Preparation method of metal net

Abstract

The invention discloses a preparation method of a metal net, which comprises the following steps of: putting a metal coarse net with an anti-corrosion layer into a corrosion tank to corrode a metal part of the metal coarse net, which is positioned outside the anti-corrosion layer, so that the width of a metal coarse line of the metal coarse net is effectively reduced, and the opening area of a single grid opening of the metal coarse net is increased; according to the method, the coarse metal mesh can be rapidly prepared into the metal mesh with thin metal lines and large opening area of a single mesh opening, so that the opening rate of the metal mesh is increased, the production efficiency is greatly improved, and the production cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of metal mesh, in particular to a method for preparing the metal mesh. Background Art

[0002] Existing metal meshes generally have a grid structure, and the metal mesh has multiple metal lines arranged in a cross pattern. The metal mesh has a variety of materials, and metal meshes made of different metal materials have different properties and can be used in different scenarios. For example, metal meshes made of steel can be used in the construction field for reinforcement or as fences; metal meshes made of nickel use nickel and can be used in printing or perforated film manufacturing and other fields; metal meshes made of copper or silver can be used on photovoltaic cells in the photovoltaic industry, and the crossed metal lines of the metal mesh can play the role of main grid lines and fine grid lines, realizing the convergence and output of current generated by photovoltaic cells.

[0003] When manufacturing the existing metal mesh, generally the metal wires are stretched and then fixed to form the metal mesh; if the width of the metal wires is smaller and the density of the number of metal wires is greater, the manufacturing difficulty is greater.

[0004] In view of the existence of the above problems, it is necessary to study a method for preparing a metal mesh, which can conveniently prepare a metal mesh with a small metal wire width and a large opening rate. Summary of the invention

[0005] The object of the present invention is to provide a method for preparing a metal mesh, which can conveniently prepare a metal mesh with a small metal wire width and a large opening rate.

[0006] In order to achieve the above object, the solution of the present invention is: A method for preparing a metal mesh comprises the following steps: Step 1: Clean the surface of the coarse metal mesh; the coarse metal mesh adopts a closed grid structure formed by a plurality of coarse metal lines; Step 2: coating the protective ink on the upper surface and the lower surface of each metal coarse line of the metal coarse mesh, so that the upper surface and the lower surface of the metal coarse mesh are both compounded with an anti-corrosion layer, the anti-corrosion layer adopts a closed grid structure composed of a plurality of anti-corrosion lines, the anti-corrosion lines are formed by the protective ink, and the width of the anti-corrosion lines is less than or equal to 0.8 mm and less than the width of the metal coarse lines; each anti-corrosion line of the anti-corrosion layer located on the upper surface of the metal coarse mesh corresponds to each anti-corrosion line of the anti-corrosion layer located on the lower surface of the metal coarse mesh; Step 3: placing a metal coarse mesh having an anti-corrosion layer on both the upper and lower surfaces in a corrosion tank for etching, thereby forming a metal mesh having the anti-corrosion layer on both the upper and lower surfaces; the metal mesh adopts a closed grid structure composed of a plurality of metal lines, and the width of the metal lines is less than or equal to 0.8 mm; Step 4: Cleaning the metal mesh having the anti-corrosion layer on both the upper and lower surfaces to remove the anti-corrosion layer on the upper and lower surfaces of the metal mesh.

[0007] The material of the metal coarse mesh is copper, silver, aluminum, nickel or alloy.

[0008] The surface of the metal coarse mesh is provided with a coating.

[0009] The plating layer is a copper plating layer, a silver plating layer, a tin plating layer or a nickel plating layer.

[0010] The multiple metal coarse lines of the metal coarse mesh include multiple first metal coarse lines and multiple second metal coarse lines that are cross-arranged, the number density of the first metal coarse lines is 5 to 15 lines / cm, and the number density of the second metal coarse lines is 0.2 to 4 lines / cm; the multiple anti-corrosion lines of the anti-corrosion layer include multiple first anti-corrosion lines and multiple second anti-corrosion lines that are cross-arranged, the width of the first anti-corrosion line is smaller than the width of the first metal coarse line and the width of the first line is less than or equal to 0.035 mm, the width of the second anti-corrosion line is smaller than the width of the second metal coarse line and the width of the second line is greater than or equal to 0.035 mm.

[0011] The multiple anti-corrosion lines of the anti-corrosion layer also include at least one third anti-corrosion line interspersed between the first anti-corrosion lines, and the width of the third anti-corrosion line is greater than the width of the first anti-corrosion line; and when the number of third anti-corrosion lines of the anti-corrosion layer is greater than or equal to two, at least one first anti-corrosion line is spaced between adjacent third anti-corrosion lines.

[0012] When the number of the third anti-corrosion lines of the anti-corrosion layer is greater than or equal to two, the widths of the third anti-corrosion lines are the same, completely different, or not exactly the same.

[0013] The multiple anti-corrosion lines of the anti-corrosion layer also include frame anti-corrosion lines connected to the multiple first anti-corrosion lines and / or the multiple second anti-corrosion lines, and the width of the frame anti-corrosion lines is greater than or equal to 0.2 mm.

[0014] After adopting the above scheme, the present invention adopts an etching process to prepare the metal mesh, and corrodes the metal part of the metal coarse mesh outside the anti-corrosion layer through a chemical corrosion method, thereby effectively reducing the width of the coarse metal lines of the metal coarse mesh and increasing the opening area of ​​a single grid opening of the metal coarse mesh, and then quickly preparing the metal coarse mesh into a metal mesh with finer metal lines and a large opening area of ​​a single grid opening, which not only improves the opening rate of the metal mesh, but also greatly improves the production efficiency and reduces the production cost.

[0015] The present invention can accurately control the thickness and opening rate of the metal lines of the metal mesh through the etching process, so that the metal lines are uniform and unbroken, thereby ensuring the quality stability of the product, and can also improve the use efficiency of the metal mesh and extend its service life; at the same time, the present invention can coat anti-corrosion lines of different widths on the same metal coarse mesh, so that the same metal coarse mesh can be etched to obtain a metal mesh with different metal line widths, which can not only meet the needs of certain special applications, such as fine grids and main grids in photovoltaic metal meshes, but also improve the strength of the metal mesh and prevent the problem of metal line breakage during the application or transportation of the metal mesh. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a flow chart of the preparation of the metal mesh of the present invention; Figure 2 This is a schematic diagram of a metal coarse mesh coated with an anti-corrosion layer in Example 1 of the present invention; Figure 3 is a schematic diagram of a metal mesh according to Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of a metal coarse mesh coated with an anti-corrosion layer in the second embodiment of the present invention; Figure 5 is a schematic diagram of a metal mesh according to a second embodiment of the present invention; Figure 6 This is a schematic diagram of a metal coarse mesh coated with an anti-corrosion layer in Embodiment 3 of the present invention; Figure 7 is a schematic diagram of a metal mesh according to a third embodiment of the present invention; Figure 8 This is a schematic diagram of a metal coarse mesh coated with an anti-corrosion layer in Embodiment 4 of the present invention; Fig. 9 is a schematic diagram of a metal mesh according to a fourth embodiment of the present invention; Explanation of symbols: A metal coarse mesh 1, a first metal coarse line 11, a second metal coarse line 12, Metal mesh 1', first metal line 11', second metal line 1', third metal line 13', frame metal line 14', Anti-corrosion layer 2, first anti-corrosion line 21, second anti-corrosion line 22, third anti-corrosion line 23, frame anti-corrosion line 24. DETAILED DESCRIPTION

[0017] like Figures 1 to 9 As shown, the present invention discloses a method for preparing a metal mesh, which comprises the following steps: Step 1: cleaning the surface of the metal coarse mesh 1 (such as cleaning with a detergent or grinding and polishing) to remove dirt and oil stains on the surface of the metal coarse mesh 1 and keep the surface of the metal coarse mesh 1 clean; the metal coarse mesh 1 adopts a closed grid structure formed by a plurality of metal coarse lines; Step 2: coating the protective ink on the upper and lower surfaces of each metal coarse line of the metal coarse mesh 1, so that the upper and lower surfaces of the metal coarse mesh 1 are both compounded with the anti-corrosion layer 2, the anti-corrosion layer 2 adopts a closed grid structure composed of a plurality of anti-corrosion lines, the anti-corrosion lines are formed by the protective ink, the width of the anti-corrosion lines is less than the width of the metal coarse lines and the width of the anti-corrosion lines is less than or equal to 0.8 mm; each anti-corrosion line of the anti-corrosion layer 2 located on the upper surface of the metal coarse mesh 1 corresponds to each other with each anti-corrosion line of the anti-corrosion layer 2 located on the lower surface of the metal coarse mesh 1; Step 3: placing the metal coarse mesh 1 having the anti-corrosion layer 2 on both the upper and lower surfaces in a corrosion tank for etching, thereby forming a metal mesh 1' having the anti-corrosion layer 2 on both the upper and lower surfaces; the metal mesh 1' adopts a closed grid structure composed of a plurality of metal lines, and the width of the metal lines is less than or equal to 0.8 mm; Step 4: Clean the metal mesh 1' with the anti-corrosion layer 2 on both the upper and lower surfaces (such as by cleaning with a solvent, alkali solution or other cleaning agents) to remove the anti-corrosion layer 2 on the upper and lower surfaces of the metal mesh 1'.

[0018] In the present invention, the material of the metal coarse mesh 1 can be copper, silver, aluminum, nickel or alloy, and the surface of the metal coarse mesh 1 can have a coating, which can be a copper coating, a silver coating, a tin coating or a nickel coating. The metal coarse mesh 1 can be a sheet or a coil; the shape of the mesh openings of the metal coarse mesh 1 can be circular, elliptical, triangular or polygonal, and the shape is not limited.

[0019] In the present invention, the widths of the multiple anti-corrosion lines of the anti-corrosion layer 2 may be the same, completely different or not exactly the same. The multiple anti-corrosion lines of the anti-corrosion layer 2 correspond to the multiple metal lines of the metal mesh 1' one by one. In the present invention, the anti-corrosion layer 2 can apply the protective ink on the surface of the coarse metal mesh 1 by roller coating, wherein: the surface of the coating anilox roller is pre-set with a liquid-carrying mesh corresponding to the coarse metal lines of the coarse metal mesh 1, and meshes with different liquid amounts can be designed to coat and form anti-corrosion lines of different widths, thereby obtaining metal lines of different widths.

[0020] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.

[0021] Embodiment 1 Cooperate Figures 1 to 3As shown, in the first embodiment of the present invention, a method for preparing a metal mesh of the present invention specifically comprises the following steps: Step 1: cleaning the surface of the metal coarse mesh 1 to remove dirt and oil stains on the surface of the metal coarse mesh 1 and keep the surface of the metal coarse mesh 1 clean; the metal coarse mesh 1 adopts a closed grid structure formed by a plurality of metal coarse lines; the metal coarse mesh 1 is in a honeycomb mesh shape; Step 2: coating the protective ink on the upper and lower surfaces of each metal coarse line of the metal coarse mesh 1, so that the upper and lower surfaces of the metal coarse mesh 1 are both compounded with the anti-corrosion layer 2, the anti-corrosion layer 2 adopts a closed grid structure composed of a plurality of anti-corrosion lines, the anti-corrosion lines are formed by the protective ink, the width of the anti-corrosion lines is less than the width of the metal coarse lines and the width of the anti-corrosion lines is less than or equal to 0.8 mm; each anti-corrosion line of the anti-corrosion layer 2 located on the upper surface of the metal coarse mesh 1 corresponds to each other with each anti-corrosion line of the anti-corrosion layer 2 located on the lower surface of the metal coarse mesh 1; the anti-corrosion layer 2 is in a honeycomb mesh shape; Step 3: placing the metal coarse mesh 1 with the anti-corrosion layer 2 on both the upper and lower surfaces in a corrosion tank for etching, thereby forming a metal mesh 1' with the anti-corrosion layer 2 on both the upper and lower surfaces; the metal mesh 1' adopts a closed grid structure composed of a plurality of metal lines, and the width of the metal lines is less than or equal to 0.8 mm; the metal mesh 1' is in a honeycomb mesh shape; Step 4: Clean the metal mesh 1' with the anti-corrosion layer 2 on both the upper and lower surfaces by using a solvent, alkali solution or other cleaning agent to remove the anti-corrosion layer 2 on the upper and lower surfaces of the metal mesh 1'.

[0022] In the first embodiment of the present invention, the present invention adopts an etching process to prepare the metal mesh 1', and the metal part of the metal coarse mesh 1 outside the anti-corrosion layer 2 is corroded by a chemical corrosion method, thereby effectively reducing the width of the metal coarse lines of the metal coarse mesh 1 and increasing the opening area of ​​a single mesh opening of the metal coarse mesh 1, and then quickly preparing the metal coarse mesh 1 into a metal mesh 1' with finer metal lines and a large opening area of ​​a single mesh opening, which not only improves the opening rate of the metal mesh 1', but also greatly improves the production efficiency and reduces the production cost. In addition, the present invention can accurately control the thickness and opening rate of the metal lines of the metal mesh 1' through the etching process, so that the metal lines are uniform and unbroken, thereby ensuring the quality stability of the product, and can also improve the use efficiency of the metal mesh 1' and extend its service life.

[0023] In the first embodiment of the present invention, the parameters of the preparation method of a metal mesh of the present invention are: the material of the metal coarse mesh 1 is copper, the width of the anti-corrosion line of the anti-corrosion layer 2 is 0.3 mm, and the width of the metal line c of the prepared metal mesh 1' is 0.3 mm. Embodiment 2: Cooperate Figure 1, Figure 4 and Figure 5 As shown, in the second embodiment of the present invention, a method for preparing a metal mesh 1' of the present invention specifically comprises the following steps: Step 1: cleaning the surface of the metal coarse mesh 1 to remove stains and oil stains on the surface of the metal coarse mesh 1 and keep the surface of the metal coarse mesh 1 clean; the metal coarse mesh 1 adopts a closed grid structure formed by a plurality of metal coarse lines; the plurality of metal coarse lines of the metal coarse mesh 1 include a plurality of first metal coarse lines 11 and a plurality of second metal coarse lines 12 arranged crosswise, the number density of the first metal coarse lines 11 is 5 to 15 lines / cm, and the number density of the second metal coarse lines 12 is 0.2 to 4 lines / cm; Step 2: coating the protective ink on the upper and lower surfaces of each metal coarse line of the metal coarse mesh 1, so that the upper and lower surfaces of the metal coarse mesh 1 are both compounded with the anti-corrosion layer 2, the anti-corrosion layer 2 adopts a closed grid structure composed of a plurality of anti-corrosion lines, the anti-corrosion lines are formed by the protective ink, the width of the anti-corrosion lines is less than the width of the metal coarse lines and the width of the anti-corrosion lines is less than or equal to 0.8mm; each anti-corrosion line of the anti-corrosion layer 2 located on the upper surface of the metal coarse mesh 1 corresponds to each other on the lower surface of the metal coarse mesh 1; the plurality of anti-corrosion lines of the anti-corrosion layer 2 include a plurality of first anti-corrosion lines 21 and a plurality of second anti-corrosion lines 22 arranged crosswise, the width of the first anti-corrosion line 21 is less than the width of the first metal coarse line 11 and the width of the first line is less than or equal to 0.035mm, the width of the second anti-corrosion line 22 is less than the width of the second metal coarse line 12 and the width of the second line is greater than or equal to 0.035mm; Step 3: placing the metal coarse mesh 1 having the anti-corrosion layer 2 on both the upper and lower surfaces in a corrosion tank for etching, thereby forming a metal mesh 1' having the anti-corrosion layer 2 on both the upper and lower surfaces; the metal mesh 1' adopts a closed grid structure composed of a plurality of metal lines, the plurality of metal lines of the metal mesh 1' include a plurality of first metal lines 11' and a plurality of second metal lines 12' arranged crosswise, the width of the first metal line 11' is less than the width of the first metal coarse line 11 and the width of the first line is less than or equal to 0.035 mm, the width of the second metal line 12' is less than the width of the second metal coarse line 12 and the width of the second line is greater than or equal to 0.035 mm; Step 4: Clean the metal mesh 1' with the anti-corrosion layer 2 on both the upper and lower surfaces by using a solvent, alkali solution or other cleaning agent to remove the anti-corrosion layer 2 on the upper and lower surfaces of the metal mesh 1'.

[0024] In the second embodiment of the present invention, by coating the first anti-corrosion lines 21 and the second anti-corrosion lines 22 of different widths on the same coarse metal mesh 1, a metal mesh 1' having first metal lines 11' and second metal lines 12' of different widths can be etched on the same coarse metal mesh 1. This can not only meet the needs of certain special applications, such as fine grids and main grids in photovoltaic metal meshes 1', but also improve the strength of the metal mesh 1' and prevent the metal lines from breaking during application or transportation.

[0025] In the second embodiment of the present invention, the arrangement of the metal thick lines of the metal coarse mesh 1 determines the arrangement of the metal lines in the pre-prepared metal mesh 1'. The widths of the metal thick lines of the metal coarse mesh 1 can be the same or different, that is, the widths of the first metal thick line 11 and the second metal thick line 12 in the second embodiment can be the same or different. If a metal mesh 1' with different metal line widths is required, it can be achieved by simply adjusting the width of the anti-corrosion line on the metal coarse mesh 1.

[0026] In the second embodiment of the present invention, the parameters of the preparation method of a metal mesh of the present invention are as follows: the metal coarse mesh 1 adopts a nickel mesh plated with a copper layer on the surface; the width of the first anti-corrosion line 21 of the anti-corrosion layer 2 is 0.035mm, and the number density is 10 lines / cm; the width of the second anti-corrosion line 22 is 0.05mm, and the number density is 1 line / cm. The width of the first metal line 11' of the prepared metal mesh 1' is 0.035mm, and the number density is 10 lines / cm; the width of the second metal line 12' is 0.05mm, and the number density is 1 line / cm.

[0027] Embodiment three: Cooperate Figure 1 , Figure 6 and Figure 7 As shown, in the third embodiment of the present invention, a method for preparing a metal mesh of the present invention specifically comprises the following steps: Step 1: cleaning the surface of the metal coarse mesh 1 to remove stains and oil stains on the surface of the metal coarse mesh 1 and keep the surface of the metal coarse mesh 1 clean; the metal coarse mesh 1 adopts a closed grid structure formed by a plurality of metal coarse lines; the plurality of metal coarse lines of the metal coarse mesh 1 include a plurality of first metal coarse lines 11 and a plurality of second metal coarse lines 12 arranged crosswise, the number density of the first metal coarse lines 11 is 5 to 15 lines / cm, and the number density of the second metal coarse lines 12 is 0.2 to 4 lines / cm; Step 2: Apply protective ink to the upper and lower surfaces of each metal coarse line of the metal coarse mesh 1, so that the upper and lower surfaces of the metal coarse mesh 1 are compounded with an anti-corrosion layer 2, the anti-corrosion layer 2 adopts a closed grid structure composed of multiple anti-corrosion lines, the anti-corrosion lines are formed by protective ink, the width of the anti-corrosion lines is less than the width of the metal coarse lines and the width of the anti-corrosion lines is less than or equal to 0.8mm; each anti-corrosion line of the anti-corrosion layer 2 located on the upper surface of the metal coarse mesh 1 corresponds to each other on the lower surface of the metal coarse mesh 1; the multiple anti-corrosion lines of the anti-corrosion layer 2 include multiple first anti-corrosion lines 21 and multiple second anti-corrosion lines 22 arranged crosswise, and interspersed At least one third anti-corrosion line 23 is arranged between the first anti-corrosion lines 21, the width of the first anti-corrosion line 21 is less than the width of the first thick metal line 11 and the first line width is less than or equal to 0.035 mm, the width of the second anti-corrosion line 22 is less than the width of the second thick metal line 12 and the second line width is greater than or equal to 0.035 mm; the width of the third anti-corrosion line 23 is greater than the width of the first anti-corrosion line 21; and when the number of the third anti-corrosion lines 23 is greater than or equal to two, there is at least one first anti-corrosion line 21 between adjacent third anti-corrosion lines 23, and the widths of the third anti-corrosion lines 23 may be the same, completely different or different; Step 3: placing the metal coarse mesh 1 having the anti-corrosion layer 2 on both the upper and lower surfaces in a corrosion tank for etching, thereby forming a metal mesh 1' having the anti-corrosion layer 2 on both the upper and lower surfaces; the metal mesh 1' adopts a closed grid structure composed of a plurality of metal lines, the plurality of metal lines of the metal mesh 1' include a plurality of first metal lines 11' and a plurality of second metal lines 12' arranged crosswise, and a third metal line 13' interlaced between the first metal lines 11', the width of the first metal line 11' is less than the width of the first metal coarse line 11 and the width of the first line is less than or equal to 0.035 mm, the width of the second metal line 12' is less than the width of the second metal coarse line 12 and the width of the second line is greater than or equal to 0.035 mm, and the width of the third metal line 13' is greater than the width of the first metal line 11'; Step 4: Clean the metal mesh 1' with the anti-corrosion layer 2 on both the upper and lower surfaces by using a solvent, alkali solution or other cleaning agent to remove the anti-corrosion layer 2 on the upper and lower surfaces of the metal mesh 1'.

[0028] In the third embodiment of the present invention, since the anti-corrosion layer 23 has at least one third anti-corrosion line 23 interspersed between the first anti-corrosion lines 21, and the width of the third anti-corrosion line 23 is greater than the width of the first anti-corrosion line 21, after etching, the portion of the metal coarse mesh 1 covered by the third anti-corrosion line 23 forms the third metal line 13' of the metal mesh 1', and the width of the third metal line 13' is wider than the first metal line 11' of the metal mesh 1'. Therefore, the third metal line 13' can play a supporting role in the metal mesh 1', which can increase the strength of the metal mesh 1' and effectively prevent the problem of metal line breakage during use of the metal mesh 1'.

[0029] In the third embodiment of the present invention, the parameters of the preparation method of a metal mesh of the present invention are as follows: the metal coarse mesh 1 adopts a copper mesh with a silver-plated layer on the surface; the width of the first anti-corrosion line 21 of the anti-corrosion layer 2 is 0.03mm, and the number density is 5 lines / cm; the width of the second anti-corrosion line 22 is 0.04mm, and the number density is 2 lines / cm; the width of the third anti-corrosion line 23 is 0.1mm; the width of the first metal line 11' of the prepared metal mesh 1' is 0.03mm, and the number density is 5 lines / cm; the width of the second metal line 12' is 0.04mm, and the number density is 2 lines / cm; the width of the third metal line 13' is 0.1mm.

[0030] Embodiment 4: Cooperate Figure 1 , Figure 8 and Fig. 9 As shown, in the fourth embodiment of the present invention, a method for preparing a metal mesh 1' of the present invention specifically comprises the following steps: Step 1: cleaning the surface of the metal coarse mesh 1 to remove stains and oil stains on the surface of the metal coarse mesh 1 and keep the surface of the metal coarse mesh 1 clean; the metal coarse mesh 1 adopts a closed grid structure formed by a plurality of metal coarse lines; the plurality of metal coarse lines of the metal coarse mesh 1 include a plurality of first metal coarse lines 11 and a plurality of second metal coarse lines 12 arranged crosswise, the number density of the first metal coarse lines 11 is 5 to 15 lines / cm, and the number density of the second metal coarse lines 12 is 0.2 to 4 lines / cm; Step 2: coating the protective ink on the upper and lower surfaces of each metal coarse line of the metal coarse mesh 1, so that the upper and lower surfaces of the metal coarse mesh 1 are both composited with the anti-corrosion layer 2, the anti-corrosion layer 2 adopts a closed grid structure composed of a plurality of anti-corrosion lines, the anti-corrosion lines are formed by the protective ink, the width of the anti-corrosion lines is less than the width of the metal coarse lines and the width of the anti-corrosion lines is less than or equal to 0.8 mm; each anti-corrosion line of the anti-corrosion layer 2 located on the upper surface of the metal coarse mesh 1 corresponds to each other with each anti-corrosion line of the anti-corrosion layer 2 located on the lower surface of the metal coarse mesh 1; the plurality of anti-corrosion lines of the anti-corrosion layer 2 are The anti-corrosion lines include a plurality of first anti-corrosion lines 21 and a plurality of second anti-corrosion lines 22 arranged crosswise, and a frame anti-corrosion line 24 connected to the plurality of first anti-corrosion lines 21 and / or the plurality of second anti-corrosion lines 22, the width of the first anti-corrosion line 21 is less than the width of the first thick metal line 11 and the first line width is less than or equal to 0.035 mm, the width of the second anti-corrosion line 22 is less than the width of the second thick metal line 12 and the second line width is greater than or equal to 0.035 mm, and the width of the frame anti-corrosion line 24 is greater than or equal to 0.2 mm; Step 3: placing the metal coarse mesh 1 having the anti-corrosion layer 2 on both the upper and lower surfaces in a corrosion tank for etching, thereby forming a metal mesh 1' having the anti-corrosion layer 2 on both the upper and lower surfaces; the metal mesh 1' adopts a closed grid structure composed of a plurality of metal lines, the plurality of metal lines of the metal mesh 1' include a plurality of first metal lines 11' and a plurality of second metal lines 12' arranged crosswise, and a frame metal line 14' connected to the plurality of first metal lines 11' and / or the plurality of second metal lines 12', the width of the first metal line 11' is less than the width of the first metal coarse line 11 and the width of the first line is less than or equal to 0.035 mm, the width of the second metal line 12' is less than the width of the second metal coarse line 12 and the width of the second line is greater than or equal to 0.035 mm, and the width of the frame metal line 14' is greater than or equal to 0.2 mm; Step 4: Clean the metal mesh 1' with the anti-corrosion layer 2 on both the upper and lower surfaces by using a solvent, alkali solution or other cleaning agent to remove the anti-corrosion layer 2 on the upper and lower surfaces of the metal mesh 1'.

[0031] In the fourth embodiment of the present invention, the anti-corrosion layer 2 has a frame anti-corrosion line 24 connected to the plurality of first anti-corrosion lines 21 and / or the plurality of second anti-corrosion lines 22 and having a width greater than or equal to 0.2 mm, so that after etching, the portion of the coarse metal mesh 1 covered by the frame anti-corrosion line 24 forms a frame metal line 14' of the metal mesh 1', and the frame metal line 14' can be located around the first metal line 11'c1 and the second metal line 12'. Since the width of the frame metal line 14' is relatively large, it can be cut according to the frame line when used, and can provide good strength to the metal mesh 1' when processing and taking the metal mesh 1', effectively preventing damage to the metal lines in the metal mesh 1'.

[0032] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A method for preparing a metal mesh, characterized in that: The steps include: Step 1: Clean the surface of the coarse metal mesh; the coarse metal mesh adopts a closed grid structure formed by a plurality of coarse metal lines; Step 2: coating the protective ink on the upper surface and the lower surface of each metal coarse line of the metal coarse mesh, so that the upper surface and the lower surface of the metal coarse mesh are both compounded with an anti-corrosion layer, the anti-corrosion layer adopts a closed grid structure composed of a plurality of anti-corrosion lines, the anti-corrosion lines are formed by the protective ink, and the width of the anti-corrosion lines is less than or equal to 0.8 mm and less than the width of the metal coarse lines; each anti-corrosion line of the anti-corrosion layer located on the upper surface of the metal coarse mesh corresponds to each anti-corrosion line of the anti-corrosion layer located on the lower surface of the metal coarse mesh; Step 3: placing a metal coarse mesh having an anti-corrosion layer on both the upper and lower surfaces in a corrosion tank for etching, thereby forming a metal mesh having the anti-corrosion layer on both the upper and lower surfaces; the metal mesh adopts a closed grid structure composed of a plurality of metal lines, and the width of the metal lines is less than or equal to 0.8 mm; Step 4: Cleaning the metal mesh having the anti-corrosion layer on both the upper and lower surfaces to remove the anti-corrosion layer on the upper and lower surfaces of the metal mesh.

2. A method for preparing a metal mesh according to claim 1, characterized in that: The material of the metal coarse mesh is copper, silver, aluminum, nickel or alloy.

3. The method for preparing a metal mesh according to claim 1, characterized in that: The surface of the metal coarse mesh is provided with a coating.

4. A method for preparing a metal mesh according to claim 3, characterized in that: The plating layer is a copper plating layer, a silver plating layer, a tin plating layer or a nickel plating layer.

5. The method for preparing a metal mesh according to claim 1, characterized in that: The plurality of thick metal lines of the thick metal mesh include a plurality of first thick metal lines and a plurality of second thick metal lines arranged crosswise, the number density of the first thick metal lines is 5 to 15 lines / cm, and the number density of the second thick metal lines is 0.2 to 4 lines / cm; The multiple anti-corrosion lines of the anti-corrosion layer include multiple first anti-corrosion lines and multiple second anti-corrosion lines that are cross-arranged, the width of the first anti-corrosion line is smaller than the width of the first metal thick line and the first line width is less than or equal to 0.035mm, the width of the second anti-corrosion line is smaller than the width of the second metal thick line and the second line width is greater than or equal to 0.035mm.

6. A method for preparing a metal mesh according to claim 5, characterized in that: The multiple anti-corrosion lines of the anti-corrosion layer also include at least one third anti-corrosion line interspersed between the first anti-corrosion lines, and the width of the third anti-corrosion line is greater than the width of the first anti-corrosion line; and when the number of third anti-corrosion lines of the anti-corrosion layer is greater than or equal to two, at least one first anti-corrosion line is spaced between adjacent third anti-corrosion lines.

7. A method for preparing a metal mesh according to claim 6, characterized in that: When the number of the third anti-corrosion lines of the anti-corrosion layer is greater than or equal to two, the widths of the third anti-corrosion lines are the same, completely different, or not exactly the same.

8. The method for preparing a metal mesh according to claim 5, characterized in that: The multiple anti-corrosion lines of the anti-corrosion layer also include frame anti-corrosion lines connected to the multiple first anti-corrosion lines and / or the multiple second anti-corrosion lines, and the width of the frame anti-corrosion lines is greater than or equal to 0.2 mm.

Images