Waterproof thermo-sensitive paper with secondary back-coated waterproof coating and production method of waterproof thermo-sensitive paper

Abstract

The invention relates to the technical field of thermo-sensitive paper processing, in particular to waterproof thermo-sensitive paper with a secondary back-coated waterproof coating and a production method thereof.The waterproof thermo-sensitive paper comprises a thermo-sensitive paper body not coated with the waterproof coating, a device frame used for transporting the thermo-sensitive paper body and a box body arranged on the device frame and further comprises an unwinding mechanism, an unwinding mechanism and a waterproof coating mechanism, the unwinding mechanism is used for unwinding the coiled thermo-sensitive paper body, and one end of the thermo-sensitive paper body is output from the output end of the unwinding mechanism. A thermo-sensitive paper body is unwound through the unwinding mechanism, the moving track and the tightness degree of the thermo-sensitive paper body are adjusted through the guide roller, then the thermo-sensitive paper body with good tension enters the first gluing mechanism, the surface of one side of the thermo-sensitive paper body is subjected to primary gluing through the gluing roller, and the surface of the other side of the thermo-sensitive paper body is subjected to secondary gluing. Then, the lower drying mechanism is used for drying the glued thermo-sensitive paper body, and then the second gluing mechanism is used for carrying out secondary gluing on the surface of the thermo-sensitive paper body which is glued for the first time.

Description

Technical Field

[0001] The invention relates to waterproof thermal paper with a secondary back-coated waterproof coating and a production method thereof, belonging to the technical field of thermal paper processing. Background Art

[0002] Thermal paper, also known as thermal fax paper, thermal recording paper or thermal copy paper, is a special processed paper. Its manufacturing principle is to apply a layer of "thermal coating" on high-quality base paper. Thermal paper does not rely on traditional ink or toner, but uses heat to produce high-quality prints. This paper is widely used in many fields such as receipts, labels, tickets, etc.

[0003] Thermal paper has a wide range of uses. In order to make thermal paper have a certain degree of water resistance during use, one or more layers of special waterproof materials are applied to the surface or inside of the thermal paper. The most common way to apply a layer of waterproof coating on thermal paper is to apply a layer of waterproofing agent on the back to form a waterproof layer to prevent moisture from penetrating the paper and prevent moisture from penetrating the internal paper base.

[0004] However, in the existing production process, most of them only carry out a back coating process on the thermal paper, and the back coating process is to use some waterproof, oil-proof and friction-proof materials to coat a layer on the back of the thermal paper to form a protective layer. However, the protective layer has limited ability to prevent moisture penetration, and the waterproof layer is more easily broken, which makes it easier for moisture to invade the thermal paper body without hindrance, making the thermal paper unable to be used effectively.

[0005] Therefore, there is an urgent need to improve the waterproof thermal paper device with a secondary back-coated waterproof coating to solve the above-mentioned problems. Summary of the invention

[0006] The purpose of the present invention is to provide a waterproof thermal paper with a secondary back-coated waterproof coating and a production method thereof, wherein the thermal paper body can be unwound by an unwinding mechanism, and the running track and tightness of the thermal paper body can be adjusted by a guide roller, and then the thermal paper body with better tension enters a first gluing mechanism, and a gluing roller is used to apply glue to the surface of one side of the thermal paper body, and then a lower drying mechanism is used to dry the thermal paper body after gluing, and then a second gluing mechanism is used to apply glue to the surface of the thermal paper body that has been glued once, and then an upper drying mechanism is used to dry the thermal paper body after the second gluing, and finally the thermal paper body is wound up by a winding roller after the second waterproof gluing, and the second waterproof glue coating of the thermal paper body is completed, thereby increasing the waterproof performance of the thermal paper body and improving the practicality of the thermal paper body.

[0007] In order to achieve the above-mentioned purpose, the main technical scheme adopted by the present invention includes: a method for producing waterproof thermal paper with a secondary back-coated waterproof coating, comprising a thermal paper body without a waterproof coating, a device frame for transporting the thermal paper body, and a box body arranged on the device frame, and also includes: An unwinding mechanism, the unwinding mechanism is used to unwind the rolled thermal paper body, one end of the thermal paper body is output from the output end of the unwinding mechanism; a gluing mechanism 1, the gluing mechanism 1 is located at the output end of the unwinding mechanism, the input end of the gluing mechanism 1 inputs the thermal paper body output from the output end of the unwinding mechanism and glues one side of the thermal paper body; a lower drying mechanism, the upper drying mechanism is arranged near the bottom of the box, the input end of the lower drying mechanism receives the thermal paper body output from the output end of the gluing mechanism 1 and glues the thermal paper body The side surface of the glued paper is dried; a second gluing mechanism, the second gluing mechanism is arranged at the output end of the lower drying mechanism, and the second gluing mechanism receives the thermal paper body outputted from the output end of the lower drying mechanism and glues the side surface of the thermal paper body that has been glued again; an upper drying mechanism, the second gluing mechanism is arranged at the output end of the upper drying mechanism, and the input end of the upper drying mechanism receives the thermal paper body outputted from the output end of the second gluing mechanism, and a winding roller is provided at the output end of the upper drying mechanism for winding up the thermal paper body that has been glued twice.

[0008] Preferably, the unwinding mechanism includes an unwinding roller for unwinding the rolled thermal paper body and a motor 1 for driving the unwinding roller to rotate, the motor 1 is installed on the device frame, the output end of the motor 1 is connected to one end of the unwinding roller, and the unwinding roller is rotatably connected to the device frame.

[0009] Preferably, the gluing mechanism 1 and the gluing mechanism 2 have the same structure and both include a bracket 1, a transport roller rotatably connected to the bracket 1, a coating roller rotatably connected to the device frame and located above the transport roller, and two power rollers for driving the thermal paper body to move, and the two power rollers are arranged in upper and lower positions, and the coating roller corresponds to the position of one of the transport rollers.

[0010] Preferably, one end of each of the transport rollers is fixedly connected to a pulley 1, and two of the pulleys 1 are provided with a transmission belt 1, one end of each of the two power rollers is fixedly connected to a gear 1, and the two gears 1 are meshed with each other, one end of one of the power rollers and one end of one of the transport rollers are fixedly connected to a pulley 2, and two of the pulleys 2 are provided with a transmission belt 2, and one end of one of the transport rollers is provided with a motor 2 for driving the transport roller.

[0011] Preferably, the bracket one is equipped with a motor three for driving the coating roller to rotate, the bracket one is fixedly connected with an arc-shaped spray plate, a pump body and a conduit, and the output end of the arc-shaped spray plate faces the outer surface of the coating roller, the output end of the pump body is connected with the input end of the conduit, and the output end of the conduit is connected with the input end of the arc-shaped spray plate, the bracket one is fixedly connected with a scraper and a collecting trough, the scraper is located on the side of the coating roller away from the arc-shaped spray plate and contacts with the outer surface of the coating roller, and the collecting trough is located below the scraper and is used to receive the waterproof glue scraped off by the scraper.

[0012] Preferably, a plurality of guide rollers are provided between the unwinding mechanism and the gluing mechanism, a driving structure for driving the guide rollers to rotate synchronously in the same direction is provided on one side of the guide rollers, and the outer surfaces of the plurality of guide rollers are in contact with the thermal paper body and guide the transportation of the thermal paper body.

[0013] Preferably, the drying box is provided with a conveying cavity, and a plurality of smoothing rollers are rotatably connected inside the conveying cavity, and the plurality of smoothing rollers are staggered with each other, and the input end of the conveying cavity receives the thermal paper body outputted from the output end of the lower drying mechanism, and the output end of the conveying cavity is connected to the input end of the second gluing mechanism.

[0014] Preferably, the upper drying mechanism has the same structure as the lower drying mechanism and both include a plurality of rotating rollers, an air guide plate located above the rotating rollers, a heating wire located above the air guide plate, a bellows located above the heating wire, and a plurality of fans located on both sides of the bellows.

[0015] Preferably, the output end of the air guide box faces the rotating roller, the output end of the fan faces the inside of the air box, the output end of the air box faces the heating wire, and the air guide plate applies hot air from the heating wire to the thermal paper body located on the rotating roller.

[0016] A method for producing waterproof thermal paper with a secondary back-coated waterproof coating comprises the following steps: S1: First, place the rolled thermal paper body on the unwinding roller, pass one end of the thermal paper body through the guide roller and connect it to the input end of the gluing mechanism 1. One end of the thermal paper body is always moving with the operation of the cover device structure. The motor 1 drives the unwinding roller to rotate, which matches the movement of one end of the thermal paper body.

[0017] S2: When one end of the thermal paper body is located inside the gluing mechanism, the lower surface of the thermal paper body contacts the transport roller, while the upper surface of the thermal paper body contacts the gluing roller. Then the waterproof glue is introduced through the conduit, and is sprayed out from the output end of the arc-shaped spray plate under the drive of the pump body and acts on the gluing roller. The rotation speed of the gluing roller is different from the rotation speed of the transport. At this time, the waterproof glue on the gluing roller will be smeared on the upper surface of the thermal paper body.

[0018] S3: Then, the second motor drives the power roller to transport the glue-coated thermal paper body, and the glue-coated thermal paper body is introduced from the input end of the lower drying mechanism. When entering the lower drying mechanism, the air guide plate directs the hot air from the heating wire to the thermal paper body on the rotating roller, and dries the waterproof glue on the thermal paper body.

[0019] S4: Then, the input end of the gluing mechanism 2 receives the thermal paper body that has been glued once, and the outer surface of the gluing roller on the gluing mechanism 2 contacts the side surface of the thermal paper body that has been glued, and then the glued surface of the thermal paper body is glued for the second time by running the process in S.

[0020] S5: The thermal paper body that has been coated with glue twice is solidified by the drying action of the upper drying mechanism, and finally the thermal paper body that has been coated with glue twice is rolled up by the winding roller.

[0021] The present invention has at least the following beneficial effects: 1. The thermal paper body is unwound by the unwinding mechanism, and the running track and tightness of the thermal paper body are adjusted by the guide roller. Then the thermal paper body with good tension enters the gluing mechanism 1, and the gluing roller is used to apply glue to the surface of one side of the thermal paper body. Then the lower drying mechanism dries the thermal paper body after gluing. Then the gluing mechanism 2 applies glue to the surface of the thermal paper body that has been glued once for the second time. Then the upper drying mechanism is used to dry the thermal paper body after the second gluing. Finally, the rewinding roller completes the rewinding of the thermal paper body by the second waterproof gluing, and completes the second waterproof glue coating on the thermal paper body, thereby increasing the waterproof performance of the thermal paper body and improving the practicality of the thermal paper body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 A schematic diagram of the planar structure provided by the present invention; Figure 2 A three-dimensional schematic diagram of a box provided by the present invention; Figure 3 The isometric side cross-sectional structure of the box provided by the present invention is schematically shown. Figure 1 ; Figure 4 The isometric side cross-sectional structure of the box provided by the present invention is schematically shown. Figure 2 ; Figure 5 The present invention provides Figure 2 Schematic diagram of the structure of the middle part; Figure 6 Schematic diagram of the structure of the gluing mechanism 1 and the gluing mechanism 2 provided by the present invention Figure 1 ; Figure 7 Schematic diagram of the structure of the gluing mechanism 1 and the gluing mechanism 2 provided by the present invention Figure 2 ; Figure 8 The present invention provides Figure 6 The structure of the middle part Figure 1 ; Fig. 9 The present invention provides Figure 6 The structure of the middle part Figure 2 ; Fig.10 The present invention provides Figure 1 A three-dimensional schematic diagram of the structure of the middle part; Fig.11 The present invention provides Fig.10 Schematic diagram of the middle part structure.

[0023] In the figure, 1, thermal paper body; 2, device frame; 3, box body; 4, winding roller; 5, unwinding roller; 6, motor 1; 7, bracket 1; 8, transport roller; 80, pulley 1; 801, transmission belt 1; 9, coating roller; 90, motor 3; 10, power roller; 101, gear 1; 12, pulley 2; 13, transmission belt 2; 14, motor 2; 15, arc spray plate; 16, pump body; 17, conduit; 18, scraper; 19, collecting tank; 20, guide roller; 21, driving structure; 22, conveying cavity; 23, smoothing roller; 24, rotating roller; 25, air guide plate; 26, heating wire; 27, bellows; 28, fan. DETAILED DESCRIPTION

[0024] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0025] like Figure 1-Figure 11As shown, the production method of waterproof thermal paper with a secondary back-coated waterproof coating provided in this embodiment includes a thermal paper body 1 not coated with a waterproof coating, a device frame 2 for transporting the thermal paper body 1, and a box 3 arranged on the device frame 2, and also includes: a reeling mechanism, the reeling mechanism is used to unroll the rolled thermal paper body 1, and one end of the thermal paper body 1 is output from the output end of the reeling mechanism.

[0026] The gluing mechanism 1 is located at the output end of the unwinding mechanism. The input end of the gluing mechanism 1 inputs the thermal paper body 1 output by the output end of the unwinding mechanism and glues one side of the thermal paper body 1.

[0027] The lower drying mechanism and the upper drying mechanism are arranged near the bottom of the box body 3. The input end of the lower drying mechanism receives the thermal paper body 1 outputted from an output end of the gluing mechanism and dries the side surface of the thermal paper body 1 which has been glued.

[0028] The second gluing mechanism is arranged at the output end of the lower drying mechanism, and receives the thermal paper body 1 outputted from the output end of the lower drying mechanism and glues the side surface of the thermal paper body 1 which has been glued again.

[0029] The upper drying mechanism and the second gluing mechanism are arranged at the output end of the upper drying mechanism, and the input end of the upper drying mechanism receives the thermal paper body 1 outputted from the output end of the second gluing mechanism, and a winding roller 4 is arranged at the output end of the upper drying mechanism and is used to wind up the thermal paper body 1 which has been glued for the second time.

[0030] A conveying cavity 22 is provided on the drying box, and a plurality of smoothing rollers 23 are rotatably connected inside the conveying cavity 22, and the plurality of smoothing rollers 23 are staggered with each other. The input end of the conveying cavity 22 receives the thermal paper body 1 output from the output end of the lower drying mechanism, and the output end of the conveying cavity 22 is connected to the input end of the gluing mechanism 2.

[0031] Compared with waterproof thermal paper with single back-coating waterproof coating, waterproof thermal paper with secondary back-coating waterproof coating has the following advantages: First of all, the secondary back-coating waterproof coating of thermal paper has stronger protective performance than the primary back-coating waterproof coating of thermal paper. The secondary back-coating waterproof coating of thermal paper has an extra layer of protective material than the primary back-coating waterproof coating of thermal paper, which has stronger water isolation ability and has the characteristics of double protection; Secondly, the secondary back-coating waterproof coating of thermal paper has stronger friction resistance than the primary back-coating waterproof coating of thermal paper. The secondary back-coating can provide a more uniform and continuous protective layer, reducing the problems caused by uneven protective layer, making the protection strength of each point on the entire surface of the thermal paper body 1 equal, increasing its mechanical strength, and making the waterproof performance of each point on the thermal paper body 1 uniform and equal, with better effect. When the thermal paper is in use, the surface friction resistance is strong, and the probability of exposing the base paper layer when damaged is smaller, reducing local wear or shedding, that is, the risk of water penetrating from the friction part to the base paper is smaller; Finally, the secondary back-coating waterproof coating of thermal paper can better adapt to the changing storage environment and use environment. The secondary back-coating waterproof uses two different waterproof materials to form a protective layer. Compared with the waterproof materials used in the primary back-coating waterproof, the two waterproof materials can cope with more situations, even if the thermal paper body 1 is in humid or temperature difference conditions. It can maintain good performance, specifically to prevent condensation water caused by temperature difference from adhering to the thermal paper and damaging the thermal paper, thereby extending the service life of the thermal paper and maintaining the clarity of the printed image.

[0032] Among them, the unwinding mechanism includes an unwinding roller 5 for unwinding the rolled thermal paper body 1 and a motor 6 for driving the unwinding roller 5 to rotate. The motor 6 is installed on the device frame 2, and the output end of the motor 6 is connected to one end of the unwinding roller 5, and the unwinding roller 5 is rotatably connected to the device frame 2.

[0033] Furthermore, as shown in the figure and the figure, the gluing mechanism 1 has the same structure as the gluing mechanism 2 and both include a bracket 7, a transport roller 8 rotatably connected to the bracket 7, a coating roller 9 rotatably connected to the device frame 2 and located above the transport roller 8, and two power rollers 10 for driving the thermal paper body 1 to move, and the two power rollers 10 are arranged in upper and lower positions, and the coating roller 9 corresponds to the position of one of the transport rollers 8.

[0034] One end of the transport roller 8 is fixedly connected to a pulley 80, and the two pulleys 80 are provided with a transmission belt 801. One end of the two power rollers 10 is fixedly connected to a gear 101, and the two gears 101 are meshed with each other. One end of one of the power rollers 10 and one end of one of the transport rollers 8 are fixedly connected to a pulley 12, and the two pulleys 12 are provided with a transmission belt 13. One end of one of the transport rollers 8 is provided with a motor 14 for driving the transport roller 8.

[0035] A motor 390 for driving the coating roller 9 to rotate is installed on the bracket 7, and an arc-shaped spray plate 15, a pump body 16 and a conduit 17 are fixedly connected to the bracket 7, and the output end of the arc-shaped spray plate 15 faces the outer surface of the coating roller 9, the output end of the pump body 16 is connected to the input end of the conduit 17, and the output end of the conduit 17 is connected to the input end of the arc-shaped spray plate 15. A scraper 18 and a collecting tank 19 are fixedly connected to the bracket 7. The scraper 18 is located on the side of the coating roller 9 away from the arc-shaped spray plate 15 and contacts the outer surface of the coating roller 9. The collecting tank 19 is located below the scraper 18 and is used to receive the waterproof glue scraped off by the scraper 18 Furthermore, a plurality of guide rollers 20 are provided between the unwinding mechanism and the gluing mechanism, and a driving structure 21 for driving the guide rollers 20 to rotate synchronously in the same direction is provided on one side of the guide rollers 20, and the outer surfaces of the plurality of guide rollers 20 are in contact with the thermal paper body 1 and guide the transportation of the thermal paper body 1.

[0036] Furthermore, the upper drying mechanism has the same structure as the lower drying mechanism and both include a plurality of rotating rollers 24, an air guide plate 25 located above the rotating roller 24, a heating wire 26 located above the air guide plate 25, a bellows 27 located above the heating wire 26, and a plurality of fans 28 located on both sides of the bellows 27, the output end of the air guide box 27 faces the rotating roller 24, the output end of the fan 28 faces the inside of the bellows 27, the output end of the bellows 27 faces the heating wire 26, and the air guide plate 25 applies the hot air from the heating wire 26 to the thermal paper body 1 located on the rotating roller 24.

[0037] The thermal paper body 1 is unwound by the unwinding mechanism, and the running track and tightness of the thermal paper body 1 are adjusted by the guide roller 20. Then the thermal paper body 1 with better tension enters the gluing mechanism 1, and the surface of one side of the thermal paper body 1 is once coated with glue by the gluing roller. Then the lower drying mechanism dries the thermal paper body 1 after gluing. Then the gluing mechanism 2 coats the surface of the thermal paper body 1 that has been coated with glue once for a second time. Then the upper drying mechanism dries the thermal paper body 1 after the second coating of glue. Finally, the thermal paper body 1 is rolled up by the winding roller 4 after the second waterproof coating, and the second waterproof glue coating of the thermal paper body 1 is completed.

[0038] like Figure 1-Figure 11 As shown, the present embodiment provides a method for producing a waterproof thermal paper having a secondary back-coated waterproof coating, comprising the following steps: S1: First, place the rolled thermal paper body 1 on the unwinding roller 5, pass one end of the thermal paper body 1 through the guide roller 20 and connect it to the input end of the gluing mechanism 1, and one end of the thermal paper body 1 is always moving with the operation of the cover device structure, and the motor 1 6 drives the unwinding roller 5 to rotate, which matches the movement of one end of the thermal paper body 1.

[0039] S2: When one end of the thermal paper body 1 is located inside the gluing mechanism 1, the lower surface of the thermal paper body 1 contacts the transport roller 8, while the upper surface of the thermal paper body 1 contacts the gluing roller. Then the waterproof glue is introduced by the conduit 17, and is sprayed out from the output end of the arc-shaped spray plate 15 driven by the pump body 16 and acts on the gluing roller. The rotation speed of the gluing roller is different from the rotation speed of the transport. At this time, the waterproof glue on the gluing roller will be smeared on the upper surface of the thermal paper body 1.

[0040] S3: Then, the motor 2 14 drives the power roller 10 to transport the glue-coated thermal paper body 1, and the glue-coated thermal paper body 1 is introduced from the input end of the lower drying mechanism. When entering the lower drying mechanism, the air guide plate 25 directs the hot air from the heating wire 26 to the thermal paper body 1 located on the rotating roller 24, and dries the waterproof glue on the thermal paper body 1.

[0041] S4: Then, the input end of the second gluing mechanism receives the thermal paper body 1 that has been glued once, and the outer surface of the gluing roller on the second gluing mechanism contacts the side surface of the thermal paper body 1 that has been glued, and then the glued surface of the thermal paper body 1 is glued for the second time by running the process in S2.

[0042] S5: The thermal paper body 1 that has been coated with glue twice is solidified by the drying action of the upper drying mechanism, and finally the winding roller 4 winds up the thermal paper body 1 that has been coated with glue twice.

[0043] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0044] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0045] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A method for producing waterproof thermal paper with a secondary back-coated waterproof coating, comprising a thermal paper body (1) not coated with a waterproof coating, a device frame (2) for transporting the thermal paper body (1), and a box (3) arranged on the device frame (2), characterized in that: Also includes: An unwinding mechanism, the unwinding mechanism being used to unwind a rolled thermal paper body (1), one end of the thermal paper body (1) being output from an output end of the unwinding mechanism; A gluing mechanism 1, the gluing mechanism 1 being located at the output end of the unwinding mechanism, the input end of the gluing mechanism 1 inputting the thermal paper body (1) outputted from the output end of the unwinding mechanism and gluing one side of the thermal paper body (1); A lower drying mechanism, wherein the upper drying mechanism is arranged in the box body (3) near the bottom, the input end of the lower drying mechanism receives the thermal paper body (1) outputted from an output end of the gluing mechanism and dries a side surface of the thermal paper body (1) that has been glued; A second gluing mechanism, the second gluing mechanism being arranged at the output end of the lower drying mechanism, and the second gluing mechanism receiving the thermal paper body (1) outputted from the output end of the lower drying mechanism and re-gluing the side surface of the thermal paper body (1) that has been glued; An upper drying mechanism, wherein the second gluing mechanism is arranged at the output end of the upper drying mechanism, and the input end of the upper drying mechanism receives the thermal paper body (1) outputted from the output end of the second gluing mechanism, and a winding roller (4) is arranged at the output end of the upper drying mechanism and is used to wind up the thermal paper body (1) that has been glued twice.

2. The method for producing a waterproof thermal paper having a secondary back-coated waterproof coating according to claim 1, characterized in that: The unwinding mechanism comprises an unwinding roller (5) for unwinding the rolled thermal paper body (1) and a motor (6) for driving the unwinding roller (5) to rotate, the motor (6) being mounted on the device frame (2), the output end of the motor (6) being connected to one end of the unwinding roller (5), and the unwinding roller (5) being rotatably connected to the device frame (2).

3. The method for producing a waterproof thermal paper having a secondary back-coated waterproof coating according to claim 1, characterized in that: The gluing mechanism 1 and the gluing mechanism 2 have the same structure and both comprise a bracket 1 (7), a transport roller (8) rotatably connected to the bracket 1 (7), a coating roller (9) rotatably connected to the device frame (2) and located above the transport roller (8), and two power rollers (10) for driving the thermal paper body (1) to move, and the two power rollers (10) are arranged in upper and lower positions, and the coating roller (9) corresponds to the position of one of the transport rollers (8).

4. The method for producing a waterproof thermal paper having a secondary back-coated waterproof coating according to claim 3, characterized in that: One end of each of the transport rollers (8) is fixedly connected to a pulley 1 (80), and a transmission belt 1 (801) is sleeved on the two pulleys 1 (80); one end of each of the two power rollers (10) is fixedly connected to a gear 1 (101), and the two gears 1 (101) are meshed with each other; one end of one of the power rollers (10) and one end of one of the transport rollers (8) are fixedly connected to a pulley 2 (12), and a transmission belt 2 (13) is sleeved on the two pulleys 2 (12); and one end of one of the transport rollers (8) is provided with a motor 2 (14) for driving the transport roller (8).

5. The method for producing a waterproof thermal paper having a secondary back-coated waterproof coating according to claim 3, characterized in that: The bracket one (7) is provided with a motor three (90) for driving the coating roller (9) to rotate. The bracket one (7) is fixedly connected with an arc-shaped spray plate (15), a pump body (16) and a conduit (17). The output end of the arc-shaped spray plate (15) faces the outer surface of the coating roller (9). The output end of the pump body (16) is connected to the input end of the conduit (17). The output end of the conduit (17) is connected to the input end of the arc-shaped spray plate (15). The bracket one (7) is fixedly connected with a scraper (18) and a collecting trough (19). The scraper (18) is located on a side of the coating roller (9) away from the arc-shaped spray plate (15) and in contact with the outer surface of the coating roller (9). The collecting trough (19) is located below the scraper (18) and is used to receive the waterproof glue scraped off by the scraper (18).

6. The method for producing a waterproof thermal paper having a secondary back-coating waterproof coating according to claim 1, characterized in that: A plurality of guide rollers (20) are provided between the unwinding mechanism and the gluing mechanism, and a driving structure (21) for driving the guide rollers (20) to rotate synchronously in the same direction is provided on one side of the guide rollers (20), and the outer surfaces of the plurality of guide rollers (20) are in contact with the thermal paper body (1) and guide the transportation of the thermal paper body (1).

7. The method for producing waterproof thermal paper with secondary back-coating waterproof coating according to claim 1, characterized in that: The drying box is provided with a conveying cavity (22), a plurality of smoothing rollers (23) are rotatably connected inside the conveying cavity (22), and the plurality of smoothing rollers (23) are arranged alternately with each other, an input end of the conveying cavity (22) receives the thermal paper body (1) outputted from the output end of the lower drying mechanism, and the output end of the conveying cavity (22) is connected to the input end of the second gluing mechanism.

8. The method for producing waterproof thermal paper with secondary back-coating waterproof coating according to claim 1, characterized in that: The upper drying mechanism has the same structure as the lower drying mechanism and both comprise a plurality of rotating rollers (24), an air guide plate (25) located above the rotating rollers (24), a heating wire (26) located above the air guide plate (25), a bellows (27) located above the heating wire (26), and a plurality of fans (28) located on both sides of the bellows (27).

9. The method for producing waterproof thermal paper with secondary back-coating waterproof coating according to claim 1, characterized in that: The output end of the air guide box (27) faces the rotating roller (24), the output end of the fan (28) faces the interior of the air box (27), the output end of the air box (27) faces the heating wire (26), and the air guide plate (25) directs the hot air from the heating wire (26) to the thermal paper body (1) located on the rotating roller (24).

10. A method for producing waterproof thermal paper with a secondary back-coated waterproof coating, characterized in that: The steps include: S1: First, a rolled thermal paper body (1) is placed on an unwinding roller (5), one end of the thermal paper body (1) passes through a guide roller (20) and is connected to an input end of a gluing mechanism 1. One end of the thermal paper body (1) is constantly moving along with the operation of the cover device structure, and a motor 1 (6) drives the unwinding roller (5) to rotate, thereby coordinating the movement of one end of the thermal paper body (1); S2: When one end of the thermal paper body (1) is located inside the gluing mechanism 1, the lower surface of the thermal paper body (1) contacts the transport roller (8), while the upper surface of the thermal paper body (1) contacts the gluing roller. Then, the waterproof glue is introduced through the conduit (17), and is sprayed out from the output end of the arc-shaped spray plate (15) under the drive of the pump body (16) and acts on the gluing roller. The rotation speed of the gluing roller is different from the rotation speed of the transport. At this time, the waterproof glue on the gluing roller will be smeared on the upper surface of the thermal paper body (1); S3: Then, the motor 2 (14) drives the power roller (10) to convey the glue-coated thermal paper body (1), and the glue-coated thermal paper body (1) is introduced from the input end of the lower drying mechanism. When entering the lower drying mechanism, the air guide plate (25) directs the hot air from the heating wire (26) to the thermal paper body (1) located on the rotating roller (24), and dries the waterproof glue on the thermal paper body (1); S4: Then, the input end of the second gluing mechanism receives the thermal paper body (1) that has been glued once, and the outer surface of the gluing roller on the second gluing mechanism contacts the side surface of the thermal paper body (1) that has been glued, and then the glued surface of the thermal paper body (1) is glued for the second time by running the process in S (2); S5: The thermal paper body (1) that has been coated with glue twice is solidified under the drying effect of the upper drying mechanism, and finally the thermal paper body (1) that has been coated with glue twice is rolled up by the winding roller (4).

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