JPH02287455A - Image forming method - Google Patents

Abstract

PURPOSE:To easily, rapidly and surely form developer images with one time of transfer stage on plain paper by superposing the image plane of a color developer medium on which the images are formed and a body to be formed with images, thermally pressing the same, then stripping only the base sheet of the color developer medium. CONSTITUTION:The images are formed on the color developer medium 1. For example, a method for exposing the sheet deposited with photosetting microcapsules contg. dye precursors according to the images and superposing this sheet on the color developer medium 1 and pressurizing both and other methods are used as the method for forming the images. The images to be formed are required to be the reflected image of desired images. A thermoplastic resin layer 3 melts and a color developer layer 4 and the body 5 to be formed with images are adhered when the color developer medium 1 is superposed on the body 5 to be formed with images and is thermally pressed thereto. The color developer layer 4 formed with the images remains on the body 5 to be formed with images when the base sheet 2 is stripped. The laboriousness of the stripping and the peeling of the images are relieved in this way and the color developer images are easily, rapidly and surely formed on the surface of the body to be formed with images, such as plain paper.

Description

Detailed Description of the Invention [Industrial Application Field 1] The present invention relates to forming an image on an image-forming object using a color developer medium having at least a color developer layer and a thermoplastic resin layer on a base sheet. The present invention relates to an image forming method.

[Prior Art 1 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 (hereinafter referred to as a visible dye precursor) has been used. A photosensitive and pressure sensitive recording medium is known in which a colorant (colorant) is 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 Application Laid-open No. 58
-23025, JP-A-58-88739, JP-A-5
8-88740, etc.).

In this type of recording medium, the photocurable substance 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 and the internal parts are It is used in a device in which a dye precursor is reacted with a developer coated on the surface of a recording medium or on another sheet to form an image.

However, according to this photosensitive and pressure sensitive recording medium, it is possible to form records on the specially processed photosensitive and pressure sensitive sheet itself, or on the aforementioned color developer sheet with only a color developer layer, but it is possible to form records on the color developer sheet with the same quality. Images can be printed on regular paper such as postcards, cloth, PE
There was a problem in that recording could not be formed on any material such as T 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.

[Problem to be Solved by the Invention 1] However, it is possible to use the above-mentioned heat-fusible sheet to adhere the thermoplastic resin surface to the developer layer surface of the color developer medium, and then peel off only the color developer layer of the color developer medium. In this method, separation between the support of the color developing medium and the color developer layer, which should be separated, sometimes occurs between the base sheet of the heat-fusible sheet and the thermoplastic resin.

Furthermore, after peeling off the developer and transferring it to a heat-fusible sheet, the peeled developer side is adhered to plain paper, plastic film, cloth, etc. using a heat-fusible sheet, and heat-sealed. Even when the base sheet of the color developer 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.

The present invention has been made to solve the above-mentioned problems, and its purpose is to remove the image layer from conventional color developing media and to remove the thermoplastic resin surface of the heat-fusible sheet from plain paper or paper. The purpose is to eliminate the hassle of peeling off the image layer or base sheet when only the base sheet of a heat-fusible sheet is removed after adhering to a plastic film, and the peeling of the image at that time, and is simple, quick, and reliable. Another object of the present invention is to provide an image forming method capable of forming a color developer image on plain paper, plastic film, etc. in a single transfer step.

1. Means for Solving the Problems] To achieve this object, the image forming method of the present invention includes at least a color developer layer that reacts with a dye precursor to develop color and a thermoplastic oil layer on a base sheet. An image is formed on a color developer medium having a color developer medium, and the image surface of the color developer medium on which the image is formed and the image-forming object are superimposed and hot pressed, and then only the base sheet of the color developer medium is removed. The gist is to peel it off.

[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 1] 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. II colorant medium 1 includes a thermoplastic resin 3 on a base sheet 2 and a color developer N4 on the thermoplastic resin 3.
has.

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. 1 to 4.

FIG. 3 is an explanatory diagram of a method of forming a latent image on the photosensitive pressure-sensitive medium 10.1 As shown in the figure, first, light from a light source 30 is applied to the document 2.
When irradiated through 0, the transparent part 20a of the original 1'1%20
Microcapsules lla of photosensitive pressure sensitive medium 10 corresponding to
Only the microcapsules lla are exposed to light, thereby hardening the microcapsules lla in that area.

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 the pressure roller 40, only the uncured microcapsules 11b are destroyed, and the dye inside is The precursor flows onto the developer 4. Then, that part develops color and forms a mirror image of the original 8F20.

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

First, the developer layer surface of the developer medium 1 on which an image has been formed by the above method and the image forming object 5 such as plain paper, cloth, or plastic film are brought together and heated and pressed with a heating roller 6. Then, the color is developed. The developer and binder in the agent layer 4 are melted and adhered to the object to be imaged, and then the base sheet 2 of the developer medium 1 is removed and the developer image is transferred to the object 5 to be imaged. In addition, here, as a heating roller, the feeding speed is 10filI at 130℃.
Although an I/S material is used, 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.

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 noacrylate, ethylene glycol noacrylate, trimethylolpropane triacrylate, noethylene glycol no methacrylate, etc. are used as photopolymerization initiators such as α-flucoxyphenyl ketone,
Polycyclic quinone, benzophenone, substituted benzene,
Xanthone, thioxanthone, etc., and dye precursors having structures such as lactone, lactam, spiropyran, etc., such as triarylmethane compounds, bisphenylmethane compounds, specifically crystal violet lactone, benzoylleucomethylene blue, etc. can give. The capsules 11 of the photosensitive pressure sensitive medium 10 can be manufactured by a well-known method such as a coacelvage tan method or an interfacial polymerization method.
The proportions of the liquid materials are 50 parts of photocurable resin, 3 parts of dye precursor, 2.5 to 4 parts of photocurable initiator, if necessary, up to 1 part each of binder and plasticizer, and photoresist. 10 of the sensitizers and polymerization initiators! Adjust the amount of lX to about 1%.

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 suitable material having a relatively smooth surface and good mold releasability, and polyester film, polyethylene film, polypropylene film, etc. can be arbitrarily used.

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, WIFa-free substances such as kaolin,
Examples include 7-ol 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 uses a substance that softens or melts when heated and solidifies when cooled. For example, vinyl alcohol, vinyl acetate copolymer, polyvinyl chloride, vinyl chloride, vinyl acetate, etc. Examples include vinyl resins such as electrolyte, acrylic resins such as ethyl acrylate, butyl acrylate, sia/methyl acrylate, styrene resin, polyamide resin, and wax.

In this example, the base sheet 2 of the color developing 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 other words, the following relationship holds true.

1. The adhesive strength between the color developer layer 4 of the color developer medium 1 and the image forming body is the same as that of the base sheet 2 and the thermoplastic resin layer 3 of the color developer medium 1.
greater than the adhesive force of

2. The adhesive force between the thermoplastic resin N3 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 /13.

In addition, the color developer M4 is acid clay, bis7el7-A, P-
Phenyl 7 enol was used.

Next, the coating method will be explained. Thermoplastic 1m/? ! 3, 50 wt% styrene acrylic copolymer emulsin (1000 cps) and 45 wt% polyester solution (500 cps) were mixed, adjusted, and applied to a base sheet of polyethylene terephthalate 75 μ-.
It was dried at ℃ open for 1 minute. Film thickness after drying is 10μ
50 parts of acidic clay, 30 parts of bisphenol A, and 30 parts of P-7 engineering 7-ru are dispersed in 60 parts of an aqueous solution of polyvinylfurcol, which is a binder, as a color developer N4. Thermoplasticity after drying as a dispersion solution *1m
Apply on layer 3. After coating, it was dried with hot air at 80° C. for 1 time in the open, and after drying, a 15 μm thick developer layer was obtained.

[Effects of the Invention 1] 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 transfer process is reduced to one step compared to the conventional color developer medium. Peeling off the image layer or base sheet when removing only the base sheet of the heat sealing sheet after adhering the thermoplastic resin surface of the heat sealing sheet to IF 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 without having to worry about storing the image or peeling off the image.

[Brief explanation of the drawing]

1 to 4 show an embodiment embodying the present invention, and FIG. 1 is an explanatory diagram of a method of forming a color developer image on the surface of an image-forming object according to the present embodiment. The figure is a cross-sectional view of the color developer medium used in the above example, FIG. FIG. 3 is an explanatory diagram of a method of forming a visual image. 1... Color developer medium, 2... Base sheet, 3...
Thermoplastic resin, 4... Color developer layer, 5... Image forming body.

Claims (1)

[Claims] 1. Forming an image on a color developer medium having on a base sheet at least a color developer layer that reacts with a dye precursor to develop color, and a thermoplastic resin layer, and forming an image on the image forming surface of the color developer medium. 1. An image forming method, which comprises superimposing and hot pressing an object to be imaged, and then peeling off only the base sheet of the color developer medium.