WO2008010393A1 - Procédé de fabrication de plaque et plaque d'impression - Google Patents

Procédé de fabrication de plaque et plaque d'impression Download PDF

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Publication number
WO2008010393A1
WO2008010393A1 PCT/JP2007/062889 JP2007062889W WO2008010393A1 WO 2008010393 A1 WO2008010393 A1 WO 2008010393A1 JP 2007062889 W JP2007062889 W JP 2007062889W WO 2008010393 A1 WO2008010393 A1 WO 2008010393A1
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WO
WIPO (PCT)
Prior art keywords
ink
plate
mass
active energy
energy ray
Prior art date
Application number
PCT/JP2007/062889
Other languages
English (en)
Japanese (ja)
Inventor
Hirotaka Iijima
Original Assignee
Konica Minolta Holdings, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Konica Minolta Holdings, Inc. filed Critical Konica Minolta Holdings, Inc.
Priority to JP2008525818A priority Critical patent/JPWO2008010393A1/ja
Publication of WO2008010393A1 publication Critical patent/WO2008010393A1/fr

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Classifications

    • 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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C09D11/101—Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
    • B41J11/00214—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation using UV radiation

Definitions

  • the present invention relates to a plate making method and a printing plate, and further relates to a plate making method using an ink jet recording method and a printing plate.
  • the printing method is a recording method in which ink is applied to a printing plate and transferred to a medium by pressure.
  • a hydrophilic part and a lipophilic part are formed on the surface of the printing plate according to image information.
  • dampening water is attached to the hydrophilic part, and printing is performed with the printing ink attached only to the oleophilic part.
  • a plate making method using an ink jet recording method is disclosed (for example, see Patent Document 1).
  • oil-based ink is applied on a printing plate material by an ink jet recording method.
  • resolution was lowered due to dating.
  • a plate making method in which a photocurable ink is attached to a printing plate material that has been subjected to a hydrophilic treatment by an inkjet method, and then the entire surface is exposed (for example, See Patent Document 2.).
  • this method does not provide a certain level of printing durability.
  • ink beading occurs immediately before exposure and beading occurs immediately before exposure, and that resolution tends to decrease and dot gain tends to occur.
  • a special ink jet recording head having a high discharge viscosity and a high ink viscosity is required.
  • an acrylate compound is used as a photocurable monomer, and a photocurable ink comprising a reactive diluent, a photopolymerization initiator, a solvent and a dye is used as a printing plate material.
  • a plate making method using a solvent-containing type ultraviolet curable ink is disclosed in which an image is formed by applying and curing an image portion by light irradiation (see, for example, Patent Document 3).
  • a water-based ultraviolet curable ink containing an a-heterometathalyl compound as a water-soluble polymerization compound and containing a coloring material is ejected onto a hydrophilic support and irradiated with ultraviolet rays.
  • plate-making method is disclosed for forming an image of hydrophobic while 0 tooth force, in this way, bi until even exposure impact force.
  • the resolution was liable to decrease as soon as the recording occurred.
  • Another problem is that the ink density of the printing ink in the image area is insufficient and the density of the printed image varies.
  • Patent Document 1 Japanese Patent Laid-Open No. 56-62157
  • Patent Document 2 JP-A-4-69244
  • Patent Document 3 Japanese Patent Laid-Open No. 63-102936
  • Patent Document 4 Column 2006-117795 Disclosure of the invention
  • the present invention has been made in view of the above problems, and its purpose is to make use of the convenience and productivity of the ink jet system and the features of the plate making of the ink jet system, which is a problem in printing durability.
  • An object of the present invention is to provide a plate making method and a printing plate that improve the resolution and enable high-sensitivity, low-viscosity ink-jet ink making with a simple apparatus.
  • a printing plate is formed by depositing a plate-forming ink on a printing plate by an inkjet recording method, irradiating active energy rays, and evaporating and drying the ink solvent to form an image.
  • the plate-forming ink comprises at least water and an active energy ray crosslinkable compound that is cured by irradiation with the active energy ray, based on 0.8% by mass of the total mass of the ink.
  • a plate making method characterized by containing 0.1% by mass or more and 7% by mass or less of fine resin particles containing 30.0% by mass or less and having an average particle diameter of 5 nm or more and 150 nm or less.
  • Active energy ray crosslinkable compound cured by irradiation of the active energy ray Force The main chain has a plurality of side chains, and the active energy ray is irradiated to bridge between the side chains.
  • the plate-making method as described in 1 above, which is a bondable polymer compound, and the polymer compound is 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 main chain of the polymer compound is a polyvinyl acetate kenich, and the degree of saponification is
  • the printing durability and resolution which were problems in the ink jet system platemaking, are improved, and the composition has high curing sensitivity and low viscosity.
  • this inkjet ink it was possible to provide a plate making method and a printing plate that enable plate making with a simple apparatus.
  • FIG. 1 is a perspective view showing an example of an ink jet printer applicable to the plate making method of the present invention.
  • the present inventor has applied an active energy ray after depositing a plate-forming ink on a printing plate material by an ink jet recording method.
  • the plate making method for producing a printing plate by forming an image by evaporating and drying an ink solvent the plate forming ink is at least water and an active energy ray crosslinkable material that is hardened by irradiation of the active energy ray.
  • the resin fine particles containing 0.8% by mass or more and 30.0% by mass or less of the total amount of the ink with respect to the total mass of the ink and having an average particle size of 5 nm or more and 150 nm or less are 0.1% by mass.
  • the plate-making method is characterized by the fact that it contains at least 7% by mass and up to 7% by mass, making use of the high convenience and productivity of the ink jet method, and the printing durability and resolving power that were problems in ink-jet method plate making. Improved hardening feeling A plate-making method that enables plate-making with a simple device using inkjet ink with low viscosity and low viscosity. I was able to.
  • the conventional active energy ray-curable inkjet ink has a curable resin content even when all of the constituent materials are composed of a curable component or contain an organic solvent or water. If it is not increased, it will harden, and there is a problem that practical sensitivity (the amount of light required to reach a hardness with sufficient printing durability) cannot be obtained.
  • the amount of curable resin necessary for curing is added, the viscosity of the ink jet ink exceeds 20 mPa ⁇ s, and there are many problems in ejection by the ink jet recording method.
  • a water-soluble active energy ray crosslinkable compound is used, and the active energy line crosslinkable compound is not less than 0.8% by mass based on the total mass of the ink.
  • One of the characteristics is to contain 0% by mass or less.
  • the water-soluble active energy ray crosslinkable compound according to the present invention is lyophilic before cross-linking and dissolves in water or a water-soluble organic solvent. As a result, the printing durability and water resistance can be improved.
  • the water-soluble active energy ray crosslinkable compound is increased in hydrophobicity by cross-linking and forms an image portion to which ink adheres.
  • the curing component used in the conventional active energy ray-curable ink has a small molecular weight of the curing component and does not have hardness unless many curing components are crosslinked. It is necessary, and if the addition amount is small, the sensitivity is lowered. Accordingly, since a large amount of the curing component is required, the viscosity of the ink is inevitably increased.
  • the water-soluble active energy ray crosslinkable compound according to the present invention is a small amount of 0.8 mass% or more and 30.0 mass% or less with respect to the total mass of the plate forming ink. Curing became possible.
  • the curing component contained in the plate-forming ink according to the present invention preferably has a structure in which a crosslinking group is added as a side chain to the main chain of the high molecular weight component. Although the mechanism is unknown due to this structure, curing was possible in an extremely small amount of 0.8% by mass or more and 5.0% by mass or less based on the total mass of the plate forming ink.
  • the polymer compound is a saponified product of polyacetic acid bull
  • the degree of saponification is 77 to 99%
  • the degree of polymerization is 200 or more and 4000 or less
  • the sensitivity is remarkably improved. If the degree of polymerization is less than S4000, an excessive increase in ink viscosity can be suppressed and stable irradiation can be prevented. Output performance can be obtained.
  • the side chain modification rate is 0.8 mol% or more and 6 mol% or less, the sensitivity is remarkably improved.
  • the plate-forming ink according to the present invention has a small amount of the curing component, it is possible to contain a large amount of the evaporation component in the plate-forming ink. By containing a large amount of evaporating components, the thickness of the image formed on the printing plate after drying and curing is reduced, making it possible to produce a high-quality printing plate with reduced dot gain. .
  • the plate forming ink according to the present invention comprises 0.1% by mass or more of fine resin particles having an average particle diameter of 5 nm or more and 150 nm or less with respect to the total mass of the ink. It is characterized by containing 7% by mass or less, and by adopting these constitutions, the ink-inking property of printing ink is improved.
  • the average particle diameter of the fine resin particles is one of the important factors in the plate making method using ink jet. If the average particle size of the resin fine particles is 5 nm or more, an effect of improving the ink landing property can be obtained. If the average particle size is 150 nm or less, stable emission from the ink jet head can be maintained, and high landing accuracy can be achieved.
  • the addition amount of the fine resin particles is a factor affecting the inking property itself, and if it is 0.1% by mass or more, an effect on the inking property can be obtained, and if it is 7% by mass or less. Sufficient fillability can be obtained, and nozzle clogging and the like during intermittent emission can be suppressed, and excellent emission stability can be realized.
  • the fine resin particles are fused to each other on the plate material.
  • Think V This is presumed to improve ink fillability and scratch resistance.
  • the plate-forming ink contains at least water and an active energy ray crosslinkable compound that cures upon irradiation of the active energy line with respect to the total mass of the ink. It is characterized by containing 30.0 mass% or less.
  • the water-soluble active energy ray crosslinkable compound applicable to the present invention include, for example, a radical polymerizable compound having a radical polymerizable ethylenically unsaturated bond (for example, an acrylate compound).
  • Cationic polymerizable compounds for example, oxetane compounds, epoxy compounds, vinyl ether compounds, etc.
  • oxetane compounds for example, epoxy compounds, vinyl ether compounds, etc.
  • a polymer compound having a plurality of side chains in a hydrophilic main chain and capable of crosslinking between the side chains by irradiation with active energy rays for example, described in JP-A-2006-117795 A-heterometathalyl compounds and a polymer compound having a plurality of side chains in a hydrophilic main chain and capable of crosslinking between the side chains by irradiation with active energy rays.
  • the amount of the active energy line crosslinkable compound can be reduced.
  • the active energy line crosslinkable compound contains a plurality of active energy line crosslinkable compounds in the main chain.
  • the Rukoto be irradiated with an active energy ray, preferably a crosslinkable polymer compound between the side chains.
  • the polymer compound having a plurality of side chains in the main chain according to the present invention and capable of being cross-linked between the side chains by irradiating with active energy rays is a polyvinyl acetate cane or polyvinyl acetal.
  • Polyethylene oxide, polyalkylene oxide, polybutylpyrrolidone, polyacrylamide, polyacrylic acid, hydroxyethyl cellulose, methyl cellulose, hydroxypropyl cellulose, or derivatives of these resins, and copolymers thereof are also selected from the group consisting of At least one kind of rosin is introduced with a modifying group such as a photodimerization type, a photodecomposition type, a photopolymerization type, a photomodification type, and a photodepolymerization type in the side chain.
  • the photopolymerizable crosslinkable group is desirable from the viewpoint of sensitivity and image performance to be formed.
  • the degree of polymerization is preferably 200 or more, 4000 or less, force S, preferably 200 from the viewpoint of ease of introduction of side chains and handling!
  • the viewpoint power of handling is more preferably 2 000 or less.
  • the modification rate of the side chain with respect to the main chain is preferably 0.3 mol% or more and 6 mol% or less, but more preferably 0.8 mol% or more and 6 mol% or less from the viewpoint of reactivity. If the modification rate of the side chain with respect to the main chain is 0.3 mol% or more, sufficient crosslinkability can be obtained and the effects of the present invention can be exerted. If it is 6 mol% or less, the crosslink density is low. Generation of a hard and brittle film that does not increase excessively and a decrease in film strength can be prevented.
  • Preferred examples of the photodimer type modifying group include those having a diazo group, a cinnamoyl group, a stilbazonium group, a stilquinolium group or the like introduced therein, for example, JP-A-60-129742.
  • the photosensitive resin described in JP-A-60-129742 is a compound represented by the following general formula (1) in which a stilbazome group is introduced into a polyvinyl alcohol structure.
  • R represents an alkyl group having 1 to 4 carbon atoms
  • the photosensitive resin described in JP-A-56-67309 has a 2 azide 5 -trophenyl-carboxylethylene structure represented by the following general formula (2) in a polyvinyl alcohol structure, or It is a resin composition represented by the following general formula (3) and having a 4 azido 3-tro-phenol-carboxyethylene structure.
  • a modifying group represented by the following general formula (4) is also preferably used. [0045] [Chemical 3]
  • R represents an alkylene group or an aromatic ring.
  • a benzene ring is preferred.
  • Examples of the photopolymerization-type modifying group include, for example, JP-A-2000-181062 and JP-A-2004-189.
  • a coffin represented by the following general formula (5) shown in No. 841 is preferred from the viewpoint of reactivity.
  • R represents a methyl group or a hydrogen atom
  • n represents 1 or 2.
  • X represents — (CH 2) —COO— or —O—
  • Y represents an aromatic ring or a single bond.
  • M represents an integer of 0-6.
  • R represents a methyl group or a hydrogen atom, and R represents 2 to 1 carbon atoms.
  • 0 represents a linear or branched alkylene group.
  • One of the characteristics of the active energy ray-crosslinking type resin is that it is 0.8% by mass or more and 30.0% by mass or less based on the total mass of the ink. When present in an amount of 8% by mass or more, the crosslinking efficiency is improved, and beading or force bleed is more preferable due to a rapid increase in ink viscosity after crosslinking. If it is 5.0% by mass or less, it will adversely affect the physical properties of the ink and the internal state of the ink head, which is preferable from the viewpoint of the emission properties and the ink storage stability.
  • the active energy ray-crosslinking polymer compound according to the present invention the main chain originally having a certain degree of polymerization is crosslinked via a crosslink between side chains. Therefore, the effect of increasing the molecular weight per photon is remarkably large with respect to the active energy ray-curable resin that is polymerized through a general chain reaction. On the other hand, in the conventionally known active energy ray-curable resin, the number of cross-linking points cannot be controlled, so the physical properties of the cured film cannot be controlled.
  • 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.
  • a photopolymerization initiator and a sensitizer can be added. These compounds may be dissolved or dispersed in a solvent, or may be chemically bonded to the photosensitive resin.
  • the photopolymerization initiator and the photosensitizer to be applied are not particularly limited, but a water-soluble material is preferable from the viewpoints of miscibility and reaction efficiency.
  • a water-soluble material is preferable from the viewpoints of miscibility and reaction efficiency.
  • 4- (2-hydroxyethoxy) ferro- (2 -Hydroxy 2-propyl) ketone (HMPK), thixanthone ammonium salt (QTX), and benzophenone ammonium salt (ABQ) are preferred from the viewpoint of miscibility with aqueous solvents.
  • n represents an integer of 1 to 5.
  • benzophenones such as benzophenone, hydroxybenzophenone, bis-N, N-dimethylaminobenzophenone, bis-N, N-demethylaminobenzophenone, 4-methoxy-A! -Dimethylaminobenzophenone.
  • Thioxanthones such as thixatone, 2,4-diethylthioxanthone, isopropyl thixanthone, black thioxanthone and isopropoxycyclo thixanthone.
  • Anthraquinones such as ethylanthraquinone, benzanthraquinone, aminoanthraquinone, black anthraquinone; Acetophenone.
  • Benzoin ethers such as benzoin methyl ether.
  • photopolymerization initiators In addition to these photopolymerization initiators, accelerators and the like can also be added. Examples of these include ethyl dimethylaminobenzoate, isoamyl pdimethylaminobenzoate, ethanolamine, diethanolamine, triethanolamine and the like. These photopolymerization initiators are preferably grafted onto the side chain with respect to the main chain.
  • the resin fine particles according to the present invention are not particularly limited, but are preferably polyurethane, polystyrene acrylic, polystyrene butadiene, polystyrene maleic acid, polyester, polyether, polycarbonate, polyamide, polyacrylonitrile, polystyrene, polybutadiene, polyacrylic.
  • the resin fine particles include a copolymer selected from at least one of polyurethane, polystyrene monoacrylic, polystyrene monobutadiene, and polystyrene maleic acid.
  • one of the characteristics is that the average particle diameter of the fine resin particles is 5 nm or more and 150 nm or less. If the average particle size of the resin fine particles is 5 nm or more, an improvement effect on the ink-inking properties can be obtained, and if the particle size is 150 nm or less, the emission stability from the ink jet head can be maintained. In addition, it is possible to achieve improvements in fine line reproducibility and small character reproducibility in the production of printing plates that require a high landing system.
  • the average particle diameter of the fine resin particles according to the present invention 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 fine resin particles according to the present invention includes: One characteristic is that it is 0.1% by mass or more and 7% by mass or less with respect to the total mass of the ink. 1S 0.1% by mass or more and 5% by mass or less is more preferable.
  • the content of the fine resin particles according to the present invention is 0.1% by mass or more, the effect of excellent inking property can be exhibited, and when it is 7% by mass or less, sufficient inking property is obtained.
  • the viscosity of the ink increases due to the addition of the resin fine particles, and as the ink viscosity increases, it becomes impossible to eject at a high driving frequency, leading to a decrease in productivity. become. Therefore, when the ink viscosity is taken into consideration, the addition amount is preferably 5% by mass or less.
  • the fine resin 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 to the resin and dispersed.
  • a hydrophilic group or a hydrophilic segment is added to the resin and dispersed.
  • Surfactant is often used as an emulsifier
  • 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 in addition to latex in which polymer particles that are uniform throughout the particle are dispersed, latex in which core-shell type polymer particles having different compositions at the center and outer edges of the particles are dispersed.
  • This type of latex can also be used favorably.
  • the resin fine particles according to the present invention are preferably noon or arion from the viewpoint of storage stability, and more preferably arion.
  • anionic resin fine particles anionic groups are neutralized with a base and used.
  • a base such as ammonia or dimethylethanolamine is preferably used.
  • the organic base is volatile and evaporates after plate formation, but after the organic base evaporates, water solubility decreases and water resistance improves. This can be expected to improve the durability of printing plates that are constantly exposed to water.
  • the fine resin particles according to the present invention preferably have a glass transition point (Tg) of -20 ° C or higher and 70 ° C or lower. If the glass transition point is -20 ° C or higher, the scratch resistance and abrasion resistance when used as a plate can be maintained, and if the glass transition point is 70 ° C or lower, Smoothness can be achieved without leaving the shape of the fine oil particles, and the resin can have a sufficient hardness range.
  • the glass transition point (Tg) can be measured by a known method utilizing the fact that the coefficient of thermal expansion and specific heat change discontinuously in the process of changing the temperature.
  • the ink used in the 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.
  • the content is preferably 0.1% by mass or more and 3% by mass or less based on the total amount of the ink.
  • the colorant may be a dye or a pigment.
  • Examples of the dye that can be used in the present invention include acidic dyes, direct dyes, water-soluble dyes such as reactive dyes, disperse dyes, and the like that are not particularly limited.
  • water-soluble dyes examples include azo dyes, methine dyes, azomethine dyes, xanthene dyes, quinone dyes, phthalocyanine dyes, triphenylmethane dyes, diphenylmethane dyes, and the like.
  • R represents a hydrogen atom or a substitutable substituent
  • R may be different hydrogen atom or substitution
  • R is a hydrogen atom or a substitutable substituent
  • R represents a hydrogen atom or an alkyl group.
  • R is a hydrogen atom or a replaceable position
  • R may be different and may be a hydrogen atom.
  • 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, which may be substituted with a substitutable substituent, substituted with a sulfonic acid group or a carboxyl group! It is preferable to speak.
  • Y represents a hydrogen ion, a sodium ion, a potassium ion, a lithium ion, an ammonium ion or an alkyl ammonium ion.
  • R may be different hydrogen
  • the substituent which can be substituted on an atom or a naphthalene ring is represented.
  • q represents 1 or 2;
  • p represents an integer of 1 to 4.
  • 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 and W may be different halogen atoms
  • disperse dye various disperse dyes such as azo disperse dyes, quinone disperse dyes, anthraquinone disperse dyes, and quinophthalone disperse dyes can be used.
  • pigments that can be used in the present invention
  • any of water-dispersible pigments, solvent-dispersible pigments and the like can be used, for example, organic pigments such as insoluble pigments and lake pigments, An inorganic pigment such as carbon black can be preferably used.
  • This pigment is present in a state of being dispersed in the ink, and the dispersion method may be any of self dispersion, dispersion using a surfactant, polymer dispersion, and microcapsule dispersion.
  • insoluble pigments include, but are not limited to, for example, azo, azomethine, methine, diphenylenomethane, triphenylenomethane, quinacridone, anthraquinone, perylene, indigo, quinophthalone, isoindolinone, Preference is given to isoindoline, azazine, tadazine, thiazine, dioxazine, thiazole, phthalocyanine, diketopyrrolopyrrole and the like.
  • Specific pigments that can be preferably used include the following pigments.
  • pigments for magenta or red include CI pigment red 2, CI pigment red 3, CI pigment red 5, CI pigment red 6, CI pigment red 7, CI pigment red 15, CI Pigment Red 16, CI Pigment Red 48: 1, CI Pigment Red 53: 1, CI Pigment Red 57: 1, CI Pigment Red 122, C.I. Pigment ⁇ Red 123, CI Pigment ⁇ Red 139 , CI Big Men ⁇ Red 144, CI CI Meng Red 149, CI Big Men Red 166, CI Big Men Red 177, CI Pigmen Red 178, CI Big Men Red 202, CI Big Men Red 222, CI Big Men Red Violet 19 and the like.
  • Examples of pigments for orange or yellow include CI pigment orange 31, CI pigment orange 43, CI pigment yellow 12, CI pigment yellow 13, CI pigment yellow 14, CI pigment Yellow 15, CI pigment yellow 15: 3, CI pigment yellow 17, CI pigment yellow 74, CI pigment yellow 93, CI pigment yellow 128, CI pigment yellow 94, CI pigment yellow 138, etc. .
  • pigments for green or cyan include CI pigment blue 15, CI pigment blue 15: 2, CI pigment blue 15: 3, CI pigment blue 16, CI pigment blue 60, CI pigment Gmento Green 7 and so on.
  • Examples of the pigment for black include C.I. pigment black 1, C.I. pigment black 6, C.I. pigment black 7, and the like.
  • the average particle diameter 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. The accuracy of the diameter region is frequently used.
  • the pigment used in the ink according to the present invention is preferably used after being dispersed by a disperser together with a dispersant and other additives required depending on the desired properties.
  • a disperser a conventionally known ball mill, sand mill, line mill, high-pressure homogenizer, or the like can be used.
  • the dispersion method using a sand mill is preferable because the particle size distribution of the ink to be produced is sharp.
  • the material of the beads used for sand mill dispersion is preferably zircon or zircon from the viewpoint of contamination of bead fragments and ionic components.
  • the bead diameter is 0.3mn! ⁇ 3mm is preferred.
  • a surfactant or a polymer dispersant may be used alone or in combination as the dispersant.
  • the solvent constituting the ink according to the present invention contains at least water, and may further contain a water-soluble organic solvent.
  • the total amount of the solvent (water alone or a mixture of water and a 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 based on the total amount of the ink. More preferably, it is at least 98% by mass. Furthermore, water is 5% of the total ink. The content is preferably 0% by mass or more and 80% or less.
  • 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, and polyoxyalkylene alkyls.
  • Nonionic surfactants such as ether phosphates and fatty acid salts, polyoxyethylene alkyl ethers, polyoxyalkylene alkyl phenol ethers, acetylene glycols, polyoxyethylene polyoxypropylene block copolymers, etc.
  • Examples thereof include cationic surfactants such as ionic surfactants, devicessyl esters, sorbitan esters, polyoxyethylene fatty acid amides, amine oxides, alkylamine salts, and quaternary ammonium salts.
  • cationic surfactants such as ionic surfactants, devicessyl esters, sorbitan esters, polyoxyethylene fatty acid amides, amine oxides, alkylamine salts, and quaternary ammonium salts.
  • surfactants can also be used as dispersants for pigments.
  • anionic and nonionic surfactants can be preferably used.
  • additives can be contained.
  • fluorescent brighteners, antifoaming agents, lubricants, preservatives, thickeners, antistatic agents, matting agents, water-soluble polyvalent metal salts, acid bases, buffer solutions, etc.pH adjusters, antioxidants, surfaces are tension adjusting agents, specific resistance adjusting agents, antifungal agents, 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 ImPa's to 15 mPa's, particularly preferably from 2 mPa's to 8 mPa's. If the viscosity is ImPa's or higher, stable injection is possible, and if the viscosity is 15 mPa's or lower, satellites can be prevented from being generated, and ink can be ejected at a fast repetition cycle, resulting in an increase in production speed. To do.
  • the surface tension of the ink is preferably 25 mNZm or more and 50 mNZm or less, more preferably 30 mNZm or more and 45 mNZm or less. If it is 25mNZm or more, it will land on the printing plate. It is possible to control the wetting and spreading of the dots, and to achieve a good resolution. On the other hand, if it is 50 mN / m or less, bubbles are sufficiently removed from the ink jet recording head, and good ejection stability can be maintained.
  • the ink according to the present invention is preferably subjected to filtration in the course of a force production process that can be produced by a conventionally known method.
  • a filtration method for example, force that can be performed with a metal mesh filter, it is also preferable to perform filtration with a volume filtration filter made of a resin such as polypropylene in combination with this.
  • the ink according to the present invention is preferably subjected to a deaeration process.
  • Degassing methods include, for example, a method of performing deaeration 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 hollow fibers.
  • the method using a force degassing module is particularly preferred.
  • the printing plate material used in the plate making method of the present invention preferably has a hydrophilic surface.
  • the support used for the printing plate material conventionally known plate materials used for lithographic printing plates can be used without limitation.
  • plastic eg, polyethylene, polypropylene, etc.
  • metal plate eg, aluminum, etc.
  • plastic film eg, cellulose triacetate, cellulose butyrate, cellulose nitrate, polyethylene terephthalate, polyethylene naphthalate Phthalate).
  • the support include paper, polyester film, polyethylene terephthalate or aluminum plate.
  • the surface of the aluminum plate can be roughened by various methods. For example, it is carried out by a method of mechanically roughening, a method of electrochemically dissolving and roughening the surface, and a method of selectively dissolving the surface.
  • a method of mechanically roughening a known method such as a ball polishing method, a brush polishing method, a blast polishing method, or a puff polishing method can be used.
  • an electrochemical surface roughening method there is a method of performing alternating current or direct current in an electrolyte such as hydrochloric acid or nitric acid.
  • a degreasing treatment with, for example, a surfactant, an organic solvent, an alkaline aqueous solution, or the like is performed in order to remove the rolling oil on the surface, if desired.
  • water-soluble rosin such as polyvinylphosphonic acid, polymers and copolymers having sulfonic acid groups in the side chain, polyacrylic acid, water-soluble metal salts (for example, Zinc borate) or a primer coated with a yellow dye, amine salt or the like is also suitable.
  • ink is ejected as droplets from an ink-jet recording head based on image information by an ink-jet printer loaded with plate-forming ink, and is attached to a printing plate material. After curing, an ink solvent is evaporated and dried to form a printing plate.
  • the ink jet recording head used in the plate making method of the present invention may be an on-demand system or a continuous-use system.
  • Discharge methods include electromechanical conversion methods (eg, single-cavity type, double-cavity type, bender type, piston type, shear mode type, shared wall type, etc.), electrothermal conversion type (for example, thermal-in type) 1) A misaligned discharge method may be used.
  • the amount of ejected ink droplets is preferably 0.5 picoliters or more and 7 picoliters or less, and more preferably 0.8 picoliters or more and 4 picoliters or less. If the amount of ink droplets is 0.5 picoliter or more, the droplets ejected from the head can have a stable flying performance without being affected by air resistance, and the accuracy of the landing position is improved. In addition, if the amount of ink liquid is 7 picoliters or less, one dot size can be prevented from becoming too large, and high resolution as a printing plate can be realized.
  • 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. It is also preferable to incorporate an ink jet printer into the printing press and make a plate on the printing press.
  • the active energy ray as used in the present invention means, for example, electron beam, ultraviolet ray, ⁇ ray, j8 ray, ⁇ ray.
  • X-rays and the like can be mentioned, but handling with low risk to the human body is easy, and its use is widespread industrially, and electron beams and ultraviolet rays are preferred.
  • the amount of electron beam to be irradiated is preferably in the range of 0.1 to 30 Mrad. If it is 0.1 Mrad or more, a sufficient irradiation effect can be obtained, and if it is 30 Mrad or less, adverse effects on the support and the like can be eliminated, which is preferable.
  • 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, or a cold cathode tube having an operating pressure of 0.1 lkPa to IMPa.
  • a low pressure, medium pressure, high pressure mercury lamp, metal halide lamp, xenon lamp having a light emission wavelength in the ultraviolet region or a cold cathode tube having an operating pressure of 0.1 lkPa to IMPa.
  • Conventionally known materials such as hot cathode tubes and LEDs are used.
  • the irradiation condition of the active energy ray is preferably 0.001 to 0.5 seconds, more preferably 0.001 to 1.0 seconds after the ink landing. In order to form a high-definition image, it is particularly important that the irradiation timing is as early as possible. [0123] [Installation of lamps]
  • the irradiation of active energy rays is divided into two stages. First, the active energy rays are irradiated by the above-described method within 0.001 to 2.0 seconds after ink landing, and further the active energy rays are irradiated. Also preferred is one of the embodiments.
  • Ilgacure 2959 (manufactured by Chino Specialty Chemicals) is mixed as a photopolymerization initiator at a rate of 0.1 lg with respect to 15% aqueous solution lOOg, followed by ion exchange. Dilution with water gave a 10% polymer compound 1 aqueous solution.
  • the degree of polymerization and the degree of polymerization of the polyvinylacetate were changed as necessary, and the amount of p- (3-methacryloxy-2-hydroxypropyl) benzaldehyde charged was adjusted.
  • the modification rate was adjusted to obtain 10% aqueous solutions of polymer compounds 2 to 11 shown in Tables 2 and 3.
  • Ion exchanged water was added to the above, and the whole amount was stirred and mixed.
  • the total amount of ion-exchanged water was 100 parts as described above, and ink 2 was prepared by filtration and deaeration in the same manner as ink 1.
  • Inks 3 to 30 were prepared in the same manner as in the preparation of Ink 2, except that the polymer compound, the resin fine particles, and the ink composition were replaced with the compounds shown in Tables 2 and 3.
  • the total amount of ion-exchanged water was 100 parts as described above, and ink 31 was prepared by filtration and deaeration in the same manner as ink 1.
  • Inks 32 to 35 were prepared in the same manner as in the preparation of the ink 31 except that the polymer compound, the resin fine particles, and the ink composition were changed to the respective compounds shown in Table 3.
  • Table 1 shows the details of each resin fine particle used in the preparation of the inks:! To 31.
  • the Jonkrill series is manufactured by Johnson Polymer Co., Ltd.
  • the Superflex series is manufactured by Daiichi Kogyo Seiyaku Co., Ltd.
  • the SX series is manufactured by Nippon Zeon Co., Ltd. .
  • CAB Cab o -jet250C (cyan pigment)
  • the inkjet printer shown in Fig. 1 was used. Nozzle diameter 20 im Nozzle number 512 Slurry, nozzle resolution 300dpi (dpi in the present invention means 2.5 dots per 54cm) is mounted on carriage 1 with 8 piezo inkjet heads, and UV irradiation light source 2 on both sides of carriage 1 This is a flatbed ink jet printer. Carriage 1 moves in the X direction in Fig. 1 and moves in the Y direction by moving plate 4 with transport roller 3 on the flat bed.
  • the ink was cured under conditions of 120 WZcm from a metal halide lamp (MAL 400NL power supply power 3 kW 'manufactured by Nippon Battery Co., Ltd.) installed on both sides of the carriage.
  • a metal halide lamp MAL 400NL power supply power 3 kW 'manufactured by Nippon Battery Co., Ltd.
  • A The image of the entire printing plate does not peel off at all even after rubbing 200 times.
  • the prepared printing plate was placed on a printing machine and printed on coated paper (SA Kanofuji: Oji Paper Co., Ltd.). The state of the solid image portion that was printed was visually observed, and the inking property was evaluated according to the following criteria.
  • A The density of the solid part that has been printed is high and good, and no unevenness is observed in the solid image part.
  • O The density of the solid part that has been printed is slightly uneven in the solid image part.
  • ⁇ The density of the printed solid part is slightly low and unevenness is observed.
  • the prepared printing plate was placed on a printing machine and printed on coated paper (OK Kanfuji: made by Oji Paper Co., Ltd.).
  • the printing durability was evaluated according to the criteria shown in.
  • Printing plates for printing 3cm x 3cm 15% halftone patches were prepared at the four corners of A3 size printing plates, and printed on coated paper (OK Kanfuji: made by Oji Paper Co., Ltd.).
  • the dot percentage of the printed patch was measured using X-rite 528 (manufactured by X-rite), and the dot gain was evaluated according to the following criteria.
  • ink viscosity at 25 ° C was measured using VM-1AL (manufactured by CBC Materials) as a vibratory viscometer, and ink viscosity suitability was evaluated according to the following criteria.
  • ⁇ 2mPa ⁇ s or more, less than 8mPa ⁇ s
  • the present invention uses a plate-forming ink containing the polymer compound according to the present invention and the fine particles of the resin in the amounts specified in the present invention.
  • the plate-making method of the invention is superior to the comparative examples in all of water rub resistance, fleshing property, printing durability and dot gain. Click is provided with a proper viscosity characteristics, Rukoto be seen c

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Ink Jet (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Plates And Materials Therefor (AREA)

Abstract

La présente invention concerne un procédé de fabrication de plaque dans lequel, tout en utilisant les caractéristiques de commodité et de forte productivité obtenues par un procédé de jet d'encre, la durée de vie de la plaque est améliorée, ce qui résout le problème des propriétés d'alimentation et d'encrage de la fabrication de plaque du procédé de jet d'encre ; dans cette réalisation d'une sensibilité de durcissement élevée, la fabrication de plaque peut être accomplie avec un simple appareil en utilisant une encre de jet d'encre à faible viscosité. L'invention concerne également un procédé de fabrication de plaque par la procédure séquentielle d'application d'une encre de création de plaque sur un matériau de plaque d'impression en fonction d'une technique d'impression à jet d'encre, en irradiant l'encre avec des rayons d'énergie actinique, en évaporant le solvant d'encre et en séchant pour ainsi obtenir une formation d'image et donc une plaque d'impression, caractérisée en ce que l'encre de fabrication de plaque contient au moins de l'eau, un composé de réticule de rayon d'énergie actinique capable de durcir avec une irradiation par rayons d'énergie actinique s'élevant de 0,8 à 30 % en masse en fonction de la masse totale de l'encre et des micro-particules de résine ayant un diamètre de particule moyen de 5 à 150 nm, se montant à 0,1 à 7 % en masse.
PCT/JP2007/062889 2006-07-20 2007-06-27 Procédé de fabrication de plaque et plaque d'impression WO2008010393A1 (fr)

Priority Applications (1)

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JP2008525818A JPWO2008010393A1 (ja) 2006-07-20 2007-06-27 製版方法及び印刷版

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JP2006197822 2006-07-20
JP2006-197822 2006-07-20

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011136272A (ja) * 2009-12-28 2011-07-14 Seiko Epson Corp 記録方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5662157A (en) * 1979-10-25 1981-05-27 Minolta Camera Co Ltd Manufacture of master paper for offset
JPS63102936A (ja) * 1986-10-21 1988-05-07 Canon Inc 製版方法
JPH0469244A (ja) * 1990-07-11 1992-03-04 Konica Corp 印刷版の形成方法
JP2006117795A (ja) * 2004-10-21 2006-05-11 Fuji Photo Film Co Ltd 放射線硬化型インクジェット用インク組成物及びこれを用いた平版印刷版
JP2006182990A (ja) * 2004-12-28 2006-07-13 Fuji Photo Film Co Ltd インクジェット記録用インク組成物およびこれを用いた平版印刷版の作製方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5662157A (en) * 1979-10-25 1981-05-27 Minolta Camera Co Ltd Manufacture of master paper for offset
JPS63102936A (ja) * 1986-10-21 1988-05-07 Canon Inc 製版方法
JPH0469244A (ja) * 1990-07-11 1992-03-04 Konica Corp 印刷版の形成方法
JP2006117795A (ja) * 2004-10-21 2006-05-11 Fuji Photo Film Co Ltd 放射線硬化型インクジェット用インク組成物及びこれを用いた平版印刷版
JP2006182990A (ja) * 2004-12-28 2006-07-13 Fuji Photo Film Co Ltd インクジェット記録用インク組成物およびこれを用いた平版印刷版の作製方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011136272A (ja) * 2009-12-28 2011-07-14 Seiko Epson Corp 記録方法

Also Published As

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