WO2010087455A1 - スクリーン印刷用メッシュ部材 - Google Patents
スクリーン印刷用メッシュ部材 Download PDFInfo
- Publication number
- WO2010087455A1 WO2010087455A1 PCT/JP2010/051280 JP2010051280W WO2010087455A1 WO 2010087455 A1 WO2010087455 A1 WO 2010087455A1 JP 2010051280 W JP2010051280 W JP 2010051280W WO 2010087455 A1 WO2010087455 A1 WO 2010087455A1
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- WIPO (PCT)
- Prior art keywords
- mesh member
- thickness
- mesh
- printing
- metal foil
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N1/00—Printing plates or foils; Materials therefor
- B41N1/24—Stencils; Stencil materials; Carriers therefor
- B41N1/247—Meshes, gauzes, woven or similar screen materials; Preparation thereof, e.g. by plasma treatment
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
- H05K3/12—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N1/00—Printing plates or foils; Materials therefor
- B41N1/24—Stencils; Stencil materials; Carriers therefor
Definitions
- the present invention relates to a mesh member used for screen printing, and more particularly, to a mesh member for screen printing used for realizing high-definition screen printing with a thin printed film thickness.
- FIG. 1 is a partially enlarged explanatory view of a printing plate usually used for screen printing.
- a mesh member made by knitting fine wires 1 made of metal or polyester is stretched on a screen frame (not shown), and then coated with resin 4 (photosensitive emulsion) on the entire surface, and then masked. Covered. Then, the photosensitive emulsion 4 is cured by exposing only the portion not to be printed, and the printing emulsion 5 is prepared by removing the photosensitive emulsion 4 at the portion to be printed.
- symbol 2 shows the opening part (mesh opening part) of a mesh member in the figure.
- the mesh member for screen printing is used to keep the photosensitive emulsion 4 flat and to reinforce the strength of the photosensitive emulsion 4. Since such a mesh member is generally produced by knitting a fine wire 1 made of metal or polyester with a machine, the presence of uneven portions on the surface is unavoidable. For this reason, the photosensitive emulsion 4 fixed to the mesh member is also not flat because it has uneven portions on the surface, and the squeegee 6 is easily caught, so that it is difficult to uniformly stretch the paste 7.
- the photosensitive emulsion 4 when the photosensitive emulsion 4 is applied and exposed, the surface of the fine wire 1 is exposed to light and the reflection direction is changed, so that the photosensitive emulsion 4 of the pattern portion which is not originally cured is cured and the printed pattern portion
- the width may be non-uniform.
- Patent Document 1 proposes a mesh member (metal mesh fabric) produced by knitting ultrafine wires made of austenitic stainless steel having a wire diameter of less than 10 to 21 ⁇ m.
- the thickness of the intersecting portion of the strands is twice the diameter of the thin wires, so that a mesh member having a thickness of less than 20 ⁇ m cannot be obtained.
- Patent Document 2 proposes a technique for reducing the thickness of the mesh member by flattening the intersecting portion of the metal mesh fabric by rolling and chamfering at least a part of the rolled flat portion by polishing or the like. ing. According to this technique, it is shown that the thickness of the mesh member is reduced to 21.8 ⁇ m by polishing a mesh member having a thin wire diameter of 18.8 ⁇ m and a thickness of 24.5 ⁇ m after rolling (See Patent Document 2 and Examples). However, with such a technique, the metal fine wire is also reduced in diameter by polishing (wire diameter after polishing: 18.2 ⁇ m). If the thickness of the mesh is reduced by further polishing, the strength of the mesh member becomes insufficient, and the screen frame becomes insufficient. There is a risk that you will not be able to stretch. In addition, when the polishing is not uniform, the diameter reduction due to polishing proceeds excessively, and a portion with low strength is formed, so that the mesh member may be broken.
- Patent Document 3 proposes a method of producing a mesh member for screen printing by depositing nickel in a mesh shape by electroforming (electrolytic deposition).
- a mesh member manufactured by electroforming hereinafter, sometimes referred to as “electroformed mesh” is a mesh member that can be applied to high-precision screen printing with a thin print film thickness as follows. Have a serious problem.
- electroforming method by applying a voltage in an electrolytic solution (electrolytic bath) containing a metal such as nickel, positively charged metal ions move to the anode electrode, and the transferred metal ions are deposited (electrodeposited) to form a metal. A film is formed.
- electrolytic solution electrolytic bath
- electroformed films having different thicknesses can be obtained by adjusting the voltage and time.
- the substrate on which the electrode-side metal is deposited is a flat plate, a metal foil can be obtained, but various shapes of electroformed products can be obtained by electroforming using a substrate (matrix) having a desired shape. it can.
- the line portion and the opening portion are The mesh-shaped metal foil which has is produced. By peeling this from the substrate, an electroformed mesh having a line part and an opening part can be obtained.
- the electroformed mesh faithfully reproduces the shape and surface structure of the substrate, so that even slight burrs, scratches and cracks generated when the substrate is created are transferred. That is, when burrs exist on the substrate surface, slight scratches and cracks resulting from transferring the burrs of the substrate also exist on the electroformed mesh. When such a scratch or crack exists in the mesh member, when the mesh member is pulled, stress is concentrated on the pulled portion, and the mesh member is easily damaged. Also, if a protrusion-shaped part is formed on the surface of the mesh member by transferring scratches or cracks on the substrate surface, the protrusion-shaped part may be removed by repeated contact with the squeegee during printing, and scratches or cracks may occur. There is. There is a risk that the mesh member may break due to such scratches or cracks.
- the electroformed mesh since it is necessary to peel off the mesh member from the substrate, the electroformed mesh also has a drawback that when the mesh member is peeled off from the base material, the portion where the line and the line intersect easily breaks.
- the line portion when a mesh member having a thickness of 25 ⁇ m or less and a large number of meshes is produced by electroforming, the line portion is often cracked during peeling from the substrate because the line width is narrow and the thickness is thin. If there are scratches or cracks on the surface of the mesh member, stress may concentrate on the scratches or cracks when the mesh member is stretched or when printing with a squeegee, so the mesh member may break from the scratches or cracks. .
- the electroformed mesh may have small scratches or cracks on the surface, or the strength may vary due to electrodeposition stress.
- the electroformed mesh has a large variation in strength, and there may be a portion with a low strength. Therefore, the strength when the mesh member is stretched on the screen frame or the pressing force (printing pressure) of the squeegee is the strongest. There is a risk of breaking from the lower part.
- the present invention has been made in view of such a situation, and the object thereof is a mesh member without an uneven portion on the squeegee contact surface which causes the paste to be difficult to stretch uniformly because the squeegee is easily caught. It is to provide a mesh member for screen printing having a uniform strength necessary for the above and having the number of meshes necessary for high-definition printing.
- the mesh member for screen printing according to the present invention that has solved the above-described problems is produced by forming a large number of openings and line portions by opening a large number of holes in a rolled metal foil, and at least constituting the line portions.
- One surface is flat, the thickness is 5 ⁇ m or more and 25 ⁇ m or less, and the tensile strength when converted to the breaking load (N) per 1 cm width of the tensile test piece is 20 N / cm or more.
- the number of meshes is 250 (lines / inch) or more.
- the opening ratio is 25% or more and not more than the value defined by the following formula (1)
- the appearance of the opening is: For example, it may be formed so as to spread toward the print object.
- the rolled metal foil used as the material for the screen printing mesh member of the present invention is not particularly limited, and examples include stainless steel, titanium or titanium alloy, nickel or nickel alloy, copper or copper alloy, and aluminum alloy. .
- an opening ratio means the ratio of the total area of an opening part with respect to the total area of the mesh member containing an opening part.
- the mesh member for screen printing of the present invention since the squeegee is easily caught, there is no uneven portion on the squeegee contact surface that causes the paste to be difficult to stretch uniformly, and has a uniform strength necessary as a mesh member. Thus, a screen printing mesh member having the number of meshes necessary for high-definition printing could be realized.
- FIG. 6 is a drawing-substituting photograph showing the shape of the mesh member obtained in Example 2.
- FIG. 6 is a drawing-substituting photograph showing the shape of the mesh member obtained in Example 3.
- FIG. 6 is a graph showing tensile strength (N / cm) per unit width of each test piece in Example 4.
- the present inventors have studied from various angles. As a result, the present inventors used a metal foil manufactured by rolling (hereinafter referred to as “rolled metal foil”) as a material, and formed a mesh member by subjecting this rolled metal foil to perforation processing.
- rolled metal foil a metal foil manufactured by rolling
- the present invention has found that it is possible to realize a high-definition mesh member for screen printing that has at least one surface constituting the line portion (surface on which the squeegee contacts) is flat, has a thickness of 25 ⁇ m or less, and has no variation in strength. completed.
- the mesh member of the present invention it is an important requirement to use a rolled metal foil as the material.
- the rolled metal foil has a flat surface, a thin and uniform thickness, a high tensile strength, and extremely little variation in strength.
- a mesh member is produced using such a rolled metal foil, a mesh member having almost no variation in thickness and strength can be obtained.
- the thickness of the rolled metal foil is reflected in the thickness of the mesh member. Therefore, by carrying out a large number of holes in a rolled metal foil having a thickness of 25 ⁇ m or less, an opening (hole) for allowing the paste to permeate, and a line for maintaining the strength when made into a mesh member ( A mesh member having a thickness of 25 ⁇ m or less can be realized.
- the surface of the mesh member and the photosensitive emulsion 4 in contact with the squeegee 6 is flat and the movement of the squeegee 6 is smooth [FIG. 3 (a)].
- the paste can be easily stretched evenly [FIG. 3B], and a high-definition pattern with a thin print film thickness d2 can be printed [FIG. 3C].
- the printed film thickness d2 can be calculated to be 15 ⁇ m or less by calculation with a mesh member having a thickness of 25 ⁇ m or less and an aperture ratio of 60% or less (see Table 1 above).
- the printed film thickness can be reduced as the thickness of the mesh member is reduced.
- a rolled metal foil having a thickness of less than 5 ⁇ m it is impossible to obtain a sufficient aperture ratio in order to ensure the strength required as a mesh member.
- the thickness of the mesh member of the present invention is 5 ⁇ m or more and 25 ⁇ m or less.
- the strength characteristics required for the mesh member are satisfied, but the history of research on strength is as follows.
- various mesh members having different opening ratios were produced by subjecting stainless steel foils having different thicknesses (5 ⁇ m or more and 25 ⁇ m or less) to punching by etching. Specifically, after drawing an opening pattern on a mask, applying a resist to a rolled stainless steel foil, exposing and developing the opening pattern of the mask, opening a hole by etching, and then removing the resist, A mesh member was produced.
- the thickness of the produced mesh member was measured with a micrometer (manufactured by Mitutoyo Corporation). Further, it was confirmed by observation with an optical microscope that the surface constituting the line portion 1a (ie, the surface with which the squeegee contacts) was flat. In addition, using the photographed microscopic image, the line width (width of the line portion 1a) and the opening width (hole width) were measured by general-purpose image processing software (manufactured by Nanosystem Co., Ltd.), and the pitch (line width and opening width) The number of meshes (lines / inch) was calculated from the total).
- the aperture ratio [opening width ( ⁇ m) 2 / pitch ( ⁇ m) 2 ⁇ 100 (%)] was calculated from the opening width and pitch. Furthermore, the minimum cross-sectional area (mm 2 / cm) per unit width, which corresponds to the cross-sectional area of the line portion between the openings per unit width, 10 mm x thickness (mm) x (1- ⁇ aperture ratio (%)) / 1 cm It was calculated from the following formula.
- the “ ⁇ aperture ratio (%)” means that, for example, when the aperture ratio is 50%, calculation is performed as ⁇ (0.5).
- a test piece having a width of 15 mm and a gage distance of 100 mm was cut out from the produced mesh member, and a tensile test was performed with a tensile tester (manufactured by Orientec Co., Ltd.).
- the breaking load (N) when the tensile test was performed was converted per 1 cm width of the tensile test piece and obtained as the tensile strength per unit width.
- the present inventors analyzed the factor which has influenced the tensile strength of a mesh member from the result of the said tension test. As a result, it was found that the tensile strength (N / cm) per unit width of a mesh member produced by punching a rolled metal foil was proportional to the minimum cross-sectional area (mm 2 / cm) per unit width. did. FIG. 4 shows the relationship between the minimum cross-sectional area per unit width (mm 2 / cm) and the tensile strength per unit width (N / cm).
- the stress becomes the largest at the line part between the openings with the smallest cross-sectional area, and the unit width of the mesh member produced by punching a rolled metal foil
- the tensile strength per unit is proportional to the minimum cross-sectional area per unit width.
- the strength of the rolled metal foil before producing the mesh member is usually represented by the tensile strength (N / mm 2 ), and shows a specific tensile strength depending on the type of the rolled metal foil. From this, the maximum value in the calculation of the tensile strength per unit width (N / cm) of the mesh member produced from the rolled metal foil is [tensile strength of the rolled metal foil (N / mm 2 )] ⁇ [ Minimum cross-sectional area per unit width (mm 2 / cm)].
- the present inventors performed a load test in order to evaluate whether the produced mesh member has a strength as a mesh member for a high-definition screen printing plate with a thin printing film thickness.
- the mesh member is clamped with a metal clamp that simulates the aluminum frame of the printing plate, and a tension gauge (manufactured by Protec Co., Ltd.) is placed in the center of the mesh member in the same manner as the screen printing plate. While measuring the subsidence amount (mm), the clamp sandwiching the mesh member was moved to stretch the mesh member. This is to evaluate in a simulated manner whether or not the squeegee can withstand the printing pressure (pressing load) in a state where the mesh member is stretched on the aluminum frame of the printing plate.
- test No. 1 and 2 (comparative example shown in FIG. 4) were damaged. Nos. 3 to 11 (Example shown in FIG. 4) were not damaged. That is, the test No. in which the mesh member was damaged.
- the tensile strength per unit width of Nos. 1 and 2 is less than 20 N / cm, and the test No. 1 has a tensile strength per unit width of 20 N / cm or more. None of 3 to 11 was damaged. From the results of this test, it was found that a mesh member that can be used for screen printing can be realized by setting the tensile strength per unit width of the mesh member to 20 N / cm or more.
- the tensile strength per unit width which was calculated by converting the breaking load (N) when the tensile test of the mesh member of the present invention was performed per 1 cm width of the tensile test piece, was 20 N / cm or more. .
- the present inventors also examined the relationship between the number of meshes of the screen printing mesh member and the printing accuracy. As a result, it has been found that the use of a high-viscosity paste results in less printing blur and enables high-precision printing. Further, in order to realize such high-precision printing, the number of meshes needs to be 250 (lines / inch) or more. For these reasons, in the mesh member of the present invention, the number of meshes is 250 (lines / inch) or more capable of printing a fine pattern. A mesh member having a mesh number of 250 (lines / inch) or more formed by making holes in the rolled metal foil can be obtained by setting the pitch, which is the sum of the line width and the opening width, to 100 ⁇ m or less.
- the mesh member obtained by perforating the rolled metal foil has a higher strength as the aperture ratio is smaller. However, when the aperture ratio is small, the amount of paste filled in the opening is reduced, and print fading may occur. Thus, when a mesh member with a changed aperture ratio was prototyped, a printing plate for screen printing was prepared and a printing test was conducted, printing blur occurred when the aperture ratio was less than 25%, but when the aperture ratio was 25% or more. It was found that good printing was possible.
- the maximum value for calculation of the tensile strength (N / cm) per unit width of the mesh member is [Tensile strength of rolled metal foil (N / mm 2 )] ⁇ [Minimum cross-sectional area per unit width (mm 2 / cm)] It is.
- the minimum cross-sectional area per unit width is 10 mm x thickness (mm) x (1- ⁇ aperture ratio (%)) / 1 cm It is.
- the calculated maximum value of tensile strength per unit width (N / cm) is Tensile strength (N / mm 2 ) ⁇ 10 mm ⁇ thickness (mm) ⁇ (1 ⁇ opening ratio (%)) ⁇ 1 cm of rolled metal foil The larger the aperture ratio, the smaller the calculated maximum value of tensile strength per unit width (N / cm).
- the mesh member for screen printing requires a tensile strength per unit width of 20 N / cm or more. From this, even when the thickness of the mesh member is different, the mesh member needs to be at least the opening ratio (calculated maximum opening ratio) at which the tensile strength per unit width is 20 N / cm.
- the aperture ratio of the mesh member is calculated by the above formula (1) in order to ensure an aperture ratio of 25% or more necessary for screen printing and to secure a tensile strength of 20 N / cm or more per unit width. It is preferable to set it to the upper maximum aperture ratio or less.
- the inventors have a tensile strength per unit width of the mesh member of 20 N / cm when the opening ratio of the mesh member is 25% or more and not more than the calculated maximum opening ratio calculated by the above formula (1). We examined whether the above could be secured. Since the tensile strength of the stainless steel foil used at this time is 1430 N / mm 2 , the calculated maximum opening ratio of the mesh member made of stainless steel foil is [1-20 (N / cm) ⁇ 1430 (N / mm 2 ) ⁇ thickness (mm) ⁇ 10] 2 ⁇ 100 (%) It can be calculated by When the thickness is 6 ⁇ m, the aperture ratio is 59%, when the thickness is 10 ⁇ m, the aperture ratio is 74%, when the thickness is 11 ⁇ m, the aperture ratio is 76%, and when the thickness is 21 ⁇ m, the aperture ratio is 87%.
- test No. The opening ratios of the mesh members 3 to 11 were all below the calculated maximum opening ratio, and the tensile strength per unit width was 20 N / cm or more.
- Test No. The aperture ratios of 1 and 2 exceeded the calculated maximum aperture ratio of 59% at a thickness of 6 ⁇ m, and the tensile strength per unit width was less than 20 N / cm.
- the shape (opening shape) of a large number of holes formed is not limited, and may be, for example, a circle or a hexagon (the overall shape of the mesh member is a honeycomb).
- a quadrangular shape as shown by A in FIG. 5 (the overall shape of the mesh member is a lattice shape) is suitable for maintaining strength while ensuring an aperture ratio.
- FIG. 6 is a diagram for explaining the external shape of the hole.
- FIG. 6A shows an external appearance shape of a normal hole in which the side wall of the hole 9 is perpendicular to the printing object (downward in FIG. 6).
- FIGS. 6B to 6D the appearance of the hole is formed so as to spread toward the printing object by variously devising the cross-sectional shape of the line portion 1a.
- 6B shows that the cross-sectional shape of the line portion 1a is an inverted trapezoidal shape
- FIG. 6C shows that the cross-sectional shape of the line portion 1a is a semicircular shape
- FIG. It shows that the cross-sectional shape of the line portion 1a is triangular.
- the paste wraps better. Therefore, the viscosity of the paste can be increased, and bleeding at the time of printing can be further reduced.
- the hole opening pattern is exposed and developed, and etching is performed only from one side of the rolled metal foil using a low concentration etching solution.
- the holes 9 having various appearance shapes shown in FIGS. 6B to 6D can be formed by dissolving a larger amount of.
- the aperture ratio of the mesh member when the hole shape is formed so as to expand toward the print object is the average value of the aperture ratios on the squeegee surface side and the print object surface side.
- Table 3 below shows the maximum aperture ratio calculated from the tensile strength of titanium foil, nickel foil, copper foil, and aluminum alloy foil when the thickness is 15 ⁇ m and when the thickness is 25 ⁇ m.
- the calculated aperture ratio of all the rolled metal foils was able to ensure an aperture ratio of 25% or more necessary as a mesh member for screen printing. From this result, it can be seen that titanium or titanium alloy, nickel and nickel alloy, copper or copper alloy, and aluminum alloy are practical as rolled metal foil for producing the product of the present invention, in addition to stainless steel.
- the titanium alloy, nickel alloy, copper alloy, and aluminum alloy that can be used as a material for the rolled metal foil in the present invention may be any material that can be formed into a foil shape.
- JISH4600 as titanium alloys
- JISCS2520 (1986) NCHRW1 etc. as nickel alloys
- JISH3130 C1720R-H as copper alloys
- JISH4000 5052 as aluminum alloys.
- Such a rolled metal foil is generally commercially available and can be easily obtained.
- Etching, shot blasting, laser processing, etc. can be adopted as a method for forming a large number of holes in the rolled metal foil as the material.
- the present inventors tried etching, shot blasting, and laser processing in order to punch a rolled metal foil.
- etching processing the following processing is performed in a state where a rolled metal foil is stretched and attached to a fixed plate having a flat surface such as glass.
- the following processing is performed in a state where a roll around which the rolled metal foil is wound is stretched, that is, in a state where the rolled metal foil is stretched so as not to have wrinkles.
- a photosensitive resist is applied as thinly as possible to the rolled metal foil, and then the opening pattern of the mesh drawn on the mask is exposed and developed to form the opening pattern on the rolled metal foil.
- the mask and the rolled metal foil are brought as close as possible to perform high resolution exposure, and the pattern of the opening drawn on the mask is exposed. -Use a calculated shape for deviation due to development and etching.
- the photosensitive resist only in the opening is removed by development to expose the rolled metal foil only in the opening.
- the etching solution is brought into contact with the rolled metal foil of only the opening to perform drilling.
- the mesh member of the present invention is obtained by removing the photosensitive resist after the perforating process.
- a resist is applied to the rolled metal foil in a state in which the rolled metal foil is stretched and attached to a fixed plate having a hard and flat surface such as glass. Then, after exposing and developing the opening pattern, the opening may be cut by applying a fine abrasive such as silicon carbide (SiC) to the rolled metal foil.
- SiC silicon carbide
- a hole is opened by irradiating a rolled metal foil with a laser.
- the opening by etching is most preferable from the viewpoint of the accuracy and speed of the opening.
- Example 1 Using a commercially available rolled stainless steel foil (manufactured by Toyo Seiki Co., Ltd .: Standard SUS304-H), a mesh member was obtained by punching by etching so that the shape of the opening became a square.
- the line part (1a shown in FIG. 3 and FIG. 6) of the mesh member at this time is flat, the thickness is 10 ⁇ m, the aperture ratio is 53%, and the number of meshes is 420 (lines / inch).
- the detailed manufacturing method of this mesh member is as follows. First, a rectangular opening pattern (pitch: 60 ⁇ m) was drawn on a mask, a photoresist was applied to a stainless steel rolled foil, and the pattern was exposed and developed.
- Example 2 Using a commercially available stainless steel rolled foil (manufactured by Toyo Seiki Co., Ltd .: Standard SUS304-H), a mesh member was obtained by punching by etching so that the shape of the opening became a round shape. The line part of the obtained mesh member is flat, the thickness is 10 ⁇ m, the aperture ratio is 47%, and the number of meshes is 250 (lines / inch).
- the detailed manufacturing method of this mesh member is as follows. First, a circular opening pattern (pitch 100 ⁇ m) was drawn on a mask, a photoresist was applied to a stainless steel rolled foil, and the pattern was exposed and developed.
- a mesh member was obtained by punching by etching and finally removing the photoresist.
- a printed film thickness of 5 ⁇ m was possible without tearing the mesh member.
- the shape of the mesh member obtained at this time is shown in Fig. 8 (drawing substitute micrograph).
- Example 3 Using a commercially available stainless steel rolled foil (manufactured by Toyo Seiki Co., Ltd .: Standard SUS304-H), a mesh member was obtained by punching by etching so that the shape of the opening became a round shape. The line part of the mesh member is flat, the thickness is 21 ⁇ m, the aperture ratio is 55%, and the number of meshes is 250 (lines / inch).
- the detailed manufacturing method of this mesh member is as follows. First, a circular opening pattern (pitch 100 ⁇ m) was drawn on a mask, a photoresist was applied to a stainless steel rolled foil, and the pattern was exposed and developed.
- Example 4 In order to compare and examine the strength of the electrolytic foil mesh member obtained by perforating the electrolytic metal foil produced by the plating method and the rolled metal foil mesh member of the present invention, the electrolytic foil mesh member and the present invention A tensile test of the rolled metal foil mesh member was performed.
- the electrolytic foil mesh member was produced by punching a commercially available electrolytic nickel foil (Fukuda Metal Foil Powder Co., Ltd., Ni: 99% or more) by etching.
- the electrolytic foil mesh member is flat on both sides constituting the line portion, has a thickness of 25 ⁇ m, a mesh number of 250 (lines / inch), an aperture ratio of 62%, and the side walls of the holes are vertical.
- the rolled metal foil mesh member of the present invention was produced by punching a commercially available rolled nickel foil (manufactured by Toyo Seiki Co., Ltd., standard VNi-H) by etching.
- the mesh member obtained by processing the rolled nickel foil is flat on both sides constituting the line part, has a thickness of 20 ⁇ m, a mesh number of 250 (lines / inch), an aperture ratio of 67%, and the side walls of the holes are vertical.
- a test piece having a width of 15 mm and a gauge distance of 100 mm was cut out from each mesh member, and a tensile test was performed.
- FIG. 10 shows the tensile strength per unit width of each test piece.
- the conventional electrolytic nickel foil mesh member had a larger variation in tensile strength per unit width for each test piece than the rolled nickel foil mesh member of the present invention.
- the mesh member of the present invention has a flat surface at the line part, the movement of the squeegee is smoother than that of a mesh knitted with fine lines having irregularities on the surface, and the paste is easily stretched evenly. Further, the presence of the smooth portion also has an advantage that it becomes easy to bond to the resin mesh when manufacturing a combination mask (a mask having a resin mesh at the periphery and a metal mesh at the center).
- the light-sensitive emulsion of the pattern portion which does not inherently cure the photosensitive emulsion because light reflects on the surface of the fine wire at the time of exposure after coating the photosensitive emulsion. Until it is cured.
- the larger the aperture ratio the smaller the halation at the time of exposure when preparing the printing plate.
- the mesh member of the present invention having a flat surface, the light reflection direction is constant as compared with a mesh member manufactured by knitting a thin line even with the same aperture ratio. Therefore, it can be expected that the halation during exposure is reduced, the width of the print pattern is uniform, and the resolution of the printing plate is increased.
Abstract
Description
印刷膜厚(μm)=印刷版の厚さ(μm)×開口率(%)
という関係が成り立つことが知られている。感光性乳剤4の厚さを含む印刷版の厚さは、メッシュ部材の厚さより薄くは出来ないので、薄い印刷版を得るためにメッシュ部材の厚さを薄くする努力がなされてきた。
10mm×厚さ(mm)×(1-√開口率(%))÷1cm
の計算式から算出した。尚、上記「√開口率(%)」は、例えば開口率が50%の場合は、√(0.5)として計算することを意味する。
[圧延金属箔の引張強さ(N/mm2)]×[単位幅当りの最小断面積(mm2/cm)]
である。単位幅当りの最小断面積は、
10mm×厚さ(mm)×(1-√開口率(%))÷1cm
である。従って、単位幅当りの引張強度(N/cm)の計算上の最大値は、
圧延金属箔の引張強さ(N/mm2)×10mm×厚さ(mm)×(1-√開口率(%))÷1cm
であり、開口率が大きいほど単位幅当りの引張強度(N/cm)の計算上の最大値は小さくなる。
20N/cm=圧延金属箔の引張強さ(N/mm2)×10mm×厚さ(mm)×(1-√開口率(%))÷1cm
の関係式から算出できるため、計算上の最大開口率は、下記(1)式で算出できることになる。
[1-20(N/cm)÷1430(N/mm2)÷厚さ(mm)÷10]2×100(%)
で算出できる。厚さが6μmでは開口率が59%、厚さが10μmでは開口率が74%、厚さが11μmでは開口率が76%、厚さが21μmでは開口率が87%である。検討の結果、試験No.3~11のメッシュ部材の開口率は、いずれも計算上の最大開口率以下であり、単位幅当りの引張強度が20N/cm以上であった。試験No.1,2の開口率は厚さ6μmでの計算上の最大開口率である59%を超えており、単位幅当りの引張強度が20N/cm未満であった。
市販のステンレス鋼圧延箔(東洋精箔株式会社製:規格SUS304-H)を用い、開口部の形状が四角形となるようにエッチングにより孔開け加工することによって、メッシュ部材が得られた。このときのメッシュ部材の線部(図3、図6に示した1a)は平坦であり、厚さは10μm、開口率は53%、メッシュ数は420(本/インチ)である。このメッシュ部材の詳細な作製方法は次の通りである。まず、マスクに四角形状の開口パターン(ピッチ60μm)を描画し、ステンレス鋼圧延箔にフォトレジストを塗布し、パターンを露光した後に現像した。現像後、エッチングにより孔開け加工し、最後にフォトレジストを剥離することにより、メッシュ部材が得られた。このメッシュ部材を用いて実際の印刷を行ったところ、メッシュ部材の破れも無く、印刷膜厚5μmの印刷が可能であることが確認できた。このとき得られたメッシュ部材の形状を、図7(図面代用顕微鏡写真)に示す。
市販のステンレス鋼圧延箔(東洋精箔株式会社製:規格SUS304-H)を用い、開口部の形状が丸型となるようにエッチングにより孔開け加工することによって、メッシュ部材が得られた。得られたメッシュ部材の線部は平坦であり、厚さは10μm、開口率は47%、メッシュ数は250(本/インチ)である。このメッシュ部材の詳細な作製方法は次の通りである。まず、マスクに丸形状の開口パターン(ピッチ100μm)を描画した後に、ステンレス鋼圧延箔にフォトレジストを塗布し、パターンを露光した後に現像した。現像後、エッチングにより孔開け加工し、最後にフォトレジストを剥離することにより、メッシュ部材が得られた。このメッシュ部材を用いて実際の印刷を行ったところ、メッシュ部材の破れも無く、印刷膜厚5μmの印刷が可能であることが確認できた。このとき得られたメッシュ部材の形状を、図8(図面代用顕微鏡写真)に示す。
市販のステンレス鋼圧延箔(東洋精箔株式会社製:規格SUS304-H)を用い、開口部の形状が丸型となるようにエッチングにより孔開け加工することによって、メッシュ部材が得られた。メッシュ部材の線部は平坦であり、厚さは21μm、開口率は55%、メッシュ数は250(本/インチ)である。このメッシュ部材の詳細な作製方法は次の通りである。まず、マスクに丸形状の開口パターン(ピッチ100μm)を描画した後に、ステンレス鋼圧延箔にフォトレジストを塗布し、パターンを露光した後に現像した。現像後、エッチングにより孔開け加工し、最後にフォトレジストを剥離することにより、メッシュ部材が得られた。このメッシュ部材を用いて実際の印刷を行ったところ、メッシュ部材の破れも無く、印刷膜厚12μmの印刷が可能なことが確認できた。このとき得られたメッシュ部材の形状を、図9(図面代用顕微鏡写真)に示す。
めっき法により作製された電解金属箔に孔開け加工することにより得られた電解箔メッシュ部材と、本発明の圧延金属箔メッシュ部材の強度を比較検討するために、電解箔メッシュ部材および本発明の圧延金属箔メッシュ部材の引張試験を行った。電解箔メッシュ部材は、市販の電解ニッケル箔(福田金属箔粉工業株式会社製、Ni:99%以上)にエッチングで孔開け加工することにより作製された。電解箔メッシュ部材は、線部を構成する両面が平坦、厚さ25μm、メッシュ数250(本/インチ)、開口率62%、孔の側壁が垂直である。本発明の圧延金属箔メッシュ部材は、市販の圧延ニッケル箔(東洋精箔株式会社製、規格VNi-H)にエッチングで孔開け加工することにより作製された。圧延ニッケル箔を加工したメッシュ部材は、線部を構成する両面が平坦、厚さ20μm、メッシュ数250(本/インチ)、開口率67%、孔の側壁が垂直である。各メッシュ部材から、幅15mm、標点距離100mmの試験片を切り出し、引張試験を実施した。
2 開口部
3 印刷パターン部
4 感光性乳剤(樹脂)
5 印刷版
6 スキージ
7 ペースト(インク)
7a 滲み
8 印刷対象物
9 孔
Claims (4)
- スクリーン印刷用メッシュ部材であって、
圧延金属箔に多数の孔を開けることにより多数の開口部および線部が作製されるとともに、前記線部を構成する少なくとも片方の面が平坦であり、
厚さが5μm以上かつ25μm以下であるとともに、引張試験を行ったときの破断荷重(N)を引張試験片の幅1cmあたりに換算した引張強度が20N/cm以上であり、
メッシュ数が250(本/インチ)以上であることを特徴とするスクリーン印刷用メッシュ部材。 - 前記開口部の外観形状が、印刷対象物に向かって広がるように形成される請求項1または2に記載のメッシュ部材。
- 前記圧延金属箔は、ステンレス鋼、チタン若しくはチタン合金、ニッケル若しくはニッケル合金、銅若しくは銅合金、およびアルミ合金のいずれかからなるものである請求項1に記載のメッシュ部材。
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WO2011046432A1 (en) * | 2009-10-12 | 2011-04-21 | Stork Prints B.V. | Screen printing |
CN105436476A (zh) * | 2014-09-18 | 2016-03-30 | 仓和股份有限公司 | 液态金属网布及其制造方法 |
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JP2012000844A (ja) * | 2010-06-16 | 2012-01-05 | Kobelco Kaken:Kk | スクリーン印刷用メッシュ部材 |
DE102014103722A1 (de) * | 2013-03-20 | 2014-09-25 | Johnson Electric S.A. | Verfahren zum Befestigen eines Metallblechs an einer Graphitstruktur mittels eines Hartlöt- und Weichlötverfahrens |
CN104064936A (zh) * | 2013-03-20 | 2014-09-24 | 德昌电机(深圳)有限公司 | 换向器及其制作方法 |
CN103552392B (zh) * | 2013-10-30 | 2015-08-26 | 黄石捷德万达金卡有限公司 | 一种交易卡大张内置烫印金属箔的生产方法 |
KR20160006477A (ko) | 2014-07-09 | 2016-01-19 | 동우 화인켐 주식회사 | 스크린 인쇄 방법 |
KR20160006507A (ko) | 2014-07-09 | 2016-01-19 | 동우 화인켐 주식회사 | 스크린 인쇄 플레이트 |
CN107634105A (zh) * | 2016-07-18 | 2018-01-26 | 正中科技股份有限公司 | 用于电池正银电极印刷的印刷钢版结构 |
CN110214088A (zh) * | 2016-12-06 | 2019-09-06 | 株式会社Nbc纱网技术 | 丝网版及其制造方法 |
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JP2011143728A (ja) | 2011-07-28 |
JP4886905B2 (ja) | 2012-02-29 |
KR20110099344A (ko) | 2011-09-07 |
KR20140009539A (ko) | 2014-01-22 |
JP2010234799A (ja) | 2010-10-21 |
CN102300720A (zh) | 2011-12-28 |
CN102300720B (zh) | 2013-07-17 |
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