JPH02162093A - Transfer method of picture image - Google Patents

Abstract

PURPOSE:To prevent the displacement of a picture sheet and an image-receiving sheet and the generation of warpage and creases by giving a support plate specific thermal conductivity, forming a layer, in which a rubber is contained in one part of a surface on the side brought into contact with the superposed picture sheet and the image-receiving sheet, to the support plate and/or a cover sheet and transferring a picture image under the state in which one part of the layer including the rubber is brought into contact with one part of the superposed picture and image-receiving sheet. CONSTITUTION:A picture sheet on which a picture image is shaped and an image-receiving sheet receiving the picture image are stacked to a supporter having regidity, and pressured, or pressured and heated on the side reverse to the support plate side, and the picture image is transferred and processed. The support plate has thermal conductivity within a range of 1X10<-4>-20X10<-4>cal.cm<-1>.sec<-1>.deg<-1>, a layer in which a rubber is included in at least one part of a surface on the side brought into contact with the superposed picture sheet and image-receiving sheet is formed to the support plate and/or a cover sheet, the picture image is transferred and processed under the state in which one part of the layer containing the rubber is brought into contact with one parts of the stacked picture sheet and image- receiving sheet. The layer comprising the rubber improves the adhesive properties of the picture sheet and the image-receiving sheet on the transfer of the picture image, and prevents positional displacement between transferred picture images.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an image transfer method used for creating color blueprints and the like.

[Prior Art] It is well known that a color sheet for color proofing (color 1 roof toggle) is used to save the labor and time of proofing light, which is performed as a pre-process of main printing in multicolor printing.

Several methods have been proposed for creating this color blueprint, but in any case, an image sheet on which an image is formed and an image receiving sheet that receives the image are overlapped and pressed. It usually includes a step of transferring the image to an image-receiving sheet by applying heat or pressure. Unlike the method of forming an image by exposing the photosensitive layer transferred onto the transfer paper, the method for creating a color blueprint that includes this step involves sequentially transferring the formed image one color at a time, so each color It is important that there is no shift between images.

However, when an image sheet and an image-receiving sheet are passed between a pair of rollers for transfer, the positions of the two sheets may be misaligned, warping or wrinkles may occur, and in reality, the difference between images may occur. Misalignment was unavoidable.

Therefore, Japanese Patent Application Laid-open No. IO-255497 discloses a means for solving the above problem by sandwiching both sheets between a support plate such as a metal plate and a cover sheet and passing them between a pair of rollers. is shown as On.

[Problems to be Solved by the Invention] The technique described in the above-mentioned publication of 1986-255497 certainly solves the problem of misalignment and warpage between the image sheet and the image receiving sheet 1-.
Although it is effective to some extent in preventing the occurrence of wrinkles, the effect is not sufficient for practical use.In particular, since a metal plate such as an aluminum plate with good thermal conductivity is used as a support plate, heating during image transfer is necessary. When this is done, there is a problem in that the image-receiving sheet undergoes one-way change due to thermal expansion and contraction, and as a result, misalignment between transferred images is likely to occur. In addition, since the support plate becomes too hot due to heating, the operator cannot touch the support plate immediately after transfer, and it takes time for the support plate to cool down [1]. 141, there were also problems in the process, such as requiring a special cooling device or cooling mechanism such as an air cooling system.

Furthermore, since it is necessary to transport a relatively heavy metal plate such as an aluminum plate, there are also problems in the working environment, such as inconvenience to the worker.

In view of the above-mentioned problems, an object of the present invention is to prevent misalignment, warping, and wrinkles between an image sheet and an image-receiving sheet to a practically sufficient extent. An object of the present invention is to provide an image transfer method that prevents positional deviations between transferred images due to changes to a practically sufficient degree.

Another object of the present invention is to provide an image transfer method that can solve various process and work problems caused by the prior art, such as overheating of the support plate after image transfer and sagging of the support plate. The purpose is to provide the following.

[Means for solving the problem] The above object of the present invention is to overlap an image sheet on which an image is formed and an image-receiving sheet that receives the image, and to overlap both sheets on a support plate that has rigidity. In addition, in an image transfer method in which an image transfer process is performed by placing a cover sheet on the opposite side of the supporting plate side of both sheets and applying pressure, or applying pressure and heating, the supporting plate is
10-4~20X 10-4cafl-cra-'
-sec-'-deg-' (has a thermal conductivity in the D range, and is coated with rubber on at least part of the surface of the side where the support plate and/or cover sheet contacts the superimposed image sheet and image-receiving sheet. and the image transfer process is performed in a state where at least a part of the layer containing the rubber is in contact with at least a part of the overlapping image sheet and image receiving sheet. This was achieved by providing an image transfer method.

The present invention will be explained in more detail below.

The support plate used in the present invention has a thermal conductivity of I x 1
0-4caj! -CIll-'-sec-' -d
eg-' ~20x10-4caj! -cm-'-
sec-'-deu-', and considering workability such as portability and prevention of positional shift during movement, it is preferable to be made of a material with rigidity. Specifically, phenol , epoxy, polyethylene, polypropylene, polytetrafluoride monobrene, fluorinated ebulene brobylene, trifluorochloroethylene, polyvinyl chloride,
Polyvinylidene chloride, polyvinylidene fluoride, polyvinyl alcohol, polystyrene, styrene-acrylic nitrile, styrene-butadiene, acrylonitrile-butadiene-styrene, polymethyl methacrylate-1, 2L
-(j lulose, cellulose ahite-1-, cellulose acetate butyrate, cellulose propione
1~, Support consisting of resins such as ethylhirulose, acetal small mobolymer, polyamide (nylon), chlorinated polyether, polyethylene oxide, polycarbonate 1-1PPO, melamine formaldehyde, urea formaldehyde, polyester, polyurethane, allyl, silicone, etc. I can list the board.

The thickness of the support plate is 10 μm to 5 mm, particularly 0.1 to 1.5 mm.
A range of 5 mm is preferred.

Here, thermal conductivity is defined as follows.

That is, the speed of heat transfer due to thermal conduction q[cafsec-1
] is the temperature gradient at that point cH/dl [dc.

・C “1” and the area perpendicular to the direction of flow [cm2
] is known to be proportional to This is called Fourier's law and is expressed by the following formula.

q=-λA dt/dt where the proportionality constant λ[caj! -cm-' -sec
-' -deg-13 is called thermal conductivity.

The cover sheet used in the present invention is a cover sheet 1- made of a plastic resin such as PET resin or polyimide resin and having a thickness of 50 μm to 500 μl, preferably about 100 μm, in consideration of thermal conductivity and operability. Can be used.

In the present invention, the rubber-containing layer (hereinafter referred to as anti-slip layer) provided on the cover sheet and/or the support plate improves the adhesion between the image sheet and the image receiving sheet 1 to 1 during image transfer. 11 for the purpose of preventing positional deviation between images
3.

Such an anti-slip layer is provided on at least a part of the surface of the support plate and/or cover sheet that is in contact with the superimposed image and the image-receiving image sheet, and is provided on at least part of the surface of the support plate and/or cover sheet that is in contact with the superimposed image and the image-receiving image sheet. Preferably, it is provided on both the sheet-side surfaces of at least one of the support plate and the cover sheet, particularly preferably on the both sheet-side surfaces of both the support plate and the cover sheet, and the image sheet is provided in contact with the image sheet. It is preferable that the image transfer process be performed while in contact with at least one surface of the image-receiving sheet.

The anti-slip layer may be made into a film and simply glued together once on a support plate or cover sheet, or may be completely bonded using an adhesive, a primer, or the like. Alternatively, the anti-slip layer may be formed by applying a coating solution in which a rubber-containing material forming the anti-slip layer is dissolved and dispersed in a solvent onto the support plate or cover sheet and drying.

The thickness of the anti-slip layer is not particularly limited, but is preferably in the range of 0.1 to 300 μm.

Although natural rubber can be used as the rubber used for the anti-slip layer, synthetic rubber is preferable.

Such synthetic rubbers include styrene-butadiene rubber, butadiene rubber, isoprene rubber, chloroprene rubber, urethane rubber, polysulfide rubber, tetrafluorinated ethylene-propylene rubber, acrylic rubber, shrimp chlorohydrin rubber, ethylene vinyl acetate rubber, 1. 2-Polybutadiene rubber, thermoplastic elastomer (e.g. styrene, olefin, urethane, polyester, polyamide, fluorine), ethylene/buOpyrene copolymer, ethylene/propylene/diene copolymer, nitrile Examples include butadiene rubber, butyl rubber, fluororubber, chlorosulfonated polyethylene, propylene oxide rubber, ethylene/acrylic rubber, norbornene rubber, silicone rubber, and silicone rubber is particularly preferred. The above may also be used for (If).

Such silicone rubber is preferably one whose main component is a linear organic polysiloxane having the following repeating units and a molecular weight of several thousand to several hundred thousand.

1+S i -0籟- Here, the number is an integer of 2 or more, R is an alkyl group having 1 to 10 carbon atoms, a halogenated alkyl group, a vinyl group, or an aryl group, and 60% or more of I (is a methyl group). Something is preferable.

Silicone rubbers useful in the present invention include those obtained by a condensation reaction between such silicone base polymers and a silicone crosslinking agent as described below.

(1) R-3i-+OR') (2) R-8i--G-OAc) (3) R-
3i-+0N=CR' 2 )2 Here, R has the same meaning as the above-mentioned 1 dog, R' is an alkyl group such as a methyl group or an ethyl group, and AC is an acetyl group.

These silicone rubbers are commercially available, such as rYS-3085J manufactured by Toshiba Silicone Co., Ltd.

Other useful silicone rubbers can also be produced by reacting base polymers as described above with silicone oil containing repeating units as shown below, or by reacting R
1 can be obtained by any addition reaction of a silicone base polymer in which about 3% of the silicone base polymer has vinyl groups, or by a reaction between silicone oils of the [ ] type silicone oil.

(In the formula, R has the same meaning as the above R, m is an integer of 2 or more,
n is an integer of 0 or 1 or more. ) In order to cure silicone rubber by such a crosslinking reaction, organic carboxylates of metals such as tin, zinc, cobalt, lead, calcium, and manganese, such as dibutyltin laurate and tin, are added to the above ingredients. (n) A catalyst is added, such as cobalt naphthenate, or chloroplatinic acid.

Further, in order to improve the strength of the silicone rubber, a filler can be mixed therein.

Silicone rubber pre-mixed with filler is commercially available as silicone rubber stock or silicone rubber dispersion, and if you want to obtain a slip-preventing layer using a silicone rubber film for coating,
Ice versions of RT V or LTV silicone rubber are preferably used. An example of this is l-
-Resilicone IurSyl Off 23J,
There are silicone rubber dispersions for paper coating such as rsRX-257J and HarSH237J.

Preferably, the silicone rubber layer further contains a silane coupling agent in order to improve adhesiveness with the support plate or cover sheet.

Examples of the silane coupling agent include the following.

(a) H2NCHICH2NHCCH, CH2CH
! 5i(OCH3))(c) H3(CHz)a
Si(OCH-)3(d) CH*=CI(Sr(O
COCH-)s(e) CH2=CC00(CHi)
3si(OCHs)3CH.

(f) CH,=CH8i(OCI-12CH,
)3(g) H2NCHzcH2NH(CHz)-8
i(OCH*)z(CH3)(h) The chlorosilane anti-slip layer further contains (a) tackifier resin such as rosin, polyterpene, phenol resin, xylene resin, epoxy resin, petroleum carbonized resin, and (b) phthalate. acid ester,
Plasticizers such as Nisder phosphate and chlorinated paraffin, (C) fats and oils such as animal oil and mineral oil, etc. may be added to adjust the adhesion to the sheet. In addition, anti-aging agents, stabilizers,
Fillers, colorants, etc. may be added.

In the present invention, when transferring an image, as a means for applying pressure or applying pressure and heating, an image sheet on which an image is formed and an image-receiving sheet that receives the image are overlapped, and this is placed on the support plate. Typical methods include stacking the cover sheet on the side opposite to the support plate side of both sheets, and then applying pressure to one or more pairs or passing between pressurized and heated nip rolls. However, a press method using a flat plate or the like may also be used. Pressure conditions are 1.0 to 10KO/Cm2, heating conditions are 60℃ to 150℃, and passing speed is 20 to 160c.
A range of m/min is suitable.

The above cover sheet t can be used by directly overlapping the image/image receiving image sheet 1 on the support plate with the anti-slip layer in contact with it.
The end may be attached to one end of the support plate and may be used in various forms.

The image sheet according to the present invention basically uses a colored image forming material in which a colored image forming layer containing a photosensitive composition and a colorant is provided on a support, and an image is formed thereon. It is obtained by

To obtain a multicolor image using this image sheet and image-receiving sheet, first, a first-color colored image is formed on a first-color colored image-forming material, and at least the colored image is transferred to the image-receiving sheet to form a colored image-forming material. Peel off the support. Next, the second
After forming a second color colored image on the n-color image forming material, the second color l/n mark image formed along with this is transferred to the first color register mark image on the image receiving sheet while performing the registration process. , transferring a second colored image onto the first colored image and peeling off the support to obtain a -two color matched image. Similarly, colored images of the third and fourth colors are also transferred onto the image-receiving sheet to obtain a multicolor image. In addition, in some cases, this multicolor image is indirectly transferred onto another transfer material to make the multicolor image 1R (hereinafter referred to as indirect transfer method % formula %). No. 41830, No. 59-97140, No. io-28G49, and U.S. Pat. No. 3,775.113.

Since the image on the image sheet is finally transferred to the image receiving sheet, in order to efficiently transfer the image to the image receiving sheet and to facilitate peeling off the support after image transfer, it is necessary to apply a suitable coating on the surface of the support. It is preferable to perform mold release treatment using an oil-repellent substance or a mold release layer.

As the oil-repellent substance, for example, silicone resin, fluororesin, fluorosurfactant, polyolefin, polyamide, etc. can be used.

Polypropylene films, polyethylene films, etc. exhibit good mold release properties even without special mold release treatment, so a particularly preferred embodiment is to provide a polypropylene layer or a polyethylene layer that is wider than the thickness of the support. .

Methods for forming a polypropylene layer or a polyethylene layer on a support are as follows: 1) Adhesion of a solution of polyvinyl acetate, polyvinyl chloride, epoxy resin, polyurethane resin, natural rubber, synthetic rubber, etc. dissolved in an organic solvent. The so-called dry lamination method involves applying these adhesives on a support, drying them with hot air or heating, and then overlapping polypropylene films or polyethylene films and laminating them by pressing under heat. ) Use ethylene and vinyl acetate, co-compounds of 1-dylene and acrylic acid ester, polyamide resin, petroleum resin, O-gins, waxes, or mixtures thereof as adhesives, and heat these adhesives as they are to melt them. After applying the film onto the support by a doctor blade method, roll-to-1 method, gravure A7 method, reverse roll method, etc. while maintaining the film, a polypropylene film or a polyethylene film is laminated and heated to a high temperature as necessary. 3) Polypropylene or polyethylene is kept in a molten state and extruded into a refilm form into an extrusion tube, and while it is in the molten state, the support is laminated. Crimp and laminate 1-
4) When molding a film to serve as a support by melt extrusion, multiple extruders are used to mold polypropylene or polyethylene in a molten state onto a support film by two rounds of molding. Examples include so-called coextrusion methods for forming a polypropylene layer or a polyethylene layer.

The release layer may further include, for example, 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, polyester, etc. Copolymer of methyl methacrylate-1 and acrylate, polyvinyl chloride, copolymer of vinyl chloride and vinyl acetate, polyvinyl butyrate, cellulose acetate phthalate, methylcellulose, ethylcellulose, cellulose diacetate M, cellulose triacetate , polyvinyl alcohol, butyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose, cyanoethyl cellulose, cellulose aretate, cellulose triacetate, cellulose aretate butyrate, hydroxypropyl methyl hyllulose phthalate, hydroxypropyl methyl cellulose Hydrophthale-1 or a mixture thereof is used to produce a blue color.

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

As the transparent support used in the colored image forming material used in the present invention, a polyester film, particularly a biaxially oriented polyethylene terephthalate film, is preferable in terms of dimensional stability against water, heat, etc., but acetate film,
Polyvinyl chloride film, polyethylene film, polypropylene film, polyethylene film may also be used.

The colored photosensitive layer is imagewise removed by development following imagewise exposure to form a colored image.

In the present invention, various photosensitive compositions can be used as the photosensitive composition contained in the colored photosensitive layer, but when irradiated with actinic rays alternately, the molecular structure of the composition undergoes a chemical change after a short period of time. It includes all compounds such as polymers, prepolymers, or polymers whose solubility in solvents changes and whose exposed or unexposed areas are dissolved and removed when certain solvents are applied. It will be done. Examples of photosensitive compositions that can be used include photocrosslinkable photosensitive compositions, such as those made by esterifying polyvinyl alcohol with cinnamic acid, which are so-called negative-positive type compositions in which the solubility of exposed areas decreases. There are resin systems, 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 are mixed with binders such as lit rubber. Photosensitive resins that utilize photoradical m-combination or photoion m-combination can be used. Also, examples of so-called positive-positive type compositions that increase solubility in exposed areas include 16-photosensitive resin compositions containing 0-quinonediazide as a photosensitive substance; specifically, 1,2-benzoquinonediazide- 4-sulfonyl chloride, 1,
2-rif l-quinonediazide-4-manifonyl chloride, 1,2-naphthoquinonediazide-5-sulfonyl chloride, 1,2-naphthoquinonediazide-6-sulfonyl chloride, and a compound in which a compound containing a hydroxyl group and/or an amino group is condensed. Preferably used.

Examples of the above-mentioned hydroxyl group-containing compounds include trihydroxybenzophenone, dihydrogiene h-laquinone, bisthral 1-nol A1 phenol novolac resin, resorcinol benzaldehyde condensation resin, pyrogallol aretone condensation resin, and the like. In addition, as the above amino group-containing compound,
Examples include aniline, p-aminoschiffinylamine, p-aminobenzophenone, 4,4'-diaminodiphenylamine, and 4,4-diaminobenzophenone.

Regarding the above 0-quinonediazide compound, 1, Zarani J
, written by KO8AR “Liu Hat 3 cnsitive
SySteffi” (Wiley&5OnS,
New York, 19 (i5) and Nagamatsu, Inui゛゛Photosensitive Polymer゛ (Judansha).

1977) can also be used.

Roughly positive-positive type compounds include i) compounds that can generate an acid upon irradiation with actinic rays, ii) compounds that have at least one bond that can be decomposed by an acid, and 1i
It is also possible to use photosensitive resin compositions containing i) novolac resins containing two or three different phenols.

The content of the above photosensitive composition in J3 in the colored photosensitive layer is as follows:
For example, 5 to 80% by weight is appropriate.

Further, as the binder constituting the colored photosensitive layer, there is used a polymer compound which is film-forming and solvent-soluble, and is preferably soluble in an alkaline developer or U3-wettable.

Specific examples of such polymeric compounds include, for example, polymeric compounds whose molecular structure contains a structural unit representing an aromatic hydroxyl group represented by the following general formula.

General formula: Here, R1 and R2 are hydrogen atoms, alkyl groups, or carboxylic acid groups, R3 is hydrogen atoms, halogen atoms, or alkyl groups, R4 is hydrogen atoms, alkyl groups, phenyl groups, or aralkyl groups, and X is a nitrogen atom and an aromatic group. It is a divalent organic group that connects a group carbon atom, where n is 0 or 1, and Y is a phenylene group that may have a substituent or a naphthylene group that may have a substituent.

Specifically, examples of the seven polymers forming the structural unit represented by the above general formula include N-(4-hydroxyphenyl)-(meth)acrylamide, N-(2-hydroxyphenyl)-(meth)acrylamide, (meth)acrylamides monomer such as N-(4-hydroxynaphthyl)-(meth)acrylamide; o-lm- or p-hydroxyphenyl (meth)acrylate monomer; O-
(2)- or p-hydroxystyrene monomers, etc. can be mentioned.

In the present invention, it is preferable to use a copolymer of a monomer forming a structure having an aromatic water M group represented by the above general formula and the following monomers as a binder.

Acrylonitrile: CH,=CcoNR% Alkylacryle-)M: CH,=CC-0
R' acrylic acids; S CH,=C -OH where R5 is a water radical -r, an al-4-al group, or a [1
represents a gen atom, and F<6 represents an alkyl group, a phenyl group, or a pfdyl group.

1) In the above copolymer, is the aromatic compound represented by the above general formula?
! The ratio of the f-group hydroxyl groups to the right is preferably 1 to 30 mol%.

In addition, F of the unit formed from the above acrylonitriles
The proportion in the copolymer is preferably 0 to 50 mol 96, and more preferably 5 to 40 mol % in consideration of developability. The proportion of structural units formed from the alkyl acrylates is preferably 50 to 95 mol% from the viewpoint of developability with a low alkaline aqueous solution, and most preferably 60 to 95 mol%. Give sex.

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 above-mentioned structural units, such as acrylic acid or methacrylic acid, in addition to the above-mentioned structural units. Considering the development latitude, the proportion in the compound is preferably 0 to 20 mol%, and 0 to 1% by mole.
0 mole % is most preferred.

The m average molecular weight of such a polymer compound is preferably 1000 to 100.000, more preferably 1000 to 30.000, from the viewpoint of developability or resolution when a low alkaline aqueous solution is used as a developer. A range of 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.

1:m:n=(1-25):(5-40):(50-9
5) Here, R7 represents a hydrogen atom or a methyl group.

Further, in the present invention, a polycondensation resin such as a novolak resin obtained by polycondensation of at least one type of phenol and an active carbonyl compound may 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 water, and specifically includes phenol, 0-cresol, m-cresol, p-cresol, 3.5-xylenol, 2.4-xylenol, 21 J 4 disylenol, carvacrol, plumol, cabucol, resorcinol, human 1-coquinone, pyrogallol, phloroglucin, alkyl group (1 to 8 carbon atoms) ff Examples include 'fE% phenol.

Active carbonyl compounds include, for example, aldehydes, ketones, etc., and specifically, for example, formaldehyde, acetaldehyde, benzaldehyde, acrolein, ``norfural, at?? Examples include tons.

The above polycondensation resins include phenol formaldehyde novolak resin, m-cresol formaldehyde novolak resin, phenol/m-cresol/formaldehyde co-condensate resin, phenol/p-cresol/formaldehyde co-condensate resin,
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/O
Examples include -cresol◆p-cresol/formaldehyde copolycondensate resin, phenol/■-cresol/p-cresol/formaldehyde copolycondensate resin, and the like.

A preferred novolac resin is a phenol formaldehyde novolac resin, where molecule m is the weight average molecule faMW
is 3500-500, number average molecule m M n is 1000
A range of 200 to 200 is preferred.

Furthermore, other polymeric compounds that can be used as binders include sulfoalkyl esters of (meth)acrylic acid (co)polymers, vinyl acetal (co)polymers, vinyl ether (co)polymers, and acrylamide (co)polymers. Also included are polymers, styrene (co)polymers, cellulose derivatives, vinyl acetate (co)polymers, and the like.

Dyes and pigments as colorants are added to the colored photosensitive layer. In particular, when used for color proofing, pigments and dyes with tones matching the required colors 1, yellow, magenta, cyan, and black are required, as well as metal powders and white pigments. , fluorescent pigments, etc. are also used. The following examples are some of the many pigment J3s and dyes known in the art.

(C, I mean color index).

Victoria Pure Blue (C, I 42595) Auramine (C, I 41000) Cathylone Brilliant Flapine (C3! Basic 13) Rhodamine 6GCP (C, + 115160) Rhodamine B (C, I 45170) Furanine 0K
70: 100 (C, I 50240) Erioglaucine X (C, I 42080) Fast Black 11 B (C, I 26150) N 0.12
01 Lionor Yellow (C, + 21090) Lionor Yellow [1-GRO (C, l 21090) Shimla First Yellow o -s GF (C, I 211
05) Penjijin 10-4 T-5G4D (C, 1210
95) Shimla Firth 1-Red 4015 (C, I
12355) Lionor Red 7 B12O3 (C
, I 15830) First Gen Blue TGR
-L (C, I 74160) Lionor Blue SM
(C, I 26150) Mitsubishi Carbon Black M
A-100 Mitsubishi Carbon Black #30. tt40
．． #50 Cyanine Blue 4920 (Large [L made by Viscous)
Rayyoku First Carmine 1483 (Dainichiseika Chemical Co., Ltd.) Seiryoku First Yellowt 1-7055 (Dainichiseika Chemical Co., Ltd.) The content ω of the coloring agent in the colored photosensitive layer is preferably 5% to 50% using a weight, for example. It is.

The colorant/binder ratio of the colored photosensitive layer can be determined by a method known to those skilled in the art, taking into consideration the target optical density and the removability of the colored photosensitive layer with respect to a developer. for example,
In the case of dyes, the appropriate value is 5% to 75% in weight ω, and in the case of pigments, the value is 5% to 90% in weight.

The thickness of the colored photosensitive layer is determined by a method known to those skilled in the art, depending on the target optical density, the type of colorant (dye, pigment, carbon black) used in the colored photosensitive layer, and the content of the coloring agent. However, as long as it is within an allowable range, the thinner the colored photosensitive layer is, the higher the resolution will be, and the better the image quality will be. Therefore, the film thickness is 0.1 μm
It is customary to use it in the range of ~5 μm.

In addition to the above-mentioned materials, a plasticizer, a coating property improver, etc. may be added to the colored photosensitive layer, if necessary.

Examples of plasticizers include various low-molecular compounds such as phthalate esters, 1 to rifenyl phosphenes I and maleate esters, and examples of coatability improvers include ethyl cellulose and polyalkylene ether. Surfactants such as nonionic surfactants, fluorine surfactants, and the like can be mentioned.

Further, the colored photosensitive layer can be divided into two layers: a coloring agent layer made of a colorant and a binder, and a photosensitive layer made of a photosensitive composition and a binder. In this case, the dora layer may be present on the support side.

Coating methods for coating the colored photosensitive layer on the support include, for example, roll coating, reverse roll coating, dip coating, air "if: I-lining", gravure coating, gravure offlet coating, and hopper coating. Methods such as coating, blade coating, ronto coating, dry coating, spray coating, curtain coating, and extrusion coating are used.

Drying is accomplished by blowing heated air onto the coated surface. The heating temperature is preferably 30°C to 200°C, particularly preferably 40°C to 140°C. During drying, the colored photosensitive layer is generally dried while keeping the temperature of the heated air constant, but it is also possible to dry the colored photosensitive layer by increasing the temperature of the heated air in stages. can. Further, it is preferable that the heated air be supplied to the coating surface at a rate of 0.1 m/sec to 30 m/sec, and particularly preferably at a rate of 0.5 m/sec to 20 m/sec. suitable.

When the colored photosensitive layer contains a photopolymerizable substance, A, which can dissolve or swell in the developer, is added on the colored photosensitive layer to prevent combination inhibition caused by the influence of oxygen.
It is also possible to provide one or more layers. Examples of resins used in the Δ-barcode layer include polyvinyl alcohol, polyethylene oxide, polyacrylic acid, polyacrylamide, polyvinyl methyl ether, polyvinylpyrrolidone, polyamide, gum arabic, glue, gelatin, casein, and hirulose (for example, Viscose,
Methyl cellulose, ethyl cellulose, hydroxye J
Examples include cellulose, human [1-xypropylmethylcellulose, carboxymethylcellulose, etc.], starches (for example, soluble lυ powder, tempered starch, etc.).

The image-wise exposure of the colored image-forming material is carried out by, for example, irradiating the film with ultraviolet rays while bringing the color-separated film and the colored image-forming material corresponding to each color into close contact with each other. Light sources include mercury lamps, ultra-high pressure mercury lamps, metal halide lamps,
Tungsten lamps, Kibinon lamps, fluorescent lamps, etc. are used.

Then the phenomenon takes place. As a developer for forming a colored image, an alkaline developer containing water as a main solvent is preferably used, and examples of the alkaline agent used in the developer include sodium carbonate, notrium bicarbonate, sodium citrate, and silicate. potassium acid, sthorium hydroxide,
Potassium hydroxide, lithium hydroxide, trisodium phosphate, dibasic sodium phosphate, tribasic potassium phosphate, dibasic potassium phosphate, dibasic ammonium phosphate, dibasic ammonium phosphate, sodium metasilicate, lithium dibasic, Inorganic alkaline agents such as sodium carbonate, potassium carbonate, ammonium carbonate, ammonium silicate, and organic alkaline agents such as mono-, di- or triethanolamine and teI-raalkylene 7nia hydroxide are used. The content of alkaline agent in the developer composition is 0.05 to 3.
It is preferable to use the alkaline developer in a range of 0fflff1%, and the alkaline developer contains organic solvents such as ethylene glycol monophenyl ether, benzyl alcohol, and n-propyl alcohol, surfactants, sulfite M salts, and EDT.
It can contain a chelating agent (A), an antifoaming agent (organosilane compound q), etc.

The transfer material to which the colored image formed by imagewise exposure and development of the reporter color image forming material 1 is transferred includes art paper,
General printing paper such as foot paper, high-quality paper, synthetic paper, etc. can be used.

"Example" Hereinafter, the present invention will be explained in more detail with reference to Examples.

Example 1 A colored photosensitive layer dispersion having the following composition was applied to the polypropylene surface of a support obtained by laminating a 25 μm thick polypropylene film on a 50 μm thick polyethylene terephthalate film by a dry lamination method using a Kui 1 Hoover to form a dry film. It was coated to a thickness of 1 μm and dried to prepare four colored image forming materials for each of the following pigments.

(Colored photosensitive layer dispersion liquid composition) The following pigment: Ethylcetate [1 Solve] 39.6 g Fluorine surfactant (manufactured by 3M Company, FC-/130) 0.
05g (pigment) Black: Carbon black MA-100 (manufactured by Mitsubishi Kasei) 0.991; 1 Cyan Nidianin Blue 4920 (manufactured by Dainichiseika) 0.550 Magenta: Seiriki First Carmine 1483 (manufactured by Jinnichiseika > 0 .68 (1-1 day-2t? Ino J Fast Yellow H-7055 (manufactured by Dainichiseika) 0.68 () Polyethylene derephthalate films of each of the four colored image forming materials obtained above Layer each color separation mesh positive film on the surface and 5Qc with a 4KW metal halide lamp.
Image exposure was performed for 20 seconds from a distance of m, and the following developer solution was applied to
JJI imaging was performed by dipping for a second to form a four-color colored image.

(Developer) Sodium PA acid 15 g Surfactant (Perex NBL manufactured by Kao Atlas Co., Ltd.) 50! J distilled water 10,000 or less, image transfer was performed as shown in FIG. 1. That is, among the four colored image sheets formed, the image surface of the black color image sheet 1 and the art paper 2 are secretly separated, and the thickness is
o, 5its polystyrene support plate (thermal conductivity 1.9x 10-4 call-C11l-1-5e
C-1-dcg-') 3 and a cover sheet 4 made of PET having a thickness of 100 μm and one end of which was attached to one end of the support plate. However, a toluene solution of silicone rubber (manufactured by Toshiba Silicone Co., Ltd., TSE-399) was dried on the surfaces of the support plate 3 and the cover sheet 4 that were in contact with the black image sheet 1 and the art paper 2, respectively. Film thickness 50μm1. : A material was used that was suitable for the anti-slip layer that was prepared by rinsing the cloth and drying it.

Next, 50 kg/Ci' of pressure was applied between a pair of nip rolls heated to 90°C in one direction as indicated by the arrow.
After passing at a speed of cm/min, the support of the black image sheet was peeled off. Peeling was easy and a black image was transferred onto the art paper. Subsequently, colored images were transferred in the same order as cyan, magenta, and yellow to obtain a color blue ink image consisting of four colors on art paper.

The registration marks on the colored image sheet (register marks for the registration mark) are placed at each of the four corners of the sheet, at a distance of 400mm in the X direction.
We formed the register marks at intervals of 60On+m in the Y direction perpendicular to this, and after image transfer, we measured the positional deviation between the transferred images and the maximum deviation width of the register marks between the multicolor images. The results are shown in Table 1.

Examples 2 to 4 The same procedure as in Example 1 was carried out to form a colored image in four colors: J: rib black, cyan, magenta, and yellow, except that the support plate was changed as shown in Table 1. Examples 2 to 4 were carried out in the same manner. The results are shown in Table 1.

Example 5 A colored image in four colors of black, cyan, magenta, and yellow was formed by the same operation as in Example 1, and the lower support plate was replaced with an epoxy plate (thermal conductivity 4X10-"caffi・c).
Example 5 was carried out in the same manner as in Example 1, except that instead of using a sheet (m-'・sec-'-deg-'), and the anti-slip layer was provided only on the support plate side rather than on the cover sheet. . The results are shown in Table 1.

Example 6 A four-color image of black, cyan, magenta, and yellow was formed by the same operation as in Example 1, and the supporting plate was made of epoxy (thermal conductivity: 4 x 10-4 cal -cm-').
Example 6 was carried out in the same manner as in Example 1, except that instead of using -sec-'-dcg-') and the anti-slip layer was provided on the support plate only on the cover sheet 1 side and not on the stage 4-J. The results are shown in Table 1.

Comparative Example 1 A colored image in four colors of J: rib black, cyan, magenta, and yellow was formed in the same manner as in Example 1, and as shown in FIG. Rate 0.
487caffi -cm-'・sec-' -de
Comparative Example 1 was conducted in the same manner as Example 1 except that the anti-slip layer was not provided on either side of the support plate or the cover sheet. The results are shown in Table 1.

It is clear from Table 1 that in Examples 1 to 6'C'' using the transfer method of the present invention, the positional deviation between transferred images was significantly improved compared to Comparative Example 1 using the conventional method. I'm here.

Further, in Comparative Example 1, wrinkles were observed in several places on the image sheet after the image transfer process, but in Examples 1 to 6, the occurrence of wrinkles was normal.

Furthermore, in Comparative Example '1, an aluminum plate was used as the support plate, so the support plate was heavy and inconvenient to transport, and the support plate could not be touched directly after the image was transferred. However, in Examples 1 to 6, such problems did not occur at all.

[Effects of the invention: Song Dynasty 1 As explained in detail above, the image transfer method of Wood 5 and Ming can prevent misalignment, warping, and wrinkles between the image sheet and the image-receiving sheet to a practically sufficient degree, and is especially effective. Misalignment between transferred images due to dimensional changes due to thermal expansion and contraction of the image-receiving sheet can be prevented to a practically sufficient level.

Furthermore, the image transfer method of the present invention can solve various process and work problems that arise in the prior art due to overheating of the support plate after image transfer, small size of the support plate, etc. .

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of the method of the present invention according to Example 1, and FIG. 2 is a schematic diagram showing a conventional technique used in Comparative Example 1. 1... Black image sheet 1-2... Art paper (image receiving sheet) 3... Support plate 4... Cover sheet 1-5... Anti-slip layer

Claims (1)

[Claims] An image sheet on which an image is formed and an image-receiving sheet that receives the image are superimposed, and both sheets are superimposed on a rigid supporting plate, and a cover sheet is superimposed on the side opposite to the supporting plate side of both sheets. In an image transfer method in which an image transfer process is performed by applying pressure or applying pressure and heating after combining, the support plate has a size of 1×10^-^4 to 20×
10＾-＾4cal・cm＾-＾1・sec＾-＾1・
A layer having a thermal conductivity in the range of deg^-^1 and containing rubber on at least a part of the surface of the side where the support plate and/or cover sheet is in contact with the superimposed image sheet and image receiving sheet. an image transfer method, characterized in that the image transfer is carried out in a state where at least a part of the layer containing the rubber is in contact with at least a part of the superimposed image sheet and image receiving sheet.