Novel etching solution for refining wire diameter of stainless steel wire mesh and treatment method

Abstract

The invention discloses a novel stainless steel mesh wire diameter refining etching solution and a processing method, S1, using a degreasing agent and a ghost agent to scrub the surface of stainless steel mesh cloth for 3-5 min, then using water to wash, then using an air gun to blow-dry, and finally drying; s2, the degreased stainless steel screen cloth is immersed in an etching solution for electrocatalytic etching, titanium meshes serve as cathodes to be arranged on the two faces of a screen printing plate, a smooth titanium plate serves as an anode for electric conduction, the stainless steel screen cloth makes contact with the titanium plate for etching, meanwhile, a magnetic stirring device is started, the etching solution is dispersed more evenly, and the etching time ranges from 2 min to 5 min; s3, washing the etched stainless steel screen with water, then blow-drying the stainless steel screen with an air gun, and finally drying the stainless steel screen; the etching liquid comprises nitric acid, ammonium bifluoride, ammonium persulfate, thiourea, polyethylene glycol, a conductive agent and deionized water, so that the wire diameter of the stainless steel screen cloth can be reduced in a short time, and all the components are common chemicals, so that the etching liquid can be used and stored under correct conditions.

Description

Technical Field

[0001] The invention relates to the technical field of wire mesh, in particular to a novel etching solution and a processing method for refining the wire diameter of a stainless steel mesh. Background Art

[0002] Solar cell silver grid lines typically require screen printing to apply low-temperature silver paste to silicon wafers. Stainless steel, due to its high strength, is the best choice for screen printing mesh. In recent years, with the increasing demand for solar cell efficiency, the precision requirements for screen printing have also increased. Therefore, a stainless steel mesh with a smaller wire diameter is needed to achieve the required printing accuracy.

[0003] At present, there are technical barriers to low-wire-diameter stainless steel mesh on the market at home and abroad. The supply of low-wire-diameter stainless steel mesh imported from abroad is difficult to guarantee and the price is high. In addition, stainless steel etching can better refine the mesh wire diameter, but chemical etching takes a long time, has a great impact on the strength of the mesh, and the surface brightness of the mesh after etching is poor.

[0004] Therefore, it is necessary to provide a novel etching solution and treatment method for refining the wire diameter of stainless steel mesh to solve the above technical problems. Summary of the Invention

[0005] The present invention overcomes the shortcomings of the prior art and provides a novel etching solution and treatment method for refining the wire diameter of a stainless steel mesh.

[0006] To achieve the above-mentioned object, the technical solution adopted by the present invention is: a novel etching solution and treatment method for reducing the diameter of stainless steel mesh, comprising the following components;

[0007] Calculate by weight and weigh the following raw materials:

[0008] 20-40 parts nitric acid

[0009] 7-15 parts of ammonium bifluoride

[0010] 3-6 parts ammonium persulfate

[0011] 1-3 parts of thiourea

[0012] 2-5 parts polyethylene glycol

[0013] 2-3 parts conductive agent

[0014] 1-50 parts of deionized water.

[0015] In a preferred embodiment of the present invention, the concentration of nitric acid is 20-50%.

[0016] In a preferred embodiment of the present invention, the molecular weight of the polyethylene glycol is 200-20,000.

[0017] In a preferred embodiment of the present invention, the conductive agent includes, but is not limited to, ammonium sulfate and ammonium phosphate.

[0018] In a preferred embodiment of the present invention, a method for etching a new type of stainless steel mesh cloth includes the following steps:

[0019] S1. Scrub the surface of the stainless steel mesh cloth with a degreasing agent and a ghosting agent for 3 - 5 minutes, then rinse with water for 1 - 2 minutes, then dry with an air gun for 30 - 60 seconds, and finally dry in an oven.

[0020] S2. Immerse the degreased stainless steel mesh cloth in an etching solution for electrocatalytic etching. Among them, a titanium mesh is used as the cathode on both sides of the screen plate, a smooth titanium plate is used as the anode for conducting electricity, and the stainless steel mesh cloth contacts the titanium plate for etching. At the same time, turn on the magnetic stirring device to make the etching solution disperse more evenly. The etching time is 2 - 5 minutes.

[0021] S3. Rinse the etched stainless steel screen plate with water for 1 - 2 minutes, then dry with an air gun for 1 - 2 minutes, and finally dry in an oven.

[0022] In a preferred embodiment of the present invention, in the S1, the mass ratio of the degreasing agent to the ghosting agent is 1:1, the drying temperature range is 70 - 90 °C, and the time is 5 - 10 minutes.

[0023] In a preferred embodiment of the present invention, in the S2, when the degreased screen plate is put into the etching solution for electrocatalytic etching, the temperature is 15 - 25 °C, and the mesh number of the titanium mesh is 10 - 100 meshes.

[0024] In a preferred embodiment of the present invention, in the S2, the current density is 10 - 50 A / cm².

[0025] In a preferred embodiment of the present invention, in the S2, the rotation speed of the magnetic stirring device is 200 - 600 r / min.

[0026] In a preferred embodiment of the present invention, in the S3, the drying temperature during drying is 70 - 90 °C, and the time is 5 - 10 minutes.

[0027] The present invention solves the defects existing in the background technology, and the present invention has the following beneficial effects:

[0028] (1) The present invention provides an etching solution and a treatment method for thinning the wire diameter of a new type of stainless steel mesh cloth. By setting the components of the etching solution as nitric acid, ammonium bifluoride, ammonium persulfate, thiourea, polyethylene glycol, a conductive agent, and deionized water, it can not only reduce the wire diameter of the stainless steel mesh cloth in a short time, but also each component is a common chemical, and the etching solution has stable properties under correct use and storage conditions.

[0029] (2) The present invention provides a novel etching solution and treatment method for refining the wire diameter of stainless steel mesh cloth. Through the etching method of stainless steel mesh cloth, fine treatment of the mesh cloth is achieved through three steps: degreasing of the mesh cloth, electrocatalytic etching, and rinsing and drying. In the degreasing step of the mesh cloth, a degreasing agent and a ghosting agent with a mass ratio of 1:1 are used, which can effectively remove impurities and oil stains on the surface of the mesh cloth and provide a good foundation for subsequent etching. During the electrocatalytic etching process, the uniformity and efficiency of the etching reaction are ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings;

[0031] Figure 1 is the metallographic diagram of the wire diameter of the stainless steel mesh cloth after degreasing in Embodiment 1 of the present invention;

[0032] Figure 2 is the metallographic diagram of the surface of the stainless steel mesh cloth prepared in Embodiment 1 of the present invention;

[0033] Figure 3 is the metallographic diagram of the wire diameter of the stainless steel mesh cloth prepared in Embodiment 1 of the present invention;

[0034] Figure 4 is the metallographic diagram of the wire diameter of the stainless steel mesh cloth prepared in Comparative Example 1 of the present invention;

[0035] Figure 5 is the metallographic diagram of the surface of the stainless steel mesh cloth prepared in Comparative Example 2 of the present invention;

[0036] Figure 6 is the metallographic diagram of the wire diameter of the stainless steel mesh cloth prepared in Comparative Example 2 of the present invention;

[0037] Figure 7 is the process schematic diagram of the preferred embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0039] In the following description, many specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited by the specific embodiments disclosed below.

[0040] As Figures 1-6 shown, the present invention provides an etching solution for refining the wire diameter of a new type of stainless steel mesh, comprising the following components;

[0041] By weight, the following preparation raw materials are weighed:

[0042] 20 - 40 parts of nitric acid

[0043] 7 - 15 parts of ammonium bifluoride

[0044] 3 - 6 parts of ammonium persulfate

[0045] 1 - 3 parts of thiourea

[0046] 2 - 5 parts of polyethylene glycol

[0047] 2 - 3 parts of conductive agent

[0048] 1 - 50 parts of deionized water.

[0049] In this embodiment, the concentration of nitric acid is 20 - 50%, the molecular weight of polyethylene glycol is 200 - 20000, and the conductive agent includes but is not limited to ammonium sulfate and ammonium phosphate.

[0050] It should be noted that: As the main component, nitric acid is controlled at a concentration of 20 - 50%. When etching with stainless steel, it can not only ensure the etching ability but also avoid excessive corrosion of the stainless steel mesh due to too high a concentration, ensuring a stable and controllable etching process. Ammonium bifluoride enhances the erosion ability of the etching solution on the stainless steel surface and synergizes with components such as nitric acid to make the etching more uniform, contributing to the realization of wire diameter refinement. Ammonium persulfate accelerates the etching reaction with its strong oxidizing property, improving the etching speed and ensuring consistent effects. Thiourea, as a corrosion inhibitor, protects the surface of the stainless steel mesh, prevents over-etching, controls the degree of wire diameter refinement, and improves the etching quality. Polyethylene glycol with a molecular weight of 200 - 20000 improves the dispersibility and wettability of the etching solution, enabling the etching solution to better contact the mesh surface and ensuring uniform etching. The conductive agent composed of one or a combination of two of ammonium sulfate and ammonium phosphate improves the conductivity of the etching solution, provides a good conductive environment for electrocatalytic etching, and ensures the smooth progress of the reaction. In addition, deionized water added in a proportion of 1 - 50 parts as a solvent can adjust the concentration and viscosity of the etching solution, enable the components to be fully dissolved and dispersed, avoid interference from impurities in the water during the etching process, and ensure the pure and stable etching effect.

[0051] The present invention provides a method for etching a new type of stainless steel mesh, characterized by comprising the following steps:

[0052] S1. Scrub the surface of the stainless steel mesh cloth with a degreaser and a ghost remover. The mass ratio of the degreaser to the ghost remover is 1:1, and the time is 3 - 5 minutes. Then rinse with water for 1 - 2 minutes, blow dry with an air gun for 30 - 60 seconds, and finally dry at a temperature range of 70 - 90°C for 5 - 10 minutes.

[0053] S2. Immerse the degreased stainless steel mesh cloth in the etching solution for electrocatalytic etching. The temperature is 15 - 25°C, and the mesh count of the titanium mesh is 10 - 100 meshes. The titanium mesh is used as the cathode on both sides of the screen plate, and a smooth titanium plate is used as the anode for conduction. The stainless steel mesh cloth contacts the titanium plate for etching. At the same time, turn on the magnetic stirring device to make the etching solution disperse more evenly. The rotation speed of the magnetic stirring device is 200 - 600 r / min, the current density is 10 - 50 A / cm², and the etching time is 2 - 5 minutes.

[0054] S3. Rinse the etched stainless steel screen plate with water for 1 - 2 minutes, then blow dry with an air gun for 1 - 2 minutes, and finally dry at a temperature of 70 - 90°C for 5 - 10 minutes.

[0055] It should be noted that: in step S1, scrubbing the surface of the mesh cloth with a degreaser and a ghost remover with a mass ratio of 1:1 can effectively remove grease, dirt and impurities, make the etching solution better contact with the stainless steel surface, and improve the uniformity and adhesion of etching; subsequent water rinsing, air gun drying and drying at 70 - 90°C for 5 - 10 minutes ensure that the surface of the mesh cloth is clean and dry and will not be damaged due to excessive temperature. In step S2, immerse the degreased mesh cloth in the etching solution. The temperature of 15 - 25°C provides a suitable environment for the reaction; the 10 - 100 - mesh titanium mesh as the cathode is placed on both sides of the screen plate, and the smooth titanium plate as the anode conducts electricity, making the current evenly distributed to achieve uniform etching; the magnetic stirring device with a rotation speed of 200 - 600 r / min makes the etching solution disperse more evenly, ensuring synchronous reaction; controlling the current density of 10 - 50 A / cm 2 ² and the etching time of 2 - 5 minutes can achieve the refinement of the wiring diameter to meet different production requirements. In step S3, rinsing, air gun drying and drying at 70 - 90°C for 5 - 10 minutes of the etched screen plate can remove the residual etching solution and impurities, ensure the surface cleanliness, stabilize the performance of the mesh cloth, and improve the product quality and stability.

[0056] Example 1:

[0057] The weight parts of the components of the etching solution are as follows: 30 parts of nitric acid, 10 parts of ammonium bifluoride, 5 parts of ammonium persulfate, 2 parts of thiourea, 3 parts of polyethylene glycol, and 30 parts of deionized water.

[0058] Among them, the concentration of nitric acid is 35%, the molecular weight of polyethylene glycol is 15000, and the conductive agent is ammonium sulfate.

[0059] The etching method of the new type of stainless steel mesh cloth includes the following steps:

[0060] S1. Scrub the surface of the stainless steel mesh cloth with a degreasing agent and a ghosting agent. The mass ratio of the degreasing agent to the ghosting agent is 1:1, and the time is 5 minutes. Then rinse with water for 1 minute, then dry with an air gun for 30 seconds, and finally dry in an oven. The drying temperature range is 80°C, and the time is 5 minutes;

[0061] S2. Immerse the degreased stainless steel mesh cloth in the etching solution for electrocatalytic etching. The temperature is 20°C, and the mesh number of the titanium mesh is 50 mesh. Among them, the titanium mesh is used as the cathode and placed on both sides of the screen plate, and the smooth titanium plate is used as the anode for conduction. The stainless steel mesh cloth contacts the titanium plate for etching. At the same time, turn on the magnetic stirring device to make the etching solution more evenly dispersed. The rotation speed of the magnetic stirring device is 500 r / min, the current density is 30 A / cm², and the etching time is 3 minutes;

[0062] S3. Rinse the etched stainless steel screen plate with water for 1 minute, then dry with an air gun for 1 minute, and finally dry in an oven. The drying temperature during drying is 80°C, and the time is 5 minutes.

[0063] Example 2:

[0064] This example is basically the same as Example 1, the difference is that: the weight parts of the components of the etching solution are as follows: 30 parts of nitric acid, 10 parts of ammonium bifluoride, 5 parts of ammonium persulfate, 2 parts of thiourea, 3 parts of polyethylene glycol, 30 parts of deionized water;

[0065] Among them, the concentration of nitric acid is 35%, the molecular weight of polyethylene glycol is 200, and the conductive agent is ammonium sulfate.

[0066] Example 3:

[0067] This example is basically the same as Example 1, the difference is that: the weight parts of the components of the etching solution are as follows: 30 parts of nitric acid, 10 parts of ammonium bifluoride, 5 parts of ammonium persulfate, 2 parts of thiourea, 3 parts of polyethylene glycol, 30 parts of deionized water;

[0068] Among them, the concentration of nitric acid is 35%, the molecular weight of polyethylene glycol is 20000, and the conductive agent is ammonium sulfate.

[0069] Example 4:

[0070] This example is basically the same as Example 1, the difference is that: the weight parts of the components of the etching solution are as follows: 25 parts of nitric acid, 8 parts of ammonium bifluoride, 4 parts of ammonium persulfate, 1.5 parts of thiourea, 2.5 parts of polyethylene glycol, 2.2 parts of conductive agent, 15 parts of deionized water.

[0071] Among them, the concentration of nitric acid is 35%, the molecular weight of polyethylene glycol is 15000, and the conductive agent is ammonium sulfate.

[0072] Experiment 1:

[0073] Etching rate experiment: Prepare several stainless steel mesh cloths of the same specification, and perform etching operations according to the methods of Examples 1-4 respectively.

[0074] Weigh the stainless steel mesh cloth before and after etching respectively, record the etching time, and calculate the etching rate based on the mass change and etching time.

[0075] The calculation formula for the etching rate is:

[0076]

[0077] Among them, the mass of the stainless steel mesh cloth before etching is m1 (unit: g), the mass of the stainless steel mesh cloth after etching is m2 (unit: g), the etching time is t (unit: min), and the etching rate is υ (unit: g / min).

[0078] Then the calculation formula for the etching rate is expressed by the mathematical expression as:

[0079] Etching uniformity experiment: Observe the surface of the etched stainless steel mesh cloth using a microscope, select multiple different positions to measure the etching depth; calculate the standard deviation of the etching depth, and the smaller the standard deviation, the more uniform the etching.

[0080] Surface roughness experiment: Measure the surface roughness of the etched stainless steel mesh cloth using a surface roughness instrument.

[0081] Group Etching Rate (g / min) Standard Deviation of Etching Depth (μm) Surface Roughness (μm) Example 1 0.25 0.12 0.20 Example 2 0.22 0.15 0.23 Example 3 0.23 0.14 0.22 Example 4 0.21 0.16 0.24

[0082] As can be seen from Table 1:

[0083] Example 1 shows good etching effect. In terms of the etching solution formula, the molecular weight of polyethylene glycol is 15000. This value can appropriately adjust the surface tension and viscosity of the etching solution, enabling the etching solution to spread evenly on the surface of the stainless steel mesh cloth. At the same time, the proportions of components such as nitric acid, ammonium bifluoride, and ammonium persulfate are coordinated, and the components promote each other, ensuring that the etching reaction can proceed smoothly and the reaction rate can be controlled within an ideal range;

[0084] Example 2 and Example 3 are inferior to Example 1 in terms of etching effect, mainly due to the difference in the molecular weight of polyethylene glycol. In Example 2, the molecular weight of polyethylene glycol is only 200. Such a low molecular weight limits its effectiveness in adjusting the performance of the etching solution, and it cannot make the etching solution evenly distributed on the surface of the mesh cloth like in Example 1, thus affecting the etching uniformity and rate. In Example 3, the molecular weight of polyethylene glycol is as high as 20,000. Such a high molecular weight is also not conducive to the optimization of the etching solution performance, and it is difficult to reach the optimal state during the etching process, resulting in an etching effect inferior to that of Example 1.

[0085] In Example 4, the weight parts of each component of the etching solution were adjusted, and the changed component ratio disrupted the originally good synergistic effect among the components. This imbalance in the ratio made the progress of the etching reaction not smooth enough, and it could not etch the stainless steel mesh cloth as efficiently and evenly as in Example 1. In terms of key indicators such as etching rate, etching uniformity, and surface roughness, Example 4 showed disadvantages, so the effect was inferior to that of Example 1.

[0086] Comparative Example 1:

[0087] This example is basically the same as Example 1, and the difference is that: in the weight part components of the etching solution, compared with Example 1, the conductive agent is not added.

[0088] Comparative Example 2:

[0089] This example is basically the same as Example 1, and the difference is that: in step S2, the degreased mesh cloth is put into the etching solution for etching, and at the same time, the magnetic stirring device is turned on to make the etching solution more evenly dispersed.

[0090] Experiment 2:

[0091] Use a metallographic microscope to measure the wire diameter of the mesh cloth in Example 1, Comparative Example 1, and Comparative Example 2.

[0092] Table 2: From Figures 1-6 it can be seen

[0093]

[0094] As can be seen from Table 2:

[0095] The wire diameters of the wire meshes in Example 1 are generally lower than those in Comparative Example 1 and Comparative Example 2. Most of the wire diameters in Comparative Example 1 are above 9.00μm. The wire diameters in Comparative Example 2 fluctuate greatly, but are also higher than those in Example 1 as a whole. This shows that the etching method in Example 1 can more effectively reduce the wire diameters of the wire meshes and achieve a finer etching effect. Moreover, the wire diameter uniformity is simply judged by observing the data fluctuations. The data in Example 1 are relatively concentrated within a certain range; although the data in Comparative Example 1 have a small difference, the overall wire diameter is large; the data in Comparative Example 2 fluctuate significantly, and the wire diameter uniformity is the worst. Therefore, when achieving a relatively fine wire diameter of the wire mesh, the wire diameter uniformity in Example 1 is also better.

[0096] Figure 1 It is the metallographic diagram of the wire diameter of the stainless steel wire mesh after step S1 of Example 1. Figure 3 It is the metallographic diagram of the surface wire diameter of the stainless steel wire mesh prepared in Example 1. The wire diameter of the wire mesh is measured using a metallographic microscope and compared. Figure 1 and Figure 3 It can be seen that the wire diameters of the stainless steel wire meshes prepared by the present invention have been greatly reduced, and the wire diameter uniformity is good, and the etching effect is uniform and stable. It is proved that the etching solution and the electrocatalytic etching method of the present invention have a stable effect and high quality.

[0097] Among them, when comparing Figure 4 the stainless steel wire diameter prepared by the etching solution and the electrocatalytic etching method shown in Comparative Example 1 with Figure 3 the stainless steel wire diameter prepared in Example 1, the wire diameter of the stainless steel wire mesh is higher and the uniformity is poorer. It is proved that the conductive agent can effectively improve the current efficiency and reduce the etching time.

[0098] When comparing Figure 6 the stainless steel wire mesh diameter prepared by the etching solution and the electrocatalytic etching method described in Comparative Example 2 with Figure 3 the stainless steel wire mesh diameter prepared in Example 1, it can be seen that under the same time, the wire mesh diameter of the traditional etching is significantly higher than that of the electrocatalytic etching, and the wire diameter uniformity is poorer. It is proved that the etching method of the present invention has good stability and high efficiency, and greatly shortens the etching time of the stainless steel wire mesh.

[0099] Table 3: It can be seen from Figures 1-6 It can be known that

[0100]

[0101] It can be seen from Table 3 that:

[0102] In terms of surface roughness, Example 1 shows the best performance, presenting the characteristics of low roughness, smooth and delicate surface; while Comparative Example 1 has a rough surface, and Comparative Example 2 also has a relatively high roughness, not as smooth as Example 1. In terms of surface brightness, Example 1 has a high brightness, Comparative Example 1 has a low brightness, and although it is not clear for Comparative Example 2, it is speculated that it is not as good as Example 1. For surface defects, there are no obvious scratches, pitting and other problems in Example 1, there are many scratches and a small amount of pitting in Comparative Example 1, and there are scratches and occasional pitting in Comparative Example 2. In terms of etching time, Example 1 has a short etching time, reflecting high efficiency, while Comparative Example 1 and Comparative Example 2 have long etching times.

[0103] Figure 2 Figure 4 is the surface metallographic diagram of the stainless steel mesh cloth prepared in Example 1, and it can be seen from Figure 2 that the surface brightness of the stainless steel mesh cloth prepared by the etching solution and etching method of the present invention is relatively high, and there are no obvious scratches, proving that the stainless steel etching solution and electrocatalytic etching method of the present invention have high quality.

[0104] Comparison Figure 5 The surface of the stainless steel mesh cloth prepared by the etching solution and electrocatalytic etching method described in Comparative Example 1 and Figure 2 compared with the surface of the stainless steel mesh cloth prepared in Example 1, it can be seen that the surface of the stainless steel mesh cloth by traditional etching is relatively rough, with poor brightness and many scratches on the surface, while the surface of the stainless steel mesh cloth prepared by the etching method of the present invention is smooth and delicate, with high brightness, and has no defects such as scratches or pitting, proving that the etching method of the present invention has extremely high quality.

[0105] Considering all indicators, Example 1 has significant advantages in both surface quality and etching efficiency, and can achieve a smooth and delicate surface effect, relatively high brightness, extremely few surface defects and a short etching time.

[0106] Based on the ideal embodiments of the present invention as inspiration, through the above description, relevant personnel can fully make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A novel etching solution for refining the wire diameter of stainless steel mesh, characterized in that, It comprises the following components; Weigh the following preparation raw materials by weight parts: 20 - 40 parts of nitric acid 7 - 15 parts of ammonium bifluoride 3 - 6 parts of ammonium persulfate 1 - 3 parts of thiourea 2 - 5 parts of polyethylene glycol 2 - 3 parts of conductive agent 1 - 50 parts of deionized water.

2. An etching solution for thinning the wire diameter of a new type of stainless steel mesh wiring according to claim 1, characterized in that: The concentration of the nitric acid is 20 - 50%.

3. An etching solution for thinning the wire diameter of a new type of stainless steel mesh wiring according to claim 1, characterized in that: The molecular weight of the polyethylene glycol is 200 - 20000.

4. An etching solution for thinning the wire diameter of a new type of stainless steel mesh wiring according to claim 1, characterized in that: The conductive agent includes but is not limited to ammonium sulfate and ammonium phosphate.

5. A method for etching a novel stainless steel mesh cloth according to any one of claims 1-4, characterized in that, It includes the following steps: S1. Scrub the surface of the stainless - steel mesh cloth with a degreaser and a ghost remover for 3 - 5 min, then rinse with water for 1 - 2 min, then dry with an air gun for 30 - 60 s, and finally dry in an oven; S2. Immerse the degreased stainless - steel mesh cloth in the etching solution for electro - catalytic etching. The titanium mesh is used as the cathode on both sides of the screen, the smooth titanium plate is used as the anode for conducting electricity, and the stainless - steel mesh cloth contacts the titanium plate for etching. At the same time, turn on the magnetic stirring device to make the etching solution more evenly dispersed. The etching time is 2 - 5 min; S3. Rinse the etched stainless - steel screen plate with water for 1 - 2 min, then dry with an air gun for 1 - 2 min, and finally dry in an oven.

6. The etching method of a novel stainless steel mesh cloth according to claim 5, characterized in that: In the said S1, the mass ratio of the degreaser to the ghost remover is 1:1, the drying temperature range is 70 - 90 °C, and the time is 5 - 10 min.

7. An etching method for a new type of stainless steel mesh cloth according to claim 5, characterized in that: In the said S2, when the degreased screen plate is put into the etching solution for electro - catalytic etching, the temperature is 15 - 25 °C, and the mesh number of the titanium mesh is 10 - 100 meshes.

8. The etching method of a novel stainless steel mesh according to claim 5, characterized in that: In the said S2, the current density is 10 - 50 A / cm².

9. A method for etching a novel stainless steel mesh cloth according to claim 5, characterized in that: In the said S2, the rotation speed of the magnetic stirring device is 200 - 600 r / min.

10. A method for etching a new type of stainless steel mesh cloth according to claim 5, characterized in that: In the said S3, the drying temperature during drying is 70 - 90 °C, and the time is 5 - 10 min.

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