JPH11321141A - Intaglio plate having cushioning property - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute direct gravure printing in use of no blanket roll with respect to rigid printed matter by forming a ground metal film on a cushion layer, and also forming a chrome plating film on the surface of the ground metal film in a manner allowing the film thickness to be equal to the depth of a cell. SOLUTION: A cushion layer 2 consisting of rubber having a uniform thickness is wound round on the surface of a roll-shaped plate base material 1 having no opened interstices between joints. Then, a ground metal film 3 is formed on the surface of the cushion layer before being subjected to cylindrical grinding. After that, chrome-plated film is executed so that the film thickness becomes equal to the depth of a cell. Furthermore, the chrome-plated film 5 is coated with a photosensitive film to print an image to subsequently be developed and etched, thus forming an ink reservoir cell 6 so that the ground metal film 3 is exposed on the chrome-plated film 5. Herein, the presence or absence of ballade plating 4 can be neglected.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to color printing of a matrix image for forming a color filter on a liquid crystal panel glass, or color printing of an image on a compact disc or the like. The present invention relates to an intaglio having a cushioning property that is suitable for performing a printing. 2. Description of the Related Art Conventionally, gravure offset printing or waterless offset printing has been used for color printing of a matrix image for forming a color filter on a glass for a liquid crystal panel or color printing of an image on a compact disk or the like. Printing has been adopted, and gravure printing has not been adopted. The reason is that gravure printing has no cushioning property, so if the printing pressure increases, the glass may be broken or the compact disc etc. may be distorted, so printing via a blanket roll made of rubber This is because, when the printing pressure increases, gravure offset printing that can suppress the printing pressure from increasing due to deformation of the rubber is appropriate. In order to perform color printing on glass for liquid crystal panels, it is necessary to make the thickness of the wet ink immediately after the transition to the glass uniform 5 to 6 μm, and to transmit backlight light uniformly and to ensure high transmittance. Further, in order to print an image on a compact disk or the like in color, it is necessary to reduce the thickness of the ink as much as possible to the extent that the image can be sharply obtained. The reason is that the image printed on a compact disk or the like is printed with a bias toward the center, so the weight of the ink forming the image is reduced by the spindle using the fluid dynamic pressure bearing of the next-generation compact disk device. It has been found that as the motor rotates at a higher speed, the cause of unbalanced rotation cannot be ignored. Conventional gravure printing plates have a depth of 15 to 2 in the copper plating surface layer.
It is necessary to form the cells so as to have a thickness of 5 μm, and when the thickness of the wet ink becomes 15 to 25 μm, it is necessary to perform color printing on glass for a liquid crystal panel or color printing on a compact disc or the like. Is not suitable because the ink film thickness is too thick. In the conventional gravure printing plate, the cells cannot be formed by etching on the surface of the copper plating so that the depth is 5 to 6 μm because the copper plating film has a crystalline structure and the progress of etching is not uniform. is there. It is unavoidable that the contours and the bottom surface of the cells have irregularities, and that the cells have different depths depending on the size. In particular, even if a cell having a large shadow portion is obtained so as to have a depth of 5 to 6 μm, a cell having a small highlight portion has a high probability of occurrence of irregularities on the contour and the bottom surface. Hardly hope to get to. Therefore, in order to reliably obtain a gravure plate having a cell depth of 5 to 6 μm, it is necessary to form a fairly accurate cell having a uniform depth by printing an image on an alkali glass, developing it, and etching it with hydrofluoric acid. it can.
However, this is not gravure printing, but gravure offset printing in which printing is performed via a blanket roll. Thus, conventionally, gravure offset printing or lithographic intaglio offset printing without water has been adopted for color printing on glass for liquid crystal panels or color printing on compact discs and the like, and gravure printing has been adopted. Did not. However, the color filter for a liquid crystal panel manufactured by the conventional printing method has low sharpness of an image, disorder of a line image edge,
There is unevenness in the line image, and the quality is remarkably inferior to color filters for liquid crystal panels manufactured by the film method.
For this reason, its use has expanded only to toys, and it has not been used in high-end products such as computer displays and televisions. The cause of the inferior quality of color filters for liquid crystal panels manufactured by gravure offset printing is
It is considered as follows. In gravure offset printing, printing pressure is applied to the ink more or less when ink is transferred from a blanket roll to a printing material such as glass. Since the printing pressure presses the ink, the contour of the ink spreads out or is disturbed, which is one of the causes that the value of the line and space cannot be reduced. Further, when the transferred ink does not transfer from the plate to the blanket roll and from the blanket roll to the printing material such as glass with a probability of 100%, the ink is torn off and the printing is performed on the printing material such as glass. The thickness of the ink is not uniform, and the surface has irregularities. Studies have shown in papers that the transferred ink can be transferred to a substrate such as glass with a 100% probability. According to the method, a 0.1 μm silicone rubber film of an intaglio plate made of alkali glass is coated to impart releasability, and when the photocurable ink is applied to the cells, light is irradiated to irradiate the ink. By making the ink semi-dry and difficult to cut, the ink can be transferred from the plate to the blanket roll with a 100% probability. Irradiate light once more before printing to make the ink semi-dry to make it difficult to cut, and coat the surface of the glass for liquid crystal panel with an acrylic adhesive with a thickness of 0.2 to 0.3 μm. According to the report, the ink could be transferred from the blanket roll to the liquid crystal panel glass with a 100% probability. However, in order to transfer the ink from the blanket roll to the glass for the liquid crystal panel with a probability of 100%, it is an essential condition that the plate and the printing apparatus are manufactured with high precision. That is, with the mechanical accuracy of a normal printing apparatus, it is inevitable that the printing pressure is applied and fluctuates when the ink is transferred from the blanket roll to the glass for the liquid crystal panel. It is very difficult to improve the mechanical precision so that the printing pressure is completely eliminated or does not fluctuate at all. If the printing machine could be manufactured ultra-precisely so that the gap between the blanket roll and the glass for the liquid crystal panel was completely matched with the thickness of the ink, and the gap size did not fluctuate during printing. The pressure hardly changes and does not fluctuate. However, it is almost impossible to put such a device into practical use. This is because the gap between the blanket roll and the glass for the liquid crystal panel is maintained at, for example, 5.5 μm,
When the ink having a thickness of 6 μm adhered to the blanket roll is transferred to the glass for a liquid crystal panel, a printing pressure is generated so that the thickness of the ink becomes 5.5 μm. It is extremely difficult to keep the gap between the blanket roll and the liquid crystal panel glass from fluctuating when the blanket roll rotates and the liquid crystal panel glass moves linearly so as to completely match the speed of the blanket roll surface. It is. The blanket roll needs to be manufactured ultra-precisely so as to be a perfect circle and a perfect cylinder, and the glass for the liquid crystal panel needs to be moved directly so that no wave occurs. Even if the blanket roll has an eccentricity of 1 μm in the diameter, or if the liquid crystal panel glass approaches or moves away from the blanket roll by 1 μm, the ink film thickness becomes 4.5 μm and the printing pressure fluctuates. 4. The gap between the blanket roll and the glass for the liquid crystal panel is 5.
In this case, the ink adhering to the blanket roll cannot be transferred to the glass for a liquid crystal panel. What can be said from this is that no matter how much you pursue ultra-precise gravure offset printing machines,
It is necessary to apply the printing pressure, and it is impossible to suppress the fluctuation of the printing pressure. Therefore, since it is essential that the printing pressure is applied and the printing pressure fluctuates, it is necessary to transfer the ink from the blanket roll to the glass for the liquid crystal panel with a 100% probability.
Even if it can be done through experiments, it is considered very difficult to put it to practical use. The present invention has been devised in view of the above points, and has a cushioning property, so that it is possible to perform direct gravure printing on a hard printing material without using a blanket roll, and at the same time, the depth is reduced. The ability to form cells with a small and smooth bottom and releasability makes it suitable for color printing of matrix images for forming color filters on glass for liquid crystal panels, or for color printing of images on compact discs and the like. It is intended to provide an intaglio having cushioning properties. According to a first aspect of the present invention, a base metal film is formed on a cushion layer made of rubber, and the thickness of the base metal film is made equal to the cell depth on the surface of the base metal film. It is an object of the present invention to provide an intaglio having a cushioning property, wherein a chromium plating film is formed, and cells for containing ink are formed on the chromium plating film so that the base metal film is exposed. The second invention of the present application is to form a base metal film on the surface of the cushioning layer by winding a cushion layer made of rubber having a uniform thickness on the surface of the roll-shaped plate base so that no gap is opened at the seam. After cylindrical polishing, a chrome plating film is formed so that the film thickness is equal to the cell depth,
The chromium plating film is coated with a photosensitive film, an image is printed, developed and etched to form a cell for containing ink so that the base metal film is exposed on the chromium plating film. It is intended to provide an intaglio having a cushioning property. The third invention of the present application is to form a base metal film on a cushion layer made of rubber,
A ballad plating film is formed on the surface of the base metal film, a chrome plating film is further formed so that the film thickness becomes equal to the cell depth, and the ink is contained in the chrome plating film so that the ballad plating film is exposed. It is intended to provide an intaglio having a cushioning property, characterized by forming cells having different shapes. The fourth invention of the present application is that a cushion layer made of rubber having a uniform thickness is wound around a surface of a roll-shaped plate substrate so that no gap is opened at a seam, and a base metal film is formed on the surface of the cushion layer. After the cylindrical polishing, a ballad plating film is formed and the cylindrical polishing is performed.A chromium plating film is further formed so that the film thickness becomes equal to the cell depth, and a photosensitive film is coated on the chrome plating film to form an image. Baking,
It is an object of the present invention to provide an intaglio plate having a cushioning property, wherein a cell for containing ink is formed by developing and etching so that the ballad plating film is exposed on the chromium plating film. The fifth invention of the present application provides a chromium plating film on which the cells are formed,
It is an object of the present invention to provide an intaglio plate having a cushioning property, in which a minute chromium plating film for reinforcing the printing durability of a shadow portion of a screen wire is laminated. A sixth invention of the present application provides an intaglio having a cushioning property, wherein the surface of a chromium plating film formed by the cells is coated with a silicon derivative rubber or a fluorine-based resin. An intaglio having cushioning properties according to an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, (a) is a sectional view showing a roll-shaped intaglio plate material, (b) is an enlarged sectional view of the intaglio plate material, and (c) is a cell formed by etching a chromium plating film of the intaglio plate material. It is an expanded sectional view showing the state where it did. Reference numeral 1 denotes a plate substrate, reference numeral 2 denotes a cushion layer, reference numeral 3 denotes a base metal film, reference numeral 4 denotes ballad plating, reference numeral 5 denotes a chrome plating film, and reference numeral 6 denotes a cell. This intaglio having cushioning properties is a hollow shape having holes to be chucked at both ends, and a smooth surface of a plate substrate 1 made of aluminum (or may be made of iron) whose outer surface is precisely polished to a perfect circle and a cylinder is provided with 5 to 5 A cushion layer 2 made of rubber having a uniform thickness of 10 cm and having a high surface smoothness is wound around and bonded to the seam so that no gap is opened between the seams. The cushion layer 2 is immersed in the plating solution and rotated from the end surface of the plate substrate 1.
To form a base plating (copper plating) by electroless plating, then immersed in an electrolytic copper plating solution, rotated and passed a plating current to the plate substrate 1 to form a base metal for electroplating on the surface of the base plating. After the film (copper plating) 3 is formed, the surface of the base metal film 3 is smoothly cylindrically polished by a grindstone polishing device, and then balladed, and then 25 to 35 μm.
A ballad plating film (copper plating film) 4 is formed so as to have a film thickness of, and the surface of the base metal film 3 is further cylindrically polished smoothly by a grindstone polishing device and further mirror-polished, and then the cell depth becomes equal to the cell depth. The chrome plating film 5 is formed as described above to form a roll-shaped intaglio plate material (FIG. 1A),
Subsequently, after activating the surface of the chromium plating film 5, the photosensitive film is uniformly applied and dried, and the image is directly printed by a laser exposure device, or the film is printed by overlapping and exposing the film. By developing and etching, cells 6 containing ink are formed on the chromium plating film 5 so that the base metal film 3 is exposed, and then the resist is peeled off to complete the intaglio. With this plate, a vivid image of copper color with the ballad plating film 4 exposed can be obtained. When high-definition printing is required by increasing the number of screen lines, for example, to 300 lines / inch, as in the printing of stamps and stamps, the width of the screen lines in the shadow area becomes extremely small. When the printing durability becomes insufficient for sliding contact, chromium plating having a thickness of 1 to 2 μm is applied to the entire surface of the plate after the resist is peeled off. In this case, the printing durability of the chrome-plated screen wire is increased. Further, the ink transfer rate is set at 100% for use in printing for producing a color filter.
%, The surface of the chromium plating film 5 having the cells 6 is coated with a silicon derivative rubber or a fluorine-based resin which cures by deoxygenation so as to have a thickness of 0.1 μm. [0007] The cushion layer 2 has a function of suppressing deformation of the printing pressure due to the printing pressure when the printing pressure tends to be high due to the eccentric rotation of the roll. Play. The intaglio is etched into the chrome plating film 5 to expose the ballad plating 4 on the bottom of the cell 6. This intaglio can easily and accurately control the thickness of the chrome plating film 5. Therefore, the reason why the chrome plating film 5 is etched so that the ballad plating 4 is exposed is that the depth of the cell 6 can be equally obtained from the highlight portion to the shadow portion. In the intaglio printing, the printing of the chrome plating film 5 may be increased to, for example, 10 to 20 μm in printing that requires an ink amount. The intaglio plate is etched on the chromium plating film 5 to expose the ballad plating 4 on the bottom surface of the cell 6, and the surface of the chromium plating film 5 is coated with a silicon derivative rubber 7 having a thickness of 0. Coat to a thickness of 1 μm. This is advantageous in that the oil repellency of the rubber occupying the bottom and side surfaces of the cell 6 functions, and the cell 6 has releasability from ink. When the depth of the cell 6 is made extremely shallow, the oil repellency of the rubber becomes effective. Therefore, when forming the intaglio plate as a plate for color printing on glass for a liquid crystal panel, the thickness of the chromium plating film 5 is set to 4 to 6 μm. Thus,
The intaglio plate for color printing on the liquid crystal panel glass in which the depth of the cell 6 is extremely shallow can have releasability from ink due to the oil repellency of the silicon derivative rubber coated on the surface. When the intaglio is brought into contact with glass and printed, the contact pressure tends to act as a printing pressure, but the contact pressure does not act at all in the cell. The ink is transferred to the glass from the inside of the cell 6, and there is no fear that a large printing pressure is applied at that time. Therefore, the outline of the ink does not spread outward or is disturbed by the printing pressure. For this reason, the intaglio plate according to the present invention for performing color printing for manufacturing a color filter on glass for a liquid crystal panel, when manufactured by printing a pattern accurately using a laser exposure apparatus, has a thickness of 6 μm. Line / space is obtained. Therefore,
By applying a technique of applying a UV ink to the cell 6 with a doctor and irradiating UV rays to make the UV ink semi-dry and then performing color printing on the glass for a liquid crystal panel, the transfer of the ink from the intaglio to the glass is 100%. Therefore, the color filter can be manufactured at a much lower cost by the printing method using the intaglio according to the present invention than by the conventional photolithography method. The thickness of the chrome plating film 5 can be easily and accurately controlled to a desired size. As a result, the depth of the cell 6 can be made equal to the desired size in any of the highlight portion to the shadow portion. As a result, the amount of ink transfer from the highlight to the shadow can be made completely proportional to the cell area, and thus the gradation from the highlight to the shadow can be changed linearly. , And a sharp gravure image with rich gradation is obtained. The intaglio can be removed by tearing and removing the ballard plating 4 after use, so that the intaglio is repeatedly used and economically preferable. The present invention does not require ballad plating. That is, the intaglio having cushioning properties of the present invention is obtained by winding a cushion layer 2 made of rubber having a uniform thickness on the surface of a roll-shaped plate substrate 1 so that no gap is opened at the seam. After the base metal film 3 is formed and cylindrically polished, a chromium plating film 5 is formed so that the film thickness becomes equal to the cell depth, a photosensitive film is coated on the chromium plating film 5, and an image is printed and developed. By etching, the chromium plating film 5 is coated with the base metal film 3.
Also includes an intaglio in which cells 6 for accommodating ink are formed such that the ink is exposed. In the present invention, it is not necessary to coat the silicon derivative rubber on the surface of the chromium plating film having cells. As described above, according to the intaglio having the cushioning property of the present invention, the cushioning layer is provided with the cushioning property so that the printing pressure can be prevented from becoming high and necessary and sufficient. Since it has excellent printing durability, it is possible to directly and satisfactorily print on a hard substrate, particularly on glass. This intaglio allows easy and accurate control of the thickness of the chromium plating film to the desired size, and forms the cells by etching the chromium plating film so that the underlying metal film or ballad plating is exposed. It is possible to obtain a plate in which a cell of a desired arbitrary depth of a few μm to several tens of μm and a uniform depth are engraved vertically from the plate surface, and the thickness of the ink applied to the cell becomes uniform, For thin gravure printing on compact discs, etc., the amount of ink transfer from the highlight to the shadow can be made completely proportional to the cell area, and the gradation from the highlight to the shadow is linear. And a sharp gravure image with a rich gradation of gradation can be obtained. And this intaglio,
When a silicon derivative rubber having oil repellency is coated on the surface of a chromium plating film having cells, an intaglio having uniform cells having a very shallow depth having a releasability to ink can be obtained. Therefore, if direct printing on glass is performed using this intaglio, unlike in gravure offset printing, the ink in the cells is not crushed by the printing pressure, and transfer to the printing substrate can be guaranteed. Therefore, it is possible to avoid the transfer of the ink in the state of the heap in the cross section, which is a drawback in the production of the color filter by the conventional printing method, the film thickness of the ink is extremely thin and uniform, the outline is sharp, and the edge of the outline is less disturbed. It is suitable for printing a clear image having a very thin ink film thickness on a compact disc or the like by color printing. In addition, it is preferable to use UV ink as the ink. The intaglio plate has a chromium plating film formed as shallow as 4 to 6 μm, a photosensitive film is formed, and a pattern is baked by a laser exposure device to form cells on the surface of the chromium plating film and coated with a silicon derivative rubber having oil repellency.
m and n can be realized, and an intaglio having cells having releasability from ink can be obtained. Therefore,
By using a technique of irradiating a UV light source to semi-dry and then transferring the ink placed on the plate cells,
An ink transfer rate of 0% is obtained. Since the intaglio plate has a uniform thickness of the transferred ink and no irregularities on the surface of the ink, the production of a color filter by the above-mentioned printing method can be performed by the printing method with a quality equal to or higher than that of the photolithography method, The manufacturing cost of the filter can be drastically reduced as compared with the photolithography method.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 relates to an intaglio having cushioning properties according to an embodiment of the present invention, wherein (a) is a cross-sectional view showing a roll-shaped intaglio plate, and (b) is an intaglio plate. FIG. 3C is an enlarged cross-sectional view showing a state where cells are formed by etching on a chromium plating film of an intaglio plate material. [Description of Signs] 1 ··· Plate base 2 ··· Cushion layer 3 ··· Base metal film (copper plating) with ease of etching 4 ··· Cell 5 ··· Printing durability Hard film with strength (chrome plating film)

Claims (1)

Claims: 1. A base metal film is formed on a cushion layer made of rubber, and a chromium plating film is formed on the surface of the base metal film so that the film thickness is equal to the cell depth. An intaglio having cushioning properties, wherein a cell for accommodating ink is formed on a chromium plating film so that the base metal film is exposed. 2. A cylinder having a uniform thickness formed by winding a cushion layer made of rubber on the surface of a roll-shaped plate substrate so that no gap is opened at the seam, and forming a base metal film on the surface of the cushion layer. After polishing, a chromium plating film is formed so that the film thickness is equal to the cell depth, a photosensitive film is coated on the chromium plating film, an image is printed, developed and etched, so that the chrome plating film is formed. An intaglio having cushioning properties, wherein cells for containing ink are formed so that the base metal film is exposed. 3. A base metal film is formed on a cushion layer made of rubber, a ballad plating film is formed on the surface of the base metal film, and a chrome plating film is formed so that the film thickness is equal to the cell depth. An intaglio having cushioning properties, wherein cells for containing ink are formed on the chromium plating film so that the ballad plating film is exposed. 4. A cylinder formed by wrapping a cushion layer made of rubber having a uniform thickness on the surface of a roll-shaped plate substrate so that no gap is opened at a seam, and forming a base metal film on the surface of the cushion layer. After polishing, a ballad plating film is formed, cylindrical polishing is performed, and a chromium plating film is further formed so that the film thickness is equal to the cell depth, a photosensitive film is coated on the chrome plating film, and an image is printed. An intaglio having cushioning properties, wherein a cell for containing ink is formed by developing and etching so that the ballad plating film is exposed on the chrome plating film. 5. The fine chromium which reinforces the printing durability of the shadow portion of the screen wire on the surface of the chromium plating film formed with the cells according to any one of [1] to [4]. An intaglio having cushioning properties, wherein a plating film is formed by lamination. 6. A chromium plating film on which a cell according to any one of [1] to [4] is formed, wherein the surface of the chromium plating film is coated with a silicon derivative rubber or a fluorine resin. Intaglio with cushioning properties.