A method for producing high-temperature resistant filter media

Abstract

This invention discloses a method for producing filter media, aiming to provide a method for producing high-temperature resistant filter media that can be used in high-temperature environments, has good filtration effect on hazardous waste gases, has strong structural strength, and can be continuously produced. The key technical solution is that the filter media made of polyester fiber, PTFE fiber, or a mixture of both fibers has good surface heat resistance and can be used in high-temperature environments. Furthermore, PTFE emulsion is coated on the surface of the base fabric layer to improve the overall corrosion resistance of the filter media and prevent corrosive particles from adhering to the filter media and affecting the overall filtration effect. The base fabric layer produced according to the above process has good high-temperature resistance and corrosion resistance. At the same time, flexible interlocking bodies are cross-added in the base fabric layer to reinforce the overall filter media. Moreover, the filter media production line is driven by traction rollers and completes production in one go in the assembly line, resulting in high continuity and efficiency. This invention is applicable to the field of filter media processing technology.

Description

Technical Field

[0001] This invention relates to a filter media manufacturing process, and more specifically, to a method for producing a high-temperature resistant filter media. Background Technology

[0002] With the development of my country's economy and the increase in human activity, the production of hazardous waste has increased significantly. Excessive accumulation of hazardous waste can cause serious environmental pollution and threaten human health. Incineration can destroy harmful substances in hazardous waste and significantly reduce its overall volume, facilitating the safe and harmless treatment of hazardous waste. It is currently the fastest and most effective technology for hazardous waste treatment.

[0003] When incinerating hazardous waste, the exhaust gas produced during the incineration process usually needs to be filtered to prevent harmful particulate matter in the incineration gas from entering the atmosphere and polluting the environment. Currently, the treatment method for this gas is to use filter media to filter the gas, so that particulate harmful substances are blocked by the filter media, thereby purifying the incineration gas. However, because the gas produced during incineration is at a high temperature, ordinary filter media have poor filtration effect on harmful substances in a high-temperature environment, and prolonged passage of high-temperature gas through the filter media will cause the filter media to break down and lose its filtration effect.

[0004] Currently, Chinese patent application number 202310032247.0 discloses a method for producing high-temperature filter media for hazardous waste incineration. The aim is to provide a high-temperature filter media for hazardous waste incineration that is resistant to high temperatures and corrosion, has a long service life, and effectively adsorbs harmful substances. The key technical point is the use of a first base fabric layer combined with a first high-temperature resistant base layer and a second high-temperature resistant base layer. The structural arrangement of the first and second high-temperature resistant base layers creates a significant high-temperature resistance effect on the first base fabric layer. Furthermore, the fibers used in the first and second high-temperature resistant base layers, such as glass fiber and asbestos fiber, possess extremely strong high-temperature resistance, making the material highly practical and structurally simple. Additionally, a filler layer is placed between the first and second high-temperature resistant base layers, greatly increasing the stability of the filler layer.

[0005] For example, Chinese Patent Application No. 202320008511.2 discloses a high-temperature filter material for hazardous waste incineration. It includes a base structure, a first high-temperature resistant layer disposed on the windward side of the base structure, and a second high-temperature resistant layer disposed on the leeward side of the base structure. The second high-temperature resistant layer has a supporting structure for reinforcing the overall strength of the windward side. Compared to existing filter materials, this high-temperature filter material for hazardous waste incineration, by setting the first and second high-temperature resistant layers on both sides of the base structure, possesses high-temperature resistance. When filtering excessively hot gas emissions, the filter material is less likely to be damaged under prolonged high-temperature environments, thus extending its service life.

[0006] Although the aforementioned filter media can operate in high-temperature environments, improving performance and lifespan, their lack of a strong internal support structure results in poor overall stability and robustness, thus affecting performance. Furthermore, the production of these filter media is not continuous, requiring them to be transferred between various machines, leading to low production efficiency and potentially impacting product qualification rates. Summary of the Invention

[0007] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a method for producing high-temperature resistant filter media that can be used in high-temperature environments, has good filtration effect on hazardous waste gases, has strong structural strength, and can be continuously produced.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a method for producing high-temperature resistant filter material, comprising a base fabric layer, characterized by comprising the following steps: S1, preparing mixed fibers: preparing polyester fibers or PTFE fibers or a mixture of both fibers, if mixing is required, the mixing ratio of the two fibers is 50:50, and after loosening and mixing the above fibers, mixed fibers are obtained;

[0009] S2. Fiber felt preparation: The obtained mixed fibers are fed into a carding machine to obtain fiber felt for later use. Different numbers of fiber felts are selected according to the required thickness. After cleaning the burrs on both sides of the fiber felt, it is immersed in an impregnation tank filled with PTFE emulsion. After the impregnated fiber felt is taken out, it is double-layer needle punched and compounded. After repeating the compound needle punching multiple times, a fiber composite felt is formed. The fiber composite felt is then coarsely pressed to achieve a suitable thickness for later use.

[0010] S3. Base fabric layer reinforcement: A reinforcement layer is formed by inserting flexible inserts in both the transverse and longitudinal directions of the base fabric layer, and a coating is applied to both sides of the reinforcement layer with a coating thickness of 2mm.

[0011] S4. Laying fiber composite felt: Apply adhesive to the reinforcing layer formed in step S3, and bond the fiber composite felt and the reinforcing layer together under the action of traction rollers to form a semi-finished filter material.

[0012] S5. Cutting grooves: Cut grooves into the semi-finished filter material obtained in step S4. Cut several longitudinal grooves and several transverse grooves on the fiber composite felt using a grooved cutter. The width of the transverse groove is 1 / 2 of the width of the longitudinal groove.

[0013] S6. Preparation of longitudinal and transverse inlays: Prepare porous fibers and twist the porous fiber group into a braid shape to form longitudinal inlays. Place each longitudinal inlay in parallel and place each longitudinal inlay between the two fibers by using a cross-floating and sinking method, so that the two porous fibers form transverse inlays.

[0014] S7. Embedding and compaction: The longitudinal inlay body is embedded in the longitudinal groove to form a longitudinal inlay unit, and the transverse inlay body is embedded in the transverse groove to form a transverse inlay unit. The thickness of the longitudinal inlay body is higher than the groove depth, and the thickness exposed outside the longitudinal groove is between 1 / 3 and 1 / 2 of the groove depth.

[0015] S8. Molding and coating area: After the filter material is embedded, it is flattened with a pressure of 500N for 3-4 times. The longitudinal and transverse inserts form several square coating areas in the longitudinal and transverse grooves.

[0016] S9. Step-by-step adhesive application: First, apply preliminary adhesive to the longitudinal and transverse inserts, as well as the longitudinal and transverse grooves; then, apply adhesive to the square area formed in step S8; finally, apply PTFE surface adhesive to the surface of the filter material to complete the adhesive application.

[0017] S10. Winding and Storage: After the coating has cured and cooled, wind and store the finished filter material from step S9 to complete the processing.

[0018] The present invention is further configured such that the specific reinforcement steps of the base fabric layer in step S3 are as follows: S30, longitudinal perforation of the base fabric layer: the longer side of the base fabric layer is folded at equal intervals to form a base fabric layer block, several through holes are opened on the base fabric layer block along its length direction, and the burrs inside the through holes are cleaned.

[0019] S31. Longitudinal insertion of flexible inserts: Insert flexible inserts into the through holes of the base fabric layer, unfold the base fabric layer, and drip thermoplastic resin into the openings of the base fabric layer to achieve a reinforcement effect.

[0020] S32. Transverse perforation of the base fabric layer: Fold the shorter side of the base fabric layer at equal intervals to form a thick block of the base fabric layer, and make several through holes along its length on the thick block of the base fabric layer, and clean the burrs inside the through holes.

[0021] S33. Lateral insertion of flexible inserts: Insert flexible inserts into the through holes of the base fabric layer, unfold the base fabric layer, and drip thermoplastic resin into the openings of the base fabric layer and the joints of the flexible inserts to form a reinforcing layer.

[0022] The present invention is further configured such that the specific adhesive application steps in step S9 are as follows: S90, preliminary adhesive application: partial application of PTFE adhesive to the periphery of the longitudinal and transverse inlays until the PTFE coating can penetrate into the holes and grooves of each inlay.

[0023] S91, Applying adhesive to the square area: Apply adhesive to the area formed in step S90 using an adhesive applicator until the PTFE coating in the area can be fused with the PTFE coating on each longitudinal and transverse inlay.

[0024] S92, PTFE surface coating: After the coating in step S91 is completed, the surface of the obtained semi-finished product is coated with adhesive again, covering each longitudinal and transverse inlay under the PTFE surface, and then a PTFE film is applied for coating.

[0025] The present invention is further configured such that the mixed fibers in step S1 include glass fibers and carbon fibers.

[0026] The present invention is further configured such that: the flexible insert in step S3 includes a carbon fiber bundle disposed in the middle of the flexible insert, and the outer periphery of the carbon fiber bundle is wrapped with a synthetic mica tape layer and a glass fiber layer.

[0027] The present invention is further configured such that the thermoplastic resin in steps S31 and S33 is a polyolefin resin, and the resin is further provided with glass fibers for reinforcement.

[0028] The present invention is further configured such that the coating in step S9 comprises PTFE emulsion, thermoplastic resin, PTFE fiber and glass fiber.

[0029] The present invention is further configured such that the adhesive in step S4 is one or more of silicate adhesives, phosphate adhesives, metal alkoxide adhesives, and inorganic copper oxide material adhesives.

[0030] By adopting the above technical solution, using polyester fiber, PTFE fiber, or a mixture of both, the polyester fiber and PTFE fiber are lightweight and have strong heat resistance. Filter media made from this material have good surface heat resistance and can be used in high-temperature environments. Furthermore, coating the base fabric layer with PTFE emulsion improves the overall corrosion resistance of the filter media and prevents corrosive particles from adhering to the filter media and affecting the overall filtration effect. The base fabric layer made according to the above process has good high-temperature resistance and corrosion resistance.

[0031] Furthermore, to improve the structural strength of the filter media, flexible inserts are crosswise added within the base fabric layer to reinforce the overall filter media. This is achieved by folding and perforating the base fabric layer, and inserting flexible inserts into the through-holes. These flexible inserts are located inside the base fabric layer, and thermoplastic resin is applied between the flexible inserts and between the flexible inserts and the base fabric layer to connect the flexible inserts and the base fabric layer into a unified structure, ensuring the connection strength of the base fabric layer. Both the perforation of the base fabric layer and the insertion of the flexible inserts can be automatically completed on a machine tool, resulting in a high degree of automation. Simultaneously, a fiber composite felt is laid on the base fabric layer, containing longitudinal and transverse inserts. The inlay is formed by twisting porous fiber groups into a braid shape, resulting in high structural strength. The longitudinal inlay is located inside the transverse inlay, providing a strong overall connection structure. Furthermore, the longitudinal and transverse inlays are coated with adhesive in stages. First, a preliminary adhesive is applied to the longitudinal and transverse inlays, as well as the longitudinal and transverse grooves, allowing the PTFE adhesive to penetrate into the gaps between the fibers and increase the connection strength between the longitudinal and transverse inlays. Subsequently, adhesive is applied to the area between the transverse and longitudinal inlays, allowing the first and second adhesive applications to fuse together. Finally, a film is applied to the overall surface to maximize the overall structural strength and complete the adhesive coating process.

[0032] Meanwhile, in order to prevent the flexible insert from being damaged in high-temperature environments and to improve the structural strength and service life of the filter material, carbon fiber bundles are set in the flexible insert, and a synthetic mica tape layer and a glass fiber layer are wrapped around the outside of the carbon fiber bundles. Both the glass fiber and the synthetic mica tape have good high-temperature resistance, which allows the filter material with the flexible insert to be used in high-temperature environments. At the same time, the carbon fiber bundles inside the flexible insert have strong ductility and tensile strength, resulting in high overall strength.

[0033] Furthermore, in order to achieve continuous production of filter media, the filter media production line is driven by traction rollers. The preparation of fiber composite felt, reinforcement of base fabric layer, bonding of fiber composite felt and base fabric layer, fabrication and compaction of inserts, and coating of filter media are all completed continuously in one go on the production line, resulting in high production efficiency. Attached Figure Description

[0034] Figure 1 This is a flowchart of the processing steps in an embodiment of the production method of a high-temperature resistant filter material according to the present invention;

[0035] Figure 2 This is a flowchart illustrating the base fabric layer reinforcement steps in an embodiment of the production method of a high-temperature resistant filter material according to the present invention.

[0036] Figure 3This is a flowchart illustrating the step-by-step adhesive application process for the longitudinal and transverse inlays of a method for producing high-temperature resistant filter material according to the present invention.

[0037] Figure 4 This is a top view of the base fabric layer in an embodiment of a method for producing high-temperature resistant filter material according to the present invention;

[0038] Figure 5 This is an exploded view of the filter media in an embodiment of a method for producing high-temperature resistant filter media according to the present invention.

[0039] Figure 6 This is a simplified diagram of the production line structure of an embodiment of the production method for high-temperature resistant filter material of the present invention;

[0040] The attached figures are labeled as follows: 1. Base fabric layer; 2. Flexible insert; 3. Traction roller; 4. Adhesive; 5. Longitudinal insert; 6. Transverse insert; 7. PTFE coating. Detailed Implementation

[0041] Reference Figures 1 to 6 The following is a further description of an embodiment of the production method of a high-temperature resistant filter material according to the present invention.

[0042] For ease of explanation, spatial relative terms such as “up,” “down,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “down” of other elements or features would be positioned “up” of those other elements or features. Therefore, the exemplary term “down” can encompass both up and down orientations. The device may be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0043] Moreover, relational terms such as “first” and “second” are used merely to distinguish one component from another that has the same name, without necessarily requiring or implying any such actual relationship or order between the components.

[0044] A method for producing a high-temperature resistant filter material, comprising a base fabric layer, characterized by comprising the following steps: S1, preparing mixed fibers: preparing polyester fibers or PTFE fibers or a mixture of both fibers; if mixing is required, the mixing ratio of the two fibers is 50:50; after loosening and mixing the above fibers, mixed fibers are obtained.

[0045] S2. Fiber felt preparation: The obtained mixed fibers are fed into a carding machine to obtain fiber felt for later use. Different numbers of fiber felts are selected according to the required thickness. After cleaning the burrs on both sides of the fiber felt, it is immersed in an impregnation tank filled with PTFE emulsion. After the impregnated fiber felt is taken out, it is double-layer needle punched and compounded. After repeating the compound needle punching multiple times, a fiber composite felt is formed. The fiber composite felt is then coarsely pressed to achieve a suitable thickness for later use.

[0046] S3. Base fabric layer reinforcement: A reinforcement layer is formed by inserting flexible inserts in both the transverse and longitudinal directions of the base fabric layer, and a coating is applied to both sides of the reinforcement layer with a coating thickness of 2mm.

[0047] S4. Laying fiber composite felt: Apply adhesive to the reinforcing layer formed in step S3, and bond the fiber composite felt and the reinforcing layer together under the action of traction rollers to form a semi-finished filter material.

[0048] S5. Cutting grooves: Cut grooves into the semi-finished filter material obtained in step S4. Cut several longitudinal grooves and several transverse grooves on the fiber composite felt using a grooved cutter. The width of the transverse groove is 1 / 2 of the width of the longitudinal groove.

[0049] S6. Preparation of longitudinal and transverse inlays: Prepare porous fibers and twist the porous fiber group into a braid shape to form longitudinal inlays. Place each longitudinal inlay in parallel and place each longitudinal inlay between the two fibers by using a cross-floating and sinking method, so that the two porous fibers form transverse inlays.

[0050] S7. Embedding and compaction: The longitudinal inlay body is embedded in the longitudinal groove to form a longitudinal inlay unit, and the transverse inlay body is embedded in the transverse groove to form a transverse inlay unit. The thickness of the longitudinal inlay body is higher than the groove depth, and the thickness exposed outside the longitudinal groove is between 1 / 3 and 1 / 2 of the groove depth.

[0051] S8. Molding and coating area: After the filter material is embedded, it is flattened with a pressure of 500N for 3-4 times. The longitudinal and transverse inserts form several square coating areas in the longitudinal and transverse grooves.

[0052] S9. Step-by-step adhesive application: First, apply preliminary adhesive to the longitudinal and transverse inserts, as well as the longitudinal and transverse grooves; then, apply adhesive to the square area formed in step S8; finally, apply PTFE surface adhesive to the surface of the filter material to complete the adhesive application.

[0053] S10. Winding and Storage: After the coating has cured and cooled, wind and store the finished filter material from step S9 to complete the processing.

[0054] The filter media made from polyester fiber, PTFE fiber, or a mixture of both is lightweight and has strong heat resistance. The filter media made from this material has good surface heat resistance and can be used in high-temperature environments. Furthermore, coating the base fabric surface with PTFE emulsion improves the overall corrosion resistance of the filter media and prevents corrosive particles from adhering to the filter media and affecting the overall filtration effect. The base fabric layer made according to the above process has good high-temperature resistance and corrosion resistance.

[0055] The specific reinforcement steps of the base fabric layer in step S3 are as follows: S30, longitudinal perforation of the base fabric layer: fold the longer side of the base fabric layer at equal intervals to form a thick block of the base fabric layer, open several through holes along its length on the thick block of the base fabric layer, and clean the burrs inside the through holes.

[0056] S31. Longitudinal insertion of flexible inserts: Insert flexible inserts into the through holes of the base fabric layer, unfold the base fabric layer, and drip thermoplastic resin into the openings of the base fabric layer to achieve a reinforcement effect.

[0057] S32. Transverse perforation of the base fabric layer: Fold the shorter side of the base fabric layer at equal intervals to form a thick block of the base fabric layer, and make several through holes along its length on the thick block of the base fabric layer, and clean the burrs inside the through holes.

[0058] S33. Lateral insertion of flexible inserts: Insert flexible inserts into the through holes of the base fabric layer, unfold the base fabric layer, and drip thermoplastic resin into the openings of the base fabric layer and the joints of the flexible inserts to form a reinforcing layer.

[0059] Furthermore, the specific adhesive application steps in step S9 are as follows: S90, Preliminary adhesive application: Apply PTFE adhesive locally to the periphery of the longitudinal and transverse inlays until the PTFE coating can penetrate into the holes and grooves of each inlay.

[0060] S91, Applying adhesive to the square area: Apply adhesive to the area formed in step S90 using an adhesive applicator until the PTFE coating in the area can be fused with the PTFE coating on each longitudinal and transverse inlay.

[0061] S92, PTFE surface coating: After the coating in step S91 is completed, the surface of the obtained semi-finished product is coated with adhesive again, covering each longitudinal and transverse inlay under the PTFE surface, and then a PTFE film is applied for coating.

[0062] The filter media is reinforced by adding flexible inserts crosswise within the base fabric layer. This is achieved by folding and perforating the base fabric layer, inserting the flexible inserts into the through-holes. These flexible inserts are positioned inside the base fabric layer, and thermoplastic resin is used between the flexible inserts and between the flexible inserts and the base fabric layer to connect them into a unified structure, ensuring the bonding strength of the base fabric layer. Furthermore, both the perforation of the base fabric layer and the insertion of the flexible inserts can be automatically completed on a machine tool, resulting in a high degree of automation. Additionally, a fiber composite felt is laid on the base fabric layer, containing longitudinal and transverse inserts. The longitudinal inserts are formed by porous fibers. The components are twisted into a spiral shape, resulting in high structural strength. The longitudinal inlays are located inside the transverse inlays, creating a strong overall connection structure. Furthermore, the longitudinal and transverse inlays are coated with adhesive in stages. First, a preliminary adhesive is applied to both the longitudinal and transverse inlays, as well as the longitudinal and transverse grooves, allowing the PTFE adhesive to penetrate deep into the gaps between the fibers, increasing the connection strength between the longitudinal and transverse inlays. Then, adhesive is applied to the area between the transverse and longitudinal inlays, fusing the first and second adhesive applications. Finally, a film is applied to the overall surface to maximize the overall structural strength and complete the adhesive coating process.

[0063] Meanwhile, in order to prevent the flexible insert from being damaged in high-temperature environments and to improve the structural strength and service life of the filter material, carbon fiber bundles are set in the flexible insert, and a synthetic mica tape layer and a glass fiber layer are wrapped around the outside of the carbon fiber bundles. Both the glass fiber and the synthetic mica tape have good high-temperature resistance, which allows the filter material with the flexible insert to be used in high-temperature environments. At the same time, the carbon fiber bundles inside the flexible insert have strong ductility and tensile strength, resulting in high overall strength.

[0064] The present invention is further configured such that the mixed fibers in step S1 include glass fibers and carbon fibers.

[0065] The present invention is further configured such that: the flexible insert in step S3 includes a carbon fiber bundle disposed in the middle of the flexible insert, and the outer periphery of the carbon fiber bundle is wrapped with a synthetic mica tape layer and a glass fiber layer.

[0066] The present invention is further configured such that the thermoplastic resin in steps S31 and S33 is a polyolefin resin, and the resin is further provided with glass fibers for reinforcement.

[0067] The present invention is further configured such that the coating in step S9 comprises PTFE emulsion, thermoplastic resin, PTFE fiber and glass fiber.

[0068] The present invention is further configured such that the adhesive in step S4 is one or more of silicate adhesives, phosphate adhesives, metal alkoxide adhesives, and inorganic copper oxide material adhesives.

[0069] And refer to Figure 6 To achieve continuous production of filter media, the filter media production line is driven by traction rollers. The preparation of fiber composite felt, reinforcement of the base fabric layer, bonding of fiber composite felt and base fabric layer, fabrication and compaction of inserts, and coating of filter media are all completed in one go on the production line. The traction rollers drive the overall movement of the filter media. In the front part of the production line, the production of filter cloth is set up in a double layer. The preparation of fiber composite felt and reinforcement of base fabric layer are carried out simultaneously. After the fiber composite felt is produced, the adhesive is applied simultaneously. Then it is bonded to the reinforced base fabric layer to form a semi-finished filter media. The semi-finished filter media is then transported to the coating area for coating. The production is continuous and efficient.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for producing a high-temperature-resistant filter material comprising a base cloth layer, characterized by, Comprise the following steps: S1, preparation of mixed fiber: preparation of polyester fiber or PTFE fiber or mixed fiber of both fibers, if necessary, the mixing ratio of the two fibers is 50:50, the mixed fibers are opened and mixed, then the mixed fibers are obtained; S2, fiber felt preparation: the obtained mixed fiber is fed into the carding machine to obtain the fiber felt for use, and different number of fiber felts are selected according to the required thickness size, the surface burrs of the fiber felt are cleaned, then the fiber felt is immersed in the impregnation tank filled with PTFE emulsion, the impregnated fiber felt is taken out, then double needle punching is carried out, the fiber combination felt is formed after repeated composite needle punching, and the fiber combination felt is coarsely pressed to achieve the appropriate thickness for standby; S3, reinforcement of base cloth layer: flexible insertion body is inserted into the base cloth layer in transverse and longitudinal directions to form a reinforced layer, and coating is applied to the surface of the reinforced layer, the coating thickness is 2mm; S4, laying fiber combination felt: adhesive is applied on the reinforced layer formed in step S3, and the fiber combination felt and the reinforced layer are bonded under the action of the traction roller to form a semi-finished filter material; S5, groove embedding: the semi-finished filter material obtained in step S4 is opened and embedded, a plurality of longitudinal grooves and a plurality of transverse grooves are cut on the fiber combination felt by groove-shaped cutter, the groove width of the transverse groove is 1 / 2 of the groove width of the longitudinal groove; S6, preparation of longitudinal and transverse inlay: prepare porous fiber, and twist the porous fiber into a spiral shape to form a longitudinal inlay, place the longitudinal inlays in parallel, and place the longitudinal inlays between the two fibers by using the cross floating method of the two porous fibers to form a transverse inlay; S7, wire embedding and compaction: the longitudinal inlay is embedded into the longitudinal groove to form a longitudinal inlay unit, and the transverse inlay is embedded into the transverse groove to form a transverse inlay unit, the thickness of the longitudinal inlay is higher than the groove depth, and the exposed thickness outside the longitudinal groove is between 1 / 3 and 1 / 2 of the groove depth; S8, forming and gluing area: the filter material after embedding the wire is flat pressed with a pressure of 500N for 3-4 times, the longitudinal inlay and the transverse inlay form a plurality of square gluing areas in the longitudinal groove and the transverse groove; S9, step gluing: the longitudinal inlay and the transverse inlay and the longitudinal groove and the transverse groove are preliminarily glued respectively, then the square area gluing of the gluing area formed in step S8 is carried out, and finally the PTFE surface gluing of the surface layer of the filter material is carried out to complete the gluing; S10, winding and storage: after the coating is solidified and cooled, the filter product in step S9 is wound and stored, and the processing is completed; The specific reinforcement steps of the base cloth layer in step S3 are as follows, S30, longitudinal punching of base cloth layer: the longer side of the base cloth layer is folded equidistantly to form a base cloth layer thick block, a plurality of through holes are formed on the base cloth layer thick block along the length direction, and the burrs inside the through holes are cleaned; S31, longitudinal insertion of flexible insertion body: the flexible insertion body is inserted into the through hole of the base cloth layer thick block, the base cloth layer thick block is unfolded, and the hot plastic resin is dropped at the opening of the base cloth layer to achieve the reinforcement effect; S32, transverse punching of the base cloth layer: the shorter side of the base cloth layer is folded equidistantly to form a base cloth layer thick block, a plurality of through holes are formed on the base cloth layer thick block along the length direction of the base cloth layer thick block, and burrs inside the through holes are cleaned; S33, transverse insertion of the flexible insertion body: the flexible insertion body is inserted into the through hole of the base cloth layer thick block, the base cloth layer thick block is unfolded, and the hot plastic resin is dropped at the opening of the base cloth layer and the connection of the flexible insertion body to form a reinforcing layer.

2. The method of claim 1, wherein the high-temperature resistant filter material is produced by the steps of: mixing the inorganic fiber and the binder to form a mixture; and extruding the mixture to form a filter material. The specific gluing step in step S9 is as follows, S90, preliminary gluing: the PTFE gluing is locally applied to the circumferential side of the longitudinal and transverse insertion bodies until the PTFE gluing can penetrate into the holes and grooves of the insertion bodies; S91, gluing of the square area: the gluing area formed in step S90 is range-glued by a gluing machine until the PTFE gluing in the gluing area can be fused with the PTFE gluing on the longitudinal and transverse insertion bodies; S92, PTFE surface layer gluing: after the gluing in step S91 is completed, the surface layer of the obtained semi-finished product is glued again, the longitudinal and transverse insertion bodies are covered under the PTFE surface layer, and the PTFE film is coated.

3. The method of claim 1, wherein the high-temperature resistant filter material is produced by the steps of: mixing the inorganic fiber and the binder to form a mixture; and extruding the mixture to form a filter material. The mixed fibers in step S1 include glass fibers and carbon fibers.

4. The method of claim 1, wherein the high-temperature resistant filter material is produced by the steps of: mixing the inorganic fiber and the binder to form a mixture; and extruding the mixture to form a filter material. The flexible insertion body in step S3 includes a carbon fiber wire bundle arranged in the middle of the flexible insertion body, and the carbon fiber wire bundle is wrapped with a synthetic mica tape layer and a glass fiber layer.

5. The method of claim 1, wherein the high-temperature resistant filter material is produced by the steps of: mixing the inorganic fiber and the binder to form a mixture; and extruding the mixture to form a filter material. The thermoplastic resin in steps S31 and S33 is a polyolefin resin, and the resin further includes glass fibers for reinforcement.

6. The method of claim 1, wherein the high-temperature resistant filter material is produced by the steps of: mixing the inorganic fiber and the binder to form a mixture; and extruding the mixture to form a filter material. The gluing agent in step S9 includes PTFE emulsion, thermoplastic resin, PTFE fiber and glass fiber.

7. The method of claim 1, wherein the high-temperature resistant filter material is produced by the steps of: mixing the inorganic fiber and the binder to form a mixture; and extruding the mixture to form a filter material. The adhesive in step S4 is one or more of silicate adhesive, phosphate adhesive, metal alkoxide adhesive and inorganic copper oxide material adhesive.

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