Preparation method of composite paper antibacterial film

Abstract

The invention relates to the technical field of composite paper antibacterial film preparation, and mainly relates to a composite paper antibacterial film preparation method, which comprises: S1, raw material preparation: preparing kraft paper, an antibacterial agent and a dispersant; s2, preparing an antibacterial layer; s3, compounding is carried out; s4, trimming is conducted, specifically, the composite film roll is conveyed to pass through trimming equipment, the composite film roll is cut into the specified size through the trimming equipment, and edge flaws are removed; in the preparation process of the composite paper antibacterial film, the adjusting part in the trimming equipment drives the two cutting parts to swing, so that the two cutting parts can conduct trimming treatment on paper in turn, meanwhile, the cleaning part is used for cleaning the lifted cutting parts, continuous trimming is avoided when glue is attached, the production efficiency is improved, and the production cost is reduced. Therefore, burrs and other flaws are generated during trimming, and the trimming quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of the preparation of double - paper antibacterial films, and specifically to a preparation method of double - paper antibacterial films. Background Art

[0002] Double - paper refers to a new type of paper formed by bonding two or more different - property papers or materials through a composite process (such as coating, lamination, hot - pressing, etc.), which has multifunctional characteristics. A double - paper antibacterial film is a multifunctional material formed by further compounding an antibacterial functional layer on the basis of double - paper. Its core is to endow the material with the ability to inhibit the growth of microorganisms by introducing antibacterial agents while retaining the original characteristics of double - paper.

[0003] Currently, the preparation steps of double - paper antibacterial films mainly include raw material selection, antibacterial layer preparation, compounding, antibacterial performance detection, and trimming and winding packaging. Among them, during the compounding process, it is easy for the glue to be unevenly applied, resulting in glue overflow after compounding. During the trimming process, glue is easily left on the trimming knife, causing defects and rough edges during cutting. The common treatment methods are to regularly clean the trimming knife or directly stop the machine to replace the trimming knife when the defect degree is too high, resulting in low trimming efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a preparation method of double - paper antibacterial films to solve the problems of poor trimming quality and low efficiency caused by the easy adhesion of glue on traditional trimming equipment as mentioned in the above - mentioned background art.

[0005] To achieve the above - mentioned purpose, the present invention provides the following technical solution: A preparation method of double - paper antibacterial films, including the following steps:

[0006] S1, Preparation of raw materials: Prepare kraft paper, antibacterial agent, and dispersant.

[0007] S2, Preparation of antibacterial layer: Add the antibacterial agent to the adhesive in proportion, and ensure uniform dispersion of particles through high - speed stirring or ultrasonic dispersion. Then mix the antibacterial masterbatch and the film raw materials in proportion, add them to the blown - film machine, and melt - co - extrude them into an antibacterial film, which is cooled and wound for standby.

[0008] S3, Compounding: Bond the paper base and the antibacterial layer together by hot - pressing.

[0009] S4, Trimming: Pass the composite film roll through the trimming equipment, and cut the composite film roll into a specified size by the trimming equipment to remove edge defects.

[0010] S5, Winding and packaging: Wind the trimmed composite film into a roll for storage and perform packaging treatment on it.

[0011] Preferably, the trimming equipment in the preparation equipment of the composite paper antibacterial film includes a bracket, a track plate is fixed on the bracket, and the track plate is provided with a track groove, a through opening is provided in the track plate, and an adjusting tube is inserted in the through opening, an adjusting frame is fixed to the outer end of the adjusting tube, and a cutting component connected to the track groove is installed on the adjusting frame, a driving part connected to the cutting component is installed on the track plate, an adjusting part for driving the adjusting tube to rotate is installed on the track plate, and a cleaning part for cleaning residual glue on the outside of the cutting component is also fixed on the track plate.

[0012] Preferably, the cutting component includes an I-shaped tube, a movable opening is opened in the adjustment frame, and the I-shaped tube is slidably inserted in the movable opening, one end of the I-shaped tube is fixed with a track rod plugged into the track groove, and the other end is rotatably mounted with a drive shaft, a transmission wheel matched with the drive part is fixed to the outside of the drive shaft, a cutting wheel is inserted into the outside of the drive shaft, and a tightening cap is threadedly sleeved on the outer end of the drive shaft.

[0013] Preferably, the driving part includes a driving rod slidingly passing through the adjusting tube, a driving wheel adapted to the transmission wheel is fixed to the outer end of the driving rod, a driving motor is fixed to the track plate through a motor frame, and the output end of the driving motor is fixed to the outer end of the driving rod through a coupling.

[0014] Preferably, the track groove consists of a fitting arc groove and two separation arc grooves, the two separation arc grooves are connected with both ends of the fitting arc groove, when the track rod is in the fitting arc groove, the transmission wheel is fitted with the driving wheel, when the track rod is in the separation arc groove, the transmission wheel is not fitted with the driving wheel.

[0015] Preferably, the adjustment part includes an adjustment motor fixed on a track plate, a screw is rotatably mounted on the track plate, and the output end of the adjustment motor is fixed to the outer end of the screw through a coupling, a moving block is threadedly sleeved on the outer side of the screw, and an adjustment frame is fixed to the outer side of the adjustment tube, the moving block is slidably inserted in the adjustment frame, and is fixed with a pin that is plugged into the inner groove of the adjustment frame.

[0016] Preferably, a compression spring is fixed in the movable opening, and an arc-shaped piece that fits with the outer side of the I-shaped tube is fixed to one end of the compression spring.

[0017] Preferably, the cleaning part includes an outer frame fixed on the track plate, a threaded rod is rotatably installed in the outer frame, and a sliding rod is also fixed in the outer frame, a cleaning motor is fixed to one side of the outer frame through a motor frame, and the output end of the cleaning motor is fixed to the outer end of the threaded rod through a coupling, a movable seat is threadedly sleeved on the outer side of the threaded rod and plugged into the sliding rod, an adjusting rod is fixed on the movable seat, cleaning parts are fixed at both ends of the outer frame, and linkage parts are arranged at both ends of the outer frame.

[0018] Preferably, the linkage member includes a linkage rod, a linkage wheel is rotatably installed at the bottom of the linkage rod, the linkage wheel is adapted to the driving wheel and the transmission wheel, a connecting frame is fixed to the top of the linkage rod, and one end of the connecting frame is slidably inserted with a connecting rod fixed to the inner wall of the outer frame. A tension spring fixed to the inner wall of the outer frame and the connecting frame is sleeved outside the connecting rod, and an inclined plate adapted to the adjusting rod is further fixed on the connecting frame.

[0019] Preferably, the cleaning member includes a support frame fixed to the outer frame, a sliding column is fixed to the bottom of the support frame, and cleaning pieces are slidably inserted at both ends of the sliding column. A contact end for contacting the outside of the cutting wheel is arranged between the two cleaning pieces, and mutually repulsive magnetic attraction blocks are fixed to the adjacent sides of the two cleaning pieces. Inclined surface grooves are formed on the outer sides of the two cleaning pieces, and an inserting column adapted to the inclined surface groove is fixed to the bottom of the inclined plate.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] In the process of preparing the duplex paper antibacterial film of the present invention, the adjusting part in the trimming device drives the two cutting parts to swing, so that the two cutting parts can take turns to trim the paper. At the same time, the cleaning part is used to clean the raised cutting part to avoid burrs and other defects during trimming caused by continued trimming when glue is attached, and improve the trimming quality.

[0022] In the present invention, the adjusting part drives the two cutting parts to trim alternately, so that when cleaning the residual glue on the cutting parts, there is no need to stop the machine, and the preparation efficiency of the duplex paper antibacterial film is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a schematic diagram of the overall structure of the present invention from another angle;

[0025] Figure 3 is a schematic diagram of the morphological conversion of the two cutting parts of the present invention;

[0026] Figure 4 is a front view of the internal structure of the outer frame of the present invention after partial sectioning;

[0027] Figure 5 is a schematic diagram of the positional relationship between the cutting part and the cleaning part of the present invention;

[0028] Figure 6 is a schematic diagram of the positional relationship between the two transmission wheels and the driving wheel of the present invention;

[0029] Figure 7 is a schematic diagram of the docking of the track rod and the track groove of the present invention;

[0030] Figure 8 For Figure 7 The enlarged view at position A in

[0031] Figure 9 The overall side view of the present invention;

[0032] Figure 10 The schematic diagram of the positional relationship between the cleaning part and the linkage part of the present invention.

[0033] In the figure: 1, bracket; 2, track plate; 3, track groove; 4, adjusting pipe; 5, adjusting frame; 6, cutting part; 7, driving part; 8, adjusting part; 9, cleaning part; 10, I-shaped pipe; 11, moving port; 12, track rod; 13, driving shaft; 14, transmission wheel; 15, cutting wheel; 16, tightening nut; 17, driving rod; 18, driving wheel; 19, driving motor; 20, fitting arc groove; 21, separating arc groove; 22, adjusting motor; 23, lead screw; 24, moving block; 25, adjusting frame; 26, extrusion spring; 27, arc-shaped piece; 28, outer frame; 29, threaded rod; 30, sliding rod; 31, cleaning motor; 32, moving seat; 33, adjusting rod; 34, cleaning part; 35, linkage part; 36, linkage rod; 37, linkage wheel; 38, connecting frame; 39, connecting rod; 40, tension spring; 41, inclined plate; 42, support frame; 43, sliding column; 44, cleaning piece; 45, inserting column. Specific embodiments

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Embodiment 1: Please refer to Figure 1 - Figure 4 , a preparation method of a duplex antibacterial film in the figure, including the following steps:

[0036] S1, preparation of raw materials, prepare kraft paper, antibacterial agent, and dispersant;

[0037] S2, preparation of the antibacterial layer, add the antibacterial agent to the adhesive in proportion, and ensure uniform dispersion of the particles through high-speed stirring or ultrasonic dispersion. Then, mix the antibacterial masterbatch and the film raw materials in proportion, add them to the blown film machine, and melt and co-extrude them into an antibacterial film, which is cooled and wound for standby;

[0038] S3, lamination, laminate the paper base and the antibacterial layer into one body by hot pressing;

[0039] S4, trimming, by conveying the composite film roll through the trimming equipment, cutting the composite film roll into a specified size by the trimming equipment, and removing edge defects;

[0040] S5, rolling and packaging, rolling the trimmed composite film into a roll and packaging it.

[0041] The trimming device in the preparation device of the composite paper antibacterial film includes a bracket 1, a track plate 2 is fixed on the bracket 1, a track groove 3 is opened on the track plate 2, a through opening is opened in the track plate 2, an adjusting tube 4 is inserted in the through opening, an adjusting frame 5 is fixed to the outer end of the adjusting tube 4, a cutting component 6 connected to the track groove 3 is installed on the adjusting frame 5, a driving part 7 connected to the cutting component 6 is installed on the track plate 2, an adjusting part 8 driving the adjusting tube 4 to rotate is installed on the track plate 2, and a cleaning part 9 for cleaning the residual glue on the outer side of the cutting component 6 is also fixed on the track plate 2;

[0042] In this solution, the bracket 1 is used to adjust the cutting component 6 to a suitable position to meet the requirements of trimming the antibacterial film on the paper. After that, the antibacterial film on the paper is rolled up by the traction component. During the rolling process, the cutting component 6 is used to cut the edge of the paper to achieve the trimming operation. During the trimming process, the adjustment part 8 is used to drive the adjustment frame 5 to rotate, so that the two cutting components 6 swing and cut the paper in turn, thereby facilitating the cleaning part 9 to clean the residual glue on the raised cutting component 6, realizing the cleaning of glue without stopping the machine, improving the preparation efficiency of the antibacterial film on the paper, and at the same time preventing the adhesion of glue from affecting the trimming quality.

[0043] For further information, see Figure 3 - Figure 8 The cutting component 6 includes an I-shaped tube 10, a moving opening 11 is opened in the adjusting frame 5, and the I-shaped tube 10 is slidably inserted in the moving opening 11. A track rod 12 plugged into the track groove 3 is fixed at one end of the I-shaped tube 10, and a driving shaft 13 is rotatably installed at the other end. A transmission wheel 14 adapted to the driving part 7 is fixed to the outside of the driving shaft 13, and a cutting wheel 15 is inserted into the outside of the driving shaft 13. A tightening cap 16 is threadedly sleeved on the outer end of the driving shaft 13. After the cutting wheel 15 is inserted into the outer end of the driving shaft 13, the cutting wheel 15 is stably inserted into the outer end of the driving shaft 13 by tightening the cap 16, and can rotate with the rotation of the driving shaft 13;

[0044] Also, see Figure 7 and Figure 9, the driving part 7 includes a driving rod 17 that slides through the adjusting tube 4. A driving wheel 18 adapted to the transmission wheel 14 is fixed to the outer end of the driving rod 17. A driving motor 19 is fixed to the track plate 2 through a motor bracket. The output end of the driving motor 19 is fixed to the outer end of the driving rod 17 through a coupling. The driving rod 17 is rotated by the driving motor 19, so that the driving wheel 18 rotates. The driving wheel 18 is used to drive the transmission wheel 14, thereby driving the corresponding rotation of the cutting wheel 15 and improving the trimming quality.

[0045] Further, referring to Figure 3 and Figure 9 , the adjusting part 8 includes an adjusting motor 22 fixed to the track plate 2. A lead screw 23 is rotatably installed on the track plate 2. The output end of the adjusting motor 22 is fixed to the outer end of the lead screw 23 through a coupling. A moving block 24 is threadedly sleeved on the outer side of the lead screw 23. An adjusting frame 25 is fixed to the outer side of the adjusting tube 4. The moving block 24 is slidably inserted into the adjusting frame 25, and a pin inserted into the inner groove of the adjusting frame 25 is fixed;

[0046] At the same time, referring to Figure 3 and Figure 6 , the track groove 3 is composed of a fitting arc groove 20 and two separating arc grooves 21. The two separating arc grooves 21 are communicated with both ends of the fitting arc groove 20. When the track rod 12 is in the fitting arc groove 20, the transmission wheel 14 is in contact with the driving wheel 18. When the track rod 12 is in the separating arc groove 21, the transmission wheel 14 is not in contact with the driving wheel 18;

[0047] In this solution, the adjusting motor 22 is used to drive the lead screw 23 to rotate, so that the moving block 24 can be driven to move up and down, driving the corresponding swing of the adjusting frame 25, making the adjusting tube 4 and the adjusting bracket 5 rotate correspondingly, thereby driving the two cutting components 6 to swing synchronously, so that the track rod 12 moves in the fitting arc groove 20 and the separating arc groove 21, so that the contact and separation state between the driving wheel 18 and the transmission wheel 14 can be controlled, so that the cutting wheel 15 that is not in the cutting state does not rotate, facilitating subsequent replacement and other operations.

[0048] Further, referring to Figure 4 - Figure 7 as well as Figure 9 and Figure 10 , the cleaning part 9 includes an outer frame 28 fixed to the track plate 2. A threaded rod 29 is rotatably installed in the outer frame 28. A slide rod 30 is also fixed in the outer frame 28. A cleaning motor 31 is fixed to one side of the outer frame 28 through a motor bracket. The output end of the cleaning motor 31 is fixed to the outer end of the threaded rod 29 through a coupling. A moving seat 32 that is inserted into the slide rod 30 is threadedly sleeved on the outer side of the threaded rod 29. An adjusting rod 33 is fixed to the moving seat 32. Cleaning parts 34 are fixed to both ends of the outer frame 28. Linkage parts 35 are arranged at both ends inside the outer frame 28;

[0049] Among them, the linkage member 35 includes a linkage rod 36. A linkage wheel 37 is rotatably installed at the bottom of the linkage rod 36. The linkage wheel 37 is adapted to the driving wheel 18 and the transmission wheel 14. A connecting frame 38 is fixed to the top of the linkage rod 36. One end of the connecting frame 38 is slidably inserted with a connecting rod 39 fixed to the inner wall of the outer frame 28. A tension spring 40 fixed to the inner wall of the outer frame 28 and the connecting frame 38 is sleeved outside the connecting rod 39. An inclined plate 41 adapted to the adjusting rod 33 is also fixed to the connecting frame 38.

[0050] Meanwhile, the cleaning member 34 includes a support frame 42 fixed to the outer frame 28. A sliding column 43 is fixed to the bottom of the support frame 42. Cleaning pieces 44 are slidably inserted at both ends of the sliding column 43. A contact end for contacting the outside of the cutting wheel 15 is arranged between the two cleaning pieces 44. Magnet attracting blocks that repel each other are fixed to the adjacent sides of the two cleaning pieces 44. Inclined grooves are formed on the outer sides of the two cleaning pieces 44. A plug post 45 adapted to the inclined groove is fixed to the bottom of the inclined plate 41.

[0051] In this solution, the principle of the cleaning part 9 for cleaning the residual glue on the outside of the cutting wheel 15:

[0052] First, the adjusting part 8 drives the adjusting pipe 4 to rotate, so that the adjusting frame 5 and the two cutting components 6 swing correspondingly, so that one of the cutting components 6 is lifted, and the cutting wheel 15 is moved between the two cleaning pieces 44. Then, the cleaning motor 31 drives the threaded rod 29 to rotate, so that the moving seat 32 moves correspondingly to the lifted cutting component 6. During the moving process, it will drive the adjusting rod 33 to contact the inclined plate 41 correspondingly, squeeze the inclined plate 41 to move downwards, so that the connecting frame 38, the linkage rod 36 and the linkage wheel 37 move downwards synchronously, and the linkage wheel 37 is as Figure 6 shown, fits with the driving wheel 18 and the transmission wheel 14, so that the transmission wheel 14 can drive the cutting wheel 15 to rotate. And during the downward movement of the inclined plate 41, it drives the plug post 45 to move downwards, so that the two cleaning pieces 44 fit on the outside of the cutting wheel 15, realizing the cleaning of the residual glue on the outside of the cutting wheel 15;

[0053] After the cleaning is completed, the movement of the moving seat 32 is used to make the adjusting rod 33 disengage from the inclined plate 41. Under the action of the tension spring 40, the connecting frame 38 and the linkage wheel 37 are driven to move upwards, and the transmission wheel 14 does not contact the driving wheel 18, so that the cutting wheel 15 stops rotating. At the same time, the two cleaning pieces 44 move outwards under the repulsive force of the magnet attracting blocks and separate from the cutting wheel 15.

[0054] In this solution, the specific operation to achieve high-quality trimming of the duplex antibacterial film includes the following steps:

[0055] The first step is that the personnel adjust and install the position of the bracket 1 according to the trimming distance.

[0056] In the second step, the adjustment part 8 drives the corresponding rotation of the adjustment pipe 4 and the adjustment frame 5, so that one of the cutting parts 6 contacts and cuts the multiple sheets of paper;

[0057] In the third step, after cutting a certain distance, the adjustment part 8 is used to make the two cutting parts 6 change positions;

[0058] In the fourth step, the moving seat 32 in the cleaning part 9 moves, the inclined plate 41 is moved downward, so that the two cleaning pieces 44 are attached to the cutting wheel 15, and the linkage wheel 37 is attached to the driving wheel 18 and the transmission wheel 14, and the residual glue on the outside of the cutting wheel 15 starts to be cleaned;

[0059] In the fifth step, the adjustment part 8 drives the adjustment frame 5 to rotate forward and backward regularly, so that the two cutting parts 6 take turns to change positions, and the third step and the fourth step are repeated.

[0060] In this solution, as Figure 3 shown, during the swinging process of the two cutting wheels 15, when the adjustment frame 5 rotates to the horizontal state, at this time the two cutting wheels 15 are in the horizontal state and both contact the multiple-sheet antibacterial film for cutting, so as to ensure that during the rotation of the adjustment frame 5, it always remains in a cutting state for the multiple-sheet antibacterial film, and avoid intermittent cutting of the edge of the multiple-sheet antibacterial film during the adjustment process.

[0061] Embodiment 2: Please refer to Figure 7 and Figure 8 , this embodiment further explains Embodiment 1, and the difference is that a spring is added in the moving port 11, so that the track rod 12 moves stably in the track groove 3 without shaking.

[0062] Specifically, an extrusion spring 26 is fixed in the moving port 11, and an arc-shaped piece 27 that fits the outside of the I-shaped pipe 10 is fixed at one end of the extrusion spring 26. It should be noted that when the track rod 12 moves along the fitting arc groove 20 and the separation arc groove 21, the extrusion spring 26 is used to squeeze the arc-shaped piece 27, so that the track rod 12 has higher stability during the movement process.

[0063] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to this process, method, article or device.

[0064] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A preparation method of a duplex paper antibacterial film, characterized in that, The following steps are involved: S1, preparation of raw materials, preparation of kraft paper, antibacterial agent, and dispersant; S2, preparation of antibacterial layer, adding antibacterial agent into adhesive in proportion, and dispersing by high-speed stirring or ultrasonic to ensure uniform dispersion of particles, then mixing antibacterial masterbatch with film raw material in proportion, adding into film blowing machine, melt co-extruding into antibacterial film, and then winding for use after cooling; S3, compounding, bonding the paper base and the antibacterial layer together by hot pressing; S4, trimming, by conveying the composite film roll through the trimming equipment, and then cutting the composite film roll into a specified size through the trimming equipment to remove edge defects; S5, rolling and packaging, rolling the trimmed composite film into a roll and packaging it.

2. The preparation method of a duplex paper antibacterial film according to claim 1, characterized in that: The trimming device in the preparation device of the paper-coated antibacterial film comprises a bracket (1), a track plate (2) is fixed on the bracket (1), and the track plate (2) is provided with a track groove (3), a through opening is provided in the track plate (2), and an adjusting tube (4) is inserted in the through opening, an adjusting frame (5) is fixed to the outer end of the adjusting tube (4), and a cutting component (6) connected to the track groove (3) is installed on the adjusting frame (5), a driving part (7) connected to the cutting component (6) is installed on the track plate (2), an adjusting part (8) for driving the adjusting tube (4) to rotate is installed on the track plate (2), and a cleaning part (9) for cleaning residual glue on the outer side of the cutting component (6) is also fixed on the track plate (2).

3. The preparation method of a double-layer antibacterial film according to claim 2, wherein: The cutting component (6) comprises an I-shaped tube (10), a movable opening (11) is provided in the adjusting frame (5), and the I-shaped tube (10) is slidably inserted in the movable opening (11), a track rod (12) plugged into the track groove (3) is fixed at one end of the I-shaped tube (10), and a driving shaft (13) is rotatably mounted at the other end, a transmission wheel (14) matched with the driving part (7) is fixed on the outside of the driving shaft (13), a cutting wheel (15) is inserted on the outside of the driving shaft (13), and a tightening cap (16) is threadedly sleeved on the outer end of the driving shaft (13).

4. The preparation method of a double-paper antibacterial film according to claim 3, characterized in that: The driving part (7) comprises a driving rod (17) which slides through the adjusting tube (4); a driving wheel (18) which matches the transmission wheel (14) is fixed to the outer end of the driving rod (17); a driving motor (19) is fixed to the track plate (2) via a motor frame, and an output end of the driving motor (19) is fixed to the outer end of the driving rod (17) via a coupling.

5. The preparation method of a double-ply antibacterial film according to claim 4, characterized in that: The track groove (3) consists of a fitting arc groove (20) and two separation arc grooves (21). The two separation arc grooves (21) are connected to the two ends of the fitting arc groove (20). When the track rod (12) is in the fitting arc groove (20), the transmission wheel (14) and the driving wheel (18) are in contact. When the track rod (12) is in the separation arc groove (21), the transmission wheel (14) and the driving wheel (18) are not in contact.

6. The preparation method of a double-layer antibacterial film according to claim 2, characterized in that: The adjusting part (8) includes an adjusting motor (22) fixed on the track slab (2). A lead screw (23) is rotatably installed on the track slab (2), and the output end of the adjusting motor (22) is fixed to the outer end of the lead screw (23) through a coupling. A moving block (24) is threadedly sleeved on the outer side of the lead screw (23). An adjusting frame (25) is fixed on the outer side of the adjusting pipe (4). The moving block (24) is slidably inserted into the adjusting frame (25), and a latch inserted into the inner groove of the adjusting frame (25) is fixed on the moving block (24).

7. The preparation method of a double-layer antibacterial film according to claim 3, characterized in that: An extrusion spring (26) is fixed in the moving port (11), and an arc-shaped piece (27) attached to the outer side of the I-shaped pipe (10) is fixed at one end of the extrusion spring (26).

8. The preparation method of a duplex paper antibacterial film according to claim 2, characterized in that: The cleaning part (9) includes an outer frame (28) fixed on the track slab (2). A threaded rod (29) is rotatably installed in the outer frame (28), and a sliding rod (30) is also fixed in the outer frame (28). A cleaning motor (31) is fixed on one side of the outer frame (28) through a motor bracket, and the output end of the cleaning motor (31) is fixed to the outer end of the threaded rod (29) through a coupling. A moving seat (32) inserted into the sliding rod (30) is threadedly sleeved on the outer side of the threaded rod (29). An adjusting rod (33) is fixed on the moving seat (32). Cleaning members (34) are fixed at both ends of the outer frame (28), and a linkage member (35) is arranged inside both ends of the outer frame (28).

9. The preparation method of a double-layer antibacterial film according to claim 8, characterized in that: The linkage member (35) includes a linkage rod (36). A linkage wheel (37) is rotatably installed at the bottom of the linkage rod (36). The linkage wheel (37) is adapted to the driving wheel (18) and the transmission wheel (14). A connecting frame (38) is fixed at the top of the linkage rod (36). One end of the connecting frame (38) is slidably inserted with a connecting rod (39) fixed to the inner wall of the outer frame (28). A tension spring (40) fixed to the inner wall of the outer frame (28) and the connecting frame (38) is sleeved on the outer side of the connecting rod (39). An inclined plate (41) adapted to the adjusting rod (33) is also fixed on the connecting frame (38).

10. The preparation method of a double-layer antibacterial film according to claim 9, characterized in that: The cleaning member (34) includes a support frame (42) fixed to the outer frame (28). A sliding column (43) is fixed at the bottom of the support frame (42). Cleaning pieces (44) are slidably inserted at both ends of the sliding column (43). A contact end for contacting the outer side of the cutting wheel (15) is arranged between the two cleaning pieces (44). Magnet attracting blocks that repel each other are fixed on the adjacent sides of the two cleaning pieces (44). Inclined surface grooves are formed on the outer sides of the two cleaning pieces (44). A plug post (45) adapted to the inclined surface groove is fixed at the bottom of the inclined plate (41).

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