JPH04186354A - Copying image forming material - Google Patents

Abstract

PURPOSE:To prevent the adhesion of the image forming materials by installing a thermal softening mold separating layer and a photosensitive coloring recording layer in this order on one surface of a supporting body and installing a back surface processing layer having a specific critical surface tension on the other surface of the supporting body. CONSTITUTION:A thermal softening mold separating layer and a photosensitive coloring recording layer are installed in this order on one surface of a supporting body, and a back surface processing layer having a critical surface tension of 31 dyne/cm or less is installed on the other surface of the supporting body. As for the back surface processing layer, a separating mold layer is formed on the supporting body from the thermal softening layer, and a coloring photosensitive layer is formed on the mold separating layer. The thermal softening layer is constituted of e.g., vinyl acetate - ethylene copolymer. Accordingly, generation of blocking is prevented even in case of superposition, and handling is facilitated, and a copying image similar to a printed article can be obtained.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a transfer image-forming material, and particularly to a transfer image-forming material having a heat-softening layer, a release layer, and a photosensitive colored recording layer on a support. The present invention can be used, for example, as a color proof for color proofing in color printing, and in this case, in particular, by directly transferring only the colored image to the transfer material, a transferred image that is similar to the printed material can be obtained. Can provide color proof. Background of the Invention Transfer image forming materials having a photosensitive colored recording layer on a support generally obtain a transferred image by transferring an image formed on the colored recording layer to a transfer material by transfer such as thermal transfer. Therefore, the colored recording layer itself usually has a transfer function. For this reason, if the colored recording layer side (front side) of an image forming material is in close contact with the support side (back side) of another image forming material, so-called blocking occurs, where both sides stick together. For example, image transfer due to heat. Even if the colored recording layer has the property of being able to absorb light, blocking will occur if the above-mentioned close contact is maintained at room temperature for a long period of time. This kind of pro-king is
For example, it may occur during winding during the production of transfer image forming materials. To prevent this blocking,
Conventionally, when producing a transfer image forming material, a mount or a protective film was sandwiched between the material and the material was wound up. Therefore, in the prior art, there were various problems associated with the occurrence of blocking, such as the special need for a mount and a protective film, and the complicated winding operation. In addition, transfer image forming materials are exposed on the back side when it is desired to obtain a normal image, and at this time, vacuum adhesion is generally applied on the back side (the side opposite to the photosensitive colored recording layer), so this vacuum adhesion must be good. is desired. [Object of the Invention] The present invention aims to solve the above-mentioned problems, and is capable of preventing adhesion (bronching) of image forming materials to each other, and therefore makes it possible to use interleaf paper or a protective film when winding up during manufacturing. It is an object of the present invention to provide a transfer image forming material which can be constructed so as to eliminate the need for such materials and also improve vacuum adhesion.

[Structure and operation of the invention]

In the transfer image forming material of the present invention, a heat-softening release layer and a photosensitive colored recording layer are provided in this order on one side of the support (hereinafter referred to as the front surface), and the other side of the support (hereinafter referred to as the back side or The critical surface tension on the back surface (referred to as the back surface) is 31 dyne/c.
It is configured by providing a back surface treatment layer of not more than m, and this configuration achieves the above object. According to the present invention, by having the above-mentioned structure and providing a back treatment layer in step 5, it is possible to significantly suppress the occurrence of bronking, and it is possible to achieve good winding without using interleaving paper or a protective film during manufacturing. It became possible to do this. Although the details of the action of the present invention are unknown, it is possible to exhibit a significant blocking suppressing effect when the critical surface tension is below 31 dyne/cm. By providing such a backside treatment layer, it was possible to improve the vacuum adhesion during exposure by incorporating a matting agent into the treatment layer, which was an unexpected effect. . That is, when a transfer image forming material is transferred as a normal image, it is necessary to expose the back side to light, and at this time, it is desired that the back side has good vacuum adhesion, but according to the present invention, It is easy to create a structure that improves vacuum adhesion. The present invention will be explained in more detail below. The transfer image forming material of the present invention is formed by providing a heat-softening release layer and a photosensitive colored recording layer on one side (surface) of a support. The support for constructing the imaging material may be comprised of any material. Transparent supports are generally used when back exposure is required. As the support, a polyester film, particularly a polyethylene terephthalate film, especially a two-wheel stretched polyethylene terephthalate film is preferred from the viewpoint of dimensional stability against water and heat. In addition, acetate film, polyvinyl chloride film, polystyrene film, and polypropylene film can also be preferably used. In the image forming material of the present invention, a heat-softening release layer is provided on the surface of the support. In the present invention, the heat-softening release layer is a general term for a layer functioning as a heat-softening layer and/or a layer functioning as a release layer, in which a colored image formed on a support is transferred to a transfer material. In this case, it is a general term for those provided so that the colored image can be easily peeled off from the support. For example, a layer that facilitates the peeling by being softened by heat (referred to as a heat-softened layer), or a layer formed by releasing the support surface with an oil-repellent substance (referred to as a mold release treatment layer) It is a concept that includes . For example, when carrying out the present invention, a release layer is provided on the support by a heat-softening layer (it is preferable that a release treatment layer is further formed thereon), and a colored photosensitive layer is formed on this. It can take a structure. Such a heat softening layer can be made of, for example, vinyl acetate-ethylene copolymer. The release treatment layer is made of, for example, silicone resin, fluorine resin, polyethylene, polypropylene ethylene-α-olefin copolymer, propylene-α-olefin copolymer,
Ethylene-propylene copolymer, ethylene-propylene-diene copolymer, ethylene-acrylic acid copolymer,
It can be formed from ethylene-vinyl acetate copolymer, ionomer resin, wax, nylon, polyamide resin such as copolymerized nylon, and the like. Furthermore, silicone resin or fluorine resin may be added to melamine resin or polyacrylic acid ester urethane resin. In addition, since polypropylene films, polyethylene films, etc., exhibit good mold release properties without special mold release treatment, a preferred embodiment is to provide a polypropylene layer or a polyethylene layer thinner than the thickness of the support for mold release. 9 layers of polypropylene on the support, which can be a layer of
Alternatively, the method for forming a polyethylene layer is as follows: (1) Using a solution of polyvinyl acetate, polyvinyl chloride, epoxy resin, polyurethane resin, natural rubber, synthetic rubber, etc. dissolved in an organic solvent as an adhesive, After applying these adhesives and drying them by hot air or heating, a polypropylene film or a polyethylene film is layered and pressed under heat to laminate.
So-called dry lamination method; (2) Using a copolymer of ethylene and vinyl acetate, a copolymer of ethylene and acrylic ester, polyamide resin, petroleum resin, rosin, wax, or a mixture thereof as an adhesive, these adhesives After applying the material onto a support by a doctor blade method, roll coating method, gravure method, reverse roll method, etc. while keeping it in a molten state by heating it as it is,
The so-called hot-melt lamination method, in which polypropylene or polyethylene films are immediately laminated together and laminated by heating at a high temperature if necessary and then cooling; (3) The polypropylene or polyethylene is kept in a molten state and then extruded. This is the so-called extrusion lamination method, in which the film is extruded into a film, and while it is still in a molten state, a support is bonded and laminated; Examples include a so-called coextrusion method in which a polypropylene layer or a polyethylene layer is formed on a support film by multiple moldings using polypropylene or polyethylene in a molten state. The thickness of the release treatment layer is suitably in the range of 0.01 to 30 μm, particularly preferably in the range of 0.1 to 5 μm. The thermosoftening layer has a property of softening at the temperature during thermal transfer, and can be formed from a thermoplastic resin. The thermoplastic resin has a softening point of -30°C to 150°C.
C is preferred. The softening point temperature referred to here is VI
This is the value shown by the CAT softening point or the ring and ball method. In the present invention, specifically, the following resins can be mentioned as preferred resins. 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. Vinylidene chloride 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 derivatives, cellulose acetate [phthalate, cellulose acetate succinate. Sea rank @ wax. The heat-softening layer can be provided on the support using a known method. The thickness of the heat softening layer is preferably in the range of 1 to 50 μm, particularly preferably in the range of 5 to 30 μm. The above-mentioned release treatment layer can also be provided on the heat softening layer,
This method involves applying a solution or an emulsion of the release treatment layer forming resin dissolved in an organic solvent onto the heat-softening layer, and a polypropylene film.
Alternatively, a method of laminating a polyethylene film on a heat-softening layer can be mentioned. Next, the photosensitive colored recording layer provided on the surface of the support above the heat-softening release layer (on the opposite side from the support) will be described. The photosensitive colored recording layer may be formed of one layer or two or more layers. In the case of two or more layers, the photosensitive layer containing the photosensitive composition containing the photoreceptor and the colored layer containing the colorant may be separate layers. The margin colored recording layer below may contain a colorant for forming a colored image, and such colorants include various dyes,
Pigments can be used. In particular, when used for color proofing, pigments and dyes with tones matching the normal colors required therein, ie, yellow, magenta, cyan, and black, are generally required. Also, when used in color filters, blue,
Green and red pigments and dyes may also be required. Other metal powders, white pigments, fluorescent pigments, etc. can also be used. When the imaging material of the present invention is applied to, for example, a color proof for color image proofing or other colored imaging materials, many pigments and dyes known in the art may optionally be used, such as the following: I can do it. Below are some examples of various pigments and dyes known in the art. These are organic pigments or dyes such as Ab-based, phthalocyanine-based, quinacridone-based, anthraquinone-based, indigo-based, and methine-based pigments, or inorganic pigments, and some specific examples of these are described below. (C,1, means color index). Lemon Chrome Yellow M35 (C, [, 77603
) Medium Chrome Yellow (C, [,77600)
Molybdate Orange (C, 1,77605) Milori Blue 671 (C, 1,77510)
Seicalite Blue (C, 1,74200) Seicalite Rose (C, 1,45160:
1) Seiki Light Magenta (C, 1,4517
0:2) Seiryoku Light Blue (C, 1,425
95:2) Seicalite High Orient B800 (C, 1,42535:2) Seiriki First Lake Red CZ A665 (C, 1
, 15585: 1) Seiriki First Lesotho LR116 (c, r, 15630: 1) Seiriki First Carmine 6 B 1488 (C, 1,
15850:1) Seika First Red 8040 (C,1,15865: l) Seiriki Fast Yellow 10GH (C,1,11710) Seika First Yellow GH (c, r, 11680) Seika First Yellow 2015 (C,1,11741 ) Seiriki First Yellow A-3 (C, 1, 11737) Seiriki First Yellow 2300 (C, 1, 21090) Seika First Yellow 2200 (C, 1, 21095) Seiriki First Yellow 2400 (C, [21105> Seiriki First Yellow 2600 (C, 1, 21100) Seika First Yellow 2500 (C, 1, 21096) Seiriki First Yellow 2720 (C, 1, 21108) Seiriki First Orange 2900 (C, [, 21160) Seika First Orange 900 (C , 1, 21110) Seiriki First Orange 3044 (C, 1, 12075) Seiriki First Renodo 930 (B) (C, 1, 21120) Seiriki First Scalen) Gconc (C, 1, 1
2315) Seika First Carmine 3840 (C,1,12490) Seika First Carmine 3870 (C,1,12485) Seika Fast Carmine RK-1 (C,1,12317) Seika First Violet FR (C,1,12322) Chromofine Blue 4920 (C, 1,7416
0) Chromofine Green 2GO (C, 1, 74260) Chromofine Yellow 5910 (C, 1, 2003
5) Chromofine Orange 6726 (C, 1, not 1isted,) Chromofine Greent 6750 (C, 1, not 1isted,) Chromofine Red 6820 (C, 1, 4650
0) Chromofine Violet (C, 1, 51, 31
9) Shimla Fast Yellow 8GTF (C, 1, 21105) Shimla First Yellow 4186 (C, 1, 11767) Shimla Fast Yellow 4193G (C, 1, 21) manufactured by Dainichiseika
100) Shimla Fast Yellow GHK-N4 (C9I, 2
1090) Shimla Fast Yellow GTF230T (C, 1,
not 1isted, ) Zimler Fast Yellow RF (C, 1, 21096) Shimler Fast Yellow 4181 (C, 1, 21108) First Gen Super Yellow GRO (C, 1, 56
280) Shimla Fast Virazolone Orange G (C, 1, 2
1110) Shimla First Orange■ (C,1,21160) Shimla First Orange 4183H (C,1,11
780) Shimla Lake Red Cconc 130 (C, 1, 1
5585:1) Shimla Neotall Red 2BY (C,1,15565:l) Shimla Red 2BS (C,1,15865:1) First Gen Super Red 2Y (C,1,73905) First Gen Super Red 7083 Y (C ,1,
46500) Shimla Red 3013 (C, 1,1586
3:2) Nmura Brilliant Carmine 6B246 (C
, 1,15850:1) First Gen Super Magenta R (C, 1,73915) First Gen Super Violet RNS (C, 1,
51319) First Gen Super Blue 6016 (C, 1,69
800) First Gen Blue BSF-A (C, 1,74160) First Gen Blue TGR-L (C, 1,74160) First Gen Blue 7S (C, 1,74260
) First Gen Green 2YK (C, 1,74265) Oriental Yellow o-GT manufactured by Dainippon Ink ■ (C, 111680) Victoria Pure Blue (C, 1,42595) Lionor Red 7B4401 (C, [, 15830)
Lionollet 3901 (C, 1,121
20) Lionollet F B 5500 (C, l
, 1249Q) Lionorette F B K
(C, 1, 12490) 7100 Lionor Yellow (C, 1, 21096) Lionor Yellow o-F
GG-3 (C, 1, 21127) Lionol Yellow N B R (C, 1, 21108)
Lionor Yellow-1806-G (C, 1, 2112
7) Lionor Red 28K (C, 1,1586
5:4) st/-Louis xo-K -50(C,1,13
960) Lionol Yellow K-2R (C, 1139
55) Lionor Yellow FGG-3 (C, 1, 21127) Lionor Blue 7210-V (C, 1, 7416
0) Lionor Blue SM (C, 1,7416
0) Lionor Blue F C-7330 (C, 1,74
160) Lionol Blue SP G-8 (C, 1,
74160) Lionor Blue E S P -S (C
, 1,74160) Lionor Blue E S (
C, 1,7416'O) Lionorg +) -7B -
201 (C, r, 74260) Lionol Green Y
-101 (C, 1,74260) Lionor Green 6
Y-501 (C, T, 74160) Lionogen Yellow GF (C, 1,70600
) Lionogen Yellow 3G-F (C, 1, not 1isted,) Lionogen Yellow RX -F (C, 1, 66280
) Lionogen Orange R-F (C, 1,1178
0) Lionogen Orange G R-F (C, 1,711
05) Lionogenblau 7R-F (C, 1,125
10) Lionogen Red Y-F (C,1,4
6500) Lionogen Red 6B-F (C,1,
46500) Lionogen Red CD-F (C,1
, 53900) Lionogen Magenta R-F (C,
1,73915) Lionogen Violet RL-F (C, 1,51319) Lionogen Blue RF (C, 1,69800
) Lionogen Blue R3-F (C, 1,69800
) or more Auramine manufactured by Toyo Ink ■ (C, 1,41000)
Carotene brilliant flavin (C, 1, beige, ri 13) Rhodamine 6 C, CP (C, 1,451
60) Rhodamine B (C,1,45
170) Safranin OK 70:100 (C,
1,50240) Erioglaucine X (C,
1,42080) First Black HB' (
C, 1,26150) Benzidine Yellow 4T-564
D (C, 1, 21095) Mitsubishi Carbon Black MA-400 Mitsubishi Carbon Blank #30, #40, #50 In the practice of the present invention, the content of the colorant in the colored photosensitive layer is determined according to the target optical density and coloring. It can be determined by taking into consideration the removability of the photosensitive layer with respect to a developer. In the present invention, the content of the colorant is preferably in the range of 5 to 40% by weight, particularly preferably in the range of 10 to 30% by weight. In the practice of the present invention, two or more types of pigments and dyes used as colorants can be used as a mixture. Next, a photoreceptor that can be used to impart photosensitivity to the photosensitive colored recording layer will be described. Various photosensitive materials can be used as the photoreceptor. For example, when a photoreceptor is irradiated with actinic rays, its molecular structure undergoes a chemical change in a short period of time, and its solubility in a solvent changes. includes all compounds such as monomers, prepolymers, or polymers whose exposed or unexposed portions are dissolved and removed. Examples of photoreceptors that can be used include photocrosslinkable photosensitive resins, such as those made by esterifying polyvinyl alcohol with cinnamic acid, which are so-called negative-positive type photoreceptors that have reduced correction in the exposed area. There are systems in which diazonium salts and their condensates are mixed with polyvinyl alcohol, polyvinylpyrrolidone, polyacrylamide, etc., and systems in which aromatic azide compounds are used as photocrosslinking agents and mixed with binders such as cyclized rubber. Photosensitive resins using radical polymerization or photoionic polymerization can also be used. Furthermore, as a so-called positive-positive type composition that increases the solubility of the exposed area, there is, for example, a photosensitive composition containing 0-quinonediazide as a photosensitizer, and specifically, 1.2-
Henzoquinone diazito 4-sulfonyl chloride, 1
．． Preferably used are compounds obtained by condensing 2-naphthoquinonediazide-4-sulfonyl chloride, 112-naphthoquinonediazide-5-sulfonyl chloride, 1,2-naphthoquinonediazide-6-sulfonyl chloride and a compound containing a hydroxyl group and/or an amino group. . Examples of the hydroxyl group-containing compounds include trihydroxybenzophenone, hydroxyanthraquinone, bisphenol A1 phenol novolak resin, resorcin benzaldehyde condensation resin, and pyrogallol acetone condensation resin. Examples of amino group-containing compounds include aniline, P-aminodiphenylamine, P-aminobenzophenone, 4,4-diaminobenzophenone, and 4°4-diaminodiphenylamine. Regarding the above 0-quinonediazide compound, J, K
“Light 5-ensitive Sys” written by osar
tem'' (Wiley & 5ons, New Year
K. K., 1965) and Powdered Ice and Dr. It Photosensitive Polymer (
Kodansha, 1977). In addition, positive-positive type products include: ■ a compound that can generate an acid when irradiated with actinic rays, ■ a compound that has at least one bond that can be decomposed by an acid, and ■ a novolak resin that contains two or three different types of phenols. A photosensitive composition can also be used. In the present invention, the content of the photoreceptor in the colored photosensitive layer is preferably 5 to 80% by weight.Whether the photosensitive colored recording layer is one layer or divided into two or more layers, a binder is used. As such a binder, a polymer compound that is film-forming and solvent-soluble, preferably soluble or swellable 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 formula (I) in its molecular structure can be mentioned. General Formula (1) In General Formula (1), R11 and Rlt each independently represent a hydrogen atom, an alkyl group, or a carboxylic acid group. R1
3 is a hydrogen atom, a halogen atom or an alkyl group, RI4
represents a hydrogen atom, an alkyl group, a phenyl group or an aralkyl group. X connects with nitrogen atom and aromatic carbon atom 2
represents a valent organic group. n is 0 or l. Y represents a phenylene group which may have a substituent or a naphthylene group which may have a substituent. Specifically, monomers forming the structural unit represented by formula (I) above include, for example, 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 0-2m- or P-hydroxyphenyl (meth)acrylate monomers, N-
(4-hydroxyphenyl)-(meth)acrylamide monomer, more preferably L< is N-(4-hydroxyphenyl)-(meth)acrylamide monomer. In the present invention, it is preferable to use a copolymer of a monomer forming the structure represented by the general formula (1) and the following Moatsumer etc. as a binder. Wall Acrylonitrile: CH,=C:BE IS Qualkyl acrylate: CH,=C-C-OR" ○ IS Acrylic acid: CHZ-C-oH In each of the above formulas, R-5 is a hydrogen atom, an alkyl group , or represents a halogen atom, and R16 represents an alkyl group, a phenyl group, or a naphthyl group. When using the above copolymer, the copolymer has an aromatic hydroxyl group represented by the general formula (1). The ratio of the groups is preferably 1 to 30 mol %.The ratio of the acrylonitriles in the copolymer is preferably 0 to 50 mol %, and further considering the developability, 5 to 30 mol %. 40 mol% is preferable.The proportion of structural units formed from the above-mentioned alkyl acrylates is preferably 50 to 95 mol% from the viewpoint of developability with a low alkaline aqueous solution, and more preferably 60 to 95 mol%. % gives the most suitable developability.In addition to the above-mentioned structural units, the polymer compound that is the above-mentioned copolymer contains the above-mentioned acrylic acid such as acrylic acid or methacrylic acid for the purpose of finely adjusting the development and imageability. Acids may be copolymerized to form a structural unit. In this case, the proportion of the copolymer of acrylic acids in the polymer compound is 0, considering the development latitude.
~20 mol% is preferred, and 0-10 mol% is most preferred. The weight average molecular weight of such a polymer compound is preferably i,ooo to 100,000, more preferably 1,000 in terms of developability or resolution when a low alkaline aqueous solution is used as a developer. A range of .about.30,000 is preferred. These polymer compounds can be synthesized by a well-known copolymerization method. Specific examples of such polymer compounds include copolymers having the following structure. CH3 (weight average molecular weight: t, ooo ~ 30,000)
1: m: n=(1-25): (5-40)
: (50-95) or less margin In addition, in the image forming material of the present invention, as the binder constituting the colored photosensitive layer, a polymer compound having a carboxylic acid vinyl ester polymerized unit represented by the following formula in its molecular structure is also preferable. Can be used. RCOOCH=CH. However, R represents an alkyl group having 1 to 17 carbon atoms. Any polymer compound having the above structure can be used, but as the carboxylic acid vinyl ester monomer for constructing the polymerized unit represented by the above formula, the following examples are preferred. The name and chemical formula are also shown. ■Vinyl acetate CH3COOCH= CHz ■Vinyl propionate CH3CHzCOOCH=CH2 ■Vinyl butyrate CH3 (C82) zcOOcH= CH
z■Vinyl pivalate (C)+3) zccOO
cH=c)Iz■Bivinyl caproate CH4Hz)4
cOOcH=cHz■ Vinyl caprylate C1 (3(C)
12) 6COOC1 (=CH2■ Vinyl capric acid C1
h(CHz)scOOcH=clb■vinyl laurate C)! 3(CHz)+oCOOCH=CH2■Vinyl myristate CI(3(CH2)+□COOCH=
CH. [Phase] Vinyl palmitate CH3 (CH2) 14
cOOcH=cH20stearic acid CH
3(CHzn, , C00C)l = C)i 2@vinyl versatility 1ls R' -C-C00CH= CH2 (R+, R2 are alkyl groups, and the sum of their carbon numbers is 7. That is, R1÷R As the carboxylic acid vinyl ester monomer (in the form of "=CJ,"), it is more preferable to use a carboxylic acid vinyl ester monomer having 1 to 4 carbon atoms in the main chain of the carboxylic acid.In particular,
Vinyl acetate is preferred. Note that the above R also includes an alkyl group having a substituent, that is, a vinyl ester of a substituted carboxylic acid is also included in the polymerization 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. Monomer units that can be used in combination with the polymerized units represented by the above-mentioned formulas include, for example, ethylenically unsaturated olefins such as ethylene, propylene, isobutylene, butadiene, and isoprene, such as styrene, α-methylstyrene, p - Styrenes such as methylstyrene and p-chlorostyrene, acrylic acids such as acrylic acid and methacrylic acid, unsaturated fat-fighting 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, α-methyl chloroacrylate, methyl methacrylate, and ethyl methacrylate; Nitriles such as acrylonitrile and methacrylonitrile; Amides such as acrylamide; e.g. acrylic anilide, p-chloroacrylanilide, m-nitroacrylanilide, m-methoxyacrylanilide, etc., such as methyl vinyl ether, ethyl vinyl ether, isobutyl vinyl ether,
Vinyl ethers such as β-chloroethyl vinyl ether, vinyl chloride, vinylidene chloride, vinylidene cyanide, such as l-methyl-1-methoxyethylene, 1°1-dimethoxyethylene, 1,2-dimethoxyethylene, 1.
l-dimethoxycarbonylethylene, l-methyl-1-
Ethylene derivatives such as ditroethylene, such as N-vinylpyrrole, N-vinylcarbazole,
There are vinyl monomers such as N-vinyl compounds such as N-vinylindole, N-hinylpyrrolidene, and N-vinylpyrrolidone. These vinyl monomers generally exist in a polymer compound with a structure in which unsaturated double bonds are cleaved. When using the polymer compound represented by the above-mentioned formula in the present invention, it is particularly preferable to use a polymer compound having a vinyl acetate polymerization unit in its molecular structure. Among them, those having 40 to 95-t% of vinyl acetate polymerization units and having a number average molecular weight (MN) of 1,000 to 1
00.000, weight average molecular weight (MW) is 5.0
00 to 500,000 is preferred. More preferably, vinyl acetate polymerized units (especially 40
~95-t%) and polymeric compounds having carboxylic acid vinyl ester polymerized units with a longer chain than vinyl acetate are preferred, especially those with a number average molecular weight (MN) of 2.000 to 60.0.
00, weight average molecular weight (MW) is 10,000 to 150
,000 is preferred. In the case of 2, it is copolymerized with vinyl acetate to form a polymer compound having vinyl acetate polymer units! As a marketer,
The monomer capable of forming a copolymer is arbitrary, and can be arbitrarily selected, for example, from among the monomers exemplified above. 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 ■Vinyl acetate-maleate ester ■Vinyl acetate-ethylene ■Vinyl acetate-vinyl carboxylate ester ■Vinyl acetate-styrene ■Vinyl acetate-crotonic acid ■Vinyl acetate-maleic acid ■Vinyl acetate-2-ethyl Hexyl acrylate ■ Vinyl acetate-2-ethylhexyl maleate [phase] Vinyl acetate-methyl vinyl ether ■ Hinylacetate-vinyl chloride @ vinyl acetate-N-hinylpyrrolitone ■ Vinyl acetate-vinyl propionate [phase] Vinyl acetate-vinyl pivalate ■ Vinyl acetate-versatic acid Vinyl [Phase] Vinyl acetate-Vinyl laurate ■Vinyl acetate-Vinyl stearate ■Vinyl acetate rhubasate-Ethylene [Phase] Vinyl acetate rhubasate-2-ethylhexyl acrylate [Phase] Vinyl acetate rhubasate Vinyl acid ~ Vinyl laurate ■ Vinyl acetate Rubersatic acid - Crotonic acid ■ Vinyl propionate Rubersatic acid Vinyl 0 Vinyl propionate - Vinyl versatate - Crotonic acid [Phase] Piparic acid - Vinyl stearate - Malein In the present invention, a novolac resin can also be used as a binder. Novolak resins are generally obtained by polycondensation of at least one type of phenol and an active carbonyl compound, and any of these novolak resins can be used. The above-mentioned phenols include all compounds in which at least one hydrogen atom bonded to an aromatic ring is substituted with a hydroxyl group, and specific examples of such phenols include, for example:
Phenol, 0-cresol, m-cresol, p-cresol, 3.5-xylenol, 2,4-xylenol, 2.5-xylenol, carvacrol, thymol, catechol, resorcinol, hydroquinone, pyrogallol, phloroglucin, alkyl a ( Number of carbon atoms: 1-8
) Substituted phenols and the like can be mentioned. The active carbonyl compounds include, for example, aldehydes and ketones, and specific examples include formaldehyde, acetaldehyde, benzaldehyde, acrolein, furfural, and acetone. The above-mentioned novolak resins include phenol formaldehyde novolak resin, m-cresol formaldehyde novolak resin, phenol/m-cresol/formaldehyde copolycondensate resin, phenol/p-cresol/formaldehyde copolycondensate resin, m-cresol/P -cresol/formaldehyde copolycondensate resin,
0-cresol/p-cresol/formaldehyde copolycondensate resin, phenol/0-cresol/m-cresol/formaldehyde copolycondensate resin, phenol/0-cresol/p-cresol/formaldehyde copolycondensate resin, phenol・m-cresol, p-cresol, formaldehyde copolycondensate resin, etc. can be mentioned. The preferred novolac resin is phenol formaldehyde novolak resin, and has a weight average molecular weight MW of 3500.
~500, and those with a number average molecular weight MN of 1000 to 200 are preferred. The molecular weight of the polymer compound in this specification, including the molecular weight of the Novolank resin, is measured by (1, PC (gel permeation chromatography). Calculation of number average molecular weight MN and weight average molecular weight MW. teeth,
Morio Tsuge, Tatsuya Miyabayashi, Masayuki Tanaka “Journal of the Chemical Society of Japan” 8
By the method described on pages 00 to 805 (1972),
The test shall be performed by leveling the peaks of the oligomer region (connecting 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. The principle of pyrolysis gas chromatography is
The equipment and experimental conditions are, for example, Journal of the Chemical Society of Japan, Tsuge:
New Experimental Chemistry Course” Volume 19, Polymer Chemistry (1:! 47
The method for qualitative analysis of novolak resins using pyrolysis gas chromatography is described in pages 4 to 485 (Maruzen, 1978), etc., and the method for qualitative analysis of novolac resins using pyrolysis gas chromatography is described in "Analytical Chemistry" Volume 18 by Morio Tsuge, Takashi Naka, and Masayuki Tanaka. , pp. 47-52 (1969). In the present invention, a novolac resin (component (b)
)) and a polymer compound (referred to as component (c)) having a carboxylic acid vinyl ester polymerized unit represented by the above general formula in its molecular structure, (
It is preferably contained in a weight ratio range of b)/(c) = 5/95 to 80/20. This range is preferable in terms of color reproducibility, thermal deformation (dimensional deviation), and color fastness. Component (b) (c
A particularly preferred ratio of ) is (b)/(c) = by weight
The range is IO/90 to 60/40. Further, in the present invention, other polymeric compounds that can be used as a binder for the colored recording layer include sulfoalkyl esters of (meth)acrylic acid (co)polymers;
Examples include vinyl acetal (co)polymers, vinyl ether (co)polymers, acrylamide (co)polymers, styrene (co)polymers, cellulose derivatives, and the like. The thickness of the colored recording layer in the image forming material of the present invention can be appropriately determined depending on the target optical density, the type and content of the colorant used in the colored recording layer, and the like. Within the allowable range, the thinner the colored photosensitive layer is, the higher the resolution and the better the image quality. Therefore,
The film thickness is preferably 0.1 g/TTf to 5 g/rrf
It is usually used within the range of The colored recording layer of the transfer image forming material of the present invention is generally formed by coating a colored photosensitive layer coating liquid containing a photoreceptor, a binder, and a coloring agent (pigment) on a support. can. Here, an organic solvent can be used as a solvent to constitute the coating liquid. In carrying out the present invention, any organic solvent can be used as the colored photosensitive layer coating solution, and for example, all of the various known organic solvents can be used. Examples of organic solvents that can be used include hydrocarbons such as n-hexane, cyclohexane, n-pentane, benzene, toluene, and xylene, methyl alcohol, ethyl alcohol, isopropyl alcohol, n-propyl alcohol, and t-butyl alcohol. , 5ec-butyl alcohol, isobutyl alcohol, n-butyl alcohol, alcohols such as 1-pentanol, 2-pentanol, 1-hexanol, acetone, cyclohexanone, methyl ethyl ketone, methyl-〇-propyl ketone,
Ketones such as methyl isopropyl ketone, methyl-0-butyl ketone, methyl isobutyl ketone, diethylene glycol monomethyl ether, diethylene glycol dimethyl ether, diethylene glycol monoethyl ether, methyl lactate, ethyl lactate, methyl propioate, methyl butyrate, ethyl acetate, etc. esters, nitriles such as acetonitrile and propionitrile, and others 1.
Examples include 4-dioxane, dimethylformamide, dimethyl sulfoxide, methylene chloride, chloroform, and carbon tetrachloride. Among these, aromatic hydrocarbons such as benzene, toluene, and xylene, ketones, and esters are preferably used, and particularly preferred are cyclohexanone, toluene, and methyl lactate. When carrying out the present invention, various organic acids and acid anhydrides can be contained in the colored recording layer. Examples of the organic acids that can be used include various known organic acids. Examples of such organic acids include, for example, the Chemical Handbook Basic Akebono 2 ■
(Maruzen 1966), pages 1054-1058, 22, all of the organic acids described can be mentioned. Examples of such organic acids include benzoic acid, adipic acid, azelaic acid, isophthalic acid, p-toluic acid, q-)ruic acid, β-ethylglutaric acid, m-oxybenzoic acid,
, 5-dimethylbenzoic acid, 3,4-dimethoxybenzoic acid, glyceric acid, glutaconic acid, glutaric acid, p-anisic acid, cinnamic acid, succinic acid, acetic acid, sebacic acid, β, β
-diethylglutaric acid, 1-cyclobutanedicarboxylic acid, 1,3-cyclobutanedicarboxylic acid, 1,3-cyclobutanedicarboxylic acid, 1,1-cyclopenkunedicarboxylic acid, 1.2-cyclopenkunedicarboxylic acid, 1.3 −
Cyclopentanedicarboxylic acid, β, β-dimethylglutaric acid, dimethylmalonic acid, α-tartaric acid, speric acid, terephthalic acid, pimelic acid, phthalic acid, fumaric acid, propionic acid, β~propylglutaric acid, β-propylmalonic acid ,β. β-methylpropylglutaric acid, mandelic acid, mesotartaric acid, methylmalonic acid, β-methylglutaric acid, malic acid, 1,1-cyclohexanedicarboxylic acid, 1,2-cyclohexanedicarboxylic acid, 1. 3-cyclohexanedicarboxylic acid, 1.4-cyclohexanedicarboxylic acid, cis-4-cyclohexene-1.2
, -dicarboxylic acid, stearic acid, erucic acid, undecenoic acid, lauric acid, butyric acid, n-capric acid, pelargonic acid, n-undecanoic acid, and the like. Other organic acids having an enol structure such as Meldrum's acid and ascorbic acid can also be preferably used. Among these, the organic acid preferably used has 1 to 5 carbon atoms.
These are carboxylic acids and dibasic acids having a carbon difference of , and more preferably acetic acid and glutaric acid. The proportion of the organic acid in the photosensitive layer is 0.05 to 10
Weight % is appropriate and preferred, more preferably 0.1~
5% by weight is suitable. The acid anhydride that can be used is arbitrary, and all known various acid anhydrides can be used, but cyclic acid anhydrides are preferable. Examples of such acid anhydrides include phthalic anhydride, tetrahydroanhydride, Phthalic acid, 3,6-nindooxy-Δ4-tetrahyphthalic anhydride, tetrachlorophthalic anhydride, glutaric anhydride, maleic anhydride, chloromaleic anhydride, α-phenylmaleic anhydride, succinic anhydride, pyromellitic acid, etc. can be mentioned. The proportion of the acid anhydride in the photosensitive layer is 0.05 to 1
0% by weight is appropriate and preferred, more preferably 0.1% by weight.
~5% by weight is suitable. In carrying out the present invention, a plasticity improving agent, a coating property improving agent, etc. may be added to the colored recording layer as required. Plasticizers include various low-molecular-weight compounds, such as phthalate esters, triphenyl phosphates, and maleate esters; coating properties improvers include surfactants, such as fluorosurfactants, ethyl cellulose polyalkylene ether, etc. Examples include nonionic activators represented by . When constituting the image forming material of the present invention, the colored recording layer can be divided into two layers: a colored layer made of a colorant and a binder, and a photosensitive layer made of a photosensitive composition. In this case, it does not matter which layer is placed on the support side. The imaging material of the present invention can be embodied as a color proof. In this case, the colored window light layer of the image-forming material is removed in an imagewise manner by imagewise exposure (development) to form a colored image. In the present invention, a heat-softening release layer is present between the support and the colored recording layer, and it is sufficient that at least one such layer is formed. The transfer image forming material of the present invention efficiently transfers an image onto a transfer material in the above-mentioned cases, and facilitates peeling off the support after image transfer. A back surface treatment layer having a critical surface tension of 31 dyne/cm or less is formed on the surface (back surface) opposite to the side on which the heat-softening mold release layer and the photosensitive colored recording layer are provided. It can be formed by treatment with a treatment agent. Examples of back treatment agents that can be used include the following: ■Copolymers of long-chain alkyl acrylates; for example, C)
Examples include copolymers of h=cHcOOc+5H3t and at least one of acrylic acid, methyl acrylate, acrylonitrile, and vinyl acetate. ■ Copolymer of long-chain alkyl acrylamide; for example, C
Examples include copolymers of Hz=C)lcONHc+aHst, acrylonitrile, and acrylic acid. ■Copolymers of long-chain alkyl maleates; for example, HOO
Examples include copolymers of CCH2=CHC00CI 11H37 and at least one of vinyl acetate, styrene, ethyl acrylate, vinylpyrrolidone, and the like. ■ Copolymers of long-chain alkyl itaconates; ■ Copolymers of long-chain alkyl allyl esters; for example, CHz=CHCH
copolymer of zOCOCItHys and maleic anhydride,
Alternatively, half-esterified or half-amidated ones can be mentioned. ■Copolymers of long-chain alkyl vinyl esters; for example, CH
A copolymer of z=CHOCOC+J*s and maleic anhydride can be mentioned. ■Copolymers of long-chain alkyl vinyl ethers; for example, C1
Examples include copolymers of h=CHOC+5lht and at least one of acrylic acid, maleic anhydride, acrylonitrile, vinyl acetate, and the like. ■Long-chain olefin polymers or copolymers; e.g. l-
Polymers of octadecene or copolymers of this with maleic anhydride can be mentioned. ■Polymer with polyisocyanate as a linking arm; for example,
TDI and C2□)14sN)IC,86NH2,C+
Mention may be made of dhsCOOCHzCHOHCHzOH, a polymer with any of the long-chain fatty esters of polyhydric alcohols. [Phase] Polyamide polyimide - Reaction product of natural polymers such as cellulose and cellulose derivatives, synthetic polymers such as polyvinyl alcohol, polyethyleneimine, copolymers of maleic anhydride and ethylene and vinyl compounds, and C+5zJCOCL C+5HzJCO, etc. . ■Perfluoroalkyl-containing polymers such as fluorine-containing vinyl-based polymers; For example, CHz=C(CH3)COOCthCsF+
I, CH, ・CHC00C2H4N(C2H5)S
OZC! 1HI7, C)12=c(CH3)OCOC
A polymer of H2N(C)13)SO□CJ+, also C
H2=C(CICOOCZ)1.111 (CJs)
5O2Cs)l, ? and CI,・DHCOOC+s
Examples include copolymers with H:+t. Furthermore,
C3N3(NO3) zN(CH3)So□C methylol compound with formaldevit, CgF17SOJ)l
cz) 14cOOcrch HCrClOH, a carbanate compound of PVA and C9F + qcHzNco, and the like. [Phase] Silicone derivative; For example, a vinyl silicone rubber grafted with diacetone acrylamide or vinyl acetate, a polysiloxane with a hydroxyl group at the end and a vinyl yarn thread grafted thereon, a polysiloxane. into (Si(CHri(OR)0)fl introduced by block polymerization, a condensate of α,ω-dihydroxypolydimethylsiloxane or triacetoxyvinylsilane and TDI, (CHiO)1siczHJHczHJIl
A prepolymer of z and TDI used in combination with phenol formaldehyde resin, a polyurethane synthesized from α,ω-polybutadiene glycol and MDI with methylhydrogen polysiloxane added, a copolymer of phenylmethylsiloxane and dimethylsiloxane , poly(vinyl)
N-octadecyl carbamate) and silicone with Ti (
Examples include those condensed with OR)n. ■C+JzsCOOCrC1z ・CrC1,,OH and hydroxyethyl cellulose, phenolic resin, PVA
Chromium-containing compounds such as those used in combination with polymers such as ■A combination of a long-chain alkyl low-molecular compound and a polymer such as urea-formaldehyde resin, or a low-adhesion polymer that does not contain a long-chain alkyl group (acrylonitrile, other vinyl-based, or acrylic-based compound polymer), or a combination of this and various resins. Among the above, compounds having a long-chain alkyl group (① to ①), perfluoroalkyl-containing polymers (@), and silicone derivatives (①) are preferred. In the back treatment, for example, a solution of the back treatment agent as described above (e.g., 0.1 to 10% solution) is applied to the substrate to be treated, and it is dried to form a solid content of about 0, oi to 1 g/m''. The substrate can be subjected to a pretreatment such as a corona discharge treatment, or an undercoat can be applied.In the present invention, the critical surface tension is 31 dyne/'c.
The critical surface tension is determined by measuring the surface of the object with a contact angle meter or by JIS K6768.
This can be determined by measuring the surface tension as determined by a wetting test with a formamide/ethyl cellosolve mixture as described in ('71). In carrying out the present invention, when the transfer image forming material is configured to be a positive type, backside exposure is generally required in order to obtain a normal image upon transfer after exposure and development. At that time, if the back surface treatment layer contains a matting agent, vacuum adhesion is improved. Such a backside treatment layer containing a matting agent can be formed by using a backside treatment agent containing a matting agent. When using a matting agent, it is preferable to use a polymer matting agent having an average particle size of 3.0 μm or more. Specific examples of polymeric capping agents that can be used include water-dispersible vinyl polymers such as polymethyl methacrylate, cellulose acetate propionate, starch, and the like. In particular, spherical water-dispersible vinyl polymers such as homopolymers of acrylic esters, such as methyl methacrylate, glycidyl acrylate, and glycidyl methacrylate, or copolymers of these acrylic esters with each other or with other vinyl heptamers. Matting agents are preferred. The image forming material of the present invention can be used in such a manner that an image area is formed by exposing and developing the material, and at least the formed image area is transferred to a transfer material to obtain a transferred image. The image forming material of the present invention can be exposed to appropriate light depending on the colored photosensitive layer, particularly depending on the photoreceptor, and then developed to obtain an image. 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, and lithium hydroxide. Sodium or ammonium salts of secondary or tertiary phosphates, sodium metasilicate, sodium carbonate. Inorganic alkaline agents such as ammonia, (2) Mono-, di-, or trimethylamine, mono-, di-,
or triethylamine, mono- or di-isopropylamine, n-butylamine, mono-, di- or triethanolamine, mono-, di- or triisopropylamine, ethyleneimine. Examples include organic amine compounds such as ethylenediimine. 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, sulfuric acid alkyl sulfate, etc.), (2) Salts of aliphatic alcohol phosphate esters (e.g.,
(3) Alkylaryl sulfonates (e.g., sodium dodecylbenzenesulfonate, isopropylnaphthalenesulfonate sodium salt, dinaphthalenesulfonate sodium salt, metanitrobenzenesulfonate sodium salt, etc.) (4) Alkylamide sulfonates C113 (5) Sulfonates of dibasic aliphatic esters (e.g. sodium sulfosuccinate dioctyl ester, sodium sulfosuccinate dihexyl ester, etc.) (6) Formaldehyde condensates of alkylnaphthalenesulfonates ( For example, a formaldehyde condensate of sodium dibutylnaphthalene sulfonate, etc.) can be mentioned. The alkaline agent and anionic surfactant can be used in any combination. All white below

【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 on one side of the film, a layer of ethylene-vinyl acetate copolymer resin with a thickness of 25 μm (EVAFLEX P-1405 manufactured by DuPont Mitsui Chemical Co., Ltd., hinyl acetate/
L/content 14% by weight, VICAT softening point 68°C),
A heat-softening mold release layer is formed by extrusion lamination, and a colored photosensitive layer dispersion having the following composition is applied onto the surface of the heat-softening mold release layer made of ethylene-vinyl acetate copolymer resin using a wire bar to form a dry film. It was coated to a thickness of 1.5 μm and dried at 90° C. for 5 minutes to form a photosensitive colored recording layer. Transfer imaging materials of four colors were prepared by dispersions using each corresponding pigment. Colored photosensitive layer dispersion: 0.01g (R material) Black 2-carpon black MA-100 (manufactured by Mitsubishi Kasei) 0.99g Cyan: Lionol Blue FG-7330 (manufactured by Toyo Ink) 0.55g Magenta: Lionol Red 68 FG-4219
X (manufactured by Toyo Ink) 0.68 g Yellow: NQ1206 Lionol Yellow (manufactured by Toyo Ink) 0.68 g or more of the polyethylene terephthalate film surface of the four-color transfer image forming material obtained, that is, the photosensitive colored recording layer was formed. The opposite side (
The following back surface treatment coating solution was applied to the back surface (back surface) so that the dry film thickness was 1 μm. Back surface treatment coating liquid: Si Miko 900AK solution [trade name, manufactured by Ohe Kagaku Co., Ltd.] (Methyl ethyl ketone solution of 30 wt% solution of melamine resin containing silicone oil) Solid content concentration 30 wt% As a result, back surface treatment with a critical surface tension of 22 dyne7/cm Got layers. Here, the critical surface tension is measured by a contact angle meter. Specifically, this was determined by conducting a wettability test with a formamide/ethyl cellosolve mixture described in JIS K676B ("71). Next, 20 sheets of this transfer image forming material were stacked and 50 g Zc
The blocking state was observed when the sample was left at 60° C. for 48 hours under a load of -2, but no blocking was observed. Furthermore, color separation mesh positive films of each color are superimposed to generate 4kW.
Image exposure was performed for 20 seconds from a distance of 50 cm using a metal halide lamp, and further development was performed by immersion in the following developer S at 32°C for 30 seconds to form a colored image in four colors. Developer solution> Konica 28 version development l5DR-1 (manufactured by Nika) 0ml Perex NBL (manufactured by Kao Atlas Co., Ltd.) 100ml
400ml of distilled water Next, place the image surface of each color image in close contact with art paper and heat at 90°C.
5 kg/cm” between a pair of nip rolls heated to
After passing at a speed of 50 cm/min under pressurized conditions,
The support was peeled off. Peeling was easily performed at the interface between the ethylene-vinyl acetate copolymer resin layer and the colored image, and each color image of black, cyan, magenta, and yellow was transferred onto each art paper. The obtained color proof had no missing images and was extremely similar to printed matter. Example 2 The same procedure as in Example 1 was carried out except that the following back surface treatment coating liquid was used. Back surface treatment coating liquid: Release 70 (trade name: Shikan Yushi Kogyo ■) (Toluene used in each method) Solid content: 7% or more This gave a back surface treatment layer with a critical surface tension of 15 dyne/cm. Layering 20 sheets of this transfer image forming material, 50g/c
The blocking state was observed when the sample was left at 60"C for 48 hours under a load of 1", but no occurrence of pro-linking was observed. Example 3 The same procedure as in Example 1 was carried out except that the following back surface treatment coating liquid was used. Back treatment liquid: Pearoyl 1010 (product name, Ichisha Yushi Kogyo ■) (
long chain alkyl pendant type polymer) 1g toluene
A backside treatment layer having a critical surface tension of 20 dyr+e/cm was obtained from these two 99 g pieces. Stacking 20 sheets of this transfer image forming material, 5Qg/cm2
The state of blocking was observed when the sample was left at 60°C for 48 hours under a load of 100°C, but no blocking was observed. Example 4 The same procedure as in Example 1 was carried out except that the following back surface treatment coating liquid was used. Back treatment coating liquid: KS-723A (product name, Shin-Etsu Chemical ■) 80gKS
-723B (Product name, Shin-Etsu Chemical ■) 20gPS-
3 (trade name, Shin-Etsu Chemical ■) 4 g toluene (trade name, Shin-Etsu Chemical @) 396 g (condensation type silicone resin) As a result, a back surface treatment layer having a critical surface tension of 12 dyne/cm was obtained. Stacking 20 sheets of this transfer image forming material, 50g/co+
” when left at 60°C for 48 hours under a load of
The knocking condition was observed, but no blocking was observed. Comparative Example 1 In the same manner as in Example 2, except that no back treatment agent was used,
A transfer image forming material was obtained. Stacking 20 sheets of this transfer image forming material, 50g/(11
The blocking state was observed when the sample was left at 60°C for 48 hours under a load of Z. As a result, blocking was observed in all 20 sheets. Effects of the Invention As described above, the transfer image forming material of the present invention does not cause blocking even when stacked, so it is easy to handle and has the effect that a transferred image similar to a printed matter can be obtained.

Claims (1)

[Claims] Claim 1: A heat-softening release layer and a photosensitive colored recording layer are provided in this order on one side of a support, and a critical surface tension of 3 is provided on the other side of the support.
A transfer image forming material comprising a back surface treatment layer having a thickness of 1 dyne/cm or less.