CN117227313A - Screen printing plate structure - Google Patents

Abstract

The application discloses a screen structure, which comprises: a screen frame; the mesh cloth comprises a first area, a second area and a third area in sequence in a first direction, wherein the first area, the second area and the third area comprise a first group of mesh wires, the first group of mesh wires comprise a plurality of mesh wires which are parallel to each other and extend along the first direction, the first area further comprises a second group of mesh wires which are interwoven with the first group of mesh wires, no mesh wire interwoven with the first group of mesh wires exists in the second area, the third area further comprises a third group of mesh wires which are interwoven with the first group of mesh wires, and the mesh cloth is connected with the mesh frame at two ends of the first direction; and the mask layer is positioned in the second area of the mesh cloth and/or at least one side of the second area, and a plurality of pattern openings are formed in the mask layer. According to the screen printing plate structure, the printing effect of the graph can be remarkably improved.

Description

Screen printing plate structure

Technical Field

The application relates to the technical field of screen printing, in particular to a screen structure.

Background

The screen structure used in the current screen printing mainly comprises a screen frame, screen cloth and a mask for controlling graphics. In the screen printing process, the printing material (paste, ink, glue, etc.) is subjected to resistance from the screen and the side walls of the channels in the transfer channels (transfer channels refer to the channels through which the screen printed printing material moves from one side of the screen to the substrate on the other side of the screen). As transfer channels become narrower, the effect of these resistances becomes more and more pronounced, which makes it difficult to obtain well-printed patterns.

With current screen constructions, the printing effect of the graphics remains to be improved, since the printing material always receives resistance from the two sets of wires interlaced with each other in the transfer channel.

There is therefore a need for an improvement to at least partially solve the above-mentioned problems.

Disclosure of Invention

In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. The summary of the application is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

In order to at least partially solve the above-mentioned problems, according to a first aspect of the present application, there is provided a screen structure comprising:

a screen frame;

the mesh cloth comprises a first area, a second area and a third area in sequence in a first direction, wherein the first area, the second area and the third area comprise a first group of mesh wires, the first group of mesh wires comprise a plurality of mesh wires which are parallel to each other and extend along the first direction, the first area further comprises a second group of mesh wires which are interwoven with the first group of mesh wires, no mesh wire interwoven with the first group of mesh wires exists in the second area, the third area further comprises a third group of mesh wires which are interwoven with the first group of mesh wires, and the mesh cloth is connected with the mesh frame at two ends of the first direction;

and the mask layer is positioned in the second area of the mesh cloth and/or at least one side of the second area, and a plurality of pattern openings are formed in the mask layer.

Illustratively, the mesh cloth has a gap of a predetermined size between at least one end of the mesh cloth in a second direction perpendicular to the first direction and the frame; or alternatively, the first and second heat exchangers may be,

at least one end of the mesh cloth in a second direction perpendicular to the first direction is connected with the mesh frame through polyester mesh cloth.

Illustratively, the mesh cloth is provided with reinforcing ribs extending along the first direction at least at one end of a second direction perpendicular to the first direction, and two ends of the reinforcing ribs are connected with the mesh frame;

the area between one side of strengthening rib keeping away from the screen cloth with the screen frame is covered through polyester screen cloth.

Illustratively, the reinforcing ribs are a plurality of mutually parallel metal wires, and the wire diameter of the metal wires is larger than that of the wires in the second area; or alternatively, the first and second heat exchangers may be,

the reinforcing ribs are metal strips.

The first area includes a first sub-area and a second sub-area, two ends of the first sub-area in the first direction are respectively connected with the second sub-area and the second area, the first sub-area includes the first group of wires and the second group of wires, the first group of wires and the second group of wires are both metal wires, two ends of the second sub-area in the first direction are respectively connected with the screen frame and the first sub-area, the second sub-area includes at least two groups of wires which are interwoven with each other, and the wires of the second sub-area are polyester wires;

the third region comprises a third sub-region and a fourth sub-region, the two ends of the third sub-region in the first direction are respectively connected with the second region and the fourth sub-region, the third sub-region comprises a first group of net wires and a third group of net wires, the first group of net wires and the third group of net wires are metal net wires, the two ends of the fourth sub-region in the first direction are respectively connected with the third sub-region and the net frame, the fourth sub-region comprises at least two groups of net wires which are mutually interwoven, and the net wires of the fourth sub-region are polyester net wires.

Illustratively, the tension of the mesh of the second region in the first direction is greater than the tension in a second direction, the second direction being perpendicular to the first direction.

Illustratively, the second region has an area that is greater than 40% of the area of the web.

Illustratively, in the second region of the web, the distances between adjacent wires are equal.

Illustratively, at least a portion of the mesh is removed in the second region of the web.

Illustratively, the mask layer is a film or polyimide film;

the pattern openings on the mask layer are formed by laser ablation;

at least one of the pattern openings is located entirely between two adjacent wires in the second region.

According to the screen printing plate structure, as the mask layer is arranged in the second area with only one group of parallel screen wires, the printing material can only bear the resistance of one group of parallel screen wires in the transfer channel, or the screen wires can not be arranged in the transfer channel, and the printing material can not bear the resistance of the screen wires in the transfer channel, so that the screen printing plate structure can obviously improve the printing effect of the graph.

Drawings

The following drawings are included to provide an understanding of the application and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the application and their description to explain the principles and apparatus of the application. In the drawings of which there are shown,

FIG. 1 is a schematic view of a screen structure according to a first embodiment of the present application;

FIG. 2 is a schematic view of a screen structure according to a second embodiment of the present application;

FIG. 3 is a schematic view of a screen structure according to a third embodiment of the present application;

FIG. 4 is a schematic view of a screen structure according to a fourth embodiment of the present application;

FIG. 5 is a schematic view of a screen structure according to a fifth embodiment of the present application;

FIG. 6 is a schematic view of a screen structure according to a sixth embodiment of the present application;

reference numerals illustrate:

100-net frame, 200-net cloth, 210-first area, 211-first subarea, 212-second subarea, 220-second area, 230-third area, 231-third subarea, 232-fourth subarea, 300-reinforcing rib and 400-polyester net cloth;

x-first direction, Y-second direction.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the application may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the application.

It should be understood that the present application may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. In the drawings, the size of layers and regions, as well as the relative sizes, may be exaggerated for clarity. Like numbers refer to like elements throughout.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present application.

Spatially relative terms, such as "under," "below," "beneath," "under," "above," "over," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation depicted in the figures.

In the current screen structure, the printing effect of the pattern is still to be improved because the printing material (such as sizing agent, printing ink, glue, etc.) always receives resistance from two groups of mutually interwoven screen wires in the transfer channel.

In order to at least partially solve the above problems, the present application provides a screen structure comprising a screen frame, a mesh cloth, and a mask layer.

The frame may be a metal frame, such as an aluminum frame, having a certain strength and stability for carrying and securing the mesh. The net frame is generally rectangular, the middle part is hollowed out, the net cloth is fixedly connected with the net frame, and the hollowed-out area in the middle part of the net frame is at least partially covered.

The mesh cloth sequentially comprises a first area, a second area and a third area in a first direction, wherein the first area, the second area and the third area comprise a first group of mesh wires, and the first group of mesh wires comprise a plurality of mesh wires which are parallel to each other and extend along the first direction. The first region further includes a second set of wires interwoven with the first set of wires, which may be perpendicular to the first set of wires or inclined relative to the first set of wires. There are no wires in the second region that are interwoven with the first set of wires, i.e. there is only one set of wires in the second region that are parallel to each other and extend in the first direction. The third region further includes a third set of wires interwoven with the first set of wires, which may be perpendicular to the first set of wires or inclined relative to the first set of wires. The area of the second region may be greater than 40% of the area of the web. The two ends of the mesh cloth in the first direction are connected with the mesh frame, and the tension of the stretched mesh can be mainly applied to the first area and the third area, so that the tension of the mesh wire in the second area in the first direction is larger than the tension of the mesh wire in the second direction perpendicular to the first direction, and the mesh wire in the second area is flat and uniformly stressed.

The mask layer is located in the second area of the mesh cloth and/or located on at least one side of the second area, wherein the mask layer is located in the second area and refers to hollowed-out areas between the meshes in the second area, and the mask layer is located on at least one side of the second area and refers to any side surface or both side surfaces of a plane area formed by the meshes in the second area. The mask layer is provided with a plurality of pattern openings, and the pattern openings are matched with the pattern shape required to be screen printed. The mask layer can be a film and comprises photosensitive glue, the main components of the photosensitive glue comprise film forming agents, photosensitive agents and auxiliary agents, the film forming agents can be composed of water-soluble high polymer substances such as acrylic resin, silicon-containing resin, PVA (polyvinyl alcohol) and the like, and the film forming agents determine the screen sticking fastness and the resistance (such as solvent resistance, water resistance, ageing resistance, printing resistance and the like) of the plate film; the photosensitizer is a compound which can take a chemical reaction under the irradiation of blue-violet light to cause polymerization or crosslinking of the film forming agent, and determines the performances of the photoresist such as light splitting sensitivity, resolution, definition and the like; adjuvants are used to adjust the performance of the main components (i.e. film forming agent and sensitizer), and adjuvants such as sensitizer, dispersant, stabilizer, colorant, plasticizer, etc. are added. Specifically, a doctor blade is used for uniformly coating photoresist on a part or all of a second area of the mesh cloth, the photoresist is exposed, heated and cured to form a mask layer, and then the mask layer is processed in a laser ablation mode to form pattern openings. In some embodiments, the photoresist may be uniformly coated on a part or all of the second area of the mesh with a doctor blade, then baked, then the film is fixed on the mesh for exposure, and then the mesh is soaked and washed to obtain a mask layer with pattern openings, which is fixed on the mesh, because the photoresist exposed (for example, exposed to ultraviolet rays) is hardened and fixed on the mesh, and the part not exposed to ultraviolet rays is dissolved in water. It is noted that the masking layer may also be implemented by any other suitable layer capable of functioning as a mask, for example by a layer of organic material, such as a plastic or metal layer, etc. In some embodiments, the mask layer may also be a PI (Polyimide) film.

Because the mask layer is arranged in the second area with only one group of parallel wires, the printing material can only bear the resistance of the one group of parallel wires in the transfer channel, so that the resistance is smaller compared with the conventional screen structure, and the pattern printing effect is better. Further, at least one pattern opening on the mask layer may be an elongated opening (for example, when the printed pattern is a thin grid line of the solar cell), and the extending direction of the pattern opening is consistent with the extending direction of the mesh in the second area, so that the pattern opening may be completely located between two adjacent meshes in the second area, in this case, the transfer channel does not have a mesh, the printing material is not subjected to resistance of the mesh in the transfer channel, so that full-opening pattern printing is realized, and the effect of pattern printing may be significantly improved. In particular, having at least one pattern opening in the mask layer completely between two adjacent wires in said second area may be achieved in the following way. In some embodiments, the differential braiding of the mesh may be such that the distance between adjacent mesh wires in the second region is unequal, i.e., the distance between adjacent mesh wires in the second region is greater and the distance between adjacent mesh wires in the second region is smaller, and the at least one pattern opening in the mask layer may be located entirely between two adjacent mesh wires in the second region that are greater in distance, such that no mesh wires are present in the transfer channel. In some embodiments, the distance between adjacent filaments in the second region of the web is equal, and the distance between adjacent filaments is greater than the distance between the elongated pattern openings in the width direction, such that at least one pattern opening in the mask layer may be entirely located between two adjacent filaments in the second region, such that no filaments are present in the transfer channel. In some embodiments, in the second region of the web, the distances between adjacent filaments are equal, and when the positions of the pattern openings and the positions of the partial filaments overlap, the filaments at the positions of the pattern openings can be removed by laser or chemical methods, so that no filaments are present in the transfer channel.

The screen structure of the present application will be exemplarily described with reference to fig. 1 to 6.

Fig. 1 shows a screen structure according to a first embodiment of the present application. In this embodiment, the mesh 200 may be a metal mesh (e.g., a stainless steel mesh or other suitable metal mesh, etc.), and the mesh 200 has a first region 210, a second region 220, and a third region 230 sequentially from left to right in a first direction (X direction in the drawing, i.e., a horizontal direction), where each of the first region 210, the second region 220, and the third region 230 includes a first set of mesh wires, and the first set of mesh wires includes a plurality of mesh wires that are parallel to each other and extend along the first direction. The first region 210 further includes a second set of wires interwoven with the first set of wires, the second set of wires including a plurality of wires parallel to each other and extending in a second direction (Y-direction in the figure, i.e., vertical direction) perpendicular to the first direction. The second region 220 only includes a plurality of mesh wires that are parallel to each other and extend in the first direction. The third region 230 also includes a third set of wires interwoven with the first set of wires, the third set of wires including a plurality of wires extending parallel to each other and in the second direction. The mesh cloth 200 is connected to the frame 100 at both ends in the first direction. The mask layer is located inside the second area 220 of the mesh 200 and/or on at least one side of the second area 220, and is provided with a plurality of pattern openings, wherein the pattern openings are in a strip shape, the extending direction of the pattern openings is consistent with the first direction, and the pattern openings are used for printing thin grid lines of the solar panel. The plurality of pattern openings are each located between two adjacent mesh filaments in the second region 220.

The mesh cloth 200 is provided with reinforcing ribs 300 extending in the first direction at both ends of the second direction perpendicular to the first direction, both ends of the reinforcing ribs 300 are connected with the mesh frame 100, and a region between one side of the reinforcing ribs 300 away from the mesh cloth 200 and the mesh frame 100 is covered by a polyester mesh cloth 400. The reinforcing bars 300 may be a plurality of metal wires parallel to each other, the wire diameter of which is larger than the wire diameter of the wires of the second region 220; the reinforcing bars 300 may also be thin steel bars. The reinforcing ribs 300 may be disposed adjacent to the mesh 200 without being directly connected to the mesh 200, and the polyester mesh 400 is adhered to the reinforcing ribs 300 and the mesh frame 100, so that the wires of the second region 220 have only tension in the first direction, no tension is applied in the second direction, and the wires of the second region 220 are flat and uniformly stressed. In some embodiments, the stiffener 300 may also be at least partially bonded to the web 200. When the length of the printing scratch bar is greater than the width of the mesh 200 in the second direction and screen printing is performed by moving along the first direction, printing of the full-open pattern can be achieved.

In the screen structure of this embodiment, when manufacturing, the metal mesh is first used to weave the screen fabric, the first area 210 is woven by two groups of theodolite wires perpendicular to each other, the second area 220 only retains warp threads, and the third area 230 is still woven by warp threads and weft threads. This is repeated until a web of a specified length is formed. The web is then cut into the web 200 shape shown in fig. 1. Tension is applied to the first region 210 and the third region 230 of the net cloth 200 to stretch the net, and a gap of a predetermined size exists between both ends of the net cloth 200 in the second direction and the net frame 100. The stiffener 300 is then secured to the frame 100 (e.g., by bonding) and the area between the stiffener 300 and the frame 100 is covered with a polyester mesh 400. The polyester mesh 400 may be bonded to the stiffener 300 and the frame 100. Thereafter, a mask layer is applied to the second region 220 of the web 200, and pattern openings are formed in the mask layer by laser ablation, the pattern openings being located between adjacent ones of the wires in the second region 220.

Fig. 2 and 3 show a screen structure according to a second embodiment and a third embodiment of the present application. The screen frame 100 and the mesh cloth 200 in the screen structure of the second embodiment are the same as those of the first embodiment, except that the screen structure of the second embodiment is not provided with the reinforcing ribs 300 and the polyester mesh cloth 400, and the mesh cloth 200 maintains a gap of a predetermined size between both ends of the second direction and the screen frame 100. The screen frame 100 and the mesh cloth 200 in the screen structure of the third embodiment are the same as those of the first embodiment, except that the screen structure of the third embodiment is not provided with the reinforcing ribs 300, and the gaps between both ends of the mesh cloth 200 in the second direction and the screen frame 100 are filled with the polyester mesh cloth 400. The polyester mesh cloth 400 is adhered to the mesh cloth 200 and the mesh frame 100, and the tension of the mesh cloth 200 in the screen structure of the third embodiment in the first direction is much greater than the tension in the second direction, and the tension in the second direction is extremely small, so that the mesh wires of the second area 220 are not affected substantially, and the mesh wires of the second area 220 can be kept stable. For the screen structures shown in fig. 2 and fig. 3, the mask layer is set to be the same as the screen structure shown in fig. 1, and details are not repeated here.

Fig. 4 shows a screen structure according to a fourth embodiment of the present application. In this embodiment, the mesh 200 may be a composite mesh (i.e. a mesh formed by compositing a metal mesh and a polyester mesh), where the mesh 200 has a first area 210, a second area 220 and a third area 230 sequentially from left to right in a first direction (X direction in the drawing, i.e. horizontal direction), where the first area 210 includes a first sub-area 211 and a second sub-area 212, two ends of the first sub-area 211 in the first direction are respectively connected to the second sub-area 212 and the second area 220, two ends of the second sub-area 212 in the first direction are respectively connected to the mesh frame 100 and the first sub-area 211, and the second sub-area 212 includes at least two groups of mesh wires interwoven with each other. The third area 230 includes a third sub-area 231 and a fourth sub-area 232, two ends of the third sub-area 231 in the first direction are respectively connected with the second area 220 and the fourth sub-area 232, two ends of the fourth sub-area 232 in the first direction are respectively connected with the third sub-area 231 and the net frame 100, and the fourth sub-area 232 includes at least two groups of net wires interwoven with each other. The first sub-area 211, the second area 220 and the third sub-area 231 are metal meshes, wherein the meshes are metal meshes, the first sub-area 211, the second area 220 and the third sub-area 231 each comprise a first group of meshes, the first group of meshes comprise a plurality of meshes parallel to each other and extending along a first direction, the first sub-area 211 further comprises a second group of meshes interwoven with the first group of meshes, the second group of meshes comprise a plurality of meshes parallel to each other and extending along a second direction (Y direction in the figure, i.e. vertical direction), the third sub-area 231 further comprises a third group of meshes interwoven with the first group of meshes, and the third group of meshes comprise a plurality of meshes parallel to each other and extending along a second direction (Y direction in the figure, i.e. vertical direction). The second sub-region 212 and the fourth sub-region 232 are polyester mesh fabrics, wherein the mesh is a polyester mesh. The mesh cloth 200 is connected to the frame 100 at both ends in the first direction. The mask layer is located inside the second area 220 of the mesh 200 and/or on at least one side of the second area 220, and is provided with a plurality of pattern openings, wherein the pattern openings are in a strip shape, the extending direction of the pattern openings is consistent with the first direction, and the pattern openings are used for printing thin grid lines of the solar panel. The pattern openings are each located between two adjacent mesh wires in the second region 220.

The mesh cloth 200 is provided at both ends of the second direction perpendicular to the first direction with reinforcing ribs 300 extending in the first direction, both ends of the reinforcing ribs 300 are connected with the mesh frame 100, and a region between a side of the reinforcing ribs 300 remote from the mesh cloth 200 and the mesh frame 100 is covered by the polyester mesh cloth 400. The reinforcing bars 300 may be a plurality of metal wires parallel to each other or thin, and the wire diameter of the metal wires is greater than that of the wires of the second region 220; the reinforcing bars 300 may also be thin steel bars. The reinforcing ribs 300 may be disposed adjacent to the mesh 200 without being connected to the mesh 200, and the polyester mesh 400 is adhered to the reinforcing ribs 300 and the mesh frame 100, so that the wires of the second region 220 have only tension in the first direction, no tension is applied in the second direction, and the wires of the second region 220 are flat and uniformly stressed. In some embodiments, the stiffener 300 may also be at least partially bonded to the web 200. When the length of the printing scratch bar is greater than the width of the mesh 200 in the second direction and screen printing is performed by moving along the first direction, printing of the full-open pattern can be achieved.

In the screen structure of this embodiment, when manufacturing, firstly, a metal mesh is used to weave a screen, the first subregion 211 is woven by two groups of mutually perpendicular theodolite wires, the second region 220 only retains warp threads, and the third subregion 231 is still woven by warp threads and weft threads. This is repeated until a web of a specified length is formed. The web is then cut into the shape shown in fig. 4 (including the first sub-region 211, the second region 220, and the third sub-region 231). During stretching, tension is firstly applied to the polyester mesh cloth to stretch the mesh cloth on the mesh frame 100, the polyester mesh cloth covers the area where the mesh cloth 200 is positioned, then the cut metal mesh cloth is stuck to the polyester mesh cloth, and then part of the polyester mesh cloth at the second area 220, the first subarea 211 and the third subarea 231 is removed. The mesh cloth 200 has a gap of a predetermined size between both ends of the second direction and the frame 100. The stiffener 300 is then secured to the frame 100 (e.g., by bonding) and the area between the stiffener 300 and the frame 100 is covered with a polyester mesh 400. The polyester mesh 400 may be bonded to the stiffener 300 and the frame 100. Thereafter, a mask layer is applied to the second region 220 of the web 200, and pattern openings are formed in the mask layer by laser ablation, the pattern openings being located between adjacent ones of the wires in the second region 220. Because the metal mesh cloth is generally expensive, and the polyester mesh cloth is cheaper, the mesh cloth 200 of the embodiment partially uses the polyester mesh cloth in the first region 210 and the third region 230, which can effectively reduce the cost of the screen structure and has good economy.

Fig. 5 and 6 show a screen structure according to a fifth embodiment and a sixth embodiment of the present application. The screen frame 100 and the mesh cloth 200 in the screen structure of the fifth embodiment are the same as those of the fourth embodiment, except that the screen structure of the fifth embodiment is not provided with the reinforcing ribs 300 and the polyester mesh cloth 400, and the mesh cloth 200 maintains a gap of a predetermined size between both ends of the second direction and the screen frame 100. The first, second and third subregions 211, 220 and 231 of the mesh 200 in the screen structure of the sixth embodiment are metal meshes, the second and fourth subregions 212 and 232 of the metal meshes are polyester meshes, and the gap between both ends of the mesh 200 in the second direction and the screen frame 100 is filled with the polyester meshes 400, that is, the metal meshes (including the first, second and third subregions 211, 220 and 231) are connected with the screen frame in the circumferential direction through the polyester meshes. For the screen structures shown in fig. 5 and 6, the mask layer is set to be the same as the screen structure shown in fig. 4, and details are not repeated here.

Although the illustrative embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the above illustrative embodiments are merely illustrative and are not intended to limit the scope of the present application thereto. Various changes and modifications may be made therein by one of ordinary skill in the art without departing from the scope and spirit of the application. All such changes and modifications are intended to be included within the scope of the present application as set forth in the appended claims.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, e.g., the division of the elements is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple elements or components may be combined or integrated into another device, or some features may be omitted or not performed.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in order to streamline the application and aid in understanding one or more of the various inventive aspects, various features of the application are sometimes grouped together in a single embodiment, figure, or description thereof in the description of exemplary embodiments of the application. However, the method of the present application should not be construed as reflecting the following intent: i.e., the claimed application requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this application.

It will be understood by those skilled in the art that all of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or units of any method or apparatus so disclosed, may be combined in any combination, except combinations where the features are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The application may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.

Claims (10)

1. A screen structure, comprising:

a screen frame;

the mesh cloth comprises a first area, a second area and a third area in sequence in a first direction, wherein the first area, the second area and the third area comprise a first group of mesh wires, the first group of mesh wires comprise a plurality of mesh wires which are parallel to each other and extend along the first direction, the first area further comprises a second group of mesh wires which are interwoven with the first group of mesh wires, no mesh wire interwoven with the first group of mesh wires exists in the second area, the third area further comprises a third group of mesh wires which are interwoven with the first group of mesh wires, and the mesh cloth is connected with the mesh frame at two ends of the first direction;

and the mask layer is positioned in the second area of the mesh cloth and/or at least one side of the second area, and a plurality of pattern openings are formed in the mask layer.

2. The screen structure of claim 1, wherein,

at least one end of the mesh cloth in a second direction perpendicular to the first direction is provided with a gap with a preset size with the mesh frame; or alternatively, the first and second heat exchangers may be,

at least one end of the mesh cloth in a second direction perpendicular to the first direction is connected with the mesh frame through polyester mesh cloth.

3. The screen structure of claim 1, wherein,

at least one end of the mesh cloth in a second direction perpendicular to the first direction is provided with a reinforcing rib extending along the first direction, and two ends of the reinforcing rib are connected with a mesh frame;

the area between one side of strengthening rib keeping away from the screen cloth with the screen frame is covered through polyester screen cloth.

4. A screen structure according to claim 3, wherein,

the reinforcing ribs are a plurality of mutually parallel metal wires, and the wire diameter of the metal wires is larger than that of the wires in the second area; or alternatively, the first and second heat exchangers may be,

the reinforcing ribs are metal strips.

5. The screen structure of any one of claims 1 to 4, wherein,

the first area comprises a first subarea and a second subarea, two ends of the first subarea in the first direction are respectively connected with the second subarea and the second area, the first subarea comprises a first group of net wires and a second group of net wires, the first group of net wires and the second group of net wires are metal net wires, two ends of the second subarea in the first direction are respectively connected with the net frame and the first subarea, the second subarea comprises at least two groups of net wires which are interwoven with each other, and the net wires of the second subarea are polyester net wires;

the third region comprises a third sub-region and a fourth sub-region, the two ends of the third sub-region in the first direction are respectively connected with the second region and the fourth sub-region, the third sub-region comprises a first group of net wires and a third group of net wires, the first group of net wires and the third group of net wires are metal net wires, the two ends of the fourth sub-region in the first direction are respectively connected with the third sub-region and the net frame, the fourth sub-region comprises at least two groups of net wires which are mutually interwoven, and the net wires of the fourth sub-region are polyester net wires.

6. The screen structure of any one of claims 1 to 4, wherein,

the tension of the mesh of the second region in the first direction is greater than the tension in a second direction, the second direction being perpendicular to the first direction.

7. The screen structure of any one of claims 1 to 4, wherein,

the area of the second region is greater than 40% of the area of the mesh.

8. The screen structure of any one of claims 1 to 4, wherein,

in the second region of the web, the distances between adjacent wires are equal.

9. The screen structure of claim 8, wherein,

in the second region of the web, at least a portion of the mesh is removed.

10. The screen structure of any one of claims 1 to 4, wherein,

the mask layer is a film or a polyimide film;

the pattern openings on the mask layer are formed by laser ablation;

at least one of the pattern openings is located between two adjacent wires in the second region.