JP7093625B2 - Screen version - Google Patents

Description

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

Conventionally, screen printing has been used for manufacturing electronic component boards such as printed circuits, IC circuits, and various display devices, and electrodes such as solar cells. Electronic component boards and electrodes have become smaller and smaller in recent years, and screen printing manufactured by printing these is required to print fine print patterns with high dimensional accuracy.

Generally, a plate used for screen printing has a plate frame and a screen gauze stretched on the plate frame with a predetermined tension applied, and forms a shielding film on one or both sides of the screen gauze. , It is used for screen printing by forming an opening at a position corresponding to a predetermined printing pattern. To form the opening and the shielding film, a photosensitive resin solution (emulsion) is applied to one or both sides of the screen gauze and dried or a photosensitive resin film is adhered to form a resin film, and a part of this resin film is formed. The area is covered with a mask having a shape corresponding to a predetermined printing pattern, and the resin film in which a part of the area is covered with the mask is irradiated with visible light and / or ultraviolet rays, and the soluble area of the resin film is covered with water and chemicals. It is performed by removing it with a shielding film or the like to form an opening with a shielding film. The soluble region of the resin film differs depending on the reaction of the resin film (photosensitive resin) generated by irradiation with visible light or ultraviolet light, and when the reaction of the resin film is a photobridge reaction, the visible light or ultraviolet light When the region of the resin film that has not been irradiated (the region covered with the mask) becomes a soluble region and the reaction of the resin film is a photodecomposition reaction, the region of the resin film that has been irradiated with visible light or ultraviolet rays. The region (the region not covered by the mask) is the soluble region.

Here, if the adhesion between the shielding film and the screen gauze is weak, the shielding film may be peeled off from the screen gauze due to repeated printing. For this reason, a screen plate having a weak adhesion between the shielding film and the screen gauze may not be able to repeatedly print a precise printing 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 gauze to improve the adhesion between the shielding film made of a photosensitive resin and the screen gauze. Techniques to enhance have been proposed.

Japanese Unexamined Patent Publication No. 2011-218673

However, since the DLC film is formed in a high temperature atmosphere of 150 to 250 degrees Celsius, when the screen gauze is composed of fibers, the fibers constituting the screen gauze may be thermally shrunk at the stage of forming the DLC film. There are problems such as a decrease in the strength of the screen gauze. In particular, when synthetic fibers are used as the fibers constituting the screen gauze, the heat shrinkage of the fibers and the decrease in the strength of the screen gauze become remarkable. Therefore, the technique disclosed in Patent Document 1 is a screen gauze composed of synthetic fibers. There is a problem that it is difficult to apply to.

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

The gist of the present invention is as follows.
[1] Plate frame and
A screen gauze made of synthetic fibers, which is stretched on the plate frame,
It has a shielding film formed on the screen gauze for providing an opening having a shape corresponding to a predetermined printing pattern.
On the surface of the screen gauze, 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 15% or more and 70% or less.
The surface of the shielding film 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.
[2] The screen version according to [1], wherein the synthetic fiber contains at least a liquid crystal polymer.
[3] The screen version according to [1] or [2], wherein the synthetic fiber is a monofilament.
[4] The screen version according to any one of [1] to [3], wherein the shielding film is a film formed by using a photosensitive resin.
[5] The surface of the screen gauze is 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 higher than that of the surface of the shielding film [1]. ] To the screen version described in any one of [4].

According to the present invention, it is possible to provide a screen plate using synthetic fibers and having improved adhesion between a screen gauze and a shielding film.

It is a schematic diagram which shows the screen gauze. It is a partial cross-sectional view of a screen gauze. It is a flowchart which shows the procedure of each process at the time of manufacturing a screen plate. It is a figure explaining the process (screen covering process) at the time of manufacturing a screen plate. It is a figure explaining the process (resin film forming process) at the time of manufacturing a screen plate. It is a figure explaining the process (mask pasting process) at the time of manufacturing a screen plate. It is a figure explaining the process (ultraviolet irradiation process) at the time of manufacturing a screen plate. It is a figure explaining the process (development process) at the time of manufacturing a screen plate. It is a schematic diagram which shows the screen version.

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

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

The screen gauze 1 is one of the members constituting the screen plate 100 used for screen printing, and is a woven fabric for holding ink and transferring the held ink to a printed matter. As shown in FIG. 1, the screen gauze 1 is composed of a plurality of warp threads 1a and a plurality of weft threads 1b composed of synthetic fibers.

Examples of the synthetic fibers constituting the warp 1a and the weft 1b include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), polyesters such as liquid crystal polyester, nylon, and polyphenyl sulfone (PPS). , Synthetic fibers formed from polyether ether ketone (PEEK) and synthetic fibers in which two or more kinds thereof are combined can be used, and among these, synthetic fibers formed from nylon or polyester are preferably used. In addition, synthetic fibers formed from liquid crystal polymers such as liquid crystal polyester have elasticity and are excellent in dimensional stability. Therefore, when synthetic fibers containing a liquid crystal polymer are used as the warp 1a and the weft 1b, the warp 1a and the weft 1b are less likely to be deformed even if screen printing is repeated. Therefore, synthetic fibers containing liquid crystal polymers are particularly preferred because they are suitable for the formation of repeated precise print patterns. When the warp 1a and the weft 1b are composed of two or more kinds of materials, it is obtained by mixing core-sheath type fibers in which the material of the core portion and the material of the sheath portion of the cross section are different, or two or more kinds of melted materials. Blend-type fibers, core-sheath fibers that are obtained by melting and mixing two or more types of materials as materials for cores and sheaths, and multiple islands and islands that extend in the longitudinal direction of the fibers. The material of the sea portion surrounding the portion may be different, such as sea-island type fiber. Further, it may be a core-sheath type composite fiber in which an island portion and a sea portion are formed in a sheath portion or a core portion. The printed pattern is a pattern (including figures, characters, lines, etc.) formed by the printed coating film transferred to the printed matter, and the liquid crystal polymer is a polymer that exhibits liquid crystallinity in a molten state or a solution state. Is.

The warp 1a and the weft 1b constituting the screen gauze 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, it is preferable that both the warp 1a and the warp 1b are monofilaments. The monofilament may be composed of a single material, or may be composed of two or more kinds of materials having different characteristics. Further, the ratio of the surface free energy γ ^sp (hereinafter, also referred to as “polarity ratio”) derived from the polar component to the surface free energy γ s derived from the polar component and the non-polar component on the surface of the screen gauze 1 is 15% or more and 70%. The surfaces of the warp threads 1a and the weft threads 1b may be coated with an organic substance or an inorganic substance and modified as long as they are not outside the following range.

As shown in FIG. 1, the plurality of warp threads 1a and the plurality of weft threads 1b are woven by alternately rising and falling in the Z-axis direction, and constitute a plain weave weave composition. In the screen gauze 1, the weaving structure is not particularly limited, and a twill weave, a satin weave, or the like can be used. However, from the viewpoint of making the thickness of the screen gauze 1 thin in the Z-axis direction and making it difficult for the screen gauze 1 to be woven, the weave structure of the screen gauze 1 is preferably plain weave.

The plurality of warp threads 1a are arranged in parallel with a predetermined interval w1 on the XY plane. The plurality of wefts 1b are arranged perpendicularly to the warp 1a in the XY plane and are arranged in parallel with a predetermined interval w2. An opening 1c is formed in a space surrounded by two adjacent warp threads 1a and two adjacent weft threads 1b. In the screen sheath 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 taken along the line AA of the screen gauze 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 sheath 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 warp 1b may be different. Further, in the screen gauze 1, the cross-sectional shapes of the warp 1a and the warp 1b (the shape of the cross section orthogonal to the longitudinal direction) are perfect circles, but the cross-sectional shapes of the warp 1a and the warp 1b may be elliptical.

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

The screen gauze 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 gauze 1 is the thickness at the intersection where the warp 1a and the weft 1b overlap, and is the total of the diameter d1 of the warp 1a and the diameter d2 of the warp 1b.

The weaving density of the screen gauze 1 is defined by the number of threads (warp threads 1a, weft threads 1b) per inch of the screen gauze 1 (hereinafter, also referred to as “mesh number”). In the screen gauze 1 of the present 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 the strengths of the warp 1a and the weft 1b in the screen sheath 1, it is preferable that the number of meshes of the warp 1a and the number of meshes of the weft 1b are the same.

If the diameters of the warp 1a and the weft 1b constituting the screen gauze 1 are the same, the strength of the screen gauze 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. When it becomes difficult for the ink to pass through the opening 1c, the amount of ink transferred to the printed matter tends to decrease, and it becomes difficult for the ink to spread uniformly on the printed matter. 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 low, the aperture ratio is high, but the strength of the screen gauze 1 tends to be low. Therefore, the number of meshes of the screen gauze 1 has a preferable range. The preferable range of the number of meshes depends on the material, strength, diameter, etc. of the threads (warp threads 1a, weft threads 1b) and cannot be uniquely determined. From the viewpoint of sufficient strength to suppress yarn breakage in the printing process using the warp and weft, the number of meshes of the warp 1a and the warp 1b is preferably 200 mesh or more, particularly 250 mesh or more, and more preferably 300 mesh or more. Further, from the viewpoint of making it easy to make the film thickness of the printed coating film uniform, it is preferable that the number of meshes of the warp 1a and the warp 1b is 350 mesh or less, particularly 330 mesh or less.

The aperture ratio (%) is the ratio of the area of the opening 1c to the predetermined area of the screen gauze 1 on the XY plane, and can be calculated by using the following equation (1). In the following equation (1), w1 indicates the distance between two adjacent warp threads 1a, w2 indicates the distance between two adjacent warp and weft threads 1b, d1 indicates the diameter of the warp and weft 1a, and d2 indicates the weft thread 1b. Indicates the diameter of.
Aperture ratio (%) = (w1 x w2) / {(w1 + d1) x (w2 + d2)} x 100 ---- (1)

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

The γ ^sp and γ s ^d on the surface of the screen gauze 1 can be calculated by using the following equation (4). Specifically, the contact angles (θ) of the two types of measuring liquids are measured on the surface of the screen gauze 1. Then, by applying the two measured contact angles (θ) to the following equation (4) and solving the two following equations (4) to which the contact angle (θ) is applied as simultaneous equations, γs on the surface of the screen gauze 1 ^p and γ s ^d can be calculated.

The liquids for measurement are γL (surface tension of the liquid for measurement), γL ^d (surface free energy derived from the non-polar component of the liquid for measurement) and γL ^p (polarity of the liquid for measurement) in the following equation (4). A liquid whose surface free energy derived from the component) is known can be used, and for example, water or diiodomethane can be used. The contact angle (θ) on the surface of the screen gauze 1 shall be measured by measuring 1 μL of the liquid for measurement on the surface of the screen gauze 1 using a contact angle meter (DropMaster, a solid-liquid interface analyzer manufactured by Kyowa Interface Science Co., Ltd.). Can be obtained by.

(1 ＋ cosθ) ・ γL / 4 ＝ (γs ^d・ γL ^d ) / (γs ^d ＋ γL ^d ) ＋ (γs ^p・ γL ^p ) / (γs ^p + γL ^p ) ------------ ---- (4)
θ: Contact angle of the liquid for measurement on the sample surface γL: Surface tension of the liquid for measurement γL ^d : Surface free energy derived from the non-polar component of the liquid for measurement γL ^p : Surface free energy derived from the polar component of the liquid for measurement γ s ^d : Surface free energy derived from the non-polar component of the sample surface γ s ^p : Surface free energy derived from the polar component of the sample surface

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

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

The polar ratio of the surface of the screen gauze 1 can be adjusted by the content of a compound having a polar group described later, which can be contained in the synthetic fibers 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 gauze 1 needs to be 15% or more and 70% or less. The polarity ratio of the surface of the screen gauze 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 gauze 1 having a surface polarity ratio of less than 15% cannot improve the adhesion to the shielding film 20. From the viewpoint of further improving the adhesion to the shielding film 20, the lower limit of the polarity ratio of the surface of the screen gauze 1 is more preferably 20%, further preferably 25%. Further, the screen gauze 1 having a surface polarity ratio of more than 70% adheres to the shielding film 20 as compared with the screen gauze 1 of the present embodiment having a surface polarity ratio of 15% or more and 70% or less. The sex does not improve further. Therefore, the polarity ratio of the surface of the screen gauze 1 is preferably 70% or less in consideration of a decrease in the strength of the screen gauze 1.

The synthetic fibers constituting the warp 1a and the warp 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 warp 1b is not particularly limited and can be appropriately set by those skilled in the art. When it is contained in the raw materials of the warp 1a and the weft 1b), it is preferably solid. When a compound having a polar group is contained in a raw material of a synthetic fiber (warp and weft 1b), if the compound having a polar group is a liquid, foaming or the like may occur. The compound having a polar group may be present in the synthetic fiber or may be present on the surface of the synthetic fiber.

The content of the compound having a polar group is not particularly limited and can be appropriately set by those skilled in the art, but is in the range of 0.01% by mass or more and 50% by mass or less with respect to the entire synthetic fiber (100% by mass). It is preferable to have. By setting the content of the compound having a polar group to 0.01% by mass or more, it becomes easy to increase the polar ratio of the surface of the screen gauze 1 as compared with the case where it 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 and weft 1b tends to decrease as compared with the case where the content is within the above range.

As used herein, the polar group refers to a functional group having polarity. The compound having a polar group is not particularly limited, but includes an isocyanate group, a hydroxyl group, an amino group, a (meth) acloyl group, an epoxy group, a thiol group, a carboxyl group, a sulfonic acid group, an acid anhydride-modifying group and a cyano group. Examples thereof include compounds having one or more polar groups selected from the above group, polyvinylpyrrolidone (PVP), and quaternary ammonium salt-containing polymers. The warp 1a and the warp 1b may contain, for example, one or more of these compounds.

Examples of the compound having an isocyanate group include 2-isocyanate ethyl (meth) acrylate, 1,1-bis (acryloylmethyl) ethyl isocyanate, 2- (0- [1'-methylpropyridenamino] carboxyamino) ethyl methacrylate, and the like. 2-[(3,5-dimethylpyrazolyl) carbonylamino] ethyl methacrylate, methylenebis-4-cyclohexylisocyanate, trimethylolpropaneadduct of tolylene diisocyanate, trimethylolpropaneadduct of hexamethylenediisocyanate, trimethylol of isophorone diisocyanate Polyisocyanates such as propaneadducts, isocyanurates of tolylene diisocyanate, and burettes of hexamethylene isocyanate, and blocks of the above isocyanates, aromatic diisocyanates such as toluene 2,4-diisocyanate, toluene 2,6- Diisocyanate, a mixture of commercially available toluene 2,4- and 2,6-diisocyanate (TDI), n-phenylenedi isocyanate, 3,3'-diphenyl-4,4'-biphenylenediocyanate, 4,4'-biphenylenedi isocyanate, 4 , 4'-diphenylmethane diisocyanate, 2,4'-diphenylmethane diisocyanate, 3,3'-dichloro-4,4'-biphenylenediisocyanate, cumene 2,4-diisocyanate, 1,5-naphthalindiisocyanate, p-xylylene diisocyanate, p-phenylenedi isocyanate, 4-methoxy-1,3-phenylenediisocyanate, 4-chloro-1,3-phenylenediisocyanate, 4-ethoxy-1,3-phenylenediisocyanate, 2,4-dimethylene-1,3-phenylenediisocyanate , 5,6-dimethyl-1,3-phenylenediisocyanate, 2,4-diisocyanatodiphenyl ether, aliphatic diisocyanates, for example, ethylene diisocyanate, etylidene 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- Isocyanate G and bis (4,4'-isocyanate cyclohexyl) methane and the like can be mentioned. The polyisocyanate preferably has different reactivity of isocyanate groups, and among the above-mentioned polyisocyanates, for example, toluene 2,4-diisocyanate, toluene 2,6-diisocyanate, 4'-diphenylmethane diisocyanate, cis- and trans- It is preferably isophorone diisocyanate.

Compounds 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, and polyvinyl. Examples thereof include alcohol (PVA), diethylene glycol, triethylene glycol, tetraethylene glycol, pentaethylene glycol, dipropylene glycol, tripropylene glycol, polyethylene oxide, polypropylene glycol, polybutylene glycol and the like.

Examples of the compound having an amino group include aminoprovir vinyl ether, diethylaminoethyl vinyl ether, 2,4- or 2,6-tolylene diamine, xylylene diamine and aromatic diamines such as 4,4'-diphenylmethanediamine, 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 diamines, 1,6-hexanediamines, 2,2,4- or 2,4,4-trimethylhexanediamines, 1,8-octanediamines, 1,9-nonanediamines and 1,10-decanediamines. , 1-Amino-3-aminomethyl-3,5,5-trimethylcyclohexane (IPDA), 4,4'-dicyclohexylmethanediamine (hydrogenated MDA), isopropyridenecyclohexyl-4,4'-diamine, 1,4 -Alicyclic diamines such as diaminocyclohexane and 1,3-bisaminomethylcyclohexane, aminoethyl (meth) acrylate, propylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate, (meth) acrylic acid. Phenylaminoethyl, N-vinyldiethylamine, N-acetylvinylamine, (meth) acrylicamine, N-methylacrylicamine, (meth) acrylamide, N-methylacrylamide, p-aminostyrene, alkyl (1-12 carbon atoms) Amines (monomethylamine, monoethylamine, monobutylamine, dimethylamine, diethylamine, dibutylamine, etc.) and poly (n = 2-6) alkylene (2-6 carbon atoms) poly (n = 3-7) amines (diethylenetriamine, diethylenetriamine, diethylene) Methylamine, ethylamine, propylamine, butylamine, propylenediamine, hexamethylenediamine, diethylenetriamine, triethylenetetramine, etc., such as propylenetriamine, dihexylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine and hexaethyleneheptamine). , Ethanolamine, propanolamine, cyclohexylamine, aniline, toluidine, diaminodiphenylmethane, diaminodiphenylsulfone and other primary amines without tertiary amino groups, dimethylamine, diethylamine, dipropylamine, dibutylamine, dipentylamine, Tris (2-aminoethyl), secondary amines that do not have a tertiary amino group, such as dihexylamine, dimethanolamine, diethanolamine, dipropanolamine, dicyclohexylamine, piperidine, piperazine, diphenylamine, phenylmethylamine, and phenylethylamine. Amines, amines having primary and tertiary amino groups such as amines and tris (3-aminopropyl) amines, 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- Aminopyridines having a primary amino group such as 6-methylaminopyridine or a secondary amino group, 2-amino-3-picolin, 2-amino-4-picolin, 3-amino-4-picolin, 5-amino Aminopicolins such as -2-picolin, 6-amino-2-picolin, 6-amino-3-picolin, 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-triazaundecan, N, N'-dimethylpiperazine, 1,4-diazabicyclo [2.2.2] octane, 1-azabicyclo [2.2.2] octane-3-one, 1 , 8-Diazabicyclo (5,4,0) -Undecene-7, tertiary amines such as hexamethylenetetramine, 1-methylimidazole, 1,2-dimethylimidazole, 1-vinyl imidazole, 1-allyl imidazole, 2- Imidazoles such as methyl-1-vinylimidazole and N-acetylimidazole, aromatic tertiary amines such as 4,4'-bis (dimethylamino) benzophenone, 4,4'-bis (diethylamino) benzophenone, 2-dimethyl Aminopyridines having a tertiary amino group such as aminopyridine, 4-dimethylaminopyridine, 2- (N-methyl-2-pyridylamino) ethanol, trimethylenediamine, tetramethylenediamine, pentamethylenediamine, hexamethylenediamine, etc. Trie Tylenetetramine, diethylenetriamine, triaminopropane, 2,2,4-trimethylhexamethylenediamine, 2,2,4-trimethylhexamethylenediamine, 2-hydroxyethylethylenediamine, hexamethylenediamine2-hydroxyethylethylenediamine, N- (2) -Hydroxyethyl) propylene diamine, (2-hydroxyethylpropylene) diamine, (di-2-hydroxyethylethylene) diamine, (di-2-hydroxyethylpropylene) diamine, (2-hydroxypropylethylene) diamine, (di- 2-Hydroxypropylethylene) Diamines, aliphatic polyamines such as piperazine, alicyclic polyamines such as isophoronediamine, dicyclohexylmethane-4,4'-diamine, phenylenediamine, xylylenediamine, 2,4-tolylene diamine, 2 , 6-Tolylenidamine, diethyltoluenediamine, 3,3'-dichloro-4,4'-diaminodiphenylmethane, 4,4'-bis- (sec-butyl) aromatic diamines such as diphenylmethane, sulfanic acid, cysteine acid And so on.

Examples of the compound having a (meth) acloyl group include 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, 2,3-dihydroxypropyl acrylate, and 2,3-dihydroxy. Examples thereof include propyl methacrylate, tripropylene glycol methyl acrylate, tripropylene glycol methyl methacrylate, cyclohexyl acrylate, cyclohexyl methacrylate, trimethylol propane monoformal acrylate, and glycerol monoformal acrylate.

Examples of the compound 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, and 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, Diglycidyl ethers such as 6-hexanediol diglycidyl ether, diethylene glycol diglycidyl ether, triethylene glycol diglycidyl ether, tripropylene glycol diglycidyl ether, triglycidyl such as trimethylol ethane triglycidyl ether and trimethylol propane triglycidyl ether. Ethers, tetraglycidyl ethers such as pentaerythritol tetraglycidyl ether, ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, glycerol polyglycidyl ether, diglycerol polyglycidyl ether, Examples thereof include polyglycerol polyglycidyl ether, dihydroxyalkane polyglycidyl ether, polyhydroxyalcan polyglycidyl ether, and sorbitol polyglycidyl ether.

Examples of the compound having a thiol group include (meth) acrylic acid ester [1 mol addition of ethylene sfide of hydroxyethyl acrylate, esterified product of triethylene glycol dimercaptan and acrylic acid, and 2 mol addition of ethylene sulfide to acrylic acid. Etc.], etc., 1,1,3,3-tetradecanethiol, 1,1,3,3-tetramethylbutane-1-thiol, 1,10-decandithiol, 1,2-ethanedithiol, 1,3-propane Dithiol, 1,4-butanedithiol, 1,6-hexanedithiol, 1,9-nonandithiol, 1-octanethiol, 1-decanethiol, 1-dodecanethiol, 1-butanethiol, 1-butanethiol copper (II) ) Salt, 1-propanethiol, 1-hexadecanethiol, 1-hexanethiol, 1-heptanethiol, 1-pentanethiol, 2-diethylaminoethanethiol hydrochloride, 2-butanethiol, 2-propanethiol, 2-propen- 1-thiol, 2-methyl-1-propanethiol, 2-methyl-2-propanethiol, 2-methyl-2-propen-1-thiol, n-nonanthiol, t-tetradecanethiol, t-dodecanethiol, t -Nonanthiol, t-hexadecanethiol, ethanethiol, glutathione, reduced glutathione, systemamine hydrochloride, systemamine sulfate, cysteine (L-cysteine, D-cysteine and mixtures thereof), cysteine derivatives (eg, N-acetyl- L-cysteine), cysteine acid, cysteine acid ethyl ester hydrochloride, dithioerythritol, thioacetyl acid, thioglycolic acid, thioglycolate (eg, sodium thioglycolate), thioapple acid, phenothiol, methyl mercaptan, mercaptoacetyl acid. , Aliphatic compounds such as mercaptoethanol, 1,2-benzenedithiol, 1,3-benzenedithiol, 1,4-benzene-dimethanethiol, 2,5-dichlorobenzenethiol, 2-aminothiophenol, 2-naphthalene Thiol, 2-bromothiophenol, 2-methoxybenzene thiol, 3,4-dichlorobenzene thiol, 3-phenyl-1-propane thiol, 3-methoxybenzene thiol, 4-methoxy-α-toluene thiol, 4-methoxybenzene Thiol, o-mercapto benzoic acid, p-chlorophenylmethanethiol, p-si Aromatic formulas such as clohexylmethanethiol, p-methoxybenzyl-S- (4,6-dimethylpyridine-2-nyl) thiol carbanate, cyclohexylmethanethiol, cyclohexylmercaptan, triphenylmethanethiol, toluene-α-thiol, etc. Compounds or aromatic compounds, and 1-methyl-1,2,3,4-tetrazole-5-thiol, 2,5-dimercapto-1,3,4-thiadiazole, 2-amino-5-mercapto-1,3 , 4-Tidiazole, 2-Amino-5-Mercaptopyrazolo [3,4-d] pyrimidin, 2-Franmethanethiol, 2-Methyl-1,3,4-Thiazole-5-thiol, 2-Mercaptothiazole, 2-mercaptopyridine, 2-mercaptopyrimidine, 2-mercaptobenzoxiazole, 2-mercaptobenzothiazole, 3-amino-1,2,4-triazole-5-thiol, 3-mercaptobenzimidazole, 6-mercaptobrinmono Examples thereof include hydrates and heterocyclic compounds such as tetrathiafluvalene.

Examples of the compound having a carboxyl group include (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, and glutaric acid. Glycolic acid, propionic acid, butyric acid, valeric acid, caproic acid, enanthic acid, capric acid, pelargonic acid, capric acid, lactic acid, glyceric acid, tartron acid, malic acid, tartaric acid, citric acid, adipic acid, acetic acid, propionic acid, Butanoic acid, pentanoic acid, hexanoic acid, heptanic acid, 1,3-acetone dicarboxylic acid, 1,3-adamantandiacetic acid, 1,3-adamantandicarboxylic acid, phenylmalonic acid, tetrabromoterephthalic acid, azelaic acid, benzylmalon Acid, biphenyl-4,4'-dicarboxylic acid, tetrafluoroisophthalic 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, 4,4'-sulfonyldibenzoic acid, tetrafluoroterephthalic acid, 3-thiophenalonic acid, 1,1-cyclohexanedioacetic acid, trans-1,2 -Cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, terephthalic 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-1,3,5-tricarboxylic acid, cyclohexylsuccinic acid , Trans-1,2-cyclopentanedicarboxylic acid, dibromomaleic acid, mesaconic acid, meso-2,3-dibromosuccinic acid, 4,5-dichlorophthalic acid, diethylmalonic acid, 2-methoxyisophthalic acid, 2-methoxy Isophthalic acid, 6-methylpyridine-2,3-dicarboxylic acid, 3,4-dihydroxyhydrosilicate dermal acid, 2,5-dihydroxyterephthalic acid, 1,4-naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, 4 , 4'-oxybis (benzoic acid), diphenylic acid, docosandioic acid, perfluoroglutaric acid, ethylmalonic acid, 3-fluorophthalic acid, 3-fluorophthalic acid, 5-norbornenecarboxylic acid, trans-glutaconic acid, hexadecanedi Acid, 5- (octa Decyloxy) Isophthalic acid, 3-phenylglutaric acid, 2,2'-iminodibenzoic acid, undecanedioic acid, 1,4-phenylenedipropionic acid and the like can be mentioned.

Examples of the compound having a sulfonic acid group include paramarin (for example, 8 to 22 carbon atoms) sulfonic acid, alkyl (for example, 8 to 12 carbon atoms) benzene sulfonic acid, and alkyl (for example, 8 to 12 carbon atoms) benzene sulfonic acid formalin condensate. , Formalin condensate of cresol sulfonic acid, α-olefin (eg 8-16 carbon) sulfonic acid, dialkyl (eg 8-12 carbon) sulfosuccinic acid, lignin sulfonic acid, polyoxyethylene (mono or di) alkyl (eg mono or di) alkyl 8-12) phenyl ether sulfonic acid, polyoxyethylene alkyl (eg 8-18 carbon) ether sulfosuccinic acid half ester, naphthalene sulfonic acid, (mono or di) alkyl (eg 1-6 carbon) naphthalene sulfonic acid , Formalin Condensate of Naphthalene Sulfonic Acid, (Mono or Di) Alkyl (eg, 1 to 6 carbon atoms), Formalin Condensate of Naphthalene Sulfonic Acid, Formalin Condensate of Cleosoto Oil Sulfonic Acid, Alkyl (eg, 8 to 12 carbon atoms) Diphenyl ether disulfonic acid, polystyrene sulfonic acid, copolymer of styrene sulfonic acid and methacrylic acid, phenol sulfonic acid, cresol sulfonic acid, xylenol sulfonic acid, sulfanic acid, vinyl sulfonic acid, allyl sulfonic acid, styrol sulfonic acid, acrylic acid- Examples thereof include 3-sulfonic acid propyl ester and cysteine acid.

Examples of the compound having an acid anhydride modifying group include acrylic acid esters such as methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, t-butyl acrylate, cyclohexyl acrylate, and benzyl acrylate, and methacrylic acid. Examples thereof include 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, etacrylonitrile, α-chloroacrylonitrile, α-fluoroacrylonitrile, vinylidene cyanide and the like.

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

The polar ratio of the surface of the screen gauze 1 is such that the synthetic fibers (warp 1a and weft 1b) contain a compound having a polar group, and that the screen gauze 1 contains α-rays, β-rays, γ-rays, and 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), and the like. By a method of irradiating the plasma generated by the glow discharge under predetermined conditions (plasma method), the temperature can be kept within the above-mentioned predetermined range (15% or more and 70% or less). These methods may be used alone or in combination of two or more.

The method for manufacturing the screen gauze 1 is not particularly limited. For example, a method of weaving synthetic fibers having a surface polarity ratio in the range of 15% or more and 70% or less into a predetermined weaving composition as warp and weft 1b, or a method of weaving a surface polarity ratio of 15% or more and 70% or less. Synthetic fibers outside the range are woven into a predetermined weaving composition as warp 1a and warp 1b, and a compound having a polar group is added (for example, adhered) to the obtained woven fabric, or α-rays or β-rays are applied. It is manufactured by a method such as irradiating γ-rays, electron beams, ultraviolet rays, corona, or plasma under predetermined conditions to make the polarity ratio of the surface of the screen gauze 1 15% or more and 70% or less. Can be done.

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

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

A gauze machine can be used to stretch the screen gauze 1 on the plate frame 2. Specifically, the parts of the screen gauze 1 in the four side directions are clamped by the clamps of the gauze machine, and the clamps are pulled by mechanical or air pressure to obtain a predetermined tension and a predetermined bias angle. The screen gauze 1 is fixed to the plate frame 2 with a predetermined tension applied. After that, the screen gauze 1 is cut along the outer circumference of the plate frame 2. The predetermined tension applied to the screen gauze 1 can be, for example, in the range of 21 N / cm to 36 N / cm. The bias angle refers to the angle formed by the warp 1a or the weft 1b and the plate frame 2 on the acute angle side.

An adhesive can be used as a means for fixing the screen gauze 1 to the plate frame 2. Examples of the adhesive include rubber-based, epoxy-based, urethane-based, and cyanoacrylate-based adhesives, but the present embodiment is not particularly limited, and the material of the screen gauze 1 and the material of 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 the paint for the purpose of coloring and coloring, and the raw material for the electronic parts for the purpose of forming electronic parts such as electrodes and dielectrics can be used, for example, in the form of a liquid or a paste. can do.

A predetermined tension applied to the screen gauze 1 is applied to the printed matter when the ink 12 filled in the opening 20a formed by the shielding film 20 and held by a part of the screen gauze 1 is transferred to the printed matter. It is an important factor for so-called plate separation, in which the screen gauze 1 in contact with the printed matter separates from the printed matter. If the predetermined tension is small, the plate separation is not properly performed, the transfer of the ink 12 becomes non-uniform, the film thickness of the printing coating film varies, and the printing accuracy tends to decrease. Since a predetermined tension for properly separating the plates is required to be 21 N / cm or more per unit width of the screen gauze 1, thread breakage is required in each step of stretching the screen gauze 1 on the plate frame 2 and printing. The breaking strength of the screen gauze 1 is preferably 40 N / cm or more so that the screen gauze 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 gauze 1 stretched on the plate frame 2. The resin film 10 constitutes the shielding film 20 through the steps of steps S102 to S104 described later. The upper surface 10d of the resin film 10 may be provided above the upper surface 1d of the screen gauze 1 in the Z-axis direction, and the lower surface 10e of the resin film 10 may be provided below the lower surface 1e of the screen gauze 1 in the Z-axis direction. can. The resin film 10 provided on the lower surface 1e of the screen gauze 1 and the resin film 10 provided on the upper surface 1d of the screen gauze 1 may be connected to each other through the opening 1c of the screen gauze 1. When the upper surface 1d of the screen gauze 1 is filled with the opening 20a formed by the shielding film 20 in the surface of the screen gauze 1 and the ink 12 held by a part of the screen gauze 1 is transferred to the printed matter. The lower surface 1d of the screen gauze 1 is filled in the opening 20a formed by the shielding film 20 on the surface of the screen gauze 1 to be one of the screen gauze 1. This is the surface that the printed matter comes into contact with when the ink 12 held by the area of the portion is transferred to the printed matter.

As the resin film 10, for example, a photosensitive resin (photoresist) that is cured by irradiation with light can be used. As the photosensitive resin, a diazo type, a radical type, a still basso type or the like can be used, and the photosensitive resin that can be used is not limited by the curing mechanism. Further, the photosensitive resin is not limited as long as it can form the resin film 10, and the form before the formation of the resin film 10 is not limited. For example, it can be used in the form of a liquid or a solid (film). When a liquid photosensitive resin is used, for example, a liquid photosensitive resin containing a solvent is applied to the upper surface 1d and the lower surface 1e of the screen sheath 1, and the resin film 10 is 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 coating and drying.

The thickness of the resin film 10 is preferably thin from the viewpoint of facilitating the formation of a thin-film printed coating film, but the shielding film 20 can be stably formed, the durability of the shielding film 20 can be maintained, and the shielding film 20 can be shielded. It can be determined in consideration of the fact that the sealing property that controls the spread of the ink 12 filled in the opening 20a formed by the film 20 can be maintained. Since the thin resin film 10 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. Further, in order to suppress bleeding of a predetermined printed pattern, the thickness of the shielding film 20 is preferably 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. The thickness of the shielding film 20 can be the same as that of the resin film 10 as described above. Here, the thickness of the resin film 10 (shielding film 20) is a thickness added to the thickness t of the screen gauze 1, and is the thickness of the screen gauze 1 including the resin film 10 (shielding film 20). It means a value obtained by subtracting the thickness t of only the screen gauze 1 from the above (in the present embodiment, the total thickness of the resin film 10 (shielding film 20) formed on the upper surface 1d and the lower surface 1e). Further, the thickness of the resin film 10 (shielding film 20) formed on the upper surface 1d of the screen gauze 1 can be, for example, 0 to 2 μm.

In the screen gauze 1, the upper surface 10d of the resin film 10 is provided above the upper surface 1d of the screen gauze 1 in the Z-axis direction, and the lower surface 10e of the resin film 10 is in the Z-axis direction with respect to the lower surface 1e of the screen gauze 1. Although it is provided below, the upper surface 10d of the resin film 10 may not be provided above the upper surface 1d of the screen gauze 1. From the viewpoint of improving the adhesion to the shielding film 20 and improving the durability of the shielding film 20, as shown in FIG. 5, the upper surface 10d of the resin film 10 is provided above the upper surface 1d, and the lower surface 10e is provided. It is preferably provided below the lower surface 1e.

The above-mentioned photosensitive resin includes a type using a diazo resin as a cross-linking agent, a type using polyvinyl alcohol (PVA) to which styrylpyridinium (SBQ) is added, and 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 resin film 10 to which the mask 11 is attached is irradiated with ultraviolet rays from above the screen gauze 1 to cure the irradiated portion. The ultraviolet light may be visible light.

In the process of step S104, the resin film 10 irradiated with ultraviolet rays is developed, and as shown in FIG. 8, the mask 11 and the region of the resin film 10 covered with the mask 11 are removed. By removing the region of the resin film 10 covered with the mask 11, an opening 20a having a shape corresponding to a predetermined print pattern is formed. Further, the shielding film 20 is formed by the remaining resin film 10. When screen printing is performed, the shielding film 20 covers an area other than the area forming a print pattern in the printed matter.

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

In the processes of steps S102 to S104 described above, the region of the resin film 10 covered with the mask 11 is removed to form the opening 20a, but the type of the resin film 10 and the type of the developer are changed. Thereby, the region of the resin film 10 covered with the mask 11 can be 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 attached to the lower surface 10e of the resin film 10, in the process of step S103, ultraviolet rays can be applied to the resin film 10 to which the mask 11 is attached from below the screen gauze 1.

Here, the surface of the shielding film 20 formed on the screen gauze 1 has a polarity ratio of 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 gauze 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 more than 50%, the adhesion to the screen gauze 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. It can be 50% or less). Further, for example, the shielding film 20 may be within the above range by irradiating the shielding film 20 with α rays, β rays, γ rays, electron beams, ultraviolet rays, corona, or plasma under predetermined conditions. can.

As described above, in the screen plate 100 of the present embodiment, the surface polarity ratio of the screen plate 1 is within a predetermined range (15% or more and 70% or less), and the surface polarity ratio is within a predetermined range (10). Since the shielding film 20 is formed in (% or more and 50% or less), the adhesion between the screen gauze 1 and the shielding film 20 is improved. From the viewpoint of further improving the adhesion between the screen gauze 1 and the shielding film 20, the polarity ratio of the surface of the screen gauze 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 of the surface of the gauze 1 (the polarity ratio of the surface of the screen gauze 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 gauze 1 to the polarity ratio of the surface of the shielding film 20 is not particularly limited, but may be, for example, 6 or less.

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

(Example 1)
The diameter of the synthetic fiber monofilament consists of a core part made of polyarylate (liquid polyester) and a sheath part made of thermoplastic polymer as a component of the sea part and polyarylate (liquid polyester) as a component of the island part. A 23 μm core-sheath type composite fiber (manufactured by Kuraray Co., Ltd., product name Polymer) was prepared. These synthetic fibers were used as warp 1a and warp 1b, and both the warp 1a and the warp 1b were woven into a plain weave at a density of 330 mesh to obtain a screen gauze 1.

The produced screen gauze 1 was sent to a corona discharge processing device in which the output of the discharge terminal was set to 3 kW at a speed of 12 m / min, and the corona discharge treatment was continuously performed. After that, the parts of the screen gauze 1 in the four side directions were sandwiched by the clamps of the gauze machine and stretched on a 320 mm × 320 mm aluminum plate frame 2. Here, the tension at the central portion of the screen gauze 1 was 1.0 mm (28 N / cm) as measured by using a tension gauge STG-75B (manufactured by Sun Giken Co., Ltd.). The bias angles of the warp 1a and the weft 1b were both 22.5 degrees.

A diazo-based photosensitive resin (manufactured by Oji Tac Co., Ltd., product name: AX-81) was applied to the screen gauze 1 stretched on the plate frame 2 using a bucket, and the applied photosensitive resin was dried. The photosensitive resin was repeatedly applied and dried to form a resin film 10 having a thickness of about 10 μm. After that, the mask 11 is attached to the upper surface 10d of the resin film 10 and exposed and developed to form an opening 20a, and 200 shielding films 20 having a size of 0.3 mm × 0.3 mm (dimensions 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 screen gauze 1 used in Example 1 was formed with a shielding film 20 using an SBQ-based photosensitive resin (manufactured by Murakami Co., Ltd., product name: OnePot) instead of the diazo-based photosensitive resin. The screen version 100 of Example 2 was obtained in the same manner as in the above method.

(Example 3)
As a synthetic fiber monofilament, a fiber having a diameter of 30 μm made of nylon was prepared. These synthetic fibers were used as warp 1a and warp 1b, and both the warp 1a and the warp 1b were woven into a plain weave at a density of 305 mesh to obtain a screen gauze 1. The obtained screen gauze 1 was subjected to a corona discharge treatment in the same manner as in Example 1. The screen plate 100 of Example 3 was obtained in the same manner as in Example 1 except that the screen gauze 1 was stretched on the plate frame 2 in place of the screen gauze 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 warp 1b were woven into a plain weave at a density of 380 mesh to obtain a screen gauze 1. The obtained screen gauze 1 was plasma-treated at an output of 1 W for 1 minute. The screen plate 100 of Example 4 was obtained in the same manner as in Example 1 except that the screen gauze 1 was stretched on the plate frame 2 in place of the screen gauze 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 gauze 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 gauze 1 used in Example 3 was not subjected to corona discharge treatment.

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

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

(Polarity ratio)
For each of the screen plates 100 of Examples and Comparative Examples, 1 μL of water and diiodomethane were dropped on each of the surface of the screen gauze 1 and the surface of the shielding film 20, and the contact angles of the measuring liquids (water and diiodomethane) were set to the contact angles. The measurement was performed using a meter (automatic microcontact angle meter MCA-3 manufactured by Kyowa Interface Science Co., Ltd.). The measured contact angles are applied to the following equations (5), respectively, and the surface free energy γ ^sp derived from the polar component and the surface free energy γ s ^d derived from the non-polar component are applied to the surface of the screen gauze 1 and the surface of the shielding film 20 respectively. Was calculated.
(1 ＋ cosθ) ・ γL / 4 ＝ (γs ^d・ γL ^d ) / (γs ^d ＋ γL ^d ) ＋ (γs ^p・ γL ^p ) / (γs ^p + γL ^p ) ------------ --- (5)
θ: Contact angle of the liquid for measurement on the sample surface γL: Surface tension of the liquid for measurement γL ^d : Surface free energy derived from the non-polar component of the liquid for measurement γL ^p : Surface free energy derived from the polar component of the liquid for measurement γs ^d : Surface free energy derived from the non-polar component of the sample surface γs ^p : Surface free energy derived from the polar component of the sample surface Based on the calculated γs ^d and γs ^p , and the above equations (2) and (3). The polarity ratio was calculated for each of the surface of the screen gauze 1 and the surface of the shielding film 20.

(Shielding film peeling test)
For the screen plates 100 of Examples and Comparative Examples, a mending tape (810-3-24 manufactured by Sumitomo 3M Ltd.) was attached to the surface of the shielding film 20, and 200 shielding films 20 and the tape were brought into close contact with each other with a constant load. .. Then, the screen plate 100 was fixed, the tape was pulled in the direction perpendicular to the screen gauze 1 (Z-axis direction), and the tape was peeled off from the shielding film 20. The number of the shielding films 20 (peeled shielding films 20) adhering to the tape was counted, and the adhesion between the screen gauze 1 and the shielding film 20 was determined. As a method of bringing the shielding film 20 and the tape into close contact with each other with a constant load, a method of vacuum contacting the shielding film 20 with a load of 40 mmHg for 1 minute was used using an exposure machine manufactured by Ushio Lighting (FL-2S).

Table 1 shows the polar ratios of the surface of the screen gauze 1 and the surface of the shielding film 20 and the results of the shielding film peeling test in the screen plates 100 of Examples and Comparative Examples.

As shown in Table 1, the polarity ratio of the surface of the screen gauze 1 is within the range of 15% or more and 70% or less, and the polarity ratio of the surface of the shielding film 20 is within the range of 10% or more and 50% or less. In the screen plates 100 of Examples 1 to 4, the shielding film 20 did not peel off at all. On the other hand, in Comparative Examples 1 to 3 in which the polarity ratio of the surface of the shielding film 20 is within the range of 10% or more and 50% or less, but the polarity ratio of the surface of the screen gauze 1 is outside the range of 15% or more and 70% or less. In the screen plate 100, more than 66 shielding films 20 were peeled off. Further, the screen version of Comparative Example 4 in which the polarity ratio of the surface of the screen gauze 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. In 100, as many as 78 shielding films 20 were peeled off. From these results, it was understood that the screen plate 100 of the present embodiment has improved adhesion between the screen gauze 1 and the shielding film 20.

Claims (3)

With the plate frame,
A screen gauze made of synthetic fibers, which is stretched on the plate frame,
It has a shielding film formed on the screen gauze for providing an opening having a shape corresponding to a predetermined printing pattern.
On the surface of the screen gauze, 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 15% or more and 70% or less.
On the surface of the shielding film, 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.
The surface of the screen gauze has a higher 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 than the surface of the shielding film.
The screen plate is characterized in that the shielding film is a film formed using only a photosensitive resin . The screen plate according to claim 1, wherein the synthetic fiber contains at least a liquid crystal polymer. The screen version according to claim 1 or 2, wherein the synthetic fiber is a monofilament.

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