Preparation method of multifunctional light and thin flexible film and multifunctional light and thin flexible film

Abstract

The invention belongs to the technical field of preparation of display screen films, and provides a preparation method of a multifunctional light and thin flexible film, and the preparation method comprises the following steps: S1, preparing an electromagnetic shielding layer on one surface of a PET (Polyethylene Terephthalate) base layer; s2, turning over the PET base layer and the shielding layer on the PET base layer; s3, coating the other surface of the PET base layer with a heating layer; and S4, preparing a bus bar on the surface, far away from the PET base layer, of the heating layer. The invention further provides a multifunctional light and thin flexible film which comprises a PET base layer, a shielding layer, a heating layer and a bus bar, the shielding layer is fixedly arranged on one face of the PET base layer, and the shielding layer is in a grid shape; the heating layer is fixedly arranged on the other surface of the PET base layer; the two bus bars are fixedly arranged on the face, away from the PET base layer, of the heating layer. According to the technical scheme, the problem that an existing multifunctional film is large in thickness and weight is solved.

Description

Technical Field

[0001] The invention relates to the preparation of a display screen film, in particular to a preparation method of a multifunctional light, thin and flexible film and the multifunctional light, thin and flexible film. Background Art

[0002] With the widespread use of various electronic devices, the electromagnetic environment has become increasingly complex, and the anti-electromagnetic interference performance between devices has become an important technical requirement. Conventional light-transmitting shielding materials use shielding wire mesh as the main shielding layer. The mesh number and wire diameter of the wire mesh affect the overall light transmittance, and it is difficult to meet the high index requirements in the field of EMC technology. In addition, the conventional structure using shielding grids generally uses two glass sandwich methods, and the shielding grid is melted with resin film in the middle of the glass to form an integral product, and its thickness and weight are generally large.

[0003] According to actual use needs, the display terminal, especially the LCD screen, has higher and higher resolution performance indicators. In addition to having the light transmission and shielding function, the LCD screen also needs to be electrically heated in ultra-low temperature environments. On the one hand, it is to prevent frost and defog in low temperature environments, and on the other hand, it is to maintain a certain temperature environment for the LCD screen to avoid abnormal conditions such as the liquid crystal inside not flipping or flipping slowly, display sluggishness, display tailing, or even black screen failure. In order to achieve the electric heating function, the conventional structure in the industry is to use an ITO coated glass layer, match various ITO surface resistors and loading power supplies, set two bus bars according to the actual functional rate requirements, and load the voltage to electrically heat the LCD screen at low temperatures. At present, the conventional structure of electric heating is generally to prepare a laminated electric heating glass separately, and superimpose it on the LCD screen together with the shielding layer. The total thickness and overall weight are obviously too large to meet practical applications, especially in the application of military equipment that requires the whole machine to be light and thin. Summary of the invention

[0004] One of the main purposes of the present invention is to provide a method for preparing a multifunctional, thin and flexible film to solve the problem of large thickness and weight of the existing multifunctional film.

[0005] The second main purpose of the present invention is to provide a multifunctional thin and flexible film to solve the problem of large thickness and weight of the existing multifunctional films.

[0006] In order to solve the above technical problems, one of the purposes of the present invention is to adopt a technical solution that: A method for preparing a multifunctional thin and flexible film comprises the following steps: S1. preparing an electromagnetic shielding layer on one surface of the PET base layer; S2, turn over the PET base layer and the shielding layer thereon; S3, coating a heating layer on the other side of the PET base layer; S4. Prepare a bus bar on the surface of the heating layer away from the PET base layer.

[0007] As a further technical solution, step S1 includes: S11, applying primer on one side of the PET base layer; S12, embossing a grid groove on the base glue by using a template; S13, UV curing the printed grid groove bottom glue; S14, filling nano conductive ink into the grid groove; S15, perform UV curing again.

[0008] As a further technical solution, in step S2, the PET base layer and the shielding layer thereon are turned over by a turning device, and the turning device comprises: frame; A rotating seat, both ends of which are rotatably arranged on the frame; Sliding clamps, there are two sets of sliding clamps, which are respectively arranged on the two opposite sides of the rotating seat, each set The sliding clamps include an upper clamp and a lower clamp arranged from top to bottom. The upper clamp and the lower clamp have the same structure and include a slide plate and a plurality of clamp rods. The slide plate is arranged on the side of the rotating seat in a vertical sliding manner. The plurality of clamp rods are arranged in a horizontal direction and one end of each clamp rod is fixed on the slide plate. Gaps are provided between the plurality of clamp rods. An auxiliary material feeding and conveying assembly is located on one side of the rotating seat and is interspersed in the gaps between the plurality of clamping rods; The auxiliary material unloading and conveying assembly is located on the other side of the rotating seat and is inserted in the gaps between the plurality of clamping rods.

[0009] As a further technical solution, the two sets of sliding clamps are linked by a transmission assembly, and the transmission assembly includes: A driving gear, the driving gear is rotatably arranged in a rotating seat; A driven gear, which is rotatably disposed in a rotating seat and meshes with the driving gear; Racks: There are two racks, which are respectively arranged on both sides of the driven gear and mesh with the driving gear; There are two connecting plates, both of which are vertically slidably arranged in the rotating seat and are respectively located on both sides of the driven gear, and one end of the two connecting plates is fixedly connected to the two racks respectively; There are four connecting blocks, and one end of each connecting block is fixedly connected to the upper and lower sides of the two connecting plates. Two through holes are provided on the two side walls of the rotating seat. The four connecting blocks are slidably arranged in each through hole, and the other end extends out of the through hole and is fixedly connected to each slide plate.

[0010] As a further technical solution, the two groups of sliding clamps are respectively a first sliding clamp and a second sliding clamp, the first sliding clamp is located between the auxiliary loading and conveying assembly and the rotating seat, the second sliding clamp is located between the auxiliary unloading and conveying assembly and the rotating seat, the first sliding clamp includes a first upper clamp and a first lower clamp, the second sliding clamp includes a second upper clamp and a second lower clamp, wherein the connecting block on the upper side of one connecting plate is fixedly connected to the slide of the first upper clamp, and the connecting block on the lower side is fixedly connected to the slide of the second lower clamp, the connecting block on the side of the other connecting plate is fixedly connected to the slide of the second upper clamp, and the connecting block on the lower side is fixedly connected to the slide of the first lower clamp.

[0011] As a further technical solution, the auxiliary loading conveying assembly and the auxiliary unloading conveying assembly have the same structure and both include: Active roller, both ends of which are rotatably arranged on the frame and located at one end of the clamping rod away from the rotating seat; A driven wheel, wherein the driven wheels are multiple, arranged in sequence in the gaps between the multiple clamping rods, and all are rotatably arranged on the frame; Conveyor belts, there are multiple conveyor belts, and they correspond to the driven wheels one by one, and the two ends of each conveyor belt are respectively driven and sleeved on the driving roller and the driven wheel.

[0012] As a further technical solution, a loading conveying assembly is provided at one end of the auxiliary loading conveying assembly away from the rotating seat, and a unloading conveying assembly is provided at one end of the auxiliary unloading conveying assembly away from the rotating seat, and a pressure roller is provided on the top of the unloading conveying assembly.

[0013] As a further technical solution, in step S3, the heating layer is a transparent nano alloy material, and the thickness of the heating layer is 2-5 μm.

[0014] As a further technical solution, the thickness of the PET base layer is 0.075-0.188 mm.

[0015] The technical solution adopted for the second purpose of the present invention is: A multifunctional thin and flexible film, comprising: PET base layer; The shielding layer is fixedly arranged on one side of the PET base layer, and the shielding layer is in a grid shape; A heating layer, the heating layer is fixedly arranged on the other side of the PET base layer; There are two bus bars, both of which are fixedly arranged on the side of the heating layer away from the PET base layer.

[0016] The beneficial effects of the present invention are: The present invention has a simple structure. By preparing a shielding layer and a heating layer on both sides of the PET base layer, the composite shielding function and the heating function are achieved. The overall light transmittance is greater than 80%, the shielding effectiveness is 60 decibels or above, and it is light, thin and flexible. It can be directly fully bonded to the liquid crystal screen, greatly reducing the overall weight of the film and the display component. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the turning device of the present invention; Figure 2 It is a schematic diagram of the top view of the turning device of the present invention; Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure in the AA direction; Figure 4 It is a structural schematic diagram of the motion state of each upper clamping member and the lower clamping member of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of a multifunctional, thin and flexible membrane; Figure 6 This is a schematic diagram of the upward-looking structure of the multifunctional, thin and flexible membrane.

[0019] Description of Reference Numerals 100. Turning device; 1. Feeding conveying assembly; 2. Frame; 3. Rotating seat; 4. First sliding clamp; 41. First upper clamp; 42. First lower clamp; 5. Second sliding clamp; 51. Second upper clamp; 52. Second lower clamp; 6. Auxiliary feeding conveying assembly; 7. Auxiliary unloading conveying assembly; 8. Unloading conveying assembly; 9. Slide plate; 10. Clamping rod; 11. Rubber sleeve; 12. Active roller; 13 , driven wheel; 14, conveyor belt; 15, transmission assembly; 151, driving gear; 152, driven gear; 153, connecting plate; 154, connecting block; 155, motor; 156, rack; 16, frame; 17, conveyor belt; 18, pressure roller; 19, adjustment assembly; 191, connecting rod; 192, tension spring; 200, PET base layer; 300, shielding layer; 400, heating layer; 500, bus bar. DETAILED DESCRIPTION

[0020] The technical scheme in the embodiment of the present invention is described clearly and completely below in conjunction with the accompanying drawings in the embodiment of the present invention. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0021] The present invention provides a method for preparing a multifunctional thin and flexible film, comprising the following steps: S1. Prepare the electromagnetic shielding layer 300 on one surface of the PET base layer 200 by using nanoimprint technology, wherein the thickness of the PET base layer 200 is 0.075-0.188 mm, and preferably, the thickness of the PET base layer 200 is 0.125 mm.

[0022] Specifically, step S1 includes: S11, applying primer on one surface of the PET base layer 200; S12, embossing a grid groove on the base glue by using a template, wherein the template is in a grid shape, and the height-width-depth ratio of the grid is about 3:1; S13, UV curing the printed grid groove base glue to make the base glue cure quickly and enhance the stability of the grid groove; S14, filling the grid groove with nano-conductive ink, wherein the line width of the grid line after filling is controlled to be 4-5 μm, and the line depth is in the range of 10-15 μm; S15, UV curing is performed again, and the light transmittance of the grid lines of the shielding layer 300 after curing is greater than 85%, and the shielding effectiveness reaches 60 decibels (dB) or more in the frequency band range of 30Mhz-1Ghz.

[0023] S2, turning over the PET base layer 200 and the shielding layer 300 thereon by the turning device 100, specifically, as follows Figure 1-Figure 4 As shown, the flipping device 100 mainly includes a loading and conveying assembly 1, a frame 2, a rotating seat 3, two sets of sliding clamps, an auxiliary loading and conveying assembly 6, an auxiliary unloading and conveying assembly 7 and an unloading and conveying assembly 8, wherein the loading and conveying assembly 1, the auxiliary loading and conveying assembly 6, the sliding clamp, the rotating seat 3, the sliding clamp, the auxiliary unloading and conveying assembly 7 and the unloading and conveying assembly 8 are arranged in sequence along the conveying direction of the PET base layer 200.

[0024] The frame 2 is arranged between the loading conveying assembly 1 and the unloading conveying assembly 8, the two ends of the rotating seat 3 are rotatably arranged in the middle of the frame 2, and the two sets of sliding clamps are respectively arranged on the opposite side surfaces of the rotating seat 3. Specifically, the two sets of sliding clamps are respectively a first sliding clamp 4 and a second sliding clamp 5. Figure 1-Figure 2As shown, in this embodiment, the first sliding clamp 4 is located on the side of the rotating seat 3 close to the loading and conveying assembly 1, and the second sliding clamp 5 is located on the other opposite side. The first sliding clamp 4 includes a first upper clamp 41 and a first lower clamp 42, and the second sliding clamp 5 includes a second upper clamp 51 and a second lower clamp 52. The first upper clamp 41, the second upper clamp 51, the first lower clamp 42 and the second lower clamp 52 have the same structure, and all include a slide plate 9 and a plurality of clamping rods 10. The slide plate 9 is vertically slidably arranged on the side of the rotating seat 3, and the plurality of clamping rods 10 are arranged in a horizontal arrangement, and one end of each clamp is fixedly arranged on the slide plate 9, and gaps are provided between the plurality of clamping rods 10.

[0025] In this embodiment, a rubber sleeve 11 is provided on the outer side of each clamping rod 10. On the one hand, it can prevent the clamping rod 10 from directly contacting the PET base layer 200 and the shielding layer 300 and causing damage to them. On the other hand, since the rubber sleeve 11 is made of soft material, when the clamping rods 10 on both sides simultaneously press the PET base layer 200 and the shielding layer 300, the setting of the rubber sleeve 11 can increase the contact area with the PET base layer 200 and the shielding layer 300, thereby enhancing the friction force, ensuring the clamping effect, and avoiding sliding.

[0026] The auxiliary loading and conveying assembly 6 and the auxiliary unloading and conveying assembly 7 have the same structure, both of which include an active roller 12, a driven wheel 13 and a conveyor belt 14. Both ends of the active roller 12 are rotatably set on the frame 2 and are located at the end of the clamping rod 10 away from the rotating seat 3, close to the unloading end of the loading and conveying assembly 1 or the loading end of the unloading and conveying assembly 8. There are multiple driven wheels 13, which are arranged in sequence in the gap between the multiple clamping rods 10 and are rotatably set on the frame 2. There are multiple conveyor belts 14, which correspond one to one with the driven wheels 13. Both ends of each conveyor belt 14 are respectively driven and sleeved on the active roller 12 and the driven wheel 13, so that each conveyor belt 14 is set in the gap between adjacent clamping rods 10, so that the rotating seat 3 can drive each clamping rod 10 to rotate smoothly and avoid obstruction caused by the conveyor belt 14.

[0027] The two sets of sliding clamps are linked by a transmission assembly 15, which includes a driving gear 151, a driven gear 152, a rack 156, a connecting plate 153 and a connecting block 154. The driving gear 151 is rotatably arranged in the rotating seat 3 by a motor 155, and the motor 155 is fixedly arranged on the outer wall of the rotating seat 3. The driven gear 152 is rotatably arranged in the rotating seat 3 and meshes with the driving gear 151. There are two racks 156, which are respectively arranged on both sides of the driven gear 152 and are both engaged with the driving gear 151. 51 meshing, there are two connecting plates 153, both of which are vertically slidably arranged in the rotating seat 3 and are respectively located on both sides of the driven gear 152, one end of the two connecting plates 153 is respectively fixedly connected to the two racks 156, there are four connecting blocks 154, and one end is respectively fixedly connected to the upper and lower side surfaces of the two connecting plates 153, two through holes are provided on both side walls of the rotating seat 3, the four connecting blocks 154 are respectively slidably arranged in each through hole, and the other end extends out of the through hole and is respectively fixedly connected to each slide plate 9, as shown in FIG. Figure 4 As shown, the connecting block 154 on the upper side of one connecting plate 153 is fixedly connected to the slide plate 9 of the first upper clamping member 41, and the connecting block 154 on the lower side is fixedly connected to the slide plate 9 of the second lower clamping member 52; the connecting block 154 on the upper side of the other connecting plate 153 is fixedly connected to the slide plate 9 of the second upper clamping member 51, and the connecting block 154 on the lower side is fixedly connected to the slide plate 9 of the first lower clamping member 42.

[0028] The structure of the loading conveying assembly 1 and the unloading conveying assembly 8 is the same, both of which include a frame 16 and a conveyor belt 17 arranged on the frame 16, wherein the conveyor belt 17 is a vacuum adsorption conveyor belt, which is conducive to the smooth transportation of the film, which is a prior art and is not described in detail here. A pressure roller 18 is arranged on the top of the unloading conveying assembly 8, and the turned-over PET base layer 200 and the shielding layer 300 thereon pass between the conveyor belt 17 and the pressure roller 18 of the unloading conveying assembly 8, which is conducive to smoothing the turned-over PET base layer 200 and the shielding layer 300 thereon during backward transportation, so that they can better fit on the conveyor belt 17 of the unloading conveying assembly 8, and ensure the smooth progress of the subsequent preparation of the heating layer 400.

[0029] The pressure roller 18 is pressed on the top of the conveyor belt 17 of the unloading conveying assembly 8 through the adjusting assembly 19. The adjusting assembly 19 includes a connecting rod 191 and a tension spring 192. The connecting rod 191 and the tension spring 192 are both in two groups, which are symmetrically arranged on both sides of the pressure roller 18, wherein the two ends of the pressure roller 18 are respectively rotatably arranged at one end of the two connecting rods 191, and the other end of the connecting rod 191 is rotatably connected to the frame 16 of the unloading conveying assembly 8, and the end of the connecting rod 191 close to the pressure roller 18 is rotatably connected to the upper end of the tension spring 192, and the lower end of the tension spring 192 is rotatably connected to the frame 16 of the unloading conveying assembly 8. The setting of the adjustment component 19 can make the pressure roller 18 always press the top of the conveyor belt 17 set on the unloading conveying component 8 under the tension of the tension spring 192, thereby ensuring the smoothing effect of the pressure roller 18 on the PET base layer 200 and the shielding layer 300 thereon. At the same time, it can also be suitable for the passage of PET base layers 200 and the shielding layers 300 thereon of different thicknesses, and is highly practical.

[0030] The specific operation steps of the turning device 100 in this embodiment are as follows: when the shielding layer 300 is prepared, the PET base layer 200 with the shielding layer 300 on one side is conveyed backwards through the feeding conveying assembly 1, and enters the conveyor belt 14 from the side of the active roller 12, and the conveyor belt 14 continuously conveys the PET base layer 200 with the shielding layer 300 backwards. When the PET base layer 200 is conveyed between the first upper clamping member 41 and the first lower clamping member 42, the conveyor belt 14 stops conveying, and at the same time, the motor 155 is started to drive the driving gear 151 to rotate, and the driving gear 151 drives the driven gear 152 to rotate, and the driven gear 15 2 drives the racks 156 on both sides to slide in opposite directions, so that the two connecting plates 153 and the connecting blocks 154 thereon slide in the opposite direction with the racks 156, driving the first upper clamping member 41 and the second lower clamping member 52 to slide downward, and at the same time, the first lower clamping member 42 and the second upper clamping member 51 slide upward, so that the first upper clamping member 41 and the first lower clamping member 42 simultaneously approach the PET base layer 200 with the shielding layer 300 and clamp it, and then the rotating seat 3 rotates 180 degrees, the first sliding clamping member 4 is rotated to the position of the second sliding clamping member 5, and the second sliding clamping member 5 is rotated to the position of the first sliding clamping member 4; Then the motor 155 rotates in the opposite direction, driving the driving gear 151 to rotate in the opposite direction, and the driving gear 151 drives the driven gear 152 to rotate in the opposite direction, and the driven gear 152 drives the racks 156 on both sides to slide in the opposite directions, so that the two connecting plates 153 and the connecting blocks 154 thereon slide in the opposite direction with the racks 156, driving the first upper clamping member 41 and the second lower clamping member 52 to slide upward, and at the same time, the first lower clamping member 42 and the second upper clamping member 51 slide downward, so that the first upper clamping member 41 and the first lower clamping member 42 simultaneously move away from the direction of the PET base layer 200 with the shielding layer 300, release the clamping of the PET base layer 200 with the shielding layer 300, and transport it to the unloading conveying assembly 8 through the conveyor belt 14 of the auxiliary unloading conveying assembly 7 for backward transportation. When passing under the pressure roller 18, the pressure roller 18 smoothes the PET base layer 200 with the shielding layer 300, and then continues to transport it backward and carry out the subsequent heating layer 400 preparation process. While the first upper clamping member 41 and the first lower clamping member 42 simultaneously move away from the PET base layer 200 with the shielding layer 300, the second upper clamping member 51 and the second lower clamping member 52 slide towards each other, and clamp the next PET base layer 200 with the shielding layer 300 on the conveyor belt 14 that is transported from the loading and conveying assembly 1 to the auxiliary loading and conveying assembly 6, and repeat the above steps to achieve the purpose of simultaneous loading and unloading of materials by two sets of sliding clamps, thereby improving the turning efficiency.

[0031] S3. A heating layer 400 is coated on the other side of the PET base layer 200. The heating layer 400 is made of a transparent nano alloy material. The thickness of the heating layer 400 is 2-5 μm. The surface resistance value is controlled by the coating thickness. Different thicknesses correspond to different surface resistances. The thicker the film layer, the smaller the surface resistance value but the transmittance is reduced. The coating thickness, surface resistance and transmittance are set before preparation according to product technical requirements. The heating layer 400 needs to be UV cured after coating. The surface resistance of the cured heating layer 400 is generally controlled at 8-20 ohms.

[0032] S4, prepare a bus bar 500 on the surface of the heating layer 400 away from the PET base layer 200. Specifically, prepare two conductive lead wires loaded with power on the long side or short side of the heating layer 400, the bus bar 500 can be contacted with a conductive silver paste and led out with a copper tape or a wire, and the required power is obtained after the voltage is loaded to achieve electric auxiliary heating.

[0033] In this embodiment, the film prepared by the above steps has the characteristics of being ultra-thin and flexible, and has an overall light transmittance greater than 80%, and has composite shielding and heating functions.

[0034] like Figure 6As shown, the present invention also proposes a multifunctional thin and flexible film, including a PET base layer 200, a shielding layer 300, a heating layer 400 and two bus bars 500, the thickness of the PET base layer 200 is 0.075-0.188 mm, preferably, the thickness of the PET base layer 200 is 0.125 mm, the PET base layer 200 is a high light transmittance film, and the light transmittance is greater than 90%; the shielding layer 300 is fixedly arranged on one side of the PET base layer 200, the shielding layer 300 is a grid-like, and the wire diameter width of the grid is The thickness of the heating layer 400 is controlled at 4-5μm, the line depth is 10-15μm, the transmittance of the shielding layer 300 is greater than 85%, and the shielding effectiveness reaches 60 decibels (dB) and above in the frequency band of 30Mhz-1Ghz; the heating layer 400 is fixedly arranged on the other side of the PET base layer 200, and the heating layer 400 is a transparent nano alloy material with a thickness of 2-5μm. The two bus bars 500 are fixedly arranged on the side of the heating layer 400 away from the PET base layer 200, and the width of the bus bar 500 is about 2mm.

[0035] The multifunctional, thin and flexible film in this embodiment can complete the combination of the shielding layer 300 and the heating layer 400, and has both shielding and heating functions. The overall weight is light and the thickness is small. It can be directly attached to the LCD screen, which is thin and practical.

[0036] The above description is only a preferred embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A method for preparing a multifunctional, thin and flexible film, characterized in that: The following steps are involved: S1. preparing an electromagnetic shielding layer on one surface of the PET base layer; S2, turn over the PET base layer and the shielding layer thereon; S3, coating a heating layer on the other side of the PET base layer; S4. Prepare a bus bar on the surface of the heating layer away from the PET base layer.

2. The method for preparing a multifunctional thin and flexible film according to claim 1, characterized in that: Step S1 includes: S11, applying primer on one side of the PET base layer; S12, embossing a grid groove on the base glue by using a template; S13, UV curing the printed grid groove bottom glue; S14, filling nano conductive ink into the grid groove; S15, perform UV curing again.

3. The method for preparing a multifunctional thin and flexible film according to claim 1, characterized in that: In step S2, the PET base layer and the shielding layer thereon are turned over by a turning device, and the turning device comprises: frame; A rotating seat, both ends of which are rotatably arranged on the frame; Sliding clamps, the sliding clamps are divided into two groups, which are respectively arranged on the two opposite sides of the rotating seat, each group of sliding clamps includes an upper clamping member and a lower clamping member arranged from top to bottom, the upper clamping member and the lower clamping member have the same structure, and both include a slide plate and a plurality of clamping rods, the slide plate is arranged on the side of the rotating seat along the vertical sliding, and the plurality of clamping rods are arranged in a horizontal direction, and one end of each of the plurality of clamping rods is fixedly arranged on the slide plate, and a gap is arranged between the plurality of clamping rods; An auxiliary material feeding and conveying assembly is located on one side of the rotating seat and is interspersed in the gaps between the plurality of clamping rods; The auxiliary material unloading and conveying assembly is located on the other side of the rotating seat and is inserted in the gaps between the plurality of clamping rods.

4. The method for preparing a multifunctional thin and flexible film according to claim 3, characterized in that: The two sets of sliding clamps are linked by a transmission assembly, which includes: A driving gear, the driving gear is rotatably arranged in a rotating seat; A driven gear, which is rotatably disposed in a rotating seat and meshes with the driving gear; Racks: There are two racks, which are respectively arranged on both sides of the driven gear and mesh with the driving gear; There are two connecting plates, both of which are vertically slidably arranged in the rotating seat and are respectively located on both sides of the driven gear, and one end of the two connecting plates is fixedly connected to the two racks respectively; There are four connecting blocks, and one end of each connecting block is fixedly connected to the upper and lower sides of the two connecting plates. Two through holes are provided on the two side walls of the rotating seat. The four connecting blocks are slidably arranged in each through hole, and the other end extends out of the through hole and is fixedly connected to each slide plate.

5. The method for preparing a multifunctional thin and flexible film according to claim 4, characterized in that: The two groups of sliding clamps are respectively a first sliding clamp and a second sliding clamp, the first sliding clamp includes a first upper clamp and a first lower clamp, the second sliding clamp includes a second upper clamp and a second lower clamp, wherein the connecting block on the upper side of one connecting plate is fixedly connected to the slide of the first upper clamp, and the connecting block on the lower side is fixedly connected to the slide of the second lower clamp, and the connecting block on the side of the other connecting plate is fixedly connected to the slide of the second upper clamp, and the connecting block on the lower side is fixedly connected to the slide of the first lower clamp.

6. The method for preparing a multifunctional thin and flexible film according to claim 3, characterized in that: The auxiliary loading conveying assembly and the auxiliary unloading conveying assembly have the same structure, and both include: Active roller, both ends of which are rotatably arranged on the frame and located at one end of the clamping rod away from the rotating seat; A driven wheel, wherein the driven wheels are multiple, arranged in sequence in the gaps between the multiple clamping rods, and all are rotatably arranged on the frame; Conveyor belts, there are multiple conveyor belts, and they correspond to the driven wheels one by one, and the two ends of each conveyor belt are respectively driven and sleeved on the driving roller and the driven wheel.

7. The method for preparing a multifunctional thin and flexible film according to claim 3, characterized in that: A loading conveying assembly is arranged at one end of the auxiliary loading conveying assembly away from the rotating seat, a unloading conveying assembly is arranged at one end of the auxiliary unloading conveying assembly away from the rotating seat, and a pressure roller is arranged on the top of the unloading conveying assembly.

8. The method for preparing a multifunctional thin and flexible film according to claim 1, characterized in that: In step S3, the heating layer is a transparent nano alloy material, and the thickness of the heating layer is 2-5 μm.

9. The method for preparing a multifunctional thin and flexible film according to claim 1, characterized in that: The thickness of the PET base layer is 0.075-0.188 mm.

10. A multifunctional thin and flexible film, characterized in that: include: PET base layer; The shielding layer is fixedly arranged on one side of the PET base layer, and the shielding layer is in a grid shape; A heating layer, the heating layer is fixedly arranged on the other side of the PET base layer; There are two bus bars, both of which are fixedly arranged on the surface of the heating layer away from the PET base layer.

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