useful. Particularly preferred developers are aromatic carboxylic acids or aromatic carboxylic acids, polyvalent metal salts thereof, phenolic resins or polyvalent metal salts thereof. These developers may be used as a mixture of two or more kinds.

Hereinafter, the present invention will be described specifically with reference to examples, but the present invention is not limited to the examples.

Example 11 1) Preparation of photosensitive microcapsules 1) Preparation of -1 magenta microcapsules Photosensitive microcapsules were prepared with reference to the examples described in JP-A-2-298340.

A. Preparation of internal phase Trimethylolpropane triacrylate (TMP
TA) and 105 g of dipentaerythritol-hydroxypentaacrylate (DPHPA) were added to a beaker and heated at about 90 ° C. for 30 minutes. While stirring, 20 g of the dye precursor (M-1) was added and dissolved. The mixture was further heated and stirred at 90 ° C. for 30 minutes, and gradually cooled to 70 ° C. While stirring, 0.5 parts of photoinitiator (1,1′-di-n-heptyl-3,3,3 ′, 3 ′,-tetramethylindocarbocyanine triphenyl-n-butyl borate) 0.5
g was added, and the mixture was further stirred at 70 ° C. for 30 minutes. While stirring, 1.0 g of DIDMA (2,6-di-isopropyl-N, N-dimethylaniline) was added.
Stirred for minutes. 2,2'-dibenzothiazolyl disulfide 0.5
g was added and stirred for 20 minutes. 10 g of duranate 24A-90PX (Asahi Kasei's polyisocyanate) was added, and the mixture was kept at 70 ° C.

B. Preparation of External Phase 430 g of water was added to a beaker, and the mixture was stirred with an overhead mixer at 500 rpm. Slowly add 8.0 g of VersaTL502 (sulfonated polyethylene manufactured by National Starch) and further add 5 g.
The mixture was stirred at 00 rpm for 15 minutes. 12.65 g of pectin and sodium bicarbonate 0.
24 g were mixed, added at 1500 rpm, and stirred for another 2 hours. The pH was adjusted to 6.0 with NaOH, and
The mixture was stirred at 0 rpm for 10 minutes.

C. Emulsification of the internal phase within the external phase The internal phase was added to the external phase in about 30 seconds. Emulsification and stirring were performed at 3000 rpm for 15 minutes to form an emulsion.

D. Formation of melamine formaldehyde outer wall 250 g of water was placed in a beaker, and 22.2 g of melamine was added with stirring. While stirring, 36.5 g of 37% formaldehyde
Was added. Heated to 60 ° C. and reacted at 60 ° C. for 1 hour (formation of melamine formaldehyde precondensate). The stirring speed of the emulsification was adjusted to 1500 rpm, and the melamine formaldehyde precondensate was injected into the emulsion of C. The pH was adjusted to 6.0 using phosphoric acid. Subsequently, the mixture was cured at 70 ° C. for 60 minutes to form microcapsules having the above-mentioned inner phase as a core. 46.2 g of a 25% urea aqueous solution was added, and stirring was continued for further 60 minutes. The stirring speed was set to 500 rpm and 20% NaOH 10
g was added and cooled to room temperature. The mixture was further stirred at room temperature overnight to obtain a microcapsule dispersion liquid (A). The particle diameter of the obtained microcapsules was 2 to 12 μm, and most was 6 to 7 μm. Further, the solid concentration was measured by an electronic moisture meter manufactured by Shimadzu Corporation to be 25.2% by weight.

1) -2 Preparation of Cyan Microcapsules 1) -1 In the description of preparation of magenta microcapsules, the dye precursor C-1 was replaced by 20 instead of the dye precursor M-1.
g, and the photoinitiator is further converted to 1,1-di-n-heptyl-
3,3.3 ′, 3′-Tetramethylindodicarbocyanine-triphenyl-n-butyl borate was changed to 0.85 g to obtain a microcapsule dispersion liquid (B). The particle diameter of the obtained microcapsules (B) was 2 to 12 μm, and most was 6 to 7 μm. The solid concentration was measured and found to be 26.3% by weight.

1) -3 Preparation of Yellow Microcapsules 1) -1 In the description of preparation of magenta microcapsules, the dye precursor Y-1 was replaced by 20 instead of the dye precursor M-1.
g, and the photoinitiator was further changed to 0.8 g of 3,3-dimethyl-1-heptylindo-3′-heptylthiocyanine-triphenyl-n-butyl borate to obtain a microcapsule dispersion liquid (C). Was. The particle size of the obtained microcapsules (C) is 5 to 10 μm, and most of them are 6 to 8 μm.
m. When the solid concentration was measured, it was 27.5.
% By weight.

2) Preparation of photosensitive solution, preparation and application of support 2) -1 Preparation of photosensitive solution: The microcapsule dispersion obtained in 1) was mixed as follows to prepare photosensitive solution (I). Microcapsule dispersion (A) 6.03 g Microcapsule dispersion (B) 6.86 g Microcapsule dispersion (C) 5.18 g Nipol LX-852 (manufactured by Zeon Corporation) (45% by weight) 2.22 g HRJ4250 (manufactured by Schenectady Chemical) (solid content 33% by weight) 21.97 g Dioxane derivative (hardening agent) 0.50 g Ion-exchanged water 7.24 g

Embedded image 2) -2 Preparation of Support Polyethylene laminated paper (R-IJF-N manufactured by Mitsubishi Paper Mills)
S-110C, 156 μm) An electron beam curable resin (Ebecryl 810; manufactured by Daicel UCB) is applied on the surface to a dry weight of 3 g / m ² , and an electron beam irradiator (Electro Curtain CB-150; ESI) 30 kGy as absorbed dose at an accelerating voltage of 175 KV
The active energy ray-curable resin layer applied on the surface was cured by irradiating the substrate with the above electron beam to obtain a support of the present invention. 2) -3 Coating The photosensitive solution prepared in 2) -1 was coated on the support of the present invention prepared in 2) -2 so that the dry weight was 15 g / m ^2, and a self-coloring type photosensitive pressure-sensitive recording layer was formed. (I) (present invention). Next, the same amount of the above-mentioned photosensitive solution was applied to a polyethylene laminated paper (R-IJF-NS-110C manufactured by Mitsubishi Paper) support, and a self-coloring photosensitive pressure-sensitive recording layer (II) (comparative)
Was formed.

Subsequently, in order to form a protective layer on the coated surface of each of the coated products, a coated product having a protective layer having the following composition was prepared. Soap-free acrylic emulsion, Acryset SA-532 (manufactured by Nippon Shokubai Co., Ltd.) (solid content: 25% by weight) 16.10 g Grigiozar (solid content: 40%) 1.50 g Perex OTP (manufactured by Kao Corporation) ( (Solid content: 5%) 1.00 g Snowtex C (Nissan Chemical) (solid content: 20%) 1.00 g water: 30.40 g The coated amount of the prepared protective layer forming coating material after drying was 3 g / m.
^{(2) A} self-coloring type photosensitive pressure-sensitive recording material (I) (the present invention) and a self-coloring type photosensitive pressure-sensitive recording material (II) (comparative example) were formed by coating so that the coating was dried. .

Next, the obtained self-coloring type photosensitive pressure-sensitive recording material (I) and the self-coloring type photosensitive pressure-sensitive recording material (II)
Red, Green, B
Exposure was through a lue filter. After the exposure, pressure development was performed through a pressure roller. Then, it was further kept in an oven at 60 ° C. for 1 minute to promote color development. As a result, full-color images were obtained for both the self-coloring type photosensitive pressure-sensitive recording material (I) and the self-coloring type photosensitive pressure-sensitive recording material (II). Before the image formation, the self-coloring type photosensitive pressure-sensitive recording material (I) and the self-coloring type photosensitive pressure-sensitive recording material (II) are used.
The cells were stored for one week in an incubator adjusted to 1 ° C. and 80% RH. Thereafter, an image is formed using the image forming method,
The image density was measured using a Macbeth densitometer TR927.

Table 1 shows the results.

[Table 1] As shown in Table 1, a self-coloring type photosensitive pressure-sensitive recording material (I)
Indicates high development efficiency, and furthermore, 21 ° C., 80% RH, 1
Even after storage for a week, high maximum concentration (Dmax) and light sensitivity (D50) were maintained. On the other hand, the self-coloring type photosensitive pressure-sensitive recording material (II) used for comparison has a lower Dmax,
Light sensitivity was reduced.

Example 2 In the description of Example 1, the following composition was used as an active energy-curable resin layer applied to polyethylene laminated paper. (Active energy ray curable resin composition)-Purple UV-6300B (Oligomer manufactured by Nippon Synthetic Chemical Industry) 50 g-Trimethylolpropane triacrylate 30 g-Hexadecyl acrylate 30 g-Isopropylthioxanthone 1.4 g-Ethyl-p-dimethylaminobenzoate 2. 5 g ・ 2-mercaptobenzoxazole 1 g The above composition was mixed with polyethylene laminated paper (R
-IJF-NS-110C, 156 μm), applied to a dry weight of 4 g / m ² on a surface, and cured by irradiating the active energy ray-curable resin composition coated surface side with a high pressure mercury lamp with light. A support was obtained.

2) The photosensitive solution prepared in -1 was applied onto the support of the present invention prepared as described above so as to have a dry weight of 15 g / m ^2, and a self-coloring type photosensitive pressure-sensitive recording layer (III)
(Invention) was formed. Subsequently, a protective layer was formed on the coated surface of each of the coated articles in the description of Example 1 to obtain a self-coloring type photosensitive pressure-sensitive recording material (III) (the present invention). Then, the full-color original image is imported to a personal computer, and a printer (trade name: DPD-200, Aztech Systems Ltd.)
D) and a self-coloring photosensitive pressure-sensitive recording material (II)
I) and (II) were imagewise exposed and pressure developed. In both samples, a full-color image in which the original image was reproduced well was obtained.

Subsequently, in the same manner as described in Example 1,
The image characteristics were evaluated. Table 2 shows the results.

[Table 2] As shown in Table 2, the self-coloring type photosensitive pressure-sensitive recording material (II
I) represents high development efficiency, and furthermore, 21 ° C., 80% RH,
Even after storage for one week, the high maximum concentration (Dmax) and the light sensitivity (D50) were maintained.

[0044]

According to the present invention, an environment-friendly product, a product having a high developing efficiency, and furthermore, from the time of production to the time of image formation, that is, the preservation of the raw material, does not depend on the humidity change of the preservation environment. A self-coloring type photosensitive pressure-sensitive recording material capable of constantly obtaining photographic characteristics such as photosensitivity, gradation, maximum density, fog density and the like, and a method for producing the same, regardless of the humidity conditions. An image forming method can be provided.

Claims (24)

[Claims] 1. A self-coloring type photosensitive pressure-sensitive material comprising a support in which a photosensitive microcapsule containing a dye precursor, a photoinitiator and a polymerizable compound, a developer, and a binder are provided in a single layer or a laminated state. In a self-coloring type photosensitive pressure-sensitive recording material having a protective layer provided on a recording layer, the support is laminated with polyethylene, and at least one active energy ray-curable resin is cured thereon by irradiation with a predetermined active energy ray. A self-coloring type photosensitive pressure-sensitive recording material, wherein a layer is formed to a predetermined thickness. 2. The self-coloring photosensitive pressure-sensitive recording material according to claim 1, wherein the active energy ray of the active energy ray-curable resin is an electromagnetic wave. 3. The self-coloring photosensitive pressure-sensitive recording material according to claim 2, wherein the active energy ray-curable resin is an ultraviolet curable acrylic resin. 4. The self-coloring photosensitive pressure-sensitive recording material according to claim 1, wherein the binder is a water-soluble resin or a water-dispersible resin. 5. The self-coloring photosensitive pressure-sensitive recording material according to claim 4, wherein the binder is an aqueous dispersion type latex. 6. The self-coloring photosensitive pressure-sensitive recording material according to claim 5, wherein the binder is a modified acrylic acid ester copolymer latex. 7. The self-coloring photosensitive pressure-sensitive recording material according to claim 1, wherein the protective layer is formed of a water-soluble resin or a water-dispersible resin. 8. The self-coloring photosensitive pressure-sensitive recording material according to claim 1, wherein the polymerizable compound is a radical addition polymer. 9. The self-coloring photosensitive pressure-sensitive recording material according to claim 1, wherein the photoinitiator is an initiator that absorbs actinic radiation to generate free radical polymerization of a polymerizable or crosslinkable compound. 10. The self-coloring photosensitive pressure-sensitive recording material according to claim 9, wherein the photoinitiator is a compound represented by the following general formula (I). Embedded image In the formula, D ⁺ represents a cationic dye moiety, and R ₁ , R ₂ , R ₃ and R ₄ represent an alkyl group, an aryl group, an aralkyl group, an alkenyl group, an alkynyl group, a cycloalkyl group, or an allyl group. R ₁ , R ₂ , R ₃ and R ₄ may be the same or different. 11. A self-coloring photosensitive pressure-sensitive pressure according to claim 1, wherein the dye precursor is a substantially colorless electron donating compound having a lactone, lactam, sultone, spiropyran, ester or amide structure in a partial skeleton. Recording material. 12. The self-color-forming photosensitive pressure-sensitive recording material according to claim 1, wherein the color developer is a clay, an aromatic carboxylic acid or a polyvalent metal salt thereof, a phenol resin or a polyvalent metal salt thereof, or a mixture thereof. . 13. A self-coloring photosensitive pressure-sensitive material comprising a support in which a photosensitive microcapsule containing a dye precursor, a photoinitiator and a polymerizable compound, a developer, and a binder are provided in a single layer or a laminated state. In a self-coloring type photosensitive pressure-sensitive recording material having a protective layer provided on a recording layer, the support is laminated with polyethylene, and at least one active energy ray-curable resin is cured thereon by irradiation with a predetermined active energy ray. After imagewise exposing the self-coloring type photosensitive pressure-sensitive recording material, characterized in that the layer is formed to a predetermined thickness, the entire self-coloring type photosensitive pressure-sensitive recording material is pressed to break the microcapsules imagewise. And a dye image forming method. 14. The dry image forming method according to claim 13, wherein the active energy ray of the active energy ray-curable resin is an electromagnetic wave. 15. The dry image forming method according to claim 14, wherein the active energy ray-curable resin is an ultraviolet curable acrylic resin. 16. The dry image forming method according to claim 13, wherein the binder is a water-soluble resin or a water-dispersible resin. 17. The dry image forming method according to claim 16, wherein the binder is an aqueous dispersion latex. 18. The self-coloring photosensitive pressure-sensitive recording material according to claim 17, wherein the binder is a modified acrylate copolymer latex. 19. The dry image forming method according to claim 13, wherein the protective layer is formed of a water-soluble resin or a water-dispersible resin. 20. The dry image forming method according to claim 13, wherein the polymerizable compound is a radical addition polymer. 21. The dry image forming method according to claim 13, wherein the photoinitiator is an initiator that absorbs actinic radiation to generate free radical polymerization of a polymerizable or crosslinkable compound. 22. The dry image forming method according to claim 13, wherein the photoinitiator is a compound represented by the following general formula (I). Embedded image In the formula, D ⁺ represents a cationic dye moiety, and R ₁ , R ₂ , R ₃ and R ₄ represent an alkyl group, an aryl group, an aralkyl group, an alkenyl group, an alkynyl group, a cycloalkyl group, or an allyl group. R ₁ , R ₂ , R ₃ and R ₄ may be the same or different. 23. The dry image forming method according to claim 13, wherein the dye precursor is a substantially colorless electron donating compound having a lactone, lactam, sultone, spiropyran, ester or amide structure in a partial skeleton. 24. The dry image forming method according to claim 13, wherein the color developer is a clay, an aromatic carboxylic acid or a polyvalent metal salt thereof, a phenol resin or a polyvalent metal salt thereof, or a mixture thereof.