JP2003145950A - Intermediate transfer recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intermediate transfer recording medium in which an acceptive layer is not released by a thermal transfer sheet when forming an image, the image-formed acceptive layer can be preferably transferred to the material to be transferred and a polypropylene film can be used as a base sheet. SOLUTION: The intermediate transfer recording medium comprises a mold release layer and the acceptive layer formed with the image on the base. In this medium, the adhesive force F1 at 23 deg.C of the release layer to the acceptive layer is 0.10 to 2.0 N/85 mm, the adhesive force F2 of the release layer to the acceptive layer in the case of transferring the acceptive layer of the medium to the material to be transferred at 120 to 160 deg.C is 0.05 to 1.0 N/85 mm, and F1>F2 is satisfied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermediate transfer recording medium, and more particularly to an intermediate transfer recording medium capable of imparting an image by a sublimation type thermal transfer system onto any transfer target.

[0002]

2. Description of the Related Art Conventionally, a sublimation type thermal transfer sheet (hereinafter simply referred to as "thermal transfer sheet") having a dye layer provided on one surface of a substrate sheet and a dye receiving layer (hereinafter simply referred to as "receiving layer") are provided. The thermal head and the platen roll are pressed against each other to selectively heat the heat-generating portion of the thermal head according to the image information, and the dye contained in the dye layer on the thermal transfer sheet is receptive layer. Various sublimation-type thermal transfer systems have been proposed in which an image is recorded by shifting to.

In the sublimation type thermal transfer system, since the amount of dye transfer can be controlled in dot units by the amount of energy applied to the thermal transfer sheet, gradation reproduction by density modulation is possible. In addition, since the coloring material used is a dye, the image formed is transparent and has excellent reproducibility of intermediate colors when colors are overlapped by using a plurality of dye layers. Therefore, by using a thermal transfer sheet of three colors of yellow, magenta, and cyan or four colors obtained by adding black to these, by superimposing and recording these three colors or four colors on the image receiving sheet, a high-quality full-color image can be obtained. It can be formed.

In the above-mentioned sublimation type thermal transfer system, it is necessary that the image receiving surface of the image receiving sheet has a dyeing property with respect to the dye, and an image is not formed on the transfer receiving member having no receiving layer. It was almost impossible. In order to form an image with a dye on the transfer material other than the special paper for which the reception layer has been set in advance, transfer the reception layer to the transfer material from the reception layer transfer sheet that is peelably formed on the base material sheet. Then, a technique has been proposed in which a dye is transferred from the sublimation type thermal transfer sheet to form an image thereon (see Japanese Patent Laid-Open No. 62-264994).

In this method, the receiving layer on the transferred material is strongly influenced by the surface quality of the transferred material, and pinholes are generated in the recesses of the transferred material, or the surface of the transferred material is uneven due to the unevenness of the surface of the transferred material. Becomes uneven, and unevenness occurs in the formed image. Therefore, in order to obtain a good image-formed product, it was necessary to select a transfer target having a smooth surface.

Therefore, in order to enable image formation by a sublimation type thermal transfer system on an arbitrary transferred material and to prevent the image quality from being affected by the surface unevenness and texture of the transferred material, first, the receiving layer is formed. An image is formed by transferring the dye from the thermal transfer sheet to the receiving layer of the intermediate transfer recording medium that is releasably provided on the base sheet, and then heating the intermediate transfer recording medium to form an image. A so-called intermediate transfer method has also been proposed in which the receptive layer is transferred onto a transfer target (see Japanese Patent Application Laid-Open No. 62-238791).

[0007]

While the above-mentioned intermediate transfer method has a great advantage that a dye image can be easily applied to an arbitrary transferred material having no receiving layer, the receiving layer having an image is transferred to the transferred material. It is difficult to appropriately control the adhesive force (peeling force) between the release layer and the receiving layer when the transfer is performed. That is, if the adhesive strength is too small, an image is formed using a thermal transfer sheet for the receiving layer, and when the thermal transfer sheet is subsequently peeled off, the receiving layer may be peeled off by adhering to the dye layer of the thermal transfer sheet, There is a problem that the receptive layer may peel off during handling before transfer to the transfer target.

On the other hand, when the adhesive force between the release layer and the receiving layer is too large, the transfer of the receiving layer to the transferred material becomes insufficient, and a part of the receiving layer remains on the intermediate transfer recording medium side. There is. Furthermore, in many cases of conventional intermediate transfer recording media, a polyethylene terephthalate film is used as a base sheet, and physical properties such as strength are inferior to those, but it is difficult to use an inexpensive polypropylene film.

Therefore, the object of the present invention is to solve the above-mentioned problems of the prior art, the receptor layer is not peeled off by the thermal transfer sheet during image formation, and the image-formed receptor layer can be satisfactorily transferred to the transfer target, and An object of the present invention is to provide an intermediate transfer recording medium which can sufficiently use a polypropylene film as a base material sheet in addition to a polyethylene terephthalate film.

[0010]

The above object can be achieved by the present invention described below. That is, the present invention provides an intermediate transfer recording medium having a release layer and a receiving layer on which an image is formed on a base sheet, and the release layer and the receiving layer are
Adhesive force F1 at 3 ° C is 0.10 to 2.0 N / 85 m
m, the adhesive force F2 between the release layer and the receiving layer at the time of transferring the receiving layer of the intermediate transfer recording medium to the transferred material at 120 to 160 ° C. is 0.05 to 1.0 N / 85 mm, Further, there is provided an intermediate transfer recording medium characterized in that F1> F2.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail with reference to the following preferred embodiments. FIG. 1 is a diagram schematically illustrating the basic structure of an intermediate transfer recording medium of the present invention.
The intermediate transfer recording medium of the present invention has a receptive layer 3 releasably formed on one surface of a substrate sheet 1 via a release layer 2.

According to the present invention, in the above-mentioned intermediate transfer recording medium, the adhesive force F1 between the release layer 2 and the receiving layer 3 at 23 ° C.
Is 0.10 to 2.0 N / 85 mm, and the adhesive force F2 between the release layer and the receiving layer is 0.0 when the receiving layer of the intermediate transfer recording medium is transferred to the transfer target at 120 to 160 ° C.
5 to 1.0 N / 85 mm, and F1> F2. With such a structure, the above-mentioned object of the present invention is achieved.

In a preferred embodiment of the present invention, a dye layer of a thermal transfer sheet (not shown) is superposed so as to face the receiving layer 3 of the intermediate transfer recording medium shown in FIG. 1, and a dye image is formed on the receiving layer 3 by a thermal head. After that, the thermal transfer sheet is peeled off, and the release layer is formed so that the adhesive force (peeling force) F3 becomes smaller than the adhesive force F1. By doing so, even if the receiving layer adheres to the dye layer during image formation, the receiving layer is not peeled off.

Further, in another preferred embodiment of the present invention, an image is formed on the receiving layer as described above, and the thermal fusing property of the receiving layer is used to transfer the receiving layer having the image to the transferred material. In addition to being able to do so, as shown schematically in FIG.
After forming the adhesive layer 4 on the receiving layer 3 having the image 5, the receiving layer 3 can be transferred to the transfer target through the adhesive layer 4. The release layer 2 is formed such that the adhesive force F4 between the adhesive layer 4 and the receiving layer 3 at 23 ° C. at this time is larger than the adhesive force F1. By doing this,
The receiving layer 3 having the image 5 is on the base sheet 1 side (release layer 2
It can be uniformly transferred to the transfer target without being left over.

Next, the constituent materials of the intermediate transfer recording medium of the present invention will be described. Substrate sheet 1 of the intermediate transfer recording medium of the present invention
The same base sheet as that used for the conventional thermal transfer sheet can be used, but preferable examples include a polyethylene terephthalate film and a polypropylene film. The thickness of these base material sheets can be appropriately selected according to the material so that the strength, thermal conductivity, heat resistance, etc. are appropriate, but usually 1 to 1
Those having a diameter of about 00 μm are preferably used.

A release layer 2 is formed on one surface of the base sheet 1. The resin that can be used for forming the release layer is a thermosetting resin, and particularly a thermosetting silicone-modified acrylic resin (for example, trade name Celltop 226, 227, manufactured by Daicel Chemical Co., Ltd.), alkyd -Amino resin (for example, trade name TCM-02 medium, manufactured by Dainippon Ink and Chemicals, Inc.) and epoxy-amino resin (for example, trade name TCM-150, manufactured by Dainippon Ink and Chemicals).

Such a thermosetting and mold-releasing resin is prepared by appropriately setting the amount of catalyst used and the drying and curing conditions (for example, heat curing at a temperature of 100 to 115 ° C. for 5 to 120 seconds). The adhesive force F1 between the release layer 2 and the receiving layer 3 to be formed can be controlled to an appropriate value as described in Examples described later. Further, the resin as described above can form a release layer having good adhesion to a base sheet made of polyethylene terephthalate or polypropylene.

The release layer 2 comprises a bar coater, a gravure printing method, a screen printing method, a gravure method, which is prepared by dissolving or dispersing the above resin in a solvent such as water or an organic solvent on the above-mentioned substrate sheet 1. It can be formed by coating by a usual method such as a reverse roll coating method using a plate. The coating amount is such that the film thickness after coating and drying is 0.1 to 10.
It is desirable that the thickness be 20 μm.

The receptive layer 3 is formed on the release layer 2 so as to be peelable. That is, when the receiving layer 3 is formed on the base material sheet 1 via the releasing layer 2 to form an intermediate transfer recording medium, the receiving layer 3 is used when the receiving layer 3 is transferred to a transfer target.
It is peeled off at the interface with and transferred onto the transfer target. Receptive layer 3
Is composed of at least a binder resin, and various additives such as a release agent may be added if necessary.

As the binder resin forming the receiving layer,
It is preferable to use a sublimation dye which is easily dyed, for example, polyolefin resin such as polypropylene, polyvinyl chloride, halogenated resin such as polyvinylidene chloride, polyvinyl acetate, vinyl resin such as polyacrylic ester, Polyester resins such as polyethylene terephthalate and polybutylene terephthalate, polystyrene resins, polyamide resins, copolymers of olefins such as ethylene and propylene with other vinyl monomers,
A single substance or a mixture of an ionomer, a cellulose derivative or the like can be used, and among these, vinyl resins and polyester resins are particularly preferably used.

The receptive layer may contain a release agent in the above resin in order to prevent thermal fusion between the receptive layer and the dye layer of the thermal transfer sheet when a dye image is formed on the receptive layer. preferable. As the release agent, silicone oil, phosphoric acid ester-based surfactant, fluorine-based compound and the like can be used, and among these, silicone oil is particularly preferably used. The amount of the release agent added is preferably 0.2 to 30 parts by weight with respect to 100 parts by weight of the binder resin forming the receiving layer. The receptive layer can be formed on the release layer in the same manner as the above-mentioned release layer, and the film thickness is preferably 0.1 to 10 μm.

Further, for the purpose of protecting the receptor layer transferred onto the transferred material, a release layer 6 (image protective layer) is provided between the release layer 2 and the receptor layer 3 as shown in FIG. Good. The peeling layer 6 is peeled off at the interface with the release layer 2 at the time of transferring the receiving layer to the transferred material and is transferred onto the transferred material together with the receiving layer 3.
As a result, it is located on the outermost surface of the receptive layer having the image transferred onto the transfer target, and the weather resistance of the image and the durability against fingerprints, chemicals, etc. are improved. The peeling layer 6 is made of resin, and has an appropriate adhesive force (F1) with the release layer 3,
After being transferred together with the image-formed receiving layer 3 to the transfer target, a resin composition having desired physical properties is selected and formed as a surface protective layer of the receiving layer 3.

The release layer is typically ethyl cellulose,
Cellulose derivatives such as nitrocellulose and cellulose acetate, acrylic resins such as polymethylmethacrylate, polyethylmethacrylate and polybutylacrylate, polyvinyl chloride, vinyl chloride vinyl acetate copolymer, vinyl polymers such as polyvinyl butyral. It can be formed using a thermoplastic resin, a thermosetting resin such as an unsaturated polyester resin, a polyurethane resin, or an aminoalkyd resin. The release layer can be formed by the same method as the receptive layer, and the thickness is preferably 0.1 to 10 μm.

As shown in FIG. 4, when the adhesiveness between the release layer 2 and the base sheet 1 is insufficient, an adhesive layer 7 is formed between the release layer 2 and the base sheet 1. Good. As a material used for forming the adhesive layer 7, a thermoplastic resin, a natural resin, rubber, wax or the like, which has good adhesiveness to the base sheet 1, can be used. The adhesive layer 7 can be formed by a method similar to the method for forming the release layer 2 described above. After the adhesive layer 7 is formed on the base material sheet 1, the release layer 2 is formed on the adhesive layer 7. The thickness of the adhesive layer 7 is determined in view of the adhesive performance between the release layer 2 and the base sheet 1, but is usually 0.1 to 20 μm.
m is preferred.

Further, when the receiving layer (which may include a peeling layer) of the intermediate transfer recording medium is transferred to the transferred body, thermal fusion with a heating device such as a thermal head or a line heater is prevented and the running is performed. For the purpose of smoothing the above, it is preferable to provide a back layer (not shown) on the other surface of the base sheet that contacts the heating device on the receiving layer side. This back layer can be formed by various materials and methods used in conventionally known thermal transfer sheets.

As the thermal transfer sheet used in the present invention, any conventionally known sublimation type thermal transfer sheet can be used, and any conventionally known method can be used as a means for applying thermal energy. Since the image finally obtained in the present invention has a mirror image relationship with the image formed on the receiving layer of the intermediate transfer recording medium, the image formed on the intermediate transfer recording medium needs to be previously formed as a reverse image. There is.

In the image forming method using the intermediate transfer recording medium of the present invention, after the image is formed on the receiving layer, the receiving layer on which the image is formed is placed on the transfer target using a suitable heating device. Transfer and perform. Examples of the heating device used when the receptor layer is transferred from the intermediate transfer recording medium to the transferred material include a thermal head, a line heater, a hot stamper, and a heat roller.

When the above image-formed receiving layer is transferred to the transferred material, an adhesive layer may be formed on the surface of the imaged receiving layer or on the transfer site of the transferred material, if necessary. You can For the formation of this adhesive layer, it is preferable to use an adhesive layer thermal transfer sheet in which an adhesive layer is provided on one surface of the base material sheet with a release layer if necessary. The material to be transferred that can be used in the present invention is not particularly limited, and examples thereof include natural fiber paper, coated paper, tracing paper, plastic film that is not deformed by heat during transfer, glass, metal, ceramics, wood, cloth, etc. But it doesn't matter.

[0029]

EXAMPLES Next, the present invention will be described more specifically with reference to Examples, Comparative Examples and Reference Examples. In the text, "part" or "%" is based on weight unless otherwise specified. <Example 1> On the surface of a polypropylene film (trade name: Trefan BO Grade 2500, thickness 20 μm, manufactured by Toray Industries, Inc.) having a thickness of 20 μm and having a heat resistant slipping layer on the back surface,
A release layer 1 coating solution having the following composition was applied in a predetermined dry coating amount and dried and cured at a temperature of 115 ° C. for 30 seconds to form a release layer 1, and then a release layer coating solution having the following composition was used. Apply at a predetermined dry coating amount, dry at 110 ° C for 30 seconds to form a release layer, and further apply a receiving layer coating solution having the following composition at a predetermined dry coating amount and dry at 115 ° C for 30 seconds. Then, a receiving layer was formed to obtain an intermediate transfer recording medium of the present invention. All of the coating solutions described above were applied by the gravure coating method.

(Coating liquid for release layer 1) 5 parts of silicone modified acrylic resin (Celltop 226, manufactured by Daicel Chemical Co., Ltd.) 10 parts of silicone modified acrylic resin (Celltop 227, manufactured by Daicel Chemical Company) Aluminum Catalyst (Celltop CAT-A, manufactured by Daicel Chemical Co., Ltd.) 3 parts, methyl ethyl ketone 8 parts, toluene 8 parts (dry coating amount: 0.7 g / m ² ).

[0031]

(Receptor layer coating liquid) -Vinyl chloride-vinyl acetate copolymer (Denka vinyl 1000A, manufactured by Denki Kagaku Kogyo) 30 parts-Vinyl chloride-vinyl acetate copolymer (Denka vinyl 1000ALK, manufactured by Denki Kagaku Kogyo) 5 parts / epoxy modified silicone oil (X-22-3000T, manufactured by Shin-Etsu Chemical Co., Ltd.) 0.4 parts (dry coating amount: 4.0 g / m ² ).

<Examples 2 to 5> An intermediate transfer recording medium of the present invention was obtained in the same manner as in Example 1 except that the dry curing conditions for the release layer 1 in Example 1 were changed as follows. Example 2 ・ ・ ・ 110 ° C. × 60 seconds Example 3 ・ ・ ・ 110 ° C. × 30 seconds Example 4 ・ ・ ・ 105 ° C. × 30 seconds Example 5 ・ ・ ・ 100 ° C. × 30 seconds

Example 6 The procedure of Example 1 was repeated except that the release layer 1 coating solution was replaced with the following release layer 2 coating solution and the release layer curing conditions were 115 ° C. × 30 seconds. An intermediate transfer recording medium of the present invention was obtained in the same manner as in Example 1.

(Release Layer 2 Coating Liquid) 9 parts of alkyd-amino resin (TCM-02 medium, Dainippon Ink and Chemicals, Inc.) Epoxy-amino resin (TCM-150, Dainippon Ink & Chemicals) 1 part ・ Acid catalyst (PL curing agent C, Dainippon Ink and Chemicals Co., Ltd.) 0.3 part ・ Methyl ethyl ketone 8 parts ・ Toluene 8 parts (dry coating amount: 0.7 g / m ² ).

<Example 7> An intermediate transfer recording medium of the present invention was obtained in the same manner as in Example 6 except that the dry curing condition of the release layer 2 in Example 6 was 110 ° C for 30 seconds.

Example 8 A polyethylene terephthalate film A having a thickness of 25 μm (trade name: Lumirror T60 # 25, manufactured by Toray Industries, Inc.) was used as the base film in Example 1, and the release layer 1 was cured under the following conditions. An intermediate transfer recording medium of the present invention was obtained in the same manner as in Example 1 except that the temperature was 110 ° C x 30 seconds.

Example 9 A polyethylene terephthalate film A (trade name: Lumirror T60 # 25, manufactured by Toray Industries, Inc.) having a thickness of 25 μm was used as the base film in Example 6, and the release layer 2 was cured under the following conditions. An intermediate transfer recording medium of the present invention was obtained in the same manner as in Example 6 except that the temperature was 110 ° C for 30 seconds.

Comparative Example 1 An intermediate transfer recording medium of Comparative Example was obtained in the same manner as in Example 1 except that the release layer 1 was not formed. <Comparative Example 2> The dry curing of the release layer 1 in Example 1 was 1
An intermediate transfer recording medium of a comparative example was obtained in the same manner as in Example 1 except that it was set at 20 ° C. for 30 seconds.

Comparative Example 3 An intermediate transfer recording medium of Comparative Example was obtained in the same manner as in Example 1 except that the release layer 1 was dried and cured at 90 ° C. for 30 seconds. Comparative Example 4 An intermediate transfer recording medium of Comparative Example was obtained in the same manner as in Example 7, except that the release layer 2 was not formed in Example 7.

<Reference Example> (Production Example of Adhesive Layer Thermal Transfer Sheet) A 25 μm thick polyethylene terephthalate film having a heat resistant slipping layer formed on the back surface (trade name: Lumirror T60 #)
25, manufactured by Toray Co., Ltd.) on the surface of which a release layer coating solution having the following composition was applied in a predetermined dry coating amount and dried and cured at 110 ° C. for 30 seconds, and then an adhesive layer coating solution having the following composition was predetermined. Was applied at a dry coating amount and dried at 110 ° C. for 30 seconds to form an adhesive layer to obtain an adhesive layer thermal transfer sheet of Reference Example. All of the coating solutions described above were applied by the gravure coating method.

(Release layer coating liquid) -Silicone modified acrylic resin (Celltop 226, manufactured by Daicel Chemical Co., Ltd.) 16 parts-Aluminum catalyst (Celltop CAT-A, manufactured by Daicel Chemical Co., Ltd.) 3 parts-Methyl ethyl ketone 8 parts・ Toluene 8 parts (dry coating amount: 0.7 g / m ² )

(Coating liquid for adhesive layer) -Acrylic resin (Dickseal A-415, manufactured by Dainippon Ink and Chemicals, Inc.) 10 parts-UV absorber acrylic copolymer (UVA635L, manufactured by BASF Japan) 2 parts-Dioxide Silicon (Sylysia 310, manufactured by Fuji Silysia Chemical Ltd.) 0.3 part / methyl ethyl ketone 4 parts / toluene 4 parts (dry coating amount: 1.0 g / m ² ) The base sheet used in the above Examples and Comparative Examples and the release The dry curing conditions for forming the mold layers 1 and 2 are summarized in Table 1 below.

[0044]

The following various tests were carried out using the intermediate transfer recording medium and the adhesive layer thermal transfer sheet of the above Examples and Comparative Examples, and the results are shown in Tables 2 to 5 below. [Measurement of Adhesive Force F1 between Base Material or Release Layer and Receptive Layer (without Adhesive Layer)] Polyester tape (product name: Nitto Tape 31C) manufactured by Nitto Denko on the receiving layer side of the intermediate transfer recording medium.
Heat-sealing and pasting together, and the adhesive force between the release layer and the receiving layer when the polyester sheet is peeled off is defined by JIS P
The T-shaped peeling jig specified in 8139 was used, and the measurement was performed using Hayden 14DR manufactured by Shinto Scientific Co., Ltd. under the following conditions.

[Measurement of Adhesive Force F3 between Dye Layer and Receptive Layer during Image Forming] Thermal energy is added by using a thermal head of a printer which operates according to an electric signal obtained by color-separating a face photograph to obtain a full-color image. (The sublimation thermal transfer sheet used was the one equipped in the above printer, and the intermediate transfer recording medium was the one described above. Printing conditions: 20
msec / line, 14.5V). At this time, the adhesive force F3 between the dye layer and the receiving layer at 23 ° C. was measured in the same manner as described above. [Adhesive force F4 between the adhesive layer and the receiving layer of the receiving layer with the adhesive layer obtained by transferring the adhesive layer from the adhesive layer thermal transfer sheet onto the receiving layer
Measurement] After the adhesive layer was transferred from the adhesive layer transfer sheet to the receptor layer having the image obtained above, the adhesive force F4 between the adhesive layer and the receptor layer at 23 ° C. was measured in the same manner as above.

[Retransferability] The receiving layer surface of the intermediate transfer recording medium and the acrylic resin plate are superposed on each other, and a Tamipacker LPD2305PRO manufactured by Fuji Plastics Co., Ltd. is used as a laminator machine.
Heat and pressure transfer was performed under each laminator condition, and the base sheet of the intermediate transfer recording medium was peeled off. Retransferability evaluation: After transfer, the base material sheet was peeled off by hand to visually confirm the transfer state, and the evaluation was made according to the following criteria. Evaluation of retransfer property ○: Good retransfer property. No tailing. Δ: There is a trail of 3 mm or more. X: Poor retransferability. There is missing transfer. Image quality evaluation: Visually evaluated according to the following criteria. ⊚: Has gloss and good image quality. ◯: No problem in practical use. X: Matte tone and poor image reproducibility.

[Printing] The dye layer or the adhesive layer was transferred under the following two environmental conditions with the printer used for measuring the adhesive strength. Printing environment: 21.5 ° C-40% RH, and 45 ° C
-60% RH ◯: There is no problem and printing is possible. X: The receiving layer is peeled off on the ribbon side at the interface between the substrate or the release layer and the receiving layer.

<Test 1> Using the intermediate transfer recording media of Examples 1 to 7 and Comparative Examples 1 to 3, adhesive forces F1 and F2,
The retransfer property and the image quality were measured and the results shown in Table 2 below were obtained.

<Test 2> Adhesive strengths F1 and F2 and retransferability were obtained by using the intermediate transfer recording media of Examples 1 to 7 and Comparative Examples 1 to 3 to which the adhesive layer was transferred from the adhesive layer transfer sheet. The image quality was measured and the results shown in Table 3 below were obtained.

<Test 3> Using the intermediate transfer recording media of Examples 1 to 7 and Comparative Examples 1 to 3, the adhesive force F1, the adhesive force F3 between the dye layer and the receiving layer, and the state of printing were measured. The results shown in Table 4 were obtained.

<Test 4> Using the intermediate transfer recording media of Examples 1 to 7 and Comparative Examples 1 to 3, the adhesive force F1, the adhesive force F4 between the dye layer and the receiving layer, and the state of printing were measured. The results shown in Table 5 were obtained.

<Test 5> Using the intermediate transfer recording media of Examples 3, 7, 8, 9 and Comparative Examples 1 and 4, the adhesiveness between the substrate and the release layer, the printability and the retransferability were examined. The results shown in Table 6 below were obtained.

[0054]

According to the present invention as described above, the receptor layer is not peeled off to the thermal transfer sheet during image formation, the image-formed receptor layer can be satisfactorily transferred to the transferred material, and polyethylene terephthalate is used as the base sheet. It is possible to provide an intermediate transfer recording medium in which a polypropylene film other than the film can be used.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing a cross section of an intermediate transfer recording medium of the present invention.

FIG. 2 is a diagram schematically showing a cross section of an intermediate transfer recording medium of the present invention.

FIG. 3 is a diagram schematically showing a cross section of an intermediate transfer recording medium of the present invention.

FIG. 4 is a diagram schematically showing a cross section of an intermediate transfer recording medium of the present invention.

[Explanation of symbols]

1: Base material sheet 2: Release layer 3: Receptive layer 4,7: Adhesive layer 5: Image 6: Release layer

Claims (7)

[Claims] 1. An intermediate transfer recording medium comprising a release layer and a dye receiving layer on which an image is formed, which is provided on a base sheet, and the adhesive force F1 between the release layer and the dye receiving layer at 23 ° C. is 0. 10 to 2.0 N / 85 mm, 120 to
The adhesive force F2 between the release layer and the dye receiving layer at the time of transferring the dye receiving layer of the above-mentioned intermediate transfer recording medium to the transferred material at 160 ° C. is 0.05 to 1.0 N / 85 mm, and F1
> F2, an intermediate transfer recording medium. 2. The dye layer of a sublimation type thermal transfer sheet according to claim 1.
2. When the thermal transfer sheet is peeled off after being overlapped with the dye receiving layer of the intermediate transfer recording medium as described above, and heated by a thermal head to form an image on the dye receiving layer.
The intermediate transfer recording medium according to claim 1, wherein the adhesive force F3 at 3 ° C. is smaller than the adhesive force F1. 3. An adhesive layer and a dye receiving layer for transferring an image-bearing dye receiving layer to a transfer material by forming an adhesive layer on the dye receiving layer after image formation, and making the adhesive layer face the transfer material. The intermediate transfer recording medium according to claim 1, wherein the adhesive force F4 with the layer at 23 ° C. is larger than the adhesive force F1. 4. The intermediate transfer recording medium according to claim 1, wherein the release layer is formed of a thermosetting resin. 5. The intermediate transfer recording medium according to claim 1, wherein the release layer is formed of a thermosetting resin, and the heat curing condition at the time of forming the release layer is 100 to 115 ° C. for 5 to 120 seconds. 6. The intermediate transfer recording medium according to claim 1, wherein the substrate sheet is a polypropylene film or a polyethylene terephthalate film. 7. A printed matter on which an image is formed by using the intermediate transfer recording medium according to claim 1.