JPH03154060A - Transferred image forming method - Google Patents

Abstract

PURPOSE:To eliminate the need of postexposure, to transfer an image on a material to be transferred at a comparatively low temperature and to avoid the deviation of an image by using an image receiving sheet formed by successively forming a thermosoftening layer and a mold-released layer on a supporting body. CONSTITUTION:The image receiving sheet is formed by laminating the thermosoftening layer consisting of polyolefine, etc., and the mold-released layer consisting of silicone resin, etc., in this order on the supporting body consisting of polyester film, etc. After a colored image is formed by imagewisely exposing an image forming material, which is obtained by applying a color recording layer, and developing the image, it is transferred to the image receiving material. Thereafter, the transferred image is transferred to a white art paper, etc., to obtain a color proof for printing. Since the image is transferred to the material to be transferred such as an art paper, etc., at the comparatively low temperature by using this image receiving material, the deviation of the image is avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transfer image forming method. The present invention can be used, for example, as a method for forming a color proof for color proofing in color printing. It has excellent adhesion to certain transfer materials, and furthermore, it is possible to directly transfer only the colored image to the transfer material, making it possible to obtain a transferred image that resembles a printed matter.

[Conventional technology]

In a conventional transfer image forming method, for example, in forming a conventional transfer type color proof, the following means were used to form an image on a transfer material.

That is, firstly, a method of transferring a photosensitive layer containing a coloring material to a support and repeating exposure and development to form an image; secondly, a method of laminating a photosensitive adhesive layer on a support and applying toner after exposure. Thirdly, a means for sequentially transferring a monochromatic image formed on a color sheet to an image-receiving layer and re-transferring it to a material to be transferred has been used.

However, each of the above-mentioned means (1) requires thermal transfer under high heat during image transfer, which tends to cause image shift.

■The transferred image is covered with a polymer film and does not resemble the printed image, giving a different perspective and impression from the printed image.

■Poor adhesion to uneven transfer materials.

There is a problem.

On the other hand, Japanese Patent Laid-Open No. 59-97140 discloses a method for obtaining a color proofing sheet by a simple process, in which an image forming material is imagewise exposed through a color separation mask, and then
A color image is formed by development, and the color image is transferred to an image-receiving layer containing a photopolymerizable composition using a thermal laminator or the like, and then sufficient post-exposure is given to the image-receiving layer to cause photopolymerization. let me,
A method of curing to obtain a transferred image is disclosed.

However, this method requires post-exposure of the image-receiving layer in addition to image-wise exposure of the image-forming material, and if this is not done, the film strength is weak and the support cannot be easily peeled off after transfer. ing.

Furthermore, the obtained transferred image is covered with a polymer film and has the disadvantage that it does not resemble a printed matter (problem ① above).

Furthermore, since a thermal laminator or the like is used, the above problem (1) has not been fully solved, and the above problem (2) has also not been solved.

[Purpose of the invention]

The present invention solves the above-mentioned problems of the prior art, and enables good image transfer at a relatively low temperature, thereby eliminating image shift.
Furthermore, there is no need for post-exposure, and it is possible to transfer only the image and obtain an image that is not covered with a polymer film, etc. Therefore, even when used as a color proof for proofing, it is possible to obtain an image that is extremely similar to the actual printed matter. Furthermore, it is an object of the present invention to provide a transfer image forming method capable of obtaining an excellent transfer image with good adhesion even to an uneven transfer material.

[Means to solve the problem]

The object of the present invention is to form a colored image by developing an image forming material formed by coating a colored recording layer containing a photosensitive composition on a support having a releasable surface after imagewise exposure. death,
A method for forming a transferred image by transferring this onto an image-receiving sheet, characterized in that the image-receiving sheet is provided with a heat-softening layer and a release layer formed in this order on a support. This is achieved by a transfer image forming method.

The present invention will be explained in more detail below.

First, the image forming material used in the present invention will be explained.

The image forming material used in the present invention is formed by coating a colored recording layer containing a photosensitive composition on a support having a releasable surface.

As the support for the image forming material, a polyester film, particularly a biaxially oriented polyethylene terephthalate film, is preferred from the viewpoint of dimensional stability against water and heat. others,
Acetate film, polyvinyl chloride film, polystyrene film, and polypropylene film can also be preferably used.

The support in the image forming material used in the present invention has a releasable surface.

If the material of the support itself has a good releasable surface, the support can be used as is. Alternatively, the support may be provided with a releasable surface by subjecting it to a mold release treatment using a suitable oil-repellent substance or by providing an undercoat layer that functions as a mold release layer.

Examples of oil-repellent substances include silicone resins, fluororesins, and fluorosurfactants. Alternatively, a polyethylene film or a polypropylene film is laminated to a biaxially oriented polyethylene terephthalate film using an adhesive, or a polyethylene or polypropylene film is combined with polyethylene terephthalate using a coextrusion method, and polyethylene or polypropylene is laminated onto a polyethylene terephthalate film. ! By forming a layer, a mold release treatment can be applied.

Examples of the undercoat layer include alcohol-soluble polyamide, alcohol-soluble nylon, a blend of a partially esterified resin of a copolymer of styrene and maleic anhydride, and methoxymethylated nylon, polyvinyl acetate, polyacrylate, polyvinyl acetate, polyacrylate, and polyester. Copolymers of methyl methacrylate and acrylate, polyvinyl chloride, copolymers of vinyl chloride and vinyl acetate, polyvinyl butylade, cellulose acetate phthalate, methylcellulose, ethylcellulose, cellulose diacetate, cellulose triacetate, polyvinyl alcohol It is preferable to use a material that has a weak adhesion to the support.

When an undercoat layer is provided and used as a release layer, its thickness is generally in the range of 0.01 to 30 μm, particularly preferably in the range of 0.1 to 5 μm.

As a method for surface treatment of the support in order to provide the support with a releasable surface, for example, a solution or an emulsion prepared by dissolving the resin to form the undercoat layer in an organic solvent is applied onto the support. There is a way to apply it. Further, a method of laminating polypropylene film, polyethylene film, etc. can be mentioned.

Next, the colored recording layer having the photosensitive composition of the image forming material will be explained.

The colored recording layer containing the photosensitive composition may be formed in one layer or in two or more layers. In the case of two or more layers, the photosensitive layer containing the photosensitive composition and the colored layer containing the colorant may be separate layers.

Various types of photosensitive compositions can be used, and when irradiated with actinic rays, their molecular structure undergoes a chemical change in a short period of time, and their solubility in solvents changes, resulting in certain types of photosensitive compositions. All compounds such as monomers, prepolymers and polymers whose exposed or unexposed areas are dissolved and removed when a solvent is applied are included. Examples of photosensitive compositions that can be used include photocrosslinking type window light, which is typified by polyvinyl alcohol esterified with cinnamic acid, and is a so-called negative-positive type composition in which the solubility of exposed areas decreases. There are systems in which a diazonium salt or its condensate is mixed with polyvinyl alcohol, polyvinylpyrrolidone, polyacrylamide, etc., and a system in which an aromatic azide compound is used as a photocrosslinking agent and mixed with a binder such as cyclized rubber. Furthermore, photosensitive resins using photoradical polymerization or photoionic polymerization can also be used.

In addition, as a so-called positive-positive type that increases the solubility in the exposed area, there is, for example, a photosensitive resin composition using 0-quinonediazide as a photosensitizer, and specifically, for example, 1,2-benzoquinonediazide- 4-sulfonyl chloride, 1,2-naphthoquinonediazide-4-sulfonyl chloride, 1゜2-naphthoquinonediazide-5-sulfonyl chloride, or 1,2-naphthoquinonediazide-6-sulfonyl chloride and containing a hydroxyl group and/or an amino group A compound obtained by condensing compounds is preferably used.

Examples of the hydroxyl group-containing compound include trihydroxybenzophenone, dihydroxyanthraquinone, bisphenol A, phenol novolac resin, resorcin benzaldehyde condensation resin, pyrogallol acetone condensation resin, and the like. In addition, examples of amino group-containing compounds include aniline, and-aminodiphenylamine, P-aminobenzophenone, 4.4°-diaminophenylamine,
4.4'-diaminobenzophenone and the like.

Regarding 0-quinonediazide compounds, including those mentioned above, please refer to "Light 5ens" by J. KOSAR.
tive System” (Wiley & 5ons,
New York, 1965) and "Photosensitive Polymer" by Yonematsu and Inui (Kodansha, published in 1977).

In addition, positive-positive type compounds include: (1) a compound that can generate an acid upon irradiation with actinic rays, (2) a compound that has at least one bond that can be decomposed by an acid, and (4) a Tuvolac resin that contains two or three different types of phenols. It is also possible to use a photosensitive composition containing.

The suitable content of the photosensitive composition in the colored recording layer used in the present invention is, for example, 5 to 80% by weight.

The colored recording layer having the photosensitive composition, whether it is a single layer or divided into two or more layers, can contain a binder, and such a binder may include a film-forming and solvent-soluble binder. Preferably, a polymer compound that can be dissolved or swelled in an alkaline developer can be used.

Specific examples of such polymer compounds include the following -
A polymer compound containing a structural unit having an aromatic hydroxyl group represented by Tsuzuriyo (1) in its molecular structure is exemplified.

General formula (1) Here, RII and RI2 are a hydrogen atom, an alkyl group or a carboxylic acid group, Rl3 is a hydrogen atom, a halogen atom or an alkyl group, R'' is a hydrogen atom, an alkyl group, a phenyl group or an aralkyl group, X is a divalent organic group that connects to a nitrogen atom and an aromatic carbon atom, and n is 0 or 1. Y is a phenylene group that may have a substituent or a naphthylene group that may have a substituent. represents.

Specifically, examples of monomers forming the structural unit represented by the above-mentioned binding margin (1) include N-(4-hydroxyphenyl)-(meth)acrylamide, N-(2-hydroxyphenyl)-( meth)acrylamide, N-(4
(meth)acrylamide monomers such as -hydroxynaphthyl)-(meth)acrylamide; o-, m- or p-hydroxyphenyl (meth)acrylate monomers; o-, m- or p-hydroxystyrene monomers, etc. . Preferably o-, m- or p-hydroxyphenyl (meth)acrylate monomers, N-
(4-hydroxyphenyl)-(meth)acrylamide monomer, more preferably N-(4-hydroxyphenyl)-(meth)acrylamide monomer.

In the present invention, it is preferable to use a copolymer of a heptamer forming a structure represented by general formula (1) and the following monomers as a binder.

1 RIS Here, RIS represents a hydrogen atom, an alkyl group, or a halogen atom, and R11k represents an alkyl group, a phenyl group, or a naphthyl group.

The ratio of the group having an aromatic hydroxyl group represented by the general formula (1) in the above copolymer is preferably 1 to 30 mol%.

The proportion of units formed from the acrylonitriles in the copolymer is preferably 0 to 50 mol%, and more preferably 5 to 40 mol% in consideration of developability. It is preferable that the proportion of the structural units is 50 to 95 mol % from the viewpoint of developability with a low alkaline aqueous solution, and 60 to 95 mol % gives the most preferable developability.

In addition to the above-mentioned structural units, the above-mentioned acrylic acids such as acrylic acid or methacrylic acid may be copolymerized with the polymer compound that is the copolymer for the purpose of finely adjusting the developability. Considering the development latitude, the proportion of the aggregate in the cough polymer compound is preferably 0 to 20 mol%, most preferably 0 to 10 mol%.

The weight average molecular weight of such a polymer compound is preferably 1.000 to 100,000, more preferably 1.000 to 100,000, from the viewpoint of developability or resolution when a low alkaline aqueous solution is used as a developer. , 000 to 30.000 is suitable. These polymer compounds can be synthesized by a well-known copolymerization method.

Specific examples of such polymer compounds include copolymers having the following structure.

H (weight average molecule m: 1.000-30,000)
Q: m: n-<1-25): (5-40)
: (50-95) A polymer compound having a carboxylic acid vinyl ester polymerized unit in its molecular structure can also be preferably used.

RCOOCII = C11□ However, 10 represents an alkyl group having 1 to 17 carbon atoms.

Any polymeric compound having the above structure can be used, but as the carboxylic acid vinyl ester monomer that constitutes the polymerized unit shown in the above-mentioned margin, the following examples may be used: The preferred name and chemical formula are also shown.

■Vinyl acetate C1hCOOCIl = CI
! □■Vinyl propionate CIhCl1zCOOC
II-C1lz■ Vinyl butyrate (:II 2
(Cll 2) IC0OCII = C1l! ■
Vinyl pivalate (C1h)sccOOcjl=
cIIz■Vinyl caproate C1h (Clh)
4(:0OCII-C1lz ■ Vinyl caprylate ■ Vinyl caprate ■ Vinyl laurate ■ Vinyl myristate [phase] Vinyl palmitate ■ Vinyl stearate @ vinyl versatate C11°C113 (C11□) 6COOCIl = C00C
II+(CHz)scOOcH=c)jzClh(CH
z) tocOOcIl=cIlzCH3(CIl□)
t zcOOcII = CHzC113(C1l□
L4COOC1l=C112CHi(CI□) 16C
OOCH=C1l! R'-C-C00CII=
CI+□1?2 (R1 and R1 are alkyl groups, and the sum of their carbon numbers is 7. In other words, as a dicarboxylic acid vinyl ester monomer in the form R' + R'' = Ctfltb, the main chain of carboxylic acid It is more preferable to have 1 to 4 carbon atoms, and vinyl acetate is particularly preferable.

Note that the above R also includes an alkyl group having a #A group, that is, a vinyl ester of a substituted carboxylic acid is also included in the polymerized unit.

The polymer compound may be a polymer obtained by polymerizing one type of carboxylic acid vinyl ester, a polymer obtained by copolymerizing two or more types of carboxylic acid vinyl esters, or a polymer that can be copolymerized with carboxylic acid vinyl ester. It may be a copolymer with monomers in any composition ratio.

Examples of monomer units that can be used in combination with the polymerized unit indicated by the above-mentioned binding margin include ethylenically unsaturated olefins such as ethylene, propylene, isobutylene, butadiene, and isoprene, e.g. ebastyrene, σ-methylstyrene, Styrenes such as p-methylstyrene and p-chlorostyrene, acrylic acids such as acrylic acid and methacrylic acid, unsaturated aliphatic dicarboxylic acids such as itaconic acid, maleic acid, and maleic anhydride, such as diethyl maleate, maleic acid, etc. Diesters of unsaturated dicarboxylic acids such as dibutyl acid, di-2-ethylhexyl maleate, dibutyl fumarate, di-2-ethylhexyl fumarate, such as methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, acrylic dodecyl acid, 2-chloroethyl acrylate,
α-methylene aliphatic monocarboxylic acid esters such as phenyl acrylate, methyl α-chloroacrylate, methyl methacrylate, and ethyl methacrylate; Nitriles such as acrylonitrile and mequacrylonitrile; Amides such as acrylamide; e.g. acrylic Anilide i11 such as anilide, p-chloro[1 acrylanilide, m-nitroacrylanilide, m-methoxyacrylanilide, etc., vinyl ethers such as evamethyl vinyl ether, ethyl vinyl ether, inbutyl vinyl ether, β-chloroethyl vinyl ether, vinyl chloride , vinylidene chloride, vinylidene cyanide, such as l-methyl-1-methoxyethylene, 1°l-dimethoxyethylene, 1,2-dimethoxyethylene, 1.
l-dimethoxycarbonylethylene, l-methyl-1-
Ethylene derivatives such as nitroethylene, such as N-vinylpyrrole, N-vinylcarbazole,
There are vinyl monomers such as N-vinyl compounds such as N-vinylindole, N-vinylpyrrolitene, and N-vinylpyrrolidone. Present in molecular compounds.

Particularly preferred polymer compounds for use in the present invention are those having vinyl acetate polymerization units in their molecular structure. Among them, vinyl acetate polymerization units are 40 to 95.
wt%, number average molecular weight (MN) is 1,
000 to 100.000, weight average molecular ffi (
MW) is preferably 5.000 to 500.000.

more preferably), vinyl acetate polymerized units (especially if this is 4
0 to 95 wt%) and polymeric compounds containing carboxylic acid vinyl ester polymer units with a longer chain than vinyl acetate are preferred, especially those with a number average molecular weight (MN) of 2.000 to 60.
,000. Weight average molecular weight (MW) is 10.000~
150.000 is preferred.

In this case, the monomer that copolymerizes with vinyl acetate to form a polymer compound containing vinyl acetate polymerized units may be any monomer as long as it can form a copolymer, such as the above-mentioned monomers. You can arbitrarily choose from among them.

Copolymers that can be used as polymer compounds in the present invention are listed below by indicating their monomer components. However, it goes without saying that the invention is not limited to the following examples.

■Vinyl acetate-acrylic acid ester■Acetic acid and nyl-maleic acid ester■Vinyl acetate-ethylene■Vinyl acetate-vinyl carboxylate ester■Vinyl acetate-ethylene■Vinyl acetate-styrene ■Vinyl acetate-crotonic acid■Acetic acid and nyl-maleic acid■ Vinyl acetate-2-ethylhexyl acrylate [Phase] Acetic acid and nyl-di-2-ethylhexyl maleate ■Vinyl acetate-methyl vinyl ether ■Vinyl acetate-vinyl chloride ■Vinyl acetate-N-vinylpyrrolidone ■Vinyl acetate-vinyl propionate ■Vinyl acetate pivalin Vinyl acid [Phase] Acetic acid and vinyl versatate ■ Vinyl acetate - Vinyl laurate ■ Vinyl acetate-vinyl stearate [Phase] Acetic acid and vinyl versatate - Ethylene [Phase] Vinyl acetate-vinyl versatate -2 - Ethylhexyl acrylate ■ Vinyl acetate and vinyl rhubasate O Acetic acid and vinyl versatate - Crotonic acid ■ Vinyl propionate Vinyl rhubasate [Phase] Vinyl rhubasate propionate - Vinyl crotonic acid @pivalic acid-vinyl stearate-maleic acid In the present invention, a novolak resin obtained by polycondensation of at least one type of phenol and an active carbonyl compound can also be used as a binder.

These phenols include all compounds in which at least one hydrogen atom bonded to an aromatic ring is substituted with a hydroxyl group, and specifically include phenol, 0-cresol, m-cresol, p-cresol, 3-cresol, etc. Examples include .5-xylenol, 2.4-xylenol, 2.5-xylenol, carvacrol, thymol, catechol, resorcinol, hydroquinone, pyrogallol, phloroglucin, and an alkyl group (1 to 8 carbon atoms) substituted phenol.

Active carbonyl compounds include, for example, aldehydes and ketones, and specific examples include formaldehyde, acetaldehyde, benzaltehyde, acrolein, furfural, and acetone.

Examples of polycondensation resins include phenol formaldehyde novolak resin, m-cresol formaldehyde novolac resin, phenol/m-cresol/formaldehyde copolycondensate resin, phenol/p-cresol/formaldehyde copolycondensate resin, m-cresol/p -Cresol/formaldehyde copolycondensate resin, 0-cresol/p-cresol 41-culmaldehyde copolycondensate resin, phenol/0-cresol/1n-cresol/formaldehyde copolycondensate resin, phenol o
Examples include -cresol/p-cresol/formaldehyde copolycondensate resin, phenol/m-cresol/p-cresol/formaldehyde copolycondensate resin, and the like.

A preferred novolac resin is a phenol formaldehyde novolac resin, and the molecular weight is a weight average molecular weight MW of 3500 to 500 and a number average molecular weight MN of 1000 to 20.
A range of 0 is preferred.

The molecular weight of the resin is measured by GPC (gel permeation chromatography).

Calculation of the number average molecule 1iMN and weight average molecule fiMw can be found in “°Journal of the Chemical Society of Japan” written by Morio Takushoku, Tatsuya Miyabayashi, and Masayuki Kuninaka.
" The method described on pages 800 to 805 (1972) is used to level out the peaks of the oligomer region (connect the centers of the peaks and valleys).

In addition, in the novolac resin, pyrolysis gas chromatography (PGC) is used as a method for confirming the quantitative ratio of different phenols used in the synthesis thereof.

Regarding pyrolysis gas chromatography, its principles,
The equipment and experimental conditions are, for example, Nippon Kagakujou, Takushoku Shinsho New Experimental Course, Volume 19, Polymer Chemistry (I), p. 474~
It is described on page 485 (published by Maruzen in 1978), etc.
The J method for qualitative analysis of novolac resins by pyrolysis gas chromatography is based on the method described in Morio Takushoku, Takashi Kuninaka, and Masayuki Kuninaka, "Analytical Chemistry," Vol. 18, pp. 47-52 (1969). shall be.

Furthermore, other polymeric compounds that can be used as a binder in the present invention include sulfoalkyl esters of (meth)acrylic acid (co)polymers, vinyl acecool (co)polymers, vinyl ether (co)polymers, Also included are acrylamide (co)polymers, styrene (co)polymers, cellulose derivatives, and the like.

In addition, when the colored photosensitive layer contains a novolak resin obtained by polycondensation of at least one type of phenol and an active carbonyl compound as a binder, in order to prevent coloring due to oxidation of the novolak resin, the colored photosensitive layer Antioxidants can also be included in the layer.

The image forming material used in the present invention can be colored with any coloring agent.

Coloring agents include dyes and pigments, and in particular,
When used for color proofing, pigments and dyes with tones that match the usual colors required, i.e., yellow, magenta, cyan, and black, are required, but other materials such as metal powder, white pigments,
Fluorescent pigments are also used. Below are some examples of various pigments and dyes known in the art.

(C, I mean color index).

Victoria Pure Blue (C, 142595) Auramine (C, I 41000) Cathylone Brilliant Flavin (C, I Basic 13) Rhodamine 6 G CP (C, 145160) Rhodamine B (C, [45170) Safranin OK2O: 100 (C, I5024
0) Erioglaucine
201 Lionor Yellow (C, I 21090)
Lionor Yellow GRO (C, Summer 21090') Shimla First Yellow 8CF (C, I 21105) Benzidine Yellow 4T-564D (C, I 21095) Shimla Furth Red 4015 (C, I 12355') Lionor Red 7 B12O3 ( C, 115830)
First Gen Blue'r CR-L (C, 174160) Lionor Blue SM (C, I 26150) Mitsubishi Carbon Black M A-100 Mitsubishi Carbon Black #30. #40. #50 The content of the colorant used in the present invention in the colored photosensitive layer is selected in consideration of the target optical density and the removability of the colored photosensitive layer with respect to the developer.
It is preferably in the range of 30% by weight.

Just apply it on your body.

As a solvent, water, methanol, ethanol, acetone, ethyl acetate, methyl cellosolve, ethyl cellosolve,
dioxane, methyl ethyl ketone, cyclohexanone,
Diethylene glycol monomethyl ether, γ-butyrolactone, tetrahydrofuran, methylene chloride,
Examples include ethylene chloride, dimethyl sulfoxide, and dimethyl formamide, and these can be used alone or in combination of two or more.

Next, the image receiving sheet used in the transfer image forming method of the present invention will be explained.

The image-receiving sheet used in the present invention has a heat-softening layer and a release layer formed in this order on a support.

As the support for forming the image-receiving sheet, as in the case of the support for image-forming materials, polyester films, especially biaxially oriented polyethylene terephthalate films, are preferable in terms of dimensional stability against water and heat; vinyl chloride film, polystyrene film,
Polypropylene film, polyethylene film may also be used.

The heat-softening layer on the support of the image-receiving sheet has a property of being softened at the temperature during thermal transfer. Generally, it is preferable to form it from a thermoplastic resin, and the thermoplastic resin preferably has a softening point of 130°C to 150°C.
The softening point temperature shown here is the value shown by the VICAT softening point or the ring and ball method.

Specifically, the following resins can be mentioned as preferred resins when carrying out the present invention.

Polyolefins such as polyethylene and polypropylene.

Ethylene copolymers such as ethylene and vinyl acetate, ethylene and acrylic ester, and ethylene and acrylic acid.

PVC.

Vinyl chloride copolymers such as vinyl chloride and vinyl acetate.

Polyvinylidene chloride.

Vinyl chloride, redene copolymer.

polystyrene.

Styrene copolymers such as styrene and maleic anhydride.

Polyacrylic acid ester.

Polyester resin.

Polyurethane resin.

Acrylic ester copolymers such as acrylic ester and vinyl acetate.

Polymethacrylic acid ester.

Methacrylate ester copolymers such as methyl methacrylate and vinyl acetate, and methyl methacrylate and acrylic acid.

Polyvinyl acetate.

Vinyl acetate copolymer.

Vinyl butyral resin.

Polyamide resins such as nylon, copolymerized nylon, and N-alkoxymethylated nylon.

synthetic rubber.

Petroleum resin.

Chlorinated rubber.

Polyethylene glycol.

Polyvinyl alcohol hydrozine phthalate.

Cellulose derivative, cellulose acetate lactate,
Cellulose acetate succinate.

Sheratsk.

wax.

The heat-softening layer can be provided on the support of the image-receiving sheet using various appropriate methods.

The thickness of the heat-softening layer is suitably and generally preferably in the range of 1 to 50 μrn, particularly preferably 5 to 30 μrn. Examples of the thickness of the heat softening layer include silicone resin, fluororesin, polyethylene, polypropylene, and ethylene-α-olefin copolymer. , propylene-α-olefin copolymer, ethylene-propylene copolymer, ethylene-propylene-diene copolymer, ethylene-acrylic acid copolymer, ethylene-vinyl acetate copolymer, ionomer resin, wax, nylon, copolymer Polyamide resins such as polymerized nylon can be used.

Furthermore, silicone resin or fluororesin can be added to melamine resin, polyacrylic acid ester, or urethane resin.

In addition, polypropylene film, polyethylene film, etc. exhibit good mold release properties without special mold release treatment, so in a preferred embodiment, the film is thinner than the thickness of the support.
A polypropylene layer or a polyethylene layer can be provided as a release layer.

The thickness of the release layer is suitably and generally preferably in the range of 0.01 to 30 .mu.In, particularly preferably in the range of 0.1 to 5 .mu.m.

Examples of the method of providing the above-mentioned mold layer on the heat-softening layer include a method in which a polypropylene film or a polyethylene film is laminated on the heat-softening layer.

In the transfer image forming method of the present invention, the image forming material is imagewise exposed and then developed to form a colored image, which is transferred onto an image receiving sheet to form a transferred image. Furthermore, by overlapping the image surface of the image-receiving sheet with the image thus obtained and the surface of the transfer material, such as white art paper, and performing a similar image transfer, a color proof for printing, for example, can be obtained. Obtainable.

Image exposure of the image forming material can be carried out by image exposure through a conventional color separation mask or the like.

Furthermore, any developer can be used as long as it has a developing action to develop the material to be processed. Preferably, a developer containing an alkaline agent and an anionic surfactant is used.

Usable alkaline agents include (1) sodium silicate, potassium silicate, potassium hydroxide, sodium hydroxide, lithium hydroxide, dibasic or tribasic sodium or ammonium phosphate, sodium metasilicate, sodium carbonate, ammonia; (2) mono-, di-, or trimethylamine;
Organic amine compounds such as mono-, di-, or triethylamine, mono- or di-isopropylamine, n-butylamine, mono-, di-, or triethanolamine, mono-, di-, or triisopropanolamine, ethyleneimine, ethylenediimine, etc. It will be done.

In addition, as anionic surfactants that can be used, (1)
Higher alcohol sulfate esters (e.g., sodium salt of lauryl alcohol sulfate, ammonium salt of octyl alcohol sulfate, ammonium salt of lauryl alcohol sulfate, sulfonic sodium alkyl sulfate, etc.), (2) Aliphatic alcohol phosphoric acid Ester salt! (for example,
(3) Alkylaryl sulfonic acid salts (eg, dodecylbenzenesulfone, acid sodium salt, isoprobylnafucrenesulfonic acid sodium salt).

dinafucrene sulfonic acid sodium salt, metanitrobenzene sulfonic acid sodium salt, etc.) (4) Alkylamide sulfonic acid salts (5) Sulfonic acid salts of dil aliphatic esters (e.g. sodium sulfosuccinate dioctyl ester, sodium dihexyl sulfosuccinate) esters, etc.) (6) Formaldehyde condensates of alkylnaphthalene sulfonates (for example, formaldehyde condensates of sodium dibutyl-phthalenesulfonate, etc.).

The alkaline agent and anionic surfactant can be used in any combination.

〔Example〕

Examples of the present invention and comparative examples will be described below.

It should be noted that, as a matter of course, the present invention is not limited only to the embodiments described below, but can take various forms.

Example 1 A polyethylene terephthalate film with a thickness of 75 μm was used as a support, and a polypropylene film with a thickness of 30 μm (Torephan 3931 manufactured by Toshi Co., Ltd.) was laminated thereon by a dry lamination method to obtain a support having a releasable surface. A colored recording layer dispersion having the following composition was applied onto the surface of the polypropylene film of the support using a wire bar.
By coating and drying to a dry film thickness of 1 μm, colored image forming materials of four colors each having a colored recording layer having a photosensitive composition were prepared.

(Colored recording layer dispersion liquid composition) t-Butylphenol-nattoquinone-1,2-diazide sulfonic acid ester 0.616 g Vinyl acetate-Vinyl versatate-Vinyl laurate-Crotonic acid (55; 20:20:5 parts by weight ) Copolymer, 3S4
to M N =32.000 MW=72. OOO The following pigments The following amounts Ethyl cellosolve 39.6 g Fluorine surfactant (manufactured by 3M, FC-430) 0.25
Dish material black: Carbon black MA-100 (manufactured by Mitsubishi Kasei) 0.99g cyan Nidianin Blue 4920 (manufactured by Dainichiseika) 0.55g Mazenk: Seika First Carmine 1483 (manufactured by Dainichiseika) 0.68g yellow :
Seiryoku Fast Yellow H-7055 (manufactured by Dainichiseika) 0.68 g Obtained 4
A color separation mesh positive film of each color was superimposed on the side of the colored recording layer side of the colored image forming material, imagewise exposed for 60 seconds from a distance of 50 CI 11 using a 4:1 metal halide lamp, and immersed in the following developer for 30 seconds. Development was performed by doing this to form a four-color colored image.

(Developer) NazCO, 15g Surfactant (Perex NBL manufactured by Kao Atlas Co., Ltd.) 50g Distilled water 1000g
A coating solution having the following composition was applied and dried on a support (polyethylene terephthalate film) similar to that used for the above image forming material to form a heat-softened layer having a dry film thickness of 10 μm.

(Coating liquid for heat-softening layer) Modified polypropylene solution solid content concentration 20-t% (Product name: UNISTOL Q manufactured by Mitsui Petrochemicals) Next, a release layer solution with the following composition was applied on the heat-softening layer to a dry film thickness. is 1μ
It was applied to a thickness of m.

(Release layer solution) Product name: Si coat 900A solution (manufactured by Taisei Kagaku Co., Ltd.) Solid content concentration: 30wt% This was heat-cured at 120°C for 3 minutes to form an image-receiving sheet having a release layer and a heat-softening layer. Manufactured.

The obtained image-receiving sheet and the image surface of the colored image-forming material on which the black image was formed were positioned and overlapped using register pins, and then heated between a pair of heated nip rolls under heating conditions of 5 kg/cn. After passing at a speed of 50 cm/min, the support of the colored image forming material was peeled off.

Peeling was performed easily, and only the black image area was transferred onto the image-receiving sheet.

Next, the same operation as described above was repeated using a colored image forming material on which yellow, magenta, and cyan images were formed on the image receiving sheet onto which only the black color image area was transferred, and each color image was changed into a colored image. A color image was obtained which was completely transferred from the forming material onto the image receiving sheet and had colors similar to the original image with the left and right sides reversed.

Furthermore, when the image surface of the image-receiving sheet having the four-color transferred image obtained in this manner was superimposed on the surface of white art paper and the same transfer as described above was performed, only the image area was on the surface of the white art paper. was transferred, and the finished product was very similar to the actual print. Moreover, this color image did not have excessive gloss and did not require matte processing.

Furthermore, the adhesion of the image to the art paper was also excellent.

Example 2 In the same manner as in Example 1, a support having a releasable surface was prepared by laminating a polypropylene film (Hilefan 3931 manufactured by Toshi Co., Ltd.) and a polyethylene terephthalate film.

Next, a colored recording layer dispersion having the following composition was coated using a wire bar so that the dry film thickness was 1 tIm, and dried to prepare a four-color colored image forming material having a colored recording layer.

(Liquid preparation table) Black Cyan Magenta IIU- Copolymer of benzyl methacrylate and methacrylic acid 60 60 60 60 (Group B A/M
A.73/27 mole ratio) Pentaerythritol
43.2 43.2 43.2
43.2 Tetraacrylate Michler's Ketone 0.41
0.41 0.41 0.41 Benzophenone 2.54 2.54
2.54 2.54 paramethoxyphenol
0.12 0.12 0.12
0.12 methyl cellosolve
1000 1000 1000 1000 (face
(Material) Kahnenbrafuku 150 (manufactured by Mitsubishi Kasei) Chrome Phthalp 8-4GN (manufactured by Ciba Geigy) Chrome Phthalref FA (manufactured by Ciba Geigy) RiU Mokhtar Ie U-8G (manufactured by Ciba Geigy) 19.8 11.0 13.6 13.6 Further coloring A solution having the following composition was applied as an overcoat layer on the recording layer to a dry film thickness of 0.3 μm.

Polyvinyl alcohol (Nippon Gosei Kagaku Kogyo GL-05) 60 parts Distilled water 970 parts Methanol 30 parts The obtained four-color image forming material was superimposed on a color separation negative mask for each color,
After imagewise exposure from a distance of 50 cm using a 3kW metal halide lamp, development was carried out by soaking at 35°C for 20 seconds using a 3-fold dilution of 5DN-21 (Conical S plate developer, manufactured by Konica Corporation) to develop four colors. A color image was obtained.

Further, using a polypropylene film similar to the above-mentioned image forming material as a support, a coating liquid having the following composition is applied thereon.
It was dried to form a heat-softened layer having a dry film thickness of 10 μm.

(Thermal softening layer coating solution) Product name: Zaixen AC Solid content concentration 24.9 wt% (ethylene-acrylic acid copolymer, manufactured by Seitetsu Kagaku Co., Ltd.) Next, a release layer solution having the following composition was applied onto the heat softening layer as a dry film. The coating was applied to a thickness of 1 μm.

(Release layer solution) Product name: Chemipearl S-100 Solid content concentration 27-t% (Ionomer resin manufactured by Mitsui Petrochemicals) As a result,
An image receiving sheet having a release layer and a heat softening layer was manufactured.

The subsequent processing was carried out in the same manner as in Example 1, and when the image receiving sheet having the four-color transferred image and the white art paper were overlapped and transferred, only the image portion was transferred to the surface of the white art paper. The finished product was very similar to the actual print. Moreover, this color image did not have excessive gloss and did not require matte processing.

Example 3.4 A transferred image was formed in exactly the same manner as in Example 1.2, except that high-quality paper with large irregularities was used as the transfer paper instead of art paper. As a result, as in Examples 1 and 2, a good transferred image was obtained. The image forming material of the present invention is extremely effective even when a transfer material having an uneven surface is used as in this example.

Comparative Example 1 Four colored image forming materials were prepared in the same manner as in Example 1, and further exposed and developed in the same manner as in Example 1 to form colored images in four colors.

Here, JP-A No. 5
An image-receiving sheet was manufactured by applying a coating liquid having the following composition described in No. 9-97140 and drying to provide an image-receiving layer having a dry thickness of 20 μm.

The obtained image-receiving sheet and the image surface of the colored image-forming material on which the black image was formed were positioned and overlapped using register pins, and then placed between a pair of heated nip rolls under a pressure of 5 kg/ci11. After passing at a speed of 50 cm/min, the support of the colored image forming material was peeled off.

Peeling was performed easily, and only the black image area was transferred onto the image-receiving sheet.

Next, yellow, magenta, and diene images were transferred onto the image-receiving sheet onto which only the black color image area had been transferred, to obtain a color image on the image-receiving sheet having the same colors as the original image with the left and right sides reversed.

The image-receiving sheet having the four-color transferred image obtained in this way and white art paper were superimposed and passed between a pair of heated nip rolls at a speed of 50 cm/min under a pressure of 5 kg/ci. After passing through the film, post-exposure was performed for 60 seconds using a 4kW metal halide lamp from a distance of 50C11, and the support of the image-receiving sheet was peeled off to obtain a four-color transferred image on white art paper.

The resulting transferred image was entirely covered with a polymer film and had excessive gloss. Therefore, a matting process is required, and the matting process has the disadvantage that the contrast of the image decreases.

Comparative Example 2 A transferred image was formed in exactly the same manner as in Comparative Example 1, except that high quality paper with large irregularities was used instead of art paper as the transfer paper. As a result, an image with even worse transfer than Comparative Example 1 was obtained.

〔Effect of the invention〕

As described above, the transfer image forming method of the present invention does not require post-exposure and can transfer a good image at a relatively low temperature by using an image receiving sheet having a release layer and a heat softening layer. be. Therefore, there is no risk of image misalignment (registration mark misalignment), and an image that is transferred only and not covered with a polymer film can be obtained. Therefore, even when used as a color proof for proofing, an image that is extremely similar to the actual printed matter can be obtained. Obtainable. Furthermore, it has good adhesion even to uneven transfer materials, and excellent transferred images can be obtained.

Special permission Out wish Man Koni Ka Co., Ltd. same Mitsubishi Kasei Corporation

Claims (1)

[Claims] 1. An image-forming material comprising a colored recording layer containing a photosensitive composition coated on a support having a releasable surface is imagewise exposed and then developed to produce a colored image. and transfer it onto an image receiving sheet to form a transferred image, wherein the image receiving sheet is provided with a heat softening layer and a release layer formed in this order on a support. A transfer image forming method characterized by: