JP2007118593A - Photogravure reproduction roll with cushion layer and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a gravure plate having a cushion property suitable for color printing a matrix image for composing a color filter in a glass for liquid crystal or color printing an image on a compact disk or the like by enabling good gravure printing on a rough surface such as flexo printing or the like since direct gravure printing which does not use a blanket roll for a hard printed matter by having a printing form plate especially a cushion property. <P>SOLUTION: A hollow roll 11a on a surface of which a cushion layer 11b comprising rubber or resin having a cushion property; a copper plated layer 12 provided on a surface of the cushion layer 11b and many gravure cells 14 formed on the surface of the cushion layer 11b; a metal layer 16 provided on a surface of the copper plated layer 12; a metallic carbide layer 18 of the metal provided on a surface of the metal layer 16; and a diamond like carbon film 20 which covers a surface of the metallic carbide layer 18, are contained. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cushioning layer suitable for printing on a rough surface such as cardboard, printing an image on a compact disk or the like, or color printing a matrix image for constituting a color filter on a glass for a liquid crystal panel. More particularly, the present invention relates to a gravure printing roll with a cushion layer in which a diamond-like carbon (DLC) coating layer is provided as a surface-enhanced coating layer, and a method for manufacturing the same.

  Conventionally, gravure offset printing or waterless offset printing has been adopted for color printing of matrix images for forming color filters on printing plates, especially glass for liquid crystal panels, or color printing of images on compact discs, etc. Gravure printing has not been adopted. The reason for this is that gravure printing is not cushioning, so if the printing pressure increases, it may break the glass or distort the compact disc, etc., so printing via a blanket roll made of rubber This is because, when the printing pressure increases, gravure offset printing that can suppress an increase in printing pressure by deformation of rubber is appropriate.

  For color printing on glass for liquid crystal panels, the thickness of the wet ink film immediately after transfer to the glass is set to a uniform 5-6 μm, and the dry ink film thickness is set to a uniform 1-1.5 μm. It is necessary to ensure uniform transmission and high transmittance. In addition, in order to print an image on a compact disk or the like, it is necessary to make the ink film thickness as thin as possible to the extent that the image can be obtained sharply. The reason is that the image printed on a compact disk or the like is printed with a bias with respect to the center, so the weight of the ink forming the image is the spindle that uses the fluid dynamic pressure bearing of the next generation compact disk device It was found that as the motor rotates faster, it can no longer be ignored as the cause of unbalanced rotation.

  In conventional gravure printing plates, it is necessary to form cells in the surface layer portion of copper plating so that the depth is 15 to 25 μm. Then, the film thickness of the wet ink is 15 to 25 μm. The film thickness of the ink is not suitable for color printing on glass or color printing of images on compact discs.

  In conventional gravure printing plates, the cells cannot be etched to a depth of 5-6 μm on the surface of the copper plating because the copper plating film has a crystalline structure and the etching process is not performed uniformly. is there. It is inevitable that the contour and bottom surface of the cell are uneven and that cells having different depths depending on the size are formed. Especially for cells with a large shadow part, even if the depth is 5 to 6 μm, for cells with a small highlight part, there is a high probability of irregularities on the contour and bottom, and the depth is reliably 5 to 6 μm. Can hardly get to.

  Therefore, in order to reliably obtain a gravure plate having a cell depth of 5 to 6 μm, it is possible to form a fairly accurate cell having a uniform depth by printing an image on alkali glass, developing and etching 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 waterless flat printing plate offset printing has been adopted for color printing on glass for liquid crystal panels or color printing on compact discs, etc., and gravure printing has been adopted. I did not come.

  On the other hand, conventional flexographic plates (resin relief plates) are formed by applying a mask film on a photocurable resin and irradiating it with infrared light for etching, or by forming a carbon black film on the photocurable resin to form a positive photosensitive resin. A film is applied, a negative image is printed with a laser, developed, and then irradiated with infrared light and then etched to make a plate.

  However, the color filter for liquid crystal panels manufactured by the conventional printing method has low image sharpness, the edge of the line image is irregular, and the line image has irregularities. The quality is remarkably inferior to that of the above, and therefore, its use is widespread only for toys, and it is not used at all for luxury products such as computer displays and televisions.

  The reason why the quality of the color filter for a liquid crystal panel manufactured by gravure offset printing is inferior is considered as follows. In gravure offset printing, a printing pressure is applied to some extent when ink is transferred from a blanket roll to a substrate such as glass. Since the printing pressure presses the ink, the contour of the ink spreads outward or is disturbed, which is one of the reasons why the line and space value cannot be reduced. In addition, when the transferred ink does not transfer from the plate to the blanket roll and from the blanket roll to the printed material such as glass with a probability of 100%, the ink is torn off and printed on the printed material such as glass. The ink film thickness is not uniform and the surface is uneven.

  Research results have been published in the paper that the transferred ink can be transferred to a printed material such as glass with 100% probability. According to this, a 0.1 μm silicon rubber film on a printing plate made of alkali glass is coated to give releasability, and light is irradiated when the photocurable ink is applied to the cell. The ink was transferred to the blanket roll from the plate with a probability of 100% by semi-drying the ink to make it difficult to break. Furthermore, the ink transferred to the blanket roll of silicon derivative was used for liquid crystal panels. Before printing on glass, irradiate the light once more to make the ink semi-dry and make it hard to break, and coat the surface of the liquid crystal panel glass with an acrylic adhesive with a thickness of 0.2 to 0.3 μm By doing so, the ink could be transferred from the blanket roll to the liquid crystal panel glass with a probability of 100%.

  However, in order to transfer the ink from the blanket roll to the liquid crystal panel glass with a probability of 100%, it is indispensable to manufacture a plate and a printing apparatus with high precision. That is, with the mechanical accuracy of a normal printing apparatus, it is inevitable that printing pressure is applied and fluctuates when ink is transferred from a blanket roll to glass for a liquid crystal panel. It is extremely difficult to increase the mechanical accuracy so that the printing pressure is completely eliminated or does not fluctuate at all.

  If the printing machine can be manufactured with high precision so that the gap between the blanket roll and the glass for the LCD panel is completely matched with the ink film thickness, and the gap dimension does not fluctuate during printing. The pressure is almost constant and does not fluctuate. However, it is almost impossible to put such a device into practical use.

  This is because when the gap between the blanket roll and the liquid crystal panel glass is maintained at, for example, 5.5 μm, and the 6 μm thick ink adhering to the blanket roll is transferred to the liquid crystal panel glass, the ink film thickness is Printing pressure is generated so as to be 5.5 μm. When the blanket roll rotates and when the liquid crystal panel glass is moved directly in line with the surface speed of the blanket roll, it is difficult to prevent the gap between the blanket roll and the liquid crystal panel glass from changing at all. It is.

  The blanket roll needs to be manufactured with high precision so as to be a perfect circle and a perfect cylinder, and the glass for the liquid crystal panel needs to be linearly moved so that no wave motion occurs. Even if the diameter of the blanket roll has an eccentricity of 1 μm, 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. In addition, the gap between the blanket roll and the liquid crystal panel glass becomes larger than 5.5 μm, and at this time, the ink adhering to the blanket roll cannot be transferred to the liquid crystal panel glass.

  What can be said from this is that no matter how much the precision of the gravure offset printing machine is pursued, 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 printing pressure is applied and the printing pressure fluctuates, it is very difficult to put it into practical use even if it is possible to transfer ink from the blanket roll to the liquid crystal panel glass with a probability of 100%. It is believed that there is.

  On the other hand, the conventional flexographic plate (resin relief plate) uses a photo-curing resin, so if a small dot is formed in a columnar shape, it easily breaks, and the brittleness of the cured resin cannot be eliminated. Could not make.

  Also, in gravure printing, a gravure printing roll (gravure cylinder) is formed with a minute recess (gravure cell) according to the plate making information to produce a plate surface, and the gravure cell is filled with ink and transferred to a printing material. Is. In a general gravure plate roll, a copper plating layer (plate material) for forming a plate surface is provided on the surface of a hollow roll made of a metal such as aluminum or iron or a reinforced resin such as carbon fiber reinforced resin (CFRP). A large number of concave portions (gravure cells) are formed on the plating layer according to the plate making information by etching, and then a hard chromium layer is formed by chromium plating to increase the printing durability of the gravure plate making roll to form a surface-enhanced coating layer. , Plate making (plate surface production) is completed. However, because highly toxic hexavalent chromium is used in the chrome plating process, there is an extra cost to maintain work safety, and there are also problems of pollution, and the surface-enhanced coating layer replaces the chrome layer. The current situation is that the appearance of

On the other hand, for the production of a gravure printing roll (gravure cylinder), a technique is known in which diamond-like carbon (DLC) is formed on a copper plating layer on which cells are formed and used as a surface reinforcing coating layer (Patent Documents 1 to 3). ), The DLC layer has a problem that the adhesiveness with copper is weak and easy to peel off. The applicant of the present application has already proposed a technique for forming a gravure printing plate by forming a rubber or resin layer on a hollow roll, forming a diamond-like carbon (DLC) film thereon, and then forming a cell. (Patent Documents 4 to 7).
JP-A-4-282296 JP 2002-172752 A JP 2002-178653 A Japanese Patent Laid-Open No. 11-309950 JP-A-11-327124 JP 2000-15770 A JP 2000-10300 A

  The present invention has been devised in view of the above points, and has a printing plate, in particular, a cushioning property, so that direct gravure printing can be performed on a hard substrate without using a blanket roll, and cardboard printing. Cushioning that is suitable for gravure printing on rough surfaces, such as matrix printing for color filters on glass for liquid crystal panels, or color printing on compact discs, etc. It aims at providing the manufacturing method of the gravure plate which has.

  In order to solve the above-mentioned problems, a gravure plate-making roll with a cushion layer according to the present invention is provided with a hollow roll provided with a cushion layer made of rubber or a resin having cushioning properties on the surface, and provided on the surface of the cushion layer. Copper plating layer on which a number of gravure cells are formed, a metal layer provided on the surface of the copper plating layer, a metal carbide layer of the metal provided on the surface of the metal layer, and a surface of the metal carbide layer And a diamond-like carbon coating for coating.

  The method for producing a gravure printing roll with a cushion layer according to the present invention includes a step of preparing a hollow roll provided with a cushion layer made of rubber or a resin having cushioning properties on the surface, and a copper plating layer is formed on the surface of the cushion layer. A copper plating step, a gravure cell forming step of forming a number of gravure cells on the surface of the copper plating layer, a metal layer forming step of forming a metal layer on the surface of the copper plating layer, and a surface of the metal layer. A metal carbide layer forming step of forming a metal metal carbide layer; and a diamond-like carbon film forming step of forming a diamond-like carbon film on the surface of the metal carbide layer.

  The metal carbide layer is preferably a metal carbide gradient layer, and the carbon composition ratio in the metal carbide gradient layer is such that the carbon ratio gradually increases from the metal layer side to the diamond-like carbon coating direction. Is set.

  The copper plating layer has a thickness of 50 to 200 μm, the gravure cell has a depth of 5 to 150 μm, and the metal layer has a thickness of 0.001 to 1 μm, preferably 0.001 to 0.1 μm, more preferably 0.00. Preferably, the metal carbide layer has a thickness of 0.1 to 1 μm, and the diamond-like carbon film has a thickness of 0.1 to 10 μm.

  It is preferable that the metal layer, the metal carbide layer, preferably the metal carbide inclined layer, and the diamond-like carbon film are formed by sputtering.

  The metal is preferably a metal that can be carbonized and has a high affinity for copper.

  The metal is one or more metals selected from the group consisting of tungsten (W), silicon (Si), titanium (Ti), chromium (Cr), tantalum (Ta), and zirconium (Zr). Is preferred.

  The gravure cell is preferably formed by an etching method or an electronic engraving method.

  According to the present invention, the printing plate can have cushioning properties, and direct gravure printing can be performed on a hard substrate without using a blanket roll, and a color filter is formed on the glass for a liquid crystal panel. Therefore, it is suitable for color printing a matrix image or color printing an image on a compact disk or the like, and printing on a rough surface such as corrugated cardboard printing can be performed well. In addition, according to the present invention, the use of a diamond-like carbon (DLC) film as the surface-enhanced coating layer eliminates the need for chromium plating, thereby eliminating the use of highly toxic hexavalent chromium. No extra cost for safety is required, there is no concern about pollution, and the diamond-like carbon (DLC) film has a strength equivalent to that of the chromium layer and excellent printing durability. .

  Embodiments of the present invention will be described below, but these embodiments are exemplarily shown, and it goes without saying that various modifications can be made without departing from the technical idea of the present invention.

  FIG. 1 is an explanatory view schematically showing a production process of a gravure plate-making roll with a cushion layer according to the present invention. (A) is a plate base material in which a cushion layer made of a rubber or a resin having cushioning properties is provided on the surface of a hollow roll. (B) is a partially enlarged sectional view showing a state in which a copper plating layer is formed on the surface of the cushion layer, (c) is a partially enlarged sectional view showing a state in which a gravure cell is formed in the copper plating layer, d) is a partially enlarged sectional view showing a state in which a tungsten carbide layer is formed on the surface of the copper plating layer, (e) is a partially enlarged sectional view showing a state in which the metal carbide layer is formed on the surface of the metal layer, and (f) is carbonized. It is a partial expanded sectional view which shows the state which coat | covered the diamond-like carbon (DLC) film on the metal layer surface. FIG. 2 is a flowchart showing a method for producing a gravure plate-making roll of the present invention. FIG. 3 is an enlarged cross-sectional view of the main part of the gravure printing roll with a cushion layer of the present invention.

  The method of the present invention will be described with reference to FIGS. 1A and 3, reference numeral 10 denotes a plate base material in which a cushion layer 11 b is provided on the surface of a hollow roll 11 a made of reinforced resin such as aluminum, iron, or carbon fiber reinforced resin (CFRP). Is used (step 100 in FIG. 2). The cushion layer 11b is made of rubber or a resin having cushioning properties, and a sheet-like material having a uniform thickness of about 1 mm to 10 cm and high surface smoothness is formed on the hollow roll 11a so as not to open a gap at the seam. Wound and firmly bonded, then precision cylindrical grinding and mirror polishing. A copper plating layer 12 is formed on the surface of the cushion layer 11b by a copper plating process (step 102 in FIG. 2).

  A large number of minute recesses (gravure cells) 14 are formed on the surface of the copper plating layer 12 (step 104 in FIG. 2). As a method for forming the gravure cell 14, an etching method (a photosensitive liquid is applied to the plate cylinder surface and directly baked and then etched to form the gravure cell 14) or an electronic engraving method (a diamond engraving needle is machined by a digital signal) A known method such as engraving the gravure cell 14 on the copper surface can be used, but an etching method is preferred.

  Next, a metal layer 16 is formed on the surface of the copper plating layer 12 (including the gravure cell 14) on which the gravure cell 14 is formed (step 106 in FIG. 2). Further, a metal carbide layer of the metal, preferably a metal carbide gradient layer 18 is formed on the surface of the metal layer 16 (step 108 in FIG. 2). As a method for forming the metal layer 16 and the metal carbide layer, preferably the metal carbide inclined layer 18, a sputtering method, a vacuum deposition method (electron beam method), an ion plating method, an MBE (molecular beam epitaxy method), a laser ablation method, Known methods such as ion-assisted film formation and plasma CVD can be applied, but sputtering is preferred.

  The metal is preferably a metal that can be carbonized and has a high affinity for copper. As this metal, tungsten (W), silicon (Si), titanium (Ti), chromium (Cr), tantalum (Ta), zirconium (Zr), or the like can be used.

  As the metal in the metal carbide layer, preferably the metal carbide inclined layer 18, the same metal as the metal layer 16 is used. The composition ratio of carbon in the metal carbide inclined layer 18 is set so that the ratio of carbon gradually increases from the metal layer 16 side toward the diamond-like carbon (DLC) coating 20 described later. That is, film formation is performed so that the composition ratio of carbon increases from 0% to gradually (stepwise or steplessly), and finally becomes approximately 100%.

  In this case, a known method may be used to adjust the composition ratio of carbon in the metal carbide layer, preferably the metal carbide inclined layer 18. For example, a sputtering method (using a solid metal target and hydrocarbon in an argon gas atmosphere) Gas, for example, methane gas, ethane gas, propane gas, butane gas, acetylene gas, or the like, is gradually increased stepwise or steplessly to increase the ratio of carbon in the metal carbide layer 18 to the copper plating layer 12 side. A metal carbide layer in which the composition ratio of both carbon and metal is changed so as to gradually increase stepwise or steplessly with respect to the diamond-like carbon (DLC) coating 20 direction, that is, a metal carbide inclined layer 18 is formed. can do.

  By adjusting the carbon ratio of the metal carbide layer 18 in this manner, the adhesion of the metal carbide layer 18 to both the metal layer 16 and the diamond-like carbon (DLC) film 20 can be improved. Further, if the injection amount of hydrocarbon gas is constant, a metal carbide layer having a constant composition ratio of carbon and metal can be obtained, and the same action as that of the metal carbide gradient layer can be performed.

  Subsequently, a diamond-like carbon (DLC) film 20 is formed on the surface of the metal carbide layer, preferably the metal carbide inclined layer 18 (step 110 in FIG. 2). As a method for forming the diamond-like carbon (DLC) film 20, as in the formation of the metal layer 16 and the metal carbide layer, preferably the metal carbide inclined layer 18, a sputtering method, a vacuum deposition method (electron beam method), an ion plating method. Known methods such as a method, MBE (molecular beam epitaxy method), laser ablation method, ion-assisted film formation method, plasma CVD method and the like can be applied, but a sputtering method is preferable.

  By coating the diamond-like carbon (DLC) film 20 and causing the diamond-like carbon (DLC) film 20 to act as a surface-enhanced coating layer, there is no toxicity and no concern about the occurrence of pollution, and printing durability. Can be obtained.

  Here, the sputtering method is a method for producing a thin film by depositing the splashed material on a substrate when ions are struck against a material (target material) to be formed into a thin film. There are few restrictions on materials, and the thin film can be manufactured in a large area with good reproducibility.

  The vacuum deposition method (electron beam method) is a method for producing a thin film by irradiating a material to be thinned with an electron beam, evaporating it by heating, and depositing (depositing) the evaporated material on a substrate. There are features such as fast and less damage to the substrate.

  In the ion plating method, a material to be thinned is evaporated and then deposited on a substrate ionized by radio frequency (RF) (RF ion plating method) or arc (arc ion plating method) to produce a thin film. There are features such as a high deposition rate and high adhesion strength.

  The molecular beam epitaxy method is a method in which a raw material is evaporated in an ultrahigh vacuum and supplied onto a heated substrate to form a thin film.

  The laser ablation method is a method in which ions are emitted by making a high-density laser pulse incident on a target to form a thin film on an opposing substrate.

  The ion-assisted film formation method is a method in which an evaporation source and an ion source are installed in a vacuum vessel and a film is formed using ions supplementarily.

  The plasma CVD method is a method in which a source gas is decomposed using plasma excitation and reactively deposited on a substrate for the purpose of forming a thin film at a lower temperature when the CVD method is performed under reduced pressure.

The present invention will be described more specifically with reference to the following examples. However, it is needless to say that these examples are shown by way of illustration and should not be construed in a limited manner.
Example 1
Using a boomerang line (a gravure plate making apparatus manufactured by Sink Laboratories, Inc.), formation of a copper plating layer and etching treatment described below were performed. First, a plate base material with a cushion layer formed by winding a silicon rubber layer having a thickness of 5 cm around the surface of an aluminum hollow roll having a circumference of 600 mm and a surface length of 1100 mm was prepared. This plate base material is mounted on a plating tank, the anode chamber is brought close to a hollow roll up to 20 mm by an automatic slide device by a computer system, the plating solution is overflowed, and the plate base material is completely submerged to be 18 A / dm ² , 6. An 80 μm copper plating layer was formed at 0V. The plating time was 20 minutes, and the surface of the plating was free of spots and pits, and a uniform copper plating layer was obtained. The surface of the copper plating layer was polished for 12 minutes using a 4H polishing machine (Sink Laboratory polishing machine) to make the surface of the copper plating layer a uniform polishing surface.

A photosensitive film (thermal resist: TSER-2104E4) was applied to the copper plating layer formed above (fonte coater) and dried. The film thickness of the obtained photosensitive film was 4 μm as measured by a film thickness meter (F20 manufactured by FILLMETRICS, sold by Matsushita Techno Trading). The image was then developed with laser exposure. It said laser exposure was carried out a predetermined pattern exposed in the exposure condition 5 min / m ^2/10 W using a Laser Stream FX. The development was performed at 24 ° C. for 60 seconds at a developer dilution ratio (stock solution 1: water 7) using a TLD developer (Sink Laboratory Co., Ltd. developer) to form a predetermined pattern. This pattern was dried (burned) to form a resist image.

  Further, cylinder printing was performed to engrave an image composed of gravure cells, and then the resist image was removed to form a printing plate. At this time, a cylinder was manufactured with a gravure cell depth of 5 μm. The etching was performed by a spray method under the conditions of a copper concentration of 60 g / L, a hydrochloric acid concentration of 35 g / L, a temperature of 37 ° C., and a time of 70 seconds.

  A tungsten (W) layer was formed by sputtering on the upper surface of the copper plating layer on which the gravure cell was formed. The sputtering conditions are as follows. Tungsten (W) sample: solid tungsten target, atmosphere: argon gas atmosphere, deposition temperature: 200 to 300 ° C., deposition time: 60 minutes, deposition thickness: 0.03 μm.

  Next, a tungsten carbide layer was formed on the top surface of the tungsten (W) layer. The sputtering conditions are as follows. Tungsten (W) sample: solid tungsten target, atmosphere: hydrocarbon gas gradually increased in an argon gas atmosphere, film formation temperature: 200 to 300 ° C., film formation time: 60 minutes, film formation thickness: 0.1 μm.

  Further, a diamond-like carbon (DLC) film was formed on the upper surface of the tungsten carbide layer by sputtering. The sputtering conditions are as follows. DLC sample: solid carbon target, atmosphere: argon gas atmosphere, film formation temperature: 200 to 300 ° C., film formation time: 150 minutes, film formation thickness: 1 μm. In this way, a gravure printing roll (gravure cylinder) was completed.

Subsequently, a cyan ink Zahn cup viscosity 18 seconds (water-based ink super rampy pure indigo 800PR-5 manufactured by Sakata Inx Co., Ltd.) was applied as a printing ink to the obtained gravure cylinder, and an OPP film (Oriented Polypropylene Film: biaxially oriented polypropylene film) ) Was used to perform a printing test (printing speed: 120 m / min). The obtained printed matter had no plate fog and could be printed up to a length of 50,000 m. The accuracy of the pattern did not change. Moreover, there was no problem in the adhesion of the DLC film to the etched copper plating cylinder. Since the gradation from the highlight portion to the shadow portion of the gravure cylinder of the present invention was not different from that of the chrome-plated gravure cylinder produced according to a conventional method, it is determined that there is no problem in ink transferability. As a result, it was confirmed that the diamond-like carbon (DLC) film has a performance comparable to that of the conventional chromium layer and can be sufficiently used as a substitute for the chromium layer.
(Example 2)
A cylinder having a gravure cell depth of 5 μm was produced in the same manner as in Example 1. A gravure plate-making roll with a cushion layer was completed in the same manner as in Example 1 except that the tungsten (W) sample was changed to a silicon (Si) sample for this cylinder, and a printing test was conducted in the same manner. It was found to have equivalent printing performance such as no fog. As a result, it was confirmed that the diamond-like carbon (DLC) film has a performance comparable to that of the conventional chromium layer and can be sufficiently used as a substitute for the chromium layer. In addition, the same experiment was performed using titanium (Ti) and chromium (Cr) as a metal sample, and it was confirmed that the same result was obtained.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows typically the manufacturing process of the gravure plate-making roll with a cushion layer of this invention, (a) is the whole cross section of the plate base material which provided the cushion layer which consists of resin which has rubber | gum or cushioning properties on the surface of a hollow roll (B) is a partially enlarged sectional view showing a state in which a copper plating layer is formed on the surface of the cushion layer, (c) is a partially enlarged sectional view showing a state in which a gravure cell is formed in the copper plating layer, and (d) is a drawing. The partial expanded sectional view which shows the state which formed the tungsten carbide layer in the copper plating layer surface, (e) is the partial expanded sectional view which shows the state in which the metal carbide layer was formed in the metal layer surface, (f) is the metal carbide layer surface It is a partial expanded sectional view which shows the state which coat | covered the diamond-like carbon (DLC) film on. It is a flowchart which shows the manufacturing method of the gravure printing roll of this invention. It is an expanded sectional view of the important section of the gravure plate-making roll with a cushion layer of the present invention.

Explanation of symbols

10: Plate base material (rubber roll, etc.), 10a: Gravure plate roll, 11a: Hollow roll, 11b: Cushion layer, 12: Copper plating layer, 14: Gravure cell, 16: Metal layer, 18: Metal carbide layer, preferably Metal carbide gradient layer, 20: Diamond-like carbon (DLC) coating.

Claims (12)

  A hollow roll provided with a cushion layer made of rubber or a resin having cushioning properties on the surface, a copper plated layer provided on the surface of the cushion layer and having a number of gravure cells formed on the surface, and a surface of the copper plated layer A gravure with a cushion layer, comprising: a metal layer provided on the metal layer; a metal carbide layer of the metal provided on a surface of the metal layer; and a diamond-like carbon film covering the surface of the metal carbide layer. Plate making roll.   The metal carbide layer is a metal carbide inclined layer, and the composition ratio of carbon in the metal carbide inclined layer is set so that the carbon ratio gradually increases from the metal layer side to the diamond-like carbon coating direction. The gravure printing roll with a cushion layer according to claim 1, wherein the roll is a gravure printing roll.   The copper plating layer has a thickness of 50 to 200 μm, the gravure cell has a depth of 5 to 150 μm, the metal layer has a thickness of 0.001 to 1 μm, the metal carbide layer has a thickness of 0.1 to 1 μm, and The gravure printing roll with a cushion layer according to claim 1 or 2, wherein the diamond-like carbon coating has a thickness of 0.1 to 10 µm.   The gravure plate-making roll with a cushion layer according to any one of claims 1 to 3, wherein the metal is a metal that can be carbonized and has a high affinity for copper.   The metal is one or more metals selected from the group consisting of tungsten (W), silicon (Si), titanium (Ti), chromium (Cr), tantalum (Ta), and zirconium (Zr). The gravure plate-making roll with a cushion layer of any one of Claims 1-4 characterized by these.   A step of preparing a hollow roll provided with a cushion layer made of rubber or a resin having cushioning properties on the surface, a copper plating step of forming a copper plating layer on the surface of the cushion layer, and a number of surfaces on the surface of the copper plating layer A gravure cell forming step for forming a gravure cell, a metal layer forming step for forming a metal layer on the surface of the copper plating layer, and a metal carbide layer forming step for forming a metal carbide layer of the metal on the surface of the metal layer; And a diamond-like carbon coating film forming step of forming a diamond-like carbon film on the surface of the metal carbide layer.   The metal carbide layer is a metal carbide inclined layer, and the composition ratio of carbon in the metal carbide inclined layer is set so that the carbon ratio gradually increases from the metal layer side to the diamond-like carbon coating direction. The manufacturing method of the gravure printing roll with a cushion layer of Claim 6 characterized by the above-mentioned.   The copper plating layer has a thickness of 50 to 200 μm, the gravure cell has a depth of 5 to 150 μm, the metal layer has a thickness of 0.001 to 1 μm, the metal carbide layer has a thickness of 0.1 to 1 μm, and The method for producing a gravure printing roll with a cushion layer according to claim 6 or 7, wherein the diamond-like carbon film has a thickness of 0.1 to 10 µm.   The method for producing a gravure plate-making roll with a cushion layer according to any one of claims 6 to 8, wherein the metal layer, the metal carbide layer, and the diamond-like carbon film are formed by sputtering.   The method for producing a gravure plate-making roll with a cushion layer according to any one of claims 6 to 9, wherein the metal is carbonizable and has a high affinity for copper.   The metal is one or more metals selected from the group consisting of tungsten (W), silicon (Si), titanium (Ti), chromium (Cr), tantalum (Ta), and zirconium (Zr). The manufacturing method of the gravure printing roll with a cushion layer of any one of Claims 6-10 characterized by these.   The method for producing a gravure printing roll with a cushion layer according to any one of claims 6 to 11, wherein the gravure cell is formed by an etching method or an electronic engraving method.

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