JP6925651B2 - Screen printing plate and manufacturing method of screen printing plate - Google Patents

Description

The present invention relates to a screen printing plate and a method for manufacturing a screen printing plate.

There is a mesh-integrated metal mask (so-called suspend metal mask) in which the screen mesh and the metal film are integrated with a plating film and surrounded by the metal film to form an ink passage space according to the image pattern (for example). See Patent Documents 1 to 3). Since such a metal mask is made of metal, it is excellent in solvent resistance, dimensional stability, durability, and smoothness of the printed surface.

Japanese Unexamined Patent Publication No. 8-183151 Japanese Unexamined Patent Publication No. 2005-125547 JP-A-2010-42567

In the above-mentioned screen printing plate, it is required to improve the strength while suppressing the decrease in ink ejection property.

An object of the present invention is to provide a screen printing plate and a method for manufacturing a screen printing plate, which can improve the strength while suppressing a decrease in ink ejection property.

In order to achieve the above object, the screen printing plate of the present invention is a screen printing plate in which a screen mesh and a metal film are integrated and surrounded by the metal film to form an ink passage space according to an image pattern. The thickness of the plating film portion formed in the opening of the mesh metal film overlapping portion whose position overlaps with the metal film of the screen mesh is the mesh transmission overlap in which the position overlaps with the ink passing space of the screen mesh. It is characterized in that it is thicker than the thickness of the plating film formed in the opening of the portion.

In this way, the thickness of the plating film formed in the opening of the mesh metal film overlapping portion where the position overlaps with the metal film of the screen mesh is within the opening of the mesh transmission overlapping portion where the position overlaps with the ink passage space of the screen mesh. It is thicker than the thickness of the formed plating film portion. Therefore, it is possible to improve the strength by the thick-walled plating film portion while suppressing the deterioration of the ink ejection property in the ink passing space. In addition, it has a screen mesh, a plating film, and a metal film, and is surrounded by the metal film to form an ink passage space according to the image pattern. Therefore, solvent resistance, dimensional stability, durability, and smoothness of the printed surface are formed. Excellent in sex.

In this case, it is preferable that the plating film portion formed on the mesh metal film overlapping portion and the plating film formed on the mesh transmission overlapping portion align the height positions of the tip portions on the squeegee side.

By doing so, the squeegee can be smoothly moved during printing, so that the life of the squeegee can be improved.

Further, it is preferable that the tip portion of the plating film portion formed on the mesh metal film overlapping portion on the squeegee side is polished.

In this way, the squeegee can be moved more smoothly during printing, so that the life of the squeegee can be further improved.

The method for manufacturing a screen printing plate of the present invention is a screen formed by integrating a metal film formed by surrounding an ink passage space according to an image pattern and a screen mesh with a plating film, and coating the screen mesh with the plating film. The ink passage space and the screen mesh coating are formed by an integrated plating step of forming an intermediate having a mesh coating, and by applying a photosensitive material to the intermediate and exposing and developing the photosensitive material. A coating step of forming a cured photosensitive material layer on a coating material transmission overlapping portion whose position overlaps with the ink passage space of the body, and the metal film of the screen mesh coating body on which the photosensitive material layer is not formed. It is characterized by including a reinforced plating step of forming a plating film portion on an overlapping portion of a covering metal film whose positions overlap, and a removing step of removing the photosensitive material layer.

An intermediate having a screen mesh coating body in which a metal film formed by surrounding an ink passage space according to an image pattern and a screen mesh are integrated with a plating film by an integrated plating process, and the screen mesh is coated with a plating film. Form the body. Then, in the coating step, a photosensitive material is applied to the intermediate, and the photosensitive material is exposed and developed, so that the positions of the ink passing space and the ink passing space of the screen mesh coating overlap each other. A cured photosensitive material layer is formed. Next, a plating film portion is formed in the coating film metal film overlapping portion where the position overlaps with the metal film of the screen mesh coating film on which the photosensitive material layer is not formed by the reinforced plating step. Then, the plating film portion becomes thicker in the opening of the covering metal film overlapping portion without the photosensitive material layer, and the position overlaps with the ink passage space of the screen mesh covering portion having the photosensitive material layer. The thickness of the plating film formed inside does not increase. Then, the photosensitive material layer is removed by the removing step. As a result, the thickness of the plating film portion formed in the opening of the mesh metal film overlapping portion where the position overlaps with the metal film of the screen mesh becomes within the opening of the mesh transmission overlapping portion where the position overlaps with the ink passage space of the screen mesh. A screen printing plate thicker than the thickness of the formed plating film can be easily manufactured.

In this case, in the coating step, it is preferable to apply a photosensitive material to the intermediate and expose the photosensitive material from the printed matter side of the intermediate for development.

In order to form a plating film portion in the overlapping portion of the coating metal film whose position overlaps with the metal film of the screen mesh coating body in which the photosensitive material layer is not formed by the reinforced plating step, the screen mesh coating body is formed in the coating step. Prevents the formation of a cured photosensitive material layer on the overlapping portion of the metal film of the covering body. In the coating process, by exposing the photosensitive material from the side of the intermediate to be printed, the metal film serves as an exposure mask, and a cured photosensitive material layer is formed on the overlapping portion of the coating metal film of the screen mesh coating. You can prevent it from being done. Therefore, the coating process can be performed efficiently.

In this case, it is preferable to include a polishing step of polishing the plating film portion formed on the covering metal film overlapping portion from the squeegee side in the reinforcement plating step.

In this way, the tip surface of the plating film portion on the squeegee side can be used as the polished surface. Therefore, the squeegee can be moved more smoothly during printing, so that the life of the squeegee can be further improved.

Further, it is preferable to include a tip coating step of coating the screen mesh covering body or the tip portion of the screen mesh on the squeegee side with a plating resist layer before the reinforcing plating step.

In this way, the film thickness can be substantially reduced.

According to the present invention, it is possible to provide a screen printing plate and a method for manufacturing a screen printing plate, which can improve the strength while suppressing the decrease in ink ejection property.

It is a top view which shows typically the screen printing plate of 1st Embodiment which concerns on this invention. It is an XX cross-sectional view of FIG. 1 which schematically shows the screen printing plate of 1st Embodiment which concerns on this invention. It is a partially enlarged plan view which shows schematic the screen printing plate of 1st Embodiment which concerns on this invention. It is a partially enlarged cross-sectional view which shows roughly the screen printing plate of 1st Embodiment which concerns on this invention. It is a thing. It is a partially enlarged cross-sectional view which shows each step of the manufacturing method of the screen printing plate of 1st Embodiment which concerns on this invention roughly, (a) is a preparation step, (b) is a 1st exposure step, ( c) shows the first removing step, and (d) shows the first plating step. It is a partially enlarged cross-sectional view which shows each step of the manufacturing method of the screen printing plate of 1st Embodiment which concerns on this invention schematicly, (a) is a 1st polishing step, (b) is a 2nd plating step. , (C) indicate the second removal step, respectively. It is a partially enlarged cross-sectional view which shows each step of the manufacturing method of the screen printing plate of 1st Embodiment which concerns on this invention schematicly, (a) is a coating process and 2nd exposure process, (b) is a 3rd. The removal step is shown, and (c) shows the third plating step. It is a partially enlarged sectional view schematically showing the screen printing plate of the 2nd Embodiment which concerns on this invention. It is a partially enlarged cross-sectional view which shows schematic the additional coating process of the manufacturing method of the screen printing plate of 2nd Embodiment which concerns on this invention. It is a partially enlarged cross-sectional view which shows schematic the additional exposure process of the manufacturing method of the screen printing plate of 2nd Embodiment which concerns on this invention. It is a partially enlarged sectional view schematically showing the screen printing plate of the modification of the 2nd Embodiment which concerns on this invention.

[First Embodiment]
The screen printing plate and the method for manufacturing the screen printing plate according to the first embodiment according to the present invention will be described below with reference to FIGS. 1 to 7.

As shown in FIG. 1, the screen printing plate 11 of the first embodiment is made of metal and has a high-rigidity square frame-shaped plate frame material 12 and a metal that is attached and fixed to the plate frame material 12 in a tense state. It has a screen mesh covering body 13 made of. The plate frame material 12 and the screen mesh covering body 13 form the support 14. The screen printing plate 11 has a metal film 15 supported by the support 14. The metal film 15 is formed in an inner range away from the plate frame material 12 of the screen mesh covering body 13.

As shown in FIG. 2, the screen mesh covering body 13 has a metal screen mesh 17 and a plating film 18 that covers the screen mesh 17. The screen mesh 17 is a woven fabric formed by weaving metal wire rods 19 having a circular cross section in the vertical and horizontal directions. The screen mesh covering body 13 is attached and fixed to the plate frame material 12 shown in FIG. 1 in a tense state on the screen mesh 17. As shown in FIG. 2, the screen mesh 17 of the screen mesh covering body 13 supports the metal film 15. The metal film 15 is a plating film formed by a plating process. The position of the metal film 15 biased to one side in the thickness direction is supported by the screen mesh 17.

Of the screen mesh 17, the portion where the position overlaps with the metal film 15 in the plane direction in which the screen mesh 17 spreads is the mesh metal film overlapping portion 20. The mesh metal film overlapping portion 20 is embedded in the metal film 15. The mesh metal film overlapping portion 20 and the metal film 15 are plate film portions 21 that restrict the passage of ink. The plate film portion 21 includes both the metal film 15 and the screen mesh 17.

The space portion surrounded by the metal film 15 is the ink passage space 24, and the portion of the screen mesh 17 whose position overlaps with the ink passage space 24 in the plane direction in which the screen mesh 17 spreads is the mesh transmission overlapping portion 25. .. In other words, the mesh transmission overlapping portion 25 is arranged in the ink passage space 24. The mesh transmission overlapping portion 25 is covered with a plating film 18.

Of the screen mesh covering body 13 composed of the screen mesh 17 and the plating film 18, the portion where the position overlaps with the ink passing space 24 in the surface direction in which the screen mesh 17 spreads is the covering material transmission overlapping portion 26. In other words, the covering material transmission overlapping portion 26 is arranged in the ink passage space 24, and is composed of the mesh transmission overlapping portion 25 of the screen mesh 17 and the plating film 18 covering the mesh transmission overlapping portion 25.

The plate film portion 21, the ink passing space 24, and the covering transparent overlapping portion 26 of the screen mesh covering body 13 form an image forming portion 27 that forms an image on the printed matter. The surface of the image forming portion 27 on the squeegee side is composed of the surface of the metal film 15 on the squeegee side and the surface of the screen mesh covering 13 on the squeegee side of the covering transparent overlapping portion 26, all of which are made of plated metal. It has become. As shown in FIG. 1, the screen mesh covering body 13 has a support portion 28 that is outside the image forming portion 27 and is arranged between the image forming portion 27 and the plate frame material 12. The screen mesh 17 shown in FIG. 2 constituting the screen mesh covering body 13 includes a portion to be attached to the plate frame material 12 shown in FIG. 1, a portion included in the support portion 28, and a mesh metal film overlap shown in FIG. It is composed of a portion 20 and a mesh transmission overlapping portion 25.

The screen mesh 17 is embedded in the metal film 15 so as to be biased to one side in the thickness direction of the metal film 15. The front surface on the side closer to the screen mesh 17 in the thickness direction of the plate film portion 21 is the front surface 21a, and the front surface on the side far from the screen mesh 17 is the back surface 21b. The front surface 21a and the back surface 21b are substantially parallel to each other. The front surface 21a is a squeegee surface arranged on the squeegee side on which the paste-like ink is imprinted at the time of printing, and the back surface 21b is a printing surface that comes into contact with the printed matter at the time of printing.

As shown in FIG. 3, the screen mesh 17 is surrounded on all sides by a wire rod 19 to form an opening 31, and the opening 31 penetrates the screen mesh 17 in the thickness direction. The metal film 15 is inserted into the opening 31 of the mesh metal film overlapping portion 20 of the screen mesh 17. On the other hand, the metal film 15 does not enter the opening 31 of the mesh transmission overlapping portion 25 of the screen mesh 17. The screen mesh 17 and the metal film 15 are integrated by the metal film 15 entering the opening 31 of the mesh metal film overlapping portion 20 of the screen mesh 17. The mesh transmission overlapping portion 25 is covered with a plating film 18 to form a covering body transmission overlapping portion 26. An opening 32, which is one size smaller than the opening 31, is formed by the plating film 18 in the coating material transmission overlapping portion 26. The opening 32 also penetrates the covering material transmission overlapping portion 26 in the thickness direction.

In the metal film 15, a portion of the screen mesh 17 that is inserted into the opening 31 of the mesh metal film overlapping portion 20 is a plating film portion 33 formed so as to cover the mesh metal film overlapping portion 20 of the screen mesh 17. .. The plating film portion 33 is formed with a recess 34, which is one size smaller than the opening 32 in the covering transparent overlapping portion 26, recessed from the squeegee side to the printed matter side. The recess 34 may not be formed. The metal film 15 is made of the same metal including the plating film portion 33. The plating film 18 is also made of the same metal as the metal film 15. The plating film portion 33 and the portion of the metal film 15 other than the plating film portion 33 may be formed of different metals. Further, the plating film portion 33 and the plating film 18 may be formed of different metals. Further, the plating film 18 and the portion of the metal film 15 other than the plating film portion 33 may be formed of different metals.

As shown in FIG. 4, the coating thickness T1 of the plating film portion 33 formed in the opening 31 of the mesh metal film overlapping portion 20 of the screen mesh 17 is inside the opening 31 of the mesh transmission overlapping portion 25 of the screen mesh 17. The thickness of the coating film 18 formed on the surface of the plating film 18 is larger than the thickness T2. The thicknesses T1 and T2 are the thicknesses from the outer peripheral surface of the wire rod 19 in the radial direction of the wire rod 19 constituting the screen mesh 17. The thickness T1 is the thickness from the outer peripheral surface of the wire rod 19 to the inner wall surface of the nearest recess 34, and the thickness T2 is the thickness from the outer peripheral surface of the wire rod 19 to the outer peripheral surface of the plating film 18.

As shown in FIG. 2, the plating film portion 33 formed by covering the mesh metal film overlapping portion 20 and the plating film 18 formed by covering the mesh transmission overlapping portion 25 are the tips on the squeegee side. The height position of the part is aligned. In other words, in the plating film portion 33, the tip surface 33a on the squeegee side is flush with the tip end portion on the squeegee side of the plating film 18 formed by covering the mesh transmission overlapping portion 25.

Here, of the plating film portion 33 formed on the mesh metal film overlapping portion 20 and the plating film 18 formed on the mesh transmission overlapping portion 25, at least the tip portion of the plating film portion 33 on the squeegee side is surface-polished. ing. Then, in this surface polishing, the height positions of the tip portions on the squeegee side of the plating film portion 33 formed on the mesh metal film overlapping portion 20 and the plating film 18 formed on the mesh transmission overlapping portion 25 are aligned. It is done in. Therefore, the tip surface 33a on the squeegee side of the plating film portion 33 is a flat surface and is a polished surface.

The tip surface 33a of the plating film portion 33 constitutes the surface 21a of the plate film portion 21. The front surface 21a of the plate film portion 21 constitutes the front surface of the image forming portion 27, and the back surface 21b of the plate film portion 21 constitutes the back surface of the image forming portion 27. The inner wall surface 15a of the metal film 15 at the boundary with the ink passing space 24 is a wall surface surrounding the ink passing space 24. The plate film portion 21 is a portion of the image forming portion 27 that restricts the passage of ink, and the passage of ink is prohibited.

The ink passage space 24 penetrates the plate film portion 21 from the front surface 21a side to the back surface 21b side in the thickness direction, and is a portion of the image forming portion 27 that allows ink to pass through. In other words, the ink passage space 24 allows ink to pass through. The ink passage space 24 is formed by being surrounded by the inner wall surface 15a of the metal film 15, and is formed in a shape corresponding to an image pattern printed on a printed matter, specifically, a shape similar to the image pattern. ..

As described above, the screen printing plate 11 is formed by integrating the screen mesh 17 and the metal film 15, and the ink passing space 24 having a shape corresponding to the image pattern is formed by being surrounded by the metal film 15. In the screen mesh 17, the portion where the position overlaps with the metal film 15 in the plane direction in which the screen mesh 17 spreads is the mesh metal film overlapping portion 20. In the screen mesh 17, the portion where the position overlaps with the ink passing space 24 in the plane direction in which the screen mesh 17 spreads is the mesh transmission overlapping portion 25. The position of the screen mesh 17 overlaps with the metal film 15 and the position of the screen mesh 17 also overlaps with the ink passing space 24 in the plane direction in which the screen mesh 17 spreads. In the screen mesh 17, a plating film 18 is formed on the entire surface of the mesh transmission overlapping portion 25.

On such a screen printing plate 11, ink placed on the surface 21a side of the plate film portion 21 is rubbed into the image forming portion 27 by a squeegee. Then, the ink passes through the ink passage space 24 from the front surface 21a side to the back surface 21b side in a state where the plate film portion 21 is restricted from passing from the front surface 21a on the squeegee side to the back surface 21b. At that time, the ink is separated by the covering transparent overlapping portion 26 of the screen mesh covering body 13 immediately after being introduced into the ink passing space 24, and then merges in the ink passing space 24 after passing through the covering transparent overlapping portion 26. Then, the image pattern in which the shape of the ink passing space 24 is transferred is printed on the printed matter arranged on the back surface 21b on the side opposite to the squeegee of the plate film portion 21.

Next, the manufacturing method of the screen printing plate 11 of the first embodiment will be described in order of steps.

First, as shown in FIG. 5A, a preparatory step is performed in which a conductive plate 102 made of stainless steel or the like is heat-bonded to one surface side of a dry film 101 made of a photosensitive resin material. Next, as shown in FIG. 5B, a first exposure step of arranging the photomask 105 on the side of the dry film 101 opposite to the conductive plate 102 and exposing the dry film 101 from the side opposite to the conductive plate 102. I do. By performing this first exposure step, the pattern 107 is cured and formed on the dry film 101 by the translucent portion 106 of the photomask 105.

Then, by performing the first removing step of developing the dry film 101, as shown in FIG. 5C, only the pattern 107 made of the cured photosensitive resin material among the photosensitive resin materials is placed on the conductive plate 102. leave. Next, as shown in FIG. 5D, a first plating step of plating nickel or the like is performed using the conductive plate 102 as an electrode. In this first plating step, the metal film 15A is formed on the conductive plate 102 so as to surround the pattern 107 so that the height is lower than the film thickness of the final plate film portion 21 by a predetermined position. The surface of the metal film 15A that comes into contact with the conductive plate 102 is the back surface 21b described above. The metal film 15A has a shape around the pattern 107. In other words, the metal film 15A has an inverted shape of the pattern 107.

Next, a first polishing step is performed in which the protruding portion of the pattern 107 of the photosensitive resin material from the metal film 15A is surface-polished and removed as shown in FIG. 6A. In the first polishing step, the surface of the pattern 107 and the metal film 15A opposite to the conductive plate 102 is flush with each other. Next, as shown in FIG. 6B, a second plating step is performed in which the metal screen mesh 17 is brought into close contact with the surface of the pattern 107 and the metal film 15A opposite to the conductive plate 102 to perform the plating treatment. By this second plating step, as shown in FIG. 6C, the screen mesh 17 and the metal film 15A are integrated with the same metal plating film 18A as the metal film 15A, and the screen mesh 17 is formed with the plating film 18A. An intermediate 11A having a coated screen mesh coating 13A is formed. The screen mesh 17 is made of a conductive metal material, for example, stainless steel. Tungsten alloy may be used instead of stainless steel. In the second plating step, the screen mesh 17 and the metal film 15A may be integrated with a metal plating film 18A different from the metal film 15A to form the intermediate body 11A.

Next, a second removing step of removing the conductive plate 102 and the pattern 107 is performed. As a result, the portion from which the pattern 107 made of the photosensitive resin material has been removed becomes an ink passage space 24A corresponding to the image pattern, which is surrounded by the inner wall surface 15Aa of the metal film 15A. Here, in order to facilitate the peeling of the conductive plate 102 from the metal film 15A, the conductive plate 102 is made of a stainless steel plate and the metal film 15A is made of nickel to suppress adhesion during plating.

In the intermediate body 11A, the portion of the screen mesh covering body 13A whose position overlaps with the metal film 15A in the plane direction in which it spreads is the covering metal film overlapping portion 131. Further, in the screen mesh covering body 13A, the portion where the position overlaps with the ink passing space 24A in the plane direction in which the covering body 13A spreads becomes the covering body transmission overlapping portion 26 described above. Of the screen mesh 17, the portion where the position overlaps with the metal film 15A in the plane direction in which it spreads becomes the above-mentioned mesh metal film overlapping portion 20, and the portion where the position overlaps with the ink passage space 24A becomes the above-mentioned mesh transmission overlapping portion 25. Become. In the intermediate 11A, the back surface 21b side of the metal film 15A is the printed matter side, and the screen mesh covering 13A side is the squeegee side.

The above-mentioned second plating step and second removal step are integrated plating steps in which the metal film 15A and the screen mesh 17 formed by surrounding the ink passing space 24A according to the image pattern are integrated by the plating film 18A. ing. By the integrated plating step, an intermediate 11A having a screen mesh coating body 13A formed by coating the screen mesh 17 with a plating film 18A is formed. The screen mesh 17 is also covered with the plating film 18A inside the opening 31 shown in FIG. In the plating film 18A, the portion of the screen mesh 17 that covers the mesh transmission overlapping portion 25 becomes the plating film 18. The screen mesh covering body 13A has the opening 32 shown in FIG. 3 inside the plating film 18A covering the opening 31. The opening 31 of the screen mesh 17 is not blocked by the plating film 18A by the integrated plating process.

Next, as shown in FIG. 7A, a coating step of applying the photosensitive resin material 121 (photosensitive material) to the intermediate 11A is performed. At that time, the photosensitive resin material 121 is applied to the ink passage space 24A, the back surface 21b side of the metal film 15A, that is, the printed matter side, and the squeegee side of the metal film 15A and the screen mesh coating 13A. At this time, the photosensitive resin material 121 is also applied to the screen mesh covering body 13A in the opening 32 shown in FIG. 3 penetrating in the thickness direction thereof. Of the screen mesh covering 13A, the opening 32 in the covering metal film overlapping portion 131 overlapping the metal film 15A and the opening 32 in the covering transparent overlapping portion 26 overlapping the ink passage space 24A in the spreading surface direction are all. It is closed with the photosensitive resin material 121.

As shown in FIG. 7A, a second exposure step is performed in which the intermediate 11A coated with the photosensitive resin material 121 is exposed from the back surface 21b side of the metal film 15A, that is, the printed matter side. By performing this second exposure step, FIG. 7B shows that the intermediate body 11A was exposed and cured on the back surface 21b side, the ink passing space 24A, and the extension of the ink passing space 24A toward the squeegee side. The photosensitive material layer 123 shown is formed.

Next, a third removal step (coating step) for developing the photosensitive resin material 121 is performed. As a result, of the photosensitive resin material 121, only the cured photosensitive material layer 123 is left as shown in FIG. 7B, and the other uncured photosensitive resin material 121 is removed. The photosensitive material layer 123 has a back surface covering portion 125 that covers the back surface 21b of the metal film 15A, and a pattern 126 that fills the ink passage space 24A and extends on the extension thereof. In the screen mesh covering body 13A after the third removal step, the opening 32 of the portion where the position overlaps with the pattern 126 is closed in the spreading surface direction, and the opening 32 of the portion where the position does not overlap with the pattern 126 is opened. doing. The opening 32 in the pattern 126 of the screen mesh covering 13A later becomes the opening 32 of the covering transparent overlapping portion 26.

In the above coating step, the second exposure step, and the third removal step, the photosensitive resin material 121 is coated on the intermediate body 11A, and the photosensitive resin material 121 is exposed and developed from the printed matter side of the intermediate body 11A. By doing so, a coating that forms a photosensitive material layer 123 on the printed matter side of the metal film 15A, the ink passing space 24A, and the covering material transmission overlapping portion 26 whose positions overlap with the ink passing space 24A of the screen mesh covering body 13A. It is a process.

Next, the intermediate body 11A is plated with the same metal as the metal film 15A using the screen mesh 17 as an electrode to grow and expand the metal film 15A toward the squeegee side, as shown in FIG. 7 (c). A third plating step (reinforced plating step) for forming the metal film 15B is performed. In the third plating step, as shown in FIG. 7 (c), the coating metal film overlapping portion 131 of the screen mesh covering body 13A in which the photosensitive material layer 123 is not formed as shown in FIG. 7 (b) is formed. The plating film portion 33B, which is a part of the metal film 15B, is formed. The metal film 15B after the third plating step has a shape around the pattern 126. In other words, in the third plating step, by forming the metal film 15B, the portion of the intermediate 11A other than the photosensitive material layer 123 on the squeegee side is filled with the plating film portion 33B of the metal film 15B which is the plating film. In the third plating step, the plating film portion 33B may be formed by subjecting the intermediate 11A to a metal plating treatment different from that of the metal film 15A.

When the metal film 15A and the plating film 18A are the same metal, in the third plating step, the intermediate body 11A is plated with the same metal as the metal film 15A and the plating film 18A to form the plating film portion 33B. You may. When the metal film 15A and the plating film 18A are the same metal, the intermediate body 11A is plated with a metal different from the metal film 15A and the plating film 18A in the third plating step, so that the plating film portion is formed. 33B may be formed. When the metal film 15A and the plating film 18A are different metals, in the third plating step, the intermediate body 11A is plated with a metal different from both the metal film 15A and the plating film 18A to form the plating film portion. 33B may be formed. When the metal film 15A and the plating film 18A are different metals, the intermediate body 11A is plated with the same metal as the metal film 15A to form the plating film portion 33B in the third plating step. Is also good. Further, when the metal film 15A and the plating film 18A are different metals, in the third plating step, the intermediate body 11A is plated with the same metal as the plating film 18A to form the plating film portion 33B. Is also good.

By this third plating step, in the metal film 15B which is a plating film, the plating film portion 33B which is a part thereof is not embedded in the pattern 126 of the screen mesh coating film 13A shown in FIG. 7B. It enters the opening of the film overlapping portion 131. At that time, the plating film portion 33B is formed by integrating the plating with the plating film 18A that was present in the covering metal film overlapping portion 131 and further expanding to the periphery. As a result, the plating film portion 33B is formed so as to further narrow the opening 31 of the screen mesh 17 at the position of the covering metal film overlapping portion 131 shown in FIG. 7 (b).

In this third plating step, as shown in FIG. 7B, the coating material transmission overlapping portion 26 embedded in the pattern 126 of the screen mesh coating body 13A forms the pattern 126, and the non-conductive photosensitive portion 26 is formed. Since it is covered with a sex material, no plating film is formed, and no plating film is formed in the opening 32. Therefore, as shown in FIG. 3, the opening 32 of the covering transparent overlapping portion 26, in other words, the opening 31 of the mesh transparent overlapping portion 25, is not narrower than before. Here, nickel is electrolytically plated. In addition to nickel, nickel alloy, copper, chromium, tin, iron and the like may be plated.

By this third plating step, in the screen mesh covering body 13A shown in FIG. 7B, the plating film 18A of the covering metal film overlapping portion 131 becomes a part of the metal film 15B, and is shown in FIG. 7C. The final screen mesh covering 13 is obtained. The portion of the metal film 15B after the third plating step surrounded by the inner wall surface 15Ba becomes an ink passage space 24B.

Next, a fourth removal step (removal step) for removing the photosensitive material layer 123 is performed. In the fourth removing step, the photosensitive material layer 123 is peeled off from the metal film 15B and the covering transparent overlapping portion 26 of the screen mesh covering body 13 to be removed. In this fourth removing step, the photosensitive material layer 123 may be dissolved with a solvent or the like.

Next, a second polishing step (polishing step) is performed in which the plating film portion 33B after the third plating step is flat-polished from the squeegee side. By performing this second polishing step, as shown in FIG. 2, the plating film portion 33B makes the tip surface 33a on the squeegee side flush with the tip end portion on the squeegee side of the covering permeation overlapping portion 26. It becomes 33. In other words, the plating film portion 33B becomes flush with the tip portion on the squeegee side of the plating film 18 formed by covering the mesh transmission overlapping portion 25 to form the plating film portion 33. Further, by performing this second polishing step, the metal film 15B including the inner wall surface 15Ba and the plating film portion 33B shown in FIG. 7C includes the inner wall surface 15a and the plating film portion 33 as shown in FIG. It becomes the metal film 15. As a result, the ink passing space 24B shown in FIG. 7C becomes the ink passing space 24 shown in FIG. In this second polishing step, surface polishing is performed within a range in which the screen mesh 17 is not exposed to the outside.

In this way, as shown in FIG. 2, the screen mesh 17 and the metal film 15 are integrated, and the ink passage space 24 corresponding to the image pattern is formed by being surrounded by the inner wall surface 15a of the metal film 15. The screen printing plate 11 is manufactured. As shown in FIGS. 3 and 4, the screen printing plate 11 has a thickness T1 of a plating film portion 33 formed in the opening 31 of the mesh metal film overlapping portion 20 whose position overlaps with the metal film 15 of the screen mesh 17. However, it is thicker than the thickness T2 of the plating film 18 formed in the opening 31 of the mesh transmission overlapping portion 25 whose position overlaps with the ink passage space 24 of the screen mesh 17.

In the screen printing plate 11 of the first embodiment described above, the thickness T1 of the plating film portion 33 formed in the opening 31 of the mesh metal film overlapping portion 20 whose position overlaps with the metal film 15 of the screen mesh 17 is The thickness of the plating film 18 formed in the opening 31 of the mesh transmission overlapping portion 25 whose position overlaps with the ink passage space 24 of the screen mesh 17 is larger than the thickness T2. Therefore, the strength of the plate film portion 21 can be improved by the thick-walled plating film portion 33 while suppressing the deterioration of the ink ejection property in the ink passage space 24. As a result, the strength of the image forming unit 27 can be improved.

Further, the screen printing plate 11 has a metal screen mesh 17, a plating film 18, and a metal film 15, and is surrounded by the metal film 15 to form an ink passage space 24 according to an image pattern. Excellent solvent resistance, dimensional stability, durability and smoothness of printed surface.

Further, in the screen printing plate 11, the plating film portion 33 formed on the mesh metal film overlapping portion 20 and the plating film 18 formed on the mesh transmission overlapping portion 25 align the height positions of the tip portions on the squeegee side. Therefore, the squeegee can be moved smoothly during printing. Therefore, the life of the squeegee can be improved.

Further, since the tip portion of the plating film portion 33 formed on the mesh metal film overlapping portion 20 on the squeegee side is polished to form the tip surface 33a on the squeegee side, the squeegee can be moved more smoothly during printing. be able to. Therefore, the life of the squeegee can be further improved.

As shown in FIG. 6C, the method for manufacturing the screen printing plate 11 of the first embodiment is an integrated plating step including a second plating step and a second removal step, and as shown in FIG. 6C, an ink passing space 24A corresponding to an image pattern is used. The metal film 15A and the screen mesh 17 formed by surrounding the screen mesh 17 are integrated with the plating film 18A to form an intermediate 11A having the screen mesh covering body 13A formed by coating the screen mesh 17 with the plating film 18A.

Then, as shown in FIG. 7A, the photosensitive resin material 121 is applied to the intermediate 11A by the coating step including the coating step, the second exposure step, and the third removal step, and the photosensitive resin material 121 is exposed. As shown in FIG. 7B, the position of the metal film 15A overlaps with the ink passing space 24A and the ink passing space 24A of the screen mesh covering body 13A. A cured photosensitive material layer 123 is formed on the portion 26.

Next, as shown in FIG. 7 (c), the coating metal film overlapping portion 131 whose position overlaps with the metal film 15A of the screen mesh coating film 13A on which the photosensitive material layer 123 is not formed is subjected to the third plating step. The plating film portion 33B is formed on the surface. Then, the thickness of the plating film portion 33B in the opening 31 of the mesh metal film overlapping portion 20 without the photosensitive material layer 123 becomes thicker, while the thickness inside the opening 31 of the covering transparent overlapping portion 26 with the photosensitive material layer 123 increases. The thickness of the plating film 18 formed on the surface does not increase.

Then, the photosensitive material layer 123 is removed by the fourth removing step. As a result, as shown in FIGS. 3 and 4, the thickness T1 of the plating film portion 33 formed in the opening 31 of the mesh metal film overlapping portion 20 of the screen mesh 17 becomes the mesh transmission overlapping portion 25 of the screen mesh 17. A screen printing plate 11 thicker than the thickness T2 of the plating film 18 formed in the opening 31 of the above can be easily manufactured.

Further, as shown in FIG. 7A, the photosensitive resin material 121 is applied to the intermediate body 11A by the coating step, and the photosensitive resin material 121 is exposed from the side to be printed on the intermediate body 11A for development. The metal film 15A serves as an exposure mask to prevent a cured photosensitive material layer from being formed on the covering metal film overlapping portion 131 of the screen mesh covering body 13A. Therefore, the coating process can be performed efficiently. That is, as shown in FIG. 7 (c), the coating metal film overlapping portion 131 of the screen mesh covering body 13A in which the photosensitive material layer is not formed as shown in FIG. 7 (b) is subjected to the third plating step. In order to form the plating film portion 33B, it is necessary not to form a cured photosensitive material layer on the covering metal film overlapping portion 131 in the coating step, but in the coating step, the photosensitive resin material 121 is formed. Since the intermediate body 11A is exposed and developed from the side to be printed, the metal film 15A can be used as an exposure mask to prevent the cured photosensitive material layer from being formed on the covering metal film overlapping portion 131. After coating the photosensitive resin material 121 on the intermediate body 11A as shown in FIG. 7A by the coating step, an exposure mask for masking the covering metal film overlapping portion 131 is arranged on the squeegee side. The exposure may be performed from. In this case, since an extra step of arranging the exposure mask is required, it is preferable to expose the photosensitive resin material 121 from the printed matter side of the intermediate 11A as in the first embodiment.

Further, as shown in FIG. 7C, since the polishing step of polishing the plating film portion 33B formed in the third plating step from the squeegee side is included, the tip surface 33a of the plating film portion 33B shown in FIG. 2 is polished. Can be a face. Therefore, the squeegee can be moved more smoothly during printing, so that the life of the squeegee can be improved.

Further, when the third plating treatment is performed, the conductive screen mesh 17 is used as an electrode for the plating treatment, so that the metal film 15 is surely inserted into the opening 31 of the mesh metal film overlapping portion 20 of the screen mesh 17. The bonding strength between the metal film 15 and the screen mesh 17 can be further improved.

[Second Embodiment]
The screen-printed plate of the second embodiment and the method for manufacturing the screen-printed plate according to the present invention will be described below with reference to mainly FIGS. 8 to 10 and focusing on differences from the first embodiment.

In the screen printing plate 11 of the second embodiment, as shown in FIG. 8, in the plating film portion 33 formed on the mesh metal film overlapping portion 20, the portion formed on the tip portion of the screen mesh 17 on the squeegee side is other than the portion. It is a protruding portion 151 that protrudes toward the squeegee side from the base portion 150 of the above.

In the screen printing plate 11 of the second embodiment, the tip portion on the squeegee side is formed in both the plating film portion 33 formed on the mesh metal film overlapping portion 20 and the plating film 18 formed on the mesh transmission overlapping portion 25. Is not polished. Therefore, the tip surface 33a of the plating film portion 33 is not a polished surface.

Next, the manufacturing method of the screen printing plate 11 of the second embodiment will be described in order of steps.

Similar to the first embodiment, the preparation step (see FIG. 5 (a)), the first exposure step (see FIG. 5 (b)), the first removal step (see FIG. 5 (c)), and the first plating step (see FIG. 5 (c)). FIG. 5 (d)), first polishing step (see FIG. 6 (a)), second plating step (see FIG. 6 (b)), second removing step (see FIG. 6 (c)), coating step (see FIG. 6 (c)). An intermediate having a cured photosensitive material layer 123 formed by performing a second exposure step (see FIG. 7 (a)) and a third removal step (see FIG. 7 (b)). Form 11A.

In the second embodiment, next, as shown in FIG. 9, an additional coating step (tip coating step) is performed on the intermediate 11A. In the additional coating step, the photosensitive resin material or the like is formed only on the squeegee-side surface in the thickness direction with respect to the coating metal film overlapping portion 131 of the screen mesh covering body 13A whose position overlaps with the metal film 15A in the plane direction in which it spreads. The plating resist material 121C of is applied. In this additional coating step, the plating resist material 121C is not applied to the surface of the metal film 15A on the squeegee side. Moreover, when the plating resist material 121C is applied to the squeegee side of the screen mesh covering body 13A in this way, the opening 32 of the covering metal film overlapping portion 131 is plated so as to penetrate in the thickness direction of the screen mesh covering body 13A. The resist material 121C is applied. In other words, the plating resist material 121C is applied so as not to block the opening 32 of the covering metal film overlapping portion 131.

Next, as shown in FIG. 10, an additional exposure step (tip coating step) is performed to expose the intermediate 11A coated with the plating resist material 121C from the squeegee side. By performing this additional exposure step, a plating resist layer 123C made of an exposed and cured photosensitive material layer is formed only on the squeegee side in the thickness direction of the coating metal film overlapping portion 131 of the screen mesh covering body 13A. NS. Next, an additional removal step (tip coating step) for developing the photosensitive resin material 121 is performed. As a result, the photosensitive material layer 123 and the plating resist layer 123C remain in the intermediate 11A. The plating resist layer 123C is formed so as not to block the opening 32 of the covering metal film overlapping portion 131. The plating resist layer 123C may be formed of, for example, a material that is cured by heat drying, in addition to being formed by applying a photosensitive resin material as the plating resist material 121C and exposing it from the squeegee side. However, in order to satisfactorily form the plating resist layer 123C only on the squeegee side in the thickness direction of the coating metal film overlapping portion 131 of the screen mesh covering body 13A, a photosensitive resin material is applied as the plating resist material 121C and the squeegee is applied. It is preferable to expose the plating resist layer 123C from the side.

The above additional coating step, additional exposure step, and additional removal step are performed in a tip coating step of coating the tip of the screen mesh coating 13A on the squeegee side with the plating resist layer 123C before the third plating step. It has become.

Next, the same third plating step as in the first embodiment is performed. Then, the metal film 15A shown in FIG. 10 grows in the range up to the plating resist layer 123C to become the metal film 15 shown in FIG. In other words, the plating film portion 33 is formed in the mesh metal film overlapping portion 20 in the range up to the plating resist layer 123C. By forming such a plating film portion 33 on the mesh metal film overlapping portion 20, the plate film portion 21 of the second embodiment is formed on the tip portion of the screen mesh 17 on the squeegee side as shown in FIG. The formed portion becomes a protruding portion 151 that protrudes toward the squeegee side with respect to the other base portion 150. Here, the protruding portion 151 is configured such that the plating film 18A of the screen mesh covering body 13A shown in FIG. 10 remains.

By the third plating step of the second embodiment, the metal film 15 which is the plating film shown in FIG. 8 is embedded in the pattern 126 of the screen mesh coating film 13A shown in FIG. 10 by the plating film portion 33 which is a part thereof. It enters the printed matter side in the opening 32 of the uncoated metal film overlapping portion 131. At that time, the plating film portion 33 shown in FIG. 8 is integrated with the plating film 18A that was present in the covering metal film overlapping portion 131 shown in FIG. As a result, the plating film portion 33 is formed so as to further narrow the opening 31 of the screen mesh 17 at the position of the covering metal film overlapping portion 131. Therefore, also in the screen printing plate 11 of the second embodiment, the coating thickness T1 of the plating film portion 33 formed in the opening 31 of the mesh metal film overlapping portion 20 of the screen mesh 17 is transparent to the mesh of the screen mesh 17. The thickness of the coating of the plating film 18 formed in the opening 31 of the overlapping portion 25 is larger than the thickness T2.

Next, a fourth removal step (removal step) similar to that of the first embodiment is performed. In the second embodiment, the second polishing step of the first embodiment is not performed.

According to the screen printing plate 11 of the second embodiment described above, in the plating film portion 33 of the mesh metal film overlapping portion 20, the portion formed at the tip end portion of the screen mesh 17 on the squeegee side is larger than that of the other base portion 150. Since the projecting portion 151 projects toward the squeegee side, the film thickness of the base portion 150 other than the projecting portion 151 of the image forming portion 27 can be reduced.

In the method for manufacturing the screen printing plate 11 of the second embodiment, since the tip portion of the screen mesh coating body 13A on the squeegee side is coated with the plating resist layer 123C before the third plating step, the tip portion coating step is included. The portion formed at the tip of the screen mesh 17 of the plating film portion 33 on the squeegee side can be easily formed as a protruding portion 151 that protrudes toward the squeegee side of the other base portion 150 of the plating film portion 33.

In the second embodiment, the tip coating step may be performed before the third plating step, for example, in the thickness direction of the screen mesh 17 before the second plating step (see FIG. 6B). The same plating resist layer 123C as described above may be formed on only one side. Then, in the second plating step, the screen mesh 17 on which the plating resist layer 123C is formed is plated by bringing the plating resist layer 123C into close contact with the pattern 107 and the metal film 15A in the direction opposite to the conductive plate 102. Perform processing. In this case, the tip coating step is a step of coating the tip of the screen mesh 17 on the squeegee side with the plating resist layer 123C before the third plating step.

In this way, as shown in FIG. 11, the screen printing plate 11 has an unplated non-plated portion 155 at the tip end portion of the screen mesh 17 on the squeegee side. In this case, the non-plated portion 155 becomes a protruding portion that protrudes toward the squeegee side from the plating film portion 33, which is another portion. As a result, the actual film thickness of the image forming portion 27 can be reduced.

In the first and second embodiments, the support 14 is not only a gauze product in which a screen mesh 17 which is a metal woven fabric is attached to a plate frame material 12 in a tense state, for example, is thin on the entire surface. A screen mesh 17 which is a thin metal plate having holes formed on the plate frame material 12 can be used. Further, in the support 14, a support mesh made of a synthetic resin such as polyester is stretched on a metal plate frame material 12, and a screen mesh made of a metal such as stainless steel is stretched on the center side of the support mesh. It may be a combination mask.

11 Screen printing plate 11A Intermediate 13 Screen mesh coating 15 Metal film 17 Screen mesh 18, 18A Plating film 20 Mesh metal film Overlapping part 24, 24A Ink passage space 25 Mesh transparent overlapping part 26 Coating transparent overlapping part 31 Opening 33 Plating Film part 121 Photosensitive resin material 123 Photosensitive material layer 123C Plating resist layer 131 Coating metal film Overlapping part 151 Protruding part 155 Non-plated part T1, T2 Thickness

Claims (5)

A screen printing plate in which a screen mesh and a metal film are integrated and surrounded by the metal film to form an ink passage space according to an image pattern.
The thickness of the plating film portion formed in the opening of the mesh metal film overlapping portion whose position overlaps with the metal film of the screen mesh is within the opening of the mesh transmission overlapping portion whose position overlaps with the ink passage space of the screen mesh. rather thick than the thickness of the formed plating film, the
The plating film portion formed on the mesh metal film overlapping portion and the plating film formed on the mesh transmission overlapping portion align the height positions of the tip portions on the squeegee side.
A screen printing plate characterized in that the tip portion on the squeegee side of the plating film portion formed on the mesh metal film overlapping portion is polished. A metal film formed by surrounding an ink passage space according to an image pattern and a screen mesh are integrated with a plating film, and an intermediate body having a screen mesh coating body in which the screen mesh is coated with the plating film is formed. Chemical plating process and
By applying a photosensitive material to the intermediate and exposing and developing the photosensitive material, the ink passage space and the coating material transmission overlapping portion whose positions overlap in the ink passage space of the screen mesh coating material are formed. A coating process to form a cured photosensitive material layer,
A reinforced plating step of forming a plating film portion at an overlapping portion of the coating metal film whose position overlaps with the metal film of the screen mesh coating body on which the photosensitive material layer is not formed, and a step of forming a plating film portion.
The removal step of removing the photosensitive material layer and
A method for manufacturing a screen printing plate, which comprises. The method for producing a screen-printed plate according to claim 2 , wherein the coating step is to apply a photosensitive material to the intermediate and expose the photosensitive material from the side to be printed on the intermediate to develop the intermediate. .. The method for manufacturing a screen printing plate according to claim 2 or 3 , further comprising a polishing step of polishing the plating film portion formed on the covering metal film overlapping portion from the squeegee side in the reinforcement plating step. The screen according to claim 2 or 3 , further comprising a tip coating step of coating the screen mesh coating or the tip of the screen mesh on the squeegee side with a plating resist layer before the reinforcement plating step. How to make a printing plate.

Images