JPH0640170A - Image receiving sheet for thermal transfer recording and production thereof - Google Patents

Abstract

PURPOSE:To obtain an image receiving sheet for thermal transfer recording generating no printing irregularity, having high sensitivity and high transfer density and generating no curling at the time of printing. CONSTITUTION:In an image receiving sheet for thermal transfer recording, a laminated layer with a thickness of 5-100mum based on polypropylene is laminated on a support composed of a resin or the first resin layer of a support wherein the first resin layer is provided on the surface of a base material directly or through a first undercoat layer and an image receiving layer having dyeing properties to a heat-diffusible dye is laminated on the laminated layer directly or through a second undercoat layer and a second resin layer is laminated on the surface opposite to the image receiving layer of the support directly or through a third undercoat layer or an intermediate layer having a porous structure is laminated on the first resin layer of the support and the image receiving layer having dyeing properties to a heat-diffusible dye is laminated on the intermediate layer directly or through a barrier layer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image-receiving sheet for heat-sensitive transfer recording and a method for producing the same, and more specifically, it does not cause image unevenness, does not cause curl during image formation, and has high sensitivity and high transfer density. The present invention relates to an image-receiving sheet for heat-sensitive transfer recording capable of forming an image and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, as a method for obtaining a color hard copy, a color recording technology such as ink jet, electrophotography, thermal transfer recording and the like has been studied. Of these, the thermal transfer recording method is particularly not limited to the case of color recording, and has advantages such as easy operation and maintenance, downsizing of the apparatus, and cost reduction. This thermal transfer recording method includes a thermal fusion transfer method and a thermal diffusion transfer method. The latter is a thermal transfer recording method using a sublimation type thermal transfer recording ink sheet having an ink layer containing a sublimable dye on a support. It is also called a sublimation transfer method because the sublimable dye is diffuse-transferred onto the image receiving sheet for use.

This thermal diffusion transfer system can control the gradation of the image by changing the transfer amount of the dye according to the change of the thermal energy of the thermal head, so that, for example, three colors such as cyan, magenta and yellow can be used. By carrying out overlapping recording of primary colors, there is a very characteristic advantage that it is possible to easily form a multicolor printing color image having a continuous change in color shade. Due to these advantages, the thermal transfer recording method using the thermal diffusion transfer method has recently been actively used for producing an image recording body having a gradation color image such as a color photographic image.

However, the conventional image receiving sheet for thermal transfer recording used in such a thermal transfer recording method has unevenness on the surface or uneven printing due to adhesion of dust, low transfer sensitivity, or sufficient transfer density. Was not obtained in some cases. As means for solving such problems, JP-A-61-112693 and JP-A-62-114829.
No. 3, No. 62-152793, No. 63-1595,
63-231984, 64-44781, 6
4-47536, JP-A-1-168493, 2-
As described in Japanese Patent Publication No. 92592, a method using a support having a porous structure has been proposed.

Further, JP-A-61-270192,
63-87286, 63-122593, JP-A-1-145192, 1-280586, 2-.
No. 89690, No. 2-241740, No. 3-7668
No. 7, etc., a method of laminating an intermediate layer having a porous structure between a support and an image receiving layer, or JP-A-61-144394 and 61-25879.
No. 3, No. 62-146693, No. 62-151393.
No. 64-5885, 64-26497, etc., there is proposed a method of laminating an intermediate layer made of a resin having cushioning property between a support and an image receiving layer. ing.

However, although these methods considerably improve image unevenness, in some cases they cannot be sufficiently prevented, sufficient transfer density and transfer sensitivity cannot be obtained, and those having a porous structure. In some cases, the heat resistance and the dimensional stability were inferior, so that the curl could not be sufficiently prevented.
When the intermediate layer is provided by the coating method, after coating,
When dried, the coating layer may be curled due to heat shrinkage, or by drying the solvent, it may be inferior to the environment.

[0007] For the purpose of improving these, Japanese Patent Laid-Open No. 1-26
No. 3081, No. 2-106397, No. 2-30568
No. 8, US Pat. Nos. 4,774,224 and 4,9.
As described in, for example, Japanese Patent No. 99,335, there has been proposed one in which a polyolefin resin is melt-extruded and laminated on a base paper made of wood pulp or natural pulp. However, when paper is used as the base material, curling can be prevented, but unevenness in the image occurs due to surface waviness caused by the fibers of the paper, and heat is diffused during printing, resulting in sufficient transfer. In some cases, sensitivity and transfer density could not be obtained.

The present invention has been made to improve the above circumstances. That is, the object of the present invention is to provide image-uniformity-free, high-sensitivity and high transfer density, and to prevent image formation during image formation.
An object of the present invention is to provide a heat-sensitive transfer recording image-receiving sheet capable of forming an image without causing a line and a manufacturing method thereof.

[0009]

As a result of intensive studies, the inventors of the present invention have found that polypropylene is formed on a surface of a base material having a resin layer on at least one side as a support of an image-receiving sheet for thermal transfer recording by a melt extrusion method. It has been found that the above object can be easily achieved by laminating a composition containing as a main component or by providing an intermediate layer having a porous structure.

As a result of further detailed examination, among the above-mentioned laminated layers containing polypropylene as a main component, a laminated layer having a specific thickness is effective, and it is more effective if a specific additive is added to this laminated layer. Further, it has been found that the following results can be obtained by devising the structure of the base material and the position where the undercoat layer is laminated.

When a porous intermediate layer is formed on at least one side of a substrate having resin layers on both sides as a support of an image-receiving sheet for heat-sensitive transfer recording, either directly or through a barrier layer, the above-mentioned object is facilitated. It has been found that can be achieved. The present invention has been completed based on these findings.

In the present invention, as shown in the conceptual diagram of FIG. 1, a support has a first resin layer on the surface of a resin or a base material, and a support made of this resin or on the first base.
A laminated layer mainly composed of polypropylene and having a thickness of 5 to 100 μm, which is laminated on the resin layer directly or via the first undercoating layer, and a direct or second undercoating layer on the laminated layer. An image receiving sheet for heat-sensitive transfer recording, comprising: an image receiving layer having a dyeing property with respect to a heat diffusing dye, which is laminated via The subbing layer and / or the second subbing layer is at least one selected from alkyl titanate, titanium-modified aqueous resin, ethylene-vinyl acetate copolymer, acrylic resin, urethane resin, polyester resin and epoxy resin. The heat-sensitive transfer recording image-receiving sheet according to claim 1, wherein the resin is one of the main components.

The invention according to claim 3 is the image-receiving sheet for heat-sensitive transfer recording according to claim 1 or 2, wherein the laminate layer contains white fine particles. Is the image-receiving sheet for heat-sensitive transfer recording according to claim 3, wherein the white fine particles are hollow fine particles, and the invention according to claim 5 is, as shown in the conceptual diagram of FIG. The image-receiving sheet for thermal transfer recording according to any one of claims 1 to 4, wherein the second resin layer is laminated on the surface opposite to the image-receiving layer side, either directly or through a third undercoat layer.

According to a sixth aspect of the present invention, the second resin layer contains polyolefin as a main component and has a thickness of 5 to 100 μm.
m is the image-receiving sheet for thermal transfer recording according to claim 5, wherein the third undercoat layer is an alkyl titanate, a titanium-modified aqueous resin, an ethylene-vinyl acetate copolymer. The heat-sensitive transfer recording image-receiving sheet according to claim 5, wherein the main component is at least one resin selected from among acrylic resins, urethane resins, polyester resins, and epoxy resins.

The invention according to claim 8 is the image-receiving sheet for thermal transfer recording according to claim 1, wherein the support or the first resin layer made of the resin contains polyethylene terephthalate as a main component. The invention described in FIG.
As shown in the conceptual diagram of 1., a support having a third resin layer on one surface of the base material and a second resin layer on the other surface, and a porous body laminated on the third resin layer of the support. A heat-sensitive transfer recording characterized by having an intermediate layer having a structure and an image-receiving layer having a dyeing property to a heat-diffusible dye, which is laminated on the intermediate layer directly or through a barrier layer. It is an image receiving sheet.

According to a tenth aspect of the present invention, the intermediate layer contains a liquid substance which is insoluble in a coating solvent at a coating temperature for coating the intermediate layer. An image-receiving sheet for thermal transfer recording, the invention according to claim 11 is the image-receiving sheet for thermal transfer recording according to claim 9, wherein the substrate is paper, and the invention according to claim 12 is
The heat-sensitive transfer recording image-receiving sheet according to claim 9, wherein the third resin layer and / or the second resin layer contains a polyolefin as a main component.
13. The heat-sensitive transfer recording image-receiving sheet according to claim 12, wherein the third resin layer and / or the second resin layer contains white fine particles.

According to a fourteenth aspect of the present invention, in a support having a first resin layer on one surface of a support or substrate made of a resin, the surface of the support or the first resin layer is directly applied or a coating method is applied. And / or a first subbing layer is formed by a laminating method, and then a resin composition containing polypropylene as a main component is laminated by a melt extrusion method so as to have a thickness of 5 to 100 μm to form a laminating layer. A feeling characterized by forming a second undercoat layer on the layer directly or by a coating method and / or a laminating method, and then laminating an image receiving layer having a dyeing property to a heat diffusible dye. A method for producing an image receiving sheet for thermal transfer recording.

According to a fifteenth aspect of the present invention, a resin is laminated on the surface of the support opposite to the surface on which the image receiving layer is formed, directly or through a third undercoating layer. The method for producing an image-receiving sheet for thermal transfer recording according to claim 14, wherein the support is formed by forming a resin layer, and the invention according to claim 16 is characterized in that the second resin layer is a polyolefin. Using a composition whose main component is
The method for producing an image-receiving sheet for heat-sensitive transfer recording according to claim 15, wherein the image-forming sheet is formed to have a thickness of 100 μm.

According to a seventeenth aspect of the present invention, the substrate having a third resin layer on the surface of the base material and the second resin layer on the other surface of the substrate is directly or directly on the third resin layer. Is surface-treated to form an intermediate layer having a porous structure, and an intermediate layer having a porous structure is formed directly or on the intermediate layer, and then an image receiving layer having a dyeing property to a heat diffusible dye is formed. A method for producing an image-receiving sheet for heat-sensitive transfer recording, which is characterized in that it is formed.

According to the eighteenth aspect of the present invention, the intermediate layer does not dissolve the third resin layer after applying a coating solution in which a resin is dissolved in a solvent to the first resin layer of the support, and The method for producing an image-receiving sheet for thermal transfer recording according to claim 17, which is formed by immersing the solvent in a liquid that dissolves the solvent. The invention according to claim 19 provides a third resin layer and / or The method for producing an image-receiving sheet for thermal transfer recording according to claim 18, wherein the second resin layer is formed on the surface of the base material by a melt extrusion method. Note that FIG. 1 is a conceptual diagram as described above, and details of the laminated structure will be clarified by the following description.

The image-receiving sheet for thermal transfer recording and the method for producing the same according to the present invention will be described in detail below.

(I) Image-receiving sheet for heat-sensitive transfer recording and manufacturing method (1) In the image-receiving sheet for heat-sensitive transfer recording according to claim 1, the support is a resin or a first resin layer on at least one side of a base material. Having a thickness of 5 to 100 laminated on the support.
a laminated layer composed mainly of polypropylene of μm,
An image receiving layer having a dyeing property with respect to a heat diffusible dye, which is laminated on the laminate layer.

(Ia) Support As the support, a support made of resin or a support having a first resin layer on at least one surface of a substrate is used. As such a resin or resin layer, acrylic resins such as acrylic acid ester and methacrylic acid ester, polyester resins such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyarylate, polyvinyl chloride, etc. Polyolefin resin such as polyvinylidene chloride, polyvinylidene fluoride, polyethylene, polypropylene, polystyrene, polyamide resin such as nylon and aromatic polyamide, polyether ether ketone, polysulfone, polyether sulfone, polyimide, polyetherimide, polyparabanic acid , Phenoxy resin, epoxy resin, urethane resin, melamine resin, alkyd resin, phenol resin, fluorine resin, silicone resin and the like.

In the present invention, the resin support or the first resin layer is stretched into a sheet or film,
Heat set is preferable from the viewpoint of dimensional stability,
Among the above-mentioned resins, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, those containing polyester resin such as polyarylate as a main component are preferable, and among them, polyethylene terephthalate, polybutylene terephthalate,
Polyethylene naphthalate, especially those containing polyethylene terephthalate as a main component, are preferable in terms of cost and manufacturing into a sheet or film. Further, the support made of the above resin or the first resin layer may be appropriately selected depending on the application, whether it has no microvoids or has microvoids.

As the support having the first resin layer,
The resin layer is laminated on a plastic film or sheet formed by laminating two or more layers of the above resin layer, or various polymer materials, paper made of metal, ceramic or wood pulp, cellulose pulp, sulfite pulp, or the like. A film or sheet may be used.

The support preferably has high transparency when transparency is required as in the case of a transparent original such as OHP or a sticker attached to glass or the like, and is formed in the case of a reflection image. White pigments such as titanium oxide, zinc oxide, silica, barium sulfate, magnesium carbonate, calcium carbonate, talc and clay may be added to the layer constituting the support in order to enhance the sharpness of the image. The thickness of the support is usually 20 to 1,000 μm,
The thickness is preferably 50 to 500 μm, and is appropriately selected from such a range.

In the present invention, for the purpose of preventing curling and improving texture, an image of the support is formed by a laminating method through an undercoat layer (which may be referred to as a third undercoat layer) described later or directly. A second resin layer may be provided on the surface opposite to the layer. This second resin layer may have the same structure as a laminate layer provided on the image receiving layer side described later, or may have a different structure.

As the resin forming the second resin layer,
Any resin may be used as long as it has a small neck-in and a good draw-down property. For example, high-density polyethylene, medium-density polyethylene, low-density polyethylene, polypropylene, polybutene, polypentene, polystyrene, polyolefin such as ethylene-vinyl acetate copolymer. Examples thereof include resins, polyester resins such as polyethylene terephthalate, ionomer resins, nylon and polyurethane.

Of these, polyolefin resins are preferable, and particularly high density polyethylene, medium density polyethylene,
It is preferable to use low-density polyethylene, polypropylene, polybutene, polypentene, ethylene-polypropylene copolymer or the like alone or in combination of two or more kinds of resins. When polyolefin is used among these resins, the thickness of the resin layer is usually 5 to 100 μm, preferably 10 to 50 μm, and is appropriately selected from such a range.

Further, the resin layer containing polyolefin as a main component may be added with an additive which can be contained in the laminating layer on the image receiving layer side described later. This resin layer can be formed on the support by the same method as that for forming the laminate layer, and if necessary, calendering for smoothing, embossing for matting, etc. May be applied.

(Ib) Laminate Layer In the present invention, a laminate layer having a specific thickness of polypropylene as a main component is laminated on at least one surface of the support. This laminate layer can be formed by a melt extrusion method (sometimes referred to as a hot melt extrusion lamination method). Polypropylene is particularly preferable in terms of curl prevention, transfer sensitivity or transfer density because it has heat resistance and lower thermal conductivity than polyolefin resins used for ordinary lamination, for example, generally used polyethylene.

This polypropylene also has a melt flow rate (test method: ASTM D1238, g / 10 m).
in) is preferably in the range of 0.5 to 15, and more preferably in the range of 1 to 10. And
As long as the drawdown property is good, either a homopolymer or a copolymer may be used, and one kind or two or more kinds of polypropylene may be used in combination.

The thickness of the laminate layer in the present invention is usually 5 to 100 μm, preferably 10 to 50 μm, and is appropriately selected from such a range. When the thickness of the laminate layer is less than 5 μm, the cushioning property is poor, and unevenness in the image tends to occur, and the thickness is 100 μm.
Even if the thickness is larger than m, the cushioning property is not so affected, the balance with the thickness of the support becomes poor, and curling may occur during image formation, which is not preferable.

Lamination by the hot melt extrusion lamination method is disclosed in Japanese Patent Laid-Open No. 1-263081.
No. 1, No. 1-271289, No. 2-106397, No. 2-111586, No. 2-305688, No. 3-4.
It can be carried out by a usual method described in Japanese Patent Publication No. 9991. Further, in order to improve the whiteness of the laminate layer and to improve the heat resistance, it is preferable that the composition containing polypropylene as a main component further contains white fine particles.

As the white fine particles, both inorganic fine particles and organic fine particles can be used as long as they are excellent in thermal stability during lamination. Examples of the inorganic fine particles include silica, titanium oxide, aluminum oxide, zinc oxide, magnesium oxide, metal oxides such as aluminum borate,
Metal salts such as calcium carbonate, magnesium carbonate, barium sulfate, magnesium sulfate, aluminum hydroxide, magnesium hydroxide, and boron nitride, kaolin, clay, talc, zinc white, lead white, sycrelite, quartz, diatomaceous earth,
Examples include pearlite, bentonite, mica, and synthetic mica.

Examples of the organic fine particles include melamine resin particles, guanamine resin particles, styrene-acrylic copolymer resin particles, silicone resin particles and fluororesin particles. Among the white fine particles, hollow resin fine particles are preferable in order to increase the transfer sensitivity or the transfer density, and examples of the hollow fine particles include crosslinked styrene-acrylic hollow resin particles.

When the white fine particles are added, the content in the laminate layer is usually selected in the range of 1 to 30% by weight, preferably 5 to 20% by weight. The average particle size of the white fine particles is usually 0.01 to 2 μm, preferably 0.02 to 1 μm.

In the laminate layer, in addition to the white fine particles, an antistatic agent, a heat stabilizer, an antioxidant, an ultraviolet absorber, a light stabilizer and a fluorescent whitening agent which do not decompose at the temperature during lamination. You may mix | blend additives, such as. In that case, the blending amount is usually preferably 30% by weight or less, and particularly preferably 20% by weight or less in the laminate layer.

In the present invention, when the adhesive strength between the support and the laminate layer is insufficient, the resin layer is subjected to a surface treatment before the composition containing polypropylene as a main component is laminated on the support. It is preferable to keep. As this surface treatment method, known resin surface modification techniques such as corona discharge treatment, flame treatment, ozone treatment, ultraviolet treatment, radiation treatment, surface roughening treatment, chemical treatment, low temperature plasma treatment, and grafting treatment are used as they are. Can be applied. Specifically, "Basics and applications of polymer surfaces (bottom)"
The methods described in Chemistry Doujin, Chapter 2, and "New Handbook of Polymers" Maruzen, Chapter 8, etc. can be referred to, and one or more of them can be used in combination.

The support laminated with the laminate layer by the above-mentioned method may be heat set under dimension constraint to improve the dimensional stability. The surface of the laminate layer may be calendered or embossed as necessary. You may give a process.

(Ic) Image Receiving Layer In the present invention, an image receiving layer is laminated on the laminate layer provided as described above. The image-receiving layer is not particularly limited as long as it has a dyeing property with respect to the heat-diffusible dye, and may be formed into various layer configurations with various materials and various compositions according to the purpose of use. You can For example, it may be the same as the image receiving layer having various materials, compositions, layer constitutions and the like that have been conventionally proposed, or appropriate improvements may be added thereto.

As the resin forming the image receiving layer, for example, vinyl chloride resin, vinylidene chloride resin, styrene resin, polyester resin, acrylic resin, epoxy resin, phenoxy resin, polyvinyl acetal resin,
Cellulose resin, polyvinylpyrrolidone, polycarbonate, polysulfone, polyarylate, polyparabanic acid, polyurethane resin, polyamide resin and the like can be mentioned.

However, these resins may be used alone or in combination of two or more.

When forming the image-receiving layer, the various resins may be crosslinked or cured by utilizing their reaction active points by radiation, heat, moisture, a catalyst or the like. In that case, a radiation-active monomer such as epoxy or acrylic, or a crosslinking agent such as isocyanate can be used. Further, as described below, when the ink layer of the thermal transfer recording ink sheet contains a dye that causes a chelation reaction with a metal ion (forms a chelate dye image) as a dye, it may be added to the image receiving layer as necessary. A metal ion-containing compound or the like may be contained.

Examples of this type of metal ion-containing compound include:
Mention may be made of those exemplified in US Pat. No. 4,987,049. When the metal ion-containing compound is added, its addition amount is preferably 5 to 60% by weight, more preferably 10 to 40% by weight, based on the total amount of the image-receiving layer forming component.

The image-receiving layer may contain a release agent, if necessary.
Additives such as antioxidants, heat stabilizers, UV absorbers, light stabilizers, fillers, pigments and optical brighteners may be added. Further, a plasticizer, a heat-fusible substance, etc. may be added as a sensitizer. In the present invention, it is generally preferable that the total amount of the additives to be added be selected in the range of 0.1 to 30% by weight based on the resin for the image receiving layer.

The thickness of the image receiving layer is usually 3 to 30 μm.
m, preferably 5 to 20 μm. Further, the image receiving layer may be a single layer or, if necessary, may be provided as a multilayer structure of two or more layers having the same composition or different compositions, and the image receiving layer is the surface of the laminate layer. It may be formed over the entire surface or may be formed on a part of the surface thereof, if necessary.

The image-receiving layer is a layer comprising a composition containing polypropylene as a main component, which is prepared by dispersing or dissolving the forming components in a solvent to prepare an image-receiving layer-forming coating liquid. It can be formed by a coating method of coating on the surface and drying, or a hot-melt extrusion laminating method of melt-extruding and laminating a mixture having the components for forming the image receiving layer. Examples of the solvent used in the coating method include water, alcohols, cellosolves, aromatics, ketones, ester solvents, ethers, chlorine solvents and the like.

For the coating, conventionally known gravure roll coating methods, extrusion coating methods, wire bar coating methods, roll coating methods and the like can be adopted. After this coating, by appropriately drying, an image receiving layer having a predetermined dry film thickness is formed. Furthermore, when the adhesive force between the image receiving layer and the laminate layer is insufficient, it is preferable to subject the laminate layer to a surface treatment before forming the image receiving layer. The surface treatment is preferably a method performed on the support described above, and the method can be applied as it is.

(Id) Undercoat layer In the present invention, between the support and the laminate layer,
An undercoat layer is formed between the laminate layer and the image receiving layer, between the laminate layer and the image receiving layer, between the support and the laminate layer, or between the support and the second resin layer. It is preferable. For convenience of description, the undercoat layer formed between the support and the laminate layer is referred to as a first undercoat layer, and the undercoat layer formed between the laminate layer and the image receiving layer is referred to as a second undercoat layer. The undercoat layer formed between the support and the second resin layer may be referred to as a third undercoat layer. The undercoat layer is made of at least one resin selected from alkyl titanate, titanium-modified aqueous resin, ethylene-vinyl acetate copolymer, acrylic resin, urethane resin, polyester resin and epoxy resin.
Can be formed.

The thickness of the undercoat layer is usually 0.01 to 10 μm.
m, preferably 0.1 to 5 μm, and is appropriately selected from such a range. The undercoat layer can be formed by a coating method of dissolving the forming component in a solvent and applying / drying it, or by hot-melt extrusion laminating the forming component.

Examples of the solvent used in the coating method include conventionally known solvents such as water, alcohol, methyl ethyl ketone, toluene, dioxane and cyclohexanone. When adopting the laminating method, a co-extrusion method with the first resin layer on the substrate can also be adopted. An overcoat layer may be laminated on the surface of the image receiving layer for the purpose of preventing fusion between the thermal transfer recording ink sheet and the thermal transfer recording image receiving sheet.

(II) Heat-sensitive transfer recording image-receiving sheet and manufacturing method (No. 2) The heat-sensitive transfer recording image-receiving sheet according to claim 9 has a third resin layer on one surface of the substrate and the other surface. It has a support having a second resin layer, an intermediate layer having a porous structure laminated on the third resin layer, and an image receiving layer laminated on the intermediate layer.

(II-a) Support As the base material, the materials and constitutions described in "Image-receiving sheet for heat-sensitive transfer recording (No. 1)" can be used, but natural pulp, synthetic pulp, Alternatively, a pulp paper made from a mixture thereof is used (in this specification, a substrate using such a pulp paper may be referred to as a base paper). Among these, natural pulp paper containing wood pulp as a main component is preferable.

The base paper is made using a Fourdrinier paper machine or the like,
For the purpose of improving smoothness, it is preferable to carry out calendering using a machine calender, super calender, thermal calender or the like after paper making. Further, a base paper coated with a resin layer containing a pigment for improving smoothness can also be preferably used in the present invention. The base paper in the present invention includes high-quality paper, art paper, coated paper, glossy paper, impregnated paper,
Examples include paperboard. The base paper preferably has a Bekk smoothness of 50 seconds or more in order to provide smoothness when resin layers are provided on both sides thereof, and has a smoothness of 100 seconds or more, and further 200 seconds or more. Is preferred. The thickness of the base paper is not particularly limited, but is 30 to 500 μm.
Is preferable, and 50-250 μm is more preferable.

In the above base paper, if necessary, a sizing agent,
Fixing agent, paper strengthening agent, filler, antistatic agent, dye, pigment,
Additives such as a fluorescent whitening agent, an antioxidant, and an antifriction agent may be contained. The support of the present invention is formed by laminating the third resin layer on one surface of the substrate and the second resin layer on the other surface. The third resin layer is the same as the first resin layer described in “Thermal transfer recording image-receiving sheet (No. 1)”, and regarding the resin used for the second resin layer, “Thermal transfer recording image-receiving sheet ( No. 1) ”and the additives are the same as those described in“ The thermal transfer recording image-receiving sheet (No. 1) ”, and thus detailed description thereof is omitted. . As the method of forming the first resin layer and the second resin layer on the base paper, the hot melt extrusion laminating method described in "Image-receiving sheet for thermal transfer recording (No. 1)" can be preferably used. If necessary, the surface of each resin layer may be calendered or embossed.

In the present invention, the third resin layer and the second resin layer may have the same structure or different structures. The thickness of the third resin layer and the second resin layer is usually in the range of 5 to 100 μm, 10 to 50 μm,
Furthermore, it is preferable to set it in the range of 15 to 40 μm.

(II-b) Intermediate Layer Having Porous Structure In the invention described in claim 9, an intermediate layer having a porous structure is laminated on the surface of the third resin layer of the support.
The intermediate layer having a porous layer structure can be formed by a known method.

For example, (1) a solvent in which a resin is dissolved,
A method of applying and drying a coating liquid comprising a solvent which does not dissolve the resin but is compatible with a solvent which dissolves the resin, (2) a method of applying a coating liquid containing hollow particles, or hollow particles. A method of laminating a composition containing the compound, (3) a method of applying a coating liquid containing an existing foaming agent, or a method of foaming the foaming agent after melt extrusion, (4)
From a method of applying a coating liquid containing bubbles by mechanical agitation, (5) a method of kneading an inert gas when melt-extruding, (6) a solvent-soluble component and an insoluble component Examples of the method include forming the layer to be formed by impregnating a layer in which only the component soluble in the solvent is dissolved, and dissolving the component soluble in the solvent.

In the present invention, it is preferable to make it porous by the method (6). This is because not only a large gap is obtained and an excellent heat insulating effect and cushioning property are obtained, but also an image having high sensitivity and high transfer density and no print unevenness is obtained when an image described below is formed. Among the methods of (6),
A more preferable method is to apply a coating solution in which a resin is dissolved in a solvent, and then pass the resin through a solution in which the resin is insoluble but coagulate the resin to dry the resin.

According to this method, the desired porous layer is formed smoothly, but in a solution in which a resin is further dissolved,
When a certain liquid compound which is not dissolved alone in the solvent at the coating temperature is mixed, a porous layer having a uniform surface and a flat surface can be formed. As the resin forming the porous layer,
Polyester resin, styrene resin, polyvinyl chloride, polyolefin resin such as ethylene-vinyl acetate copolymer, polyvinyl formal, polyvinyl butyral and other polyvinyl acetal resin, nitrocellulose and other cellulose resin, polymethyl methacrylate and other acrylic resin Resins such as resin, polycarbonate, polyarylate, polyimide, polysulfone, polyethersulfone and polyacrylonitrile can be used alone or in combination of two or more.

Examples of the solvent include acetone, ethyl acetate, dioxane, dimethylformamide, dimethylsulfoxide, and the like. Examples of the liquid in which the resin is insoluble but the solvent is insoluble include water and alcohol. Examples of the liquid compound that does not dissolve alone in the solvent at the coating temperature include metal soaps, stabilizing aids such as epoxy compounds, and organometallic compounds such as butyltin compounds.

The porous layer may contain, if necessary, an antioxidant, a heat stabilizer, a UV absorber, a light stabilizer, a filler, a pigment, a fluorescent whitening agent, as long as the object of the present invention is not impaired. You may add additives, such as. Further, a plasticizer, a heat-fusible substance, etc. may be added as a sensitizer. To form the porous layer by this method, the method described in JP-A-63-252793 or the like can be used.

The thickness of the porous intermediate layer in the present invention is usually 1 to 50 μm, more preferably 5 to 30 μm.
It is preferable to select the timely within the range. In the present invention, the resin layer in the support may be surface-treated in order to improve the adhesion between the support and the intermediate layer. As the method of this surface treatment, the surface treatment described in "The image receiving sheet for thermal transfer recording (No. 1)" can be adopted.

(II-c) Image Receiving Layer In the present invention, an image receiving layer is laminated on the porous intermediate layer. This image-receiving layer is the same as that described in the section (I-c) in the above "Image-receiving sheet for heat-sensitive transfer recording (No. 1)", and therefore its explanation is omitted.

(II-d) Other Layers Between the image-receiving layer and the porous intermediate layer, this intermediate layer prevents damage due to dissolution or the like during formation of the image-receiving layer, or becomes an intermediate layer of dye during storage. A barrier layer may be provided for the purpose of preventing the migration of the above. This barrier layer may be provided by any resin layer or manufacturing method as long as it does not impair the cushioning property and heat insulating property of the intermediate layer.

For example, a method of applying a resin which is soluble in a solvent which does not dissolve the intermediate layer and which is insoluble in a solvent which dissolves the image receiving layer composition at the time of forming the image receiving layer, and an image receiving layer composition at the time of forming the image receiving layer A resin layer that is insoluble in a solvent that dissolves can be provided on the intermediate layer by hot melt extrusion lamination or a method of transferring by heat and / or pressure.

The thickness of the barrier layer is usually 0.1 to 2
It is preferable to select in the range of 0 μm, more preferably 0.3 to 10 μm. Further, an overcoat layer may be laminated on the surface of the image receiving layer for the purpose of preventing fusion between the thermal transfer recording ink sheet and the thermal transfer recording image receiving sheet.

(III) Thermal Transfer Recording Ink Sheet and Method for Producing the Same The thermal transfer recording ink sheet can basically be formed by laminating an ink layer on a support. (III-a) Support As the above support, any support may be used as long as it has good dimensional stability and can withstand heat during recording with a thermal head, but thin paper such as condenser paper, glassine paper, polyethylene terephthalate, Polyethylene naphthalate, polyamide, polyimide, polycarbonate, polysulfone,
A heat resistant plastic film such as polyvinyl alcohol cellophane or polystyrene can be used. The thickness of the support is preferably 2 to 10 μm. The shape of the support is not particularly limited, and may be any shape such as a wide sheet or film, a narrow tape or a card.

(III-b) Ink Layer The above ink layer contains a heat diffusing dye and a binder as essential components when the ink layer is transferred to the heat-sensitive transfer recording image-receiving sheet by the heat diffusion transfer method. Examples of the heat diffusible dyes include cyan dyes, magenta dyes, and yellow dyes. Examples of cyan dyes include conventionally known naphthoquinone dyes, anthraquinone dyes, azomethine dyes, and the like.

Examples of the magenta dye include conventionally known anthraquinone dyes, azo dyes and azomethine dyes. Examples of the yellow dye include conventionally known methine dyes, azo dyes, quinophthalone dyes, and anthryothiazole dyes. Further, the heat diffusible dye is particularly preferably obtained by a coupling reaction of a compound having an active methylene group of open chain type or closed type with an oxidized form of a p-phenylenediamine derivative and an oxidized form of a p-aminophenol derivative. An indoaniline dye obtained by a coupling reaction between an azomethine dye and a phenol or naphthol derivative and an oxidized form of a p-phenylenediamine derivative or an oxidized form of a p-aminophenol derivative.

The heat diffusible dye contained in the ink layer containing the heat diffusible dye may be any one of a yellow dye, a magenta dye and a cyan dye as long as the image to be formed is a single color. When forming a chelate dye image by a heat diffusible dye and a metal ion, a metal ion-containing compound is blended in the image receiving layer, and the heat diffusible dye is
A dye capable of forming a chelate with the metal ion-containing compound is used.

As the dye that forms a chelate with the metal ion-containing compound, various known dyes can be appropriately selected and used. Specifically, for example, JP-A-59-
78893, 59-109349, and Japanese Patent Application No. 2-
No. 213303, No. 2-214719, No. 2-203
Examples thereof include a cyan image forming dye (hereinafter referred to as a cyan dye), a magenta image forming dye (hereinafter referred to as a magenta dye), and a yellow image forming dye (hereinafter referred to as a yellow dye) described in No. 742.

Among the above dyes, it is preferable to use at least a dye capable of forming a bidentate chelate with the metal ion-containing compound. Examples of such dyes include dyes represented by the following general formula.

[0075]

[Chemical 1]

However, in the formula, X ¹ represents a group of atoms necessary for completing an aromatic carbocycle or a heterocycle in which at least one ring is composed of 5 to 7 atoms,
At least one of the adjacent positions of the carbon atoms bonded to the azo bond is a nitrogen atom or a carbon atom substituted with a chelating group. X ² represents an aromatic heterocycle or an aromatic carbocycle in which at least one ring is composed of 5 to 7 atoms. G represents a chelating group.

Whichever dye compound is used,
Depending on the color tone of the image to be formed, any two or more of the above three types of dyes or other heat diffusible dyes may be included. The amount of the heat diffusible dye used is usually 5 to 70% by weight, more preferably 2% by weight in the ink layer forming composition.
It is 0 to 60% by weight.

As the binder of the ink layer, a cellulose resin, a polyvinyl acetal resin, a styrene resin, an acrylic resin, a rubber resin, an ionomer resin,
Examples thereof include olefin resins and polyester resins.
The various binders may be used alone or in combination of two or more.

Further, various additives can be appropriately added to the ink layer. Examples of the additive include a peelable compound, a filler, and a curing agent capable of reacting with a binder component (for example, a radiation-active compound such as isocyanates, acrylics, and epoxies). Furthermore, as an additive, a heat-melting substance for promoting transfer, for example, a compound described in JP-A-59-106997, such as wax or higher fatty acid ester, can be mentioned.

(III-c) Other Layers The thermal transfer recording ink sheet is not limited to a two-layer structure composed of a support and an ink layer, and other layers may be formed. For example, an overcoat layer may be provided on the surface of the ink layer for the purpose of preventing fusion with the heat-sensitive transfer recording image-receiving sheet and set-off of the heat diffusing dye. Further, the support may have an undercoat layer for the purpose of improving the adhesiveness with the binder and preventing the dye from being transferred to the support and dyeing. Furthermore, on the back surface of the support (the side opposite to the ink layer),
A backing layer may be provided for the purpose of preventing fusing or sticking of the head to the support and wrinkling of the thermal transfer recording ink sheet.

The thickness of the above-mentioned overcoat layer, subbing layer and backing layer is usually 0.1 to 1 μm. To prepare an ink layer for thermal transfer recording, prepare an ink layer-forming coating liquid obtained by dispersing or dissolving the above-mentioned various components forming the ink layer in a solvent, applying this to the surface of a support, and drying. Can be manufactured by.

The binder may be used alone or in combination of two or more in a solvent or dispersed in a latex form. As the solvent, water, ethanol, tetrahydrofuran, methyl ethyl ketone, toluene, xylene,
Examples thereof include chloroform, dioxane, acetone, cyclohexane, and normal butyl acetate.

For the coating, conventionally known surface sequential coating by gravure roll coating method, extrusion coating method, wire bar coating method, roll coating method and the like can be adopted. The ink layer may be formed as a layer containing a monochromatic heat diffusible dye on the entire surface or a part of the surface of the support, and a yellow ink layer, a magenta ink layer and a cyan ink layer may be formed. It may be formed on the entire surface or a part of the surface of the support at regular intervals along the plane direction. Further, in addition to the three ink layers arranged along the plane direction, a black ink layer containing a black image forming substance may be interposed. Regarding the black ink layer, a clear image can be obtained by either the diffusion transfer type or the melt transfer type.

The thickness of the ink layer thus formed is usually 0.2 to 10 μm, preferably 0.3 to 3
μm. The thermal transfer recording ink sheet may be provided with detection marks or the like for forming perforations or detecting the positions of areas having different hues, thereby facilitating use.

(IV) Formation of Image To form an image, the ink layer of the thermal transfer recording ink sheet and the image receiving layer of the thermal transfer recording image receiving sheet are superposed, and an imagewise image is formed at the interface between the ink layer and the image receiving layer. Give heat energy to. Then, the heat-diffusible dye in the ink layer is thermally diffused or sublimated by an amount according to the heat energy applied at the time of image formation, and is transferred to the image-receiving layer side to be received. Dye image) is formed.

A thermal head is generally used as a heat source for providing heat energy.
Known ones such as infrared flash and hot pen can be used. When a thermal head is used as a heat source for applying heat energy, the applied heat energy can be changed continuously or in multiple steps by modulating the voltage or pulse width applied to the thermal head.

When laser light is used as a heat source for giving heat energy, the heat energy to be given can be changed by changing the light quantity of the laser light or the irradiation area. In this case, a laser light absorbing material (for example, carbon black or a near infrared absorbing material in the case of a semiconductor laser) may be present in the ink layer or in the vicinity of the ink layer in order to easily absorb the laser light.

When laser light is used, it is preferable that the thermal transfer recording ink sheet and the thermal transfer recording image receiving sheet are sufficiently brought into close contact with each other. If a dot generator with a built-in acousto-optic element is used, it is possible to give heat energy according to the size of the halftone dot. When an infrared flash lamp is used as a heat source for giving heat energy, it is preferable to perform heating through a colored layer such as black as in the case of using laser light. Alternatively, heating may be performed through a pattern or a halftone dot pattern in which the gradation of the image is continuously expressed, such as black, or a colored layer such as black on one surface and a negative pattern corresponding to the negative of the above pattern may be formed. You may heat in combination.

The thermal energy may be applied from the thermal transfer recording ink sheet side, the thermal transfer recording image receiving sheet side, or both sides, but the effective use of thermal energy is prioritized. In this case, it is desirable to carry out from the thermal transfer recording ink sheet side. By the thermal transfer recording described above, an image of one color can be recorded on the image receiving layer of the image receiving sheet for thermal transfer recording. However, according to the following method, it is also possible to obtain a color image having a color photographic tone which is a combination of the respective colors.

For example, yellow, magenta, cyan, and, if necessary, black heat-sensitive transfer recording heat-sensitive sheets are sequentially replaced, and heat transfer is performed in accordance with each color to obtain a color photographic tone color image formed by combining each color. You can also Further, instead of using the thermal transfer recording ink sheet of each color as described above, a thermal transfer recording ink sheet having an area formed by separately coating each color may be used. This method can also provide a color image of a color photographic tone, but more conveniently, this method has an advantage that the above-mentioned replacement of the thermal transfer recording ink sheet is unnecessary.

Further, after the image is formed by the above method, the heat treatment may be carried out by the above method for the purpose of improving the image storability. For example, over the entire image forming surface,
Heat treatment may be performed using a portion of the thermal head where the ink layer is not provided in the thermal head, or heat treatment such as a heat roll may be newly performed. Further, when the near infrared ray absorbent is contained, the image forming surface may be exposed by using an infrared flash lamp. In either case, the heating means is not limited, but since the purpose is to further diffuse the dye inside the image receiving layer, it is effective and preferable to heat from the support side of the image receiving layer.

[0092]

[0093]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples. In the following, "parts" represents "parts by weight as active ingredients" unless otherwise specified. (Examples 1 to 36) 1. Image-Receiving Sheets for Thermal Transfer Recording The image-receiving sheets for thermal transfer recording shown in Tables 1 and 2 were produced as follows.

<Support> a: White polyvinyl chloride film containing a white pigment having a thickness of 350 μm [Sumilite VSS 3101, manufactured by Sumitomo Bakelite Co., Ltd.] b; Transparent polyethylene terephthalate film having a thickness of 125 μm [Dia foil (stock) ), S] c; white polyethylene terephthalate film containing a white pigment having a thickness of 350 μm [manufactured by ICI, Melinex 226] d; white polyethylene terephthalate film containing a white pigment having a thickness of 250 μm [manufactured by Toyobo Co., Ltd.] , Crisper G1212] e; white polyethylene terephthalate film having a thickness of 100 μm [manufactured by Diafoil Co., Ltd., W900J] f; white polyethylene terephthalate film having a thickness of 50 μm [manufactured by Diafoil Co., Ltd., W900J] having the following composition Adhesive layer The Narunuri coating solution a wire bar coating method, a coating so that the thickness after drying becomes 2 [mu] m,
By drying, a resin film with an adhesive layer was obtained. Adhesive layer forming coating liquid; polyester resin: 6 parts [Toyo Boseki Co., Ltd., Byron 200] Curing agent:・ ・ ・ 4 parts [Nippon Polyurethane Industry Co., Ltd., Coronate HL] Methyl ethyl ketone ・ ・ ・ 80 parts Cyclohexanone・ ・ ・ ・ 10 copies.

As a base material, a high-quality paper having a thickness of 60 μm and a Bekk smoothness of 250 seconds is used. The high-quality paper is laminated with the resin film having an adhesive layer on both sides, and heat-pressed with a heat roll so that air bubbles do not enter. After making it, 100 ℃ ・ 1
The support was formed by heat curing the adhesive layer over time.

<Laminating composition (composition containing polypropylene as a main component)> The following composition containing polypropylene as a main component was melted and sufficiently kneaded, and then the composition was formed on the substrate to a thickness of 10 to 50 μm. Hot melt extrusion lamination so that a laminated layer containing polypropylene as a main component was formed on the substrate. a: Density 0.90 g / cm ³ , melt florate 9 g /
Polypropylene b of 10 min; density of 0.90 g / cm ³ containing 5 parts of titanium oxide having an average particle size of 0.3 μm, melt florate 9 g / 10 m
in polypropylene c; density of 0.90 g / cm ³ containing 12 parts of titanium oxide having an average particle size of 0.3 μm, melt florate of 7 g / 10
min polypropylene d: cross-linked styrene-acrylic hollow resin particles having an average particle size of 0.4 μm [manufactured by Japan Synthetic Rubber Co., Ltd., JSR hollow particles SX
863 (P)] containing 12 parts of density 0.90 g / cm
³ , polypropylene with a melt flow rate of 7g / 10min.

<Undercoat layer> The undercoat layer on the above-mentioned substrate is A,
The undercoat layer on the laminate layer was designated as B, and the undercoat layer of the substrate on the side opposite to the image receiving layer was designated as C, to provide the following undercoat layer.

A; Alkyl titanate in ethyl acetate [manufactured by Matsumoto Trading Co., Organix PC-42]
5 parts of [6] are applied and dried to a thickness of 0.1.
Forming an undercoat layer of μm b: Titanium-modified aqueous resin [manufactured by Matsumoto Trading Co., Organix WS68 in a solution of water / methanol = 8/32]
0, the active ingredient 11%] was applied and dried to form a subbing layer having a thickness of 0.1 μm.

C; A composition containing ethylene-vinyl acetate copolymer as a main component in toluene [manufactured by Toyo Morton Co., Ltd.,
Adcoat AD-1790-15] was dissolved in 10 parts, and the solution was applied and dried to form an undercoat layer having a thickness of 0.5 μm.

D; An undercoat layer forming coating solution having the following composition is applied and dried, and then heat treated at 100 ° C. for 1 hour to cure the undercoat layer to form an undercoat layer having a thickness of 0.5 μm. Layer forming coating liquid: Acrylic resin ・ ・ ・ ・ ・ ・ 7 parts [Sumitomo Bayern Urethane Co., Ltd., Desmophen A450] Curing agent ・ ・ ・····· 3 parts [Coronate HL, manufactured by Nippon Polyurethane Co., Ltd.] Methyl ethyl ketone ··· 80 parts Cyclohexanone 10 parts.

E; In the same manner as in d, an undercoat layer having a thickness of 1.0 μm is formed; a coating liquid for forming an undercoat layer; urethane resin ...・ ・ ・ 7 parts [Takelac A-367H manufactured by Takeda Pharmaceutical Co., Ltd.] Hardener ・ ・ ・ ・ ・ ・ ・ ・ 3 parts [Takeda Pharmaceutical Co., Ltd. Industrial Co., Ltd., Takenate A-7] Methyl ethyl ketone ・ ・ ・ ・ ・ 80 parts Cyclohexanone ・ ・ ・ 10 parts .

F: An undercoating layer having a thickness of 1.0 μm is formed in the same manner as in d; Coating solution for forming an undercoating layer; Polyester resin ...・ ・ 7 parts [Toyobo Co., Ltd., Byron 103] Curing agent ・ ・ ・ ・ ・ ・ ・ ・ 3 parts [Nippon Polyurethane Industry Co., Ltd.] , Coronate L] Methyl ethyl ketone ・ ・ ・ ・ ・ 80 parts Cyclohexanone ・ ・ ・ 10 parts.

In the same manner as in g; d, an undercoat layer having a thickness of 1.0 μm is formed and an undercoat layer forming coating solution; epoxy resin.・ ・ ・ ・ 5 parts [Equified Shell Epoxy Co., Ltd., Epicoat 1001] Curing agent ・ ・ ・ ・ ・ ・ ・ ・ 5 parts Epoxy Co., Ltd., Epomate B-002] Methyl ethyl ketone: 80 parts Cyclohexanone: 10 parts .

H: Corona discharge treatment of the surface of the base material before forming the undercoat layer i: Irradiation of the surface of the base material with ultraviolet rays (low wavelength type: 189 nm) for 10 minutes before forming the undercoat layer UV treatment j: Before forming the undercoat layer, the substrate surface is irradiated with an electron beam from an electron beam accelerator of 750 kv to perform radiation treatment k; Before forming the undercoat layer, the substrate surface is in an Ar atmosphere. It is set in the plasma reactor of the lower cylinder flow type / polarized external electrode system, acrylonitrile is made to flow as a monomer to form a plasma polymerized thin film of acrylonitrile on the surface, and low temperature plasma treatment.

<Image-Receiving Layer> The following image-receiving layer-forming coating liquids were prepared and sequentially coated and dried by a wire bar coating method,
An image receiving layer having a thickness of 20 μm (a, b) or 10 μm (c, d) was formed.

A; Coating liquid for forming image receiving layer; Vinyl chloride resin: 6.0 parts [Vinyl chloride-pt-butyl benzoate copolymer; Tg = 79 ° C, degree of polymerization: 670, vinyl chloride content: 86.9%] Epoxy resin: 3.5 parts [Toto Kasei Co., Ltd. ), Epotote YD-014] Polyester-modified silicone resin 0.5 part [Shin-Etsu Chemical Co., Ltd., X-24-8300] Methyl ethyl ketone ... ... 20 parts Dioxane ... 60 parts Cyclohexanone ...・ 10 copies.

B; Coating liquid for forming image-receiving layer; Styrene-based resin: 6.0 parts [Kane-Ace B, manufactured by Kanegafuchi Chemical Industry Co., Ltd.] -11A] Polyether polyol ・ ・ ・ ・ ・ ・ ・ ・ 2.5 parts [Sumitomo Bayer Urethane Co., Ltd., Desmophen 550U] Light stabilizer ・ ・ ・ ・ ・・ ・ ・ ・ ・ ・ ・ ・ 1.0 part [Ciba-Geigy, Irgafos 168] Polyester-modified silicone resin ・ ・ ・ ・ ・ 0.5 part [Shin-Etsu Chemical Co., Ltd.] , X-24-8300] Methyl ethyl ketone: 60 parts Dioxane: 20 parts Cyclohexanone・ ・ ・ ・ 10 copies.

C; Coating liquid for forming image receiving layer; Vinyl chloride resin: 4.5 parts [Vinyl chloride-dimethyl fumarate copolymer; Tg = 74 ° C, degree of polymerization: 620, vinyl chloride content: 83.5%] Polyether polyol: 2.0 parts [Sumitomo Bayern Urethane Co., Ltd., Desmophen 550U] ] Metal ion-containing compound: 3.0 parts [[Ni ²⁺ (NH ₂ COCH ₂ NH ₂ ) ₃ ] 2 [(C ₆ H ₅ ) ₄ B ] ^- ] Polyester modified silicone resin: 0.5 part [Shin-Etsu Chemical Co., Ltd., X-24-8300] Methyl ethyl ketone: ...・ ・ ・ 60 parts Dioxane ・ ・ ・ ・ ・ ・ 20 parts Cyclo Sanon · · · · · · · · 10 parts.

D; Coating liquid for forming image-receiving layer; Styrenic resin ... 4.0 parts [Japan Synthetic Rubber Co., Ltd., JSR AES110] Polyester polyol: 2.0 parts [Desmophen 670, manufactured by Sumitomo Bayern Urethane Co., Ltd.] Metal ion-containing compound・ 2.5 parts [[Ni ²⁺ (NH ₂ COCH ₂ NH ₂ ) ₃ ] 2 [(C ₆ H ₅ ) ₄ B] ^- ] zinc oxide ... 1.0 part [Sumitomo Cement Co., Ltd., ultrafine zinc oxide ZnO-100] Polyester-modified silicone resin 0.5 part [Shin-Etsu Chemical Industry ( Co., Ltd., X-24-8300] Methyl ethyl ketone ... 60 parts Dioxa ···················· 20 parts of cyclohexanone · · · · · · · · 10 parts.

<Composition mainly containing polyolefin>
After melting a composition containing polyolefin as a main component and thoroughly kneading the mixture, 10 to 50 is formed on a substrate opposite to the surface on which the image receiving layer is provided.
Extrusion lamination was performed so as to have a thickness of μm, and a layer made of a composition containing polyolefin as a main component was formed. a: Density 0.90 g / cm ³ , melt florate 9 g /
Polypropylene b of 10 min; density of 0.90 g / cm ³ containing 5 parts of titanium oxide having an average particle size of 0.3 μm, melt florate 9 g / 10 m
in polypropylene c; 12 parts of titanium oxide having an average particle size of 0.3 μm, density 0.90 g / cm 3, melt florate 7 g / 10
Polypropylene of min d: Crosslinked styrene-acrylic hollow resin particles having an average particle size of 0.4 μm [JSR Hollow particles SX manufactured by Japan Synthetic Rubber Co., Ltd.]
863 (P)] containing 12 parts of density 0.90 g / cm
³ , polypropylene having a melt flow rate of 7 g / 10 min e; density of 0.914 g / cm3, melt flow rate of 7.
Low density polyethylene of 0g / 10min.

F: Titanium oxide 10 having an average particle size of 0.3 μm
1. A low density polyethylene having a density of 0.914 g / cm ³ and a melt flow rate of 7.0 g / 10 min. Ink sheet for thermal transfer recording An ink layer-forming coating solution was prepared to have a thickness of 6 μm as a support.
m polyethylene terephthalate film [Toray Industries, Inc.
Manufactured by Lumirror F53N], the coating liquid for ink layer formation is applied to the corona discharge-treated surface by a wire bar coating method so that the thickness after drying is 1 μm, and the back surface is not corona-treated. Silicone resin [Dainichi Seika Co., Ltd., Dialomer SP-71
Of the nitrocellulose solution containing 50 wt.
The ink sheet for thermal transfer recording shown in Tables 1 and 2 was manufactured by coating and drying so as to have a thickness of 3 μm, and performing back treatment coating.

A: Coating liquid for forming ink layer; Thermal diffusible dye ... 3.0 parts [Nippon Kayaku Co., Ltd., Kayaset Blue 714] Polyvinyl butyral ... 3.0 parts [Sekisui Chemical Co., Ltd., S-REC BX-1] Methyl ethyl ketone ...・ ・ ・ 84 parts Cyclohexanone ・ ・ ・ 10 parts.

B; Ink layer forming coating liquid; Thermal diffusible dye ... 2.5 parts

[0114]

[Chemical 2]

Polyvinyl butyral: 2.5 parts [Sekisui Chemical Co., Ltd., S-REC BX-1] Methyl ethyl ketone:・ ・ ・ 40 parts Dioxane ・ ・ ・ 45 parts Cyclohexanone ・ ・ ・.. 10 copies.

3. Formation of image The thermal transfer recording ink sheet and the thermal transfer recording image-receiving sheet are superposed so that the former ink layer surface and the latter image-receiving layer surface are in contact, and from the support side of the thermal transfer recording ink sheet. An image was formed by applying a thermal head under the following conditions. Then, the thermal transfer recording ink sheet and the thermal transfer recording image receiving sheet were peeled off, and the image was transferred onto the thermal transfer recording image receiving sheet. After recording the image, the print unevenness of the transferred image, the transfer sensitivity, the transfer density, the curl and the adhesive force of the image receiving layer were evaluated according to the following criteria. The results are shown in Tables 3 and 4.

Linear density in main scanning and sub scanning: 8 dots / mm Recording power: 0.6 W / dot Heating time of thermal head: 20 msec (applied energy about 11.2 × 10 ⁻³ J) to 2 msec (applied energy about 1 The heating time was adjusted stepwise between about 1.12 × 10 ⁻³ J).

<Presence or absence of printing unevenness> Printing unevenness (including white spots) of the transferred image was visually determined. ◯: Almost no print unevenness was observed. Δ: Some printing unevenness was observed. ×: Printing unevenness was observed.

<< Transfer Sensitivity >> Reflection density of 1.0 with an optical densitometer
The applied energy (E) that gives the voltage was measured and judged. ◎ ・ ・ ・ ・ E ≦ 4.8 × 10 ^-3 [J] ○ ・ ・ ・ ・ ・ ・ 4.8 × 10 ^-3 [J] <E ≦ 5.2 ×
10 ^-3 [J] △ ・ ・ ・ ・ ・ ・ ・ 5.2 × 10 ^-3 [J] <E ≦ 5.6 ×
10 ⁻³ [J] × ... 5.6 × 10 ⁻³ [J] <E.

<Transfer Density> The maximum reflection density OD value of the image was measured by an optical densitometer (maximum applied energy value). ◎ ・ ・ ・ ・ ・ ・ OD value is 2.5 or more ○ ・ ・ ・ ・ ・ ・ OD value is 2.0 to 2.5 △ ・ ・ ・ ・ ・ ・ OD value is 1.7 to 2. 0 × ... OD value is 1.7 or less.

<Curl> Measurement was carried out with a curl gauge, and the radius of curvature was converted to m and expressed by the reciprocal X (0 to 0.5 before printing). ◎ ・ ・ ・ ・ ・ ・ X <0.5 ○ ・ ・ ・ ・ ・ ・ 0.5 ≦ X <1 △ ・ ・ ・ ・ ・ ・ 1 ≦ X <2 × ・ ・ ・ ・ ・ ・ 2 ≤X.

<Adhesion> After making 2 × 2 mm grid-like cuts deeper than the polypropylene layer on the side of the image receiving layer, the tape peeling test [Scotch Mending Tape 810 manufactured by Sumitomo 3M Ltd.] was used for judgment. did. ⊚ ················································································· No ∙: No peeling occurred at all, except for a slight peeling only at the notched portion. Δ: Less than 20% of the cut portion peeled off. × ・ ・ ・ ・ 20% or more of the notched part peeled off. (Comparative Examples 1 to 8) An image-receiving sheet for heat-sensitive transfer recording and an ink sheet for heat-sensitive transfer recording shown in Table 2 were produced, and after image recording, uneven printing of transfer image, transfer sensitivity, transfer density, curl and adhesion of image-receiving layer. The strength was evaluated according to the same criteria as in Examples 1-36. The results are shown in Table 4.

<Support> g: Coated paper having a thickness of 100 μm and Bekk smoothness of 1500 seconds on both sides <Composition for laminating (composition containing polypropylene as a main component)> Composition containing polypropylene as a main component Then, a layer containing the following composition as a main component was formed.

E; Low-density polyethylene having a density of 0.914 g / cm ³ and a melt flow rate of 7.0 g / 10 min.

F: Titanium oxide 10 having an average particle size of 0.3 μm
Part, low density polyethylene having a density of 0.914 g / cm ³ and a melt flow rate of 7.0 g / 10 min

[0126]

[Table 1]

[0127]

[Table 2]

[0128]

[Table 3]

[0129]

[Table 4]

(Examples 37 to 68) 1. Image-Receiving Sheet for Thermal Transfer Recording The image-receiving sheet for thermal transfer recording shown in Table 5 was produced as follows. <Support> a: A support was manufactured by laminating a transparent polyethylene terephthalate film having a thickness of 25 μm on both sides of a coated paper having a thickness of 100 μm and Beck smoothness of 1500 seconds on both sides via a urethane adhesive layer.

B; 100 μm in thickness, both sides of Bec smoothness of 1500 seconds on both sides, thickness of 25 μm, density of 0.914 g / cm ³ , melt flolate of 7.0 g / on both sides.
A 10-min low-density polyethylene was hot-melt extrusion laminated to produce a support. c; a thickness of 125 μm, a Beck smoothness of 250 seconds on both sides, containing 10 parts of titanium oxide having an average particle size of 0.3 μm, a density of 0.914 g / cm ³ , and a melt flow rate of 7.0 g / 10 min. A low density polyethylene having a thickness of 30 μm on the image receiving layer side and a thickness of 20 μm on the other side was hot melt extruded and laminated to produce a support.

D; thickness of 125 μm, high-quality paper with Bekk smoothness of 250 seconds on both sides, containing 10 parts of titanium oxide having an average particle size of 0.3 μm, density 0.90 g / cm ³ , melt florate 7.0 g / 10 min polypropylene is hot melt extruded and laminated with a thickness of 30 μm on the image receiving layer side and 20 μm on the other side,
The support was manufactured. e; Crosslinked styrene-acrylic hollow resin particles having an average particle size of 0.4 μm (JSR hollow particles SA863 (P)) with an average particle size of 0.4 μm, on high quality paper having a thickness of 120 μm and Bekk smoothness of 250 seconds on both sides. Containing parts, density 0.91
4 g / cm ³ , melt florate 7.0 g / 10 min
Of low density polyethylene of 30 μm on the image receiving layer side and 20 μm on the other side were respectively subjected to hot melt extrusion lamination to produce a support.

<Porous intermediate layer> a: 15 parts of polyurethane resin [Takelac T, manufactured by Takeda Pharmaceutical Co., Ltd.] was added to toluene / isopropyl alcohol = 2 /
40 parts of water was mixed with 100 parts of the solution dissolved in 1, and a slightly turbid solution was sequentially applied onto the support by wire bar coating and dried to produce a porous intermediate layer having a thickness of 20 μm. .

B; A coating solution having the following composition was applied on the above-mentioned support by wire bar coating, immersed in water for 60 seconds to coagulate, and then immersed in hot water at 80 ° C. for porosity and dried. A 20 μm thick porous intermediate layer was produced. Coating liquid for forming intermediate layer: Polyethersulfone: 20 parts [Mitsui Toatsu Chemicals, Inc., 4100P] Butyltin laurate: ... 2 parts [Katsuda Kako Co., Ltd., ADVASTAB T-12P] Epoxy compound ... 2 parts [Katsuda Kako Co., Ltd. ADVASTAB E-82] Silica ...・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ 2 parts [Average particle size; 0.015 μm] Titanium oxide ・ ・ ・ 5 parts [Average particle size] 0.3 μm] Dimethylformamide: 69 parts.

C; A porous intermediate layer was formed on the above-mentioned support from the coating solution having the following composition in the same manner as in b. Polyester for forming intermediate layer: Polyester 25 parts [Elitel UE-3690 manufactured by Unitika Ltd.] Butyltin laurate・ ・ 2 parts [Akishima Chemical Industry Co., Ltd., BL-42A] Barium-zinc organic compound ・ ・ ・ ・ ・ ・ 2 parts [Akishima Chemical Industry Co., Ltd., LT701B] Silica ・ ・ ・・ ・ ・ ・ ・ ・ ・ ・ ・ 2 parts [Average particle size: 0.015 μm] Calcium carbonate ・ ・ ・ ・ ・ ・ ・ ・ 2 parts [Average particle size: 0.2 μm] Dimethylformamide: 67 parts.

D; A porous intermediate layer was formed on the above support from the coating solution having the following composition in the same manner as in b. Coating solution for forming intermediate layer; polyacrylonitrile resin: 20 parts [Mitsui Toatsu Chemicals, Inc., Valex 6000N] Butyltin laurate: 2 Part [Akishima Chemical Industry Co., Ltd., BL-42A] Epoxy compound ... 2 parts [Akishima Chemical Industry Co., Ltd. LT701B] Silica ... .............. 2 parts [average particle size; 0.015 μm] Titanium oxide: 5 parts [average particle size; 3 μm] Dimethylformamide: 69 parts.

<Surface Treatment> Before forming the intermediate layer,
The following surface treatment was performed on the support. a: Corona discharge treatment b: Flame treatment with a flame having a molar ratio of air / methane = 107, flame treatment c: air containing 25 g / m ³ of ozone, ozone treatment of the surface d: titanium tetraisopropoxide Film thickness 0.2μ
It is applied so that it becomes m, and the surface is treated with a primer.

E; Ultraviolet rays on the surface (low wavelength type: 189
(nm) for 10 min, and then treated with ultraviolet light f: 750 kv with an electron beam from an electron beam accelerator,
Radiation treatment on the surface g; Set in a plasma reactor of cylindrical flow type / polarized external electrode system under Ar atmosphere, Ar plasma treatment for 5 min, then take out into the air, low temperature plasma treatment h; It is set in a cylindrical flow type / polarized external electrode type plasma reactor under Ar atmosphere, and acrylonitrile is caused to flow as a monomer to form a plasma polymerized thin film of acrylonitrile on the surface, and the surface is subjected to low temperature plasma treatment.

<Barrier Layer> a: A coating solution for forming a barrier layer having the following composition was sequentially applied on the intermediate layer by wire bar coating and dried to form a barrier layer having a thickness of 1 μm. Barrier layer forming coating solution: Polyvinyl alcohol: 10 parts [Nippon Gosei Chemical Co., Ltd., Gohsenol GL-05] Distilled water: ... --- 90 copies.

B; A barrier layer-forming coating solution having the following composition was added,
Sequential application on the intermediate layer by wire bar coating
It was dried to form a barrier layer having a thickness of 1 μm. Barrier layer forming coating liquid: Polyvinyl acetoacetal: 10 parts [Sekisui Chemical Co., Ltd., S-REC KW-1] Distilled water: ... ... 90 copies.

C; a barrier layer-forming coating liquid having the following composition,
Sequential application on the intermediate layer by wire bar coating
It was dried to form a barrier layer having a thickness of 1 μm. Barrier layer forming coating liquid; gelatin ... 9.7 parts Hardener ... 0.3 parts _{[(NH 2 CH = CHSO 2} CH 2 CONHCH 2 -)
₂ ] Distilled water ... 90 parts.

D; A barrier layer-forming coating solution and an adhesive layer-forming coating solution having the following compositions were prepared on one side of a polyethylene terephthalate film [S, manufactured by Diafoil Co., Ltd.] having a thickness of 25 μm, and the wire was formed. By a coating method, the barrier layer transfer member was formed by successively coating and drying the coated layers so that the thicknesses after drying were 1.5 μm and 0.5 μm, respectively. Next, the surface of the adhesive layer and the surface of the intermediate layer of the barrier layer transfer member are overlapped with each other and subjected to a heat and pressure treatment with a heat roll (temperature 180 ° C., pressure 1.0 Kg / cm ² , feed rate 0.5 cm / sec). The barrier layer was transferred onto the top.

Barrier Layer Coating Liquid: Polymethyl Methacrylate ... 10.0 parts [Mitsubishi Rayon Co., Ltd., DIANAR BR-88] Toluene ...・ ・ ・ 80.0 parts Cyclohexanone ・ ・ ・ 10.0 parts Adhesive layer forming coating liquid: Ethylene-vinyl acetate copolymer: 35.0 parts [Evaflex EV-40Y manufactured by Mitsui DuPont Polychemical Co., Ltd.] Toluene:・ ・ ・ ・ ・ ・ ・ ・ ・ ・ 65.0 copies.

<Image Receiving Layer> The following image receiving layer forming coating liquids were prepared and sequentially coated and dried by a wire bar coating method,
An image receiving layer having a thickness of 20 μm (a, b) or 10 μm (c, d) was formed. a; Coating liquid for image-receiving layer formation; Vinyl chloride resin: 6.0 parts [BASF Co., Laroflex MP-60] Polyvinyl chloride .. 3.5 parts [Shin-Etsu Chemical Co., Ltd., Shin-Etsu PVC TK300] polyester-modified silicone resin. 5 parts [Shin-Etsu Chemical Co., Ltd., X-24-8300] Methyl ethyl ketone ... 60 parts Dioxane ...・ ・ ・ 20 parts Cyclohexanone ・ ・ ・ 10 parts.

B; Coating liquid for forming image-receiving layer; Styrene-based resin: 6.5 parts [Kaneace B, manufactured by Kanebuchi Chemical Co., Ltd.] -11A] Acrylic polyol 2.0 parts [Desmophen A565 manufactured by Sumitomo Bayer Urethane Co., Ltd.] Light stabilizer ........................ 1.0 part [Irgafos 168, manufactured by Ciba-Geigy] Polyester-modified silicone resin ... 0.5 part [Shin-Etsu Chemical Co., Ltd.] Manufactured by X-24-8300] Methyl ethyl ketone: 60 parts Dioxane: 20 parts Cyclohexanone 10 parts.

C; Coating liquid for forming image receiving layer; Vinyl chloride resin: 4.5 parts [Vinyl chloride-dimethyl fumarate copolymer; Tg = 74 ° C, degree of polymerization: 620, vinyl chloride content: 83.5%] Ketone resin: 2.0 parts [Hitachi Chemical Co., Ltd.] Manufactured by Hirac 111] Compound containing metal ion: 3.0 parts [[Ni ²⁺ (NH ₂ COCH ₂ NH ₂ ) ₂ ] ・ 2 [(C ₆ H ₅ ) ₄ B] ^- ] Polyester-modified silicone resin: 0.5 parts [Shin-Etsu Chemical Co., Ltd., X-24-8300] Methyl ethyl ketone: ... ... 60 parts Dioxane ... 20 parts Cyclohexanone ...・ ・ ・ ・ ・ ・ ・ ・ ・ 10 copies.

D; Coating liquid for forming image-receiving layer; Styrene-based resin ... 4.0 parts [Mitsui Toatsu Chemicals, Inc., Lightac- A 200PC] Polyether polyol ... 2.0 parts [Sumitomo Bayern Urethane Co., Ltd., Desmophen 1915U] Metal ion-containing compound ...・ ・ ・ ・ 2.5 parts [[Ni ²⁺ (NH ₂ COCH ₂ NH ₂ ) ₂ ] ・ 2 [(C ₆ H ₅ ) ₄ B] ^- ] titanium oxide ........................ 1.0 part [Idemitsu Kosan Co., Ltd., Idemitsu Titania IT-UD] Polyester-modified silicone resin: 0.5 part [Shin-Etsu Chemical Industrial Co., Ltd., X-24-8300] Methyl ethyl ketone ... 60 parts Dioxane ··················· 20 parts of cyclohexanone · · · · · · · · 10 parts.

2. Ink sheet for thermal transfer recording An ink layer is formed on a corona discharge treated surface of a polyethylene terephthalate film [Lumirror F53N manufactured by Toray Industries, Inc.] having a thickness of 6 μm as a support by adjusting the following ink layer forming coating liquid. The coating liquid for wire coating is applied by the wire bar coating method so that the thickness after drying is 1 μm, and the silicone resin is applied to the back surface that has not been corona treated [Diaomerika SP manufactured by Dainichiseika Co., Ltd.].
-712] in an amount of 50% by weight is applied by a wire bar coating method so that the thickness after drying is 0.3 μm, and the back surface treatment is performed by performing a back surface treatment coating. A recording ink sheet was manufactured.

A; Coating liquid for forming ink layer; Thermal diffusible dye ... 3.0 parts [Nippon Kayaku Co., Ltd., Kayaset Blue 714] Polyvinyl butyral ... 3.0 parts [Sekisui Chemical Co., Ltd., S-REC BX-1] Methyl ethyl ketone ...・ ・ ・ 84 parts Cyclohexanone ・ ・ ・ 10 parts.

B; Ink layer forming coating solution; Thermal diffusible dye: 2.5 parts

[0151]

[Chemical 2]

Polyvinyl butyral: 2.5 parts [Sekisui Chemical Co., Ltd., S-REC BX-1] Methyl ethyl ketone:・ ・ ・ 40 parts Dioxane ・ ・ ・ 45 parts Cyclohexanone ・ ・ ・・ 10 copies.

3. Formation of image The thermal transfer recording ink sheet and the thermal transfer recording image-receiving sheet are superposed so that the former ink layer surface and the latter image-receiving layer surface are in contact, and from the support side of the thermal transfer recording ink sheet. An image was formed by applying a thermal head under the following conditions. Then, the thermal transfer recording ink sheet and the thermal transfer recording image receiving sheet were peeled off, and the image was transferred onto the thermal transfer recording image receiving sheet. After recording the image, the print unevenness of the transferred image, the transfer sensitivity, the transfer density, the curl, the prevention of bleeding, the adhesive force of the image receiving layer, and the coating property of the image receiving layer were evaluated according to the following criteria. The results are shown in Tables 7 and 8.

Linear density in main scanning and sub-scanning: 8 dots / mm Recording power: 0.6 W / dot Heating time of thermal head: 20 msec (applied energy about 11.2 × 10 ⁻³ J) to 2 msec (applied energy about The heating time was adjusted stepwise between 1.12 × 10 ⁻³ J).

<Presence or absence of printing unevenness> Printing unevenness (including white spots) of the transferred image was visually judged. ◯: Almost no print unevenness was observed. Δ: Some printing unevenness was observed. ×: Printing unevenness was observed.

<< Transfer Sensitivity >> Reflection density of 1.0 with an optical densitometer
The applied energy (E) that gives the voltage was measured and judged. ◎ ・ ・ ・ ・ E ≦ 4.8 × 10 ^-3 [J] ○ ・ ・ ・ ・ ・ ・ 4.8 × 10 ^-3 [J] <E ≦ 5.2 ×
10 ^-3 [J] △ ・ ・ ・ ・ ・ ・ ・ 5.2 × 10 ^-3 [J] <E ≦ 5.6 ×
10 ⁻³ [J] × ... 5.6 × 10 ⁻³ [J] <E.

<< Transfer Density >> The maximum reflection density OD value of the image was measured by an optical densitometer (maximum applied energy value). ◎ ・ ・ ・ ・ ・ ・ OD value is 2.5 or more ○ ・ ・ ・ ・ ・ ・ OD value is 2.0 to 2.5 △ ・ ・ ・ ・ ・ ・ OD value is 1.7 to 2. 0 × ... OD value is 1.7 or less.

<Curl> Measurement was carried out with a curl gauge, and the radius of curvature was converted to m and expressed by the reciprocal X (0 to 0.5 before printing). ◎ ・ ・ ・ ・ ・ ・ X <0.5 ○ ・ ・ ・ ・ ・ ・ 0.5 ≦ X <1 △ ・ ・ ・ ・ ・ ・ 1 ≦ X <2 × ・ ・ ・ ・ ・ ・ 2 ≤X.

<< Bleeding Prevention >> The bleeding of images when stored at 70.degree. C. for 3 days and 1 week was visually evaluated. ◎ ・ ・ ・ ・ The image does not blur even if it is stored for 1 week. ○: No bleeding is observed after 3 days, but 1
Very little bleeding was observed during the week. △ ・ ・ ・ ・ Bleeding was slightly observed after 3 days, and 1
Bleeding was observed after a week. × ... Bleeding was observed after 3 days.

<Adhesion> After making a 2 × 2 mm grid-like cut deeper than the intermediate layer on the image-receiving layer side, judgment was made by tape peeling test [Scotch Mending Tape 810 manufactured by Sumitomo 3M Ltd.]. did. ⊚ ················································································· No ∙: No peeling occurred at all, except for a slight peeling only at the notched portion. Δ: Less than 20% of the cut portion peeled off. × ・ ・ ・ ・ 20% or more of the notched part peeled off.

<< Coatability at the time of coating the image-receiving layer >> It was visually judged whether the intermediate layer was violated or not when it was coated. ○ ・ ・ ・ ・ The image receiving layer is formed uniformly. Δ: The coating surface is slightly uneven after the wire bar, and the coating surface is partially uneven. X: The coating surface is not uniform because the wire bar is behind the coating surface.

(Comparative Examples 9 to 15) The image-receiving sheet for heat-sensitive transfer recording and the ink sheet for heat-sensitive transfer recording shown in Table 6 were produced, and after image recording, printing unevenness of transfer image, transfer sensitivity, transfer density, curl, and bleeding. The same criteria as in Examples 37 to 68 were evaluated for prevention, adhesion of the image receiving layer, and coatability of the image receiving layer. The results are shown in Table 8.

1. Image-receiving sheet for heat-sensitive transfer recording <Support> f: 100 μm thick white polyethylene terephthalate [W410 manufactured by Diafoil Co., Ltd.] on both sides, thickness of 2
A low density polyethylene having a density of 0.914 g / cm ³ and a melt flow rate of 7.0 g / 10 min at 5 μm was hot-melt extrusion laminated to produce a support. g; polypropylene-based synthetic paper having a thickness of 130 μm [Oji Yuka Synthetic Paper Co., Ltd., YUPO FPG # 130] containing 10 parts of titanium oxide having an average particle size of 0.3 μm, and a density of 0.9
14 g / cm ³ , melt florate 7.0 g / 10 mi
n low density polyethylene having a thickness of 30 μm on the image receiving layer surface side and a thickness of 20 μm on the other surface side were respectively hot melt extrusion laminated to produce a support.

<Intermediate Layer> e: A coating solution having the following composition was applied onto a substrate by wire bar coating and dried to produce a uniform, non-porous intermediate layer having a thickness of 20 μm. Coating liquid for forming an intermediate layer: Polyester 12.5 parts [Elitel UE-3690 manufactured by Unitika Ltd.] Butyltin laurate ... 1.0 part [Akishima Chemical Industry Co., Ltd., BL-42A] Barium-zinc organic compound ... 1.0 part [Akishima Chemical Industry Co., Ltd., LT701B] Silica .................. 1.0 part [Average particle size; 0.015 .mu.m] Calcium carbonate ..... 1.0 Parts [Average particle size; 0.2 μm] Methyl ethyl ketone: 40.0 parts Toluene: 37.5 parts Cyclohexanone・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ 6.0 copies.

F: A coating liquid having the following composition was used to prepare an intermediate layer having no porosity in the same manner as in e. Coating solution for forming intermediate layer: Polyacrylonitrile: 20 parts [Mitsui Toatsu Chemicals, Inc., Valex 6000N] Butyltin laurate: ... 2 parts [Akishima Chemical Co., Ltd., BL-42A] Epoxy compound ... 2 parts [Akishima Chemical Co., Ltd., LT701B] Silica ...・ ・ ・ ・ ・ ・ ・ ・ 2 parts [Average particle size; 0.015 μm] Titanium oxide ・ ・ ・ 5 parts [Average particle size; 0 .3 μm] Dimethylformamide: 69 parts.

[0166]

[Table 5]

[0167]

[Table 6]

[0168]

[Table 7]

[0169]

[Table 8]

[0170]

According to the present invention, it is possible to provide an image-receiving sheet for thermal transfer recording which has no printing unevenness, high sensitivity and high transfer density, and does not curl during printing, and a method for producing the same.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a configuration of the present invention.

Claims (19)

[Claims] 1. A support having a first resin layer on the surface of a resin or a base material, and a direct or first subbing layer on the support made of this resin or on the first resin layer. And a laminate layer mainly composed of polypropylene and having a thickness of 5 to 100 μm, and a dye for a heat diffusible dye, which is laminated on the laminate layer directly or through a second subbing layer. An image-receiving sheet for heat-sensitive transfer recording, comprising an image-receiving layer having adhesiveness. 2. The first undercoating layer and / or the second undercoating layer is an alkyl titanate, a titanium-modified aqueous resin,
The image-receiving image for thermal transfer recording according to claim 1, which comprises, as a main component, at least one resin selected from an ethylene-vinyl acetate copolymer, an acrylic resin, a urethane resin, a polyester resin and an epoxy resin. Sheet. 3. The image-receiving sheet for thermal transfer recording according to claim 1, wherein the laminate layer contains white fine particles. 4. The image-receiving sheet for thermal transfer recording according to claim 3, wherein the white fine particles are hollow fine particles. 5. On the surface of the support opposite to the image receiving layer side,
The image-receiving sheet for heat-sensitive transfer recording according to any one of claims 1 to 4, wherein the second resin layer is laminated directly or through a third undercoat layer. 6. The image-receiving sheet for thermal transfer recording according to claim 5, wherein the second resin layer contains polyolefin as a main component and has a thickness of 5 to 100 μm. 7. The third undercoat layer is at least one selected from alkyl titanate, titanium-modified aqueous resin, ethylene-vinyl acetate copolymer, acrylic resin, urethane resin, polyester resin and epoxy resin. The heat-sensitive transfer recording image-receiving sheet according to claim 5, wherein the resin is one of the main components. 8. The image-receiving sheet for thermal transfer recording according to claim 1, wherein the support made of the resin or the first resin layer contains polyethylene terephthalate as a main component. 9. An intermediate having a support having a third resin layer on one surface of a base material and a second resin layer on the other surface, and a porous structure laminated on the third resin layer of the support. An image-receiving sheet for heat-sensitive transfer recording comprising a layer and an image-receiving layer having a dyeing property with respect to a heat-diffusible dye, which is laminated on the intermediate layer directly or via a barrier layer. 10. The image-receiving sheet for thermal transfer recording according to claim 9, wherein the intermediate layer contains a liquid substance that is insoluble in a coating solvent at a coating temperature for coating the intermediate layer. 11. The image-receiving sheet for thermal transfer recording according to claim 9, wherein the base material is paper. 12. The method according to claim 9, wherein the third resin layer and / or the second resin layer contains polyolefin as a main component.
An image-receiving sheet for heat-sensitive transfer recording according to item 1. 13. The image-receiving sheet for thermal transfer recording according to claim 12, wherein the third resin layer and / or the second resin layer contains white fine particles. 14. A support having a first resin layer on one surface of a support or a base material made of a resin, which is directly or directly applied to the surface of the support or the first resin layer by a coating method and / or a laminating method. 1 After forming an undercoat layer, a laminate layer is formed by laminating a resin composition containing polypropylene as a main component to a thickness of 5 to 100 μm by a melt extrusion method, and directly on the laminate layer, Alternatively, a second subbing layer is formed by a coating method and / or a laminating method, and then an image receiving layer having a dyeing property with respect to a heat diffusible dye is laminated, and a method for producing an image receiving sheet for thermal transfer recording. Method. 15. A second resin layer is formed by laminating a resin on the surface of the support opposite to the surface on which the image receiving layer is formed, directly or through a third undercoat layer. ,
The method for producing an image-receiving sheet for thermal transfer recording according to claim 14, wherein the support is formed. 16. The method for producing an image-receiving sheet for thermal transfer recording according to claim 15, wherein the second resin layer is formed to a thickness of 5 to 100 μm using a composition containing polyolefin as a main component. 17. A third resin layer on the surface of the base material and a second resin layer on the other surface.
On the third resin layer of the support having a resin layer, directly or after surface treatment of the third resin layer, an intermediate layer having a porous structure is formed, and on the intermediate layer, directly or A method for producing an image-receiving sheet for heat-sensitive transfer recording, comprising forming a barrier layer and then forming an image-receiving layer having a dyeing property to a heat-diffusible dye. 18. The third intermediate layer is formed by applying a coating solution prepared by dissolving a resin in a solvent onto a third resin layer of a support, and then applying the third layer.
The method for producing an image-receiving sheet for thermal transfer recording according to claim 17, which is formed by immersing the resin layer in a liquid that does not dissolve the solvent and dissolves the solvent. 19. The method for producing an image-receiving sheet for thermal transfer recording according to claim 18, wherein the third resin layer and / or the second resin layer is formed on the surface of the base material by a melt extrusion method.