JPH02230248A - Photosensitive pressure-sensitive medium and image forming method by using this photosensitive pressure-sensitive medium - Google Patents

Abstract

PURPOSE:To obtain images on arbitrary substrate as well by carrying photosensitive microcapsules including a photosensitive material which is changed in mechanical strength by exposing a color developer and an adhesive which generates tackiness by a prescribed processing on one surface of a base material. CONSTITUTION:The photosensitive microcapsules 3 and the color developer 4 are deposited on the surface of the transparent base material 2 and the adhesive 5 is carried thereon. When the photosensitive pressure-sensitive medium 1 is exposed according to image information at this time, the microcapsules 3 are selectively hardened and softened and the latent images are formed thereon. The adhesive 5 is provided with the tackiness by the prescribed processing and the microcapsules 3 which are superposed on the base and are uncured or softened by being pressurized are broken, by which the included dye precursors 4 are subjected to color development by reaction with the color developer 4 and the sensible images are formed. The photosensitive pressure-sensitive medium 1 is simultaneously adhered to the base by the adhesive agent 5 and only the base material 2 is separated from the photosensitive pressure- sensitive medium 1. The layer formed with the sensible images remain on the substrate and the images are formed on the substrate on this way.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a photosensitive pressure-sensitive medium using a photosensitive substance and an image forming method using the photosensitive pressure-sensitive medium.

[Prior Art] Conventionally, as a photosensitive pressure sensitive medium, Japanese Patent Application Laid-Open No. 58-17432
No., JP-A-58-88739, JP-A-60-2574
No. 42, JP-A-61-23144, JP-A-61-24
No. 495, JP-A-61-42649, JP-A-61-1-
6 1 1 5 0, JP 61-126546,
JP-A-61-130945, JP-A-62-18537
As shown in JP-A No. 62-143044, photosensitive microcapsules mainly containing a photocurable resin, a polymerization initiator, and a dye precursor as photosensitive substances; A substance that reacts with the dye precursor contained in the microcapsules to develop color, a so-called color developer, is supported on a separate sheet, and a sheet on which the color developer is supported (
A configuration for obtaining an image on a color development sheet (hereinafter referred to as a color development sheet) is known. Also, JP-A No. 58-45090, JP-A No. 5-8-111
As shown in Japanese Patent Application No. 8740 and the like, a configuration is also known in which the microcapsules and the color developer are supported on the same surface to form an image on the photosensitive pressure sensitive recording medium itself.

[Problems to be Solved by the Invention] However, with the above configuration, it is not possible to obtain an image on anything other than the photosensitive and pressure sensitive medium itself or the developing sheet, which is one of them, and it is not possible to obtain an image on any support. It was not possible to form an image.

The present invention has been made to solve the above-mentioned problems, and provides a photosensitive pressure-sensitive medium that can form an image on any support, and an image forming method using the photosensitive pressure-sensitive medium. The purpose is to

[Means for Solving the Problems] In order to achieve the above object, the photosensitive pressure-sensitive medium of the present invention is a photosensitive pressure-sensitive medium mainly containing a photosensitive substance whose mechanical strength changes upon exposure to light on one surface of a base material. It is characterized in that it supports a chemical microcapsule, a color developer, and an adhesive that generates tackiness through a predetermined treatment.

Further, the image forming method of the present invention includes exposing the photosensitive pressure-sensitive medium according to the image, overlapping the photosensitive pressure-sensitive medium with an arbitrary support and applying pressure to destroy the photosensitive microcapsules having low mechanical strength. At the same time, the photosensitive pressure-sensitive medium is adhered to the support through an adhesive that has become sticky through a predetermined treatment, and the base material is separated from the photosensitive pressure-sensitive medium adhered to the support. That is.

[Function] In the present invention, the photosensitive pressure sensitive medium is exposed to light according to image information. Then, the microcapsules are selectively hardened or softened, and a latent image is formed. The photosensitive pressure sensitive medium on which this latent image has been formed is subjected to a predetermined treatment to impart tackiness to the adhesive, and is superimposed on a support and pressurized. This pressure treatment destroys the unhardened or softened microcapsules, and the encapsulated dye precursor reacts with the color developer to develop color and form a developed image. At the same time, the photosensitive pressure-sensitive medium is adhered to the support by the adhesive which has developed tackiness. Then, only the base material is separated from the photosensitive pressure-sensitive medium thus adhered.

Then, the layer on which the developed image is formed remains on the support, and an image is formed on the support.

[Example] An example of the present invention will be described below with reference to the drawings. FIG. 1 shows a cross-sectional structure of a photosensitive pressure-sensitive medium 1 according to the present invention, in which photosensitive microcapsules 3 and a color developer 4 are supported on the surface of a transparent base material 2, and an adhesive is applied as an upper layer. 5 is carried. As the base material 2, a plastic film (polyethylene terephthalate, polyvinyl chloride, polyvinylidene chloride, polyethylene, polypropylene, polymethyl methacrylate, polystyrene, etc.), a gelatin film, a cellulose film, etc. can be used.

The contents contained in the photosensitive microcapsules 3 include a dye precursor, a photosensitive substance such as a photocurable resin, and a polymerization initiator. Examples of the dye precursor include compounds having a lactone, lactam, sultone, spiropyran, ester or amide structure in their partial skeleton, such as triarylmethane compounds, bisphenylmethane compounds, xanthene compounds, fluoran compounds, thiazine compounds, Spiropyran compounds and similar compounds may be used alone or in combination. Examples of photocurable resins include ethylene glycols such as ethylene glycol dimethacrylate, triethylene glycol dimethacrylate, trimethylolbroban triacrylate (TMPTA), trimethylolbroban trimethacrylate, pentaerythritol triacrylate, and pentaerythritol trimethacrylate. and unsaturated acid esters. As the polymerization initiator, diaryl ketone derivatives such as penzophenone, mihela ketone, benzoyl methyl ether, isobrobyl xanthone, and isobrobyl thioxanthone, penzoyl alkyl ether, and ketocoumarin compounds are used.

Using known techniques such as coacervation and interfacial polymerization, urea-formaldehyde polymer, melamine-formaldehyde polymer, methylolmelamine-formaldehyde polymer, etc. are used as the capsule wall, and the above-mentioned dye precursor and photocuring are carried out inside. Photosensitive microcapsules 3 are manufactured in a form containing inclusions such as a polymeric resin and a polymerization initiator.

In addition, as the color developer 4, organic acids and esters such as tannic acid, gallic acid, and probyl gallic acid ester, phenol fordehyde resin, phenolacetylene condensation resin, acidic polymer, metal salts such as aromatic carboxylic acids, etc. As the adhesive 5, there may be used a heat-sensitive adhesive that becomes sticky when heated, or a pressure-sensitive adhesive that becomes sticky when pressed. As the heat-sensitive adhesive, thermoplastic resins such as olefin, vinyl, and acrylic resins can be used. When using a pressure-sensitive adhesive, a microcapsule solution of dextrin, polyvinyl alcohol, ethylene-vinyl acetate copolymer, etc. can be used, and as shown in FIG. 13. The microencapsulated pressure-sensitive adhesive 15 is applied to the surface to which the color developer 14 is applied.

In this example, 30 parts of the photosensitive microcapsules 3 described above, 10 parts of clay as a filler, and 10 parts of an ionomer as a binder were added to support the base material 2 of a colorless and transparent 25 μm polyethylene terephthalate film. A color developer dispersion solution in which particles of 30 parts of acid clay, 30 parts of zinc salicylate, and 30 parts of P-phenylphenol are dispersed in 600 parts of an aqueous solution of polyvinyl alcohol as a binder is applied to the upper surface of the color developer 4. and dried.

Then, as adhesive 5, 50 parts of an aqueous emulsion solution of 35 vt% acrylic-styrene copolymer was applied to the top surface.
50 parts of an aqueous emulsion solution of νt% ethylene-vinyl acetate copolymer was applied and dried to obtain a photosensitive pressure-sensitive medium 1.

FIG. 2 shows a schematic configuration of an image recording apparatus using an image forming method using the photosensitive pressure sensitive medium 1 of the present invention. In this apparatus, a roll paper-like photosensitive pressure-sensitive medium 1 carrying photosensitive microcapsules 3, a color developer 4, and an adhesive 5 as shown in FIG. has been done. The photosensitive pressure sensitive medium 1 is fed by a paper feed roller 103.
It is unwound and sent in the direction of arrow A in the figure. During the process, a light source 105 irradiates the surface of the document 104 as a means for performing a predetermined exposure process on the surface of the photosensitive pressure sensitive medium;
An optical lens 106 and a mirror 110 are arranged to form an image of the reflected light onto the surface of the photosensitive pressure sensitive medium. Further, a half-moon roller 107 is provided to take out plain paper 102 as an arbitrary support one by one, and the photosensitive pressure-sensitive medium 1 that has been exposed and the plain paper 1 fed by the feed roller 109 are provided.
A heating and pressing roller 108 is disposed as a means for superimposing 02 and heating and pressurizing development.

Furthermore, a separation roll 111 is arranged to separate the base material 2 of the photosensitive pressure-sensitive medium 1 .

Next, the overall operation of the image recording apparatus configured as described above will be explained.

The light emitted from the light source 105 and reflected by the original 104 is transmitted to the lens 106 . The photosensitive pressure sensitive medium 1 is exposed to light by the mirror 110 according to the image information of the original.

Next, plain paper is inserted through the half-moon roller 107, and as shown in FIG. 3, the plain paper is combined with the exposed photosensitive pressure-sensitive recording medium 1. In this state, pressure is applied by the heated pressure roller 108. Through this process, the photosensitive pressure sensitive recording medium 1
In this case, the unexposed photosensitive microcapsules 2 are destroyed and the dye precursor contained therein is extruded. The dye precursor and the color developer cause a color development reaction to form a color and are developed, and at the same time, the adhesive 5 is thermoplasticized and the photosensitive pressure sensitive recording medium 1 and the plain paper 102 are bonded together. Then, the base material 2 of the photosensitive and pressure sensitive recording medium 1 is separated by the separating roll 111, and the plain paper 102 is separated.
A layer with an image formed on top remains. In this example, the base material 2
Since a polyethylene terephthalate film is used for the photosensitive microcapsules 3 and an ionomer is used as a binder for the photosensitive microcapsules 3, they can be easily separated using a separation roll, separation tool, etc.

There are various other binders that can be easily separated, but the binder for the photosensitive microcapsules 3 must be selected depending on the material of the base material 2.

In this example, in order to improve the adhesion between the plain paper and the photosensitive pressure-sensitive medium 1, the entire adhesive surface is covered with adhesive, so when exposing from the adhesive surface, the amount of light reaching the microcapsules is small. Exposure takes time. Therefore, in the photosensitive pressure-sensitive medium of this example, a transparent support was selected, and photosensitive microcapsules were supported on the bottom layer thereof. For this reason, exposure is performed by irradiating light from the support side, thereby making it possible to perform exposure in a short time. Incidentally, when exposure is performed from the supporting surface side, a metal foil or the like can also be used as the support.

The photosensitive pressure-sensitive recording medium of the present invention is manufactured and used in the manner described above.

Further, in the above embodiment, a heat-sensitive adhesive was used as the adhesive 5, but if a pressure-sensitive adhesive is used, there is no need to use a heated pressure roller, and a pressure roller may be used.

In addition, in the above-mentioned example, the photosensitive microcapsules, the color developer, and the adhesive were supported in a layered manner, but the photosensitive microcapsules and the color developer may be supported in a mixture, or the photosensitive microcapsules, the color developer, and the adhesive were supported in a layered manner. Similar actions and effects can be obtained by carrying a mixture of a color developer and an adhesive.

[Effects of the Invention] As detailed above, by using the photosensitive pressure sensitive recording medium and image forming method of the present invention, an image can be recorded on any support.

[Brief explanation of the drawing]

1 to 4 show embodiments embodying the present invention. FIG. 1 is a diagram showing a cross-sectional structure of a photosensitive pressure-sensitive medium of this embodiment, and FIG. 2 is a diagram showing a cross-sectional structure of a photosensitive pressure-sensitive medium of this embodiment. A diagram showing a schematic configuration of an image recording device using an image forming method using a pressure-sensitive recording medium, FIG. 3 is a diagram showing the state of fixing by the image recording device of FIG. 2, and FIG. 4 shows a pressure-sensitive adhesive as an adhesive. FIG. 3 is a diagram showing a cross-sectional structure of a photosensitive pressure-sensitive medium in which a photosensitive pressure-sensitive medium is used. In the figure, 1 and 11 are photosensitive and pressure sensitive recording media, 2 and 12 are base materials,
3 and 13 are photosensitive microcapsules, 4 and 14 are color developers, and 5 and 15 are adhesives.

Claims (1)

[Scope of Claims] 1. One surface of the base material mainly contains a color developer, a photosensitive substance whose mechanical strength changes upon exposure to light, and a dye precursor that develops color by reacting with the color developer. 1. A photosensitive pressure-sensitive medium, characterized in that it supports photosensitive microcapsules and an adhesive that generates tackiness through a predetermined treatment. 2. The photosensitive pressure-sensitive medium according to claim 1, wherein the adhesive covers the photosensitive microcapsules and the color developer. 3. The photosensitive pressure-sensitive medium according to claim 1 or 2, wherein the base material is light-transmissive. 4. The photosensitive pressure-sensitive medium according to any one of claims 1 to 3 is exposed to light according to image information, and the photosensitive pressure-sensitive medium is overlapped with an arbitrary support and pressurized to obtain photosensitivity with low mechanical strength. Destroying the microcapsules and adhering the photosensitive pressure-sensitive medium to the support via an adhesive that has become sticky due to the predetermined treatment, and separating the substrate from the photosensitive pressure-sensitive medium adhered to the support. An image forming method characterized by: 5. The image forming method according to claim 4, wherein the photosensitive pressure sensitive medium according to claim 3 is exposed by irradiating light from the substrate side.