CN116080252A - Screen printing plate and screen printing plate preparation method - Google Patents
Screen printing plate and screen printing plate preparation method Download PDFInfo
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- CN116080252A CN116080252A CN202310052109.9A CN202310052109A CN116080252A CN 116080252 A CN116080252 A CN 116080252A CN 202310052109 A CN202310052109 A CN 202310052109A CN 116080252 A CN116080252 A CN 116080252A
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- 238000007650 screen-printing Methods 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 69
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- -1 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004642 Polyimide Substances 0.000 claims description 4
- 238000013329 compounding Methods 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 229920002120 photoresistant polymer Polymers 0.000 claims description 3
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- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 12
- 229910052709 silver Inorganic materials 0.000 description 12
- 239000004332 silver Substances 0.000 description 12
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/14—Forme preparation for stencil-printing or silk-screen printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N1/00—Printing plates or foils; Materials therefor
- B41N1/04—Printing plates or foils; Materials therefor metallic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N1/00—Printing plates or foils; Materials therefor
- B41N1/24—Stencils; Stencil materials; Carriers therefor
- B41N1/247—Meshes, gauzes, woven or similar screen materials; Preparation thereof, e.g. by plasma treatment
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
- H01L31/022433—Particular geometry of the grid contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
Abstract
The invention relates to the technical field of battery manufacturing and discloses a screen printing plate and a screen printing plate preparation method. The screen printing plate preparation method is used for preparing a screen printing plate, and the screen printing plate comprises an inner screen frame, a metal screen and a graphic layer. The metal mesh is tensioned on the inner mesh frame through a silk screen, the metal mesh is formed by weaving intersecting warps and wefts, the pattern layer is arranged on the metal mesh, target pattern holes are formed in the pattern layer, the target pattern holes extend along the warp direction, the metal mesh comprises a body area and an opening area, the opening area covers the target pattern holes, and the arrangement density of the wefts in the opening area is smaller than that of the wefts in the body area. The screen printing plate improves the opening ratio of the corresponding part of the metal screen and the target pattern holes, thereby being capable of reducing the widths of the target pattern holes and the printed grids, reducing the printing cost and improving the energy conversion efficiency of the printed products.
Description
Technical Field
The invention relates to the technical field of battery manufacturing, in particular to a screen printing plate and a screen printing plate preparation method.
Background
With the rapid development of the photovoltaic manufacturing industry, the cost reduction and the effect improvement are in a large direction, so that positive and negative grid lines on the battery piece are usually manufactured in a screen printing mode (namely, silver paste is coated on the battery piece by means of a screen plate provided with target graph holes corresponding to the grid lines in size and shape).
The traditional screen printing plate manufacturing method comprises the following steps: as shown in fig. 1, a pattern layer 2 'is fixed on a tensioned metal net 1', and then a target pattern hole 21 'is formed on the pattern layer 2'. The metal wires 11 'at the positions of the metal mesh 1' corresponding to the target pattern holes 21 'are reserved, and the metal wires 11' can support the pattern layer 2', so that the target pattern holes 21' are prevented from deforming in the use process of the screen. However, in this conventional method, the mesh holes of the metal mesh 1 'are small, and the width D of the target pattern hole 21' (i.e., the width of the gate line printed on the battery sheet) cannot be less than 20 μm in order to ensure smooth printing of silver paste on the battery sheet. On one hand, more silver paste is consumed, so that the manufacturing cost of the battery piece is increased; on the other hand, the grid lines occupy more surface area of the battery piece, so that the efficiency of converting the battery piece into electric energy is reduced.
Therefore, there is a need for a screen printing plate and a screen printing plate manufacturing method to solve the above technical problems.
Disclosure of Invention
The invention aims to provide a screen printing plate and a screen printing plate preparation method, wherein the screen printing plate improves the opening ratio of the corresponding part of a metal screen and a target pattern hole, so that the widths of the target pattern hole and a printed grid can be reduced, the printing cost is reduced, and the energy conversion efficiency of a printed product is improved.
To achieve the purpose, the invention adopts the following technical scheme:
a screen, comprising:
an inner net frame;
the metal net is tensioned on the inner net frame through a silk screen and is formed by weaving intersecting warps and wefts;
the pattern layer is arranged on the metal net, a target pattern hole is formed in the pattern layer, and the target pattern hole extends along the warp direction;
the metal net comprises a body area and an opening area, wherein the opening area covers the target pattern holes, and the arrangement density of the wefts in the opening area is smaller than that of the wefts in the body area.
As an alternative, at least a portion of the warp threads of the open area are cut away so that the target pattern holes are offset from the warp thread arrangement.
As an alternative, at least one side of the graphic layer is coated with a wear layer; and/or
And the inner surface of the target pattern hole is coated with a wear-resistant layer.
As an alternative, the thickness of the wear-resistant layer is 0.005-5 μm; and/or
The wear-resistant layer is made of polytetrafluoroethylene or silicon dioxide crystals or silicone oil or a metal material.
As an alternative, the graphic layer is made of polyimide or photoresist or PET material or polytetrafluoroethylene.
The screen printing plate preparation method is used for preparing the screen printing plate, and comprises the following steps:
fixing the silk screen on the outer screen frame to form a screen frame structure;
bonding the edge of the metal net to the silk net, forming a bonding area, and removing the silk net at the inner side of the bonding area;
processing the metal net to form a body area and an opening area, wherein the arrangement density of the wefts in the opening area is smaller than that of the wefts in the body area;
and forming graph layers on two sides of the metal net in a compounding way, and processing target graph holes on the graph layers, wherein the target graph holes are positioned in a range covered by the opening area.
As an alternative, when the metal mesh is processed, part of the warp threads in the opening area are removed, so that the target pattern holes are staggered with the warp threads.
As an alternative, the open area is formed by laser cutting the wires of the metal mesh; or (b)
The opening area is formed in the metal mesh weaving process.
As an alternative, the target pattern hole is processed by a laser cutting method.
As an alternative, the method for preparing a screen printing plate further includes: and after the target pattern holes are processed, coating a wear-resistant layer on the two sides of the pattern layer and the inner surface of the target pattern holes.
The invention has the beneficial effects that:
according to the screen printing plate, the silk threads (including the warps and the wefts) in the opening area of the metal screen can play a role in supporting the pattern layer, so that the structural strength of the screen printing plate and the shape precision of target pattern holes in the using process are guaranteed, the arrangement density of the wefts in the opening area is smaller than that of the wefts in the body area, the opening rate of the metal screen corresponding to the target pattern holes (the ratio of the mesh area of the metal screen corresponding to the target pattern holes) is improved, and therefore when the screen printing plate is used, silver paste can be printed on a battery piece more easily, the width of the target pattern holes (namely the dimension of the target pattern holes along the weft direction) can be correspondingly reduced, the width of grid lines printed by the screen printing plate can be further reduced, the using amount of the silver paste is reduced, and the manufacturing cost of the battery piece is reduced; in addition, the small width of the grid line on the battery piece can also reduce the surface area of the battery piece occupied by the grid line, so that the efficiency of converting electric energy of the battery piece is improved.
The screen printing plate preparation method can manufacture the screen printing plate, thereby reducing the cost of the printed product and improving the energy conversion efficiency of the printed product.
Drawings
FIG. 1 is a top view of a prior art provided screen;
FIG. 2 is a cross-sectional view of a screen provided in accordance with an embodiment of the present invention;
FIG. 3 is a flowchart of a method for preparing a screen printing plate according to an embodiment of the invention;
FIG. 4 is a top view of a frame structure provided in accordance with an embodiment of the present invention;
FIG. 5 is a top view of a metal mesh bonded to a wire mesh according to an embodiment of the present invention;
FIG. 6 is a top view of an open area formed in a wire mesh according to an embodiment of the present invention;
FIG. 7 is a top view of the structure of FIG. 6 after the inner frame has been secured;
FIG. 8 is a top view of the structure of FIG. 7 with the outer frame removed;
FIG. 9 is a top view of a composite graphic layer on a metal mesh according to an embodiment of the present invention;
FIG. 10 is a cross-sectional view of the structure of FIG. 9;
FIG. 11 is a schematic diagram of a structure of a pattern layer after processing a hole of a target pattern according to an embodiment of the present invention;
fig. 12 is a cross-sectional view of the structure of fig. 11.
In the figure:
1', a metal mesh; 11', metal wires; 2', a graphics layer; 21', target pattern holes;
1. a frame structure; 11. a silk screen; 12. an outer frame; 2. a metal mesh; 21. warp threads; 22. a weft thread; 23. a body region; 24. an opening region; 3. a graphics layer; 31. a target pattern hole; 4. a wear-resistant layer; 5. an adhesive region; 6. an inner frame.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
The embodiment provides a screen printing plate and a screen printing plate preparation method, wherein the screen printing plate preparation method is used for preparing a screen printing plate, the screen printing plate can be used for printing silver paste on a battery piece, so that grid lines are formed on the battery piece, and the grid lines are used for forming positive electrodes/negative electrodes of the battery piece. As shown in fig. 2-12, the screen comprises an inner frame 6, a metal screen 2 and a graphics layer 3. Wherein, as shown in fig. 2 and 8, the metal net 2 is tensioned on the inner net frame 6 by the wire mesh 11. Specifically, the metal net 2 is woven from threads including warp threads 21 and weft threads 22, and the warp threads 21 and the weft threads 22 are vertically arranged and woven to form the metal net 2. As shown in fig. 9-12, the pattern layer 3 is disposed on the metal mesh 2, and the pattern layer 3 is provided with a target pattern hole 31. The target pattern holes 31 are matched with the shape and the size of the grid lines to be printed on the battery piece, and the target pattern holes 31 extend along the direction of the warp threads 21. As shown in fig. 8, the metal net 2 includes a body region 23 and an opening region 24, the opening region 24 covers the target pattern hole 31, and the arrangement density of the wefts 22 of the opening region 24 is smaller than that of the body region 23.
In the screen printing plate of the embodiment, the silk threads (including the warp threads 21 and the weft threads 22) in the opening area 24 of the metal screen 2 can play a supporting role on the pattern layer 3, so that the structural strength of the screen printing plate and the shape accuracy of the target pattern holes 31 in the using process are ensured. The arrangement density of the wefts 22 in the opening area 24 is smaller than that of the wefts 22 in the body area 23, so that the opening ratio (the opening ratio: the mesh area of the metal mesh 2 corresponding to the target pattern holes 31 to the area of the target pattern holes 31) of the metal mesh 2 corresponding to the target pattern holes 31 is improved, and when screen printing is used, silver paste can be printed on a battery piece more easily, so that the width of the target pattern holes 31 (namely, the dimension of the target pattern holes 31 along the weft 22) can be correspondingly reduced on the basis of ensuring that the silver paste is printed on the battery piece smoothly, and the width of grid lines printed by the screen can be reduced, thereby reducing the use amount of the silver paste and the manufacturing cost of the battery piece; in addition, the small width of the grid line on the battery piece can also reduce the surface area of the battery piece occupied by the grid line, so that the efficiency of converting electric energy of the battery piece is improved.
Specifically, by adopting the screen printing plate of the embodiment to print silver paste on the battery piece, the narrowest line width of the grid line of the battery piece is less than or equal to 5um, the consumption of the silver paste is reduced by more than 17.89%, and the efficiency of the battery piece for converting solar energy into electric energy is improved by more than 0.11%.
As shown in fig. 2 to 12, the process of manufacturing the screen and the detailed structure of the screen are described below in connection with the method of manufacturing the screen. The screen printing plate preparation method comprises the following steps:
step 10, as shown in fig. 4, fixing a screen 11 on an outer frame 12 to form a frame structure 1;
step 20, as shown in fig. 5, bonding the edge of the metal mesh 2 to the screen 11, forming a bonding area 5, and removing the screen 11 inside the bonding area 5;
step 30, as shown in fig. 6, processing the metal mesh 2 to form a body area 23 and an opening area 24 by the metal mesh 2, wherein the arrangement density of the weft yarns 22 of the opening area 24 is smaller than the arrangement density of the weft yarns 22 of the body area 23;
step 40, as shown in fig. 7, fixing the inner frame 6 on the screen 11 between the outer frame 12 and the bonding area 5, thereby tensioning the current metal mesh 2, and removing the screen 11 and the outer frame 12 outside the inner frame 6, as shown in fig. 8. The current metal net 2 can be better tensioned by arranging the inner net frame 6, and a specific tensioning mode for tensioning the metal net 2 can be one of the existing tensioning modes such as top frame, press frame and the like, which is not limited herein.
In step 50, as shown in fig. 9, the pattern layers 3 are formed on both sides of the metal mesh 2 in a compounding manner, and the target pattern holes 31 are processed on the pattern layers 3, wherein the target pattern holes 31 are located in the coverage area of the opening area 24. Therefore, the distribution density of the weft yarns 22 on the metal mesh 2 corresponding to the target pattern holes 31 can be ensured to be smaller than that of the weft yarns on other positions, the opening ratio of the metal mesh 2 corresponding to the target pattern holes 31 can be further ensured to be increased, the width of the target pattern holes 31 can be further reduced, the width of grid lines of screen printing is reduced, the silver paste consumption and the manufacturing cost of the battery piece are further reduced, and the energy conversion efficiency of the battery piece is improved.
In this embodiment, the screen 11 may be a polyester screen. As shown in fig. 4, in step 10, the screen 11 may be fixed to the outer frame 12 by means of bonding, and after the screen 11 is fixed to the outer frame 12, the tension of the screen 11 needs to be maintained between 10 and 60N. It will be appreciated that other means of securing and tensioning the screen 11 to the outer frame 12 are possible in the prior art and are not specifically limited herein.
Alternatively, in step 20, the metal mesh 2 may be bonded to the wire mesh 11 by glue or by a hot-melt material. In this embodiment, as shown in fig. 5, the metal mesh 2 is bonded to the screen 11 using a hot-melt material, and the bonding material forms the annular bonding region 5. The wire mesh 11 inside the annular bonding area 5 is cut away so that both sides of the metal mesh 2 are exposed. The specific manner of cutting the wire mesh 11 is known in the art and will not be described in detail herein.
Preferably, in step 30, the open areas 24 are formed by laser cutting the wires of the metal mesh 2 while the metal mesh 2 is being processed. The laser cutting method is convenient and flexible to operate and low in cost. In other embodiments, the metal mesh 2 may be processed to form the opening area 24 by: cutting by etching method and cutting by electro-etching method. In a further embodiment, the open area 24 may be formed directly during the braiding of the wire mesh 2, i.e. in this case the formation of the open area 24 is completed before the bonding of the edges of the wire mesh 2 to the wire mesh 11 in step 20.
In the conventional metal mesh 2, the minimum distance between two adjacent warp threads 21 is 49 μm, that is, in an ideal state (in a state where the warp threads 21 of the steel mesh 11 are absolutely parallel to the target pattern holes 31), the warp threads 21 themselves do not affect the aperture ratio of the metal mesh 2 at the positions corresponding to the target pattern holes 31. However, in the actual use process, the warp threads 21 of the metal mesh 2 may be deflected, so that a part of the warp threads 21 are exposed from the positions of the target pattern holes 31, and the accuracy of the grid lines printed on the battery sheet is affected.
In this regard, preferably, as shown in fig. 8, when the metal mesh 2 is processed in step 30, part of the warp threads 21 in the opening area 24 are removed, and the distance between two adjacent warp threads 21 is further increased, so that when the extending direction of the warp threads 21 is inclined, the warp threads 21 are ensured not to be exposed from the target pattern holes 31, and the grid lines obtained by screen printing are ensured to be straight and accurate.
Alternatively, as shown in fig. 6, the weft threads 22 at the open area 24 may be distributed as follows: after every 3 wefts 22 are cut off, the next 1 weft 22 is reserved, and the next 1 weft 22 is sequentially alternated, and hereinafter, the next 1 weft is reserved for 3 cutting. Alternatively, the process may be carried out in a single-stage, the distribution of the wefts 22 in the open area 24 may also be 1 for cut 1, 1 for cut 2, 2 for cut 3, 3 for cut 3, 1 for cut 4 one of cut 4 left 2, cut 4 left 3, cut 4 left 4, cut 5 left 1, cut 5 left 2, cut 5 left 3, cut 5 left 4, cut 5 left 5, the present invention is not particularly limited herein.
Alternatively, the warp threads 21 at the opening region 24 may be distributed as follows: cutting 1, 2, 3, 4 and 1, cut 4 to leave 2, cut 4 to leave 3, cut 4 to leave 4, cut 5 to leave 1, cut 5 to leave 2, cut 5 to leave 3, cut 5 to leave 4, cut 5 to leave 5.
Optionally, in step 50, the material of the pattern layer 3 formed by compounding on both sides of the metal mesh 2 may be polyimide, which has low cost and better structural strength. When the polyimide material is compounded on the steel wire mesh 11, the curing temperature is 60-400 ℃, the time is 5-60 minutes, and the pressure is 50-30000N. In other embodiments, the material of the graphic layer 3 may be one of photoresist, PET, and polytetrafluoroethylene organic polymer material.
Alternatively, in step 50, the method of processing the target pattern hole 31 on the pattern layer 3 may be cutting with a laser. When the pattern layer 3 is cut, the working power of the laser cutting tool can be controlled, so that the wire at the position corresponding to the target pattern hole 31 is prevented from being cut.
Preferably, as shown in fig. 2 and 3, the screen printing method further includes a step 60 of coating the wear-resistant layer 4 on both sides of the pattern layer 3 and the inner surface of the target pattern hole 31. Therefore, in the process of repeatedly using the screen, the abrasion of the graphic layer 3 can be greatly reduced, the accuracy of the grid lines printed by the screen can be ensured, and the service life of the screen can be prolonged. It will be appreciated that in some embodiments, the wear-resistant layer 4 may alternatively be applied to only one side of the pattern layer 3 or to only the inner surface of the target pattern hole 31, which is not limited herein. After the laser cuts the target pattern holes 31, the current screen is cleaned, so as to remove dust generated by the laser cutting, and further ensure that the wear-resistant layer 4 is uniformly and firmly attached to the pattern layer 3.
The wear-resistant layer 4 is optionally made of nano materials, and the wear-resistant layer 4 can be one or more of polytetrafluoroethylene or silicon dioxide crystals or silicone oil or metal materials. Alternatively, the wear layer 4 may be applied to the graphics layer 3 by spraying, dipping, slot coating, or the like. Optionally, the thickness of the wear-resistant layer 4 is 0.005-5 μm, and the drying temperature of the wear-resistant layer 4 is 30-400 ℃ and the time is 60-3600 seconds.
It is to be understood that the foregoing examples of the invention are provided for the purpose of illustration only and are not intended to limit the scope of the invention, which is defined by the claims, since modifications in both the detailed description and the application scope of the invention will become apparent to those skilled in the art upon consideration of the teachings of the invention. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (10)
1. A screen printing plate, comprising:
an inner mesh frame (6);
the metal net (2) is tensioned on the inner net frame (6) through a silk screen (11), and the metal net (2) is formed by weaving intersecting warp threads (21) and weft threads (22);
the pattern layer (3) is arranged on the metal net (2), a target pattern hole (31) is formed in the pattern layer (3), and the target pattern hole (31) extends along the direction of the warp (21);
the metal mesh (2) comprises a body region (23) and an opening region (24), wherein the opening region (24) covers the target pattern holes (31), and the arrangement density of the wefts (22) of the opening region (24) is smaller than that of the wefts (22) of the body region (23).
2. Screen according to claim 1, wherein at least part of the warp threads (21) of the opening area (24) are cut away so that the target pattern holes (31) are arranged offset from the warp threads (21).
3. Screen according to claim 1, wherein at least one side of the graphic layer (3) is coated with a wear layer (4); and/or
The inner surface of the target pattern hole (31) is coated with a wear-resistant layer (4).
4. A screen according to claim 3, wherein the wear layer (4) has a thickness of 0.005-5 μm; and/or
The wear-resistant layer (4) is made of polytetrafluoroethylene or silicon dioxide crystals or silicone oil or a metal material.
5. Screen according to any of claims 1 to 4, wherein the graphics layer (3) is made of polyimide or photoresist or PET material or polytetrafluoroethylene.
6. A screen printing plate manufacturing method for manufacturing a screen printing plate according to any one of claims 1 to 5, comprising:
fixing the screen (11) to an outer frame (12) to form a frame structure (1);
bonding the edge of the metal mesh (2) to the wire mesh (11) and forming a bonding area (5), and removing the wire mesh (11) inside the bonding area (5);
processing the metal mesh (2) to form a body region (23) and an opening region (24) by the metal mesh (2), wherein the arrangement density of the wefts (22) in the opening region (24) is smaller than that of the wefts (22) in the body region (23);
and forming pattern layers (3) on two sides of the metal net (2) in a compounding way, and processing target pattern holes (31) on the pattern layers (3), wherein the target pattern holes (31) are positioned in the coverage range of the opening area (24).
7. A screen printing method according to claim 6, wherein, when the metal screen (2) is processed, part of the warp threads (21) of the opening area (24) are removed so that the target pattern holes (31) are arranged offset from the warp threads (21).
8. A screen printing method according to claim 6, wherein the open areas (24) are formed by laser cutting wires of the metal mesh (2); or (b)
The open area (24) is formed during the braiding process of the metal mesh (2).
9. The screen printing method according to claim 6, wherein the target pattern holes (31) are processed by a laser cutting method.
10. The screen printing plate manufacturing method according to any one of claims 6 to 9, further comprising: after the target pattern holes (31) are processed, wear-resistant layers (4) are coated on the two sides of the pattern layer (3) and the inner surfaces of the target pattern holes (31).
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| EP0473973A1 (en) * | 1990-09-04 | 1992-03-11 | MDC Max Dätwyler Bleienbach AG | Process for the treatment of intaglio printing plates |
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