JPH11208124A - Image receiving sheet for thermal transfer recording - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image receiving sheet of strong glossiness for thermal transfer recording which has an image receiving layer containing activating energy beam cured resin cured by casting of an activating energy beam such as an electron beam or an ultraviolet ray, facilitating dyeing even with low energy, enabling attainment of an image of high density and, moreover, being excellent in a resistance to fusion. SOLUTION: In this image receiving sheet for thermal transfer recording, a coat layer constituted of an activating energy beam curing composition containing an activating energy beam curing organic compound of 5-80 wt.% which has a structure expressed by the formula [wherein R denotes hydrogen or methyl] is provided at least on one surface of a support, and this coat layer is cured by an activating energy beam.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal transfer recording image receiving sheet for a printer which transfers a sublimable dye by heat to form a dyed image. More specifically, the present invention relates to an image-receiving sheet for thermal transfer recording useful for printing a full-color image having excellent transfer density, blocking resistance, and gloss.

[0002]

2. Description of the Related Art In recent years, a thermal printer capable of printing a compact and clear full-color image, particularly a dye thermal transfer printer, has attracted attention. This dye thermal transfer printer is often used for OHP, card transfer, video, computer graphics, print proofing, etc. as the mainstream of small non-impact full color printers.

A dye thermal transfer printer superimposes a dye-coated resin-coated surface of an image-receiving sheet on a dye-coated surface of an ink sheet in which yellow, magenta, and cyan dye inks are coated on a film. The sublimation dye is transferred and dyed from a required location to a required density from the ink sheet by the heat supplied from the thermal head in accordance with the electric signal corresponding to the image to form an image.

An image receiving sheet which can form a clear image when used in a printer using such a thermal head has been developed. Conventional thermal transfer recording image-receiving sheet, paper, synthetic paper, a support such as a film filled with white pigment, polyester, polyamide, cellulose acetate,
An image receiving layer having a thermoplastic resin such as an acrylic resin as a main component is provided. Since these thermoplastic resins use a solvent for coating, there is a risk of explosion or ignition in the process, and there is also a problem of poisoning due to the solvent. On the other hand, in order to obtain high-quality image quality close to a photograph, development of an image receiving sheet having higher glossiness is also desired.

Japanese Patent Laid-Open No. 58-21 discloses a method in which the active energy ray-curable resin is used in place of part or all of the thermoplastic resin in the image receiving layer of the sublimation type thermal transfer recording sheet.
Nos. 2994, 62-173295 and 63
No. 74691, Japanese Patent Application Laid-Open No. 5-185746, and the like. However, in these methods, the transfer density of the sublimable dye was not sufficient.

[0006]

SUMMARY OF THE INVENTION The present invention relates to an active energy ray-curable resin cured by irradiation with an active energy ray such as an electron beam or an ultraviolet ray. It is another object of the present invention to provide a strong glossy heat transfer recording image-receiving sheet having an image-receiving layer having excellent blocking resistance.

[0007]

The present invention employs the following configuration in order to solve the above-mentioned problems. That is, the present invention provides a method for forming a coating layer comprising an active energy ray-curable composition containing 5 to 80% by weight of an active energy ray-curable organic compound having a structure of the following formula (general formula 1) on at least one surface of a support. And a thermal transfer recording image-receiving sheet, wherein the coating layer is cured by an active energy ray.

Embedded image In the above general formula 1, R represents hydrogen or a methyl group.

The high sublimation dye receptivity of the image receiving sheet of the present invention is based on the fact that the active energy ray-curable organic compound having an active energy ray-curable organic compound having a cyclopentane dimer skeleton used in the present invention has an affinity for the sublimable dye. It is considered that the dye on the ink donor sheet is easily received when heat is applied.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In the case where the active energy ray-curable organic compound having the structure of the general formula 1 is contained in the active energy ray-curable composition of the present invention in an amount of 5 to 80% by weight, the sublimation dye-accepting property is reduced. However, when the content is less than 5% by weight, the effect of the addition of the active energy ray-curable organic compound having the structure of the general formula 1 on the dye receiving property and the blocking resistance is small. If the amount is more than 10% by weight, the active energy ray-curable composition is insufficiently cured, and the surface of the image receiving layer becomes sticky and undesired portions are stained.

Hereinafter, the present invention will be described in detail. The active energy ray-curable organic compound used in the present invention is a compound having a cyclopentane dimer skeleton represented by the general formula 1.

The active energy ray-curable organic compound represented by the general formula 1 is not sufficiently cured when used alone. It is necessary to mix and use other general active energy ray-curable unsaturated organic compounds in order to promote the curing.

The general active energy ray-curable unsaturated organic compounds include: (1) aliphatic, alicyclic and araliphatic mono- to hexavalent alcohols and polyalkylene glycol (meth) acrylates ( 2) (Meth) acrylates obtained by adding an alkylene oxide to aliphatic, alicyclic and araliphatic mono- to hexavalent alcohols (3) Poly (meth) acryloylalkyl phosphates (4) Reaction product of polybasic acid, polyol and (meth) acrylic acid (5) Reaction product of isocyanate, polyol and (meth) acrylic acid (6) Reaction product of epoxy compound and (meth) acrylic acid (7) Epoxy compounds, polyols, reaction products of (meth) acrylic acid (8) Reaction products of melamine and (meth) acrylic acid

More specifically, the general active energy ray-curable unsaturated organic compounds described above are methyl acrylate, ethyl acrylate, lauryl acrylate, stearyl acrylate, 2-ethylhexyl acrylate, 2-hydroxyethyl acrylate, -Hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, 2-
Hydroxybutyl acrylate, 2-hydroxybutyl methacrylate, tetrahydrofurfuryl acrylate,
Tetrahydrofurfuryl methacrylate, caprolactone-modified tetrahydrofurfuryl acrylate, cyclohexyl acrylate, cyclohexyl methacrylate,
Dicyclohexyl acrylate, isobornyl acrylate, isobornyl methacrylate, benzyl acrylate, benzyl methacrylate, ethoxydiethylene glycol acrylate, methoxytriethylene glycol acrylate, methoxypropylene glycol acrylate, phenoxy polyethylene glycol acrylate, phenoxy polypropylene glycol acrylate, ethylene oxide modified phenoxy acrylate, N ,
N-dimethylaminoethyl acrylate, N, N-dimethylaminoethyl methacrylate, 2-ethylhexyl carbitol acrylate, ω-carboxypolycaprolactone monoacrylate, phthalic acid monohydroxyethyl acrylate, acrylic acid dimer, 2-hydroxy-3-
Phenoxypropyl acrylate, 9,10-epoxidized oleyl acrylate, ethylene glycol monoacrylate maleate, dicyclopentenyloxyethylene acrylate, acrylate of caprolactone adduct of 4,4-dimethyl-1,3-dioxolane, 3-methyl -5,5-dimethyl-
1,3-dioxolane caprolactone adduct acrylate, polybutadiene acrylate, ethylene oxide-modified phenoxylated phosphoric acid acrylate, ethanediol diacrylate, ethanediol dimethacrylate, 1,3-
Propanediol diacrylate, 1,3-propanediol dimethacrylate, 1,4-butanediol diacrylate, 1,4-butanediol dimethacrylate, 1,6-hexanediol diacrylate, 1,6-hexanediol dimethacrylate, 1,9-nonanediol diacrylate, 1,
9-nonanediol dimethacrylate, diethylene glycol diacrylate, polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, polypropylene glycol diacrylate, polypropylene glycol dimethacrylate, neopentyl glycol diacrylate, 2-butyl-2-ethylpropanediol diacrylate, ethylene oxide Modified bisphenol A diacrylate, polyethylene oxide modified bisphenol A diacrylate, polyethylene oxide modified hydrogenated bisphenol A diacrylate, propylene oxide modified bisphenol A diacrylate, polypropylene oxide modified bisphenol A diacrylate, ethylene oxide modified isocyanuric acid diacrylate, pentaerythritol dia Chestnut Over Tomono stearate,
1,6-hexanediol diglycidyl ether acrylic acid adduct, polyoxyethylene epichlorohydrin-modified bisphenol A diacrylate, trimethylolpropane triacrylate, ethylene oxide-modified trimethylolpropane triacrylate, polyethylene oxide-modified trimethylolpropane triacrylate, Propylene oxide-modified trimethylolpropane triacrylate, polypropylene oxide-modified trimethylolpropane triacrylate, pentaerythritol triacrylate, ethylene oxide-modified isocyanuric acid triacrylate, ethylene oxide-modified glycerol triacrylate, polyethylene oxide-modified glycerol triacrylate, propylene oxide-modified glycerol triacrylate, Polypropylene oxide-modified glycerol triacrylate, pentaerythritol tetraacrylate, ditrimethylolpropane tetraacrylate, dipentaerythritol tetraacrylate,
Examples thereof include, but are not limited to, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, caprolactone-modified dipentaerythritol hexaacrylate, and polycaprolactone-modified dipentaerythritol hexaacrylate.

In the present invention, as a part or all of the general active energy ray-curable unsaturated organic compound, an active compound having a (meth) acryloyl group at a molecular chain terminal and having a molecular weight of about 400 to 5,000 is used. Energy ray curable resins can be used. The active energy ray-curable resin is not particularly limited as long as it has a (meth) acryloyl group at a molecular chain terminal and has a molecular weight of about 400 to 5,000. For example, polyurethane-modified polyether poly ( Polyurethane poly (meth) acrylate resins such as (meth) acrylate and polyurethane-modified polyester poly (meth) acrylate are preferred. Further, if the active energy ray-curable resin is specifically described, PEG1000, PEG2000, PPG400, PPG700, PPG10
00, PPG2000, PPG3000, PTMG650, PTMG1000, PTMG200
0, PPG700-MD, PPG1000-MD, PPG2000-MD, PGAA1000, PG
AA2000, BGAA1000, BGAA2000, HGAA1000, HGAA2000, MP
AA1000, MPAA2000, NPAA2000, OA130B (all made by Arakawa Chemical) and CJ8-1, CJ11-3, CJ11-4, K-7553 (all,
Active energy ray-curable resin having a (meth) acryloyl group at a molecular chain terminal used in the present invention is not limited thereto.

The active energy rays used in the present invention include ionizing radiation such as electron beams, ultraviolet rays, and γ rays. Of these, electron beams and ultraviolet rays are preferred. When electron beam irradiation is used, the acceleration voltage is 100 to 1000 KV, and more preferably 100 to 1000 KV, in terms of transmission power and curing power.
It is preferable to use an electron beam accelerator of up to 300 KV so that the absorbed dose in one pass is 0.5 to 20 Mrad. If the accelerating voltage or the amount of electron beam irradiation is lower than this range, the penetrating power of the electron beam is too low to sufficiently cure the inside of the support, and if it is higher than this range, not only does energy efficiency deteriorate. In addition, undesirable effects on quality such as a decrease in the strength of the support and decomposition of the resin and additives appear. As the electron beam accelerator, for example, any of an electro curtain system, a scanning type, a double scanning type, etc. may be used, but it is preferable to use a curtain beam type electron beam accelerator which is relatively inexpensive and can obtain a large output. In this curtain beam method, it is preferable that the accelerating voltage is 100 to 300 KV and the absorbed dose is 0.5 to 10 Mrad.

In electron beam irradiation, if the oxygen concentration is high, the curing of the electron beam curable resin is hindered.
Irradiation is preferably performed in an atmosphere in which replacement with an inert gas such as helium or carbon dioxide is performed and the oxygen concentration is controlled to 600 ppm or less, preferably 500 ppm or less.

In the case of ultraviolet irradiation, it is preferable to use a lamp of 80 W / cm or more. For example, there are a low-pressure mercury lamp, a medium-pressure mercury lamp, a high-pressure mercury lamp, a metal halide lamp, and the like, and an ozone-less type that generates less ozone. In addition, a photoreaction initiator can be mixed with the resin. Photoinitiators include acetophenones such as di and trichloroacetophenone, benzophenone,
Michler's ketone, benzyl, benzoin, benzoin alkyl ether, benzyl dimethyl ketal, tetramethylthiuram monosulfide, thioxanthones,
There are azo compounds and the like.

More specifically, the general photoreaction initiators described above include 2,2-dimethoxy-1,2-diphenylethan-1-one (Irgacure 651 Ciba-Geigy),
Hydroxy-cyclohexyl-phenyl-ketone (Irgacure 184, Ciba-Geigy), A: eutectic mixture of 1-hydroxy-cyclohexyl-phenyl-ketone and B: benzophenone (Irgacure 500, Ciba-Geigy), 2-methyl-1- [4- ( Methylthio) phenyl] -2-monforinopropanone-1 (Irgacure 907 Ciba-Geigy), 2
-Benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone-1 (Irgacure 369 Ciba-Geigy), 2-hydroxy-2-methyl-1-phenyl-propane-1-
ON (Darocure 1173 Ciba-Geigy), A: 2-hydroxy-2-methyl-1-phenyl-propan-1-one and B: 2,
Eutectic mixture of 4,6-trimethylbenzoyldiphenyl-phosphine oxide (Darocur 4265 Ciba-Geigy), 1- [4- (2-hydroxyethoxy) -phenyl] -2-
Hydroxydi-2-methyl-1-propan-1-one (Irgacure 2959 Ciba-Geigy), bis (cyclopentadienyl) -bis (2,6-difluoro-3- (pyr-1-yl) titanium (CGI- 784 Ciba-Geigy), A: 2-hydroxy-2-methyl-1-phenyl-propan-1-one and B: bisacylphosphine oxide (Irgacure 1700, Ciba-Geigy), but are not limited thereto. Not something.

The thickness of the image receiving layer made of the active energy ray-curable material varies depending on the type and smoothness of the support, but is preferably 1 to 100 μm, more preferably 2 to 50 μm. When the thickness is less than 2 μm, the sublimation dye acceptability,
Insufficient whiteness and opacity are obtained, and it is difficult to apply uniformly, resulting in uneven density due to unevenness on the surface of the support. become worse. On the other hand, if the thickness exceeds 50 μm, it is difficult to provide a smooth and uniform coating layer, which is not preferable in terms of quality.

The image-receiving sheet of the present invention originally has difficulty in fusing the image-receiving layer and the ink sheet during printing and has excellent blocking resistance. However, in order to further improve the blocking resistance, a silicone compound or the like is contained in the image-receiving layer. It is possible to incorporate a silicone compound that cures when irradiated with an electron beam or ultraviolet light. When blended, the blending amount is suitably 0.2 to 5 parts by weight based on 100 parts by weight of the active energy ray-curable resin.

In the active energy ray-curable resin composition of the present invention, an antioxidant, an ultraviolet absorber, a dispersant,
Various additives such as stabilizers, pigments, and lubricants can be added in appropriate combinations.Furthermore, white pigments are used for the purpose of improving whiteness and opacity, and fluorescent dyes and colored dyes are used for the purpose of adjusting the color tone of the image receiving layer. Dyes can be added as needed.

A layer containing an antistatic agent may be provided on at least one surface of the image receiving sheet in order to prevent static electricity from being generated during traveling of the image receiving sheet in the printer and causing running trouble. As the antistatic agent, a cationic hydrophilic high molecular compound can be used.

In the present invention, the surface of the support may be subjected to a surface treatment such as corona treatment or pre-coating in order to improve the adhesion and wettability between the support and the image receiving layer.

On the back surface of the image receiving sheet for thermal transfer recording of the present invention, a resin is applied by a method of applying a polyolefin resin by a melt extrusion method, or by applying an active energy ray-curable composition and then irradiating with an active energy ray. A back coat layer can be provided for forming a coating layer or for preventing curling, preventing static charge, and imparting writability. The back coat layer may contain an antistatic agent, a hydrophilic binder, a latex, a curing agent, a pigment, a surfactant and the like in appropriate combination.

The support used in the present invention includes ordinary natural pulp paper, coated paper, laminated paper, glass paper, plastic film, synthetic fiber, synthetic resin film or synthetic resin film, which is so-called synthetic paper. , A nonwoven fabric, or the like. For plastic films and synthetic paper, pigments such as clay, talc, kaolin, calcium carbonate, titanium dioxide, magnesium hydroxide, metal soaps such as zinc stearate, dispersants such as various surfactants, and colored pigments One or more types may be included. The thickness of the support is not particularly limited, but is preferably smooth and the basis weight is preferably 30 to 300 g / m ² .

In the present invention, a precoat layer may be provided between the image receiving layer and the support for the purpose of averaging unevenness of the support and improving whiteness and opacity. Examples of the material constituting such a precoat layer include inorganic coat layers such as clay, talc, kaolin, and ansilex, polyethylene (high-density polyethylene, low-density polyethylene, and medium-density polyethylene), polypropylene, polybutene, polypentene, and polyethylene terephthalate. Organic materials such as a homopolymer of a thermoplastic resin or a copolymer of two or more olefins such as an ethylene / propylene copolymer can be used, and these resins can be used alone or in combination. . Further, hollow particles may be contained for the purpose of improving the adhesion to the ink donor sheet and the heat insulating property of the image receiving layer.

As a method for preparing the active energy ray-curable composition, a general pigment kneader can be used. For example, a two-roll, three-roll, cowles resolver, homomixer, sand grinder, planetary mixer, ball mill, kneader, high-speed mixer, homogenizer, and the like. Further, an ultrasonic disperser or the like can be used.

The image-receiving sheet of the present invention is obtained by irradiating the coating layer comprising the active energy ray-curable composition with an electron beam or an ultraviolet ray, so that the surface smoothness and glossiness are high, but the surface smoothness and gloss are further improved. In order to increase the glossiness, it is preferable to manufacture an image receiving layer made of an active energy ray-curable resin by a cast EB method. (Hereinafter, a cured product layer obtained by irradiating an active energy ray-curable composition with an active energy ray to be cured is referred to as a “cured resin layer”.) The following method is one example of the cast EB method. That is, on one surface of a sheet-like support, an active energy ray-curable composition is applied to form a coating liquid layer, and this coating liquid layer is superimposed on the surface of a molding substrate, and the resulting multilayer body is formed. By applying electron beam irradiation, the coating liquid layer is cured, and at the same time, the sheet-like support and the cured resin layer are joined,
This is a method of peeling the molded substrate from the surface of the cured resin layer. This method is called a direct coating method. Also cast EB
Other examples of the method include the following transfer coating method.
That is, an active energy ray-curable composition is applied on one surface of the molded substrate to form a coating liquid layer, and the surface of the sheet-like support is superimposed on the coating liquid layer, and the multilayer formed thereby is formed. This is a method in which the body is irradiated with an electron beam to cure the coating liquid layer, and at the same time, the sheet-like support and the cured resin layer are joined, and the molded substrate is peeled from the surface of the cured resin layer.

The shape of the molded substrate used in the above production method may be either a roll shape or a sheet shape. Also, various materials such as metal and plastic can be used. For example, a metal cylindrical rotating body made of stainless steel, copper, chromium, or the like can be used. In this case, a mirror-finished smooth peripheral surface is preferable. Further, in order to facilitate the separation between the receiving layer and the surface of the molded substrate, a release aid such as silicone oil or wax can be supplied to the surface of the metal cylindrical rotary member.

The sheet-like material for molding used as the molding substrate is not particularly limited as long as it is smooth and flexible.
Specifically, a plastic film such as polyester, a metal sheet, a resin-coated paper, a metal-deposited film, a metal-deposited paper, and the like are preferable.On the surface of the sheet-shaped material for molding, in order to facilitate peeling of the receiving layer, A release aid such as silicone or wax may be supplied. Further, the surface of the sheet-shaped material may be subjected to an appropriate treatment in advance, for example, a treatment such as a silicone treatment, to facilitate the peeling of the cured receiving layer. The sheet-like material used as a molding base may be processed into an endless belt shape. Although the sheet-like material used as the molding base can be used repeatedly, the number of times of repeated use is limited since repeated impacts of active energy rays degrade the sheet-like material.

As a method of applying the active energy ray-curable composition to the surface of a metal cylindrical rotating body, a sheet-like material, or a sheet-like support, which is a molding substrate, for example, blade coating is used. Method, air doctor coat method, blade coat method, squeeze coat method,
Air knife coating, roll coating, gravure coating, transfer coating, spray coating, comma coating, smoothing coating, microgravure coating, reverse roll coating, multi-roll coating, dip coating, kiss coating Method, gate roll coating method, extrusion coating method, curtain coating method, drop curtain coating method, slide coating method,
Methods such as a fountain coating method and a slit die coating method are used. In particular, when a metal cylindrical rotating body is used as a molding base, use a roll coating method using an application rubber roll or an offset gravure coating method in order not to damage the surface of the metal cylindrical rotating body. Preferably, a non-contact fountain coater, a slit die coater or the like is advantageously used. Further, a method other than the cast EB method, for example, a method of applying an active energy ray-curable composition to a support, curing the composition with active energy rays, and then calendering the composition is also possible.

[0032]

EXAMPLES The present invention will be described below in detail with reference to examples, but the contents of the present invention are not limited to the examples. Parts in Examples are parts by weight unless otherwise specified.

<Example 1> An acrylic monomer having the structure of the general formula 1 on a 150 μm-thick synthetic paper (trade name: YUPO FPG-150, manufactured by Oji Yuka Synthetic Paper Co., Ltd.) which has been subjected to corona treatment in advance. Dicyclopentanyl acrylate (FA-513
A, using a Mayer bar, 70 parts of 70 parts of a urethane-modified acrylate oligomer of polyneopentyl glycol adipate (molecular weight: 1000) (OA130B manufactured by Arakawa Chemical Co., Ltd.) using a Mayer bar to obtain 8.0 g of an applied amount. / M ²
After applying a 75 μm-thick polyester film used as a molding substrate on top of it and compressing it, an electron beam was applied to the multilayer body from the back of the polyester film at an accelerating voltage of 175 KV, an absorbed dose of 3 Mrad,
The coating liquid layer was cured by irradiation under the condition of an oxygen concentration of 500 ppm or less, and at the same time, the obtained electron beam-curable resin layer and the sheet-like support were integrally bonded. Thereafter, the polyester film was peeled from the electron beam-curable resin layer to obtain an image receiving sheet for thermal transfer recording having the electron beam-curable resin layer.

<Example 2> In Example 1, instead of 30 parts of a urethane-modified acrylate oligomer of polyneopentyl glycol adipate (molecular weight: 1000) (OA130B manufactured by Arakawa Chemical Co., Ltd.), a urethane-modified acrylate oligomer of polypropylene glycol (molecular weight: 700) was used. PPG7
An image-receiving sheet for thermal transfer recording was prepared in the same manner as in Example 1 except that 30 parts of (00 Arakawa Chemical Co., Ltd.) was used.

Example 3 In Example 1, dicyclopentanyl acrylate (FA-513A, manufactured by Hitachi Chemical Co., Ltd.)
Dicyclopentanyl methacrylate (FA
-513M, manufactured by Hitachi Chemical Co., Ltd.) and 70 parts of a urethane-modified acrylate oligomer of polyneopentyl glycol adipate (molecular weight: 1000) (OA130B manufactured by Arakawa Chemical Co.) was replaced by 30 parts of ethylene oxide-modified bisphenol A diacrylate (M210 Toa Gosei) (Manufactured by K.K.), and an image receiving sheet for thermal transfer recording was produced in the same manner as in Example 1 except that the absorbed dose was changed from 3 Mrad to 10 Mrad.

Example 4 Example 3 was repeated except that in place of 30 parts of ethylene oxide-modified bisphenol A diacrylate (M210 manufactured by Toagosei Co., Ltd.), 40 parts of trimethylolpropane triacrylate (M309 manufactured by Toagosei Co., Ltd.) were used. An image receiving sheet for thermal transfer recording was produced in the same manner as in Example 3.

Example 5 Art paper having a basis weight of 79 g / m ²
(Trademark: Ultra Kinto, manufactured by Oji Paper Co., Ltd.) is bonded to the opposite side of the coating surface, and a corona treatment is applied to a 150 μm-thick polyethylene terephthalate film (trademark: Lumirror T-150, manufactured by Toray Industries) in advance. 70 parts of dicyclopentanyl acrylate (FA-513A, manufactured by Hitachi Chemical Co., Ltd.) which is an acrylic monomer having the structure of general formula 1, and urethane-modified acrylate oligomer of polyneopentyl glycol adipate (molecular weight: 1000) (OA130B manufactured by Arakawa Chemical Co., Ltd.) 30) using a Meyer bar to apply 30 g of the applied amount after curing to 8.0 g / m ² , and superimposing a 75 μm-thick polyester film used as a molding base thereon, followed by pressure bonding; An electron beam was applied to this multilayer body from the back of the polyester film at an acceleration voltage of 175 KV, an absorbed dose of 3 Mrad, and an oxygen concentration of 500 pp. Following irradiation under conditions to cure the coating liquid layer, therewith were bonded together and the resulting electron beam curing resin layer and the sheet-like support at the same time. Thereafter, the polyester film was peeled from the electron beam-curable resin layer to obtain an image receiving sheet for thermal transfer recording having the electron beam-curable resin layer.

<Example 6> An acrylic monomer having a structure of the general formula 1 on a cast-coated paper (trade name: mirror coated gold, manufactured by Oji Paper Co., Ltd.) having a basis weight of 128 g / m ² which has been subjected to corona treatment in advance. 10 parts of dicyclopentanyl acrylate (FA-513A, manufactured by Hitachi Chemical Co., Ltd.), 90 parts of tripropylene glycol diacrylate (M220 manufactured by Toagosei Co., Ltd.), 2,2-dimethoxy-1,2 as a photopolymerization initiator
2 parts of -diphenylethan-1-one (Irgacure 651 Ciba-Geigy) was applied using a Meyer bar so that the applied amount after curing became 8.0 g / m ² , and ultraviolet irradiation (80 W / cm, irradiation) At a distance of 10 cm) to obtain an image receiving sheet for thermal transfer recording.

Comparative Example 1 The amounts of the dicyclopentanyl acrylate and the urethane-modified acrylate oligomer of polyneopentyl glycol adipate (molecular weight: 1000) (OA130B manufactured by Arakawa Chemical Co.) in Example 1 were 3 parts and 97 parts, respectively. A heat transfer recording image-receiving sheet was obtained in the same manner as in Example 1 except that this was changed to.

Comparative Example 2 The amounts of the dicyclopentanyl acrylate and the urethane-modified acrylate oligomer of polyneopentyl glycol adipate (molecular weight: 1000) (OA130B manufactured by Arakawa Chemical Co.) in Example 1 were 85 parts and 15 parts, respectively. A heat transfer recording image-receiving sheet was obtained in the same manner as in Example 1 except that this was changed to.

<Comparative Example 3> Instead of the resin represented by the general formula 1, 2-ethylhexyl carbitol acrylate (M120), which is a monoacrylate having no structure represented by the general formula 1, is used.
An image receiving sheet for thermal transfer recording was obtained in the same manner as in Example 1, except that Toa Gosei Co., Ltd. was used.

Comparative Example 4 The procedure of Example 1 was repeated, except that the dicyclopentanyl acrylate resin in Example 1 was replaced with isobornyl acrylate (IB-XA, manufactured by Kyoeisha Yushi Kagaku KK). An image receiving sheet for thermal transfer recording was obtained.

An ink donor sheet was overlaid on the thus-obtained thermal transfer recording image-receiving sheet, and heated at 180 ° C. for 2 seconds from the back side of the ink donor sheet, and the obtained transfer density and blocking property were evaluated. The transfer density is a value obtained by measuring the transfer density of cyan with a Macbeth densitometer. Regarding blocking, a state where no blocking is visually observed is indicated by ○, a state where blocking is slightly observed is indicated by △,
The state in which blocking was severe was evaluated as x, and the results are shown in Table 1.

[0044]

[Table 1]

In Examples 1 to 6 using the compound represented by the general formula 1, good results were obtained in terms of transfer density and blocking resistance. On the other hand, since the transfer density was low in Comparative Example 1 and blocking occurred in Comparative Example 2, it was determined that the amount of the active energy ray-curable organic compound having the structure of General Formula 1 was not appropriate. Comparative Example 3 using 2-ethylhexyl carbitol acrylate instead of dicyclopentanyl acrylate had a low transfer density.
In Comparative Example 4 using isobornyl acrylate instead of dicyclopentanyl acrylate, the blocking resistance and the transfer density were not sufficient.

[0046]

As is evident from the results in Table 1, by providing an image receiving layer comprising an active energy ray-cured material containing a compound represented by the general formula 1 on a support, the dye receptivity of a sublimable dye was improved. Thus, an image receiving sheet for thermal transfer recording having strong gloss and excellent blocking resistance was obtained.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshiyuki Takahashi 1-10-6 Shinonome, Koto-ku, Tokyo Inside Oji Paper Co., Ltd. Shinonome Research Center

Claims (1)

[Claims] 1. A coating layer comprising an active energy ray-curable composition containing 5 to 80% by weight of an active energy ray-curable organic compound having the structure of the following formula (1) is provided on at least one surface of a support. An image receiving sheet for thermal transfer recording, wherein the coating layer is cured by an active energy ray. Embedded image In Chemical Formula 1 (General Formula 1), R represents hydrogen or a methyl group.