JPH06316173A - Thermal transfer recording method - Google Patents

Abstract

PURPOSE:To simply, inexpensively and instantaneously form a character/figure rich in fine and complicated multicolor expression properties. CONSTITUTION:Patterning is applied to an image receiving sheet wherein a thermal adhesive resin is added to a plastic film or an image receiving sheet wherein a thermal image receiving layer based on the thermal adhesive resin is provided to one surface of the plastic film using a thermal transfer material wherein a release layer and a color ink layer substantially constituted of a resin and a colorant are provided on a base material. Therefore, close adhesion and scratch resistance are excellent and, therefore, this thermal transfer material sufficiently withstands practical use as a label, a marking film or a display article of every kind.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-sensitive transfer material comprising a base material and a release layer and a colored ink layer substantially composed of a resin and a colorant in that order, and an image-receiving sheet having heat-sensitive transfer acceptance. The present invention relates to a thermal transfer recording method using. More specifically, it relates to a thermal transfer recording method for easily obtaining a recorded matter having excellent weather resistance and scratch resistance.

[0002]

2. Description of the Related Art In recent years, thermal transfer recording apparatuses have been widely used in word processors, facsimiles, terminal printers, etc. because of their features such as non-impact, noiseless, maintenance-free, low price, small size and light weight. A general thermal transfer recording method is to superimpose a thermal transfer ink surface of a thermal transfer ink having a thermal transfer ink layer containing wax as a main component on a thin plastic film substrate and a transfer target material such as plain paper. Then, the thermal transfer ink layer is transferred from the back surface of the thermal transfer material to the plain paper surface by heating with a thermal head or the like for recording.

More recently, with the spread of factory automation, store automation, etc., a thermal transfer recording method has been used in the fields of labels and bar codes, and the adhesion, scratch resistance,
Various resistances such as scratch resistance and weather resistance are now required,
Further, since various resistances of the recorded matter itself have been required, the image receiving sheet is also changing from paper to plastic film such as synthetic paper. However, when a heat-sensitive transfer material composed mainly of a normal wax is used, a recording material having excellent transfer sensitivity and high resolution can be obtained, but since the image-receiving sheet has no heat-sensitive receiving property, the adhesion, scratch resistance, and weather resistance are deteriorated. I was not satisfied with the sex.

Regarding the heat-sensitive transfer material for improving the resistance of recorded matter, JP-A-1-120389 discloses a heat-sensitive transfer material containing a saturated polyester resin and an acrylic resin as main components.
Japanese Patent No. 387 discloses a thermal transfer material containing a linear saturated polyester resin as a main component. However, although the former has improved adhesion, it has a drawback that the colorant / resin weight ratio of the colored ink layer of the heat-sensitive transfer material is about 0.2 and the strength of the ink film is too high, resulting in scratches during transfer, that is, poor resolution. The latter does not contain wax in the colored ink layer of the heat-sensitive transfer material, but since the image-receiving sheet is a normal mirror-coated paper and no consideration is given to heat-sensitive receptive properties, the transferability and adhesion properties are sufficient. There was a drawback that could not be obtained.

Regarding the image-receiving sheet for improving the durability of recorded matter, JP-A-1-120389 provides an image-receiving layer mainly comprising a lubricant and a thermoplastic resin having a glass transition temperature of 50 to 100 ° C. on a base material. However, the surface gloss of the image receiving layer is inferior when a lubricant such as natural wax, synthetic wax, hard-ball fatty acid metal salt, etc. is contained, and the lubricant is inferior in weather resistance when used for outdoor applications. Due to deterioration due to such factors, there were practical defects such as discoloration and gloss deterioration.

On the other hand, among plastic films, polyester resin and urethane resin, which are generally rich in toughness and beauty, yield stress 1 to 6 kg / mm ² , film thickness approximately 30 to
The marking film made of polyvinyl chloride resin, which has an appropriate stiffness of 150 μm and is suitable for construction, has excellent properties such as weather resistance and dimensional stability. emblem,
It is commonly used as a motorcycle tank stripe, various emblems, markings for vehicles such as trucks and commercial vehicles, display members for indoor / outdoor advertisements, various guide plates, and decorative display materials such as window displays. Such marking film is usually used as a patterning means by directly cutting out the marking film with a cutting machine and using it as characters / designs, or by providing the characters / designs on the marking film by silk screen printing to create the display object. .

Among these processing means, in the cutting out of a pattern by a cutting machine, the minimum cutout area constituting the target character / design is limited by the accuracy of the cutting machine, so that a fine or complicated character / design is created. There is a limit to that, because it uses an applicator film of the same number as the hue to fix large letters and patterns consisting of multiple hues to the surface to be constructed, it is uneconomical and inefficient, and further cut out to the applicator film There are drawbacks such as the work of transferring letters and patterns is complicated and time-consuming. In addition, silk screen printing, which is used as a painting method, can create fine or complicated characters and designs, but it is inferior in immediacy because it involves the process of plate making, proofreading, and printing. Since the process of preparation and calibration occupies most of the cost, it was not possible to produce at low cost even if only a small number of sheets were needed.

In recent years, ink has been used in order to meet the above-mentioned problems of patterning methods by cutting and silk screen printing, that is, inexpensive, multicolor expression is possible, and immediacy and fine characters / patterns are obtained. It has been put to practical use by painting the marking film with the jet recording method. However, in the ink jet recording method, a pattern having a halftone is obtained because an image is formed by dots, and while it is considerably improved in terms of inexpensiveness and immediacy, at present, it has a low resolution and a small pattern or minute character expression. Is not suitable, the adhesion between the ink and the marking film is low, and the scratch resistance is poor. Furthermore, the weather resistance of the marking film recordings made is insufficient, and the ink nozzles are easily clogged and hard maintenance is required. However, there were drawbacks such as inconvenience in inspection.

Regarding the material constituting the marking film, JP-A-60-195146 discloses a semi-rigid vinyl chloride resin molding using a liquid polyester plasticizer and ethylene / vinyl ester resin as polyvinyl chloride resin. JP-A-63-24619 discloses a composition for molding a semi-rigid vinyl chloride resin using a liquid polyester plasticizer, a low molecular weight acrylic resin or a methacrylic resin in a polyvinyl chloride resin. However, all of them are intended to suppress the problems caused in the conventional fields of application such as flexibility, weather resistance, adhesive strength retention, and decrease in adhesiveness of printing ink due to bleeding out of the plasticizer. No application of the thermal transfer recording method as a patterning method, and further no suggestion of the receptive property of the thermal transfer ink. In addition, when we tried patterning by thermal transfer recording using these marking films as image receiving sheets, as described in the previous label and barcode fields, by using a thermal transfer ribbon containing wax in the conventional thermal transfer ink, Despite patterning, the marking film does not have the heat-sensitive property, so the adhesion of the thermal transfer ink to the marking film is extremely low, and it is extremely difficult to satisfy the adhesion, scratch resistance, scratch resistance, and weather resistance. could not.

[0010]

DISCLOSURE OF THE INVENTION The object of the present invention is to easily and inexpensively form a fine or complex character, a pattern, etc., which is rich in multicolor expression on an image-receiving sheet in an instant, and to obtain the obtained record. The object is to provide a recording method which can be used as a display member which has been conventionally patterned by cutting, silk screen printing, ink jet recording and the like.

[0011]

DISCLOSURE OF THE INVENTION The present invention provides an image-receiving sheet comprising a plastic film containing a heat-adhesive resin,
Alternatively, an image-receiving sheet having a heat-sensitive image-receiving layer containing a heat-adhesive resin as a main component on one surface of a plastic film,
Provided is a heat-sensitive transfer recording method of patterning using a heat-sensitive transfer material provided with a thermal transfer ink layer formed by sequentially laminating a release layer and a colored ink layer substantially composed of a colorant and a resin on a substrate.

In the thermal transfer recording method of the present invention, the thermal transfer ink layer of the thermal transfer material and the image-receiving sheet containing the thermal adhesive resin in the plastic film or the thermal sensitive material containing the thermal adhesive resin as a main component on the plastic film. The surface of the image-receiving sheet is melted and softened and transferred from the opposite side of the thermal transfer ink layer of the heat-sensitive transfer material using a heating means such as a thermal head in the state where the surface of the image-receiving sheet with the image-receiving layer is overlaid. An image of characters, patterns, etc. is directly formed on. That is, by incorporating a heat-adhesive resin that can be easily melted and softened by the amount of heat during heat-sensitive transfer recording into a plastic film, or by providing an image receiving layer containing the heat-adhesive resin as a main component on the surface of the plastic film, the heat transfer can be performed. The contact interface between the ink layer and the image-receiving sheet is easily heat-bonded by the amount of heat and pressure during heat-sensitive transfer recording, and an image-recorded material excellent in transferability and adhesion can be obtained.

According to the thermal transfer recording method of the present invention, an image such as a desired character or pattern can be formed at a low cost and in an instant manner by using a thermal transfer printer which is easy to maintain and has a resolution corresponding to the density of the heating elements of the thermal head. It is very useful because it can be obtained. Furthermore, by transferring multiple times with thermal transfer materials of different hues, it is possible to obtain a recorded material with excellent expressiveness in multiple colors, and to use it together with existing image forming means such as silk screen printing, or after thermal transfer recording. Of course, it is possible to cut and cut into an arbitrary shape, or to laminate the recording surface with a transparent plastic film.

Next, the components used in the recording method of the present invention will be described in detail. The image-receiving sheet used in the present invention contains a heat-adhesive resin in a plastic film, or is provided with a heat-sensitive transfer image-receiving layer containing a heat-adhesive resin as a main component on the plastic film. It is characterized by having excellent heat-sensitive transfer receiving characteristics for non-heat transfer ink.

As the plastic film, for example,
Examples thereof include films made of at least one resin selected from polyvinyl chloride resins, polyester resins, polyurethane resins, polyethylene, polypropylene, polystyrene, nylon, polyimide, polyvinyl resins, cellulose resins and the like. Among them, a film which is generally used as a marking film and has a thickness of 30 to 500 μm and made of at least one kind selected from polyvinyl chloride resin, polyester resin and polyurethane resin is preferable, and particularly, it has high flexibility and can be applied to a curved surface or a rough surface. A polyvinyl chloride resin film having excellent sticking suitability is suitable.

The polyvinyl chloride resin has a degree of polymerization of
300 to 2000, preferably 600 to 1500, polyvinyl chloride resin simple substance, and vinyl chloride, olefin type monomer, diene type monomer, vinyl halide type monomer,
Examples thereof include resins obtained by copolymerizing various monomers such as acrylic acid ester-based monomers, methacrylic acid ester-based monomers, vinyl ester-based monomers, vinyl ether-based monomers, and styrene-based monomers. More specifically, ethylene / vinyl chloride resin, vinyl chloride / vinyl acetate resin, ethylene / vinyl chloride / vinyl acetate resin,
Examples include urethane / vinyl chloride resin. In particular, polyvinyl chloride resins having a thermal softening temperature of 180 ° C. or less are recognized to contribute to the improvement of transfer adhesion of thermal transfer ink. The above polyvinyl chloride resins may be used alone or in combination.

Various known additives such as a plasticizer, a coloring agent, a heat stabilizer, an ultraviolet absorber, an antistatic agent, an antioxidant and a lubricant can be used in combination with the plastic film. As the plasticizer, basic carboxylic acid compounds such as phthalic acid, isophthalic acid, tetrahydrophthalic acid, adipic acid, sebacic acid, maleic acid, fumaric acid, trimellitic acid, oleic acid and monovalent or polyvalent alcohol compounds are used. Low molecular weight ester plasticizer, liquid polyester plasticizer,
Examples include alkyd liquid plasticizers and oxirane oxygen-containing epoxy plasticizers. As the coloring material, it is possible to use a colored organic pigment or inorganic pigment that has been used in conventional printing inks, or a colorless or white extender pigment for the purpose of imparting fluidity improvement, anchoring effect of thermal transfer ink, and the like. it can. Colored colorants are particularly preferable in order to obtain a recorded matter having a beautiful appearance as a marking film,
In addition, a white pigment is very preferable for normal recording and to enhance characters and patterns.

As the heat stabilizer, calcium stearate, barium stearate, lead stearate, basic lead sulfite, dibasic lead phosphite, dibutyltin dimalate, dibutyltin laurate, dibutyltin mercaptide, dioctyltin malate, Examples thereof include tin-based organic compounds such as dioctyl tin laurate, dioctyl tin mercaptide, and tin diol derivatives, and composites thereof. The ultraviolet absorber is a compound that absorbs light with a wavelength of 290 to 400 nm, and includes, for example, benzophenone type, benzotriazole type, salicylic acid phenyl ester type,
Examples thereof include cyanoacrylate-based compounds, cinnamic acid-based compounds, and aminobutadiene-based compounds. Also, as an ultraviolet blocking agent,
Examples thereof include fine particles of titanium oxide, zinc oxide, talc, kaolin, calcium carbonate, iron oxide and the like.

As the antistatic agent, polyoxyethylene alkylamine, polyoxyalkyl amide, polyoxyethylene alkyl ether, glycerin fatty acid ester, sorbitan fatty acid ester, alkyl sulfonate, alkyl benzene sulfonate, alkyl sulfate, alkyl phosphate, quaternary ammonium salt. Sulfate and the like can be mentioned, and the addition of these is particularly effective in preventing the adhesion of dust due to static electricity, which causes transfer failure in thermal transfer recording. Examples of the lubricant include liquid hydrocarbons such as liquid paraffin and polyethylene wax, fatty acid lubricants such as stearic acid and oxyfatty acid, fatty acid amides, natural or synthetic ester waxes, alcohol lubricants, etc. It is used for the purpose of improving the transportability of the film in the thermal transfer printer of the image-receiving sheet and improving the abrasion resistance of the surface of the image-receiving sheet within a range where there is no adverse effect.

Examples of the heat-adhesive resin include styrene / maleic anhydride copolymer, styrene / (meth) acrylic acid ester copolymer, polyvinyl chloride, polyvinyl acetate, vinyl chloride / vinyl acetate copolymer, polyethylene,
Polypropylene, polyacetal, ethylene / vinyl acetate copolymer, ethylene / (meth) acrylic acid ester copolymer, α-olefin / maleic anhydride copolymer,
Esterified products of α-olefin / maleic anhydride copolymer, polystyrene, polycaprolactone, poly (meth) acrylic acid ester, polyamide, epoxy resin,
Synthesis of xylene resin, ketone resin, petroleum resin, sucrose ester, rosin or its derivative, coumarone indene resin, terpene resin, polyurethane resin, styrene / butadiene rubber, polyvinyl butyral, nitrile rubber, acrylic rubber, ethylene / propylene rubber, etc. Rubber,
Examples thereof include polyester resins, cellulose derivatives, chlorinated polyolefins and the like, and if necessary, two or more kinds may be used in combination.

Among them, a resin which is a hard solid or does not have tackiness at room temperature is preferable, and such a resin generally has a glass transition temperature (hereinafter referred to as Tg) of -30 to 80 ° C, or a softening point or a melting point. It is in the range of 40 to 180 ° C. Further, a resin having Tg of −10 to 50 ° C. or a softening point or melting point of 50 to 150 ° C. is preferable. Tg lower than the range,
A resin having a softening point or a melting point generally exhibits tackiness or fluidity at room temperature, and the image-receiving sheet is apt to cause troubles such as blocking, which may change when the image-receiving sheet is used outdoors. Due to its nature, soot in the atmosphere is deposited and the surface is easily soiled. If the Tg, softening point or melting point is higher than the above range, the thermal sensitivity is low and the transferability is remarkably poor. As the type of resin, polycaprolactone (melting point about 60 ° C), which is represented by the following general formula (1) and has high crystallinity or partial crystallinity, crystalline polyester resin, epoxy resin, and sucrose ester have high thermal sensitivity. It is good because it has, and sucrose esters are particularly effective. (CH ₂ CH ₂ CH ₂ CH ₂ CH ₂ COO) _n (n represents the number of repetitions) General formula (1)

Particularly, sucrose octabenzoate (melting point 78 ° C.) and sucrose octaacetate (melting point 72 ° C.)
Is a hard solid at room temperature, does not have tackiness, and satisfies the thermal sensitivity important for thermal transfer with its sharp melting point and low melt viscosity similar to wax. Furthermore, it has weather resistance in sucrose octabenzoate. It also has the effect of improving the properties and is very suitable. Since sucrose octabenzoate ester has a slightly weak film-forming strength when used alone, it can be used more suitably when used in combination with another resin having a high film-forming strength. In this case, the proportion of sucrose octabenzoate is preferably 10 to 90% by weight, more preferably 30 to 90% by weight.

The image receiving sheet containing the heat adhesive resin will be described below. The image-receiving sheet containing a heat-adhesive resin in the plastic film contains 1 to 40 parts by weight, preferably 5 to 40 parts by weight of the heat-adhesive resin per 100 parts by weight of the resin exemplified in the plastic film. The resin composition thus obtained can be produced by forming a film by a known extrusion method, calendering method, solution casting method, sol casting method, semi-sol casting method or the like. Among them, since the resin composition contains a heat-adhesive resin,
A sol-cast method or a semi-sol-cast method that does not involve hot roll processing during film forming is suitable. In addition, in order to prevent sticking of the film when the image-receiving sheet is manufactured by a heat molding process such as a calendar method, or to secure appropriate flexibility required during construction when the image-receiving sheet is used as a marking film. It is preferable to contain the heat-adhesive resin in the range of 5 to 10 parts by weight.

When the image-receiving sheet is produced by a casting method using a coating solution such as polyvinyl chloride resin organosol or urethane resin solution, a heat-adhesive resin soluble in the organic solvent used is used, An insoluble substance cannot be used, but a partially swollen insoluble substance may be contained. For example, in the case of producing an image-receiving sheet containing a heat-adhesive resin in a vinyl chloride-based copolymer film using a casting method, first, a vinyl chloride-based copolymer resin, a heat-adhesive resin, a plasticizer, More suitable solvent,
For example, butanol, butyl acetate, ethylene glycol monomethyl ether acetate, diisobutyl ketone, xylol, cyclohexanone, aromatic petroleum naphtha, solvent naphtha, a solvent for sol in which a plurality of kinds of organic solvents such as trichlene are mixed, and the above-mentioned as necessary. On a support having releasability, such as a sol-like high-viscosity coating liquid in the form of a paste by mixing and stirring various additives, for example, a silicon-containing releasable process paper or a stainless steel plate whose surface has been release-treated. After casting, it is heated and melted under the conditions of about 160 to 220 ° C. for about 1 to 10 minutes to obtain an intended image receiving sheet having a thickness of 30 to 150 μm.

Further, in order to further improve the blocking resistance and the smoke pollution resistance, it is preferable to use one or more kinds of fluorine-containing compounds or silicon-modified resins in combination with the above heat-adhesive resin. As the fluorine-containing compound,
Graft polymer in which acrylic side chain is arranged on the main chain of fluororesin, fluorine-containing copolymer resin such as copolymer resin of polyfluoro group-containing vinyl monomer and other vinyl monomer, various fluorine-based surfactants, fluorine-containing Wax or the like is used. A silicone-modified resin is one in which a polyorganosiloxane is introduced into the main chain or side chain of a base polymer. Among them, a silicone-modified polyurethane resin having a polyorganosiloxane chain in the main chain, or a silicon-modified silicone having a polyorganosiloxane chain in the side chain. Acrylic resins are preferred. The fluorine-containing compound or the silicon-modified resin can be added in the range of 1 to 50% by weight in the heat-adhesive resin component depending on the type, but 5 to 30% by weight is preferable.

Next, an image-receiving sheet having a heat-sensitive image-receiving layer containing a heat-adhesive resin as a main component on one surface of a plastic film will be described. The heat-sensitive image-receiving layer contains the above heat-adhesive resin as a main component, but if necessary, the above-mentioned various additives,
For example, it contains a plasticizer, a coloring material, an ultraviolet absorber, an antistatic agent and the like. Further, in order to improve the blocking resistance and the smoke pollution resistance, a fluorine-containing compound or a silicon-modified resin is used in an amount of 1 to 50% by weight, preferably 5% by weight in the heat-adhesive resin component.
It can be used together in the range of up to 30% by weight. In order to improve outdoor weather resistance and smoke pollution resistance, Tg of -30 to 30 ° C or softening point or melting point of 40 on a plastic film.
A first image-receiving layer containing a heat-adhesive resin having a temperature of -80 ° C as a main component and having a high thermal sensitivity is provided, and a heat-adhesive resin having a Tg of 30-80 ° C or a softening point or melting point of 80-180 ° C A second image-receiving layer containing, as a main component, or a heat-adhesive resin containing a fluorine-containing compound or a silicon-modified resin and having excellent weather resistance and stain resistance may be sequentially laminated. The second image receiving layer, which is the outermost layer, does not reduce the transfer receptivity,
It is preferably as thin as possible, preferably about 0.5 μm or less, and more preferably 0.1 μm or less.

As a means for providing the image receiving layer on one surface of the plastic film, a solvent coating method in which a composition for forming the image receiving layer is dissolved or dispersed in an organic solvent or water and then dried, and then the image receiving layer is applied. The hot-melt coating method in which the composition constituting the above is melted by heating and coated is exemplified. The thickness of the heat-sensitive image-receiving layer is preferably 0.1 to 10 μm, more preferably 0.2 to 2 μm.

In any of the image-receiving sheets used in the present invention, an adhesive such as an acrylic adhesive, a urethane adhesive, a rubber adhesive, a silicon adhesive or the like is provided on the back side of the surface patterned by the heat-sensitive transfer material. Can be provided with a thickness of 10 to 200 μm, and an adhesive release base material can be further laminated. Adhesive strength is usually 10 depending on the material and surface condition of the adherend.
Uses an adhesive with a width of 00 to 2000 gr / 25 mm (JIS-Z0237 adhesive tape / adhesive sheet test method), with an adhesive strength of 50 to 50
By setting the width to 1000 gr / 25 mm, preferably 500 to 900 gr / 25 mm width, the used pasted display recording material does not leave unnecessary adhesive on the surface of the adherend, and It is possible to impart re-peeling easiness that allows easy peeling without requiring a peeling force that exceeds the breaking strength.

The heat-sensitive transfer material used in the present invention comprises a base material on which a release layer and a colored ink layer are laminated in that order as a heat transfer ink layer. Since the colored ink layer improves properties such as weather resistance, adhesion, and scratch resistance, it does not contain waxes that adversely affect these properties, and is substantially composed of a resin and a colorant. An adhesive layer substantially made of resin may be provided on the colored ink layer for the purpose of further improving transfer adhesion.

As the substrate, films of polyester (polyethylene terephthalate, polyethylene naphthalate, etc.), polyamide (nylon, etc.), polyolefin (polypropylene, etc.), cellulose (triacetate, etc.), polycarbonate, etc., which have excellent heat resistance and mechanical strength, can be used. Can be mentioned. The polyester film is particularly preferable because it is excellent in heat resistance, mechanical strength, tensile strength, and tensile stability.
The thinner the base material, the better the thermal conductivity, but it is preferably 3 to 50 μm because of its strength and ease of coating the thermal transfer ink layer.
μm is more preferable. A back coat layer made of a heat resistant resin may be provided on the surface of the substrate opposite to the thermal transfer ink layer.

The release layer of the thermal transfer ink layer is a plant type,
Consists of waxes such as animal-based, mineral-based, petroleum-based natural waxes, synthetic waxes, higher fatty acids, higher fatty acid derivatives, and resins, and other conventionally known pigment dispersants, antistatic agents, plasticizers, and ultraviolet absorbers. You may add various additives, such as these, as needed. When a colorant is added to reinforce the concentration of the colored ink layer, the amount of addition is 0% of the solid content.
~ 10 wt% is preferred. Various additives such as an antistatic agent, a plasticizer, and an ultraviolet absorber can be the same as those used in the image-receiving sheet. In order to improve the outdoor weather resistance of the transferred recorded matter, the ultraviolet absorber and / or the ultraviolet shield are used. It is preferable to include an agent. The addition amount of the ultraviolet absorber and / or the ultraviolet blocker is preferably 1 to 10% by weight based on the solid content.

Further, in order to improve the surface strength of the recorded portion of the transferred recorded matter, it is preferable to use a thermoplastic resin emulsion having a minimum film forming temperature of 70 ° C. or higher as a main component. Usually, the surface weight can be increased by increasing the resin / wax weight ratio, but since the film forming strength is increased, the sharpness at the time of transfer, that is, the resolution is lowered. However, when a thermoplastic resin emulsion having a minimum film forming temperature of 70 ° C. or higher is used, the emulsion particles do not form a film under the drying temperature condition in the step of forming a normal peeling layer, so that the resin is the main component and the sharpness at the time of transfer is good. In addition, since the emulsion particles are partially melt-bonded to each other by heating at a high temperature by the thermal head during transfer, the surface strength of the recording portion is improved.
In this case, the resin / wax weight ratio of the release layer is preferably 1-9, more preferably 2-9. Since the thermoplastic emulsion has no film-forming property under the drying condition of the minimum film-forming temperature or less, it is preferable to use another thermoplastic resin emulsion having a minimum film-forming temperature near room temperature as a binder, and the total amount of the resin emulsion is added. It is preferably 1 to 50% by weight in the resin content. The thickness of the release layer is preferably 0.1 to 3 μm, because transferability decreases if it is extremely thin, and transfer release property decreases if it is extremely thick, and 0.3 to 2 μm
m is more preferred.

The colored ink layer is substantially composed of a resin and a coloring material such as an organic pigment and an inorganic pigment. When waxes are contained in the colored ink, it contributes to the thermal sensitivity at the time of transfer, but in a high temperature environment of the recorded material (about 40 ° C
(Around), especially, scratch resistance and adhesion. When the content of waxes in the colored ink is about 5% by weight, the resistance is slightly reduced as compared with the case where no wax is contained, and when it is about 20% by weight, the resistance is obviously reduced and the abrasion resistance is particularly remarkable. If it is 50% by weight or more, the resistance is significantly reduced. The decrease in thermal sensitivity due to the fact that the colored ink layer does not contain waxes can be sufficiently compensated by the image-receiving sheet having the heat-sensitive property.

The colorant / resin weight ratio of the colored ink layer particularly affects the undercoat hiding property, the color density, and the sharpness at transfer, that is, the resolution, and in order to satisfy these, 0.4 to 4 in the case of an organic pigment. Preferably, 1-2 are more preferable. In the case of inorganic pigments, the specific gravity is large, so 0.6 to 6 is preferable,
1 to 4 is more preferable. When it is less than the range, the hiding property and the color density are lowered, and the film forming strength of the colored ink layer is increased to lower the resolution. If it is larger than the above range, the adhesion and abrasion resistance are deteriorated. However, in the case of using in the full color system in which the three primary colors of yellow, magenta, and cyan are expressed by halftone dots, the transparency of each color must be taken into consideration. Therefore, in the case of an organic pigment, 0.4 to 2 is more preferable, In the case of a pigment, the specific gravity is large, so 0.6 to 3 is more preferable. Various conventionally known additives such as a pigment dispersant may be added to the colored ink layer as long as the solid content ratio is 5% by weight or less. The thickness of the colored ink layer is preferably 0.3 to 5 μm, more preferably 0.5 to 3 μm.

On the colored ink layer, an adhesive layer substantially made of resin may be provided for the purpose of further improving transfer adhesion. A coloring material such as a pigment, a dye or an extender pigment may be added to the adhesive layer in a solid content ratio of 20% by weight or less for the purpose of supplementing the hiding power and coloring power of the colored ink layer. In addition, various other conventionally known additives may be added within the range of 5% by weight or less in terms of solid content. If added in excess of this range, the adhesiveness of the transfer layer may not be improved.

As the resin used for the thermal transfer ink layer, for example, polyvinyl acetate, vinyl chloride / vinyl acetate copolymer, polyethylene, polypropylene, polyacetal,
Ethylene / vinyl acetate copolymer, ethylene / (meth) acrylic acid copolymer, α-olefin / maleic anhydride copolymer, esterified product of α-olefin / maleic anhydride copolymer, polystyrene, poly ( (Meth) acrylic acid ester, α-olefin / maleic anhydride / vinyl group-containing monomer copolymer, styrene / maleic anhydride copolymer, styrene / (meth) acrylic acid ester copolymer, polyamide, epoxy resin, xylene resin , Ketone resin, petroleum resin, rosin or its derivatives, coumarone indene resin, terpene resin, polyurethane resin, styrene / butadiene rubber, polyvinyl butyral, nitrile rubber, acrylic rubber, synthetic rubber such as ethylene / propylene rubber, polyester resin, nitro Cellulose, cellulose derivatives, Ester and the like.

The resin used for the colored ink layer and the adhesive layer includes an α-olefin having 6 or more carbon atoms / maleic anhydride / (meth) acrylic acid ester copolymer, and sucrose octa which is a kind of sucrose ester. Benzoic acid ester or sucrose octaacetate ester is particularly preferable because of its excellent heat-sensitive properties.

The colorant used in the colored ink layer includes carbon black, iron oxide black, aniline black, titanium oxide, phthalocyanine series, monoazo series, disazo series, nitro series, nitroso series, perylene series,
Materials such as dyes such as isoindolinone-based and quinacridone-based pigments, azo-based, anthraquinone-based, and nigrosine-based dyes that are commonly used in paints and inks are included, but pigments are particularly preferred to obtain a transfer product with good fading properties. Is preferred. Among them, carbon black, fast yellow, cadmium yellow, iron oxide yellow, iron oxide black, chromophthal yellow, anthrapyrimidine yellow, isoindolinone yellow, nickel azo yellow, copper azomethine yellow, benzimidazolone yellow, quinophthalone yellow, nickel dioxin. Yellow, flavanthlon yellow, yellow lead, titanium yellow,
Disazo Yellow, Benzimidazolone Orange, Pyranthrone Orange, Perinone Orange, Para Red, Lake Red, Naphthol Red, Pyrazolone Red, Permanent Red, Madele Lake, Thioindigo Bordeaux, Bengala, Red Lead, Cadmium Red, Quinacridone Magenta, Perylene Vermillion , Perylene red, chromophthal scarlet, anthanthrone red, dianthraquinolyl red, perylene maroon, benzimidazolone carmine, perylene scarlet, quinacridone red, pyranthrone red, manganese violet, dioxazine violet, phthalocyanine blue, navy blue, Cobalt blue, ultramarine blue, indanthrone blue, phthalocyanine green, pigment green,
Chromium oxide, viridian, benzimidazolone brown, bronze powder, lead white, zinc white, lithopone, titanium oxide and pearl pigment are preferred.

To provide the base material with the thermal transfer ink layer, a coating method generally used, that is, a hot melt coating method, or more preferably, a gravure coating method is used.

[0040]

The present invention will be described in more detail with reference to the following examples. As thermal transfer recording materials used in Examples and Comparative Examples, an image receiving sheet, a thermal transfer material, and an image recording method using a thermal transfer printer will be described in order, and Examples and Comparative Examples of thermal transfer recording methods using these will be described. In the examples, “part” represents “part by weight”.

<Image Receiving Sheet A> Of the following film raw materials, titanium oxide and a plasticizer are mixed in advance and then thoroughly mixed and kneaded with a three-roll to form a colored paste. next,
Prepare a resin solution in which a heat-adhesive resin, a heat stabilizer, an ultraviolet absorber, and a lubricant are previously dissolved in a solvent, and the total solid content of both of the following vinyl chloride resin powder and the colored paste prepared above is approximately A sol paste was obtained by appropriately adding 60% so as to stir well with a disper while cooling. Then, after thoroughly degassing the sol paste, apply it to the release paper with an applicator so that the thickness after drying will be about 100 μm.
A resin film was prepared by sufficiently drying with warm air. Next, 100 μm thick paper with polyethylene laminated on both sides, one side of which has been treated with a release agent, is mixed with the adhesive material shown below and stirred thoroughly. Adhesive strength of 1200gr / 25mm width (JIS-Z0237 adhesive tape / adhesive sheet test method), 65 ° C, 80% RH after 168 hours, adhesive strength of 1500gr / 25mm width after 168 hours. It was coated at 25 gr / m ² and dried at 100 ° C. for 2 minutes, and laminated on one side of the film prepared above to prepare an image-receiving sheet A with an adhesive.

-Film- Titanium oxide (“Taipec CR80” manufactured by Ishihara Sangyo) 30 parts Liquid polyester plasticizer (“Adeka Sizer PN260” manufactured by Asahi Denka Co., Ltd.) 20 parts Liquid phthalate ester plasticizer (“DOP” manufactured by Chisso) 15 Part Thermal adhesive resin ("JONCRYL611" made by Johnson Polymer, softening point 105 ° C, styrene-acrylic resin) 20 parts Heat stabilizer (Katsuda Kako "BZ100C") 3 parts UV absorber (Ciba Geigy "Tinuvin 326") 2 parts Solvent (xylene / diisobutylketone = 1/1) 284 parts Vinyl chloride resin (“Zeon 24” manufactured by Nippon Zeon, degree of polymerization 1300) 100 parts Lubricant (stearyl alcohol) 1 part-Adhesive-Acrylic adhesive (Toyo Ink production "Olivine BPS4089B") 100 parts Isocyanate curing agent (Toyo Ink production "Olivine BHS4089B") 0.87

<Image-Receiving Sheet B> Among the film raw materials of the image-receiving sheet A, the heat-adhesive resin was changed from styrene-acrylic resin “JONCRYL611” to sucrose octabenzoate (“Monopet SB” manufactured by Daiichi Kogyo Seiyaku Co., Ltd., melting point 78). Except that the temperature was changed to 0.degree. C.) and the pressure-sensitive adhesive-coated image-receiving sheet B was prepared in the same manner as in the production method and pressure-sensitive adhesive processing.

<Image Receiving Sheet C> Of the following film raw materials, titanium oxide and a plasticizer are pre-kneaded with a two-roll mill, and then the following heat-adhesive resin, stabilizer, ultraviolet absorber, vinyl chloride resin, lubricant Was added and kneaded well while heating and melting, and this was rolled by a calender roll under heating conditions to a thickness of about 100 μm to obtain a resin film. Then, on the same release paper as that used for the image-receiving sheet A, the following materials were sufficiently mixed and stirred to obtain removability, and the initial adhesive force was 500 gr / 25 mm width (JIS-Z0237 adhesive Tape / Adhesive sheet test method), 65 ℃, 80% RH 1
Apply the adhesive with a aging adhesive strength of 750 gr / 25 mm width after 68 hours so that the coating amount after drying will be 25 gr / m ² , and dry it sufficiently with warm air. Then, an image-receiving sheet C with an adhesive was prepared by laminating it with the surface of No.

-Film-Titanium oxide ("Taipec CR80" manufactured by Ishihara Sangyo) 30 parts Vinyl chloride resin ("Zeon 24" manufactured by Nippon Zeon, degree of polymerization 1300) 100 parts Thermal adhesive resin ("Byron 103" manufactured by Toyobo Co., Ltd., Softening point 158 ° C, saturated polyester resin 20 parts Liquid polyester plasticizer (Adeka Sizer PN260 made by Asahi Denka Co., Ltd.) 20 parts Liquid phthalate ester plasticizer (Chisso "DOP") 15 parts Heat stabilizer (Katsuda Kako) "BZ100C") 3 parts UV absorber (Ciba Geigy "Tinuvin 326") 2 parts Lubricant (stearyl alcohol) 1 part-Adhesive-Acrylic adhesive ("Olivine BPS4294" manufactured by Toyo Ink) 100 parts Isocyanate curing Agent (Toyo Ink Mfg. "Olivine BHS4089B") 2 parts

<Image Receiving Sheet D> A coating liquid for casting prepared by sufficiently dispersing and mixing the following raw materials in a ball mill was coated on a release paper with an applicator so that the thickness after drying was about 100 μm, and then heated with warm air. And sufficiently dried to prepare an image receiving sheet D. -Film- Titanium oxide ("Taipec CR80" manufactured by Ishihara Sangyo) 30 parts Phthalocyanine blue ("Rionol Blue FG7351" manufactured by Toyo Ink Manufacturing) 1 part Polyurethane resin (dicyclohexylmethane diisocyanate / polyhexamethylene carbonate diol (Mw1000) / propylene glycol / Isophorone diamine = 4/1/1/1 (molar ratio)) 100 parts Thermal adhesive resin ("Byron 103" made by Toyobo, softening point 158 ° C, saturated polyester resin) 20 parts UV absorber (made by Ciba Geigy " Tinuvin 326 ") 2 parts Lubricant (stearyl alcohol) 1 part Solvent (cyclohexanone / diisobutylketone = 2/1) 400 parts

<Image-Receiving Sheet E> The following image-receiving layer raw materials were completely mixed and dissolved, and then a commercial white polyurethane resin film substrate having a thickness of 80 μm was dried with a bar coater so that the film thickness after drying would be 0.5 μm. It was applied and dried sufficiently with warm air. Subsequently, the same pressure-sensitive adhesive processing as that of the image-receiving sheet C was performed to prepare an image-receiving sheet E with a pressure-sensitive adhesive. -Image-receiving layer-Heat-adhesive resin (Sumitomo Bayer Urethane "Desmocol 530", softening point 85 ° C, polyurethane resin) 10 parts UV absorber (Ciba Geigy "Tinuvin 326") 2 parts Solvent (toluene / methyl isobutyl ketone = 5/1) 88 copies

<Image-Receiving Sheet F> A commercially available transparent vinyl chloride resin film having a thickness of 80 μm was used in place of the white polyurethane resin film, and an adhesive was provided in the same manner as in the image-receiving sheet E except that the raw materials for the image-receiving layer were changed as follows. Image receiving sheet F
It was created. The Tg of the heat adhesive resin mixture was 42 ° C. -Image Receptive Layer-Heat Adhesive Resin (TOYOBO "Byron 130", Tg15 ° C, polyester resin) 5 parts Heat Adhesive Resin (Daiichi Kogyo Seiyaku "Monopet SB", melting point 78 ° C, sucrose octabenzoate) Aromatic ester) 5 parts Solvent (toluene / methyl isobutyl ketone = 5/1) 90 parts

<Image-Receiving Sheet G> The following image-receiving layer raw materials were completely mixed and dissolved, and then a commercially available white polyethylene terephthalate (PET) film substrate having a thickness of 100 μm was coated with a bar coater so that the film thickness after drying would be 1 μm. And was dried sufficiently with warm air to prepare an image receiving sheet G. -Image-receiving layer-Thermal adhesive resin ("Placcel H7" manufactured by Daicel Chemical Industries, melting point 60 ° C, polycaprolactone) 10 parts Solvent (toluene / methyl isobutyl ketone = 5/1) 90 parts

<Image-Receiving Sheet H> The following image-receiving layer raw materials were completely dissolved in an organic solvent and then dried on a commercially available white vinyl chloride resin film substrate having a thickness of 100 μm to give a thickness of 0.3 μm.
Was coated with a bar coater so as to be sufficiently dried with warm air to prepare an image receiving sheet H. -Image-receiving layer-Heat adhesive resin ("Byron 600" manufactured by Toyobo Co., Ltd., Tg 47 ° C, polyester resin) 20 parts Solvent (toluene / methyl ethyl ketone = 1/1) 80 parts

<Image Receiving Sheet I> An intended image receiving sheet I was prepared in the same manner as the image receiving sheet G except that the raw materials for the image receiving layer were changed as follows. The Tg of the heat-adhesive resin mixture was 18 ° C. -Image-receiving layer-Heat adhesive resin ("Byron 650" manufactured by Toyobo, Tg 14 ° C, polyester resin) 15 parts Silicon modified urethane resin ("Dialomer SP2105" manufactured by Dainichiseika Kogyo, softening point 95 ° C) 5 parts Solvent (toluene) / Methyl ethyl ketone = 1/1) 80 parts

<Image Receiving Sheet J> An intended image receiving sheet J with an adhesive was prepared in the same manner as the image receiving sheet E except that the raw materials for the image receiving layer were changed as follows. The softening point of the heat-adhesive resin mixture was 150 ° C. -Image-receiving layer-Heat adhesive resin (TOYOBO "Byron 103", softening point 155 ° C, polyester resin) 6 parts Fluorine-based copolymer resin (Asahi Glass "FT-1030", softening point 95 ° C) 2 parts Phthalocyanine Blue (Toyo Ink Manufacturing "Rionol Blue FG7351") 2 parts Solvent (toluene / methyl ethyl ketone = 1/1) 90 parts

<Image-Receiving Sheet K> The following image-receiving layer raw materials (1) were completely mixed and dissolved, and then dried on a commercially available white vinyl chloride resin film substrate having a thickness of 100 μm to a thickness of 0.5 μm. It was applied with a bar coater and dried sufficiently with warm air. Further, an image-receiving sheet K was prepared by further coating and drying a material prepared by completely mixing and dissolving the following image-receiving layer raw material (2) so that the film thickness after drying would be 0.1 μm. -Image-receiving layer (1) -Heat adhesive resin ("Byron 500" manufactured by Toyobo, Tg 4 ° C, polyester resin) 20 parts Solvent (toluene / methyl ethyl ketone = 1/1) 80 parts-Image-receiving layer (2) -Heat bonding Resin (Voylon 200, manufactured by Toyobo Co., Ltd., Tg 67 ° C., polyester resin) 10 parts Solvent (toluene / methyl ethyl ketone = 1/1) 90 parts <Image Receiving Sheet L> The following image receiving layer raw materials (1) were completely mixed and dissolved. Then, it was applied to a commercially available white polyurethane resin film substrate having a thickness of 70 μm by a bar coater so that the film thickness after drying would be 0.5 μm, and sufficiently dried with warm air. Further, an image-receiving sheet L was prepared by further coating and drying the following image-receiving layer raw material (2), which was completely mixed and dissolved, so that the film thickness after drying was 0.1 μm. The softening point of the resin mixture used for the heat-sensitive image-receiving layer (2) was 150 ° C. -Image-receiving layer (1) -Heat adhesive resin ("Chemit R99" manufactured by Toray, Tg-19 ° C, polyester resin) 15 parts Solvent (toluene / methyl ethyl ketone = 1/1) 85 parts-Image-receiving layer (2) -Heat bonding Resin (Voylon 103 manufactured by Toyobo, softening point 158 ° C, polyester resin) 10 parts Silicon modified urethane resin ("Dialomer SP2105" manufactured by Dainichi Seika Kogyo, softening point 95 ° C) 5 parts Solvent (toluene / methyl ethyl ketone = 1/1) 85 copies

<Image Receiving Sheet M for Comparison> Commercially Available Thickness 100
An image receiving sheet M was obtained by subjecting a white vinyl chloride resin film having a thickness of μm to the same adhesive processing as the image receiving sheet A.

<Heat-sensitive transfer material 1> A release layer coating solution prepared by thoroughly dispersing and mixing release layer raw materials having the following composition in a ball mill was used, and a heat-resistant back coat layer was provided on one side of the coating liquid.
The polyethylene terephthalate film was coated on the surface opposite to the back coat layer by a gravure coating method so that the film thickness after drying was 1 μm. Further, a coating solution for a colored ink layer, which was obtained by sufficiently dispersing and mixing the following raw materials for a colored ink layer on a release layer with a sand mill, had a film thickness after drying by a gravure coating method of 1 μm as in the previous case. A thermal transfer material 1 was prepared by coating the above to provide a colored ink layer. -Release layer-Ethylene-vinyl acetate copolymer resin ("Evaflex V577" manufactured by Mitsui DuPont Polychemical) 3 parts Carnauba wax 22 parts Toluene 50 parts Isopropyl alcohol 25 parts-Colored ink layer-Polyester resin (Toyobo "Byron 200" )) 4 parts Sucrose octabenzoate (“Monopet SB” manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) 6 parts Carbon black 10 parts Dispersant 0.5 parts Toluene 40 parts Methyl ethyl ketone 40 parts

<Heat-sensitive transfer material 2> A heat-sensitive transfer material 2 was prepared in the same manner as the heat-sensitive transfer material 1, except that the raw material of the release layer was changed to the following composition. -Release layer- Acrylic resin emulsion (minimum film formation temperature 75 ° C, solid content 20%) 85 parts Acrylic resin emulsion (minimum film formation temperature 15 ° C, solid content 20%) 5 parts Carnauba wax emulsion (solid content 20%) 10 Department

<Heat-sensitive transfer material 3> Heat-sensitive transfer material 1 except that the raw materials for the release layer and the colored ink layer were changed to the following compositions.
A thermal transfer material 3 was prepared in the same manner as in. -Release layer- Polyvinyl butyral resin (Sekisui Chemical's "ESREC BLS") 5 parts Rice wax 15 parts Toluene 50 parts Isopropyl alcohol 30 parts-Colored ink layer-Polyester resin (Toyobo "Byron 200") 15 parts Carbon black 15 Part Toluene 35 parts Methyl ethyl ketone 35 parts

<Heat-sensitive transfer material 4> A heat-sensitive transfer material 4 was prepared in the same manner as the heat-sensitive transfer material 1 except that the raw material for the colored ink layer was changed to the following composition. -Colored ink layer- Acrylic resin (Mitsubishi Rayon's "Dianal BR64") 7 parts Sucrose octabenzoate (Daiichi Kogyo Seiyaku's "Monopet SB") 3 parts Carbon black 10 parts Dispersant 0.5 parts Toluene 40 parts Methyl ethyl ketone 40 parts

<Heat-sensitive transfer material 5> A heat-sensitive transfer material 5 was prepared in the same manner as the heat-sensitive transfer material 1 except that the raw material for the colored ink layer was changed to the following composition. -Colored ink layer-1-hexadecene / maleic anhydride / butyl methacrylate copolymer resin (molar ratio = 1/1/1, Mw = 50000) 12 parts carbon black 8 parts dispersant 0.5 parts methyl isobutyl ketone 40 parts methyl ethyl ketone 40 copies

<Heat-sensitive transfer material 6> A heat-sensitive transfer material 6 was prepared in the same manner as the heat-sensitive transfer material 1 except that the raw material of the colored ink layer was changed to the following composition. -Colored ink layer-Polyester resin ("Chemit SQ1370" manufactured by Toray) 8 parts Carbon black 12 parts Dispersant 0.1 part Toluene 40 parts Methyl ethyl ketone 40 parts

<Heat-sensitive transfer material 7> A heat-sensitive transfer material 7 was prepared in the same manner as the heat-sensitive transfer material 1 except that the raw material for the colored ink layer was changed to the following composition. -Colored ink layer- Styrene acrylic resin ("Acrybase MH7025" manufactured by Fujikura Kasei) 10 parts Azo pigment ("Rionol Red CP-A" manufactured by Toyo Ink Manufacturing) 20 parts Toluene 35 parts Methyl ethyl ketone 35 parts <Thermal transfer material 8> On the colored ink layer of the thermal transfer material 1,
An adhesive layer coating liquid having the following composition was applied by a gravure coating method so as to have a thickness after drying of 0.5 μm to form an adhesive layer, thereby preparing a thermal transfer material 8. -Adhesive layer- 1-hexadecene / maleic anhydride / butyl methacrylate copolymer resin (molar ratio = 1/1/1, Mw = 50,000) 10 parts Toluene 45 parts Methyl ethyl ketone 45 parts

<Thermal Transfer Material 9> On the colored ink layer of the thermal transfer material 2, an adhesive layer coating liquid having the following composition was applied by a gravure coating method so that the thickness after drying was 0.5 μm. Then, an adhesive layer was provided to prepare a thermal transfer material 9. -Adhesive layer-Polyester resin (Toyobo "Byron 103") 4 parts Sucrose octabenzoate (Daiichi Kogyo Seiyaku "Monopette SB") 6 parts Toluene 45 parts Methyl ethyl ketone 45 parts

<Thermal Transfer Material 10 for Comparison> A thermal transfer material 10 was prepared in the same manner as the thermal transfer material 1 except that the raw material for the colored ink layer was changed to the following composition. -Colored ink layer- Terpene resin (Yasuhara Yushi Kogyo "Polystar T100") 5 parts Carnauba wax 12 parts Carbon black 3 parts Dispersant 0.1 parts Toluene 80 parts

<Thermal transfer material 11 for comparison> A thermal transfer ink composition prepared by sufficiently dispersing and mixing the following raw material for a thermal transfer ink layer with three rolls while heating and melting, was provided with a heat-resistant back coat layer on one side. A heat-sensitive transfer material 11 was prepared by coating a polyethylene terephthalate film having a thickness of 4.5 μm on the surface opposite to the back coat layer by a hot melt coating method so as to have a thickness of 3 μm. -Thermal transfer ink layer-Ethylene-vinyl acetate copolymer resin ("Evaflex V577" manufactured by Mitsui DuPont Polychemical) 5 parts Carbon black 25 parts Paraffin wax (melting point 155 ° F) 70 parts

<Thermal Transfer Material 12 for Comparison> A thermal transfer material 12 was prepared in the same manner as the thermal transfer material 1 except that the raw material of the colored ink layer was changed to the following composition. -Colored ink layer-Polyurethane resin (Sumitomo Bayer Urethane "Desmocol 530") 16 parts Carbon black 4 parts Dispersant 0.1 part Toluene 40 parts Methyl ethyl ketone 40 parts

<Thermal Transfer Recording Method> Various combinations of the prepared image-receiving sheet and thermal transfer material were used, and thermal transfer recording was performed using a thermal transfer copying machine (“Palette EC-10” manufactured by Fuji Xerox).

<Combination of image-receiving sheet and thermal transfer material of Examples and Comparative Examples>

<Evaluation of Various Durability of Recorded Products According to Examples and Comparative Examples> Outdoor weather resistance, scratch resistance, scratch resistance, adhesion and re-peeling of image-receiving sheets of the recorded products obtained in Examples and Comparative Examples. The sex was evaluated by the following method. The results are shown in Table 1. Outdoor weather resistance: The recorded matter was mounted on an outdoor exposure test stand facing south at an angle of 45 ° to the horizon and exposed for 6 months for evaluation. Scratch resistance: Gakushin type dyeing fastness test (JIS L-082
It was evaluated according to 3). Scratch resistance: The recording portion was evaluated by a pencil hardness test (JIS K-5401). Adhesion: Cellophane tape (Nichiban "18"
mm width cellophane tape ") was attached and peeled off in an instant, and the degree of removal of the recording portion to the tape side was evaluated. Removability: The recorded material is attached to a stainless steel plate with a smooth surface and pressure-bonded with a 2 kg roller. This is 65 ℃, 80% R
Removed after standing in H environment for 168 hours, then 23 ℃, 65
After being left in an environment of% RH for 24 hours, the recorded matter was peeled off by hand, and the presence or absence of residual adhesive on the stainless plate was evaluated.

[0069]

[Table 1] Note) ○: Good ○ △: Fairly good △: Normal △ ×: Fairly bad ×: Bad

[0070]

According to the thermal transfer recording method of the present invention, it is possible to easily form highly colored images of characters, patterns, etc., and therefore, it is possible to immediately produce inexpensively without complicated processing steps. The patterning process with high property can be easily realized.
Further, the image-recorded material obtained by the present invention is excellent in adhesiveness and scratch resistance, and therefore, as a label, of course,
It is practical enough to be used as a marking film or various display items.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Motohiko Kashiwaoka 2-33 Kyobashi, Chuo-ku, Tokyo Toyo Inki Manufacturing Co., Ltd.

Claims (11)

[Claims] 1. An image-receiving sheet comprising a plastic film containing a heat-adhesive resin, or an image-receiving sheet having a heat-sensitive image-receiving layer containing a heat-adhesive resin as a main component on one surface of a plastic film, A heat-sensitive transfer recording method, which comprises patterning using a heat-sensitive transfer material obtained by sequentially laminating a release layer and a colored ink layer substantially composed of a resin and a colorant on the material. 2. The glass transition temperature of the heat-adhesive resin is -30 to 80.
The heat-sensitive transfer recording method according to claim 1, wherein the temperature is ° C. 3. The softening point or melting point of the heat-adhesive resin is 40-18.
The thermal transfer recording method according to claim 1, wherein the temperature is 0 ° C. 4. The plastic film is made of at least one selected from polyvinyl chloride resins, urethane resins and polyester resins.
4. The heat-sensitive transfer recording method according to any one of 3 to 3. 5. The heat-sensitive transfer recording method according to claim 1, wherein a part or all of the heat-adhesive resin is sucrose benzoate. 6. The thermal transfer recording method according to claim 1, wherein a part or all of the heat-adhesive resin is polycaprolactone having a structure represented by the following general formula (1). (CH ₂ CH ₂ CH ₂ CH ₂ CH ₂ COO) _n (n represents the number of repetitions) General formula (1) 7. The thermal transfer recording method according to claim 1, wherein the thermal transfer ink layer contains sucrose benzoate. 8. The heat-sensitive transfer recording method according to claim 1, wherein the image-receiving sheet has a release base material on the back side of the surface patterned by the heat-sensitive transfer material with an adhesive layer interposed therebetween. 9. The adhesive strength of the adhesive layer is 50 to 1000 gr / 25 in the JIS-Z0237 adhesive tape / adhesive sheet test method.
The thermal transfer recording method according to claim 8, wherein the thermal transfer recording method has a width of mm. 10. The thermal transfer recording method according to claim 1, wherein an adhesive layer substantially made of resin is further laminated on the colored ink layer of the thermal transfer material. 11. An adhesive layer containing a resin obtained by copolymerizing sucrose benzoate and / or α-olefin having 6 or more carbon atoms, maleic anhydride and (meth) acrylic acid ester. The thermal transfer recording method according to claim 10.