A multi-process integrated intelligent PTFE hydrophilic modification treatment device

Abstract

This utility model belongs to the technical field of PTFE modification equipment, specifically relating to a multi-process integrated intelligent PTFE hydrophilic modification device. It includes an unwinding unit for unwinding and a first water tank unit, a steam generating unit, a second water tank unit, a shaping and drying unit, and a rewinding unit arranged sequentially. The first water tank unit includes a first water tank, a first wetting roller arranged in a meandering pattern within the first water tank, and a first exhaust hood installed on top of the first water tank. A first squeezing mechanism is installed inside the first exhaust hood. The steam generating unit includes a steam tank, a transfer roller installed on the steam tank, and a second exhaust hood covering the transfer roller. This utility model integrates multiple modification processes, completing the roll material modification in one step within the device, ensuring the continuity of modification, resulting in good roll material modification effects, which is beneficial for subsequent production and ensures product quality.

Description

Technical Field

[0001] This utility model belongs to the technical field of PTFE modification equipment, specifically relating to a multi-process integrated intelligent PTFE hydrophilic modification device. Background Technology

[0002] PTFE is a completely symmetrical, unbranched linear polymer. The entire PTFE molecule contains only carbon (C) and fire (F) atoms, with the CF2 groups running along the polymer chain. The small radius of the fire atom and its tight bond with the backbone carbon atoms cause the orientation of adjacent CF2 units to not be completely trans-cross-aligned, but rather to form a twisted chain with a helical shape. Therefore, it is highly crystalline, with a crystallinity greater than 92%, exhibiting excellent resistance to strong acids and alkalis, making it suitable for water treatment and material separation. However, PTFE itself is a superhydrophobic material, and PTFE-processed roll materials cannot be directly used in water treatment; hydrophilic modification treatment is required.

[0003] However, existing PTFE hydrophilic modification equipment has poor continuity during use. During the modification process, the roll material needs to be transported and dehydrated repeatedly, and then transported back to the modification equipment for modification. This process is repeated, resulting in low production efficiency, poor modification continuity, and unsatisfactory modification effect, which is not conducive to the processing and production of roll materials. Utility Model Content

[0004] The purpose of this invention is to provide a multi-process integrated intelligent PTFE hydrophilic modification device that can integrate multiple modification processes and complete the modification of roll materials in one go within the device, ensuring the continuity of modification, thereby achieving good modification effect of roll materials, which is beneficial to subsequent production and ensures product quality.

[0005] The specific technical solution adopted by this utility model is as follows: A multi-process integrated intelligent PTFE hydrophilic modification treatment device includes an unwinding unit for unwinding and a first water tank unit, a steam generating unit, a second water tank unit, a shaping and drying unit, and a winding unit arranged in sequence. The first water tank unit includes a first water tank, a first wetting roller arranged in a meandering manner inside the first water tank, and a first exhaust hood installed on the top of the first water tank. A first squeezing mechanism is installed inside the first exhaust hood. The steam generating unit includes a steam box, a transfer roller mounted on the steam box, and a second exhaust hood covering the transfer roller. An exhaust fan for exhausting air is also mounted on the second exhaust hood. The second water tank unit includes a second water tank, a second wetting roller mounted on the second water tank and arranged in a meandering manner inside the second water tank, and a second squeezing mechanism mounted on the second water tank.

[0006] As a preferred embodiment, the unwinding unit includes an unwinding bracket, an unwinding roller detachably mounted on the unwinding bracket, and an auxiliary roller mounted at the exit end of the unwinding bracket, wherein at least two sets of the auxiliary roller are provided.

[0007] As a preferred embodiment, the first dewatering mechanism includes a vertical support and a mirror roller and a fluororubber pressure roller mounted on the vertical support, and the roll material is dewatered by the mirror roller and the fluororubber pressure roller.

[0008] As a preferred embodiment, the second water-squeezing mechanism has the same structure as the first water-squeezing mechanism, and the second water tank is also covered with a third exhaust hood to prevent steam diffusion.

[0009] As a preferred embodiment, the shaping and drying unit includes a drying chamber and a hot roller rotatably mounted on the drying chamber. Feed rollers and discharge rollers for assisting the movement of the roll material are rotatably mounted on both sides of the hot roller.

[0010] As a preferred embodiment, the top of the drying chamber is also equipped with a fourth exhaust hood for absorbing water vapor, and the drying chamber is also equipped with a temperature monitor for monitoring the temperature of the hot roller to control the setting temperature of the hot roller.

[0011] As a preferred embodiment, the winding unit includes a winding bracket, a winding roller detachably mounted on the winding bracket, and a positioning roller mounted at the inlet of the winding bracket, wherein a guide roller for guiding the roll material is installed between the winding roller and the positioning roller.

[0012] The technical effects achieved by this utility model are as follows: This invention, through the coordinated arrangement of a first water tank unit, a steam generating unit, a second water tank unit, and a shaping and drying unit, enables the roll material to undergo initial impregnation followed by steam modification, then further impregnation, and finally shaping via hot rollers. Multiple impregnations enhance the penetration depth and uniformity of the modifier. The repeated impregnation-draining process gradually breaks down the hydrophobic barrier of the fluorocarbon chain, allowing the hydrophilic agent to penetrate deep into the membrane fibers. This creates a hydrophilic gradient from the surface to the interior of the membrane, preventing pore blockage caused by excessive surface coating. Simultaneously, the humid and hot environment provided by steam prevents thermal damage. Furthermore, the humid and hot conditions accelerate the reaction between the hydrophilic agent and the crosslinking agent, forming a three-dimensional network structure. Hot roller shaping applies directional pressure and thermal relaxation, eliminating internal membrane stress during modification and preventing deformation during subsequent use. Hot pressing forms a thin and uniform coating layer of hydrophilic agent on the PTFE fiber surface, reducing pore blockage and improving production efficiency. The entire device integrates various processes, making the process flow more standardized and intelligent, resulting in high continuity, good modification effect, and high efficiency in the modification of roll materials. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the multi-process integration structure of this utility model embodiment; Figure 2 This is a schematic diagram of the combined structure of the unwinding unit and the first water tank unit in an embodiment of this utility model; Figure 3 This is a schematic diagram of the steam generating unit in an embodiment of this utility model; Figure 4 This is a schematic diagram of the structure of the second water tank unit in this embodiment of the present invention; Figure 5 This is a schematic diagram of the combined structure of the shaping and drying unit and the winding unit in an embodiment of this utility model.

[0014] The attached diagram lists the components represented by each number as follows: 1. Unwinding unit; 11. Unwinding support; 12. Unwinding roller; 13. Auxiliary roller; 2. First water tank unit; 21. First water tank; 22. First immersion roller; 23. First exhaust hood; 24. First water squeezing mechanism; 3. Steam generating unit; 31. Steam box; 32. Conveyor roller; 33. Second exhaust hood; 34. Exhaust fan; 4. Second water tank unit; 41. Second water tank; 42. Second immersion roller; 43. Third exhaust hood; 44. Second water squeezing mechanism; 5. Shaping and drying unit; 51. Drying oven; 52. Feed roller; 53. Hot roller; 54. Fourth exhaust hood; 55. Discharge roller; 6. Rewinding unit; 61. Rewinding bracket; 62. Rewinding roller; 63. Positioning roller; 64. Guide roller. Detailed Implementation

[0015] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0016] like Figures 1-5As shown, a multi-process integrated intelligent PTFE hydrophilic modification treatment device includes an unwinding unit 1 for unwinding and a first water tank unit 2, a steam generating unit 3, a second water tank unit 4, a shaping and drying unit 5, and a winding unit 6 arranged sequentially. The unwinding unit 1 supports the unwinding of the roll material, which then passes through the first water tank unit 2 for initial wetting, gradually breaking down the hydrophobic barrier of the fluorocarbon chain. After that, it passes through the steam generating unit 3 for low-temperature and high-efficiency cross-linking. Next, it passes through the second water tank unit 4 for secondary wetting. Through repeated wetting-draining processes, the hydrophilic agent penetrates deep into the membrane fiber. Finally, it passes through the shaping and drying unit 5, where directional pressure and thermal relaxation are applied to eliminate the internal stress of the membrane during the modification process. After being wound up by the winding unit 6, the hydrophilic modification treatment is completed.

[0017] See attached document Figure 2 The unwinding unit 1 includes an unwinding bracket 11, an unwinding roller 12 detachably mounted on the unwinding bracket 11, and an auxiliary roller 13 mounted at the outlet end of the unwinding bracket 11. In this embodiment, the auxiliary roller 13 is provided in three sets, two of which are horizontally arranged to facilitate the unwinding of the roll material, and the other set is located at the outlet of the unwinding bracket 11 to avoid friction between the roll material and the unwinding bracket 11.

[0018] Please refer to the appendix again. Figure 2 The first water tank unit 2 includes a first water tank 21, a first impregnation roller 22 arranged in a meandering manner inside the first water tank 21, and a first exhaust hood 23 installed on the top of the first water tank 21. In this embodiment, ten sets of the first impregnation roller 22 are provided and are installed in the first water tank 21 in a crisscross manner. By repeatedly winding the roll material around the surface of the first impregnation roller 22, it can be ensured that the roll material is completely impregnated, thereby ensuring the modification effect.

[0019] Furthermore, a first dewatering mechanism 24 is installed inside the first exhaust hood 23, which includes a vertical support and a mirror roller and a fluororubber pressure roller mounted on the vertical support. By combining the mirror roller and the fluororubber pressure roller facing each other between the vertical support, the roll material can be squeezed and dewatered when it passes between the mirror roller and the fluororubber pressure roller, which facilitates the next process. At the same time, the first exhaust hood 23 is installed on the top and connected to the exhaust pipe, through which water vapor is discharged outdoors.

[0020] It should be noted that the liquid in the first water tank 21 can contain organic acid solutions with polar groups, highly corrosive activators, aqueous dispersions, or bio-based modifiers. In this embodiment, the liquid in the first water tank 21 is a PTFE dispersion (such as Algoflon D series), which is used for coating or impregnation and has both wettability and high shear stability.

[0021] See attached document Figure 3The steam generating unit 3 includes a steam box 31, a transfer roller 32 mounted on the steam box 31, and a second exhaust hood 33 covering the transfer roller 32. The coil material is gradually transferred to the second exhaust hood 33. Simultaneously, distributed steam channels and stainless steel sintered gas pipes within the steam box 31 evenly distribute high-temperature steam within the box, providing a humid and hot environment (100-120℃) for the coil material, far below the melting point of PTFE (327℃), thus preventing heat damage. The humid and hot conditions accelerate the reaction between hydrophilic agents (such as PVAc hydrolysate) and crosslinking agents (such as glutaraldehyde), forming a three-dimensional network structure. An exhaust fan 34 is also installed on the second exhaust hood 33 for exhausting steam. The exhaust fan 34 can be connected to an exhaust pipe to discharge hot steam outdoors. The exhaust fan 34 can also control and adjust its frequency to provide different levels of negative pressure, thereby regulating the temperature within the steam box 31.

[0022] See attached document Figure 4 After steam evaporation, the roll material enters the second water tank unit 4, which includes a second water tank 41, a second wetting roller 42 mounted in the second water tank 41 and arranged in a meandering manner inside the second water tank 41, and a second squeezing mechanism 44 mounted on the second water tank 41. The second wetting roller 42 is arranged in the same way as the first wetting roller 22, and the second squeezing mechanism 44 has the same structure as the first squeezing mechanism 24. The first squeezing mechanism 24 is also covered with a third exhaust hood 43, which can repeatedly wrap the roll material around the surface of the second wetting roller 42 for secondary wetting. At the same time, it undergoes secondary dehydration through the second squeezing mechanism 44, and the steam is discharged to the outside by the third exhaust hood 43. Through repeated wetting-exhausting process, the hydrophobic barrier of the fluorocarbon chain is gradually destroyed, allowing the hydrophilic agent to penetrate into the interior of the membrane fiber. This reduces the contact angle of the roll material from 135.6° to 58.7° (a reduction of 57%), significantly improving hydrophilicity.

[0023] See attached document Figure 5 The shaping and drying unit 5 includes a drying chamber 51, a hot roller 53 rotatably mounted on the drying chamber 51, and a feed roller 52 and a discharge roller 55 rotatably mounted on both sides of the hot roller 53, which can be used to assist the movement of the roll material, so that it can smoothly enter and exit the drying chamber 51 and make full contact with the surface of the hot roller 53, thereby applying directional pressure and thermal relaxation, eliminating the internal stress of the film during the modification process, avoiding deformation in subsequent use, and completing the modification of the roll material.

[0024] Furthermore, a fourth exhaust hood 54 is installed on the top of the drying chamber 51, which is connected to the exhaust pipe to absorb water vapor and discharge it outdoors to avoid affecting the temperature inside the drying chamber 51. At the same time, a temperature monitor is also installed on the drying chamber 51 to monitor the temperature of the hot roller 53, thereby controlling the setting temperature of the hot roller 53 as needed.

[0025] Please refer to the appendix again. Figure 5 The winding unit 6 includes a winding bracket 61, a winding roller 62 detachably mounted on the winding bracket 61, and a positioning roller 63 installed at the inlet of the winding bracket 61. Three sets of guide rollers 64 are installed between the winding roller 62 and the positioning roller 63, two of which are set at the same height and the other set is set close to the discharge roller 55, which can conveniently guide the roll material and make it smoothly wound onto the winding roller 62.

[0026] The working principle of this utility model is as follows: When in use, the roll material is first placed on the unwinding roller 12 and unwound outward through the auxiliary roller 13. Then the roll material enters the first water tank 21. The roll material is repeatedly wound around the surface of the first immersion roller 22 to ensure that the roll material is completely immersed. After that, it is squeezed and dehydrated by the first squeezing mechanism 24.

[0027] Secondly, the dehydrated roll material is conveyed to the second exhaust hood 33. At the same time, the distributed steam channels and stainless steel sintered gas pipes in the steam box 31 distribute high-temperature steam evenly in the box, which can provide a humid and hot environment for the roll material to accelerate the reaction between the hydrophilic agent and the crosslinking agent to form a three-dimensional network structure. Then, it enters the second water tank 41 and is repeatedly wound around the surface of the second impregnation roller 42 for secondary impregnation. At the same time, it undergoes secondary dehydration through the second squeezing mechanism 44. Through repeated impregnation-draining processes, the hydrophobic barrier of the fluorocarbon chain is gradually destroyed, allowing the hydrophilic agent to penetrate into the interior of the membrane fiber and significantly improving the hydrophilicity.

[0028] Finally, the roll material enters the drying chamber 51 and comes into full contact with the surface of the hot roller 53, thereby applying directional pressure and thermal relaxation to eliminate the internal stress of the film during the modification process, avoid deformation during subsequent use, and complete the modification of the roll material. At the same time, the modified roll material is wound up by the take-up roller 62.

[0029] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A multi-process integrated intelligent PTFE hydrophilic modification treatment device, characterized in that, It includes an unwinding unit (1) for unwinding and a first water tank unit (2), a steam generating unit (3), a second water tank unit (4), a shaping and drying unit (5), and a winding unit (6) arranged in sequence. The first water tank unit (2) includes a first water tank (21), a first immersion roller (22) arranged in a meandering manner inside the first water tank (21), and a first exhaust hood (23) installed on the top of the first water tank (21). A first squeezing mechanism (24) is installed inside the first exhaust hood (23). The steam generating unit (3) includes a steam box (31), a transfer roller (32) mounted on the steam box (31), and a second exhaust hood (33) covering the transfer roller (32). An exhaust fan (34) for exhausting is also mounted on the second exhaust hood (33). The second water tank unit (4) includes a second water tank (41), a second immersion roller (42) mounted on the second water tank (41) and arranged in a meandering manner inside the second water tank (41), and a second squeezing mechanism (44) mounted on the second water tank (41).

2. The multi-process integrated intelligent PTFE hydrophilic modification treatment device according to claim 1, characterized in that: The unwinding unit (1) includes an unwinding bracket (11), an unwinding roller (12) detachably mounted on the unwinding bracket (11), and an auxiliary roller (13) mounted at the outlet end of the unwinding bracket (11). The auxiliary roller (13) is provided in at least two sets.

3. The multi-process integrated intelligent PTFE hydrophilic modification treatment device according to claim 1, characterized in that: The first dewatering mechanism (24) includes a vertical support and a mirror roller and a fluororubber pressure roller mounted on the vertical support, and dewaters the roll material by squeezing through the mirror roller and the fluororubber pressure roller.

4. The multi-process integrated intelligent PTFE hydrophilic modification treatment device according to claim 1, characterized in that: The second water squeezing mechanism (44) has the same structure as the first water squeezing mechanism (24), and the second water tank (41) is also covered with a third exhaust hood (43) to prevent steam diffusion.

5. The multi-process integrated intelligent PTFE hydrophilic modification treatment device according to claim 1, characterized in that: The shaping and drying unit (5) includes a drying box (51) and a hot roller (53) rotatably mounted on the drying box (51). Feed roller (52) and discharge roller (55) for assisting the movement of the roll material are rotatably mounted on both sides of the hot roller (53).

6. The multi-process integrated intelligent PTFE hydrophilic modification treatment device according to claim 5, characterized in that: The top of the drying chamber (51) is also equipped with a fourth exhaust hood (54) for absorbing water vapor. The drying chamber (51) is also equipped with a temperature monitor for monitoring the temperature of the hot roller (53) to control the shaping temperature of the hot roller (53).

7. The multi-process integrated intelligent PTFE hydrophilic modification treatment device according to claim 1, characterized in that: The winding unit (6) includes a winding bracket (61), a winding roller (62) detachably mounted on the winding bracket (61), and a positioning roller (63) mounted at the inlet of the winding bracket (61). A guide roller (64) for guiding the roll material is installed between the winding roller (62) and the positioning roller (63).

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