JP2002036795A - Method for painting transfer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain good adhesiveness between an object to be transferred and a surface receiving the transferred object, and prevent a damage of a surface painted out of a surface of an object to be transferred by excessive transfer strength during peeling operation of a base material sheet in transfer operation of an image receiving layer accompanying the image for the object to be transferred. SOLUTION: A heat-sensitive transfer recording sheet A is provided with a peelable heat-sensitive transfer image layer 2 based on a pigment and a resin on a single surface of its base material sheet 1. The image layer 2 is superposed on an image receiving layer 13 of an intermediate transfer sheet B which builds up at least a peeling protection layer 12 and an image receiving layer 13 in this order on a single surface of a supporting body 11, and heated for transfer. Thus, a transferred image 14 is formed on the image receiving layer 13 from the image layer 2. Next, after the image receiving layer 13 of the intermediate transfer sheet B is superposed on a surface of an object C to be transferred and heated for adhesion, the supporting body 11 of the intermediate transfer sheet B is peeled off the peeling protection layer 12. Transfer painting is performed in this arrangement.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer painting method using a thermal transfer method for painting an image such as a picture on a surface of a transfer object.

[0002]

2. Description of the Related Art In a conventional thermal transfer recording method using a thermal transfer recording sheet (thermal transfer recording medium) having a thermal transfer image layer (thermal transfer ink layer) on a base sheet,
Instead of directly transferring the image from the thermal transfer recording sheet to the target transfer object, the image formed of the thermal transfer image layer is transferred to the image receiving layer of the intermediate transfer sheet (intermediate transfer medium), and then the image ( A method of retransferring a heat-sensitive transfer image layer) together with an image receiving layer to a target transfer object is known. Hereinafter, this is referred to as a retransfer method.

[0003] Using this method, plastic cards such as cash cards, credit cards, various ID cards, and prepaid cards, papers such as government-made postcards and passports, and various transfer objects such as cloths such as T-shirts and handkerchiefs. The image can be transferred.

In this method, a high-resolution image can be obtained irrespective of the material and surface condition of the object to be transferred, and the method can be applied to a non-smooth object to be transferred, as compared with a method of printing directly on a target object to be transferred. There are advantages such as the possibility of printing. However, when an intermediate transfer sheet on which an image is finally transferred is transferred to a target transfer object, the adhesion between the image receiving layer of the intermediate transfer sheet and the printed heat-sensitive transfer image layer is improved depending on the transfer object. As described above, it is necessary to apply the primer layer ink on the surface of the transfer object in advance to provide the primer layer. In many cases, such pre-processing for the transfer target is extremely troublesome, and the pre-processing may not be performed depending on the transfer target.

Conventionally, most of cash cards, credit cards, various ID cards, and the like are PVC cards. However, in recent years, there has been a demand for PVC removal, and various types of plastics such as easily treated PET, amorphous PET, and ABS resin have been used. Cards made of various resin materials have come to be used. However, there has been no intermediate transfer sheet having an image receiving layer capable of coping with these various cards and capable of excellent printing.

[0006]

SUMMARY OF THE INVENTION In view of the circumstances of the prior art as described above, the present invention relates to a method for applying a transfer image to an object to be transferred by a retransfer method using a thermal transfer recording method using an intermediate transfer sheet. An image formed by the image receiving layer on the intermediate transfer sheet and the heat-sensitive transfer image layer transferred to the image receiving layer without performing so-called pre-processing on the object to be re-transferred to form an image without performing so-called pre-processing. And a substrate sheet in a transfer operation of an image receiving layer accompanied by an image on the transfer object, so that good adhesion between the surface of the transfer object and the transfer surface of the transfer object is obtained. In the peeling operation of
It is an object of the present invention to prevent damage to the surface of a transfer receiving member due to excessive peel strength and damage to an image receiving layer accompanied by an image transferred to the surface.

[0007]

According to the first aspect of the present invention, there is provided a heat-sensitive transfer recording sheet in which a heat-sensitive transfer image layer 2 mainly composed of a pigment and a resin is provided on one side of a base sheet 1 in a releasable manner. A: The image layer 2 is formed by laminating at least a release protective layer 12 and an image receiving layer 13 on one side of a support 11 in this order, and a release protective layer from the support 11 in an environment of 20 ° C. to 100 ° C. 12 is transferred onto the image receiving layer 13 of the intermediate transfer sheet B having a 180 ° peel strength of 10 g / mm or less by superimposition and heat transfer to form a transfer image 14 by the image layer 2 on the image receiving layer 13. Image receiving layer 13 of transfer sheet B
Is superimposed on the surface of the transfer object C and heat-bonded, and then the support 11 of the intermediate transfer sheet B is separated from the release protection layer 12, so that the release protection layer 1 is formed on the surface of the transfer object C.
2. A transfer painting method characterized by forming an image 14 whose surface is protected by the method 2.

Next, according to a second aspect of the present invention, in the first aspect, the image receiving layer 13 of the intermediate transfer sheet B has a glass transition point or a softening point of 40 to 150.
A transfer painting method characterized by containing an amorphous organic high-molecular polymer at ℃.

Next, according to a third aspect of the present invention, in the first aspect, the image receiving layer 13 of the intermediate transfer sheet B has a glass transition point or a softening point of 40 to 150.
A transfer painting method characterized by containing an amorphous organic high molecular polymer at 20 ° C. in an amount of 20% by weight or more.

[0010] The invention according to claim 4 of the present invention is the invention according to claim 2 or 3, wherein the amorphous organic high molecular polymer is an acrylic resin. Is the way.

Next, the invention according to claim 5 of the present invention is the invention according to any one of claims 1 to 4, wherein the thermal transfer image layer 2 of the thermal transfer recording sheet A is
This is a transfer painting method characterized by being formed of at least three colors of cyan, magenta and yellow, which are mainly composed of pigment and resin.

Next, the invention according to claim 6 of the present invention is the invention according to any one of claims 1 to 4, wherein the thermal transfer image layer 2 of the thermal transfer recording sheet A comprises:
This is a transfer painting method characterized by being formed of a black color mainly composed of a pigment and a resin.

Next, the invention according to claim 7 of the present invention is the invention according to any one of claims 1 to 6, wherein the thermal transfer image layer 2 of the thermal transfer recording sheet A is
The thermal transfer image layer 2 is formed via an adhesive layer provided on one side of a base sheet so as to be peelable, and
Is transferred to the image receiving layer 13 together with the adhesive layer by heating to form a transferred image 14 by the image layer 2 and the adhesive layer on the image receiving layer 13. Subsequently, the image receiving layer 13 is interposed through the adhesive layer. After superimposed on the surface of the transfer target C and heat-bonded,
A transfer painting method, wherein an image 14 whose surface is protected by the peeling protection layer 12 is formed on the surface of the transfer target C by peeling the support 11 of the intermediate transfer sheet B from the peeling protection layer 12. It is.

According to an eighth aspect of the present invention, there is provided the amorphous organic polymer according to the seventh aspect, wherein the adhesive layer has a glass transition point or a softening point of 40 to 150 ° C. A transfer painting method characterized by containing a polymer.

Next, according to a ninth aspect of the present invention, there is provided the amorphous organic polymer according to the seventh aspect, wherein the adhesive layer has a glass transition point to a softening point of 40 to 150 ° C. Is contained in an amount of 20% by weight or more.

According to a tenth aspect of the present invention, there is provided the transfer picture printing apparatus according to the eighth or ninth aspect, wherein the amorphous organic high molecular polymer is an acrylic resin. Is the way.

Next, the invention according to claim 11 of the present invention is the invention according to any one of claims 7 to 10, wherein the thermal transfer image layer 2 of the thermal transfer recording sheet A is provided.
Is formed of at least three colors of cyan, magenta, and yellow, which are mainly composed of a pigment and a resin.
Is provided on one side of a long base material sheet repeatedly side-by-side in a longitudinal direction with an adhesive layer interposed therebetween.

Next, the invention according to claim 12 of the present invention is the invention according to any one of claims 7 to 10, wherein the thermal transfer image layer 2 of the thermal transfer recording sheet A is provided.
Is formed of at least a black color mainly composed of a pigment and a resin, and the image layer 2 of the black color is sequentially repeated face-to-face along a longitudinal direction via an adhesive layer on one surface of a long base sheet. A transfer painting method characterized by being provided side by side.

A thirteenth aspect of the present invention is the invention according to any one of the first to twelfth aspects, wherein the object to be transferred C is an optical disk. Is the way.

[0020]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 (a) to FIG. 1 (c) show an embodiment of a method for applying a transfer picture to an object to be transferred according to the present invention. , And FIG.
(A) to (c), the configuration of the thermal transfer recording sheet used in the present invention is basically a sheet A shown in FIG. 1 (a), and the configuration of the intermediate transfer sheet is Sheet B shown in FIG. 1B is a basic configuration.

First, the thermal transfer recording sheet A shown in FIG. 1A will be described. A thermal transfer image layer 2 (thermal transfer ink layer) is formed on one side of a base sheet 1 as an image for painting. The thermal transfer image layer 2 is, for example, one color or three of yellow, magenta, and cyan.
Colors or four colors obtained by adding black to these three colors are provided adjacently on one surface of the base sheet 1, and each of the above colors is representative, but a multicolor image provided with colors other than these is provided. Layer 2 may be used. Further, the thermal transfer image layer 2 may be a single color such as black depending on the case.

As the pigment which is a component of the thermal transfer image layer 2, various known pigments can be used, such as carbon black, azo type, phthalocyanine type, quinacridone type, thioindigo type, anthraquinone type and isoindolinone type. Pigments. These can be used in combination of two or more kinds, and a known dye may be added for hue adjustment.

Examples of the binder resin for the thermal transfer image layer 2 include butyral resin, polyamide resin, polyethyleneimine resin, sulfonamide resin, polyester polyol resin, petroleum resin, styrene resin, α-methylstyrene, 2-methylstyrene. , Styrene, such as chlorostyrene, vinylbenzoic acid, sodium vinylbenzenesulfonate, aminostyrene and derivatives thereof, substituted homopolymers and copolymers, methyl methacrylate, ethyl methacrylate, methacrylic acid esters such as hydroxyethyl methacrylate and Methacrylic acid, methyl acrylate, ethyl acrylate, butyl acrylate, α-
Acrylic esters such as ethylhexyl acrylate and acrylic acid, butadienes, isodienes, dienes such as isoprene, acrylonitrile, vinyl ethers, maleic acid and maleic esters, maleic anhydride,
A vinyl monomer such as cinnamic acid, vinyl chloride or vinyl acetate alone or a copolymer of another monomer can be used. These resins may be used in combination of two or more.

Further, in addition to the pigment and the binder resin, additives such as a releasing agent, a softening agent and a surfactant can be appropriately added to the thermal transfer image layer 2. The thermal transfer image layer 2 is finally sandwiched between the image receiving layer 13 and the transfer object C (for example, an optical disk) as a transfer image 14 (see FIG. 2C). Additives can be added only within a range that does not adversely affect the composition.

As a releasing agent and a softening agent, for example, higher fatty acids such as palmitic acid and stearic acid; metal salts of fatty acids such as zinc stearate; fatty acid esters or partially saponified products thereof; fatty acid derivatives such as fatty acid amides; , Derivatives of ethers of polyhydric alcohols, waxes such as paraffin wax, carnauba wax, montan wax, beeswax, wood wax, candelilla wax, low molecular weight polyethylene having a viscosity average molecular weight of about 1,000 to 10,000, polypropylene, polybutylene Or low molecular weight copolymers of olefins, α-olefins with organic acids such as maleic anhydride, acrylic acid, methacrylic acid, vinyl acetate, etc., low molecular weight oxidized polyolefins, halogenated polyolefins, lauryl meta Relate, methacrylic acid esters having a stearyl methacrylate long chain alkyl side chains,
Methacrylic acid esters alone or copolymers with vinyl monomers such as styrene, low molecular weight silicone resins such as polydimethylsiloxane and polydiphenylsiloxane, and silicone-modified organic substances; The above can be selected and used. In addition,
The above-mentioned release agents and softeners, in particular, wax-based or silicone-based release agents are basically not used, but are used as needed.

The surfactant is not particularly limited as long as it is compatible with the composition in the thermal transfer image layer 2 (ink layer). Examples thereof include fatty acid salts, higher alcohol sulfate salts, and aliphatic amines. Or anionic interfaces such as aliphatic amide sulfates, aliphatic alcohol phosphate esters, dibasic fatty acid ester sulfonates, aliphatic amide sulfonates, alkyl allyl sulfonates, and formalin condensed naphthalene sulfonates. Activators, aliphatic amine salts, quaternary ammonium salts,
Cationic surfactants such as alkylpyridinium salts,
Non-ionic surfactants such as polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenol ethers, polyoxyethylene alkyl esters, sorbitan alkyl esters, polyoxyethylene sorbitan alkyl esters, carboxylic acid derivatives, imidazoline derivatives, etc. Amphoteric surfactants and the like, perfluoroalkylcarboxylic acids, fluoroaliphatic group-containing acrylates or fluoroaliphatic group-containing methacrylates and copolymers of polyoxyalkylene acrylates or polyoxyalkylene methacrylates, perfluoroalkylsulfonamides and the like. Can be

As the base sheet 1, paper such as a condenser paper, or a polyester film, a polystyrene film, a polypropylene film, a cellophane, or the like is used from the viewpoint of ease of forming and handling the image layer 2 and mechanical strength. Among them, polyester films (particularly, PET; polyethylene terephthalate, PEN; polyethylene naphthalate, etc.) are preferable because of their high heat resistance. The thickness of the base sheet is preferably 2 to 50 μm from the viewpoint of mechanical strength, ease of handling, or availability, but in order to expect a higher effect of the present invention, heat conductivity, heat transfer coefficient,
Because it is related to thermal characteristics such as heat storage performance,
Is more preferred. The base sheet 1 may be provided with a back coat layer (slip layer, protective layer) on the surface opposite to the image layer 2 if necessary.

The heat-sensitive transfer recording sheet A in the present invention comprises
As shown in FIG. 3A, a heat-sensitive transfer image layer 2 (heat-sensitive transfer ink layer) of one color (for example, black (black; B)) releasably on one side of the base material sheet 1 and a layer adjacent thereto. An adhesive layer 3 may be provided so as to be peelable. Alternatively, as shown in FIG. 6, the thermal transfer image layer 2 of several colors (for example, yellow (yellow; Y), red (magenta; M), and blue (cyan; C)) releasably on one side of the base sheet 1. (Thermal transfer ink layer)
And an adhesive layer 3 may be provided adjacent thereto so as to be peelable. A heat-sensitive transfer recording sheet A in which a plurality of color heat-sensitive transfer image layers 2 are provided adjacently on one side of a base sheet 1.
In the case of (1), when this is used for transfer, the thermal transfer image layer 2 of each color of the sheet A is sequentially moved to the position of the thermal head of the thermal transfer printer for use.

The heat-sensitive transfer recording sheet A provided with the adhesive layer 3 will be described below with reference to FIGS. 3A and 6. The resin used for the adhesive layer 3 is basically 1B and FIG. 3B, the image receiving layer 13 of the intermediate transfer sheet B, the image layer 2 of the thermal transfer recording sheet A, and the transfer object C (FIG. 2B, (See FIG. 4B)
And a resin which can be thermally transferred by peeling from the base sheet 1 can be used. In the case of the thermal transfer recording sheet A in which the thermal transfer image layer 2 and the adhesive layer 3 are provided on one side of the base sheet 1 so as to be adjacent to each other, when the thermal transfer recording sheet A is used for transfer, The image layer 2 and the adhesive layer 3 are used by sequentially positioning and moving them to the position of the thermal head of the thermal transfer printer.

As a result of various investigations, it was found that an acrylic resin was used for the adhesive layer 3 so that no transfer failure was caused on the image receiving layer 13 of the intermediate transfer sheet B on which the thermal transfer recording sheet A was transferred. The image receiving layer 13 on which the adhesive layer 3 is transferred can be transferred to various plastic base materials (for example, a plastic card base material) such as vinyl chloride, amorphous PET, easy-adhesion PET, and ABS. , Can have strong adhesion.

As the base sheet 1 of the thermal transfer recording sheet A provided with the adhesive layer 3 shown in FIG.
As in the case of the thermal transfer recording sheet A without the adhesive layer 3 shown in (a), paper such as condenser paper or a polyester film, a polystyrene film, a polypropylene film, or cellophane, etc., and particularly high heat resistance Therefore, a polyester film (specifically, PET; polyethylene terephthalate or PEN; polyethylene naphthalate, etc.) is preferred. The thickness of the base sheet 1 is also preferably 2 to 50 μm from the viewpoint of mechanical strength, ease of handling, or availability.
In order to expect a higher effect of the present invention, since it is related to thermal characteristics such as thermal conductivity, heat transfer coefficient and heat storage performance,
6 μm is more preferred.

The heat-sensitive transfer recording sheet A provided with the adhesive layer 3 and the heat-sensitive transfer recording sheet A provided without the adhesive layer 3 are both used to improve the heat resistance and the slipperiness of the base sheet 1. It is also preferable to provide a back coat layer on the surface of the base sheet 1 on which the image layer 2 is not provided.

When the conditions required for thermal transfer become strict, for example, for high-speed thermal transfer or the like, the material of the base sheet 1 is compatible with the basic structure of the thermal transfer recording sheet A. By combining the above-mentioned back coat layer made of an appropriate material, it is possible to easily meet more stringent requirements.

The thermal transfer recording sheet A shown in FIG.
For example, the thermal transfer image layer 2 of each color using a color pigment such as three colors of cyan, magenta, and yellow, or four colors of black, cyan, magenta, and yellow is provided on the base sheet 1. When the base sheet 1 is a long sheet (ribbon, tape, etc.), the thermal transfer image layers 2 of each color can be repeatedly provided in the longitudinal direction of the sheet 1 in order.

The thermal transfer recording sheet A provided with the adhesive layer 3 shown in FIG. 3 (a) has a heat-sensitive transfer image layer 2 using, for example, a black color pigment on a base sheet 1 and an adhesive. Layer 3 is provided adjacent to each other. The thermal transfer recording sheet A provided with the adhesive layer 3 shown in FIG. 6 is, for example, formed on a base sheet 1 by, for example, three colors of cyan C, magenta M, and yellow Y, or black B, cyan C, and magenta. The thermal transfer image layer 2 and the adhesive layer 3 of each color using four color pigments such as M and yellow Y are provided adjacent to each other, and the base sheet 1 is, for example, a long sheet (ribbon-shaped,
In the case of a tape shape or the like), the thermal transfer image layer 2 and the adhesive layer 3 of each color can be repeatedly provided in order in the longitudinal direction of the sheet 1.

Thus, the thermal transfer recording sheet A of the present invention
The adhesive layer 3 and the heat-sensitive transfer image layer 2 can be provided side by side on the same base sheet 1 and, for example, three colors of cyan, magenta and yellow or black, cyan, magenta and yellow A thermal transfer image layer 2 of each color using a color pigment such as four colors and an adhesive layer 3 corresponding to each color can be provided side by side on the base sheet 1 in order.

Using these heat-sensitive transfer recording sheets A,
On the image receiving layer 13 of the intermediate transfer sheet B with a thermal transfer printer,
Thermal transfer image layer 2 on one thermal transfer recording sheet A
After the transfer image 14 is formed by sequentially transferring the three colors of cyan, magenta, and yellow, the adhesive layer 3 on the same heat-sensitive transfer recording sheet A is successively transferred onto the image receiving layer 13 of the intermediate transfer sheet B. It is possible to easily transfer the image on the transfer image 14 surface of each color. If four color of the thermal transfer image layer 2 of black, cyan, magenta, and yellow and the adhesive layer 3 are provided in order on one thermal transfer recording sheet A, the basic difference is black. Is increased by one color, and similarly, the respective colors of the thermal transfer image layer 2 and the adhesive layer 3 can be easily and continuously transferred.

According to this, it is preferable because not only the structure of the thermal transfer printer or the image forming apparatus is simplified, but also the processing efficiency relating to the entire image formation is improved.

Next, the intermediate transfer sheet will be described with reference to FIG.
3B, the intermediate transfer sheet B is provided with a release protection layer 12 on one side of a base sheet 11 and an image receiving layer 13 on the release protection layer 12. Is what it is.

Although the thickness of the base sheet 11 of the intermediate transfer sheet B is not particularly limited, it is generally 9 to 300 μm in consideration of the sheet transportability of the printer and the like. Considering that the image receiving layer 13 after the transfer of the thermal transfer image layer 2 and the adhesive layer 3 is heated from the back surface of the base sheet 11 and is transferred to a transfer target C described later, the thickness is preferably 16 to 100 μm. Appropriate.

The peel protection layer 12 of the intermediate transfer sheet B has
An acrylic resin having releasability from the base sheet 11 is used.

The image receiving layer 13 of the intermediate transfer sheet B is a thermoplastic resin having good adhesiveness to the heat-sensitive transfer image layer 2 and the adhesive layer 3, and has a glass transition point or softening point of 40 ° C. to 150 ° C.
C. Amorphous organic high molecular polymer at ℃, especially acrylic resin is most suitable, but in addition, nitrocellulose, ethyl cellulose, cellulose derivatives such as cellulose acetate propionate, polystyrene, styrene such as poly α-methylstyrene Resin, polymethyl methacrylate, acrylic resin such as polyethyl acrylate, polyvinyl chloride,
Polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, polyvinyl butyral, vinyl resin such as polyvinyl acetal, polyester resin, polyamide resin, epoxy resin, polyurethane resin, petroleum resin, ionomer,
Synthetic resins such as ethylene acrylic acid copolymer, ethylene-acrylate copolymer, rosin, rosin-modified maleic resin, ester gum, polyisobutylene rubber, butyl rubber, styrene butadiene rubber, butadiene acrylonitrile rubber, polyamide resin, polychlorin One or more thermoplastic resins of derivatives of natural resins and synthetic rubbers such as olefinated olefins can be used as the main component.

The image receiving layer 13 has a heat-sensitive transfer image layer 2
In consideration of the transferability of the adhesive layer 3, vinyl resins such as polyvinyl chloride, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, polyvinyl butyral, and polyvinyl acetal, polyester resins, polyamide resins, epoxy resins, polyurethane Resins, petroleum resins, polyamide resins, polychlorinated olefin resins, and the like can be used. The normal thickness of the image receiving layer 13 is generally 1 to 10 μm, but is not particularly limited.

The intermediate transfer sheet B of the present invention can be produced, for example, by a conventional method. For example, a composition for forming an image receiving layer is coated on one side of a base sheet 11 with a gravure, a Meyer bar coat, or a roll. It can be manufactured by coating and drying by a coating method such as a coat to form the image receiving layer 13.

[0045]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described.

<Example 1> (Preparation of Thermal Transfer Recording Sheet A) As shown in FIG. 1A, as a base sheet 1 of the thermal transfer recording sheet A, one side of a polyester film 5.5 μm was coated with the following ink. (Yellow, magenta, cyan) thermal transfer image layer 2
Was sequentially coated with a gravure printer at a drying temperature of 90 ° C. so as to be adjacent to each other, to prepare a thermal transfer recording sheet A as a sample. The dry thickness of the image layer of each color is 1 μm. In the following, a unit described as “part” is a description indicating a relative amount based on mass unless otherwise specified.

Yellow ink composition • Disazo yellow pigment 7.0 parts • Butyral resin 10.0 parts • Acrylic resin 5.0 parts • Toluene 60.0 parts • Isopropyl alcohol 10.0 parts

Composition of magenta ink ・ Monoazo red pigment 8.0 parts ・ Butyral resin 10.0 parts ・ Acrylic resin 5.0 parts ・ Toluene 60.0 parts ・ Isopropyl alcohol 10.0 parts

Cyan ink composition-Phthalocyanine blue pigment 8.0 parts-Butyral resin 10.0 parts-Acrylic resin 5.0 parts-Toluene 60.0 parts-Isopropyl alcohol 10.0 parts

(Preparation of Intermediate Transfer Sheet B) As shown in FIG. 1B, a base sheet 11 was formed on one surface of a 16 μm-thick polyethylene terephthalate film to form a release protective layer having the following composition. The resin liquid was applied by a Meyer bar coater and dried to form a release protective layer 12 having a dry thickness of 2 μm. Subsequently, an ink for forming an image receiving layer having the following composition was applied by a Meyer bar coater and dried. By laminating the image receiving layer 13 having a dry thickness of 2 μm on the substrate, an intermediate transfer sheet B as a sample was prepared.

Resin composition for forming release protection layer 100 parts acrylic resin (BR60; manufactured by Mitsubishi Rayon Co., Ltd.) 100 parts polyethylene wax 5 parts

Resin composition for forming image receiving layer ・ Acrylic resin (BR83; manufactured by Mitsubishi Rayon Co., Ltd.) (Tg; 75 ° C.) 20.0 parts ・ Methyl ethyl ketone 40.0 parts ・ Toluene 40.0 parts

Example 2 (Preparation of Thermal Transfer Recording Sheet A) A thermal transfer recording sheet A (see FIG. 1A) was prepared in the same manner as in Example 1 above.

(Preparation of Intermediate Transfer Sheet B) Base Sheet 1
As 1, a resin solution for forming a release protective layer having the following composition was applied to one surface of a polyethylene terephthalate film having a thickness of 16 μm using a Meyer bar coater, dried, and a release protective layer 12 having a dry thickness of 2 μm was formed. Then, a resin for forming an image receiving layer having the following composition is applied by a Meyer bar coater and dried to obtain an image receiving layer 13 having a dry thickness of 2 μm.
The intermediate transfer sheet B (FIG. 1)
(See (b)).

Resin composition for forming release protection layer 100 parts of acrylic resin (BR60; manufactured by Mitsubishi Rayon Co., Ltd.) 5 parts of butyral resin (BX-1; manufactured by Sekisui Chemical Co., Ltd.) 5 parts of polyethylene wax

Resin composition for forming image receiving layer ・ Acrylic resin (BR83; manufactured by Mitsubishi Rayon Co., Ltd.) (Tg; 75 ° C.) 20.0 parts ・ Methyl ethyl ketone 40.0 parts ・ Toluene 40.0 parts

<Example 3> (Preparation of Thermal Transfer Recording Sheet A) As shown in FIG. 3 (a), the base sheet 1 of the thermal transfer recording sheet A was coated on one side of a 5.5 μm polyester film by the above-described method. Of the same inks (yellow, magenta, cyan) as in Example 1,
The thermal transfer image layer 2 made of one-color ink and the adhesive layer 3 made of an adhesive having the following composition, which can be peeled off from the polyester film, are dried at a drying temperature of 10 using a gravure printing machine.
At 0 ° C., a dry film thickness of 1 μm was pattern-coated so as to be adjacent to each other, to prepare a thermal transfer recording sheet A as a sample. The dry thickness of the image layer 2 of each color is 1 μm. As shown in FIG. 6, as the base sheet 1 of the thermal transfer recording sheet A, a thermal transfer image layer 2 made of the same ink (yellow, magenta, cyan) as in Example 1 was applied to one side of a 5.5 μm polyester film. And an adhesive layer 3 made of an adhesive having the following composition, which can be peeled off from the polyester film, and dried at a drying temperature of 1 using a gravure printing machine.
At 00 ° C., a dry film thickness of 1 μm was pattern-coated so as to be adjacent to each other, to prepare a thermal transfer recording sheet A as a sample. The dry thickness of the image layer 2 of each color is 1 μm.

Adhesive composition ・ Acrylic resin (BR83; manufactured by Mitsubishi Rayon Co., Ltd.) (Tg; 75 ° C.) 20.0 parts ・ Methyl ethyl ketone 40.0 parts ・ Toluene 40.0 parts

(Preparation of Intermediate Transfer Sheet B) Example 1 above
The intermediate transfer sheet B (FIG. 1B or FIG.
(See (b)).

<Comparative Example 1> (Preparation of Thermal Transfer Recording Sheet A) A thermal transfer recording sheet A was prepared in the same manner as in Example 1.

(Preparation of Intermediate Transfer Sheet B) Base Sheet 1
As 1, a resin solution for forming a release protective layer having the following composition was applied to one surface of a polyethylene terephthalate film having a thickness of 16 μm using a Meyer bar coater, dried, and a release protective layer 12 having a dry thickness of 2 μm was formed. Then, a resin for forming an image receiving layer having the following composition is applied by a Meyer bar coater and dried to obtain an image receiving layer 13 having a dry thickness of 2 μm.
Was laminated on a base material to produce an intermediate transfer sheet B.

Resin composition for forming release protective layer 100 parts of acrylic resin (BR60; manufactured by Mitsubishi Rayon Co., Ltd.) 10 parts of polyester resin (Byron 200; manufactured by Toyobo Co., Ltd.) 10 parts of polyethylene wax 5 parts

Resin composition for forming image receiving layer ・ Acrylic resin (BR83; manufactured by Mitsubishi Rayon Co., Ltd.) (Tg; 75 ° C.) 20.0 parts ・ Methyl ethyl ketone 40.0 parts ・ Toluene 40.0 parts

<Test Example 1> The thermal transfer recording sheet A and the intermediate transfer sheet B obtained in the above-mentioned Example 1 were
As shown in (b) to (c), the heat-sensitive transfer image layer 2 and the image-receiving layer 13 are superposed on each other and heated and pressed using a commercially available thermal transfer printer, as shown in FIG. ,
The transfer image 14 is formed by transferring the heat-sensitive transfer image layer 2 of the heat-sensitive transfer recording sheet A onto the image receiving layer 13 of the intermediate transfer sheet B, and then, as shown in FIGS. The image receiving layer 13 of the intermediate transfer sheet B on which the image 14 has been transferred is
The image receiving layer 13 on which the transferred image 14 was transferred was superimposed on the surface of an optical disc (disc material; polycarbonate resin, disc surface protective material; ultraviolet curable resin) as the transfer object C, and the image was transferred by a 180 ° C. heat roller. The base material sheet 11 is peeled and removed, and an image transfer product (FIG. 2)
(See (c)).

<Test Example 2> Using the heat-sensitive transfer recording sheet A and the intermediate transfer sheet B obtained in Example 2 above,
Transfer painting is performed in the same manner as in Test Example 1 above, and the base sheet 1
1 was peeled and removed to prepare an image transfer product (see FIG. 2C).

<Test Example 3> The thermal transfer recording sheet A and the intermediate transfer sheet B obtained in the above-mentioned Example 3 were
As shown in (b) to (c), the heat-sensitive transfer image layer 2 and the adhesive layer 3 and the image-receiving layer 13 are superposed on each other so as to face each other, and using a commercially available heat transfer printer, the heat-sensitive transfer image layer 2 area ( H) is heated and pressurized to transfer the heat-sensitive transfer image layer 2 and the adhesive layer 3 of the heat-sensitive transfer recording sheet A to the image receiving layer 1 of the intermediate transfer sheet B.
3A, and a transfer image 14 is transferred and formed on the image receiving layer 13 as shown in FIG.
As shown in (b), the heat-sensitive transfer recording sheet A is moved in the direction of the arrow, the adhesive layer 3 is superimposed on the transfer image 14 of the image receiving layer 13, and the transfer image 14 and the area of the adhesive layer 3 (H 4) is heated and pressurized to transfer and form the adhesive layer 3 on the transfer image 14 as shown in FIG. 4 (c).
As shown in (a) and (b), the image receiving layer 13 of the intermediate transfer sheet B is formed on the surface of an optical disk (disc material; polycarbonate resin, disc surface protection material; ultraviolet curable resin) as the transfer object C. 180 ℃
Then, the image receiving layer 13 was transferred and painted on the transfer object C via the adhesive layer 3 by the heat roller, and the base sheet 11 was peeled off to prepare an image transfer product (see FIG. 4C).

<Test Example 4> Using the thermal transfer recording sheet A and the intermediate transfer sheet B obtained in Comparative Example 1 above,
Transfer painting is performed in the same manner as in Test Example 1 above, and the base sheet 1
1 was peeled off to prepare an image transfer product.

<Comparative Results> The above Example 1 (Test Example 1),
According to Example 2 (Test Example 2) and Example 3 (Test Example 3), the image transfer product produced using the heat-sensitive transfer recording sheet A and the intermediate transfer sheet B in the present invention is the transfer object C When the base sheet 11 of the intermediate transfer sheet B was peeled off, Example 1 was 5 g / 20 mm at 20 ° C. and 5 g / 20 m at 100 ° C.
m, 100 g / mm at 20 ° C., 120 g / 20 mm at 100 ° C., and 5 g / m at 20 ° C.
m, the peel strength was as low as 5 g / mm at 100 ° C., the surface of the transferred material C was not damaged, and a good transfer image was obtained.

On the other hand, the image transfer product produced in Comparative Example 1 (Test Example 4) has low adhesion (adhesion strength) to the transfer object C, and peels off the base sheet 11 of the intermediate transfer sheet B. When the peel strength is 300g / m at 20 ° C
m, which was too strong at 500 ° C. at 100 ° C., causing damage on the painted surface of the transfer object C, and good transfer painting was not obtained. The comparison results are shown in Tables 1 and 2 below.

[0070]

[Table 1]

[0071]

[Table 2]

[0072]

According to the present invention, in a transfer painting method by a retransfer method based on a thermal transfer recording method using an intermediate transfer sheet, a pretreatment is not performed on an object to be retransferred to form an image. To obtain good adhesion between the image receiving layer on the intermediate transfer sheet, and the surface of the image formed by the thermal transfer image layer transferred to the image receiving layer, and the transfer surface of the transfer object. In addition, in the peeling operation of the base sheet in the transfer operation of the image receiving layer with the image on the surface of the transfer receiving member, since a moderate weak peel strength is obtained,
It has the effect of preventing damage to the image-bearing image surface of the transferred body caused by excessive peel strength, and in particular, precision parts represented by disks such as optical disks and various plastic cards as electronic recording media. It is suitable for precise painting of a kind of transfer-receiving body, and has an effect that good adhesion and painting of high-quality images (patterns, characters, etc.) can be obtained.

[Brief description of the drawings]

1 (a) to 1 (c) are side views illustrating an embodiment of the method of the present invention.

FIGS. 2A to 2C are side views illustrating an embodiment of the method of the present invention.

3 (a) to 3 (c) are side views for explaining another embodiment of the method of the present invention.

4 (a) to 4 (c) are side views for explaining another embodiment of the method of the present invention.

5 (a) and 5 (b) are side views for explaining another embodiment of the method of the present invention.

FIG. 6 is a side view for explaining another embodiment of the method of the present invention.

[Explanation of symbols]

A: Thermal transfer recording sheet B: Intermediate transfer sheet C: Transfer receiving object 1: Base sheet 2: Thermal transfer image layer 3: Adhesive layer 11: Base sheet 12: Peeling protective layer 13: Image receiving layer
14: Transfer image

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B41M 5/40 G11B 7/26 531 5D029 B42D 15/10 501 B41J 3/20 109J 5D121 G11B 7/24 571 117A 7/26 531 B41M 5/26 HF term (reference) 2C005 HB02 HB04 HB09 LA20 LA30 LB08 2C065 AB09 AC01 AF01 CJ02 CJ03 DA33 2C068 AA06 BB26 BD17 BD23 2H111 AA05 AB07 BA03 BA04 BA47 BA48 BA49 BA09 FA09 EA01 FB23 FB25 FC08Z FD05Z FD06Z FD10Z GA02 GB01 5D029 PA01 5D121 AA03 GG30

Claims (13)

[Claims] 1. A heat-sensitive transfer recording sheet A in which a heat-sensitive transfer image layer 2 containing a pigment and a resin as main components is releasably provided on one side of a base sheet 1, and the image layer 2 is provided on at least one side of a support 11. Intermediate transfer in which a peel protective layer 12 and an image receiving layer 13 are laminated in this order, and the 180 ° peel strength of the peel protective layer 12 from the support 11 in an environment of 20 ° C. to 100 ° C. is 10 g / mm or less. The transfer image 14 formed by the image layer 2 is formed on the image receiving layer 13 by heating and superimposed on the image receiving layer 13 of the sheet B. Subsequently, the image receiving layer 1 of the intermediate transfer sheet B is formed.
After superimposing 3 on the surface of precision part C and bonding by heating,
A transfer painting method, wherein an image 14 whose surface is protected by the peeling protection layer 12 is formed on the surface of the transfer target C by peeling the support 11 of the intermediate transfer sheet B from the peeling protection layer 12. . 2. The transfer according to claim 1, wherein the image receiving layer 13 of the intermediate transfer sheet B contains an amorphous organic high molecular polymer having a glass transition point to a softening point of 40 to 150 ° C. Painting method. 3. The image receiving layer 13 of the intermediate transfer sheet B contains at least 20% by weight of an amorphous organic high molecular polymer having a glass transition point to a softening point of 40 to 150 ° C. 1. The transfer painting method according to 1. 4. The transfer painting method according to claim 2, wherein the amorphous organic high molecular polymer is an acrylic resin. 5. A heat-sensitive transfer image layer 2 of the heat-sensitive transfer recording sheet A, wherein the heat-sensitive transfer image layer 2 comprises at least cyan containing a pigment and a resin as main components.
5. The transfer painting method according to claim 1, wherein the transfer painting method is formed of three colors of magenta and yellow. 6. The thermal transfer image layer 2 of the thermal transfer recording sheet A is formed of a black color containing pigment and resin as main components.
The transfer painting method according to any one of claims 1 to 6. 7. The thermal transfer image layer 2 of the thermal transfer recording sheet A is formed via an adhesive layer removably provided on one side of a base sheet, and the thermal transfer image layer 2 is formed on the intermediate transfer sheet. B is transferred to the image receiving layer 13 by heating together with the adhesive layer to form a transfer image 14 by the image layer 2 and the adhesive layer on the image receiving layer 13, and then the image receiving layer 13 is interposed through the adhesive layer. Then, the support 11 of the intermediate transfer sheet B is peeled off from the release protection layer 12 after being superposed on the surface of the transfer target C and heated and adhered. 7. The transfer painting method according to claim 1, wherein a protected image is formed. 8. The transfer painting method according to claim 7, wherein the adhesive layer contains an amorphous organic high molecular polymer having a glass transition point to a softening point of 40 to 150 ° C. 9. The transfer printing method according to claim 7, wherein the adhesive layer contains at least 20% by weight of an amorphous organic high molecular polymer having a glass transition point to a softening point of 40 to 150 ° C. Method. 10. The transfer painting method according to claim 8, wherein the amorphous organic high molecular polymer is an acrylic resin. 11. A heat-sensitive transfer image layer 2 of the heat-sensitive transfer recording sheet A, wherein at least cyan containing a pigment and a resin as main components.
It is formed of three colors of magenta and yellow, and the image layers 2 of the three colors are provided on one surface of a long base sheet repeatedly in a line-sequential manner along the longitudinal direction via an adhesive layer. Any one of claims 7 to 10
Transfer painting method described in section. 12. The thermal transfer image layer 2 of the thermal transfer recording sheet A is formed of at least black color mainly composed of pigment and resin, and the black color image layer 2 is formed of a long base sheet. The transfer painting method according to any one of claims 7 to 10, wherein the transfer painting method is provided so as to be repeatedly arranged on one surface side by side in the longitudinal direction via an adhesive layer. 13. The transfer painting method according to claim 1, wherein the transfer object C is an optical disk.