JPH0410991A - Flexure printing plate - Google Patents

Abstract

PURPOSE:To enhance the flexibility of a printing plate by covering a part or all of an ink passing hole having a desired pattern shape with a mesh and using no fixing frame surrounding four peripheries with respect to a plate film using a material hard to deform against the tensile force in its surface direction and flexibility against bending. CONSTITUTION:A part of the ink passing hole of a plate film is covered with a mesh. At this time, a metal plate having an ink passing hole is prepared and a base glass plate 10 matched with the shape of the ink passing hole 33 is ground and subjected to photoetching to form mesh like grooves 101. A metal is precipitated on this glass plate and the metal film remaining on the flat surface part of the glass plate is removed by rubbing to leave the metal only in the mesh like grooves 101. Next, a metal is flocculated on the residual metal film by electroplating and, thereafter, the base glass plate 10 is peeled off from the metal left in the grooves and the flocculated metal. By this method, the metal mesh bonded to a metal plate is formed to the ink passing hole.

Description

DETAILED DESCRIPTION OF THE INVENTION Field and Object of the Invention The present invention relates to a screen printing plate applicable to improved screen printing machines that have already been proposed in the field of screen printing.

The screen printing plates conventionally used are the first (a)
) As shown in the figure, the screen mesh is fixed by four peripheries, and the screen mesh supports a metal plate having ink permeation holes, or the first (b)
As shown in the figure, it had a configuration in which a metal plate having ink permeation holes was fixed by four fixing frames.

As shown in FIG. 2, these conventional screen printing plates fix a screen printing mesh and a printing plate in a shallow ark-shaped frame, and form a desired pattern onto the mesh by optical or physical methods. Ink was placed on the screen printing plate and printed by applying pressure with a squeegee.

In a printing plate that supports a metal plate through a mesh shown in FIG. 1 (a), during printing, the mesh is forcibly pressed against the substrate 6 by the squeegee 2 as shown in FIG. 3 (a). On the other hand, when printing is not being performed, the mesh and printing plate are required to be separated from the printing substrate 6, as shown in FIG. It was required that the length of the mesh and printing plate in the surface direction be different between when printing and when not printing.

However, this expansion and contraction of the screen in the surface direction means that the screen printing plate itself gradually stretches as the number of printing increases, causing dimensional errors in the printed pattern.
Furthermore, even after printing is completed, the screen printing plate does not separate sufficiently from the surface of the printing medium (so-called printing plate separation failure).

On the other hand, even during printing as shown in FIG. 3(a), as the squeegee moves to the edge of the printing medium, the squeegee is located at the edge, compared to the case where it is located at the center of the mesh and printing plate. (This point is compared to when the squeegee is located in the center.)
It is clear from the fact that the length of the mesh becomes longer when the squeegee is located at the edge), and the mesh becomes larger near the edge of the printing plate, which is due to uneven density of the ink. It causes

Also, as the squeegee moves to one end, the snap-off angle between the screen and the printing material (maximum 3 (in Figure 81, α is ) gradually became smaller, making it difficult for ink to pass through compared to the center of the printing material, and this change in angle also caused uneven ink density on the printing material. .

In a screen printing plate in which a metal plate with a desired pattern is directly fixed by a fixing frame as shown in Fig. 1(b), the printing plate is brought into full contact with the substrate as shown in Fig. 4. , the squeegee can be scanned over a flat printing plate, or the squeegee 2 can be used to scan a metal plate as shown in FIG. A method was used in which the plate was forcibly pressed against the printing material 6.

However, in the contact method shown in Figure 4, the printing plate does not separate from the printing material even after the squeegee scans, so the ink remaining on the ink permeation holes gradually penetrates into the printing material. Clear printing cannot be obtained due to ink stains in the border area, etc.
Furthermore, when the printing method shown in Figure 3(a) is used for a metal plate, the metal plate is forcibly stretched with a squeegee, even though the metal plate itself is difficult to stretch when pulled in the plane direction. As a result, the metal plate may be damaged or the fixing frames in both directions may be deformed, and as the number of printing increases, the shape of the ink permeation holes will be deformed, making precise printing impossible.

In order to improve this problem, as shown in Figure 5, at the tip P of the squeegee, the screen on the side opposite to the ink holding side is set so that the snap-off angle α is constant. Providing a guide 11 in which the end portion A moves, or as shown in FIG. In order to keep the snap-off angle α constant, guides 11 and 12 are provided so that the ends A and E of the screen move, and as shown in FIG. It was invented to move the screen along a linear guide at the opposite end of the screen, and to make it reversibly movable along with the movement of the squeegee at the other end of the screen, which has already been compared to the Imperial Palace. .

In these improved screen printing machines, both ends of the printing plate are movable, so it is not necessary to expand and contract in the surface direction like the conventional printing plate, but it also eliminates the drawbacks mentioned above. This is a negative point in that it causes

On the other hand, since the screen printing plate is pressed against the printing surface by a moving squeegee, flexibility is required, no different from the conventional case.

Thus, in the improved screen printing machine as described above, it is essential to use a screen printing plate that is not easily deformed by tensile force in the in-plane direction, and at the same time has flexibility. However, printing that uses such a screen printing plate and is performed while moving the edges of the screen printing plate has already been defined as "flexure printing."

The object of the present application is to provide a flexure printing plate that can be applied to such flexure printing.

(Means for Solving the Problems) In order to obtain such a printing plate, the configuration of the present invention is to cover part or all of the ink permeation holes in the desired pattern shape with a mesh, and to apply tension in the plane direction. It consists of a printing plate for flexure printing, which is characterized by the fact that it does not use a fixed frame surrounding the four peripheries, and the plate film is made of a material that is flexible against bending.

This will be explained in detail below.

In screen printing, a mesh is provided in the printing permeability hole when there is an isolated part 31 of the metal plate surrounded by the ink permeation hole 33 as shown in FIG. It is necessary to join the isolated parts with the mesh 32 (on the contrary, if the mesh 32 is not used, the isolated metal plate part 31 will come off and this part will also become an ink permeation hole) ■If the area of the ink permeation hole is large, a large amount of ink will permeate through this area, penetrating the surface of the printing substrate, making the ink concentration too high, and penetrating within the boundaries of the ink permeation hole. This is due to the appearance of ink stains with unclear boundaries on the printing substrate.

In claim (1), the phrase "a part or all of the ink permeable holes are covered by a mesh" means that all of the several ink permeable holes present in the printing plate are This is because it is not always necessary to cover with a mesh based on (2), and it is sufficient to cover with a mesh as necessary.

By the way, metal plates or synthetic resin plates can be used as printing plates that can be applied to flexure printing because they have characteristics that make them difficult to deform under tensile forces in the plane direction and are flexible when bent. A plate whose surface is plated with metal may be considered.

In the present application, a part of the ink permeation holes of such a plate film is covered by a mesh, but there are various embodiments of manufacturing methods for such a combination of a plate film and a mesh.

Example 1 The example shown in FIG. 9(a) is obtained by a method in which a metal plate having ink permeation holes is prepared in advance and a mesh is formed in the ink permeation holes to be joined to the metal plate.

Specifically, the following steps are taken: 1. Prepare a base glass lO that matches the shape of the ink permeation holes 33, polish it, and form mesh-like grooves 101 on the glass by photo-etching. 2. Deposition ■Remove the metal film remaining on the flat part of the glass by rubbing, leaving only the mesh-shaped groove 101 with metal ■Concentrate further metal in the remaining metal film by electrolytic plating ■Add metal to the groove Base glass lO from remaining metal and agglomerated metal
A metal mesh is formed in the ink permeation hole to be bonded to the metal plate by the process of peeling off the metal plate.

In this case, as shown in FIG. The mesh itself can be designed to allow the ink to pass through without coming into contact with the printed material even when the squeegee moves.

Example 2 The example of the manufacturing method shown in FIG. 9(b) is a printing plate obtained by forming the mesh in the ink permeation holes and the plate portion of the metal plate surrounding the ink permeation holes at one time. shows.

That is, in this case, the process shown in FIG. 9(a) is applied not only to the mesh but also to the metal plate.

The specific work process is as follows: Prepare a base glass, polish it, and 1. Create mesh-like grooves 101 by photo-etching at positions corresponding to the meshes in the ink permeation holes 33.
A plate-shaped recess 102 is provided at a position corresponding to the plate portion of the metal plate. ■Metal is deposited on the entire base glass.■The upper part of the deposited metal film is removed by rubbing, and the groove 101 portion and Hollow 1 corresponding to the plate part of the metal plate
Leave the metal only in the 02 part. ■ Make the remaining metal further aggregate by electroplating, and join the remaining metal film and the metal aggregated in the mesh shape. ■ Formed in this way. The mesh portion 32 and the metal plate portion 31 are peeled off from the base.

Through the above steps, the mesh and the plate portion of the metal plate can be uniformly formed.

Embodiment 3 In the embodiment shown in FIGS. 9(c) and 9(d), a metal plate having ink permeable holes 33 and a mesh 32 are prepared in advance as independent materials, and the results are obtained by joining them. Shows a printing plate.

Specifically, it is sufficient to prepare a metal plate having ink permeable holes and a mesh separately in advance, and then join them together by electrolytic plating.

In this case, the mesh prepared in advance has a size and shape that can cover the ink permeation hole pattern as shown in FIG. Either a case in which a part of the transmission hole pattern is covered with a mesh, or a case in which a mesh approximately the same size as the metal plate itself is prepared as shown in section 9(d) can be adopted.

In addition, the mesh to be prepared in advance may be a conventionally existing woven fabric mesh, or a woven fabric formed by photoetching or the like as shown in FIGS. 9(a) and 9(b). Any mesh that is not a type can be adopted.

Example 4 As shown in Figure 10fa1, on the surface of the photosensitive plastic film 20, there are areas above the film that block light (non-exposed areas: areas corresponding to the plate film and mesh area) and transparent areas. A photomask 45 having a region where
is placed, and ultraviolet rays are irradiated from above the photomask 40 to decompose the photosensitive decomposable plastic with the light transmitted through the transmission area (exposed area) 401 of the photomask, which is then removed and the light from the photomask is removed. A plate film made of a photodegradable plastic and a printing plate made of a mesh made of plastic which remained undecomposed under the shielding area (non-exposed area) 402 were obtained.

The flexure printing plate of the present invention can be obtained by metal plating the surface of such a plastic printing plate.

Example 5 No. 10 (b) [As shown in g, a photomask 40 is placed on the surface of a photosensitive crosslinkable or photopolymerizable plastic film 30, and ultraviolet rays are irradiated from above the photomask to illuminate the photomask. Area to be blocked (non-exposed area) 40
2, the photosensitive crosslinked or photopolymerizable material 30 remaining without crosslinking is removed, and the photosensitive crosslinked film located in the light transmitting area of the photomask is cured by the crosslinking hand. By doing so, a plastic printing plate made of a photosensitive crosslinkable plastic or a photopolymerizable printing plate and a mesh (exposed area: area corresponding to the printing plate and mesh portion) can be obtained.

The flexure printing plate of the present invention can be obtained by metal plating the surface of such a plastic printing plate.

The printing plate of the present invention obtained as described above has extremely difficulty in expanding and contracting against tensile force in the plane direction.
Since it is bendable in the normal direction of the surface and has flexibility, it can be applied to flexure printing shown in FIGS. 5, 6, 7, etc.

By the way, the flexure printing plate of the present application is based on the premise that one end or surface end of the printing plate moves with the movement of the squeegee during printing. ) As shown in the figure, supports 41.42 are provided at opposite ends, which supports move the holder 11.12 shown in section 5, FIG. 6, FIG. 7, etc.; As shown in the figure, there are cases in which no holder is provided and the edge of the printing plate is moved along the holder (in the case of the embodiment shown in Figure 11fbj, holes are provided at the edge of the printing plate). In this case, the holder will penetrate through the chain hole, or a gripping part will be provided to connect the edge of the printing plate and the holder, but in either case, the edge of the printing plate must be made of a solid material that is difficult to deform. ).

That is, the flexure printing plate of the present application has both embodiments in which the supports 41 and 42 are provided at both end portions and in which the supports 41 and 42 are not provided.

(Operations and Effects of the Invention) In the flexure printing plate of the present application having the above configuration, since the four circumferences are not surrounded by the fixed frame, the fifth
It can be immediately applied to flexure printing as shown in FIGS. 6 and 7.

In other words, due to the flexibility of the printing plate itself, it is possible to perform printing while bending and deforming as the squeegee moves, and since it is extremely difficult to expand and contract in the plane direction, the printing plate can be easily expanded and contracted. Not only can pattern distortion caused by this method be avoided, but also the occurrence of ink unevenness between the center and edges of the screen printing plate as described above can also be avoided.

For this reason, when used in flexure printing as shown in Figures 5, 6, and 7, it is possible to print with extremely high resolution, and when forming IC circuits etc. by printing, the function is greatly improved. can demonstrate.

Furthermore, unlike conventional screen printing plates, the mesh does not expand or contract during printing, so the mesh itself has a long lifespan and is economical.

As described above, the present invention has an epoch-making significance in the field of screen printing, and the value of the invention is extremely great.

[Brief explanation of the drawing]

Figure 1: Schematic diagram of a conventional screen printing mesh Figure 2: Schematic diagram showing the mechanism of conventional screen printing Figures 3 (a) and 3 (b): Showing the operating state of conventional screen printing Cross-sectional view Figure 4: Cross-sectional view showing the state in which the squeegee is not pressing the mesh in conventional screen printing Figures 5, 6, and 7: Cross-sectional view showing the principle of improved screen printing Figure 8: FIG. 9(a) is a plan view showing that a mesh is required to support the plate portion of the metal plate constituting the printing plate when it is surrounded by ink permeable holes; Figure 9(b), Figure 9(C), Figure 9(d)
101aJ, 10fbJ: Manufacturing process of a flexure printing plate using the synthetic resin of the present invention 11(a) and 11fb1; Diagrams 11 and 12 showing each embodiment with and without a support at the edge of the printing plate; Improved screen printing machine Holder 2 and squeegee 3 in which the support stands at both ends of the screen move
・Screen printing printing plate 31・Metal plate plate part 32・
Mesh 33, ink permeation holes 4, fixed frame used in conventional screen printing 41, 42, support 5, part that grips the fixed frame used in conventional screen printing 6, substrate to be printed 7, support stand 8.Screen printing machine stand 9.Ink lO.Glass plate
101・Groove 102・Indentation 20・Photosensitive decomposition type plastic film 30・Photosensitive crosslinking type or photosensitive polymerization type plastic film 40・Photomask applicant representative lawyer and patent attorney Nao Akao Hitoshi No. 4vA Figure 9 (d) No. (-') Figure W co+? Bibibi 000°@@hi! Bigo No. 10 (=2) @ No. 10 (b) I! 1

Claims (1)

[Scope of Claims] (1) It has a mesh that is difficult to deform in the plane direction and is flexible against weaving bending in the normal direction, and ink permeation holes in a desired pattern shape, and A printing plate made of a material that is difficult to deform and is flexible against weaving bending in the normal direction thereof is pasted together, and a fixed frame surrounding the four circumferences of the bonded printing film and mesh is not used. (2) A printing plate for flexure printing according to claim (1), characterized in that the plate film is a metal plate (3) A composition in which the plate film has a surface plated with metal. Flexure printing plate according to claim (1), which is a resin plate (4) A material in which a plate film having ink permeation holes in a desired pattern shape and a mesh are integrated from the beginning. (5) A metal plate having ink permeation holes having a desired pattern shape is prepared in advance, and a metal plate is formed in the ink permeation holes in the ink permeation hole. Method for manufacturing a flexure printing plate according to claim (4), which forms a mesh that joins with the plate (6) A metal plate surrounding the mesh and the ink permeation holes in a desired pattern shape. A method for manufacturing a flexure printing plate according to claim (4) by simultaneously forming parts (7) A quasi-metal in which a metal plate having ink permeation holes in a desired pattern shape and an organic fiber are metal-plated. The flexure printing plate (8) according to claim (1), wherein the mesh and the mesh are formed of different members and are joined by metal plating (8) The light transmitted through the photomask A plate film and a mesh portion having ink permeable holes are formed by decomposing the photosensitive plastic by decomposing the photosensitive plastic, by curing the photosensitive crosslinking plastic by a crosslinking reaction, or by polymerizing the photopolymerizable plastic, Method for manufacturing a flexure printing plate characterized by applying metal plating to the mesh portion (9) A metal plate having ink permeable holes and a mesh are prepared as independent materials, and these are joined by plating or electric welding. (10) A method for producing a printing plate for flexure printing according to claim (8), characterized in that supports for movement are provided at both opposing ends. Flexure printing printing plate (11) A flexure printing printing plate according to claim (1), characterized in that no support is provided at both opposing ends.