JPH10264595A - Image transferring electrostatic recording medium and image transferring method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To transfer an image satisfactorily without thermal fusion bonding to an element to be transferred in the case of transferring by sequentially providing a curing resin mold release layer containing mold releasing agent and a release layer on a base sheet having a conductive layer, and specifying a surface resistance value. SOLUTION: The image transferring electrostatic recording medium 20 comprises a curing resin mold release layer 22 and a release layer 23 sequentially laminated on one surface of a base sheet 21, and a conductive layer 24 on the other surface. After a transferring image is formed on the medium 20 having a surface resistance value of the image forming surface of 1×10<12> to 1×10<17> Ωcm, it is thermally press bonded to the element via an adhesive layer, and the image on the medium 20 is transferred onto the element. The image to be transferred is formed by developing an ion pattern formed by forming the pattern with ion flow on the medium with wet developer containing colorant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an image transfer electrostatic recording medium and an image transfer method used for transferring an image to a transfer target such as cloth, paper, film, and leather.

[0002]

2. Description of the Related Art In order to form a pattern on an object to be transferred such as cloth, paper, film, and synthetic leather, a method of transferring an image formed by a pigment or the like is widely used. Recently, it has been attempted to meet various demands by transferring an image to a material having irregularities on the surface, for example, a material having minute holes on the surface such as natural leather to form a pattern.

For example, as a method of transferring a color pattern, there is a method of transferring using a plurality of plates corresponding to colors.
A great deal of time and money is required for the plate making process. Also, various requests are made for the design according to fashion, time, etc.
In the prior art, there was a time problem in responding to these demands immediately.

On the other hand, it is also possible to transfer an image on a photoconductor to a desired material by using an electrophotographic method such as an electrophotographic copying machine. A complicated mechanism such as static elimination and cleaning is required, and further, there is a problem that the shape of the object to be transferred is restricted by the shape of the photoconductor.

As a method for solving such a problem, the present inventors have formed an ion pattern on an electrostatic recording medium for image transfer using an ion printer, and formed the ion pattern on a wet developing medium containing a colorant. A method for transferring an image on the electrostatic recording medium for image transfer to a transfer-receiving body after developing with an agent to produce an electrostatic recording medium for image transfer has been developed.
-268875. This image transfer method makes it possible to easily produce a real-time, tone-graded image directly while observing necessary colors and patterns on a display device such as a CRT display device. While having excellent properties, it is suitable for transferring images to a transfer target such as cloth, paper, film, and synthetic leather, but its image transfer characteristics are not sufficient, and heat transfer tends to occur depending on the transfer target. It turned out to be an issue. Therefore, a release layer made of a curable resin was proposed, but it was found that there was a problem that the peeling was heavy and the transfer residue was large.

[0006]

SUMMARY OF THE INVENTION The present invention provides an image transfer method which does not cause thermal fusion with a transfer object during transfer, enables good image transfer, has a suitable peeling property, and has a small transfer residue. It is an object to provide an electrostatic recording medium for use and an image transfer method.

[0007]

According to the present invention, there is provided an electrostatic recording medium for image transfer according to the present invention, wherein a curable resin release layer containing a release agent is provided on a base sheet having a conductive layer. A release layer is provided on the layer and the surface resistance value is 1 × 10 ¹² Ω to
It is characterized by 1 × 10 ¹⁷ Ω.

The above-mentioned electrostatic image recording medium for image transfer forms an ion pattern by an ion stream, and the formed ion pattern is developed by a wet developer containing a colorant to form an image for transfer. It is characterized by being.

The curable resin in the electrostatic image recording material for image transfer is an ultraviolet curable resin, and the release agent is wax, silicone oil, or μ-hydrooxo-.
It is characterized by being at least one kind of μ-stearatobis (dichlorochrome (trivalent)).

According to the image transfer method of the present invention, a curable resin release layer containing a release agent is provided on a base sheet having a conductive layer.
A release layer is sequentially provided and the surface resistance value is 1 × 10
After forming an image for transfer on an electrostatic recording medium for image transfer having a resistance of ¹² Ω · cm to 1 × 10 ¹⁷ Ω · cm, the image is subjected to thermocompression bonding with an object to be transferred via an adhesive layer to form an image. An image on a recording medium is transferred onto a transfer target.

[0011] The transfer image is formed by forming an ion pattern on the electrostatic image recording medium for image transfer by an ion flow and developing the formed ion pattern with a wet developer containing a colorant. Features.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The electrostatic recording medium for image transfer of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating an example of an electrostatic recording medium for image transfer. 1 has a curable resin release layer 22 and a release layer 23 sequentially laminated on one surface of a base sheet 21 and a conductive layer 24 on the other surface.

As the base sheet 21, a material generally used as a base material of a thermal transfer sheet can be used. Specifically, synthetic resin films such as polyester films such as polyethylene terephthalate and polybutylene terephthalate, polyolefin films such as polyethylene and polypropylene, polyamide films such as nylon, and paper and synthetic paper can be used. Further, as the base sheet, a plurality of these materials may be laminated, and the film thickness may be 5 to 150 μm.
m, preferably 30 μm to 100 μm.

A curable resin release layer 22 containing a release agent
Is provided for the purpose of preventing thermal fusion with the transferred body after transfer, and reducing the peel strength, and is made of a thermosetting resin containing a release agent, or an actinic ray-curable resin. You.

Examples of the release agent include a substance having a low energy interface forming ability and capable of improving the release property of the release layer, such as silicone oil and silicone varnish. Silicone oils and silicone varnishes used for these purposes include dimethyl silicone oils, straight silicone oils such as methylhydrogenpolysiloxane and cyclic dimethylpolysiloxane, and alkyl-modified, fluorine-modified, amino-modified, and epoxy-modified. Such modified silicone oils are exemplified.

When the curable resin is an actinic ray-curable resin, a heat-fusible substance having a melting point of 40 ° C. to 160 ° C. may be used as a release agent. When the image is transferred by being superimposed on the adhesive layer, the adhesive force with the release layer is reduced to improve the release transfer characteristic, and examples thereof include oils and fats and waxes. Fats and waxes used for these purposes include waxes such as montan wax, beeswax, rice wax, candelilla wax, lanolin wax, paraffin wax, microcrystalline wax, polyethylene wax,
Sasol wax, oxidized wax, amide wax, silicone wax, and the like.

Commercial products include WAX E, WAX KPS, and WAX, which are ester waxes manufactured by Hoechst.
BJ, partially saponified wax WAX OP, WA
XOM, WAX V, WAX GL3, carnauba wax, Hoechst wax-V, Hoechst wax 2106
Is mentioned. Also, EVA which is a polyethylene wax containing an ethylene-vinyl acetate copolymer as a main component
1 WAX BASF, Diakarna 30L, 30K manufactured by Mitsubishi Kasei, High Wax 22 manufactured by Mitsui Petrochemical Co., Ltd.
0P, 660P, 1105A and the like. Also, μ
-Hydrooxo-μ-stearatobis (dichlorochromium (trivalent)) is excellent as an additive for improving the peeling properties when added to the cured resin layer.

Next, examples of the thermosetting resin include silicone resin, fluorine resin, melamine resin, amino alkyd resin, urea resin, xylene / formaldehyde resin, epoxy resin, phenol resin, and furan resin. Is a silicone resin, a fluorine resin, a melamine resin, an amino alkyd resin, and more preferably a silicone resin.

It is preferable to add a release agent in a ratio of 1 part by weight to 100 parts by weight with respect to 100 parts by weight of the thermosetting resin.
The release layer is obtained by dissolving this composition in an aromatic hydrocarbon such as toluene, xylene, ketones such as methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, esters such as ethyl acetate and methyl acetate, and alcohols such as propanol and butanol. It is formed by dissolving in a solvent, water or a mixed solvent thereof, applying by reverse coating, roll coating, gravure coating, kiss coating, blade coating, smooth coating, and the like, and then heating and curing.

The actinic ray-curable resin layer comprises actinic rays such as electron rays, visible rays, ultraviolet rays, infrared rays, X-rays,
A resin that is photopolymerized and cured by a laser beam or the like, and is a polyfunctional acrylate, a polyfunctional methacrylate,
Urethane acrylate, urethane methacrylate, polyester acrylate, polyester methacrylate,
It is formed by photopolymerizing a monomer or oligomer such as epoxy acrylate in the presence or absence of the following crosslinking agent and photoinitiator.

Examples of the crosslinking agent include melamine resins, benzoguanamine resins, methanol-modified melamine resins, amino resins such as urea resins, t-butyl hydroperoxide, di-
Organic peroxides such as t-butyl peroxide; aliphatic polyamines such as diethylenetriamine and tetraethylenepentamine; aromatic amines; tertiary amines such as dimethylaminomethylphenol; 2-methylimidazole; 2-ethyl-4-methylimidazole And the like. Further, a curing accelerator such as an organic metal compound, an organic silane, or a metal soap is also used.

Examples of the photoinitiator include 2-hydroxy-2-methyl-1-phenylpropan-1-one ("Darocur 1173" manufactured by Merck) and 1-hydroxycyclohexyl phenyl ketone (manufactured by Ciba Geigy). "Irgacure 184"), 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropane-1-
ON (“Darocure 1116” manufactured by Merck), benzyl methyl ketal (“Irgacure 6” manufactured by Ciba Geigy)
51 "), 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropanone-1 (" Irgacure 907 ", manufactured by Ciba-Geigy), 2,4-diethylthioxanthone (manufactured by Nippon Kayaku Co., Ltd.) "Kayacure DETX")
And ethyl p-dimethylaminobenzoate ("Kayacure EPA" manufactured by Nippon Kayaku Co., Ltd.), a mixture of isopropylthioxanthone ("Kuntacure ITX" manufactured by Ward Brekinsop Co.) and ethyl p-dimethylaminobenzoate, etc. But 2-hydroxy- which is liquid
2-Methyl-1-phenylpropan-1-one is particularly preferred in terms of compatibility with resin-forming materials such as monomers or oligomers.

The crosslinking agent is added in an amount of 0 to 20 parts by weight and a photoinitiator in an amount of 0 to 20 parts by weight based on 100 parts by weight of the monomer.

A release agent is added at a ratio of 1 part by weight to 100 parts by weight based on 100 parts by weight of the monomer, and aromatic hydrocarbons such as toluene and xylene, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone and the like are added. After dissolving in ketones, esters such as ethyl acetate and methyl acetate, alcohols such as propanol and butanol, water or a mixed solvent thereof, reverse coating, roll coating, gravure coating, kiss coating, blade coating After being applied by smooth coating or the like, it is cured by irradiation with actinic rays.

The thermosetting or thickness of the actinic radiation curable resin release layer 22, ^{is, 3g / m 2 ~20g / m} 2, preferably ^{5g / m 2 ~8g / m 2} .

The release layer 23 is a resin layer having releasability from the release layer 22. The release layer is peeled together with the image from the release layer when the image is transferred to the transfer object, and is a layer to be the outermost layer of the transfer object, so that it has flexibility and abrasion resistance, It is preferably made of a synthetic resin having heat resistance enough to withstand the heat and pressure in the transfer step. For example, water-soluble polyvinyl alcohol, gelatin, epoxy resin, melamine resin, phenol resin, fluorine resin, silicone resin, acrylic resin such as acrylic polyol,
Examples include ester resins, urethane resins, polyamide resins such as nylon, and cellulosic resins.

The release layer is formed by dissolving the above resin in a solvent such as aromatic hydrocarbons such as toluene and xylene, ketones such as methyl ethyl ketone and methyl isobutyl ketone, esters such as ethyl acetate and methyl acetate, and alcohols such as propanol and butanol. Dissolve the solution, reverse coating,
It is formed by applying and drying by roll coating, gravure coating, kiss coating, blade coating, smooth coating, and the like.

The coating amount of the release layer is 0.1 g / dry weight.
m ² ~10g / m ^2, preferably from 0.1g / m ² ~1.
0 g / m ² , particularly preferably 0.2 g / m ^{2 to} 0.5 g
/ M ² . If the coating amount is more than 10 g / m ² , the original surface characteristics are impaired when the image is transferred to a transfer-receiving member, which is not preferable.

A matting layer may be provided on the release layer 23. The matting layer forms irregularities on the surface layer of the image transfer electrostatic recording medium so that the movement of the image transfer electrostatic recording medium is not hindered even if it is sucked into the slit during slit development. With the goal.

The matting layer is formed by dispersing inorganic or organic fine particles in a binder, and then coating the same. Examples of the fine particles include inorganic fine particles such as silica, titanium oxide, calcium carbonate, talc, kaolinite, and mica, acrylonitrile polymers, acrylate polymers, polymer particles of a hydrophobic resin such as polystyrene, polyacrylic acid, polyacrylamide, and polyamide. And polymer particles of hydrophilic resins such as polyvinyl alcohol and gelatin, or finely pulverized products and emulsions of these resins. Examples of the binder include synthetic resins such as acrylate resin, methacrylate resin, butyral resin, silicone resin, styrene resin, acrylonitrile resin, and polycarbonate resin, and hydrophilicity such as polyacrylic acid, polyacrylamide, polyamide, polyvinyl alcohol, and gelatin. Resins, phenolic resins, furan resins, xylene / formaldehyde resins, epoxy resins,
Examples thereof include thermosetting resins such as melamine resins, and mixtures and copolymers of these resins can also be used.

The fine particles have an average particle size of 100 μm to 1 μm.
0 μm, preferably 500 nm to 5 μm, more preferably 700 nm to 3 μm, and preferably 1 to 500 parts by weight, preferably 10 to 200 parts by weight, based on 100 parts by weight of the resin. As the number increases, problems such as image fogging tend to occur.

The matting layer is formed by dispersing a binder and fine particles in an organic solvent to form a coating solution, and performing reverse coating, roll coating, gravure coating,
It is performed by applying by kiss coating, blade coating, smooth coating, etc., and drying by heating.

The coating amount of the matting layer is 0.1% by dry weight.
^{g / m 2 ~10g / m 2} , preferably 0.5 g / m ² ~
5 g / m ^2, more preferably from ^{1g / m 2 ~2g / m 2} . If the coating amount is more than 10 g / m ² , the original surface characteristics are impaired when the image is transferred to a transfer-receiving member, which is not preferable.

Further, the functions of the matte layer and the release layer may be integrated, and a matte release layer may be used instead of the release layer and the matte layer. The matted release layer may be formed in the same manner as the release layer by mixing the above-mentioned fine particles with the material used for forming the above-described release layer. The application amount of the matte release layer is the same as that of the release layer.

Instead of providing a matting layer, the same effect can be obtained by using a substrate sheet having irregularities on its surface as a base sheet or by mixing fine particles into a release layer to form a mat. Instead of adding fine particles as a matting means, a plate having an uneven surface may be pressed against the surface of the layer requiring matting to form an uneven surface.

Although the degree of the irregularities on the irregular surface varies depending on the type of the developing device, the surface smoothness is about 10 to 1000 seconds in Beckman smoothness, and the surface roughness Rz (10-point average roughness JIS- B06010) is 1
The thickness is preferably from 00 nm to 10 μm.

For the purpose of improving image transferability, an adhesive layer may be formed in advance on the surface of the above-mentioned electrostatic recording medium for image transfer before forming an image. However,
Such an adhesive layer does not show adhesive or sticking properties at the time of storage or at the time of forming an image, and needs to show adhesiveness or sticking properties only when it is thermocompression-bonded to a transfer receiving body. . Further, instead of providing the adhesive layer on the surface of the electrostatic recording medium for image transfer, the adhesive layer may be provided on the surface of a transfer-receiving body described later.

As the adhesive layer, for example, synthetic rubber such as styrene butadiene rubber, acrylic resin, methacrylic resin, polyvinyl ether resin, vinyl acetate resin, vinyl chloride resin, vinyl chloride-vinyl acetate copolymer resin, styrene resin A thermoplastic resin such as a resin, a polyester resin, a polyamide resin, and a polyvinyl butyral resin is dissolved in a solvent and formed by coating.

The coating amount of the adhesive layer was 1 g / m ² in terms of dry weight.
３０30 g / m ² , preferably 2 g / m ² １５15 g / m ²
It is. If the coating amount is more than 30 g / m ² , the original surface characteristics of the material to be transferred are undesirably deteriorated. In addition, an adhesion-enhancing layer having a large adhesive strength is formed around the adhesive layer, so that it is possible to prevent the transferred object from peeling off from the periphery after the transfer to the transferred object. As the adhesion reinforcing layer, among the above-mentioned materials for the adhesion layer, it is preferable to use a material having particularly excellent adhesion strength. In the case where the image quality is deteriorated or deteriorated by the adhesive layer, the adhesive layer may not be provided on the entire surface, and may be formed only on the periphery where the image is not formed. Deterioration and the like can be prevented.

The conductive layer 24 provided on the opposite surface of the base sheet is made of an ion-conductive or electron-conductive material, such as a cationic polymer electrolyte such as polyvinylbenzyltrimethylammonium chloride or an anionic conductive layer. It is preferable that a polymer electrolyte, a surfactant, and conductive fine particles of a metal or a metal oxide be mixed with a polymer binder and applied to a base sheet to form the mixture. Further, the above materials may be formed into a film on a base sheet by vacuum evaporation and sputtering. The surface resistance of the conductive layer is preferably set to 10 ¹¹ Ω or less. If it is larger than 10 ¹¹ Ω, the ion pattern is disturbed by stripping discharge, fogging or the like occurs, and a problem occurs in image quality. As an example of the combination of the base sheet 21 and the conductive layer 24, an electrostatic recording paper manufactured by forming a dielectric layer on conductive paper may be used.

Next, when a synthetic resin film is used as a base sheet, its film thickness becomes large from the viewpoint of supportability, but it acts as a dielectric when forming an image by ion images, and A high voltage is charged, causing discharge. In the case of such an obstacle due to discharge, the conductive layer may be arranged on the side of the base sheet on which the ion image is formed.

Such an image transfer electrostatic recording medium is shown in FIG.
Shown in In the figure, the same reference numerals as those in FIG. 1 indicate the same contents. The electrostatic recording medium for image transfer includes a base sheet 21, a conductive layer 2
4. It has a structure in which a curable resin release layer and a release layer are sequentially provided, and the curable resin release layer and the release layer are formed on the conductive layer 24 as shown in FIG.
May be formed in the same manner as shown in FIG. Further, a matting layer, a matting release layer, an adhesive layer, and an adhesion reinforcing layer may be provided on the release layer in the same manner as shown in FIG.

Further, instead of the combination of the base sheet 21 and the conductive layer 24 in FIG. 2, a base sheet itself having conductivity, for example, conductive paper may be used. Examples of conductive paper include inorganic salts such as sodium chloride, cationic polymer electrolytes such as polyvinylbenzyltrimethylammonium chloride, anionic polymer electrolytes, surfactants, zinc oxide, and metals such as zinc oxide that has been subjected to conductive treatment. Impregnated or coated with an oxide semiconductor to have a surface resistance of 10 ⁵ to 1
0 ¹¹ and the paper. Further, electrostatic recording paper may be used as the conductive paper in which the base sheet itself has conductivity.

The image forming surface of the above-described electrostatic recording medium for image transfer of the present invention has an A
The electrical resistance value specified by STM D257 is 1 × 10 ¹²
Ω · cm to 1 × 10 ¹⁷ Ω · cm (65% humidity, 25 ° C)
It is assumed that

Next, the method for forming an image on the electrostatic recording medium for image transfer according to the present invention will be described. The method for recording on the electrostatic recording medium for image transfer of the present invention includes forming an ion pattern by an ion stream, and developing the formed ion pattern with a wet developer containing a colorant to form a transfer image. Is preferred.

FIG. 3 shows an example of the ion pattern image forming apparatus.
Shown in The ion pattern image forming apparatus 1 has a recording head 2 for irradiating an ion stream, and a peripheral portion of a finger electrode is applied by a high frequency voltage applied between a line electrode 4 and a finger electrode 5 stacked via a dielectric 3. To generate positive and negative ions 6, and an electric field formed between the finger electrode 5 and the electrostatic image recording medium (recording medium) 7 for image transfer forms an ion stream 8, and the static electricity by the ions is formed on the recording medium. An electric image is formed, and a voltage is applied to the screen electrode 9 to isolate the finger electrode from the electrostatic image formed on the recording medium.

FIG. 4 is a perspective view showing an example of a recording head. Line electrode 4, finger electrode 5, and insulator 1
The screen electrode 9 is stacked through the holes 0, and the ion current flows through the holes 11 formed in the screen electrode. This shows a solid discharge type head. The recording head has a built-in driver circuit for applying a voltage for controlling the ion current to the finger electrodes to each hole. This driver circuit can apply a voltage pulse for ion flow passage to each ion flow passage hole with a pulse width of 256 steps, whereby 256 steps of gradation control are realized for each dot.

For recording an image by an ion current, a corotron discharge type head shown in FIG. 5 can be used. The corotron discharge type head 12 generates ions by a discharge electrode 14 provided in a metal container 13, and generates an ion current according to an image to be formed by an ion flow adjustment electrode 16 provided on both surfaces of a dielectric 15. 8 has been adjusted.

The control of the ion flow in this recording method is as follows.
It is performed by forming a charge pattern on the recording medium by controlling the electric field of the ions generated by the discharge, but the voltage control that controls the voltage applied between the electrode plates for controlling the ion flow, or the electrode plate By controlling the pulse width to control the time of the voltage pulse applied between the dots, it is possible to control the gradation of each dot, and this can be obtained by the conventional method of forming an image by electrostatic means such as an electrostatic plotter. It is possible to form a gradation image that has not been provided. Therefore, the recording dots are modulated dot by dot in a halftone print,
The gradation density control and gradation reproduction capability for simultaneously controlling the volume gradation and the area gradation for each dot enable fine reproduction of an edge portion and the like, and increase the effective resolution. As a result, the size of the dot can be changed in a short time of several microseconds, so that halftone dot gravure tone expression is possible. In addition to these, the fact that the dots keep a sharp shape without the influence of the history even at the edge portion of the line drawing is more advantageous compared to the thermal sublimation recording method in which tailing or the like easily occurs due to the influence of the thermal history. Is a point.

It is possible to form an electrostatic pattern without using a mask pattern by using an electrostatic plotter or the like. In this case, however, a binary image is generally formed and the gradation expression is limited. Would. Further, when the gradation is expressed by performing image processing other than binary by removing the regulation of the printing speed, the gradation or the resolution is also limited because of the pseudo gradation expression.

The method of recording an image by ion flow is as follows.
In addition to being able to control the gradation for each recording dot, there is no need to worry about increased running costs due to the large consumption of ink film as in the thermal sublimation recording method, so this recording method can provide full-color images at high quality and at low cost. Yes, and
Image information electronically processed by a computer or the like can be transferred onto various substrates to form an image.

Further, as a method of recording on the electrostatic recording medium for image transfer of the present invention, for example, an electrophotographic method may be adopted in addition to the method of forming an ion pattern by an ion flow. In this case, even when recording is performed by controlling the amount of recording light (for example, laser light), the recording light intensity and the irradiation time, and controlling the size of the electrostatic latent image and the amount of charge for each pixel, recording is performed. Is possible. Further, the electrostatic recording medium for image transfer of the present invention can also be used for an image forming method by an electrostatic printer using a multi-stylus head.

Next, a developing method for producing the electrostatic recording medium for image transfer of the present invention will be described. The developing method can be performed by a roller developing method or a slit developing method using a wet type developer. In color development, C, M, Y or C, M, Y, B
A color image can be formed by repeatedly forming and developing an ion image of three or four colors of k.

The wet developer is obtained by dispersing a colorant, a fixing resin, and a charge control agent in an electrically insulating liquid. If necessary, a dispersion stabilizer, a resin for improving charging characteristics, a color superimposition improver, etc. Is added.

As the coloring agent, known organic or inorganic pigments or sublimable dyes can be used. The pigment will be described. Examples of black pigments include inorganic carbon black, triiron tetroxide, and organic cyanine black.

As the yellow pigment, inorganic graphite,
Cadmium yellow, yellow iron oxide, titanium yellow, ocher and the like. Examples of the acetoacetic anilide-based monoazo pigments of poorly soluble metal salts (azo lakes) include Hanza Yellow G (CINo. Pigment Yellow 1, the same applies hereinafter), Hanza Yellow 10G (Pigment Yellow 3),
Hansa Yellow RN (Pigment Yellow 65), Hansa Brilliant Yellow 5GX (Pigment Yellow 7
4), Hansa Brilliant Yellow 10GX (Pigment
Yellow 98), permanent yellow FGL (Pigmen
t Yellow 97), Shimura Lake Fast Yellow 6G
(Pigment Yellow 133), Lionol Yellow K-
2R (Pigment Yellow 169) and azoacetoacetic anilide disazo pigments include Disazo Yellow G (Pig)
ment Yellow 12), Disazo Yellow GR (Pigment
Yellow 13), Disazo Yellow 5G (Pigment Yel)
low 14), Disazo Yellow 8G (Pigment Yellow)
17), Disazo Yellow R (Pigment Yellow 5)
5), Permanent Yellow HR (Pigment Yellow 8)
3).

Examples of the condensed azo pigment include Chromophthal Yellow 3G (Pigment Yellow 93), Chromophthal Yellow 6G (Pigment Yellow 94), and Chromophthal Yellow GR (Pigment Yellow 95). Further, benzimidazolone monoazo pigments include Hosta Palm Yellow H3G (Pigment Yellow 154),
Hosta Palm Yellow H4G (Pigment Yellow 15
1) Hosta Palm Yellow H2G (Pigment Yellow)
120), Hosta Palm Yellow H6G (PigmentYell)
ow 175), Hosta Palm Yellow HLR (Pigment
Yellow 156). Further, as the isoindolinone-based pigment, Irgazine Yellow 3RLTN (P
igment Yellow 110), Irgazine Yellow 2RL
T, Irgazine Yellow 2 GLT (Pigment Yellow 1
09), Fastogen Super Yellow GROH (Pig
ment Yellow 137), Fastogen Super Yellow GRO (Pigment Yellow 110), Sandrin Yellow 6GL (Pigment Yellow 173), and flavantron (Pigment Yel) which is a slen-based pigment.
low 24), anthramirimidine (Pigment Yellow 1)
08), phthaloylamide-type anthraquinone (Pigment
Yellow 123), Heliofast Yellow E3R (P
igment Yellow 99), an azo-based nickel complex pigment (Pigment Green 10) as a metal complex pigment, a nitroso-based nickel complex pigment (Pigment Yellow 153), an azomethine-based copper complex pigment (Pigment Yellow 117), and a phthalimidoquinophthalone pigment as a quinophthalone pigment (Pig
ment Yellow 138).

Examples of the magenta pigment include inorganic cadmium red, red iron oxide, silver vermilion, lead red, and antimony vermilion. As the azo lake-based azo pigments, brilliant carmine 6B (Pigment Red 57:
1), Lake Red (Pigment Red 53: 1), Permanent Red F5R (Pigment Red 48), Lisor Red (Pigment Red 49), Persian Orange (Pigme Red)
nt Orange 17), Black Orange (Pigment Orange)
18), Helio Orange TD (Pigment Orange 1)
9), Pigment Scarlet (Pigment Red 60:
1), Brilliant Scarlet G (Pigment64:
1), Helio Red RMT (Pigment Red 51), Bordeaux 10B (Pigment Red 63), Helio Bordeaux BL
(Pigment Red 54). Examples of the insoluble azo type (monoazo, disazo type, condensed azo type) include para red (Pigment Red 1) and Lake Red 4R (Pigme Red).
nt Red3), permanent orange (Pigment Orange)
5), permanent red FR2 (Pigment Red2),
Permanent Red FRLL (Pigment Red 9), Permanent Red FGR (Pigment Red 112), Brilliant Carmine BS (Pigment Red 114), Permanent Carmine FB (Pigment Red 5), P.I. V. Carmin HR (Pigment Red 150), Permanent Carmin FBB (Pigment Red 146), Nova Palm Red F3
RK-F5RK (Pigment Red 170), Nova Palm Red HFG (Pigment Orange 38), Nova Palm Red HF4B (Pigment Red 187), Nova Palm Orange HL. HL-70 (Pigment Orange 36);
V. Carmine HF4C (Pigment Red 185), Hosta Balm Brown HFR (Pigment Brown 25), Vulcan Orange (Pigment Orange 16), Pyrazolone Orange (Pigment Orange 13), Pyrazolone Red (p
igment Red 38) and Chromophtal Orange 4R (Pigment Orange 3) as a condensation azo pigment.
1), Chromophtal Scarlet R (Pigment R ed)
166), Chromophtal Red BR (Pigment Red 1)
44).

As an anthraquinone pigment which is a condensed polycyclic pigment, Pyranthrone Orange (Pigment Orange)
40), Anto Anthrone Orange (Pigment Orange)
168), dianthraquinonyl red (Pigment Red1)
77), and thioindigo-based pigments include thioindigo magenta (Pigment Violet 38), thioindigo violet (Pigment Violet 36), and thioindigo red (Pigment Red 88). Perinone-based pigments include perinone orange (Pigment Orange 43). And perylene pigments such as perylene red (Pigment Red 190) and perylene vermillion (Pig)
ment Red123), Perylene Maroon (Pigment Red1)
79), Perylene scarlet (Pigment Red14)
9) and perylene red (Pigment Red 178), and quinacridone red (P
igment Violet19), quinacridone magenta (Pigme
nt Red 122), Quinacridone Maroon (Pigment Red
206), quinacridone scarlet (Pigment Red2
07). In addition, examples of condensed polycyclic pigments include pyrocholine pigments, red fluorbin pigments, and dyeing lake pigments (water-soluble dye + precipitant → lake fixing).

Examples of cyan pigments include inorganic ultramarine blue, navy blue, cobalt blue, cerulean blue, and the like.
Also, as a phthalocyanine-based, Fast Gemble-B
B (Pigment Blue 15), Sumiton Cyanine Blue HB (Pigment Blue 15), Cyanine Blue 502
0 (Pigment Blue 15: 1), Sumika Print Cyanine Blue GN-O (Pigment Blue 15), Fast Sky Blue A-612 (Pigment Blue 17),
Cyanine Green GB (Pigment Green 7), Cyanine Green S537-2Y (Pigment Green 36), Sumiton Fast Violet RL (Pigment Violet)
And indanthrone blue (PB-60P, PB-22, PB-2)
1, PB-64), a basic dye lake pigment methyl violet phosphorus molybdate lake (PV-3)
And the like. In addition, a coloring agent called a so-called processed pigment in which a resin is coated on the surface of the pigment can be used in the same manner. In place of the pigment, a dye which diffuses, melts, or sublimates by heat and transfers to the cloth from the recording medium for image transfer may be used. As such a dye, a disperse dye is particularly preferably used, and is about 150 to 550. Sublimation or melting temperature,
The selection is made in consideration of hue, light resistance, solubility in a resin and a developer, and the like.

For example, diarylmethane, triarylmethane, thiazole, methine, azomethine, xanthine, oxazine, azo and azo derivatives,
Anthraquinone derivative, quinophthalone derivative, spirodipyran-based, isodrinospyropyran-based, fluoran-based,
Rhodamine lactam dyes are preferably used.

More specifically, C.I. I. Disperse Yellow 51, 3, 54, 79,
60, 23, 7, 141, C.I. I. Disperse Blue 24, 56, 14, 301, 334, 165, 19,
72, 87, 287, 154, 26, 359 C.I. I.
Disperse threads 135, 146, 59, 1, 73,
60, 167 C.I. I. Disperse Violet 4,
13, 26, 36, 56, 31 C.I. I. Solvent Violet 13 C.I. I. Solvent Black 3C.
I. Solvent Green 3 C.I. I. Solvent Yellow 56, 14, 16, 29, 105 C.I. I. Solvent Blue 70, 35, 63, 36, 50, 49, 11
1, 105, 97, 11C. I. Solvent Red 13
5, 81, 18, 25, 19, 23, 24, 143, 1
46, 182 and the like.

Further, 3,3-diethyloxacyanine iodide, Astrazone Pink FG (manufactured by Bayer AG,
C. I. 48015), 2,2-carbocyanine (C.I.
I. 808), Astraphyloxine FF (C.I.1)
48070), Astrazon Yellow 7GLL (C.I.
I. Basic Yellow 21), Aizen Carotene Yellow 3GLH (Hodogaya Chemical, CI.48055),
Aizen Carotene Red 6BH (CI. 4802)
0), methine (cyanine) basic dyes such as monomethine, dimethine or trimethine, diphenylmethane basic dyes such as auramine (CI.655), and malachite green (CI.42000) ,
Brilliant green (C.I. 42040), magenta (C.I. 42510), methyl violet (C.I.
I. 42535), crystal violet (C.I.
42555), methyl green (C.I.684), Victorian blue B (C.I.44045) and other triphenylmethane-based basic dyes, and pyronin G (C.I.73).
9), xanthene-based basic dyes such as rhodamine B (CI. 45170) and rhodamine 6G (CI. 45160), acridine yellow G (CI. 785), and leonine AL (CI. 46075). Benzoflavin (CI.791), affine (CI.46045)
Acridine-based basic dyes, neutral red (CI.50040), Astrazone Blue BGE /
X125% (CI. 50005), quinone imine-based basic dyes such as methylene blue (CI. 52015), and other basic dyes such as anthraquinone-based basic dyes having a quaternary amine.

These dyes can be used as they are or in a form in which these dyes have been treated with alkali, and a counter ion exchanger or a leuco form of these dyes can also be used. When a colorless or pale-colored leuco dye or the like is used in a normal state, a developer may be included in the electrostatic recording medium side.

These disperse dyes are used not only with one component but also when two or more kinds are mixed. In particular, when mixed and melted, the thermal behavior greatly differs depending on what kind of mixture they form, and the vapor pressure also changes uniquely depending on the composition ratio, so the melting point temperature decreases. When it occurs, the activation energy is small and the sublimation sensitivity can be improved. The content of the colorant in the wet developer is from 0.1% by weight to 5% by weight.

The fixing resin is selected in consideration of a combination of an electric insulating liquid, a colorant, a charge control agent, a dispersion stabilizer, and the like, which will be described later.
Any material can be used as long as it can fix and hold the colorant on the recording medium. Specifically, acrylic, styrene, ethylene, vinyl, rubber-based resin, rubber, or a copolymer thereof can be used alone or in combination,
When yellowing or deterioration is not visually observed when heating and pressing on the transfer target, it can be used. In particular, ethylene-vinyl acetate copolymer (EV
A), a partially saponified product, a carboxylated modified product thereof, or a polymer or copolymer such as an esterified product such as acrylic acid or methacrylic acid can be used. The content of the fixing resin in the wet developer is from 0.02% by weight to 5% by weight.

As the charge control agent, any charge control agent which decomposes under thermal transfer conditions and does not harm the human body can be used. For example, metal dialkyl sulfosuccinate, manganese naphthenate, calcium naphthenate, zirconium naphthenate, cobalt naphthenate, iron naphthenate, lead naphthenate, nickel naphthenate, chromium naphthenate, zinc naphthenate, magnesium naphthenate, octylate Manganese, calcium octylate, zirconium octylate, iron octylate, lead octylate, cobalt octylate, chromium octylate, zinc octylate, magnesium octylate, manganese dodecylate, calcium dodecylate, zirconium dodecylate, iron dodecylate, Metal soaps such as lead dodecylate, cobalt dodecylate, nickel dodecylate, chromium dodecylate, zinc dodecylate, magnesium dodecylate, calcium dodecylbenzenesulfonate, dodecylbenzenesulfate Sodium phosphate,
Alkylbenzenesulfonates such as barium dodecylbenzenesulfonate; phospholipids such as lecithin and sekhalin; n
-Organic amines such as decylamine. Preferably, naphthenic acid, metal salts of octylic acid,
Particularly preferred is zirconium naphthenate. The content of the charge control agent to be added to the wet developer is affected by the added material and the like.
It is 1% by weight to 2% by weight.

As the electrically insulating liquid, a hydrocarbon-based highly insulating liquid can be used, and examples thereof include n-paraffinic hydrocarbons, iso-paraffinic hydrocarbons, or mixtures thereof, and halogenated aliphatic hydrocarbons. Can be Particularly preferred are branched-chain aliphatic hydrocarbons, and it is preferable to use, for example, Isopar G, Isopar H, Isopar K, Isopar L, Isopar M, Isopar V, etc. manufactured by Exxon. These liquid aliphatic hydrocarbons are electrically insulating liquids, have a volume resistance of 10 ¹⁰ Ω · cm or more, and are used for the purpose of increasing the electric insulation in a wet developer, Further, it is required that the dissolving power with respect to the wet developer component is relatively small, thereby preventing deterioration.

Next, a description will be given of a method of transferring an image to an object using the electrostatic recording medium for image transfer of the present invention. The transfer target suitable for transferring an image using the image transfer electrostatic recording medium of the present invention, cloth, paper, synthetic resin film,
Although leather and the like are used, when a sublimable dye is used as a coloring agent, a material having excellent coloring properties, for example, a cloth made of polyester, coated paper, a synthetic resin film, or leather is preferable.

In the transfer, the thermocompression bonding method is preferably carried out using a hot roll, and the conditions can be set as appropriate according to the characteristics of the electrostatic recording medium for image transfer and the material to be transferred. However, at a temperature of 100 to 200 ° C., preferably 120 to 180 ° C., and a linear pressure of 3 to 30 kg /
cm, preferably 5 to 15 kg / cm, and the feed speed of the hot roll is 20 m / min or less, preferably 5 to 15 m / min. If the transfer temperature is lower than 100 ° C., the adhesiveness between the adhesive layer and the transfer-receiving body or between the adhesive layer and the image forming surface of the electrostatic recording medium for image transfer cannot be sufficiently obtained, and uniform transfer cannot be performed. On the other hand, when the temperature exceeds 200 ° C., an electrostatic recording medium for image transfer,
Alternatively, deformation or alteration of the transferred object occurs.

In the above-described image transfer electrostatic recording medium, in the case of an image transfer electrostatic recording medium having an adhesive layer on the outermost layer, the image transfer electrostatic recording medium and the image receiving medium are separated. Although it is preferable to make close contact, it is preferable to provide an adhesive layer on the surface of the transfer-receiving member or to transfer an image to the electrostatic transfer member for image transfer in the case of an electrostatic transfer member for image transfer without an adhesive layer. After the formation, an adhesive layer may be provided on the image. After the adhesive layer is provided, the image may be transferred to a transfer target by closely contacting the same transfer method as described above.

The adhesive layer provided on the surface of the transfer-receiving material is a thermoplastic resin capable of favorably transferring an image to the transfer-receiving material, such as isoprene rubber, isobutyl rubber, styrene butadiene rubber, butadiene acrylonitrile rubber. Synthetic rubber, acrylic resin, methacrylic resin, polyvinyl ether resin, vinyl acetate resin, vinyl chloride resin, vinyl chloride-vinyl acetate copolymer resin, styrene resin, polyester resin, polyamide resin, polyvinyl butyral resin, etc. For example, it is mixed with an organic solvent that does not destroy the colored image formed on the electrostatic recording medium for image transfer, or applied and formed in the form of an aqueous emulsion.

The thickness of the adhesive layer is 1 to 30 g / dry weight.
m ² , preferably 3 to 15 g / m ² . If the thickness of the adhesive layer is 1 g / m ² or less, sufficient adhesive strength cannot be obtained. If it exceeds 30 g / m ² , the properties of the original surface of the transferred body will be impaired.

After the image is transferred, the image is transferred from the release layer and the release layer of the electrostatic recording medium for image transfer to obtain a transfer object on which the image is transferred. In the present invention, an excellent transfer method that has sufficient image transfer characteristics and does not cause thermal fusion regardless of the type of the transfer object can be achieved. In the transfer, if the adhesive strength of the image to the transferred object is not sufficient in the thermal transfer in the heat roll process, the transferred object after peeling is hot pressed using a heating plate to increase the adhesive force. Good.

In the above description, the image recorded on the image-transfer electrostatic recording medium is directly transferred to a transfer-receiving object such as cloth, paper, synthetic resin film, and leather. After transferring the electrostatic latent image to a secondary transfer member such as electrostatic recording paper, the latent image on the secondary transfer member is developed, and then using the secondary transfer member, a target cloth, paper, The image may be transferred to a synthetic resin film, leather or the like. Further, after an image obtained by developing the latent image formed on the image transfer electrostatic recording medium is temporarily transferred to a secondary transfer body such as transfer paper, a cloth intended for the image on the secondary transfer body, It may be transferred to paper, synthetic resin film, leather or the like. Hereinafter, examples of the present invention will be described, and the present invention will be described in more detail.

[0076]

【Example】

(Example 1) (Preparation of electrostatic recording medium for image transfer) Coating amount after drying quaternary ammonium-containing conductive resin (Chemistat 6300H manufactured by Sanyo Chemical Co., Ltd.) on the surface of high-quality paper having a basis weight of 55 g / m ^2. Is applied by a gravure reverse method using a gravure coater so that the coating amount is 3 g / m ² , and is applied on the back surface so that the coating amount after drying is 2 g / m ² .
A conductive paper was produced.

Next, a solution having the following composition was applied to the surface of the obtained electroconductive recording paper by means of a miller bar so as to have a dry weight of 1 g / m ² , the solvent was removed by blowing air from a dryer, and the light was collected. Using an 80 mW ultraviolet lamp of formula, irradiation amount 150 mJ / cm ² , belt speed 6 m / min.
To form a release layer.

Acrylamide UV curable resin (upimer-LZ-065, manufactured by Mitsubishi Fine Corporation) 20 parts by weight Release agent (μ-hydrooxo-μ-stearatobis (dichlorochrome (trivalent))), DuPont 8 parts by weight Initiator (benzyldimethyl ketal) ... 0.6 parts by weight Dispersant (polyoxyethylene) ... 20 parts by weight Solvent (methyl ethyl ketone) ... 20 parts by weight Solvent (isopropyl) alcohol) 5 parts by weight solvent (water) ... 0.5 parts by weight Furthermore, to the obtained release layer, applying a solution of the following composition to a dry weight is 5 g / m ² Forming a release layer,
An electrostatic recording medium for image transfer according to the present invention was produced.

Resin (polyvinyl chloride resin): 10 parts by weight Plasticizer (dioctyl phthalate): 5 parts by weight Solvent (methyl isobutyl ketone): 85 parts by weight (Image forming method and developing method) A negative ion pattern (−40 V) is applied to the obtained electrostatic recording medium for image transfer using the ion current irradiation recording apparatus shown in FIG. 3 based on cyan information obtained by color separation of a color original image. Formed.

The recording head of this ion flow irradiation recording apparatus has 1,728 ion flow passage holes, and enables recording of A4 width at a recording density of 200 DPI.

The image-recording electrostatic recording medium having the ion pattern formed thereon was developed by a roller developing device having the following cyan developer to obtain an image-transfer electrostatic recording medium having a cyan image.

(Cyan developer) 2-ethylhexyl methacrylate-acrylic acid copolymer resin (2-ethylhexyl methacrylate / acrylic acid (weight ratio) = 85/1)
5, weight average molecular weight 131,000), 5 parts by weight, Mo
nasutral Blue FGX (CI Pig
Ment Blue 15: 4 manufactured by Seneca), 5 parts by weight,
A composition comprising 5 parts by weight of zirconium naphthenate (manufactured by Nippon Chemical Industry) is charged into 100 g of tetrahydrofuran, and then an ultrasonic homogenizer (manufactured by Nippon Seiki Seisakusho)
The copolymer resin was dissolved using US-300T) and dispersed at room temperature. Next, 300 g of Isopar G (manufactured by Exxon Corporation) was charged under the operation of an ultrasonic homogenizer, and tetrahydrofuran was removed by a rotary evaporator to obtain a wet developer having a solid content of 1.4%.

Next, based on the magenta information obtained by performing color separation of the color original image, a negative ion pattern (-4
0V), and then developed with a roller developing device having the following magenta developer to obtain an electrostatic transfer medium for image transfer having a cyan image and a magenta image.

(Magenta developer) Modified ethylene-vinyl acetate copolymer (modified EVA) as resin in a 200 ml round bottom flask (Dumilan 2270 manufactured by Takeda Pharmaceutical Co., Ltd.)
2.7 g, 60 mg of a charge control agent cobalt dialkyl sulfosuccinate, and 1 part of tetrahydrofuran as a solvent.
50 ml was added. This solution is heated to a resin dissolution temperature of 60 to 80.
The mixture was heated and stirred at ℃ for 1 hour. Note that cobalt dialkyl sulfosuccinate was produced by reacting sodium dialkyl sulfosuccinate (Aerosol OT, manufactured by Wako Pure Chemical Industries, Ltd.) with cobalt nitrate in a non-aqueous solvent. As the resin capable of being granulated, modified EVA is optimal, and Dumiran 2270 is used particularly in consideration of adhesive properties. Some Dumilan series had different degrees of partial saponification, and all of them could be used.

Separately, Brilliant Carmine 6B (Sumika Print Carmine 6BF) was used as a coloring agent in a 200 ml beaker.
1.0, manufactured by Sumika Color Co., Ltd.) and 1.0 g of poly-1 as a dispersant
60 mg of 2-hydroxystearic acid methyl ester (trimer of Ito Oil Co., Ltd.) in 100 ml of tetrahydrofuran
Was dispersed as a solvent. For the dispersion, a desktop ultrasonic homogenizer (Nippon Seiki UHS-300T) was used. This dispersion was put into the flask prepared at one time.
Mixing and stirring was further performed at 60 to 80 ° C. for 1 hour to obtain a pigment dispersion. 200 ml of Isopar G (manufactured by Exxon Co.) cooled to a temperature of 10 ° C. was prepared in a 500 ml beaker, and the previously prepared pigment dispersion was charged into the beaker while being dispersed with an ultrasonic homogenizer. Thus, granulation utilizing the solubility of the resin was performed. Solvent replacement between tetrahydrofuran and Isopar G was carried out by decantation or centrifugation to completely replace Isopar G with a wet developer.
This wet developer was further adjusted to a print density of 1% using Isopar G.

(Preparation of Transferred Body) A vinyl resin emulsion (manufactured by Chuo Rika Kogyo Co., Ltd., Ricabond BE-7) was applied to the surface of a high-quality paper having a basis weight of 55 g / m ² after drying.
g / m ² was applied with a miller bar and dried to form an adhesive layer, thereby preparing a transfer-receiving body.

(Transfer Method) The image surface of the electrostatic recording medium for image transfer having the cyan image and the magenta image obtained above was superimposed on the adhesive layer surface of the transfer object obtained above, and a hot-press roller (160) was used. ° C, line pressure 20kg / cm, feed speed 2m
/ Minute), the transferred object was peeled off.

At the time of peeling, the peeling force between the release layer and the peeling layer in the image transfer electrostatic recording medium is light, and the image transfer electrostatic recording medium has little transfer residue and is excellent in transferability. there were.

(Example 2) An image was formed in the same manner as in Example 1 except that the following composition was applied as a release layer to a dry weight of 1 g / m ² with a bar and dried. A transfer electrostatic recording medium was prepared.

Cellulose acetate resin (manufactured by Daicel, LAC-30): 1 part by weight Solvent (methyl ethyl ketone): 70 parts by weight Solvent (ethylene glycol monomethyl ether): 15 parts by weight Solvent (cyclohexanone) Using the electrostatic recording medium for image transfer, an image was formed in the same manner as in Example 1, and then the image was transferred to the transfer body manufactured in Example 1 as in Example 1. Upon peeling, the peeling force between the release layer and the peeling layer in the image transfer electrostatic recording medium was light, and the image transfer electrostatic recording medium had little transfer residue and was excellent in transferability.

Example 3 The same procedure as in Example 2 was carried out except that the following composition was used as a release layer by applying a composition with a bar and drying and curing the composition to a dry weight of 2 g / m ^2. Thus, an electrostatic recording medium for image transfer was produced.

Acrylamide UV curable resin (Upimer-LZ-065, manufactured by Mitsubishi Fine Corporation) 20 parts by weight Release agent {Carnauba wax (manufactured by Hoechst)} 5 parts by weight Initiator (benzyl) Dimethyl ketal) 0.6 parts by weight Dispersant (polyoxyethylene) 20 parts by weight Solvent (methyl ethyl ketone) 20 parts by weight Solvent (isopropyl alcohol) 5 parts by weight Solvent (water) 0.5 parts by weight An image was formed using this electrostatic transfer medium for image transfer in the same manner as in Example 1, and then the image was transferred to the transfer body manufactured in Example 1 in the same manner as in Example 1. Upon peeling, the peeling force between the release layer and the peeling layer in the image transfer electrostatic recording medium was light, and the image transfer electrostatic recording medium had little transfer residue and was excellent in transferability.

Example 4 The same procedure as in Example 2 was carried out except that the following composition was used as a release layer in Example 2 except that the following composition was coated with a bar with a dry weight of 2 g / m ² , dried and cured. Thus, an electrostatic recording medium for image transfer was produced.

Acrylamide UV curable resin (upimer-LZ-065, manufactured by Mitsubishi Fine Corporation) 20 parts by weight Release agent @ dimethyl silicone oil (Shin-Etsu Silicone KF96H) 0.2 parts by weight Initiator (benzyl dimethyl ketal) ... 0.6 parts by weight Dispersant (polyoxyethylene) ... 20 parts by weight Solvent (methyl ethyl ketone) ... 20 parts by weight Solvent (isopropyl alcohol) ... 5 parts by weight Solvent (Water)... 0.5 part by weight After using this electrostatic image recording material for image transfer to form an image in the same manner as in Example 1, the image was transferred onto the transfer body produced in Example 1 as in Example 1. Was transcribed. Upon peeling, the peeling force between the release layer and the peeling layer in the image transfer electrostatic recording medium was light, and the image transfer electrostatic recording medium had little transfer residue and was excellent in transferability.

(Comparative Example 1) In the release layer material in Example 1, a composition to which μ-hydrooxo-μ-stearatobis (dichlorochromium (trivalent)) was not added was used.
An electrostatic recording medium for image transfer was produced in the same manner as in Example 1 except that a release layer was produced in the same manner as in Example 1.

Using this image transfer electrostatic recording medium, an image was formed in the same manner as in Example 1, and then the image was transferred to the transfer member manufactured in Example 1 as in Example 1. After transferring the image,
An attempt was made to peel the transfer object, but the peeling was heavy and the transfer residue was large.

[0097]

According to the present invention, the electrostatic recording material for image transfer and the image transfer method of the present invention have no thermal fusion with the transfer object during transfer.
Good image transfer is possible, and it has an appropriate peeling property, and the transfer residue can be reduced. In particular, by forming an ion pattern on the image by an ion flow and developing the formed ion pattern with a wet developer containing a colorant, various types of electronically processed image information by a computer or the like can be obtained. It is possible to form an image by transferring the image onto a substrate, improve the productivity by shortening the time, and transfer the image to a transfer object of any shape.

Further, with respect to image expression, finer gradation expression can be performed on gradation printed matter than before, and a high-definition printed matter can be obtained. Furthermore, it is possible to produce a pattern or the like in a long winding endlessly, and the productivity is good.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of an electrostatic recording medium for image transfer of the present invention.

FIG. 2 is a schematic sectional view of another example of the electrostatic recording medium for image transfer of the present invention.

FIG. 3 is a diagram illustrating an example of an image forming apparatus using an ion flow.

FIG. 4 is a perspective view illustrating an example of a recording head.

FIG. 5 is a sectional view showing another example of the recording head.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Image forming apparatus, 2 ... Recording head, 3 ... Dielectric, 4 ...
Line electrode, 5 finger electrode, 6 ion, 7 recording medium, 8 ion flow, 9 screen electrode, 10 insulator, 11 hole, 12 corotron discharge head, 13
... metal container, 14 ... discharge electrode, 15 ... dielectric, 16 ...
Electrode for adjusting ion current, 20 ... Electrostatic recording medium for image transfer, 2
DESCRIPTION OF SYMBOLS 1 ... Base sheet, 22 ... Curable resin release layer, 23 ... Release layer, 24 ... Conductive layer

Claims (5)

[Claims] A curable resin release layer containing a release agent is provided on a base sheet having a conductive layer, a release layer is further provided on the release layer, and a surface resistance value of 1 × 10 is provided. ¹²
Ω to 1 × 10 ¹⁷ Ω, an electrostatic recording medium for image transfer. 2. An image transfer electrostatic recording medium wherein an ion pattern is formed by an ion flow, and the formed ion pattern is developed by a wet developer containing a colorant to form a transfer image. 2. The method according to claim 1, wherein
The electrostatic recording medium for image transfer according to the above. 3. The curable resin is an ultraviolet curable resin, and the release agent is at least one of wax, silicone oil, and μ-hydrooxo-μ-stearatobis (dichlorochrome (trivalent)). The electrostatic recording medium for image transfer according to claim 1 or 2, wherein: 4. A curable resin release layer containing a release agent and a release layer are sequentially provided on a base sheet having a conductive layer, and the surface resistance value is 1 × 10 ¹² Ω to 1 × 10 ¹⁷ Ω. After forming a transfer image on the image transfer electrostatic recording medium is
An image transfer method, comprising: thermocompression bonding an image to be transferred to an image on an electrostatic recording medium for image transfer onto an image to be transferred; 5. An image for transfer is formed by forming an ion pattern on an electrostatic recording medium for image transfer by an ion stream and developing the formed ion pattern with a wet developer containing a colorant. The image transfer method according to claim 4, wherein: