WO2012111238A1 - 印刷版用現像液組成物、現像液および印刷原版の製造方法 - Google Patents
印刷版用現像液組成物、現像液および印刷原版の製造方法 Download PDFInfo
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- WO2012111238A1 WO2012111238A1 PCT/JP2011/080006 JP2011080006W WO2012111238A1 WO 2012111238 A1 WO2012111238 A1 WO 2012111238A1 JP 2011080006 W JP2011080006 W JP 2011080006W WO 2012111238 A1 WO2012111238 A1 WO 2012111238A1
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- printing plate
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- developing solution
- alkali metal
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/30—Imagewise removal using liquid means
- G03F7/32—Liquid compositions therefor, e.g. developers
- G03F7/322—Aqueous alkaline compositions
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/30—Imagewise removal using liquid means
- G03F7/32—Liquid compositions therefor, e.g. developers
Definitions
- the present invention relates to a developing solution for a printing plate used during plate making of a photosensitive resin printing plate, and particularly an aqueous development suitable for developing a CTP printing plate containing carbon black in an infrared-sensitive layer or developing a negative flexographic printing plate. Regarding liquids.
- the photosensitive resin composition is generally used as a printing plate, and has become mainstream in each field of resin relief printing, planographic printing, intaglio printing, and flexographic printing.
- the photosensitive resin composition those developed with an aqueous solution are strongly demanded from the viewpoint of influence on the environment and workability.
- a flexographic photosensitive resin composition that can be developed with water, a composition comprising a synthetic rubber and a hydrophilic polymer is commercially available.
- water-development plates with higher resolution have been developed by using latex that is present in the form of fine particles as the main component.
- a method for the production of these printing plates, a method (negative method) in which an original image film is vacuum-contacted with a photosensitive resin printing plate and irradiated with actinic rays through the original image film is widely used.
- the cross-linking reaction selectively proceeds at an exposed portion irradiated with actinic rays, and an image portion is formed.
- the uncrosslinked resin composition in the non-exposed area is washed away with an aqueous developer to obtain an uneven relief.
- water having a pH of 5.0 to 9.0 including general water for daily use or water containing an alkaline compound such as sodium hydroxide or sodium carbonate, a surfactant, a water-soluble organic solvent or the like is appropriate.
- an alkaline compound such as sodium hydroxide or sodium carbonate
- a surfactant e.g., alkyl naphthalene sulfonic acid soda, alkyl benzene sulfonic acid soda and the like can be used.
- an aqueous developer obtained by blending water with an anionic surfactant, and optionally a pH adjuster, a cleaning accelerator and the like.
- an average carbon number of 8 is used.
- the conventionally known aqueous developers are effective against the adverse effects caused by the uncrosslinked resin composition (scum), the effect is insufficient for the image mask layer developed and removed together with the uncrosslinked resin composition.
- the image mask layer used in the CTP method contains a lot of water-insoluble pigments such as carbon black having infrared absorbing ability. Therefore, the image mask layer washed and removed in the development process has poor water solubility and water dispersibility, and small pieces of the image mask layer adhere to the brush to reduce developability, or reattach to the printing plate surface and the plate surface. There was a problem such as degrading the quality of.
- a conventionally known aqueous developer is effective at an early stage of development in which the scum weight ratio dissolved or dispersed in the developer is a low concentration with respect to the developer, but a large amount is developed and the scum concentration is low.
- the amount is increased to about 10 parts by weight or more, problems such as scum adhering to the brush and developing performance are lowered, or re-adhering to the printing plate surface and plate quality are deteriorated. Therefore, it has been necessary to discard the developer having an increased scum concentration and restart the plate making using a new developer.
- the present invention has been made in view of the current state of the prior art, and its purpose is to disperse an image mask layer (infrared sensitive layer) in a developer during the development process of a water-developable printing plate suitable for the CTP technique.
- the present inventors have identified (a) an alkali metal salt of a saturated fatty acid having 12 to 18 carbon atoms and (b) an alkali metal salt of an unsaturated fatty acid having 12 to 18 carbon atoms.
- the inventors have found that the above-described aqueous developer for a printing plate can be obtained by using the developer composition for a printing plate contained at a weight ratio of 1% to complete the present invention.
- the present invention has the following configurations (1) to (11).
- (2) The developer composition according to (1), wherein the alkali metal salt of the component (a) and / or the component (b) is a sodium salt and / or a potassium salt.
- (3) The developer composition according to (1) or (2), wherein the unsaturated fatty acid of component (b) is a monounsaturated fatty acid and / or a diunsaturated fatty acid.
- a method for producing a printing original plate comprising a step of developing with a developer.
- (8) The method for producing a printing original plate as described in (7), wherein the (D) infrared-sensitive layer contains carbon black.
- An aqueous developer for a printing plate comprising 0.01 to 10% by weight of the developer composition according to (9) or (10) and water.
- a method for producing a printing original plate
- the developer composition of the present invention and the developer prepared using the developer composition have good dispersibility of the image mask layer with respect to the developer, so that small pieces of the image mask layer adhere to the brush and reduce developability. Are less likely to cause problems such as adhering to the brush and reducing developability, and reattaching to the printing plate surface to deteriorate the quality of the plate surface. Further, when such a developer is used, it is not necessary to frequently change the developer, which is advantageous from the viewpoint of environmental load and manufacturing cost.
- the developer composition for a printing plate of the present invention comprises (a) an alkali metal salt of a saturated fatty acid having 12 to 18 carbon atoms and (b) an alkali metal salt of an unsaturated fatty acid having 12 to 18 carbon atoms.
- : (B) 20: 80 to 80:20 in a weight ratio.
- the weight ratio of (a) :( b) is preferably 25:75 to 75:25, more preferably 30:70 to 70:30, and further preferably 30:70 to 50:50. preferable.
- the component (a) used in the composition of the present invention is an alkali metal salt of a saturated fatty acid having 12 to 18 carbon atoms, and is preferably a sodium salt and / or a potassium salt.
- Specific examples include sodium laurate, sodium myristate, sodium palmitate, sodium stearate, potassium laurate, potassium myristate, potassium palmitate, and potassium stearate. These may be used alone or as a mixture, but potassium laurate alone is preferred.
- potassium laurate is used as the component (a)
- the dispersibility of the image mask layer in the developer is particularly excellent.
- the component (b) used in the composition of the present invention is an alkali metal salt of an unsaturated fatty acid having 12 to 18 carbon atoms, and is preferably a sodium salt and / or a potassium salt. Further, monounsaturated fatty acids and / or diunsaturated fatty acids are more preferable. Specifically, sodium palmitoleate, sodium oleate, sodium linoleate, sodium linolenate, sodium ricinoleate, sodium arachidonate, potassium palmitoleate, potassium oleate, potassium linoleate, potassium linolenate, potassium ricinoleate, arachidon Examples include potassium acid. These may be used alone or as a mixture, but sodium oleate is preferably used alone. When sodium oleate is used as the component (b), the image mask layer dispersibility in the developer is particularly excellent.
- composition ratio of the component (a) and the component (b) in the composition of the present invention can be quantified by gas chromatography mass spectrometry.
- composition of the present invention may further contain (c) an alkali agent, and (c) the alkali agent is 0.01 to 10 parts by weight relative to 100 parts by weight of the total of components (a) and (b). It is preferable that
- a conventionally known alkali agent can be used, but an alkali metal carbonate and / or an alkali metal hydroxide is preferable, and the alkali metal is sodium and / or potassium. It is preferable that Specific examples include sodium carbonate, potassium carbonate, sodium hydroxide, and potassium hydroxide. Among these, sodium carbonate is preferable from the viewpoint of safety.
- Some commercially available soaps may contain components (a), (b) and (c) in the same weight ratio of the composition of the present invention.
- commercially available soap has a complicated composition including various auxiliary agents in addition to the components (a) and (b) which are surfactants and the component (c) which is an alkaline agent.
- Specific examples of the auxiliary agent include metal sequestering agents, enzymes, preservatives, fluorescent brighteners, and fragrances, and are added for the purpose of accelerating cleaning, finishing, and improving the texture of dirt attached to clothing.
- Some of these auxiliaries inhibit the effects of the present invention, and in particular, enzymes, fluorescent brighteners, and fragrances deteriorate the developability or adhere to the plate surface and impair the printability. There is a risk of inhibiting the effect.
- commercially available soaps may vary in composition even with the same brand, and the effects of the present invention may not be exhibited.
- Component (a) includes, for example, a method of neutralizing a saturated fatty acid having 12 to 18 carbon atoms with an alkaline agent such as sodium hydroxide or potassium hydroxide (fatty acid neutralization method), a saturated fatty acid ester having 12 to 18 carbon atoms, A method of saponifying with an alkali agent such as sodium hydroxide or potassium hydroxide (fatty acid ester saponification method), or a natural fat or oil containing a saturated fatty acid having 12 to 18 carbon atoms with an alkali agent such as sodium hydroxide or potassium hydroxide. It can be produced by a method (oil saponification method).
- Component (b) is, for example, a method of neutralizing an unsaturated fatty acid having 12 to 18 carbon atoms with an alkali agent such as sodium hydroxide or potassium hydroxide (fatty acid neutralization method), or an unsaturated fatty acid having 12 to 18 carbon atoms.
- an alkali agent such as sodium hydroxide or potassium hydroxide
- a method of saponifying a fatty acid ester with an alkali agent such as sodium hydroxide or potassium hydroxide fatty acid ester saponification method
- fatty acid ester saponification method a natural fat or oil containing an unsaturated fatty acid having 12 to 18 carbon atoms with an alkali such as sodium hydroxide or potassium hydroxide.
- fatty acid saponification method a method of saponifying with an agent (oil saponification method).
- the developer composition of the present invention can be dissolved in water and used as an aqueous developer for a printing plate, and the content of the developer composition is 0.01 to 10% by weight with respect to the total amount of the developer, preferably It is desirable that the content be 0.1 to 5% by weight, more preferably 0.5 to 3% by weight.
- the content of the developer composition exceeds 10% by weight, the image mask layer dispersibility is inferior, and when it is less than 0.01% by weight, the removal ability of the uncrosslinked resin composition tends to be inferior.
- the water used for the preparation of the aqueous developer of the present invention can be tap water or pure water obtained by an ion exchange method, a distillation method, a reverse osmosis membrane method, a composite thereof, or the like.
- the aqueous developer of the present invention can be prepared by a method of stirring and homogenizing each component of the developer composition of the present invention, and the blending order of each component is not particularly limited.
- the aqueous developer of the present invention is a weak alkaline aqueous solution that is stable in a wide range of temperatures from 0 to 50 ° C., and is safer than a strong alkaline developer.
- various additives can be blended as optional components as required.
- sequestering agents such as citric acid and EDTA, alkanolamines such as ethanolamine, pH adjusters such as sodium carbonate, sodium hydroxide and potassium hydroxide, preservatives such as benzotriazole and benzoic acid, glycols such as ethylene glycol And freezing point depressants such as lower alcohols such as ethanol, and antifoaming agents such as silicones and polyols can be appropriately blended within a range not impairing the effects of the present invention.
- the aqueous developer thus constituted is excellent in stability over time, and is particularly suitable as a developer for a flexographic printing plate suitable for CTP plate making or negative plate making technology.
- the developer is brought into contact with an unexposed portion, and a physical action such as brush, water pressure, or ultrasonic waves is applied to the uncrosslinked portion of the photosensitive resin layer and the image.
- a physical action such as brush, water pressure, or ultrasonic waves
- Examples include a method of dissolving or dispersing the mask layer in a developer and developing the mask layer.
- the developing solution may be immersed in the unexposed portion, or may be continuously supplied and brought into contact when a physical action is exerted.
- this developer is preferably heated. Generally, the temperature is 20 to 60 ° C, and preferably 30 to 50 ° C.
- a physical action force that is usually used, a brush is used, and the material, thickness, length, bristle density, arrangement, movement, rotation direction, and the like of the hair are appropriately selected.
- the aqueous developer of the present invention can be used for general development of a photosensitive printing original plate that can be developed with water, but for development of a CTP printing plate containing carbon black in an infrared-sensitive layer and development of a negative flexographic printing plate. Particularly preferred. This is because the dispersibility of the infrared-sensitive layer containing carbon black and the scum dispersibility in the aqueous developer are particularly excellent.
- the water-developable flexographic printing plate generally has a structure in which at least (A) a support, (B) a photosensitive resin layer, (C) a protective layer, and (D) an infrared-sensitive layer are sequentially laminated in the CTP method,
- the system has a structure in which at least (A) a support, (B) a photosensitive resin layer, and (E) an anti-adhesion layer are sequentially laminated.
- the support is preferably a material that is flexible but excellent in dimensional stability.
- a metal support such as steel, aluminum, copper, or nickel, a polyethylene terephthalate film, a polyethylene naphthalate film, a poly Mention may be made of a thermoplastic resin support such as a butylene terephthalate film or a polycarbonate film.
- a polyethylene terephthalate film having excellent dimensional stability and sufficiently high viscoelasticity is particularly preferable.
- the thickness of the support is preferably from 50 to 350 ⁇ m, and preferably from 100 to 250 ⁇ m, from the standpoint of mechanical properties, shape stabilization, or handleability during plate making.
- the photosensitive resin layer comprises a synthetic polymer compound, a photopolymerizable unsaturated compound, and an essential component of a photopolymerization initiator, a plasticizer, a thermal polymerization inhibitor, a dye, a pigment, an ultraviolet absorber, a fragrance, or It is comprised from arbitrary additives, such as antioxidant.
- the photosensitive resin layer (B) must be developable with an aqueous developer.
- the synthetic polymer compound that can be developed with water latex is preferably used.
- the water-developable photosensitive resin layer is generally flexible, but the use of latex inevitably makes the printing plate very flexible. When latex is not used, for example, those described in JP-A-3-198058 can be used.
- Usable latexes include polybutadiene latex, natural rubber latex, styrene-butadiene copolymer latex, acrylonitrile-butadiene copolymer latex, polychloroprene latex, polyisoprene latex, polyurethane latex, methyl methacrylate-butadiene copolymer latex, Water-dispersed latex polymers such as vinylpyridine polymer latex, butyl polymer latex, thiocol polymer latex, and acrylate polymer latex, and heavy polymers obtained by copolymerizing these polymers with other components such as acrylic acid and methacrylic acid. Coalescence is mentioned.
- an aqueous dispersion latex polymer containing a butadiene skeleton or an isoprene skeleton in the molecular chain is preferably used from the viewpoint of hardness and rubber elasticity.
- polybutadiene latex, styrene-butadiene copolymer latex, acrylonitrile-butadiene copolymer latex, methyl methacrylate-butadiene copolymer latex, and polyisoprene latex are preferable. Latex needs to be confirmed as independent fine particles.
- the protective layer is provided to prevent polymerization inhibition due to oxygen of the photosensitive resin layer.
- the protective layer is not particularly limited as long as it can be removed with an aqueous developer, and can be constituted using any polymer soluble or insoluble in water. Even a water-insoluble polymer can be removed and developed by physically rubbing with a brush, but a water-soluble polymer is preferred for shortening the development time.
- Examples of such a polymer constituting the protective layer include soluble polyamide, polyvinyl alcohol, polyacrylic acid, polyethylene oxide, alkyl cellulose, cellulosic polymers (particularly hydroxypropyl cellulose, hydroxyethyl cellulose, nitrocellulose), and cellulose acetate.
- the protective layer preferably has a higher thermal decomposition temperature than the infrared-sensitive layer. This is because if the thermal decomposition temperature of the protective layer is lower than that of the infrared-sensitive layer, the protective layer may be thermally decomposed during ablation of the infrared-sensitive layer.
- the infrared-sensitive layer is composed of a binder, a material having a function of absorbing an infrared laser and converting it into heat, and a function of blocking ultraviolet light. Further, as an optional component other than these, a pigment dispersant, a filler, a surfactant, a coating aid, or the like can be contained within a range that does not impair the effects of the present invention.
- the infrared-sensitive layer preferably has an optical density of 2.0 or more with respect to actinic radiation, more preferably an optical density of 2.0 to 3.0, and particularly preferably 2.2 to 2.
- the optical density is 5.
- the layer thickness of the (D) infrared-sensitive layer is preferably 0.5 to 5.0 ⁇ m, more preferably 1.0 to 2.0 ⁇ m. If it is more than the said minimum, a high coating technique is not required but an optical density more than fixed can be obtained. Moreover, if it is below the said upper limit, high energy is not required for evaporation of an infrared-sensitive layer, and it is advantageous in cost.
- the binder is not particularly limited, but a polar copolyamide is preferably used.
- the polyamide used may be appropriately selected from conventionally known cationic polyamides, nonionic polyamides, and anionic polyamides, such as tertiary amine group-containing polyamides, quaternary ammonium base-containing polyamides, ether group-containing polyamides, and sulfonic acids. Examples thereof include group-containing polyamide.
- Examples of the material having the infrared absorption function and the ultraviolet light blocking function include dyes such as phthalocyanine, substituted phthalocyanine derivatives, cyanine, merocyanine dyes, and polymethine dyes, and pigments such as carbon black, graphite, chromium oxide, and iron oxide. .
- dyes such as phthalocyanine, substituted phthalocyanine derivatives, cyanine, merocyanine dyes, and polymethine dyes
- pigments such as carbon black, graphite, chromium oxide, and iron oxide. .
- carbon black is particularly preferable from the viewpoints of photothermal conversion, economic efficiency, and handleability.
- the material having the infrared absorption function and the ultraviolet light blocking function is appropriately used at a concentration that can achieve the optical density and the layer thickness. Generally, 1 to 60% by weight based on the total weight of the (D) infrared-sensitive layer. %, Preferably 10 to 50% by weight. If it is less than the lower limit, the optical density becomes less than 2.0, and there is a possibility that the infrared absorption function and the ultraviolet light blocking function are not exhibited. On the other hand, when the above upper limit is exceeded, other components such as a binder are insufficient, and the film-forming property may be lowered.
- peelable flexible cover film On the infrared-sensitive layer to protect the printing original plate.
- Suitable examples of the peelable flexible cover film include a polyethylene terephthalate film, a polyethylene naphthalate film, and a polybutylene terephthalate film.
- the anti-adhesion layer is provided to prevent adhesion between the photosensitive resin layer and the original image film when the original image film is vacuum-adhered to the photosensitive resin printing plate and irradiated with actinic rays through the original image film.
- the anti-adhesion layer can be constructed using any polymer that is soluble or insoluble in water. Even a water-insoluble polymer can be removed and developed by physically rubbing with a brush, but a water-soluble polymer is preferred for shortening the development time.
- Examples of such a polymer constituting the anti-adhesion layer include soluble polyamide, polyvinyl alcohol, polyacrylic acid, polyethylene oxide, alkyl cellulose, cellulose polymers (particularly hydroxypropyl cellulose, hydroxyethyl cellulose, nitrocellulose), and cellulose.
- Examples include acetate butyrate, polybutyral, butyl rubber, NBR rubber, acrylic rubber, styrene-butadiene rubber, latex, and soluble polyester. These polymers are not limited to one type of use, and two or more types of polymers can be used in combination.
- various additives can be blended as optional components as required.
- peelable flexible cover film it is preferable to provide a peelable flexible cover film on the anti-adhesion layer to protect the printing original plate.
- Suitable examples of the peelable flexible cover film include a polyethylene terephthalate film, a polyethylene naphthalate film, and a polybutylene terephthalate film.
- the method for producing the printing original plate of the present invention is produced, for example, as follows in the CTP method.
- a solution is prepared by dissolving all components of the infrared-sensitive layer in an appropriate solvent, or when using a pigment such as carbon black, all components other than the pigment are dissolved in an appropriate solvent, and the pigment is then added to the solution.
- Disperse to prepare a dispersion.
- a solution or dispersion is applied onto a support for an infrared-sensitive layer (eg, a PET film), and the solvent is evaporated.
- the protective layer component is overcoated to produce one laminate.
- a photosensitive resin layer is formed on the support by coating, and the other laminate is prepared. The two laminates thus obtained are laminated so that the photosensitive resin layer is adjacent to the protective layer under pressure and / or heating.
- the infrared sensitive layer support functions as a protective film on the surface of the printing original plate after completion.
- the protective film is removed from the photosensitive printing plate. Thereafter, the infrared-sensitive layer is irradiated imagewise with an IR laser to form an image mask on the photosensitive resin layer.
- suitable IR lasers include ND / YAG laser (1064 nm) or diode laser (eg, 830 nm).
- a laser system suitable for computer plate making technology is commercially available, and for example, a diode laser system CDI Spark (Esco Artwork) can be used. This laser system includes a rotating cylindrical drum that holds a printing original, an IR laser irradiation device, and a layout computer, and image information is directly transferred from the layout computer to the laser device.
- the photosensitive printing original plate is irradiated with actinic rays through the image mask.
- actinic rays having a wavelength of 150 to 500 nm, particularly 300 to 400 nm can be used.
- a low-pressure mercury lamp, a high-pressure mercury lamp, an ultrahigh-pressure mercury lamp, a metal halide lamp, a xenon lamp, a zirconium lamp, a carbon arc lamp, an ultraviolet fluorescent lamp, or the like can be used. Thereafter, the irradiated plate is developed using the developer of the present invention to obtain a printing plate.
- the printing original plate of the present invention is manufactured, for example, as follows in the negative method.
- the anti-adhesion layer component is dissolved in a suitable solvent.
- This solution is applied onto a support (eg, a PET film), and the solvent is evaporated to produce one laminate.
- a photosensitive resin layer is formed on the support by coating, and the other laminate is prepared.
- the two laminates thus obtained are laminated so that the photosensitive resin layer is adjacent to the anti-adhesion layer under pressure and / or heating.
- the support functions as a protective film on the surface of the printing original plate after completion.
- the protective film is removed from the photosensitive printing plate.
- a negative film having an image is placed on the printing plate, and in close contact with vacuum, the entire surface is irradiated with actinic rays.
- actinic ray ultraviolet rays having a wavelength of 150 to 500 nm, particularly 300 to 400 nm can be used.
- the light source a low-pressure mercury lamp, a high-pressure mercury lamp, an ultrahigh-pressure mercury lamp, a metal halide lamp, a xenon lamp, a zirconium lamp, a carbon arc lamp, an ultraviolet fluorescent lamp, or the like can be used.
- the irradiated plate is developed using the developer of the present invention to obtain a printing plate.
- Examples 1A to 14A, Comparative Examples 1A to 8A A CTP-type flexographic printing original plate was prepared by the following methods (1) to (5). Using the obtained flexographic printing original plate, a printing plate was produced by the method (6) below. Further, the dispersibility of the image mask was evaluated by the following method (7). Tables 1 and 2 show the developer compositions and evaluation results of Examples 1A to 14A and Comparative Examples 1A to 8A.
- photosensitive resin composition X 10 parts by weight of acrylonitrile-butadiene latex (Nipol SX1503 non-volatile content 42% made by Nippon Zeon Co., Ltd.), butadiene latex (Nipol LX111NF non-volatile content 55% made by Nippon Zeon Co., Ltd.) 58 Parts by weight, 28 parts by weight of oligobutadiene acrylate (ABU-2S manufactured by Kyoeisha Chemical Co., Ltd.), 4 parts by weight of lauryl methacrylate (manufactured by Kyoeisha Chemical Co., Ltd.), 4 parts by weight of dimethylol tricyclodecane diacrylate, light 1 part by weight of a polymerization initiator, 0.1 part by weight of hydroquinone monomethyl ether as a polymerization inhibitor and 0.1 part by weight of a nonionic surfactant as another additive are mixed together with 15 parts by weight of toluene in a container,
- flexographic printing original plate having photosensitive resin layer X The above photosensitive resin composition X is placed on a 100 ⁇ m PET film coated with a copolyester adhesive, and a laminated film Y is stacked thereon. Combined. Lamination was performed at 100 ° C. using a heat press to obtain a flexographic printing original plate comprising a PET support, an adhesive layer, a photosensitive resin layer, a protective layer, an infrared-sensitive layer, and a release-treated PET protective film (cover film).
- Small particles having a size of less than 1 mm were evaluated as ⁇ , those having a size of 1 mm or more and less than 3 mm, ⁇ having a size of 3 mm or more and less than 5 mm, and medium size ⁇ , and those having a size of 5 mm or more as large particles ⁇ .
- Examples 1B to 12B, Comparative Examples 1B to 4B Cosmolite NS170F (manufactured by Toyobo Co., Ltd.) was used as a negative flexographic printing original plate. Developers were prepared by the following method (1), and developability (pH, scum dispersibility) was evaluated by the following method (2). Tables 3 and 4 show the developer compositions and evaluation results of Examples 1B to 12B and Comparative Examples 1B to 4B.
- the developer composition of the present invention and the developer prepared using the developer composition can be suitably used for developing a printing plate.
- the development or negative of a CTP printing original plate having an infrared-sensitive layer containing carbon black is useful for developing a flexographic printing plate precursor.
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Abstract
Description
(1)(a)炭素数12~18の飽和脂肪酸のアルカリ金属塩と(b)炭素数12~18の不飽和脂肪酸のアルカリ金属塩とを、(a):(b)=20:80~80:20の重量比で含有する印刷版用現像液組成物。
(2)前記(a)成分および/または前記(b)成分のアルカリ金属塩が、ナトリウム塩および/またはカリウム塩である(1)に記載の現像液組成物。
(3)前記(b)成分の不飽和脂肪酸がモノ不飽和脂肪酸および/またはジ不飽和脂肪酸である(1)または(2)に記載の現像液組成物。
(4)前記(a)成分がラウリン酸ナトリウムおよび/またはラウリン酸カリウムである(1)~(3)のいずれかに記載の現像液組成物。
(5)前記(b)成分がオレイン酸ナトリウムおよび/またはオレイン酸カリウムである(1)~(4)のいずれかに記載の現像液組成物。
(6)(1)~(5)のいずれかに記載の現像液組成物0.01~10重量%および水を含有する印刷版用水性現像液。
(7)少なくとも(A)支持体、(B)感光性樹脂層、(C)保護層、および(D)感赤外線層が順次積層された構成を有するフレキソ印刷版を(6)に記載の水性現像液で現像する工程を有する印刷原版の製造方法。
(8)前記(D)感赤外線層がカーボンブラックを含有する(7)に記載の印刷原版の製造方法。
(9)(c)アルカリ剤をさらに含有し、(a)と(b)の合計100重量部に対して(c)が0.01~10重量部である(1)~(5)のいずれかに記載の現像液組成物。
(10)前記(c)成分がアルカリ金属炭酸塩および/またはアルカリ金属水酸化物であり、アルカリ金属がナトリウムおよび/またはカリウムである(9)に記載の現像液組成物。
(11)(9)または(10)に記載の現像液組成物0.01~10重量%および水を含有する印刷版用水性現像液。
(12)少なくとも(A)支持体、(B)感光性樹脂層、および(E)粘着防止層が順次積層された構成を有するフレキソ印刷版を(11)に記載の現像液で現像する工程を有する印刷原版の製造方法。
まず、感赤外線層の全成分を適当な溶媒に溶解させて溶液を作製するか、或いはカーボンブラック等の顔料を用いるときは、顔料以外の全成分を適当な溶媒に溶解させ、そこに顔料を分散させて分散液を作製する。次に、このような溶液又は分散液を感赤外線層用支持体(例、PETフィルム)上に塗布して、溶剤を蒸発させる。その後、保護層成分を上塗りし、一方の積層体を作成する。さらに、これとは別に支持体上に塗工により感光性樹脂層を形成し、他方の積層体を作成する。このようにして得られた二つの積層体を、圧力及び/又は加熱下に、感光性樹脂層が保護層に隣接するように積層する。なお、感赤外線層用支持体は、印刷原版の完成後はその表面の保護フィルムとして機能する。
まず、粘着防止層成分を適当な溶媒に溶解させる。この溶液を支持体(例、PETフィルム)上に塗布して溶剤を蒸発させ、一方の積層体を作成する。さらに、これとは別に支持体上に塗工により感光性樹脂層を形成し、他方の積層体を作成する。このようにして得られた二つの積層体を、圧力及び/又は加熱下に、感光性樹脂層が粘着防止層に隣接するように積層する。なお、支持体は、印刷原版の完成後はその表面の保護フィルムとして機能する。
下記(1)~(5)の方法により、CTP方式のフレキソ印刷原版を作製した。得られたフレキソ印刷原版を用いて、下記(6)の方法で印刷版を作製した。また、下記(7)の方法により画像マスクの分散性を評価した。実施例1A~14A、比較例1A~8Aの現像液組成物と評価結果を表1および表2に示す。
アクリロニトリル-ブタジエンラテックス(Nipol SX1503 不揮発分42% 日本ゼオン(株)製)10重量部、ブタジエンラテックス(Nipol LX111NF 不揮発分55% 日本ゼオン(株)製)58重量部、オリゴブタジエンアクリレート(ABU-2S 共栄社化学(株)製)28重量部、ラウリルメタクリレート(ライトエステルL 共栄社化学(株)製)4重量部、ジメチロールトリシクロデカンジアクリレート4重量部、光重合開始剤1重量部、重合禁止剤としてハイドロキノンモノメチルエーテル0.1重量部、その他の添加剤としてノニオン系界面活性剤0.1重量部をトルエン15重量部とともに容器中で混合し、次に加圧ニーダーを用いて105℃で混練し、その後トルエンと水を減圧除去することにより、感光性樹脂組成物Xを得た。
低ケン化度ポリビニルアルコール(PVA405 (株)クラレ製)と可塑剤(サンフレックスSE270 三洋化成工業製 脂肪族多価アルコール系ポリエーテルポリオール 固形分濃度85%)とNBRラテックス(SX1503A 日本ゼオン(株)製 固形分濃度42%)を、固形分重量比で35/35/30になるよう、水・イソプロピルアルコール混合液に溶解し、保護層塗工液を調製した。
カーボンブラック分散液(AMBK-8 オリエント化学工業(株)製)と共重合ポリアミド(PA223 東洋紡績(株)製)を固形分重量比で63/37になるよう、メタノール・エタノール・イソプロピルアルコール混合液に溶解し、感赤外線層塗工液を調製した。
両面に離形処理を施した100μmのPETフィルム上に感赤外線層塗工液を適切な種類のバーコーターを用いて塗工し、120℃で5分間乾燥し、PETフィルム上に膜厚1.5μmの感赤外線層を積層した。この時の光学濃度は2.3であった。この光学濃度は白黒透過濃度計DM-520(大日本スクリーン製造(株))によって測定した。
次いで、上記感赤外線層の上に保護層塗工液を適切な種類のバーコーターを用いて塗工し、120℃で5分間乾燥し、PETフィルム上に膜厚1.5μmの感赤外線層と膜厚0.5μmの保護層がこの順に積層されている積層フィルムYを得た。
共重合ポリエステル系接着剤を塗工した100μmのPETフィルム上に上記感光性樹脂組成物Xを配置し、その上から積層フィルムYを重ね合わせた。ヒートプレス機を用いて100℃でラミネートし、PET支持体、接着層、感光性樹脂層、保護層、感赤外線層および離型処理PET保護フィルム(カバーフィルム)からなるフレキソ印刷原版を得た。
原版のPET支持体側から化学線(光源Philips10R、365nmにおける照度8mW/cm2)を1分照射した。続いて、離型処理PETフィルム(カバーフィルム)を剥離した。この版を、CDI Spark2530(エスコアートワーク社製)の回転ドラムに感赤外線層が表側にくるように巻き付け、真空引き後、画像形成を行った。アブレーション後、版を取り出して平面に戻し、化学線(光源Philips10R、365nmにおける照度8mW/cm2)を6分照射した。
露光後、下記表1に示される各実施例1A~7A、比較例1A~4Aの現像液組成物、下記表2に示される各実施例8A~14A、比較例5A~8Aの現像液組成物をそれぞれ水道水で1重量%に希釈して現像液を調整し、A&V(株)製現像機(Stuck System)を用いて、40℃で8分現像した。現像後、60℃で10分乾燥し、化学線を10分間照射し、最後に表面粘着性を除去するために殺菌灯を5分間照射した。
どの水性現像液を使用した場合でも、問題なく良好な印刷版を作製することができた。スカム付着による印刷版表面の品位悪化は見られなかった。
下記表1に示される各実施例1A~7A、比較例1A~4Aの現像液組成物、下記表2に示される各実施例8A~14A、比較例5A~8Aの現像液組成物をそれぞれ水道水で1重量%に希釈して現像液を100ml調整した。各現像液中で、7cm×7cmの原版25枚を、それぞれ1枚ずつ、振動を加えながら30秒間浸漬させ、画像マスク層を原版から脱落させた。目視により、分散した画像マスク層のサイズを評価した。小片10個の大きさを定規で測定し、平均値を算出した。小片サイズが1mm未満のものを◎◎、1mm以上3mm未満のものを◎、3mm以上5mm未満のものを中粒○、5mm以上のものを大粒×とした。
ネガ方式のフレキソ印刷原版としてコスモライトNS170F(東洋紡績株式会社製)を使用した。下記(1)の方法により現像液を調製し、下記(2)の方法により現像性(pH、スカム分散性)を評価した。実施例1B~12B、比較例1B~4Bの現像液組成物と評価結果を表3および表4に示す。
下記表3及び4に示される各実施例1B~12B、比較例1B~4Bの現像液組成物をそれぞれ水道水で1重量%に希釈して現像液を調整した。A&V(株)製現像機(Stuck System)に現像液を45kg注ぎ、40℃に昇温した。
381mm×305mm(0.116m2)の原版を支持体側から化学線(光源Philips10R、365nmにおける照度8mW/cm2)を15秒照射した。続いて、保護フィルムを剥離し、15分現像した。非画像100%、深度700μmの印刷版が得られた。現像により洗い出された樹脂の量は、原版1枚あたり0.08kgであった。原版28枚を現像するごとに、現像液をビーカーに100mLサンプリングし、ハンディ型pH計(株式会社佐藤計量器製作所製SK-620PH)を用いてpHを測定した。続いて、ブラシを持ち上げてスカム詰りの程度を目視にて確認した。ブラシにスカム詰りがないものを○、スカム詰りがあるものを×とした。ブラシ詰りがない時は、問題なく良好な印刷版を作製することができた。スカム付着による印刷版表面の品位悪化は見られなかった。一方、ブラシ詰りがある時は、スカム付着による印刷版表面の品位悪化が見られた。ブラシ詰りが見られたところを、現像液の使用限界と見なし、実験終了とした。
Claims (12)
- (a)炭素数12~18の飽和脂肪酸のアルカリ金属塩と(b)炭素数12~18の不飽和脂肪酸のアルカリ金属塩とを、(a):(b)=20:80~80:20の重量比で含有する印刷版用現像液組成物。
- 前記(a)成分および/または前記(b)成分のアルカリ金属塩が、ナトリウム塩および/またはカリウム塩である請求項1に記載の現像液組成物。
- 前記(b)成分の不飽和脂肪酸がモノ不飽和脂肪酸および/またはジ不飽和脂肪酸である請求項1または2に記載の現像液組成物。
- 前記(a)成分がラウリン酸ナトリウムおよび/またはラウリン酸カリウムである請求項1~3のいずれかに記載の現像液組成物。
- 前記(b)成分がオレイン酸ナトリウムおよび/またはオレイン酸カリウムである請求項1~4のいずれかに記載の現像液組成物。
- 請求項1~5のいずれかに記載の現像液組成物0.01~10重量%および水を含有する印刷版用水性現像液。
- 少なくとも(A)支持体、(B)感光性樹脂層、(C)保護層、および(D)感赤外線層が順次積層された構成を有するフレキソ印刷版を請求項6に記載の水性現像液で現像する工程を有する印刷原版の製造方法。
- 前記(D)感赤外線層がカーボンブラックを含有する請求項7に記載の印刷原版の製造方法。
- (c)アルカリ剤をさらに含有し、(a)と(b)の合計100重量部に対して(c)が0.01~10重量部である請求項1~5のいずれかに記載の現像液組成物。
- 前記(c)成分がアルカリ金属炭酸塩および/またはアルカリ金属水酸化物であり、アルカリ金属がナトリウムおよび/またはカリウムである請求項9に記載の現像液組成物。
- 請求項9または10に記載の現像液組成物0.01~10重量%および水を含有する印刷版用水性現像液。
- 少なくとも(A)支持体、(B)感光性樹脂層、および(E)粘着防止層が順次積層された構成を有するフレキソ印刷版を請求項11に記載の現像液で現像する工程を有する印刷原版の製造方法。
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JP7319282B2 (ja) | 2018-02-16 | 2023-08-01 | ミラクロン コーポレーション | マスク要素前駆体およびレリーフ像形成システム |
WO2020196820A1 (ja) | 2019-03-28 | 2020-10-01 | 東洋紡株式会社 | フレキソ印刷版用現像液組成物、現像液および印刷原版の製造方法 |
US11940735B2 (en) | 2019-03-28 | 2024-03-26 | Toyobo Mc Corporation | Developer composition for flexographic printing plate, developer, and method of manufacturing printing original plate |
WO2021100496A1 (ja) | 2019-11-21 | 2021-05-27 | 富士フイルム株式会社 | フレキソ印刷版用水性現像液、フレキソ印刷版用水性現像濃縮液およびフレキソ印刷版の製造方法 |
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CN103370656B (zh) | 2016-02-10 |
ES2718101T3 (es) | 2019-06-27 |
US9005884B2 (en) | 2015-04-14 |
CN103370656A (zh) | 2013-10-23 |
PL2677365T3 (pl) | 2019-07-31 |
JPWO2012111238A1 (ja) | 2014-07-03 |
EP2677365A1 (en) | 2013-12-25 |
JP5305182B2 (ja) | 2013-10-02 |
EP2677365B1 (en) | 2019-01-23 |
US20130288185A1 (en) | 2013-10-31 |
EP2677365A4 (en) | 2015-04-29 |
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