KR100629995B1 - Metal mesh textile for screen print - Google Patents

Abstract

A high mesh with a high strength, a small ductility, excellent dimensional accuracy, elastic recovery power and durability, and a large opening metal mesh fabric for screen printing are obtained.

Metal mesh fabric for screen printing, consisting of longitudinal lines and transverse lines of an austenitic stainless steel micro wire having a tensile strength of 2600 to 3,500 N / mm 2 and a ductility of 1 to 5%, indicating a tensile strength [tensile load at break (N ) ÷ measurement width (mm) ÷ thickness of mesh fabric] is 150 to 230 in both the longitudinal and transverse directions.

Screen Printing, Metal Mesh Fabric,

Description

Metal mesh textile for screen print

The present invention relates to a metal mesh fabric for screen printing. In addition, the present invention relates to a metal mesh fabric for screen printing for performing high precision and high density screen printing related to electronics.

In order to achieve high precision and high density printing by mesh fabric for screen printing, the ductility is small, the strength is high, the fabric can be stretched at high tension (high tension), the dimensional accuracy is excellent, that is, the dimensional change is small and stable, the elasticity It is required to have high resilience, excellent durability, thin wire diameter, and high mesh (high density mesh). Moreover, regarding printing of ink, paste, etc. with low viscosity, the mesh which has a thin linear diameter and a big opening (opening) is calculated | required.

Conventionally, screen printing mesh fabrics using synthetic fibers such as nylon and polyester are widely used. However, the screen printing mesh fabrics described above have problems in dimensional accuracy because of their high ductility and low strength and elastic modulus. Moreover, since these synthetic fibers are low in strength, it is difficult to weave high meshes with thin wire diameters or meshes with large openings.

For this reason, soft stainless steel mesh fabric is used for the precise printing which requires strict dimensional accuracy. However, soft stainless steel is not strong enough and has poor elastic recovery power. Therefore, when the number of times of printing increases, the misalignment of wires progresses, resulting in poor printing accuracy, and when a force exceeding the yield point is applied, the wire is elongated and is not recovered. There is a problem. In order to improve the printing accuracy, the plating of the soft stainless steel mesh fabric is carried out after the fabric is stretched. However, the plating process and the pollution prevention equipment are required, which is expensive and the opening is narrowed or clogged due to the plating. There is a problem.

In order to solve the above-mentioned problems, screening mesh fabrics using screen wires using metal wires having improved strength, thinning, high dimensional accuracy and excellent elastic recovery force have been studied. Screen printing mesh fabrics using amorphous alloy wires have strength but lack toughness, making them difficult to weave and have not been put to practical use. Screen printing mesh fabrics made using nickel wire of nickel-plated pearlite steel disclosed in Japanese Patent Laid-Open No. 6-166925 are excellent in strength, dimension precision, and elastic recovery, but the wire is degraded due to rust. The problem has not been solved, and it has not been brought to practical use.

Screen printing mesh fabrics using hard stainless wires are excellent in dimensional accuracy, but have insufficient strength and are prone to breakage and breakage during weaving, fabric pulling, engraving, subsequent storage, and printing.

In addition, when hard stainless wire is used for both vertical and horizontal lines, in the conventional weaving technique, since the degree of curvature of the vertical line is much larger than that of the horizontal line, the difference between the length and the ductility of the mesh fabric becomes large, and the dimensional accuracy degree at the time of printing There is a problem that they differ in the longitudinal and transverse directions. In particular, when printing a large area such as a plasma display panel, it is a very big problem that the dimensional accuracy at the time of printing differs in the longitudinal direction and the transverse direction. In addition, as a problem in weaving, the bending difference between the vertical line and the horizontal line should be adjusted only by applying a load on the weaving machine. There is a problem that can not weave efficiently.

DISCLOSURE OF THE INVENTION In view of the above problems, an object of the present invention is to provide a metal mesh fabric for screen printing, which has high strength, small ductility, high dimensional accuracy, elastic recovery power, and high durability and large opening.

Another object of the present invention is to provide a metal mesh fabric for screen printing that can be woven efficiently with a stable quality by adjusting the longitudinal and transverse direction of the dimensional ductility of the mesh fabric by reducing the ductility in the longitudinal and transverse directions. Is in.

In order to solve the above problems, the screen printing metal mesh fabric of the present invention has a longitudinal line of 2600 to 3,500 N / mm 2 and a ductility of 1 to 5% of the austenitic stainless steel micro wire and the tensile strength of 78 to 97% of the vertical line. (However, the tensile strength is 2600N / mm2 or more) and consists of a transverse line of an austenitic stainless steel ultra fine wire having a ductility of 1 to 5%, and indicates a tensile strength [tensile load at break (N) ÷ measurement width (mm) ) ÷ mesh thickness (mm)] is 150 to 230 in both the vertical and horizontal directions.
In addition, the screen printing metal mesh fabric of the present invention is a screen printing metal mesh fabric comprising a longitudinal line and a horizontal line of an austenitic stainless fine wire having a tensile strength of 2600 to 3,500 N / mm 2 and a ductility of 1 to 5%. The diameter is 90 to 98% of the longitudinal diameter of the vertical line, and the coefficient of tensile strength [the tensile load at break (N) ÷ measurement width (mm) ÷ thickness of the mesh fabric (mm)) is 150 to both vertical and horizontal directions. It is characterized by being 230.

Embodiment of the Invention

In the present invention, in order to obtain a metal mesh fabric for screen printing, an austenitic stainless steel wire (JIS standard SUS304) is used. The austenitic stainless steel wire is wired to a drawing machine and drawn, followed by a solid solution heat treatment (annealing), followed by drawing on a drawing machine. The above process is repeated several times to obtain an austenitic stainless microfine wire having a predetermined wire diameter. In the solid solution heat treatment, the steel wire is heated to a temperature of 1000 to 1150 占 폚 using a continuous annealing furnace flowing inert gas, and then quenched in hydrogen gas and nitrogen gas. This process is generally called bright annealing, and the reason for using hydrogen is to prevent oxidation of the surface and to quench using high thermal conductivity of hydrogen. In the final step, no solid solution heat treatment (annealing) is performed. Finally, the steel wire obtained is subjected to processing in which no kink or the like is generated to obtain a stainless steel micro wire. The obtained stainless micro fine wire has the characteristics of 2600-3500 N / mm <2> in strength, 1-5% of ductility, and 10-30 micrometers of wire diameters.

In the present invention, the austenitic stainless steel wire obtained as described above is used to weave a mesh mesh of 70 to 180 pieces / cm (180 to 460 pieces / inch) to obtain a metal mesh fabric for screen printing. The obtained screen printing metal mesh fabric has the property that the coefficient of tensile strength (the tensile load (N) at the time of breakage / the measurement width (mm) / the thickness of the mesh fabric (mm)) is 150 to 230 in both the vertical line and the horizontal line direction.

In the present invention, the difference between the bending of the vertical line and the bending of the horizontal line is reduced by using a horizontal line having a single tensile tensile strength less than the vertical line in the weaving process.

The reason why the bend of the vertical line increases is explained in detail. When weaving, vertical lines are repeated one by one on the loom. A horizontal line is inserted straight into the opening opened up and down the vertical line, and then the vertical line is reversed up and down to close the opening, thereby forming a mesh. In other words, the vertical line repeats the up and down movement, so that the vertical line inserted into the structure is inserted, so the bending degree of the vertical line is increased. The curvature of the vertical line increases as the number of meshes increases and the line diameter increases. This phenomenon is not limited to mesh fabrics made of hard stainless steel, but also to mesh fabrics made of synthetic fibers such as polyester and nylon or metal mesh fabrics made of soft stainless steel.

Since synthetic fibers such as polyester and nylon have thermoplasticity, the mesh fabric made of these synthetic fibers is stretched or shrunk by post-processing after weaving, thereby correcting the difference in the degree of bending between vertical and horizontal lines, thereby correcting the heat set. It is possible to fix the structure. Moreover, in the case of the metal mesh fabric which consists of soft stainless steel, since a wire | line is soft, a horizontal line tends to bend and it does not reach the big soft difference by that much.

In the case of the metal mesh fabric which consists of a hard stainless steel wire, an amorphous wire, a pearlite steel wire, etc., an element wire is hard and a horizontal line is hard to bend. For this reason, the difference of the curvature degree of a vertical line and a horizontal line becomes large. In addition, the metal does not have thermoplasticity, and correction by the heat set after weaving is not performed.

The inventors of the present invention do not excessively increase the curvature of the vertical lines, but give a lateral curvature to remove the difference in the degree of curvature between the vertical lines and the horizontal lines, and to study the method of reducing the ductility difference between the vertical lines and the horizontal lines as follows. Found.

In the weaving process, by using an element wire having a single line tensile strength of the horizontal line smaller than the single line tensile strength of the vertical line, the bending difference between the vertical line and the horizontal line is reduced. In this case, an element wire whose lateral line strength is 78 to 97% of the longitudinal line strength may be used, or an element wire whose line diameter of the lateral line is 90 to 98% of the line diameter of the vertical line may be used. The woven mesh fabric has a ductile ductility of 6.5% or less while the ductile ductility is less than 6.5% when the wire diameter is 10 µm or more and less than 21 µm and the number of meshes is 70 to 180 pieces / cm (180 to 460 pieces / inch). It is characterized by subtracting (ductility difference) within 3.5%. If the wire diameter is 21 µm or more and 30 µm or less, and the mesh number is 70 to 130 pieces / cm (180 to 330 pieces / inch), the fracture ductility is 8% or less and the longitudinal ductility minus the transverse ductility (ductility) Tea) is within 4.5%.

Moreover, by making small the difference of the curvature degree of a vertical line and a horizontal line as mentioned above, the difference of intensity | strength of the longitudinal direction and a lateral direction of a mesh fabric can be made small. Hard metal wires such as hard stainless steel wires, amorphous wires, pearlite steel wires, and the like have a property of lowering strength by bending. That is, when the mesh fabric is composed of hard metal wires as element wires, the greater the degree of bending, the lower the strength.

As shown in Table 1 of the Examples, when an element wire having the same strength is used for the vertical line and the horizontal line, the longitudinal line has a large degree of curvature and the horizontal line has a small degree of curvature, so that the strength in the longitudinal direction of the mesh fabric is higher than that of the horizontal line. Obviously it's small.

In addition, the mesh fabric which makes the difference of the bending of a vertical line and the bending of a horizontal line small is limited to the austenitic stainless steel wire used for this invention by using the small wire whose tensile strength of the horizontal line is smaller than the longitudinal tensile strength of a vertical line. The present invention is also applicable to mesh fabrics using rigid metal wires, including amorphous wires, pearlite steel wires, and the like.

In the production method of the present invention, since weaving can be performed on the weaving machine without applying more load than necessary, the shortcomings of the vertical lines such as vertical cutting and joints are remarkably reduced as compared with the conventional manufacturing method. For this reason, it becomes possible to weave efficiently with stable quality.

In the production method of the present invention, since the bending of the vertical line and the bending of the horizontal line can be adjusted by two methods, a combination of the vertical line and the horizontal line, and the adjustment of the load on the weaving machine, the manufacturing method of adjusting only the load on the weaving machine as in the prior art. The thickness can be easily adjusted. In particular, the thinning adjustment is easy.

At present, in high-precision and high-density printing, there is an increasing demand for printing thin films (thin printing film thicknesses of ink), and there is a great demand for thinning the thickness of the mesh fabric accompanying them. It is also possible to easily adjust the thickness of the mesh fabric to meet the demand for thin film printing. In addition, in order to reduce the thickness, the mesh fabric may be calendered (a method of forming the intersection of vertical and horizontal lines by rolling), but there is a problem that the strength of the mesh fabric is decreased by this processing. In order to solve this problem, a large mesh fabric is required.

The screen printing metal mesh fabric of the present invention is provided in the fabric printing process for screen printing, but the screen frame for fabric printing may be made of wood, metal or resin. However, since metal mesh fabrics are ideal for fabric tension at high tension (tensile tension), it is preferable to use metal screen frames.

Since the metal mesh fabric for screen printing of the present invention has a high strength, it is possible to stretch the fabric at high tension (tension) than the mesh fabric made of soft stainless steel or hard stainless steel.

Since the metal mesh fabric for screen printing of the present invention has a high strength, breakage at the time of fabric stretching or engraving, subsequent storage, and printing is significantly reduced than mesh fabrics made of soft stainless steel or hard stainless steel.

The metal mesh fabric which has undergone the fabric tensioning process is again subjected to a degreasing process to be applied to the photosensitive or thermosensitive resin emulsion coating step, but any of those generally used may be used as the photosensitive or thermosensitive resin emulsion. For example, heavy chromate salts such as ammonium dichromate, various diazo compounds, S.B.Q-based photosensitizers, and acrylic monomer-based photosensitizers are added to and mixed with resin compositions such as gelatin gum arabic, polyvinyl alcohol, vinyl acetate, and acrylic resins. One is used. Moreover, these resin compositions may contain an emulsifier and an antistatic agent as needed.

The coating thickness of the emulsion on the metal mesh fabric depends on the intended use. After applying an oil agent to a predetermined thickness according to the application amount, the dried metal mesh fabric is finished by exposure or heating.

Baking of the pattern varies depending on the oil or the like to be used. Usually, a high-pressure mercury lamp, a xenon lamp, a metahalide or the like (about 4 kw) is used as a light source and exposed for 1 to 5 minutes at a distance of about 1 to 1.5 m. The unsensitized part is removed with a water spray and, after the drying process, provided to the printing process.

The screen printing mesh fabric of the present invention is a ductile, high strength, excellent dimensional accuracy, high elastic recovery power and excellent durability, and a mesh fabric of high mesh or opening with a large linear diameter, high precision and high density printing Make it possible.

(Example)

The results of the measurement of the properties of the mesh fabrics shown in Tables 1, 2 and 3 are the test results carried out under the following conditions in accordance with JIS L 1096 (label strip method).

Lecture measurement measuring instrument: Shimadzu Corporation Autograph AGS-500B

Measuring length: 200mm
Measuring width: 50mm

            Tensile Speed: 100mm / min

            Chart Speed: 1OOmm / Min

Thickness gauge: Digimatic MG4 manufactured by Tokyo Process Service

According to the JIS L 1096 label strip method, in the mesh fabrics of the respective examples and the comparative examples, test pieces of 300 mm in length and 50 mm in width in the longitudinal direction and in the transverse direction were made, respectively, and at the time of breaking the test pieces having the width of 50 mm under the tensile strength of 100 mm / min. Tensile load (N) and fracture ductility (%) of were measured. Determine the cross-sectional area of the specimen from the measured width (mm) and the measured thickness, and from the tensile strength (N) at the next break and the cross-sectional area, the strength factor, that is, the tensile load at break (N) ÷ measured width (mm) ÷ mesh thickness (mm) was obtained. In addition, the measurement width and a test piece have the same meaning.
The mesh fabrics of the first to sixth examples were woven under the number of meshes and the stranding conditions shown in Table 1, the physical properties of the mesh fabrics were measured, and the measurement results are described in Table 1. Similarly, the physical properties of the number of meshes shown in Table 1 and the commercially available mesh fabric under the wire condition were measured, and the measurement results are described in Table 1 as Comparative Examples 1 to 6 (C1 to C6). The ductility of the first embodiment, the third embodiment to the sixth embodiment is about 2.5%. The ductility of the second embodiment is about 3.0%.

The judgment was made that the strength coefficient [tensile load at break (N) ÷ measurement width (mm) ÷ mesh thickness (mm)] was within the range of 150 to 230 in both the longitudinal and horizontal directions, and the outside of the range was ×. .

High strength indicates excellent elastic recovery and durability, and indicates that breakage and damage in each process from weaving to printing can be reduced. This is especially necessary for thin meshes with high meshes and large openings.

As can be seen from Table 1, the first to sixth embodiments of the present invention have a strength coefficient indicating tensile strength [tension load at break (N) ÷ measurement width (mm) ÷ mesh fabric thickness (mm). )] Is in the range of 150 to 230 in both the longitudinal and horizontal directions, and it can be seen that the strength is much greater than that of Comparative Example 1 (C1) to Comparative Example 6 (C6).

Table 2 is a result of measuring the physical properties of the obtained mesh fabric by weaving a mesh fabric of 114 mesh / cm, (290 mesh / inch) while changing the swept line condition. The seventh to tenth embodiments have changed the strength conditions of the horizontal lines, and the eleventh to sixteenth embodiments have changed the linear diameter conditions of the horizontal lines. In addition, the ductility difference is a value obtained by subtracting the transverse ductility from the longitudinal ductility.

As shown in Table 1, the determination of the strength coefficient is performed by indicating that the strength coefficient (tension at break (N) ÷ measurement width (mm) ÷ mesh thickness (mm)) is within a range of 150 to 230 in both the longitudinal and horizontal directions. And the thing outside the range was made into x.

In the ductility determination, the ductility difference was less than 6.5% and the ductility difference was less than 3.5% in both the longitudinal direction and the transverse direction, and the ductility difference was greater than 6.5% and the ductility difference was greater than 3.5%.

Fracture ductility of less than 6.5% indicates that the mesh fabric is difficult to stretch and is excellent in print size accuracy. A ductility difference of less than 3.5% indicates that the ductility difference is small and the print size precision in the longitudinal and transverse directions is adjusted.

In the seventh, eighth, ninth and tenth embodiments, the ductility difference is within 6.5% and the ductility difference is within 3.5% in both the longitudinal and transverse directions. At this time, the disconnection tensile strength of the horizontal line is 78 to 97% of the disconnection tensile strength of the vertical line.

The twelfth to sixteenth embodiments also have a ductility of less than 6.5% and a ductility difference of less than 3.5% in both the longitudinal and transverse directions. At this time, the linear diameter of the horizontal line is 90 to 98% of the longitudinal diameter, and the tensile strength of the horizontal line is 80 to 97% of the longitudinal tensile strength of the vertical line.

Table 3 shows the results of measuring the physical properties of the mesh fabric obtained by weaving a mesh fabric of 90 meshes / cm (230 fabrics / inch) while changing the sintering condition of the horizontal line. In the seventeenth to twentieth embodiments, the strength conditions of the horizontal lines were changed, and in the twenty-first and twenty-sixth embodiments, the linear diameter conditions of the horizontal lines were changed.

As shown in Table 1, the determination of the strength coefficient is performed by indicating that the strength coefficient (tension at break (N) ÷ measurement width (mm) ÷ mesh thickness (mm)) is within a range of 150 to 230 in both the longitudinal and horizontal directions. And the thing outside the range was made into x.

In the ductility determination, the ductility difference was less than 8% while the ductility difference was less than 8% in both the longitudinal direction and the transverse direction, and the ductility difference was greater than 8%, and the ductility difference was greater than 4.5%.

A fracture ductility of less than 8% indicates that the mesh fabric is less likely to be elongated and the print size precision is excellent. A ductility difference of less than 4.5% indicates that the ductility difference is small and the print size precision in the longitudinal and transverse directions is adjusted.

In the 17th, 18th, 19th, and 20th embodiments, the ductility difference was less than 8% and the ductility difference was less than 4.5% in both the longitudinal and transverse directions. At this time, the disconnection tensile strength of the horizontal line is 78 to 97% of the disconnection tensile strength of the vertical line.

In Examples 22 to 26, the ductility difference was less than 8% while the ductility difference was within 4.5% in both the longitudinal and transverse directions. At this time, the linear diameter of the horizontal line is 90 to 98% of the vertical line diameter, and the single line tensile strength of the horizontal line is 80 to 97% of the single line tensile strength of the vertical line.
In Tables 1, 2, 3, 8 and their descriptions, what is mentioned in the longitudinal and transverse directions is the same as in the longitudinal and transverse directions.

Table 4 shows the weaving conditions according to the firing conditions and the weave loads. The woven mesh fabric has 114 mesh / cm (290 mesh / inch). The numerical value of the weave load is expressed as a percentage of the fourth embodiment, and the smaller the value, the lighter the loom load, and the larger the value, the heavier the loom load. The number of longitudinal cuts and the number of joints indicates the number of occurrences of each defect with respect to the length of the weaving (m). The smaller the value, the less defects and the better the weaving state.

4 of Comparative Example 7 in which a loom load was applied to the fourth embodiment by force in order to compare the firing conditions of the fourth, eighth, and thirteenth embodiments with the case where the bending of the vertical line was adjusted only by the load on the loom. Weaving conditions were compared under two conditions. The fourth embodiment, the eighth embodiment, and the thirteenth embodiment are each woven 200 m, and the results are shown. In Comparative Example 7, since the weaving was stopped at the step of weaving 30 m because the weaving was difficult, the result is shown at 30 m.

The judgment of the weaving condition was that the defect had little defects and was excellent in quality and weaving, and that the defects were slightly higher but that the quality and weaving were not particularly affected.

As can be seen from the results of Table 4, in the weaving process, the vertical line on the weaving machine is used when the difference in the bend of the longitudinal line and the bend of the horizontal line is reduced by using an element wire having a single line tensile strength less than the single line tensile strength of the vertical line. It is possible to reduce the load on the vertical line, and the load on the vertical line becomes small, so that defects such as vertical cutting and joints are significantly reduced.

Table 5 shows the results of fabric tensioning by direct tension, which is a method of directly grasping the mesh fabric for screen printing and pulling it with a stretcher to fix the screen frame. The mesh fabrics of Example 3 and Comparative Examples 1 and 4 were tested. Stretcher, Minoglobe, and Tension Gauge used Tokyo Process Service, and the fabric tension frame used 12-inch aluminum die-cast frame. The smaller the value of the setting value, the more fabrics can be tensioned with high tension. The smaller the decrease in the tensile force (the difference between the set value and the cut value), the larger the elastic recovery force, the smaller the dimensional change and the higher the dimensional accuracy.

As can be seen from the results in Table 5, the third embodiment, which is the present invention, is capable of fabric tension, which is straight tensile, with a much higher tensile force than Comparative Examples 1 and 4, and the change in tensile force after cutting is small. Since fabric tensioning at high tension (tensile tension) is possible, the breakage of the mesh fabric at the time of fabric tension can be significantly reduced, the decrease in tensile force is small, and the dimensional accuracy at the time of printing can be significantly improved.

Table 6 shows the results of dot printing and line / space printing. The mesh fabric used for printing is the mesh fabric of Example 3 and Comparative Example 1. The physical properties and plate tension of the used mesh are as shown in Table 6.

The printing test was carried out under the following conditions.

Printing Press: Price MC-212

Paste: Silver Paste MH-193A

Frame: 12 inches, aluminum die cast

Fabric Tensile Method: Straight tensile / bias angle 22.5 °

Emulsion: Diano resin

Film thickness: 14㎛

Dot printing result A ... pattern dot diameter: 70㎛

                    Number of pattern dots: 56

Dot printing result B ... pattern dot diameter: 100㎛

                    Number of pattern dots: 25

Line / Space Print Results ··· Pattern Line Width: 100㎛

                            Pattern space width: 100㎛

Dot printing was printed by using a plate produced by using two patterns of a dot diameter of 70 mu m x 56 patterns and a dot diameter of 100 mu m x 25 patterns. The print diameter of the dot print result is the result of measuring the diameter of the printed dot. The diameter of the pattern and the value of the diameter of the printed dot are the same, and the smaller the error, the better the reproducibility and the higher the printing. The number of prints is the result of counting that the printed dots form the dots. The smaller the number of prints with respect to the number of patterns, the more difficult to form dots, indicating poor print reproducibility and low print accuracy.

Line / space printing was printed by the board plated using the pattern of 100 micrometers of line widths, and 100 micrometers of space widths. The line print width of the printed result is a result of measuring the width of the printed line. Space width is the result of measuring the distance between printed lines and lines. The width of the pattern and the width of the printed line and the width of the space are the same, and the smaller the error, the better the reproducibility and the higher the printing.

As can be seen from the printing result of Table 6, the third embodiment, which is the present invention, is capable of printing with a higher accuracy than the comparative example 1.

Table 7 shows the result of fine line printing. The mesh fabric used for printing is the mesh fabric of Example 4 and Comparative Example 2. FIG. The physical properties and the tension of the mesh used are as shown in Table 7. The line width of the pattern is 40 µm.

Printing press: Nelong LS-15GX

Paste: Dupont silver paste

Frame: 12 inches, made of aluminum die cast

Fabric Tension Method: Combination TensionBias Angle 22.5 °

Emulsion: Diazo resin

When printing with high density and high precision, the mesh fabric which can print the very thin line of 40 micrometer width is needed.

As can be seen from the printing results in Table 7, the mesh fabric of the fourth embodiment of the present invention can stably print a line of 40 mu m, which enables high precision and high density printing.

Table 8 shows the results of measuring the print dimension accuracy. The mesh fabrics used for printing are the mesh fabrics of Examples 4 and 8 and the mesh fabrics of Comparative Examples 2 and 5. The pattern used was a lattice pattern, the intersection was 25 points, and the size was vertical x horizontal = 350 mm x 250 mm.

The printing test was carried out under the following conditions.

Printing press: Nelong LS-34GX

Frame: 750mm × 750mm stainless steel

Fabric Tensile Method: Combination / Normal Tensile

Pan Tension: 1.10mm

Emulsion: Diazo resin

Print Direction: Vertical Line Direction

The measurement of the print size precision was obtained by measuring the misalignment between the 25 points of intersection of the grid of the plate and the 25 points of intersection of the grid of the printed matter by measuring instrument. The maximum height represents the largest deviation value among the 25 points, the minimum height represents the smallest deviation value among the 25 points, and the average value represents the average value of the deviations of 25 points. The smaller the number of deviation between the plate and the printed matter, the better the print size precision. In addition, even if the number of prints increases, the smaller the dimensional change, the more excellent the print size precision, elastic recovery force, and durability.

As can be seen from the printing results of Table 8, the mesh fabrics of the fourth and eighth embodiments of the present invention are much smaller in dimensional change than the mesh fabrics of Comparative Examples 2 and 5, and smaller in dimensional change even if the number of prints increases. . That is, it turns out that it is very excellent in dimensional accuracy, elastic recovery force, and durability. In addition, when comparing the mesh fabric of the fourth embodiment with the mesh fabric of the eighth embodiment, it can be seen that the mesh fabric of the eighth embodiment having a smaller ductility difference in the longitudinal direction and the lateral direction has better dimensional accuracy.

The present invention has all the conditions required for screen printing mesh fabrics of high strength, small ductility, excellent dimensional accuracy, elastic recovery force and durability, and therefore, high precision and high density printing are made possible. Further, by reducing the ductility difference in the longitudinal direction and the transverse direction, it is possible to efficiently provide the screen printing mesh fabric with the print dimension precision in the longitudinal direction and the transverse direction at a stable quality.

Claims (6)

Longitudinal lines of austenitic stainless steel microwires having a tensile strength of 2600 to 3500 N / mm2 and a ductility of 1 to 5%, and a tensile strength of 78 to 97% of a longitudinal line (but more than 2600 N / mm2 of tensile strength) and a ductility of 1 It consists of transverse lines of austenitic stainless steel micro wires of ˜5%, and the coefficient of tensile strength [tension load at break (N) ÷ measurement width (mm) ÷ mesh thickness (mm)] is in both vertical and horizontal directions. Screen printing metal mesh fabric, characterized in that from 150 to 230. In the screen printing metal mesh fabric which consists of a longitudinal line and a horizontal line of an austenitic stainless steel micro fine wire having a tensile strength of 2600 to 3500 N / mm 2 and a ductility of 1 to 5%, the linear diameter of the horizontal line is 90 to 98% of the vertical diameter of the vertical line. And a tensile strength coefficient (tension load at breakage (N) ÷ measurement width (mm) ÷ mesh thickness (mm) at break) is 150 to 230 in both vertical and horizontal directions. . The method according to claim 1 or 2, And a mesh diameter of 10 to 30 µm, and a mesh number of 70 to 180 pieces / cm (180 to 460 pieces / inch). The method according to claim 1 or 2, It consists of longitudinal lines and transverse lines of an austenitic stainless steel micro wire having a wire diameter of 10 µm or more and less than 21 µm, with a mesh number of 70 to 180 / cm, a ductility of 6.5% or less, and a longitudinal ductility minus transverse ductility ( Soft car) screening metal mesh fabric, characterized in that less than 3.5%. The method according to claim 1 or 2, It consists of longitudinal lines and transverse lines of an austenitic stainless steel micro wire having a wire diameter of 21 µm or more and 30 µm or less, 70 to 130 mesh / cm, fracture ductility of 8% or less, and longitudinal ductility minus transverse ductility (ductility) Screen) metal mesh fabric for screen printing, characterized in that less than 4.5%. delete