JP4929793B2 - Manufacturing method of printed matter - Google Patents

Description

  The present invention relates to a method for producing a printed matter in which a high-definition pattern is formed on a flexible substrate such as a plastic film, in particular, a long plastic film with high production efficiency. Examples of the printed material include color filters for liquid crystal display devices, organic EL elements, circuit base materials, thin film transistors, microlenses, biochips, and the like.

  In recent years, flat panel displays have been used as image display devices for various applications such as stationary, wall-mounted, and portable types in terms of energy saving, space saving, and portability. In particular, in the portable type, there is a demand for plasticization from the viewpoints of impact resistance that does not break even when dropped during carrying, weight reduction, thinness, and the like. In addition, the wall-hanging type also has a demand for a flexible display from the viewpoint of installing the display on a columnar column.

  However, all conventional flat panel displays are manufactured on a glass substrate, and it is difficult to manufacture on a plastic substrate. That is, the production of a conventional flat panel display member includes a photolithography process and a heating process at a high temperature. For example, in the production of a color filter for a liquid crystal display, there are steps such as development, washing, baking, etc., in patterning the photosensitive resin, and the plastic substrate is damaged or stretched. Moreover, in the manufacturing process of the thin film transistor which is a drive electrode of the display, the formation of the silicon semiconductor and the insulating film includes a high temperature process of 300 ° C. or more, which exceeds the heat resistance of the plastic substrate. Furthermore, the photolithographic process is a process in which film formation, exposure, development, and peeling are performed for each material, and the manufacturing equipment becomes large, and there are significant problems in terms of manufacturing costs.

  Because of these problems, a printing method capable of precise patterning on plastic has been demanded. Therefore, one of printing methods is a screen printing method. The screen printing method has been put to practical use in printing of wirings, resistors and dielectrics in electronic parts. However, because of stencil printing, the ink is limited to paste-like high-viscosity, and even if it can be used as a printing method for thick films of about several tens of μm due to the fineness of the screen mesh, patterning around 10 μm The law cannot be adopted.

  As another method, an ink jet method has been studied. The ink-jet method is expected as the simplest patterning method because a predetermined material can be patterned only in a predetermined portion, so that the use efficiency of the material is high and a plate is not used. However, the diameter of ink droplets of the current ink jet is about several tens of μm, and the landing accuracy is about several tens of μm. In particular, in the case of linear patterning, since a plurality of ink droplets are ejected linearly from a nozzle, when viewed microscopically, circular ink droplets are continuous and inferior in linearity. Due to these characteristics, for precise patterning, it is necessary to previously form partition walls and the like on the substrate by a photolithography process. Therefore, it cannot be adopted as a patterning method of about 10 μm such as a black matrix of a color filter or wiring of a printing type thin film transistor.

  On the other hand, in recent years, a new printing method has been developed as a printing substrate using a glass substrate. That is, a printing material having a predetermined thickness is applied to the upper surface of the transfer flat plate member, the printing plate is pressed against the transfer flat plate member to transfer the printing material to the printing plate side, and the printing plate is printed In the printing method in which the printing material transferred onto the printing plate by being pressed against the glass substrate is transferred to the glass substrate side, thereby forming a printed film on the glass substrate, the transfer flat plate member There is a printing apparatus composed of a glass substrate having an etching pattern with a predetermined depth on the surface (see, for example, Patent Document 1).

  However, in the above printing method, it is difficult to apply to a plastic film as a substrate to be printed, particularly a long plastic film with high production efficiency, and a glass substrate whose surface is a flat plate for transfer is etched, There is a problem that the reproducibility of the high-definition pattern becomes unstable because the ink wettability of the glass substrate is good and the transferability (film thickness) of the ink to the printing plate becomes unstable. In addition, when a glass substrate is used, application to a roll-to-roll printing apparatus is also impossible.

  Furthermore, a new printing method called a reverse printing method has been developed. That is, an ink liquid film is formed on a blanket provided on a cylinder, and after preliminary drying, an ink image pattern is left on the blanket with a glass plate on which a non-image pattern is formed, and then the ink on the blanket is used as a substrate. This is a printing method in which the image is transferred to the top (for example, see Patent Document 2). In this method, it is easy to adjust the ink film thickness by preparing an ink liquid film in advance, and since the image pattern is formed on the ink-peeling blanket, the ink transfer to the substrate is good. It has characteristics such as. In addition, since the preliminary drying is performed, a fine pattern can be formed with a thin film.

  However, this printing method has a problem that the ink wettability and transferability on the blanket surface become unstable because the ink is pre-dried on a blanket made of silicone rubber or silicone resin.

The above prior art documents are shown below.
JP-A-5-138860 JP 2001-56405 A

  The present invention solves the problems of the prior art, and the object of the present invention is to apply to a flexible base material such as a plastic film, in particular, a long flexible base material excellent in production efficiency. An object of the present invention is to provide a method for producing a printed material that is possible and has excellent reproducibility of a high-definition pattern. Another object of the present invention is to provide a method for producing a printed matter that can be continuously printed by a roll-to-roll method.

In order to achieve the above object in the present invention, first, the invention of claim 1 is a method for producing a printed matter in which an image pattern made of ink is printed on a flexible substrate, and an SiO ₂ film is formed on the surface. A step of irradiating the formed cylinder with ultraviolet light, a step of forming an ink liquid film on the cylinder, and a rotatable relief printing plate having a non-image pattern on the cylinder is pressed against the ink liquid film on the cylinder A step of transferring and removing the ink liquid film corresponding to the non-image pattern to the convex portions of the relief printing plate by rotating, and a step of transferring and printing the ink liquid film remaining on the cylinder onto the flexible substrate; This is a method for producing a printed matter.

The invention of claim 2 has a step of removing the ink liquid film on the convex portion of the relief plate after the step of transferring and removing the ink liquid film corresponding to the non-image pattern to the convex portion of the relief plate. The printed matter manufacturing method according to claim 1 , wherein:

The invention of claim 3 is a method for producing a printed matter in which an image pattern made of ink is printed on a flexible substrate, and the step of irradiating ultraviolet rays onto a cylinder having a SiO ₂ film formed on the surface; An ink liquid film corresponding to the image pattern is formed by forming a liquid film on the cylinder and rotating and rotating a relief relief plate whose convex part pattern is an image pattern against the ink liquid film on the cylinder. It is a method for producing a printed matter, comprising a step of transferring to a convex portion of the relief plate and a step of transferring and printing an ink liquid film on the convex portion of the relief plate onto a flexible substrate. .

Further, the invention of claim 4 is characterized in that after the step of transferring the ink liquid film on the cylinder to the convex portion of the relief plate, there is a step of removing unnecessary ink liquid film remaining on the cylinder. The method for producing a printed matter according to claim 3 .

The invention according to claim 5 is the method for producing a printed matter according to any one of claims 1 to 4 , wherein an ink receiving layer is laminated on a printing surface of the flexible substrate. It is.

  Since this invention is the above structure, there exist the following effects.

According to the first and third aspects of the invention, the cylinder surface can be cleaned by irradiating the cylinder having the SiO ₂ film formed on the surface with ultraviolet rays, and the ink liquid film can be peeled off from the cylinder. Can be improved uniformly. And it can be set as the manufacturing method of the printed matter stable also in reproducibility while enabling the high-definition pattern printing to a flexible base material, especially a elongate flexible base material.

According to the second aspect of the invention, after the step of transferring and removing the unnecessary ink liquid film to the convex portion of the relief plate, the step of removing the ink liquid film on the convex portion of the relief plate, When printing continuously one after another, a pattern consisting of only a new ink liquid film (no old ink liquid film left in the previous transfer removal process) to be a non-image part is formed on the convex part of the relief printing plate. Therefore, it is possible to obtain a printed material that is superior in the reproducibility of the high-definition pattern. This is because, if the old ink liquid film up to the previous time remains, it gradually accumulates on the convex portions of the letterpress and makes the reproducibility of printing unstable.

According to the fourth aspect of the present invention, after the step of transferring the ink liquid film on the cylinder to the convex portion of the relief plate, the step of removing the unnecessary ink liquid film remaining on the cylinder, When printing continuously one after another, only new ink liquid film (without the pre-dried old ink liquid film remaining in the previous printing) is formed on the cylinder, so reproducibility of high-definition patterns A more excellent printed material can be obtained. This is because if an old ink liquid film is left up to the previous time, it gradually accumulates on the cylinder and makes the reproducibility of printing unstable.

According to the invention of claim 5 , the ink receiving layer is laminated on the printing surface of the flexible base material, so that the transfer of the ink liquid film to the flexible base material is the ink receiving property. An ink-receiving layer excellent in the quality can be obtained, and a printed matter in which the resulting high-definition pattern on the flexible substrate has excellent reproducibility can be obtained.

  Therefore, the present invention was able to stably perform thin film printing of a high-definition pattern on a flexible substrate such as a plastic film, particularly a long flexible substrate. The color pattern, black matrix, white matrix, spacer, and the like of the color filter can be produced by the production method of the present invention. Further, a solution type semiconductor pattern such as a gate electrode, a source / drain electrode, a gate insulating film, and an organic semiconductor material of a printing transistor can be manufactured by this manufacturing method. Furthermore, the patterning of the light emitting layer of the polymer organic EL can be efficiently produced by the production method of the present invention.

  The printing method of the present invention is the same up to the step of preparing an ink liquid film on the cylinder, predrying the ink liquid film, and transferring the ink liquid film on the cylinder to the convex part of the rotatable relief printing plate. However, the subsequent transfer process is two different printing methods. The preliminarily dried ink liquid film is transferred to and removed from the convex portion of the relief printing plate by pressing and rotating the convex portion of the relief printing plate having a non-image pattern against the predried ink liquid film, and the transfer removing step. After that, the printing method (reversal printing method) for transferring the image pattern of the ink liquid film remaining on the cylinder to the flexible substrate, and pressing the convex portion of the relief printing plate having the image pattern on the pre-dried ink liquid film This is a printing method (flexographic printing method) in which the preliminarily dried ink liquid film is transferred to the convex portions of the relief plate, and the ink liquid film transferred to the convex portions of the relief plate is transferred to a flexible substrate. Furthermore, since it is important to selectively transfer the ink liquid film uniformly applied onto the cylinder to the flexible substrate, a method for stably forming an ink peelable surface on the cylinder is provided. The best mode for carrying out these will be specifically described below.

(First embodiment)
The printing method according to the present embodiment produces an ink liquid film on a cylinder, presses the convex part of the relief plate having a non-image pattern against the ink liquid film, and transfers and removes the ink liquid film to the convex part of the relief plate. The image pattern of the ink liquid film remaining on the cylinder after the transfer removing step is transferred to a flexible substrate. An example of the printing method of this embodiment will be described with reference to FIG.

  The material of the cylinder can be generally made of metal, but the type of metal material is not particularly limited. Preferably, aluminum, iron, zinc, tin, titanium, copper, magnesium and their alloys, steel, and stainless steel are used. In addition, other materials than metals such as ceramics, silicon, and glass may be used, but there are limitations due to mechanical strength and manufacturing problems. In addition, a film of a non-metallic material such as ceramics or glass may be coated on the surface of a metal cylinder by a known means such as a vacuum film formation method typified by sputtering or vapor deposition or enamel.

  The cylinder used in the present invention may have an ink peelable surface 2 on the cylinder surface for the purpose of improving the ink peelability. Although the surface property of the cylinder surface varies depending on the material, in general, when the surface energy is large, various inks are likely to get wet, but conversely, ink separation in the subsequent process becomes poor. Therefore, an ink peelable surface 2 is formed on the cylinder 1 according to the ink used for printing. A method for forming the ink peelable surface 2 on the cylinder 1 will be described. (Fig. 1 (a))

As the material of the ink releasable surface 2, a silicone resin, which is a blanket material used in normal offset printing, can be used. However, the uniformity of the thickness during molding is maintained, and the ink component permeates during use. Other configurations are provided to eliminate the impact. One of them is a clean SiO ₂ film. The SiO ₂ film includes virtually the same case as the above-described coating of a nonmetallic material such as glass, but a thin film of 0.1 to several μm is sufficient as the ink peelable surface 2. In order to maintain suitable ink releasability, it is not sufficient that the cylinder surface is simply covered with a SiO ₂ film, and it is effective to perform cleaning by ultraviolet irradiation immediately before ink coating. It is.

  Specifically, an ink peelable refresh surface 20 is obtained by operating an ink peelable refresh surface forming unit (in this case, an ultraviolet lamp) 19 prior to the ink coating unit 21. The wavelength and intensity of ultraviolet light may be set according to the arrangement of units, processing time, and the properties of the target ink, but it has a short wavelength (wavelength 240 nm or less) function that has the ability to absorb ozone in the air and generate ozone. Affect.

  A silane coupling agent can also be used as the material of the ink releasable surface 2. In order to make the effect more stable, the application of the silane coupling agent to the cylinder 1 is performed in the same meaning as the ultraviolet lamp described above, and the unit for forming an ink-peeling refresh surface (here, the application of the silane coupling agent) The drying unit 19 is operated prior to the ink coating unit 21. Although it is not necessary to carry out every time before ink coating, it is appropriately operated depending on the state of the ink or the like in order to stabilize the most important peelability.

  Examples of the silane coupling agent include trimethoxysilanes and triethoxysilanes that can react with general glass and metal. As one site of the silane coupling agent, a reactive group with an organic compound such as a vinyl group, an epoxy group, an amino group, a methacryl group, or a mercapto group can be selected. Alternatively, an alkyl group, a group in which a part of the fluorine atom is substituted, or a group in which a substituent capable of forming a surface with a small surface energy by bonding with siloxane can be selected. When the former silane coupling agent having a reactive group is used, after treating the surface of the cylinder with the silane coupling agent, another monomer component is applied and bonded so as to have a predetermined surface free energy. Also good.

  Examples of the silane coupling agent having a reactive group include vinyl methoxy silane, vinyl ethoxy silane, p-styryl trimethoxy silane, 3-glycidoxy propyl trimethoxy silane, 2- (3,4 epoxy cyclohexyl) ethyl trimethoxy silane. , 3-methacryloxypropylmethyldiethoxysilane, 3-acryloxypropyltrimethoxysilane, etc., and monomers include styrene, ethylene glycol diglycidyl ether, trimethylpropane triglycidyl ether, lauryl acrylate, dipentaerythritol Hexaacrylate or the like can be used.

  As the silane coupling agent having no reactive group, methyltrimethoxysilane, n-hexyltrimethoxysilane, n-octyltrimethoxysilane, dodecyltrimethoxysilane, or the like can be used. However, it is not limited to an alkyl group. As a result, the ink-peelable surface 2 having a molecular level film thickness can be produced, and the ink component does not substantially permeate, or can reach a saturated state instantaneously, and stable printing can be performed. .

As a method for fixing the silane coupling agent to the cylinder 1, a known metal or glass surface treatment method using a silane coupling agent may be used. The silane coupling agent is hydrolyzed when it comes into contact with water to generate a silanol group. Silanol groups are polymerized by self-condensation and at the same time chemically bonded to OH groups on the metal surface by acid-base reaction. This principle can be used. For example, a solution obtained by diluting a silane coupling agent in water, acetic acid water, a water-alcohol mixed solution, or an alcohol solution is applied to a glass / metal surface using a roll coating method, an applicator method, and the like, and dried. The method can be used. When a silane coupling agent having a reactive group is used, other monomer components can then be applied and bonded in the same manner. Alternatively, a SiO ₂ film may be formed on the cylinder surface in advance by vapor deposition, CVD, sputtering, sol-gel, or the like to facilitate treatment with a silane coupling agent.

  The wettability of the ink peelable surface 2 is such that the contact angle when ink is dropped onto the ink peelable surface 2 is preferably 10 ° or more and 90 ° or less, and more preferably 20 ° or more and 70 ° or less. . If the contact angle is less than 20 °, the peelability of the ink liquid film 30 from the ink peelable surface 2 is lowered, and pattern defects (such as poor reproducibility) are likely to occur, and the contact angle is more than 70 °. If it is large, repelling occurs when forming the ink liquid film, and it becomes difficult to form a uniform ink liquid film.

  Next, an ink liquid film 30 is formed on the ink peelable surface 2. (Fig. 1 (b))

  As a material for the ink liquid film 30, various organic additives such as gold, silver, copper, nickel, platinum, palladium, rhodium, and other various additives may be added as necessary. Additions can be used. As the dispersion medium, water or alcohol can be used.

  As a method for producing the ink liquid film 30 on the ink releasable surface 2, a known coating method selected depending on the viscosity of the ink or the drying property of the solvent can be used. As a coating method, a die coating method, a cap coating method, a roll coating method and the like that can form a uniform ink liquid film with respect to an ink having a wide range of viscosity are suitable methods. The coating unit 21 in FIG. 1 shows a die coating method as an example, and will be described as a die coating method hereinafter, but is not limited thereto.

  Further, after the ink liquid film is formed on the ink peelable surface, preliminary drying may be performed on the ink liquid film. As a pre-drying method, a natural drying method, a cold air / hot air drying method, a microwave drying method, a radiation drying method such as an ultraviolet ray or an electron beam, and the like can be used.

  This preliminary drying is intended to increase the viscosity, thixotropy and brittleness of the ink liquid film 30 and does not completely dry the ink liquid film. If the drying is insufficient, the ink film is broken when the convex part of the relief printing in the subsequent process is pressed and peeled off. If the drying is excessive, the ink is transferred onto the relief 23. The liquid film 30 is not transferred. Therefore, the dry state is adjusted according to the composition of the ink used.

  Next, an unnecessary ink liquid film corresponding to the non-image pattern 33 is formed on the convex portion of the relief plate by rotating the relief relief plate 23 whose convex portion pattern is a non-image pattern against the ink fluid film 30 and rotating it. The image pattern 31 is formed on the ink peelable surface 2 by transferring and removing. (Fig. 1 (c))

  The relief plate 23 is made of a resin material such as nylon, acrylic, silicone resin, styrene-diene copolymer, and a resin for relief printing or flexographic printing made of a rubber material such as ethylene propylene, butyl, or urethane rubber. Can be used.

As a method for manufacturing the relief plate 23, a method of pouring a resin into a mold, a method of engraving, or the like can be used. Moreover, a highly accurate relief plate can be produced by forming a convex portion by a photolithography method using a photosensitive resin as a forming material. The relief plate 23 is mounted on a cylindrical plate cylinder 22 and used.

  Next, the image pattern 31 of the ink liquid film remaining on the ink-removable cylinder after the transfer removal step is pressed by the back roll 26 to transfer the print pattern 32 to the flexible substrate 5. Print. (Fig. 1 (d))

  The material of the flexible substrate 3 can be applied as long as it is not flexible, such as glass or plastic plate, but may be selected according to the drying temperature of the ink applied to printing. Polyethylene terephthalate, polyethylene naphthalate, polyether sulfone, cycloolefin polymer, polyimide, nylon, aramid, polycarbonate, polymethyl methacrylate, polyvinyl chloride, triacetyl cellulose, and other films and sheets can be used. Of these, heat-resistant polyethylene naphthalate, polyethersulfone, cycloolefin polymer, polyimide and the like are preferable.

  In addition, when the flexible substrate has sufficient flexibility and can be wound up, an image pattern made of ink is continuously printed on the flexible substrate by a roll-to-roll method. Is possible.

  Moreover, the base material which consists of material which added the inorganic filler to the said resin and improved heat resistance may be sufficient. The film and sheet may be stretched or unstretched. Further, the flexible substrate 3 may be laminated with a gas barrier layer, a smoothing layer, or a sliding layer on the printing surface or other surface as necessary.

An ink receiving layer may be formed on the flexible substrate 3.
Ink-receiving layer materials include polyvinyl alcohol, polyester resin, acrylic resin, methacrylic resin, acetal resin and other resin components, silica, alumina, calcium carbonate, silicate, calcium silicate, polystyrene and other filler components Or a material composed of an emulsion mainly composed of a urethane-based resin, gelatin, a hardener, or the like can be used.

  As a method for forming the ink receiving layer on the flexible substrate 3, a spin coating method, a die coating method, a cap coating method, a roll coating method, an applicator method, a spray coating method, a dispenser, or the like is used, followed by drying. The method can be used.

  In this embodiment, an example in which the non-image pattern 33 (residual ink) is removed from the relief plate 23 with an adhesive substrate will be described with reference to FIGS. A method of washing residual ink with a solvent may be used.

  First, the non-image pattern 33 on the relief plate 23 is brought into contact with the adhesive substrate 25. (Fig. 1 (d))

  As a material of the adhesive substrate 25, an adhesive sheet made of acrylic, olefin, polyurethane, silicone, synthetic rubber or the like can be used.

  As a method of bringing the non-image pattern 33 into contact with the adhesive substrate 25, a method of pressing the non-image pattern 33 on the adhesive substrate 25 with the residual ink removing roll 24 can be used.

  Finally, the non-image pattern 33 (residual ink) is removed from the relief plate 23 by separating the adhesive substrate 25 from the relief plate 23. (Fig. 1 (e))

  As a method of separating the adhesive substrate 25 from the relief plate 23, a method of rotating the residual ink removing roll 24 and separating it from the relief plate 23 can be used.

  Next, an example of the printing apparatus according to the present embodiment will be described with reference to FIG.

  The printing apparatus includes a coating unit 21, a relief plate 23, a plate cylinder 22 for fixing the relief plate 23, a residual ink removing roll 24, a back roll 26, an ink peelable refresh surface forming unit 19, and an ink peelable surface 2. Is provided. In addition, you may provide the coating apparatus for producing the ink peelable surface 2 on the surface of the cylinder 1 in addition to this. When this coating apparatus is provided, it is simple because it can be produced without removing the cylinder 1 when producing the ink peelable surface.

  The distance between the coating part 21 and the ink peelable surface 2 is set before the start of printing. Ink discharge is started from the coating portion, and the ink liquid film 30 is formed on the ink peelable surface 2.

  Although the ink peelable surface 2 is rotated in the direction of the plate cylinder 22, a dryer such as an oven, a hot air blower, a vacuum dryer, or an ultraviolet irradiator may be provided on the way.

  A relief plate 23 is fixed to the plate cylinder 22. The plate cylinder 22 may be provided with a mechanism for moving up and down in addition to the rotation mechanism.

  The plate cylinder 22 is rotated, and the non-image pattern 33 of the ink liquid film 30 in contact with the convex portion of the resin relief plate 23 fixed to the plate cylinder 22 is transferred to the convex portion of the relief plate 23.

  The flexible substrate 3 can come into contact with the image pattern 31 by the back roll 26. By the rotation of the back roll 26, the image pattern 31 formed on the ink peelable surface 2 is transferred onto the flexible substrate 3, and the print pattern 32 can be obtained.

  Next, an example of an apparatus for removing the non-image pattern 33 attached to the resin relief plate 23 will be described with reference to FIG.

  The residual ink removing roll 24 is in contact with the resin relief plate 23 via the adhesive substrate 25, and the non-image pattern 33 on the relief plate 23 is made of an adhesive tape or the like by the rotation of the residual ink removal roll 24. The non-image pattern 33 can be removed from the relief plate 23 by transferring to the conductive substrate 25.

(Second embodiment)
In the printing method according to the present embodiment, the convex portion of the relief plate having an image pattern is pressed against the ink liquid film on the cylinder and rotated to transfer the ink liquid film to the convex portion of the resin relief plate, and the relief plate The ink liquid film transferred to the convex portion is transferred to a flexible substrate. The rest is the same as the first embodiment.

  An example of the printing method of this embodiment will be described with reference to FIG. The same members as those in FIG.

  First, the ink releasable surface 2 is formed on the cylinder 1 as an ink releasable cylinder as in the process of FIG. (Fig. 2 (a))

  Next, an ink liquid film 30 is formed on the ink peelable surface 2. (Fig. 2 (b))

  Next, if necessary, the pre-dried ink liquid film 30 is transferred by bringing a relief plate 23 having a convex pattern as an image pattern into contact therewith, and the ink liquid film corresponding to the image pattern 31 is transferred onto the convex portion of the relief plate 23. Transcript. (Fig. 2 (c))

  Finally, the image pattern 31 formed on the convex portion of the relief plate 23 is pressed by the back roll 26 to be transferred to the flexible base material 3 and printed. (Fig. 2 (d))

  In the present embodiment, an example in which the non-image pattern 33 (residual ink) is removed from the ink peelable surface 2 will be described with reference to FIGS.

  First, the non-image pattern 33 on the ink peelable surface 2 is brought into contact with the adhesive substrate 25. (Fig. 2 (d))

  As a method of bringing the non-image pattern 33 into contact with the adhesive substrate 25, a method of pressing the non-image pattern 33 on the adhesive substrate 25 with the residual ink removing roll 24 can be used.

  Finally, the non-image pattern 33 (residual ink) is removed from the ink peelable surface 2 by separating the adhesive substrate 25 from the ink peelable surface 2. (Fig. 2 (e))

Next, an example of the printing apparatus according to the present embodiment will be described with reference to FIG.
The printing apparatus includes a coating unit 21, a relief plate 23, a plate cylinder 22 for fixing the relief plate 23, a residual ink removing roll 24, a back roll 26, an ink peelable refresh surface forming unit 19, and an ink peelable surface 2. Is provided.

  After the distance between the coating part 21 and the ink peelable surface 2 is set before printing is started, ink discharge is started from the coating part 21 to form the ink liquid film 30 on the ink peelable surface 2.

  The plate cylinder 22 is rotated, and the image pattern 31 of the ink liquid film 30 in contact with the convex portion of the relief plate 23 fixed to the plate cylinder 22 is transferred to the convex portion of the resin relief plate 23.

  The flexible substrate 3 is sandwiched between a relief plate 23 fixed to the plate cylinder 22 and a back roll 26 in contact therewith, and can contact the image pattern 31 by pressing the back roll 26. By the rotation of the back roll 26, the ink liquid film 31 formed on the convex portion of the relief plate 23 is transferred onto the flexible substrate 3 to obtain the printing pattern 32.

  Next, an example of an apparatus for removing the non-image pattern 33 attached to the ink peelable surface 2 will be described with reference to FIG.

  The residual ink removing back roll 24 can press the adhesive substrate 25 made of an adhesive tape or the like to the non-image pattern 33 on the ink peelable surface 2. By the rotation of the residual ink removing roll 24, the non-image pattern 33 on the ink peelable surface 2 is transferred onto the adhesive substrate 25, and the nonimage pattern 33 can be removed from the ink peelable surface 2. .

  Specific examples of the present invention will be described below.

  Printing was performed on a polyethylene naphthalate (PEN) substrate (manufactured by Teijin DuPont) using the red ink for the color filter in the manner of the printing process diagram shown in FIG.

The red ink for color filter was prepared as follows. First, a mixture having the following composition was stirred and mixed uniformly, then dispersed with a sand mill for 5 hours using glass beads having a diameter of 1 mm, and then filtered with a 5 μm mesh filter to prepare a red pigment dispersion.
・ C. I. Pigment Red 254 (Irga Four Red B-CFJ manufactured by Ciba Specialty Chemicals) --- 18 parts by weight C.I. I. Pigment Red 177 (Chromotar Red A2BJ, manufactured by Ciba Specialty Chemicals) --- 2 parts by weight, acrylic varnish (solid content 20%) --- 108 parts by weight

Next, the mixture having the following composition was stirred and mixed to be uniform, and then filtered through a 5 μm mesh filter to obtain a red ink for a color filter.
・ Dispersion of the above red pigment--100 parts by weight-Methylated methylol melamine: MW-30 (manufactured by Sanyo Kasei Co., Ltd.) --- 20 parts by weight-Leveling agent: Megafac F-484SF (Dainippon Ink Chemical Co., Ltd.) Manufactured) --- 1 part by weight, propylene glycol monomethyl ether --- 85 parts by weight, propylene glycol monomethyl ether acetate --- 45 parts by weight

The surface of the ink peeling cylinder was treated as follows. After depositing SiO ₂ on the stainless steel cylinder surface, it was immersed in a solution of n-hexyltrimethoxysilane dissolved in isopropyl alcohol and dried at 120 ° C. to form an ink peelable surface.

  Next, a red ink for color filter was applied on an ink-peeling cylinder by a die coating method, and then preliminarily dried at 25 ° C. to form a red ink liquid film for color filter.

  Next, the convex part of the flexographic plate (made by Toyobo Co., Ltd.) having a non-image pattern was brought into contact with the ink liquid film and then released to form an image pattern on the ink-peeling cylinder.

Finally, PEN (polyethylene naphthalate) (manufactured by Teijin DuPont) was brought into contact with the image pattern on the ink peelable cylinder to form an image pattern on the PEN substrate.

  Printing was performed on a polyethylene terephthalate (PET) substrate having an ink receiving layer laminated thereon using conductive ink in the manner of the printing process diagram shown in FIG.

The surface of the ink peeling cylinder was treated as follows. After depositing SiO ₂ on the stainless steel cylinder surface, it was immersed in a solution of dodecyltrimethoxysilane dissolved in isopropyl alcohol and dried at 120 ° C. to form an ink peelable surface.

  Next, a conductive ink composed of a silver particle aqueous dispersion (average particle size 20 nm) was applied on an ink-peeling cylinder by a die coating method, and then preliminarily dried at 60 ° C. to form an ink liquid film.

  Next, an image pattern was formed on the convex portion of the flexographic plate by releasing the convex portion of the flexographic plate (manufactured by Toyobo Co., Ltd.) having an image pattern after contacting the ink liquid film.

  Next, an acrylic water-based emulsion material was applied onto polyethylene terephthalate (PET) with a bar coater, and then dried at 60 ° C. to laminate an ink receiving layer.

  Finally, polyethylene terephthalate (PET) (manufactured by Toray Industries, Inc.) was brought into contact with the image pattern on the convex portion of the flexographic plate to form an image pattern on the PET substrate on which the ink receiving layer was laminated.

  In Example 1 and Example 2, a high-definition pattern having excellent reproducibility could be printed stably.

  The printed matter manufacturing method of the present invention can stably perform high-definition pattern thin film printing on a flexible substrate such as a plastic film, particularly a long flexible substrate. It can be used to manufacture color filter members such as white matrix and spacers, gate electrodes, source electrodes, drain electrodes, gate insulating films, transistor members such as organic semiconductor materials, and organic EL elements such as organic light emitting layers.

It is sectional drawing for demonstrating an example of the printing method and printing apparatus of 1st embodiment of this invention. It is sectional drawing for demonstrating an example of the printing method and printing apparatus of 2nd embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Cylinder 2 ... Ink peelable surface 3 ... Flexible base material 19 ... Ink peelable refresh surface forming unit 20 ... Ink peelable refresh surface 21 ... Coating portion 22 ... Plate cylinder 23 ... Letter plate 24 ... Residual ink removing roll 25 ... Adhesive substrate 26 ... Back roll 30 ... Ink liquid film 31 ... Image pattern 32 ... Print pattern (on flexible substrate)
33 ... Non-image pattern

Claims (5)

A method for producing a printed material in which an image pattern made of ink is printed on a flexible substrate,
Irradiating a cylinder having a SiO ₂ film formed on its surface with ultraviolet rays;
Forming an ink liquid film on the cylinder;
A step of transferring and removing the ink liquid film corresponding to the non-image pattern to the convex part of the relief plate by rotating and rotating the relief relief plate whose convex part pattern is a non-image pattern against the ink liquid film on the cylinder. When,
And a step of transferring and printing the ink liquid film remaining on the cylinder onto a flexible substrate. 2. The method according to claim 1 , further comprising a step of removing the ink liquid film on the convex portion of the relief plate after the step of transferring and removing the ink liquid film corresponding to the non-image pattern to the convex portion of the relief plate. Manufacturing method for printed materials. A method for producing a printed material in which an image pattern made of ink is printed on a flexible substrate,
Irradiating a cylinder having a SiO ₂ film formed on its surface with ultraviolet rays;
Forming an ink liquid film on the cylinder;
A step of transferring the ink liquid film corresponding to the image pattern to the convex part of the relief plate by rotating and rotating the rotatable relief plate whose convex part pattern is an image pattern against the ink liquid film on the cylinder;
And a step of transferring and printing the ink liquid film on the convex portion of the relief plate onto a flexible substrate. The printed matter production according to claim 3 , further comprising a step of removing an unnecessary ink liquid film remaining on the cylinder after the step of transferring the ink liquid film on the cylinder to a convex portion of a relief printing plate. Method. Method for producing a printed matter according to any one of claims 1 to 4, characterized in that the ink-receiving layer is laminated on the printed surface of the flexible substrate.