Preparation method and production line of film-coated filter material

Abstract

The application discloses a preparation method and a production line of a film-coated filter material, and belongs to the technical field of film-coated filter material preparation. The film-coated filter material production line comprises, which are arranged in sequence, a unwinding device, a production device and a winding device. The unwinding device comprises a filter material unwinding mechanism and a microporous membrane unwinding mechanism, the production device comprises a coating mechanism and a film-coating mechanism arranged at the rear end of the coating mechanism. The microporous membrane unwinding mechanism is used for conveying the microporous membrane to the film-coating mechanism, and the filter material unwinding mechanism can selectively convey the filter material to the coating mechanism or the film-coating mechanism. The coating mechanism is used for coating the filter material with slurry, and can selectively convey the coated material to the film-coating mechanism or the winding device; the film-coating mechanism is used for hot-pressing the microporous membrane and the filter material or the coated material, and conveying the hot-pressed material to the winding device. The film-coated filter material production line provided by the example of the application can meet the preparation requirements of various processes, can prepare various film-coated filter materials, and can improve the preparation efficiency and quality.

Description

Technical Field

[0001] This application relates to the field of membrane filter material preparation technology, and more specifically, to a method and production line for preparing membrane filter material. Background Technology

[0002] Membrane filter media are widely used due to their high filtration efficiency, low operating resistance, easy and frequent dust removal, large air volume handling capacity, and long service life.

[0003] Existing membrane filter media are mainly formed by laminating polytetrafluoroethylene (PTFE) microporous membranes with filter media. There are generally two lamination processes for PTFE microporous membranes with filter media: one is to hot-press expanded PTFE microporous membranes with micropore size and porous structure made of PTFE resin with filter media to form a hot-pressed membrane; the other is to coat the filter media with a PTFE mixed emulsion through a coating process to form a coated membrane.

[0004] However, the existing production equipment for membrane filter media has relatively simple functions. It requires frequent transfer of products from one process to another, which is labor-intensive, requires a large workforce, has a low degree of automation, and is prone to contamination and damage to the products, thus affecting product quality. Summary of the Invention

[0005] In view of the above-mentioned shortcomings, this application provides a method and production line for preparing membrane filter media, so as to partially or completely improve the preparation problems of membrane filter media in related technologies.

[0006] This application is implemented as follows:

[0007] In a first aspect, an example of this application provides a membrane filter media production line, which, in the direction of process travel, includes an unwinding device, a production device, and a winding device arranged in sequence.

[0008] The unwinding device includes a filter media unwinding mechanism and a microporous membrane unwinding mechanism, while the production device includes a coating mechanism and a laminating mechanism located at the rear end of the coating mechanism. The microporous membrane unwinding mechanism is used to transport the microporous membrane to the laminating mechanism, and the filter media unwinding mechanism can selectively transport the filter media to either the coating mechanism or the laminating mechanism. The coating mechanism is used to apply a slurry coating to the filter media and can selectively transport the coated material to either the laminating mechanism or the winding device; the laminating mechanism is used to hot-press the microporous membrane with the filter media or the coated material and transport the hot-pressed material to the winding device.

[0009] In the above implementation process, the membrane filter material production line provided in this application example can be used to prepare hot-pressed membrane filter material. During the preparation process, the filter material unwinding mechanism transports the unwound filter material to the membrane coating mechanism, and at the same time, the microporous membrane unwinding mechanism transports the unwound microporous membrane to the membrane coating mechanism. The membrane coating mechanism hot-presses the microporous membrane and the filter material to obtain hot-pressed membrane filter material. Then, the membrane coating mechanism transports the hot-pressed membrane filter material to the winding mechanism for winding.

[0010] Furthermore, the membrane filter material production line provided in this application example can be used to prepare coated membrane filter material. During the preparation process, the filter material unwinding mechanism transports the unwound filter material to the coating mechanism, and then the coating mechanism applies slurry to the filter material to obtain coated membrane filter material; then, the coated membrane filter material is transported to the winding device for winding.

[0011] In addition, the membrane filter production line provided in this application can also be used to prepare coated hot-pressed membrane filter media. During the preparation process, the coating mechanism transports the coated membrane filter media to the membrane coating mechanism, and at the same time, the microporous membrane unwinding mechanism transports the unwound microporous membrane to the membrane coating mechanism. The membrane coating mechanism hot-presses the coated membrane filter media and the microporous membrane to obtain the coated hot-pressed membrane filter media. Then, the coated hot-pressed membrane filter media is transported to the winding device for winding by the membrane coating mechanism.

[0012] The membrane filter media production line provided in this application can produce three types of membrane filter media through three different processes, which are highly functional, can improve production efficiency, reduce cross-contamination, and improve product quality.

[0013] In conjunction with the first aspect, in an optional embodiment of this application, the coating mechanism includes an operating table, a coating roller, and a pressing roller, with the coating roller and pressing roller positioned above the operating table; the filter material unwinding mechanism can optionally convey the filter material to the operating table, and the coating roller and pressing roller sequentially coat and press the filter material with slurry.

[0014] Optionally, the coating mechanism may also include a grouting machine for injecting grout into the filter media on the worktable.

[0015] In the above implementation process, when preparing coated filter media using the membrane filter media production line provided in this application example, the unwound filter media can be transported to the operating table of the coating mechanism using the filter media unwinding mechanism. Then, the slurry is coated onto the filter media using the coating roller above the operating table. Then, the coated filter media is pressed using the pressing roller to squeeze out the excess slurry and improve the uniformity of the coating.

[0016] A grouting machine is installed in the coating mechanism to inject grout onto the filter material located on the operating table, so that the coating roller can apply the coating.

[0017] In conjunction with the first aspect, in an optional embodiment of this application, the production apparatus further includes a drying mechanism, which is disposed at the rear end of the pressing roller and is used to dry the pressed material and selectively convey the dried material to a coating mechanism or a winding device.

[0018] In the above implementation process, a drying mechanism is set at the rear end of the pressing roller to dry the membrane layer after it is pressed by the pressing roller, remove the solvent in the membrane layer, so that the dried and structurally stable coated filter material can be transported to the coating mechanism or winding device at the rear end.

[0019] In conjunction with the first aspect, in an optional embodiment of this application, the coating mechanism includes a preheating roller, a pressure roller disposed at the rear end of the preheating roller, and a heating roller. The preheating roller is disposed at the rear end of the drying mechanism, and the pressure roller and the heating roller are disposed at a distance from each other to form a gap. Both the filter material unwinding mechanism and the drying mechanism can selectively convey the material to the preheating roller, the preheating roller conveys the preheated material to the gap, the pressure roller and the heating roller perform hot pressing on the material in the gap, and convey the hot-pressed material to the winding device.

[0020] Optionally, the preheating roller includes a first roller and a second roller, so that the material passes through the first roller and the second roller in an S-shape to the gap.

[0021] Optionally, the coating mechanism may also include a press for applying pressure to the pressure rollers and adjusting the thickness of the gap.

[0022] In the above implementation process, using the membrane filter material production line provided in this application example, the filter material unwinding mechanism can be used to transport the unwound filter material to the preheating roller, or the coating mechanism can be used to transport the coated membrane filter material to the preheating roller to preheat the filter material or coated membrane filter material. Then, the preheated material is transported to the gap between the pressure roller and the heating roller. At the same time, the microporous membrane unwinding mechanism transports the unwound microporous membrane to the gap between the pressure roller and the heating roller. The pressure roller and the heating roller are used to hot press the material extending into the gap to form hot-pressed membrane filter material or coated hot-pressed membrane filter material.

[0023] In conjunction with the first aspect, in an optional embodiment of this application, the production apparatus further includes a shaping mechanism disposed at the rear end of the coating mechanism. Both the drying mechanism and the coating mechanism can selectively convey the material to the shaping mechanism, and the shaping mechanism conveys the shaped material to the winding device.

[0024] In the above process, a shaping mechanism is set at the rear end of the coating mechanism. The drying mechanism can transport the dried coated filter material to the shaping mechanism for shaping. The coating mechanism can transport the hot-pressed coated filter material to the shaping mechanism for shaping, ensuring coating firmness and coating firmness, improving the structural stability of the coated filter material, and then transporting it to the winding device for winding, thereby improving the quality of the product.

[0025] In conjunction with the first aspect, in an optional embodiment of this application, the production apparatus further includes a slitting mechanism disposed between the shaping mechanism and the winding device, the slitting mechanism being used to slit the material output from the shaping mechanism.

[0026] In the above process, the shaping mechanism transports the shaped material to the slitting mechanism, which can then slit the material according to size requirements.

[0027] In conjunction with the first aspect, in an optional embodiment of this application, the production apparatus further includes a correction mechanism disposed between the shaping mechanism and the slitting mechanism. The correction mechanism is used to correct the material output from the heat shaping mechanism and then convey the corrected material to the slitting mechanism.

[0028] In the above implementation process, before the material is cut, the material is corrected by a correction mechanism so that the material runs in the center of the production line without deviation, which is beneficial to the cutting quality of the subsequent cutting mechanism.

[0029] In conjunction with the first aspect, in an optional embodiment of this application, the unwinding device further includes a guiding mechanism disposed at the rear end of the filter media unwinding mechanism, the guiding mechanism being used to selectively transport the filter media unwound by the filter media unwinding mechanism to a coating mechanism or a film-coating mechanism.

[0030] Optionally, the guiding mechanism includes a slide rail, a support, and a guide roller. The two ends of the slide rail are located at the coating mechanism and the membrane coating mechanism, respectively. The guide roller is slidably connected to the slide rail through the support to selectively transport the filter material to the coating mechanism or the membrane coating mechanism.

[0031] Optionally, a counter is provided at the filter media unwinding mechanism to calculate the length of the unwound filter media.

[0032] In the above implementation process, a guide mechanism is set at the rear end of the filter media unwinding mechanism to connect the filter media unwound by the filter media unwinding mechanism with the guide roller. The guide roller is slidably connected to the guide rail through the support, and one end of the guide rail is located at the coating mechanism and the other end of the guide rail is located at the film coating mechanism. The unwound filter media can be transported to the coating mechanism or the film coating mechanism by sliding the guide roller along the guide rail.

[0033] A counter is installed at the filter media unwinding mechanism, which can calculate the length of each product by counting the length of the unwound filter media.

[0034] In conjunction with the first aspect, in an optional embodiment of this application, the unwinding device further includes a first material storage mechanism, which is disposed between the filter material unwinding mechanism and the guiding mechanism.

[0035] Optionally, the winding device includes a winding mechanism and a second material storage mechanism disposed at the front end of the winding mechanism.

[0036] In the above implementation process, a first storage mechanism is set at the rear end of the unwinding mechanism to store the unwound filter material and adjust the tension of the filter material during the conveying process. A second storage mechanism is set at the front end of the winding mechanism to store material and adjust the winding tension of the subsequent winding mechanism.

[0037] In a second aspect, an example of this application provides a method for preparing a membrane filter material, which includes hot-pressed membrane filter material, coated membrane filter material, or coated hot-pressed membrane filter material, prepared using the membrane filter material production line provided in the first aspect.

[0038] The preparation method of hot-pressed membrane filter media includes: opening the filter media unwinding mechanism and the microporous membrane unwinding mechanism, conveying the filter media and microporous membrane to the membrane coating mechanism, hot-pressing the stacked filter media and microporous membrane to form hot-pressed membrane filter media; and then conveying the hot-pressed membrane filter media to the winding device.

[0039] The preparation method of coated and membrane-coated filter media includes: opening the filter media unwinding mechanism, conveying the filter media to the coating mechanism for slurry coating to form coated and membrane-coated filter media; and then conveying the coated and membrane-coated filter media to the winding device.

[0040] The preparation method of coated hot-pressed membrane filter media includes: opening the filter media unwinding mechanism, conveying the filter media to the coating mechanism for slurry coating to form coated membrane filter media, conveying the coated membrane filter media to the coating mechanism, and simultaneously opening the microporous membrane unwinding mechanism to convey the microporous membrane to the coating mechanism, hot-pressing the stacked coated membrane filter media and microporous membrane to form coated hot-pressed membrane filter media; and then conveying the coated hot-pressed membrane filter media to the winding device.

[0041] Optionally, the filter media is selected from woven fiber fabrics.

[0042] Optionally, the raw materials for the fiber textile fabric are selected from one or both of inorganic and organic fibers.

[0043] Optionally, the raw material for the fiber textile is selected from at least one of glass fiber, basalt fiber, polypropylene fiber, polyethylene fiber, polyimide fiber, PET fiber, P84 fiber, PTFE fiber, Kevlar fiber, aramid fiber or PA fiber.

[0044] Optionally, the microporous membrane is selected from polytetrafluoroethylene microporous membranes.

[0045] Optionally, the polytetrafluoroethylene microporous membrane has a thickness of 50-200 μm, a pore size of 0.2-2 μm, and a porosity of not less than 80%.

[0046] Optionally, the hot pressing temperature is 355-375℃, the coating speed is 2-8m / min, and the pressure is 0.5-0.8MPa.

[0047] Optionally, the slurry is selected from polytetrafluoroethylene mixed emulsions.

[0048] Optionally, the coating speed is 2-5 m / min.

[0049] Optionally, the coating temperature is 35-45℃.

[0050] In the above implementation process, the membrane filter production line provided in this application example can be used to prepare hot-pressed membrane filter media, coated membrane filter media, or coated hot-pressed membrane filter media according to product requirements.

[0051] In the preparation of hot-pressed membrane filter media, the unwound fiber woven fabric filter media is transported to the membrane coating mechanism using a filter media unwinding mechanism, while the unwound polytetrafluoroethylene microporous membrane is transported to the membrane coating mechanism using a microporous membrane unwinding mechanism. The polytetrafluoroethylene microporous membrane and the fiber woven fabric filter media are hot-pressed at a membrane coating speed of 2-8 m / min, at a temperature of 355-375℃ and a pressure of 0.5-0.8 MPa.

[0052] When preparing coated filter media, the unwound fiber textile filter media is transported to the coating mechanism using a filter media unwinding mechanism, and the unwound polytetrafluoroethylene microporous membrane is transported to the coating mechanism using a microporous membrane unwinding mechanism. At a coating speed of 2-5 m / min and a temperature of 35-45℃, a polytetrafluoroethylene mixed emulsion is coated on the fiber textile filter media.

[0053] In preparing coated and hot-pressed membrane filter media, the unwound fiber textile filter media is transported to the coating mechanism using a filter media unwinding mechanism, while the unwound polytetrafluoroethylene (PTFE) microporous membrane is transported to the coating mechanism using a microporous membrane unwinding mechanism. At a coating speed of 2-5 m / min and a temperature of 35-45°C, a PTFE mixed emulsion is coated onto the fiber textile filter media. The coated and membrane-covered filter media is then transported to the coating mechanism, and the unwound PTFE microporous membrane is simultaneously transported to the coating mechanism using the microporous membrane unwinding mechanism. At a coating speed of 2-8 m / min, and at a temperature of 355-375°C and a pressure of 0.5-0.8 MPa, the PTFE microporous membrane and the coated and membrane-covered filter media are hot-pressed. Attached Figure Description

[0054] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0055] Figure 1 A floor plan of a membrane filter media production line provided as an example in this application;

[0056] Figure 2 A schematic diagram illustrating the preparation of coated filter media using the membrane filter media production line provided in this application.

[0057] Figure 3 A schematic diagram illustrating the preparation of hot-pressed coated filter media using the coated filter media production line provided in this application example.

[0058] Icons: 1-Coated filter media production line; 10-Unwinding device; 11-Filter media unwinding mechanism; 12-Microporous membrane unwinding mechanism; 13-Guiding mechanism; 131-Slide rail; 132-Support; 133-Guide roller; 14-First storage mechanism; 20-Production device; 21-Coating mechanism; 211-Operating table; 212-Coating roller; 213-Pressure roller; 22-Coating mechanism; 221-Preheating roller; 222-Pressure roller; 223-Heating roller; 23-Drying mechanism; 24-Shaping mechanism; 25-Slitting mechanism; 26-Correction mechanism; 30-Rewinding device; 31-Second storage mechanism; 32-Rewinding mechanism; 100-Filter media; 200-Microporous membrane. Detailed Implementation

[0059] The embodiments of this application will be described in detail below with reference to examples. However, those skilled in the art will understand that the following examples are for illustrative purposes only and should not be considered as limiting the scope of this application. Unless otherwise specified in the examples, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments whose manufacturers are not specified are all commercially available conventional products.

[0060] Existing membrane filter media are mainly formed by laminating polytetrafluoroethylene (PTFE) microporous membranes with filter media. There are generally two lamination processes for PTFE microporous membranes with filter media: one is to hot-press expanded PTFE microporous membranes with micropore size and porous structure made of PTFE resin with filter media to form a hot-pressed membrane; the other is to coat a PTFE mixed emulsion with a coating process to form a coated membrane.

[0061] In order to improve the performance of membrane filter media, the applicant discovered that coating and hot pressing processes can be combined to prepare coated and hot-pressed membrane filter media.

[0062] However, the existing production equipment for membrane filter media has relatively limited functions and cannot meet the preparation requirements of various membrane filter media preparation processes.

[0063] Therefore, this application further improves the membrane filter media production line 1, thereby meeting the needs of various membrane filter media production processes to a certain extent. To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0064] Please see Figure 1The membrane filter production line 1 provided in this application includes an unwinding device 10, a production device 20 and a winding device 30 arranged in sequence.

[0065] The unwinding device 10 includes a filter media unwinding mechanism 11 and a microporous membrane unwinding mechanism 12. The production device 20 includes a coating mechanism 21 and a film-coating mechanism 22 disposed at the rear end of the coating mechanism 21.

[0066] The microporous membrane unwinding mechanism 12 is used to transport the microporous membrane 200 to the coating mechanism 22, and the filter media unwinding mechanism 11 can selectively transport the filter media 100 to the coating mechanism 21 or the coating mechanism 22.

[0067] The coating mechanism 21 is used to apply slurry coating to the filter media 100, and can optionally convey the coating material to the film coating mechanism 22 or the winding device 30.

[0068] The coating mechanism 22 is used to hot press the microporous membrane 200 with the filter material 100 or the coating material, and to convey the hot-pressed material to the winding device 30.

[0069] This application does not limit the specific structure and arrangement of the filter media unwinding mechanism 11 and the microporous membrane unwinding mechanism 12. In one possible embodiment, both the filter media unwinding mechanism 11 and the microporous membrane unwinding mechanism 12 include an unwinding shaft and a support for the unwinding shaft. The filter media 100 and the microporous membrane 200 are respectively wound onto their respective unwinding shafts. The unwinding shafts can rotate under the drive of a motor, thereby unwinding the filter media 100 or the microporous membrane 200 wound on the unwinding shafts.

[0070] Furthermore, the filter media unwinding mechanism 11 is used to selectively feed the filter media 100 to the coating mechanism 21 or the membrane-coating mechanism 22. In one possible embodiment, please refer to [link to relevant documentation]. Figure 1 The filter media unwinding mechanism 11 can be located at the front end of the coating mechanism 21 and the film covering mechanism 22.

[0071] Furthermore, the microporous membrane unwinding mechanism 12 is used to feed the microporous membrane 200 to the coating mechanism 22. In one possible embodiment, please refer to [link to related documentation]. Figure 1 The microporous membrane unwinding mechanism 12 can be positioned close to the coating mechanism 22.

[0072] Furthermore, to facilitate the optional feeding of filter media 100 from the filter media unwinding mechanism 11 to the coating mechanism 21 or the film-coating mechanism 22, in one possible embodiment, please continue to refer to... Figure 1The unwinding device 10 also includes a guiding mechanism 13. The guiding mechanism 13 includes a slide rail 131, a support 132, and a guide roller 133. The two ends of the slide rail 131 are located at the coating mechanism 21 and the film coating mechanism 22, respectively. The guide roller 133 is slidably connected to the slide rail 131 through the support 132, so as to selectively transport the filter material 100 to the coating mechanism 21 or the film coating mechanism 22.

[0073] Alternatively, in another possible embodiment, the filter media unwinding mechanism 11 may be provided with two unwinding shafts, which respectively transport the unwound filter media to the coating mechanism 21 or the film coating mechanism 22.

[0074] Furthermore, in order to facilitate the preparation of membrane filter media of a preset length, in one possible embodiment, a counter (not shown in the figure) can be provided at the unwinding shaft of the filter media unwinding mechanism 11.

[0075] This application does not limit the specific type of counter; the counter may be a commercially available meter counter.

[0076] Furthermore, a first storage mechanism 14 can be provided between the filter media unwinding mechanism 11 and the guiding mechanism 13. The first storage mechanism 14 can be used to store the unwound material and adjust the conveying tension of subsequent materials.

[0077] For example, in one possible embodiment, the first storage mechanism 14 includes a frame, with an input roller at the input end and an output roller at the output end. A lower storage rack and an upper storage rack are respectively provided between the input roller and the output roller. The lower storage rack is fixedly connected to the frame, and the upper storage rack is movably connected to the frame through a driving component. Both the upper and lower storage racks are provided with multiple guide wheels. The material passes through the rollers of the upper and lower storage racks in an S-shape. The driving component can adjust the distance between the upper and lower storage racks, thereby adjusting the tension.

[0078] Furthermore, a storage mechanism can also be provided at the rear end of the microporous membrane unwinding mechanism 12 to store the microporous membrane 200 and adjust the tension of the microporous membrane 200.

[0079] The coating mechanism 21 is used to apply slurry coating to the filter media 100. This application does not limit the specific structure of the coating mechanism 21. In one possible embodiment, please refer to [the following text]. Figure 1 The coating mechanism 21 includes an operating table 211, a coating roller 212, and a pressure roller 213. Both the coating roller 212 and the pressure roller 213 are located above the operating table 211.

[0080] The filter media unwinding mechanism 11 conveys the filter media 100 to the operating table 211. The coating roller 212 evenly coats the slurry onto the filter media 100. Then, the pressure roller 213 applies pressure to the coating to press out excess slurry and improve the uniformity of the coating.

[0081] Furthermore, the operating table 211 can be a conveying platform structure, which can convey the filter material to the operating table 211 at a certain speed, so that the filter material 100 passes through the coating roller 212 and the pressing roller 213 in sequence.

[0082] Furthermore, a heater can be installed at the operating table 211 to regulate the coating temperature.

[0083] Furthermore, the coating mechanism 21 may also be equipped with an adjuster that can adjust the distance between the coating roller 212 and the operating table 211, as well as adjust the rotation speed of the coating roller 212.

[0084] Furthermore, the coating mechanism 21 may also be equipped with a grouting machine (not shown in the figure) for injecting slurry into the filter media 100 on the operating table. The grouting machine is located at the front end of the coating roller 212.

[0085] Furthermore, the production device 20 may also be equipped with a drying mechanism 23. The drying mechanism 23 is located at the rear end of the pressure roller 213 and is used to dry the pressed material and selectively convey the dried material to the coating mechanism 22 or the winding device 30.

[0086] This application does not limit the specific structure of the drying mechanism 23. In one possible embodiment, the drying mechanism 23 may include a hot air blower and a conveyor roller. The conveyor roller may selectively convey the material to the coating mechanism 22 or the winding device 30.

[0087] Furthermore, this application does not limit how the conveyor rollers selectively transport the dried material to the coating mechanism 22 or the winding device 30. In one possible embodiment, a conveyor track can be provided, with its two ends located at the coating mechanism 22 and the winding device 30, respectively. The conveyor rollers are slidably connected to the conveyor track via a support member.

[0088] The coating mechanism 22 is used to hot-press the filter media 100 and the microporous membrane 200. This application does not limit the specific structure of the coating mechanism 22. In one possible embodiment, please refer to [the following text is missing]. Figure 1 The film coating mechanism 22 includes a preheating roller 221, a pressure roller 222 disposed at the rear end of the preheating roller 221, and a heating roller 223. The pressure roller 222 and the heating roller 223 are arranged at a distance from each other to form a gap so that the material can pass through the gap.

[0089] The preheating roller 221 is located at the rear end of the drying mechanism 23 and is used to preheat the filter material 100 unwound by the filter material unwinding mechanism 11 or the material conveyed by the drying mechanism 23. Then, the preheated material is conveyed to the gap between the pressure roller 222 and the heating roller 223 to perform hot pressing on the material, and the hot-pressed material is conveyed to the winding device 30.

[0090] Furthermore, the preheating roller 221 includes a first roller and a second roller, so that the material passes through the first roller and the second roller in an S-shape to the gap between the pressure roller 222 and the heating roller 223.

[0091] A heating element can be installed inside the preheating roller 221 to heat the roller surface of the preheating roller 221, thereby preheating the material passing through the preheating roller 221.

[0092] The gap between the pressure roller 222 and the heating roller 223 can be adjusted by a press (not shown in the figure) to regulate the heating pressure.

[0093] Furthermore, the rotational speeds of the pressure roller 222 and the heating roller 223 can be adjusted by a motor to regulate the hot pressing speed of the material.

[0094] Heating wires can be installed inside the heating roller 223 to heat the roller surface of the heating roller 223.

[0095] Furthermore, the production device 20 may also be equipped with a shaping mechanism 24 to shape the material conveyed by the film coating mechanism 22 and the coating mechanism 21 to the winding device 30.

[0096] For example, the shaping mechanism 24 includes a heater and a conveyor table to heat and shape the material and convey the shaped material to the rear end.

[0097] Furthermore, the production device 20 may also be equipped with a slitting mechanism 25 to slit the material before winding into a set width.

[0098] For example, the slitting mechanism 25 includes a conveyor table and a slitting blade, which is positioned above the conveyor table via a movable component. The conveyor table transports material, and the movable component moves the slitting blade to a set position close to the conveyor table to slit the material on the conveyor table. The conveyor table then transports the slit material to the winding device 30.

[0099] Furthermore, a correction mechanism 26 can be set between the shaping mechanism 24 and the slitting mechanism 25 to correct the position of the material before slitting and improve the slitting quality.

[0100] For example, the correction mechanism 26 includes a correction roller, a detector, and a controller. The detector detects the position of the material during the conveying process and sends the position data to the controller, which controls the deflection of the correction roller. For example, the detector is located at the conveyor table of the shaping mechanism 24 to detect the offset of the material at the conveyor table.

[0101] Furthermore, a coding mechanism (not shown in the figure) can be set up at the front end of the shaping mechanism 24 to spray trademark codes onto the material before heat shaping.

[0102] The winding device 30 is used to wind up the material prepared by the production device 20. This application does not limit the specific structure of the winding device 30. In one possible embodiment, the winding device 30 includes a second storage mechanism 31 and a winding mechanism 32 disposed at the rear end of the second storage mechanism 31.

[0103] The slitting mechanism 25 transports the slitting material to the second storage mechanism 31 for further storage, and the second storage mechanism 31 transports the material to the rear winding mechanism 32 for winding.

[0104] For example, the second storage mechanism 31 and the first storage mechanism 14 have the same structure, and can store materials and adjust the conveying tension of the materials.

[0105] For example, the winding mechanism 32 may include a variety of winding shafts to wind up coated membrane filter media, hot-pressed membrane filter media and coated hot-pressed membrane filter media respectively.

[0106] Furthermore, this application also provides a method for preparing coated filter media using a coated filter media production line 1.

[0107] Please refer to Figure 2 In preparing the coated filter material, the filter material unwinding mechanism 11 is opened to unwind the filter material 100. After unwinding, the filter material 100 passes sequentially through the first storage mechanism 14 and the guiding mechanism 13. The guide roller 133 in the guiding mechanism 13 pulls the filter material 100 to the operating table 211 at the coating mechanism 21. During the conveying process at the operating table 211, it passes sequentially through the coating roller 212 and the pressing roller 213, and then is conveyed to the drying mechanism 23 for drying. The dried coated filter material is then conveyed sequentially to the coding mechanism for coding, and then to the setting mechanism 24 for heat setting. After heat setting, the coated filter material passes sequentially through the web guiding mechanism 26 and the slitting mechanism 25. After slitting, it is conveyed to the second storage mechanism 31, and then from the second storage mechanism 31 to the winding mechanism 32 for winding.

[0108] In one possible embodiment, the filter media 100 may be selected from fibrous woven fabrics.

[0109] Furthermore, the raw materials for the fiber textile fabric are selected from one or two of inorganic or organic fibers.

[0110] For example, the raw materials for the fiber textile are selected from at least one of glass fiber, basalt fiber, polypropylene fiber, polyethylene fiber, polyimide fiber, PET fiber, P84 fiber, PTFE fiber, Kevlar fiber, aramid fiber or PA fiber.

[0111] In one possible embodiment, the slurry is selected from polytetrafluoroethylene mixed emulsions.

[0112] Furthermore, the coating speed is 2-5 m / min.

[0113] Furthermore, the coating temperature is 35-45℃.

[0114] Please refer to Figure 3 In preparing the hot-pressed coated filter media, the filter media unwinding mechanism 11 is opened to unwind the filter media 100. The unwound filter media 100 passes sequentially through the first storage mechanism 14 and the guiding mechanism 13. The guide roller 133 in the guiding mechanism 13 pulls the filter media 100 to the preheating roller 221 at the coating mechanism 22. The microporous membrane unwinding mechanism 12 is opened to unwind the microporous membrane 200. After passing through the storage mechanism, the unwound microporous membrane 200, together with the filter media 100, is conveyed to the gap between the pressure roller 222 and the heating roller 223 for hot pressing. The hot-pressed coated filter media is then conveyed sequentially to the coding mechanism for coding, and then to the shaping mechanism 24 for heat setting. The heat-set hot-pressed coated filter media passes sequentially through the correction mechanism 26 and the slitting mechanism 25. After slitting, it is conveyed to the second storage mechanism 31, and then from the second storage mechanism 31 to the winding mechanism 32 for winding.

[0115] In one possible embodiment, the microporous membrane 200 may be selected from polytetrafluoroethylene microporous membranes.

[0116] For example, the thickness of the polytetrafluoroethylene microporous membrane is 50-200 μm, the pore size is 0.2-2 μm, and the porosity is not less than 80%.

[0117] For example, the thickness of the polytetrafluoroethylene microporous membrane can be one of 50 μm, 100 μm, 150 μm or 200 μm or any combination thereof.

[0118] For example, the pore size of the polytetrafluoroethylene microporous membrane can be one of 0.2 μm, 0.5 μm, 1 μm, 1.5 μm or 2 μm or any range between two of them.

[0119] Furthermore, the hot pressing temperature can be one of 355°C, 360°C, 365°C, 370°C, or 375°C, or any range between two of them.

[0120] Furthermore, the coating speed can be one of 2 m / min, 3 m / min, 4 m / min, 5 m / min, 6 m / min, 7 m / min or 8 m / min or any combination thereof.

[0121] For example, the pressure of hot pressing can be one of 0.5 MPa, 0.6 MPa, 0.7 MPa or 0.8 MPa or any combination thereof.

[0122] Please continue reading for more details. Figure 1In the preparation of coated and hot-pressed membrane filter media, the filter media unwinding mechanism 11 is opened to unwind the filter media 100. The unwound filter media 100 passes sequentially through the first storage mechanism 14 and the guiding mechanism 13. The guide roller 133 in the guiding mechanism 13 pulls the filter media 100 to the operating table 211 at the coating mechanism 21. During the conveying process on the operating table 211, it passes sequentially through the coating roller 212 and the pressing roller 213, and then is conveyed to the drying mechanism 23 for drying. The drying mechanism 23 conveys the dried coated and membrane filter media to the preheating roller 221 in the coating mechanism 22 for preheating. The microporous membrane unwinding mechanism 12 is opened to unwind the microporous membrane 200. After the unwound microporous membrane 200 passes through the storage mechanism, it is conveyed together with the coated and membrane filter media output from the preheating roller 221 to the gap between the pressing roller 222 and the heating roller 223 for hot pressing. The hot-pressed coated filter material is sequentially conveyed to the inkjet printing mechanism for inkjet printing, and then conveyed to the shaping mechanism 24 for heat shaping. After heat shaping, the hot-pressed coated filter material passes sequentially through the web-correcting mechanism 26 and the slitting mechanism 25, and after slitting, it is conveyed to the second storage mechanism 31, and then from the second storage mechanism 31 to the winding mechanism 32 for winding.

[0123] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A membrane filter media production line, characterized in that, According to the process direction, the membrane filter material production line includes an unwinding device, a production device, and a winding device arranged in sequence. The unwinding device includes a filter media unwinding mechanism and a microporous membrane unwinding mechanism. The production device includes a coating mechanism and a membrane coating mechanism located at the rear end of the coating mechanism. The unwinding device also includes a guiding mechanism located at the rear end of the filter media unwinding mechanism. The guiding mechanism is used to selectively transport the filter media unwound by the filter media unwinding mechanism to the coating mechanism or the membrane coating mechanism. The guiding mechanism includes a slide rail, a support, and a guide roller. The two ends of the slide rail are located at the coating mechanism and the membrane coating mechanism, respectively. The guide roller is slidably connected to the slide rail through the support to selectively transport the filter media to the coating mechanism or the membrane coating mechanism. The microporous membrane unwinding mechanism is used to transport the microporous membrane to the coating mechanism, and the filter material unwinding mechanism can selectively transport the filter material to the coating mechanism or the coating mechanism; The coating mechanism is used to apply a slurry coating to the filter material, and can optionally convey the coating material to the film-coating mechanism or the winding device; the film-coating mechanism is used to hot-press the microporous membrane with the filter material or the coating material, and convey the hot-pressed material to the winding device; The coating mechanism includes an operating table, a coating roller, and a pressing roller, with the coating roller and the pressing roller positioned above the operating table; the filter material unwinding mechanism can selectively transport the filter material to the operating table, and the coating roller and the pressing roller sequentially coat and press the filter material with slurry; The production apparatus also includes a drying mechanism, which is located at the rear end of the pressing roller and is used to dry the pressed material and selectively convey the dried material to the coating mechanism or the winding device. The coating mechanism includes a preheating roller, a pressure roller disposed at the rear end of the preheating roller, and a heating roller. The preheating roller is disposed at the rear end of the drying mechanism, and the pressure roller and the heating roller are spaced apart to form a gap. Both the filter media unwinding mechanism and the drying mechanism can selectively convey the material to the preheating roller. The preheating roller conveys the preheated material to the gap. The pressure roller and the heating roller hot-press the material in the gap and convey the hot-pressed material to the winding device.

2. The membrane filter material production line according to claim 1, characterized in that, The coating mechanism also includes a grouting machine for injecting the grout into the filter material on the operating table.

3. The membrane filter material production line according to claim 1, characterized in that, The preheating roller includes a first roller and a second roller, so that the material passes through the first roller and the second roller in an S-shape to the gap; And / or, the coating mechanism further includes a press for applying pressure to the pressure roller to adjust the thickness of the gap.

4. The membrane filter material production line according to claim 3, characterized in that, The production apparatus also includes a shaping mechanism located at the rear end of the coating mechanism. Both the drying mechanism and the coating mechanism can selectively convey the material to the shaping mechanism, and the shaping mechanism conveys the shaped material to the winding device.

5. The membrane filter material production line according to claim 4, characterized in that, The production apparatus further includes a slitting mechanism disposed between the shaping mechanism and the winding device, the slitting mechanism being used to slit the material output from the shaping mechanism.

6. The membrane filter material production line according to claim 5, characterized in that, The production apparatus further includes a correction mechanism disposed between the shaping mechanism and the slitting mechanism. The correction mechanism is used to correct the deviation of the material output by the shaping mechanism, and then convey the corrected material to the slitting mechanism.

7. The membrane filter material production line according to any one of claims 1-6, characterized in that, A counter is provided at the filter media unwinding mechanism to calculate the length of the unwound filter media.

8. The membrane filter material production line according to claim 7, characterized in that, The unwinding device further includes a first material storage mechanism, which is disposed between the filter material unwinding mechanism and the guiding mechanism.

9. The membrane filter material production line according to claim 8, characterized in that, The winding device includes a winding mechanism and a second material storage mechanism disposed at the front end of the winding mechanism.

10. A method for preparing a membrane filter material, characterized in that, The membrane filter material includes hot-pressed membrane filter material, coated membrane filter material, or coated hot-pressed membrane filter material, and is prepared using the membrane filter material production line according to any one of claims 1-9; The method for preparing the hot-pressed membrane filter material includes: opening the filter material unwinding mechanism and the microporous membrane unwinding mechanism, conveying the filter material and the microporous membrane to the membrane coating mechanism, hot-pressing the stacked filter material and microporous membrane to form the hot-pressed membrane filter material; and then conveying the hot-pressed membrane filter material to the winding device. The preparation method of the coated membrane filter material includes: opening the filter material unwinding mechanism, conveying the filter material to the coating mechanism for slurry coating to form a coated membrane filter material; and then conveying the coated membrane filter material to the winding device. The preparation method of the coated hot-pressed membrane filter material includes: opening the filter material unwinding mechanism, conveying the filter material to the coating mechanism for slurry coating to form coated membrane filter material, conveying the coated membrane filter material to the coating mechanism, simultaneously opening the microporous membrane unwinding mechanism to convey the microporous membrane to the coating mechanism, hot-pressing the stacked coated membrane filter material and the microporous membrane to form the coated hot-pressed membrane filter material; and then conveying the coated hot-pressed membrane filter material to the winding device.

11. The preparation method according to claim 10, characterized in that, The filter media is selected from woven fiber fabrics; And / or, the filter material is selected from fiber textile fabric, and the raw material of the fiber textile fabric is selected from one or two of inorganic fibers or organic fibers; And / or, the filter material is selected from fiber textile fabric, and the raw material of the fiber textile fabric is selected from at least one of glass fiber, basalt fiber, polypropylene fiber, polyethylene fiber, polyimide fiber, PET fiber, P84 fiber, PTFE fiber, Kevlar fiber, aramid fiber or PA fiber. And / or, the microporous membrane is selected from polytetrafluoroethylene microporous membranes; And / or, the microporous membrane is selected from polytetrafluoroethylene (PTFE) microporous membranes, wherein the PTFE microporous membrane has a thickness of 50-200 μm, a pore size of 0.2-2 μm, and a porosity of not less than 80%; And / or, the hot pressing temperature is 355-375 ℃, the coating speed is 2-8 m / min, and the pressure is 0.5-0.8 MPa; And / or, the slurry is selected from polytetrafluoroethylene mixed emulsions; And / or, the coating speed is 2-5 m / min; And / or, the coating temperature is 35-45 °C.

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