Production method of fiberglass PTFE base cloth reinforced high-temperature resistant filter material

Abstract

The present invention discloses a production method of a fiberglass PTFE base cloth reinforced high-temperature resistant filter material, aiming to provide a fiberglass PTFE base cloth reinforced high-temperature resistant filter material that undergoes triple impregnation of fiberglass impregnation, base cloth layer impregnation, and composite fiber surface layer impregnation, has strong integrity, and good high-temperature resistance effect. The key points of its technical solution are that by using fiberglass as the base cloth layer and also impregnating the fiberglass with resin, the overall strength of the fiberglass is enhanced again. Therefore, the base cloth layer woven from the impregnated fiberglass has greatly improved structural strength. Using it as the base cloth layer increases the overall strength of the filter material. Moreover, by impregnating the woven base cloth layer with PTFE to make a fiberglass base cloth and cooperating with a double-layer composite fiber cloth layer for needling, the overall composite property is achieved. By performing PTFE impregnation treatment again, the overall multi-layer high-temperature resistance and strengthening effect are achieved. The present invention is applicable to the technical field of filter material processing.

Description

Technical Field

[0001] The present invention relates to the technical field of filter material processing, and more specifically, it relates to a production method of a fiberglass PTFE base cloth reinforced high-temperature resistant filter material. Background Art

[0002] The flue gas generated in industries such as waste incineration, other biomass power generation, coal-fired boilers, and chemical engineering has a high temperature and complex components, containing corrosive and harmful substances such as acids, alkalis, and heavy metals, and has very high comprehensive index requirements for high-temperature filter materials.

[0003] It is required that the filter material has good heat resistance and will not cause the strength to decline and lead to the damage of the filter bag when enduring high temperature for a long time. It is required that the filter material has good corrosion resistance, oxidation resistance, acid resistance, hydrolysis resistance, does not absorb moisture at high temperature, and has good chemical stability. It is required that the filter material has high strength and can withstand the long-term expansion and contraction movement to ensure that the filter bag remains unchanged in shape during long-term use.

[0004] In summary, in order to improve the filtration operation of the filter material in a high-temperature environment, a filter material with good high-temperature resistance and high overall strength is needed. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a fiberglass PTFE base cloth reinforced high-temperature resistant filter material that undergoes triple impregnation of fiberglass impregnation, base cloth layer impregnation, and composite fiber surface layer impregnation, has strong integrity, and good high-temperature resistance.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A production method of a fiberglass PTFE base cloth reinforced high-temperature resistant filter material, including the following steps. S1. Prepare ultra-fine glass fibers, and perform melt impregnation on the glass fibers by impregnation. The impregnating material is octene and polyolefin resin. Use the ultra-fine fiberglass yarns impregnated with resin as warp and weft yarns respectively to weave a fiberglass woven fabric on a high-speed loom as the base cloth layer;

[0007] S2. Treat the entire fiberglass woven fabric through PTFE impregnation to make a fiberglass base cloth, and form upper and lower impregnation treatment layers on both sides of the fiberglass base cloth through impregnation;

[0008] S3. Lay composite fiber cloth layers on both sides of the fiberglass base cloth and make a fiberglass composite fiber filter material layer through needle punching processing, that is, form upper and lower composite fiber cloth layers on both sides of the high-performance fiberglass base cloth;

[0009] S4. Then lay the fiberglass woven fabric separately on both sides of the fiberglass composite fiber filter material and make a composite fiber filter material surface layer through needle punching processing;

[0010] S5. Then impregnate the composite fiber filter material surface layer again with PTFE emulsion to form a reinforced fiberglass PTFE base cloth filter material;

[0011] After drying the filter material obtained in step S5, it is wound up to complete the processing.

[0012] The present invention is further configured as follows: in step S2, an internal turbulent flow impregnation method is used for impregnation treatment. The internal turbulent flow impregnation method includes an impregnation tank, an internal turbulent flow mechanism connected to the impregnation tank, and a tractor for pulling the fabric. The internal turbulent flow mechanism includes a turbulent flow power chamber connected to the impregnation tank through a set flow channel, and a pressure charging device for performing pressure charging, releasing, and circulating operations on the turbulent flow power chamber.

[0013] The present invention is further configured as follows: a lifting device for adjusting the height of the flow channel is provided between the impregnation tank and the turbulent flow power chamber. The lifting device includes an adjustment chamber provided between the impregnation tank and the turbulent flow power chamber, elongated adjustment channels provided on two corresponding inner walls of the adjustment chamber, movable flanges provided at both axial ends of the flow channel and movably and sealingly connected to the inner wall of the adjustment chamber, and a lifting oil cylinder for driving the flow channel to lift. The movable flange covers the elongated adjustment channel and communicates with the impregnation tank and the turbulent flow power chamber through the flow channel.

[0014] The present invention is further configured as follows: the specific impregnation method in step S2 is as follows. S20: Add full PTFE emulsion into the impregnation tank, and then place the fabric to be impregnated in the impregnation tank.

[0015] S21: By driving the pressure charging device, perform pressure charging, releasing, and circulating and alternating driving on the turbulent flow power chamber to form disturbance in the impregnation tank.

[0016] S22: Drive the tractor to pull the fabric and complete the impregnation of one side of the fabric. The pulling speed of the tractor is 3 m / min - 5 m / min.

[0017] S23: Under the drive of the tractor, and through the lifting oil cylinder, drive the flow channel up and down. The lifting speed of the lifting oil cylinder is 3 - 5 reciprocating up and down drives of the flow channel per minute.

[0018] S24: After impregnating one side of the fabric, turn the fabric over and impregnate it in the same way, and then proceed to the next process.

[0019] The present invention is further configured as follows: a flow control component is provided in the flow channel. The flow control component includes a fixed gas chamber coated outside the flow channel, a deformable side wall provided on the flow channel and being the inner wall of one side of the fixed gas chamber, a middle blocking body provided in the flow channel and at the middle of the flow channel, and a support body provided in the flow channel and for supporting the middle blocking body.

[0020] The present invention is further configured such that: when the pressure in the flow channel decreases and the air pressure in the fixed air chamber is greater than the water pressure in the flow channel, the deformable side wall is configured to form a convex state; when the pressure in the flow channel is constant and is balanced with or greater than the air pressure in the fixed air chamber, it forms a balanced state or a concave state.

[0021] The present invention is further configured such that: the deformable side wall is made of a flexible material.

[0022] A filter material produced by a production method applicable to the above-mentioned fiberglass PTFE-based fabric-reinforced high-temperature resistant filter material. The filter material has a 5-layer structure, with a fiberglass base fabric after PTFE impregnation treatment in the middle layer; composite fiber fabric layers provided on both sides of the middle layer; fiberglass woven fabrics provided on both sides of the composite fiber fabric layers, and an impregnation layer obtained by impregnating the formed composite fiber filter material surface layer with a PTFE emulsion.

[0023] By adopting the above technical solution, the beneficial effects are as follows: 1. By using fiberglass as the base fabric layer and impregnating the fiberglass with resin, the overall strength of the fiberglass is enhanced again. Therefore, the base fabric layer woven from the impregnated fiberglass has greatly improved structural strength. Using it as the base fabric layer increases the overall strength of the filter material. Moreover, by impregnating the woven base fabric layer with PTFE to make a fiberglass base fabric and cooperating with double-layer composite fiber fabric layers for needling, the overall composite property is achieved. By impregnating with PTFE again, the overall multi-layer high-temperature resistance and enhancement effects are achieved, with strong practicability and high structural strength;

[0024] 2. Further, in step S2, an internal turbulent flow impregnation method is adopted for impregnation treatment. The internal turbulent flow impregnation method includes an impregnation tank, an internal turbulent flow mechanism connected to the impregnation tank, and a tractor for pulling the fabric. The internal turbulent flow mechanism includes a turbulent flow power chamber connected to the impregnation tank through a flow channel, and a pressure charging device for performing pressure charging, releasing, and circulating operations on the turbulent flow power chamber. By adopting the internal turbulent flow method for unilateral impregnation, the impregnation coverage area of the filter material can be increased, and a continuous internal turbulent flow effect is formed in the impregnation tank, preventing the precipitation of the impregnation liquid and greatly improving the impregnation effect of the filter material;

[0025] 3. Further, a lifting device for adjusting the height of the flow channel is provided between the impregnation tank and the turbulent flow power chamber. The lifting device includes an adjustment chamber arranged between the impregnation tank and the turbulent flow power chamber, elongated adjustment channels arranged on two corresponding inner walls of the adjustment chamber, movable flanges arranged at both axial ends of the flow channel and movably and sealingly connected to the inner wall of the adjustment chamber, and a lifting oil cylinder for driving the flow channel to lift. The movable flanges cover the elongated adjustment channels and are connected to the impregnation tank and the turbulent flow power chamber through the flow channel. With the above structure, the height of the flow channel is adjusted through the provided lifting device, thereby realizing the all-round disturbance of the impregnation liquid in the impregnation tank, thus realizing the impregnation effect on the filter material. It has strong practicability, a simple structure, and the disturbed impregnation liquid is more evenly distributed, greatly increasing the coverage area;

[0026] 4. Moreover, a flow control component is provided in the flow channel. The flow control component includes a fixed air chamber covering the outside of the flow channel, a deformable side wall arranged on the flow channel and being the inner wall on one side of the fixed air chamber, a middle blocking body arranged in the middle of the flow channel in the flow channel, and a support body arranged in the flow channel and used for supporting the middle blocking body. Because the fixed air chamber will change with the pressure in the flow channel, and in the flow channel, a deformation towards one side of the flow channel is formed, forming a reduction in the inner diameter of the flow channel, thereby forming a resistance effect on the flow-through, and at the same time forming a slow-flow effect when the flow rate is too large. It has strong practicability and a simple structure. Description of the Drawings

[0027] Figure 1 It is a processing flow chart of an embodiment of the production method of a glass fiber PTFE base cloth reinforced high-temperature resistant filter material of the present invention.

[0028] Figure 2 It is a schematic diagram of an internal turbulent flow type impregnation structure of an embodiment of the production method of a glass fiber PTFE base cloth reinforced high-temperature resistant filter material of the present invention.

[0029] In the figure, reference numerals: 1, impregnation tank; 2, tractor; 30, turbulent flow power chamber; 31, pressure application device; 32, flow channel; 33, adjustment chamber; 330, elongated adjustment channel; 331, movable flange; 332, lifting oil cylinder; 34, fixed air chamber; 340, deformable side wall; 341, middle blocking body; 342, support body. Detailed Embodiments

[0030] Refer to Figures 1 to 2 To further describe an embodiment of the production method of a glass fiber PTFE base cloth reinforced high-temperature resistant filter material of the present invention.

[0031] For ease of explanation, in the embodiments, spatial relative terms such as "upper", "lower", "left", "right", etc. are used to describe the relationship of one element or feature shown in the figure with respect to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations during the use or operation of the device. For example, if the device in the figure is inverted, the element described as being "below" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "lower" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein can be interpreted accordingly.

[0032] Moreover, relational terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components.

[0033] A production method of a glass fiber PTFE base cloth reinforced high-temperature resistant filter material includes the following steps. S1: Prepare ultra-fine glass fibers, and perform melt impregnation on the glass fibers by impregnation. The impregnation material is octene and polyolefin resin. Use the ultra-fine glass fiber yarns impregnated with resin as warp and weft yarns respectively to weave a glass fiber woven fabric on a high-speed loom as the base cloth layer.

[0034] S2: Treat the whole glass fiber woven fabric through PTFE impregnation to make a glass fiber base cloth. Both sides of the glass fiber base cloth are impregnated to form upper and lower impregnation treatment layers.

[0035] S3: Lay composite fiber cloth layers on both sides of the glass fiber base cloth, and make a glass fiber composite fiber filter material layer through needling processing, that is, form upper and lower composite fiber cloth layers on both sides of the high-performance glass fiber base cloth.

[0036] S4: Then lay the glass fiber woven fabric on both sides of the glass fiber composite fiber filter material and make a composite fiber filter material surface layer through needling processing.

[0037] S5: Then re-impregnate the composite fiber filter material surface layer with PTFE emulsion to form a reinforced glass fiber PTFE base cloth filter material.

[0038] S6: After drying the filter material obtained in step S5, wind it up to complete the processing.

[0039] By using glass fiber as the base cloth layer and impregnating the glass fiber with resin, the overall strength of the glass fiber is enhanced again. Therefore, the structural strength of the base cloth layer woven from the impregnated glass fiber is greatly improved. Using it as the base cloth layer realizes an increase in the overall strength of the filter material. Moreover, by impregnating the woven base cloth layer with PTFE to make a glass fiber base cloth and performing needling in combination with a double-layer composite fiber cloth layer, the overall composite property is achieved. By performing PTFE impregnation treatment again, the overall multi-layer high-temperature resistance and strengthening effect are realized, with strong practicability and high structural strength.

[0040] The present invention is further configured such that in step S2, an internal turbulent flow impregnation method is used for impregnation treatment. The internal turbulent flow impregnation method includes an impregnation tank 1, an internal turbulent flow mechanism connected to the impregnation tank 1, and a tractor 2 for pulling the fabric. The internal turbulent flow mechanism includes a turbulent flow power chamber 30 connected to the impregnation tank 1 through a flow channel 32, and a pressure application device 31 for performing pressure application, release, and circulation operations on the turbulent flow power chamber 30. Further, in step S2, an internal turbulent flow impregnation method is used for impregnation treatment. The internal turbulent flow impregnation method includes an impregnation tank 1, an internal turbulent flow mechanism connected to the impregnation tank 1, and a tractor 2 for pulling the fabric. The internal turbulent flow mechanism includes a turbulent flow power chamber 30 connected to the impregnation tank 1 through a flow channel 32, and a pressure application device 31 for performing pressure application, release, and circulation operations on the turbulent flow power chamber 30. By using the internal turbulent flow method for unilateral impregnation, the impregnation coverage area of the filter material can be increased, and an internal turbulent flow effect is continuously formed in the impregnation tank 1, preventing the precipitation of the impregnation liquid and greatly improving the impregnation effect of the filter material.

[0041] The present invention is further configured such that a lifting device for adjusting the height of the flow channel 32 is provided between the impregnation tank 1 and the turbulence power chamber 30. The lifting device includes an adjustment chamber 33 provided between the impregnation tank 1 and the turbulence power chamber 30, elongated adjustment channels 330 provided on two corresponding inner walls of the adjustment chamber 33, movable flanges 331 provided at both axial ends of the flow channel 32 and movably and sealingly connected to the inner walls of the adjustment chamber 33, and a lifting oil cylinder 332 for driving the flow channel 32 to lift. The movable flanges 331 cover the elongated adjustment channels 330 and communicate the impregnation tank 1 and the turbulence power chamber 30 through the flow channel 32. Further, a lifting device for adjusting the height of the flow channel 32 is provided between the impregnation tank 1 and the turbulence power chamber 30. The lifting device includes an adjustment chamber 33 provided between the impregnation tank 1 and the turbulence power chamber 30, elongated adjustment channels 330 provided on two corresponding inner walls of the adjustment chamber 33, movable flanges 331 provided at both axial ends of the flow channel 32 and movably and sealingly connected to the inner walls of the adjustment chamber 33, and a lifting oil cylinder 332 for driving the flow channel 32 to lift. The movable flanges 331 cover the elongated adjustment channels 330 and communicate the impregnation tank 1 and the turbulence power chamber 30 through the flow channel 32. With the above structural arrangement, the height of the flow channel 32 is adjusted through the provided lifting device, thereby realizing the all-round disturbance of the impregnation liquid in the impregnation tank 1, achieving the impregnation effect on the filter material, having strong practicability, a simple structure, and the disturbed impregnation liquid is more evenly distributed, greatly increasing the coverage area.

[0042] The present invention is further configured such that the specific impregnation method in step S2 is as follows: S20, add full PTFE emulsion into the impregnation tank 1, and then place the fabric to be impregnated in the impregnation tank 1;

[0043] S21, drive the pressure applying device 31 to apply pressure to, release, and cycle and alternately drive the turbulence power chamber 30 to form a disturbance in the impregnation tank 1;

[0044] S22, drive the tractor 2 to traction the fabric and complete the impregnation on one side of the fabric. The traction speed of the tractor 2 is 3 m / min - 5 m / min;

[0045] S23, under the drive of the tractor 2, and drive and adjust the flow channel 32 up and down through the lifting oil cylinder 332. The lifting speed of the lifting oil cylinder 332 is 3 - 5 reciprocating up and down drives of the flow channel 32 per minute;

[0046] After one-sided impregnation of the fabric, the fabric is then turned over and impregnated in the same manner, and then the next process is carried out. With the above settings, through the pressurization, release and cyclic alternating drive of the pressurizing device 31, and in cooperation with the lifting of the flow channel 32, the overall turbulent flow effect is greatly improved, and the impregnation uniformity of the fabric in the impregnation tank 1 is increased. It has strong practicability and a simple structure.

[0047] The present invention is further configured such that a flow control component is provided in the flow channel 32. The flow control component includes a fixed air chamber 34 covering the outside of the flow channel 32, a deformable side wall 340 provided on the flow channel 32 and being the inner wall on one side of the fixed air chamber 34, a middle flow blocker 341 provided in the flow channel 32 and located in the middle of the flow channel 32, and a support 342 provided in the flow channel 32 and used to support the middle flow blocker 341. By providing a flow control component in the flow channel 32, the flow control component includes a fixed air chamber 34 covering the outside of the flow channel 32, a deformable side wall 340 provided on the flow channel 32 and being the inner wall on one side of the fixed air chamber 34, a middle flow blocker 341 provided in the flow channel 32 and located in the middle of the flow channel 32, and a support 342 provided in the flow channel 32 and used to support the middle flow blocker 341. Since the fixed air chamber 34 will change with the pressure in the flow channel 32, in the flow channel 32, a deformation towards one side of the flow channel 32 will be formed, resulting in a reduction in the inner diameter of the flow channel 32, thereby forming a resistance effect on the flow-through, and at the same time forming a slow-flow effect when the flow rate is too large. It has strong practicability and a simple structure.

[0048] The present invention is further configured such that the deformable side wall 340 is configured to form a convex state when the pressure in the flow channel 32 decreases and the air pressure in the fixed air chamber 34 is greater than the water pressure in the flow channel 32; when the pressure in the flow channel 32 is constant and is balanced with or greater than the air pressure in the fixed air chamber 34, a balanced state or a concave state is formed. Taking the flow velocity in the flow channel 32 as the adjustment standard, because the greater the flow velocity, the smaller the pressure. When the flow velocity changes, the deformable side wall 340 will also deform due to the change in pressure, thereby blocking the water flow in the flow channel 32, and further adjusting the pressure. It has strong practicability and a simple structure.

[0049] The present invention is further configured such that the deformable side wall 340 is made of a flexible material. The deformable side wall 340 made of a flexible material can form a convex structure with the change of the water pressure in the flow channel 32, thereby realizing the adjustment of the water pressure. It has strong practicability and strong stability.

[0050] A filter material produced by a production method applicable to the above-mentioned fiberglass PTFE-based fabric reinforced high-temperature resistant filter material. The filter material has a 5-layer structure. The middle layer is a fiberglass fabric after PTFE impregnation treatment; composite fiber fabric layers are arranged on both sides of the middle layer; fiberglass woven fabrics are arranged on both sides of the composite fiber fabric layers, and an impregnation layer for PTFE emulsion impregnation after forming the composite fiber filter material surface layer. For the filter material prepared by the above method, through the formed 5-layer structure, and impregnating the base fabric layer with PTFE and impregnating the composite fiber filter material surface layer again after compounding, the overall strength and high-temperature resistance effect are greatly improved, with strong practicability and simple structure.

[0051] The above are only the preferred embodiments of the present invention and are 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 in the protection scope of the present invention.

Claims

1. A production method of a glass fiber PTFE base cloth reinforced high-temperature resistant filter material, characterized in that, It includes the following steps: S1. Forming a fiberglass base fabric layer: Prepare ultra-fine glass fibers, and conduct melt impregnation on the glass fibers by means of impregnation. The impregnating material is octene and polyolefin resin. Use the ultra-fine fiberglass yarns after resin impregnation as warp and weft yarns respectively to weave a fiberglass woven fabric on a high-speed loom as the base fabric layer; S2. Impregnating the fiberglass base fabric layer: Treat the entire fiberglass woven fabric through PTFE impregnation to make a fiberglass base fabric. Both sides of the fiberglass base fabric are impregnated to form upper and lower impregnation treatment layers; S3. Needle-punching and forming a composite fiber fabric layer: Lay composite fiber fabric layers on both sides of the fiberglass base fabric, and process them through needle punching to make a fiberglass composite fiber filter layer, that is, upper and lower composite fiber fabric layers are formed on both sides of the high-performance fiberglass base fabric; S4. Composite re-needle punching: Then lay the fiberglass woven fabric separately on both sides of the fiberglass composite fiber filter, and process it through needle punching to make a composite fiber filter surface layer; S5. Re-impregnating the composite fiber filter surface layer: Then impregnate the composite fiber filter surface layer again with PTFE emulsion to form a reinforced fiberglass PTFE base fabric filter; S6. Drying and winding: After drying the filter obtained in step S5, wind it up to complete the processing. In step S2, an internal turbulent flow impregnation method is used for impregnation treatment. This internal turbulent flow impregnation method includes an impregnation tank (1), an internal turbulent flow mechanism connected to the impregnation tank (1), and a tractor (2) for pulling the fabric. The internal turbulent flow mechanism includes a turbulent flow power chamber (30) connected to the impregnation tank (1) through a flow channel (32), and a pressure charging device (31) for pressurizing, releasing, and circulating operations on the turbulent flow power chamber (30). A lifting device for adjusting the height of the flow channel (32) is provided between the impregnation tank (1) and the turbulent flow power chamber (30). This lifting device includes an adjustment chamber (33) provided between the impregnation tank (1) and the turbulent flow power chamber (30), elongated adjustment channels (330) provided on two corresponding inner walls of the adjustment chamber (33), movable flanges (331) provided at both axial ends of the flow channel (32) and movably and sealingly connected to the inner wall of the adjustment chamber (33), and a lifting oil cylinder (332) for driving the flow channel (32) to lift. The movable flange (331) covers the elongated adjustment channel (330) and communicates with the impregnation tank (1) and the turbulent flow power chamber (30) through the flow channel (32).

2. The production method of a fiberglass PTFE base fabric reinforced high-temperature resistant filter material according to claim 1, characterized in that, The specific impregnation method in step S2 is as follows: S20. Add full PTFE emulsion to the impregnation tank (1), and then place the fabric to be impregnated in the impregnation tank (1); S21. Drive the pressure charging device (31) to pressurize, release, and alternately drive the turbulent flow power chamber (30) in a cyclic manner to form a disturbance in the impregnation tank (1); S22. Drive the tractor (2) to pull the fabric and complete the impregnation of one side of the fabric. The pulling speed of the tractor (2) is 3 m / min - 5 m / min; S23. Driven by the tractor (2), the flow channel (32) is driven to be adjusted up and down through the lifting oil cylinder (332). The lifting speed of the lifting oil cylinder (332) is 3 - 5 reciprocating up and down drives of the flow channel (32) per minute. S24. After one - side impregnation of the fabric, the fabric is turned over and impregnated in the same way, and then the next process is carried out.

3. The production method of a fiberglass PTFE base cloth reinforced high-temperature resistant filter material according to claim 1, characterized in that, A flow - control component is arranged in the flow channel (32). The flow - control component includes a fixed air chamber (34) covering the outside of the flow channel (32), a deformable side wall (340) arranged on the flow channel (32) and being the inner wall of one side of the fixed air chamber (34), a middle flow - blocking body (341) arranged in the flow channel (32) and at the middle of the flow channel (32), and a support body (342) arranged in the flow channel (32) and used for supporting the middle flow - blocking body (341).

4. The production method of a fiberglass PTFE base cloth reinforced high-temperature resistant filter material according to claim 3, characterized in that, The deformable side wall (340) is configured to form a convex state when the pressure in the flow channel (32) decreases and the air pressure in the fixed air chamber (34) is greater than the water pressure in the flow channel (32); when the pressure in the flow channel (32) is constant and is balanced with or greater than the air pressure in the fixed air chamber (34), it forms a balanced state or a concave state.

5. The production method of a fiberglass PTFE base cloth reinforced high-temperature resistant filter material according to claim 4, characterized in that, The deformable side wall (340) is made of a flexible material.

6. A filter material produced by a production method applicable to the glass fiber PTFE base cloth reinforced high-temperature resistant filter material described in any one of the above claims 1-5, characterized in that, The filter material has a 5 - layer structure. The middle layer is a glass fiber base cloth after PTFE impregnation treatment; composite fiber cloth layers are arranged on both sides of the middle layer; glass fiber woven cloths are arranged on both sides of the composite fiber cloth layers, and an impregnation layer for PTFE emulsion impregnation after forming the surface layer of the composite fiber filter material.

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