JP2920962B2 - Transfer method of formed image - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of transferring an image formed on a postcard, plain paper, cloth, plastic film, or the like.

[Prior Art] Conventionally, a photosensitive pressure-sensitive medium in which microcapsules containing a dye precursor, a photocurable resin and a photopolymerization initiator as main inclusions are carried on a surface layer, and a dye precursor which is an inclusion of the microcapsules A material that develops a color by reacting with it, a so-called developer, and a developing medium that is carried on the surface layer. After curing, the developing medium is superimposed on the photosensitive pressure-sensitive medium surface, and the uncured microcapsules are destroyed by applying pressure, thereby destroying the internal dye precursor and the developing agent of the developing medium. What reacts to form a visible image on the developer carrying surface is described in, for example, JP-A-61-17398.
It is already known from Japanese Patent Publication No. 1 and the like.

However, with this photosensitive pressure-sensitive medium, it is possible to record and form an image on a specially-developed color medium, but an image of the same quality can be printed on ordinary paper such as a postcard, cloth, PET, etc.
There is a problem that recording cannot be formed on an arbitrary material such as a film.

Therefore, the developer surface of the color developing medium and the thermoplastic resin surface of the heat-fusible sheet formed by supporting the thermoplastic resin on the base sheet are superimposed and hot-pressed. The visible image (the color developer layer on which an image is formed) is transferred to the heat-fusible sheet by peeling, and the heat-fusible sheet is transferred onto the image receiving surface of an image forming body such as a postcard or a cloth. There is a method in which a visible image (a developer layer on which an image is formed) is adhered and heated and then the base sheet of the heat-fusible sheet is peeled off. According to this transfer method, the base sheet of the color developing medium is peeled off from the visible image (the color developing agent layer on which the image is formed) and only the color developing agent layer is transferred to the image forming body. This is preferable because the finished product does not become thick.

However, in the above-described method of bonding the thermoplastic resin surface to the developer surface of the color developing medium using the heat-fusible sheet and peeling off only the color developer layer of the color developing medium, the base of the color developing medium is not used. What should be separated between the sheet and the color developer layer is that the sheet is separated between the base sheet of the heat-fusible sheet and the thermoplastic resin.

Furthermore, after the developer is peeled off and transferred to the heat-sealing sheet, the developing layer peeled off by the heat-fusible sheet is adhered to plain paper, plastic film, cloth, etc. Even if an attempt is made to peel off the base sheet of the sheet, it cannot be easily peeled off and often has an adverse effect on the image formed on the color developer layer.

Therefore, as another transfer method of a formed image, an image is formed on a developer medium having a developer layer and a thermoplastic resin layer which react with at least a dye precursor on a base sheet to form a color, and the image is formed. A method has been considered in which the formed image surface of the developer medium and the image-formed body are superimposed and heated and then only the base sheet of the developer medium is peeled off.

Details are described in the specification and drawings attached to the application of Japanese Patent Application No. 1-109760 by the inventor.

The above method is used for peeling an image layer (a color developing agent layer) from a conventional color developing medium, and after adhering a thermoplastic resin surface of the heat fusing sheet to plain paper or a plastic film. For the purpose of eliminating the trouble of peeling off the image layer and the base sheet when removing only the base sheet and the peeling of the image at that time, the developer image is easily, quickly and surely formed on plain paper, plastic film, etc. It can be formed in one transfer step.

In the above-mentioned method, a method using a heat roller or an iron is generally used as a method of superimposing the image surface of the developer medium and the image forming body on each other and applying heat and pressure to bond them.

[Problems to be Solved by the Invention] However, in this method, the temperature of a heat source such as a heat roller depends on the melting temperature of the developer itself of the developer medium or the melting temperature of the binder contained therein. There was a problem that it could not be obtained. Therefore, it has been difficult to always obtain the best image under different environmental conditions.

Furthermore, when the image is formed by a conventional method, if the temperature of a heat source such as a heat roller is low, there is a problem that peeling occurs between the image of the transferred image and the surface of the image forming object. Therefore, the image transfer product prepared by the conventional method lacks adhesiveness, and is susceptible to external force such as scratching, and the image is easily peeled.

The present invention has been made to solve the above-mentioned problems, and a first object is to reduce the temperature of a heat source such as a heat roller, further simplify the temperature control, and reduce the cost. .

A second object is to form an image transfer product that is resistant to external force such as scratching and hard to peel off an image.

[Means for Solving the Problems] In order to achieve this object, a method for transferring a formed image according to claim 1 is characterized in that a thermoplastic resin layer is carried on a base sheet and a dye precursor is provided on the thermoplastic resin layer. Adhesion in which a heat-sensitive adhesive layer is carried on a base sheet on the developer layer of the developer medium carrying a developer layer on which a color image is formed by reacting with the body. The adhesive layer of the sheet was overlapped and hot-pressed, and then only the base sheet was peeled off, and finally exposed on the image receiving surface of the image forming body on which the color image was transferred, by peeling the base sheet. The method is characterized in that the adhesive layers on the developer medium are overlapped and heated and pressed, and thereafter, only the base sheet is peeled off.

First, since the adhesive sheet has a configuration in which a heat-sensitive adhesive layer is carried on a base sheet, it does not exhibit an adhesive force in a non-heated state. Therefore, the adhesive sheet itself has storability and easy handling.

By overlaying the adhesive layer of the adhesive sheet on the developer layer of the developer medium and applying heat and pressure, the adhesive layer is heated and melted and adheres to the developer layer. For this reason, peeling of only the base sheet is easily performed.

When only the base sheet is peeled off, the adhesive layer is adhered to the color developer layer of the color developer medium. Next, when an adhesive layer of a developer medium is superimposed on the image receiving surface of the image forming body, an adhesive layer, a developer layer, a thermoplastic resin layer,
They will be arranged in the order of the base sheet. By being heated and pressed in this state, the adhesive layer is melted again and adheres to the image receiving surface to securely adhere the color developer layer on the image receiving surface, while the thermoplastic resin layer is melted. Thereby, the adhesive force between the color developer layer and the base sheet is weakened, and therefore, only the base sheet can be easily peeled off.

Therefore, the developer layer can be firmly adhered to the image receiving surface of the image-formed body even when the pressure or the amount of heat applied is small compared to the conventional art, and the image strongly adhered to external force such as scratching is hardly peeled off. .

According to a second aspect of the present invention, there is provided a method of transferring a formed image, comprising the steps of: forming a heat-sensitive adhesive layer on a base sheet on an image receiving surface of an image forming body to which a color image is to be finally transferred; The adhesive layer is overlapped and hot-pressed, then only the base sheet is peeled off, and the thermoplastic resin layer is supported on the base sheet and reacts with the dye precursor on the thermoplastic resin layer to form the color image. The adhesive layer on the image forming body exposed by peeling of the base sheet is superimposed on the developer layer of the developer medium in which the developer layer in which the developer layer is formed is pressed and hot-pressed. Thereafter, only the base sheet is peeled off.

First, an adhesive sheet carrying a heat-sensitive adhesive layer and an image forming body to which a color image is finally transferred are prepared, and the adhesive layer of the adhesive sheet is overlaid on the image receiving surface of the image forming body. When heated and pressed, the adhesive layer melts and adheres to the image receiving surface. For this reason, peeling of only the base sheet is easily performed.

When only the base sheet is peeled off, the adhesive layer is adhered to the image receiving surface of the image forming body. Next, when the developer layer of the developer medium is superimposed on the adhesive layer on the image forming body, the adhesive layer, the developer layer, the thermoplastic resin layer, and the base sheet are arranged in this order from the image receiving surface. Will be lined up. By applying heat and pressure in this state, the adhesive layer is melted again and adheres to the color developer layer to securely adhere the color developer layer on the image receiving surface,
On the other hand, when the thermoplastic resin layer is melted, the adhesive force between the color developer layer and the base sheet is weakened, so that only the base sheet can be easily peeled off.

Therefore, the developer layer can be firmly adhered to the image receiving surface of the image-formed body even when the pressure or the amount of heat applied is small compared to the conventional art, and the image strongly adhered to external force such as scratching is hardly peeled off. .

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a cross-sectional view of a developer medium used in the method of transferring a formed image of the present invention. The developer medium 1 has a thermoplastic resin 3 on a base sheet 2 and a developer layer 4 on the thermoplastic resin 3.

First, a method of forming a developed image on the developer medium 1 will be described with reference to FIGS.

FIG. 3 is an explanatory diagram of a method of forming a latent image on the photosensitive pressure-sensitive medium 10. As shown in FIG.
When irradiated through, only the microcapsules 11a of the photosensitive pressure-sensitive medium 10 corresponding to the transmission portion 20a of the original 20 are exposed,
As a result, the microcapsules 11a in that part are hardened. Thereafter, as shown in FIG. 4, if the photosensitive surface of the photosensitive pressure-sensitive medium is superposed on the developer medium and pressed using a pressure roller 40, only the uncured microcapsules 11b are destroyed, and the internal dye The precursor flows out onto the developer 4. Then, the portion develops color and forms a mirror image of the document 20.

Next, the image formed on the developer medium 1 is transferred to the image forming body 5.
The process of transferring the image to the printer will be described with reference to FIG. 1 and FIGS. 5 and 6.

As shown in FIG. 1, it is necessary to prepare an image transfer product 9 having a structure in which an adhesive layer 6 is inserted between an image forming body 5 and a developer layer 4 of a developer medium 1. Although such a method is conceivable, for example, an adhesive sheet 8 as shown in FIG. 5 is used.
This is one in which an adhesive layer 6 is carried on a base sheet 7.

First, the surface of the developer layer 4 of the developer medium 1 on which an image is formed by the above method and the surface of the adhesive layer 6 of the adhesive sheet 8 are overlapped and heated. Then, the adhesive layer 6 softens and the developer layer 4
And glue it. Then, after the base sheet 7 of the adhesive sheet 8 is peeled off, the surface of the adhesive layer 6 and the image forming body 5 such as plain paper, cloth, plastic film and the like are combined and heated and heated by the heating roller 51 as shown in FIG. Then, the adhesive layer 6 adheres to the softened image forming body, and thereafter, the base sheet 2 of the developer medium 1.
Is removed, and the developer image is transferred to the image forming body 5.
In this case, a heating roller having a feed rate of 130 ° C. of 10 mm / s is used as the heating roller.

 Image transfer formation is performed as described above.

Next, the composition of the photosensitive pressure-sensitive medium and the production method will be briefly described.

As shown in FIG. 3, the photosensitive pressure-sensitive medium 10 has a microcapsule 11 supported on a base sheet 12, and the microcapsule 11 mainly contains a photocurable resin, a photopolymerization initiator, and a dye precursor. I do. Representative examples of the photocurable resin include ethylene glycol diacrylate, ethylene glycol dimethacrylate, trimethylolpropane triacrylate, diethylene glycol dimethacrylate, and the like. Substituted benzophenone, xanthone, thioxanthone and the like, and dye precursors having a structure of lactone, lactam, spiropyran and the like, for example, triarylmethane compounds, bisphenylmethane compounds, specifically crystal violet lactone, benzoyl leuco And methylene blue. The capsule 11 of the photosensitive and pressure-sensitive medium 10 can be manufactured by a known method such as a coacervation method or an interfacial polymerization method. 50 parts, 3 parts of a dye precursor, 2.5 to 4 parts of a photopolymerization initiator. If necessary, 1 part or less of a binder and a plasticizer, and a photosensitizer of 10 parts of a polymerization initiator.
Adjust to about weight percent.

 Next, the composition and manufacturing method of the developer medium 1 will be briefly described.

As the base sheet 2 of the developer medium 1, an appropriate one having a relatively smooth surface and a positive release is used, and a polyester film, a polyethylene film, a polypropylene film or the like can be arbitrarily used. The thickness of the base sheet 2 is
About 50-200 μm can be used, and preferably about 100 μm.

Further, as the developer of the developer layer 4, any of those used for conventional photosensitive and pressure-sensitive media can be used. For example, acid clay, active viscosity, inorganic acidic substances such as kaolin, P
-There are phenolic compounds such as phenylphenol, and aromatic carboxylic acid compounds such as salicylic acid, gallic acid, and provirtannic acid, which can be used alone or in combination. A binder can be mixed with the developer in an arbitrary ratio. Further, as the resin constituting the thermoplastic resin layer 3, a substance which is softened or melted by heating and solidified by cooling is used. For example, vinyl resins such as vinyl alcohol-vinyl acetate copolymer, polyvinyl chloride, vinyl chloride, and vinyl acetate copolymer; acrylic resins such as ethyl acrylate, butyl acrylate, and methyl cyanoacrylate; styrene resins; and polyamide resins. , Wax and the like.

In this embodiment, a 75 μm polyethylene terephthalate film was used as the base sheet 2 of the developer medium 1. Styrene / acrylic resin,
A mixture of polyesters was used.

The developer layer 4 is made of acid clay, bisphenol A, P
-Phenylphenol was used.

Next, a coating method will be described. As the thermoplastic resin layer 3, a 50 wt% styrene acrylic copolymer emulsion (10%) is used.
(00 cps) and a polyester solution (500 cps) of 45 wt% were mixed and adjusted. The mixture was applied to 75 μm of polyethylene terephthalate as a base sheet, and dried in an oven at 110 ° C. for 1 minute. The film thickness after drying is 10 μm. Next, the developer layer 4
50 parts of acid clay, 30 parts of bisphenol A, and 60 parts of P-phenylphenol 30 are dispersed in 60 parts of an aqueous solution of polyvinyl alcohol as a binder to form a developer dispersion solution, which is applied onto the dried thermoplastic resin layer 3. After the application, it was dried with hot air in an oven at 80 ° C. for 1 minute, and after drying, a 15 μm color developer layer was obtained.

The base sheet 7 of the adhesive sheet 8 may be a plastic film, paper, or the like, as long as it is not deformed by a heat source such as a heat roller, but a polyethylene terephthalate film is particularly preferable. Examples of the adhesive layer 6 include vinyl resins such as vinyl alcohol / vinyl acetate copolymer, polyvinyl chloride, vinyl chloride / vinyl acetate copolymer, and acrylics such as polyethyl acrylate, polybutyl methacrylate, and polymethyl cyanoacrylate. Resins, styrene resins, polyamide resins, waxes and the like can be used.

In this embodiment, the base sheet 7 of the adhesive sheet 8 uses a polyethylene terephthalate film which has been subjected to a silicon treatment.
As the adhesive layer 6, a mixture of 10 parts of wax, 10 parts of ethylene-vinyl acetate copolymer, and 2 parts of rosin ester was applied using a hot melt applicator.

In addition, each material for realizing the method of the present invention is not limited to this embodiment, and can be selected from each material shown in the text or another material. However, it is desirable to satisfy the following conditions.

1. The adhesive strength between the base sheet 7 of the adhesive sheet 8 and the adhesive layer 6 is
The adhesive force between each material of the base sheet 2 of the developer medium 1, the thermoplastic resin layer 3, the developer layer 4, and the adhesive layer 6 of the adhesive sheet 8 is smaller than any of the adhesive forces.

2. The adhesive strength between the base sheet 2 of the color developing medium 1 and the thermoplastic resin layer 3 is determined by the thermoplastic resin 3 of the color developing medium 1, the color developing agent layer 4, the adhesive layer 6 of the adhesive sheet 8, and the image forming object. 5, the adhesive force between each material is small.

In the present embodiment, the adhesive layer 6 is adhered to the color developing medium 1. However, the image forming body 5 and the adhesive sheet 8 are heated and pressed in advance.
The base sheet 7 may be peeled off and the adhesive layer 6 may be supported.

[Effects of the Invention] As is clear from the above description, according to the present invention, it is possible to use even a low temperature, and the developer layer on which an image has been formed can be extremely simply and easily placed on the image receiving surface of the image forming body. It has a very practical effect that it can be firmly adhered and is hardly peeled off by external force such as scratching.

[Brief description of the drawings]

1 to 6 show an embodiment embodying the present invention. FIG. 1 is a perspective view of an image transfer, and FIG. 2 is a cross-sectional view of a color developing medium used in the above embodiment. FIG. 3 is an explanatory view of a method of forming a latent image on a photosensitive and pressure-sensitive medium, FIG. 4 is an explanatory view of a method of forming a visible image on a developing medium, FIG. 5 is a perspective view of an adhesive sheet, FIG. FIG. 6 is an explanatory diagram of a process of transferring an image to an image forming body. In the figure, 1 is a developer medium, 2 is a base sheet, 3 is a thermoplastic resin layer, 4 is a developer layer, 5 is an image forming body, and 6 is an adhesive layer.

Claims (2)

(57) [Claims] 1. A developed color comprising a thermoplastic resin layer carried on a base sheet, and a color developer layer on which a color image is formed by reacting with a dye precursor is carried on the thermoplastic resin layer. The developer layer of the developer medium, the adhesive layer of an adhesive sheet comprising a heat-sensitive adhesive layer carried on a base sheet is superposed and hot-pressed, and then only the base sheet is peeled off. Finally, the adhesive layer on the developer medium exposed by peeling of the base sheet is superimposed on the image receiving surface of the image forming body on which the color-formed image is transferred, and hot-pressed, and then the base sheet A method for transferring a formed image, comprising the steps of: 2. An adhesive sheet comprising a base sheet and a heat-sensitive adhesive layer carried thereon, the adhesive layer being superposed on an image receiving surface of an image forming body to which a color image is finally transferred. Hot-pressing, then peeling off only the base sheet, a thermoplastic resin layer supported on a base sheet, and a color developer layer on which the color-developed image is formed by reacting with a dye precursor on the thermoplastic resin layer On the developer layer of the developer medium, the adhesive layer on the image forming body exposed by peeling of the base sheet is superimposed and hot-pressed, and then only the base sheet is applied. A method for transferring a formed image, which comprises separating.