JP6224458B2 - Plate film forming member and method for producing screen printing plate using plate film forming member - Google Patents

Description

The present invention relates to a plate film forming member used for forming a plate film in a screen printing plate and a method for producing a screen printing plate using the plate film forming member .

  When manufacturing a screen printing plate for screen printing, generally, a resin film is first formed by applying and drying a photosensitive resin solution on a mesh screen, and then exposing the resin film through a pattern mask. Subsequently, the plate film (resist) having a predetermined pattern shape is formed by developing with water or the like.

  However, this method tends to cause variations in the thickness of the plate film, and thus tends to cause variations in the thickness of the coating film formed by screen printing. In addition, the unevenness of the screen appears in the plate film as it is, so that the surface of the plate film tends to become rough, and the edge of the coating film formed by screen printing tends to become rough, which tends to deteriorate the printing accuracy. .

  In order to solve such a problem, a technique using a plate film forming member has also been performed. This plate film forming member is formed by forming a photosensitive resin film on a support substrate such as a PET film. When producing a screen printing plate using this plate film-forming member, first the resin film of the plate film-forming member is overlaid on the screen, and if necessary, water, photosensitive resin, etc. are applied from the back side of the film. To do. You may apply | coat water, photosensitive resin, etc. to the screen previously. As a result, the resin film is brought into close contact with the screen. Subsequently, the resin film is transferred to the screen by peeling off the supporting substrate. Thereby, the surface of the resin film on the screen is formed smoothly. The resin film is exposed through a pattern mask and subsequently developed with water or the like, thereby forming a plate film (resist) having a predetermined pattern shape on the screen. In the screen printing plate formed in this way, the surface of the plate film is smooth and variation in thickness is suppressed, the edge of the pattern after development becomes sharp, and printing accuracy can be improved. A method for producing a screen printing plate in this manner is called a direct method, and a plate film forming member used in the direct method is called a direct film or a direct method film (see Patent Document 1).

  However, even in the method using the plate film forming member, tackiness is easily developed on the surface of the resin film transferred onto the screen. For this reason, it is difficult to align the pattern mask during the exposure of the resin film, and the workability when the pattern mask is peeled off from the resin film after the exposure is likely to deteriorate. Moreover, when peeling a pattern mask from a resin film, there exists a possibility that a defective product may arise because a part of resin film adheres to a pattern mask.

Japanese Patent Publication No. 2002-91018 (paragraph 0020)

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned reasons, and in producing a screen printing plate, a plate film forming member capable of improving workability and improving yield and a screen using the plate film forming member. An object is to provide a method for producing a printing plate .

  The plate film forming member according to the first aspect of the present invention is a plate film forming member used for forming a plate film in a screen printing plate, and has a photosensitivity for forming the plate film. And a support base material that supports the resin layer, and an intermediate layer that is interposed between the support base material and the resin layer and has both water-solubility or water-dispersibility and transparency.

  In a second aspect of the present invention, in the first aspect, the intermediate layer is formed from polyvinyl alcohol.

  In a third aspect of the present invention, in the first aspect, the intermediate layer is formed of a water-soluble or water-dispersible fluororesin.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the intermediate layer contains a fluorine compound as an additive.

  In a fifth aspect of the present invention, in the fourth aspect, the fluorine compound contains a fluorine compound having an ethylenically unsaturated group.

  The plate forming member according to the sixth aspect of the present invention is the plate forming member according to any one of the first to fifth aspects, wherein the protective layer is overlapped on the surface of the resin layer opposite to the intermediate layer. In addition.

  By using the plate film forming member according to the present invention, the workability is improved and the yield of the screen printing plate is improved in producing the screen printing plate.

1 is a schematic cross-sectional view of a plate forming member showing an embodiment of the present invention. It is a schematic sectional drawing which shows the state which peeled the protective layer from the member for plate film formation shown in FIG. (A) thru | or (d) are sectional drawings which show the process of producing a screen printing plate using the plate film formation member by the said embodiment.

  As shown in FIG. 1, the plate film forming member 1 according to the present embodiment includes a resin layer 4 having photosensitivity, a support base 2 that supports the resin layer 4, and water-soluble or water-dispersible and transparent. And an intermediate layer 3 having both properties. That is, the support base material 2, the intermediate layer 3, and the resin layer 4 are laminated in this order, and the support base material 2 supports the intermediate layer 3 and the resin layer 4. Further, the plate film forming member 1 includes a protective layer 5. The protective layer 5 is overlaid on the surface of the resin layer 4 opposite to the intermediate layer 3.

  The support substrate 2 is preferably a flexible film having releasability from the intermediate layer 3. As long as such properties are exhibited, the specific material of the support substrate 2 is not limited, but examples of the material include polyethylene, polyvinyl chloride, and polyester. In particular, the support substrate 2 is preferably formed from polyethylene terephthalate.

  The thickness of the support substrate 2 is appropriately adjusted so that the intermediate layer 3 and the resin layer 4 can be supported by the support substrate 2 and can be easily peeled off from the intermediate layer 3 when the screen printing plate 10 is manufactured. For example, a range of 5 to 300 μm is preferable, and a range of 10 to 100 μm is more preferable.

  As described above, the intermediate layer 3 has both water solubility or water dispersibility and transparency. The transparency in the intermediate layer 3 means that light having a wavelength having the ability to sensitize the resin layer 4 is transmitted. That is, when the resin layer 4 is sensitive to visible light, the intermediate layer 3 is visible light transmissive, and when the resin layer 4 is sensitive to ultraviolet light, the intermediate layer 3 is ultraviolet transmissive. In particular, the transmittance of light having a wavelength capable of exposing the resin layer 4 of the intermediate layer 3 is preferably 50% or more, more preferably 70% or more, and particularly preferably 80% or more. .

  Moreover, when the dimension is 2 cm × 2 cm × 6 μm, the intermediate layer 3 is dissolved in the ion-exchanged water within 3 minutes by being put in ion-exchanged water having a temperature of 22 ° C. and a volume of 300 mL, and stirring. If dispersed, it can be said to have water solubility or water dispersibility. The dissolution or dispersion time is particularly preferably within 1 minute.

  Although there is no restriction | limiting in particular in the material of the intermediate | middle layer 3, For example, forming from polyvinyl alcohol is preferable. When the intermediate layer 3 is formed from polyvinyl alcohol, the intermediate layer 3 exhibits excellent water solubility and transparency.

  When the intermediate layer 3 is formed from polyvinyl alcohol, the saponification degree of polyvinyl alcohol is preferably 70% or more. However, as long as water solubility is ensured, the saponification degree of a part or all of the polyvinyl alcohol may be 70% or less. The polymerization degree of polyvinyl alcohol is not particularly limited, but is preferably in the range of 300 to 5000.

  Moreover, it is also preferable that the intermediate | middle layer 3 contains a fluorine compound. In this case, when producing the screen printing plate 10, the fluorine compound can be attached to the surface of the resin layer 4 after development from the intermediate layer 3, whereby the fluorine compound is attached to the surface of the plate film 9 in the screen printing plate 10. Can be attached. Thereby, the solvent resistance of the plate film 9 is improved, and the durability (press life) of the plate film 9 when the screen printing plate 10 is used for screen printing is improved.

  As the case where the intermediate layer 3 contains a fluorine compound, the case where the intermediate layer 3 is formed from a water-soluble or water-dispersible fluororesin, and the case where the intermediate layer 3 contains a fluorine compound as an additive, Can be mentioned. The intermediate layer 3 may be formed of a water-soluble or water-dispersible fluororesin and may contain a fluorine compound as an additive.

  Examples of the water-dispersible fluororesin include Plusprint EM-31 (fluorine-containing resin emulsion) manufactured by Kyoyo Chemical Industry Co., Ltd.

  Further, when the intermediate layer 3 contains a fluorine compound as an additive, examples of the fluorine compound include “Fargent” series such as “Factent 2089” manufactured by Neos Co., Ltd., S-141, S manufactured by AGC Seimi Chemical Co., Ltd. Surfactants such as -241, Megafac F-552 manufactured by DIC Corporation, and the like.

  Moreover, when the intermediate layer 3 contains a fluorine compound as an additive, it is also preferable that the fluorine compound contains a fluorine compound having an ethylenically unsaturated group. In this case, when the screen printing plate 10 is produced, a fluorine compound having an ethylenically unsaturated group can be chemically bonded to the surface of the resin layer 4 at the time of exposure, whereby the plate film 9 in the screen printing plate 10 is obtained. The fluorine compound can be firmly attached to the surface of the film. Thereby, the solvent resistance of the plate film 9 is further improved. Examples of the fluorine compound having an ethylenically unsaturated group include Kyoeisha Chemical Co., Ltd. light ester FM-108, acrylate FA-108, and the like.

  In the case where the intermediate layer 3 contains a fluorine compound as an additive, the ratio of the fluorine compound to the intermediate layer 3 is not particularly limited, but in order to sufficiently improve the solvent resistance of the plate film 9, It is preferable that the ratio of the fluorine compound to the minute is in the range of 0.001 to 50% by mass.

  The method for forming the intermediate layer 3 will be described in more detail.

  The composition of the composition for forming the intermediate layer 3 is appropriately set according to the composition of the intermediate layer 3. For example, the composition for forming the intermediate layer 3 includes an aqueous solution containing polyvinyl alcohol in an amount of preferably 1 to 20% by mass, more preferably 1 to 10% by mass. This composition may further contain at least one of a fluorosurfactant and a fluororesin, preferably in the range of 0.01 to 20% by mass, more preferably in the range of 0.1 to 10% by mass. Good. The composition for forming the intermediate layer 3 may contain a water-soluble or water-dispersible fluororesin without containing polyvinyl alcohol. Moreover, the composition for forming the intermediate | middle layer 3 may further contain an appropriate amount of antifoamers, a leveling agent, etc. as needed.

  The intermediate layer 3 is formed by applying the composition for forming the intermediate layer 3 onto a support substrate using a coating device such as a slit coater, comma coater, bar coater, applicator, and drying. Can do.

  The thickness of the intermediate layer 3 is set as appropriate. However, the thickness of the intermediate layer 3 is set to 0. 0 from the viewpoints of tack prevention, oxygen failure prevention, halation prevention, and the like. A range of 01 to 10 μm is preferable, and a range of 0.1 to 5 μm is more preferable.

  The resin layer 4 has photosensitivity as described above. The photosensitive resin composition for forming the resin layer 4 is a negative photosensitive resin composition (photo-curable resin composition) that uses a photoreaction by energy rays such as visible light, ultraviolet rays, and far ultraviolet rays. It is preferable that development is possible with water or an alkaline aqueous solution.

  Examples of the photosensitive resin composition in the present embodiment include a diazo resin composition (for example, a resin composition containing a water-soluble polymer and a diazo resin (photosensitive agent)), and a diazo radical resin composition (for example, a water-soluble heavy resin). Resin composition containing coalescence, photosensitive unsaturated compound, and diazo resin), radical resin composition (for example, resin composition containing water-soluble polymer and photosensitive unsaturated compound), SBQ resin composition (For example, a resin composition containing a water-soluble polymer and SBQ (stilbazolium, photoinitiator)), an SBQ radical resin composition (for example, a resin composition containing a water-soluble polymer, SBQ, and a photosensitive unsaturated compound) Product), SBQ diazo radical resin composition (for example, a resin composition containing a water-soluble polymer, SBQ, a photosensitive unsaturated compound, and a diazo resin). .

  In particular, when a diazo radical resin composition, radical resin composition, SBQ radical resin composition, or SBQ diazo radical resin composition is used as the photosensitive resin composition, an ethylenically unsaturated group is present in the intermediate layer 3. When a fluorine compound having a fluorine compound is contained, the fluorine compound having an ethylenically unsaturated group is likely to react with the photosensitive resin composition by a radical polymerization reaction when the photosensitive resin composition is cured by exposure. A fluorine compound having an ethylenically unsaturated group is likely to adhere firmly to the plate film 9.

  When a diazo radical resin composition, radical resin composition, SBQ radical resin composition, or SBQ diazo radical resin composition is used as the photosensitive resin composition, these compositions are liquid. In such a case, the tackiness of the resin layer 4 is particularly strong. In such a case, it is particularly effective to overlay the intermediate layer 3 on the resin layer 4 as in this embodiment.

  The structure of the photosensitive resin composition will be described in more detail.

  In the present embodiment, the photosensitive resin composition is preferably an aqueous emulsion containing a water-soluble polymer. The photosensitive resin composition may contain both a water-soluble polymer and a water-insoluble polymer.

  Examples of the water-soluble polymer include a partially saponified vinyl acetate polymer obtained by saponifying a vinyl acetate polymer by known alkali hydrolysis. The saponification degree of this partially saponified vinyl acetate polymer is preferably 70 mol% or more. The degree of polymerization of the partially saponified vinyl acetate polymer is preferably in the range of 300 to 5,000.

  Vinyl acetate polymers for obtaining partially saponified vinyl acetate polymers include vinyl acetate homopolymers, copolymers and derivatives thereof. Specific examples of vinyl acetate polymers include vinyl acetate homopolymers, vinyl acetate copolymers with ethylenically unsaturated monomers copolymerizable with vinyl acetate, lower (C1 to C4) acetalization such as formalization and butyralization. Polyvinyl acetate derivative, polyvinyl acetate derivative acetalized with p-benzaldehyde sulfonic acid, β-butyraldehyde sulfonic acid, o-benzaldehyde sulfonic acid, 2,4-benzaldehyde disulfonic acid, etc., and side chain of vinyl acetate polymer Derivatives. Examples of the ethylenically unsaturated monomer that gives the above-mentioned vinyl acetate copolymer include vinyl compounds such as ethylene, vinyl chloride, propylene, butylene, and styrene; acrylates such as methyl acrylate and methyl methacrylate; acrylamide, N, N- Acrylamides such as dimethylacrylamide; Unsaturated carboxylic acids such as acrylic acid, methacrylic acid, crotonic acid, maleic acid, fumaric acid, and itaconic acid; Cationic unsaturated monomers such as dimethylaminoethyl methacrylate, vinylimidazole, vinylpyridine, and vinylsuccinimide Examples of the polymers.

  When the photosensitive resin composition has photocurability, the photosensitive resin composition preferably contains a water-soluble photocrosslinking agent. Moreover, it is also preferable that the water-soluble polymer in the photosensitive resin composition has a photocrosslinkable group.

  Although it does not restrict | limit especially as a water-soluble photocrosslinking agent, Water-soluble diazo resin and dichromate are illustrated. In particular, a water-soluble diazo resin is suitable. Specific examples of the water-soluble diazo resin include a water-soluble diazonium resin that is a sulfate of p-diazodiamine-paraformaldehyde condensate and an anion complex such as a phosphate and a zinc chloride double salt. More specific examples include diamino compounds of diphenylamines such as paraaminodiphenylamine, 4-amino-4′-methyldiphenylamine, 4-amino-4′-methoxydiphenylamine, 4-amino-4′-nitrodiphenylamine, and paraformaldehyde. And those condensed with aldehydes such as acetaldehydes. Examples of the dichromate include ammonium dichromate, potassium dichromate, sodium dichromate and the like.

  The ratio of the water-soluble photocrosslinking agent is preferably in the range of 0.1 to 20 parts by weight with respect to 100 parts by weight in total of the water-soluble polymer and the water-insoluble polymer in the photosensitive resin composition. .

  Examples of the water-soluble polymer having a photocrosslinkable group include water-soluble polymers having a styrylpyridinium group or a styrylquinolinium group. Such a water-soluble polymer having a photocrosslinkable group is obtained by, for example, adding a formylstyrylpyridinium salt or a formylstyrylquinolinium salt to an alcoholic —OH group contained in a polyvinyl alcohol polymer by an acetalization reaction. Is obtained. A method for synthesizing such a water-soluble polymer having a photocrosslinkable group is known, and Japanese Patent Publication No. 55-23163, Japanese Patent Publication No. 55-62905, Japan This is disclosed in detail in Japanese Patent Application Laid-Open No. 56-11906. A single type or a plurality of types of photocrosslinkable groups may be introduced into the water-soluble polymer as necessary. This photocrosslinkable group is preferably added in an amount of 0.3 to 20 mol%, particularly 0.5 to 10 mol%, in the water-soluble polymer.

  When the photosensitive resin composition contains a water-insoluble polymer, examples of the water-insoluble polymer include polyvinyl acetate, vinyl acetate / ethylene copolymer, vinyl acetate / acrylic acid ester copolymer (here acrylic acid Examples of the ester include methyl acrylate, 2-ethylhexyl acrylate, etc.), styrene / butadiene copolymer, methyl methacrylate / butadiene copolymer, acrylonitrile / butadiene copolymer, chloroprene polymer, isoprene polymer. , Poly (meth) acrylic acid, polyvinyl chloride, polyvinylidene chloride, polystyrene, silicone resin, polyethylene, polyurethane, fluororesin and the like. This water-insoluble polymer is preferably an emulsion.

  The mass ratio of the water-soluble polymer to the water-insoluble polymer in the photosensitive resin composition is preferably in the range of 100: 20 to 100: 4000. In this case, development of the photosensitive resin composition with water becomes possible, and appropriate strength is imparted to the plate film 9.

  The photosensitive resin composition may further contain a compound having a photoreactive ethylenically unsaturated group (photosensitive unsaturated compound). The photosensitive unsaturated compound is added as it is or after being prepolymerized or oligomerized. The proportion of the photosensitive unsaturated compound is preferably in the range of 5 to 1000 parts by weight, preferably in the range of 20 to 500 parts by weight, with respect to 100 parts by weight of the total of the water-soluble polymer and the water-insoluble polymer. More preferably.

  Examples of the photosensitive unsaturated compound include compounds having one or more photoactive ethylenically unsaturated groups such as acryloyl group, methacryloyl group, allyl group, vinyl ether group, acrylamide group, and methacrylamide group. Specific examples of the photosensitive unsaturated compound include trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, and dipentaerythritol hexa. (Meth) acrylate, 1,4-butanediol diacrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, tripropylene glycol di (meth) acrylate, 2,2-bis [ 4-((meth) acryloxyethoxy) phenyl] propane, 2,2-bis [4-((meth) acryloxy-diethoxy) phenyl] propane, 2-hydroxy-1,3-di (meth) acryloxypropane, Echi Glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, phenoxyethyl (meth) acrylate, phenoxydiethylene glycol (meth) acrylate, methoxydiethylene glycol (meth) acrylate, tetrahydrofurfuryl (meta) ) Acrylate, dicyclopentenyloxyethyl (meth) acrylate, 1-methoxycyclododecadienyl (meth) acrylate, β- (meth) acryloyloxyethyl hydrogen phthalate, β- (meth) acryloyloxyethyl hydrogen saxi Nate, 3-chloro-2-hydroxypropyl (meth) acrylate, triallyl isocyanurate, methoxyethyl vinyl ether, tert-butyl Vinyl ether, lauryl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isodecyl (meth) acrylate, stearyl (meth) acrylate, benzyl (meth) acrylate, bisphenol A-diepoxyacrylic acid adduct, tolylene diisocyanate Products obtained by adding acrylic acid to a polyfunctional epoxy resin such as a reaction product of 2-hydroxypropyl (meth) acrylate and a reaction product of phenylisocyanurate and 2-hydroxyethyl (meth) acrylate, or a polybasic acid (anhydrous) Product), maleic acid glycol ester, (meth) acrylamide, N-methoxymethyl (meth) acrylamide, N, N-dimethyl (meth) acrylamide, (meth) acryloylmorpholine, N-methylol (meth) ) Acrylamide, hydroxypropyl (meth) acrylate, polyethylene glycol di (meth) acrylate, methylenebis (meth) acrylamide, 2-hydroxyethyl (meth) acrylate, 2,2-bis [4-methacryloyloxy / polyethoxyphenyl] propane, etc. Is mentioned. These compounds are used individually by 1 type, or multiple types are used together.

  The photosensitive resin composition may contain a photopolymerization initiator. Photoinitiators include benzoyl alkyl ether, Michler's ketone, di-tert-butyl peroxide, tribromoacetophenone, anthraquinone derivatives such as tert-butylanthraquinone, and thioxanthone derivatives such as chlorothioxanthone. Substances that easily generate radicals are used. Furthermore, the photosensitive resin composition is a known light such as a benzoic acid type or a tertiary amine type such as p-dimethylaminobenzoic acid ethyl ester, p-dimethylaminobenzoic acid isoamyl ester, or 2-dimethylaminoethylbenzoate. You may contain a polymerization accelerator, a sensitizer, etc. The ratio of the photopolymerization initiator is preferably in the range of 0.1 to 15 parts by weight and more preferably in the range of 0.3 to 10 parts by weight with respect to 100 parts by weight of the photosensitive unsaturated compound.

  The photosensitive resin composition may further contain waxes. In this case, the water resistance, solvent resistance and water repellency of the plate film 9 formed from the photosensitive resin composition are improved. Examples of the waxes include natural and synthetic hydrocarbon waxes, glycerides, and waxes, and oxides and acid-modified products thereof. Specifically, as natural waxes, hydrogenated hydrogenated fats and oils, hydrogenated beef tallow or pork fat, beeswax, hydrogenated whale wax, carnauba wax, canderia wax, wood wax, bran wax, and other animal waxes, paraffin wax And mineral waxes such as microcrystalline wax, montan wax, and sericin wax. Examples of the synthetic wax include low molecular weight polyethylene wax, polypropylene wax, and wax by Fischer-Tropsch method. Among the above waxes, paraffin wax, low molecular weight polyethylene wax, and polypropylene wax are particularly preferable. In blending the wax into the photosensitive resin composition, it is preferable to use a wax emulsion obtained by emulsifying the wax. The wax emulsion may contain a cationic anionic, nonionic and amphoteric surfactant as required. The ratio of waxes in the photosensitive resin composition is preferably in the range of 0.2 to 10% by mass with respect to the solid content in the photosensitive resin composition, and is in the range of 4 to 10% by mass. Further preferred.

  The photosensitive resin composition may further contain an appropriate additive. Examples of such additives include water, organic solvents and other solvents; leveling agents such as silicone, (meth) acrylate copolymers and fluorine-based surfactants; hydroquinone, hydroquinone monomethyl ether, pyrogallol, tert-butylcatechol, and phenothiazine. Polymerization inhibitors such as: antihalation agents, antifoaming agents, antioxidants, colorants such as organic or inorganic pigments and dyes, various additives such as natural or synthetic rubber powders; and to improve dispersion stability And surfactants, polymer dispersants, and the like.

  As the photosensitive resin composition, a positive photosensitive resin composition that utilizes a photoreaction by energy rays such as visible light, ultraviolet rays, and far ultraviolet rays, and that can be developed with water, an alkaline aqueous solution, or the like is used. May be. Examples of the positive photosensitive resin composition include a photosensitive resin composition containing a novolak resin and an α-naphthoquinone diazide compound, a photosensitive resin composition containing a novolac resin and an o-naphthoquinone diazide compound, and the like. .

  The resin layer 4 is formed, for example, by applying a photosensitive resin composition on the intermediate layer 3 by an appropriate technique, and subsequently drying the photosensitive resin composition. Although the thickness of the resin layer 4 is adjusted as appropriate, the resin layer 4 has good photocurability, durability (printing durability), printability, resolution, printing thickness, and adhesion to a screen (indentation). In order to ensure the above, it is preferably in the range of 5 to 1000 μm, more preferably in the range of 5 to 50 μm.

  The protective layer 5 is used as necessary in order to protect the resin layer 4 from being damaged by external stress. Although the material in particular of the protective layer 5 is not restrict | limited, Flexible films, such as polyethylene, a polypropylene, polyester, vinyl chloride, are mentioned. For example, the protective layer 5 is formed by sticking a film formed of such a material on the resin layer 4. The thickness of the protective layer 5 is not particularly limited, but is preferably in the range of 1 to 100 μm, for example, and more preferably in the range of 10 to 30 μm.

  An example of a method for producing the screen printing plate 10 using such a plate film forming member 1 will be described.

  First, a mesh-like screen 6 is prepared. The screen 6 is not particularly limited as long as it can be applied to the screen printing plate 10. The screen 6 is preferably supported inside a frame 7 made of aluminum or wood.

  Water or a photosensitive resin composition is applied to the screen 6 in order to improve adhesion to the resin layer 4 as necessary. Subsequently, the protective layer 5 is peeled from the plate film forming member 1 (when the protective layer 5 is provided), and then the resin layer 4 of the plate film forming member 1 is overlaid on the screen 6. Further, if necessary, water or a photosensitive resin composition is applied to the surface of the screen 6 opposite to the resin layer 4. Furthermore, it heat-drys on suitable conditions as needed. Thereby, the resin layer 4 is adhered to the screen 6.

  Next, the support base material 2 is peeled from the intermediate layer 3. The intermediate layer 3 is left overlapping the resin layer 4.

  Next, the pattern mask 8 (mask film) is overlaid on the intermediate layer 3, the resin layer 4 is exposed through the pattern mask 8, and then the pattern mask 8 is removed from the resin layer 4. In this case, since the intermediate layer 3 has transparency, the resin layer 4 is exposed through the intermediate layer 3. Further, the presence of the intermediate layer 3 prevents the pattern mask 8 from coming into direct contact with the resin layer 4, which makes it difficult for the pattern mask 8 to adhere to the resin layer 4 and to peel off, or a part of the resin layer 4 may be part of the pattern mask. No troubles such as sticking to 8 occur.

  Next, the intermediate layer 3 and the exposed resin layer 4 are immersed in a developer such as water or an alkaline aqueous solution. Thereby, the water-soluble intermediate layer 3 is removed from the resin layer 4, and the resin layer 4 is further developed. As a result, a plate film 9 having a pattern shape corresponding to the pattern mask 8 remains on the screen 6, whereby a screen printing plate 10 is obtained.

  Specific examples of the present invention will be described below. In addition, this invention is not restrict | limited only to a following example.

[Example 1]
A polyethylene terephthalate film having a thickness of 23 μm was prepared as a supporting substrate.

  By applying a 6.5 wt% aqueous solution of PVA-235 (manufactured by Kuraray Co., Ltd.) with a wet thickness of 20 μm on this supporting substrate with a slit coater, and heating in air at 80 ° C. for 10 minutes, An intermediate layer having a thickness of 1.3 μm was formed.

  Subsequently, a diazo radical photosensitive resin composition (manufactured by Kyoyo Chemical Industry Co., Ltd., plus print PP500R-24) is applied on the intermediate layer using a slit coater, and then heated at 80 ° C. for 10 minutes. Thus, a resin layer having a thickness of 18 μm was formed.

  Subsequently, a polyethylene film having a thickness of 18 μm was stuck as a protective layer on the resin layer.

  Thus, a plate film forming member was obtained.

[Example 2-8]
The composition of the composition for forming the intermediate layer was changed as shown in the following table. Otherwise, a plate film forming member was obtained in the same manner and under the same conditions as in Example 1.

[Comparative Example 1]
A polyethylene terephthalate film having a thickness of 23 μm was prepared as a supporting substrate.

  A diazo radical-based photosensitive resin composition (manufactured by Kyoyo Chemical Industry Co., Ltd., plus print PP500R-24) was applied on the support substrate using a slit coater without forming an intermediate layer, and subsequently By heating at 80 ° C. for 10 minutes, a resin layer having a thickness of 18 μm was formed.

  Subsequently, a polyethylene film having a thickness of 18 μm was stuck as a protective layer on the resin layer.

  Thus, a plate film forming member was obtained.

The details of the components shown in the following table are as follows.
PVA-235: Kuraray Co., Ltd. polyvinyl alcohol, product number PVA-235, saponification degree 88%, polymerization degree 3500.
PVA-217: polyvinyl alcohol manufactured by Kuraray Co., Ltd., product number PVA-217, saponification degree 88%, polymerization degree 1700.
-S-141: AGC Seimi Chemical Co., Ltd. surfactant, product number S-141.
-F-2089: Neos Co., Ltd. surfactant, product number F-2089.
-EM-31: manufactured by Kyoyo Chemical Industry Co., Ltd. (fluorine-containing resin emulsion, product number EM-31, solid content 26 mass%.

  In each of Examples 1, 4, 6, and 8, a 6 μm-thick film having the same composition as that of the intermediate layer was formed, and the light transmittance at a wavelength of 375 nm was determined by double beam spectroscopy manufactured by Shimadzu Corporation. Measurement was performed using a total of UV-190. As a result, the light transmittances in Examples 1, 4, 6, and 8 were 91.1%, 86.8%, 89.2%, and 76.5%, respectively. Therefore, it can be evaluated that the light transmittance of the actual intermediate layer is higher than these.

  In each of Examples 1, 4, 6, and 8, a sample having the same composition as the intermediate layer and a size of 2 cm × 2 cm × 6 μm was prepared, and this sample was ion-exchanged water having a temperature of 22 ° C. and a volume of 300 mL. And stirred. As a result, in Examples 1, 4 and 6, the sample was completely dissolved or dispersed within 1 minute. In Example 8, the sample was not completely dissolved or dispersed in 1 minute, but was completely dissolved or dispersed within 2 minutes.

[Preparation of screen printing plate]
A 300 mesh polyester bag was prepared as a screen, and this screen was provided on the inside of an aluminum frame.

  After the protective layer is peeled from the plate film forming member obtained in each of the examples and comparative examples, the resin layer of the plate film forming member is overlaid on the screen, and the support substrate side of the plate film forming member is a roller. At the same time, the emulsified emulsion (plus print PP500R-24) was put in a bucket and pressed from the opposite side of the screen film forming member. Thereby, the resin layer was adhered to the screen by dissolving a part of the resin layer with the adhesive emulsion. Subsequently, this resin layer was sufficiently dried by heating at 40 ° C. for 30 minutes. Subsequently, the supporting substrate was peeled from the plate film forming member.

  Next, the mask film on which a negative pattern was drawn was aligned and overlaid on the intermediate layer in Examples 1 to 8 and on the resin layer in Comparative Example 1. At this time, in Comparative Example 1, the mask film adhered to the resin layer, and positioning was difficult, but in Examples 1 to 8, the mask film could be easily moved on the intermediate layer. Position adjustment was easy.

  Subsequently, a 3 kW metal halide lamp was used as the light source, and the resin layer was exposed under the conditions of a distance of 1 m between the light source and the resin layer and an irradiation time of 60 seconds.

  Subsequently, the mask film was removed. In this case, in Comparative Example 1, the mask film was hardly peeled off from the resin layer, and it took much time. On the other hand, in Examples 1 to 8, the mask film could be easily removed from the intermediate layer.

  Subsequently, the resin layer was developed by using water as a developer. During this development, in Examples 1 to 8, the intermediate layer was removed together with the non-exposed portion of the resin layer. Thereby, a screen printing plate was obtained.

[Evaluation test]
(Tackiness)
As an index indicating the ease of sticking between the plate film forming member and the mask film during exposure, tackiness was evaluated as follows.

  After the protective layer was peeled off from the plate film forming member, it was heated and dried at 40 ° C. for 30 minutes and then allowed to cool to room temperature (25 ° C.). Subsequently, the tester strongly pressed the surface of the resin layer with a finger, and the tackiness was evaluated based on the finger feel felt by the tester himself and the appearance of the resin layer after being pressed with the finger. . As a result, when the finger is not sticky and the fingerprint is not recognized on the resin layer, it is evaluated as A, and when the finger is slightly sticky and the fingerprint is found on the resin layer. Evaluation was B, and a case where a noticeable stickiness was felt on the finger and a fingerprint mark was observed on the resin layer was evaluated as C.

(Water repellency)
As an index of water resistance during printing, the water repellency of the plate film was evaluated as follows. One drop of water was dropped from the dropper on the surface of the plate film in the screen printing plate obtained in each example and comparative example, and the state of the water drop on the plate film was observed. As a result, the case where the water droplet was spherical was evaluated as A, the case where the water droplet spread slightly on the plate film was evaluated as B, and the case where the water droplet spread greatly on the plate film was evaluated as C.

(Solvent resistance (MEK repellency))
As an index of solvent resistance at the time of printing, MEK repellency of the plate film was evaluated as follows. A droplet of MEK (methyl ethyl ketone) was dropped from a dropper on the surface of the plate film in the screen printing plate obtained in each of the examples and comparative examples, and the state of the droplet on the plate film was observed. As a result, A was evaluated when the droplet was spherical, B was evaluated when the droplet spread slightly on the plate film, and C was evaluated when the droplet spread greatly on the plate film.

  These results are shown in the table below.

DESCRIPTION OF SYMBOLS 1 Plate film forming member 2 Support base material 3 Intermediate | middle layer 4 Resin layer 5 Protective layer

Claims (6)

A plate film forming member used for forming a plate film in a screen printing plate,
A photosensitive resin layer for forming the plate film;
A support substrate for supporting the resin layer;
Intervening between the support substrate and the resin layer, comprising a water-soluble or water-dispersible and transparent intermediate layer ,
A plate film forming member , wherein the intermediate layer is formed of a water-soluble or water-dispersible fluororesin . A plate film forming member used for forming a plate film in a screen printing plate,
A photosensitive resin layer for forming the plate film;
A support substrate for supporting the resin layer;
Intervening between the support substrate and the resin layer, comprising a water-soluble or water-dispersible and transparent intermediate layer,
The intermediate layer contains a fluorine compound as an additive
Plate forming member. The plate film forming member according to claim 1, wherein the intermediate layer further contains polyvinyl alcohol. The plate film forming member according to claim 2 , wherein the fluorine compound contains a fluorine compound having an ethylenically unsaturated group. Plate film forming member according to claim 1, any one of 4 said intermediate layer having a protective layer which is overlaid on the opposite side more of the resin layer. A method for producing a screen printing plate using the plate film forming member according to any one of claims 1 to 5,
Overlaying the resin layer on a screen;
Peeling the support substrate from the intermediate layer;
Overlaying a pattern mask on the intermediate layer, exposing the resin layer through the pattern mask;
Removing the intermediate layer and developing the resin layer;
A method for producing a screen printing plate, comprising:

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