WO2010106827A1 - 平版印刷版材料および平版印刷版 - Google Patents
平版印刷版材料および平版印刷版 Download PDFInfo
- Publication number
- WO2010106827A1 WO2010106827A1 PCT/JP2010/050329 JP2010050329W WO2010106827A1 WO 2010106827 A1 WO2010106827 A1 WO 2010106827A1 JP 2010050329 W JP2010050329 W JP 2010050329W WO 2010106827 A1 WO2010106827 A1 WO 2010106827A1
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- WIPO (PCT)
- Prior art keywords
- printing plate
- lithographic printing
- plate material
- mass
- photosensitive layer
- Prior art date
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/038—Macromolecular compounds which are rendered insoluble or differentially wettable
- G03F7/0382—Macromolecular compounds which are rendered insoluble or differentially wettable the macromolecular compound being present in a chemically amplified negative photoresist composition
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
- B41C1/1008—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
- B41C2210/04—Negative working, i.e. the non-exposed (non-imaged) areas are removed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
- B41C2210/06—Developable by an alkaline solution
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
- B41C2210/22—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation characterised by organic non-macromolecular additives, e.g. dyes, UV-absorbers, plasticisers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
- B41C2210/24—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation characterised by a macromolecular compound or binder obtained by reactions involving carbon-to-carbon unsaturated bonds, e.g. acrylics, vinyl polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C2210/00—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation
- B41C2210/26—Preparation or type or constituents of the imaging layers, in relation to lithographic printing forme preparation characterised by a macromolecular compound or binder obtained by reactions not involving carbon-to-carbon unsaturated bonds
- B41C2210/262—Phenolic condensation polymers, e.g. novolacs, resols
Definitions
- the present invention relates to a lithographic printing plate material having a negative photosensitive layer used in a so-called computer-to-plate (hereinafter referred to as “CTP”) system, and more particularly, exposure by a near infrared laser.
- CTP computer-to-plate
- the present invention relates to a lithographic printing plate material and a lithographic printing plate which are capable of forming an image and have excellent solvent resistance and abrasion resistance in the image area after plate making.
- the lithographic printing plate material using these techniques has a certain level of printing durability, the image portion is not sufficiently crosslinked, and the image portion is poor in solvent resistance and abrasion resistance. Therefore, the resistance to various chemicals and cleaners used at the time of printing is insufficient, and when a cleaner containing a large amount of solvent is used or a cleaner containing an abrasive is used, the printing durability is significantly deteriorated. There are things to do. In such a case, a baking process after development was performed to proceed with crosslinking of the image area, but a lithographic printing plate having sufficient solvent resistance and abrasion resistance can be obtained without baking process. A lithographic printing plate material was desired.
- the present invention has been made in view of the above problems, and the object of the present invention is excellent in the solvent resistance and abrasion resistance of the image area after plate-making on a lithographic printing plate, and is capable of near-infrared laser exposure. It is to provide a negative lithographic printing plate material and a lithographic printing plate.
- the photosensitive layer contains the following a to d: a: a binder resin b: a crosslinking agent c: an infrared absorber d: an acid generator and a containing a novolac resin containing a phenol part in a mass ratio of 20% by mass to 100% by mass, and a polyvinyl phenol polymer,
- the content ratio of the novolak resin and the polyvinylphenol polymer (the mass of the novolak resin: the mass of the polyvinylphenol polymer) is 7: 3 to 3: 7, and the mass ratio of b / a is 0.25.
- the lithographic printing plate material is characterized by being 0.50 or less.
- the treatment conditions in the heat treatment are lithographic A lithographic printing plate characterized in that the plate surface temperature of the printing plate material is 130 ° C or higher and 155 ° C or lower.
- the heating device used for the heat treatment is a device for heating while transporting the lithographic printing plate material, the heating device has a plurality of heating zones whose temperatures can be individually set, and the lithographic printing plate material passes last. 6.
- a negative lithographic printing plate material and a lithographic printing plate which are excellent in solvent resistance and abrasion resistance of an image area after plate making and capable of near-infrared laser exposure on a lithographic printing plate. Can do.
- the lithographic printing plate material of the present invention is a lithographic printing plate material having a photosensitive layer on a roughened and anodized aluminum support, the photosensitive layer containing the following ad: a binder resin b cross-linking agent c infrared absorber d acid generator and a containing a novolac resin having a phenol part in a mass ratio of 20% by mass or more and 100% by mass or less, and a polyvinylphenol polymer,
- the content ratio with respect to the polyvinylphenol polymer (the mass of the novolak resin: the mass of the polyvinylphenol polymer) is 7: 3 to 3: 7, and the mass ratio of b / a is 0.25 or more;
- the binder having a specific configuration as described above is used, and the ratio of the binder and the crosslinking agent is within the specific range, so that the solvent resistance and the wear resistance are good and the printing durability is improved. Can be obtained.
- Various aluminum alloys can be used, for example, alloys of aluminum such as silicon, copper, manganese, magnesium, chromium, zinc, lead, bismuth, nickel, titanium, sodium, iron, etc., and various rolling methods.
- the aluminum plate manufactured by can be used.
- a recycled aluminum plate obtained by rolling recycled aluminum ingots such as scrap materials and recycled materials that are becoming popular in recent years can also be used.
- the aluminum plate preferably contains 0.1 to 0.4% by mass of Mg in terms of printing durability from the viewpoint of contamination.
- containing Mg means that the aluminum plate contains Mg as its elemental composition.
- the aluminum plate used in the present invention may be an aluminum plate having a concavo-convex surface formed by transferring a concavo-convex pattern in advance, or may be formed by transferring a concavo-convex pattern to the aluminum plate.
- the process of forming unevenness by rolling is not limited, it is preferable to perform rolling using a rolling roll.
- the aluminum plate can also be used by forming irregularities by lamination rolling, transfer or the like in the final rolling step or the like.
- a method of forming a concavo-convex pattern on the surface is preferred. Specifically, the method described in JP-A-6-262203 can be preferably used.
- the transfer is particularly preferably performed in the final cold rolling step of a normal aluminum plate.
- Rolling for transfer is preferably performed in 1 to 3 passes, and the rolling reduction of each is preferably 3 to 8%.
- a method of spraying predetermined alumina particles is used as a method for obtaining a transfer roll having unevenness on the surface used for transferring unevenness, and the air blast method is particularly preferable.
- the air pressure in the air blast method is preferably 9.8 ⁇ 10 4 to 9.8 ⁇ 10 5 Pa, and more preferably 1.96 ⁇ 10 5 to 4.90 ⁇ 10 5 Pa.
- the grid used in the air blast method is not particularly limited as long as it is alumina particles having a predetermined particle size. If alumina particles that are hard on the grid and have sharp corners are used, it is easy to form deep and uniform irregularities on the surface of the transfer roll.
- the average particle size of the alumina particles is 50 to 150 ⁇ m, preferably 60 to 130 ⁇ m, and more preferably 70 to 90 ⁇ m. Since the surface roughness of a size sufficient as a transfer roll is obtained within the above range, the surface roughness of an aluminum plate provided with irregularities using this transfer roll is sufficiently increased. Also, the number of pits can be increased sufficiently.
- the injection is preferably performed 2 to 5 times, more preferably 2 times. If the injection is performed twice, the unevenness formed by unevenness formed by the first injection can be scraped off by the second injection, so that it is locally applied to the surface of the aluminum plate provided with the unevenness using the obtained rolling roll. It is difficult to form deep recesses. As a result, the developability (sensitivity) of the lithographic printing plate is excellent.
- the injection angle in the air blast method is preferably 60 to 120 °, more preferably 80 to 100 ° with respect to the injection surface (roll surface).
- the air blasting method After performing the air blasting method, it is preferable to perform polishing until the average surface roughness (Ra) is reduced by 10 to 40% from the value after air blasting before performing the plating treatment described later.
- Ra average surface roughness
- the height of the convex portions on the surface of the transfer roll can be made uniform, and as a result, locally deep portions are not formed on the surface of the aluminum plate provided with irregularities using this transfer roll. As a result, the developability (sensitivity) of the planographic printing plate is particularly excellent.
- the average surface roughness (Ra) of the surface of the transfer roll is preferably 0.4 to 1.0 ⁇ m, and more preferably 0.6 to 0.9 ⁇ m.
- the number of ridges on the surface of the transfer roll is preferably 1000 to 40000 pieces / mm 2 , more preferably 2000 to 10,000 pieces / mm 2 . If the number of peaks is too small, the water retention of the lithographic printing plate support and the adhesion to the image recording layer are poor. If the water retention is inferior, the halftone dot portion tends to become dirty when a planographic printing plate is used.
- the material of the transfer roll is not particularly limited, and for example, a known material for a rolling roll can be used.
- a steel roll it is preferable to use a steel roll.
- a roll made by casting is preferable.
- preferred roll material compositions are: C: 0.07 to 6 mass%, Si: 0.2 to 1 mass%, Mn: 0.15 to 1 mass%, P: 0.03 mass% or less, S: 0.03% by mass or less, Cr: 2.5 to 12% by mass, Mo: 0.05 to 1.1% by mass, Cu: 0.5% by mass or less, V: 0.5% by mass or less, balance: iron And inevitable impurities.
- tool steel high-speed steel (SKH), high carbon chromium bearing steel (SUJ), and forged steel containing carbon, chromium, molybdenum, and vanadium as alloy elements are generally used as rolling rolls.
- high chromium alloy cast iron containing about 10 to 20% by mass of chromium can also be used.
- the hardness after quenching and tempering is preferably 80 to 100 in terms of Hs. Tempering is preferably performed at low temperature.
- the diameter of the roll is preferably 200 to 1000 mm.
- the roll surface length is preferably 1000 to 4000 mm. It is preferable that the transfer roll formed with irregularities by the air blast method is subjected to hardening treatment such as quenching and hard chrome plating after washing. This improves wear resistance and prolongs life.
- hard chrome plating is particularly preferable.
- the hard chrome plating can be performed by electroplating using a conventionally known CrO 3 —SO 4 bath, CrO 3 —SO 4 —fluoride bath, or the like as an industrial chrome plating method.
- the thickness of the hard chrome plating film is preferably 3 to 15 ⁇ m, and more preferably 5 to 10 ⁇ m. Within the above range, the plating film part is peeled off from the boundary between the roll surface substrate and the plating film, plating peeling is unlikely to occur, and the effect of improving wear resistance is sufficient.
- the thickness of the hard chrome plating film can be adjusted by adjusting the plating time.
- Methods for obtaining rolling rolls having irregularities on the surface are disclosed in, for example, JP-A-60-36195, JP-A-60-203495, JP-A-55-74898, JP-A-62-111792, and JP-A-2002-251005. The described method may be used.
- the aluminum plate on which the concavo-convex pattern is formed using a rolling roll having concavo-convex on the surface has a structure having concavo-convex of 10 to 100 ⁇ m pitch on the surface.
- the arithmetic average roughness (Ra) is preferably 0.4 to 1.5 ⁇ m, and more preferably 0.4 to 0.8 ⁇ m.
- Rmax is preferably 1 to 6 ⁇ m, more preferably 2 to 5 ⁇ m.
- RSm is preferably 5 to 150 ⁇ m, more preferably 10 to 100 ⁇ m.
- the number of concave portions on the surface is preferably 200 to 20000 / mm 2 .
- the aluminum plate with the irregularities formed on the surface by transferring the irregular pattern is a continuous belt-like sheet material or plate material. That is, it may be an aluminum web or a sheet-like sheet cut to a size corresponding to a planographic printing plate material shipped as a product.
- Scratches on the surface of the aluminum plate may become defects when processed into a lithographic printing plate support, so it is possible to generate scratches at the stage prior to the surface treatment process for making a lithographic printing plate support It is necessary to suppress as much as possible.
- the package has a stable form and is hardly damaged during transportation.
- the package of aluminum is, for example, a hard board and felt placed on an iron pallet, cardboard donut plates are applied to both ends of the product, the whole is wrapped with a polytube, and a wooden donut is inserted into the inner diameter of the coil. Apply a felt to the outer periphery of the coil, squeeze it with band iron, and display on the outer periphery.
- a polyethylene film can be used as the packaging material, and needle felt and hard board can be used as the cushioning material.
- the thickness of the aluminum plate used in the present invention is about 0.1 to 0.6 mm, preferably 0.15 to 0.4 mm, and more preferably 0.2 to 0.3 mm. This thickness can be appropriately changed according to the size of the printing press, the size of the lithographic printing plate, the user's desires, and the like.
- a roughening process is performed.
- the roughening method include a mechanical method and a method of etching by electrolysis.
- AC electrolytic surface roughening treatment in an electrolytic solution mainly composed of hydrochloric acid is preferable, but mechanical surface roughening treatment and electrolytic surface roughening treatment mainly composed of nitric acid may be performed prior to this.
- the mechanical roughening method is not particularly limited, but a brush polishing method and a honing polishing method are preferable.
- the roughening by the brush polishing method is performed, for example, by rotating a rotating brush using brush bristles having a diameter of 0.2 to 0.8 mm, and for example, volcanic ash particles having a particle diameter of 10 to 100 ⁇ m on water. While supplying the uniformly dispersed slurry, the brush can be pressed.
- For roughening by honing for example, volcanic ash particles having a particle size of 10 to 100 ⁇ m are uniformly dispersed in water, sprayed by applying pressure from a nozzle, and subjected to roughening by colliding with the surface of the support at an angle. Can do.
- roughening can be performed by transferring a rough surface pattern of the sheet by applying pressure.
- the acid include sulfuric acid, persulfuric acid, hydrofluoric acid, phosphoric acid, nitric acid, hydrochloric acid, and the like.
- the base include sodium hydroxide and potassium hydroxide. Among these, it is preferable to use an aqueous alkali solution such as sodium hydroxide.
- the amount of aluminum dissolved on the surface is preferably 0.5 to 5 g / m 2 .
- the electrolytic surface-roughening treatment mainly composed of nitric acid can be generally performed by applying a voltage in the range of 1 to 50 volts, but is preferably selected from the range of 10 to 30 volts.
- the current density may be in the range of 10 ⁇ 200A / dm 2, preferably selected from the range of 20 ⁇ 100A / dm 2.
- the electrical quantity may be in the range of 100 ⁇ 5000C / dm 2, preferably selected from the range of 100 ⁇ 2000C / dm 2.
- the temperature at which the electrochemical surface roughening method is performed can be in the range of 10 to 50 ° C., but is preferably selected from the range of 15 to 45 ° C.
- the concentration of nitric acid in the electrolytic solution is preferably 0.1 to 5% by mass. If necessary, nitrates, chlorides, amines, aldehydes, phosphoric acid, chromic acid, boric acid, acetic acid, oxalic acid, aluminum ions, and the like can be added to the electrolytic solution.
- the electrolytic surface-roughening treatment mainly composed of nitric acid
- it is preferably immersed in an acid or alkali aqueous solution in order to remove aluminum scraps on the surface.
- the acid include sulfuric acid, persulfuric acid, hydrofluoric acid, phosphoric acid, nitric acid, hydrochloric acid, and the like.
- the base include sodium hydroxide and potassium hydroxide.
- it is preferable to use an alkaline aqueous solution.
- the amount of aluminum dissolved on the surface is preferably 0.5 to 5 g / m 2 .
- the hydrochloric acid concentration is preferably 5 to 20 g / L, more preferably 6 to 15 g / L.
- the current density is preferably 15 to 120 A / dm 2 , more preferably 20 to 90 A / dm 2 .
- the quantity of electricity is preferably 400 ⁇ 2000C / dm 2, more preferably 500 ⁇ 1200C / dm 2.
- the frequency is preferably in the range of 40 to 150 Hz.
- the temperature of the electrolytic solution can be in the range of 10 to 50 ° C., but is preferably selected from the range of 15 to 45 ° C.
- nitrates, chlorides, amines, aldehydes, phosphoric acid, chromic acid, boric acid, acetic acid, oxalic acid, aluminum ions, and the like can be added to the electrolytic solution.
- the electrolytic surface roughening treatment is performed in the electrolytic solution mainly containing hydrochloric acid, it is preferably immersed in an aqueous solution of acid or alkali in order to remove aluminum scraps on the surface.
- the acid include sulfuric acid, persulfuric acid, hydrofluoric acid, phosphoric acid, nitric acid, hydrochloric acid, and the like.
- the base include sodium hydroxide and potassium hydroxide.
- the amount of aluminum dissolved on the surface is preferably 0.5 to 2 g / m 2 .
- neutralization treatment is performed by immersion in an acid such as phosphoric acid, nitric acid, sulfuric acid, chromic acid or a mixed acid thereof.
- the arithmetic average roughness (Ra) of the surface on the image forming layer side of the obtained aluminum support is preferably from 0.3 to 0.7 ⁇ m, more preferably from 0.4 to 0.6 ⁇ m.
- the surface roughness of the support can be controlled by a combination of hydrochloric acid concentration, current density, and quantity of electricity in the roughening treatment.
- an anodizing treatment is performed to form an anodized film.
- the anodizing method according to the present invention is preferably carried out using sulfuric acid or an electrolytic solution mainly composed of sulfuric acid as the electrolytic solution.
- the concentration of sulfuric acid is preferably 5 to 50% by mass, particularly preferably 10 to 35% by mass.
- the temperature is preferably 10 to 50 ° C.
- the treatment voltage is preferably 18V or more, and more preferably 20V or more.
- the current density is preferably 1 to 30 A / dm 2 . Quantity of electricity is preferably 200 ⁇ 600C / dm 2.
- the amount of the anodized coating formed is preferably 2 to 6 g / m 2 , and preferably 3 to 5 g / m 2 .
- the anodic oxidation coating amount is obtained by, for example, immersing an aluminum plate in a chromic phosphate solution (produced by dissolving 35% phosphoric acid solution: 35 ml, chromium oxide (IV): 20 g in 1 L of water), dissolving the oxide coating, It is obtained from mass change measurement before and after dissolution of the coating on the plate.
- Micropores are generated in the anodic oxide film, and the density of the micropores is preferably 400 to 700 / ⁇ m 2, more preferably 400 to 600 / ⁇ m 2 .
- the anodized support may be sealed as necessary. These sealing treatments can be performed using known methods such as hot water treatment, boiling water treatment, water vapor treatment, sodium silicate treatment, dichromate aqueous solution treatment, nitrite treatment, and ammonium acetate treatment. Moreover, the well-known process by hydrophilic polymer aqueous solution, such as polyvinylphosphonic acid, polyacrylic acid, and polyacrylate, can also be performed. Further, a known undercoating process may be performed.
- the photosensitive layer contains, as a binder resin, a novolac resin containing a phenol part in a mass ratio of 20% by mass or more and 100% by mass or less, and a polyvinylphenol polymer, and the content of the novolac resin and the polyvinylphenol polymer.
- Ratio mass of novolac resin: mass of polyvinylphenol polymer is 7: 3 to 3: 7.
- the novolak resin is a resin obtained by condensing a phenol with an aldehyde, and the photosensitive layer contains a novolak resin containing a phenol part in a mass ratio of 20% by mass to 100% by mass.
- the phenol part is contained in a mass ratio of 20% by mass or more and 100% by mass or less.
- the ratio of the mass of repeating units formed by phenol to the mass of the whole resin Is 20 or more and 100 or less.
- phenols used for the novolak resin in addition to phenol, m-cresol, p-cresol, m- / p-mixed cresol, phenol and cresol (m-, p-, or m- / p-mixed) Good)), pyrogallol, acrylamide having a phenol group, methacrylamide, acrylic acid ester, methacrylic acid ester, or vinylphenol.
- Substituted phenols such as isopropylphenol, t-butylphenol, t-amylphenol, hexylphenol, cyclohexylphenol, 3-methyl-4-chloro-6-t-butylphenol, isopropylcresol, t-butylcresol, t-amylresole Is mentioned.
- t-butylphenol and t-butylcresol can also be used.
- aldehydes include aliphatic and aromatic aldehydes such as formaldehyde, acetaldehyde, acrolein, and crotonaldehyde. Preferred is formaldehyde or acetaldehyde, and most preferred is formaldehyde.
- phenol-formaldehyde, phenol / cresol (m-, p-, o-, m- / p-mix, m- / o-mix and o- / p-mix may be used. .) Mixed-formaldehyde.
- These novolak resins preferably have a weight average molecular weight of 1,000 or more and a number average molecular weight of 200 or more. More preferably, the weight average molecular weight is 1500 to 300,000, the number average molecular weight is 300 to 250,000, and the dispersity (weight average molecular weight / number average molecular weight) is 1.1 to 10. Particularly preferred are those having a weight average molecular weight of 2000 to 10,000, a number average molecular weight of 500 to 10,000, and a dispersity (weight average molecular weight / number average molecular weight) of 1.1 to 5.
- the weight average molecular weight in this invention employ
- GPC gel permeation chromatograph
- the photosensitive layer further contains a polyvinylphenol polymer as a binder.
- a polyvinylphenol polymer examples include a homopolymer or a copolymer of vinylphenol.
- the vinylphenol homopolymer a p-vinylphenol homopolymer which is easily available on the market can be preferably used.
- the copolymer include p-vinylphenol and 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, styrene, methyl methacrylate, butyl acrylate, hydroxyphenylmaleimide, and the like.
- the molecular weight of the vinylphenol homopolymer or copolymer those having a weight average molecular weight of preferably 1500 to 50,000 and a number average molecular weight of preferably 1,000 to 10,000 can be preferably used.
- the mass ratio (ratio of content) of the novolak resin / vinylphenol homopolymer or copolymer containing the phenol part in a mass ratio of 20% by mass to 100% by mass is 7 from the viewpoint of solvent resistance and printing durability. / 3 to 3/7.
- the total content of the novolac resin and the polyvinylphenol polymer is preferably 40% by mass to 90% by mass, and particularly preferably 50% by mass to 80% by mass with respect to the photosensitive layer.
- the photosensitive layer contains a specific novolak resin and a polyvinylphenol polymer as a binder, and a lithographic printing excellent in solvent resistance and printing durability by containing a crosslinking agent in a specific ratio with respect to the binder.
- a plate material is obtained. The reason is not clear, but is presumed as follows.
- the state of the crosslinked structure of the polymer in the photosensitive layer greatly affects the solvent resistance and printing durability of the photosensitive layer in the image area after plate making.
- a novolac resin containing a specific amount of phenol having a good compatibility and a polyvinyl phenol polymer are present in a complicatedly entangled state.
- a specific amount of the cross-linking agent defined in the present invention it is presumed that a specifically good three-dimensional cross-linked structure is formed.
- the very good solvent resistance and printing durability that the photosensitive layer having the constitution of the present invention develops cannot be obtained by crosslinking of a novolak resin alone or a polyvinylphenol polymer alone.
- a known novolak resin containing no phenol, a known alkali-soluble resin, or the like can be used in combination as long as the effects of the present invention are not impaired.
- a cross-linking agent used in the present invention that is, a cross-linking agent that cross-links with an alkali-soluble resin in the presence of an acid to reduce solubility in alkali include a resol resin, a phenol derivative described in JP 2000-35669 A, and methylol.
- melamine resin Group or a derivative of methylol group, melamine resin, benzoguanamine resin, glycoluril resin, furan resin, isocyanate, blocked isocyanate (isocyanate having a protecting group), etc., but melamine resin, methylol group or acetylated methylol group A cross-linking agent having Two or more of these may be used in combination.
- a melamine resin is particularly preferable.
- the melamine resin preferably used in the present invention is a methylol group that may be present in a mixture of a methylol melamine monomer that is an initial condensate of melamine and formaldehyde and a low-order condensate of melamine and formaldehyde that is formed by dehydration condensation of methylol melamine. It is a resin having a structure in which at least a part thereof is alkoxylated.
- the content of the crosslinking agent of the present invention is required to be 0.25 or more and 0.50 or less as a mass ratio of the crosslinking agent / binder resin from the viewpoint of solvent resistance and abrasion resistance.
- the infrared absorber used in the present invention preferably has a light absorption region in the infrared region of 700 nm or more, more preferably 750 to 1200 nm, and expresses light / heat conversion ability in light in this wavelength range. Specifically, various dyes or pigments that absorb light in this wavelength range and generate heat can be used.
- pigment commercially available pigments and known pigments described in literature (for example, “Dye Handbook” edited by Organic Synthetic Chemistry Association, published in 1970) can be used. Specific examples include azo dyes, metal complex azo dyes, pyrazolone azo dyes, anthraquinone dyes, phthalocyanine dyes, carbonium dyes, quinoneimine dyes, methine dyes, and cyanine dyes. In the present invention, among these pigments or dyes, those that absorb infrared light or near infrared light are particularly preferred because they are suitable for use in lasers that emit infrared light or near infrared light.
- Examples of such dyes that absorb infrared light or near infrared light include, for example, JP-A-58-125246, JP-A-59-84356, JP-A-59-202829, and JP-A-60-78787.
- Methine dyes described in JP-A-58-173696, JP-A-58-181690, JP-A-58-194595, etc. JP-A-58-112793
- Examples thereof include squarylium dyes described in 58-112792, and cyanine dyes described in British Patent 434,875. Further, a near-infrared absorption sensitizer described in US Pat. No. 5,156,938 is also preferably used as the dye, and substituted arylbenzo (thio) pyrylium described in US Pat. No. 3,881,924. Salt, trimethine thiapyrylium salt described in JP-A-57-142645 (US Pat. No.
- cyanine dyes particularly preferred are cyanine dyes, phthalocyanine dyes, oxonol dyes, squarylium dyes, pyrylium salts, thiopyrylium dyes, and nickel thiolate complexes.
- squarylium dye As the squarylium dye, a squarylium dye described in US Pat. No. 5,763,134 and a squarylium dye described in WO2007 / 083542 can be preferably used.
- the content of the infrared absorbing dye necessary for obtaining an appropriate sensitivity as a lithographic printing plate material is preferably 0.1 to 20% by mass, more preferably 0.5 to 10% by mass, based on the total solid content of the photosensitive layer. Particularly preferred is 1 to 5% by mass.
- pigments examples include commercially available pigment and color index (CI) manuals, “Latest Pigment Handbook” (edited by the Japan Pigment Technology Association, published in 1977), “Latest Pigment Applied Technology” (published by CMC, published in 1986), “Printing” The pigments described in "Ink Technology” (CMC Publishing, 1984) can be used.
- CI pigment and color index
- pigments include black pigments, yellow pigments, orange pigments, brown pigments, red pigments, purple pigments, blue pigments, green pigments, fluorescent pigments, metal powder pigments, and other polymer-bonded dyes.
- quinophthalone pigments, dyed lake pigments, azine pigments, nitroso pigments, nitro pigments, natural pigments, fluorescent pigments, inorganic pigments, carbon black, and the like can be used.
- the particle diameter of the pigment is preferably in the range of 0.01 to 5 ⁇ m, more preferably in the range of 0.03 to 1 ⁇ m, and particularly preferably in the range of 0.05 to 0.5 ⁇ m.
- the pigment particle size is preferably 0.01 ⁇ m or more from the viewpoint of stability of the dispersion in the photosensitive layer coating solution, and 5 ⁇ m or less is preferable from the viewpoint of uniformity of the photosensitive layer.
- the dispersion method a known dispersion technique used for ink production, toner production, or the like can be used.
- the disperser include an ultrasonic disperser, a sand mill, an attritor, a pearl mill, a super mill, a ball mill, an impeller, a disperser, a KD mill, a colloid mill, a dynatron, a three-roll mill, and a pressure kneader. Details are described in "Latest Pigment Applied Technology" (CMC Publishing, 1986).
- the content of the infrared absorbing pigment necessary for obtaining an appropriate sensitivity as a lithographic printing plate material is preferably 0.1 to 10% by mass, more preferably 0.5 to 5% by mass, based on the total solid content of the photosensitive layer. %.
- the above dyes and pigments can be used in combination of two or more.
- Examples of the acid generator used in the present invention include known onium salts such as ammonium salts, phosphonium salts, iodonium salts, sulfonium salts, and organic halogen compounds. In particular, trihaloalkyl compounds and diazonium salt compounds are preferably used in that high sensitivity can be obtained. Moreover, you may use together the compound which generate
- trihaloalkyl compound for example, trihalomethyl-s-triazine compounds, oxadiazole compounds, tribromomethylsulfonyl compounds and the like described in US Pat. No. 4,239,850 are preferable.
- an organic halogen compound is preferable as an acid generator from the viewpoints of sensitivity in image formation by infrared exposure and storage stability of a lithographic printing plate material.
- the organic halogen compound triazines having a halogen-substituted alkyl group and oxadiazoles having a halogen-substituted alkyl group are preferable, and s-triazines having a halogen-substituted alkyl group are particularly preferable.
- oxadiazoles having a halogen-substituted alkyl group include JP 54-74728, JP 55-24113, JP 55-77742, JP 60-3626, and JP Examples include 2-halomethyl-1,3,4-oxadiazole compounds described in JP-A-60-138539. Preferred examples of the 2-halomethyl-1,3,4-oxadiazole acid generator are given below.
- s-triazines having a halogen-substituted alkyl group compounds represented by the following general formula (TZN) are preferable.
- R represents an alkyl group, a halogen-substituted alkyl group, a phenyl vinylene group or an aryl group (for example, a phenyl group or a naphthyl group) which may be substituted with an alkoxy group, or a substituted product thereof, and
- X represents Represents a halogen atom.
- s-triazine acid generator compounds represented by the general formula (TZN) are shown below.
- the acid generator used in the present invention is particularly preferably a triazine compound from the viewpoints of sensitivity, solvent resistance, and abrasion resistance.
- the content of the acid generator is preferably in the range of 1 to 30% by mass, particularly preferably in the range of 3 to 10% by mass, based on the total solid content of the photosensitive layer.
- the content of the acid generator is 1% by mass or more, it is preferable from the viewpoints of sensitivity, solvent resistance, and abrasion resistance due to generation of an acid necessary for crosslinking the binder resin and the crosslinking agent.
- it is 30% by mass or less, it is preferable from the viewpoints of solvent resistance and wear resistance, which are also a relative ratio between the binder resin and the crosslinking agent.
- ⁇ Other components> ⁇ Visible paint>
- Examples of visible paints include salt-forming organic dyes, and examples of suitable dyes include oil-soluble dyes and basic dyes.
- Color tone changes includes both a change from colorless to colored color tone and a change from colored to colorless or different colored tone.
- Preferred dyes are those that change color tone by forming a salt with an acid.
- Victoria Pure Blue BOH Hodogaya Chemical Co., Ltd.
- Oil Blue # 603 Orient Chemical Co., Ltd.
- Patent Pure Blue Silicone (Sumitomo Sangoku Chemical Co., Ltd.)
- Crystal Violet Brilliant Green
- Ethyl Violet Methyl Violet
- Methyl Triphenylmethane series represented by green, erythrosin B, pacific fuchsin, malachite green, oil red, m-cresol purple, rhodamine B, auramine
- 4-p-diethylaminophenyliminonaphthoquinone cyano-p-diethylaminophenylacetanilide, etc.
- examples of the color changing agent that changes from colorless to colored include leuco dyes and, for example, triphenylamine, diphenylamine, o-chloroaniline, 1,2,3-triphenylguanidine, naphthylamine, diaminodiphenylmethane, p, p'-bis.
- These visible paints can be added in an amount of preferably 0.01 to 10% by mass, more preferably 0.1 to 3% by mass, based on the total solid content of the photosensitive layer.
- ⁇ Colorant> As the colorant, conventionally known ones including commercially available ones can be suitably used. Examples include those described in the revised new edition “Pigment Handbook”, edited by Japan Pigment Technology Association (Seikodo Shinkosha), Color Index Handbook, and the like.
- pigments include black pigments, yellow pigments, red pigments, brown pigments, purple pigments, blue pigments, green pigments, fluorescent pigments, and metal powder pigments.
- inorganic pigments titanium dioxide, carbon black, graphite, zinc oxide, Prussian blue, cadmium sulfide, iron oxide, and lead, zinc, barium and calcium chromates
- organic pigments azo-based, thioindigo
- Anthraquinone, anthanthrone, and triphendioxazine pigments vat dye pigments, phthalocyanine pigments and derivatives thereof, quinacridone pigments, and the like.
- a cyanine dye having substantially no absorption in the infrared region can be preferably used as a colorant.
- the photosensitive layer of the present invention is described in JP-A Nos. 62-251740 and 3-208514 in order to improve the coating properties and to increase the stability of processing with respect to development conditions.
- Nonionic surfactants such as these, amphoteric surfactants such as those described in JP-A-59-121044 and JP-A-4-13149, and siloxane compounds as described in EP950517 Fluorosurfactants described in JP-A-62-170950, JP-A-11-288093, and Japanese Patent Application No. 2001-247351 can be added.
- nonionic surfactant examples include sorbitan tristearate, sorbitan monopalmitate, sorbitan trioleate, stearic acid monoglyceride, polyoxyethylene nonylphenyl ether and the like.
- amphoteric activators include alkyldi (aminoethyl) glycine, alkylpolyaminoethylglycine hydrochloride, 2-alkyl-N-carboxyethyl-N-hydroxyethylimidazolinium betaine and N-tetradecyl-N, N-betaine. Type (for example, trade name “Amorgen K” manufactured by Daiichi Kogyo Co., Ltd.).
- the siloxane compound is preferably a block copolymer of dimethylsiloxane and polyalkylene oxide.
- Specific examples include DBE-224, DBE-621, DBE-712, DBP-732, DBP-534, manufactured by Chisso Corporation.
- Examples thereof include polyalkylene oxide-modified silicones such as Tego Glide 100 manufactured by Tego, Germany.
- the amount of the surfactant added relative to the total solid content of the photosensitive layer is preferably 0.01 to 15% by mass, more preferably 0.1 to 5% by mass, and still more preferably 0.05 to 0.5% by mass.
- Solvents used in preparing the coating solution for the photosensitive layer of the present invention include, for example, alcohols: methanol, ethanol, propanol, isopropanol, sec-butanol, isobutanol, n-hexanol, benzyl alcohol, diethylene glycol, triethylene glycol, and the like.
- the prepared coating composition (image forming layer coating solution) can be coated on a support by a conventionally known method and dried to produce a photopolymerizable photosensitive lithographic printing plate material.
- coating methods for the coating liquid include air doctor coater method, blade coater method, wire bar method, knife coater method, dip coater method, reverse roll coater method, gravure coater method, cast coating method, curtain coater method and extrusion coater method. Can be mentioned.
- the drying temperature of the photosensitive layer is preferably in the range of 60 to 160 ° C, more preferably in the range of 80 to 140 ° C, and particularly preferably in the range of 90 to 120 ° C.
- the dry coating amount of the photosensitive layer, sensitivity, printing durability, in view of cost preferably 0.5 ⁇ 4g / m 2, more preferably 1.0 ⁇ 2.5g / m 2, 1.2 ⁇ 2 0.0 g / m 2 is more preferable.
- 0.5 g / m 2 or more is preferable from the viewpoint of printing durability, and 4 g / m 2 or less is preferable from the viewpoint of sensitivity, and also from the viewpoint of photosensitive layer cost.
- the photosensitive layer weight (g / m 2 ) of the lithographic printing plate material of the present invention preferably satisfies the relationship of the following formula (1) between the support surface roughness: Ra ( ⁇ m). It is.
- Formula (1) Drying amount of photosensitive layer—Ra ⁇ 1.0
- the photosensitive layer can uniformly cover the unevenness of the support, and the image area when the image is formed is in contact with the support surface (the average unevenness of the unevenness).
- a proper projection amount from a plane assumed in FIG. When the image portion has an appropriate protrusion amount, this protrusion amount can be regarded as a wear margin amount until the support surface of the image portion is exposed, and the wear resistance of the image portion becomes better.
- the lithographic printing plate material of the present invention forms a latent image by image exposure, then crosslinks the area where the latent image is formed by heat treatment to form an image, and further removes the unexposed photosensitive layer by development processing. Then, it is gummed as necessary to form a lithographic printing plate.
- the lithographic printing plate material of the present invention is preferably subjected to image exposure using a light source having a wavelength of 700 nm or more.
- the light source include a semiconductor laser, a He—Ne laser, a YAG laser, and a carbon dioxide gas laser.
- the output is suitably 50 mW or more, preferably 100 mW or more.
- ⁇ Laser scanning methods include cylindrical outer surface scanning, cylindrical inner surface scanning, and planar scanning.
- cylindrical outer surface scanning laser exposure is performed while rotating a drum around which a recording material is wound, and the rotation of the drum is used as main scanning, and the movement of laser light is used as sub scanning.
- cylindrical inner surface scanning a recording material is fixed to the inner surface of the drum, a laser beam is irradiated from the inside, and a main scanning is performed in the circumferential direction by rotating a part or all of the optical system. Sub scanning is performed in the axial direction by linearly moving all of them in parallel with the drum axis.
- a laser beam main scan is performed by combining a polygon mirror, a galvanometer mirror, and an f ⁇ lens, and a sub-scan is performed by moving a recording medium.
- Cylindrical outer surface scanning and cylindrical inner surface scanning are easier to increase the accuracy of the optical system and are suitable for high-density recording.
- the lithographic printing plate material after image exposure is subjected to heat treatment immediately after exposure or after an appropriate time has elapsed.
- the heat treatment is generally performed using a device that transports the lithographic printing plate material at a constant speed in a heating furnace that can be set to a constant temperature.
- the heat treatment conditions can be appropriately adjusted by setting the temperature in the furnace and the conveyance speed, that is, setting the residence time in the furnace.
- the setting of the reach temperature range of the lithographic printing plate material plate in the heat treatment is more important than the temperature setting in the furnace, and the planographic printing plate material of the present invention is preferably 130 ° C. as the plate surface temperature of the lithographic printing plate material.
- the planographic printing plate material of the present invention is preferably 130 ° C. as the plate surface temperature of the lithographic printing plate material.
- an apparatus consisting of a plurality of zones in which the heating furnace can individually set the temperature can be preferably used for the heat treatment.
- a temperature setting for a plurality of zones a setting in which the temperature setting of the zone through which the planographic printing plate material passes last is the lowest is set, and in addition, the temperature setting of the zone through which the planographic printing plate material passes first is the highest.
- the time until the lithographic printing plate material reaches an appropriate temperature from room temperature to the plate surface temperature can be shortened, and the total time of the heat treatment can be shortened, that is, the productivity of the plate making can be improved. Is possible.
- the temperature setting of the zone through which the lithographic printing plate material finally passes is preferably 5 ° C. or more lower than the maximum set temperature of the previous zone, and more preferably 10 ° C. or more lower.
- the fact that the temperature setting of the zone through which the lithographic printing plate material finally passes can lower the temperature setting of the lithographic printing plate material from the heat treatment to the development treatment is also advantageous for suppressing deformation (so-called ripple).
- the lithographic printing plate material after the heat treatment is subjected to a development treatment immediately after the heat treatment or after an appropriate time has elapsed.
- an automatic developing machine is used for the development processing.
- an aqueous alkaline developer is preferable.
- the aqueous alkaline developer include sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, sodium metasilicate, potassium metasilicate, dibasic sodium phosphate, and tertiary phosphorus.
- the concentration of the alkali metal salt which includes an aqueous solution of an alkali metal salt such as sodium acid, is preferably 0.05 to 20% by mass, more preferably 0.1 to 10% by mass.
- an anionic surfactant, an amphoteric surfactant, a chelating agent, an organic solvent such as alcohol, and the like can be added to the developer.
- the organic solvent propylene glycol, ethylene glycol monophenyl ether, benzine alcohol, n-propyl alcohol and the like are useful.
- the temperature of the developer is preferably in the range of 15 to 40 ° C, preferably 25 to 35 ° C.
- the immersion time is preferably in the range of 1 second to 2 minutes, particularly preferably 10 to 45 seconds.
- the surface of the photosensitive layer can be rubbed with a brush, molton or the like during development. After the development is completed, washing with water and / or treatment with an aqueous desensitizing agent, so-called gum treatment is performed.
- water-based desensitizing agent examples include aqueous solutions such as water-soluble natural polymers such as gum arabic, dextrin, and carboxymethyl cellulose, and water-soluble synthetic polymers such as polyvinyl alcohol, polyvinyl pyrrolidone, and polyacrylic acid. .
- lithographic printing plate material is subjected to development processing (and treatment with a desensitizing agent), and then dried and used as a lithographic printing plate for printing.
- Example 1 ⁇ Production of support> An aluminum plate (material 1050, tempered H16) having a thickness of 0.30 mm was immersed in a 1% by mass sodium hydroxide aqueous solution at 50 ° C., dissolved so that the dissolved amount became 2 g / m 2 , and washed with water. Then, it was immersed in 0.1 mass% hydrochloric acid aqueous solution at 25 ° C. for 30 seconds, neutralized, and then washed with water.
- Table 1 below shows the peak current density and the amount of electricity at the time of anodic use of this aluminum plate by using a sinusoidal alternating current with an electrolyte containing hydrochloric acid 10 g / L, acetic acid 10 g / L and aluminum 8 g / L.
- An electrolytic surface roughening treatment was performed so as to satisfy the conditions.
- the distance between the electrode and the sample surface at this time was 10 mm.
- electrolytic surface roughening After electrolytic surface roughening, it is immersed in a 10% by mass phosphoric acid aqueous solution maintained at 50 ° C. and etched so that the dissolution amount including the smut of the roughened surface becomes 0.7 g / m 2. Then, it was washed with water, then immersed in a 10% aqueous sulfuric acid solution maintained at 25 ° C. for 10 seconds, neutralized, and then washed with water. Next, an anodizing treatment was performed in a 20% sulfuric acid aqueous solution at 25 ° C. under a constant current condition of 10 A / dm 2 so that the amount of the anodized layer was 3.0 g / m 2, and further washed with water and dried. Supports 1 to 5 were obtained.
- the surface roughness of the roughened surface of the obtained support was measured using a stylus having a tip diameter of 2 ⁇ m. The measurement results are shown in the table.
- Xylenol / m-cresol / p-cresol 20/45/35, Mw: 37000 8).
- Phenol / m-cresol / p-cresol 5/57/38, Mw: 10000 ⁇ binder B: other than A> 1.
- p-vinylphenol / HEMA 50/50, Mw: 10,000 4).
- HyPMA / AN / MMA 40/30/30, Mw: 22000 5).
- HyPMI / AN / MMA 26/37/37, Mw: 14000 6).
- HyPMA / MAN / MMA / BzMA 34/20/36/10, Mw: 26000
- HEMA 2-hydroxyethyl acrylate
- HyPMA hydroxyphenylmethacrylamide
- AN Acrylonitrile
- MMA methyl methacrylate
- HyPMI hydroxyphenylmaleimide
- MAN methacrylonitrile
- BzMA benzyl methacrylate
- Methylated melamine resin Cymel 303 (manufactured by Nippon Cytec Industries, approx. 60% monomer) 2.
- Methylated melamine resin Nicalac MW-390 (manufactured by Sanwa Chemical Co., Ltd., monomer 96% or more) 3.
- Resole resin BKS-5928 (manufactured by Union Carbide) 4. 2,6-Dihydroxymethyl-4-methylphenol
- Phthalocyanine pigment dispersion PGM (propylene glycol monomethyl ether) dispersion with a solid content of 35% by mass
- PGM propylene glycol monomethyl ether
- Fluorosurfactant, MegaFuck F-177 manufactured by DIC Corporation
- Fluorosurfactant, PF-6320 manufactured by OMNOVA
- ⁇ Preparation of planographic printing plate materials 106-144> Each photosensitive layer coating solution is applied to the roughened surface of the support 3 using a wire bar so that the dry weight is 1.6 g / m 2, and 60 ° C. in a warm air circulating dryer at 80 ° C.
- the lithographic printing plate materials 106 to 144 were obtained by holding for 2 seconds and drying.
- the plate surface glossiness of each obtained lithographic printing plate material was measured, and the results are shown in Table 8.
- ⁇ Image exposure> The obtained lithographic printing plate material was used with a commercial CTP setter (Dainippon Screen Mfg. Co., Ltd., PTR-4300) equipped with a semiconductor laser head, with a drum rotation speed of 1000 rpm and a laser output in increments of 40% to 5%.
- the image exposure was equivalent to 175 lines at a resolution of 2400 dpi (dpi represents the number of dots per inch, that is, 2.54 cm) while changing until 100%.
- the exposed image includes a 50% halftone dot image and a solid image.
- the laser output set by exposure corresponds to 60.4 mJ / cm 2 to 160.4 mJ / cm 2 .
- ⁇ Post-exposure heat treatment> The lithographic printing plate material was heat-treated immediately after exposure (within 5 minutes). For the heat treatment, Quartz Supreme Pre-bake Oven (manufactured by Glunz & Jensen) was used. The heat treatment conditions were adjusted so that the set temperature was 275 F (135.0 ° C.) and the residence time was 75 seconds. When the lithographic printing plate material to which the thermolabel was previously attached was heat-treated and it was confirmed how many times the plate surface temperature reached during the treatment, the plate surface temperature reached 135 ° C. The thermolabel used was displayed in increments of 5 ° C.
- lithographic printing plate material was developed immediately after the heat treatment (within 5 minutes). Development processing was performed using an automatic developer: Raptor 85T (manufactured by Glunz & Jensen) using a developer having the following composition. The development conditions were adjusted so that the liquid temperature was 26 ° C. and the processing residence time was 25 seconds. The gum solution was replaced with tap water and no gum treatment was performed. Thus, an image was formed on the lithographic printing plate materials 106 to 144 to obtain a lithographic printing plate. Developer composition
- ⁇ Sensitivity evaluation> The actual halftone dot percentage of the 50% halftone dot image portion formed by changing the exposure output of the planographic printing plate materials 106 to 144 was measured using iCPlate2 (manufactured by X-Rite), and the halftone dot change with respect to the exposure energy. Each curve was created. From this curve, the exposure energy at which the actual halftone dot percentage was 50% was determined, and the halftone dot sensitivity was taken as 50%. Table 9 shows the 50% halftone dot sensitivity of each planographic printing plate.
- Solid image portions of the lithographic printing plate materials 106 to 144 that were formed with an exposure output that is equal to or higher than the respective 50% halftone dot sensitivity and that were closest to the 50% halftone dot sensitivity were cut out and placed in PGM (propylene glycol monomethyl ether). The part was immersed and the solvent resistance of the image was examined.
- the total amount of the binder and the crosslinking agent was kept constant, and the crosslinking agent / binder ratio (a / b) and the ratio of the novolak resin and the polyvinylphenol polymer in the binder ( A: A sample obtained by changing B).
- the planographic printing plate material of the present invention has appropriate sensitivity under practical post-exposure heating conditions, and the formed image has very good solvent resistance.
- Example 2 ⁇ Preparation of planographic printing plates II-15 to II-42>
- the lithographic printing plates II-15 to II- as shown in Table 11 were prepared in the same manner as in Example 1 except that the post-exposure heating conditions of the post-exposure heat treatment were changed to those shown in Table 10. 42 was produced.
- the exposure condition was set to 135 mJ / cm 2 .
- Solvent resistance solvent resistance 1, solvent resistance 2 was evaluated in the same manner as in Example 1.
- Table 10 shows post-exposure heat treatment conditions A to H.
- the lithographic printing plate material of the present invention has good solvent resistance in a wide range of post-exposure heating conditions, and has a wide tolerance in heating conditions. From this point of view, it is preferable that the plate surface arrival temperature at the time of post-exposure heating is 130 ° C. or more, and from the viewpoint of the remaining development, the plate surface arrival temperature is preferably less than 155 ° C.
- the lithographic printing plate material of the comparative example shows almost no improvement in solvent resistance even under strong heating conditions that are levels that cause development residue.
- Example 3 Preparation of planographic printing plates III-9 to III-43>
- the lithographic printing plate materials 301 to 323 and 122 were used in the same manner as in Example 1 except that 6, 9, 12, 17, and 22 to 36 were used and the combinations of the support, coating solution, and amount were changed to the combinations shown in Table 12. ⁇ 136 were made.
- the following evaluation was performed using the lithographic printing plate materials 106, 109, 112, 117, 122 to 136, 301 to 323, and 122 to 136.
- the obtained lithographic printing plate material was subjected to exposure, post-exposure heating, and development in the same manner as in Example 1 to form an image.
- the formed images include 5% and 50% halftone dot images and solid images.
- the energy at the time of exposure was the energy of 50% halftone dot sensitivity of the lithographic printing plate material prepared using each coating liquid in Example 1.
- a commercially available gum solution was used during the development processing.
- the printing device uses DAIYA 1F-1 manufactured by Mitsubishi Heavy Industries, Ltd., the printing paper is OK top coat, the dampening solution is Astro Mark 3 (manufactured by Nikken Chemical Laboratories), 2% by mass, and the ink is TK High Unity Neo SOY. Red (manufactured by Toyo Ink) was used.
- plate reverse manufactured by Nikken Chemical Laboratories, which is a cleaner containing an abrasive, was used as a plate surface cleaner.
- the plate surface of the planographic printing plate on the printing press plate cylinder was wiped with a sponge soaked in a cleaner so that the plate surface was reciprocated twice, and then the plate surface was cleaned. The cleaner remaining on the printing plate was wiped off. Subsequently, 500 sheets were printed and the 500th printed material was evaluated in the same manner.
- the above operation was repeated to determine the number of cleanings at which the 5% halftone dot image started to be chipped and the number of cleanings at which the solid image began to be blurred.
- the obtained number of cleanings is shown in Table 12 as an index of wear resistance.
- the lithographic printing plate material of the present invention (obtained lithographic printing plate) has good wear resistance of the image area regardless of the support Ra and the amount of photosensitive layer. . Among them, particularly good wear resistance is obtained when the value of the applied amount -Ra is 1.0 or more.
- the lithographic printing plate material of the comparative example does not have good wear resistance even when the weight-Ra value is 1.0 or more.
- Example 4 ⁇ Preparation of lithographic printing plate materials> Lithographic printing plate materials 106, 109, 112, 117 were used. ⁇ Evaluation of chemical resistance (solvent resistance) during printing> Using each lithographic printing plate material (that is, lithographic printing plate) on which an image was formed in the same manner as in Example 3, the abrasion resistance during printing was evaluated by the following procedure.
- the printing apparatus uses DAIYA 1F-1 manufactured by Mitsubishi Heavy Industries, the printing paper is OK topcoat, the fountain solution is Astro Mark 3 (manufactured by Nikken Chemical Laboratories), 2% by mass, The ink used was TK High Unity Neo SOY Red (manufactured by Toyo Ink).
- the blanket surface of the printing machine was cleaned using a sponge soaked in a cleaner. Subsequently, 4,500 sheets were printed in a state where the cleaner on the blanket surface did not dry, and a total of 5000th printed materials were evaluated in the same manner.
- the above operation was repeated for every 5000 sheets to print up to 200,000 sheets, and the total number of printed sheets where unevenness occurred in a 50% halftone image and the total number of printed sheets where blurring occurred in a solid image were obtained. .
- the obtained number of printed sheets is shown in the table as an index of chemical resistance. If no unevenness or blurring of the image was observed after printing 200,000 sheets, it was described as 200,000 sheets or more.
- the lithographic printing plate material of the present invention has good solvent resistance, even under severe printing conditions where a chemical containing a large amount of solvent (cleaner) adheres to the plate surface. Have very good printing durability.
- Example 5 ⁇ Preparation of support 6> A support 6 was produced in the same manner as the support 3 produced in Example 1, except that an aluminum plate (material 1050, tempered H16) having a thickness of 0.20 mm was used.
- Post-exposure heating and development processing were performed using the two post-exposure heating conditions and development processing conditions shown in Table 14 below.
- Condition X The post-exposure heat treatment apparatus 1 and the automatic developing machine were directly connected so that the development treatment was performed immediately after the heat treatment.
- the conditions for the heat treatment were the conditions C in Example 2.
- the conveyance speed of the automatic developer was made to meet the conveyance speed of the heat treatment apparatus.
- the development temperature was adjusted so that the development conditions were the same as those for 26 ° C. and 25 seconds.
- the conditions for the heat treatment were the conditions K in Example 2.
- the conveyance speed of the automatic developer was made to meet the conveyance speed of the heat treatment apparatus.
- the development temperature was adjusted so that the development conditions were the same as those for 26 ° C. and 25 seconds.
- the solvent resistance was evaluated in the same manner as in Example 1.
- the planographic printing plate material of the present invention has good solvent resistance even when the thickness of the support is as thin as 0.20 mm. If the thickness of the support is reduced, there is a concern about deformation of the plate due to the heat history in the post-exposure heating / development process. It is understood that the deformation of the plate can be suppressed without deteriorating the solvent resistance.
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Abstract
Description
a:バインダー樹脂
b:架橋剤
c:赤外線吸収剤
d:酸発生剤
かつ、aがフェノール部を質量比で20質量%以上100質量%以下含有するノボラック樹脂と、ポリビニルフェノールポリマーとを含有し、該ノボラック樹脂と該ポリビニルフェノールポリマーとの含有量の割合(ノボラック樹脂の質量:ポリビニルフェノールポリマーの質量)が、7:3~3:7であり、かつ、b/aの質量比率が0.25以上、0.50以下であることを特徴とする平版印刷版材料。
式(1) 感光層の乾燥付量-Ra≧1.0
5.1~4のいずれか1項に記載の平版印刷版材料を画像様露光し、加熱処理を行い、次いで現像処理を行って得られる平版印刷版において、該加熱処理における処理条件が、平版印刷版材料の版面到達温度として、130℃以上、155℃以下であることを特徴とする平版印刷版。
aバインダー樹脂
b架橋剤
c赤外線吸収剤
d酸発生剤
かつ、aがフェノール部を質量比で20質量%以上100質量%以下含有するノボラック樹脂と、ポリビニルフェノールポリマーとを含有し、該ノボラック樹脂と該ポリビニルフェノールポリマーとの含有量の割合(ノボラック樹脂の質量:ポリビニルフェノールポリマーの質量)が、7:3~3:7であり、かつ、b/aの質量比率が0.25以上、0.50以下であることを特徴とする平版印刷版材料。
<支持体>
本発明に係るアルミニウム支持体には、アルミニウム板が使用され、アルミニウム板としては純アルミニウム板またはアルミニウム合金板どちらも用いることができる。
<感光層に用いられる素材>
<バインダー樹脂>
本発明において、感光層はバインダー樹脂として、フェノール部を質量比で20質量%以上100質量%以下含有するノボラック樹脂と、ポリビニルフェノールポリマーとを含有し、このノボラック樹脂とポリビニルフェノールポリマーとの含有量の割合(ノボラック樹脂の質量:ポリビニルフェノールポリマーの質量)が、7:3~3:7である。
ノボラック樹脂は、フェノール類をアルデヒド類で縮合してなる樹脂であって、フェノール部を質量比で20質量%以上100質量%以下含有するノボラック樹脂を、感光層は含有する。
<架橋剤>
本発明に用いられる架橋剤、即ち、酸の存在下でアルカリ可溶性樹脂と架橋しアルカリに対する溶解性を低減する架橋剤としては、レゾール樹脂、特開2000-35669号公報に記載のフェノール誘導体、メチロール基またはメチロール基の誘導体、メラミン樹脂、ベンゾグアナミン樹脂、グリコールウリル樹脂、フラン樹脂、イソシアネート、ブロックドイソシアネート(保護基を有すイソシアネート)などがあげられるが、メラミン樹脂、又はメチロール基またはアセチル化メチロール基を有している架橋剤が好ましい。また、これらを二種以上併用することもできる。なお、本発明においては、特に、メラミン樹脂であることが好ましい。
<赤外線吸収剤>
本発明に用いられる赤外線吸収剤は、好ましくは700nm以上、より好ましくは750~1200nmの赤外域に光吸収域があり、この波長の範囲の光において、光/熱変換能を発現するものを指し、具体的には、この波長域の光を吸収し熱を発生する種々の色素、もしくは顔料を用いることができる。
色素としては、市販の色素および文献(例えば「染料便覧」有機合成化学協会編集、昭和45年刊)に記載されている公知のものが利用できる。具体的には、アゾ色素、金属錯塩アゾ色素、ピラゾロンアゾ色素、アントラキノン色素、フタロシアニン色素、カルボニウム色素、キノンイミン色素、メチン色素、シアニン色素などの色素が挙げられる。本発明において、これらの顔料、もしくは色素のうち赤外光、もしくは近赤外光を吸収するものが、赤外光もしくは近赤外光を発光するレーザーでの利用に適する点で特に好ましい。
顔料としては、市販の顔料およびカラーインデックス(C.I.)便覧、「最新顔料便覧」(日本顔料技術協会編、1977年刊)、「最新顔料応用技術」(CMC出版、1986年刊)、「印刷インキ技術」(CMC出版、1984年刊)に記載されている顔料が利用できる。
<酸発生剤>
本発明に用いられる酸発生剤としては、例えば、アンモニウム塩、ホスホニウム塩、ヨードニウム塩、スルホニウム塩等の公知のオニウム塩、有機ハロゲン化合物等が挙げられる。特に、高い感度が得られる点で、トリハロアルキル化合物およびジアゾニウム塩化合物が好適に用いられる。また、必要に応じて、2種以上の熱により酸を発生する化合物を併用してもよい。
<その他の含有成分>
<可視画剤>
可視画剤としては、塩形成性有機色素を含めて、好適な色素として油溶性色素と塩基性色素を挙げることができる。特フリーラジカル又は酸と反応して色調が変化するものが好ましく使用できる。「色調が変化する」とは、無色から有色の色調への変化、有色から無色或いは異なる有色の色調への変化の何れをも包含する。好ましい色素は酸と塩を形成して色調を変化するものである。
<着色剤>
着色剤としては、市販のものを含め従来公知のものが好適に使用できる。例えば、改訂新版「顔料便覧」、日本顔料技術協会編(誠文堂新光社)、カラーインデックス便覧等に述べられているものが挙げられる。
<界面活性剤>
本発明の感光層には、塗布性を良化するため、また、現像条件に対する処理の安定性を広げるため、特開昭62-251740号公報や特開平3-208514号公報に記載されているような非イオン界面活性剤、特開昭59-121044号公報、特開平4-13149号公報に記載されているような両性界面活性剤、EP950517号明細書に記載されているようなシロキサン系化合物、特開昭62-170950号公報、特開平11-288093号公報、特願2001-247351号に記載されているようなフッ素系界面活性剤を添加することができる。
<塗布、乾燥>
本発明の感光層用の塗布液を調製する際に使用する溶剤としては、例えば、アルコール類:メタノール、エタノール、プロパノール、イソプロパノール、sec-ブタノール、イソブタノール、n-ヘキサノール、ベンジルアルコール、ジエチレングリコール、トリエチレングリコール、テトラエチレングリコール、1,5-ペンタンジオール等;エーテル類:プロピレングリコールモノメチルエーテル、プロピレングリコールモノメチルエーテルアセテート、プロピレングリコールモノエチルエーテル、プロピレングリコールモノブチルエーテル、ジプロピレングリコールモノメチルエーテル、トリプロピレングリコールモノメチルエーテル等;ケトン類:アセトン、メチルエチルケトン、メチルイソブチルケトン、ジアセトンアルコール、シクロペンタノン、ジオキソラン、シクロヘキサノン、メチルシクロヘキサノン、γ-ブチロラクトン等;エステル類:乳酸エチル、乳酸ブチル、シュウ酸ジエチル、安息香酸メチル、酢酸エチル等が好ましく挙げられる。
式(1) 感光層の乾燥付量-Ra≧1.0
上記の式(1)を満たすことで、感光層が支持体の凹凸を均一に被覆することができ、さらに画像形成した際の画像部が支持体表面(凹凸の平均的な凸部に接するように想定される平面)から適正な突き出し量を有するようになる。画像部が適正な突き出し量を有する場合、この突き出し量は画像部の支持体表面が露出するまでの磨耗余裕量と見ることができ、画像部の耐摩耗性がより良好となる。
<画像露光、加熱処理、現像>
本発明の平版印刷版材料は、画像露光により潜像を形成され、次いで、加熱処理によって潜像を形成された領域が架橋して画像形成し、さらに現像処理によって未露光部の感光層が除去され、必要に応じてガム処理を施されて、平版印刷版となる。
<現像液>
本発明の平版印刷版材料の現像に用いられる現像液としては、水系アルカリ現像液が好適である。水系アルカリ現像液(以下、本発明に係る現像液という。)は例えば、水酸化ナトリウム、水酸化カリウム、炭酸ナトリウム、炭酸カリウム、メタケイ酸ナトリウム、メタケイ酸カリウム、第二リン酸ナトリウム、第三リン酸ナトリウム等のアルカリ金属塩の水溶液が挙げられる前記アルカリ金属塩の濃度は0.05~20質量%の範囲で用いるのが好適であり、より好ましくは、0.1~10質量%である。現像液には、必要に応じアニオン性界面活性剤、両性界面活性剤、キレート剤、アルコール等の有機溶剤、を加えることができる。有機溶剤としては、プロピレングリコール、エチレングリコールモノフェニルエーテル、ベンジンアルコール、n-プロピルアルコール等が有用である。
<支持体の作製>
厚さ0.30mmのアルミニウム板(材質1050、調質H16)を、50℃の1質量%水酸化ナトリウム水溶液中に浸漬し、溶解量が2g/m2になるように溶解処理を行い水洗した後、25℃の0.1質量%塩酸水溶液中に30秒間浸漬し、中和処理した後水洗した。
表2~表7に示す固形分比率となるように各素材をMEK(メチルエチルケトン)/PGM(プロピレングリコールモノメチルエーテル)=20/80の混合溶媒に塗布液の固形分が8質量%となるように溶解し、十分混合した後にろ過して各感光層塗布液を得た。
<バインダーA:ノボラック>
1.フェノール/m-クレゾール/p-クレゾール=50/30/20、Mw:18000
2.フェノール/m-クレゾール/p-クレゾール=50/30/20、Mw:6000
3.フェノール/m-クレゾール/p-クレゾール=25/45/30、Mw:10000
4.フェノール=100、Mw:1000
5.m-クレゾール/p-クレゾール=60/40、Mw:6000
6.m-クレゾール=100、Mw:13000
7.キシレノール/m-クレゾール/p-クレゾール=20/45/35、Mw:37000
8.フェノール/m-クレゾール/p-クレゾール=5/57/38、Mw:10000<バインダーB:A以外>
1.p-ビニルフェノールのホモポリマー、Mw:10000
2.p-ビニルフェノールのホモポリマー、Mw:5000
3.p-ビニルフェノール/HEMA=50/50、Mw:10000
4.HyPMA/AN/MMA=40/30/30、Mw:22000
5.HyPMI/AN/MMA=26/37/37、Mw:14000
6.HyPMA/MAN/MMA/BzMA=34/20/36/10、Mw:26000
但し、
HEMA:アクリル酸2-ヒドロキシエチル、
HyPMA:ヒドロキシフェニルメタアクリルアミド、
AN:アクリロニトリル、
MMA:メタクリル酸メチル、
HyPMI:ヒドロキシフェニルマレイミド、
MAN:メタクリロニトリル、
BzMA:メタクリル酸ベンジル、
<架橋剤>
1.メチル化メラミン樹脂:Cymel303(日本サイテックインダストリーズ社製、単量体約60%)
2.メチル化メラミン樹脂:ニカラックMW-390(三和ケミカル社製、単量体96%以上)
3.レゾール樹脂:BKS-5928(ユニオンカーバイド社製)
4.2,6-Dihydroxymethyl-4-methylphenol
1. OIL BLUE 613 (オリエント化学工業社製)
2. ビクトリアピュアーブルーBOH-M(保土谷化学社製)
3. シアニン
<界面活性剤>
1.フッ素系界面活性剤、メガファックF-177(DIC(株)製)
2.フッ素系界面活性剤、PF-6320(OMNOVA社製)
<平版印刷版材料106~144の作製>
支持体3の粗面化面に、ワイヤーバーを用いて乾燥付量が1.6g/m2となるように各感光層塗布液をそれぞれ塗布し、80℃の温風循環型ドライヤー中に60秒間保持して乾燥させ、平版印刷版材料106~144を得た。
<画像露光>
得られた平版印刷版材料を、半導体レーザーヘッドを搭載した市販のCTPセッター(大日本スクリーン製造株式会社製、PTR-4300)を用い、ドラム回転数1000rpm、レーザー出力を40%から5%刻みで100%となるまで変化させて、解像度2400dpi(dpiとは1インチ即ち2.54cm当たりのドット数を表す。)で175線相当の画像露光を行った。露光した画像は50%網点画像とベタ画像とを含むものである。露光で設定したレーザー出力は、60.4mJ/cm2から160.4mJ/cm2に相当するものである。
<露光後加熱処理>
露光直後(5分以内)に平版印刷版材料を加熱処理した。加熱処理にはQuartz Supreme Pre-bake Oven(Glunz&Jensen社製)を用いた。加熱処理条件は、設定温度:275F(135.0℃)、滞留時間:75秒となるように調整した。事前にサーモラベルを貼った平版印刷版材料を加熱処理して処理時の版面到達温度が何度になるか確認したところ、版面到達温度は135℃であった。サーモラベルは5℃刻みの表示のものを使用した。
<現像処理>
加熱処理直後(5分以内)に平版印刷版材料を現像処理した。自動現像機:Raptor85T(Glunz&Jensen社製)を用い、下記の組成の現像液を用いて現像処理を行った。現像条件は液温:26℃、処理滞留時間:25秒となるように調整した。ガム液は水道水で代用し、ガム処理は行わなかった。このようにして、平版印刷版材料106~144に画像を形成して、平版印刷版を得た。
現像液組成
平版印刷版材料106~144の、露光出力を変化させて形成した50%網点画像部の実網点%をiCPlate2(X-Rite社製)を用いて測定し、露光エネルギーに対する網点%変化のカーブをそれぞれ作成した。このカーブより実網点%が50%となる露光エネルギーを求め、50%網点感度とした。各平版印刷版の50%網点感度を表9に示した。
<耐溶剤性1>
平版印刷版材料106~144の、それぞれの50%網点感度以上でかつ50%網点感度に最も近い露光出力で画像形成されたベタ画像部を切り出し、PGM(プロピレングリコールモノメチルエーテル)中に一部を浸漬させて画像の耐溶剤性を調べた。出力100%でも50%網点画像部の実網点%が50%未満となったものは出力100%の画像部を用いた。また、出力100%でも均一なベタ画像が得られなかったものについては、画像形成不良とし、耐溶剤性評価は行わなかった。浸漬時の液温は20℃とし、浸漬時間は120分とした。耐溶剤性1は、耐溶剤性を下記の指標に基づいて目視評価し、結果を表9に示した。耐溶剤性が良好であるほど画像部塗膜の架橋が進行し、強靭な塗膜となっていると考えられる。
耐溶剤性の評価指標:数値が大きいほど良好
5:画像部塗膜の色の変化がほとんどなく、浸漬部と未浸漬部の境界も目立たない。
4:画像部塗膜の色の変化は少ないが、浸漬部と未浸漬部の境界は明確に確認できる。
3:画像部塗膜の色の変化が大きく、浸漬部は未浸漬部の1/2程度の濃度になっている。
2:画像部塗膜の色がほとんど抜けてしまっている。
1:画像部塗膜の色が完全に抜けてしまい、塗膜はがれが生じている。
<耐溶剤性2>
溶剤としてジエチレングリコールモノブチルエーテルを約75%含有する市販のクリーナーである、キンヨーダンプクリーン2 ECO(金陽社製)を用いた以外は耐溶剤性1と同様にして評価を行った。結果を表9に示した。
<平版印刷版II-15~II-42の作製>
平版印刷版材料106、109について、露光後加熱処理の露光後加熱条件を表10に示す条件とした以外は実施例1と同様にして表11に示すような平版印刷版II-15~II-42を作製した。
<評価>
実施例1と同様にして耐溶剤性(耐溶剤性1、耐溶剤性2)を評価した。
<現像残り(非画像部の濃度)>
また、下記のようにして非画像部の濃度(現像で露出した支持体表面の濃度)を測定した。露光後加熱条件Aで得られた非画像部の濃度(基準として)に対して、濃度が0.01以上上がった場合は現像残りが生じており、現像残りがありとし、濃度が0.01未満の場合は現像残りがなしと評価した。結果を表11に示す。
<非画像部の濃度の測定方法>
X-Rite528(X-Rite社製)を用いて、ステータスTで版面非画像部のシアン濃度を測定した。
<露光後加熱条件>
下記の装置1、装置2を用いた。版面到達温度は実施例1と同様にして確認した。
装置1:Quartz Supreme Pre-bake Oven(Glunz&Jensen社製)
装置2:連続した二つの加熱ゾーンを有し、それぞれ個別に温度設定が可能な装置
二つの加熱ゾーンの長さは同一であり、搬送処理による二つのゾーンそれぞれの滞留時間も同一である。
<平版印刷版III-9~III-43の作製>
6、9、12、17、22~36を用い、支持体、塗布液、付量の組み合わせを表12に示す組み合わせとした以外は実施例1と同様にして平版印刷版材料301~323、122~136を作製した。
<印刷時の耐磨耗性評価>
画像を形成した各平版印刷版材料(即ち、平版印刷版)を用いて、下記に示すような手順で印刷時の耐摩耗性を評価した。
<平版印刷版材料の準備>
平版印刷版材料106、109、112、117を用いた。
<印刷時の耐薬品(耐溶剤)性評価>
実施例3と同様にして画像を形成した各平版印刷版材料(即ち、平版印刷版)を用いて、下記に示すような手順で印刷時の耐摩耗性を評価した。
<支持体6の作製>
厚さ0.20mmのアルミニウム板(材質1050、調質H16)を用いた以外は、実施例1で作製した支持体3と同様にして、支持体6を作製した。
<平版印刷版材料501の作製>
支持体6と塗布液6とを用いて、実施例1と同様にして平版印刷版材料501を作製した。
<露光後加熱および現像処理条件>
条件X:露光後加熱処理装置1と自動現像機とを直結して、加熱処理直後に現像処理が行われるようにした。
○:変形がほとんど見られない
△:変形が確認できるが印刷画像には影響しないレベル
×:変形が著しく印刷画像への影響が懸念されるレベル
結果を表15に示す。
Claims (7)
- 粗面化処理および陽極酸化処理されたアルミニウム支持体上に、感光層を有する平版印刷版材料において、該感光層が下記a~dを含有し、
a:バインダー樹脂
b:架橋剤
c:赤外線吸収剤
d:酸発生剤
かつ、aがフェノール部を質量比で20質量%以上100質量%以下含有するノボラック樹脂と、ポリビニルフェノールポリマーとを含有し、該ノボラック樹脂と該ポリビニルフェノールポリマーとの含有量の割合(ノボラック樹脂の質量:ポリビニルフェノールポリマーの質量)が、7:3~3:7であり、かつ、b/aの質量比率が0.25以上、0.50以下であることを特徴とする平版印刷版材料。 - bがメラミン樹脂を含有することを特徴とする請求項1に記載の平版印刷版材料。
- dがトリアジン化合物を含有することを特徴とする請求項1または2に記載の平版印刷版材料。
- 前記アルミニウム支持体の表面粗さRa(μm)と前記感光層の乾燥付量(g/m2)との関係が、下記式(1)を満たすことを特徴とする請求項1~3のいずれか1項に記載の平版印刷版材料。
式(1) 感光層の乾燥付量-Ra≧1.0 - 請求項1~4のいずれか1項に記載の平版印刷版材料を画像様露光し、加熱処理を行い、次いで現像処理を行って得られる平版印刷版において、該加熱処理における処理条件が、平版印刷版材料の版面到達温度として、130℃以上、155℃以下であることを特徴とする平版印刷版。
- 前記加熱処理に用いる加熱装置が平版印刷版材料を搬送しながら加熱する装置であり、該加熱装置は個別に温度設定可能な複数の加熱ゾーンを有し、かつ、平版印刷版材料が最後に通過する加熱ゾーンの設定温度が、それ以前の加熱ゾーンの設定温度よりも低い加熱処理条件を用いることを特徴とする請求項5に記載の平版印刷版。
- 平版印刷版材料が最後に通過する加熱ゾーンの設定温度が、それ以前の加熱ゾーンにおける最高設定温度よりも5℃以上低いことを特徴とする請求項6に記載の平版印刷版。
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JP2011504768A JP5423786B2 (ja) | 2009-03-19 | 2010-01-14 | 平版印刷版材料および平版印刷版 |
US13/256,907 US20120000385A1 (en) | 2009-03-19 | 2010-01-14 | Lithographic printing plate material and lithographic printing plate |
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US (1) | US20120000385A1 (ja) |
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JP2016177027A (ja) * | 2015-03-19 | 2016-10-06 | 日立化成株式会社 | 感光性樹脂組成物、該感光性樹脂組成物を用いた形成したパターン硬化膜、及び該パターン硬化膜を撥インク性バンク膜として備える有機el用表示装置 |
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JPH09244226A (ja) * | 1996-03-12 | 1997-09-19 | Mitsubishi Chem Corp | 平版印刷版 |
JPH11143075A (ja) * | 1997-11-12 | 1999-05-28 | Mitsubishi Chemical Corp | 感光性組成物および感光性平版印刷版 |
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JP2004294702A (ja) * | 2003-03-26 | 2004-10-21 | Fuji Photo Film Co Ltd | 平版印刷版原版及びその作成方法 |
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JPH09244226A (ja) * | 1996-03-12 | 1997-09-19 | Mitsubishi Chem Corp | 平版印刷版 |
JPH11143075A (ja) * | 1997-11-12 | 1999-05-28 | Mitsubishi Chemical Corp | 感光性組成物および感光性平版印刷版 |
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JP2016177027A (ja) * | 2015-03-19 | 2016-10-06 | 日立化成株式会社 | 感光性樹脂組成物、該感光性樹脂組成物を用いた形成したパターン硬化膜、及び該パターン硬化膜を撥インク性バンク膜として備える有機el用表示装置 |
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US20120000385A1 (en) | 2012-01-05 |
JPWO2010106827A1 (ja) | 2012-09-20 |
JP5423786B2 (ja) | 2014-02-19 |
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