JPH0376683A - Coupler medium - Google Patents

Abstract

PURPOSE:To simply, rapidly and certainly form a coupler image on the surface of an image receiving material such as plain paper by successively forming a thermoplastic resin layer and a coupler layer on a base sheet. CONSTITUTION:A coupler medium 1 has a base sheet 2, the thermoplastic resin layer provided to at least one surface of the base sheet 2 and the coupler layer 4 provided to the upper surface of said thermoplastic resin layer 3 and reacting with at least a dye precursor to form a color. That is, an image is formed on the coupler medium 1, for example, by imagewise exposing a sheet supporting photo-setting microcapsules including the dye precursor and superposing said sheet on the coupler medium 1 to press the same. Next, when the coupler medium is superposed on an image receiving material to be pressed thereto under heating, the thermoplastic resin layer is melted to bond the coupler layer and the image receiving layer. When the base sheet is released, the coupler layer 4 having the image formed thereto remains on the image receiving material. By this method, the coupler image is formed to plain paper or a plastic film simply, rapidly and certainly by one transfer process.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a color developer medium that makes it possible to form images on plain paper, fabric, plastic film, and the like.

[Prior art] Conventionally, microcapsules mainly contain a photocurable resin, a photopolymerization initiator, and a dye precursor, and a substance that develops color by reacting with the dye precursor contained in the microcapsules. A photosensitive pressure sensitive recording medium is known in which a photosensitive agent and a photosensitive agent are coated on the same surface. There is also a product in which the microcapsules and the color developer are coated on separate sheets (Japanese Patent Laid-Open No. 58-23
025, JP-A-58-88739, JP-A-58-88740, etc.).

In this type of recording medium, the photocurable material is cured by light and the microcapsules become rigid, so the surface is usually exposed to light according to the image information, and the microcapsules that have not been hardened by exposure are destroyed, so that the inside can be cured. A dye precursor is used in a device that forms an image by reacting with a color developer coated on the surface of a recording medium or on another sheet.

However, according to this photosensitive pressure sensitive recording medium, the specially processed photosensitive pressure sensitive sheet (photosensitive pressure sensitive recording medium) itself,
Alternatively, it is possible to record and form on a color developer sheet (developer medium) with only the color developer layer described above, but it is also possible to print an image of the same quality on any material such as postcards or other ordinary paper, cloth, PET film, etc. There was a problem that an image could not be recorded or formed. Therefore, the following methods have been proposed. First, a heat-fusible sheet consisting of a base sheet supporting a thermoplastic resin is prepared, and the thermoplastic resin-supporting surface and the color developer-supporting surface of the color developer sheet are overlapped and hot-pressed, so that the heat-fusible sheet side transfer only the visible image plane of the color developing medium.

Then, the heat-fusible sheet to 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.

[Problems to be Solved by the Invention] However, in the method using the heat-fusible sheet described above, the thermoplastic resin surface is bonded to the developer layer surface of the color developer sheet, and only the color developer layer of the color developer sheet is bonded. When peeling off the color developer sheet, the support of the color developer sheet and the color developer layer may not be separated, and the base sheet of the heat-fusible sheet and the thermoplastic resin may be peeled off.

The present invention was made in order to solve the above-mentioned problems, and its purpose is to remove the image layer from the conventional color developer sheet and to prevent the image layer from adhering to plain paper or plastic film. The object of the present invention is to reduce as much as possible the trouble of peeling off the image layer and the base sheet when only the base sheet of the heat-fusible sheet is removed after adhering the heat-fusible sheet, and to easily, quickly, and To provide a color developer medium that can reliably form a color developer image on plain paper, plastic film, etc. in a single transfer process.

[Means for Solving the Problems] In order to achieve this object, the color developer medium of the present invention has a structure in which a color developer layer is provided on the thermoplastic resin layer on the thermoplastic resin 3 on the base sheet. There is.

[Function] According to the present invention having the above configuration, an image is first formed on the color developer medium. As a method for forming this, a known method is used, such as a method in which a sheet carrying photocurable microcapsules containing a dye precursor is exposed to light according to an image, and the sheet is overlapped with the developer medium and pressurized. .

In this case, the image formed needs to be a mirror image of the desired image. Next, the above-mentioned color developer medium is overlapped with the object to be imaged and hot-pressed. Then, the thermoplastic resin layer melts, and the developer layer and the image-forming object are bonded together. Thereafter, when the base sheet is peeled off, the developer layer on which the image is formed remains on the image-forming body.

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

FIG. 1 is a sectional view of the color developer medium of this example.

The color developer medium 1 has a thermoplastic resin 3 on a base sheet 2 of polyethylene terephthalate film, and further has a color developer layer 4 on the thermoplastic resin 3.

First, a method for forming a color developer image on the surface 5 of an image forming object such as plain paper, plastic film, cloth, etc. will be explained with reference 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, first, with the back side of the original 20 and the sensitive surface of the photosensitive pressure-sensitive medium 10 overlapped, light from the light source 30 is applied to the original 20.
When the light is transmitted and irradiated, only the microcapsules lla of the photosensitive pressure sensitive medium 10 corresponding to the transparent portion 20a of the original 20 are exposed. In addition, reflected light from a document and modulated laser light scanned by a polygon mirror can also be used. As a result, the microcapsules 11 in the area irradiated with light
After a has hardened, it is then overlapped with the color developer medium and pressed using a pressure roller 40, as shown in FIG. Then, only the unhardened microcapsules 11b are destroyed, and the dye precursor inside flows out onto the color developer layer 4, and that part develops color, forming a reverse image identical to the image on the original 20.

Next, a method for forming a developer image on the surface of an image-forming object such as plain paper, cloth, or plastic film will be explained using FIG.

First, the developer layer surface 4 of the developer medium 1 on which an image has been formed is brought together with an image forming object 5 such as plain paper, cloth, or plastic film by the method shown in FIG. Then, the developer and binder in the developer layer 4 melt and adhere to the object to be imaged, and if the base sheet 2 of the developer medium 1 is then removed, the developer image is formed on the object 5 to be imaged. transcribe. In addition, here, as a heating roller, the feed rate is 130°C.
Although a heating speed of 0 mm/s is used, other heating conditions may be used, and a heat plate or the like may be used instead of a heating roller as long as it can be heated.

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

As shown in FIG.
Microcapsules 11 are supported thereon, and the microcapsules 11 mainly contain a photocurable resin, a photopolymerization initiator, and a dye precursor. Typical examples of photocurable resins include ethylene glycol diacrylate, ethylene glycol dimethacrylate, trimethylolpropane triacrylate, diethylene glycol dimethacrylate, etc.
Examples of photopolymerization initiators include α-alkoxyphenyl ketones, polycyclic quinones, benzophenones, substituted benzophenone xanthone, thioxanthone, etc., and dye precursors include those having structures such as lactones, lactams, and spiropyrans, such as triarylmethane compounds. , bisphenylmethane compounds, specifically crystal violet lactone, benzoylleucomethylene blue, etc. The capsules 11 of the photosensitive pressure-sensitive medium 10 can be manufactured by a well-known method such as a coacervation method or an interfacial polymerization method. 50 parts of dye precursor, 3 parts of dye precursor,
The photopolymerization initiator is adjusted to 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 of the example will be described.

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

The thickness of the base sheet 2 is 50 to 200 mm. It is preferably about 1006. Furthermore, as the color developer for the color developer layer 4, any developer used in conventional photosensitive pressure sensitive sheets can be used. Examples include inorganic acidic substances such as acid clay, activated clay, and kaolin, phenolic compounds such as P-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 is a substance that softens or melts when heated and solidifies when cooled. For example, vinyl alcohol/vinyl acetate copolymer, polyvinyl chloride/
Examples include vinyl resins such as vinyl chloride/vinyl acetate copolymers, acrylic resins such as ethyl acrylate, butyl acrylate, and methyl cyanoacrylate, styrene resins, polyamide resins, and waxes.

In this example, the base sheet 2 of the color developing medium 1 was a 75-pore film of polyethylene terephthalate.

For the thermoplastic resin layer 3, a mixture of styrene/acrylic resin and polyester was used. If you choose this resin,
As shown in FIG. 5, the thermoplastic resin layer 3 and the color developer layer 4 are cut at the edge of the image forming body 5. In other words, before disconnection, the following relationship holds true.

(2) The adhesive force between the base sheet 2 of the color developer medium 1 and the thermoplastic resin layer 3 is greater than the shearing force between the thermoplastic resin 3 and the color developer layer 4.

(2) The adhesive force between the thermoplastic resin layer 3 and the color developer layer 4 of the color developer medium 1 is greater than the shearing force between the thermoplastic resin layer 3 and the color developer layer 4.

Furthermore, after the disconnection, the following relationship holds true.

(2) The adhesive force between the color developer layer 4 of the color developer medium 1 and the image forming body is greater than the adhesive force between the base sheet 2 of the color developer medium 1 and the thermoplastic resin layer.

(2) The adhesive force between the thermoplastic resin layer 3 of the color developer medium 1 and the color developer layer 4 is greater than the adhesive force between the base sheet 2 of the color developer medium 1 and the thermoplastic resin layer.

Further, for the color developer layer 4, acid clay and bisphenol A1P-phenylphenol were used.

Next, the coating method will be explained. As the thermoplastic resin layer 3,
50wt% styrene acrylic copolymer emulsion (1
000 cps) and a 45 wt% polyester solution (500 cps) were mixed and adjusted, and then applied to a polyethylene terephthalate 75m film as base sheet 2, and dried in an oven at 110° C. for 1 minute. The film thickness after drying is 10 m. Next, as the color developer layer 4, 50 parts of acid clay, 30 parts of bisphenol A, 3 parts of P-phenylphenol
60 parts of an aqueous solution of polyvinyl alcohol as a binder
A color developer dispersion solution is prepared by dispersing the color developer into a color developer, and the developer is coated on the thermoplastic resin layer 3 after drying. After coating, it was dried with hot air in an oven at 80°C for 1 minute to obtain a 15-layer developer layer.

The developer medium of the present invention is thus created.

[Effects of the Invention] As is clear from the detailed description above, according to the present invention, the transfer step when forming a color developer image on plain paper, plastic film, etc. is reduced to one step, and the conventional color developer Image layer or base sheet when peeling off the image layer from a medium or when removing only the base sheet of the heat-fusible sheet after adhering the heat-fusible sheet with the image layer adhered to plain paper, plastic film, etc. It is possible to easily, quickly and reliably form a color developer image on the surface of an image forming object such as plain paper by minimizing the problem of peeling off.

[Brief explanation of drawings]

1 to 5 show embodiments embodying the present invention; FIG. 1 is a cross-sectional view of a developer medium, and FIG. 2 is a diagram showing a developer image formed on the surface of an image-forming object. Explanatory diagram of the method, 3rd
The figure is an explanatory diagram of a method of forming a latent image on a photosensitive pressure-sensitive medium.
Figure 5 is an explanatory diagram of the method of forming a visible image on a color developer medium.
The figure is a diagram showing the relationship between film properties and adhesive properties of thermoplastic resin. In the figure, 1 is a color developer medium, 2 is a base sheet (base sheet)
, 3 is a thermoplastic resin layer, and 4 is a color developer layer.

Claims (1)

[Claims] 1. A base sheet, a thermoplastic resin layer provided on at least one surface of the base sheet, and a thermoplastic resin layer provided on the upper layer of the thermoplastic resin layer that reacts with at least a dye precursor to develop color. A color developer medium characterized by having a color developer layer.