JP3171500B2 - Sublimation type thermal transfer image receiving medium - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sublimation type thermal transfer image receiving medium used in combination with a thermal transfer recording medium having a transfer layer containing a thermal sublimation dye.

[0002]

2. Description of the Related Art Conventionally, as an image receiving medium used for sublimation type thermal transfer, papers such as synthetic paper, high quality paper, art paper and the like, and further, a substrate such as a polyester film, are strongly dyed to a heat sublimable dye. A laminate having a dye receiving layer mainly composed of a thermoplastic polyester resin or the like exhibiting adhesiveness provided by means such as coating is used. For example, paper sheets such as high-quality paper, art paper, coated paper, synthetic resin or emulsion impregnated paper, synthetic resins such as polyolefin, PET, polystyrene, etc. Are known in which a dye-receiving layer formed from is laminated. On the other hand, when the substrate of the image receiving medium is not a paper sheet such as a resin sheet, there is a drawback that the handleability is poor because the feel is not paper-like, and the production cost is high. However, the use of such a material has a defect that voids and unevenness are generated on the surface due to the fibrous property, and the sublimed dye is not transferred well to the receptor layer, resulting in so-called white spots.

[0003] In order to solve such defects such as the occurrence of white spots due to poor adhesion, an elastic layer is provided between the dye receiving layer and the substrate (JP-A-61-258793).
And Japanese Patent Application Laid-Open No. Sho 61-144394, and the provision of a layer mainly composed of hollow particles and an organic solvent resistant polymer (Japanese Patent Application Laid-Open No. 64-27996).

[0004]

However, in the method of providing an intermediate layer as described above, it is necessary to provide a thick intermediate layer in order to give the intermediate layer a cushioning function. . For this reason, if the intermediate layer material is dissolved or made into an emulsion in an organic solvent or water and coated to form an intermediate layer, it takes time to dry,
Further, there is a disadvantage that the paper obtained by extrusion coating becomes expensive. In order to obtain an inexpensive substrate, it is conceivable to impregnate papers such as low-density Japanese paper and filter paper with hollow particles by means of a size press. Due to the thermal characteristics, the image quality is easily deteriorated such as the gloss of the image is reduced due to the heating by the thermal head.

Accordingly, it is an object of the present invention to provide an inexpensive image receiving medium having a uniform image quality, a high image density, a very small reduction in gloss of a high-density image, and a low cost.

[0006]

According to the present invention, there is provided an image receiving medium used in combination with a sublimation type thermal transfer recording medium having a transfer layer containing a thermal sublimable dye, comprising a substrate and an upper surface of the substrate. Wherein the substrate comprises a sheet of fibrous material, and polymer particles are embedded in the voids of the fibrous material, and the dye-receiving layer is thermoset. The present invention provides a sublimation type image transfer medium for thermal transfer, characterized by containing at least one of a hydrophilic resin and an ionizing radiation-curable resin.

Further, according to the present invention, there is provided an image receiving medium used in combination with a sublimation type thermal transfer recording medium having a transfer layer containing a thermal sublimable dye, wherein polymer particles are contained in voids of a fibrous substance. Sublimation type thermal transfer image receiving apparatus, wherein an intermediate layer made of a thermosetting resin or an ionizing radiation curable resin and a dye receiving layer are laminated in this order on a substrate made of a sheet of a fibrous substance in which is embedded. A medium is provided.

Further, according to the present invention, there is provided an image receiving medium used in combination with a sublimation type thermal transfer recording medium having a transfer layer containing a thermal sublimable dye, the substrate being provided on the upper surface of the substrate. And a dye receiving layer, wherein the substrate is a sheet of a fibrous substance, and polymer particles and at least one of a thermosetting resin and an ionizing radiation-curable resin are present in voids of the fibrous substance. An image receiving medium for sublimation type thermal transfer characterized by being embedded is provided.

That is, the image-receiving medium for sublimation-type thermal transfer of the present invention comprises a substrate comprising a sheet of fibrous substance in which polymer particles are embedded in voids of the fibrous substance, and a dye-receiving substrate provided on the upper surface of the substrate. And a curable resin selected from a thermosetting resin and an ionizing radiation curable resin contained in the dye receiving layer, or an intermediate layer made of the same curable resin is provided between the support and the dye receiving layer. Or embedding the curable resin in the voids of the fibrous material together with the polymer particles, thereby overcoming the drawbacks of the conventional image receiving medium. Done,
In other words, a high-density image with uniform image quality can be obtained, and the cost is low. In addition, the use of the curable resin does not significantly reduce the gloss of the high-density portion of the image, even though the substrate is relatively weak to heat.

In the image receiving medium of the present invention, a sheet of a fibrous substance which is a main component of the substrate can be produced by forming the fibrous substance into a sheet by a conventional method. Examples of the fibrous substance include natural plant fibers such as wood pulp and bark fiber, synthetic pulp, recycled pulp, synthetic resin fibers such as polyester, polyolefin, and polystyrene, and chemical fibers such as glass fibers. These fibers are desirably white or colorless, but may be colored. Among these fibrous substances, particularly preferable in the present invention are synthetic resin fibers such as PET and natural fibers such as hemp. These fibrous substances are
It can be obtained by processing the resin into a fibrous form by a conventional means such as melt spinning.

As the sheet of the fibrous substance used in the present invention, a conventionally known sheet is used, and generally, a porosity:
Those having 20 to 90 vol% are used. Further, its thickness is 5 to 500 μm. Specific examples of such a sheet of fibrous material include Japanese paper, papermaking paper such as Western paper,
Examples thereof include synthetic paper and nonwoven fabric whose surface is formed as paper dust.

The substrate used in the present invention can be obtained by embedding polymer particles in the sheet of the fibrous substance. In this case, the polymer particles may be solid, but are preferably hollow. Further, it may be porous. It is preferable that the polymer particles contain a low-boiling substance therein and have a heat-expanding property. Such heat-expandable polymer particles are buried in the inter-fiber voids of the sheet of fibrous material, and then heat-expanded to completely fill the inter-fiber voids and have good bonding with the voids. It can be buried and held in the part.

The polymer particles used in the present invention are conventionally known, and specific examples thereof include the following. (1) Thermo-expandable thermoplastic resin particles: vinylidene chloride /
Hollow particles having a capsule wall made of a thermoplastic resin such as an acrylonitrile copolymer and containing a volatile liquid expanding agent such as propane, n-butane, or isobutane inside the particles. When heated, the liquid inside the particles expands to form expanded polymer particles. Such particles are commercially available, for example, Matsumoto Microsphere F30 manufactured by Matsumoto Yushi Co., Ltd. and Expanse 1 manufactured by Chemo Nobel.
551 and 642. (2) Microcapsule-shaped polymer particles: These are polymer particles in which a hard resin such as an acryl / styrene copolymer is used as a capsule wall, water is contained therein, and water jumps out during drying and becomes hollow. Particles of this type are also commercially available, for example Rohm and Haas Robake OP-84.
J and the like.

The size of the polymer particles used in the present invention is such that when the polymer particles are embedded in the fiber voids of the sheet of the fibrous substance,
It is better to be smaller than the size of the pores formed by the fiber voids. Generally, 1/100 to 1/2 of the pore size,
Preferably it is about 1/50 to 1/5. In order to embed the polymer particles in the sheet of the fibrous substance, the adhesive containing the polymer particles may be impregnated into the sheet, and then dried by heating.The content ratio of the polymer particles in the liquid adhesive is as follows. , 1
It is 70% by weight, preferably 10 to 50% by weight. A conventionally known liquid adhesive is used.

In this case, carboxymethylcellulose, sodium alginate, starch, casein, polyvinyl alcohol, polyethylene oxide,
Examples include polyvinylpyrrolidone, acrylate, methacrylate, ethylene / vinyl acetate copolymer, polyurethane, epoxy resin, and various rubbers. The ratio of the adhesive component to the polymer particles is 0.01 to 10 parts by weight, preferably 0.05 to 5 parts by weight, more preferably 0.05 to 5 parts by weight, based on 1 part by weight of the polymer particles. 0.5
Parts by weight. The liquid adhesive can be an aqueous solution, an organic solvent solution or an emulsion. As a method for impregnating the sheet of the fibrous substance with the liquid adhesive containing the polymer particles, a conventionally known method, for example, a size press, a dipping method, a roll coating method and the like can be mentioned.

In the liquid adhesive containing polymer particles, it is preferable to use an organic solvent-resistant adhesive as the adhesive component. When an organic solvent-resistant adhesive component is used, the adhesive component adheres to the surface of the polymer particles to form a protective layer made of the organic solvent. Then, when a substrate containing such polymer particles is coated with an organic solvent solution of a resin to form a dye receiving layer, the polymer particles contained in the substrate are dissolved by contact with the organic solvent. Is prevented.

The substrate used in the present invention is provided with an organic solvent-resistant polymer layer on the surface thereof, thereby preventing the polymer particles from being dissolved by contact with an organic solvent. When such a polymer layer is provided, it is not necessary to use an organic solvent-resistant adhesive component as the adhesive component.

The organic solvent-resistant adhesive component or polymer may be any as long as it is excellent in film-forming performance and suppresses the penetration of the organic solvent.
Examples thereof include aqueous polymers such as polyvinyl alcohol, casein and starch, acrylic acid esters, ethylene / vinyl acetate copolymer, and polyethylene having a carboxyl group. Among them, polyvinyl alcohol, casein, and starch are preferably used because of their excellent organic solvent resistance.

The present invention is characterized in that at least one type of curable resin selected from a thermosetting resin and an ionizing radiation curable resin is used. Because of the original structure, it has excellent heat resistance and hardness. By using such a resin in any one or more of the dye receiving layer, the intermediate layer between the dye receiving layer and the substrate, or the voids of the fibers of the substrate, the resin is heated to a high temperature from the thermal head during image formation. However, a high-quality image can be obtained without extremely lowering the gloss of the image.

Among the curable resins used in the present invention, the thermosetting resins include phenol resins, urea resins, melamine resins, furan resins, silicone resins, epoxy resins,
Unsaturated polyester resin, allyl resin, epoxy resin,
There are polyurethane, diallyl phthalate resin and the like, and the ionizing radiation-curable resin is not particularly limited as long as it has a functional group which can be cured by ionizing radiation in the molecule. In addition, an ionizing radiation-curable monomer may be mixed for the purpose of controlling the cured density.

Examples of ionizing radiation for curing the ionizing radiation-curable resin include ultraviolet light, α-rays, β-rays, and γ-rays.
Ray, x-ray, electron beam, etc., but α-ray, β-ray, γ
X-rays and x-rays are associated with problems such as danger to the human body. Therefore, ultraviolet rays and electron beams, which are easy to handle and are widely used industrially, are preferably used. The electron beam irradiation method is more preferable because it has higher productivity than the ultraviolet irradiation method, has no odor and coloring problems due to the addition of a sensitizer, and has an advantage of easily obtaining a uniform crosslinked structure.

When an electron beam is used, it is desirable that the amount of the irradiated electron beam is adjusted within a range of about 0.1 to 20 Mrad. If it is less than 0.1 Mrad, a sufficient irradiation effect cannot be obtained, and irradiation exceeding 20 Mrad is not preferable because there is a risk of deteriorating the base material, especially paper or certain plastic films. As an electron beam irradiation method, for example, a scanning method, a curtain beam method, a broad beam method, or the like is employed, and an acceleration voltage of about 100 to 300 KV when irradiating an electron beam is appropriate.

When ultraviolet rays are used, it is necessary to incorporate a sensitizer into the resin composition. For example, thioxanthone, benzoin, benzoin alkyl ether xanthone, dimethylsanton, benzophenone, anthracene, 2,2- Diethoxyacetophenone, benzyldimethylketal, benzyl, diphenyldisulfide, anthraquinone, 1-chloroanthraquinone, 2-
One or more sensitizers such as ethylanthraquinone, 2-ter-butylanthraquinone, N, N'-tetraethyl-4,4'-diaminobenzophenone and 1,1-dichloroacetophenone are appropriately blended.

It is desirable that the amount of the sensitizer be adjusted within the range of 0.2 to 10% by weight, preferably 0.5 to 5% by weight, based on the solid content of the composition. Further, in addition to such a sensitizer, in order to accelerate curing, for example, triethanolamine, 2-dimethylaminoethanol, dimethylaminobenzoic acid, isoamyl dimethylaminobenzoate, dioctylaminobenzoic acid, lauryl dimethylaminobenzoate Such tertiary amines may be added in an amount of about 0.05 to 3% by weight based on the solid content of the composition.

As the light source for ultraviolet irradiation, 1 to 50 ultraviolet lamps (for example, low-pressure, medium-pressure, high-pressure mercury lamps having an operating pressure of several mmHg to about 10 atm), xenon lamps, tungsten lamps and the like are used. 50
Ultraviolet light having an intensity of about 00 to 8000 μw / cm is preferably irradiated.

In the present invention, a dye receiving layer, an intermediate layer,
Alternatively, various auxiliaries such as a dye, a pigment, a wetting agent, an antifoaming agent, a dispersant, and an antistatic agent can be appropriately added to the voids of the fibers of the substrate, if necessary.

In the present invention, the resin used in the dye-receiving layer must have a dyeable segment. Examples of the dyeable segment include an ester bond, a urethane bond, an amide bond, and a urea bond. And those containing a highly polar bond (polycaprolactone, polystyrene, polyvinyl chloride, polyacrylonitrile, etc.). Particularly preferably, a cured product of a vinyl chloride resin containing an OH group and an isocyanate compound is used as a main component, so that the vinyl chloride resin has excellent properties in dyeing properties, peelability, light resistance, and storage stability. And O
By curing reaction with H group and isocyanate compound,
An image receiving medium is obtained in which the gloss of the printed surface is less reduced by heating from the thermal head during image formation.

As the vinyl chloride resin containing an OH group used in the dye receiving layer, commercially available products include, for example, VAGH and VROH manufactured by Union Carbide, and Denka Vinyl 1000GKT, 100 manufactured by Denki Kagaku Kogyo.
0 GK, 1000 GKS and the like. Further, as the isocyanate compound, tolylene diisocyanate,
Hexamethylene diisocyanate, 4,4-diphenylmethane diisocyanate, various isocyanate compounds such as triphenylmethane triisocyanate are used,
Additives of these and hexanetriol can also be used. In addition, the usage ratio of the vinyl chloride resin containing an OH group and the isocyanate compound is preferably in a range of 0.2 to 2.0 in a molar ratio of NCO / OH.

In addition to the above-mentioned vinyl chloride-based thermosetting resin and the like, the dye-receiving layer may be a conventionally known dyeing resin such as a polyester resin, a polycarbonate resin, a styrene resin, a vinyl chloride-based resin, and a silicone resin. Etc. can be contained. Among these, a vinyl chloride resin is particularly preferably used, and commercially available products thereof include, for example, VYHH, VYNS, VYHD, manufactured by Union Carbide Co., Ltd.
VYLF, Denka Vinyl 100 manufactured by Denki Kagaku Kogyo Co., Ltd.
0MT, 1000A, 1000L, 1000D, MHE
100, ME120 and the like. The amount of these resins used is 0 to 1 with respect to the vinyl chloride resin containing an OH group.
A range of 0 times is preferable.

In the present invention, a release agent such as an amino-modified silicone, an epoxy-modified silicone or an alkyd-modified silicone can be contained in the dye receiving layer. By using these silicones, the effect of preventing thermal fusion with the transfer recording medium is improved. The addition amount is preferably 10% by weight or less based on the resin amount of the receiving layer.

Incidentally, a filler can be contained in the dye receiving layer. Examples of the filler include white pigments such as silica, titanium oxide, and calcium carbonate. The amount of the filler is preferably 5 to 60% by weight based on the amount of the resin in the receiving layer. In addition, the dye receiving layer may appropriately contain a surfactant, an ultraviolet absorber, an antioxidant, and the like.

In the image receiving medium of the present invention, even when the above-mentioned curable resin is contained in the substrate or the dye receiving layer, the curable resin is provided between the dye receiving layer and the substrate composed of the sheet of the fibrous substance and the polymer particles. An intermediate layer can be provided for the purpose of improving the barrier properties and smoothness at the time of forming the receiving layer and preventing white spot development at the time of dye transfer. Further, if necessary, on the opposite side of the receiving layer on the upper surface of the substrate, that is, on the lower surface of the substrate, for the purpose of preventing polymer particles from falling off, reducing the curl of the image receiving medium due to heat during thermal transfer recording, and providing paper feeding suitability The same or different resin layers as described above can be provided.

As the resin constituting the intermediate layer, it is particularly preferable to use a curable resin. Use of a water-soluble or water-dispersible resin is very preferable because the polymer particles in the substrate are not immersed in the solvent.

The resin used for the intermediate layer or the resin layer provided on the lower surface of the substrate may be, for example, polyvinyl alcohol, polyester, vinyl chloride / vinyl acetate copolymer, acrylic resin, Vinyl, ethylene / vinyl acetate copolymer, alkyl titanate resin, vinyl acetate / acrylic copolymer, polyethyleneimine, polyvinyl chloride, polybutadiene, polyethylene, ethylene / acrylic copolymer, polypropylene, ionomer resin, polystyrene, polyurethane elastomer, etc. Thermoplastic resin.

As a method for forming the intermediate layer or the resin layer on the upper or lower surface of the substrate, there are extrusion coating, hot melt coating and the like in addition to ordinary solution coating. Is also good. Further, after these resins are once formed into a film, the film may be formed by adhering the film to one or both surfaces of the substrate through heat bonding or an adhesive. Suitable resins for this type of resin layer formation are polyester resins such as polyethylene terephthalate,
It is an acrylic resin such as polyolefin, polyvinyl chloride, polystyrene, polycarbonate, and polymethyl methacrylate.

It is preferable to use a thermosetting resin or an ionizing radiation-curable resin as the adhesive component instead of or in combination with the above-mentioned polymer substance. It is preferable to use an organic solvent solution, aqueous solution or emulsion that does not dissolve the polymer particles.

The thickness of the dye receiving layer is 0.5 to 20 μm.
m is preferable, and particularly preferably 2 to 5 μm. When applying an intermediate layer or a resin layer, the thickness of the intermediate layer or the resin layer is preferably 0.1 to 300 μm, and particularly preferably 1 to 300 μm.
10 μm.

For the purpose of improving the appearance and smoothness of the dye-receiving layer, an intermediate layer is applied to the substrate and dried, or after the dye-receiving layer is provided on the substrate, the entire laminate is subjected to supercalendering or the like. The smoothing process can be performed by the pressing means.

Further, if necessary, the surface and / or the back of the obtained image receiving medium can be subjected to an antistatic treatment with a surfactant or the like, the suitability for paper feeding can be improved, and a pigment, It is also possible to impart a variety of media by applying a dye or the like, or to change the contrast of an image.

[0040]

Next, the present invention will be described in more detail with reference to examples. In addition, all the parts shown below are based on weight.

Example 1 Non-woven fabric made of polyester (weight: 50.8 g / m ² )
(Trade name: 05TH-48, manufactured by Hirose Paper Co., Ltd.) was impregnated with [Solution A] having the following composition so as to have a dry weight of 10 g / m ² . [Solution A] Hollow polymer particles (trade name: Matsumoto Microsphere 257 parts MF30-C, manufactured by Matsumoto Yushi Pharmaceutical Co., Ltd., average particle size: 15 μm) Polyvinyl alcohol (trade name: Kuraray Poval PVA117, 18 parts Kuraray Co., Ltd.) 5 parts Water 557 parts After drying, the whole is heated at 130 ° C. for 3 minutes to expand the hollow polymer particles, and then subjected to supercalendering. Was formed.

On the upper surface of the substrate thus obtained, [Solution B] having the following composition was applied to a thickness of 6 μm. [Liquid B] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer 12 parts (trade name: Denka Vinyl # 1000GKT, manufactured by Denki Kagaku) Isocyanate (trade name: Coronate L, Japan 6 parts, Polyurethane Industry Co., Ltd.) Silicone resin 5 parts (trade name: AY42-125, manufactured by Toray Dow Corning Silicone Co., Ltd.) Toluene 20 parts Methyl ethyl ketone 60 parts The coated laminate was dried and aged at 60 ° C. for 2 days to produce an image receiving medium.

On the other hand, as a transfer medium for the heat sublimation dye, a transfer layer coating agent having the following formulation was applied on a 6 μm thick PET film provided with a silicone cured resin film (about 1 μm thick) as a back layer. It was applied to a thickness of 2 μm to obtain a transfer medium. [Coating agent for transfer layer] Polyvinyl butyral resin (trade name: BX-1; manufactured by Sekisui Chemical Co., Ltd.) 10 parts Thermal sublimation disperse dye for cyan (trade name: Kayaset 714; manufactured by Nippon Kayaku Co., Ltd.) 6 parts Methyl ethyl ketone 45 parts Toluene 45 parts

The obtained transfer medium and image receiving medium are overlapped so that the transfer layer of the transfer medium and the dye receiving layer of the image receiving medium face each other. A recording was made. The recording density of the thermal head was 6 dots / mm, and the recording output was 0 to 3.55 mj / dot.

Example 2 A substrate was prepared in the same manner as in Example 1, and the following [Solution C] was applied thereon to a thickness of 2 μm and dried to form an intermediate layer. [Liquid C] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer 10 parts (trade name VAGH: manufactured by Union Carbide) Isocyanate (trade name Coronate L: manufactured by Nippon Polyurethane Industry) 5 parts Toluene 20 parts Methyl ethyl ketone 60 parts

Next, the following [solution D] was placed on the obtained intermediate layer.
Was applied to a thickness of 6 μm. [D Liquid] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: Denka Vinyl # 1000GKT, manufactured by Denki Kagaku Kogyo) 18 parts Silicone resin (trade name: AY42-125, manufactured by Toray Dow Corning Silicone Co., Ltd.) 5 parts Toluene 20 parts Methyl ethyl ketone 60 parts

The obtained laminate was dried and aged at 60 ° C. for 2 days to produce an image receiving medium. Image recording was performed in the same manner as in Example 1 using the obtained image receiving medium.

Example 3 Polyester non-woven fabric (weight: 50.8 g / m ² )
(Trade name: 05TJ-48, manufactured by Hirose Paper Co., Ltd.) was impregnated with [solution E] having the following composition so that the dry weight was 10 g / m ² . [Solution E] Ionizing radiation-curable urethane acrylate 80 parts (trade name: Art Resin UN-2500, manufactured by Negami Kogyo Co., Ltd.) Trioxyethyl acrylate 20 parts Polyoxyethylene nonylphenol aerial 4 parts Nonionic surfactant Hollow Polymer particles (trade name: Matsumoto Microsphere 300 parts MF30-C, manufactured by Matsumoto Yushi Seiyaku Co., Ltd.) Antistatic agent (trade name: Chemistat 6300, manufactured by Sanyo Chemical Co., Ltd.) 6 parts Polyvinyl alcohol (trade name: Kuraray Povar) PVA 117, 20 parts Kuraray Co., Ltd.) Water 500 parts

After drying, the whole was heated at 130 ° C. for 3 minutes to expand the hollow polymer particles, and then supercalendered. Next, using an electron beam irradiation apparatus (Electro Curtain CB-150, manufactured by ESI), 5
The substrate was obtained by irradiating an electron beam of Mrad.

The [D solution] of Example 2 was applied on the obtained substrate, dried and aged at 60 ° C. for 2 days to obtain an image receiving medium. Using this image receiving medium, image recording was performed in the same manner as in Example 1.

Comparative Example 1 On the substrate prepared in the same manner as in Example 1, [D solution] of Example 2 was applied to a thickness of 6 μm, dried and further aged to prepare an image receiving medium. Using the obtained image receiving medium,
Image recording was performed in the same manner as in Example 1.

Comparative Example 2 Coated paper (trade name: OK coated, manufactured by Oji Paper Co., Ltd., basis weight 1)
27 g / m ² ), the [D solution] of Example 2 was applied to a thickness of 6 μm, dried and further aged to prepare an image receiving medium. Image recording was performed in the same manner as in Example 1 using the obtained image receiving medium.

(Evaluation) With respect to Examples 1 to 3 and Comparative Examples 1 and 2, white spots (image quality unevenness) were visually evaluated.
The glossiness (60 °) of the portion where 3.55 mJ / dot was applied was measured. Table 1 shows the results.

[0054]

[Table 1]

From Table 1, it can be seen that according to the image receiving medium of the present invention, a high quality image without white spots can be obtained, and the gloss of the high density image does not decrease much.

[0056]

According to the first aspect of the present invention, there is provided an image receiving medium selected from a thermosetting resin and an ionizing radiation curable resin on a base made of a sheet of fibrous material in which polymer particles are embedded in voids of the fibrous material. According to the present image receiving medium, it is possible to obtain a high-density image with uniform image quality, and the gloss of the high-density image does not decrease so much because the dye receiving layer containing the curable resin is provided. An image is obtained. It is also cheap.

In the image receiving medium according to the present invention, an intermediate layer made of a curable resin selected from a thermosetting resin and an ionizing radiation curable resin is provided on the substrate, and a dye receiving layer is further laminated thereon. With this configuration, according to the present image receiving medium, the same effects as those of the image receiving medium of claim 1 can be obtained.

According to a third aspect of the present invention, there is provided the image receiving medium, wherein the substrate is formed of a sheet of a fibrous substance, and the voids of the fibrous substance are formed of polymer particles, a thermosetting resin and an ionizing radiation curable resin. According to the present image receiving medium, the curable resin protects the polymer particles that are vulnerable to heat and suppresses a decrease in glossiness. The effect of is obtained.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroki Kuboyama 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd. (72) Inventor Yutaka Aruga 1-3-6 Nakamagome, Ota-ku, Tokyo Ricoh Co., Ltd. (56) References JP-A-64-24794 (JP, A) JP-A-1-113289 (JP, A) JP-A-1-2444891 (JP, A) JP-A-2-89692 ( JP, A) JP-A-2-248289 (JP, A) JP-A-3-21487 (JP, A) JP-A-3-42283 (JP, A) JP-A-5-286260 (JP, A) JP Hei 6-106866 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B41M 5/38-5/40

Claims (3)

(57) [Claims] 1. An image receiving medium used in combination with a sublimation type thermal transfer recording medium having a transfer layer containing a thermal sublimable dye, comprising: a base; and a dye receiving layer provided on the upper surface of the base. Wherein the substrate is made of a sheet of a fibrous substance, and polymer particles are embedded in voids of the fibrous substance, and the dye-receiving layer contains at least a thermosetting resin and an ionizing radiation-curable resin. An image receiving medium for sublimation-type thermal transfer, comprising one type. 2. An image receiving medium used in combination with a sublimation type thermal transfer recording medium having a transfer layer containing a thermosublimable dye, wherein the fibrous material has polymer particles embedded in voids of a fibrous substance. An image receiving medium for sublimation type thermal transfer, characterized in that an intermediate layer made of a thermosetting resin or an ionizing radiation curable resin and a dye receiving layer are laminated in this order on a substrate made of a sheet of a substance. 3. An image receiving medium used in combination with a sublimation type thermal transfer recording medium having a transfer layer containing a thermosublimable dye, comprising a substrate and a dye receiving layer provided on the upper surface of the substrate. And that the substrate is made of a sheet of a fibrous substance, and that polymer particles and at least one of a thermosetting resin and an ionizing radiation-curable resin are embedded in voids of the fibrous substance. Characteristic image receiving medium for sublimation type thermal transfer.