JPH04221688A - Thermal transfer recording image receiving sheet and preparation of recording material - Google Patents

Abstract

PURPOSE:To provide a thermal transfer recording image receiving sheet for the purpose of preparing a recording material wherein the prevention of the fading of an image and the enhancement of scratch resistance are achieved. CONSTITUTION:The thermal transfer recording image receiving sheet of the claim 1 is formed by laminating an image receiving layer on a transparent support. In the method for preparing a recording material of the clain 2, the image receiving layer of the thermal transfer recording image receiving sheet of the claim 1 and the ink layer of a thermal transfer recording ink sheet formed by laminating the ink layer containing a heat-diffusible dye on a support are superposed one upon another to be imagewise heated to form the image of the heat-diffusible dye on the image receiving layer and the image receiving layer is subsequently thermally fused to a base material.

Description

Description: [0001] The present invention relates to an image-receiving sheet for thermal transfer recording and a method for producing a recording medium using the same, and more particularly, it relates to an image-receiving sheet for thermal transfer recording and a method for producing a recording medium using the same. The present invention relates to an image-receiving sheet for thermal transfer recording used to manufacture a recording medium with improved properties, and a method for manufacturing the recording medium. [0002] As a method for obtaining color hard copies, color recording techniques such as inkjet, electrophotography, and thermal transfer are being considered. Among these, the thermal transfer method in particular has advantages such as ease of operation and maintenance, miniaturization of the device, low cost, and low running cost. In this thermal transfer method, a transfer sheet (also referred to as a thermal transfer recording material) having a meltable ink layer on a support is heated by a thermal head, and the ink is transferred to the transfer sheet (
Also called image receiving material. ), and an ink sheet for thermal transfer recording, which has an ink layer containing a heat-diffusible dye (sublimable dye) on a support, is heated with a thermal head to form an image-receiving sheet for thermal transfer recording. 2 of the heat diffusion transfer method (sublimation transfer method) for transferring the heat diffusible dye to the image receiving layer
There are different types, but this thermal diffusion transfer method allows you to control the gradation of the image by changing the amount of dye transferred in response to changes in the thermal energy of the thermal head.
It is advantageous for full color recording. Incidentally, recently, image-receiving sheets for thermal transfer recording on which images have been formed have been increasingly used as recording media, for example, cards such as driver's licenses and cash cards. However, the image tends to fade due to ultraviolet rays, and the dye in the image bleeds onto the surface of the image-receiving layer.
It has problems such as being easily rubbed off by hand (low scratch resistance). Particularly in order to solve the former problem, attempts have been made to add an ultraviolet absorber to the image-receiving layer, but this has not produced the desired effect. The present invention has been made to solve the above problems. That is, an object of the present invention is to provide an image-receiving sheet for thermal transfer recording, which is used to produce a recording material that prevents image fading, bleeds, and improves scratch resistance, and a method for producing the recording material. It is about providing. [Means for Solving the Problems] The image-receiving sheet for thermal transfer recording of the present invention (invention of claim 1) to achieve the above object comprises laminating an image-receiving layer on a transparent support. It is characterized by becoming. [0010] Furthermore, the method for producing a recording medium according to the present invention (invention of claim 2) comprises disposing the image receiving layer of the image receiving sheet for thermal transfer recording according to claim 1 and an ink layer containing a heat-diffusible dye on a support. An image of the heat-diffusible dye is formed on the image-receiving layer by overlapping the ink layer of the laminated ink sheet for thermal transfer recording and imagewise heating. It is characterized by being fused. The present invention will be explained in detail below. [1] Image-receiving sheet for thermal transfer recording The image-receiving sheet for thermal transfer recording of the present invention basically comprises a transparent support and an image-receiving layer laminated thereon. -Support- Examples of the support for the image-receiving sheet for heat-sensitive transfer recording include transparent polyolefin films such as transparent polyethylene terephthalate base film, transparent polyethylene terephthalate base film, transparent polyethylene, and transparent polypropylene film; Examples include transparent polyhalogenated olefin films, with transparent polyvinyl chloride films being typical examples. In the present invention, it is desirable that these supports contain an ultraviolet inhibitor. The above-mentioned ultraviolet inhibitor is an additive that prevents substances from deteriorating due to ultraviolet rays, and is generally classified into ultraviolet absorbers and light stabilizers in terms of its functionality. As ultraviolet absorbers and light stabilizers, JP-A-59-158287;
63-74686, 63-145089, 59-
196292, 62-229594, 63-1225
96, 61-283595, JP 1-204788
Examples include the compounds described in , et al., and compounds known to improve image durability in photographs and other image recording materials. [0016] Ultraviolet absorbers are substances that themselves absorb ultraviolet rays and prevent photosensitive sites from being excited by ultraviolet rays.
Examples include benzotriazole, salicylic acid, benzophenone, and cyanoacrylate. In addition, photostabilizers have the effect of returning a photosensitive site in the ground state that has become excited by ultraviolet light to its original ground state; UV stabilizers such as organic nickel compounds,
Examples include hindered amine light stabilizers. [0017] As these ultraviolet inhibitors, an ultraviolet absorber may be used alone, or a light stabilizer may be used in combination. Further, each of the ultraviolet absorber and the light stabilizer can be used alone or in combination of two or more kinds. [0018] The amount of ultraviolet inhibitor added to the support is as follows:
Usually 0.001 to 30% by weight, preferably 0.01 to 30% by weight
It is 10% by weight. [0019] In order to incorporate the ultraviolet ray inhibitor into the support, it is preferable to adopt a method of adding the ultraviolet ray inhibitor to the plastic raw material of the support at the time of manufacturing the support. The thickness of the support is not particularly limited in the present invention, but is usually 2 to 800 μm, preferably 10 to 800 μm.
It is 200 μm. -Image-receiving layer- The image-receiving layer can be formed from a binder and various additives. In some cases, the image-receiving layer can be formed using only a binder. 1. Binder The binder includes, for example, polyvinyl chloride resin,
Polyvinyl chloride resins, polyester resins, acrylic acid resins, methacrylic acid resins, polyvinylpyrrolidone, typified by copolymers of vinyl chloride and other monomers (e.g. alkyl vinyl ether, vinyl acetate, etc.)
Examples include polycarbonate, cellulose triacetate, styrene resin, vinyltoluene acrylate resin, polyurethane resin, polyamide resin, urea resin, polycaprolactone resin, styrene-maleic anhydride resin, and polyacrylonitrile resin. The various resins mentioned above may be newly synthesized and used, but commercially available products may also be used. In any case, from the viewpoint of physical properties, resins with glass transition points (Tg) in the range of -20 to 150°C, particularly 30 to 120°C, are suitable as binders for the image-receiving layer.
Preferably, the resin has an Mw in the range of 2,000 to 100,000. [0025] In forming the image-receiving layer, the various resins mentioned above make use of their reactive active sites (if there are no reactive active sites, they are added to the resin), and radiation, heat, moisture, catalysts, etc. It may be crosslinked or cured by, for example. In that case, a radiation active monomer such as epoxy or acrylic, or a crosslinking agent such as isocyanate can be used. 2. Additives A release agent, an antioxidant, a UV absorber, a light stabilizer, a filler (inorganic fine particles, organic resin particles), and a pigment may be added to the additive image-receiving layer. Furthermore, a plasticizer, a hot solvent, etc. may be added as a sensitizer. The release agent can improve the releasability between the ink sheet for thermal transfer recording and the image-receiving sheet for thermal transfer recording. Such release agents include silicone oil (including what is called silicone resin); solid waxes such as polyethylene wax, amide wax, and Teflon powder; fluorine-based and phosphoric acid ester-based surfactants; Among them, silicone oil is preferred. [0030] There are two types of silicone oil: a type in which it is simply added (simple addition type) and a type in which it is cured or reacted (curing reaction type). In the case of the simple addition type, it is preferable to use modified silicone oil in order to improve compatibility with the binder. Examples of the modified silicone oil include polyester modified silicone resin (or silicone modified polyester resin), acrylic modified silicone resin (or
silicone-modified acrylic resin), urethane-modified silicone resin (or silicone-modified urethane resin), cellulose-modified silicone resin (or silicone-modified cellulose resin), alkyd-modified silicone resin (or silicone-modified alkyd resin), epoxy-modified silicone resin ( or silicone-modified epoxy resin). Specifically, polyester-modified silicone resin containing polysiloxane resin in the main chain and copolymerized with polyester in block form, silicone-modified polyester resin having dimethylpolysiloxane moieties as side chains bonded to the polyester main chain. , block copolymers, alternating copolymers, graft copolymers, random copolymers, etc. of dimethylpolysiloxane and polyester can also be used as the modified silicone oil or resin. Particularly in the present invention, it is preferable to add a polyester-modified silicone resin. Typical polyester-modified silicone resins include, for example, a copolymer of diol and dibasic acid, or a block copolymer of polyester, which is a ring-opening polymer of caprolactone, and dimethylpolysiloxane (both dimethylpolysiloxane and dimethylpolysiloxane). (Contains a copolymer in which the terminal or one terminal is blocked with the above polyester moiety, or conversely, the above polyester is blocked with dimethylpolysiloxane), or the above polyester is the main chain and the side chain is (dimethyl)polysiloxane. A copolymer formed by bonding siloxane can be mentioned. [0036] The amount of these simple addition type silicone oils cannot be uniformly determined as it may vary depending on the type of silicone oil, but generally speaking, it is usually The amount is 0.5 to 50% by weight, preferably 1 to 20% by weight. [0037] As curing reaction type silicone oil,
Examples include reaction curing type, photo curing type, catalyst curing type, and the like. [0038] As a reaction-curing silicone oil, there is one obtained by reaction-curing an amino-modified silicone oil and an epoxy-modified silicone oil. [0039] Catalytic curing type or photo curing type silicone oils include KS-705F-PS and KS-70.
5F-PS-1, KS-770-PL-3 [Both catalytic curing silicone oils: manufactured by Shin-Etsu Chemical Co., Ltd.]
, KS-720, KS-774-PL-3 [all photocurable silicone oils: manufactured by Shin-Etsu Chemical Co., Ltd.], and the like. The amount of these curable silicone oils added is preferably 0.5 to 30% by weight of the binder for the image-receiving layer. [0041] A release agent layer can also be provided on a part of the surface of the image-receiving layer by dissolving or dispersing the above-mentioned release agent in a suitable solvent and applying the solution, followed by drying. [0042] Next, as the antioxidant, JP-A-59
-182785, 60-130735, JP-A-1-1
Antioxidants such as those described in No. 27387, and compounds known to improve image durability in photographs and other image recording materials can be mentioned. [0043] The UV absorber and light stabilizer include:
JP-A-59-158287, JP-A No. 63-74686,
No. 63-145089, No. 59-196292, No. 62-229594, No. 63-122596, No. 61
Examples include compounds described in publications such as No. 283595 and JP-A No. 1-204788, and compounds known to improve image durability in photographs and other image recording materials. [0044] Examples of the filler include inorganic fine particles and organic resin particles. Examples of the inorganic fine particles include silica gel, calcium carbonate, titanium oxide, acid clay, activated clay, alumina, etc., and examples of the organic fine particles include resin particles such as fluororesin particles, guanamine resin particles, acrylic resin particles, and silicone resin particles. can be mentioned. These inorganic/organic resin particles vary depending on their specific gravity, but are preferably added in an amount of 0.1 to 70% by weight. Typical examples of the pigment include titanium white, calcium carbonate, zinc oxide, barium sulfate, silica, talc, clay, kaolin, activated clay, and acid clay. [0046] As the plasticizer, phthalate esters (
For example, dimethyl phthalate, dibutyl phthalate, dioctyl phthalate, didecyl phthalate, etc.), trimellitic acid esters (for example, octyl trimellitate,
trimellitic acid isononyl ester, trimellitic acid isodesol ester, etc.), pyromellitic acid esters such as pyromellitic acid octyl ester, adipate esters (dioctyl adipate, methyl lauryl adipate, di-2-adipate) ethylhexyl, ethyl lauryl adipate, etc.), other oleic acid esters,
Succinic acid esters, maleic acid esters, sebacic acid esters, citric acid esters, epoxidized soybean oil, epoxidized linseed oil, epoxy stearate, as well as esters such as triphenyl phosphate and tricresyl phosphate. Phosphite esters, phosphorous esters such as triphenyl phosphite, tris tridecyl phosphite, dibutyl hydrogen phosphite, glycol esters such as ethyl phthalyl ethyl glycolate, butylphthalyl butyl glycolate, etc. can be given. In the present invention, the total amount of additives added is usually in the range of 0.1 to 50% by weight based on the binder for the image-receiving layer. [2] Manufacture of an image-receiving sheet for thermal transfer recording An image-receiving sheet for thermal transfer recording is prepared by dispersing or dissolving the components for forming the image-receiving layer in a solvent to prepare a coating liquid for the image-receiving layer. It can be formed by a coating method in which a coating liquid is applied to the surface of a support and dried, or a lamination method in which a mixture containing the components for forming the image-receiving layer is melt-extruded and laminated on the surface of the support. Examples of the solvent used in the above coating method include tetrahydrofuran, methyl ethyl ketone, toluene, xylene, chloroform, dioxane, acetone, cyclohexane, and n-butyl acetate. For the coating, conventionally known coating methods using a gravure roll, extrusion coating method, wire bar coating method, roll coating method, etc. can be employed. The image-receiving layer may be formed over the entire surface of the support, or may be formed on a part of the surface. The thickness of the image-receiving layer formed on the surface of the support is generally about 2 to 50 μm, preferably about 3 to 20 μm. In the image-receiving sheet for thermal transfer recording of the present invention, in order to more effectively prevent fusion with the ink layer of the ink sheet for thermal transfer recording, a release agent (the silicone resin described above) is added to the surface of the image-receiving layer. , a modified silicone resin, a silicone oil film, or a cured product thereof) may be further laminated. [0053] The thickness of this peeling layer is usually 0.03 to 2.
It is 0 μm. -Other Layers- In the image-receiving sheet for thermal transfer recording of the present invention, an undercoat layer may be provided between the support and the image-receiving layer for the following purposes. a. The purpose is to improve the adhesion of the image-receiving layer to the support. b. The purpose is to increase cushioning properties (when pushing with the head). c. The purpose is to prevent the diffusion of heat-diffusible dyes into the support. d. The purpose is to improve insulation (to prevent heat from escaping to the support). e. The purpose is to absorb ultraviolet rays. [0055] For the above purpose (a), the undercoat layer is preferably formed of an adhesive composition. [0056] This adhesive composition includes, for example, an adhesive composition comprising an ethylene-vinyl chloride copolymer, a wax, a plasticizer, a tackifier, an antioxidant, a polyvinyl acetate emulsion adhesive composition, Examples include polyester-based adhesive compositions, chloroprene-based adhesive compositions, and epoxy resin-based adhesive compositions. [0057] For the purpose b above, the undercoat layer may be formed of, for example, urethane resin, acrylic resin, ethylene resin, butadiene rubber, epoxy resin, or the like. For the purpose c above, it is preferable to use polycarbonate resin or polyvinylidene chloride resin, for example. For the purpose d above, for example, polyurethane foam, vinyl chloride resin foam, styrene resin foam,
It is preferably formed from a plastic foam such as a phenolic resin foam. [0060] For the purpose of e above, it is preferable to add to the materials listed in a to d above an ultraviolet ray inhibitor of the type and amount mentioned in the section of the support. For any purpose, the thickness of the undercoat layer is usually 0.1 to 100 μm, preferably 0.5 to 20 μm. Further, a back coat layer made of, for example, polycarbonate resin may be provided on the surface of the support opposite to the image-receiving layer (back surface) for the purpose of image protection. The thickness of this back coat layer is usually 0.1
-50 μm, preferably 0.5-10 μm. [0064] Furthermore, the above-mentioned type and amount of ultraviolet absorber can also be added to this backcoat layer. [3] Ink sheet for thermal transfer recording The ink sheet for thermal transfer recording can be composed of a support and an ink layer formed thereon. -Support- The support for the ink sheet for thermal transfer recording may be any material as long as it has good dimensional stability and can withstand the heat during recording with a thermal head, such as condenser paper or glassine paper. Heat-resistant plastic films such as thin paper, polyethylene terephthalate, polyethylene naphthalate, polyamide, polyimide, polycarbonate, polysulfone, polyvinyl alcohol cellophane, and polystyrene can be used. The thickness of the support is preferably 2 to 10 μm. The shape of the support is not particularly limited, and may be of any shape, such as a wide sheet or film, or a narrow tape or card. -Ink layer- The ink layer basically contains a heat-diffusible dye and a binder. 1. Heat-diffusible dyes Examples of heat-diffusible dyes include cyan dyes, magenta dyes, and yellow dyes. [0071] As the cyan dye, JP-A-59-7
No. 8896, No. 59-227948, No. 60-249
No. 66, No. 60-53563, No. 60-130735
No. 60-131292, No. 60-239289, No. 61-19396, No. 61-22993, No. 6
No. 1-31292, No. 61-31467, No. 61-3
No. 5994, No. 61-49893, No. 61-1482
No. 69, No. 62-191191, No. 63-91288
Examples include naphthoquinone dyes, anthraquinone dyes, and azomethine dyes described in publications such as No. 63-91287 and No. 63-290793. [0072] As the magenta dye, JP-A-59-
No. 78896, JP-A-60-30392, JP-A-60
-30394, JP 60-253595, JP 61-262190, JP 63-5992, JP 63-205288, JP 64-159, JP 64-63194 Examples include anthraquinone dyes, azo dyes, azomethine dyes, etc., which are described in various publications such as No. [0073] As a yellow dye, JP-A-59-78
No. 896, JP-A-60-27594, JP-A-60-3
No. 1560, JP-A-60-53565, JP-A-61-
Examples include methine dyes, azo dyes, quinophthalone dyes, and anthrisothiazole dyes described in publications such as No. 12394 and JP-A-63-122594. Particularly preferred as the heat-diffusible dye is a compound having an open-chain or closed-chain active methylene group, and an oxidized product of a p-phenylenediamine derivative or a p-phenylenediamine derivative.
Azomethine dye obtained by a coupling reaction with an oxidized product of an aminophenol derivative and indoaniline obtained by a coupling reaction with an oxidized product of a phenol or naphthol derivative or a p-phenylenediamine derivative or an oxidized product of a p-aminophenol derivative. It is a pigment. The heat-diffusible dye contained in the ink layer may be any of a yellow dye, a magenta dye, and a cyan dye, as long as the image to be formed is monochromatic. Furthermore, depending on the color tone of the image to be formed, it may contain two or more of the three types of dyes or other heat-diffusible dyes. The amount of the heat-diffusible dye used is usually 0.1 to 5 g, preferably 0.2 to 2 g per 1 m 2 of the support.
It is g. 2. Binder Binders for the ink layer include cellulose resins such as ethyl cellulose, hydroxyethyl cellulose, ethyl hydroxyethyl cellulose, hydroxypropyl cellulose, methyl cellulose, cellulose acetate, and cellulose acetate butyrate; polyvinyl alcohol, polyvinyl formal, polyvinyl butyral, polyvinyl pyrrolidone,
Polyvinyl acetate, polyacrylamide, polyvinyl acetoacetal, styrene resin, styrene copolymer resin,
Examples include vinyl resins such as polyacrylic acid ester, polyacrylic acid, and acrylic acid copolymers, rubber resins, ionomer resins, olefin resins, and polyester resins. Among these resins, polyvinyl butyral, polyvinyl acetoacetal or cellulose resins are preferred because of their excellent storage stability. [0079] The above-mentioned various binders can be used singly or in combination of two or more. The weight ratio of the binder to the heat-diffusible dye is preferably from 1:10 to 10:1, particularly preferably from 2:8 to 8:2. 3. Other Optional Components Furthermore, various additives may be added to the ink layer within a range that does not impede the object of the present invention. The additives include silicone resin, silicone oil (reactive curing type is also possible), silicone modified resin, fluororesin, surfactant, and peeling compounds such as waxes, fine metal powder, silica gel, and metal oxide. Examples include fillers such as carbon black and fine resin powder, and curing agents that can react with binder components (for example, radiation active compounds such as isocyanates, acrylics, and epoxies). Furthermore, as additives there may be mentioned heat-melting substances for accelerating transfer, such as waxes, higher fatty acid esters, and other compounds described in JP-A-59-106997. -Other Layers- The support may be provided with a subbing layer for the purpose of improving adhesion to the binder and preventing transfer and dyeing of the dye to the support. Furthermore, a backing layer may be provided on the opposite surface (back surface) of the support from the ink layer for the purpose of running stability, heat resistance, and antistatic properties. [0086] The thickness of this backing layer is usually 0.1~
1 μm [4] Manufacture of ink sheet for thermal transfer recording The ink sheet for thermal transfer recording is prepared by dispersing or dissolving the various components forming the ink layer in a solvent to prepare a coating liquid for forming the ink layer. , can be manufactured by coating the surface of a support and drying it. [0087] The above-mentioned binders are used by dissolving one or more of them in a solvent or dispersing them in a latex form. Examples of the solvent include water, alcohols (eg, ethanol, propanol), cellosolves (eg, methyl cellosolve, ethyl cellosolve), and aromatics (eg, methyl cellosolve, ethyl cellosolve).
(e.g., toluene, xylene, chlorobenzene), ketones (e.g., acetone, methyl ethyl ketone), ester solvents (e.g., ethyl acetate, butyl acetate, etc.), ethers (e.g., tetrahydrofuran, dioxane), chlorinated solvents (e.g., chloroform, trichloroethylene)
etc. [0089] For the above-mentioned coating, conventional methods such as surface sequential coating using a gravure roll, extrusion coating, wire bar coating, roll coating, etc. can be employed. The ink layer may be formed as a layer containing a single color heat-diffusible dye on the entire surface or a part of the surface of the support, or may be formed as a layer containing a monochromatic heat-diffusible dye, or a yellow ink layer containing a binder and a yellow dye. A magenta ink layer containing a binder and a magenta dye and a cyan ink layer containing a binder and a cyan dye are formed on the entire surface or a part of the surface of the support in a constant repetition along the plane direction. You can leave it there. The thickness of the ink layer thus formed is usually 0.2 to 10 μm, preferably 0.3 to 3 μm.
It is μm. [0092] The ink sheet for thermal transfer recording may be provided with perforations or detection marks for detecting the positions of areas with different hues to facilitate use. The ink sheet for thermal transfer recording is not limited to the structure consisting of a support and a heat-sensitive layer formed thereon, and other layers may be formed on the surface of the ink layer. For example, an overcoat layer may be provided for the purpose of preventing fusion with the image-receiving sheet for thermal transfer recording and setting-off (blocking) of the heat-diffusible dye. [5] Method for manufacturing a recording medium In the method for manufacturing a recording medium of the present invention, first, using the image-receiving sheet for thermal transfer recording and the ink sheet for thermal transfer recording, image-receiving of the image-receiving sheet for thermal transfer recording is performed. forming an image on the layer; For this purpose, as illustrated in FIG. 1, an ink layer 3 on a support 2 of an ink sheet 1 for thermal transfer recording,
The image-receiving layer 6 on the support 5 of the image-receiving sheet 4 for thermal transfer recording is superimposed, and thermal energy is applied imagewise to the interface between the ink layer 3 and the image-receiving layer 6. The heat-diffusible dye in the ink layer 3 vaporizes or sublimates in an amount corresponding to the applied thermal energy, moves to the image-receiving layer 6 side and is received, and an image is formed on the image-receiving layer 6. As the heat source for providing the thermal energy, known sources such as a thermal head, a laser beam, an infrared flash, a thermal pen, etc. can be used. When a thermal head is used as a heat source for applying thermal energy, the applied thermal energy can be changed continuously or in multiple steps by modulating the voltage or pulse width applied to the thermal head. When laser light is used as a heat source for providing thermal energy, the heat energy provided can be changed by changing the amount of laser light and the irradiation area. [0100] In this case, in order to facilitate the absorption of laser light, it is preferable to make a laser light absorbing material (for example, in the case of a semiconductor laser, carbon black or a near-infrared absorbing substance) exist in the ink layer or near the ink layer. . When using a laser beam, it is preferable to bring the ink sheet for thermal transfer recording and the image-receiving sheet for thermal transfer recording into close contact with each other. [0102] If a dot generator incorporating an acousto-optic element is used, thermal energy can be applied depending on the size of halftone dots. [0103] When an infrared flash lamp is used as a heat source for providing thermal energy, heating is preferably performed through a colored layer such as black, as in the case of using laser light. [0104] Alternatively, heating may be performed through a pattern or halftone dot pattern that continuously expresses the shading of an image, such as black, or a colored layer such as black on one side and a negative of the above pattern. Heating may be performed in combination with negative patterns. Thermal energy may be applied from the ink sheet side for thermal transfer recording, from the image receiving sheet side for thermal transfer recording, or from both sides, but it is possible to form an image with less thermal energy. If so, it is desirable to do it from the ink sheet side for thermal transfer recording. [0106] By the above thermal transfer recording, it is possible to record a one-color image on the image receiving layer of the image receiving sheet for thermal transfer recording, but according to the method described below, it is possible to obtain a color photographic color image consisting of a combination of each color. You can also do it. [0107] For example, by sequentially replacing yellow, magenta, cyan, and, if necessary, black thermal transfer recording sheets and performing thermal transfer according to each color, a color photographic color image consisting of a combination of each color is obtained. You can also do that. The following method is also effective. That is,
Instead of using ink sheets for thermal transfer recording of each color as described above, an ink sheet for thermal transfer recording that has areas pre-painted in each color is used. First, a yellow color separation image is thermally transferred using the yellow area, then a magenta color separation image is thermally transferred using the magenta area, and then yellow, magenta, cyan, and Then, if necessary, a method is adopted in which the image is thermally transferred in order with the black color separation image. [0110] Although it is possible to obtain a color photographic-like color image with this method, a further advantage is that this method does not require replacing the heat-sensitive sheet for heat-sensitive transfer recording as described above. There is. After forming an image on the image-receiving layer 6 in this way, in the method for producing a recording medium of the present invention, as illustrated in FIG. , heat-seal the two. [0112] As a result, a recording medium 8 is formed in which the base material 7, the image-receiving layer 6 having an image, and the transparent support 5 are integrated.
can be obtained. As the base material 7, a sheet made of a self-supporting material that melts with heat, generally a sheet made of thermoplastic resin, can be suitably used. When the heating temperature is kept low or when a hard resin base material is used, a thermoplastic resin layer 10 is further laminated on the base material 9 as shown in FIG. By overlapping and heating the image receiving layer 12 on the support 13, the two can be thermally fused and an integrated recording medium 14 can be obtained. [0115] Specifically, for example, a sheet of thermoplastic resin used for forming the image-receiving layer can be mentioned. Among these, vinyl chloride resin sheets are preferred, and vinyl chloride resin sheets are particularly preferred. [0117] These sheets may be colored,
Among these, white is preferable in order to make the transferred image look clear. The thermal fusion is achieved by heating for a short period of time so that the materials forming the image receiving layer and the base material can be softened and melted and will not adversely affect image fixation. [0119] In the recording medium obtained by the above-described manufacturing method of the present invention, since both sides of the image-receiving layer having an image are protected by a base material and a support, fading of the image due to ultraviolet rays can be prevented. Also, it has excellent scratch resistance. The image on the image-receiving layer can be clearly seen through the transparent support. [Examples] Next, the present invention will be explained in more detail with reference to Examples and Comparative Examples. In addition, in the following, "part" means "part by weight". (Example 1) A coating liquid for forming an ink layer having the following composition was dried by a wire bar coating method on the corona-treated surface of a 6 μm thick polyethylene terephthalate film [manufactured by Toray Industries, Inc.] as a support. Apply the film to a thickness of 1 μm, dry it, and use a dropper to apply 1 or 2 drops of silicone oil [manufactured by Shin-Etsu Silicone Co., Ltd., X-41, 4003A] to the back surface that has not been corona-treated, covering the entire surface. An ink sheet for thermal transfer recording was obtained by spreading and performing a backside treatment coat. [0123] Coating liquid for ink layer formation: Heat-diffusible dye: 2 parts
[Nippon Kayaku Co., Ltd., Kayaset Blue 136] Polyvinyl butyral 3 parts
[Manufactured by Sekisui Chemical Co., Ltd., S-LEC BX
-1] Methyl ethyl ketone
・・・・・・・・・・・・・・・85 copies
Cyclohexanone・・・・・・・・・・・・・・・
...10 copies. [0124] Next, a colorless transparent acrylic polymer film containing an ultraviolet ray inhibitor and having a thickness of 50 μm was used as a support.
Mitsubishi Rayon Co., Ltd., Acryprene HBS001] was coated with a coating solution for forming an image-receiving layer having the following composition by a wire-bar coating method, and then temporarily dried in a dryer, and then dried in an oven at a temperature of 100°C for 1 hour. In this way, an image-receiving sheet for thermal transfer recording was obtained, in which an image-receiving layer having a thickness of 10 μm was formed on a support. Coating liquid for forming image-receiving layer: Polyvinyl chloride resin...
・・・・・・・・・・・・・・・5.0
[Manufactured by Shin-Etsu Chemical Co., Ltd., TK600]
Vinyl chloride-isobutyl ether copolymer...4.5 parts [BAS
Manufactured by Company F, Laroflex MP25]
Polyester modified silicone resin・・・・・・・・・
...0.5 part [manufactured by Shin-Etsu Silicon Co., Ltd., X-24-8300 yen]
Methyl ethyl ketone・・・・・・・・・・・・
・・・ 80 parts Cyclohexanone ・・・・・・・・・・・・・・・ 10 parts. Next, the ink sheet for heat-sensitive transfer recording and the image-receiving sheet for heat-sensitive transfer recording are overlapped so that the surface of the ink layer of the former is in contact with the surface of the image-receiving layer of the latter, and the ink sheet for heat-sensitive transfer recording is Using a thermal head from the support side, output 0.4W/dot, pulse width 0.3-1
Image recording was performed by heating under conditions of 0 msec and a dot density of 6 dots/mm. After image recording, the surface of the image-receiving layer of the image-receiving sheet for thermal transfer recording and a white vinyl chloride resin sheet with a thickness of 280 μm [manufactured by Sumitomo Bakelite Co., Ltd., Sumilite]
VSS-HT-410] and the surface of 150
Thermal fusion was performed by heating and pressurizing with a heat roll heated to .degree. The image storage stability (image fading) and abrasion resistance of the obtained recording material were evaluated according to the following criteria. The results are shown in Table 1. Image storage stability (light resistance): The recording medium was measured with a xenon fade meter (70,000
After leaving the sample for one month at 1000 yen (Lux), the residual rate of cyan concentration was determined. Image storage stability (heat resistance): The recording medium was stored at 77°C and 80% relative humidity for one week.
After standing, the residual rate of cyan concentration was determined. [0132] Image blur: In the above-mentioned image-preserved (heat-resistant) recording material, dark
Microdensity is applied to the edges of the image giving a degree of 2.0.
Measure with a blank (cyan density: 0.1
0 or less) to the area that gives a concentration of 2.0.
and evaluated using the following criteria. 0133 □・・・0μ
m ≦ width < 5μm
○・・・・・・5μm ≦ Width ＜
15μm △・・
...15μm≦Width <30μm
×・・・・・・30μm≦
width . Scratch resistance: Scratches on the recording medium when rubbed 100 times with a pencil hardness of 4H
Visually determine the presence or absence of ○...
...The transferred image remains intact with almost no scratches.
there were. ◇
×・・・・・・The surface is scratched and some of the transferred images are affected.
I got it. (Example 2) The same procedure as in Example 1 was carried out except that the image-receiving layer coating solution used in Example 1 was changed to the following formulation. Coating liquid for forming image-receiving layer: Polyvinyl chloride resin...
・・・・・・・・・・・・・・・6.2 part
[Manufactured by Shin-Etsu Chemical Co., Ltd., TK600]
Vinyl chloride-isobutyl ether copolymer...3.0 parts [BA
Raroflex MP25 manufactured by SF Company]
Trimellitic acid alkyl ester...
...0.3 parts [Asahi Denka Kogyo Co., Ltd., Adesakaiser C-79]
Polyester modified silicone resin...
...0.2 parts [manufactured by Shin-Etsu Silicon Co., Ltd., x-24-8300 yen]
Ultraviolet absorber・・・・・・・・・・・・
...0.2 part [BAS
Manufactured by Company F, Uvinal N-35]
Heat stabilizer・・・・・・・・・・・・・・・・・・・・・
0.1 part [Manufactured by Akishima Chemical Industry Co., Ltd., FD-9] Methyl ethyl ketone 80 parts
Cyclohexanone・・・・・・・・・
...10 copies. (Example 3) The same procedure as in Example 1 was carried out except that a backing layer having the composition shown below was provided on the side opposite to the side on which the image-receiving layer was provided on the support in Example 1, with a dry film thickness of 1 μm. went. Coating liquid for forming backing layer Polycarbonate 9.8 parts
[Manufactured by Teijin Kasei Ltd., Panlite L13
00] Ultraviolet absorber...
・・・・・・・・・・・・・・・0.2 part
[Manufactured by BASF, Uvinal N-35]
1,2-dichloroethane...
・・・・・・・・・85 parts Cyclohexanone・・・・・・・・・・・・10 parts. (Example 4) A subbing layer having the following composition was placed between the image receiving layer and the support in Example 1 to a dry film thickness of 2 μm.
The same procedure as in Example 1 was carried out except that. Coating liquid for forming undercoat layer Polyvinyl chloride resin
・・・・・・・・・・・・・・・5.0 copies
[Manufactured by Shin-Etsu Chemical Co., Ltd., TK1000]
Methyl ethyl ketone...
・・・・・・85 parts Cyclohexanone・・・・・・・・・・・・10 parts. (Example 5) The support on which the image-receiving layer is coated is a colorless and transparent acrylic film with a thickness of 17 μm [Mitsubishi Rayon Co., Ltd.]
The process was carried out in the same manner as in Example 2, except that the thermal head used for image recording was used for the heat-sealing process instead of using ACRYPLENE HBC010, manufactured by Acryl Co., Ltd. (Example 6) Thickness 28 used in Example 1
Instead of a 0 μm white vinyl chloride resin sheet, a 760 μm thick white rigid vinyl chloride sheet was used, and a thermoplastic resin having the following composition was added to the surface to be heat-sealed to the image receiving layer so that the dry film thickness was 3 μm. The same procedure as in Example 1 was carried out except that the layer was provided. Coating liquid for forming thermoplastic resin layer Polyester resin 20 parts
[Manufactured by Toyobo Co., Ltd., Byron 290]
Methyl ethyl ketone...
・・・・・・・・・・・・35 copies
toluene···················
...35 parts Cyclohexanone...10 parts. (Comparative Example 1) The support on which the image-receiving layer is coated was changed to a 100 μm thick white polyethylene terephthalate film (manufactured by Diafoil Co., Ltd., W400, #100), and one side of the support was coated with the same material as in Example 1. An image-receiving layer was formed using a coating liquid for forming an image-receiving layer, and an ink sheet for thermal transfer recording and the above-mentioned image-receiving sheet for thermal transfer recording were superimposed, and an image was recorded using a thermal head. Note that the image was not protected by heat fusion as in Example 1. (Comparative Example 2) Comparative Example 1 was carried out in the same manner as in Comparative Example 1 except that the coating solution for forming the image receiving layer was changed to Example 2. [Table 1] [Effects of the Invention] According to the present invention, an image-receiving sheet for thermal transfer recording, which is used for producing a recording medium that achieves prevention of image fading and improvement of scratch resistance, And a method for manufacturing the recording medium can be provided.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing steps of a method for manufacturing a recording medium of the present invention.

FIG. 2 is a cross-sectional view showing the steps of the method for manufacturing a recording medium of the present invention.

FIG. 3 is a cross-sectional view showing the steps of the method for manufacturing a recording medium of the present invention.

[Explanation of symbols]

1 Ink sheet for thermal transfer recording 2 Support 3 Ink layer 4 Image receiving sheet for thermal transfer recording 5 Support 6 Image receiving layer 7 Base material 8 Adhesive layer 9 Adhesive layer laminated base material 10 Record body

Claims (3)

[Claims] 1. An image-receiving sheet for thermal transfer recording, comprising an image-receiving layer laminated on a transparent support. 2. The image-receiving layer of the image-receiving sheet for thermal transfer recording according to claim 1 and the ink layer of an ink sheet for thermal transfer recording formed by laminating an ink layer containing a heat-diffusible dye on a support. A method for producing a recording medium, comprising forming an image of the heat-diffusible dye on the image-receiving layer by imagewise heating, and then thermally fusing the image-receiving layer to a base material. 3. The method for producing a recording medium according to claim 2, wherein the base material is a vinyl chloride resin sheet.