A solvent-free composite positioning anti-counterfeiting transfer paper and preparation method thereof

Abstract

The present application discloses a solvent-free composite positioning anti-counterfeiting transfer paper and a preparation method thereof, which comprises the following steps: generating a transfer film; generating white cardboard; drying and testing the white cardboard; compounding; finished product: peeling off the PET base film on the composite paper after aging the composite paper to obtain a solvent-free composite positioning anti-counterfeiting transfer paper; in S3, the white cardboard is dried by a drying device, the ink on the white cardboard is detected by a detection device, and the ink on the white cardboard is circulated and dried by a circulation device. The present application has the effect of ensuring the drying of the ink and improving the quality of the finished anti-counterfeiting transfer paper.

Description

Technical Field

[0001] The present application relates to the field of anti-counterfeiting transfer paper, and in particular to a solvent-free composite positioning anti-counterfeiting transfer paper and a preparation method thereof. Background Art

[0002] As people's living standards improve, consumers have put forward higher requirements for product packaging, which has indirectly promoted the development of printing technology. Product packaging has evolved from the initial function of protecting the contents to an important part of product value enhancement and added value creation. Especially for tobacco products, packaging is a business card for promoting brand culture. However, for tobacco packaging, while meeting the decorative and promotional effects, it should also have certain anti-counterfeiting functions and meet the requirements of health and environmental protection. Most of the existing transfer paper production processes use solvent-based adhesives for compounding. However, solvent-based adhesives need to be dried by heating. The drying process not only consumes a lot of energy, but also causes a large amount of VOCs emissions, polluting the environment; and during the use of solvent-based adhesives, the coating amount is large and the cost is high, and the anti-counterfeiting effect of the transfer paper produced is poor.

[0003] In the related art, a Chinese patent with publication number CN110920206A proposes a solvent-free composite positioning anti-counterfeiting transfer paper and a preparation method thereof, wherein the method comprises the steps of: stretching a PET positioning transfer film to a fixed length and then coating it with a solvent-free adhesive to obtain a transfer film having an adhesive layer on the surface; coating a thermochromic ink or an optically color-changing ink on the surface of white cardboard, and obtaining a white cardboard having an anti-counterfeiting layer on the surface after drying; superimposing the transfer film on the white cardboard so that the adhesive layer of the transfer film is in direct contact with the anti-counterfeiting layer of the white cardboard, and composite-treating the superimposed transfer film and white cardboard to obtain composite paper; and peeling off the PET base film on the composite paper after aging the composite paper to obtain the solvent-free composite positioning anti-counterfeiting transfer paper. The present invention realizes the composite production of positioning transfer paper with low cost, low energy consumption and more environmental protection, and also realizes the anti-counterfeiting coating of paper, increases the anti-counterfeiting performance of the product, and realizes multiple anti-counterfeiting.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: the ink on the white card paper is dried by a drying device, and there is currently no detection device for whether the ink is dried. If the ink is not dried sufficiently, it will affect the quality of the final transfer paper product. Summary of the invention

[0005] In order to improve the problem of inconvenience in detecting whether the ink is dried, the present application provides a solvent-free composite positioning anti-counterfeiting transfer paper and a preparation method thereof.

[0006] The present application provides a method for preparing a solvent-free composite positioning anti-counterfeiting transfer paper using the following technical solution:

[0007] A method for preparing a solvent-free composite positioning anti-counterfeiting transfer paper comprises the following steps:

[0008] Generating a transfer film: after the PET positioning transfer film is stretched to a fixed length, a solvent-free adhesive is coated on the film to obtain a transfer film having an adhesive layer on the surface;

[0009] Generating white card paper: coating the surface of white card paper with optical color-changing ink, and obtaining white card paper with an anti-counterfeiting layer on the surface after drying;

[0010] White card paper drying test: Dry the ink on the white card paper. If it is not dried, the ink on the white card paper needs to be circulated and dried;

[0011] Compounding: laminating the transfer film on the white cardboard so that the adhesive layer of the transfer film is in direct contact with the anti-counterfeiting layer of the white cardboard, and performing compounding treatment on the laminating transfer film and the white cardboard to obtain compound paper;

[0012] Finished product: after the composite paper is aged, the PET base film on the composite paper is peeled off to obtain the solvent-free composite positioning anti-counterfeiting transfer paper;

[0013] In S3, the white card paper is dried by the drying device, the ink on the white card paper is detected by the detection device, and the ink on the white card paper is circulated and dried by the circulation device;

[0014] The detection device includes a bracket that is lifted and lowered above the drying device, an elastic rope for detecting whether the ink is dry, a winding assembly for winding the elastic rope, an identification mechanism for identifying whether the elastic rope is adhered to ink, and a deformation mechanism for deforming the elastic rope. The bracket is provided with a plurality of guide rollers for guiding the white card paper to the compounding process, and the length direction of the elastic rope is arranged along the axial direction of the guide roller.

[0015] Optionally, the identification mechanism includes an identification film, a color sensor, a cleaning component for cleaning the identification film, and a color-changing component for calibrating the ink, the identification film is movably arranged in the bracket and the movement direction of the identification film is consistent with the movement direction of the elastic rope, the identification film is arranged above the elastic rope, the color sensor is installed on the bracket and is located above the identification film, the identification film is transparent and the color sensor recognizes the ink color after passing through the identification film.

[0016] Optionally, the color-changing component includes a light source and a reflector fixed on the bracket, the reflector is fixed on the bracket and the reflected light of the light source on the reflector is located at a position on the identification film directly facing the color sensor.

[0017] Optionally, the cleaning component includes a traction part for pulling the identification film, a cleaning box, cleaning cotton and an extrusion part for squeezing the cleaning cotton, the cleaning box is fixed under the identification film and the upper end of the cleaning box is open, the cleaning cotton is fixed in the cleaning box, the cleaning box is filled with a cleaning agent for cleaning the ink of the identification film, and the identification film abuts against the upper end of the cleaning cotton.

[0018] Optionally, the traction part includes two traction rollers, two traction motors, an extrusion rope, a plurality of guide rollers and an extrusion block. The two traction rollers are respectively rotatably arranged on both sides of the bracket. The two traction motors respectively control the rotation of the two traction rollers. The two ends of the identification film are respectively fixedly connected to the peripheral walls of the two traction rollers, one end of the extrusion rope is fixedly connected to the extrusion block, and the other end of the extrusion rope is fixedly connected to the outer wall of the traction roller away from the cleaning box. The extrusion rope and the identification film are synchronously wound or released corresponding to the traction rollers, and the plurality of guide rollers guide the extrusion block to be directly above the cleaning box.

[0019] Optionally, the deformation mechanism includes a support frame fixed on the drying device, a deformation rod elastically arranged on the support frame, and a trigger assembly for triggering the retraction of the deformation rod, the movement direction of the deformation rod is set along the axis direction of the guide roller, and the deformation rod is located below the elastic rope and does not abut against the white cardboard.

[0020] Optionally, the trigger assembly includes a sleeve fixed on the support frame, a driving block, a plug-in block, a power block abutting the driving block, a power member for driving the power block to reciprocate, a trigger block and a driving member that drives the trigger block to move; the side wall of the deformable rod is provided with a slide groove, the plug-in block is elastically arranged in the slide groove, the side wall of the sleeve is provided with a plug-in hole for plugging the plug-in block, the driving block slides in the plug-in hole, the length dimension of the driving block is equal to the depth dimension of the plug-in hole, the trigger block is fixedly connected to the part of the side wall of the deformable rod located outside the sleeve, and the output end of the driving member abuts against the trigger block.

[0021] Optionally, the circulation device includes a circulation frame lifted and lowered on the bracket, a reciprocating part for realizing the reciprocating motion of the circulation frame, a circulation roller rotatably arranged on the circulation frame, a phase change tube for absorbing heat from the drying device, and a drying mechanism for drying the ink again, the circulation roller is arranged between the composite equipment and the drying device, the circulation roller guides the white cardboard to the drying mechanism for further drying, and the reciprocating part is electrically connected to the color sensor.

[0022] Optionally, the drying mechanism includes a water tank, a phase change tube, a lifting assembly for controlling the movement of the phase change tube, a drying box, a water pump for realizing water circulation between the water tank and the drying box, and two water pipes. The water tank is located below the phase change tube, the water pump is arranged in the water tank, the water pipe connects the water tank and the water outlet of the drying box, one end of the other water pipe is connected to the water pump, and the other end of the water pipe is connected to the water inlet of the drying box, and the phase change tube is filled with phase change material for absorbing and releasing heat.

[0023] The present application also provides a solvent-free composite positioning anti-counterfeiting transfer paper using the following technical solution:

[0024] The invention discloses a solvent-free composite positioning anti-counterfeiting transfer paper, which is prepared by adopting a method for preparing the solvent-free composite positioning anti-counterfeiting transfer paper.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The marking film is deformed under the action of the deformation rod. When the deformation rod needs to be triggered to return to its initial position, the power block is driven by the power member to move downward and the power block abuts against the end of the driving block. The power block squeezes the driving block toward the plug hole until the driving block is completely moved into the plug hole. Under the elastic force of the first spring, the deformation rod is pulled back to the initial position, the deformation rod and the elastic rope are deformed, and the elastic rope is ejected toward the white card paper. If the ink on the white card paper is not completely dried, the elastic rope contacts the ink on the white card paper at the moment the elastic rope contacts the ink on the white card paper and the ink adheres to the outer wall of the elastic rope. Due to the elastic force and inertia of the elastic rope, the elastic rope also moves toward the marking film. When there is ink adhering to the identification film, since the identification film is transparent and the recognition range of the color sensor is limited, it is necessary to pull the identification film. During the movement, the color sensor recognizes the ink on the identification film. If the color sensor recognizes that there is ink adhering to the identification film, the ink on the white card paper needs to be dried again.

[0027] 2. The circulation roller moves downward and transports the opposite side of the white card paper to the side wall of the drying box for bonding. Of course, the guide roller can also be used to ensure that most of the white card paper is bonded to the side wall of the drying box. Under the action of hot water in the drying box, the ink can be dried quickly and evenly.

[0028] 3. When ink adheres to the marking film and needs to be cleaned, the traction roller not connected to the squeezing rope is controlled to start winding the marking film. In this embodiment, it is set that only when the squeezing block moves to squeeze the marking film and the elastic rope to abut against the cleaning cotton and the cleaning cotton is squeezed and deformed, the position with ink on the marking film moves to the cleaning cotton position. Therefore, as the marking film is continuously wound, the traction roller connected to the squeezing rope continuously releases the marking film and the squeezing rope until all the positions on the marking film with ink adhere have passed the cleaning cotton. Then the winding of the marking film is stopped, and then the marking film starts to move in the opposite direction, that is, the traction roller connected to the squeezing rope starts to wind the marking film and the squeezing rope at the same time. Similarly, when the marking film originally adhered to ink moves to the specified position, the squeezing block is pulled to a position away from the cleaning cotton to achieve the cleaning of the marking film and the elastic rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a process flow chart of Example 1 of the present application;

[0030] Figure 2 It is a schematic diagram of the overall structure of the first embodiment of the present application;

[0031] Figure 3 is a schematic diagram of the detection device in Example 1 of the present application;

[0032] Figure 4 It is a schematic diagram of the deformation mechanism in Example 1 of the present application.

[0033] 1. Drying device; 2. Bracket; 3. Elastic rope; 4. Identification film; 5. Color sensor; 6. Light source; 7. Reflector; 8. Cleaning box; 9. Cleaning cotton; 10. Traction roller; 11. Extrusion rope; 12. Extrusion block; 13. Support frame; 14. Deformation rod; 15. Sleeve; 16. Drive block; 17. Plug-in block; 18. Slide groove; 19. Plug-in hole; 20. Power block; 21. Power member; 22. Trigger block; 23. Drive member; 24. First spring; 25. Second spring; 26. Circulation frame; 27. Reciprocating member; 28. Circulation roller; 29. ​​Phase change tube; 30. Lifting assembly; 31. Drying box; 32. Water tank; 33. Water pump; 34. Water pipe. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-4 This application is described in further detail.

[0035] Embodiment 1

[0036] The present application embodiment discloses a method for preparing a solvent-free composite positioning anti-counterfeiting transfer paper. Figure 1 A method for preparing a solvent-free composite positioning anti-counterfeiting transfer paper comprises the following steps:

[0037] S1, generating a transfer film: stretching the PET positioning transfer film to a fixed length and then coating it with a solvent-free adhesive to obtain a transfer film having an adhesive layer on the surface;

[0038] S2. Producing white cardboard: coating the surface of the white cardboard with optically variable ink, and obtaining the white cardboard with an anti-counterfeiting layer on the surface after drying; the optically variable ink comprises, by weight: 20-40 parts of polyurethane resin, 20-40 parts of polyester resin, 25-35 parts of tripropylene glycol diacrylate, 15-25 parts of trimethylolpropane triacrylate, 5-9 parts of benzophenone derivatives, 3-5 parts of active amines, 1-5 parts of 2-isopropylthioxanthone, 5-10 parts of fillers, 0-2 parts of silicone oil and 15-20 parts of optically variable pigment OYB20.

[0039] S3, White card paper drying test: Dry the ink on the white card paper. If it is not dried, the ink on the white card paper needs to be circulated and dried;

[0040] S4, compounding: laminating the transfer film on the white cardboard so that the adhesive layer of the transfer film is in direct contact with the anti-counterfeiting layer of the white cardboard, and performing a compounding treatment on the laminating transfer film and the white cardboard to obtain a compound paper;

[0041] S5, finished product: after the composite paper is aged, the PET base film on the composite paper is peeled off to obtain the solvent-free composite positioning anti-counterfeiting transfer paper.

[0042] Reference Figure 2 and Figure 3 In S3, the white card paper is dried by the drying device 1, the ink on the white card paper is detected by the detection device, and the ink on the white card paper is circulated and dried by the circulation device; in this embodiment, the drying device 1 includes a drying rack and an ultraviolet lamp fixed on the drying rack, the ultraviolet lamp irradiates the ink on the white card paper and then dries the ink on the white card paper, the detection device detects the ink on the white card paper, and if it is detected that the ink is not dry, the circulation device needs to dry the ink before proceeding to the next composite process.

[0043] Reference Figure 2 and Figure 3The detection device includes a bracket 2 which is lifted and arranged above the drying device 1, an elastic rope 3 for detecting whether the ink is dry, a winding assembly for winding the elastic rope 3, an identification mechanism for identifying whether the elastic rope 3 adheres to the ink, and a deformation mechanism for deforming the elastic rope 3. The bracket 2 is provided with a plurality of guide rollers for guiding the white card paper to the composite process. The axial direction of the guide roller is perpendicular to the movement direction of the white card paper. One side of the ink on the white card paper faces the ultraviolet lamp. The length direction of the elastic rope 3 is arranged along the axial direction of the guide roller. The elastic rope 3 is made of elastic material. The winding assembly includes two winding rollers and two winding motors. The axial direction of the winding roller is parallel to the length direction of the guide roller. The two ends of the elastic rope 3 are respectively fixedly connected to the outer peripheral walls of the two winding rollers. The winding motor is installed on the bracket 2 and is used to drive the winding roller to rotate. The elastic rope 3 is installed above the guide roller located at the highest position, that is, the white card paper passes through this guide roller and moves to the composite process.

[0044] Reference Figure 2 and Figure 3 The marking mechanism includes a marking film 4, a color sensor 5, a cleaning component for cleaning the marking film 4, and a color-changing component for calibrating the ink. The marking film 4 is transparent to ensure that it will not affect the color sensor 5's recognition of the ink on the marking film 4. The color sensor 5 is installed directly above the marking film 4. The marking film 4 is movably arranged on the bracket 2 and the movement direction of the marking film 4 is consistent with the movement direction of the elastic rope 3. The marking film 4 is located above the elastic rope 3. The color sensor 5 recognizes the color of the ink after passing through the marking film 4. In this embodiment, the color sensor 5 recognizes the color of the ink, and due to the cross-sectional size effect of the elastic rope 3, it is only necessary to control the reciprocating motion of the elastic rope 3. The cleaning component can clean the elastic rope 3 while cleaning the marking film 4.

[0045] Reference Figure 3 and Figure 4The deformation mechanism includes a support frame 13 fixed on the drying device 1, a deformation rod 14 elastically arranged on the support frame 13, and a trigger assembly for triggering the deformation rod 14 to retract. The support frame 13 is fixed on the drying frame, and the deformation rod 14 is located below the elastic rope 3. The movement direction of the deformation rod 14 is arranged along the axis direction of the guide roller, that is, the movement direction of the deformation rod 14 is arranged perpendicular to the movement direction of the elastic rope 3 and the deformation rod 14 does not abut against the white card paper. When the deformation rod 14 is in an extended state, the elastic rope 3 is in an upward deformation state. When the deformation rod 14 is retracted, the elastic rope 3 abuts against the white card paper under the action of its elastic force. Since there is a guide roller under the white card paper, the elastic rope 3 is elastic to the white card paper at this time. The purpose of selecting the elastic rope 3 in this embodiment is first to ensure that the elastic rope 3 can fully contact with the ink on the white card paper through the elastic force of the elastic rope 3, so as to ensure the detection of whether the ink is dry. In addition, due to the elastic force of the elastic rope 3, the elastic rope 3 can be quickly separated from the white card paper after contacting the white card paper, and will not affect other positions of the white card paper.

[0046] The trigger assembly includes a sleeve 15 fixed on the support frame 13, a driving block 16, a plug-in block 17, a power block 20, a power piece 21 for driving the power block 20 to reciprocate, a trigger block 22, and a driving piece 23 for driving the trigger block 22 to move. The sleeve 15 is open and one end facing the deformation rod 14 is open. The deformation rod 14 slides in the sleeve 15. A first spring 24 is fixedly connected between one end of the deformation rod 14 located in the sleeve 15 and the inner wall of the end of the sleeve 15. A slide groove 18 is fixedly connected to the side wall of the deformation rod 14. The plug-in block 17 is elastically arranged in the slide groove 18. A second spring 25 is fixedly connected between one end of the plug-in block 17 located in the slide groove 18 and the inner wall of the end of the slide groove 18. The side wall of the sleeve 15 is provided with The plug-in hole 19 is used for plugging the plug-in block 17, and the drive block 16 slides in the plug-in hole 19. The length dimension of the drive block 16 is equal to the depth dimension of the plug-in hole 19. When the plug-in block 17 is located on the inner wall of the sleeve 15, the plug-in block 17 is located in the slide groove 18, and the second spring 25 is squeezed and deformed. When the deformation rod 14 moves in the direction away from the sleeve 15, the first spring 24 is in a tensile deformation until the plug-in block 17 moves to the position in the plug-in hole 19. At this time, the plug-in block 17 is plugged into the plug-in hole 19 under the elastic force of the second spring 25, and the drive block 16 is pushed to a position away from the plug-in hole 19, and the drive block 16 will not fall off from the plug-in hole 19. When the deformation rod 14 moves to the specified position, the plug-in block 17 is plugged into the plug-in hole 19.

[0047] The trigger block 22 is fixedly connected to the side wall of the deformation rod 14 located outside the sleeve 15, and the power block 20 is used to drive the drive block 16. The power block 20 abuts against the end of the drive block 16, and the output end of the drive member 23 abuts against the trigger block 22. The drive member 23 and the power member 21 can both use electric push rods or cylinders. When the deformation rod 14 needs to be triggered to return to its initial position, the power block 20 is driven by the power member 21 to move downward and the power block 20 abuts against the end of the drive block 16. The power block 20 squeezes the drive block 16 toward the plug hole 19 until the drive block 16 is completely moved into the plug hole 19. Under the elastic force of the first spring 24, the deformation rod 14 is pulled back to its initial position, the deformation rod 14 and the elastic rope 3 are deformed, and the elastic rope 3 is ejected toward the direction of the white cardboard. If the ink on the white cardboard is not completely dried, the elastic rope 3 contacts the ink on the white cardboard at the moment when the elastic rope 3 and The ink on the white cardboard contacts and adheres to the outer wall of the elastic cord 3, and due to the elastic force and inertia of the elastic cord 3, the elastic cord 3 also moves toward the direction of the marking film 4. Of course, in this embodiment, when the deformation rod 14 deforms the elastic cord 3, the elastic cord 3 can also contact the marking film 4. In order to ensure that the elastic cord 3 can contact the marking film 4, the marking film 4 can also be deformed under the action of the deformation rod 14. Therefore, when the elastic cord 3 moves toward the white cardboard, the marking film 4 also moves toward the white cardboard. Therefore, the elastic cord 3 will contact the marking film 4 when rebounding. When the marking film 4 is adhered to ink, since the marking film 4 is transparent and the recognition range of the color sensor 5 is limited, it is necessary to pull the marking film 4 during the movement. The color sensor 5 recognizes that the marking film 4 is adhered to ink, and the ink on the white cardboard needs to be dried again. The color sensor 5 triggers the circulation device to work. If the deformation rod 14 needs to deform the elastic rope 3 again, the support 2 needs to be controlled to move downward after returning to its original position, and the deformation rod 14 needs to be extended to a specified position to deform the elastic rope 3.

[0048] Reference Figure 2 and Figure 3 The circulation device includes a circulation frame 26 which is lifted and lowered on the bracket 2, a reciprocating member 27 for realizing the reciprocating motion of the circulation frame 26, a circulation roller 28 which is rotatably arranged on the circulation frame 26, a phase change tube 29 for absorbing the heat of the drying device 1, and a drying mechanism for drying the ink again. The reciprocating member 27 can also be an electric push rod or a cylinder. The circulation roller 28 is arranged between the compounding process and the drying frame, that is, between the white card paper entering the compounding process, if it is detected that the ink is not dried, the circulation roller 28 quickly guides the white card paper to the drying mechanism for drying again. The reciprocating member 27 is electrically connected to the color sensor 5, and the reciprocating member 27 and the color sensor 5 are controlled and connected by a PLC controller. Therefore, when the color sensor 5 recognizes that there is ink on the identification film 4, the circulation frame 26 and the circulation roller 28 are quickly driven to the drying mechanism.

[0049] The drying mechanism includes a water tank 32, a phase change tube 29, a lifting assembly 30 for controlling the movement of the phase change tube 29, a drying box 31, a water pump 33 for realizing water circulation between the water tank 32 and the drying box 31, and two water pipes 34. The lifting assembly 30 in this embodiment can be realized by an electric push rod or by a winch or other structures, preferably an electric push rod. The phase change tube 29 is fixed on the drying rack close to the rear of the ultraviolet lamp. The lifting of the phase change tube 29 is realized by the lifting assembly 30. The phase change tube 29 is filled with a phase change material for absorbing and releasing heat. The phase change material is close to the rear of the ultraviolet lamp, which can absorb the corresponding heat and store it. In this embodiment, water bath heating is selected. The main reason is that after the white cardboard is adjusted in position by the circulation roller 28, one side of the ink on the white cardboard faces the back of the ultraviolet lamp, and the ultraviolet lamp cannot directly heat and dry the white cardboard. Therefore, by attaching the back of the white cardboard to the side wall of the drying box 31, the effect of uniformly drying the ink on the white cardboard can be achieved.

[0050] In order to ensure the effect of the phase change tube 29 in absorbing heat, a storage cavity is provided at the rear of the ultraviolet lamp tube on the drying rack. The phase change tube 29 can be provided in plurality, and a plurality of phase change tubes 29 are installed in the storage cavity. After the phase change tube 29 absorbs heat, the corresponding position of the upper end of the water tank 32 is provided with an opening. Therefore, after the phase change tube 29 is transported into the water tank 32, the phase change material in the phase change tube 29 begins to release heat, and the water in the water tank 32 begins to heat up. The water pump 33 is installed in the water tank 32, and a water pipe 34 connects the water tank 32 with the water outlet of the drying box 31. One end of another water pipe 34 is connected to the output end of the water pump 33, and the other end of the corresponding water pipe 34 is connected to the water inlet end of the drying box 31. Therefore, after the water in the water tank 32 is heated by the phase change tube 29, the water in the water tank 32 is pumped into the drying box 31. Figure 2 The middle dotted line is the circulation roller 28 guiding the white card paper to the position where it fits with the drying box 31. The circulation roller 28 moves downward and transports the opposite side of the white card paper ink to the side wall of the drying box 31 for fitting. Of course, the guide roller can also be used to ensure that most of the white card paper fits with the side wall of the drying box 31. Under the action of the hot water in the drying box 31, the ink can be dried quickly and evenly. When the circulation roller 28 moves to the bottom, the corresponding detection device can also be set at a position close to the circulation roller 28 in this embodiment, and the ink can be detected again. However, in the actual working condition of this embodiment, only a small part of the ink is not dried. Therefore, this embodiment is set to dry the ink under the drying effect of the drying box 31.

[0051] Reference Figure 2 and Figure 3The cleaning component includes a traction part for pulling the marking film 4, a cleaning box 8, cleaning cotton 9 and an extrusion part for squeezing the cleaning cotton 9. The cleaning box 8 is fixed below the marking film 4 and has an opening at the upper end thereof. The cleaning cotton 9 is made of sponge. The thickness of the cleaning cotton 9 is greater than the depth of the inner cavity of the cleaning box 8. The horizontal cross-sectional dimension of the cleaning cotton 9 is smaller than the cross-sectional dimension of the cleaning box 8. The cleaning box 8 is filled with a cleaning agent for cleaning the ink on the marking film 4. In this embodiment, the cleaning agent can be either white vinegar or alcohol. The marking film 4 is in contact with the upper end of the cleaning cotton 9. Since the elastic rope 3 is located below the marking film 4, the elastic rope 3 can be cleaned while the marking film 4 is being cleaned.

[0052] The traction part includes two traction rollers 10, two traction motors, an extrusion rope 11, a plurality of guide rollers and an extrusion block 12. The two traction rollers 10 are rotatably arranged on both sides of the bracket 2, and the two traction motors respectively control the rotation of the two traction rollers 10. The two ends of the identification film 4 are respectively fixedly connected to the peripheral walls of the two traction rollers 10, one end of the extrusion rope 11 is fixedly connected to the extrusion block 12, and the other end of the extrusion rope 11 is fixedly connected to the outer wall of the traction roller 10 away from the cleaning box 8. The extrusion rope 11 and the traction roller 10 corresponding to the identification film 4 are synchronously wound or released, that is, the extrusion rope 11 and the corresponding end of the identification film 4 are simultaneously wound by the traction roller 10 or simultaneously released from the traction roller 10, and the plurality of guide rollers guide the extrusion block 12 to the top of the cleaning box 8, and the extrusion block 12 is vertically arranged above the cleaning box 8. The extrusion block 12 moves toward the top of the cleaning cotton 9 by automatic gravity, and the extrusion rope 11 will not interfere with the operation of the color sensor 5.

[0053] Reference Figure 2 and Figure 3 When ink adheres to the marking film 4 and needs to be cleaned, the traction roller 10 without the squeezing rope 11 is controlled to start winding the marking film 4. In this embodiment, it is set that only when the squeezing block 12 moves to squeeze the marking film 4 and the elastic rope 3 to abut against the cleaning cotton 9 and the cleaning cotton 9 is squeezed and deformed, the position with ink on the marking film 4 moves to the cleaning cotton 9 position. Therefore, as the marking film 4 is continuously wound, the traction roller 10 connected with the squeezing rope 11 continuously releases the marking film 4 and the squeezing rope 11 until all the positions on the marking film 4 with ink adhered pass through the cleaning cotton 9, then the winding of the marking film 4 is stopped, and then the marking film 4 starts to move in the opposite direction, that is, the traction roller 10 connected with the squeezing rope 11 starts to wind the marking film 4 and the squeezing rope 11 at the same time. Similarly, when the marking film 4 originally adhered to ink moves to the specified position, the squeezing block 12 is pulled to a position away from the cleaning cotton 9 to achieve the cleaning of the marking film 4 and the elastic rope 3.

[0054] Reference Figure 2 and Figure 3The color-changing component includes a light source 6 and a reflector 7 fixed on the bracket 2. The reflector is fixed on the bracket 2 and the reflected light of the light source 6 on the reflector 7 is located at a position on the identification film 4 that is directly opposite to the color sensor 5. The light source 6 has a reflection angle with the horizontal plane, and the reflection angle must ensure that the light of the light source 6 is emitted to the position mapped by the color sensor 5 on the identification film 4, so as to detect whether the identification film 4 is clean. In this embodiment, the color sensor 5 can also identify the color after the optical color-changing ink, and the color sensor 5 is also connected to a buzzer through the control of the PLC controller, that is, the ink emits a buzzer after encountering the light source 6. After defecation, the color sensor 5 recognizes the corresponding color and triggers the buzzer to start alarming. It can also detect whether the identification film 4 is cleaned. When the identification film 4 is cleaned, the light source 6 is turned on. The light source 6 emits light to the bottom of the color sensor 5 through the transmitting mirror. At this time, the movement of the identification film 4 can be controlled, and the squeezing block 12 does not need to squeeze the cleaning cotton 9. During the movement of the identification film 4, if the buzzer does not make a sound, it proves that the identification film 4 is cleaned. If the buzzer starts to make a sound, it proves that the identification film 4 needs to be cleaned again. During this process, the color sensor 5 will not trigger the movement of the circulation roller 28.

[0055] The implementation principle of the method for preparing a solvent-free composite positioning anti-counterfeiting transfer paper in the embodiment of the present application is as follows: the identification film 4 is deformed under the action of the deformation rod 14. When the deformation rod 14 needs to be triggered to return to its initial position, the power block 20 is driven by the power member 21 to move downward and the power block 20 abuts against the end of the driving block 16. The power block 20 squeezes the driving block 16 toward the plug hole 19 until the driving block 16 is completely moved into the plug hole 19. Under the elastic force of the first spring 24, the deformation rod 14 is pulled back to the initial position, the deformation rod 14 and the elastic rope 3 are deformed, and the elastic rope 3 moves toward the white cardboard. If the ink on the white card paper is not completely dried, at the moment when the elastic rope 3 contacts the ink on the white card paper, the elastic rope 3 contacts the ink on the white card paper and the ink adheres to the outer wall of the elastic rope 3, and due to the elastic force and inertia of the elastic rope 3, the elastic rope 3 also moves toward the direction of the identification film 4. When there is ink adhering to the identification film, since the identification film 4 is transparent and the recognition range of the color sensor 5 is limited, it is necessary to pull the identification film 4 during the movement, and the color sensor 5 recognizes the ink on the identification film 4; when the color sensor 5 recognizes that there is ink adhering to the identification film 4, the ink on the white card paper needs to be dried again.

[0056] The circulation roller 28 moves downward and transports the opposite side of the white card paper ink to the side wall of the drying box 31 for adhesion. Of course, the guide roller can also be used to ensure that most of the area of ​​the white card paper is in contact with the side wall of the drying box 31. Under the action of hot water in the drying box 31, the ink can be dried quickly and evenly.

[0057] When ink adheres to the marking film 4 and needs to be cleaned, the traction roller 10 not connected with the squeezing rope 11 is controlled to start winding the marking film 4. In this embodiment, it is set that only when the squeezing block 12 moves to squeeze the marking film 4 and the elastic rope 3 to abut against the cleaning cotton 9 and the cleaning cotton 9 is squeezed and deformed, the position with ink on the marking film 4 moves to the cleaning cotton 9 position. Therefore, as the marking film 4 is continuously wound, the traction roller 10 connected with the squeezing rope 11 continuously releases the marking film 4 and the squeezing rope 11 until all the positions on the marking film 4 with ink adhered pass through the cleaning cotton 9, then the winding of the marking film 4 is stopped, and then the marking film 4 starts to move in the opposite direction, that is, the traction roller 10 connected with the squeezing rope 11 starts to wind the marking film 4 and the squeezing rope 11 at the same time. Similarly, when the marking film 4 originally adhered to ink moves to the specified position, the squeezing block 12 is pulled to a position away from the cleaning cotton 9 to achieve the cleaning of the marking film 4 and the elastic rope 3.

[0058] Embodiment 2

[0059] The present application embodiment discloses a solvent-free composite positioning anti-counterfeiting transfer paper. Figure 1 A solvent-free composite positioning anti-counterfeiting transfer paper is prepared by the method in Example 1, which has the purpose of reducing costs, saving energy consumption, reducing VOCs emissions, and being more environmentally friendly. In addition, through the improvement of solvent-free composite equipment, the composite production of positioning transfer paper can be realized, and at the same time, paper anti-counterfeiting coating can be realized, thereby increasing the anti-counterfeiting performance of the product and achieving multiple anti-counterfeiting.

[0060] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for preparing a solvent-free composite positioning anti-counterfeiting transfer paper, characterized in that: The steps include: Generating a transfer film: after the PET positioning transfer film is stretched to a fixed length, a solvent-free adhesive is coated on the film to obtain a transfer film having an adhesive layer on the surface; Generating white card paper: coating the surface of white card paper with optical color-changing ink, and obtaining white card paper with an anti-counterfeiting layer on the surface after drying; White card paper drying test: Dry the ink on the white card paper. If it is not dried, the ink on the white card paper needs to be circulated and dried; Compounding: laminating the transfer film on the white cardboard so that the adhesive layer of the transfer film is in direct contact with the anti-counterfeiting layer of the white cardboard, and performing compounding treatment on the laminating transfer film and the white cardboard to obtain compound paper; Finished product: after the composite paper is aged, the PET base film on the composite paper is peeled off to obtain the solvent-free composite positioning anti-counterfeiting transfer paper; In S3, the white card paper is dried by the drying device (1), the ink on the white card paper is detected by the detection device, and the ink on the white card paper is circulated and dried by the circulation device; The detection device comprises a bracket (2) which is lifted and arranged above the drying device (1), an elastic rope (3) for detecting whether the ink is dry, a winding assembly for winding the elastic rope (3), an identification mechanism for identifying whether the elastic rope (3) is adhered to ink, and a deformation mechanism for deforming the elastic rope (3); the bracket (2) is provided with a plurality of guide rollers for guiding the white card paper to the composite process, and the length direction of the elastic rope (3) is arranged along the axis direction of the guide roller; the identification mechanism comprises an identification film (4), a color sensor (5), a cleaning assembly for cleaning the identification film (4), and a color change assembly for calibrating the ink; the identification film (4) is movably arranged in the bracket (2) and the movement direction of the identification film (4) is consistent with the movement direction of the elastic rope (3); the identification film (4) is arranged above the elastic rope (3); the The color sensor (5) is mounted on the bracket (2) and is located above the identification film (4); the identification film (4) is transparent and the color sensor (5) identifies the ink color after passing through the identification film (4); the color change component comprises a light source (6) and a reflector (7) fixed on the bracket (2); the reflector is fixed on the bracket (2) and the reflected light of the light source (6) on the reflector (7) is located at a position on the identification film (4) directly facing the color sensor (5); the deformation mechanism comprises a support frame (13) fixed on the drying device (1), a deformation rod (14) elastically arranged on the support frame (13) and a trigger component for triggering the deformation rod (14) to retract; the movement direction of the deformation rod (14) is arranged along the axis direction of the guide roller; the deformation rod (14) is located below the elastic rope (3) and does not abut against the white card paper.

2. The method for preparing a solvent-free composite positioning anti-counterfeiting transfer paper according to claim 1, characterized in that: The cleaning component comprises a traction part for pulling the marking film (4), a cleaning box (8), cleaning cotton (9) and an extrusion part for squeezing the cleaning cotton (9); the cleaning box (8) is fixed below the marking film (4) and the upper end of the cleaning box (8) is opened; the cleaning cotton (9) is fixed in the cleaning box (8); the cleaning box (8) is filled with a cleaning agent for cleaning the ink of the marking film (4); the marking film (4) abuts against the upper end of the cleaning cotton (9).

3. The method for preparing a solvent-free composite positioning anti-counterfeiting transfer paper according to claim 2, characterized in that: The traction part comprises two traction rollers (10), two traction motors, an extrusion rope (11), a plurality of guide rollers and an extrusion block (12); the two traction rollers (10) are rotatably arranged on both sides of the bracket (2); the two traction motors respectively control the rotation of the two traction rollers (10); the two ends of the identification film (4) are respectively fixedly connected to the peripheral walls of the two traction rollers (10); one end of the extrusion rope (11) is fixedly connected to the extrusion block (12); the other end of the extrusion rope (11) is fixedly connected to the outer wall of the traction roller (10) away from the cleaning box (8); the extrusion rope (11) and the identification film (4) are synchronously wound or released corresponding to the traction roller (10); and the plurality of guide rollers guide the extrusion block (12) to be directly above the cleaning box (8).

4. The method for preparing a solvent-free composite positioning anti-counterfeiting transfer paper according to claim 3, characterized in that: The trigger assembly comprises a sleeve (15) fixed on the support frame (13), a driving block (16), a plug-in block (17), a power block (20) abutting against the driving block (16), a power member (21) for driving the power block (20) to reciprocate, a trigger block (22) and a driving member (23) for driving the trigger block (22) to move, a side wall of the deformable rod (14) is provided with a sliding groove (18), and the plug-in block (17) is elastically arranged on the side wall of the deformable rod (14). In the slide groove (18), a plug-in hole (19) for plugging the plug-in block (17) is arranged on the side wall of the sleeve (15), the driving block (16) slides in the plug-in hole (19), the length dimension of the driving block (16) is equal to the depth dimension of the plug-in hole (19), the trigger block (22) is fixedly connected to the side wall of the deformation rod (14) located outside the sleeve (15), and the output end of the driving member (23) abuts against the trigger block (22).

5. The method for preparing a solvent-free composite positioning anti-counterfeiting transfer paper according to claim 4, characterized in that: The circulation device comprises a circulation frame (26) which is lifted and lowered on the bracket (2), a reciprocating member (27) for realizing the reciprocating motion of the circulation frame (26), a circulation roller (28) which is rotatably arranged on the circulation frame (26), a phase change tube (29) for absorbing heat from the drying device (1), and a drying mechanism for drying the ink again, wherein the circulation roller (28) is arranged between the composite device and the drying device (1), the circulation roller (28) guides the white card paper to the drying mechanism for drying again, and the reciprocating member (27) is electrically connected to the color sensor (5).

6. The method for preparing a solvent-free composite positioning anti-counterfeiting transfer paper according to claim 5, characterized in that: The drying mechanism comprises a water tank (32), a lifting assembly (30) for controlling the movement of the phase change tube (29), a drying box (31), a water pump (33) for realizing water circulation between the water tank (32) and the drying box (31), and two water pipes (34); the water tank (32) is located below the phase change tube (29); the water pump (33) is arranged in the water tank (32); the water pipe (34) connects the water tank (32) and the water outlet of the drying box (31); one end of the other water pipe (34) is connected to the water pump (33); the other end of the water pipe (34) is connected to the water inlet of the drying box (31); and the phase change tube (29) is filled with a phase change material for absorbing and releasing heat.

7. A solvent-free composite positioning anti-counterfeiting transfer paper, characterized in that: The invention is prepared by the method for preparing the solvent-free composite positioning anti-counterfeiting transfer paper according to any one of claims 1 to 6.

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