JP2005298979A - Method for transferring image by using a transfer sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for transferring an image recorded on a transfer sheet surely on a material to be transferred, without damaging the color density of the image recorded on a colored transfer layer of the transfer sheet, and without forming disorder such as the peeling or cracking of the transfer layer transferred on the material to be transferred. <P>SOLUTION: This method for transferring the image is constituted by recording the image on the transfer layer by using a transfer sheet constituted of a substrate and the transfer layer capable of being released from the substrate, having heat-adhesion property and being colored, and then in a state of overlapping the surface side of the transfer layer, on which the image of the transfer layer is not recorded, on the material to be transferred, heating/compressing from the surface side of the material to be transferred which is not adhered with the transfer layer. Then, by heating/compressing from the surface side of the material to be transferred not adhered with the transfer layer, the transfer layer is strongly transferred, and it is possible to transfer the image together with the transfer layer on the material to be transferred without damaging the color density of the image recorded on the transfer layer together with the transfer layer. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an image transfer method for a transfer sheet, which can form an image on a transfer medium without losing the color density of the image during transfer.

  As a method of forming marks, logos and images on the surface of T-shirts and other fabrics, ceramics, plastic products, etc., a transfer sheet, that is, a peelable transfer layer made of a heat-melting resin, is formed on the substrate. A method using a sheet is widely used. In this method, after an image is recorded on a transfer layer of a transfer sheet, the transfer layer is melt-peeled by heating from a base material and thermally transferred to a transfer material such as a cloth, thereby forming an image on the transfer material. It is. In particular, the image forming method using a transfer sheet is easy to make full-color images with color copying machines and color printers such as an electrophotographic recording method and an ink jet recording method. On the other hand, since image formation becomes possible, image formation on various media using such a transfer sheet has attracted attention. In image formation using a transfer sheet, it is necessary to form a clear image regardless of the type of transfer target. For example, it is required that a clear image can be formed even with a dark transfer target.

  The sharpness and color tone of the image formed on the transfer medium using the transfer sheet are affected by the color of the transfer medium. In particular, when the transfer target is a dark color such as black, the influence is large. For this reason, a method has been proposed in which an image is formed on a transfer medium using a transfer sheet having a performance of hiding the color of the transfer object.

  For example, Japanese Patent Application Laid-Open No. 2002-248875 (Patent Document 1) discloses a transfer sheet composed of a base material and a transfer layer that can be peeled off from the base material. After recording an image on the image receiving layer of this transfer sheet using a positive image type transfer sheet comprising a white hiding agent in at least one of the adhesive layer and the image receiving layer. A method of thermally transferring a recorded image by peeling a base material from an adhesive layer, bringing the release surface of the adhesive layer into contact with a transfer target, and pressurizing and heating the image receiving layer with a heating sliding member such as an iron. Is disclosed.

  In the method described in Patent Document 1, an image can be formed without being affected by the color of the transfer target. However, in order to satisfactorily form an image on a transfer medium such as a fabric using a transfer sheet, the transfer layer is softened and melted while applying an appropriate heating temperature and pressure to the transfer sheet, and the transfer sheet is formed. In this method, since the transfer layer needs to be sufficiently adhered to the transfer layer, the transfer layer is softened and melted by heating and pressurizing, and the recorded image is transferred to the transfer layer (particularly, the transfer layer containing a white hiding agent in the image receiving layer). ) And the color density of the image transferred to the transfer medium together with the transfer layer is impaired. In addition, when the heating and pressurizing conditions are weakened so as not to impair the color density of the image, the degree to which the color density is impaired is reduced, but the adhesion state of the transfer layer to the transfer target is weakened. Therefore, in this method, there is a risk that the transferred image may be peeled off or cracked (crack after washing, etc.) during and after transfer, and the image can be reliably transferred to the transfer target such as cloth. Have difficulty.

JP 2002-248875 A (claim 14, paragraph number [0113])

  Accordingly, an object of the present invention is to provide a method for reliably transferring an image recorded on a transfer sheet to a transfer medium without impairing color density.

  Another object of the present invention is to transfer an image recorded on a transfer sheet to a transferred material so that the image transferred to the transferred material is not peeled off or cracked even when used for a long time. It is to provide a method.

  As a result of intensive investigations to achieve the above-mentioned problems, the inventors of the present invention heated the transfer sheet from the transfer target side during transfer of the transfer sheet, thereby preventing the image color density from being impaired during transfer and after transfer. Thus, the present invention has been completed.

  That is, the image transfer method of the present invention comprises a substrate and a transfer layer that is peelable and colored with respect to the substrate, and the transfer layer can receive an image and has thermal adhesiveness. A method of recording an image on one side of a transfer layer using a transfer sheet, and then transferring the image (including marks, logos and characters) together with the transfer layer to a transfer medium, from the transfer layer to the substrate The surface of the transfer layer on which the image is not recorded is brought into contact with the transfer target, and then the transfer layer is heated from the transfer target side in a state where the transfer layer and the transfer target are in close contact with each other. Alternatively, the image may be transferred to the transfer body by thermally bonding the image to the transfer body.

  A method for recording an image on the transfer layer includes an ink jet recording method (such as an ink jet method in which ink droplets are ejected from a nozzle toward the transfer layer), a hot melt transfer recording method, a sublimation thermal transfer recording method, an electrophotographic recording method ( A method of recording an image using a recording method of a color copying machine or a color laser printer) may be used.

  Further, the heating method from the transferred body side is adjusted to a method in which the heated body is heated from the surface side not in close contact with the transfer layer of the transferred body, for example, a temperature at which heat transfer is possible (for example, 80 to 200 ° C.). For example, a method may be used in which the heated body is heated while being pressed with an appropriate pressure (about 980 to 98000 Pa) from the side of the transfer target that is not in close contact with the transfer layer. In addition, during heating, if necessary, heating is performed with the release processing surface of the release paper in contact with the surface on which the image of the transfer layer is recorded, and the image is transferred by peeling the release paper after heating. May be.

  The transfer sheet is composed of a base material and a transfer layer that can be peeled from the base material, and the transfer layer may be partially or entirely colored (for example, colored white), The transfer layer may be composed of an image receiving layer capable of recording an image and an adhesive layer having thermal adhesiveness, and the image receiving layer may be colored.

  The image transfer method of the present invention is a method for transferring an image recorded on one side of a transfer layer to a transfer medium using a transfer sheet composed of a colored transfer layer, the transfer layer The other surface side of the substrate is brought into contact with the transfer body and temporarily fixed at the transfer position of the transfer body, and then the transfer layer is heated from the transfer body side while the transfer layer and the transfer body are in close contact with each other to transfer the transfer layer. A method may be used in which an image is transferred to a transfer target body by heat bonding to the body.

  The temporary fixing method may be a method in which heat bonding is performed by heating at a relatively low temperature to the extent that thermal adhesion occurs in the transfer layer, using the heat bonding property of the transfer layer. When the transfer layer is temporarily fixed by thermal bonding, the transfer layer and the transfer target may be thermocompression bonded.

  The present invention relates to a method for transferring an image recorded on one side of a transfer layer to a transfer medium using a transfer sheet composed of a colored transfer layer, the other side of the transfer layer. After the side is brought into contact with the transfer target, the transfer layer and the transfer target layer are heated so that the transfer layer and the transfer target layer are in close contact with each other. Alternatively, a method may be used in which the temperature is measured and / or the heating temperature from the transfer target is adjusted according to the temperature change, and the transfer layer is thermally bonded to the transfer target to transfer the image to the transfer target. .

  As the method for measuring the heating temperature, for example, a contact-type or non-contact type temperature measurement method that is usually used may be used.

  In the image transfer method of the transfer sheet of the present invention, heat transfer is performed by heating from the transfer target side, so that the image can be transferred to the transfer target without impairing the color density. Further, in the image transfer method of the transfer sheet of the present invention, the transfer layer is temporarily fixed at the transfer position of the transfer target before transfer, so that the image can be transferred to the transfer target without shifting the transfer position. Furthermore, in the image transfer method of the transfer sheet of the present invention, the heating during transfer is adjusted by the temperature of the surface on which the image of the transfer layer is recorded, so that the image can be transferred under an appropriate temperature condition and used for a long time. However, a stable image can be transferred without causing problems such as peeling or cracking of the image formed on the transfer target.

[Image transfer method]
The image transfer method of the present invention comprises a base material and a transfer layer that is peelable and colored with respect to the base material. The transfer sheet is capable of receiving an image and has thermal adhesiveness. After recording an image on one side of the transfer layer using a transfer layer, the image is transferred to the transfer target body together with the transfer layer, and the image of the transfer layer is recorded by peeling the substrate from the transfer layer. The uncoated surface side is brought into contact with the transfer target, and then the transfer layer and the transfer target are in close contact with each other and heated from the transfer target side to thermally bond the transfer layer to the transfer target and cover the image. This is a method of transferring to a transfer body. A part or all of the transfer layer may be colored. The transfer sheet may be composed of a base material and a transfer layer that can be peeled off from the base material. Before the transfer layer is brought into contact with the transfer target, the base material is peeled off from the transfer sheet, and then transferred. A method may be used in which the surface of the layer from which the substrate is peeled is brought into contact with the transfer target, and the image is transferred to the transfer target by the transfer method described above.

  The image transfer method of the present invention comprises a base material and a transfer layer that is peelable and colored with respect to the base material. The transfer sheet is capable of receiving an image and has thermal adhesiveness. And transferring the image recorded on one side of the transfer layer together with the transfer layer to the transfer body using the recording method or the like, wherein the other side of the transfer layer is in contact with the transfer body After temporarily fixing the transfer layer to the transfer position of the transfer target, heat the transfer layer and the transfer target in a state where the transfer layer and the transfer target are in close contact, and thermally bond the transfer layer and the transfer target layer. A method of transferring an image to a transfer target may be used.

  The image transfer method of the present invention is a method of transferring an image recorded on one surface side of a transfer layer to a transfer medium using a transfer sheet composed of a transfer layer partially or entirely colored. The transfer layer is in contact with the transfer layer while the other surface side of the transfer layer is brought into contact with the transfer target, and then the temperature of the transfer layer on which the image is recorded is measured. A method of transferring an image formed by a process of heating from the body side and adjusting the heating according to the measured value of the temperature and / or a change thereof to thermally bond the transfer layer and the transfer layer to the transfer target. There may be.

(Image recording method)
As a method for recording an image on the transfer layer used in the image transfer method of the present invention, an image (including marks, logos, and characters) is recorded on the transfer layer before transfer with a writing instrument such as oil-based, water-based, or ink pen. In addition to methods, inkjet recording methods (such as inkjet methods that eject ink droplets from nozzles to sheets), thermal melt transfer methods, sublimation thermal transfer methods, and electrophotographic methods (for example, color copiers and color laser printers) Examples thereof include a method for recording a toner image.

(Heating method)
The method of heating from the transferred material side is not particularly limited as long as it is a heating method other than the method of heating from the surface side on which the image of the transfer layer is recorded at the time of transfer. For example, the transfer layer and the transferred material are brought into contact with each other. After that, heating may be performed at a temperature at which heat transfer can be performed from the side of the transfer target that is not in close contact with the transfer layer. It may be a method, or may be a method in which a previously heated object to be transferred is heated by bringing it into close contact with the transfer layer.

  As a method of heating the transfer layer and the transfer target after contact with the transfer layer, the surface of the transfer target that is not in close contact with the transfer layer is heated to a temperature at which heat transfer is possible, for example, 80 to 200 ° C., preferably 100 to 180. A heating body adjusted to a temperature of 100 ° C., more preferably 110 to 150 ° C., is brought into contact with the surface of the transfer target that is not in close contact with the transfer layer, and an appropriate pressure, for example, about 980 to 98000 Pa, preferably 5000 to It may be a method of heating while pressing against the transfer body at a pressure of 80000 Pa, more preferably 10000 to 60000 Pa. Examples of the heating body include a hot plate of a heat press device, and a business or household iron. The heating time by the heating body is not particularly limited as long as it can be thermally transferred, and depends on the temperature and pressure at the time of heating, but is usually calculated after bringing the heating body into contact with the transferred body, for example, It may be 3 seconds or longer (3 to 120 seconds), preferably about 5 seconds to 60 seconds.

(Temporary fixing method)
In the thermal transfer process, the temporary fixing method may be as long as the transfer layer is fixed at a position (transfer position) where the transfer target is desired to be transferred, a fixing method using mechanical means, or fixing using an adhesive / adhesive means. It may be a method such as a method or a fixing method utilizing the thermal adhesiveness of the transfer layer. As a fixing method using the mechanical means, for example, with the transfer layer superimposed on the transfer position of the transfer target, the transfer layer is fixed to the transfer position of the transfer target using a clip or a stop pin. The method of doing can be illustrated. As the fixing method using the adhesive / adhesive means, for example, there is a method of fixing the transfer layer to the transfer position of the transfer object using an adhesive tape or an adhesive in a state where the transfer layer is superimposed on the transfer position of the transfer object. It can be illustrated. Further, as a method for fixing using the thermal adhesiveness of the transfer layer, for example, a fixing method in which the transfer layer is heated at a relatively low temperature to the extent that thermal adhesiveness is exhibited and temporarily bonded to the transfer target is exemplified. it can. As a method of temporary bonding using the thermal adhesiveness, the temperature at which the transfer layer can be thermally bonded, for example, 60 to 180 ° C., preferably 80 to 160 ° C., more preferably 100 to 150 ° C. was adjusted. The heated body is brought into contact with the surface of the transfer target that is not in close contact with the transfer layer, and the transfer target is subjected to an appropriate pressure, for example, about 980 to 98000 Pa, preferably 5000 to 80000 Pa, more preferably 10,000 to 60000 Pa. It may be a method of temporarily adhering while pressing. Examples of the heating body include a hot plate of a heat press device, and a business or household iron. The heating time by the heating body is not particularly limited as long as it can be thermally transferred, and depends on the temperature and pressure at the time of heating, but is usually calculated after bringing the heating body into contact with the transferred body, for example, It may be 1 second or longer (1 to 60 seconds), preferably about 3 seconds to 30 seconds. Among these temporary fixing methods, there is no risk of partial heating failure during transfer due to partial interposition of members other than the transfer sheet, image damage after transfer due to the temporary fixing member, and poor texture of the transfer site. A temporary fixing method using the thermal adhesiveness of the transfer layer is preferred.

(Temperature measurement method)
The method for measuring the temperature is not particularly limited as long as it can measure the temperature of the surface on which the image of the transfer layer is recorded. For example, a contact type (for example, thermocouple method) and a non-contact type (for example, Examples of the temperature measuring method that is usually used (radiation type thermometer method, etc.) can be exemplified, and these measuring methods may be appropriately selected according to the mode of transfer. The temperature measurement position is preferably measured over the entire surface of the transfer layer, but may be measured with a spot at an appropriate interval. When a releasable sheet-like substrate (for example, release treated paper) is interposed between the heating body and the transfer layer during transfer, the surface temperature of the releasable sheet-like substrate is measured. It may be replaced. In the temperature measurement, the temperature and its temperature change may be measured, and the heating during transfer may be adjusted according to the measured value (temperature and / or value of the temperature change). As a method for adjusting the heating, for example, when thermal transfer is performed using a heating device that adjusts the heating with an electric circuit as a heating source, the measured temperature and / or the value of the change in the measured temperature is used as an electric signal in the electric circuit of the heating device. The electric circuit which transmitted and received the said electrical signal can illustrate the heating method which raises and lowers the heating state of a heating apparatus according to the electrical signal. In this way, transfer can be performed while adjusting the heating temperature at the time of transfer according to the temperature of the surface on which the image of the transfer layer is recorded and / or the temperature change thereof, so that a better image that does not impair the color density is covered. It can be transferred to a transfer body.

  The transfer sheet and image recording method used in the present invention are exemplified below.

[Transfer sheet]
The transfer sheet used in the present invention is composed of a transfer layer capable of recording an image and having thermal adhesiveness, and a transfer sheet in which a part or all of the transfer layer is colored is used. The transfer layer may be composed of an image-receiving layer capable of recording an image, a colored layer containing a colorant (for example, a white pigment) and a binder resin, and an adhesive layer having thermal adhesion, and functions of these layers. May be composed of layers merging each other. Moreover, the said transfer sheet may be comprised by the transfer layer which can peel with respect to a base material and a base material.

(Base material)
Examples of the base material include paper, cloth (woven fabric, non-woven fabric, etc.), chemical fiber paper, synthetic paper, plastic film, and the like, and usually a releasable base material such as release treated paper (release paper). Synthetic paper, chemical fiber paper, plastic film, etc., which may be subjected to release treatment, are used.

(Transfer layer)
The transfer layer usually contains a hot melt adhesive resin. The shape of the hot melt adhesive resin is not limited, but may be particulate. Examples of the hot melt adhesive resin (including adhesive particles) contained in the transfer layer include polyamide resins, thermoplastic polyurethane resins, polyester resins, olefin resins, and the like. The above may be combined. The melting point or softening point of the hot-melt adhesive resin is not particularly limited, but is about 40 to 200 ° C, preferably about 60 to 150 ° C.

  The transfer layer is partly or entirely colored, and includes, for example, a colorant (for example, a white pigment) and a binder resin, and increases the whiteness of the transfer layer or conceals the color of the transfer target. You may have.

  In addition to the hot-melt adhesive resin (including the adhesive particles), the transfer layer includes a film-forming resin component (such as a hydrophilic polymer, a urethane-based resin, a thermosetting or cross-linkable resin), and a dye fixing. It is often composed of an agent [cationic compound (low molecular dye fixing agent), high molecular dye fixing agent, etc.].

  In addition, the transfer layer may contain various additives (stabilizers (antioxidants, ultraviolet absorbers, heat stabilizers, etc.), dyes, pigments, antistatic agents, flame retardants, lubricants, antiblocking agents as necessary. , Fillers, colorants, antifoaming agents, applicability improvers, thickeners, etc.).

  The thickness of the transfer layer is, for example, about 10 to 300 μm, preferably about 20 to 250 μm, and more preferably about 30 to 200 μm.

[Transfer]
Examples of the transfer target include two-dimensional or three-dimensional structures formed of various materials such as fiber, paper, wood, plastic, ceramics, and metal. In the present invention, a cloth (for example, a T-shirt), a plastic film sheet, or paper (particularly a cloth) can be suitably used as the transfer target.

  The image transfer method of the present invention can be effectively used as a method of transferring an image to a transfer medium such as a fabric using a transfer sheet capable of recording an image by an electrophotographic method or the like.

  Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples. In the text, “parts” means “parts by weight” unless otherwise specified. In addition, the transfer sheet, the transfer target, and the reading document used in Examples and Comparative Examples are as follows. Furthermore, evaluation methods for various characteristics of images transferred to a transfer medium together with a transfer layer (a layer composed of an image receiving layer and an adhesive layer) of a transfer sheet by the image transfer methods of Examples and Comparative Examples are as follows. is there.

[Transfer sheet]
As the transfer sheet, a transfer layer composed of a base material and a white transfer layer was used. The transfer layer is composed of an image receiving layer and an adhesive layer. The contents of the substrate, the adhesive layer and the image receiving layer of the transfer sheet are as follows.

(Base material)
Substrate: Release-treated paper (manufactured by Lintec Corporation, SGP85OKT-T, basis weight: 100 g / m ² , thickness: 90 μm)

(Adhesive layer)
Polyester urethane resin solution A [manufactured by Dainichi Seika Kogyo Co., Ltd., Resamine UD1305, solvent: dimethylformamide / methyl ethyl ketone = 40/60 (weight ratio), solid content 50 wt% , 80 parts of softening temperature and polyester urethane resin solution B [manufactured by Dainichi Seika Kogyo Co., Ltd., Resamine ME3119LP, solvent: dimethylformamide / methyl ethyl ketone = 35/65 (weight ratio), solid content 50% by weight, softening Apply a coating solution prepared by adding dimethylformamide to a resin solution mixed with 20 parts at a temperature of 95 ° C. to adjust the solid content to 35% by weight and dry the coating solution to a dry coating amount of 35 g / m ^2. Formed.

(Image receiving layer)
On the adhesive layer, a titanium oxide-containing carbonate-based urethane resin solution A [manufactured by Dainichi Seika Kogyo Co., Ltd., Seika Seven BS012 (S) white, urethane-based resin / titanium oxide = 9/1 (weight ratio), solvent : 65 parts by weight of dimethylformamide, solid content 55% and polyester urethane resin solution A [manufactured by Dainichi Seika Kogyo Co., Ltd., Resamine UD1305, solvent: dimethylformamide / methyl ethyl ketone = 40/60 (weight ratio), solid content 50 A coating solution prepared by adding dimethylformamide to a resin solution mixed with 35 parts by weight and a softening temperature of 95 ° C. was adjusted to a solid content of 30% by weight, and applied and dried to a dry coating amount of 40 g / m ^2. Thus, an image receiving layer was formed.

[Scanning Document]
Using an inkjet printer (Canon, PIXUS990i), printing paper (Canon, Canon Glossy Paper GP-401) is printed on cyan (C), magenta (M), yellow (Y), black (B ) A solid image of each color of ink was printed to prepare a reading document.

[Transfer]
A black T-shirt (manufactured by Arai Seitaro Co., Ltd., J6650) was used as the transfer target.

[Color density]
Three measurement positions of color density are arbitrarily determined in each color solid image of the reading document, and the color density of these measurement positions is determined by a reflection color densitometer (Dareta Macbeth reflection color densitometer RD-19, manufactured by Sakata Inx Corporation). The average value of each color was calculated. Further, for each color solid image transferred to the transfer medium together with the transfer layer by the image transfer method of the example and the comparative example, the color density is measured at a position corresponding to the measurement position of the reading document, and the average value of each color is calculated. did. The average value of the color density of each color solid image of the reading document is 1.1 for cyan (C), 1.1 for magenta (M), 1.1 for yellow (Y), and 1.4 for black. there were.

[Washing resistance]
After transferring each color solid image together with the transfer layer to the transfer target material by the image transfer method of Examples and Comparative Examples, using a household washing machine (manufactured by Sanyo Electric Co., Ltd.), commercially available in 15 liters of hot water at a temperature of 30 ° C. Was added at a concentration of 1 g / liter, and the transfer material was washed by washing in 15 cycles of washing, 20 minutes of rinsing and 5 minutes of dehydration, and then air-dried. The transfer layer transferred to the dried transfer material was visually observed, and the washing durability was evaluated according to the following criteria.

○: There is no crack or peeling in the transfer layer.
X: There exists a crack and peeling in a transfer layer.

Example 1
Using a color laser copying machine (manufactured by Canon Inc., color laser copier CLC 1130, thick paper mode: 157 g / m ² ), a solid toner image of the reading document was recorded on the side of the image receiving layer of the transfer sheet. After that, the base material is peeled off from the transfer sheet, the adhesive layer side surface of the transfer layer is superposed on the surface of the transfer object at a predetermined position, and the release paper is placed on the image receiving layer side surface (side on which the toner image is recorded) of the transfer sheet. A transfer sheet of the release paper in a state in which the release treatment side of KA7W White (V10), manufactured by Lintec Corporation, silicon mold release treatment, basis weight: 60 g / m ² , thickness: 50 μm is overlaid. For 1 second using a heat press machine (Okuno Electric Industry Co., Ltd., AF-43T, set temperature: 120 ° C., pressurization condition: pressurization scale setting 1 (4.9 kPa)) The transfer layer was temporarily fixed to the transfer body by thermocompression bonding and heat bonding. Thereafter, a heat press machine (manufactured by Okuno Electric Industry Co., Ltd., AF-43T, set temperature: 120 ° C., pressurization condition: pressurization scale setting 5 (39 kPa)) is further applied from the non-thermally bonded surface side of the transfer object. The toner image was transferred onto the transfer medium together with the transfer layer by thermocompression bonding for 10 seconds. When the surface temperature of the image-receiving layer side surface of the transfer layer was measured with a thermocouple thermometer (K type) when heat-pressed from the non-thermally bonded surface side of the transfer object, the surface temperature exceeded 110 ° C. There wasn't. The average color density of the transferred toner image is 1.1 for cyan (C), 1.1 for magenta (M), 1.1 for yellow (Y), and 1.3 for black. The color density of the solid image of the original was almost the same. Moreover, the evaluation result of the washing resistance after the transfer was “◯”.

Comparative Example 1
In the same manner as in Example 1, a toner image was recorded on the side of the image receiving layer of the transfer sheet. After that, the base material is peeled off from the transfer sheet, the adhesive layer side surface of the transfer layer is superposed on the surface of the transfer object at a predetermined position, and the release paper is placed on the image receiving layer side surface (side on which the toner image is recorded) of the transfer sheet. A transfer sheet of the release paper in a state in which the release treatment side of KA7W White (V10), manufactured by Lintec Corporation, silicon mold release treatment, basis weight: 60 g / m ² , thickness: 50 μm is overlaid. 10 seconds using a heat press machine (Okuno Electric Industry Co., Ltd., AF-43T, set temperature: 100 ° C., pressurization condition: pressurization scale setting 1 (4.9 kPa)) from the surface side where no contact is made The toner image was transferred onto a transfer medium together with the transfer layer by thermocompression bonding. The average color density of the transferred toner image is 1.1 for cyan (C), 1.1 for magenta (M), 1.1 for yellow (Y), and 1.4 for black. The color density was the same as that of the solid image of the original, but the evaluation result of the washing resistance after the transfer was “x”.

Comparative Example 2
In the same manner as in Example 1, a toner image was recorded on the side of the image receiving layer of the transfer sheet. After that, the base material is peeled off from the transfer sheet, the adhesive layer side surface of the transfer layer is superposed on the surface of the transfer object at a predetermined position, and the release paper is placed on the image receiving layer side surface (side on which the toner image is recorded) of the transfer sheet. A transfer sheet of the release paper in a state in which the release treatment side of KA7W White (V10), manufactured by Lintec Corporation, silicon mold release treatment, basis weight: 60 g / m ² , thickness: 50 μm is overlaid. From the surface side where no contact is made using a heat press machine (Okuno Electric Industry Co., Ltd., AF-43T, set temperature: 120 ° C., pressurization condition: pressurization scale setting 5 (39 kPa)) for 10 seconds. Then, the toner image was transferred onto the transfer material together with the transfer layer. The average values of the color densities of the transferred toner images are 0.9 for cyan (C), 0.8 for magenta (M), 0.9 for yellow (Y), and 1.2 for black. The color density was lower than that of the solid image of the original. Moreover, the evaluation result of the washing resistance after the transfer was “◯”.

As is clear from these facts, compared to the image transfer method of the comparative example, the image transfer method of the embodiment reliably transfers the image together with the transfer layer without impairing the color density of the image after transfer. Can be transferred to.

Claims (3)

  The transfer layer is composed of a base material and a transfer layer that is peelable and colored with respect to the base material. After the image is recorded on the surface side of the substrate, the image is transferred together with the transfer layer to the transfer body, and after the substrate is peeled from the transfer layer, the surface side of the transfer layer on which the image is not recorded is A method of transferring an image to a transfer body by bringing the transfer layer into contact with the transfer body, then heating the transfer layer and the transfer body in close contact with each other, and heating the transfer layer to the transfer body. .   The surface of the transfer layer on which the image is not recorded is brought into contact with the transfer target, the transfer layer is temporarily fixed to the transfer target, and then heated from the transfer target side to thermally bond the transfer layer to the transfer target. The method according to claim 1, wherein the image is transferred to a transfer medium. 2. The method according to claim 1, wherein the temperature on the surface side on which the image of the transfer layer is recorded and / or the heating temperature from the transferred material side is adjusted according to the temperature change.