Coating and shaping equipment for high-breathability PTFE waterproof breathable film

Abstract

The invention discloses coating and shaping equipment for a high-breathability PTFE (Polytetrafluoroethylene) waterproof breathable film, which comprises a rack, a base cloth supply device arranged on the rack, a coating device arranged on the rack and used for coating a liquid raw material on the base cloth, a first coagulating basin arranged on the rack and below the coating device, and a cloth in-pool guide device arranged on the rack and at the outlet of the coating device, the cloth in-pool guiding device comprises a plurality of height-adjustable material guiding frames arranged on the machine frame side by side and a water inlet roller guiding mechanism, input material guiding rollers are arranged on the material guiding frames, a plurality of cloth tensioning transition rollers are arranged in the first coagulating tank in the feeding direction, and the connecting line of all the cloth tensioning transition rollers is in a downwards-protruding arc shape. A water outlet guide roller is arranged at one end, far away from the water inlet roller, of the first coagulating tank; a plurality of heaters and a plurality of temperature sensors are arranged in the first coagulating tank; a tension control device for controlling the tension force of the cloth is arranged on the rack, and a traction pressing vehicle for sending out the cloth is arranged on the discharging side of the tension control device on the rack.

Description

Technical Field

[0001] The invention relates to a waterproof and breathable fabric manufacturing device, in particular to a coating and shaping device for a highly breathable PTFE waterproof and breathable film. Background Art

[0002] The fabric of the jacket is generally made of a combination of polyester and nylon fabrics. A layer of waterproof and breathable membrane is compounded underneath the outer fabric to produce a waterproof, breathable, and wear-resistant jacket fabric.

[0003] PTFE membrane is a waterproof and breathable membrane with very good stability compounded under the fabric. The membrane contains tens of thousands of capillary pores, which are about one ten-thousandth the size of a water droplet and 700 times larger than a gas molecule. It is waterproof and has good breathability.

[0004] The PTFE membrane manufactured by phase separation method has the advantages of simple process and low manufacturing cost. However, the coating effect of the disclosed coating and shaping equipment is not good enough, which makes it easy for bubbles to appear on the product and the number of air holes per unit area of ​​the produced PTFE membrane is relatively small, making the product performance not good enough. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a coating and shaping device which can improve the performance of a PTFE waterproof and breathable film.

[0006] In order to solve the above technical problems, the technical scheme adopted by the present invention is: a coating and shaping device for highly breathable PTFE waterproof and breathable film, comprising a frame, a base fabric supply device is provided on the frame, a coating device for coating liquid raw materials on the base fabric is provided on the frame, a first coagulation tank is provided on the frame below the coating device, a cloth entry pool guide device is provided on the frame at the outlet of the coating device, the cloth entry pool guide device comprises a plurality of height-adjustable guide racks and a water inlet roller guide mechanism arranged in parallel on the frame, an input guide roller is provided on the guide rack, a plurality of cloth tensioning transition rollers are provided in the first coagulation tank along the feeding direction, the connecting line of all the cloth tensioning transition rollers is in a circular arc shape convex downward, and a water outlet guide roller is provided at the end of the first coagulation tank away from the water inlet roller; a plurality of heaters and a plurality of temperature sensors are provided in the first coagulation tank; a tension control device for controlling the tensioning force of the cloth is provided on the frame, and a traction press for delivering the cloth is provided on the side of the tension control device discharging the material on the frame.

[0007] As a preferred solution, the coating device includes a coating frame arranged on a frame, a coating roller and a coating power device for driving the coating roller to rotate are rotatably provided on the coating frame, a vertically upwardly arranged lifting cylinder is hinged on the coating frame, a lifting frame is hinged on the coating frame above the material roller, and the end of the lifting frame is hinged to the end of the piston rod of the lifting cylinder; a scraper shaft is hinged on the lifting frame, a scraper is provided on the scraper shaft, and the end of the scraper is in an arc shape, and an adjustable stroke cylinder is hinged on the lifting frame, and the piston rod end of the adjusting cylinder is hinged to the driving block connected to the scraper shaft;

[0008] As a preferred solution, a pair of inverted L-shaped clamp arms are hinged on the coating frame, and a top mounting plate is mounted on the two inverted L-shaped clamp arms. A pair of guide seats arranged parallel to the cloth roller are provided on the top mounting plate, and a movable seat is slidably connected in the guide seat. Two back-to-back arranged material-blocking cylinders with adjustable stroke for driving the movable seat are provided on the top mounting plate, and a mounting bracket is provided on the movable seat, and a guide rail arranged radially along the cloth roller is provided on the mounting bracket, and a pressure block with adjustable position for pressing the edge of the base cloth is provided on the guide rail.

[0009] As a preferred solution, the coating frame is provided with a limiting device for limiting the position of the first scraper frame; the limiting device includes a limiting seat arranged on the coating frame, and the limiting seat is provided with a limiting bolt for pushing against the first scraper frame.

[0010] As a preferred solution, a detection device for detecting the edge of the base fabric is provided on the coating frame, and a detection signal of the detection device controls the movement of the piston rod of the material blocking cylinder.

[0011] As a preferred solution, the coating frame is provided with a fine-tuning drive mechanism for fine-tuning the position of the lifting frame, the fine-tuning drive mechanism includes a fine-tuning motor vertically arranged upward on the coating frame, a fine-tuning worm is provided on the output shaft of the fine-tuning motor, the fine-tuning worm cooperates with the fine-tuning worm wheel arranged on the coating frame, an eccentric shaft is connected to the worm wheel shaft of the fine-tuning worm wheel, a bearing is provided at the other end of the eccentric shaft, and the outer ring of the bearing is in free contact with the lower part of the lifting frame.

[0012] As a preferred solution, the connecting line of all the cloth tensioning transition rollers is in the shape of a downwardly convex circular arc with an arc angle in the range of 0.45-0.55.

[0013] As a preferred solution, the tension control device includes a connecting seat arranged on the frame, the connecting seat is provided with a rotating seat, the rotating seat is rotatably provided with a tensioning roller, and the connecting seat is provided with a tensioning cylinder with an adjustable stroke for driving the rotating seat to rotate to tension the cloth.

[0014] As a preferred solution, the water inlet roller guide mechanism includes a moving seat movably arranged on the first coagulation tank and a power mechanism driving the moving seat to move along the length direction of the first coagulation tank, a fixed guide roller is provided on the moving seat, a roller frame rotating around the axis of the fixed guide roller is hinged on the moving seat, a water inlet adjustment roller is provided on the roller frame, and an adjustment and limiting mechanism for adjusting the position of the roller frame is provided on the moving seat.

[0015] As a preferred solution, the adjustment and limiting mechanism includes an adjusting worm wheel arranged on the roller shaft of the fixed guide roller, an adjusting worm screw which cooperates with the adjusting worm wheel is rotatably provided on the movable seat, an adjusting hand wheel is provided at the end of the adjusting worm screw, and the roller frame is arranged on the roller shaft.

[0016] As a preferred solution, the power mechanism includes a pair of guide rails arranged on the notch of the first solidification groove, a drive shaft is rotatably provided on the movable seat, a pair of active rollers matching with the guide rails are sleeved on the drive shaft, a drive motor is provided on the movable seat, a drive worm is connected to the output shaft of the drive motor, a drive worm wheel matching with the drive worm is provided on the drive shaft, and at least one pair of driven rollers matching with the track are also provided on the movable seat.

[0017] The beneficial effects of the present invention are as follows: in the present coagulation fixing equipment, the scraper of the coating machine can accurately control the coating thickness, and the material guide frame with adjustable dry height and the water-entering roller guide mechanism of the material entering the pool guide device enable the coated base fabric to smoothly enter the coagulation tank to avoid the liquid material from drifting, and the line of the fabric tensioning transition roller in the coagulation tank is in a downwardly convex arc shape with an arc within the range of 0.45-0.55, which ensures the reliable tensioning of the base fabric in the coagulation tank, and makes the film surface tension on the side away from the base fabric greater than the other side, which is conducive to the formation of pores, thereby facilitating the acquisition of a PTFE waterproof and breathable film with a small thickness and dense pores per unit area. The water-entering roller guide mechanism avoids the generation of bubbles by adjusting the water entry angle of the base fabric, so that no bubble holes appear on the film, thereby improving the film quality.

[0018] A pair of inverted L-shaped clamp arms are hinged on the frame, a top mounting plate is mounted on the two inverted L-shaped clamp arms, a pair of guide seats arranged parallel to the cloth roller are arranged on the top mounting plate, a movable seat is slidably connected in the guide seat, two back-to-back arranged travel-adjustable material blocking cylinders for driving the movable seat are arranged on the top mounting plate, a mounting bracket is provided on the movable seat, a guide rail arranged radially along the cloth roller is provided on the mounting bracket, and a position-adjustable material blocking block is provided on the guide rail, so that the reliability of the coating operation can be reliably guaranteed even if the base cloth slides left and right.

[0019] Since a detection device for detecting the edge of the base fabric is provided on the frame, the detection signal of the detection device controls the movement of the piston rod of the material blocking cylinder, so the action of the material blocking cylinder can be controlled more quickly, further ensuring the reliability of the coating operation.

[0020] Since a fine-tuning drive mechanism for fine-tuning the position of the lifting frame is provided on the frame, the fine-tuning drive mechanism includes a fine-tuning motor vertically arranged on the frame, a fine-tuning worm is provided on the output shaft of the fine-tuning motor, the fine-tuning worm cooperates with a fine-tuning worm wheel provided on the frame, an eccentric shaft is connected to the worm wheel shaft of the fine-tuning worm wheel, a bearing is provided at the other end of the eccentric shaft, and an outer ring of the bearing is in free contact with the lower part of the lifting frame, so that the position of the lifting frame can be fine-tuned, so that the distance between the scraper and the surface of the base cloth can be accurately controlled, thereby greatly improving the precise thickness of the liquid layer of the cloth.

[0021] For the cloth entering the pool guide device, the tensioning arc of the base cloth is made appropriate through the height of the guide frame to minimize the flow of the coating raw material, and the position of the roller frame is adjusted by turning the adjustment hand wheel to change the position of the water entry adjustment roller, thereby changing the angle of the base cloth stretched on the outside of the water entry adjustment roller relative to the horizontal plane, so as to find a reasonable angle range for the base cloth to enter the groove to avoid the generation of bubbles, thereby improving the quality of film formation.

[0022] Since the material guide drop of all the guide rollers on the frame is not less than one-third of the height from the top surface of the coater outlet roller to the liquid level of the first coagulation tank, the slower descent of the base cloth makes it difficult for the material coated on its surface to drift, thus ensuring the quality of the subsequent finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the coating and shaping equipment.

[0024] Figure 2 It is a schematic diagram of the front structure of the coating device.

[0025] Figure 3 It is a schematic diagram of the side structure of the coating device.

[0026] Figure 4 It is a schematic diagram of the middle structure of the coating device (part of the structure is hidden for clarity).

[0027] Figure 5 This is another side structural schematic diagram of the coating device (part of the structure is hidden for clarity).

[0028] Figure 6 It is a schematic diagram of the structure of the fine-tuning mechanism in the coating device.

[0029] Figure 7 This is a schematic diagram of the structure of the fine-tuning mechanism in the coating device from another angle.

[0030] Figure 8 It is a schematic diagram of the structure of the cloth-entering-pool guiding device.

[0031] Fig. 9It is a structural schematic diagram of the water inlet roller guide mechanism.

[0032] Fig.10 It is a schematic diagram of the side structure of the water inlet roller guide mechanism.

[0033] Fig.11 This is another side structural diagram of the water inlet roller guide mechanism.

[0034] In the figure: 1 frame, 2 base cloth supply device, 3 coating device, 4 first coagulation tank, 5 cloth inlet guide device, 6 cloth tensioning transition roller, 7 water outlet guide roller; 8 tension control device, 9 traction press car;

[0035] 31 coating frame, 32 coating roller, 33 scraping worm wheel, 34 scraping worm, 35 adjusting hand wheel, 36 lifting cylinder, 37 lifting frame, 38 scraper shaft, 39 scraper, 310 adjusting cylinder;

[0036] 311 inverted L-shaped clamp arm, 312 top mounting plate, 313 guide seat, 314 movable seat, 315 material blocking cylinder, 316 mounting bracket, 317 guide rail, 318 material blocking block, 319 detection device, 320 fine-tuning motor, 321 fine-tuning worm, 322 fine-tuning worm wheel, 323 eccentric shaft, 324 bearing, 325 limit rod, 326 limit switch, 327 limit seat, 328 limit bolt; 329 material guide roller, 330 support plate, 331 adjustment mechanism, 332 scraper;

[0037] 51 driving motor, 52 material guide rack, 53 input material guide roller, 54 moving seat, 55 guide rail, 56 driving shaft, 57 driving roller, 58 adjusting hand wheel, 59 driving worm, 510 driving worm wheel, 511 driven roller, 512 supporting roller, 513 fixed guide roller, 514 roller rack, 515 water inlet adjusting roller; 516 adjusting worm wheel, 517 adjusting worm. DETAILED DESCRIPTION

[0038] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0039] like Figure 1-11As shown, a coating and shaping device for a highly breathable PTFE waterproof and breathable film includes a frame 1, a base fabric supply device 2 is provided on the frame 1, a coating device 3 for coating a liquid raw material on the base fabric is provided on the frame 1, a first coagulation tank 4 is provided below the coating device 3 on the frame 1, a cloth entry pool guide device 5 is provided at the outlet of the coating device 3 on the frame 1, the cloth entry pool guide device 5 includes a plurality of height-adjustable guide racks 52 and a water inlet roller guide mechanism arranged in parallel on the frame 1, an input guide roller 53 is provided on the guide rack, a plurality of cloth tensioning transition rollers 6 are provided in the first coagulation tank 4 along the feeding direction, and the connecting line of all the cloth tensioning transition rollers 6 is in a downwardly convex arc shape with an arc of 0.45. The first coagulation tank 4 is provided with a water outlet guide roller 7 at the end away from the water inlet roller; a plurality of heaters and a plurality of temperature sensors are provided in the first coagulation tank 4;

[0040] The frame 1 is provided with a tension control device 8 for controlling the tension of the cloth, and the tension control device 8 comprises a connecting seat arranged on the frame 1, a rotating seat is arranged on the connecting seat, a tension roller is rotatably arranged on the rotating seat, and a tension cylinder with an adjustable stroke for driving the rotating seat to rotate to tension the cloth is arranged on the connecting seat. A traction press car 9 for delivering the cloth is arranged on the frame 1 on the side where the tension control device 8 discharges the material.

[0041] The coating device 3 includes a coating frame 31 arranged on the frame 1, a coating roller 32 and a coating power device for driving the coating roller 32 to rotate are rotatably provided on the coating frame 31, a vertically upwardly arranged lifting cylinder 36 is hinged on the coating frame 31, a lifting frame 37 is hinged on the coating frame 31 above the material roller, and the end of the lifting frame 37 is hinged to the piston rod end of the lifting cylinder 36; a scraper shaft 38 is hinged on the lifting frame 37, a scraper 39 is provided on the scraper shaft 38, and the end of the scraper 39 is in an arc shape, and a stroke-adjustable regulating cylinder 310 is hinged on the lifting frame 37, and the piston rod end of the regulating cylinder 310 is hinged to the driving block connected to the scraper shaft 38;

[0042] A pair of inverted L-shaped clamp arms 311 are hinged on the coating frame 31, and a top mounting plate 312 is mounted on the two inverted L-shaped clamp arms 311. A pair of guide seats 313 arranged parallel to the material roller are arranged on the top mounting plate 312, and a movable seat 314 is slidably connected in the guide seat 313. Two back-to-back arranged material blocking cylinders 315 with adjustable strokes for driving the movable seat 314 are arranged on the top mounting plate 312. A detection device 319 for detecting the edge of the base fabric is arranged on the coating frame 31, and the detection signal of the detection device 319 controls the movement of the piston rod of the material blocking cylinder 315. A mounting bracket 316 is arranged on the movable seat 314, and a guide rail 317 arranged radially along the material roller is arranged on the mounting bracket 316, and a material pressing block with adjustable position for pressing the edge of the base fabric is arranged on the guide rail 317. A limiting device for limiting the position of the first scraper frame is disposed on the coating frame 31 ; the limiting device comprises a limiting seat 327 disposed on the coating frame 31 , and a limiting bolt 328 for pushing against the first scraper frame is disposed on the limiting seat 327 .

[0043] The coating frame 31 is provided with a fine-tuning drive mechanism for fine-tuning the position of the lifting frame 37. The fine-tuning drive mechanism includes a fine-tuning motor 320 vertically arranged on the coating frame 31. A fine-tuning worm 321 is provided on the output shaft of the fine-tuning motor 320. The fine-tuning worm 321 cooperates with a fine-tuning worm wheel 322 arranged on the coating frame 31. An eccentric shaft 323 is connected to the worm wheel shaft of the fine-tuning worm wheel 322. A bearing 324 is provided at the other end of the eccentric shaft 323. The outer ring of the bearing 324 is in free contact with the lower part of the lifting frame 37.

[0044] A guide roller 329 is provided on the coating frame 31 below the coating roller 32. A receiving tray 330 for receiving excess coating is also provided on the coating frame 31 below the coating roller 32, and an adjusting mechanism 331 for adjusting the upper and lower positions of the receiving tray 330 is provided on the coating frame 31. A scraper 332 for scraping excess coating from the coating roller 32 is provided on the coating frame 31. The scraper 332 is connected to a scraping worm wheel 33 provided on the coating frame 31, and a scraping worm 34 for driving the scraping worm wheel 33 to rotate is provided on the coating frame 31, and an adjusting hand wheel 35 is provided at the end of the scraping worm 34.

[0045] The water inlet roller guide mechanism includes a moving seat 54 movably arranged on the first coagulation tank 4 and a power mechanism driving the moving seat 54 to move along the length direction of the first coagulation tank 4. The power mechanism includes a pair of guide rails 55 arranged on the notch of the first coagulation tank 4. The moving seat 54 is rotatably provided with a driving shaft 56. The driving shaft 56 is sleeved with a pair of active rollers 57 matched with the guide rails 55. The moving seat 54 is provided with a driving motor 51. The output shaft of the driving motor 51 is connected with a driving worm 59. The driving shaft 56 is provided with a driving worm wheel 510 matched with the driving worm 59. The moving seat 54 is also provided with at least one pair of driven rollers 511 matched with the track. The moving seat 54 is also provided with a pair of supporting rollers 512 matched with the track. The movable seat 54 is provided with a fixed guide roller 513, a roller frame 514 is hingedly connected to the movable seat 54 and rotates around the axis of the fixed guide roller 513, a water inlet adjustment roller 515 is provided on the roller frame 514, and an adjustment limiting mechanism for adjusting the position of the roller frame 514 is provided on the movable seat 54. The adjustment limiting mechanism includes an adjustment worm wheel 516 arranged on the roller shaft of the fixed guide roller 513, an adjustment worm 517 is rotatably provided on the movable seat 54 and matched with the adjustment worm wheel 516, an adjustment hand wheel 58 is provided at the end of the adjustment worm 517, and the roller frame 514 is arranged on the roller shaft.

[0046] The above-mentioned embodiments are only illustrative of the principles and effects of the invention, as well as some embodiments of its application, and are not intended to limit the invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.

Claims

1. A coating and shaping device for a highly breathable PTFE waterproof and breathable film, comprising a frame, a base fabric supply device is provided on the frame, a coating device for coating a liquid raw material on the base fabric is provided on the frame, a first coagulation tank is provided below the coating device on the frame, and a cloth inlet guide device is provided at the outlet of the coating device on the frame, characterized in that: The material-entering-pool guiding device comprises a plurality of material-guiding frames with adjustable heights arranged in parallel on a frame and a water-entry roller guiding mechanism, wherein an input material-guiding roller is arranged on the material-guiding frame, a plurality of material-tensioning transition rollers are arranged in the first coagulation tank along the feeding direction, the connection line of all the material-tensioning transition rollers is in a downwardly convex arc shape, a water-outlet guiding roller is arranged at the end of the first coagulation tank away from the water-entry roller; a plurality of heaters and a plurality of temperature sensors are arranged in the first coagulation tank; a tension control device for controlling the tensioning force of the material is arranged on the frame, and a traction press for delivering the material is arranged on the discharge side of the tension control device on the frame.

2. The coating and shaping device for a highly breathable PTFE waterproof and breathable film according to claim 1, characterized in that: The coating device comprises a coating frame arranged on a frame, a coating roller and a coating power device for driving the coating roller to rotate are rotatably arranged on the coating frame, a lifting cylinder arranged vertically upward is hinged on the coating frame, a lifting frame is hinged on the coating frame above the material distribution roller, and the end of the lifting frame is hinged to the end of the piston rod of the lifting cylinder; a scraper shaft is hinged on the lifting frame, a scraper is arranged on the scraper shaft, and the end of the scraper is in an arc shape, and an adjusting cylinder with adjustable stroke is hinged on the lifting frame, and the piston rod end of the adjusting cylinder is hinged to the driving block connected to the scraper shaft; A pair of inverted L-shaped clamp arms are hinged on the coating frame, and a top mounting plate is mounted on the two inverted L-shaped clamp arms. A pair of guide seats arranged parallel to the cloth roller are provided on the top mounting plate, and a movable seat is slidably connected in the guide seat. Two back-to-back arranged material-blocking cylinders with adjustable stroke for driving the movable seat are provided on the top mounting plate, and a mounting bracket is provided on the movable seat, and a guide rail arranged radially along the cloth roller is provided on the mounting bracket, and a pressure block with adjustable position for pressing the edge of the base cloth is provided on the guide rail.

3. The coating and shaping device for a highly breathable PTFE waterproof and breathable film according to claim 2, characterized in that: The coating frame is provided with a limiting device for limiting the position of the first scraper frame; the limiting device comprises a limiting seat arranged on the coating frame, and the limiting seat is provided with a limiting bolt for pushing against the first scraper frame.

4. The coating and shaping device for a highly breathable PTFE waterproof and breathable film according to claim 2, characterized in that: The coating frame is provided with a detection device for detecting the edge of the base cloth, and the detection signal of the detection device controls the movement of the piston rod of the material blocking cylinder.

5. The coating and shaping device for a highly breathable PTFE waterproof and breathable film according to claim 2, characterized in that: The coating frame is provided with a fine-tuning drive mechanism for fine-tuning the position of the lifting frame, the fine-tuning drive mechanism includes a fine-tuning motor vertically arranged upward on the coating frame, a fine-tuning worm is provided on the output shaft of the fine-tuning motor, the fine-tuning worm cooperates with the fine-tuning worm wheel provided on the coating frame, an eccentric shaft is connected to the worm wheel shaft of the fine-tuning worm wheel, a bearing is provided at the other end of the eccentric shaft, and the outer ring of the bearing is in free contact with the lower part of the lifting frame.

6. The coating and shaping equipment for a highly breathable PTFE waterproof and breathable film according to claim 1, characterized in that: The connecting line of all the cloth tensioning transition rollers is in a downwardly convex arc shape with an arc angle in the range of 0.45-0.

55.

7. The coating and shaping equipment for a highly breathable PTFE waterproof and breathable film according to claim 1, characterized in that: The tension control device comprises a connecting seat arranged on a frame, a rotating seat is arranged on the connecting seat, a tensioning roller is rotatably arranged on the rotating seat, and a tensioning cylinder with an adjustable stroke for driving the rotating seat to rotate to tension the cloth is arranged on the connecting seat.

8. The coating and shaping device for a highly breathable PTFE waterproof and breathable film according to claim 1, characterized in that: The water inlet roller guide mechanism includes a moving seat movably arranged on the first coagulation tank and a power mechanism driving the moving seat to move along the length direction of the first coagulation tank, a fixed guide roller is arranged on the moving seat, a roller frame rotating around the axis of the fixed guide roller is hinged on the moving seat, a water inlet adjustment roller is arranged on the roller frame, and an adjustment and limiting mechanism for adjusting the position of the roller frame is arranged on the moving seat.

9. The coating and shaping device for a highly breathable PTFE waterproof and breathable film according to claim 8, characterized in that: The adjustment and limiting mechanism includes an adjustment worm wheel arranged on the roller shaft of the fixed guide roller, an adjustment worm screw matched with the adjustment worm wheel is rotatably arranged on the movable seat, an adjustment hand wheel is arranged at the end of the adjustment worm screw, and the roller frame is arranged on the roller shaft.

10. The coating and shaping device for a highly breathable PTFE waterproof and breathable film according to claim 8, characterized in that: The power mechanism includes a pair of guide rails arranged on the notch of the first solidification groove, a driving shaft is rotatably provided on the moving seat, a pair of active rollers matching with the guide rails are sleeved on the driving shaft, a driving motor is provided on the moving seat, a driving worm is connected to the output shaft of the driving motor, a driving worm wheel matching with the driving worm is provided on the driving shaft, and at least one pair of driven rollers matching with the track are also provided on the moving seat.

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