WO1999017938A1

WO1999017938A1 - Image formation apparatus, image formation methods and plate making method

Info

Publication number: WO1999017938A1
Application number: PCT/JP1998/004373
Authority: WO
Inventors: Masami Iwayama; Tatsuo Fujinami; Kouichi Sasakura
Original assignee: Star Micronics Co., Ltd.
Priority date: 1997-10-03
Filing date: 1998-09-29
Publication date: 1999-04-15
Also published as: AU9187498A

Abstract

An image formation apparatus comprising an image forming body having a substrate and a self assembly compound having first and second chain portions having mutually different wettability; a first heater for making wettability of the surface of the image forming body uniform; a second heater for providing first and second areas having mutually different wettability on the surface of the image forming body; a developing device for supplying an ink to the surface of the image forming body; and a transfer device for transferring the ink adhering to the surface of the image forming body to a recording medium. This image formation apparatus makes it possible to repeatedly use a printing plate, and to accomplish high-speed printing, reduction of the size of the apparatus and a lower running cost when a limited number of copies are printed.

Description

Description Image forming apparatus, image forming method and plate making method

The present invention relates to an image forming apparatus, an image forming method, and a plate making method. More specifically, the present invention relates to an image forming apparatus, an image forming method, and a plate making method, which are characterized by an image forming body used as a printing plate.

Background art

Conventional printing presses include electrophotographic printing presses and stencil printing presses.

In an electrophotographic printing machine, the entire surface of a clean drum is charged by corona discharge, and the charged drum surface is selectively exposed. The exposed surface is discharged, and a latent image can be formed by charged and uncharged areas on the drum surface. After the formation of the latent image, an image is formed by attaching toner to the drum surface by the developing unit. The formed image is transferred onto the recording medium in the transfer unit, and is fixed on the recording medium by the fixing unit.

On the other hand, in a stencil printing machine known as an office light printing machine, a perforation is selectively formed in a base paper by a thermal head to form a stencil. The produced plate is wound around a drum, and thereafter ink is supplied to the stencil from the inside of the drum, and an ink image is formed by the ink passing through the perforations. Then, the ink image is transferred onto the recording medium in the transfer section.

Disclosure of the invention

However, in an electrophotographic printing machine, a process for forming a latent image for each sheet is required when printing a plurality of sheets, and thus there is a limit to increasing the printing speed.

The stencil printing machine has the following disadvantages. That is, after printing is completed, the plate wound on the drum must be discarded from the drum. For this reason, discard A mechanism to remove the plate material from the drum and a place to store the stripped ink plate are required, and a complicated structure to take it out of the machine is required. In addition, since ink is attached to the stencil, the amount of ink used becomes unnecessarily large, which leads to an increase in the cost of printed matter. A new stencil sheet is required to form the stencil. Therefore, the running cost per sheet when printing a large number of copies is low, but the running cost per sheet when printing a small number of copies is high. In addition, printing new images requires processes such as discharging used stencils, forming plates on new stencils, and winding them around drums, which complicates the equipment configuration and increases the size of the equipment. There is also a drawback that it will

The present invention has been made in view of the above-mentioned problems of the related art, and since it is possible to efficiently form and erase a printing plate with good reproducibility, it is possible to repeatedly use the same printing plate. To provide a new image forming apparatus and image forming method capable of realizing high-speed printing, miniaturization of the apparatus and low running cost during printing, and a method of manufacturing such a printing plate for image forming. Is I-like.

The present inventors have conducted intensive studies to achieve the above object, and as a result, as a substance (ie, a self-assembling compound) that is adsorbably detachably adsorbed on the surface of a substrate and is arranged almost regularly by intermolecular interaction, A compound having a first chain portion and a second chain portion having different wettability from each other is employed, and a substrate coated with a film formed thereby (that is, a self-assembled monomolecular film) is used as an image forming body. The present inventors have found that the above object can be achieved by forming at least a part of the self-assembled monomolecular film in a specific atmosphere to form a printing plate by partially changing its surface wettability. Was completed.

That is, the image forming apparatus of the present invention

A base material, adsorbed on the surface of the base material to form a self-assembled monomolecular film, and An image forming body comprising a self-assembling compound having a first chain portion and a second chain portion having different wettability,

The heating of the self-assembled compound forming the self-assembled monolayer in a first specific atmosphere has a primary effect on the surface properties of the self-assembled monolayer. And a first heating device that changes the state of the second chain portion to the state of the second chain portion to uniform the wettability of the surface of the image forming body.

By partially heating the self-assembled monolayer forming the self-assembled monolayer in the second specific atmosphere, the surface properties of the self-assembled monolayer are preferentially affected. Changing the state of the second chain portion to the state of the first chain portion, and providing a first surface and a second surface having different wettabilities on the surface of the image forming body. 2, heating equipment,

A developing device that supplies ink that is preferentially attached to either the first surface or the second surface on the surface of the image forming body; and

A transfer device for transferring the ink adhered to the surface of the image forming body to a recording medium.

The image forming apparatus of the present invention may further include a film forming apparatus that supplies the self-assembled compound to the surface of the base material and forms a self-assembled monomolecular film on the surface of the base material.

The image forming method of the present invention comprises:

A base material, and a self-assembling compound having a first chain portion and a second chain portion which are adsorbed on the surface of the base material to form a self-assembled monomolecular film and have different wettability from each other. In the image forming body, the self-assembling compound forming the self-assembled monolayer is heated in a first specific atmosphere, thereby preferentially affecting the surface characteristics of the self-assembled monolayer. A first heating step of changing the state of the first and second chain portions to the state of the second chain portion to make uniform the wettability of the surface of the image forming body; By partially heating the self-assembled monolayer forming the self-assembled monolayer in the second specific atmosphere, the surface properties of the self-assembled monolayer are preferentially affected. Changing the state of the second chain portion to the state of the first chain portion, and providing a first surface and a second surface having different wettabilities on the surface of the image forming body. 2, heating step,

A developing step of supplying, to the surface of the image forming body, ink that is preferentially attached to either the first surface or the second surface; and

A transfer step of transferring the ink adhered to the surface of the image forming body to a recording medium.

The image forming method of the present invention may further include a film forming step of supplying the self-assembling compound to the surface of the base material and forming a self-assembled monomolecular film on the surface of the base material.

The plate making method of the present invention comprises:

Self-assembly by adsorbing on the surface of the base material and the base material ^1. The first chain portion and the second chain portion which form a domain and have different wettability from each other. A self-assembled unit forming the self-assembled monolayer and the crotch in the first specific atmosphere, thereby giving priority to the surface characteristics of the ΙΊL¾f monomolecular film. The first influence that changes the state of the first and second chains from the state of the first and second chains to the state of the second chain part to make the wettability of ^ Ifn of the image forming body uniform is obtained. Thermal process,

By partially heating the self-assembled monolayer forming the self-assembled monolayer in a second specific atmosphere, the surface properties of the self-assembled monolayer are preferentially affected. Is changed from the state of the second chain part to the state of the first chain part, and the first surface and the second surface having different wettability are provided on the surface of the image forming body. A second heating step,

Is included. The plate making method of the present invention may further include a film forming step of supplying the self-assembling compound to the surface of the base material and forming a self-assembled monomolecular film on the surface of the base material. The self-assembling compound according to the present invention is a spontaneously uniform monomolecular adsorption film (self-assembled monolayer) on a predetermined substrate surface (solid-liquid interface), as described in detail later. Having a first chain portion and a second chain portion having different wettabilities and heating at least a part of the self-assembled monolayer in a specific atmosphere. It is a compound whose surface wettability can be partially changed by performing the method. Therefore, by employing the self-assembled compound according to the present invention, it is possible to irreversibly change the wettability of the surface of the self-assembled monolayer without desorbing the self-assembled compound. .

As such a self-assembling compound according to the present invention, the first chain portion may be a group selected from the group consisting of a water-repellent / lipophilic alkyl group and a water-repellent / oil-repellent halogen-substituted alkyl group. Wherein the second chain is a group selected from the group consisting of a hydrophilic / lipophilic polyethylene glycol residue and a hydrophilic / lipophilic polyethylene glycol monomethyl ether residue. Is preferred. In the self-assembling compound according to the present invention, the first chain portion is a halogen-substituted alkyl group having stronger water repellency and oil repellency, and the second chain portion is weaker water repellency and lipophilicity. May be an alkyl group having

As such a self-assembling compound, the following general formula (I)

(I

[In the formula (I), ^one of R ¹ and R ^{2 represents} a group selected from the group consisting of an alkyl group having 3 to 22 carbon atoms and a halogen-substituted alkyl group having 3 to 22 carbon atoms. And the other of R ¹ and R ² is a polyethylene glycol residue having a repeating unit of 1 to 10, a polyethylene glycol monomethyl ether residue having a repeating unit of 1 to 10, and a halogen-substituted alkyl having 3 to 22 carbon atoms. R ¹ and R ² are not the same, and R ⁴ may be the same or different and each represents an alkyleneimino group having 1 to 22 carbon atoms. Show]

The maleic acid derivative represented by is particularly preferable. In this case, by setting the first specific atmosphere to an atmosphere containing a polar solvent and setting the heating temperature in the atmosphere to 50 to 100 ° C., the surface characteristics of the self-assembled monomolecular film are changed to the first properties. It is preferable to change the state in which the second chain part has a preferential influence to the state in which the second chain part has a preferential influence, and on the other hand, polarize the second specific atmosphere. The second chain portion preferentially affects the surface characteristics of the self-assembled monomolecular film by setting the atmosphere in a solvent-free atmosphere and setting the heating temperature in the atmosphere to 100 to 200 ° C. Preferably, the state is changed from a state in which the first chain portion is influencing with priority. Further, in this case, the first surface exhibiting water repellency and the second surface exhibiting hydrophilicity on the surface of the image forming body, or a stronger water repellency is obtained by heating in the second specific atmosphere. It is possible to suitably provide a first surface that exhibits low water repellency and a second surface that exhibits weaker water repellency.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a flowchart showing a preferred embodiment of the image forming method of the present invention.

2A to 2G are schematic cross-sectional views showing the state of the surface of the base material in various steps of a preferred embodiment of the image forming method of the present invention.

FIG. 3 is a schematic diagram showing a preferred embodiment of the image forming apparatus of the present invention.

Figure 4 shows an example of the reaction scheme of the method for producing a maleic acid derivative in Example 1. FIG.

5A to 5D are structural formulas showing the maleic acid derivatives obtained in Examples 1 to 4, respectively.

FIGS. 6A to 6D are schematic diagrams respectively showing states in which the maleic acid derivatives obtained in Examples 1 to 4 are adsorbed on the gold surface.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference characters.

First, the self-assembled monolayer according to the present invention will be described.

When a so-called self-assembling compound is adsorbed (chemically adsorbed) on the surface of a specific substrate, its molecular assembling properties (adsorption by the adsorptive functional group and intermolecular interaction by the group bonded to the adsorptive functional group) ), The self-assembling compounds are arranged almost regularly on the substrate surface. Self-assembled film formed by such sequences (called Self -Assembled Monolayers, abbreviated as SAM) self-assembling monomolecular film or a self-assembled monolayer _c also called, in this way, the substrate surface Arranging the active compounds regularly is called modifying the self-assembling compound on the surface of the base material. Such phenomena have been reported in RG Nuzzo et al., J. Am. Chem. So, 105 (1983), 448 4483, etc., and indicate that a specific material (substrate and self-assembling compound) It is known that the above phenomenon occurs. This document is incorporated herein by reference.

The substrate according to the present invention is not particularly limited. Examples thereof include metals such as gold, platinum, silver, copper, and aluminum; oxides such as aluminum oxide and silicon oxide; resins such as polyethylene; and selenium such as zinc selenide. And metal such as gold, platinum and silver, and oxides such as aluminum oxide and silicon oxide are preferable, and gold and silver are particularly preferable.

Further, the self-assembling compound according to the present invention spontaneously forms an almost uniform monolayer adsorption film on the surface of the substrate, and the first chains having different wettabilities from each other. Any compound that has a part and a second chain part and can partially change the surface wettability by heating at least a part of the self-assembled monomolecular film in a specific atmosphere may be used.

The different wettability described above includes a combination of water repellency, oil repellency, water repellency, and lipophilicity, a combination of water repellency, lipophilicity and hydrophilicity, and oil repellency, and a combination of water repellency, oil repellency, and hydrophilicity. And the first chain portion and the second chain portion may be any.

The self-assembling compound according to the present invention is not particularly limited, and examples thereof include the following maleic acid derivatives. Hereinafter, the maleic acid derivative suitable for the present invention will be described. Such a maleic acid derivative has the following general formula (I)

(I)

It is a compound that is eclectic. In the above formula (I), ^one of R ¹ and R (in the first chain, in sequence) is an alkyl group having 3 to 22 (preferably 4 to 16) carbon atoms (-CH ,,,,- ,: HF3 to 22) or a halogen having 3 to 22 (preferably 4 to 16) carbon atoms / JP98 / 04373 substituted alkyl group _{_{_{(- C n A a H b}}} : A = F, Br or Cl, n = 3~22, a, b are each an integer of 1 or more, a + b = 2n + l ) is . If the number of carbon atoms is too large, the change in wettability tends to be too slow, while if the number of carbon atoms is too small, the change in wettability tends to be small. Hereinafter, the above alkyl groups and halogen-substituted alkyl groups are sometimes collectively referred to as “alkyl chain”.

The above-mentioned alkyl group and halogen-substituted alkyl group are not limited to linear ones, but may be branched ones. Further, the halogen-substituted alkyl group according to the present invention does not need to be completely substituted with halogen, but may be partially substituted with halogen. Incidentally, halogen location換率{value of _{_{_{-C n A a H b 100 xa}}} / (2n + l) [%] in (A is halogen)} in halogen moiety substituted alkyl groups are 3 0% or more It is preferable that the halogen-substituted alkyl group is completely substituted with halogen in the range of at least 20% (based on the number of carbon atoms in the alkyl group) from the terminal (the end not bonded to the carboxyl group). preferable. If the halogen substitution rate is too low, the surface wettability of the self-assembled monolayer tends to be independent of the nodogen when the self-assembled monolayer is formed. This is because they tend to be affected by the fundamentals.

In the above formula (I), the other of R ¹ and R ² (for example, the second chain portion) is a polyethylene glycol residue having a repeating unit of 1 to 10 (preferably 2 to 8). _{_{(- (CH 2 CH 2 0}} ) P - H: p = l~; 10), repeating units 1-1 0 polyethylene glycol monomethyl ether residues (preferably _{2~8) (- (CH 2 CH} 2 0) _q - CH _3: q two 1-10) or a C 3 - halogen-substituted alkyl group (_C _n _{a a} H _b 2 2 (preferably 4 ~ 1 6): a = F, Br or (1, 11 d 3 to 22 and &, 1) each represent an integer of 1 or more, a + b = 2n + 1). If the number of the repeating units is too large, the change in wettability tends to be too slow, while if the number of the repeat units is too small, the change in wettability tends to be small. Note that R ¹ and R ² are not the same halogen-substituted alkyl group. The polyethylene glycol residue and polyethylene glycol monomethyl ether residue described above may be The groups are collectively referred to as “ethylene glycol chains”. Further, the above-mentioned halogen-substituted alkyl group is referred to as “halogen-substituted alkyl chain”.

Note that two R ^{1 's} in the above formula (I) may be the same or different, and similarly, two R ^{2' s} in the formula (I) may be the same or different. In the formula (I), R ¹ and R ² bonded to the R ³ side may be exchanged, or R ¹ and R ² bonded to the R ⁴ side may be exchanged. You may be surprised.

Further, R ³ and R ⁴ in the above formula (I) may be the same or different, and each has 1 to 22 (preferably 2 to 16) alkylene imino group (-(CH ₂ ) _r -NH-: r = 1 to 22).

As described above, the maleic acid derivative suitable for the present invention comprises a disulfide group (-S-S-) as an adsorptive functional group and an alkyl chain and ethylene glycol chain (or alkyl chain having a specific structure) bonded thereto. And halogen-substituted alkyl chains) (R ¹ and R ² above), and can be used as a self-assembling compound. In other words, when such a maleic acid derivative is adsorbed on the surface of a specific base material, the molecular assembling property (the adsorption effect of the disulfide group, which is the adsorption functional group, and the intermolecular force of the chain bonded to the adsorption functional group). Due to the interaction), the maleic acid derivative is arranged almost regularly on the surface of the base material to form a self-assembled monolayer. The base material that can be used to modify the maleic acid derivative suitable for the present invention is not particularly limited, and examples thereof include metals such as gold, platinum, silver, copper, and aluminum. Above all, it is particularly preferable to use gold or silver as a base material, since it shows a specific affinity for gold and silver.

In the self-assembled monolayer formed by the maleic acid derivative, the alkyl chain and the ethylene glycol chain (or the alkyl chain and the halogen-substituted alkyl chain) (the above R ¹ and R ² ) have the terminal (adsorption function). (The end on the side not bonded to the group) is a surface with almost uniform spacing, and the wettability of the monomolecular film surface is not affected by the substrate surface. Therefore, by controlling the terminal functional groups on the surface of the self-assembled monolayer, it is possible to impart various characteristics to the surface. And Such a maleic acid derivative has an alkyl chain and an ethylene glycol chain or a halogen-substituted alkyl chain having different wettability with each other, and is heated in a specific atmosphere as described later in detail. In this way, the surface properties of the self-assembled monolayer are preferentially affected by the reversible change from the alkyl chain state to the ethylene glycol chain or halogen-substituted alkyl chain state or vice versa. Is possible. Therefore, in the self-assembled monolayer composed of the maleic acid derivative, it is possible to reversibly change the wettability of the surface without desorbing the self-assembled compound.

That is, for example, an alkyl group in which only a hydrogen atom is bonded to the carbon main chain is water-repellent and lipophilic, and a polyethylene glycol residue or a polyethylene glycol monomethyl ether residue (an ethylene glycol chain) containing an ether bond in the carbon main chain. ) Is hydrophilic 'lipophilic. Therefore, by employing a maleic acid derivative having an alkyl group and an ethylene glycol chain as a self-assembling compound, the surface of the monomolecular film can be reversibly switched between water repellent, lipophilic and hydrophilic, and lipophilic. It can be changed. Alkyl groups in which some or all of the hydrogen atoms have been substituted with halogen (such as fluorine) are water- and oil-repellent, so that a maleic acid derivative having a halogen-substituted alkyl group and an ethylene glycol chain can be used as a self-assembling compound. As a result, the surface of the monomolecular film can be reversibly changed between water-repellent / oil-repellent and hydrophilic / lipophilic. Furthermore, by adopting a maleic acid derivative having an alkyl group and a halogen-substituted alkyl group as a self-assembling compound, the surface of the monomolecular film can be provided with stronger water repellency / oil repellency and weaker water repellency / lipophilicity. It is possible to change reversibly between them.

The conditions for reversibly changing the surface wettability include a monomolecular film surface using a maleic acid derivative having an alkyl chain and an ethylene glycol chain. Heating at 100 ° C has a major effect on the surface properties because of the state of the alkyl chains in ethylene glycol. To the state of a chain. On the other hand, for example, heating at 100 to 200 ° C in an atmosphere free of polar solvents, the surface properties are preferentially affected by the change from the state of ethylene glycol chains to the state of alkyl chains. Move to

In the case of a monomolecular film surface using a maleic acid derivative having an alkyl group and a halogen-substituted alkyl group, the alkyl group has a relatively lower water repellency than the halogen-substituted alkyl group. By heating at 50 to 100 ° C. in the presence atmosphere, the state which preferentially affects the surface characteristics is shifted from the state of the halogen-substituted alkyl group to the state of the alkyl group. On the other hand, for example, by heating at 100 to 200 ° C. in an atmosphere where no polar solvent is present, the surface properties are preferentially affected by the state of the alkyl group from the state of the halogen-substituted alkyl group. Move to

Therefore, the self-assembled monolayer composed of the maleic acid derivative suitable for the present invention can reversibly change the surface wettability without desorbing the self-assembled compound. It can be suitably used as a surface member constituting an image forming body of a forming apparatus.

The self-assembled compound according to the present invention is not limited to arsenic, and can form a self-assembled monolayer on a predetermined base material surface and has a wettability on its surface without desorbing the L jliy compound. Any metal can be used as long as it can reversibly change it. However, when gold is used as the base material because it shows a specific affinity for gold, Preferred are disulfide compounds, sulfide compounds, and thiol compounds having the same alkyl chains and ethylene glycol chains (or alkyl chains and halogen-substituted alkyl chains).

Next, preferred embodiments of the image forming method of the present invention and the plate making method of the present invention will be described in detail with reference to FIGS. 1 and 2A to 2G. Here, a preferred embodiment of a method for forming a self-assembled monolayer using the maleic acid derivative as a self-assembled compound and applying the same to image formation will be described in detail. ¾ 1 is a book FIG. 2 is a flowchart (steps S101 to S104 in FIG. 1 correspond to a plate making method) showing a preferred embodiment of the image forming method of the present invention, and FIGS. 2A to 2G show an alkyl chain and ethylene glycol. Schematic cross-sectional views showing the state of the substrate surface in each step in the case of using a maleic acid derivative having a chain (Figures 2A to 2D correspond to the state of the substrate surface in the various steps of the plate making method) ).

In the present embodiment, first, the surface of the substrate 1 is immersed in a solution 3 of a self-assembling compound (maleic acid derivative) 2 to supply the self-assembling compound 2 to the surface of the substrate 1. In this way, as shown in FIG. 2A, the self-assembling compound 2 is spontaneously arranged and adsorbed almost uniformly on the surface (solid-liquid interface) of the substrate 1, and the monolayer adsorbed film (self An aggregated monomolecular film) is formed, and an image forming body 4 is obtained (film forming step S101). In FIG. 3, respectively adsorbing functional group (disulfide group) 2 a, the alkyl chain of 2 b ^ Echire glycol chain 2 b _2. As shown in FIG. 2 B, adsorptive functional group of the self-assembling compound 2 is adsorbed on the surface of the substrate 1, the alkyl chain 2 b and Echirenguri call chain 2 b ₂ of the end of the self-assembling monolayer surface ( Exposed side).

Factors that affect the formation rate of such a self-assembled monolayer include temperature, type of solvent, solution concentration, and the like.The formation rate increases depending on the combination of the self-assembled compound and the base material used. As appropriate. The formation of a monomolecular film is possible at room temperature. The solvent is not particularly limited, but preferably has low penetration into the monolayer, and is preferably an organic solvent from the viewpoint of solubility of the self-assembling compound. Among them, ethanol (protonic polar solvent), ethyl acetate (non-protonic polar solvent), tetrahydrofuran (non-protonic polar solvent), getyl ether (non-protonic polar solvent), hexane (Non-polar solvent) and the like are preferably used. Further, the solution concentration is preferably at least 0.001 mM, particularly preferably at least 0.01 mM and not more than 1 O mM in order to surely obtain a monomolecular film. If the solution concentration is too low, the time required for forming the monolayer becomes longer, or defects tend to be generated in the monolayer, 73 On the other hand, if the solution concentration is too high, the self-assembling compound itself tends to hinder self-assembly, or there is a possibility that excess self-assembly compound may precipitate on the surface. The formation of the self-assembled monomolecular film on the surface of the base material does not necessarily have to be performed until the monomolecular film is completely formed (until the compound density becomes saturated). It suffices until the compound is almost uniformly adsorbed and the wettability of the monomolecular film surface is different from the wettability of the substrate surface. Therefore, even when it takes several minutes to several hours to obtain a complete monomolecular film, it is necessary to obtain an image forming body having a different wettability with a substantially uniform monomolecular film in several seconds to several tens of minutes. Is also possible.

Next, the self-assembled monomolecular film formed on the image forming body 4 is washed with a solvent to remove self-assembled compounds not involved in the film formation, and further dried to remove the solvent (washing / drying step). S102). Note that such a washing step is not necessarily essential, and may be a drying step alone.

Then, as shown in FIG. 2C, the entire surface of the self-assembled monolayer is heated in a first specific atmosphere (in this case, 50 to 100 ° C. in water vapor), thereby obtaining Chi glycol chain 2 b ₂ becomes affecting preferentially to the characteristics of the entire surface, the entire surface of the self-assembling monolayer is hydrophilic-lipophilic (first heating step (initial step) S103).

Next, as shown in FIG. 2D, the self-assembled monolayer is partially heated in a second specific atmosphere (in this case, 100 to 200 ° C. in dry air). As a result, the alkyl chains 2 have a preferential effect on the surface properties in that area. As a result, the self-assembled monolayer partially becomes water-repellent (water-repellent and oil-repellent when the alkyl chain 21 ^ is a halogen-substituted alkyl group, and water-repellent and lipophilic when the alkyl group 21 ^ is an alkyl group). An image forming body 4 (that is, a printing plate for image formation (transfer)) having a water repellent surface (first surface) 7 and a hydrophilic surface (second surface) 8 having different wettabilities is obtained. (Second heating step (printing plate forming step) S104).

The heat treatment conditions (surface, characteristics, etc.) in the first and second specific atmospheres described above Atmosphere, temperature, time, etc., as conditions for reversibly changing the group that exerts preferential influence) are selected according to the self-assembling compound to be used. In some cases, the above conditions are preferred.

Thereafter, ink (aqueous ink) 12 is supplied from the developing device 11 to the surface of the image forming body 4 (developing step S105). As shown in FIG. 2E, the water-based ink 12 is preferentially attached to the hydrophilic surface 8 avoiding the water-repellent surface 7, thereby forming an ink image. Then, the recording medium 13 is brought into contact with the surface of the image forming body 4 as shown in FIG. 2F, and the ink 12 attached to the surface of the image forming body 4 is transferred to the recording medium 13 (transfer process) S106). As a result, the first printing sequence (printing process) is completed. C To continue printing multiple copies of the same image, remove the untransferred ink 12 attached to the surface of the image forming body 4. (The untransferred ink removing step S107) As shown by A in FIG. 1, the developing step S105, the transferring step S106, and the untransferred ink removing step S107 are repeated a predetermined number of times. It is not always necessary to remove untransferred ink every time.

Thus, in the image forming method of the present invention, the same printing plate can be used repeatedly. Therefore, according to the present invention, it is not necessary to form a latent image for each sheet, which is required in a conventional electrophotographic printing machine, and high-speed printing can be performed.

After the desired number of copies have been printed, as shown in FIG. 2G, the self-assembled monomolecular film is again formed in the first specific atmosphere (in this case, 50 to 100 ° C. in water vapor). By heating the entire surface, the ethylene glycol chains 2 b 2 have a priority on the properties of the entire surface, and the entire surface of the self-assembled monomolecular film becomes hydrophilic and lipophilic (first heating step ( Initialization step) S103). Thereafter, by repeating the above steps (S104 to S107), a desired number of copies are printed for each of the plurality of images.

Thus, in the image forming method of the present invention, the same image forming body can be repeatedly used for a plurality of images without desorbing the self-assembling compound. In addition, the formation and erasing of the printing plate can be performed by a simple treatment such as heating in a specific atmosphere. Therefore, according to the present invention, complicated devices such as stencil discharging and wrapping new stencil required for the conventional stencil printing machine are not required, and high-speed image formation can be achieved with a small and simple device. Becomes

As described above, the preferred embodiments of the image forming method and the plate making method of the present invention have been described in detail, but such methods are not limited to the above embodiments.

For example, in the above embodiment, as a method of forming a self-assembled monomolecular film, a method by immersion of a substrate into a solution is shown. However, such a method of forming a self-assembled monolayer may be a method of spraying a solution onto a base material described later, or a method of supplying the solution to the base material via a roller or a blade.

Further, in the above embodiment, the heat treatment in steam is given as the first specific atmosphere, and the heat treatment in dry air is given as the second specific atmosphere. However, they may be reversed. Alternatively, an atmosphere containing another polar solvent may be used, and an atmosphere containing no other polar solvent may be used instead of the dry air.

Further, in the above embodiment, the case where the water-based ink is used is shown. However, oil-based ink may be used. In this case, Shank's M: ink has priority over lipophilic oil, avoiding the repellent surface. Attached. In addition, prior to the supply of the oil-based ink, water (which may contain an additive or the like) may be supplied before the supply of the oil-based ink, in which case the water preferentially adheres to the hydrophilic surface avoiding the water-repellent surface. After that, the oil-based ink is preferentially attached to the lipophilic surface.

Further, in the above embodiment, the case where a maleic acid derivative having an alkyl chain and an ethylene glycol chain is used is shown, but a maleic acid derivative having a halogen-substituted alkyl group and an alkyl group is used. Is also good. In that case, the surface on which the halogen-substituted alkyl group has a preferential effect has stronger water repellency and oil repellency, and the surface on which the alkyl group has a preferential effect has weaker water repellency and lipophilicity. Next, a preferred embodiment of the image forming apparatus of the present invention will be described in detail with reference to FIG. In the drawings, the same or corresponding portions are denoted by the same reference characters. FIG. 3 is a schematic diagram showing a preferred embodiment of the image forming apparatus of the present invention. A drum lb having a gold film la deposited on its surface was used as a substrate 1 for image formation. The drum lb is rotatably supported and is driven to rotate in the direction of arrow C. The configuration of the image forming apparatus (printing machine) will be described in the order of the rotation direction of the drum lb.

Below the drum lb, a film forming apparatus (film forming apparatus) 20 for forming a self-assembled monomolecular film composed of the self-assembling compound 2 on the surface of the gold film la is installed. The film forming device 20 is composed of a solution force cartridge 20a filled with the solution 3 of the self-assembling compound 2, and a solution sprayer 20b. The solution cartridge 20a is filled with, for example, a solution of the maleic acid derivative. Next, a fan 20c for drying the surface of the gold film la supplied with the solution from the film forming device 20 is provided.

Next, the entire surface of the image forming body 4 on which the self-assembled monomolecular film is formed is heated in a first specific atmosphere (here, water vapor), and the first heating for initializing the surface of the image forming body 4 is performed. Equipment (steam heating equipment) 14 are installed.

Subsequently, the image forming body 4 on which the self-assembled monomolecular film is formed is heated in a second specific atmosphere (here, dry air), and a second heating device (a first heating device) for forming a printing plate is used. (Malhead) 5 has been installed.

Next, a developing device (developing device) 11 for forming an ink image on the image forming body 4 on which the printing plate has been formed is provided. The developing device 11 includes an ink supply device lla, an ink cartridge llb, an ink (water-based ink) llc, an ink supply roller lid, and an ink application roller lie.

Further, a transfer device 21 for transferring the ink image formed on the image forming body 4 by the developing device 11 to the recording medium 13 is provided above the drum lb. The transfer device 21 includes a transfer drum 21c, a paper feed roller 21a, and a platen roller 21b. The transfer drum 21c rotates in the direction of arrow D in synchronization with the rotation of the image forming body 4. I have.

Further, a key for removing untransferred ink on the drum lb and the transfer drum 21c is provided. / JP98 / 04373 Link cleaner 22 is installed. Each of the ink cleaners 22 includes a cleaning buff 22a and a winding shaft 22b.

Next, the operation of the above device will be described.

First, impurities on the surface of the gold film la are removed by heating the entire surface of the gold film la using a halogen lamp (not shown). As a result, a denser self-assembled monolayer can be formed.

Subsequently, for example, the solution of the maleic acid derivative is supplied to the surface of the gold film la by the solution sprayer 20b of the film forming apparatus 20. Then, the surface of the gold film la to which the solution has been supplied is dried by the fan 20c. On the surface of the dried gold film la is as shown in FIG. 2 B, self-assembling monomolecular film 2 is uniformly having a first strand portion 2 and the second strand portion 2b ₂ of wettability are different from each other It is formed.

Subsequently, the entire surface of the gold film la on which the self-assembled monomolecular film 2 is uniformly formed is heated in a first specific atmosphere by a first heating device (steam heater) 14. Figure 2 as shown and C, the self-assembled chain part 2 on the surface characteristics of affecting preferentially in the first and second monomolecular films, 21) from the _second state the second strand portion 2b ₂ And the wettability of the surface of the image forming body becomes uniform.

Next, when the self-assembled monomolecular film 2 is partially heated in the second specific atmosphere by operating the second heating device (thermal head) 5, as shown in FIG. The change in the state of the second chain 2b2 from the state of the _second chain 2b to the state of the first chain 2 that has a primary effect on the surface properties of the monolayer is different from each other on the surface of the image forming body. A first surface (for example, a water-repellent surface) 7 and a second surface (for example, a hydrophilic surface) 8 are formed. Thus, the surface of the image forming body 4 has partially different wettability. Therefore, an optional printing plate can be formed on the surface of the image forming body 4 by selective heating using the thermal head 5.

Next, when the printing plate passes through the developing device 11, an aqueous ink 11c is supplied to the surface of the image forming body 4 on which the printing plate has been formed, thereby forming an ink image. You. The water-based ink 11c does not adhere to the water-repellent surface 7 (non-image area), and the water-based ink 11c adheres only to the hydrophilic surface 8 (image area). The film thickness of the ink 11c is adjusted by the surface roughness of the supply roller and the application roller and the pressure between the supply roller and the application roller and the image forming body 4, and the ink 11c is supplied onto the image forming body 4. You.

Then, the recording medium 13 is supplied in the direction of arrow E by the paper feed roller 21a in synchronization with the rotation of the transfer drum 21c, and the recording medium 13 is pressed against the transfer drum 21c by the platen roller 21b. ing. The ink image is transferred from the transfer drum 21c to the recording medium 13 while the recording medium 13 is in contact with the transfer drum 21c. Thereafter, the recording medium 13 to which the ink image has been transferred is ejected in the direction of arrow E (a sheet ejection mechanism is not shown).

Untransferred ink may remain on the surfaces of the image forming body 4 and the transfer drum 21c after the completion of the transfer printing step. The remaining untransferred ink is removed by the ink cleaner 22. The cleaning puff 22a from which the untransferred ink has been removed is wound around a winding shaft 22b. Note that the shaking of the untransferred ink is not limited to the execution of every single sheet.When copy printing using the same printing plate, after the printing of a specific number of sheets (for example, every 5 sheets or every 10 sheets) ) May be performed. When the untransferred ink is not removed by the ink cleaner 22, the ink cleaner 22 is separated from the image forming body 4 and the transfer drum 21c.

When printing multiple copies of the same image, the film forming process and the printing plate forming process need not be performed again. Therefore, the image forming body 4 is sent to the image forming device 11 while holding the printing plate. During this time, the first heating device 14 and the second heating device 5 are not heated. After the heating step or the printing plate forming step, the first heating device 14 and the second heating device 5 are used for image formation so that the surface wettability of the self-assembling compound 2 is not changed by the residual heat. It is preferable to keep it away from body 4. Then, the aqueous ink 11c is supplied to the surface of the image forming body 4 by the developing device 11 and the re-formed ink image is transferred to the recording medium 13 in the transfer device 21. When the desired number of copies have been printed, the first heating device 14 is brought close to the drum lb and again heats the entire surface of the image forming body 4 in the first specific atmosphere. As a result, as shown in FIG. 2G, the surface properties of the self-assembled monolayer are preferentially influenced by the state of the first and second chain parts 2, 21) ₂ It changes to the second state of the chain portion 2b _2, wettability of the surface of the image forming body again becomes uniform. Subsequently, when printing a new print pattern, a new print pattern can be printed by executing the process from the step of reforming the printing plate on the surface of the gold film la in the same manner as described above. As described above, the preferred embodiment of the image forming apparatus of the present invention has been described in detail, but the apparatus of the present invention is not limited to the above embodiment.

For example, in the above embodiment, a drum lb on which a gold film la is deposited is used as the base material 1 for forming a self-assembled monolayer. However, as described above, the substrate and the self-assembling compound used in the present invention are not limited to those described above. Further, the first heating device (initializing device) may be a device capable of heating the self-assembled monomolecular film in the absence of a polar solvent such as a thermal head, and the second heating device may be used. The (printing plate forming device) may be a device capable of heating the I'l Lij combined monomolecular film in the presence of a polar solvent such as a steam heating device.

Further, oil-based ink may be used as the ink, and in that case, a water supply device for supplying water to the surface of the printing plate prior to the supply of the ink may be provided in the history. Hereinafter, the present invention will be described more specifically with reference to Examples, but the present invention is not limited to the following Examples.

(Synthesis example) Production of maleic acid derivative

Example 1

According to the reaction scheme shown in FIG. 4, the maleic anhydride derivative suitable for the present invention shown in FIG. 5 was produced. That is, first, 1.347 g (13.74 mmol) of maleic anhydride was added to 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluoro-octanol (n -CF _{: i} (C) 5 CH ₂ CH ₂ 0 11) 5.002 (13.74 thigh 01) was dissolved and refluxed at 100 ° C for 2 hours with stirring. Obtained 20 ml of dry hexane was added to the resulting product, and the mixture was refluxed at 80 ° C. for 1 hour with stirring, then cooled to room temperature and recrystallized. Thereafter, the mixture was filtered to obtain the compound (IV) shown in FIG. 4 (the above is Step 1).

Next, 2.67 (^ (16.26 orchid 01)) and 1.057 g (8.66 mol) of 4-dimethylaminopyridine were dissolved in 20 ml of dry dichloromethane, and the solution obtained in Step 1 was added to this solution. Separately, 5,000 g (10.82 mmol) of the compound (IV) was dissolved, and 2.680 g (12.99 t ol) of dicyclohexylcarpoimidide was dissolved in 20 ml of dry dichloromethane.

Then, to the solution in which the compound (IV) was dissolved, the dry dichloromethane solution of dicyclohexylcarbodiimide was dropped at a dropping rate of 1 ml / min. After the completion of the dropwise addition of the dried dichloromethane solution of dicyclohexylcarbodiimide, the reaction solution was kept at 0 ° C. and left for 5 minutes. Thereafter, the reaction solution was stirred at room temperature for 3 hours, and the precipitated dicyclohexylurea was filtered. Then, the filtrate was washed twice with 10 ml of aqueous citric acid solution and 10 ml of saturated aqueous sodium hydrogen carbonate solution, respectively. Thereafter, the reaction solution was dried over anhydrous magnesium sulfate, and the solvent was removed by distillation under reduced pressure to obtain a maleic acid-derived intermediate (II) shown in FIG. 4 (the above, Step 2).

Subsequently, 0.418 g (0.687 mmol) of the maleic acid-derived intermediate (II) shown in FIG. 4, 0.077 g (0.344 bandol ol) of cis amino dihydrochloride (S "CH ₂ CH ₂ NH ₂ ) ₂ '2HCl and Sodium hydrogen carbonate (0.086 g, 1.03 mmol) was dissolved in dry tetrahydrofuran (THF) (3 ml), the solution was refluxed at 50 ° C. for 66 hours, and the solvent was removed from the reaction solution by distillation under reduced pressure to obtain a crude product. The obtained crude product was dissolved in 3 ml of chloroform, washed three times with 10 ml of distilled water, and dried with anhydrous magnesium sulfate, and the by-product was filtered. Thereafter, the chloroform solution was removed from the chloroform solution by vacuum distillation to obtain a maleic acid derivative (I) as shown in Fig. 4 (the above, Step 3). The compounds (IV) and JP98 / 04373 NMR measurement data demonstrating maleic acid derivative intermediate (II) shown in Fig. 4 and maleic acid derivative shown in Fig. 5A (measured using Hitachi, Ltd., R-24 (60MHz)) } Is shown below.

(a) Compound obtained in step 1

^{_{J H NMR (60MHz CDCl: i}} ) 52.00- 2.90 (m, 2H -CIkCF 2 CF 2 -), 4.26-4.60 (t, 2H - COOCH2-), 6.28 (s, 2H -CH = CH-), 10.3 ( s, H -C00H)

(b) Compound obtained in step 2

^J H NMR (60MHz CDCh) 52.00-2.90 (m, 2H -CikCF ₂ CF _2- ), 3.26 (s, 3H -OCH3), 3.50 (s, 4H -0CikCik0CH ₃ ), 3.58 (s, 4H-0 „- ), 3.65-3.95 (m, 2H -C00CH ₂ ¾0-), 4.20- 4.60 (m, 4H-COOQk-), 6.20 (s, 2H -CH = CH-)

(c) Compound obtained in step 3

^{_{J H NMR (60MHz CDCl; i}} ) 52.00- 2.90 (m, 12H -CH2CF2CF2-, -OOCCikCH-, -SCH2-, 3.26 (s, 6H -OCik), 3.30- 3.45 (m, 6H -CikNH-), 3.50 (s, 8H -OCikCikOCH ₃ ), 3.58 (s, 8H -OCIkCIkO-), 3.65-4.60 (m, 14H -COOCH2.-,-C00CH ₂ Cik0-, 00CCH ₂ Example 2

The amount of maleic anhydride and 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluo-1-octanol used was 3.000 g (30.59 ol) And 11.139 g (30.59 liters), and a compound corresponding to the compound (IV) was obtained in the same manner as in Step 1 of Example 1 except that the reflux condition in the former stage was set at 115 ° C. for 3 hours.

Next, instead of triethylene glycol monomethyl ether, 5.680 g (16.23 ol) of polyethylene glycol methyl ether 350 (average molecular weight: 350, average degree of polymerization: 7.2) was used, and the standing time at low temperature was measured. A compound corresponding to the maleic acid-derived intermediate (II) was obtained in the same manner as in Step 2 of Example 1 except that the time was set to 10 minutes. C Subsequently, the maleic acid-derived intermediate (II) was added to cis-amine dihydrochloride. The amounts of salt, sodium bicarbonate, and THF used were 1.499 g (1.89 mmol) s and 0.234 g (1,04 mmol), respectively. The maleic acid derivative shown in FIG. 5B was obtained in the same manner as in Step 3 of Example 1 except that the amount was 0.285 g (3.39 recommended ol), 5 ml, and the reflux conditions were 73 ° C. and 5 ° C. for 73 hours.

It is demonstrated that the compounds obtained in each step of this example are a compound corresponding to compound (IV), a compound corresponding to maleic acid-derived intermediate (II), and a maleic acid derivative shown in FIG. 5B, respectively. The NMR measurement data {measured using Hitachi Ltd., R-24 (60 MHz)} is shown below.

(a) Compound obtained in step 1

^{_{! H NMR (60MHz CDC1 3)}} (52.00-2.90 (m, 2H -CikCF 2 CF 2 -), 4.26- 4.60 (t, 2H - COOCik-), 6.28 (s, 2H -CH = CH-), 10.3 ( s, H -C00H)

(b) Compound obtained in step 2

Ή NMR (60MHz CDC1 ₃ ) ^ 2.00-2.90 (m, 2H -CfkCF ₂ CF _2- ), 3.26 (s, 3H -0¾), 3.50 (s, 4H-0 „CH ₃ ), 3.58 (s, 21H- OCikCH ^ O-), 3.65-3.95 (m, 2H-C00C H2CH2O-), 4.20- 4.60 (m, 4H -COOCik-), 6.20 (s, 2H -CH = CH-)

(c) Compound obtained in step 3

_{Ή NMR (60MHz CDC1 3) 52.00-} 2.90 (m, 12H - CikCF 2 CF 2 -, -OOCCK CH-, -SCH2-, 3.26 (s, 6H - 0¾), 3.30-3.45 (m, 6H -WH-) , 3.50 (s, 8H -0¾¾0ϋΗ ₃ ), 3.58 (s, 42H -OCikCikO-), 3.65-4.60 (m, 14H -COOCH2-,-C00CH ₂ Cik0—, OOCCH

2 Cg-).

Example 3

3,3,4,4,5,5,6,6,7,7,8,8,8-Tridecafluo- 1-octanol Instead of 1.9 93 g (15.30 mmol) of 1-octane With the exception that the amount of maleic anhydride used was 1.500 g (5.30 liters), the reflux conditions in the first stage were 4 hours at 90 ° C, and the reflux conditions in the second stage were 0.5 hours at 75 ° C. In the same manner as in Step 1 of Example 1, a compound corresponding to compound (IV) was obtained.

Next, compound (IV) obtained in Step 1, triethylene glycol monomethyl ether, 4-dimethylaminopyridine, and dicyclohexylcarbodiimide Were used as 4.124 g (18.07 tmol), 4.449 g (27.10 mmol), 1.766 g (14.46 mmol), and 4.475 g (21.69 tmol), respectively, and the standing time at room temperature was 15 hours. Except for the above, a compound corresponding to the maleic acid-derived intermediate (II) was obtained in the same manner as in Step 2 of Example 1.

Subsequently, the amounts of the maleic acid-derived intermediate (II), cisamine dihydrochloride, sodium bicarbonate, and THF were changed to 1.001 g (2.67 mmol), 0.365 g (1.62 mmol) _s 0.412 g ( 4.90 mmol), and 5 ml, and the maleic acid derivative shown in FIG. 5C was obtained in the same manner as in step 3 of Example 1 except that the reflux condition was set at 60 ° C. for 45 hours.

It is demonstrated that the compounds obtained in each step of this example are a compound corresponding to compound (IV), a compound corresponding to maleic acid-derived intermediate (II), and a maleic acid derivative shown in FIG. 5C, respectively. The NMR measurement data {measured using Hitachi Ltd., R-24 (60 MHz)} is shown below.

(a) Compound obtained in step 1

^{_{! H NMR (60MHz CDC1 3)}} 50.61-1.86 (m, 15H -C ^ r, - Cik), 4.04-4.42 (t, 2H -COOCik -), 6.40 (s, 2H -CH = CH-), 10.3 ( s, H -C00H)

(b) Compound obtained in step 2

^{_{J H NMR (60MHz CDC1 3)}} δ 0,61-1.86 (m, 15H -CH ^ CIkCik-, 3.20 (s, 3H - OCiLi), 3.45 (s, 4H -OCH2CH2OCH3), 3.50 (s, 4H -OCH2CH2O- ), 3.65- 3.75 (m, 2H -C00CH ₂ y)-), 3.86-4.28 (m, 4H-COOQk-), 6.12 (s, 2H -CH = CH-)

(c) Compound obtained in step 3

Ή NMR (60MHz CDC1 ₃ ) δ 0.61-1.86 (m, 30H-Ci ^ CikCik—, — C | k), 2.10-2.3 6 (m, 4H -OOCCIkCH-), 2.48-3.00 (m, 4H -SCH2- ), 3.26 (s, 6H -OCH3), 3.30-3.45 (m, 6H -CM-), 3.45 (s, 8H -0¾¾00Η _{; ί} ), 3.50 (s, 8H -OCikCikO-), 3.6 5-4.33 (m, 14H -COOCH2-, -C00CH ₂ Cik0-, 00CCH ₂ CH-) _o

Example 4

Maleic anhydride and 3,3,4,4,5,5,6,6,7,7,8,8,8_tridecafluo-;!-, A compound corresponding to the compound (IV) shown in FIG. 1 was obtained in the same manner as in Step 1 of Example 1 except that the amount of the knol used was 4.040 g (41.20 sol) and 15.00 g (41.20 sol). . Next, instead of triethylene glycol monomethyl ether, 1.275 g (9.790 ol) of toluene was used, and the compound (IV) obtained in Step 1, 4-dimethylaminopyridine, dicyclohexylcarbodiimidide was used. , And dry dichloromethane were 3.002 g (6.496 t ol), 0.635 g (5.198 sol ol), 1.608 g (7.793 mmol) and 10 ml, respectively, except that the low-temperature storage time was 10 minutes. In the same manner as in Step 2 of 1, a compound corresponding to the maleic acid-derived intermediate (II) shown in FIG. 1 was obtained. Subsequently, the amounts of the maleic acid-derived intermediate (11), cisamine dihydrochloride, sodium bicarbonate, and THF were changed to 1.345 g (2.342 rec.ol), 0.2900 g (1.288 mmol), and 0.354 g (4.214 mmol, respectively). The maleic acid derivative shown in FIG. 5D was obtained in the same manner as in Step 3 of Example 1 except that the thigh ol), and 7 ml, and the reflux condition was 86 hours.

The compound obtained in each step of the present example was a compound corresponding to the compound (IV) shown in FIG. 1, a compound corresponding to the maleic acid-derived intermediate (Π) of the present invention shown in FIG. 1, and FIG. The following shows the NMR measurement data {measured using Hitachi, Ltd., R-24 (60 MHz)}, which demonstrates the maleic acid derivative of the present invention.

(a) Compound obtained in step 1

^! H NMR (60MHz CDC) 52.00-2.90 (m, 2H-C | kCF ₂ CF _2- ), 4.26-4.60 (t, 2H-COOCik-), 6.28 (s, 2H -CH = CH-), 10.3 ( s, H -C00H)

(b) Compound obtained in step 2

^! H NMR (60MHz CDC1 _{; 1} ) dO.64-2.00 (m, 15H -CH ^ CikCik ", -¾), 2.10-3.01 (ffl, 2H-QkCF ₂ CF _2- ), 3.28-5.73 (m, 4H -COOQk—), 7.93 (s, 2H -CH = CH-)

(c) Compound obtained in step 3

'Η NMR (60MHz CDCh) 50.64-2.00 (m, 30H-CikCikCik—, — Cik), 2.10-3.01 (m, 12H -CH2CF2CF2-, -SCik-, -OOCCH2CH-), 3.18-5.63 (m, 16H- COOCH -, one _{_{0 0CCH 2 CH-, - CH 2}} NH -). , (Wettability test) Wettability test of self-assembled monolayer

As the base material of the image forming body used for the printing plate, three base materials obtained by vacuum-depositing a gold film (thickness: 100 nm) on a SUS plate were used. After the surface of the gold film of the base material was heated and washed at 300 ° C. for 60 minutes, the maleic acid derivative (0.0) shown in FIGS. 5A to 5D obtained in Examples 1 to 4 was obtained. When the surface of the gold film of the base material was immersed in a dry tetrahydrofuran solution (20 ml) in which 2 mm o 1) was dissolved, as shown in FIG. 6A to FIG. The maleic acid derivative was almost uniformly adsorbed on the gold film surface to form a self-assembled monolayer. Then, the surface of the gold film on which the self-assembled monomolecular film was formed was dried by blowing hot air from a fan.

The self-assembled monolayer formed on the surface of the gold film in this manner was first placed in steam at 80 ° C in Example 1 and in an atmosphere of a mixed solution of water and ethanol at 70 ° C in Example 2. In Example 3, after heating in 95 ° C steam, and in Example 4, in a 60 ° C water / methanol mixed solution atmosphere, the contact angle with double-distilled water was measured using a contact angle measuring instrument (Kyowa Interface Science). CA-A) Table 1 shows the results.

Next, the self-assembled monomolecular film formed on the gold film surface was heated at 160 ° C. in dry air in Example 1, 160 ° C. in dry air in Example 2, and After heating to 180 ° C. in dry air and to 160 ° C. in dry air in Example 4, the contact angle of the heated gold film surface was measured in the same manner as described above. Table 1 shows the results.

Further, the self-assembled monomolecular film formed on the surface of the gold film was re-exposed in steam at 95 ° C in Example 1, and again in an atmosphere of a mixed solution of water and ethanol at 70 ° C. in Example 2. After heating again in steam at 95 ° C in Example 3 and again in an atmosphere of a mixed solution of water and methanol at 60 ° C in Example 4, the contact angle of the gold film surface after heating was the same as above. Measured. Table 1 shows the results. table 1

As is evident from the results shown in Table 1, heating in an atmosphere in the absence of a polar solvent increases the contact angle, and the surface of the self-assembled monolayer becomes more hydrophilic from water-repellent or more water-repellent. It was confirmed that it changed to strong water repellency. In addition, it was confirmed that the contact angle was reduced by the subsequent heating in the polar solvent presence atmosphere, and the surface of the self-assembled monolayer changed from water-repellent to hydrophilic or from strong to slightly weak. Was done. Further, heating in an atmosphere without polar solvent and heating in an atmosphere with polar solvent were repeated, but the reversible change in the contact angle was maintained.

Industrial applicability

As described above, in the image forming apparatus, the image forming method, and the plate making method of the present invention, the image forming body has the first chain portion and the second chain portion having different wettabilities from each other. Utilizing a self-assembled monolayer composed of a self-assembled compound whose surface wettability can be partially changed by heating at least a part of the self-assembled monolayer in a specific atmosphere I have. Therefore, it is possible to reversibly change the wettability of the surface of the self-assembled monolayer without desorbing the self-assembled monolayer itself from the substrate surface, and efficiently use the printing plate for the image forming body. And it can be created with good reproducibility.

In the present invention, the same printing plate can be used repeatedly. Therefore, the formation of a latent image for each sheet, which is required in a conventional electrophotographic printing machine, is not required, and high-speed printing is possible.

Further, in the present invention, the same image forming body can be repeatedly used for a plurality of images, so that the stencil printing and the new stencil winding required for the conventional stencil printing machine are required. Such complicated devices and processes are not required, and high-speed image formation can be performed with a small and simple device, and low running cost can be realized when printing a small number of copies on the same original. Furthermore, according to the present invention, it is not necessary to discharge the printing plate, so that waste can be reduced. Further, since the image forming body according to the present invention is formed of a self-assembled monomolecular film, a plate is formed by controlling the state (morphology) of each molecule. Therefore, according to the present invention, the edge characteristics of the plate are improved, and a high-resolution image printing plate can be formed. As a result, high-resolution printing can be performed.

Claims

The scope of the claims

1. Self-assembly having a base material and a first chain part and a second chain part which are adsorbed on the surface of the base material to form a self-assembled monomolecular film and have mutually different wettability. An image forming body comprising: a compound;

A transfer device for transferring ink attached to the surface of the image forming body onto a recording medium.

2. The first chain portion is a group selected from the group consisting of an alkyl group having water repellency and lipophilicity and a halogen-substituted alkyl group having water repellency and oil repellency,

The second chain portion is a group selected from the group consisting of a polyethylene glycol residue having hydrophilicity and lipophilicity and a polyethylene glycol monomethyl ether residue having lipophilicity and lipophilicity;

The first specific atmosphere is a polar solvent presence atmosphere, and the heating temperature in the atmosphere is 50 to: L 0 ° C;

The second specific atmosphere is a polar solvent-free atmosphere, and in the atmosphere, The heating temperature is 100 to 200 ° C,

The first surface is a water-repellent surface and the second surface is a hydrophilic surface,

The image forming apparatus according to claim 1, wherein:

3. The first chain portion is a halogen-substituted alkyl group having stronger water repellency and oil repellency,

The second chain portion is an alkyl group having weaker water repellency and lipophilicity, the first specific atmosphere is a polar solvent presence atmosphere, and the heating temperature in the atmosphere is 50 to: L 0 0 ° C,

The second specific atmosphere is a polar solvent-free atmosphere, and the heating temperature in the atmosphere is 100 to 200 ° C.,

The first surface is a stronger water-repellent surface and the second surface is a weaker water-repellent surface;

The image forming apparatus according to claim 1, wherein:

4. The self-assembling compound has the following general formula (I)

(I)

[In the formula (I), ^one of R ¹ and R ^{2 represents} a group selected from the group consisting of an alkyl group having 3 to 22 carbon atoms and a halogen-substituted alkyl group having 3 to 22 carbon atoms. And the other of R ¹ and R ² is a polyethylene glycol residue having a repeating unit of 1 to 10, a polyethylene glycol monomethyl ether residue having a repeating unit of 1 to 10, and a halogen having 3 to 22 carbon atoms. A group selected from the group consisting of substituted alkyl groups, provided that R ¹ and R ² are not the same, and R ³ and R ⁴ may be the same or different and each have 1 to 22 carbon atoms. Represents an alkyleneimino group]

The image forming apparatus according to any one of claims 1 to 3, wherein the image forming apparatus is a maleic acid derivative represented by the following formula:

5. A film forming apparatus for supplying the self-assembling compound to the surface of the base material and forming a self-assembled monomolecular film on the surface of the base material, further comprising a film forming apparatus. The image forming apparatus according to claim 1.

6. Self-assembly property having a base material and a first chain part and a second chain part adsorbed on the surface of the base material to form a self-assembled monomolecular film and having mutually different wettability. A self-assembled monomolecular film forming the self-assembled monomolecular film in a first specific atmosphere, thereby giving priority to the surface characteristics of the self-assembled monomolecular film. The first influence is that the state of the first and second chains is changed from the state of the first and second chains to the state of the second chains to uniform the wettability of the surface of the image forming body. Heating process,

By partially heating the self-assembled monolayer forming the self-assembled monolayer in the second specific atmosphere, the surface properties of the self-assembled monolayer are preferentially affected. Changing the state of the second chain portion to the state of the first chain portion, and providing a first surface and a second surface having different wettabilities on the surface of the image forming body. 2, heating step,

A developing step of supplying an ink that preferentially adheres to either the first surface or the second surface on the surface of the image forming body; and A transfer step of transferring the ink attached to the surface of the image forming body to a recording medium.

7. The first chain portion is a group selected from the group consisting of an alkyl group having water repellency and lipophilicity and a halogen-substituted alkyl group having water repellency and oil repellency,

The second chain portion is a group selected from the group consisting of a polyethylene glycol residue having hydrophilicity and lipophilicity and a polyethylene glycol monomethyl ether residue having lipophilicity and lipophilicity,

The first specific atmosphere is a polar solvent presence atmosphere, and the heating temperature in the atmosphere is 50 to 100 ° C.,

The image forming method according to claim 6, wherein:

8. The first chain portion is a halogen-substituted alkyl group exhibiting stronger water / water repellency,

The second chain part is an alkyl group that is weaker water-repellent. The parent atmosphere is a polar solvent, and the heating temperature in the atmosphere is the presence of a polar solvent. Is 50 ~: 100 ° C,

The image forming method according to claim 6, wherein:

9. The self-assembling compound has the following general formula (I) (I)

Two

[In the formula (I), ^one of R ¹ and R ^{2 represents} a group selected from the group consisting of an alkyl group having 3 to 22 carbon atoms and a halogen-substituted alkyl group having 3 to 22 carbon atoms, The other of R ¹ and R ^{2 is} a group consisting of a polyethylene glycol residue having 1 to 10 repeating units, a polyethylene glycol monomethyl ether residue having 1 to 10 repeating units, and a halogen-substituted alkyl group having 3 to 22 carbon atoms. Represents a selected group, provided that R ¹ and R ² are not the same, and R ^{: i} and R ′ may be the same or different and each represent an alkyleneimino group having 1 to 22 carbon atoms.

The image forming method according to any one of claims 6 to 8, which is a maleic acid derivative represented by the following formula:

10. The method further comprises the step of supplying the ili self-compounding compound to the base of the base material and forming and removing a self-bonding il molecular chain in the base of the base material.画像 The image forming method described in any one of 6-9.

11. Self-adhesion to the base material and self-bonding between the first chain part and the second chain part, which form a self-bonded molecule and have different wettability. An image forming body comprising: a self-forming monomolecular film; By heating the compound in the first specific atmosphere, the surface characteristics of the self-assembled monolayer are preferentially influenced by the state of the first and second chain portions. A first heating step of changing the state of the image forming body to a uniform state, thereby making the surface of the image forming body uniform in wettability;

A plate-making method comprising:

12. The first chain portion is a group selected from the group consisting of an alkyl group having water repellency and lipophilicity and a halogen-substituted alkyl group having water repellency and oil repellency,

The plate making method according to claim 11, characterized in that:

13. The first chain portion is a halogen-substituted alkyl group having stronger water repellency and oil repellency,

The second chain portion is an alkyl group having weaker water repellency and lipophilicity, the first specific atmosphere is an atmosphere containing a polar solvent, and the heating temperature in the atmosphere is 50 to 10: 0 ° C, and The second specific atmosphere is a polar solvent-free atmosphere, and the heating temperature in the atmosphere is 100 to 200 ° C;

The plate making method according to claim 11, characterized in that:

14. The self-assembling compound has the following general formula (I)

(I)

3 5

[In the formula (I), ^one of R ¹ and R ² represents される selected from ^ consisting of an alkyl group having 3 to 22 carbon atoms and a halogen-substituted alkyl S having 3 to 22 carbon atoms. The other of R ¹ and R ² is a repeat ii ¹ .a polyethylene glycol residue at position 1 to 10, a repeat i′l is a polyethylene glycol monomethyl ether residue having 1 to 10 and a carbon number of 3 to 22. And R ¹ and R ² are not the same, and R ¹ may be the same or different and each has 1 to 22 carbon atoms. Represents an alkyleneimino group]

Claims 1 to 1 and 3 characterized in that it is a maleic acid derivative that is combined with The plate-making method according to any one of the above.

15. The method according to claim 11, further comprising a step of supplying the self-assembling compound to the surface of the base material, and forming a self-assembled monomolecular film on the surface of the base material. The plate-making method according to any one of the above.