JP2003175684A - Meshed fabric for screen printing and screen plate utilizing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a meshed fabric for screen printing in which the dynamic incommensurateness in warp and woof is eliminated and structurally reinforced by providing metal coating to the whole surface for fixation of the woven portion. <P>SOLUTION: The metal tissues that function as the printing pattern support in the screen plate are woven to provide the meshed fabric in which dynamic incommensurate state is adjusted. The dynamic incommensurateness is eliminated by coating the whole surface of the fabric with metal for fixture of the woven portion, thereby reinforcing the structure of the meshed fabric. The meshed fabric is stretched in a frame to obtain the screen plate for screen printing, and also the meshed fabric can be employed to the combination screen plate. As the meshed fabric is eliminated with dynamic incommensurateness in warp and woof, and coated with metal for reinforcement of the structure, printing patterns are not deformed and the printing accuracy is in a stable state even when used for a long period of time. Further, as the thickness of the meshed fabric can be reduced by adjusting the dynamic incommensurateness in warp and woof, the thickness of ink in printing can also be reduced. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mesh fabric for screen printing, which is structurally reinforced by eliminating mechanical history mismatch used for precision components such as electronic components, printed circuits, IC circuits, and precision printed circuit printing. , And a screen version using the same.

[0002]

2. Description of the Related Art Conventionally, mesh fabrics used in screen printing have been mainly made of chemical fibers such as nylon and polyester. However, with the increasing demand for more complicated printing patterns and higher precision, Metal fibers such as stainless steel, which has excellent dimensional accuracy from fibers, have become the mainstream, and at present, the surface of the metal fibers is plated to improve the dimensional accuracy.
No. 179258 and Japanese Patent Laid-Open No. 2000-177099 have been invented for the purpose of improving printing durability. In recent years, further miniaturization of electronic parts has progressed, and there is an increasing demand for finer patterns and thinner printing on screen plates. On the other hand, a large-scale, high-definition and high-precision screen plate for forming electrodes of a large flat display panel is also required. Further, in any of the situations, there is a demand for a screen plate having a stable printing dimension and high printing durability.

[0003]

However, in the above-mentioned prior art, there is a limit to thin printing because the mesh fabric is coated with plating, and in terms of long-term dimensional stability, the pattern is gradually deformed as it is printed. It has become difficult to fully meet these requirements.

In view of the above-mentioned circumstances, the present invention provides a mesh fabric prepared by braiding metal fibers functioning as a print pattern support in a screen printing plate, which has a mechanical and mechanical misalignment adjusted to be wet, The purpose of the present invention is to provide a mesh fabric for screen printing which is structurally reinforced by eliminating the mechanical history mismatch by fixing the braided portion with metal coating on the entire surface regardless of dry type, and to provide a screen plate using the same. To do.

[0005]

The present invention is intended to solve the above-mentioned problems, and employs the following technical means. According to the first aspect of the invention, the mesh fabric prepared by braiding the metal fibers functioning as the print pattern support in the screen plate and having the mechanical and mechanical misalignment adjusted is wet or dry. We adopted the technical means to eliminate the mechanical history mismatch by strengthening the structure by fixing the braided part with metal coating on the entire surface.

In the invention described in claim 2, claim 1
The mechanical means of the screen plate using the mesh fabric for screen printing, which is structurally reinforced, is adopted to eliminate the mechanical history inconsistency.

According to the invention of claim 3, claim 1
In the outer periphery of the structurally reinforced screen printing mesh fabric, which eliminates the mechanical history mismatch, the print load buffer made of stretchable fabric, film, sheet, etc. is provided and stretched on the frame. , The technical means of combination screen plate for screen printing was adopted.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION One of the methods for displaying the mechanical properties of a mesh fabric used for a screen printing plate is a load-elongation diagram. This is JIS-L1096-1
FIG. 9 is a diagram obtained by a tensile test specified in 990 (General textile test method), in which the vertical axis represents a load value and the horizontal axis represents elongation. That is, it is a curve showing the relationship between the load applied to the test piece and the elongation accompanying it in all the steps of the tensile test. This load-elongation diagram is very important data as one of the selection methods of the mesh fabric for the screen plate. Load-
This is because a mesh fabric having a high load and a low elongation can be expected to have high accuracy and high printing durability in the elongation diagram.

The mesh fabrics for screen printing can be roughly classified into those woven with a chemical fiber such as polyester and those woven with a metal fiber such as stainless steel. accuracy·
A metal fiber having a high load and a low elongation is generally used as the screen printing mesh fabric used for high printing durability.

However, the mesh fabric formed by braiding metal fibers has a directional property in weaving the fibers. This depends on the method of manufacturing the mesh fabric by the loom and the hardness of the metal material. Generally, mesh fabrics used for screen printing have a structure in which wefts are woven into warp yarns. Therefore, since the mesh fabric formed by braiding the metal fibers is woven with the warp and the weft woven in different bending states, different load-elongation diagrams are shown in the warp direction and the weft direction. In other words, the load-elongation diagrams in the warp direction and the weft direction of the mesh fabric formed by braiding the metal fibers are mechanically inconsistent with each other.

As described above, when a mesh fabric in which warp and weft are unbalanced and mechanically warp and weft mismatch is used for the screen plate, the dimensional accuracy is gradually deteriorated. In recent years, in order to prevent moire and stably print various pattern shapes, a method called bias tension in which a mesh fabric is stretched obliquely at an angle is generally used. As the number of prints on the printing plate increases, the pattern of the printed matter is biased,
Alternatively, a situation occurs in which the pattern is deformed by tilting the bias to + 90 °.

According to the present invention, after adjusting the mechanical warp / weft mismatch of a mesh fabric formed by braiding metal fibers, a metal coating is applied to the entire surface of the mesh fabric to eliminate the mechanical warp / misalignment, that is, the warp direction. , Load in the weft direction-the same shape as the elongation line
Alternatively, by producing a screen plate using a mesh fabric that is approximated, it is possible to provide a screen plate having no pattern deformation, high accuracy, and high printing durability.

Various methods can be used to adjust the mechanical and weft misalignment of a mesh fabric formed by braiding metal fibers. As one of the methods, a calender (compressor) is used to load and crush the braided portion of the mesh fabric, so that the mechanical-longitudinal misalignment can be adjusted relatively easily.

The method of applying a load to the braided portion of the mesh fabric and crushing it is a known method called calendering, but the purpose of this calendering is not to adjust the mechanical history mismatch, but only to adjust it. It is a method that has been used to simply reduce the amount of ink applied, that is, to reduce the thickness of the mesh fabric for printing ink thinly, and is significantly different from the object of the present invention.

In the present invention, processing is performed by applying an arbitrary load to the mesh woven fabric for the purpose of adjusting the mechanical history mismatch. Since this load is slightly different depending on the wire diameter and the number of meshes of the mesh fabric to be processed, it is necessary to appropriately adjust it depending on the mesh fabric to be processed.

Although the calendering method has been taken as an example of the method for adjusting the mechanical and mechanical deviation, any method may be used as long as the mechanical and mechanical deviation can be adjusted. As a method other than the calendering method, a method of spreading the mesh fabric, a method of using the calendering method and the spreading method in combination, and the like are effective.

By covering the entire surface of the mesh woven fabric in which the mechanical history mismatch is adjusted with Ni plating with an appropriate thickness by, for example, electroplating, and fixing the braided portion,
A mesh fabric with a high load and a low elongation can be obtained, and when the mesh fabric is used as a screen plate, it is possible to obtain a screen plate with high precision and high printing durability, in which pattern deformation does not occur. In addition, by applying a load to the braid and crushing it and then metallizing it, the mesh fabric can be made thinner than in the conventional technology, and as a result, the ink can be printed in a thinner thickness than before. become. Needless to say, various kinds of plating such as chrome plating, copper plating, etc. can be selected as well as Ni plating.

Although the electroplating method has been described as the metal coating method, any method may be used as long as the whole surface of the mesh fabric can be metal coated. As an example, if a method other than the electroplating method is mentioned, a wet method includes an electroless plating method, and a dry method includes PVD and CVD.

[0019]

The present invention will be described in detail below with reference to the accompanying drawings and precision experiments. This experiment is a comparative experiment by a tensile test for comparing the conventional technique and the technique of the present invention. In all comparative experiments, the grip length was 200 mm and the strip width was 50 m.
m, and the pulling speed is 100 mm / min. The mesh woven fabric braided with metal fibers used in the experiment has a 400 mesh and a wire diameter of 18 μm.

FIG. 1 is a load-elongation diagram of a mesh fabric in which the warp yarn 2 and the weft yarn 1 are not mechanically aligned, that is, the mechanical warp / weft mismatch is not adjusted. FIG. 2 is a mechanical warp / weft mismatch. With a thickness of 1 μm, it is possible to
A load-elongation diagram of a mesh fabric coated with i plating, FIG. 3 is a load-elongation diagram of a mesh fabric coated with Ni plating at a thickness of 3 μm on a mesh fabric that is not adjusted for mechanical deviation. FIG. 4 shows that when the thickness of the mesh fabric used in FIG.
The load-elongation diagram of the mesh fabric in which the mechanical history mismatch has been adjusted by reducing the thickness by 8%, and FIG. 5 shows 18 by the calendering method when the thickness of the mesh fabric used in FIG. 1 is 100%. The load-elongation diagram of the mesh fabric in which the thickness of the mesh fabric is adjusted to adjust the mechanical history mismatch by Ni plating with a thickness of 1 μm, and FIG. 6 shows the thickness of the mesh fabric used in FIG. A load-elongation diagram of a mesh fabric coated with Ni plating at a thickness of 3 μm on a mesh fabric in which the mechanical and lateral misalignment is adjusted by reducing the thickness by 18% by a calendering method when 100% is set. Fig. 7 is a load-elongation diagram of the mesh fabric in which the mechanical weft misalignment is adjusted by reducing the thickness by 32% by the calendering method when the thickness of the mesh fabric used in Fig. 1 is 100%, and Fig. 8 Is used in Figure 1. The thickness of the mesh fabric used is 100
%, The calendering method was used to reduce the thickness by 32% to adjust the mechanical history misalignment to a mesh fabric,
A load-elongation diagram of a mesh fabric coated with Ni plating at a thickness of 1 μm, and FIG. 9 shows 3 by the calendering method when the thickness of the mesh fabric used in FIG. 1 is 100%.
FIG. 6 is a load-elongation diagram of a mesh fabric in which the mechanical fabric misalignment is adjusted by reducing the thickness by 2% and the Ni fabric is coated to a thickness of 3 μm.

Next, the above results will be described in detail.
It is generally said that the load applied to the screen plate during screen printing is 200 N or less. Therefore, in this experiment, comparison was made on the locus of the load-elongation diagram up to the upper limit of 200N. 1 to 3 are mesh fabrics in which the mechanical history mismatch is not adjusted. As can be seen from FIG. 1, there is a history mismatch. The mesh fabric is covered with Ni plating of 1 μm in FIG. 2 and 3 μm in FIG. Although confirmed, it can be seen that the mechanical inconsistency has not been resolved. 1 to 3 show a conventional technique, and from these drawings, it can be expected that the conventional technique finally causes pattern deformation in long-term printing.

FIGS. 4 to 6 show the results obtained by the calendering method when the thickness of the mesh fabric of FIG. 1 is 100%.
It is a mesh fabric in which the thickness of 8% is reduced to adjust the mechanical history mismatch. FIG. 4, which is a mesh fabric not covered with Ni plating, and FIG. 5, which is a mesh fabric covered with 1 μm Ni plating, have 3 μm, although there is a history mismatch.
In FIG. 6, which is the mesh fabric covering the Ni plating of FIG. 6, it can be seen that the history misalignment is eliminated.

FIGS. 7 to 9 show that when the thickness of the mesh fabric of FIG.
It is a mesh fabric in which the mechanical history mismatch is adjusted by reducing the thickness by 2%. The mesh fabric in which the Ni plating is not coated is shown in FIG. 7, which has a history mismatch. However, in FIG. 8 where the Ni plating coating of 1 μm is applied, in FIG. 9 where the Ni plating coating of 3 μm is applied, the history mismatch is resolved. You can see that it is done.

From the above results, it is clear that the mechanical history mismatch of the mesh fabric is not completely eliminated by only crushing the braided portion of the mesh fabric, but can be completely eliminated by applying a metal coating of an appropriate thickness. is there. Further, it is clear that the metal coating provides a high load and a low elongation, and the mesh fabric can be structurally strengthened.

In other words, by performing a complex treatment of adjusting the mechanical and mechanical inconsistencies of the mesh fabric and coating the metal, it is possible to eliminate the mechanical and mechanical inconsistencies of the mesh fabric and structurally strengthen it.

By eliminating the mechanical and history inconsistency and laying a mesh fabric structurally reinforced by metal coating on the frame body, pattern deformation does not occur, and high precision
It is possible to provide a screen plate having high printing durability. Furthermore, since the thickness of the mesh fabric can be reduced,
It is possible to print thinner than before.

When the mesh fabric, which has been subjected to a high load and a low elongation due to the metal coating, cannot obtain the elasticity required for plate separation during printing, the outer peripheral portion of the mesh fabric is stretchable. By providing a print load buffer consisting of a certain woven fabric, film, sheet, etc. and stretching it on the frame, so called a combination, the print load buffer plays the role of an elastic body, pattern deformation does not occur, high precision -It is possible to provide a screen printing plate with high printing durability. Furthermore, since the thickness of the mesh fabric can be reduced, it is possible to print thinner than before.

[0028]

As a result of adopting the above configuration, the present invention provides
The following effects can be obtained. Since the mesh fabric of the present invention eliminates the mechanical history mismatch and is structurally reinforced by being coated with a metal, the screen plate using the mesh fabric has a deformed printing pattern even after long-term use. Do not have stable printing accuracy. In addition, the thickness of the mesh fabric can be made thinner by adjusting the mechanical history misalignment, so it is possible to print the ink thinner than the screen plate using the conventional mesh fabric with only metal coating. Is.

[Brief description of drawings]

FIG. 1 is a load-elongation diagram of a mesh woven fabric in which a mechanical history mismatch is not adjusted.

FIG. 2 is a load-elongation diagram of a mesh fabric having a thickness of 1 μm and coated with Ni plating on the mesh fabric in which the mechanical and longitudinal misalignment is not adjusted.

FIG. 3 is a load-elongation diagram of a mesh fabric having a thickness of 3 μm and a Ni fabric coated on the mesh fabric in which the mechanical and longitudinal misalignment is not adjusted.

FIG. 4 is 100% of the thickness of the mesh fabric used in FIG.
Is a load-elongation diagram of the mesh fabric in which the mechanical weft misalignment is adjusted by reducing the thickness by 18% by the calendering method.

FIG. 5: The thickness of the mesh fabric used in FIG. 1 is 100%.
Then, the calendering method was used to reduce the thickness by 18% to adjust the mechanical history misalignment to 1
FIG. 3 is a load-elongation diagram of a mesh fabric coated with Ni plating in a thickness of μm.

6] The thickness of the mesh fabric used in FIG. 1 is 100%.
In this case, the thickness of the mesh fabric was reduced by 18% by the calendering method to adjust the mechanical history mismatch, and
FIG. 3 is a load-elongation diagram of a mesh fabric coated with Ni plating in a thickness of μm.

7] The thickness of the mesh fabric used in FIG. 1 is 100%.
FIG. 6 is a load-elongation diagram of a mesh fabric in which the mechanical weft misalignment is adjusted by reducing the thickness by 32% by a calendering method.

FIG. 8: The thickness of the mesh fabric used in FIG. 1 is 100%.
Then, a mesh woven fabric with a mechanical thickness deviation reduced by 32% by a calendering method to adjust the mechanical history mismatch
FIG. 3 is a load-elongation diagram of a mesh fabric coated with Ni plating in a thickness of μm.

FIG. 9: The thickness of the mesh fabric used in FIG. 1 is 100%.
In this case, the thickness of the mesh fabric was reduced by 32% by the calendering method to adjust the mechanical history mismatch, and
FIG. 3 is a load-elongation diagram of a mesh fabric coated with Ni plating in a thickness of μm.

[Explanation of symbols]

1 ... Latitude 2 ... Meridian

Continued front page    (72) Inventor Junichi Ichiyanagi             2-15-10 Meguro Honcho Stock Exchange, Meguro-ku, Tokyo             Inside Sonocom F-term (reference) 2H114 AB03 AB05 AB07 AB10 AB17                       DA04 EA03 EA04 FA02 GA11

Claims (3)

[Claims] 1. A mesh woven fabric in which a mechanical history mismatch is adjusted in a mesh woven fabric in which metal fibers functioning as a print pattern support in a screen plate are braided,
A mesh fabric for screen printing, which is structurally reinforced by fixing the braided portion by metallizing the entire surface regardless of whether it is wet type or dry type and fixing the mechanical history. 2. A screen printing screen plate comprising the frame body stretched with a structurally strengthened mesh fabric for screen printing, which eliminates the mechanical history inconsistency in claim 1. 3. A print load buffer made of a stretchable fabric, a film, a sheet or the like is provided on the outer peripheral portion of the structurally reinforced mesh fabric for screen printing, which eliminates the mechanical history mismatch in Claim 1. A combination screen plate for screen printing, which is installed and stretched on the frame.