JPH03144563A - Image transferring and forming method - Google Patents

Abstract

PURPOSE:To lower the temperature of a heat source, to simplify the control of temperature and to reduce a cost by interposing an adhesive layer between the surface of a body where an image is formed and an image formed surface and forming an image transferred substance. CONSTITUTION:A color developer medium 1 has thermoplastic resin 3 on a base sheet 2 and a color developer layer 4 on the thermoplastic resin 3. Then, the image transferred substance 9 having such structure that the adhesive layer 6 is interposed between the body where the image is formed 5 and the color developer layer 4 of the medium 1 is formed. When the image formed on the color developer medium 1 is superposed and stuck on the surface of the body where the image is formed, both of them are firmly stuck even though pressurizing force or heating value applied at the time of adhesion is small. Thus, the device is used even when the temperature of the heat source is low at the time of transferring the image. Furthermore, the control of temperature is simplified and the cost is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an image transfer forming method for forming images on postcards, plain paper, cloth, plastic films, and 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 the surface layer, and a dye precursor as the inclusions in the microcapsules have been conventionally used. It consists of a color developing medium whose surface layer carries a substance that develops color by reacting with a substance, a so-called color developer, and the surface of the photosensitive and pressure sensitive medium is irradiated with light based on image information, and the irradiated light causes the photocurable resin to After that, the uncured microcapsules are destroyed by superimposing a color developing medium on the surface of the photosensitive pressure sensitive medium and applying pressure, thereby separating the dye precursor inside and the developer of the color developing medium. For example, a method for forming a visible image on a developer-carrying surface by reacting with
This is already known from Publication No. 3981 and the like.

However, although it is possible to record and form images on a specially processed color developing medium using this photosensitive and pressure sensitive medium,
Images of the same quality as this can be printed on regular paper such as postcards, cloth, or PET.
There was a problem in that recording could not be formed on arbitrary materials such as film.

Therefore, the developer-supporting surface of the color developing medium and the thermoplastic resin-supporting surface of a heat-fusible sheet made of a base sheet supporting a thermoplastic resin are overlapped and hot-pressed, and the color is developed on the heat-fusible sheet side. There is a method in which only the visible image surface of the medium is transferred, a heat-fusible sheet on which the visible image is adhered is attached to the surface of the image-forming object, and then the base sheet of the heat-fusible sheet is peeled off. It is considered.

However, in the method of using the above-mentioned heat-fusible sheet to adhere the thermoplastic resin surface to the developer image surface of the color developer medium and peeling off only the color developer layer of the color developer medium, In some cases, separation occurred between the base sheet of the heat-fusible sheet and the thermoplastic resin where separation should occur between the support and the color developer layer.

Furthermore, after peeling off the developer and transferring it to a heat-fusible sheet, the peeled developer surface is adhered to plain paper, plastic film, cloth, etc. using a heat-fusible sheet, and the heat-fusible Even when the base sheet of the sheet is to be peeled off, it cannot be easily peeled off, and the image formed on the color developer layer is often adversely affected.

Therefore, as another image transfer forming method, an image is formed on a color developer medium having a color developer layer and a thermoplastic resin layer that react with at least a dye precursor to develop color on a base sheet. A method has been devised in which the image surface of the color developer medium and the object to be imaged are superimposed and hot pressed, and then only the base sheet of the color developer medium is peeled off.

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

The above method is used when peeling off the image layer from a conventional color developing medium, and when removing only the base sheet of the heat-fusible sheet after adhering the thermoplastic resin surface of the heat-fusible sheet to plain paper or plastic film. The object of the present invention is to eliminate the trouble of peeling off the image layer or base sheet and the peeling of the image at that time,
This is an image transfer forming method that can easily, quickly, and reliably form a developer image on plain paper, plastic film, etc. in a single transfer process.

In the above method, a heat roller or an iron is generally used to superimpose the image surface of the color developer medium and the image-forming object and bond them by heat-pressing.

[Problems to be Solved by the Invention] However, in this method, the temperature of the heat source, such as a heat roller, depends on the developer itself in the developer medium or the melting temperature of the binder contained therein, so it is difficult to obtain the desired image at low temperatures. There were problems such as not being able to obtain Therefore, it has been difficult to consistently obtain the best images under different environmental conditions.

Further, when the conventional method is used, if the temperature of the heat source such as a heat roller is low, there is a problem in that peeling occurs between the image of the image transfer material and the surface of the image-forming object. Therefore, image transfers created by conventional methods lack adhesiveness,
The image was susceptible to external forces such as scratching and easily peeled off.

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

A second object is to provide an image transfer forming method that forms an image transfer material that is resistant to external forces such as scratching and is resistant to peeling of the image.

[Means for Solving the Problems] In order to achieve this object, the image transfer forming method of the present invention includes a color developer layer that reacts with at least a dye precursor to develop a color on a base sheet, and a thermoplastic resin. The method is characterized in that an image is formed on a color developer medium having a layer, the image forming surface of the color developer medium and the image-forming object are adhered, and then only the base sheet of the color developer medium is peeled off. The gist of the image transfer forming method is to form an image transfer material by inserting an adhesive layer between the surface of the object to be imaged and the image forming surface.

[Function] In the method of the present invention having the above-mentioned configuration, the image formed on the color developer medium is overlapped with the surface of the image-forming object and adhered. At this time, an adhesive layer is interposed between the image forming object surface and the image forming layer.

As a result, even if the pressure applied or the amount of heat applied during bonding is less than in the past, the two will be firmly bonded. Thereafter, the base sheet is peeled off to obtain an image transfer product.

In this image transfer material, an adhesive layer is interposed between the surface of the image-forming object and the image-forming layer, and the two are firmly adhered to each other, so that even if an external force such as scratching is applied, the two will not separate.

[Example] Hereinafter, an example embodying the present invention will be described with reference to the drawings.

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

First, a method for forming a color developing image on the color developer medium 1 will be explained according to FIGS. 2 to 4.

FIG. 3 is an explanatory diagram of a method of forming a latent image on the photosensitive pressure sensitive medium 10. As shown in the figure, when light from a light source 3° is first irradiated through the original 20, only the microcapsules lla of the photosensitive pressure-sensitive medium 1o corresponding to the transparent portion 20a of the original 2° are exposed. 1.1 a hardens. Thereafter, as shown in FIG. 4, when the photosensitive surface of the photosensitive pressure sensitive medium is overlapped with the color developer medium and pressure is applied using a pressure roller 4O, only the uncured microcapsules Ilb are destroyed, and the dye inside is The precursor flows onto the developer 4. Then, that portion develops color and forms a mirror image of the document 20.

Next, the process of transferring the image formed on the color developer medium 1 to the image forming object 5 will be explained using FIG. 1 and FIGS. 5 and 6.

As shown in FIG. 1, in order to create an image transfer material 9 having a structure in which an adhesive layer 6 is inserted between an image forming body 5 and a color developer layer 4 of a color developer medium 1, Although the above method is conceivable, for example, an adhesive sheet 8 as shown in FIG. 5 is used. This has an adhesive layer 6 supported on a base sheet 7.

First, the four sides of the color developer layer of the color developer medium 1 on which an image has been formed by the above method and the six sides of the adhesive layer of the adhesive sheet 8 are superimposed and hot-pressed. Then, the adhesive layer 6 softens and adheres to the color developer layer 4. Thereafter, the base sheet 7 of the adhesive sheet 8 is peeled off, and the surface of the adhesive layer 6 and the image forming object 5 such as plain paper, cloth, or plastic film are combined and hot-pressed using a heating roller 51 as shown in FIG. Then, the adhesive layer 6 softens and adheres to the image forming object, and then the base sheet 12 of the colorant medium 1
is removed, and the developer image is transferred to the image forming body 5.

In addition, here, as a heating roller, 130℃ feeding speed 10+
am/s is used, but it is not necessary to use a heating roller as long as it can be heated, and a heat plate or the like may be used.

Image transfer formation is performed as described above.

Next, the composition of the photosensitive pressure sensitive medium and the manufacturing method will be briefly explained.

As shown in FIG. 3, the photosensitive pressure sensitive medium 10 has microcapsules 11 supported on a base sheet 12, and the microcapsules 11 mainly contain a photocurable resin, a photopolymerization initiator, and a dye precursor. do. Typical examples of photocurable resins include:
Ethylene glycol diacrylate, ethylene glycol dimethacrylate, trimethylolpropane triacrylate, diethylene glycol dimethacrylate, etc. are used as photopolymerization initiators - Alkoxyphenyl quinone, polycyclic quinone, benzophenone, substituted benzophenone, xanthone, thioxanthone, etc. Examples of dye precursors include those having structures such as lactones, lactams, and spiropyrans, such as triarylmethane compounds,
Examples include bisphenylmethane compounds, specifically crystal violet lactone, pendiylleucomethylene blue, etc. Photosensitive pressure sensitive medium] Capsule 11 of 0
can be produced by a well-known method such as a coacervation method or an interfacial polymerization method.
The dye precursor is 3 parts, the photopolymerization initiator is 2.5 to 4 parts, if necessary, the binder and plasticizer are each adjusted to 1 part or less, and the photosensitizer is adjusted to about 10% by weight of the polymerization initiator.

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

The base sheet 2 of the color developer medium 1 is made of a material having a relatively smooth surface and an appropriate release ability, and polyester film, polyethylene film, polypropylene film, etc. can be arbitrarily used.

0 The thickness of the base sheet 2 can be about 50 to 200 μm, preferably about 100 μm.

Furthermore, as the color developer for the color developer layer 4, any color developer used for conventional photosensitive and pressure sensitive media can be used. For example, acid clay, active viscosity, inorganic acid substances such as kaolin, P-
There are phenolic compounds such as phenylphenol, and aromatic carboxylic acid compounds such as salicylic acid, gallic acid, and propyltannic acid, which can be used alone or in combination. A binder can be mixed with this color developer in any proportion. Furthermore, the resin constituting the thermoplastic resin layer 3 includes:
Use a substance that softens or melts when heated and solidifies when cooled. 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 resin, and polyamide resin. , wax, etc.

In this example, the base sheet 2 of the color developer medium 1 was a 75 μm film of polyethylene terephthalate. For the thermoplastic resin layer 3, a mixture of styrene/acrylic resin and polyester was used.

In addition, the color developer layer 4 is made of acid clay, bisphenol ASP-
Phenylphenol was used.

Next, the coating method will be explained. As the thermoplastic resin layer 3,
A 50 wt% styrene-acrylic copolymer emulsion (1000 cps) and a 45 wt% polyester solution (500 cps) were mixed and applied to a 75 μm base sheet of polyethylene terephthalate after adjustment.
It was dried in an oven at 10°C for 1 minute. The film thickness after drying is 10 μm.

Next, as the color developer layer 4, 50 parts of acid clay, 30 parts of bisphenol A, and 30 parts of P-phenylphenol are dispersed in 60 parts of an aqueous solution of polyvinyl alcohol as a binder to form a color developer dispersion solution, and the thermoplastic resin after drying is prepared. Apply on layer 3. After coating, it was dried with hot air for 1 minute in an oven at 80° C. After drying, a 15 μm thick developer layer was obtained.

The base sheet 7 of the adhesive sheet 8 may be made of plastic film, paper, or the like as long as it does not deform due to heat sources such as heat rollers, but polyethylene terephthalate film is particularly preferred. As the adhesive layer 6, vinyl alcohol/vinyl acetate copolymer,
Vinyl resins such as polyvinyl chloride and vinyl chloride/vinyl acetate copolymers, acrylic resins such as polyethyl acrylate, polybutyl methacrylate, and methyl polycyanoacrylate, styrene resins, polyamide resins, wax, and the like can be used.

In this embodiment, the base sheet 7 of the adhesive sheet 8 is a polyethylene terephthalate film treated with silicone, and the adhesive layer 6 is a mixture of 10 parts wax, 10 parts ethylene-vinyl acetate copolymer, and 2 parts rosin ester. It was applied with a hot melt applicator.

It should be noted that the materials for realizing the method of the present invention are not limited to those in this embodiment, and can be selected from the materials shown in the text or other materials. However, it is desirable that the following conditions be met.

3 1. The adhesive force between the base sheet 7 of the adhesive sheet 8 and the adhesive layer 6 is the same as that between the base sheet 2 of the color developer medium 1, the thermoplastic resin layer 3, the color developer layer 4, and the adhesive layer 6 of the adhesive sheet 8. is smaller than any of the adhesive forces between the respective materials.

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

In this example, the adhesive layer 6 was adhered to the color developer body 1, but the image forming body 5 and the adhesive sheet 8 were heat-pressed in advance, the base sheet 7 was peeled off, and the adhesive layer 6 was supported. You can leave it there.

[Effects of the Invention] As is clear from the detailed description above, according to the present invention, when an image layer is peeled off from a conventional color developing medium, the color developer surface peeled off with a heat-adhesive sheet is Image 4: Frees you from the trouble of peeling off the support and base sheet when removing only the base sheet of the heat-sealable sheet after adhering it to paper, plastic film, etc., and allows you to easily, quickly and reliably attach it to plain paper. A developer image can be formed on the surface of an image-forming object such as.

Further, when transferring an image, it is possible to use the heat source at a low temperature, and furthermore, temperature control can be simplified and costs can be reduced. In addition, the image transfer material on which an image is formed by this method is resistant to external forces such as scratching and has a long service life in which the image does not easily peel off.

[Brief explanation of the drawing]

Figures 1 to 6 show examples embodying the present invention. Figure 1 is a perspective view of an image transfer product, and Figure 2 is a cross-section of a color developing medium used in the above example. 3 is an explanatory diagram of a method of forming a latent image on a photosensitive pressure-sensitive medium, FIG. 4 is an explanatory diagram of a method of forming a visible image on a color developing medium, and FIG. 5 is a perspective view of an adhesive sheet. FIG. 6 is an explanatory diagram of the process of transferring an image to an image-forming object. In the figure, 1 is a color developer medium, 2 is a base sheet, 3 is a thermoplastic resin layer, 4 is a color developer layer, 5 is an image forming body, and 6 is an adhesive layer. 5 gu) qfushi-)-1 384-

Claims (1)

[Claims] 1. An image is formed on a color developer medium having a color developer layer and a thermoplastic resin layer that react with at least a dye precursor to develop color on a base sheet, In an image transfer forming method in which the image forming surface of the medium and the image forming object are adhered and then only the base sheet of the color developer medium is peeled off, an adhesive layer is inserted between the image forming surface and the image forming surface. An image transfer forming method comprising the steps of: