JPH05221117A - Recording apparatus - Google Patents

Abstract

PURPOSE:To obtain a good transfer image on recording paper by solving such a problem that the bonding amount of ink to a latent image dot is insufficient and the bonding independence of the ink to the latent image dot is damaged in a recording layer using a recording body having a surface whose sweepback contact angle lowers at the time of the contact with a liquid in a heated state. CONSTITUTION:A developing means is constituted of a primary developing part 4 performing development using a liquid containing a resin having ink compatibility to make a latent image part compatible with ink and a secondary developing part 5 performing development using ink. The resin-containing liquid supplied to the primary developing part 4 is bonded to the latent image part to be evaporated and dried before it reaches the secondary developing part 5 to form a resin layer having ink compatibility on the latent image part. Ink is supplied to the secondary developing part 5 to be bonded to the latent image part but, since the resin layer formed on the latent image part has ink compatibility, the adhesiveness of ink is enhanced as compared with a conventional one.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel recording device,
More specifically, the surface of the recording medium having a specific property is selectively and reversibly formed so that a region having a receding contact angle corresponding to the heating temperature is formed, and a coloring material is applied to this region (latent image). The present invention relates to an apparatus useful for a recording system in which a recording agent (used in the form of a solution or a dispersion liquid) contained therein is supplied to make the image visible, and the image is transferred in good condition to plain paper or the like.

[0002]

2. Description of the Related Art An offset printing method using a lithographic printing plate is a typical means for dividing a surface into a liquid adhesive area and a non-liquid adhesive area for use in image formation. However, in this offset printing method, it is inevitable that the apparatus becomes large in size by incorporating the plate making process from the original plate and the printing process from the printing plate (printing plate) into one device. For example, even in a relatively small office offset plate making printing machine, in many cases, the plate making apparatus and the printing apparatus are separate.

In order to eliminate such a defect of the offset printing method, a liquid adhesive area and a non-liquid adhesive area can be formed according to image information, and can be repeatedly used (reversible Recording methods and devices have been proposed. Some of them are as follows. (1) Aqueous development method After applying a charge to the hydrophobic photoconductor layer from the outside, it is exposed to form a pattern having a hydrophobic portion and a hydrophilic portion on the surface of the photoconductor layer, and only the hydrophilic portion is formed. Aqueous developer is attached and transferred to paper (Japanese Patent Publication No. 40-18992, Japanese Patent Publication No. 40-18993)
(Japanese Patent Publication No. 44-9512, JP-A No. 63-264392, etc.). (2) Method utilizing photochemical reaction of photochromic material The layer containing materials such as spiropyran and azo dye is irradiated with ultraviolet rays, and these photochromic compounds are hydrophilized by photochemical reaction [for example, "Polymer Papers", No. 37 Volume 4
No., 287 (1980)]. (3) Method utilizing the action of internal biasing force The amorphous state and the crystalline state are formed by physical change,
Forming areas where liquid ink is attached / not attached (Japanese Patent Publication No. 54-41)
No. 902).

According to the method (1), after the water-based ink is transferred onto paper or the like, the hydrophilic portion is erased by the charge removal, and another image information can be recorded. That is, one original plate (photoconductor) can be repeatedly used. However, since this method is based on the electrophotographic process, charging → exposure →
It requires a long process of development → transfer → static elimination, and has the drawbacks that it is difficult to downsize the device, reduce cost, and make maintenance free. According to the method (2), the hydrophilicity and the hydrophobicity can be freely and reversibly controlled by selectively changing the irradiation of ultraviolet rays and visible light, but the reaction time is very long because of poor quantum efficiency. However, the recording speed is slow and the stability is lacking, and it is the fact that it has not reached the practical level yet. Furthermore, according to the method of (3), the information recording member used there is stable after recording, but before recording, there is a possibility that the physical structure changes due to temperature change. Therefore, there is a problem with storability. In addition to this, since a means for applying a heat pulse and then quenching is adopted for erasing the recorded information pattern,
Repeated image formation has a disadvantage that the complexity cannot be imitated.

The inventors of the present invention have conducted research and studies to solve the conventional drawbacks and inconveniences. As a result, a specific recording medium (a recording medium having a surface whose receding contact angle decreases when it is heated and brought into contact with a liquid, for convenience, is simply referred to as “recording medium” or “recording medium (A)”) and Contact material
(Liquid, vapor or solid that becomes liquid or generates liquid or vapor at the temperature below the receding contact angle reduction start temperature referred to in recording medium (A)), and the surface of recording medium (A) as contact material (B) By heating selectively in the state of contact (this heating may be from the front side or the back side of the recording medium (A)) or while the surface of the recording medium (A) is being selectively heated. After contact with the contact material (B), a latent image showing a receding contact angle according to the heating temperature is formed on the surface of the recording material (A), and the latent image is visualized with a recording agent containing a coloring material. Then, a method of transferring this visible image to recording paper and an apparatus related thereto were proposed (West German Patent Publication No. 4010275). According to the method proposed here, it is extremely easy to form a latent image and a visible image on a recording medium, transfer the visible image to plain paper or the like (transfer target), and erase the latent image. Since it can be reversibly performed, a large number of copies can be easily performed, and different copy images can be continuously obtained.

[0006]

The outline of the proposed device and the like is as shown in FIG. Here, the recording body 21
The thermal head 22 serves as a heating means (heating source) for the surface.
Is used to perform latent image formation and development at the same time. In the figure, 23-1 is ink (also serves as a contact material and a recording material), 2
3-2 is a plate for containing the ink 23-1, 24 is a transfer roller, 25 is recording paper, 26 is a cleaner, and 27 is an image removing lamp. In this apparatus, recording is performed according to a digital image signal, and at that time, a latent image is formed in a dot shape as shown by 28 in FIG. And ink 23 during development
-1 adheres to the latent image portion while peeling off on the recording body 1. Here, if the latent image is formed in an analog character shape as indicated by 29 in FIG. 11, the movement of the ink is blocked at the end of the character when the ink is peeled off, and an abnormal amount is formed in the latent image part. Adhere to. In the figure, E is extra ink adhesion. However, when the latent image is composed of dots, the ink 23-1 can be routed between the dots as shown in FIG. 12, so that abnormal adhesion does not occur in the latent image portion. However, when the latent image is composed of dots, the image will be blurred if the dots are not connected on the recording paper 25. Therefore, the ink 23 attached to the latent image dot on the recording body 21
The amount of 1 is required to be sufficient for the dots to be connected to each other on the recording paper 25 during transfer. However, in the apparatus of FIG. 9, since the latent image portion is not completely ink-philic and is adhered by utilizing the fact that the ink 23-1 is tacked to the recording body 21, sufficient ink is applied to the latent image portion. It is not easy to extract the conditions for depositing ink, and the amount of ink deposited on the latent image dots tends to be insufficient.

On the other hand, in FIG. 12, when the latent image dot interval is narrowed, dots are easily connected to each other during transfer,
When the latent image dot interval is narrowed, the following problems occur. That is, FIG. 13A shows the state of heating for forming a latent image, but it is difficult to perform this heating with the latent image shape as it is, and in reality, as shown by the arrow in the figure, heat is inevitable. Spreads over. In the figure, 30 is a heating element. Therefore, if the distance between the latent images is shortened, the latent images are also heated, and the shape becomes as shown by A ′ in FIG. A is the target latent image shape. For this reason, the portion between the target latent images slightly wets the ink 23-1, and the ink 23-1 between the latent images becomes unusable and cannot pass through in some cases. As shown in FIG. Abnormal ink adhesion occurs on the dots, and the independence of ink adhesion on the latent image dots during development is impaired.

The object of the present invention is to solve the above-mentioned two problems, that is, the shortage of the amount of ink adhered to the latent image dots and the deterioration of the independence of the ink adherence of the latent image dots, and to obtain a good transferred image. The present invention provides a recording device that can be obtained on recording paper.

[0009]

The recording apparatus of the present invention is provided by selectively heating the surface of the following recording material (A) in contact with the following contact material (B) or by recording material (A) Recording the contact material (B) that forms a latent image showing a receding contact angle according to the heating temperature on the surface of the recording material (A) by contacting the surface of the recording material with the contact material (B) in a selectively heated state. A means for supplying the surface of the body (A), a means for selectively heating the surface of the recording body (A) to form a latent image, a developing means for making the latent image visible, and a recording body ( A) In a recording apparatus provided with a means for transferring the recording material adhered onto the recording paper, the developing means supplies a liquid containing a resin that shows wetting to the recording material to the latent image portion. It comprises a first developing section for forming a layer and a second developing section for supplying a recording agent to form a latent image after the resin layer is formed. Recording apparatus characterized Rukoto. (A) A recording body provided with a surface layer having a property of reducing a receding contact angle when heated and brought into contact with a liquid. (B) A liquid, a vapor, or a solid that becomes a liquid or generates a liquid or a vapor at a temperature at which the receding contact angle of the recording medium (A) starts to decrease. Is characterized by.

In such an apparatus of the present invention, if a liquid containing a resin that wets the recording material is used as the contact material (B), the contact material (B) supplying means and the first developing section of the developing means are used. And can be one. In the apparatus of the present invention, the latent image can be erased by heating the surface of the recording medium (A) on which the latent image is formed in the absence of the contact material (B), and reversible image formation is possible. It can be done.

The present invention will be described in more detail below. When the recording medium (A) used in the apparatus of the present invention is heated in contact with a liquid, its receding contact angle becomes low even after cooling, and the receding contact angle becomes high due to heating in the absence of liquid. A member having a function, at least the surface of which is formed. The surface of the recording material (A) having such a function is (1) a member containing an organic compound having a surface self-alignment function of a hydrophobic group, or (2) an organic compound having a hydrophobic group and having a hydrophobic group. Is a member whose surface is oriented.

The "surface self-orientation function" referred to in (1) means that when a solid formed by depositing a compound on a support or a solid formed by the compound itself is heated in air, the hydrophobic group on the surface moves toward the air (free). It means that it has a property of being oriented toward the surface side). This also applies to (2). Generally, in an organic compound, the hydrophobic group has a property of being easily oriented toward the hydrophobic atmosphere. This is a phenomenon that occurs because the interfacial energy at the solid-gas interface tends to decrease. Further, this phenomenon tends to occur as the molecular length of the hydrophobic group becomes longer, but this is because the mobility of the molecule upon heating increases as the molecular length becomes longer.

More specifically, it has a hydrophobic group at the end.
If it is a molecule (that is, lowering the surface energy), it will be on the air side.
It is easy to orient to the surface (free surface side). Similarly, (-CH ₂
-) The linear molecule containing n (-CH ₂ CH ₂ - has a partial planar structures), each other molecular chain is easily oriented. Further, in the molecule containing (-Ph-) n, the -Ph- portion has a planar structure, and the molecular chains are easily oriented. Note that −Ph−
Is a p-phenylene group (hereinafter the same). Particularly, a linear molecule containing an element having a high electronegativity such as fluorine has a high self-aggregating property, and the molecular chains are easily oriented.

Summarizing the results of these investigations, it is more preferable that a straight-chain molecule having a molecule having a high self-aggregating property or a molecule having a planar structure and having a hydrophobic group at the terminal, or such a straight chain molecule is used. It can be said that the compound containing a chain molecule has a high surface self-orientation function.

As is clear from the above description, there is a relation between the surface self-orientation state and the receding contact angle, and also between the receding contact angle and the liquid adhesion. That is, the adhesion of the liquid on the solid surface occurs mainly by the tacking of the liquid on the solid surface. This tacking can be regarded as a kind of frictional force when a liquid slides on a solid surface. Therefore, the "receding contact angle" θr in the present invention includes cos θr = γ (γs-γse-πe + γf) / γev (where γ: surface tension of solid in vacuum γse: solid-liquid interfacial tension γev liquid Surface tension when is in contact with its saturated vapor πe: Equilibrium surface tension γf: Friction tension γs: Surface tension of a solid without an adsorbed layer) (Saito, Kitazaki et al. Vol. 22, No. 12, 1986). Therefore, when the value of θr decreases, the γf value increases. That is, the liquid does not easily slide on the solid surface, and as a result, the liquid adheres to the solid surface.

As can be inferred from these mutual relationships,
The liquid adhesion depends on the degree of the receding contact angle θr, and the receding contact angle θr is determined by how the member having the surface self-orienting function on the surface. Therefore, in the apparatus of the present invention, the recording material (A) is necessarily a member having a surface self-aligning function on the surface because of the necessity of forming a desired pattern area on the surface and / or visualizing with a recording agent. Must be selected.

Although the relationship between the receding contact angle and the liquid adhesion property has been described so far, these matters are described in detail in the above-mentioned West German Patent Publication No. 4010275.

The liquid of the contact material (B) is as described above, but the contact material (B) is, to put it simply, a liquid or a vapor from the beginning, or the recording material (A). It is a solid that eventually produces a liquid at a temperature below the temperature at which the receding contact angle θr decreases. The vapor here is the recording medium (A)
It is sufficient that at least a part of the surface of the recording medium (A) is condensed to form a liquid, and the liquid can wet the surface of the recording medium (A). On the other hand, the solid here is a liquid, a liquid is generated, or a vapor is generated at a temperature at which the receding contact angle θr is reduced or lower. The vapor generated from the solid is condensed on the surface of the recording medium (A) or in the vicinity thereof to generate a liquid, as in the case described above.

More specifically, these contact materials (B) are as follows.

That is, as the liquid which is one of the contact materials (B), in addition to water, an aqueous solution containing an electrolyte, ethanol, n-
Alcohols such as butanol, polyhydric alcohols such as glycerin and ethylene glycol, polar liquids such as ketones such as methyl ethyl ketone, straight chain hydrocarbons such as n-nonane and n-octane, and cyclic hydrocarbons such as cyclohexane. , Non-polar liquids such as m-xylene and aromatic hydrocarbons such as benzene. Also, a mixture of these may be used, and various dispersions and liquid inks can also be used. More desirably, polar liquids are superior. Contact material
In addition to water vapor, other vapors of (B) can be used as long as they are liquid vapors of the contact material (B), but especially vapors of organic compounds such as ethanol vapor and m-xylene vapor.
(Including those in a sprayed state). The temperature of this organic compound vapor needs to be lower than the melting point or softening point of the compound forming the surface of the recording material (A). As another solid of the contact material (B), higher fatty acid, low molecular weight polyethylene, polymer gel (polyacrylamide gel,
Examples thereof include polyvinyl alcohol gel), silica gel, and a compound containing water of crystallization.

As a means for supplying the contact material (B), for example, a plate is provided below the recording medium (A) so that the liquid is filled and the recording medium (A) is always in contact with the liquid in the dish, and the heating source is near the plate. Alternatively, the simplest configuration is to place it in a dish. Instead of the dish, a sponge-like porous body containing a liquid may be used.

As the heating means for forming a latent image in the present invention, in addition to contact heating by a heater, a thermal head, etc., an electromagnetic wave (a light beam from a source such as a laser light source or an infrared lamp is condensed by a lens) is used. There is non-contact heating.

When the transfer of one image information is completed, the surface of the recording material (A) is heated in the absence of liquid or vapor (in air, in vacuum or in an inert gas) (heating temperature: 50-). Thirty
0 ° C, preferably 100 to 180 ° C, heating time: 1 msec to
If the latent image is erased for 10 seconds, preferably 10 milliseconds to 1 second, the recording medium (A) can be used repeatedly.

As a heating source for erasing the latent image, a contact heating source such as a heater or a thermal head or a non-contact heating source using electromagnetic waves such as a laser or an infrared lamp is desirable. The heating may be performed only on the latent image portion, but may be performed on the entire surface of the recording material (A). Rather, it is more preferable to heat the entire surface because the device structure can be simplified.

The latent image erasing means is provided at a position where the surface of the recording medium (A) is substantially cooled during the time until the latent image is formed again after heating for erasing. The heating temperature required to erase the latent image is as described above. A temperature below the point is desirable.

As the recording paper (transferred material), a transparent or opaque resin film, plain paper, synthetic paper, ink jet recording paper, type paper or the like can be used.

After the latent image is formed by the latent image forming means, the latent image is visualized by the developing means. In the apparatus of the present invention, the developing means is made of a resin which is wet with the recording agent. A first developing unit (1 may be referred to as "primary development" hereinafter) that supplies a contained liquid (hereinafter also referred to as "resin-containing liquid") to form a resin layer on the latent image portion.
Second developing section) and a second developing section (secondary developing section) to form a latent image by supplying a recording material after forming a resin layer in the primary developing (secondary developing section) Development part)
It consists of and. The resin-containing liquid adhered to the latent image dots by the primary development is dried by the secondary development so that a resin layer is formed on the latent image portion. If the resin contained in the resin-containing liquid is appropriately selected, the hydrophilicity of the recording material on the surface of the formed resin layer (hereinafter also referred to as “ink-philicity”) becomes extremely good (the contact angle by the recording material is Therefore, the adhesion of the recording agent is improved as compared with the conventional latent image (the contact angle of the recording agent is 50 ° to 20 °). The thickness of the resin layer formed above is preferably 0.1 to 100 μm, more preferably 1 to 10 μm. In the apparatus of the present invention, latent image formation and primary development may be performed integrally. In this case, the primary developing liquid also serves as the contact material (B).

Next, the resin-containing liquid used for the primary development will be specifically described. The component of this resin-containing liquid is a resin and a resin dispersion solvent. The resin preferably exhibits wettability with respect to the recording agent (contact angle due to the recording agent is 0 °), and the dispersion solvent is selected according to the type of the resin. Examples of such resins include acrylic emulsions, vinyl acetate emulsions, vinyl acetate-ethylene emulsions, water dispersion type polyurethanes, aqueous polyurethanes, polyvinyl alcohols, polyvinyl butyral, polyethylene oxides, dimples, and celluloses. Examples of the dispersion solvent include water, polyhydric alcohol, n-alkane and the like. The resin is in a weight ratio of 1:99 with respect to the dispersion solvent.
It is desirable that the dispersion is ˜1: 2, preferably 1: 9 to 3: 7. The resin may be colloidal, emulsified, dispersed or dissolved in the solvent in the dispersion solvent.
The resin in the colloidal state, the emulsified state, or the dispersed state has an advantage that a thick resin layer can be formed without increasing the viscosity of the liquid rather than dissolving the resin in the latent image portion after the subsequent development. For example, when the recording agent is aqueous, water is used as a dispersion solvent, and an emulsified ethylene-vinyl acetate copolymer is mixed with polyvinyl alcohol or polyvinyl butyral as a resin.

As the recording agent, one suitable for the apparatus of the present invention is selected from among the recording agents used in the conventional print recording method such as writing ink, ink jet recording ink, printing ink, and electrophotographic toner. Can be used. As a more specific and preferable example, for example, as the water-based ink, water-based ink containing water, a wetting agent, a dye as a main component or water, a pigment, a polymer compound for dispersion, and a water-based pigment dispersion containing a wetting agent as a main component are dispersed. An emulsion ink in which ink, pigment or dye is dispersed in water using a surfactant is used.

In the apparatus of the present invention, a heating means may be provided between the primary developing section and the secondary developing section in order to accelerate the evaporation of the liquid after the primary development. By doing so, the range of selection of the primary developing liquid can be increased. In this case, an infrared lamp, a ceramic heater or the like can be used as the heating means.

Next, the present invention will be described in more detail based on some structural examples. FIG. 1 is a schematic view showing a recording apparatus of one configuration example according to the present invention, in which 1 is a recording body having a surface which has a property of decreasing a receding contact angle when it is heated and brought into contact with a liquid, and 2 is a latent image. Heating means for forming (a thermal head is used in this example), 3-1 is a liquid as a contact material, 3-2
Is a plate for containing the liquid 3-1; 4 is a primary developing section; 5 is a secondary developing section; 6 is a transfer roller; 7 is recording paper; 8 is a cleaner for removing the residual recording agent on the surface of the recording medium. , 9 are heating means for erasing the latent image (in this example, an infrared lamp is used). The feature of this recording apparatus is that the developing means for developing after the latent image is formed is a primary developing portion 4 for making the latent image portion ink-philic by developing with a liquid containing an ink-philic resin.
It is configured by the secondary developing unit 5 that develops with ink.

The operation of the recording apparatus of FIG. 1 will be described with reference to FIG. 2. First, the heating means (thermal head) 2 according to an image signal in a state where the surface of the recording body 1 is in contact with the liquid 3-1. The latent image portion S is formed by selectively heating with. Next, for example, 1 composed of a sponge roller or the like
The liquid L containing the ink-philic resin is supplied to the surface of the recording body 1 by the next developing unit 4. The liquid L ′ attached to the latent image portion S by the primary development evaporates and dries by the time it reaches the secondary developing portion 5, and an ink-philic resin layer R is formed on the latent image portion S. After that, ink is supplied in the secondary developing unit 5, but the surface of the resin layer R is very easily wetted by the ink, so that the adhesion of the ink becomes very good as compared with the conventional latent image. After the secondary development, the recorded image is transferred onto the recording paper 7 by the transfer roller 6. Thereafter, the residual ink or the like on the surface of the recording body 1 is removed by the cleaner 8, and then the latent image is erased by the heating means (infrared lamp) 9 for erasing the latent image, and the next recording cycle is started.

Another configuration example of the recording apparatus according to the present invention is shown in FIG.
And shown in FIG. In these constitutional examples, latent image formation and primary development are integrated. In the example shown in FIG. 3, a thermal head which comes into contact with the recording body 1 is used as the heating means 2 for latent image formation in the same manner as described above. An infrared lamp is used as the heating means 9 for erasing the latent image. In the example of FIG. 4, a laser which is not in contact with the recording body 1 is used as the heating means for forming the latent image, and the heating means for erasing the latent image is used. A ceramic heater 9 is used. Further, both use the primary developer as a contact liquid. With such a configuration, the same effect as that of the apparatus of FIG. 1 can be obtained, and the recording time can be shortened and the apparatus can be downsized.

FIG. 5 shows still another configuration example according to the present invention. In this configuration example, a roller 10 containing a liquid is used instead of the dish 3-2 containing the liquid 3-1 in the configuration of FIG. 3, and a heating means 11 is provided between the primary developing section 4 and the secondary developing section 5. Is provided. The heating means 11 further improves the independence of ink adhesion between latent image dots. That is, when the surface of the recording body 1 is heated by the heating means 11 after the primary development, the resin layer R is formed on the latent image portion S as shown in FIG. Although not changed by heating, the ink repellency is increased by heating between latent images. Therefore, even if the latent images are slightly wetted during the latent image formation as shown in FIG. 14, the ink repellency is increased by the heating by the heating means 11, and the ink is regenerated as shown in FIG. 6 at the time of the secondary development. It can be peeled off cleanly, and the independence of ink adhesion between latent image dots can be improved. Although an infrared lamp is used as the heating means 11 in this example, a ceramic heater can be used in addition to the infrared lamp. The heating temperature by the heating means 11 is 5
0 to 300 ° C, more preferably 100 to 180 ° C, and the heating time is 1 msec to 10 sec, more preferably 10 m.
Seconds to 1 second. The heating by the heating means 11 may be performed after the liquid adhering to the latent image portion is dried after the primary development,
It may be performed in a state where the liquid is attached for the purpose of both drying and heating the recording body 1. However, in the latter case, it is necessary to heat the resin layer so that the resin layer is not uniformly formed due to boiling and foaming of the liquid.

FIG. 7 shows still another configuration example according to the present invention. In this configuration example, latent image formation and primary development are integrated, and heating means 1 is provided between primary development section 4 and secondary development section 5.
1, a ceramic heater is used as the heating means 11.

If the liquid used in the above-mentioned primary development is hard to evaporate, the liquid will not dry by the secondary development, and the resin layer cannot be formed in the latent image portion. Therefore, it is preferable that the primary developing liquid easily evaporate. Conversely, in the primary development, the change in the physical properties of the liquid due to evaporation during standing is a problem. In order to solve this, it is desirable to provide a means for sealing the primary developing section 4 during non-printing. FIG. 8 shows an example thereof, in which the developing means of the primary developing section 4 is a sponge roller 12, and the sponge roller 12 can be brought into contact with and separated from the recording medium 1. The sponge roller 12 is detached from the recording medium 1 at the time of non-printing. The lid 14 of the closed container 13 is opened so that the sponge roller 12 comes into contact with the recording body 1 during printing.

[0037]

EXAMPLES Next, the present invention will be described more specifically by way of examples.

(Preparation of Recording Body) Recording layer material: Fluorine-containing acrylate material viscoat 17
F (manufactured by Osaka Organic Chemical Industry Co., Ltd.) (Synthesis method: solution polymerization-solution: 1,1,1-trichloroethane) Recording medium substrate: Seamless film of polyimide (Toray
DuPont: Kapton) [diameter 30 mm] Coating method: Fluorine-containing acrylate material Freon 11
Dilute with 3 and dip coat on polyimide film,
Then, it is dried at 130 ° C. for 1 hour to obtain a recording film. Ink used: Water-based black ink Latent image forming liquid: Water Primary developer: Water 70 wt% + ethylene-vinyl acetate copolymer (752 made by Sumitomo Chemical Co., Ltd.) 30 wt% Heating source: Thermal head Moving speed of recording medium: 20 mm / sec Device configuration: method shown in FIG. 1 (one primary development is performed on the sponge roller
It was impregnated with the next developer and brought into contact with the recording material. As a result of the implementation, the amount of ink adhered to the latent image dots increased 1.3 times, and the image became sharp.

Example 2 (Preparation of recording material) Recording layer material: Fluorine-containing acrylate material viscoat 17
FM (Osaka Organic Chemical Industry Co., Ltd.) (Synthesis method: solution polymerization-solution: 1,1,1-trichloroethane) Recording medium substrate: Polyimide seamless film (Toray
DuPont: Kapton) [diameter 30 mm] Coating method: Fluorine-containing acrylate material Freon 11
Dilute with 3 and dip coat on polyimide film,
Then, it is dried at 130 ° C. for 1 hour to obtain a recording film. Ink used: Water-based black ink Latent image forming liquid: Primary developer Primary developer: Water 80 wt% + ethylene-vinyl acetate copolymer (Sumitomo Chemical Co., Ltd. 752) 10 wt% + polyvinyl butyral (Sekisui Chemical Co., Ltd. BW- 1) 10 wt% Heating source: Thermal head Recording medium speed: 20 mm / sec Device configuration: Method of FIG. 7 (latent image formation and primary development were performed simultaneously. Heating after primary development was performed with a ceramic heater 110)
It was carried out by contacting the back side of the recording medium while keeping it at ℃. As a result, the amount of ink adhering to the latent image dots is 1.3 times higher than before, and the recording speed is double (4 times faster than before).
Even at 0 mm / sec), the dot independence of the latent image dots was maintained (conventionally, the dot independence was broken and abnormal adhesion occurred).

[0040]

(1) According to the first aspect of the invention, the ink adhesion to the latent image dots is improved, and a good transferred image can be obtained on the recording paper. (2) According to the invention of claim 2, in addition to the above effect, since the portion other than the latent image portion becomes ink repellent due to the heating of the recording medium after the primary development, the independence of the ink adhesion of the latent image dot becomes independent. As a result, a transfer image having higher quality can be obtained. (3) According to the third aspect of the invention, image formation can be performed reversibly by erasing the latent image. (4) According to the invention of claim 4, since the contact material supply means and the first developing section are integrated, the apparatus can be simplified and the recording time can be shortened. (5) According to the fifth aspect of the invention, since the first developing section is closed during non-recording, the problem of physical property change of the primary developer due to evaporation of the primary developer when left unsolved can be solved. A developer that can be easily evaporated can be used, and the resin layer can be easily formed on the latent image portion.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a recording apparatus of one configuration example according to the present invention.

FIG. 2 is an explanatory diagram of formation of an ink-philic resin layer after primary development.

FIG. 3 is a schematic view showing a recording apparatus having another configuration example according to the present invention.

FIG. 4 is a schematic view showing a recording apparatus of still another configuration example according to the present invention.

FIG. 5 is a schematic view showing a recording apparatus of still another configuration example according to the present invention.

FIG. 6 is a diagram showing how ink adheres when the surface of the recording medium is heated by a heating means after the primary development.

FIG. 7 is a schematic view showing a recording apparatus of still another configuration example according to the present invention.

FIG. 8 is an illustration of an example of a means for sealing the primary developing section during non-recording.

FIG. 9 is a diagram illustrating an outline of a recording device previously proposed by the present inventors.

FIG. 10 is a diagram showing a shape of a latent image formed on a recording medium.

FIG. 11 is a diagram showing how ink is attached when a latent image is formed in an analog character form.

FIG. 12 is a diagram showing how ink is attached when a latent image is formed in a dot shape.

13A is a diagram showing a state of heating for forming a latent image, and FIG. 13B is a diagram showing a target latent image shape and a latent image shape actually formed.

FIG. 14 is a diagram showing a state of abnormal adhesion of ink when a space between latent image dots is narrowed.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Recording medium 2 Heating means for latent image formation 3-1 Liquid (contact material) 3-2 Plate 4 Primary development part 5 Secondary development part 6 Transfer roller 7 Transfer paper 8 Cleaner 9 Heating for latent image deletion Means 11 Heating means after primary development

Claims (5)

[Claims] 1. The following contact material (B) is applied to the surface of the following recording medium (A).
To the heating temperature on the surface of the recording material (A) by selectively heating the surface of the recording material (A) or by contacting the surface of the recording material (A) with the contact material (B). Contact material (B) that forms a latent image with a receding contact angle
To the surface of the recording material (A), means for selectively heating the surface of the recording material (A) to form a latent image, developing means for making the latent image visible, and recording In the recording apparatus provided with a means for transferring the recording agent adhered on the body (A) to the recording paper, the developing means supplies a liquid containing a resin that shows wetting to the recording agent to form a latent image portion. A recording apparatus comprising: a first developing section for forming a resin layer on the first developing section; and a second developing section for supplying a recording agent to form a latent image after the resin layer is formed. (A) A recording body provided with a surface layer having a property of reducing a receding contact angle when heated and brought into contact with a liquid. (B) A liquid, a vapor, or a solid that becomes a liquid or generates a liquid or a vapor at a temperature at which the receding contact angle of the recording medium (A) starts to decrease. 2. A recording material for providing a portion other than a latent image portion with a recording repellency between the first developing portion and the second developing portion.
2. A means for heating (A) is provided.
The recording device according to 1. 3. The recording apparatus according to claim 1, further comprising a means for erasing the latent image by heating after the transfer means for transferring the recording paper. 4. The supply means for the contact material (B) and the first developing section of the developing means are used by using as the contact material (B) a liquid containing a resin that wets the recording material. The recording device according to claim 1, wherein the recording device is one. 5. The recording apparatus according to claim 1, further comprising means for closing the first developing portion when not recording and opening it when recording.