A low-cost composite material screen and its manufacturing method

Abstract

The present invention proposes a low-cost composite material screen, including a polymer mesh, a composite film layer, a metal mesh and a polymer adhesive film, wherein the polymer mesh is bonded to the third bonding area of ​​the composite film layer, and the metal mesh is bonded to the first bonding area thereof, so that there is no overlapping area between the metal mesh and the polymer mesh in the thickness direction, so that the size of the expensive metal mesh can be smaller, and in addition, the polymer adhesive film is reliably bonded to the composite film layer, so that the reliability of the screen is ensured while reducing the cost. The present invention also proposes a method for making a low-cost composite material screen, and on the basis of ensuring the reliability of the screen, the manufacturing process is flexibly selected.

Description

Technical Field

[0001] The invention relates to the field of screen printing, and in particular to a low-cost composite material screen and a manufacturing method thereof. Background Art

[0002] Existing printing screens generally include a screen frame, a silk screen, a polymer material layer and a composite layer, as well as a leak-proof layer. Due to differences in physical properties and temperature resistance limitations, the polymer material layer and the composite layer cannot be formed as one piece, and a leak-proof layer needs to be formed by filling the separation area between the two with photocuring or heat-curing materials. The process is complicated and there are many uncertain factors.

[0003] In addition, during the use of this type of printing screen, the photocuring or heat-curing material area is prone to wear, ink or slurry leakage and deformation, and it is easy to cause damage when squeezed by foreign objects, which will seriously affect the printing quality and shorten the life of the printing screen. However, precision printing fields such as the microelectronics industry and the solar energy industry require higher precision and longer life, as well as better printability and more stable process capabilities, so the existing printing screens can no longer meet the requirements. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a low-cost composite material screen and a manufacturing method thereof.

[0005] The main contents of the present invention include:

[0006] A low-cost composite material screen, comprising a screen frame, a polymer mesh, a composite film layer and a composite metal layer; the composite metal layer comprises a metal mesh and a polymer film arranged on the printing surface of the metal mesh; the polymer mesh comprises a first part in the shape of a Chinese umbilical cord and a second part surrounding the outer periphery of the first part; the composite film layer comprises a first bonding area in the shape of a Chinese umbilical cord, a second bonding area surrounding the outer periphery of the first bonding area and a third bonding area surrounding the outer periphery of the second bonding area; the printing surface of the first part is bonded to the scraper surface of the third bonding area; the printing surface of the first bonding area is bonded to the scraper surface of the metal mesh; the polymer film is attached to the printing surface of the metal mesh, and its edge is at least partially bonded to the second bonding area and / or the third bonding area.

[0007] Preferably, the width of the second bonding area is not less than 0 mm.

[0008] Preferably, the width of the first bonding area is 10-15 mm.

[0009] Preferably, the edge of the polymer film is at least partially attached to the second bonding area and / or the third bonding area to form an overlapping area, and the width of the overlapping area is greater than 10 mm.

[0010] Preferably, the printing surface of the composite film layer corresponding to the overlapping area is flush with the printing surface of the metal mesh cloth.

[0011] Preferably, the composite film layer and the polymer film are made of materials with the same or similar physical properties.

[0012] Preferably, the material of the composite film layer and the high-resolution adhesive film is one or more of PET, PE, PA, PI, PU, ​​PVC, PP, PTFE, PMMA, PS, and EVOH.

[0013] A low-cost method for making a composite material screen includes the following steps:

[0014] S1. Select composite film layers and polymer films with the same or similar physical properties;

[0015] S2. Determine the size of the metal mesh according to the size of the opening pattern to be printed;

[0016] S3 prepares the polymer mesh, so that it is reserved for the first part of the composite film layer in a back shape;

[0017] S3. Prepare a metal composite layer, wherein the metal composite layer comprises a metal mesh with or without a polymer film attached to its printing surface;

[0018] S4. Combining the polymer mesh with the metal composite layer through the composite film layer, so that the scraper surface of the metal mesh is attached to the printing surface of the first bonding area of ​​the composite film layer, and the scraper surface of the third bonding area of ​​the composite film layer is combined with the printing surface of the polymer mesh to obtain a composite mesh;

[0019] S5. The composite net is stretched and fixed to a net frame by a tension force.

[0020] Preferably, in S3, when the metal composite layer includes a metal mesh cloth having a polymer film attached to its printing surface, before combining it with the polymer mesh cloth, it also includes the step of bonding the polymer film to the printing surface of the metal mesh cloth, so that the edge of the polymer film extends to the periphery of the metal mesh cloth, so that the edge of the polymer film is at least partially bonded to the second bonding area and / or the third bonding area of ​​the composite film layer; and the metal composite layer has a formed opening pattern.

[0021] Preferably, in S3, when the metal composite layer includes a metal mesh cloth whose printing surface is not attached with a polymer film, the polymer mesh cloth is combined with the metal mesh cloth through the composite film layer, and then after S5, the polymer film is adhered to the printing surface of the metal mesh cloth, and its edge is at least partially adhered to the second bonding area and / or the third bonding area of ​​the composite film layer, and finally the opening pattern is obtained by processing.

[0022] The beneficial effect of the present invention is that: the present invention proposes a low-cost composite material screen and a method for making the same, by bonding the metal mesh cloth to the first bonding area of ​​the composite film layer and bonding the polymer mesh cloth to the third bonding area of ​​the composite film layer, so that there is no overlapping area between the metal mesh cloth and the polymer mesh cloth in the thickness direction, so that the size of the expensive metal mesh cloth can be smaller, and in addition, the polymer film and the composite film layer are reliably bonded, so as to ensure the reliability of the screen and at the same time achieve the purpose of reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a cross-sectional view of the present invention;

[0024] Description of the drawings: 1-screen frame; 2-polymer mesh; 21-first part; 22-second part; 3-composite film layer; 31-first bonding area; 32-second bonding area; 33-third bonding area; 4-metal mesh; 5-polymer film; S1-scraper surface; S2-printing surface. DETAILED DESCRIPTION

[0025] The technical solution protected by the present invention is described in detail below with reference to the accompanying drawings.

[0026] See also Figure 1 The present invention firstly proposes a low-cost composite material screen, which can reduce the use of expensive metal mesh while meeting the reliability requirements, thereby saving the cost of the screen.

[0027] Specifically, the composite material screen of the present invention includes a screen frame 1, a polymer mesh 2, a composite film layer 3 and a composite metal layer; for better description, the side of each layer of the screen facing the scraper is called the scraper surface S1, and the side facing the substrate is called the printing surface S2.

[0028] The composite metal layer includes a metal mesh 4 and a polymer film 5 arranged on the printing surface of the metal mesh 4; the polymer mesh 2 is a U-shaped structure. In order to better describe the corresponding relationship between it, the composite film layer 3 and the metal mesh 4, the U-shaped structure is respectively a first U-shaped part 21 and a second part 22 surrounding the first part 21; similarly, the composite film layer 3 is also a U-shaped structure, which includes a first U-shaped bonding area 31, a second bonding area 32 surrounding the first bonding area 31, and a third bonding area 3 surrounding the second bonding area 32. 3; the composite film layer 3 can bond the metal mesh 4 to the center of the first part 21 of the polymer mesh 2; and in order to reduce the amount of metal mesh 4, the size of the metal mesh 4 is made as small as possible, so that after bonding with the polymer mesh 2, there is no overlapping area between its edge and the inner edge of the polymer mesh 2; that is, the printing surface of the first part 21 is bonded with the scraper surface of the third bonding area 33; the printing surface of the first bonding area 31 is bonded with the scraper surface of the metal mesh 4, and since a second bonding area 32 is arranged between the first bonding area 31 and the third bonding area 33, the above structure can be realized. In one embodiment, the width of the second bonding area 32 is not less than 0mm. When the width of the second bonding area 32 is equal to 0, that is, in the thickness direction, the edge of the metal mesh 4 and the edge of the U-shaped polymer mesh 2 are located on the same straight line, that is, they are just overlapped.

[0029] In order to ensure the reliability of the bonding and minimize the amount of the metal mesh 4, the width of the first bonding area 31 is 10-15 mm, that is, the edge of the composite film layer 3 has a certain width from the edge of the printed pattern area.

[0030] In order to ensure the reliability of the screen and avoid the leakage between the polymer mesh 2 and the metal mesh 4, when the polymer film 5 is attached to the printing surface of the metal mesh 4, its edge should be at least partially attached to the second bonding area 32 and / or the third bonding area 33. Figure 1 As shown, the polymer film 5 is located at a portion where the metal mesh cloth 4 is bonded to the entire second bonding area 32 and a portion of the third bonding area 33 .

[0031] Furthermore, the edge of the polymer film 5 is at least partially attached to the second bonding area 32 and / or the third bonding area 33 to form an overlapping area, and the width of the overlapping area is greater than 10 mm, which plays a role in ensuring the bonding force between the polymer film 5 and the composite film layer 3.

[0032] In order to even out the pressure during printing and further ensure the quality of printing, the printing surface of the overlapping area corresponding to the composite film layer 3 is flush with the printing surface of the metal mesh cloth 4 .

[0033] Furthermore, in order to make the composite film layer 3 and the polymer film 5 better fit, the composite film layer 3 and the polymer film 5 are made of materials with the same or similar physical properties. In one embodiment, the composite film layer 3 and the polymer film 5 are made of one or more of PET, PE, PA, PI, PU, ​​PVC, PP, PTFE, PMMA, PS, and EVOH.

[0034] The following is a detailed description of a method for making the above-mentioned low-cost composite material screen, including the following steps:

[0035] S1. Select composite film layers and polymer films with the same or similar physical properties; "same physical properties" here especially means that when high-temperature baking is performed, the composite film layer and the polymer film can withstand the same or similar temperature without affecting their respective viscosity.

[0036] S2. Determine the size of the metal mesh according to the size of the opening pattern to be printed; make the edge of the metal mesh have a certain distance from the edge of the required opening pattern, so as to ensure the reliability of the fitting and reduce the amount of metal mesh used.

[0037] S3. Prepare a polymer mesh cloth so as to reserve a first portion in the shape of a Chinese character “U” for bonding with the composite film layer.

[0038] S3. Prepare a metal composite layer, wherein the metal composite layer includes a metal mesh cloth with or without a polymer film attached to its printing surface; that is, the metal composite layer may be a metal mesh cloth without a polymer film in one case, and may be a metal mesh cloth with a polymer film attached in another case.

[0039] S4. Combining the polymer mesh with the metal composite layer through the composite film layer, so that the scraper surface of the metal mesh is attached to the printing surface of the first bonding area of ​​the composite film layer, and the scraper surface of the third bonding area of ​​the composite film layer is combined with the printing surface of the polymer mesh to obtain a composite mesh;

[0040] S5. The composite net is stretched and fixed to a net frame by a tension force.

[0041] Furthermore, when the metal composite layer includes a metal mesh cloth with a polymer film attached to its printing surface, before combining it with the polymer mesh cloth, it also includes the step of bonding the polymer film to the printing surface of the metal mesh cloth, so that the edge of the polymer film extends to the periphery of the metal mesh cloth, so that the edge of the polymer film is at least partially bonded to the second bonding area and / or the third bonding area of ​​the composite film layer; and the metal composite layer has a formed opening pattern; when the metal composite layer is bonded to the polymer mesh cloth through the composite film layer, on the one hand, the first bonding area of ​​the composite film layer is bonded to the metal mesh cloth, and the third bonding area thereof is bonded to the polymer mesh cloth; on the other hand, it is also necessary to ensure that the edge of the polymer film is at least partially bonded to its second bonding area and / or the third bonding area.

[0042] In other embodiments, when the metal composite layer includes a metal mesh cloth whose printing surface is not attached with a polymer film, the polymer mesh cloth is combined with the metal mesh cloth through the composite film layer, and then after S5, the polymer film is adhered to the printing surface of the metal mesh cloth, and its edge is at least partially adhered to the second bonding area and / or the third bonding area of ​​the composite film layer, and finally the opening pattern is obtained by processing.

[0043] Through the above structure, not only the amount of metal mesh can be reduced, but also the bonding process can be flexibly selected. One way is to first compound the polymer film with the metal mesh to obtain a metal composite layer containing an opening pattern, and then bond the metal composite layer to the polymer mesh. Users do not need to perform further processing, which simplifies user use; another way is to bond the metal mesh to the polymer mesh and then compound the polymer film to meet the needs of users for special opening patterns. The whole process does not require filling with caulking glue, etc., and the reliability of the screen can be guaranteed, which simplifies the production process.

[0044] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A low-cost composite material screen, characterized in that: It includes a screen frame, a polymer mesh cloth, a composite film layer and a composite metal layer; the composite metal layer includes a metal mesh cloth and a polymer adhesive film provided on the printing surface of the metal mesh cloth; the polymer mesh cloth includes a first part in a zigzag shape and a second part surrounding the outer periphery of the first part; the composite film layer includes a first bonding area in a zigzag shape, a second bonding area surrounding the outer periphery of the first bonding area and a third bonding area surrounding the outer periphery of the second bonding area; the printing surface of the first part is attached to the doctor blade surface of the third bonding area; the printing surface of the first bonding area is attached to the doctor blade surface of the metal mesh cloth; the polymer adhesive film is attached to the printing surface of the metal mesh cloth, and its edge is at least partially attached to the second bonding area and / or the third bonding area; The width of the first bonding area is 10 - 15 mm; The composite film layer and the polymer adhesive film are made of materials with the same or similar physical properties.

2. A low-cost composite material screen according to claim 1, characterized in that: The edge of the polymer adhesive film is at least partially attached to the second bonding area and / or the third bonding area to form an overlapping area, and the width of the overlapping area is greater than 10 mm.

3. A low-cost composite material screen according to claim 2, characterized in that: The printing surface of the composite film layer corresponding to the overlapping area is flush with the printing surface of the metal mesh cloth.

4. A low-cost composite material screen according to claim 1, characterized in that: The materials of the composite film layer and the polymer adhesive film are one or several of PET, PE, PA, PI, PU, PVC, PP, PTFE, PMMA, PS, EVOH.

5. A method for making a low-cost composite material screen as claimed in any one of claims 1 to 4, characterized in that: It includes the following steps: S1. Select a composite film layer and a polymer adhesive film with the same or similar physical properties; S2. Determine the size of the metal mesh cloth according to the size of the opening pattern to be printed; S3. Prepare a polymer mesh cloth, and leave a first part in a zigzag shape for attaching to the composite film layer; S3. Prepare a metal composite layer, and the metal composite layer includes a metal mesh cloth with a polymer adhesive film attached or not attached to its printing surface; S4. Combine the polymer mesh cloth and the metal composite layer through the composite film layer, so that the doctor blade surface of the metal mesh cloth is attached to the printing surface of the first bonding area of the composite film layer, and the doctor blade surface of the third bonding area of the composite film layer is combined with the printing surface of the polymer mesh cloth to obtain a composite mesh; S5. Stretch and fix the above composite mesh to a screen frame by a tension.

6. The method for making a low-cost composite material screen according to claim 5, characterized in that: In S3, when the metal composite layer includes a metal mesh cloth with a polymer adhesive film attached to its printing surface, before combining it with the polymer mesh cloth, it further includes the step of attaching the polymer adhesive film to the printing surface of the metal mesh cloth, so that the edge of the polymer adhesive film extends to the outer periphery of the metal mesh cloth, so that the edge of the polymer adhesive film is at least partially attached to the second bonding area and / or the third bonding area of the composite film layer; and the metal composite layer has a formed opening pattern.

7. The method for making a low-cost composite material screen according to claim 5, characterized in that: In S3, when the metal composite layer includes a metal mesh cloth with no polymer adhesive film attached to its printing surface, combine the polymer mesh cloth and the metal mesh cloth through the composite film layer, and after S5, attach the polymer adhesive film to the printing surface of the metal mesh cloth, and make its edge at least partially attached to the second bonding area and / or the third bonding area of the composite film layer, and finally process to obtain an opening pattern.

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