WO2010021186A1 - インクジェット製版方法 - Google Patents
インクジェット製版方法 Download PDFInfo
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- WO2010021186A1 WO2010021186A1 PCT/JP2009/060508 JP2009060508W WO2010021186A1 WO 2010021186 A1 WO2010021186 A1 WO 2010021186A1 JP 2009060508 W JP2009060508 W JP 2009060508W WO 2010021186 A1 WO2010021186 A1 WO 2010021186A1
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- ink
- water
- plate
- soluble organic
- organic solvent
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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
- B41C1/1066—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by spraying with powders, by using a nozzle, e.g. an ink jet system, by fusing a previously coated powder, e.g. with a laser
Definitions
- the present invention relates to an ink jet plate making method, and more particularly to an ink jet plate making method using a computer-to-plate (CTP) method using an ink jet recording method.
- CTP computer-to-plate
- the solid ink method described in JP-A Nos. 11-139016 and 11-139017, or photo-curable ink containing a photo-curable monomer is applied to a printing plate material to form an image, and light irradiation is performed.
- Discloses a UV curing type plate making method for curing an image portion see, for example, Patent Document 2.
- the solidified whole ink has a structure in which the image area is raised with respect to the non-image area. There is a problem that a dot gain phenomenon is likely to occur in which even ink attached to the ink is transferred.
- the present invention has been made in view of the above-mentioned problems, and its purpose is to make use of the convenience and high productivity features of the ink jet method, and the liquid approach due to the coalescence of ink droplets, which was problematic in the ink jet method plate making. And providing an ink-jet plate making method with improved printing durability.
- At least a plate-forming ink containing water, a water-soluble organic solvent, and resin fine particles is used.
- the plate-forming ink is adhered onto a heated printing plate material, and the solvent in the plate-forming ink is evaporated and dried.
- the minimum film forming temperature (MFT (water)) of the resin fine particles is 40 ° C. or more, and the plate forming ink has an MFT of the resin fine particles of 5 ° C.
- the water-soluble organic solvent (A) to be reduced is contained, the water-soluble organic solvent (A) is 20% or more of the total water-soluble organic solvent in the ink, and the boiling point of the water-soluble organic solvent (A) is 180.degree. C. or higher and 300.degree. C. or lower, an ink jet plate making method.
- the plate forming ink has a polymer compound having a plurality of side chains in the main chain and capable of crosslinking between the side chains by irradiating with active energy rays, and the content of the polymer compound is 0.8 mass% or more and 5.0 mass% or less with respect to the total mass of the ink, the main chain of the polymer compound is a saponified product of polyvinyl acetate, and the saponification degree is 77% or more, 99 % Or less, and the degree of polymerization is 200 or more and 4000 or less,
- the inkjet plate-making method according to any one of 1 to 8, wherein
- an ink jet plate making method utilizing the convenience and high productivity characteristics of the ink jet method and improving the liquid contact and printing durability due to coalescence of ink droplets, which has been problematic in the ink jet method plate making. I was able to.
- FIG. 1 shows a flat bed type ink jet printer used in the ink jet plate making method of the present invention.
- the mechanism of action is under intensive study and there are still many unclear points, but at this stage, it is considered as follows. That is, the liquid side can be improved by heating the plate material in advance, and this is considered to increase the viscosity of the ink droplets as the water evaporates immediately upon landing.
- an organic solvent that lowers the minimum film forming temperature in the ink, it is possible to form a film with less energy. Further, this organic solvent lowers the printing durability at the time of printing, but it is believed that by using an organic solvent having a low boiling point, it can be evaporated at the time of preparing the plate and the film strength can be kept high. .
- ink a plate forming ink (hereinafter also simply referred to as ink) according to the ink jet plate making method of the present invention will be described.
- the ink according to the present invention contains at least water, a water-soluble organic solvent, and resin fine particles, the minimum film forming temperature (MFT) of the resin fine particles in water is 40 ° C. or more, and the ink contains It contains a water-soluble organic solvent (A) that lowers the MFT of resin fine particles by 5 ° C. or more.
- MFT minimum film forming temperature
- A water-soluble organic solvent
- Minimum film forming temperature First, the minimum film-forming temperature of resin fine particles (hereinafter referred to as MFT) will be described.
- MFT represents the minimum temperature required for resin fine particles to form a film by heating, and the minimum structure for forming a dry film by spreading an emulsion (dispersion of resin fine particles) on a thermally conductive plate with a temperature gradient. It can be easily measured using a film temperature measuring device. Further, by comparing the MFT measurement in the state of the resin fine particle aqueous solution and the MFT measurement in the ink composition state, it can be determined whether the solvent in the ink reduces the MFT of the resin fine particle. In the present invention, unless the presence of an organic solvent is specified, the MFT of resin fine particles in an aqueous solution is indicated.
- the water-soluble organic solvent that lowers the MFT of the resin fine particles is referred to as a water-soluble organic solvent (A) in the present invention.
- the resin fine particles according to the present invention are not particularly limited as long as the MFT (water) is 40 ° C. or higher, but preferably polyurethane, polystyrene-acrylic, polystyrene-butadiene, polystyrene-maleic acid, polyester, polyether, polycarbonate. Resin fine particles made of polyamide, polyacrylonitrile, polystyrene, polybutadiene, polyacrylic acid, polymethacrylic acid, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, acrylic modified silicone resin, acrylic modified fluororesin, etc. And fine particles of a polymer and a salt thereof.
- a copolymer selected from at least one of polyurethane, polystyrene-acryl, polystyrene-butadiene, and polystyrene-maleic acid is used. It is below.
- the average particle size of the resin fine particles is preferably 5 nm or more and 150 nm or less.
- the thickness is 5 nm or more, the ink-implanting property is improved, and when the particle diameter is 150 nm or less, the light emission from the ink jet head is stabilized, and in the production of a printing plate requiring a high landing system, fine lines are reproduced. And reproducibility of small characters are improved.
- the average particle size of the resin fine particles can be determined by a commercially available particle size measuring instrument using a light scattering method, an electrophoresis method, a laser Doppler method, or the like.
- the content of the resin fine particles according to the present invention is preferably 0.1% by mass or more and 7% by mass or less with respect to the total mass of the ink, but 5% by mass or less. More preferably.
- the content is 0.1% by mass or more, the inking property is good, and when the amount is 7% by mass or less, sufficient inking property is obtained, and nozzle clogging during intermittent emission can be prevented.
- the viscosity of the ink increases due to the addition of resin fine particles. When the viscosity of the ink becomes high, ejection at a high driving frequency becomes impossible, which causes a decrease in productivity. Considering the ink viscosity, it is preferably 5% by mass or less.
- the resin fine particles according to the present invention may be either a forced emulsification type forcibly emulsified with an emulsifier, or a self-emulsification type in which a hydrophilic group or a hydrophilic segment is added and dispersed in the resin.
- a surfactant is often used as an emulsifier, but a polymer having a hydrophilic group such as a sulfonic acid group or a carboxylic acid group (for example, a polymer having a hydrophilic group grafted thereto, a monomer having a hydrophilic part, It is also preferable to use a polymer obtained from a monomer having a hydrophobic portion.
- latex polymer particles there are also latexes in which core-shell type polymer particles having different compositions at the center and outer edge of the particles are dispersed in addition to the latex in which the polymer particles are uniform throughout.
- this type of latex can also be preferably used.
- the acid value of the resin fine particles according to the present invention is preferably 10 mgKOH / g or more, more preferably 30 mgKOH / g or more. From the viewpoint of storage stability, it is preferably nonionic or anionic.
- the acid value as used in the present invention generally indicates the amount of mg when neutralizing free fatty acid in 1 g of a sample with potassium hydroxide.
- the acid value in the present invention is used as a raw material monomer at the time of resin fine particle synthesis. It can also be obtained by calculation from the neutralized carboxyl group amount.
- the acid counter salt of the resin fine particles in the present invention is preferably an alkali metal salt, which includes lithium, sodium, potassium, rubidium and cesium, all present as monovalent cation ions in an aqueous solution. can do.
- alkali metal salt which includes lithium, sodium, potassium, rubidium and cesium, all present as monovalent cation ions in an aqueous solution. can do.
- sodium, potassium and lithium are preferably used, and sodium is particularly preferable.
- the amount of alkali metal added to the ink is preferably 0.1% to 0.2%.
- Water-soluble organic solvent The water-soluble organic solvent (A) according to the present invention and the water-soluble organic solvent (A) that lowers the MFT of the resin fine particles defined by the present invention by 5 ° C. or more will be described.
- the solvent constituting the ink according to the present invention contains at least water, and further contains a water-soluble organic solvent.
- the ink according to the present invention contains a water-soluble organic solvent (A) that lowers the MFT of resin fine particles by 5 ° C. or more.
- the water-soluble organic solvent (A) that lowers the MFT of the resin fine particles contained in the ink by 5 ° C. or more cannot be determined uniquely because it differs depending on the combination with the resin fine particles used. By using it, it can be easily determined whether or not the water-soluble organic solvent is the water-soluble organic solvent (A) of the present invention in combination with the resin.
- the water-soluble organic solvent (A) according to the present invention is characterized by containing 20% by mass or more of the total water-soluble organic solvent in the ink, and the boiling point of the water-soluble organic solvent (A) is: It is 180 degreeC or more and 300 degrees C or less.
- Table 1 below shows typical examples of the water-soluble organic solvent (A) that lowers the MFT of the resin fine particles according to the present invention by 5 ° C. or more and the non-reduced water-soluble organic solvent that does not affect the MFT of the resin fine particles. Note that whether or not the resin fine particles have the ability to lower the MFT can not be generally defined by the type of the resin fine particles, and Table 1 shows examples of the solvent classifications. It is not limited only to the classification of the solvent to be used.
- the water-soluble organic solvent (A) is preferably 80% by mass or more of the total water-soluble organic solvent in the ink, and the boiling point of the water-soluble organic solvent (A) is 180 ° C. or more and 250 ° C. or less. Further, it is preferably 180 ° C. or higher and 200 ° C. or lower.
- the total amount of the solvent (mixture of water and water-soluble organic solvent) contained in the ink according to the present invention is preferably 50% by mass or more and 98% by mass or less, and 80% by mass or more and 98% by mass or less with respect to the total amount of the ink. Is more preferable. Furthermore, it is preferable that water is contained in an amount of 50% by mass to 80% by mass with respect to the total amount of ink.
- the active energy ray crosslinkable polymer compound a polymer compound having a plurality of side chains in the main chain and capable of being cross-linked between the side chains by irradiating active energy rays. It is preferable to contain 0.8% by mass or more and 5.0% by mass or less with respect to the total mass of the ink, the main chain of the polymer compound is a saponified product of polyvinyl acetate, and the saponification degree is 77. % Or more and 99% or less, and the degree of polymerization is preferably 200 or more and 4000 or less.
- the polymer compound having a plurality of side chains in the main chain according to the present invention and capable of cross-linking between side chains by irradiating active energy rays is a saponified product of polyvinyl acetate, polyvinyl acetal, polyethylene oxide, With respect to at least one resin selected from the group consisting of polyalkylene oxide, polyvinyl pyrrolidone, polyacrylamide, polyacrylic acid, hydroxyethyl cellulose, methyl cellulose, hydroxypropyl cellulose, or derivatives of these resins, and copolymers thereof.
- a modifying group such as a photodimerization type, a photolysis type, a photopolymerization type, a photomodification type, or a photodepolymerization type is introduced.
- Photopolymerizable crosslinkable groups are desirable from the viewpoints of sensitivity and performance of the generated image.
- a saponified product of polyvinyl acetate is preferable from the viewpoint of ease of introduction of side chains and handling, and the degree of polymerization is preferably 200 or more and 4000 or less, and more preferably 200 or more and 2000 or less from the viewpoint of handling. preferable.
- the modification rate of the side chain with respect to the main chain is preferably 0.3 mol% or more and 4 mol% or less, but more preferably 0.8 mol% or more and 4 mol% or less from the viewpoint of reactivity. If the modification rate of the side chain with respect to the main chain is less than 0.3 mol%, the crosslinkability is insufficient and the effect of the present invention is reduced. If it exceeds 4 mol%, the crosslink density increases and the film becomes hard and brittle. Will fall.
- photodimerization type modifying group those in which a diazo group, a cinnamoyl group, a stilbazonium group, a stilquinolium group or the like is introduced are preferable.
- the photosensitive resin described in JP-A-60-129742 is a compound represented by the following general formula (1) in which a stilbazonium group is introduced into a polyvinyl alcohol structure.
- R 1 represents an alkyl group having 1 to 4 carbon atoms
- a - represents a counter anion
- the photosensitive resin described in JP-A-56-67309 has a 2-azido-5-nitrophenylcarbonyloxyethylene structure represented by the following general formula (2) in the polyvinyl alcohol structure or the following general formula: A resin composition represented by (3) and having a 4-azido-3-nitrophenylcarbonyloxyethylene structure.
- a modifying group represented by the following general formula (4) is also preferably used.
- R represents an alkylene group or an aromatic ring.
- a benzene ring is preferred.
- a resin represented by the following general formula (5) shown in JP-A Nos. 2000-181062 and 2004-189841 is preferable from the viewpoint of reactivity.
- R 2 represents a methyl group or a hydrogen atom
- n 1 or 2
- X represents — (CH 2 ) m —COO— or —O—
- Y represents an aromatic ring.
- it represents a single bond
- m represents an integer from 0 to 6.
- R 3 represents a methyl group or a hydrogen atom
- R 4 represents a linear or branched alkylene group having 2 to 10 carbon atoms.
- Such an active energy ray-crosslinking resin is preferably contained in an amount of 0.8% by mass or more and 5.0% by mass or less based on the total mass of the ink.
- the presence of 0.8% by mass or more improves cross-linking efficiency, and beading and color bleeding are more preferable due to a rapid increase in ink viscosity after cross-linking.
- 5.0% by mass or less it is difficult to adversely affect the ink physical properties and the state in the ink head, which is preferable from the viewpoint of the emission property and the ink storage property.
- the main chain having a certain degree of polymerization is cross-linked through a cross-linking bond between the side chains, and therefore through a general chain reaction.
- the effect of increasing the molecular weight per photon is significantly greater than the active energy ray-curable resin that polymerizes.
- the conventionally known active energy ray curable resins since the number of crosslinking points cannot be controlled, the physical properties of the film after curing cannot be controlled, and the film tends to be hard and brittle.
- the number of crosslinking points can be completely controlled by the length of the main chain and the amount of side chains introduced, and the physical properties of the ink film can be controlled according to the purpose.
- the dots after the curing increase, resulting in a thick plate and a dot gain.
- the plate making method using ink using the resin used in the present invention a small amount of resin is added, and since there are many dry components, there is no need for the dots to rise unnecessarily after curing. Can be formed.
- Photopolymerization initiator, sensitizer In the present invention, it is also preferable to add a photopolymerization initiator or a sensitizer. These compounds may be dissolved or dispersed in a solvent or chemically bonded to the photosensitive resin.
- the applied photopolymerization initiator and photosensitizer are not particularly limited, and conventionally known ones can be used.
- a water-soluble compound is preferable from the viewpoints of mixing property and reaction efficiency.
- 4- (2-hydroxyethoxy) phenyl- (2-hydroxy-2-propyl) ketone (HMPK), thioxanthone ammonium salt (QTX), and benzophenone ammonium salt (ABQ) are preferable from the viewpoint of miscibility with an aqueous solvent. .
- n an integer of 1 to 5.
- benzophenones such as benzophenone, hydroxybenzophenone, bis-N, N-dimethylaminobenzophenone, bis-N, N-diethylaminobenzophenone, 4-methoxy-4'-dimethylaminobenzophenone.
- Thioxanthones such as thioxatone, 2,4-diethylthioxanthone, isopropylthioxanthone, chlorothioxanthone, and isopropoxychlorothioxanthone.
- Anthraquinones such as ethyl anthraquinone, benzanthraquinone, aminoanthraquinone and chloroanthraquinone.
- Acetophenones Benzoin ethers such as benzoin methyl ether. 2,4,6-trihalomethyltriazines, 1-hydroxycyclohexyl phenyl ketone, 2- (o-chlorophenyl) -4,5-diphenylimidazole dimer, 2- (o-chlorophenyl) -4,5-di ( m-methoxyphenyl) imidazole dimer, 2- (o-fluorophenyl) -4,5-phenylimidazole dimer, 2- (o-methoxyphenyl) -4,5-phenylimidazole dimer, 2- (P-methoxyphenyl) -4,5-diphenylimidazole dimer, 2,4-di (p-methoxyphenyl) -5-phenylimidazole dimer, 2- (2,4-dimethoxyphenyl) -4, 2,4,5-triarylimidazole dimer of 5-diphenylimidazole
- photopolymerization initiators In addition to these photopolymerization initiators, accelerators and the like can also be added. Examples of these include ethyl p-dimethylaminobenzoate, isoamyl p-dimethylaminobenzoate, ethanolamine, diethanolamine, triethanolamine and the like. These photopolymerization initiators are preferably grafted to the side chain with respect to the main chain.
- the ink used in the inkjet plate making method of the present invention may be a clear ink that does not contain a colorant, but preferably contains a colorant for the purpose of easily identifying a pattern drawn on a printing plate.
- the content of the colorant may be smaller than that of the inkjet ink used for image formation, and is preferably 0.1% by mass or more and 3.0% by mass or less with respect to the total amount of the ink.
- a coloring agent either a dye or a pigment may be sufficient.
- dye there is no restriction
- water-soluble dyes examples include azo dyes, methine dyes, azomethine dyes, xanthene dyes, quinone dyes, phthalocyanine dyes, triphenylmethane dyes, and diphenylmethane dyes.
- a compound represented by the following general formula (8) or a compound represented by the general formula (9) can also be used.
- R 1 represents a hydrogen atom or a substitutable substituent, and is preferably a hydrogen atom or a phenylcarbonyl group.
- R 2 may be different and represents a hydrogen atom or a substitutable substituent, and is preferably a hydrogen atom.
- R 3 represents a hydrogen atom or a substitutable substituent, and is preferably a hydrogen atom or an alkyl group.
- R 4 represents a hydrogen atom or a substitutable substituent and is preferably a hydrogen atom or an aryloxy group.
- R 5 may be different and represents a hydrogen atom or a substitutable substituent, and is preferably a sulfonic acid group.
- n represents an integer of 1 to 4
- m represents an integer of 1 to 5.
- X represents a phenyl group or a naphthyl group, may be substituted with a substitutable substituent, and is preferably substituted with a sulfonic acid group or a carboxyl group.
- Y represents hydrogen ion, sodium ion, potassium ion, lithium ion, ammonium ion or alkylammonium ion.
- R 6 may be different and represents a hydrogen atom or a substituent that can be substituted on the naphthalene ring.
- q represents 1 or 2.
- Z represents a substitutable substituent, and represents a carbonyl group, a sulfonyl group or a group represented by the following general formula (10), and particularly preferably a group represented by the following general formula (10).
- W 1 and W 2 each independently represent a halogen atom, amino group, hydroxyl group, alkylamino group or arylamino group, preferably a halogen atom, hydroxyl group or alkylamino group.
- Disperse dye various disperse dyes such as an azo disperse dye, a quinone disperse dye, an anthraquinone disperse dye, and a quinophthalone disperse dye can be used.
- pigment that can be used in the present invention
- conventionally known pigments can be used without limitation, and any of water-dispersible pigments, solvent-dispersible pigments, and the like can be used.
- organic pigments such as insoluble pigments and lake pigments, and carbon
- An inorganic pigment such as black can be preferably used.
- This pigment is present in a state of being dispersed in the ink, and this dispersion method may be any of self dispersion, dispersion using a surfactant, polymer dispersion, and microcapsule dispersion.
- the insoluble pigment is not particularly limited, for example, azo, azomethine, methine, diphenylmethane, triphenylmethane, quinacridone, anthraquinone, perylene, indigo, quinophthalone, isoindolinone, isoindoline, azine, oxazine, thiazine, Dioxazine, thiazole, phthalocyanine, diketopyrrolopyrrole and the like are preferable.
- pigments that can be preferably used include the following pigments.
- magenta or red pigments examples include C.I. I. Pigment red 2, C.I. I. Pigment red 3, C.I. I. Pigment red 5, C.I. I. Pigment red 6, C.I. I. Pigment red 7, C.I. I. Pigment red 15, C.I. I. Pigment red 16, C.I. I. Pigment red 48: 1, C.I. I. Pigment red 53: 1, C.I. I. Pigment red 57: 1, C.I. I. Pigment red 122, C.I. I. Pigment red 123, C.I. I. Pigment red 139, C.I. I. Pigment red 144, C.I. I. Pigment red 149, C.I. I.
- Pigment red 166 C.I. I. Pigment red 177, C.I. I. Pigment red 178, C.I. I. Pigment red 202, C.I. I. Pigment red 222, C.I. I. Pigment violet 19 and the like.
- orange or yellow pigments examples include C.I. I. Pigment orange 31, C.I. I. Pigment orange 43, C.I. I. Pigment yellow 12, C.I. I. Pigment yellow 13, C.I. I. Pigment yellow 14, C.I. I. Pigment yellow 15, C.I. I. Pigment yellow 15: 3, C.I. I. Pigment yellow 17, C.I. I. Pigment yellow 74, C.I. I. Pigment yellow 93, C.I. I. Pigment yellow 128, C.I. I. Pigment yellow 94, C.I. I. And CI Pigment Yellow 138.
- green or cyan pigments examples include C.I. I. Pigment blue 15, C.I. I. Pigment blue 15: 2, C.I. I. Pigment blue 15: 3, C.I. I. Pigment blue 16, C.I. I. Pigment blue 60, C.I. I. And CI Pigment Green 7.
- pigment for black for example, C.I. I. Pigment black 1, C.I. I. Pigment black 6, C.I. I. Pigment black 7 and the like.
- the average particle size in the dispersed state of the pigment contained in the ink according to the present invention is preferably 50 nm or more and less than 200 nm.
- the particle size of the pigment dispersion can be determined by a commercially available particle size measuring instrument using a dynamic light scattering method, an electrophoresis method, or the like. Accurate and often used.
- the pigment used in the ink according to the present invention is preferably dispersed by a disperser and used together with a dispersant and other necessary additives according to various desired purposes.
- a disperser a conventionally known ball mill, sand mill, line mill, high-pressure homogenizer, or the like can be used.
- the particle size distribution of the ink produced by dispersion using a sand mill is sharp and preferable.
- the material of the beads used for sand mill dispersion is preferably zirconia or zircon from the viewpoint of contamination of bead fragments and ionic components. Further, the bead diameter is preferably 0.3 mm to 3 mm.
- a surfactant or a polymer dispersant can be used alone or in combination as the dispersant.
- the ink according to the present invention may contain a surfactant.
- Surfactants preferably applied to the ink according to the present invention include alkyl sulfates, alkyl ester sulfates, dialkyl sulfosuccinates, alkyl naphthalene sulfonates, alkyl phosphates, polyoxyalkylene alkyl ether phosphates, Anionic surfactants such as fatty acid salts, nonionic surfactants such as polyoxyethylene alkyl ethers, polyoxyalkylene alkyl phenyl ethers, acetylene glycols, polyoxyethylene-polyoxypropylene block copolymers, glycerin esters, Activators such as sorbitan esters, polyoxyethylene fatty acid amides, amine oxides, and cationic surfactants such as alkylamine salts and quaternary ammonium salts.
- surfactants can also be used as a pigment dispersant, and anionic and nonionic surfactants can be particularly preferably used.
- additives in the present invention, other conventionally known additives can be contained.
- fluorescent brighteners, antifoaming agents, lubricants, preservatives, thickeners, antistatic agents, matting agents, water-soluble polyvalent metal salts, acid bases, pH adjusters such as buffers, antioxidants, surfaces These are tension modifiers, non-resistance modifiers, rust inhibitors, inorganic pigments, and the like.
- the ink according to the present invention has a preferable range of physical properties of the ink in order to stably produce a high-definition printing plate by an ink jet method.
- the viscosity of the ink is preferably from 1 mPa ⁇ s to 15 mPa ⁇ s, particularly preferably from 2 mPa ⁇ s to 8 mPa ⁇ s.
- the viscosity is less than 1 mPa ⁇ s, stable injection cannot be performed, and when the viscosity exceeds 15 mPa ⁇ s, satellites are easily generated, which causes a problem as a printing plate. Further, it becomes impossible to eject ink at a fast repetition period, and the production speed is lowered.
- the surface tension of the ink is preferably 25 mN / m or more and 50 mN / m or less, particularly preferably 30 mN / m or more and 45 mN / m or less. If it is less than 25 mN / m, the wetted spread of the dots that have landed on the printing plate material is large, and the resolution is lowered. On the other hand, if it exceeds 50 mN / m, bubbles are not easily removed from the ink jet recording head, and the ejection stability is poor.
- the ink according to the present invention can be produced by a conventionally known method, but it is preferable to perform filtration in the production process.
- a filtration method for example, a metal mesh filter is used, but it is also preferable to perform filtration with a resin volume filtration filter such as polypropylene in combination with this.
- the ink according to the present invention is preferably subjected to deaeration treatment.
- the degassing method include a method of degassing by stirring in a vacuum chamber, a method of sealing and degassing after heating the ink, and a method of using a degassing module using a hollow fiber.
- a method using a deaeration module is particularly preferred.
- the printing plate material used in the inkjet plate making method of the present invention preferably has a hydrophilic surface.
- a conventionally known plate material used for a lithographic printing plate can be used without limitation.
- paper, paper laminated with plastic for example, polyethylene, polypropylene, etc.
- metal plate for example, aluminum, etc.
- plastic film for example, cellulose triacetate, cellulose butyrate, cellulose nitrate, polyethylene terephthalate, polyethylene naphthalate, etc.
- Particularly preferred supports include paper, polyester film, polyethylene terephthalate or aluminum plate.
- hydrophilicity In order to impart hydrophilicity to these supports, chemical treatment such as physical treatment such as plasma treatment or corona discharge, coating with hydrophilic resin, or immersion in a surfactant solution is used alone or in combination. Is preferably applied. Furthermore, it is preferable that the surface is roughened so that dampening water can be easily applied.
- a roughening method there is a method in which organic or inorganic fine particles are attached to the surface by coating or the like, and micro unevenness is imparted by this network structure.
- Other preferred examples include those in which a water-resistant hydrophilic layer is provided as a surface layer on an arbitrary support. As such a surface layer, for example, a layer composed of an inorganic pigment and a binder described in US Pat. No.
- the surface of the aluminum plate can be roughened by various methods. For example, it is performed by a method of mechanically roughening, a method of electrochemically dissolving and roughening the surface, and a method of selectively dissolving the surface chemically.
- the mechanical method known methods such as a ball polishing method, a brush polishing method, a blast polishing method, a buffing method, and a polishing method can be used.
- an electrochemical surface roughening method there is a method of performing alternating current or direct current in an electrolytic solution such as hydrochloric acid or nitric acid.
- a degreasing treatment with a surfactant, an organic solvent, an alkaline aqueous solution, or the like is performed in order to remove rolling oil on the surface, if desired.
- a water-soluble resin such as polyvinyl phosphonic acid, a polymer and copolymer having a sulfonic acid group in the side chain, polyacrylic acid, a water-soluble metal salt (for example, zinc borate) or Those having a primer such as a yellow dye or an amine salt are also suitable.
- ink jet plate making method of the present invention ink is ejected as droplets from an ink jet recording head based on image information by an ink jet printer loaded with a plate forming ink, and is deposited on a heated printing plate material.
- a printing plate is formed by evaporating and drying the solvent. And preferably, it is a method of simultaneously curing with active energy rays.
- the inkjet recording head used in the inkjet plate making method of the present invention may be an on-demand system or a continuous system.
- a discharge method an electro-mechanical conversion method (for example, a single cavity type, a double cavity type, a bender type, a piston type, a shear mode type, a shared wall type, etc.), an electro-thermal conversion method (for example, thermal ink jet) Any ejection method such as a mold, a bubble jet (registered trademark) mold, or the like may be used.
- the amount of ink droplets ejected from the head is preferably 0.5 picoliters or more and 7 picoliters or less, and particularly preferably 0.8 picoliters or more and 4 picoliters or less. If it is less than 0.5 picoliter, the droplets ejected from the head are likely to decrease in speed during flight due to air resistance, and the landing positions are likely to vary. In addition, when the amount of ink droplets exceeds 7 picoliters, the size of one dot increases, and of course the resolution as a printing plate decreases.
- a method of ejecting a plurality of droplets from one head by devising ejection, or a plurality of droplets can be ejected continuously and united during flight, and then landed.
- the form of the ink jet printer applicable to the present invention may be any system, but it is preferable to use a flat bed system or a drum system when producing a high-quality printing plate. Also preferred is a method in which the printer of the present invention is incorporated in a printing press and plate-making is performed on the printing press.
- Heating of printing plate As a heating method for the printing plate material, it is preferable to heat the plate material of the ink jet printer by incorporating a heating device, a temperature measuring device, a temperature control device, etc. in the device for holding and conveying the plate material.
- the heating temperature it is necessary to maintain a temperature higher than the minimum film-forming temperature (MFT) of the resin fine particles in the solvent composition constituting the plate forming ink to be used, preferably 40 ° C. or higher and 200 ° C. or lower.
- MFT minimum film-forming temperature
- the active energy ray as used in the present invention includes, for example, electron beam, ultraviolet ray, ⁇ ray, ⁇ ray, ⁇ ray, X ray and the like. However, it is dangerous to human body, easy to handle, and industrially used. Electron beams and ultraviolet rays are widely used.
- the amount of electron beam to be irradiated is preferably in the range of 0.1 to 30 Mrad. If it is less than 0.1 Mrad, a sufficient irradiation effect cannot be obtained, and if it exceeds 30 Mrad, the support or the like may be deteriorated.
- the light source is, for example, a low pressure, medium pressure, high pressure mercury lamp, metal halide lamp, xenon lamp having a light emission wavelength in the ultraviolet region, cold cathode tube, hot cathode having an operating pressure of 0.1 kPa to 1 MPa.
- tube and LED is used.
- the active energy ray is preferably irradiated within 0.001 to 1.0 seconds after ink landing, and more preferably 0.001 to 0.5 seconds. In order to form a high-definition image, it is particularly important that the irradiation timing is as early as possible.
- the active energy rays are first irradiated by the above-described method within 0.001 to 2.0 seconds after ink landing, and further the active energy rays are irradiated. It is one of.
- Example 1 Synthesis of Polymer Compound 1 >> 56 g of glycidyl methacrylate, 48 g of p-hydroxybenzaldehyde, 2 g of pyridine, and 1 g of N-nitroso-phenylhydroxyamine ammonium salt were placed in a reaction vessel and stirred in a hot water bath at 80 ° C. for 8 hours.
- the ion exchange resin is filtered, and Irgacure 2959 (manufactured by Ciba Japan Co., Ltd.) is mixed as a photopolymerization initiator at a ratio of 0.1 g with respect to 100 g of a 15% aqueous solution, and then diluted with ion exchange water. As a result, a 10% aqueous solution of polymer compound 1 was obtained.
- Preparation of image forming ink (Preparation of ink 1) 10% polymer compound 1 aqueous solution 3 parts by mass as solid content Resin fine particles (Johncrill 780, manufactured by BASF, MFT (water): 89 ° C., acid value: 46 mg KOH / g) 5 parts by mass as solid content PG (propylene glycol) 40 parts by weight Cyan pigment dispersion: Cab-o-jet 250C (manufactured by Cabot Corporation) 6 parts by mass Ion exchange water was added to each of the above additives to make the total amount 100 parts by mass.
- Resin fine particles Johncrill 780, manufactured by BASF, MFT (water): 89 ° C., acid value: 46 mg KOH / g) 5 parts by mass as solid content PG (propylene glycol) 40 parts by weight
- Cyan pigment dispersion Cab-o-jet 250C (manufactured by Cabot Corporation) 6 parts by mass Ion exchange water was added to each of the above additives to make
- ink 1 was prepared by performing filtration using a # 3500 mesh metal filter and deaeration using a hollow fiber module.
- ink 2 to ink 25 In the preparation of the ink 1, ink 2 to ink 25 were similarly prepared except that the type of resin fine particles, the type of water-soluble organic solvent, and the presence or absence of addition of the polymer compound 1 were changed as shown in Table 2. Prepared.
- J780 Jonkrill 780, manufactured by BASF, MFT (water): 89 ° C., acid value 46 mgKOH / g J790: Jonkrill 780, manufactured by BASF, MFT (water): 67 ° C., acid value 30 mgKOH / g SX8900C: manufactured by JSR, MFT (water): 53 ° C.
- PDX-7145 manufactured by BASF, MFT (water): 25 ° C., acid value: 32 mgKOH / g NM972: Nichigomo Vinyl 972, manufactured by Nippon Synthetic Chemical Co., Ltd., MFT (water): 105 ° C., acid value 2 mgKOH / g ⁇ Water-soluble organic solvent>
- PG Propylene glycol DMSO: Dimethyl sulfoxide
- DPG Dipropylene glycol 2-PD: 2-Pinolidinone
- TEG Triethylene glycol EG: Ethylene glycol 1,4-BD: 1,4-butanediol
- Gly Glycerin
- Solv1: DMSO / EG 80/20
- Solv2: DMSO / EG 50/50
- Solv3: DMSO / EG 20/80
- Solv4: DMSO / EG 10/90 ⁇
- Preparation of plate making >> Inkjet printer
- a piezo-type inkjet head having a nozzle diameter of 20 ⁇ m, a nozzle number of 512 nozzles, and a nozzle resolution of 300 dpi (dpi in the present invention represents the number of dots per 2.54 cm) is mounted on the carriage 1.
- Is an ink jet printer having a UV irradiation light source 2 and mounted on a carriage movement guide 5.
- the carriage 1 moved in the X direction in FIG. 1, and a grained aluminum plate 4 was fixed to the transport unit 3, and the entire surface was scanned by moving the transport unit 3 in the Y direction.
- the transport unit 3 has a heating means (not shown), a temperature measuring means (not shown) for measuring the temperature of the plate material, and a temperature control means (not shown) to keep the plate material at a constant temperature. Is possible.
- the temperature of the plate was heated to 60 ° C., and the temperature of the plate material was not heated and was 25 ° C.
- Light irradiation was performed under the condition of 120 W / cm from a metal halide lamp (manufactured by Nippon Battery Co., Ltd., MAL 400NL, power supply power 3 kW ⁇ hr) installed on both sides of the carriage.
- a metal halide lamp manufactured by Nippon Battery Co., Ltd., MAL 400NL, power supply power 3 kW ⁇ hr
- the carriage moving speed was evaluated under the condition of 400 mm / sec.
- the voltage applied to the piezo element of the printer was adjusted so that the amount of droplets was 1 picoliter for each ink.
- Each printing plate 1 to 27 was prepared using the ink type, the heating condition of the plate material, and the light irradiation condition as shown in Table 2.
- Table 2 shows the results obtained as described above.
- the image formed according to the ink jet plate-making method of the present invention is excellent in liquid side resistance and printing durability.
- Example 2 ⁇ Salt exchange of resin fine particles ⁇ Commercially available resin fine particles J780 (Jonkrill 780, manufactured by BASF, MFT (water): 89 ° C., acid value 46 mgKOH / g), J631 (Jonkrill 631, manufactured by BASF, MFT (water): 80 ° C., acid value 25 mgKOH / G), NM972 (Nichigomo Vinyl 972, manufactured by Nippon Synthetic Chemical Co., Ltd., MFT (water): 105 ° C., acid value 2 mgKOH / g), each was diluted with ion-exchanged water so that the solid content was 10%.
- ink 26 was prepared by performing filtration using a # 3500 mesh metal filter and deaeration using a hollow fiber module.
- Inks 27 to 43 were prepared in the same manner as in the preparation of the ink 26 except that the type of resin fine particles, the type of salt, and the type of water-soluble organic solvent were changed as shown in Table 3.
- FIG. 1 ⁇ Preparation of plate making>
- a piezo-type inkjet head having a nozzle diameter of 20 ⁇ m, a nozzle number of 512 nozzles, and a nozzle resolution of 300 dpi (dpi in the present invention represents the number of dots per 2.54 cm) is mounted on the carriage 1.
- Is an ink jet printer having a UV irradiation light source 2 and mounted on a carriage movement guide 5.
- the carriage 1 moved in the X direction in FIG. 1, and a grained aluminum plate 4 was fixed to the transport unit 3, and the entire surface was scanned by moving the transport unit 3 in the Y direction.
- the transport unit 3 has a heating means (not shown), a temperature measuring means (not shown) for measuring the temperature of the plate material, and a temperature control means (not shown), so that the plate material can be kept at a constant temperature. It is.
- the temperature of the plate material was heated to 60 ° C.
- the active energy rays were irradiated from a metal halide lamp (MAL 400NL, power source power 3 kW ⁇ hr, manufactured by Nippon Battery Co., Ltd.) installed on both sides of the carriage under a condition of 120 W / cm.
- a metal halide lamp MAL 400NL, power source power 3 kW ⁇ hr, manufactured by Nippon Battery Co., Ltd.
- Printing plates 28 to 45 were prepared using the inks shown in Table 3 under the condition of 700 mm / sec as the carriage moving speed, and the following evaluation was performed.
- the voltage applied to the piezo element of the printer was adjusted so that the amount of droplets in each ink was 1 picoliter.
- the image formed according to the ink jet plate making method of the present invention is excellent in liquid-side resistance and printing durability.
- the sodium salt exhibits a more excellent effect than the amine salt.
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Ink Jet Recording Methods And Recording Media Thereof (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
- Printing Plates And Materials Therefor (AREA)
Abstract
Description
先ず、樹脂微粒子の最低造膜温度(以下、MFTと呼ぶ。)について説明する。
次に本発明に係る樹脂微粒子について説明する。
本発明に係る樹脂微粒子の酸価は、10mgKOH/g以上であることが好ましく、より好ましくは30mgKOH/g以上である。保存性の観点からは、ノニオン性またはアニオン性であることが好ましい。
本発明における樹脂微粒子が有する酸の対塩としてはアルカリ金属塩であることが好ましく、アルカリ金属とは、リチウム、ナトリウム、カリウム、ルビジウム、セシウムを差し、すべて水溶液中では1価のカチオンイオンとして存在することができる。本発明においては、ナトリウム、カリウム、リチウムの使用が好ましいく、特にナトリウムが好ましい。
本発明に係る水溶性有機溶剤及び本発明が定義する樹脂微粒子のMFTを5℃以上低下させる水溶性有機溶剤(A)について説明する。
次に、本発明に好ましく用いられる活性エネルギー線架橋性高分子化合物について説明する。
本発明においては、光重合開始剤や増感剤を添加するのも好ましい。これらの化合物は、溶剤に溶解または分散した状態、もしくは感光性樹脂に対して化学的に結合されていてもよい。
本発明のインクジェット製版方法に用いられるインクは、着色剤を含有しないクリアインクでも構わないが、刷版に描いた図柄を簡単に識別する目的から着色剤を含有することが好ましい。
本発明で用いることのできる染料としては、特に制限はなく、酸性染料、直接染料、反応性染料等の水溶性染料、分散染料等が挙げられる。
本発明で用いることのできる水溶性染料としては、例えば、アゾ染料、メチン染料、アゾメチン染料、キサンテン染料、キノン染料、フタロシアニン染料、トリフェニルメタン染料、ジフェニルメタン染料等を挙げることができる。
また、分散染料としては、アゾ系分散染料、キノン系分散染料、アントラキノン系分散染料、キノフタロン系分散染料等種々の分散染料を用いることができる。
本発明において使用できる顔料としては、従来公知のものを制限なく使用でき、水分散性顔料、溶剤分散性顔料等何れも使用可能であり、例えば、不溶性顔料、レーキ顔料等の有機顔料及び、カーボンブラック等の無機顔料を好ましく用いることができる。この顔料は、インク中で分散された状態で存在させ、この分散の方式としては、自己分散、界面活性剤を用いた分散、ポリマー分散、マイクロカプセル分散の何れでも良い。
本発明に係るインクは、界面活性剤を含有しても良い。
本発明においては、その他に従来公知の添加剤を含有することができる。例えば、蛍光増白剤、消泡剤、潤滑剤、防腐剤、増粘剤、帯電防止剤、マット剤、水溶性多価金属塩、酸塩基、緩衝液等pH調整剤、酸化防止剤、表面張力調整剤、非抵抗調整剤、防錆剤、無機顔料等である。
本発明に係るインクは、高精細な刷版をインクジェット方法により安定に製造するために、好ましいインクの物性値の範囲が存在する。
本発明に係るインクは従来公知の方法により製造することができるが、製造工程の中で濾過を行うことが好ましい。濾過の方法としては例えば金属製のメッシュフィルターにより行うが、これと組み合わせてポリプロピレン等の樹脂製の体積濾過フィルターによる濾過を行うことも好ましい。
本発明のインクジェット製版方法に用いられる印刷版材は、表面が親水性であることが好ましい。印刷版材に用いられる支持体としては、従来公知の、平版印刷版に使用される版材を限定無く用いることができる。例えば、紙、プラスチック(例えば、ポリエチレン、ポリプロピレン等)がラミネートされた紙、金属版(例えば、アルミニウム等)、プラスチックフィルム(例えば、三酢酸セルロース、酪酸セルロース、硝酸セルロース、ポリエチレンテレフタレート、ポリエチレンナフタレート等)である。
本発明のインクジェット製版方法においては、版形成用インクを装填したインクジェットプリンタにより、画像情報に基づきインクジェット記録ヘッドからインクを液滴として射出させ、加熱した印刷用版材上に付着させ、インク中の溶剤を蒸発、乾燥させることにより印刷用刷版を形成する。そして、好ましくは、同時に活性エネルギー線により硬化させる方法である。
印刷用版材の加熱方法としては、インクジェットプリンタの版材を保持搬送する手段に加熱手段、温度測定手段、温度制御手段等を内蔵するにより加熱することが好ましい。加熱温度としては、用いられる版形成用インクを構成する溶剤組成における該樹脂微粒子の最低造膜温度(MFT)よりも高い温度に保つことが必要であり、好ましくは40℃以上、200℃以下であるが、実用上の観点からは、40℃以上、80℃の温度範囲で印刷用版材を加熱することがより好ましい。
本発明でいう活性エネルギー線とは、例えば電子線、紫外線、α線、β線、γ線、エックス線等が上げられるが、人体への危険性や、取り扱いが容易で、工業的にもその利用が普及している電子線や紫外線が好ましい。
活性エネルギー線の照射条件として、インク着弾後0.001~1.0秒の間に活性エネルギー線が照射されることが好ましく、より好ましくは0.001~0.5秒である。高精細な像を形成するためには、照射タイミングができるだけ早いことが特に重要となる。
活性エネルギー線の照射方法として、その基本的な方法が特開昭60-132767号に開示されている。これによると、ヘッドユニットの両側に光源を設け、シャトル方式でヘッドと光源を走査する。照射は、インク着弾後、一定時間を置いて行われることになる。更に、駆動を伴わない別光源によって硬化を完了させる。米国特許第6,145,979号では、照射方法として、光ファイバーを用いた方法や、コリメートされた光源をヘッドユニット側面に設けた鏡面に当て、記録部へUV光を照射する方法が開示されている。本発明の画像形成方法においては、これらの何れの照射方法も用いることができる。
《高分子化合物1の合成》
グリシジルメタクリレート56g、p-ヒドロキシベンズアルデヒド48g、ピリジン2g、及びN-ニトロソ-フェニルヒドロキシアミンアンモニウム塩1gを反応容器に入れ、80℃の湯浴中で8時間攪拌した。
(インク1の調製)
10%の高分子化合物1水溶液 固形分として3質量部
樹脂微粒子(ジョンクリル780、BASF社製、MFT(水):89℃、酸価:46mgKOH/g) 固形分として5質量部
PG(プロピレングリコール、沸点:187℃) 40質量部
シアン顔料分散液:Cab-o-jet250C(キャボット社製)
6質量部
以上の各添加剤にイオン交換水を加え、全量を100部質量とした。
上記インク1の調製において、樹脂微粒子の種類、水溶性有機溶剤の種類、高分子化合物1の添加の有無を、表2に記載の様に変更した以外は同様にして、インク2~インク25を調製した。
J780:ジョンクリル780、BASF社製、MFT(水):89℃、酸価46mgKOH/g
J790:ジョンクリル780、BASF社製、MFT(水):67℃、酸価30mgKOH/g
SX8900C:JSR社製、MFT(水):53℃
PDX-7145:BASF社製、MFT(水):25℃、酸価32mgKOH/g
NM972:ニチゴーモビニール972、日本合成化学社製、MFT(水):105℃、酸価2mgKOH/g
〈水溶性有機溶剤〉
PG:プロピレングリコール
DMSO:ジメチルスルホキシド
DPG:ジプロピレングリコール
2-PD:2-ピノリジノン
TEG:トリエチレングリコール
EG:エチレングリコール
1,4-BD:1,4-ブタンジオール
Gly:グリセリン
Solv1:DMSO/EG=80/20
Solv2:DMSO/EG=50/50
Solv3:DMSO/EG=20/80
Solv4:DMSO/EG=10/90
《製版の作製》
(インクジェットプリンタ)
図1に記載のインクジェットプリンタを使用した。ノズル口径20μm、ノズル数512ノズル、ノズル解像度300dpi(本発明でいうdpiとは、2.54cm当たりのドット数を表す。)のピエゾ方式のインクジェットヘッドをキャリッジ1に搭載し、キャリッジ1の両脇にはUV照射光源2を有し、これらをキャリッジ移動ガイド5に取り付けられたインクジェットプリンタである。キャリッジ1は、図1のX方向に移動し、搬送ユニット3には砂目立てしたアルミ版材4が固定され、搬送ユニット3をY方向に移動させることにより全面走査を行った。
版材とする砂目立てしたアルミ基材上に、インクを液滴量1ピコリットルで解像度1400dpi×1400dpiで像形成を行った。画像は目視評価用に10cm×10cmのベタ画像、細線画像、3ポイントから10ポイントの明朝体文字画像、自然画(写真)の画像を組み合わせたものを作成して用いた。
〔液寄り耐性1の評価〕
上記各画像記録方法に従って、自然画の画像部を中心にまだらの有無を目視観察し、下記の基準に従って液寄り耐性1の評価を行った。
○:まだらが僅かに認められる
△:一部で弱いまだらが認められるが、実用上許容範囲にある
×:やや強いまだらの発生が認められる
××:全面に強いまだらが認められ、実用に耐えない品質である
〔耐刷性の評価〕
作製した印刷版を印刷機にかけて、コート紙(北越製紙製)に20000枚印刷を行った。印刷の途中で1000枚印刷する毎に刷り上がった紙の細線部分の欠け、文字の欠けや潰れをルーペで確認し、欠陥が発生し出した枚数を記録した。
《樹脂微粒子の対塩交換》
市販の樹脂微粒子J780(ジョンクリル780、BASF社製、MFT(水):89℃、酸価46mgKOH/g)、J631(ジョンクリル631、BASF社製、MFT(水):80℃、酸価25mgKOH/g)、NM972(ニチゴーモビニール972、日本合成化学社製、MFT(水):105℃、酸価2mgKOH/g)について、それぞれ固形分量が10%になるようにイオン交換水で希釈した。次に、日東電工(株)製メンブレンマスターRUM-2小型ポンプユニットとメンブレンマスターC10-T薄層流式平膜テストセルを用いて、脱塩精製を行った。この際、適宜過剰量のアンモニア水またはアルカリ金属の塩化物と、イオン交換水とを添加することで対塩を、アミン塩、アルカリ金属にそれぞれ置換した。アンモニアあるいはアルカリ金属の塩化物を添加後に十分な時間の脱塩精製を行い、最終的には対塩が、アミン塩またはアルカリ金属に置換された各樹脂微粒子溶液を得た。
(インク26の調製)
10%の高分子化合物1(実施例1記載)水溶液 固形分として3質量部
樹脂微粒子(ジョンクリル780、BASF社製、MFT(水):89℃、酸価:46mgKOH/g、対塩:NH3) 固形分として5質量部
PG(プロピレングリコール、沸点:187℃) 40質量部
シアン顔料分散液:Cab-o-jet250C(キャボット社製)
6質量部
以上の各添加剤にイオン交換水を加え、全量を100部質量とした。
上記インク26の調製において、樹脂微粒子の種類と対塩、水溶性有機溶剤の種類を、表3に記載のの様に変更した以外は同様にして、インク27~インク43を調製した。
(インクジェットプリンタ)
図1に記載のインクジェットプリンタを使用した。ノズル口径20μm、ノズル数512ノズル、ノズル解像度300dpi(本発明でいうdpiとは、2.54cm当たりのドット数を表す。)のピエゾ方式のインクジェットヘッドをキャリッジ1に搭載し、キャリッジ1の両脇にはUV照射光源2を有し、これらをキャリッジ移動ガイド5に取り付けられたインクジェットプリンタである。キャリッジ1は図1のX方向に移動し、搬送ユニット3には砂目立てしたアルミ版材4が固定され、搬送ユニット3をY方向に移動させることにより全面走査を行った。
版材とする砂目立てしたアルミ基材上に、インクを液滴量1ピコリットルで解像度1400dpi×1400dpiで像形成を行った。画像は目視評価用に10cm×10cmのベタ画像、細線画層、3ポイントから14ポイントの明朝体抜き文字画像、自然画(写真)の画像を組み合わせたものを作成して用いた。
実施例1に記載の方法と同様にして耐刷性の評価と、下記の方法に従って液寄り耐性2の評価を行った。
上記700mm/secの条件で画像記録したベタ画像部のまだらの有無を目視観察し、下記の基準に従って液寄り耐性2の評価を行った。
○:まだらが僅かに認められる
△:一部で弱いまだらが認められるが、実用上許容範囲にある
×:やや強いまだらの発生が認められる
××:全面に強いまだらが認められ、実用に耐えない品質である
2 UV照射光源
3 搬送ユニット
4 アルミ版材
5 キャリッジ移動ガイド
Claims (10)
- 少なくとも、水と水溶性有機溶剤と樹脂微粒子を含有する版形成用インクを用い、加熱した印刷用版材上に該版形成用インクを付着させ、該版形成用インク中の溶剤を蒸発、乾燥することにより像形成を行うインクジェット製版方法において、該樹脂微粒子の最低造膜温度(MFT(水))が40℃以上であり、かつ、該版形成用インクは、該樹脂微粒子のMFTを5℃以上低下させる水溶性有機溶剤(A)を含有し、該水溶性有機溶剤(A)がインク中の全水溶性有機溶剤の20%以上であり、かつ該水溶性有機溶剤(A)の沸点が180℃以上、300℃以下であることを特徴とするインクジェット製版方法。
- 前記水溶性有機溶剤(A)が、全水溶性有機溶剤の80質量%以上であることを特徴とする請求項1記載のインクジェット製版方法。
- 前記水溶性有機溶剤(A)の沸点が、180℃以上、250℃以下であることを特徴とする請求項1または2記載のインクジェット製版方法。
- 該水溶性有機溶剤(A)の沸点が、180℃以上、200℃以下であることを特徴とする請求項1から3のいずれか1項に記載のインクジェット製版方法。
- 前記樹脂微粒子の酸価が、10mgKOH/g以上であることを特徴とする請求項1から4のいずれか1項に記載のインクジェット製版方法。
- 前記樹脂微粒子の酸価が、30mgKOH/g以上であることを特徴とする請求項1から5のいずれか1項に記載のインクジェット製版方法。
- 前記樹脂微粒子の酸の対塩が、アルカリ金属塩であることを特徴とする請求項1から6のいずれか1項に記載のインクジェット製版方法。
- 前記アルカリ金属塩が、ナトリウム塩であることを特徴とする請求項1から7のいずれか1項に記載のインクジェット製版方法。
- 前記版形成用インクが、主鎖に複数の側鎖を有し、活性エネルギー線を照射することにより、側鎖間で架橋結合可能な高分子化合物を含有し、該高分子化合物の含有量がインク全質量に対して、0.8質量%以上、5.0質量%以下であり、該高分子化合物の主鎖がポリ酢酸ビニルのケン化物であり、かつケン化度が77%以上、99%以下で、重合度が200以上、4000以下であることを特徴とする請求項1から8のいずれか1項に記載のインクジェット製版方法。
- 印刷用版材上に前記版形成用インクを付着させた後、活性エネルギー線を照射して像形成を行うことを特徴とする請求項9に記載のインクジェット製版方法。
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JP2010525628A JP5187398B2 (ja) | 2008-08-19 | 2009-06-09 | インクジェット製版方法 |
US13/058,917 US20110139026A1 (en) | 2008-08-19 | 2009-06-09 | Ink-jet platemaking method |
Applications Claiming Priority (2)
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JP2008210492 | 2008-08-19 | ||
JP2008-210492 | 2008-08-19 |
Publications (1)
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WO2010021186A1 true WO2010021186A1 (ja) | 2010-02-25 |
Family
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PCT/JP2009/060508 WO2010021186A1 (ja) | 2008-08-19 | 2009-06-09 | インクジェット製版方法 |
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US (1) | US20110139026A1 (ja) |
JP (1) | JP5187398B2 (ja) |
WO (1) | WO2010021186A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013525513A (ja) * | 2010-03-22 | 2013-06-20 | 中国科学院化学研究所 | インクジェットダイレクト製版用インクおよびその調製方法 |
JP2013539486A (ja) * | 2010-08-06 | 2013-10-24 | 中国科学院化学研究所 | インクジェット・コンピューター・トゥ・プレートに用いられるインクおよびその製造方法 |
JP2015187231A (ja) * | 2014-03-27 | 2015-10-29 | 東洋インキScホールディングス株式会社 | 製版用水性インクジェットインキおよび平版印刷用刷版の製版方法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2042304B1 (en) * | 2006-07-14 | 2013-01-02 | Konica Minolta Holdings, Inc. | Plate making method and planographic printing plate |
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JP2001225440A (ja) * | 1999-03-31 | 2001-08-21 | Fuji Photo Film Co Ltd | 製版方法及び製版装置 |
JP2003062966A (ja) * | 2001-08-27 | 2003-03-05 | Toyobo Co Ltd | 平版印刷用刷版及びその製版方法 |
WO2008007550A1 (fr) * | 2006-07-14 | 2008-01-17 | Konica Minolta Holdings, Inc. | Procédé de fabrication de plaque d'impression lithographique |
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JP2000218756A (ja) * | 1999-01-29 | 2000-08-08 | Hitachi Koki Co Ltd | ソリッドインク印刷原版およびその作製方法 |
JP2002127353A (ja) * | 2000-10-24 | 2002-05-08 | Fuji Photo Film Co Ltd | オフセット印刷方法及び印刷装置 |
US20090087779A1 (en) * | 2006-04-20 | 2009-04-02 | Konica Minolta Medical & Graphic, Inc. | Printing plate material |
JP2010046811A (ja) * | 2008-08-19 | 2010-03-04 | Konica Minolta Holdings Inc | インクジェット製版方法 |
-
2009
- 2009-06-09 JP JP2010525628A patent/JP5187398B2/ja not_active Expired - Fee Related
- 2009-06-09 US US13/058,917 patent/US20110139026A1/en not_active Abandoned
- 2009-06-09 WO PCT/JP2009/060508 patent/WO2010021186A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001225440A (ja) * | 1999-03-31 | 2001-08-21 | Fuji Photo Film Co Ltd | 製版方法及び製版装置 |
JP2003062966A (ja) * | 2001-08-27 | 2003-03-05 | Toyobo Co Ltd | 平版印刷用刷版及びその製版方法 |
WO2008007550A1 (fr) * | 2006-07-14 | 2008-01-17 | Konica Minolta Holdings, Inc. | Procédé de fabrication de plaque d'impression lithographique |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013525513A (ja) * | 2010-03-22 | 2013-06-20 | 中国科学院化学研究所 | インクジェットダイレクト製版用インクおよびその調製方法 |
US8846782B2 (en) | 2010-03-22 | 2014-09-30 | Institute Of Chemistry, Chinese Academy Of Sciences | Ink for inkjet computer-to-plate and preparation method of the same |
JP2013539486A (ja) * | 2010-08-06 | 2013-10-24 | 中国科学院化学研究所 | インクジェット・コンピューター・トゥ・プレートに用いられるインクおよびその製造方法 |
US8921459B2 (en) | 2010-08-06 | 2014-12-30 | Institute Of Chemistry, Chinese Academy Of Sciences | Ink used for ink-jet computer-to-plate and preparation method thereof |
JP2015187231A (ja) * | 2014-03-27 | 2015-10-29 | 東洋インキScホールディングス株式会社 | 製版用水性インクジェットインキおよび平版印刷用刷版の製版方法 |
Also Published As
Publication number | Publication date |
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JPWO2010021186A1 (ja) | 2012-01-26 |
US20110139026A1 (en) | 2011-06-16 |
JP5187398B2 (ja) | 2013-04-24 |
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