JP2018099887A - Screen version - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screen plate having improved adhesion between a screen gauze made of synthetic fibers and a shielding film. SOLUTION: A plate frame, a screen gauze made of synthetic fibers stretched on the plate frame, and a shielding film formed on the screen gauze for providing an opening having a shape corresponding to a predetermined printing pattern. The surface of the screen gauze has a ratio of the surface free energy derived from the polar component to the surface free energy derived from the polar component and the non-polar component of 15% or more and 70% or less. The surface is a screen plate characterized in that the ratio of the surface free energy derived from the polar component to the surface free energy derived from the polar component and the non-polar component is 10% or more and 50% or less. [Selection diagram] FIG. 9

Description

  The present invention relates to a screen plate having improved adhesion between a shielding film and a screen ridge.

  Conventionally, screen printing has been used for manufacturing electronic component substrates such as printed circuits, IC circuits, various display devices, and electrodes such as solar cells. In recent years, electronic component substrates and electrodes have been increasingly miniaturized, and screen printing that is produced by printing these substrates is required to print fine print patterns with high dimensional accuracy.

  In general, a plate used for screen printing has a plate frame and a screen ridge stretched on the plate frame in a state where a predetermined tension is applied, and forms a shielding film on one or both sides of the screen ridge. An opening is formed at a position corresponding to a predetermined printing pattern and used for screen printing. The opening and the shielding film are formed by applying a photosensitive resin solution (emulsion) on one or both sides of the screen basket and drying or adhering the photosensitive resin film to form a resin film. Cover the area with a mask with a shape corresponding to a predetermined print pattern, irradiate the resin film with a part of the area covered with the mask with visible light and / or ultraviolet light, and then dissolve the soluble area of the resin film with water or chemicals. This is performed by forming the shielding film and the opening by removing them by the method described above. The soluble region of the resin film varies depending on the reaction of the resin film (photosensitive resin) caused by irradiation with visible light or ultraviolet light. When the reaction of the resin film is a photocrosslinking reaction, visible light or ultraviolet light If the resin film region that has not been irradiated (the region covered with the mask) becomes a soluble region and the reaction of the resin film is a photolysis reaction, the resin film that has been irradiated with visible light or ultraviolet light A region (region not covered with a mask) is a soluble region.

  Here, when the adhesion between the shielding film and the screen ridge is weak, the shielding film may peel from the screen ridge by repeated printing. For this reason, a screen plate having poor adhesion between the shielding film and the screen ridge may not be able to repeatedly print a precise print pattern.

  In order to solve such a problem, in Patent Document 1, a diamond-like carbon (DLC) film is formed on a stainless steel screen so that the adhesion between the shielding film made of a photosensitive resin and the screen is improved. Technology to enhance has been proposed.

JP 2011-218673 A

  However, since the DLC film is formed in a high-temperature atmosphere such as 150 to 250 degrees, when the screen ridge is composed of fibers, the fibers constituting the screen ridge are thermally contracted at the stage of forming the DLC film, There is a problem that the strength of the screen wrinkles decreases. In particular, when synthetic fibers are used as the fibers constituting the screen wrinkles, the heat shrinkage of the fibers and the strength reduction of the screen wrinkles become significant. Therefore, the technique disclosed in Patent Document 1 is a screen wrinkle made of synthetic fibers. There is a problem that it is difficult to apply.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a screen plate having improved adhesion between a screen ridge and a shielding film using synthetic fibers.

The gist of the present invention is as follows.
[1] Plate frame,
A screen rod made of synthetic fiber, stretched on the plate frame;
A shielding film for forming an opening having a shape corresponding to a predetermined printing pattern, formed on the screen ridge,
The surface of the screen ridge has a ratio of the surface free energy derived from the polar component to the surface free energy derived from the polar component and the nonpolar component of 15% or more and 70% or less,
The screen plate, wherein the surface of the shielding film has a ratio of the surface free energy derived from the polar component to the surface free energy derived from the polar component and the nonpolar component of 10% or more and 50% or less.
[2] The screen plate according to [1], wherein the synthetic fiber includes at least a liquid crystal polymer.
[3] The screen plate according to [1] or [2], wherein the synthetic fiber is a monofilament.
[4] The screen plate according to any one of [1] to [3], wherein the shielding film is a film formed using a photosensitive resin.
[5] The ratio of the surface free energy derived from the polar component to the surface free energy derived from the polar component and the nonpolar component is higher on the surface of the screen wall than the surface of the shielding film [1] To 4. The screen plate according to any one of [4].

  ADVANTAGE OF THE INVENTION According to this invention, the screen plate which improved the adhesiveness of the screen wrinkles and shielding film which use a synthetic fiber can be provided.

It is the schematic which shows a screen ridge. It is a fragmentary sectional view of a screen cage. It is a flowchart which shows the procedure of each process at the time of manufacturing a screen version. It is a figure explaining the process at the time of manufacturing a screen plate (screen extending | stretching process). It is a figure explaining the process at the time of manufacturing a screen plate (resin film formation process). It is a figure explaining the process at the time of manufacturing a screen plate (mask pasting process). It is a figure explaining the process at the time of manufacturing a screen plate (ultraviolet irradiation process). It is a figure explaining the process at the time of manufacturing a screen plate (development process). It is the schematic which shows a screen version.

  Hereinafter, embodiments of the present invention will be described. 1, 2, and 4 to 9, the Z axis and the Y axis are orthogonal to each other, and the axis orthogonal to each of the Z axis and the Y axis is an X axis. In the present embodiment, the Z-axis direction is the thickness direction of the screen ridge 1.

  As shown in FIG. 9, the screen plate 100 of the present embodiment includes a plate frame 2, a screen ridge 1 stretched on the plate frame 2, and a shielding film 20 formed on the screen ridge 1. First, the screen cage 1 will be specifically described.

  The screen basket 1 is one of the members constituting the screen plate 100 used for screen printing, and is a fabric for holding ink and transferring the held ink to a printing material. As shown in FIG. 1, the screen kite 1 includes a plurality of warps 1a and a plurality of wefts 1b made of synthetic fibers.

  Synthetic fibers constituting the warp 1a and the weft 1b include, for example, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), polyester such as liquid crystal polyester, nylon, and polyphenylsulfone (PPS). Synthetic fibers formed from polyetheretherketone (PEEK) or synthetic fibers obtained by combining two or more of these can be used, and among these, it is preferable to use synthetic fibers formed from nylon or polyester. Moreover, the synthetic fiber formed from liquid crystal polymers, such as liquid crystal polyester, has a stretching property and is excellent in dimensional stability. For this reason, when the synthetic fiber containing a liquid crystal polymer is used as the warp 1a and the weft 1b, the warp 1a and the weft 1b are not easily deformed even if screen printing is repeatedly performed. Therefore, a synthetic fiber containing a liquid crystal polymer is particularly preferable because it is suitable for forming a precise printed pattern that is repeatedly performed. When the warp 1a and the weft 1b are composed of two or more kinds of materials, they are obtained by mixing core-sheath fibers in which the material of the core part and the material of the sheath part are different, or two or more kinds of melted materials. A core-sheath fiber in which a material obtained by melting and mixing two or more kinds of materials is used as a blend type fiber, a core part or a sheath part, or a plurality of island parts and islands extending in the longitudinal direction of the fiber Sea island type fiber etc. from which the material of the sea part surrounding the part differs may be sufficient. Furthermore, a core-sheath type composite fiber in which an island part and a sea part are formed in a sheath part or a core part may be used. A printed pattern is a pattern (including figures, characters, lines, etc.) formed by a printed coating film transferred to a substrate, and a liquid crystal polymer is a polymer that exhibits liquid crystallinity in a molten or solution state. It is.

The warp 1a and the weft 1b constituting the screen ridge 1 may be monofilament or multifilament. The warp 1a may be a multifilament, the weft 1b may be a monofilament, or vice versa. From the viewpoint of improving printing accuracy (for example, sharpness and resolution of printed matter) and durability of the printed coating film, both the warp 1a and the weft 1b are preferably monofilaments. The monofilament may be composed of a single material, or may be composed of two or more materials having different characteristics. Further, the ratio of the surface free energy γs ^p derived from the polar component to the surface free energy γs derived from the polar component and the non-polar component on the surface of the screen 1 (hereinafter also referred to as “polar ratio”) is 15% or more and 70%. If not outside the following range, the surface of the warp 1a or the weft 1b may be modified by coating with an organic substance or an inorganic substance.

  As shown in FIG. 1, the plurality of warps 1a and the plurality of wefts 1b are woven up and down alternately in the Z-axis direction, and constitute a plain weave composition. In the screen ridge 1, the woven structure is not particularly limited, and a twill weave, satin weave, or the like can be used. However, the woven structure of the screen ridge 1 is preferably a plain weave from the viewpoint of reducing the thickness of the screen ridge 1 in the Z-axis direction and making it less likely to cause eyelashes.

  The plurality of warps 1a are arranged in parallel in the XY plane with a predetermined interval w1. The plurality of weft yarns 1b are arranged perpendicular to the warp yarn 1a in the XY plane, and are arranged in parallel at a predetermined interval w2. An opening 1c is formed in a space surrounded by two adjacent warps 1a and two adjacent wefts 1b. In the screen 紗 1, the interval w1 and the interval w2 are the same. However, the interval w1 and the interval w2 may be different.

  FIG. 2 is a cross-sectional view of the screen cage 1 shown in FIG. As shown in FIG. 2, the warp 1a has a diameter d1, and the weft 1b has a diameter d2. In the screen kite 1, the diameter d1 of the warp 1a is the same as the diameter d2 of the weft 1b. The diameter d1 of the warp 1a and the diameter d2 of the weft 1b may be different. Further, in the screen kite 1, the cross-sectional shapes (the cross-sectional shapes orthogonal to the longitudinal direction) of the warp 1a and the weft 1b are perfect circles, but the cross-sectional shapes of the warp 1a and the weft 1b may be oval.

  The diameter d1 of the warp 1a and the diameter d2 of the weft 1b can be appropriately selected in consideration of the thickness of the printed film, etc. In order to facilitate the printing of pattern lines arranged at high density, it is 45 μm or less. It is preferably 40 μm or less, more preferably 35 μm or less, and even more preferably 33 μm or less. When the diameter d1 of the warp 1a and the diameter d2 of the weft 1b are set to 35 μm or less, particularly 33 μm or less, it becomes easy to reliably print a print pattern arranged with a width of 150 μm, particularly 60 μm.

  The screen kite 1 has an intersecting portion where the warp 1a and the weft 1b overlap in the Z-axis direction, and a non-intersecting portion where the warp 1a and the weft 1b do not overlap in the Z-axis direction. The thickness t of the screen kite 1 is the thickness at the intersection where the warp 1a and the weft 1b overlap, and is the sum of the diameter d1 of the warp 1a and the diameter d2 of the weft 1b.

  The weaving density of the screen kite 1 is defined by the number of yarns (warp yarn 1a, weft yarn 1b) per inch of the screen kite 1 (hereinafter also referred to as “number of meshes”). In the screen kite 1 of this embodiment, the number of meshes of the warp 1a and the number of meshes of the weft 1b may be the same or different. From the viewpoint of suppressing variations in strength between the warp 1a and the weft 1b in the screen kite 1, the number of meshes of the warp 1a and the number of meshes of the weft 1b are preferably the same.

  If the diameters of the warp 1a and the weft 1b constituting the screen ridge 1 are the same, the strength of the screen ridge 1 increases as the number of meshes increases, but the aperture ratio described later decreases, and the ink passes through the opening 1c. It becomes difficult. If the ink does not easily pass through the opening 1c, the amount of ink transferred to the printing material is likely to be reduced, and the ink is difficult to spread uniformly on the printing material. Therefore, it becomes difficult to obtain a printed coating film having a uniform film thickness. On the other hand, when the number of meshes is lowered, the aperture ratio is increased, but the strength of the screen basket 1 is likely to be lowered. For this reason, there is a preferred range for the number of meshes of the screen 1. The preferred range of the number of meshes depends on the material, strength, diameter, etc. of the yarn (warp 1a, weft 1b) and cannot be determined uniquely. However, the process of stretching the screen 紗 1 on the plate frame or the screen 紗 1 From the viewpoint of obtaining sufficient strength that can suppress yarn breakage in the printing process, the number of meshes of the warp 1a and the weft 1b is preferably 200 mesh or more, particularly 250 mesh or more, and more preferably 300 mesh or more. Further, from the viewpoint of facilitating uniformizing the thickness of the printed coating film, the number of meshes of the warp 1a and the weft 1b is preferably 350 mesh or less, particularly 330 mesh or less.

The aperture ratio (%) is the ratio of the area of the opening 1c per predetermined area of the screen ridge 1 in the XY plane, and can be calculated using the following equation (1). In the following formula (1), w1 indicates the interval between two adjacent warps 1a, w2 indicates the interval between two adjacent wefts 1b, d1 indicates the diameter of the warp 1a, and d2 indicates the weft 1b. Indicates the diameter.
Aperture ratio (%) = (w1 × w2) / {(w1 + d1) × (w2 + d2)} × 100 (1)

The surface of the screen 1 has a ratio of surface free energy γs ^p derived from polar components to surface free energy γs derived from polar components and nonpolar components (hereinafter also referred to as “polar ratio”) of 15% or more and 70%. It is as follows. The surface free energy γs derived from the polar component and the nonpolar component (hereinafter also referred to as “γs”) is defined by the following formula (2), and the polar component with respect to the surface free energy γs derived from the polar component and the nonpolar component: The ratio (polarity ratio) of the surface free energy γs ^p derived from (hereinafter also referred to as “γs ^p ”) can be obtained by the following equation (3). Note that γs ^d is surface free energy derived from a nonpolar component (hereinafter also referred to as “γs ^d ”).
γs = γs ^d + γs ^p ---------------- (2)
Polarity ratio (%) = γs ^p / γs × 100 ------ (3)

Γs ^p and γs ^{d on} the surface of the screen ridge 1 can be calculated using the following equation (4). Specifically, the contact angles (θ) of the two types of measurement liquids are measured on the surface of the screen 1. Then, by fitting the two measured contact angles (θ) to the following equation (4) and solving the following two equations (4) fitting the contact angle (θ) as simultaneous equations, ^p and γs ^d can be calculated.

Note that the measurement liquid is γL (surface tension of the measurement liquid), γL ^d (surface free energy derived from the nonpolar component of the measurement liquid) and γL ^p (polarity of the measurement liquid) in the following formula (4) A liquid having a known surface free energy derived from a component can be used, for example, water or diiodomethane can be used. In addition, the contact angle (θ) of the surface of the screen 紗 1 is measured using a contact angle meter (manufactured by Kyowa Interface Science Co., Ltd., solid-liquid interface analyzer DropMaster) with 1 μL of the measurement liquid on the surface of the screen 紗 1. It can ask for.

(1 + cos θ) · γL / 4 = (γs ^d · γL ^d ) / (γs ^d + γL ^d ) + (γs ^p · γL ^p ) / (γs ^p + γL ^p ) ------------ ---- (4)
θ: Contact angle of the measurement liquid on the sample surface γL: Surface tension of the measurement liquid γL ^d : Surface free energy derived from the nonpolar component of the measurement liquid γL ^p : Surface free energy derived from the polar component of the measurement liquid γs ^d : surface free energy derived from non-polar components on the sample surface γs ^p : surface free energy derived from polar components on the sample surface

The surface free energy γs of the surface of the screen ridge 1 can be calculated by applying γs ^d and γs ^p calculated by the above equation (4) to the above equation (2). The polarity ratio of the surface of the screen ridge 1 can be calculated by applying γs ^p obtained by the above equation (4) and γs obtained by the above equation (2) to the above equation (3). In the present specification, the surface of the screen ridge 1 refers to the surface of the warp 1a or the weft 1b at the intersection or non-intersection.

  Even if the surface free energy γs of the surface of the screen ridge 1 is about the same, if the polarity ratio increases, the adhesion between the shielding film 20 having the surface polarity ratio within a predetermined range and the screen ridge 1 is likely to be improved. . The reason for this is not necessarily clear at present, but the contact efficiency with the shielding film 20 whose surface polarity ratio is within a predetermined range is increased by increasing the polarity ratio of the screen 1, so that the shielding film 20 and the screen It is considered that the adhesion with the heel 1 is improved.

  The polarity ratio of the surface of the screen kite 1 can be adjusted by the content of a compound having a polar group, which will be described later, which can be contained in the synthetic fiber constituting the warp 1a and the weft 1b. In order to improve the adhesion to the shielding film 20, the polarity ratio of the surface of the screen ridge 1 needs to be 15% or more and 70% or less. The polarity ratio of the surface of the screen ridge 1 is more preferably 20% or more and 70% or less, and further preferably 25% or more and 70% or less. On the other hand, the screen cage 1 having a surface polarity ratio of less than 15% cannot improve the adhesion with the shielding film 20. From the viewpoint of further improving the adhesion with the shielding film 20, the lower limit value of the polarity ratio on the surface of the screen ridge 1 is more preferably 20%, and further preferably 25%. Further, the screen ridge 1 having a surface polarity ratio exceeding 70% is more closely attached to the shielding film 20 than the screen ridge 1 of the present embodiment having a surface polarity ratio of 15% or more and 70% or less. The property does not improve further. Therefore, in consideration of a decrease in the strength of the screen ridge 1, the polarity ratio of the surface of the screen ridge 1 is preferably 70% or less.

  The synthetic fiber constituting the warp 1a and the weft 1b can contain a compound having a polar group (not shown). The state and shape of the compound having a polar group that can be contained in the synthetic fiber constituting the warp 1a and the weft 1b are not particularly limited and can be appropriately set by those skilled in the art. When it is contained in the raw material of the warp 1a and the weft 1b), it is preferably a solid. When the compound having a polar group is contained in the raw material of the synthetic fiber (warp 1a or weft 1b), foaming may occur if the compound having a polar group is a liquid. In addition, the compound which has a polar group may exist in a synthetic fiber, and may exist on the surface of a synthetic fiber.

  Although content of the compound which has a polar group is not specifically limited, those skilled in the art can set suitably, However, In the range of 0.01 mass% or more and 50 mass% or less with respect to the whole synthetic fiber (100 mass%). Preferably there is. By setting the content of the compound having a polar group to 0.01% by mass or more, the polarity ratio on the surface of the screen basket 1 can be easily increased as compared with the case where the content is outside the above range. Further, when the content of the compound having a polar group exceeds 50% by mass, the strength of the warp 1a and the weft 1b is likely to be reduced as compared with the case where the content is within the above range.

  In the present specification, the polar group refers to a functional group having polarity. Although it does not specifically limit as a compound which has a polar group, From an isocyanate group, a hydroxyl group, an amino group, a (meth) acryloyl group, an epoxy group, a thiol group, a carboxyl group, a sulfonic acid group, an acid anhydride modification group, and a cyano group Examples thereof include a compound having one or more polar groups selected from the group consisting of, a polyvinylpyrrolidone (PVP), and a quaternary ammonium salt-containing polymer. The warp 1a and the weft 1b may contain, for example, one or more compounds among these compounds.

  Examples of the compound having an isocyanate group include 2-isocyanatoethyl (meth) acrylate, 1,1-bis (acryloylmethyl) ethyl isocyanate, 2- (0- [1′-methylpropylideneamino] carboxyamino) ethyl methacrylate, 2-[(3,5-dimethylpyrazolyl) carbonylamino] ethyl methacrylate, methylenebis-4-cyclohexyl isocyanate, trimethylolpropane adduct of tolylene diisocyanate, trimethylolpropane adduct of hexamethylene diisocyanate, trimethylol of isophorone diisocyanate Polyisocyanates such as propane adduct, isocyanurate of tolylene diisocyanate, burette of hexamethylene isocyanate, and the above Block of cyanate, aromatic diisocyanates such as toluene 2,4-diisocyanate, toluene 2,6-diisocyanate, commercially available mixtures of toluene 2,4- and 2,6-diisocyanate (TDI), n-phenylene diisocyanate, 3,3'-diphenyl-4,4'-biphenylene diisocyanate, 4,4'-biphenylene diisocyanate, 4,4'-diphenylmethane diisocyanate, 2,4'-diphenylmethane diisocyanate, 3,3'-dichloro-4,4 ' -Biphenylene diisocyanate, cumene 2,4-diisocyanate, 1,5-naphthalene diisocyanate, p-xylylene diisocyanate, p-phenylene diisocyanate, 4-methoxy-1,3-phenylene diisocyanate, 4-chloro-1,3-phenylene diisocyanate 4-ethoxy-1,3-phenylene diisocyanate, 2,4-dimethylene-1,3-phenylene di- Socyanate, 5,6-dimethyl-1,3-phenylene diisocyanate, 2,4-diisocyanate diphenyl ether, aliphatic diisocyanates such as ethylene diisocyanate, ethylidene diisocyanate, propylene 1,2-diisocyanate, 1,6-hexamethylene Diisocyanate (HDI), 1,4-tetramethylene diisocyanate, 1,10-decamethylene diisocyanate, and alicyclic diisocyanates such as isophorone diisocyanate (IPDI), cyclohexylene 1,2-diisocyanate, cyclohexylene 1,4 -Diisocyanate and bis (4,4'-isocyanatocyclohexyl) methane. The polyisocyanates preferably have different reactivity of isocyanate groups. Among the polyisocyanates mentioned above, for example, toluene 2,4-diisocyanate, toluene 2,6-diisocyanate, 4′-diphenylmethane diisocyanate, cis- and trans- Isophorone diisocyanate is preferred.

  Examples of the compound having a hydroxyl group include polyethylene glycol (PEG) and propylene glycol (PG), triethanolamine, mannitol, sorbitol, glycerol, ethylene glycol, propylene glycol, butylene glycol, glycerin, pentaerythritol, sorbitol, diglycerin, polyvinyl Examples include alcohol (PVA), diethylene glycol, triethylene glycol, tetraethylene glycol, pentaethylene glycol, dipropylene glycol, tripropylene glycol, polyethylene oxide, polypropylene glycol, and polybutylene glycol.

  Examples of the compound having an amino group include aminopropyl vinyl ether, diethylaminoethyl vinyl ether, 2,4- or 2,6-tolylenediamine, xylylenediamine, and 4,4'-diphenylmethanediamine and other aromatic diamines, ethylenediamine, 1 , 2-propylenediamine, 2,2-dimethyl-1,3-propanediamine, 1,3-pentanediamine, 2-methyl-1,5-pentanediamine, 2-butyl-2-ethyl-1,5-pentane Aliphatic diamines such as diamine, 1,6-hexanediamine, 2,2,4- or 2,4,4-trimethylhexanediamine, 1,8-octanediamine, 1,9-nonanediamine and 1,10-decanediamine 1-amino-3-aminomethyl-3,5,5-trimethylcyclohexane (IP A), alicyclic diamines such as 4,4'-dicyclohexylmethanediamine (hydrogenated MDA), isopropylidenecyclohexyl-4,4'-diamine, 1,4-diaminocyclohexane and 1,3-bisaminomethylcyclohexane, etc. , Aminoethyl (meth) acrylate, propylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate, phenylaminoethyl (meth) acrylate, N-vinyldiethylamine, N-acetylvinylamine, (meth) acrylic Amine, N-methylacrylamine, (meth) acrylamide, N-methylacrylamide, p-aminostyrene, alkyl (C1-C12) amine (monomethylamine, monoethylamine, monobutylamine, dimethylamine, diethylamine and dibutylamine And poly (n = 2-6) alkylene (2-6 carbon atoms) poly (n = 3-7) amine (diethylenetriamine, dipropylenetriamine, dihexylenetriamine, triethylenetetramine, tetraethylenepentamine, penta Ethylenehexamine, hexaethyleneheptamine, etc.), methylamine, ethylamine, propylamine, butylamine, propylenediamine, hexamethylenediamine, diethylenetriamine, triethylenetetramine, ethanolamine, propanolamine, cyclohexylamine, aniline, toluidine, diaminodiphenylmethane, Primary amines having no tertiary amino group such as diaminodiphenylsulfone, dimethylamine, diethylamine, dipropylamine, dibutylamine, dipentylamine, Secondary amines having no tertiary amino group such as dihexylamine, dimethanolamine, diethanolamine, dipropanolamine, dicyclohexylamine, piperidine, piperazine, diphenylamine, phenylmethylamine, phenylethylamine, tris (2-aminoethyl) Amines having primary and tertiary amino groups such as amine and tris (3-aminopropyl) amine, 2-aminopyridine, 3-aminopyridine, 4-aminopyridine, 2,3-diaminopyridine, 2 , 6-diaminopyridine, 3,4-diaminopyridine, 3,5-diaminopyridine, pyridine-2,3,6-triamine, 2- (methylamino) pyridine, 4- (methylamino) pyridine, 2-methoxy- Primary amino group such as 6-methylaminopyridine, or 2 Aminopyridines having an amino group, 2-amino-3-picoline, 2-amino-4-picoline, 3-amino-4-picoline, 5-amino-2-picoline, 6-amino-2-picoline, 6- Aminopicolines such as amino-3-picoline, hydrazides such as phenylguanidine, acetylguanidine, hydrazide, etc., trimethylamine, triethylamine, benzyldimethylamine, N, N-dimethyl-ethylamine, N, N-dimethyl-butylamine, N, N-dimethyldecylamine, N, N-dimethyl-m-toluidine, N, N-dimethyl-p-toluidine, 2,6,10-trimethyl-2,6,10-triazaundecane, N, N ′ -Dimethylpiperazine, 1,4-diazabicyclo [2.2.2] octane, 1-azabicyclo [2.2. ] Octane-3-one, 1,8-diazabicyclo (5,4,0) -undecene-7, tertiary amines such as hexamethylenetetramine, 1-methylimidazole, 1,2-dimethylimidazole, 1-vinylimidazole , 1-allylimidazole, 2-methyl-1-vinylimidazole, imidazoles such as N-acetylimidazole, aromatics such as 4,4′-bis (dimethylamino) benzophenone, 4,4′-bis (diethylamino) benzophenone Tertiary amines, 2-dimethylaminopyridine, 4-dimethylaminopyridine, aminopyridines having a tertiary amino group such as 2- (N-methyl-2-pyridylamino) ethanol, trimethylenediamine, tetramethylenediamine, Pentamethylenediamine, hexamethylenediamine, trie Tylenetetramine, diethylenetriamine, triaminopropane, 2,2,4-trimethylhexamethylenediamine, 2,2,4-trimethylhexamethylenediamine, 2-hydroxyethylethylenediamine, hexamethylenediamine 2-hydroxyethylethylenediamine, N- (2 -Hydroxyethyl) propylenediamine, (2-hydroxyethylpropylene) diamine, (di-2-hydroxyethylethylene) diamine, (di-2-hydroxyethylpropylene) diamine, (2-hydroxypropylethylene) diamine, (di- 2-hydroxypropylethylene) diamine, aliphatic polyamines such as piperazine, alicyclic polyamines such as isophoronediamine, dicyclohexylmethane-4,4′-diamine, phenylenediamine, Lylenediamine, 2,4-tolylenediamine, 2,6-tolylenediamine, diethyltoluenediamine, 3,3'-dichloro-4,4'-diaminodiphenylmethane, 4,4'-bis- (sec-butyl) diphenylmethane And aromatic diamines such as sulfanilic acid and cysteic acid.

  As a compound having a (meth) acryloyl group, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, 2,3-dihydroxypropyl acrylate, 2,3-dihydroxy Examples include propyl methacrylate, tripropylene glycol methyl acrylate, tripropylene glycol methyl methacrylate, cyclohexyl acrylate, cyclohexyl methacrylate, trimethylolpropane monoformal acrylate, and glycerol monoformal acrylate.

  Compounds having an epoxy group include glycidyl vinyl ether, glycidyl carboxylic acid vinyl ester, glycidyl allyl ether, glycidyl (meth) acrylate, butyl glycidyl ether, pentyl glycidyl ether, hexyl glycidyl ether, heptyl glycidyl ether, octyl glycidyl ether, 2-ethylhexyl Monoglycidyl ethers such as glycidyl ether, nonyl glycidyl ether, decyl glycidyl ether, dodecyl glycidyl ether, tridecyl glycidyl ether, tetradecyl glycidyl ether, 1,4-butanediol diglycidyl ether, neopentyl glycol diglycidyl ether, 1, 6-hexanediol diglycidyl ether, diethylene glycol diglycidyl Tetraglycidyl ethers such as ether, triethylene glycol diglycidyl ether, diglycidyl ethers such as tripropylene glycol diglycidyl ether, triglycidyl ethers such as trimethylolethane triglycidyl ether, trimethylolpropane triglycidyl ether, and tetraglycidyl ethers such as pentaerythritol tetraglycidyl ether Glycidyl ethers, ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, glycerol polyglycidyl ether, diglycerol polyglycidyl ether, polyglycerol polyglycidyl ether, dihydroxyalkane polyglycidyl ether , Polyhide Alkoxy alkane polyglycidyl ether, sorbitol polyglycidyl ether.

  Examples of the compound having a thiol group include (meth) acrylic acid ester [1 mol adduct of hydroxyethyl acrylate ethylene ester, esterified product of triethylene glycol dimercaptan and acrylic acid, and 2 mol adduct of ethylene sulfide to acrylic acid. Etc.] 1,1,3,3-tetradecanethiol, 1,1,3,3-tetramethylbutane-1-thiol, 1,10-decanedithiol, 1,2-ethanedithiol, 1,3-propane Dithiol, 1,4-butanedithiol, 1,6-hexanedithiol, 1,9-nonanedithiol, 1-octanethiol, 1-decanethiol, 1-dodecanethiol, 1-butanethiol, 1-butanethiol copper (II ) Salt, 1-propanethiol, 1-hexadecanethiol, 1-hexa Thiol, 1-heptanethiol, 1-pentanethiol, 2-diethylaminoethanethiol hydrochloride, 2-butanethiol, 2-propanethiol, 2-propene-1-thiol, 2-methyl-1-propanethiol, 2-methyl 2-propanethiol, 2-methyl-2-propene-1-thiol, n-nonanethiol, t-tetradecanethiol, t-dodecanethiol, t-nonanethiol, t-hexadecanethiol, ethanethiol, glutathione, reduced form Glutathione, cysteamine hydrochloride, cysteamine sulfate, cysteine (L-cysteine, D-cysteine and mixtures thereof), cysteine derivatives (eg, N-acetyl-L-cysteine), cysteic acid, cysteic acid ethyl ester hydrochloride, dithio Erythritol Aliphatic compounds such as thioacetyl acid, thioglycolic acid, thioglycolate (for example, sodium thioglycolate), thiomalic acid, phenothiol, methyl mercaptan, mercaptoacetyl acid, mercaptoethanol, 1,2-benzenedithiol, 1, 3-benzenedithiol, 1,4-benzene-dimethanethiol, 2,5-dichlorobenzenethiol, 2-aminothiophenol, 2-naphthalenethiol, 2-bromothiophenol, 2-methoxybenzenethiol, 3,4- Dichlorobenzenethiol, 3-phenyl-1-propanethiol, 3-methoxybenzenethiol, 4-methoxy-α-toluenethiol, 4-methoxybenzenethiol, o-mercaptobenzoic acid, p-chlorophenylmethanethiol, p-si Alicyclic such as cyclohexylmethanethiol, p-methoxybenzyl-S- (4,6-dimethylpyridin-2-nyl) thiol carbonate, cyclohexylmethanethiol, cyclohexylmercaptan, triphenylmethanethiol, toluene-α-thiol Compound or aromatic compound, and 1-methyl-1,2,3,4-tetrazole-5-thiol, 2,5-dimercapto-1,3,4-thiadiazole, 2-amino-5-mercapto-1,3 , 4-thiazole, 2-amino-5-mercaptopyrazolo [3,4-d] pyrimidine, 2-furanmethanethiol, 2-methyl-1,3,4-thiazole-5-thiol, 2-mercaptothiazoline, 2-mercaptopyridine, 2-mercaptopyrimidine, 2-mercaptobenzoxyazo And heterocyclic compounds such as 2-mercaptobenzothiazole, 3-amino-1,2,4-triazole-5-thiol, 3-mercaptobenzimidazole, 6-mercaptobrin monohydrate, tetrathiafulvalene, etc. Can be mentioned.

  As the compound having a carboxyl group, (meth) acrylic acid, itaconic acid, fumaric acid, maleic acid, maleic anhydride, citraconic acid, undecylenic acid, crotonic acid, itaconic acid, formic acid, malonic acid, succinic acid, glutaric acid, Glycolic acid, propionic acid, butyric acid, valeric acid, caproic acid, enanthic acid, caprylic acid, pelargonic acid, capric acid, lactic acid, glyceric acid, tartronic acid, malic acid, tartaric acid, citric acid, adipic acid, acetic acid, propionic acid, Butanoic acid, pentanoic acid, hexanoic acid, heptanoic acid, 1,3-acetone dicarboxylic acid, 1,3-adamantane diacetic acid, 1,3-adamantane dicarboxylic acid, phenylmalonic acid, tetrabromoterephthalic acid, azelaic acid, benzylmalon Acid, biphenyl-4,4'-dicarboxylic acid, tetrafluoroiso Taric acid, 2,2′-bipyridine-4,4′-dicarboxylic acid, 2-bromoterephthalic acid, 1,2,3,4-butanetetracarboxylic acid, 5-tert-butylisophthalic acid, butylmalonic acid, chlorosuccinic acid Acid, 4,4′-sulfonyldibenzoic acid, tetrafluoroterephthalic acid, 3-thiophenmalonic acid, 1,1-cyclohexanediacetic acid, trans-1,2-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, terephthalic acid Acid, 1,2,3-triazole-4,5-dicarboxylic acid, bis (carboxymethyl) trithiocarbonate, 1,3,5-cyclohexanetricarboxylic acid, 1,4,8,11-tetraazacyclotetradecane- 1,4,8,11-tetraacetic acid, cis, cis-1,3,5-trimethylcyclohexane- , 3,5-tricarboxylic acid, cyclohexylsuccinic acid, trans-1,2-cyclopentanedicarboxylic acid, dibromomaleic acid, mesaconic acid, meso-2,3-dibromosuccinic acid, 4,5-dichlorophthalic acid, diethylmalon Acid, 2-methoxyisophthalic acid, 2-methoxyisophthalic acid, 6-methylpyridine-2,3-dicarboxylic acid, 3,4-dihydroxyhydrocinnamic acid, 2,5-dihydroxyterephthalic acid, 1,4-naphthalenedicarboxylic acid Acid, 2,6-naphthalenedicarboxylic acid, 4,4′-oxybis (benzoic acid), diphenic acid, docosanedioic acid, perfluoroglutaric acid, ethylmalonic acid, 3-fluorophthalic acid, 3-fluorophthalic acid, 5- Norbornenecarboxylic acid, trans-glutaconic acid, hexadecanedioic acid, 5- (octa Decyloxy) isophthalic acid, 3-phenylglutaric acid, 2,2'-iminodibenzoic acid, undecanedioic acid, 1,4-phenylenedipropionic acid and the like.

  Examples of the compound having a sulfonic acid group include paraffin (for example, carbon number 8-22) sulfonic acid, alkyl (for example, carbon number 8-12) benzenesulfonic acid, alkyl (for example, carbon number 8-12) benzenesulfonic acid formalin condensate. , Formalin condensate of cresol sulfonic acid, α-olefin (e.g. 8 to 16 carbon atoms) sulfonic acid, dialkyl (e.g. 8 to 12 carbon atoms) sulfosuccinic acid, lignin sulfonic acid, polyoxyethylene (mono or di) alkyl (e.g. C8-12) phenyl ether sulfonic acid, polyoxyethylene alkyl (for example, C8-18) ether sulfosuccinic acid half ester, naphthalenesulfonic acid, (mono or di) alkyl (for example, C1-6) naphthalenesulfonic acid Naphthalene sulfonic acid formal Condensate, (mono or di) alkyl (eg 1 to 6 carbons) formalin condensate of naphthalenesulfonic acid, creosote oil sulfonic acid formalin condensate, alkyl (eg 8 to 12 carbons) diphenyl ether disulfonic acid, polystyrene sulfone Acid, copolymer of styrene sulfonic acid and methacrylic acid, phenol sulfonic acid, cresol sulfonic acid, xylenol sulfonic acid, sulfanilic acid, vinyl sulfonic acid, allyl sulfonic acid, styrene sulfonic acid, acrylic acid-3-sulfonic acid propyl ester And cysteic acid.

  Examples of the compound having an acid anhydride modifying group include methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, t-butyl acrylate, cyclohexyl acrylate, benzyl acrylate, acrylate, methacrylic acid, and the like. Mention may be made of methacrylic acid esters such as methyl, ethyl methacrylate, propyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, t-butyl methacrylate, cyclohexyl methacrylate and benzyl methacrylate.

  Examples of the compound having a cyano group include acrylonitrile, methacrylonitrile, ethacrylonitrile, α-chloroacrylonitrile, α-fluoroacrylonitrile, vinylidene cyanide and the like.

  Examples of the quaternary ammonium salt-containing polymer include Taisei Fine Chemical Co., Ltd., Acryt (registered trademark) 8WX series, 1WX series, and the like.

  The polarity ratio on the surface of the screen ridge 1 is that the synthetic fiber (the warp 1a and the weft 1b) contains a compound having a polar group, with respect to the screen ridge 1, α rays, β rays, γ rays, electrons A method of irradiating a line under a predetermined condition (radiation irradiation method), a method of irradiating an ultraviolet ray under a predetermined condition (ultraviolet (UV) method), a method of irradiating a corona under a predetermined condition (corona discharge method), By the method (plasma method) of irradiating plasma generated by glow discharge under a predetermined condition, it can be within the predetermined range (15% or more and 70% or less). In addition, these methods may be used independently and can also be used in combination of 2 or more type.

  The manufacturing method of the screen basket 1 is not specifically limited. For example, a method of weaving synthetic fibers having a surface polarity ratio in the range of 15% to 70% as a warp 1a and a weft 1b in a predetermined woven composition, or a surface polarity ratio of 15% to 70%. Synthetic fibers outside the range are woven in a predetermined woven composition as warp 1a and weft 1b, and a compound having a polar group is imparted (for example, attached) to the obtained woven fabric, or α rays or β rays are added. Or by irradiating γ rays, electron beams, ultraviolet rays, corona, or plasma under predetermined conditions to make the polarity ratio of the surface of the screen 1 15% to 70%. Can do.

  Next, a method for manufacturing the screen plate 100 using the screen rod 1 will be described with reference to FIGS. FIG. 3 is a flowchart showing a procedure of each process when the screen plate 100 is manufactured, and FIGS. 4 to 8 are diagrams illustrating each process when the screen plate 100 is manufactured.

  In the process of step S100, as shown in FIG. 4, the screen ridge 1 is stretched on the plate frame 2 in a state where a predetermined tension is applied. The plate frame 2 is a rectangular frame and can be made of, for example, metal, casting, resin, or wood.

  A tensioner can be used to stretch the screen 1 on the plate frame 2. Specifically, each of the four sides of the screen rod 1 is clamped by a clamp of a tensioner, and this clamp is pulled using a mechanical type or air pressure to obtain a predetermined tension and a predetermined bias angle. The screen ridge 1 is fixed to the plate frame 2 in a state where a predetermined tension is applied. Thereafter, the screen ridge 1 is cut along the outer periphery of the plate frame 2. As predetermined | prescribed tension | tensile_strength applied to the screen rod 1, it can be set as the range of 21 N / cm-36 N / cm, for example. The bias angle refers to an acute angle among the angles formed by the warp 1a or the weft 1b and the plate frame 2.

  As a means for fixing the screen ridge 1 to the plate frame 2, an adhesive can be used. Examples of the adhesive include rubber-based, epoxy-based, urethane-based, and cyanoacrylate-based adhesives, but there is no particular limitation in the present embodiment, and the material for the screen ridge 1 and the material for the plate frame 2 are used. The selection may be made in consideration of the solvent contained in the ink 12. The ink 12 is not limited to a paint intended for coloring or color development, and can use raw materials for electronic parts for the purpose of forming electronic parts such as electrodes and dielectrics. can do.

  The predetermined tension applied to the screen ridge 1 is such that when the ink 12 filled in the opening 20a formed by the shielding film 20 and held by a part of the area of the screen ridge 1 is transferred to the substrate, the substrate This is an important factor for so-called plate separation, in which the screen ridge 1 that is in contact with the substrate is separated from the substrate. When the predetermined tension is small, the plate separation is not performed properly, the transfer of the ink 12 is non-uniform, and the printing film thickness varies, and the printing accuracy tends to be lowered. As the predetermined tension at which the plate separation is appropriately performed, 21 N / cm or more per unit width of the screen ridge 1 is required. Therefore, in each process of stretching the screen ridge 1 on the plate frame 2 and each printing step, the yarn breakage In addition, the breaking strength of the screen ridge 1 is preferably 40 N / cm or more so that the screen ridge 1 does not break. The breaking strength can be measured according to JIS L1096.

  In the process of step S101, as shown in FIG. 5, the resin film 10 is formed on the surface of the screen ridge 1 stretched on the plate frame 2. The resin film 10 constitutes the shielding film 20 through steps S102 to S104 described later. The upper surface 10d of the resin film 10 can be provided above the upper surface 1d of the screen ridge 1 in the Z-axis direction, and the lower surface 10e of the resin film 10 can be provided below the lower surface 1e of the screen ridge 1 in the Z-axis direction. it can. The resin film 10 provided on the lower surface 1e of the screen bottle 1 and the resin film 10 provided on the upper surface 1d of the screen bottle 1 may be connected through the opening 1c of the screen bottle 1. The upper surface 1d of the screen ridge 1 is filled with the opening 20a formed by the shielding film 20 in the surface of the screen ridge 1 and transfers the ink 12 held by a part of the area of the screen ridge 1 to the printed material. The lower surface 1d of the screen ridge 1 is filled in the opening 20a formed by the shielding film 20 in the surface of the screen ridge 1 so as to be a part of the screen ridge 1. This is a surface on which the printed material comes into contact when the ink 12 held by the area of the portion is transferred to the printed material.

  As the resin film 10, for example, a photosensitive resin (photoresist) that is cured by light irradiation can be used. As the photosensitive resin, diazo type, radical type, stilbazo type and the like can be used, and the photosensitive resin that can be used is not limited by the curing mechanism. Moreover, the photosensitive resin should just be able to form the resin film 10, and the form before formation of the resin film 10 is not limited. For example, it can be used in the form of liquid or solid (film). In the case of using a liquid photosensitive resin, for example, a resin film 10 is applied by a method in which a liquid photosensitive resin containing a solvent is applied to the upper surface 1d and the lower surface 1e of the screen 1 and dried to evaporate and remove the solvent. Can be formed. The thickness of the resin film 10 in the Z-axis direction can be adjusted by repeating application and drying.

  The thickness of the resin film 10 is preferably thin from the viewpoint of facilitating the formation of a thin printed film, but the shielding film 20 can be formed stably, the durability of the shielding film 20 can be maintained, and the shielding This can be determined in consideration of the fact that the sealing property for controlling the spread of the ink 12 filled in the opening 20a formed by the film 20 can be maintained. Since the resin film 10 having a small thickness has low strength, when the resin film 10 is removed by spraying water or air when forming the opening 20a, the region of the resin film 10 not covered by the mask 11 is also removed. There is a possibility. Moreover, in order to suppress bleeding of a predetermined printed pattern that has been printed, it is preferable that the shielding film 20 is thick. From such a viewpoint, the thickness of the resin film 10 is preferably 1 μm or more and 10 μm or less, more preferably 2 μm or more and 7 μm or less, and further preferably 3 μm or more and 5 μm or less. Note that the thickness of the shielding film 20 can be set to the thickness described above, as with the resin film 10. Here, the thickness of the resin film 10 (the shielding film 20) is a thickness that is added to the thickness t of the screen casing 1, and the thickness of the screen casing 1 including the resin film 10 (the shielding film 20). Is a value obtained by subtracting the thickness t of only the screen ridge 1 (in this embodiment, the total thickness of the resin film 10 (shielding film 20) formed on the upper surface 1d and the lower surface 1e). Moreover, the thickness of the resin film 10 (shielding film 20) formed on the upper surface 1d of the screen rod 1 can be set to, for example, 0 to 2 μm.

  In the screen ridge 1, the upper surface 10 d of the resin film 10 is provided above the upper surface 1 d of the screen ridge 1 in the Z-axis direction, and the lower surface 10 e of the resin film 10 is higher than the lower surface 1 e of the screen ridge 1 in the Z-axis direction. Although provided below, the upper surface 10d of the resin film 10 does not have to be provided above the upper surface 1d of the screen cage 1. From the viewpoint of improving the adhesion with the shielding film 20 and improving the durability of the shielding film 20, the resin film 10 has an upper surface 10d provided above the upper surface 1d and a lower surface 10e as shown in FIG. It is preferable to be provided below the lower surface 1e.

  As the photosensitive resin described above, a type using a diazo resin as a cross-linking agent, a type using polyvinyl alcohol (PVA) added with styrylpyridinium (SBQ), or a type using a polymerization cross-linking reaction of an acryloyl group or an acrylamide group. A photosensitive resin can be used. These photosensitive resins can be used alone or in combination of two or more.

  In the process of step S102, as shown in FIG. 6, a mask 11 having a shape corresponding to a predetermined print pattern is attached to the upper surface 10d of the resin film 10. As the mask 11, a film or glass can be used.

  In the process of step S103, as shown in FIG. 7, the irradiated portion is cured by irradiating ultraviolet rays onto the resin film 10 to which the mask 11 is attached from above the screen ridge 1. The ultraviolet light may be visible light.

  In the process of step S104, the resin film 10 irradiated with ultraviolet rays is developed, and the mask 11 and the region of the resin film 10 covered with the mask 11 are removed as shown in FIG. By removing the region of the resin film 10 covered with the mask 11, an opening 20a having a shape corresponding to a predetermined printing pattern is formed. Further, the shielding film 20 is constituted by the remaining resin film 10. When the screen printing is performed, the shielding film 20 covers a region other than a region where a print pattern is formed on the printing material.

  By the processing of these steps S100 to S104, the screen plate 100 can be manufactured as shown in FIGS. Screen printing can be performed by filling the opening 20a with the ink 12 and transferring the ink 12 held by a partial region of the screen basket 1 to the substrate. 8 and 9 show a state where one of the five openings 20a formed in the shielding film 20 is filled with the ink 12.

  In the above-described processing of step S102 to step S104, the region of the resin film 10 covered with the mask 11 is removed to form the opening 20a. However, the type of the resin film 10 and the type of the developer are changed. Thus, the region of the resin film 10 covered with the mask 11 is left, and the region of the resin film 10 not covered with the mask 11 can be removed to form the opening 20a.

  Further, in the process of step S102 described above, the mask 11 is attached to the upper surface 10d of the resin film 10, but the mask 11 may be attached to the lower surface 10e of the resin film 10. When the mask 11 is affixed to the lower surface 10e of the resin film 10, in the process of step S103, the resin film 10 to which the mask 11 is affixed can be irradiated with ultraviolet rays from below the screen cage 1.

  Here, the polarity ratio of the surface of the shielding film 20 formed on the screen ridge 1 is 10% or more and 50% or less. When the polarity ratio of the surface of the shielding film 20 is 10% or more and 50% or less, the adhesion between the screen basket 1 and the shielding film 20 is improved. On the other hand, when the polarity ratio of the surface of the shielding film 20 is less than 10% or exceeds 50%, the adhesion with the screen ridge 1 cannot be improved. Further, when the polarity ratio of the surface of the shielding film 20 is more than 60%, the physical properties of the shielding film 20 are likely to change, and for example, the components contained in the shielding film 20 are likely to be eluted into the ink 12.

  The polarity ratio of the surface of the shielding film 20 is within the above range (10% or more) by adjusting the type of the material constituting the shielding film 20 or adjusting the content ratio of the material constituting the shielding film 20. 50% or less). In addition, for example, the shielding film 20 may be set within the above range by irradiating α rays, β rays, γ rays, electron beams, ultraviolet rays, corona, or plasma under predetermined conditions. it can.

  As described above, in the screen plate 100 of the present embodiment, the surface polarity ratio is within a predetermined range (10%) on the screen ridge 1 in which the surface polarity ratio is within a predetermined range (15% or more and 70% or less). % Or more and 50% or less), the adhesion between the screen ridge 1 and the shielding film 20 is improved. From the viewpoint of further improving the adhesion between the screen ridge 1 and the shielding film 20, the polarity ratio of the surface of the screen ridge 1 is larger than the polarity ratio of the surface of the shielding film 20, that is, the screen with respect to the polarity ratio of the surface of the shielding film 20 It is preferable that the ratio of the polarity ratio on the surface of 紗 1 (the polarity ratio of the surface of the screen 紗 1 / the polarity ratio of the surface of the shielding film 20) exceeds 1. The upper limit of the ratio of the polarity ratio of the surface of the screen 1 to the polarity ratio of the surface of the shielding film 20 is not particularly limited, but can be, for example, 6 or less.

  Next, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to only these examples.

Example 1
The synthetic fiber monofilament has a core portion made of polyarylate (liquid crystal polyester), and a sheath portion made of thermoplastic polymer as a component of the sea portion and polyarylate (liquid crystal polyester) as a component of the island portion. A 23 μm core-sheath composite fiber (manufactured by Kuraray Co., Ltd., product name Vecry) was prepared. This synthetic fiber was woven into a plain weave with a density of 330 mesh as warp 1a and weft 1b to obtain a screen kite 1.

  The produced screen 1 was sent to a corona discharge treatment apparatus in which the output of the discharge terminal was set to 3 kW at a speed of 12 m / min, and was continuously subjected to corona discharge treatment. Thereafter, the four sides of the screen ridge 1 were clamped by a tensioner clamp and stretched on a 320 mm × 320 mm aluminum plate frame 2. Here, the tension at the center of the screen 1 was 1.0 mm (28 N / cm) as measured using a tension gauge STG-75B (manufactured by Sun Giken). The bias angles of the warp 1a and the weft 1b were both 22.5 degrees.

  A diazo photosensitive resin (product name: AX-81, manufactured by Oji Tac Co., Ltd.) was applied to the screen ridge 1 stretched on the plate frame 2 using a bucket, and the applied photosensitive resin was dried. The application and drying of the photosensitive resin were repeated to form a resin film 10 having a thickness of about 10 μm. Thereafter, a mask 11 is attached to the upper surface 10d of the resin film 10, and exposure and development are performed to form an opening 20a, and 200 shielding films 20 of 0.3 mm × 0.3 mm (dimension in the XY plane) are formed. Formed. The obtained screen plate 100 was used as the screen plate of Example 1.

(Example 2)
Example 1 except that the shielding film 20 was formed on the screen 1 used in Example 1 using SBQ photosensitive resin (product name: OnePot) instead of diazo photosensitive resin. A screen plate 100 of Example 2 was obtained in the same manner as described above.

(Example 3)
As a synthetic fiber monofilament, a fiber made of nylon and having a diameter of 30 μm was prepared. Using this synthetic fiber as warp 1a and weft 1b, both warp 1a and weft 1b were woven into a plain weave at a density of 305 mesh to obtain screen kite 1. The obtained screen basket 1 was subjected to corona discharge treatment in the same manner as in Example 1. A screen plate 100 of Example 3 was obtained in the same manner as in Example 1 except that the screen rod 1 was replaced with the plate frame 2 instead of the screen rod 1 used in Example 1.

Example 4
The synthetic fiber monofilament used in Example 1 was used as the warp 1a and the weft 1b, and both the warp 1a and the weft 1b were woven into a plain weave at a density of 380 mesh to obtain a screen kite 1. The resulting screen 1 was plasma treated at an output of 1 W for 1 minute. A screen plate 100 of Example 4 was obtained in the same manner as in Example 1 except that the screen rod 1 was stretched on the plate frame 2 in place of the screen rod 1 used in Example 1.

(Comparative Example 1)
A screen plate 100 of Comparative Example 1 was obtained in the same manner as in Example 1 except that the screen rod 1 used in Example 1 was not subjected to corona discharge treatment.

(Comparative Example 2)
A screen plate 100 of Comparative Example 2 was obtained in the same manner as in Example 3 except that the screen rod 1 used in Example 3 was not subjected to corona discharge treatment.

(Comparative Example 3)
Instead of the plasma treatment performed on the screen 1 used in Example 4, the screen plate 100 of Comparative Example 3 was prepared in the same manner as in Example 4 except that the plasma treatment was performed at an output of 0.2 W for 1 minute. Obtained.

(Comparative Example 4)
Except that the shielding film 20 was formed on the screen 1 used in Example 1 by using a radical polymerization photosensitive resin (manufactured by Kurita Chemical Laboratory, product name: WR250) instead of the diazo photosensitive resin. A screen plate 100 of Comparative Example 4 was obtained in the same manner as in Example 1.

(Polarity ratio)
About each screen plate 100 of an Example and a comparative example, 1 microliter of water and diiodomethane are dripped at each of the screen ridge 1 surface and the shielding film 20 surface, respectively, and each contact angle of the liquid for measurement (water and diiodomethane) is set to contact angle. It was measured using a meter (manufactured by Kyowa Interface Science Co., Ltd., automatic minimum contact angle meter MCA-3). The measured contact angles are respectively applied to the following equation (5), and the surface free energy γs ^p derived from the polar component and the surface free energy γs ^d derived from the nonpolar component for each of the surface of the screen ridge 1 and the surface of the shielding film 20. Was calculated.
(1 + cos θ) · γL / 4 = (γs ^d · γL ^d ) / (γs ^d + γL ^d ) + (γs ^p · γL ^p ) / (γs ^p + γL ^p ) ------------ --- (5)
θ: Contact angle of the measurement liquid on the sample surface γL: Surface tension of the measurement liquid γL ^d : Surface free energy derived from the nonpolar component of the measurement liquid γL ^p : Surface free energy derived from the polar component of the measurement liquid γs ^d : surface free energy derived from a non-polar component on the sample surface γs ^p : surface free energy derived from a polar component on the sample surface, and calculated γs ^d and γs ^p , and the above equations (2) and (3), The polarity ratio was calculated for each of the surface of screen 1 and the surface of shielding film 20.

(Shielding film peeling test)
About the screen plate 100 of an Example and a comparative example, the mending tape (Sumitomo 3M Co., Ltd. 810-3-24) was stuck on the surface of the shielding film 20, and 200 shielding films 20 and the tape were made to adhere by a fixed load. . Thereafter, the screen plate 100 was fixed, the tape was pulled in the direction perpendicular to the screen ridge 1 (Z-axis direction), and the tape was peeled off from the shielding film 20. The number of (the peeled shielding film 20) of the shielding film 20 attached to the tape was counted, and the adhesion between the screen ridge 1 and the shielding film 20 was judged. As a method for bringing the shielding film 20 and the tape into close contact with each other with a constant load, an exposure machine (FL-2S) manufactured by USHIO LIGHTING was used, and a method in which the shield film 20 and the tape were brought into vacuum contact with a load of 40 mmHg for 1 minute was used.

  Table 1 shows the polarity ratio between the surface of the screen ridge 1 and the surface of the shielding film 20 and the result of the shielding film peeling test in the screen plate 100 of the example and the comparative example.

  As shown in Table 1, the polarity ratio of the surface of the screen 1 is in the range of 15% to 70%, and the polarity ratio of the surface of the shielding film 20 is in the range of 10% to 50%. In the screen plates 100 of Examples 1 to 4, the shielding film 20 did not peel at all. On the other hand, although the polarity ratio of the surface of the shielding film 20 is in the range of 10% or more and 50% or less, the polarity ratio of the surface of the screen 1 is outside the range of 15% or more and 70% or less. The screen plate 100 had 66 or more shielding films 20 peeled off. Further, the screen plate of Comparative Example 4 in which the polarity ratio of the surface of the screen 1 is within the range of 15% or more and 70% or less, but the polarity ratio of the surface of the shielding film 20 is outside the range of 10% or more and 50% or less. As for 100, as many as 78 shielding films 20 were peeled off. From these results, it was understood that the screen plate 100 of this embodiment has improved adhesion between the screen ridge 1 and the shielding film 20.

Claims (5)

Plate frame,
A screen rod made of synthetic fiber, stretched on the plate frame;
A shielding film for forming an opening having a shape corresponding to a predetermined printing pattern, formed on the screen ridge,
The surface of the screen ridge has a ratio of the surface free energy derived from the polar component to the surface free energy derived from the polar component and the nonpolar component of 15% or more and 70% or less,
The screen plate, wherein the surface of the shielding film has a ratio of the surface free energy derived from the polar component to the surface free energy derived from the polar component and the nonpolar component of 10% or more and 50% or less.   The screen plate according to claim 1, wherein the synthetic fiber includes at least a liquid crystal polymer.   The screen plate according to claim 1, wherein the synthetic fiber is a monofilament.   The screen plate according to any one of claims 1 to 3, wherein the shielding film is a film formed using a photosensitive resin. The surface free energy derived from the polar component with respect to the surface free energy derived from the polar component and the nonpolar component is higher on the surface of the screen ridge than the surface of the shielding film. The screen version as described in any one of.