JP2022056101A - Thermal transfer image-receiving sheet, method for producing printed material, and printed material - Google Patents

Abstract

To provide a thermal transfer image-receiving sheet that allows a recess to be formed in a desired region thereof and can give a printed material having a high three-dimensional feeling even by a visual check.SOLUTION: A thermal transfer image-receiving sheet 10 has a substrate 11, a hollow particle-containing layer 12-2, a porous layer 12-1, a transparent film 13, and a reception layer 14, in the stated order in the thickness direction. The transparent film has a thickness of 10 μm or more and 45 μm or less. The reception layer has a surface roughness Ra of 0.90 μm or less.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a thermal transfer image receiving sheet, a method for manufacturing a printed matter, and a printed matter.

Conventionally, various image forming methods are known. Among them, the sublimation type thermal transfer method can freely adjust the density gradation, has excellent reproducibility of neutral colors and gradations, and can form a high-quality image comparable to a silver halide photograph.

In the sublimation type thermal transfer method, a thermal transfer sheet provided with a sublimation transfer type coloring layer containing a sublimation dye and a thermal transfer image receiving sheet provided with a receiving layer are superposed, and then the thermal transfer sheet is heated by a thermal head provided in the printer. , The sublimation dye in the sublimation transfer type colored layer is transferred to the receiving layer to form an image, whereby a printed matter is obtained (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2001-39043

In recent years, a wide variety of designs are required for the printed matter obtained by the above-mentioned method. For example, for the purpose of expressing the rarity of a printed matter, there is a demand for a printed matter having a high three-dimensional effect.

The present inventors provide a layer in which a recess is formed when heat is applied to the thermal transfer image receiving sheet (hereinafter, also referred to as “heat-sensitive recess forming layer”), and applies heat to a desired region of the heat-sensitive recess forming layer. It was examined to give a three-dimensional effect to the printed matter by forming a concave portion. However, the present disclosures have found that in this case, although the recess is formed, the three-dimensional effect by visual inspection may not be sufficient.

One problem to be solved in the present disclosure is to provide a thermal transfer image receiving sheet capable of forming a recess in a desired region and obtaining a printed matter having a high three-dimensional effect even by visual inspection.
One problem to be solved in the present disclosure is to provide a method for manufacturing a printed matter having a high three-dimensional effect even by visual inspection, using the thermal transfer image receiving sheet.
One problem to be solved in the present disclosure is to provide a printed matter having a high three-dimensional effect even by visual inspection.

The heat transfer image receiving sheet of the present disclosure comprises a base material, a hollow particle-containing layer, a porous layer, a transparent film, and a receiving layer in this order in the thickness direction, and the thickness of the transparent film is 10 μm or more and 45 μm. The surface roughness Ra of the surface of the receiving layer is 0.90 μm or less.

The method for manufacturing the printed matter of the present disclosure includes the step of preparing the thermal transfer image receiving sheet and the process of preparing the thermal transfer image receiving sheet.
The process of forming an image on the receiving layer of the thermal transfer image receiving sheet,
The process of forming recesses in the thermal transfer image receiving sheet and
including.

The printed matter of the present disclosure is a printed matter manufactured by using the above-mentioned thermal transfer image receiving sheet.
The base material, the hollow particle-containing layer, the porous layer, the transparent film, and the receiving layer on which an image is formed are provided in this order in the thickness direction.
A recess having a depth of 5 μm or more is formed.

According to the present disclosure, a thermal transfer image receiving sheet capable of forming a recess in a desired region and a printed matter having a high three-dimensional effect visually can be obtained, a method for manufacturing a printed matter having a high three-dimensional effect visually, and a visual inspection. Can also provide imprints with a high three-dimensional effect.

FIG. 1 is a schematic cross-sectional view showing an embodiment of the thermal transfer image receiving sheet of the present disclosure. FIG. 2 is a schematic cross-sectional view showing a step of forming a recess in the heat transfer image receiving sheet of the present disclosure. FIG. 3 is a schematic cross-sectional view showing an embodiment of a recess formed in the thermal transfer image receiving sheet of the present disclosure shown in FIG. FIG. 4 is a schematic cross-sectional view showing an embodiment of a recess formed in the thermal transfer image receiving sheet of the present disclosure shown in FIG. FIG. 5 is a schematic cross-sectional view showing an embodiment of the printed matter of the present disclosure. FIG. 6 is a schematic cross-sectional view showing an embodiment of the printed matter of the present disclosure. FIG. 7 is a schematic cross-sectional view showing an embodiment of the printed matter of the present disclosure. FIG. 8 is a schematic cross-sectional view showing an embodiment of the printed matter of the present disclosure. FIG. 9 is a schematic cross-sectional view showing an embodiment of the printed matter of the present disclosure.

Hereinafter, embodiments of the present disclosure will be described with reference to drawings and the like. The present disclosure can be implemented in many different forms and is not construed as being limited to the description of the embodiments exemplified below.

In order to clarify the explanation, the drawings may schematically represent the width, thickness, angle, shape, etc. of each part as compared with the actual form. However, the drawings are merely examples and do not limit the interpretation of the present disclosure. In the present specification and each figure, the same elements as those described above with respect to the above-mentioned figures may be designated by the same reference numerals, and detailed description thereof may be omitted as appropriate. For convenience of explanation, the terms "upper" and "lower" may be used for explanation, but the vertical direction may be reversed. The same applies to the left-right direction.

[Thermal transfer image receiving sheet]
As shown in FIG. 1, the thermal transfer image receiving sheet 10 of the present disclosure has a base material 11, a hollow particle-containing layer 12-2, a porous layer 12-1, a transparent film 13, and a receiving layer 14. Prepare in this order in the vertical direction. In FIGS. 2 and 2 and thereafter, the layers between the base material 11 and the receiving layer 14 are collectively referred to as a laminated body portion 18 from the viewpoint of avoiding complexity of the drawings.
Hereinafter, the thermal transfer image receiving sheet of the present disclosure may be simply referred to as a “thermal transfer image receiving sheet”.

The hollow particle-containing layer has voids derived from the hollow particles inside. Since the porous layer is porous, it has voids inside. Therefore, the hollow particle-containing layer and the porous layer can function as a heat-sensitive cambium in which recesses are formed when heat is applied, particularly when heated and pressurized. In FIG. 1, the heat-sensitive recess forming layer 12 is composed of a hollow particle-containing layer 12-2 and a porous layer 12-1.

Hereinafter, the hollow particle-containing layer and the porous layer may be collectively referred to as a heat-sensitive cambium. The nth heat-sensitive cambium forming layer in order from the receiving layer side may be referred to as "nth heat-sensitive cambium forming layer". n is an integer of 1 or more. When the heat-sensitive cambium is two layers, the first heat-sensitive cambium is a porous layer and the second heat-sensitive cambium is a hollow particle-containing layer.

The thermal transfer image receiving sheet includes a substrate, a hollow particle-containing layer, a porous layer, a transparent film having a thickness of 10 μm or more and 45 μm or less, and a receiving layer having a surface roughness Ra of 0.90 μm or less in the thickness direction. Prepare for this order. By providing the hollow particle-containing layer and the porous layer in this order, the thermal transfer image receiving sheet forms recesses by applying heat, and as a result, the image formed on the surface of the receiving layer can be given a three-dimensional effect. In addition to this, when the surface roughness Ra of the surface of the receiving layer on which the image is formed is 0.90 μm or less, the visual stereoscopic effect of the image can be further improved.

By setting the concave portion forming region on the thermal transfer image receiving sheet, it is possible to give a three-dimensional effect to the printed matter and improve its design. For example, by forming a recess in a region on the receiving layer where an image is formed, or by forming a recess in a region other than the region where the image is formed, the image can be given a three-dimensional effect.

In one embodiment, the thermal transfer image receiving sheet is heated from the receiving layer side under high temperature conditions by, for example, using a thermal head to form a recess in the heat-sensitive cambium. When the recess is formed in the heat-sensitive recess forming layer by applying heat, the transparent film and the receiving layer provided on the heat-sensitive recess forming layer also follow the recess, and the recess is formed on the surface of the thermal transfer image receiving sheet. As a result, it is possible to give a high three-dimensional effect to the printed matter to be manufactured.

By forming a plurality of concave portions on the surface of the thermal transfer image receiving sheet, a region that becomes a relatively convex portion may be formed. Specifically, the design of the printed matter can be improved by forming the concave portion so that the convex portion represents a character, a pattern, or the like. Further, as will be described later, the design can be further improved by forming an image such as a hologram image on the convex portion.

In the present disclosure, the recess is not limited to the one formed in the center of the thermal transfer image receiving sheet shown in FIG. 2, and may be formed at the end of the thermal transfer image receiving sheet as shown in FIG. The recesses may be formed in one place of the thermal transfer image receiving sheet, or may be formed in a plurality of places. As shown in FIG. 4, by forming concave portions at a plurality of locations on the thermal transfer image receiving sheet, convex portions representing characters, patterns, and the like can be formed.

Hereinafter, each layer included in the thermal transfer image receiving sheet of the present disclosure will be described in detail.

(Base material)
Examples of the base material include a paper base material and a film.

Examples of the paper base material include condenser paper, glassin paper, sulfated paper, synthetic paper, high-quality paper, art paper, coated paper, non-coated paper, cast-coated paper, wallpaper, cellulose fiber paper, synthetic resin inner paper, and backing paper. And impregnated paper. Examples of the impregnated paper include synthetic resin impregnated paper, emulsion impregnated paper and synthetic rubber latex impregnated paper.

Examples of the film include a film made of a resin (hereinafter, also referred to as “resin film”). Examples of the resin include polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT) and polyethylene naphthalate (PEN); polyolefins such as polyethylene (PE), polypropylene (PP) and polymethylpentene; polyvinyl chloride, and the like. Vinyl resins such as polyvinyl chloride and vinyl chloride-vinyl acetate copolymers; (meth) acrylic resins such as poly (meth) acrylates and polymethyl (meth) acrylates; styrene resins such as polystyrene (PS); polycarbonates; and ionomer resins. Can be mentioned.

In the present disclosure, "(meth) acrylic" includes both "acrylic" and "methacrylic". Further, "(meth) acrylate" includes both "acrylate" and "methacrylate".

When the base material is a resin film, the resin film may be a stretched film or an unstretched film. From the viewpoint of mechanical strength, a uniaxially stretched film or a biaxially stretched film is preferable as the base material.

The above-mentioned laminated body of paper base material and film can also be used as a base material. The laminate can be produced by using a method such as a dry lamination method, a wet lamination method and an extraction method.

From the viewpoint of mechanical strength, the thickness of the base material is preferably 20 μm or more and 500 μm or less, more preferably 50 μm or more and 500 μm or less, and further preferably 100 μm or more and 500 μm or less.

(Hollow particle-containing layer)
The thermal transfer image receiving sheet includes a hollow particle-containing layer.

In one embodiment, the hollow particle-containing layer contains hollow particles and a binder material.
Examples of the hollow particles include organic hollow particles, inorganic hollow particles, and organic-inorganic composite hollow particles, and organic hollow particles and organic-inorganic composite hollow particles are preferable from the viewpoint of dispersibility. The hollow particles may be foamed particles or non-foamed particles. The hollow particle-containing layer can contain one type or two or more types of hollow particles.

The organic hollow particles are composed of a resin material. Examples of the resin material include styrene resin, (meth) acrylic resin, phenol resin, fluororesin, polyacrylonitrile, imide resin and polycarbonate.

The organic hollow particles can be produced, for example, by enclosing a foaming agent such as butane gas in resin particles and heating and foaming the particles. Organic hollow particles can also be produced by utilizing emulsion polymerization. Commercially available organic hollow particles may be used.

Examples of the organic-inorganic composite hollow particles include hollow particles in which the surface of the organic hollow particles is modified with an inorganic material. Examples of the organic hollow particles include the above-exemplified organic hollow particles. Examples of the inorganic material include talc, calcium carbonate, silica and alumina. In one embodiment, the organic-inorganic composite hollow particles are hollow particles in which the surface of the polyacrylonitrile-based hollow particles is modified with talc. Commercially available organic-inorganic composite hollow particles may be used.

The average particle size of the hollow particles is preferably 1 μm or more, more preferably 2 μm or more, still more preferably 15 μm or more, and particularly preferably 18 μm or more from the viewpoint of particularly excellent recess forming property. The average particle size of the hollow particles is preferably 40 μm or less, more preferably 35 μm or less, in consideration of, for example, the thickness of the hollow particle-containing layer.

The average particle size of the hollow particles is measured by electron microscopy. Specifically, the particle diameter is obtained as the average value of the major axis diameter and the minor axis diameter of each particle by the electron microscopy method, and the arithmetic mean of the particle diameters of 100 particles is taken as the average particle diameter.

The true specific gravity of the hollow particles is preferably 0.01 or more and 0.50 or less, more preferably 0.05 or more and 0.40 or less, and 0.10 or more and 0.30 or less from the viewpoint of uniform dispersibility in the layer. Is even more preferable. The true specific gravity of the hollow particles can be measured by the gas substitution type pycnometer method (constant volume expansion method).

The content ratio of the hollow particles in the hollow particle-containing layer is preferably 20% by mass or more and 80% by mass or less, more preferably 30% by mass or more and 70% by mass or less, and further preferably 40% by mass or more and 70% by mass or less. This makes it possible to improve the formability of the recesses of the thermal transfer image receiving sheet.

Examples of the binder material include polyurethane, polyester, urethane-modified polyester, cellulose resin, vinyl resin, (meth) acrylic resin, polyolefin, styrene resin, gelatin and its derivatives, modified styrene acrylic acid copolymer, polyvinyl alcohol, and polyethylene oxide. , Polyvinylpyrrolidone, purulan, dextran, dextrin, polyacrylic acid and salts thereof, agar, κ-carrageenan, λ-caraginan, ι-carrageenan, casein, xantene gum, locust bean gum, alginic acid and arabic rubber. The hollow particle-containing layer can contain one or more binder materials.

The content ratio of the binder material in the hollow particle-containing layer is preferably 20% by mass or more and 80% by mass or less, more preferably 30% by mass or more and 70% by mass or less, and further preferably 30% by mass or more and 60% by mass or less. This makes it possible to improve the formability of the recesses of the thermal transfer image receiving sheet.

The hollow particle-containing layer can contain additives. Additives include, for example, plasticizers, fillers, UV stabilizers, color inhibitors, surfactants, optical brighteners, matting agents, deodorants, flame retardants, weather resistant agents, charge inhibitors, threads. Examples thereof include friction reducing agents, slipping agents, antioxidants, ion exchangers, dispersants, ultraviolet absorbers, and colorants such as pigments and dyes. The hollow particle-containing layer can contain one or more additives.

The porosity of the hollow particle-containing layer is preferably 10% or more and 80% or less, and more preferably 20% or more and 80% or less. This makes it possible to easily form a recess in the thermal transfer image receiving sheet.

In the present disclosure, the porosity of the heat-sensitive cambium forming layer such as the hollow particle-containing layer and the porous layer is determined by the formula (1-the bulk specific density of the heat-sensitive recess forming layer / the specific gravity of the material constituting the heat-sensitive recess forming layer) × 100. calculate.

When the specific gravity of the material constituting the heat-sensitive cambium is unknown, for example, a pressure of 0.49 MPa at 150 ° C. is applied to the heat-sensitive cambium formed on the substrate for 10 seconds using a heat sealer. The void ratio is calculated from the formula {1- (t2 / t1)} × 100, where t1 is the thickness of the heat-sensitive cambium before heating and pressurizing and t2 is the thickness after heating and pressurizing. If it is difficult to calculate the void ratio by the above method, obtain a cross-sectional image of the heat-sensitive recess forming layer with a scanning electron microscope (manufactured by Hitachi High Technology Co., Ltd., trade name: S3400N), and total the cross-sectional image. From the area (a) and the area (b) occupied by the voids (vacancy), it may be calculated by the formula ((b) / (a)) × 100.

The thermal transfer image receiving sheet may include one or more hollow particle-containing layers. The number of hollow particle-containing layers is preferably 1 or more and 3 or less, more preferably 1 or more and 2 or less, and further preferably 1 layer.

The thickness of the hollow particle-containing layer is preferably 10 μm or more and 190 μm or less, more preferably 15 μm or more and 150 μm or less, and further preferably 25 μm or more and 130 μm or less. This makes it possible to improve the formability of the recesses of the thermal transfer image receiving sheet. When the thermal transfer image receiving sheet includes two or more hollow particle-containing layers, it is preferable that the total thickness of the hollow particle-containing layers is in the above range.

For the hollow particle-containing layer, for example, the above material is dispersed or dissolved in water or a suitable organic solvent to prepare a coating liquid, and the coating liquid is applied onto a substrate or the like by a known coating means. It can be formed by forming a coating film and drying it. Examples of the coating means include a roll coating method, a reverse roll coating method, a gravure coating method, a reverse gravure coating method, a bar coating method and a rod coating method.

(Porous layer)
The thermal transfer image receiving sheet includes a porous layer.
The porous layer is a layer containing a structure having pores connected inside.

In one embodiment, the porous layer contains a resin material. Examples of the resin material include polyolefins such as PE and PP; vinyl resins such as polyvinyl acetate, vinyl chloride-vinyl acetate copolymer and ethylene-vinyl acetate copolymer; polyesters such as PET and PBT; styrene resins; Polyolefins can be mentioned. Among these, polyolefin is preferable, and PP is more preferable, from the viewpoint of heat insulating property and cushioning property of the porous layer. The porous layer can contain one or more resin materials.
The content ratio of the resin material in the porous layer is preferably 50% by mass or more, more preferably 70% by mass or more, still more preferably 80% by mass or more.

The porous layer can contain additives. Additives include, for example, plasticizers, fillers, UV stabilizers, color inhibitors, surfactants, optical brighteners, matting agents, deodorants, flame retardants, weather resistant agents, charge inhibitors, threads. Examples thereof include friction reducing agents, slipping agents, antioxidants, ion exchangers, dispersants, ultraviolet absorbers, and colorants such as pigments and dyes. The porous layer can contain one or more additives.

The porosity of the porous layer is preferably 10% or more and 60% or less, and more preferably 20% or more and 50% or less. As a result, the depth of the recess can be further improved, and the ease of forming the recess can be improved.

The porosity of the porous layer is preferably smaller than the porosity of the hollow particle-containing layer. This makes it possible to suppress the formation of unintended recesses during image formation and transfer of the protective layer, that is, the formation of recesses under non-high temperature conditions. Hereinafter, these are collectively referred to as embossing inhibitory property at the time of printing.

The thermal transfer image receiving sheet may include one or more porous layers. The number of layers of the porous layer is preferably 1 or more and 3 or less, more preferably 1 or more and 2 or less, and further preferably 1 layer. A plurality of porous layers may be laminated via an adhesive layer.

The thickness of the porous layer is preferably 10 μm or more and 150 μm or less, more preferably 15 μm or more and 140 μm or less, further preferably 25 μm or more and 130 μm or less, further preferably 30 μm or more and 100 μm or less, and particularly preferably 40 μm or more and 100 μm or less. As a result, the depth of the recess to be formed can be improved, and the ease of forming the recess can be improved. When the thermal transfer image receiving sheet includes two or more porous layers, it is preferable that the total thickness of the porous layers is in the above range.

The total thickness of the porous layer and the hollow particle-containing layer is preferably 30 μm or more, more preferably 50 μm or more, still more preferably 65 μm or more. As a result, the depth of the recess to be formed can be improved, and the ease of forming the recess can be improved. Further, the image density formed on the receiving layer can be improved. The total thickness of the porous layer and the hollow particle-containing layer is preferably 200 μm or less from the viewpoint of transportability in the printer and processability.

In one embodiment, a porous film is used as the porous layer. The porous film can be produced by a known method, for example, by forming a film of a mixture of incompatible organic particles or inorganic particles kneaded with the above resin material and arbitrarily stretching the film. Alternatively, the porous film can be produced by forming a mixture containing a first resin material and a second resin material having a melting point higher than that of the first resin material into a film and arbitrarily stretching the mixture.

The porous film is not limited to the porous film produced by the above method, and a commercially available porous film may be used.

(Transparent film)
The thermal transfer image receiving sheet includes a transparent film between the receiving layer and the porous layer. By providing the transparent film on the porous layer of the thermal transfer image receiving sheet, the thermal transfer image receiving sheet can be provided with a receiving layer having a small surface roughness Ra while having a hollow particle-containing layer and a porous layer. Therefore, the visual stereoscopic effect of the image formed on the surface of the receiving layer can be enhanced.

In one embodiment, the transparent film contains a resin material. The resin material is not particularly limited as long as a transparent film can be formed, and for example, polyolefins such as PE and PP; vinyl resins such as polyvinyl acetate, vinyl chloride-vinyl acetate copolymer and ethylene-vinyl acetate copolymer; PET. And polyesters such as PVC; styrene resins; and polyamides. Among these, polyolefin and polyester are preferable from the viewpoint of transparency and smoothness of the film, PP and PET are more preferable, and PP is further preferable from the viewpoint of recess forming property. The transparent film can contain one or more resin materials.

The content ratio of the resin material in the transparent film is preferably 50% by mass or more, more preferably 70% by mass or more, still more preferably 80% by mass or more.

The transparent film can contain additives. Additives include, for example, plasticizers, UV stabilizers, color inhibitors, surfactants, matting agents, deodorants, flame retardants, weathering agents, charge inhibitors, thread friction reducing agents, slip agents, anti-slip agents. Examples include oxidizing agents, ion exchangers, dispersants and UV absorbers. The transparent film may contain one or more additives.

The transparent film may be a stretched film or an unstretched film. From the viewpoint of mechanical strength, the transparent film is preferably a uniaxially stretched film or a biaxially stretched film.

The thermal transfer image receiving sheet may include one or more transparent films. The number of layers of the transparent film is preferably 1 or more and 3 or less, more preferably 1 or more and 2 or less, and further preferably 1 layer. A plurality of transparent films may be laminated via an adhesive layer.

The thickness of the transparent film is 10 μm or more and 45 μm or less, preferably 20 μm or more and 40 μm or less, and more preferably 30 μm or more and 40 μm or less. When the thermal transfer image receiving sheet includes two or more transparent films, it is preferable that the total thickness of the transparent films is in the above range. When the thickness is 45 μm or less, the high recess-forming property of the heat-sensitive cambium can be maintained. When the thickness is 10 μm or more, particularly 20 μm or more, the surface roughness Ra of the surface of the receiving layer can be sufficiently reduced. Therefore, the surface roughness Ra of the surface of the receiving layer can be reduced while maintaining the good recess forming property of the thermal transfer image receiving sheet.

The total light transmittance of the transparent film is preferably 70% or more, more preferably 80% or more, still more preferably 85% or more. The total light transmittance is measured according to JIS K7361-1. By providing a transparent film layer between the receiving layer and the porous layer, the surface roughness Ra on the surface of the receiving layer can be reduced.

In one embodiment, the surface roughness Ra of the surface of the transparent film used as the transparent film in the thermal transfer image receiving sheet is preferably 1.2 μm or less, more preferably 1.0 μm or less, still more preferably 0.8 μm or less. By using such a film having a smooth surface, the surface roughness Ra of the surface of the receiving layer can be reduced. The method for measuring the surface roughness Ra will be described later.

The porosity of the transparent film is preferably less than 10%, preferably 5% or less, and more preferably 1% or less. Thereby, the surface roughness Ra of the surface of the receiving layer can be sufficiently reduced.

(Receptive layer)
The receiving layer is a layer that receives the sublimation dye transferred from the sublimation transfer type coloring layer (dye layer) included in the thermal transfer sheet and maintains the formed image.

In one embodiment, the receiving layer contains a resin material. The resin material is not limited as long as it is a resin that can be easily dyed with a dye. For example, polyolefin, vinyl resin, (meth) acrylic resin, styrene resin, polyester, polyamide, polycarbonate, polyurethane, cellulose resin and ionomer. Resin is mentioned. The receiving layer may contain one or more resin materials.

The content ratio of the resin material in the receiving layer is preferably 80% by mass or more and 98% by mass or less, and more preferably 90% by mass or more and 98% by mass or less.

In one embodiment, the receiving layer contains a mold release agent. This makes it possible to improve the releasability between the thermal transfer image receiving sheet and the thermal transfer sheet.

Examples of the mold release agent include solid waxes such as polyethylene wax, amide wax, and Teflon (registered trademark) powder, fluorine-based or phosphoric acid ester-based surfactants, and silicone mold release agents.

Examples of the silicone release agent include silicone oil, silicone resin, and modified silicones thereof. As the modified silicone, amino-modified silicone, epoxy-modified silicone, aralkyl-modified silicone, epoxy-aralkyl-modified silicone, alcohol-modified silicone, vinyl-modified silicone and urethane-modified silicone are preferable, and epoxy-modified silicone, aralkyl-modified silicone and epoxy-aralkyl-modified silicone are preferable. Is more preferable.
The receiving layer may contain one or more mold release agents.

The content ratio of the release agent in the receiving layer is preferably 0.5% by mass or more and 20% by mass or less, and more preferably 0.5% by mass or more and 10% by mass or less. This makes it possible to improve the releasability between the thermal transfer image receiving sheet and the thermal transfer sheet while maintaining the transparency of the receiving layer.
The receiving layer can contain the above additives.

The surface roughness Ra of the surface of the receiving layer is 0.90 μm or less, preferably 0.10 μm or more and 0.80 μm or less, more preferably 0.20 μm or more and 0.70 μm or less, and further preferably 0.30 μm or more and 0.60 μm or less. preferable. This makes it possible to further improve the visual stereoscopic effect of the image formed on the receiving layer. It is presumed that the reason for this is that the surface of the receiving layer becomes matte due to the application of heat when the recess is formed, a difference in gloss occurs between the heat-applied portion and the heat-non-applied portion, and the feeling of unevenness is enhanced.
The surface roughness Ra can be reduced by providing a transparent film having a smooth surface between the receiving layer and the porous layer, increasing the thickness of the transparent film, and the like.

The surface roughness Ra is an arithmetic mean roughness, which is a value measured according to JIS B 0601. For example, it can be measured with a laser microscope with a surface roughness measuring function (manufactured by KEYENCE CORPORATION, trade name: VK-X series).

The thickness of the receiving layer is preferably 0.5 μm or more and 20 μm or less, and more preferably 1 μm or more and 10 μm or less. This makes it possible to improve the image density formed on the receiving layer.

For the receiving layer, for example, the above-mentioned material is dispersed or dissolved in water or a suitable organic solvent to prepare a coating liquid, and the coating liquid is applied onto a transparent film or the like by the above-mentioned known coating means. It can be formed by forming a coating film and drying it.

(Adhesive layer)
In one embodiment, the heat transfer image receiving sheet of the present disclosure includes an adhesive layer between arbitrary layers, for example, between a transparent film and a porous layer. Thereby, the adhesion between layers can be improved.

In one embodiment, the adhesive layer contains a resin material. Examples of the resin material include vinyl resins such as polyvinyl acetate, polyvinyl butyral (PVB), ethylene-vinyl acetate copolymer and vinyl chloride-vinyl acetate copolymer; polyolefins such as PE and PP; polyester; poly (meth). ) (Meta) acrylic resins such as acrylates and polymethyl (meth) acrylates; polyol resins; and polyurethanes. The adhesive layer may contain one or more resin materials.
The adhesive layer can contain the above additives.

The thickness of the adhesive layer is preferably 0.5 μm or more and 10 μm or less, more preferably 1 μm or more and 8 μm or less, and further preferably 2 μm or more and 5 μm or less. This makes it possible to improve the adhesion between the layers while maintaining the recess forming property in the heat-sensitive recess forming layer.

For the adhesive layer, for example, the above-mentioned material is dispersed or dissolved in water or a suitable organic solvent to prepare a coating liquid, and the coating liquid is applied onto an arbitrary layer by the above-mentioned known coating means. It can be formed by forming a coating film and drying it. In one embodiment, the adhesive layer can be formed by melt extrusion of a resin composition containing the above materials.

(Primer layer)
In one embodiment, the heat transfer image receiving sheet of the present disclosure includes a primer layer between the transparent film and the receiving layer. Thereby, the adhesion between the above layers can be improved.

In one embodiment, the primer layer contains a resin material. Examples of the resin material include polyester, polyurethane, polycarbonate, (meth) acrylic resin, styrene resin, vinyl resin and cellulose resin. The primer layer can contain one or more resin materials.

The primer layer can contain the above additives.
The thickness of the primer layer is preferably 0.1 μm or more and 3 μm or less.

For the primer layer, for example, the above-mentioned material is dispersed or dissolved in water or a suitable organic solvent to prepare a coating liquid, and the coating liquid is applied onto a transparent film by the above-mentioned known coating means. It can be formed by forming a coating film and drying it.

[Printed matter]
The printed matter 20 of the present disclosure is manufactured by using the above-mentioned thermal transfer image receiving sheet, and as shown in FIG. 5, the substrate 11 and the hollow particle-containing layer 12-2, the porous layer 12-1 and the transparent layer 20 are transparent. The laminated body portion 18 including the film 13 (these layers are not shown) and the receiving layer 14 on which an image (not shown) is formed are provided in this order in the thickness direction, and the depth is 5 μm or more. A recess (A in the figure) is formed.

In the present disclosure, the recess is not limited to the one formed in the center shown in FIG. 5, but may be formed at the end as shown in FIG. The recesses may be formed in one place or in a plurality of places. As shown in FIG. 7, by forming concave portions at a plurality of locations on the thermal transfer image receiving sheet, convex portions representing characters, patterns, and the like can be formed.

The image to be formed may be one formed by the transfer of the sublimation dye contained in the sublimation transfer type coloring layer or the transfer of the melt transfer type coloring layer, or one formed by transferring the hologram transfer layer. It may be a combination of these.

In one embodiment, the recess is formed in the background image forming region formed by transferring the sublimation dye on the receiving layer, and the hologram image is formed in the relatively convex region. With such a configuration, it is possible to give a three-dimensional effect to the hologram image formed in the region having a relatively convex portion, and it is possible to improve the design of the printed matter. Further, by providing a difference in brightness between the background image and the hologram image, the stereoscopic effect can be further improved.

The image formed on the receiving layer is not particularly limited to characters, patterns, symbols, figures, combinations thereof, and the like. The image can be formed on the receiving layer by using, for example, a conventionally known thermal transfer sheet of a sublimation type thermal transfer method or a melt type thermal transfer method.

(Protective layer)
In one embodiment, the printed material 20 of the present disclosure includes a protective layer 21 on the receiving layer 14, as shown in FIGS. 8 and 9. This makes it possible to improve the durability of the printed matter.

In one embodiment, as shown in FIG. 8, the protective layer 21 may be provided on the entire surface of the receiving layer 14 and may have recesses formed therein.
In one embodiment, the protective layer 21 may be formed to correspond to a region on the receiving layer 14 in which the recess is formed, as shown in FIG. In this case, the thickness of the protective layer shall not be taken into consideration when measuring the depth of the recess.

In one embodiment, the protective layer contains a resin material. The resin material is not particularly limited as long as it has transparency. Examples of the resin material include (meth) acrylic resin, styrene resin, vinyl resin, polyolefin, polyester, polyamide, imide resin, cellulose resin, thermosetting resin and active photocurable resin. The protective layer may contain one or more resin materials.

In the present disclosure, the "thermosetting resin" means a resin in a state in which a thermosetting resin is heated and cured. The "active light curable resin" means a resin in a state in which the active light curable resin is irradiated with active light and cured.

In the present disclosure, the "active ray" means radiation that chemically acts on an active photocurable resin to promote polymerization, and specifically, visible light, ultraviolet rays, X-rays, electron beams, and the like. It means α-rays, β-rays, γ-rays, etc.

The content ratio of the resin material in the protective layer is preferably 50% by mass or more and 95% by mass or less from the viewpoint of scratch resistance and storage stability of the image.

The protective layer can contain the above additives.
The thickness of the protective layer is preferably 0.1 μm or more and 10 μm or less, and more preferably 0.5 μm or more and 5 μm or less. This makes it possible to further improve the scratch resistance and storage stability of the image.

[Manufacturing method of printed matter]
The method for manufacturing the printed matter of the present disclosure is as follows.
The process of preparing the thermal transfer image receiving sheet of the present disclosure and
The process of forming an image on the receiving layer of the thermal transfer image receiving sheet,
The process of forming recesses in the thermal transfer image receiving sheet and
including.

In one embodiment, the method for producing an imprint of the present disclosure further comprises the step of forming a protective layer on the receiving layer on which the image is formed.

(Process to prepare thermal transfer image receiving sheet)
The method for producing a printed matter of the present disclosure includes a step of preparing the thermal transfer image receiving sheet. Since the configuration and manufacturing method of the thermal transfer image receiving sheet have been described above, the description thereof is omitted here.

(Image formation process)
The method for producing an imprint of the present disclosure includes a step of forming an image on a receiving layer included in a thermal transfer image receiving sheet.

As an image forming method, for example, a sublimation type thermal transfer method in which a sublimation dye contained in a sublimation transfer type colored layer included in a thermal transfer sheet is transferred onto a receiving layer, and a melt transfer type colored layer provided in a thermal transfer sheet are placed on a receiving layer. Examples thereof include a melt-type thermal transfer method for transfer. Further, an image may be formed by combining these.

The area where the image is formed is not particularly limited. For example, an image may be formed in a region where a recess is formed to obtain a deep image, or an image may be formed in a region where a recess is not formed to give a stereoscopic effect to the image.

Hologram transfer or the like may be performed together. For example, by performing hologram transfer in the region where the recess of the thermal transfer image receiving sheet is not formed, a hologram image having a more three-dimensional effect can be formed, and the design of the obtained printed matter can be further improved.

(Recess forming process)
The method for producing a printed matter of the present disclosure includes a step of forming a recess in a thermal transfer image receiving sheet.

In one embodiment, a recess is formed in the thermal transfer image receiving sheet before image formation.
In one embodiment, a recess is formed with respect to the thermal transfer image receiving sheet during image formation. For example, after transferring a sublimation dye from a thermal transfer sheet to form a background image, a concave portion is formed in the region where the background image is formed, and further, a relatively convex region where no concave portion is formed. By performing hologram transfer from a thermal transfer sheet, a hologram image with a three-dimensional effect can be formed.

In one embodiment, a recess is formed in the thermal transfer image receiving sheet after the image is formed and before the protective layer is formed.
In one embodiment, a recess is formed in the thermal transfer image receiving sheet after the protective layer is formed.
In one embodiment, a recess is formed at the same time as the protective layer is formed. For example, in the region where the image is formed (image forming region), the protective layer is transferred under the heating condition where the concave portion is not formed, and in the region other than the image forming region, the protective layer is transferred under the high temperature condition where the concave portion is formed. By doing so, it is possible to obtain a printed matter having a concave portion other than the image forming region.

The method for forming the recess is illustrated below, but the method is not limited thereto.
In one embodiment, the recess can be formed by heating the thermal transfer image receiving sheet from the receiving layer side via a resin film such as a PET film.

It is preferable that a back surface layer is formed on the surface of the resin film on the side not in contact with the thermal transfer image receiving sheet.
In one embodiment, the back layer contains a resin material. Examples of the resin material include cellulose resin, styrene resin, vinyl resin, polyester, polyurethane, polyamide, polycarbonate, polyimide, polyamideimide, chlorinated polyolefin, silicone-modified polyurethane, fluorine-modified polyurethane and (meth) acrylic resin. The back layer may contain one or more resin materials.

In one embodiment, the back layer contains, as a resin material, a two-component curable resin that cures when used in combination with a curing agent such as an isocyanate compound. Examples of such a resin include polyvinyl acetals such as polyvinyl acetal and polyvinyl butyral.

In one embodiment, the back layer contains inorganic or organic particles.

The thickness of the back layer is preferably 0.1 μm or more and 5 μm or less, and more preferably 0.5 μm or more and 2 μm or less. This makes it possible to suppress sticking, wrinkles, and the like while maintaining the transferability of heat energy when the recess is formed.

For the back layer, for example, the above material is dispersed or dissolved in water or a suitable organic solvent to prepare a coating liquid, and the coating liquid is applied onto a resin film by the above-mentioned known coating means. It can be formed by forming a coating film and drying it.

It is preferable that a release layer is formed on the surface of the resin film on the side in contact with the thermal transfer image receiving sheet. As a result, fusion of the resin film and the thermal transfer image receiving sheet in the recess forming step can be suppressed.

In one embodiment, the release layer contains a resin material. Examples of the resin material include (meth) acrylic resin, polyurethane, acetal resin, polyamide, polyester, melamine resin, polyol resin, cellulose resin and silicone resin. The release layer can contain one or more resin materials.

In one embodiment, the release layer contains a release agent. Examples of the mold release agent include silicone oil, phosphoric acid ester-based plastic material, fluorine-based compound, wax, metal soap, and filler. The release layer may contain one or more release agents.

The thickness of the release layer is preferably 0.2 μm or more and 2.0 μm or less.

For the release layer, for example, the above-mentioned material is dispersed or dissolved in water or a suitable organic solvent to prepare a coating liquid, and the coating liquid is applied onto a resin film by the above-mentioned known coating means. It can be formed by forming a coating film and drying it.

In one embodiment, the thermal transfer image receiving sheet is heated from the receiving layer side via a thermal transfer sheet including a substrate and a sublimation transfer type coloring layer, a hologram transfer layer, a protective layer and the like provided on the substrate. As a result, a recess can be formed.

Specifically, the sublimation transfer type coloring layer, the hologram transfer layer, the protective layer, etc. provided in the thermal transfer sheet and the receiving layer provided in the thermal transfer image receiving sheet are overlapped so as to face each other, and the thermal transfer sheet is heated from the substrate side. , Sublimation dye, hologram transfer layer, protective layer and the like can be transferred at the same time, and recesses can be formed.

The heating for forming the recess may be performed in the region where the sublimation transfer type coloring layer, the hologram transfer layer or the protective layer provided in the thermal transfer sheet is formed, and these layers of the thermal transfer sheet are not provided. This may be done in an area where the substrate is exposed (blank area).

The mold release layer may be provided on the thermal transfer sheet, and recesses may be formed by heating in the mold release layer forming region. In the base material of the thermal transfer sheet, the back surface layer may be provided on the surface opposite to the sublimation transfer type coloring layer, the hologram transfer layer, the protective layer and the like.

In one embodiment, the thermal transfer sheet comprises a yellow, magenta and cyan sublimation transfer type colored layers, a protective layer, a blank area, and a hologram transfer layer in a surface-sequential manner.
In one embodiment, the thermal transfer sheet comprises a yellow, magenta and cyan sublimation transfer type colored layers, a protective layer, a release layer, and a hologram transfer layer in a surface-sequential manner.

In one embodiment, the recess can be formed by directly heating the receiving layer provided in the thermal transfer image receiving sheet with a heating element or the like without using a resin film, a thermal transfer sheet or the like.

(Protective layer forming process)
In one embodiment, the method for producing an imprint of the present disclosure further comprises the step of forming a protective layer on the receiving layer on which the image is formed. The protective layer can be formed by a conventionally known method, for example, by transferring the protective layer from a thermal transfer sheet. A film for forming a protective layer may be laminated on the receiving layer via an adhesive layer or the like.

The protective layer may be formed before the concave portion is formed, or may be formed after the concave portion is formed.
The region where the protective layer is formed is not particularly limited. The protective layer may be formed on the entire surface of the receiving layer or may be formed on a part of the receiving layer. For example, a recess may be formed in the image forming region, and a protective layer may be formed corresponding to the image forming region and the recess forming region.

The present disclosure relates to, for example, the following [1] to [10].
[1] A substrate, a hollow particle-containing layer, a porous layer, a transparent film, and a receiving layer are provided in this order in the thickness direction, and the thickness of the transparent film is 10 μm or more and 45 μm or less, and is received. A thermal transfer image receiving sheet having a layer surface roughness Ra of 0.90 μm or less.
[2] The thermal transfer image receiving sheet according to the above [1], wherein the thickness of the porous layer is 10 μm or more and 150 μm or less.
[3] The thermal transfer image receiving sheet according to the above [1] or [2], wherein the porosity of the porous layer is 10% or more and 60% or less.
[4] The thermal transfer image receiving sheet according to any one of the above [1] to [3], wherein the thickness of the hollow particle-containing layer is 10 μm or more and 190 μm or less.
[5] The thermal transfer image receiving sheet according to any one of the above [1] to [4], wherein the porosity of the hollow particle-containing layer is 10% or more and 80% or less.
[6] The thermal transfer image receiving sheet according to any one of [1] to [5] above, wherein the surface roughness Ra of the surface of the receiving layer is 0.10 μm or more and 0.80 μm or less.
[7] The thermal transfer image receiving sheet according to any one of [1] to [6] above, wherein the thickness of the transparent film is 20 μm or more and 40 μm or less.
[8] The thermal transfer image receiving sheet according to any one of the above [1] to [7], wherein the total thickness of the porous layer and the hollow particle-containing layer is 65 μm or more and 200 μm or less.
[9] The step of preparing the thermal transfer image receiving sheet according to any one of the above [1] to [8], the step of forming an image on the receiving layer provided in the thermal transfer receiving sheet, and the recess in the thermal transfer receiving sheet. A method of manufacturing a printed matter, including a step of forming the image.
[10] A printed matter produced by using the thermal transfer image receiving sheet according to any one of the above [1] to [8], which comprises a base material, a hollow particle-containing layer, a porous layer, and a transparent layer. A printed matter in which a film and a receiving layer on which an image is formed are provided in this order in the thickness direction, and recesses having a depth of 5 μm or more are formed.

Next, the thermal transfer image receiving sheet and the like of the present disclosure will be described in more detail with reference to examples, but the thermal transfer image receiving sheet and the like of the present disclosure are not limited to these examples. Hereinafter, for the materials for which the solid content is described, the blending amount (preparation amount) before the solid content conversion is shown.

Example 1
As a base material, a double-sided coated paper having a thickness of 200 μm was prepared.
A coating liquid 1 for a hollow particle-containing layer having the following composition was applied to one surface of the substrate and dried to form a hollow particle-containing layer (porosity 55%) having a thickness of 35 μm. An adhesive layer coating liquid having the following composition was applied onto the hollow particle-containing layer and dried to form an adhesive layer having a thickness of 3 μm. A porous PP film having a thickness of 50 μm (porosity 22%, density 0.7 g / cm ³ ) was laminated on the adhesive layer. In this way, a heat-sensitive recess forming layer made of a hollow particle-containing layer as the second heat-sensitive recess forming layer and a porous PP film as the first heat-sensitive recess forming layer was formed on the substrate.

An adhesive layer coating liquid having the following composition was applied onto the porous PP film and dried to form an adhesive layer having a thickness of 3 μm. A transparent stretched PP film (transparent OPP film) having a thickness of 15 μm was laminated on the adhesive layer.
A primer layer coating solution having the following composition was applied onto the transparent OPP film and dried to form a primer layer having a thickness of 1.5 μm. A coating solution for a receiving layer having the following composition was applied onto the primer layer and dried to form a receiving layer having a thickness of 4 μm.
In this way, a thermal transfer image receiving sheet was obtained.

<Coating liquid 1 for hollow particle-containing layer>
-Hollow particle dispersion (average particle diameter 3.2 μm) 120 parts by mass (manufactured by Matsumoto Yushi Pharmaceutical Co., Ltd., solid content 35% by mass)
140 parts by mass of modified styrene acrylic acid copolymer (manufactured by Nippon Zeon Co., Ltd., NIPOL® SX1707A, solid content 45% by mass)
・ Isopropyl alcohol (IPA) 70 parts by mass ・ Water 160 parts by mass

<Coating liquid for adhesive layer>
・ Acrylic resin 100 parts by mass (manufactured by Arakawa Paint Industry Co., Ltd., police main agent EM-560)
・ 10 parts by mass of hardener (Polystic hardener EM-545K, manufactured by Arakawa Paint Industry Co., Ltd.)

<Coating liquid for primer layer>
-Polyester 4.2 parts by mass (Nippon Synthetic Chem Industry Co., Ltd., Polyester (registered trademark) WR-905)
-Titanium oxide 8.4 parts by mass (manufactured by Sakai Chemical Industry Co., Ltd., TCA-888)
・ IPA 10 parts by mass ・ Water 30 parts by mass

<Coating liquid for receiving layer>
60 parts by mass of vinyl chloride-vinyl acetate copolymer (Solvine (registered trademark) C, manufactured by Nisshin Chemical Industry Co., Ltd.)
-Epoxy-modified silicone resin 1.2 parts by mass (manufactured by Shin-Etsu Chemical Co., Ltd., X-22-3000T)
-Methylstyryl-modified silicone resin 0.6 parts by mass (manufactured by Shin-Etsu Chemical Co., Ltd., X-24-510)
・ Methyl ethyl ketone 2.5 parts by mass ・ Toluene 2.5 parts by mass

Examples 2-9 and Comparative Examples 1-6
Shows at least one of the coating liquid for the hollow particle-containing layer, the thickness of the hollow particle-containing layer, the type and thickness of the porous PP film, and the type and thickness of the film laminated on the porous PP film. The procedure was carried out in the same manner as in Example 1 except that the changes were made as described in 1. In Comparative Example 2, the film was not laminated on the porous PP film.

<Coating liquid 2 for hollow particle-containing layer>
18 parts by mass of polyacrylonitrile-based hollow particles (talc-treated product) (MFL-81GTA manufactured by Matsumoto Yushi Pharmaceutical Co., Ltd., average particle diameter 20 μm, true specific gravity 0.23)
-Polyurethane (Nipporan (registered trademark) 5120 manufactured by Tosoh Corporation, solid content 30% by mass) 40 parts by mass-Ethyl acetate 71 parts by mass-IPA 71 parts by mass The porosity of the hollow particle-containing layer with a thickness of 20 μm was 66%. rice field.

The films used in the examples and comparative examples are described below.
Transparent OPP film: Toray Industries, Inc. Trefan (registered trademark), biaxially stretched PP film
Thickness 15 μm, 20 μm, 30 μm, 40 μm, 60 μm
Transparent PET film: Toray Industries, Inc. Lumirror (registered trademark), biaxially stretched PET film
Thickness 6 μm, 16 μm, 25 μm, 38 μm, 50 μm
Matte PET film: FE3001, manufactured by Futamura Chemical Co., Ltd., thickness 12 μm
Porous PP film: OPL-H manufactured by Futamura Chemical Co., Ltd.
Density 0.7 g / cm ³ , thickness 35 μm, 50 μm

The porosity of the porous PP film was calculated from the formula (1-the bulk specific density of the porous PP film / the specific gravity of PP) × 100. The porosity of the hollow particle-containing layer is determined by applying a pressure of 0.49 MPa at 150 ° C. for 10 seconds to the hollow particle-containing layer formed on the substrate using a heat sealer, and heating and pressurizing the hollow particle-containing layer. It was calculated from the formula of {1- (t2 / t1)} × 100, where t1 is the thickness of and t2 is the thickness after heating and pressurizing.

<< Evaluation of concave shape >>
A coating liquid for the back layer having the following composition is applied to one surface of a 4 μm-thick PET film (Lumilar (registered trademark) # 5A-F53 manufactured by Toray Industries, Inc.), dried, and then dried at 60 ° C. for 100 hours. Aging was performed to form a back layer with a thickness of 1 μm.
A part of the receiving layer included in the thermal transfer image receiving sheets obtained in the above Examples and Comparative Examples was obtained from the receiving layer side via the PET film provided with the back layer, using the following test printer, and 0.27 mJ /. The applied energy of the dot was applied and heated to form a recess (see FIG. 2). Here, the PET film provided with the back layer was arranged so that the PET film and the receiving layer were in contact with each other.
<Coating liquid for back layer>
-Polyvinyl butyral 1.8 parts by mass (Sekisui Chemical Co., Ltd., Eslek (registered trademark) BX-1)
5.5 parts by mass of polyisocyanate (DIC Corporation, Barnock (registered trademark) D750)
-Phosphoric acid ester-based surfactant 1.6 parts by mass (Daiichi Kogyo Seiyaku Co., Ltd., Plysurf (registered trademark) A208N)
-Talc 0.35 parts by mass (Nippon Talc Industry Co., Ltd., Micro Ace (registered trademark) P-3)
・ Toluene 18.5 parts by mass ・ Methyl ethyl ketone 18.5 parts by mass

(Test printer)
・ Thermal head: F3589 (manufactured by Toshiba Hokuto Electronics Corporation)
-Thermal head wire pressure: 292 N / m
-Average resistance value of heating element: 5015Ω
・ Printing voltage: 20V
-Main scanning direction resolution: 300 dpi (dot per inch)
-Secondary scanning direction resolution: 300 dpi
-Line cycle: 4.0 msec. / Line
-Printing start temperature: 35 ° C
-Pulse duty ratio: 85%
-Gradation value: 255/255 (maximum gradation)

The applied energy (mJ / dot) is the applied energy calculated by the following equation (1). The applied power [W] in the formula (1) can be calculated by the following formula (2).
Applied energy (mJ / dot) = W × L. S × P. D x gradation value ... (1)
W in the formula (1) means applied power, and L. S means one line period (msec./line), and P.I. D means pulse Duty.
Applied power (W / watt) = V ² / R ... (2)
V in the formula (2) means the applied voltage, and R means the resistance value of the heating means.

The depth h of the formed recess was measured from the obtained profile using a shape analysis laser microscope (manufactured by KEYENCE CORPORATION, VK-X150 / 160, objective lens 10x), and based on the following evaluation criteria, evaluated. The evaluation results are shown in Table 1.

(Evaluation criteria)
A: The depth h of the recess is 10 μm or more,
It was confirmed that a particularly good recess was formed.
B: The depth h of the recess is 5 μm or more and less than 10 μm.
It was confirmed that a good recess was formed.
NG: The depth h of the recess was less than 5 μm.

<< Surface Roughness Evaluation >>
The surface roughness Ra of the surface of the receiving layer in the heat transfer image receiving sheet obtained in the above Examples and Comparative Examples is measured by a laser microscope with a surface roughness measuring function in accordance with JIS B 0601 (manufactured by KEYENCE CORPORATION, trade name: VK). -Measured by X series). The measurement results are shown in Table 1.

<< Three-dimensional effect evaluation >>
The thermal transfer image receiving sheet obtained in the above Examples and Comparative Examples includes a sublimation type thermal transfer printer (manufactured by Dai Nippon Printing Co., Ltd., DS620) equipped with a thermal head, and the printer provided with a dye layer and a protective layer containing a sublimation dye. The image and the recess were formed using the genuine ribbon for the purpose, and the three-dimensional effect of the image was visually evaluated based on the following evaluation criteria.
A: The stereoscopic effect of the image was particularly good.
B: The stereoscopic effect of the image was good.
NG: The stereoscopic effect of the image was not sufficient.

10: Thermal transfer image receiving sheet 11: Base material 12: Thermal recess forming layer 12-1: Porous layer 12-2: Hollow particle-containing layer 13: Transparent film 14: Receptive layer 18: Laminated body portion 20: Imprint 21: Protection layer

Claims (10)

A substrate, a hollow particle-containing layer, a porous layer, a transparent film, and a receiving layer are provided in this order in the thickness direction.
The thickness of the transparent film is 10 μm or more and 45 μm or less.
The surface roughness Ra of the surface of the receiving layer is 0.90 μm or less.
Thermal transfer image receiving sheet. The thermal transfer image receiving sheet according to claim 1, wherein the thickness of the porous layer is 10 μm or more and 150 μm or less. The thermal transfer image receiving sheet according to claim 1 or 2, wherein the porosity of the porous layer is 10% or more and 60% or less. The thermal transfer image receiving sheet according to any one of claims 1 to 3, wherein the hollow particle-containing layer has a thickness of 10 μm or more and 190 μm or less. The thermal transfer image receiving sheet according to any one of claims 1 to 4, wherein the porosity of the hollow particle-containing layer is 10% or more and 80% or less. The thermal transfer image receiving sheet according to any one of claims 1 to 5, wherein the surface roughness Ra of the surface of the receiving layer is 0.10 μm or more and 0.80 μm or less. The thermal transfer image receiving sheet according to any one of claims 1 to 6, wherein the transparent film has a thickness of 20 μm or more and 40 μm or less. The thermal transfer image receiving sheet according to any one of claims 1 to 7, wherein the total thickness of the porous layer and the hollow particle-containing layer is 65 μm or more and 200 μm or less. The step of preparing the thermal transfer image receiving sheet according to any one of claims 1 to 8, and the step of preparing the thermal transfer image receiving sheet.
A step of forming an image on the receiving layer provided in the thermal transfer image receiving sheet, and
The step of forming a recess in the thermal transfer image receiving sheet and
A method for manufacturing a printed matter, including. A printed matter produced by using the thermal transfer image receiving sheet according to any one of claims 1 to 8.
The substrate, the hollow particle-containing layer, the porous layer, the transparent film, and the receiving layer on which an image is formed are provided in this order in the thickness direction.
A printed matter having a recess having a depth of 5 μm or more.

Images