JP2014065156A - Thermal transfer image receiving sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermal transfer image receiving sheet capable of preventing abnormal transfer or occurrence of wrinkles by enhancing releasability from a receiving layer, optimizing a frictional force between the receiving layer and reducing variation in the friction force.SOLUTION: There is provided a thermal transfer image receiving sheet 100 in which a receiving layer 2 is provided on one surface of a support 1, wherein the receiving layer 2 includes a binder resin and a release agent and further includes one or two or more kinds of elastic fillers selected from the group consisting of an urethane filler, a silicone filler, a polytetrafluoroethylene filler, a mixed filler of polytetrafluoroethylene and polyethylene and a polypropylene filler.

Description

  The present invention relates to a thermal transfer image receiving sheet.

  As a method of forming an image using thermal transfer, a thermal transfer sheet in which a sublimation dye as a recording material is supported on a substrate such as a plastic film and a receiving layer are provided on another substrate such as paper or a plastic film. A sublimation type thermal transfer system is known in which a thermal transfer image receiving sheet is superposed on each other to form a full color image. Since this method uses sublimation dyes as color materials, it is excellent in halftone reproducibility and gradation, and a full color image as it is on the original can be clearly displayed on the image receiving sheet. It is applied to color image formation for computers. The image is of a high quality comparable to a silver salt photograph.

  During image formation using the sublimation thermal transfer method, if the releasability between the dye layer of the thermal transfer sheet and the receiving layer of the thermal transfer image-receiving sheet is low, the dye layer of the thermal transfer sheet is attached to the receiving layer of the thermal transfer image-receiving sheet. Therefore, when the dye layer is peeled off from the receiving layer after image formation, problems such as peeling noise, running failure, and peeling lines may occur. In addition to this, there may be a problem of abnormal transfer in which the dye layer adheres to the receiving layer and is transferred as a layer. Therefore, good releasability is required between the dye layer of the thermal transfer sheet and the receiving layer of the thermal transfer image receiving sheet.

  In order to improve the releasability between the dye layer and the receiving layer, the receiving layer preferably contains various releasing agents. For example, Patent Document 1 discloses a receiving layer containing silicone oil. There has been proposed a thermal transfer image-receiving sheet comprising: In addition, a thermal transfer image receiving sheet in which a solid release agent having a relatively low melting point is contained in a receiving layer is also known.

  By the way, when a release agent such as silicone oil is included in the receiving layer, the releasability is improved, but the frictional force between the dye layer and the receiving layer during image formation is reduced, and the surface of the receiving layer is reduced. The dye layer becomes slippery. In other words, the receiving layer and the dye layer cannot be sufficiently gripped during image formation. When image formation is performed in such a state, wrinkles are generated in the dye layer, which causes generation of print wrinkles.

  Also, the primary color, secondary color, tertiary color, and dyes of each color are sequentially transferred, and an image of a low gradation portion, for example, an image corresponding to the primary color, and a dark gradation portion are displayed on one screen. When forming an image, for example, an image corresponding to a tertiary color, if there is a large difference in frictional force when transferring primary and tertiary dyes, a slippery part in one screen Then, there is a portion that is difficult to slip, and printing wrinkles due to a difference in frictional force are likely to occur.

  In view of the above, the receiving layer of the thermal transfer image-receiving sheet has high releasability, suppresses a decrease in frictional force with the dye layer, and sequentially transfers the dyes of each color. It is required to reduce the fluctuation of the frictional force at the time.

JP 2007-90650 A

  The present invention has been made in such a situation, and has high releasability from the dye layer of the thermal transfer sheet, and sequentially transfers the dyes of the respective colors while optimizing the frictional force between the dye layers. The main object is to provide a thermal transfer image-receiving sheet that can suppress the fluctuation of the frictional force at the time.

  The present invention for solving the above problems is a thermal transfer image-receiving sheet provided with a receiving layer on one side of a support, wherein the receiving layer includes a binder resin and a release agent, and the receiving layer Further includes one or more elastic fillers selected from the group consisting of urethane fillers, silicone fillers, polytetrafluoroethylene fillers, mixed fillers of polytetrafluoroethylene and polyethylene, and polypropylene fillers. Features.

  The receiving layer may include the elastic filler in a range of 0.05% by mass to 0.8% by mass with respect to the total solid content of the binder resin.

  According to the thermal transfer image-receiving sheet of the present invention, when the color dyes are sequentially transferred while the releasability from the dye layer of the thermal transfer sheet is high and the frictional force with the dye layer is optimized. Since fluctuations in the frictional force can be suppressed, it is possible to prevent abnormal transfer and printing wrinkles during image formation.

It is a schematic sectional drawing which shows an example of the thermal transfer image receiving sheet of this invention. It is a schematic sectional drawing which shows an example of the thermal transfer image receiving sheet of this invention.

  The thermal transfer image receiving sheet of the present invention will be described in detail below. As shown in FIGS. 1 and 2, the thermal transfer image receiving sheet 100 of the present invention has a configuration in which a receiving layer 2 is provided on one surface of a support 1. And in this invention, the receiving layer 2 is selected from the group of binder resin, mold release agent, urethane filler, silicone filler, polytetrafluoroethylene filler, mixed filler of polytetrafluoroethylene and polyethylene, and polypropylene filler. It is characterized in that it contains one or more elastic fillers. Hereinafter, each structure of the thermal transfer image receiving sheet 100 of this invention is demonstrated concretely.

(Support)
The support 1 is not particularly limited as long as it can support the receiving layer 2 and the back layer 8 having an arbitrary configuration. For example, as shown in FIG. 1, the support 1 may have a laminated structure in which a base material 11, an adhesive layer 12, and a film 13 are laminated in this order. As shown in FIG. The adhesive layer 12, the base material 11, the adhesive layer 12, and the film 13 may have a laminated structure in which they are laminated in this order. Further, it may have a single layer structure. Examples of the support 1 having a single layer structure include a support 1 made of a substrate 11 and a support 1 made of a film 13.

"Base material"
As the base material 11, high-quality paper, coated paper, resin-coated paper, art paper, cast-coated paper, paperboard, synthetic paper (polyolefin type, polystyrene type), synthetic resin or emulsion-impregnated paper, synthetic rubber latex-impregnated paper, synthetic resin Examples thereof include internal paper and cellulose fiber paper. There is no limitation in particular about the thickness of the base material 11, and it is about 10 micrometers-about 300 micrometers normally. Particularly preferred is a thickness of 110 μm to 140 μm. Moreover, in this invention, a commercially available base material can also be used, for example, RC paper paper (Mitsubishi Paper Co., Ltd. make, brand name: STF-150), Coated paper (Nippon Paper Industries Co., Ltd. make, brand name) : Aurora coat) and the like can be suitably used.

"the film"
As the film 13, stretched or unstretched films of plastics such as polyolefin, polyester, polypropylene, polycarbonate, cellulose acetate, polyethylene derivatives, polyamide, polymethylpentene and the like having high heat resistance such as polyethylene terephthalate and polyethylene naphthalate, and their synthesis Examples thereof include a white opaque film formed by adding a white pigment or a filler to a resin, and a film having a microvoid inside.

  In the case where the support 1 has the configuration shown in FIGS. 1 and 2, the film 13 laminated on the receiving layer 2 side is preferably a film having voids. As a film having voids, voids (fine pores) can be generated by the following two methods. One is a method in which inorganic fine particles are kneaded in a polymer, and when the compound is stretched, microvoids are generated using the inorganic fine particles as nuclei. The other is to create a compound blended with an incompatible polymer (one or more types) for the main resin. When this compound is viewed microscopically, the polymers form a fine sea-island structure. When this compound is stretched, microvoids are generated due to separation of the sea-island interface or large deformation of the polymer forming the island. The thickness of the film having microvoids is usually about 10 μm to 100 μm, preferably 20 μm to 50 μm.

"Adhesive layer"
An adhesive layer 12 is preferably provided between the substrate 11 and the film 13. The adhesive layer for adhering the base material 11 and the film 13 together includes an adhesive and has an adhesive function. Examples of the adhesive component include urethane resins, polyolefin resins such as α-olefin-maleic anhydride resins, polyester resins, acrylic resins, epoxy resins, urea resins, melamine resins, phenol resins, Examples thereof include vinyl acetate resins and cyanoacrylate resins. Among them, a reactive type of acrylic resin, a modified type, etc. can be preferably used. Further, it is preferable to cure the adhesive using a curing agent because the adhesive force is improved and the heat resistance is also increased. As the curing agent, an isocyanate compound is generally used, but aliphatic amines, cycloaliphatic amines, aromatic amines, acid anhydrides and the like can be used.

The thickness of the adhesive layer 12 is typically, ² to 10 g / m ² about 2 g / m in the dry state. For the formation of the adhesive layer, generally used coating means can be used, for example, by means of gravure printing, screen printing, reverse roll coating using a gravure plate, etc., It can be obtained by drying.

(Receptive layer)
A receiving layer 2 is provided on the support 1. The receiving layer 2 is an essential component in the thermal transfer image receiving sheet 100 used in the present invention. In the present invention, the receiving layer 2 contains a binder resin, a release agent, and an elastic filler.

"Binder resin"
As the binder resin contained in the receiving layer 2, a conventionally known resin material that can easily receive the dye of the dye layer of the thermal transfer sheet can be used. For example, polyolefin resin such as polypropylene, halogenated resin such as polyvinyl chloride or polyvinylidene chloride, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, ethylene-vinyl acetate copolymer or polyacrylate Vinyl resins, polyester resins such as polyethylene terephthalate or polybutylene terephthalate, polystyrene resins, polyamide resins, copolymers of olefins such as ethylene or propylene and other vinyl polymers, cellulose resins such as ionomers or cellulose diastases And solvent-based resins such as polycarbonate and acrylic resins.

  In addition to this, a resin such as a water-soluble resin, a water-soluble polymer, and a water-based resin can be used as the binder resin. By including these resins in the receiving layer 2, it is possible to impart high gloss to an image formed using the thermal transfer image receiving sheet 100 of the present invention. Examples of water-soluble resins and water-soluble polymers include polyvinyl pyrrolidone resins, polyvinyl alcohol resins, and gelatin. Examples of the water-based resin include emulsions such as a vinyl chloride resin, an acrylic resin, and a urethane resin, or a solvent in which a part of a solvent such as a dispersion is composed of water. The aqueous resin can be formed, for example, by dispersing and preparing a solution containing a solvent-based resin by a method such as a homogenizer.

  The various binder resins described above are preferably contained in the range of 50% by mass to 95% by mass with respect to the total solid content of the receiving layer 2. In particular, when the content of the water-soluble resin, water-soluble polymer, or water-based resin is within the above range, a high glossiness can be imparted to the formed image. The same applies to the case of using other binder resins.

"Release agent"
The receptive layer 2 contains a release agent for improving releasability from the dye layer of the thermal transfer sheet together with the binder resin. With this configuration, sticking between the dye layer of the thermal transfer sheet and the receiving layer of the thermal transfer image receiving sheet can be prevented during image formation, and abnormal transfer or the like can be prevented.

  There are no particular limitations on the release agent, and conventionally known release agents can be appropriately selected and used in the field of thermal transfer image-receiving sheets. Examples thereof include silicone oil, polyethylene wax, amide wax, fluorine-based and phosphate-based surfactants. Various modified silicones can also be used as the silicone oil. Modified silicone oils are divided into reactive silicone oils and non-reactive silicone oils. Examples of reactive silicone oils include amino-modified, epoxy-modified, carboxyl-modified, carbinol-modified, methacryl-modified, mercapto-modified, phenol-modified, and one piece. Examples thereof include terminal reactivity and modification with different functional groups. Examples of the non-reactive silicone oil include polyether modification, methylstyryl modification, alkyl modification, higher fatty acid ester modification, hydrophilic special modification, higher alkoxy modification, higher fatty acid modification, and fluorine modification. These various modified silicones may be used alone or in combination of two or more. Moreover, silicone oil and other mold release agents can be used in combination.

  Among the release agents exemplified above, a liquid release agent or a solid release agent having a relatively low melting point, for example, a solid release agent having a melting point of 100 ° C. or lower is used for the dye layer with the thermal transfer sheet. It can be preferably used in terms of high releasability.

  The content of the release agent is not particularly limited, but when the content of the release agent is less than 1% by mass with respect to the total solid content of the receiving layer, the release of the dye layer and the receiving layer 2 is performed. On the other hand, if it exceeds 10% by mass, the print sensitivity may be lowered when a printed product is formed using the thermal transfer image-receiving sheet of the present invention. On the other hand, when the content exceeds 10% by mass, the transfer sensitivity when the protective layer of the protective layer transfer sheet is transferred onto the receiving layer 2 of the thermal transfer image receiving sheet of the present invention tends to decrease, and the protective layer is received with low energy. There may be cases where transfer onto the layer 2 becomes impossible. Therefore, considering this point, it is preferable that the release agent is contained within a range of 1% by mass or more and 10% by mass or less with respect to the total solid content of the receiving layer 2.

"Elastic filler"
In the present invention, as described above, by incorporating a release agent in the receiving layer 2, high release properties are imparted between the dye layer of the thermal transfer sheet and the receiving layer, while the dye layer The frictional force between the and the receiving layer is reduced. When the frictional force is small, the thermal transfer sheet and the receiving layer cannot be gripped sufficiently during image formation, and the dye layer of the thermal transfer sheet is wrinkled. Then, due to wrinkles generated in the dye layer, print wrinkles occur in the obtained image.

  Therefore, in the present invention, the receiving layer 2 is selected from the group of urethane filler, silicone filler, polytetrafluoroethylene filler, mixed filler of polytetrafluoroethylene and polyethylene, and polypropylene filler together with the binder resin and the release agent. 1 type or 2 types or more of elastic fillers are contained. Hereinafter, urethane fillers, silicone fillers, polytetrafluoroethylene fillers, mixed fillers of polytetrafluoroethylene and polyethylene, and one or more elastic fillers selected from the group of polypropylene fillers are collectively referred to simply as elastic fillers. There is a case. In addition, the filler said in this specification means organic fine particles. For example, the silicone oil exemplified as the release agent and the silicone filler which is one of the elastic fillers can be clearly distinguished from each other in that the property is divided into a liquid and a solid.

  Examples of the urethane filler that is one of the elastic fillers include urethane resin fine particles. The urethane resin fine particles may have a crosslinked structure. Examples of the silicone filler that is one of the elastic fillers include silicone rubber and a silicone rubber whose surface is covered with a silicone resin. In addition, silicone resin fine particles and the like can be used. Some of the silicone resin fine particles have almost no elasticity. When the silicone resin fine particles having little elasticity are contained in the receiving layer 2, the frictional force between the receiving layer and the dye layer is increased. In some cases, the surface of the printed material obtained by forming an image on the receiving layer may be rough. For example, Tospearl 2000B manufactured by Momentive Performance Materials, which is a commercially available silicone resin fine particle, has low elasticity, and it is difficult to increase frictional force and prevent occurrence of roughness. Therefore, when silicone resin fine particles are used as the elastic filler, the receiving layer 2 contains silicone resin fine particles having a certain degree of elasticity, for example, silicone resin fine particles having higher elasticity than the commercially available silicone resin fine particles described here. It is necessary to make it.

  According to the present invention in which the receiving layer 2 includes an elastic filler selected from the above group, due to the presence of the elastic filler, the frictional force between the dye layer of the thermal transfer sheet and the receiving layer 2 of the thermal transfer image receiving sheet of the present invention is increased. Can be high. As a result, the grip between the dye layer and the receiving layer 2 during image formation can be enhanced, wrinkles that can occur in the dye layer can be prevented, and the occurrence of print wrinkles can be prevented. That is, according to the receiving layer 2 including the elastic filler together with the release agent, the frictional force between the dye layer and the receiving layer 2 is sufficiently large while sufficiently satisfying the releasing property between the dye layer and the receiving layer 2. can do.

  The elastic filler contained in the receiving layer 2 is a fine particle and is fixed in the receiving layer 2 by the binder resin contained in the receiving layer 2, so that it is not taken to the dye layer side during image formation. That is, the absolute amount of the elastic filler contained in the receiving layer 2 does not vary during image formation. Thus, the difference in frictional force between the dye layer and the receiving layer when the primary color, the secondary color, the tertiary color, and the dyes included in different dye layers are sequentially transferred to the receiving layer. Can be reduced. In other words, the fluctuation of the frictional force between the dye layer and the receiving layer can be reduced, and the frictional force can be maintained in a stable state.

  Specifically, in the case where an image of a low gradation part, for example, an image corresponding to a primary color and an image of a dark gradation part, for example, an image corresponding to a tertiary color are formed in one screen. If the difference in frictional force when transferring primary and tertiary dyes is large, there will be a slippery part and a non-slippable part in one screen. Print wrinkles due to the image are likely to occur. In the present invention, as described above, since the fluctuation of the difference in frictional force is suppressed by the presence of the elastic filler, an image of a low gradation portion and an image of a dark gradation portion are formed in one screen. Even in this case, generation of print wrinkles can be prevented.

  In general, when a release agent having a high frictional force is used, the releasability tends to decrease. When a release agent having a high release property is used, the frictional force can be increased. Can not. In addition, using a liquid release agent that does not easily reduce the frictional force between the dye layer and the receiving layer, or a solid release agent with a relatively low melting point, while ensuring a certain release property, Although attempts have been made to suppress the decrease, the liquid release agent is taken to the dye layer side when the secondary color and the tertiary color are sequentially printed, and the liquid release agent contained in the receiving layer is released. The absolute amount of the agent decreases each time printing is repeated. Therefore, the liquid release agent cannot suppress the fluctuation of the frictional force when the dyes of the respective colors are sequentially transferred. In addition, since a solid release agent exhibits better release properties than printing under conditions above the melting point, the solid release agent is usually present in the receiving layer in a liquid state during printing. doing. Therefore, as with the liquid release agent, when the secondary color and tertiary color are printed in sequence, the solid release agent is also taken to the dye layer side to suppress the fluctuation of the frictional force. I can't.

  In other words, in the present invention, "the role of improving the releasability between the dye layer and the receiving layer", "the role of increasing the frictional force between the dye layer and the receiving layer", "when dyes of each color are transferred The role of suppressing the fluctuation of the frictional force of the ink is separated, the release agent described above improves the releasability between the dye layer and the receiving layer 2, and the elastic filler causes the friction between the dye layer and the receiving layer 2. It is characterized in that fluctuation in frictional force when printing with primary color, secondary color, and tertiary color is suppressed while increasing the force.

  When an inorganic filler is contained in the receiving layer instead of the elastic filler, a “white spot” phenomenon occurs in the image formed on the receiving layer containing the inorganic filler, and the surface of the printed material is roughened. There is. “White blank” means that when a printed product is produced using a thermal transfer image receiving sheet, a region that is not partially printed occurs in the region to be printed on the thermal transfer image receiving sheet.

  There is no particular limitation on the content of the elastic filler, but when the content of the elastic filler is less than 0.05% by mass relative to the total solid content of the binder resin, the dye layer There may be a case where the frictional force with the receiving layer 2 cannot be sufficiently increased. On the other hand, when it exceeds 0.8% by mass, “white spots” tend to occur. Therefore, considering this point, the elastic filler is preferably in the range of 0.05% by mass or more and 0.8% by mass or less with respect to the total solid content of the binder resin.

  The particle diameter of the elastic filler is also not particularly limited, and a particle having a particle diameter that allows a part of the surface of the elastic filler to protrude from the surface of the receiving layer 2 may be appropriately selected and used. When the average particle diameter of the elastic filler exceeds 15 μm, depending on the thickness of the receiving layer 2, there is a possibility that the elastic filler may fall off from the receiving layer. On the other hand, when the thickness is less than 1 μm, depending on the thickness of the receiving layer, the elastic filler cannot be sufficiently protruded from the surface of the receiving layer 2 and the effect of increasing the frictional force between the dye layer and the receiving layer 2 is reduced. Tend to. Therefore, considering this point, the particle diameter of the elastic filler is preferably in the range of 1 μm or more and 15 μm or less in terms of average particle diameter. The average particle diameter of the elastic filler is an average particle diameter measured by a particle size distribution measuring apparatus using a laser diffraction scattering method, and is a volume average particle diameter calculated based on a volume standard. As the particle size distribution measuring device, for example, Coulter LS230 manufactured by Beckman Coulter Co., Ltd., MT3000II series manufactured by Nikkiso Co., Ltd., or the like can be used.

  There is no particular limitation on the shape of the elastic filler, and any shape that allows a part of the surface of the elastic filler to protrude from the surface of the receiving layer 2 as described above may be used. For example, an indefinite shape such as a spherical shape or a polygonal shape, a scale shape, and the like can be given. Among them, when the elastic filler having a spherical shape or a shape close to this is contained in the receiving layer 2, it is preferable in that a part of the surface of the elastic filler can be easily protruded from the surface of the receiving layer 2.

  The thickness of the receiving layer is not particularly limited, and can be appropriately set according to the type of the binder resin, the particle diameter of the elastic filler, and the like. A preferable range is about 1 μm to 10 μm.

  In addition, the receiving layer 2 may contain an inorganic filler or an organic filler other than the elastic filler as long as the gist of the present invention is not hindered. In this case, depending on the content, “print wrinkles”, “white spots”, etc. may occur, so it is necessary to add them in a range in which “print wrinkles” and “white spots” do not occur.

  The method for forming the receiving layer 2 is not particularly limited, and the binder resin, release agent, elastic filler, and various additives added as necessary are dissolved in an appropriate solvent such as water or a solvent. Alternatively, a coating solution for the receiving layer is prepared by dispersing, and this is applied onto the support 1 or any layer by means of a gravure printing method, a screen printing method or a reverse coating method using a gravure plate, and dried. Can be formed.

(Primer layer)
As shown in FIGS. 1 and 2, a primer layer 6 may be provided between the support 1 and the receiving layer 2. By providing the primer layer 6, the adhesion between the support 1 and the receiving layer 2 can be improved. Examples of the binder resin contained in the primer layer 6 include a polyurethane resin, an acrylic resin, a polyethylene resin, a polypropylene resin, and an epoxy resin. The primer layer 6 may be a water-dispersed primer layer or a solvent-dispersed primer layer. The thickness of the primer layer 6 is preferably about 0.1 to 20 g / m ² when dried in terms of coating amount.

(Back layer)
As shown in FIGS. 1 and 2, a back surface layer 8 may be provided on the surface of the substrate 1 opposite to the side on which the receiving layer 2 is provided. The back layer 8 has an arbitrary configuration in the thermal transfer image receiving sheet 100 of the present invention.

As the back surface layer 8, a material having a desired function can be appropriately selected and used depending on the application of the thermal transfer image receiving sheet of the present invention. Among them, it is preferable to use the back layer 8 having a function of improving the transferability of the thermal transfer image receiving sheet and a function of preventing curling. Examples of the back layer 8 having such a function include acrylic resins, cellulose resins, polycarbonate resins, polyvinyl acetal resins, polyvinyl alcohol resins, polyvinyl butyral resins, polyamide resins, polystyrene resins, polyester resins, halogenated polymers, and the like. As additives, nylon fillers, acrylic fillers, polyamide fillers, fluorine fillers, polyethylene waxes, organic fillers such as amino acid powders, and inorganic fillers such as silicon dioxide and metal oxides were added as additives. Things can be used. Moreover, what hardened these resin with hardening | curing agents, such as an isocyanate compound and a chelate compound, can also be used as a back surface layer. The thickness of the back layer 8, at a coat weight, dried at 0.1g / m ² ~20g / m ² approximately, and ^{preferably, 0.5g / m 2 ~10g / m} 2 approximately.

  The thermal transfer image-receiving sheet of the present invention has been specifically described above, but the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. Can take. For example, the thermal transfer image receiving sheet 100 may have various functional layers, for example, a barrier layer (not shown) for imparting solvent resistance. Further, the back layer 8 may not be provided.

  Hereinafter, the present invention will be described with reference to examples and comparative examples. “Part” in the text is based on mass unless otherwise specified.

Example 1
35 μm porous polypropylene film (manufactured by Toyopearl SS Toyobo Co., Ltd.) on one side of coated paper (Pearl coat N: 157.0 g / m ^2, manufactured by Mitsubishi Paper Industries Co., Ltd.), and the other of the coated paper 50 μm of white polyethylene terephthalate (Lumirror E63S manufactured by Toray Industries, Inc.) was pasted onto the surface of the film using an adhesive layer coating solution having the following composition (coating amount: 4 g / m ² (after drying)). A support was made. Next, on the surface of the porous polypropylene film of the support, a primer layer coating liquid having the following composition was applied by a bar coater so that the coating amount on drying was 2.0 g / m ² and dried (130 ° C., 1 minute) to form a primer layer. Next, on the primer layer, the receiving layer coating solution 1 having the following composition was coated and dried (130 ° C., 1 minute) by a bar coater so that the coating amount during drying was 3.0 g / m ^2. A receiving layer was formed. Further, on the surface opposite to the surface on which the receiving layer of the support is provided, a coating solution for the back surface layer having the following composition is applied to a coating amount of 2.0 g / m ² (after drying) using a bar coater. The thermal transfer image-receiving sheet of Example 1 was obtained by forming a back surface layer by coating and drying (110 ° C., 1 minute).

<Coating liquid for adhesive layer>
・ 30 parts of urethane resin (Takelac A-969V, manufactured by Mitsui Takeda Chemical Co., Ltd.)
・ Isocyanate 10 parts (Takenate A-5 manufactured by Mitsui Takeda Chemical Co., Ltd.)
・ 60 parts of ethyl acetate

<Primer layer coating solution>
・ Polyester resin 50 parts (Polyester WR-905 manufactured by Nippon Synthetic Chemical Industry Co., Ltd.)
・ Titanium oxide 20 parts (TCA888 manufactured by Tochem Products Co., Ltd.)
・ Fluorescent whitening agent 1.2 parts (Ubitex BAC Ciba Specialty Chemicals Co., Ltd.)
Water / isopropyl alcohol = 1/1 28.8 parts

<Receptive layer coating solution 1>
・ Vinyl chloride-vinyl acetate copolymer 20 parts (Solvine CN Nissin Chemical Industry Co., Ltd.)
・ Side chain type / epoxy aralkyl modified silicone oil 1 part (X-22-3000T Shin-Etsu Chemical Co., Ltd.)
・ Both-end type / Carbinol-modified silicone oil 0.2 parts (X-22-160AS Shin-Etsu Chemical Co., Ltd.)
・ Urethane filler (average particle size: 6 μm) 0.06 parts (Art Pearl C-800 Negami Industrial Co., Ltd.)
・ Toluene 80 parts ・ Methyl ethyl ketone 80 parts

<Coating liquid for back layer>
・ 10 parts of polyvinyl butyral resin (# 3000-1 manufactured by Denki Kagaku Kogyo Co., Ltd.)
Chelating agent 4.3 parts (Tencalate TP110)
・ Nylon 12 filler 2 parts (NW330 manufactured by Shinto Paint Co., Ltd.)
-Toluene / isopropyl alcohol 83.7 parts

(Example 2)
In place of the receiving layer coating solution 1, except that the dye layer coating solution 2 in which only the amount of the urethane filler added to the receiving layer coating solution 1 was changed from 0.06 parts to 0.2 parts was used. Were the same as in Example 1 to obtain the thermal transfer image-receiving sheet of Example 2.

(Example 3)
In place of the receiving layer coating solution 1, except that the dye layer coating solution 3 was used in which only the amount of the urethane filler added to the receiving layer coating solution 1 was changed from 0.06 parts to 0.16 parts. Were the same as in Example 1 to obtain the thermal transfer image-receiving sheet of Example 3.

Example 4
In place of the receiving layer coating solution 1, except that the dye layer coating solution 4 in which only the addition amount of the urethane filler in the receiving layer coating solution 1 was changed from 0.06 parts to 0.01 parts was used. Were the same as in Example 1 to obtain the thermal transfer image-receiving sheet of Example 4.

(Example 5)
In place of the receiving layer coating solution 1, except that the dye layer coating solution 5 was used in which only the amount of the urethane filler added to the receiving layer coating solution 1 was changed from 0.06 parts to 0.006 parts. Were the same as in Example 1 to obtain the thermal transfer image-receiving sheet of Example 5.

(Example 6)
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) (Art Pearl C-800 Negami Industrial Co., Ltd.) of the receiving layer coating solution 1 was used as the urethane filler (average particle size: 6 μm) (Art Pearl P-800T Negami Kogyo Co., Ltd.) A thermal transfer image-receiving sheet of Example 6 was obtained in the same manner as Example 1 except that the coating solution 6 for receiving layer was changed to 0.06 part. It was.

(Example 7)
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) (Art Pearl C-800 Negami Industrial Co., Ltd.) of the receiving layer coating solution 1 was used as the urethane filler (average particle size: 6 μm) (Art Pearl JB-800T Negami Kogyo Co., Ltd.) A thermal transfer image-receiving sheet of Example 7 was obtained in the same manner as in Example 1 except that the receiving layer coating solution 7 was changed to 0.06 part. It was.

(Example 8)
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) (Art Pearl C-800 Negami Industrial Co., Ltd.) of the receiving layer coating solution 1 was used as a silicone rubber (average particle size: 2 μm) (Trefill E-606 Toray Dow Corning Co., Ltd.) The thermal transfer image-receiving sheet of Example 8 was the same as Example 1 except that the receiving layer coating solution 8 was changed to 0.06 part. Obtained.

Example 9
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) (Art Pearl C-800 Negami Industrial Co., Ltd.) of the receiving layer coating solution 1 was used as a silicone rubber (average particle size: 3 μm) (Telefil EP-2600 Toray Dow Corning Co., Ltd.) The thermal transfer image-receiving sheet of Example 9 was the same as Example 1 except that the receiving layer coating solution 9 was changed to 0.06 part. Obtained.

(Example 10)
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) (Art Pearl C-800 Negami Industrial Co., Ltd.) of the receiving layer coating solution 1 was used as a silicone rubber (average particle size: 5 μm) (KMP597 Shin-Etsu Chemical Co., Ltd.) A thermal transfer image-receiving sheet of Example 10 was obtained in the same manner as in Example 1 except that the receiving layer coating solution 10 was changed to 0.06 part.

(Example 11)
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) (Art Pearl C-800 Negami Industrial Co., Ltd.) of the receiving layer coating solution 1 was used as a silicone rubber (average particle size: 5 μm) (KMP594 Shin-Etsu Chemical Co., Ltd.) A thermal transfer image-receiving sheet of Example 11 was obtained in the same manner as in Example 1 except that the receiving layer coating solution 11 was changed to 0.06 part.

(Example 12)
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) (Art Pearl C-800 Negami Industrial Co., Ltd.) of the receiving layer coating solution 1 was used as a silicone rubber (average particle size: 13 μm) (KMP598 Shin-Etsu Chemical Co., Ltd.) A thermal transfer image-receiving sheet of Example 12 was obtained in the same manner as in Example 1 except that the receiving layer coating solution 12 was changed to 0.06 part.

(Example 13)
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) (Art Pearl C-800 Negami Industrial Co., Ltd.) of the receiving layer coating solution 1 was used as a silicone composite powder (average particle size). : 5 μm) (KMP600 Shin-Etsu Chemical Co., Ltd.) A thermal transfer image-receiving sheet of Example 13 was obtained in the same manner as in Example 1 except that the receiving layer coating solution 13 was changed to 0.06 part.

(Example 14)
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) (Art Pearl C-800 Negami Industrial Co., Ltd.) of the receiving layer coating solution 1 was used as a silicone composite powder (average particle size). : 2 μm) (KMP605 Shin-Etsu Chemical Co., Ltd.) A thermal transfer image-receiving sheet of Example 14 was obtained in the same manner as in Example 1 except that the receiving layer coating solution 14 changed to 0.06 part was used.

(Example 15)
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) (Art Pearl C-800 Negami Industrial Co., Ltd.) of the receiving layer coating solution 1 was used as a silicone composite powder (average particle size). : 12 μm) (KMP601 Shin-Etsu Chemical Co., Ltd.) A thermal transfer image-receiving sheet of Example 15 was obtained in the same manner as in Example 1 except that the coating solution 15 for receiving layer was changed to 0.06 part.

(Example 16)
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) (Art Pearl C-800 Negami Industrial Co., Ltd.) of the receiving layer coating solution 1 was used as the PTFE filler (average particle size: 5 μm) (Lublon L-5 Daikin Industries, Ltd.) A thermal transfer image-receiving sheet of Example 16 was obtained in the same manner as in Example 1 except that the receiving layer coating solution 16 was changed to 0.06 part. .

(Example 17)
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) (Art Pearl C-800 Negami Industrial Co., Ltd.) of the receiving layer coating solution 1 was used as the PTFE filler (average particle size: 3 μm) (Lublon L-2 Daikin Industries, Ltd.) A thermal transfer image-receiving sheet of Example 17 was obtained in the same manner as in Example 1 except that the receiving layer coating solution 17 was changed to 0.06 part. .

(Example 18)
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) (Art Pearl C-800 Negami Industrial Co., Ltd.) of the receiving layer coating solution 1 was used as the PTFE filler (average particle size: 7 μm) (Fullon L173J Asahi Glass Co., Ltd.) A thermal transfer image-receiving sheet of Example 18 was obtained in the same manner as in Example 1 except that the receiving layer coating solution 18 was changed to 0.06 part.

(Example 19)
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) (Art Pearl C-800 Negami Industrial Co., Ltd.) of the receiving layer coating solution 1 was used as the PTFE filler (average particle size: 2 to 4 μm) (SST-4MG Shamrock Technologies) A thermal transfer image-receiving sheet of Example 19 was obtained in the same manner as in Example 1 except that the receiving layer coating solution 19 was changed to 0.06 part.

(Example 20)
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) of the receiving layer coating solution 1 (Art Pearl C-800 Negami Industrial Co., Ltd.) was replaced with PTFE / PE filler (average particle size). (Diameter: 6 μm) (FLORO SLIP 511 Shamrock Technologies) A thermal transfer image-receiving sheet of Example 20 was obtained in the same manner as in Example 1 except that the receiving layer coating solution 20 was changed to 0.06 part.

(Example 21)
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) of the receiving layer coating solution 1 (Art Pearl C-800 Negami Industrial Co., Ltd.) was replaced with PTFE / PE filler (average particle size). (Diameter: 6 μm) (FLORO SLIP 421T Shamrock Technologies Inc.) A thermal transfer image-receiving sheet of Example 21 was obtained in the same manner as Example 1 except that the receiving layer coating solution 21 was changed to 0.06 part.

(Example 22)
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) (Art Pearl C-800 Negami Industrial Co., Ltd.) of the receiving layer coating solution 1 was used as a polypropylene wax (average particle size: 5 μm) (PPW-5 Seisin Co., Ltd.) A thermal transfer image-receiving sheet of Example 22 was obtained in the same manner as in Example 1 except that the receiving layer coating liquid 22 changed to 0.06 parts was used.

  A thermal transfer image-receiving sheet of Comparative Example 1 was obtained in the same manner as in Example 1 except that the receiving layer coating solution A having the following composition was used instead of the receiving layer coating solution 1.

<Coating liquid A for receiving layer>
・ Vinyl chloride-vinyl acetate copolymer 20 parts (Solvine CN Nissin Chemical Industry Co., Ltd.)
・ Toluene 80 parts ・ Methyl ethyl ketone 80 parts

(Comparative Example 2)
A thermal transfer image receiving sheet of Comparative Example 2 was obtained in the same manner as in Example 1 except that the receiving layer coating liquid B having the following composition was used instead of the receiving layer coating liquid 1.

<Coating fluid B for receiving layer>
・ Vinyl chloride-vinyl acetate copolymer 20 parts (Solvine CN Nissin Chemical Industry Co., Ltd.)
・ Side chain type / epoxy aralkyl modified silicone oil 1 part (X-22-3000T Shin-Etsu Chemical Co., Ltd.)
・ Both-end type / Carbinol-modified silicone oil 0.2 parts (X-22-160AS Shin-Etsu Chemical Co., Ltd.)
・ Toluene 80 parts ・ Methyl ethyl ketone 80 parts

(Comparative Example 3)
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) (Art Pearl C-800 Negami Industrial Co., Ltd.) of the receiving layer coating solution 1 was used as a metal soap (average particle size: 4-5 μm) (SZ-PF Sakai Chemical Industry Co., Ltd.) The thermal transfer image-receiving sheet of Comparative Example 3 was the same as Example 1 except that the receiving layer coating solution C was changed to 0.06 part. Obtained.

(Comparative Example 4)
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) (Art Pearl C-800 Negami Industrial Co., Ltd.) of the receiving layer coating solution 1 was used as a metal soap (average particle size: 4-5 μm) (LBT-1830 refining Sakai Chemical Industry Co., Ltd.) The thermal transfer image-receiving sheet of Comparative Example 4 in the same manner as in Example 1 except that the receiving layer coating solution D was changed to 0.06 part. Got.

(Comparative Example 5)
In place of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) (Art Pearl C-800 Negami Industrial Co., Ltd.) of the receiving layer coating solution 1 was used with talc (average particle size: 5 μm). ) (Microace P-3 Nihon Talc Co., Ltd.) A thermal transfer image-receiving sheet of Comparative Example 5 was obtained in the same manner as in Example 1 except that the receiving layer coating solution E was changed to 0.06 part. .

(Comparative Example 6)
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) of the receiving layer coating solution 1 (Art Pearl C-800 Negami Industrial Co., Ltd.) was crosslinked MMA (average particle size: 4-5 μm) (Epester MA-1004 Nippon Shokubai Co., Ltd.) The thermal transfer image-receiving sheet of Comparative Example 6 was the same as Example 1 except that the receiving layer coating solution F was changed to 0.06 parts. Obtained.

(Comparative Example 7)
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) of the receiving layer coating solution 1 (Art Pearl C-800 Negami Industrial Co., Ltd.) was crosslinked MMA (average particle size: 5-7 μm) (Epester MA-1006 Nippon Shokubai Co., Ltd.) The thermal transfer image-receiving sheet of Comparative Example 7 was the same as Example 1 except that the receiving layer coating solution G was changed to 0.06 parts. Obtained.

(Comparative Example 8)
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) of the receiving layer coating solution 1 (Art Pearl C-800 Negami Industrial Co., Ltd.) was used as a spherical silicone (average particle size: 6 μm) (Tospearl 2000B Momentive Performance Materials) A thermal transfer image-receiving sheet of Comparative Example 8 was obtained in the same manner as in Example 1 except that the receiving layer coating solution H was changed to 0.06 part. .

(Comparative Example 9)
In place of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) (Art Pearl C-800 Negami Industrial Co., Ltd.) of the receiving layer coating solution 1 was replaced with polyethylene wax (Polywax 400 Baker). (Petrolite) A thermal transfer image-receiving sheet of Comparative Example 9 was obtained in the same manner as in Example 1 except that the receiving layer coating liquid I was changed to 0.06 part.

(Comparative Example 10)
Instead of the receiving layer coating solution 1, only the urethane filler (average particle size: 6 μm) (Art Pearl C-800 Negami Industrial Co., Ltd.) of the receiving layer coating solution 1 was made of polyethylene wax (average particle size: 10 μm) (Polywax 3000 Baker Petrolite) A thermal transfer image-receiving sheet of Comparative Example 10 was obtained in the same manner as in Example 1 except that the receiving layer coating solution J was changed to 0.06 part.

(Evaluation of frictional force)
Using the dye ribbon of the media set CW-MS46 and the thermal transfer image receiving sheets of the examples and comparative examples in combination, the friction coefficient (μp) at the time of image formation of primary color and tertiary color was measured. In addition, as a primary color, the thermal transfer image receiving sheet of each Example and a comparative example, and the Ye ribbon of the media set CW-MS46 are piled up, a friction coefficient (micro | micron | mu) is measured, and as a tertiary color, The Y, Mg images are formed on the thermal transfer image receiving sheets of the examples and comparative examples, and the thermal transfer image receiving sheets of the examples and comparative examples after the formation of the Ye and Mg images are overlapped with the Cy ribbon to generate a friction coefficient. (Μp) measurement was performed. The coefficient of friction was measured by a method based on JIS K 7125. Table 1 shows the measurement results of the coefficient of friction (μp) during the image formation of the primary color and the tertiary color. The friction coefficient (μp) is closely related to the occurrence of print wrinkles, and the higher the friction coefficient, the more the occurrence of print wrinkles is suppressed, and the friction coefficients of primary and tertiary colors. The smaller the difference, the smaller the occurrence of print wrinkles. Based on the friction coefficient (μp), the overall evaluation of the frictional force was performed based on the following evaluation criteria.

"Evaluation criteria"
A: The primary color μp is 0.35 or more and the difference from the tertiary color μp is 0.1 or less. ○: The primary color μp is 0.35 or more and the tertiary color μp. The difference is less than 0.1 to 0.2 Δ: μp of primary color is 0.30 or more and less than 0.35, and the difference from μp of tertiary color is less than 0.2 ×: μp of primary color is 0.30 or more and less than 0.35 and the difference from μp of the tertiary color is 0.2 or more xx: μp of the primary color is less than 0.30

(Roughness evaluation)
The dye ribbon of the media set CW-MS46 of the sublimation type thermal transfer printer (manufactured by ALTECH ADS Co., Ltd., model: CW-01) and the thermal transfer image-receiving sheet of each example and comparative example are used in combination. In addition, three patterns of 195/255 gradation, 155/255 gradation, and 115/255 gradation were printed on the thermal transfer image receiving sheet of the comparative example to form an image of each pattern. It was visually confirmed whether or not the images of the obtained patterns had roughness, and the roughness was evaluated based on the following evaluation criteria. The evaluation results are also shown in Table 1. Roughness refers to innumerable minute density unevenness seen in the entire image coloring portion.

"Evaluation criteria"
○: Good in all images with no roughness.
Δ: Slight roughness occurs in one or more images, but at a level that does not cause a problem in use.
X: Roughness that is a problem in use is observed in each image.

(Evaluation of releasability)
The dye ribbon of the media set CW-MS46 of the sublimation type thermal transfer printer (manufactured by ALTECH ADS Co., Ltd., model: CW-01) and the thermal transfer image-receiving sheet of each example and comparative example are used in combination. In addition, a vertical stripe image (black solid image ((255/255 gradation), gray image (180/255 gradation))) with a width of 2 cm was printed on the thermal transfer image-receiving sheet of Comparative Example, and peeling marks were formed on the obtained printed matter. The release property was confirmed by visual observation and the releasability was evaluated based on the following evaluation criteria, and the evaluation results are also shown in Table 1.

"Evaluation criteria"
○: There is no peeling mark on the printed material.
Δ: Peeling marks appear slightly on the print.
X: There are peeling marks on the printed material.

DESCRIPTION OF SYMBOLS 100 ... Thermal transfer image receiving sheet 1 ... Support body 2 ... Receiving layer 6 ... Primer layer 8 ... Back surface layer 11 ... Base material 12 ... Adhesive layer 13 ... Film

Claims (2)

A thermal transfer image receiving sheet provided with a receiving layer on one side of a support,
The receptor layer includes a binder resin and a release agent,
The receiving layer further includes one or more elastic fillers selected from the group consisting of urethane fillers, silicone fillers, polytetrafluoroethylene fillers, mixed fillers of polytetrafluoroethylene and polyethylene, and polypropylene fillers. A thermal transfer image-receiving sheet.   The said receiving layer contains the said elastic filler in 0.05 mass% or more and 0.8 mass% or less with respect to the solid content total amount of the said binder resin, It is characterized by the above-mentioned. Thermal transfer image receiving sheet.

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