Mobile label capable of being pasted with suspension microspheres again

Abstract

The invention provides a restickable suspension microsphere mobile label, and relates to the technical field of label production, the restickable suspension microsphere mobile label comprises bottom paper and surface paper, and the bottom paper and the surface paper are bonded through a microsphere pressure-sensitive adhesive. The suspension microsphere pressure-sensitive adhesive is adopted as the adhesive, the problem that the label is difficult to strip along with the change of time, temperature and humidity is avoided, the suspension microsphere pressure-sensitive adhesive is distributed on the surface of the base material in a point shape, microspheres have certain elasticity, once pressure is applied, the microspheres become cake-shaped and bounce after being stripped, and the problem that the label is difficult to strip along with the time is avoided. The adhesive tape can be adhered to a base material more and more firmly along with changes of temperature and humidity, the surface of the adhered base material cannot be damaged during stripping, no residual adhesive is left on the adhered base material, and the adhesive tape can be repeatedly adhered and used for multiple times.

Description

Technical Field

[0001] The invention relates to the technical field of label production, in particular to a reattachable suspended microsphere mobile label. Background Art

[0002] Self-adhesive labels were invented in the 1930s and have a history of nearly 100 years. With the development of modern industry and the improvement of people's living standards, the application and demand of self-adhesive labels are constantly increasing, new application scenarios are constantly emerging, and they are widely used in various industries and fields. At present, the demand for self-adhesive labels in China is growing at a rate of more than 20% per year, and the market potential is huge.

[0003] There are two types of self-adhesive labels according to the characteristics of the adhesive. The first type is permanent self-adhesive material. This type of label is difficult to remove after being affixed and is often used in scenarios that require long-term fixed affixation. The second type is removable self-adhesive material, that is, the label can be removed without leaving any traces, and is suitable for scenarios that require frequent label replacement.

[0004] However, existing removable self-adhesive labels, such as removable labels on items purchased by consumers, will have the problem of being unable to tear off or damaging the substrate of the attached object (such as paper, tableware, cooking utensils, kitchen utensils and other household items) as the manufacturer's affixed labels are extended and the temperature and humidity change. This brings serious troubles to people's lives. Summary of the invention

[0005] The invention provides a reattachable suspended microsphere mobile label, which is used to solve the defect of the existing removable self-adhesive label in the prior art that it is difficult to completely peel off with the extension of sticking time and the change of temperature and humidity.

[0006] In one aspect, the present invention provides a re-stickable suspended microsphere mobile label, comprising a base paper and a surface paper, wherein the base paper and the surface paper are bonded by a suspended microsphere pressure-sensitive adhesive.

[0007] Preferably, the suspended microsphere pressure-sensitive adhesive is a dot-shaped adhesive, and the particle size of the microspheres ranges from 50um to 60um.

[0008] Preferably, the suspended microsphere pressure-sensitive adhesive is prepared based on the following method, comprising:

[0009] Step 1: Add 43% pure water, 2% initiator, 5% suspending agent and 3% surfactant to 47% reaction monomers, and disperse for one hour. The reaction monomers include isooctyl acrylate, methyl methacrylate, acrylic acid and glycidyl methacrylate;

[0010] Step 2: After dispersion is completed, heat to 85°C and react for 2-3 hours, then naturally cool to room temperature and add thickener and defoamer.

[0011] On the other hand, the present invention also provides a re-stickable suspended microsphere mobile label preparation device for manufacturing the above-mentioned re-stickable suspended microsphere mobile label, including a working base, and the upper surface of the working base is provided with a unwinding component 1, a gravure coating component, a drying box, an unwinding component 2, a bonding component and a winding component from left to right in sequence, the unwinding component 1 is used to install the base paper roll, the unwinding component 2 is used to install the surface paper roll, the bonding component is used to complete the bonding of the base paper and the surface paper, and the winding component is used to complete the winding of the substrate roll.

[0012] Preferably, the bonding component includes a driving box, which is fixedly connected to the upper surface of the working base, a sliding groove is provided on the side wall of the driving box, a lifting track is fixedly connected to the inner bottom surface of the driving box, a motor 1 is installed in the lifting track, the output end of the motor 1 is fixedly connected to a vertically arranged screw, a lifting plate is threadedly connected to the screw, a motor 2 is fixedly connected to the upper surface of the lifting plate, the output end of the motor 2 is fixedly connected to an output shaft 1, the other end of the output shaft 1 is fixedly connected to an extrusion roller 1, the output shaft 1 extends out of the sliding groove 1, the inner wall of the driving box is also fixedly connected to a mounting plate, the upper surface of the mounting plate is fixedly connected to a motor 3, the output end of the motor 3 is fixedly connected to the output shaft 2, the other end of the output shaft 2 is fixedly connected to the extrusion roller 2, the output shaft 2 rotates and passes through the side wall of the driving box, and the rotation directions of the extrusion roller 1 and the extrusion roller 2 are opposite.

[0013] Preferably, the outlet of the drying box is also fixedly connected to a detection box, the bottom of the detection box is installed with a camera assembly, the camera assembly is used to capture the actual image of the coated surface of the base paper, and the bottom of the detection box is also evenly distributed with a number of lighting sources.

[0014] Preferably, a quality assessment system is also included, and the quality assessment system includes:

[0015] An image acquisition module, used for periodically acquiring a number of actual images of the coated surface of the base paper as evaluation images;

[0016] An image processing module, used for enhancing the evaluation image;

[0017] A contour extraction module is used to extract the contours of all suspended microsphere pressure-sensitive adhesive colloids on the evaluation image;

[0018] A quality assessment module, used for calculating quality assessment parameters, and obtaining quality assessment results based on the quality assessment parameters, wherein the quality assessment results include poor coating quality and good coating quality;

[0019] Alarm module, when the quality assessment result is that the coating quality is poor, the coating is stopped and an alarm is issued.

[0020] Preferably, the profile of the suspended microsphere pressure-sensitive adhesive colloid includes: an original profile and an approximate profile, and the profile extraction module includes:

[0021] An original contour extraction unit is used to extract the original contour of the suspended microsphere pressure-sensitive adhesive colloid, and determine the original image of each suspended microsphere pressure-sensitive adhesive colloid based on the original contour of each suspended microsphere pressure-sensitive adhesive colloid;

[0022] The contour approximation unit is used to approximate the original contour of the suspended microsphere pressure-sensitive adhesive colloid to a circular approximate contour.

[0023] Preferably, the quality assessment module includes:

[0024] Lux meter, used to obtain the actual brightness inside the drying box;

[0025] A parameter calculation unit, used for calculating quality assessment parameters;

[0026]

[0027] Where P is the quality evaluation parameter; M is the total number of evaluation images; α and β are the weighted coefficients of coating thickness and coating shape, respectively, α+β=1; τ is the uniformity conversion coefficient; H im is the average gray value of the original image with the largest average gray value in the i-th evaluation image; H ix is the average gray value of the original image with the smallest average gray value in the i-th evaluation image; H0 is the unit gray value; N i is the total number of original images in the i-th evaluation image; H ij is the average gray value of the jth original image in the i-th evaluation image; H b is the gray value corresponding to the evaluation image when the coating thickness is the standard coating thickness; ln is the logarithmic function with e as the base; e is a natural constant; L s is the actual brightness inside the drying box; L b is the preset standard brightness inside the drying box; L0 is the unit brightness value; S is the preset maximum allowable shape deviation rate; C ij is the degree of overlap between the jth original contour and the fitted contour in the i-th evaluation image; R ij is the diameter of the jth fitted contour in the i-th evaluation image; R b is the preset standard diameter of the fitting profile; | | is the absolute value symbol; is the rounding symbol;

[0028] A result output unit, used to determine and output the quality assessment result;

[0029] When the quality assessment parameter is greater than a preset quality assessment threshold, the quality assessment result is poor coating quality;

[0030] Otherwise, the quality assessment result is that the coating quality is good.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] Using suspended microsphere pressure-sensitive adhesive as an adhesive will not cause the problem of difficult label peeling as time goes by or changes in temperature or humidity. The suspended microsphere pressure-sensitive adhesive is distributed in a dotted manner on the surface of the substrate, and the microspheres have a certain elasticity. Once pressure is applied, the microspheres become pancake-shaped and bounce back after peeling. The adhesion to the substrate will not become increasingly strong as time goes by or changes in temperature or humidity. The surface of the substrate will not be damaged during peeling, and no residual adhesive will be left on the substrate. The label can be repeatedly pasted and used many times. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a structural schematic diagram of the device for preparing the reattachable suspended microsphere mobile label of the present invention;

[0035] Figure 2 yes Figure 1 The enlarged schematic diagram at A in the middle;

[0036] Figure 3 It is a structural schematic diagram of the laminating components of the device for preparing the re-attachable suspended microsphere mobile label of the present invention.

[0037] Reference numerals:

[0038] 1. Work base; 2. Unwinding component 1; 3. Gravure coating component; 4. Drying box; 5. Unwinding component 2; 6. Laminating component; 7. Winding component; 8. Driving box; 9. Sliding slot; 10. Lifting track; 11. Motor 1; 12. Screw; 13. Lifting plate; 14. Motor 2; 15. Output shaft 1; 16. Squeeze roller 1; 17. Mounting plate; 18. Motor 3; 19. Output shaft 2; 20. Squeeze roller 2; 21. Inspection box; 22. Camera component; 23. Light source. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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.

[0040] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0041] Example 1

[0042] The embodiment of the present invention provides a re-attachable suspended microsphere mobile label, comprising a base paper and a surface paper, wherein the base paper and the surface paper are bonded by a suspended microsphere pressure-sensitive adhesive.

[0043] Preferably, the suspended microsphere pressure-sensitive adhesive is a dot-shaped adhesive, and the particle size of the microspheres ranges from 50um to 60um.

[0044] Preferably, the suspended microsphere pressure-sensitive adhesive is prepared based on the following method, comprising:

[0045] Step 1: Add 43% pure water, 2% initiator, 5% suspending agent and 3% surfactant to 47% reaction monomers, and disperse for one hour. The reaction monomers include isooctyl acrylate, methyl methacrylate, acrylic acid and glycidyl methacrylate;

[0046] Step 2: After dispersion is completed, heat to 85°C and react for 2-3 hours, then naturally cool to room temperature and add thickener and defoamer.

[0047] In this embodiment, the Tg value of the microspheres of the suspended microsphere pressure-sensitive adhesive is -50°C.

[0048] The beneficial effects of the above technical solution are:

[0049] Suspended microsphere pressure-sensitive adhesive is made of acrylic ester monomers, which are dispersed into tiny droplets in pure water with the help of suspending agents and redox initiators. It has the characteristics of strong viscosity and strong cohesion.

[0050] Using suspended microsphere pressure-sensitive adhesive as an adhesive will not cause the problem of difficulty in label peeling as time goes by or changes in temperature or humidity. The suspended microsphere pressure-sensitive adhesive is attached to the substrate in a dotted manner, and the microspheres have a certain elasticity. Once pressure is applied, the microspheres become pancake-shaped and then bounce slightly. The adhesion to the substrate will not become increasingly strong as time goes by or changes in temperature or humidity. The surface of the substrate will not be damaged during peeling, and no residual adhesive will be left on the substrate.

[0051] Comparison of peeling force data: the peeling force of ordinary self-adhesive is about 13-25N, the peeling force of removable self-adhesive is about 8N, and the peeling force of self-adhesive made of microsphere adhesive is about 4N, as shown in Table 1:

[0052] Product Categories Coating method form Peel force (N / 25mm) Ordinary pressure sensitive adhesive label Roller coating Planar film distribution 12-25 Existing removable pressure-sensitive adhesive labels on the market Roller coating Planar film distribution 8 Microsphere pressure sensitive adhesive label Screen transfer coating Block point distribution 4

[0053] Table 1

[0054] It can be seen that the present invention will not damage the surface of the attached substrate when peeling, and will not leave any residual adhesive on the attached substrate, and can be repeatedly attached and used multiple times.

[0055] Example 2

[0056] The embodiment of the present invention provides a re-stickable suspended microsphere mobile label preparation device, which is used to manufacture a re-stickable suspended microsphere mobile label as described in Example 1, including a working base 1, and the upper surface of the working base 1 is provided with a rewinding component 2, a gravure coating component 3, a drying box 4, an unwinding component 2 5, a bonding component 6 and a winding component 7 from left to right. The unwinding component 2 is used to install a base paper roll, the unwinding component 2 5 is used to install a surface paper roll, the bonding component 6 is used to complete the bonding of the base paper and the surface paper, and the winding component 7 is used to complete the winding of the substrate roll.

[0057] The beneficial effects of the above technical solution are:

[0058] When preparing the label, the glassine base paper roll is installed on the unwinding component 1 2, and the face paper roll is installed on the unwinding component 2 5. First, the glassine base paper roll is released by the unwinding component 1 2, and the suspended microsphere pressure-sensitive adhesive is coated on the glassine base paper by the gravure coating component 3, and the coating amount is 10-20g / m 2 , then the glassine base paper tape is dried through a drying box 4, and then the glassine base paper and the surface paper are bonded at the laminating component 6 to obtain a finished substrate, and finally the finished label is obtained by printing and die-cutting the finished substrate.

[0059] Example 3

[0060] On the basis of Example 2, the bonding component 6 includes a driving box 8, which is fixedly connected to the upper surface of the working base 1. The side wall of the driving box 8 is provided with a sliding groove 9. The inner bottom surface of the driving box 8 is fixedly connected to a lifting track 10. A motor 11 is installed in the lifting track 10. The output end of the motor 11 is fixedly connected to a vertically arranged screw 12. A lifting plate 13 is threadedly connected to the screw 12. The upper surface of the lifting plate 13 is fixedly connected to a motor 2 14. The output end of the motor 2 14 is fixedly connected to an output shaft 15. The other end of the output shaft 15 is fixedly connected to an extrusion roller 16. The output shaft 15 extends from the sliding groove 9. The inner wall of the driving box 8 is also fixedly connected to a mounting plate 17. The upper surface of the mounting plate 17 is fixedly connected to a motor 3 18. The output end of the motor 3 18 is fixedly connected to an output shaft 2 19. The other end of the output shaft 2 19 is fixedly connected to an extrusion roller 2 20. The output shaft 2 19 rotates through the side wall of the driving box 8. The rotation directions of the extrusion roller 16 and the extrusion roller 2 20 are opposite.

[0061] In this embodiment, the unwinding assembly 1 2, the unwinding assembly 2 5 and the winding assembly 7 have the same structure and are prior art, such as an unwinding device in a film fixed-length stretching device disclosed in CN222039576U.

[0062] In this embodiment, the gravure coating assembly 3 is a prior art, such as a gravure coating mechanism with adjustable coating amount disclosed in CN221360741U.

[0063] The beneficial effects of the above technical solution are:

[0064] By controlling the lifting track 10, the lifting plate 13 is lifted and lowered, thereby realizing the control of the up and down movement of the squeezing roller 16, thereby realizing the control of the laminating squeezing force, and by the opposite rotation of the squeezing roller 16 and the squeezing roller 2 20, the smoothness of the passage of the glassine base paper and the face paper is improved, and wrinkles of the glassine base paper and the face paper during the laminating process are avoided.

[0065] Example 4

[0066] On the basis of any one of Examples 2-3, a detection box 21 is also fixedly connected to the outlet of the drying box 4, and a camera assembly 22 is installed on the inner bottom surface of the detection box 21. The camera assembly 22 is used to capture the actual image of the coated surface of the base paper. A number of lighting sources 23 are also evenly distributed on the inner bottom surface of the detection box 21.

[0067] Preferably, a quality assessment system is also included, and the quality assessment system includes:

[0068] An image acquisition module, used for periodically acquiring a number of actual images of the coated surface of the base paper as evaluation images;

[0069] An image processing module, used for enhancing the evaluation image;

[0070] A contour extraction module is used to extract the contours of all suspended microsphere pressure-sensitive adhesive colloids on the evaluation image;

[0071] A quality assessment module, used for calculating quality assessment parameters, and obtaining quality assessment results based on the quality assessment parameters, wherein the quality assessment results include poor coating quality and good coating quality;

[0072] Alarm module, when the quality assessment result is that the coating quality is poor, the coating is stopped and an alarm is issued.

[0073] Preferably, the profile of the suspended microsphere pressure-sensitive adhesive colloid includes: an original profile and an approximate profile, and the profile extraction module includes:

[0074] An original contour extraction unit is used to extract the original contour of the suspended microsphere pressure-sensitive adhesive colloid, and determine the original image of each suspended microsphere pressure-sensitive adhesive colloid based on the original contour of each suspended microsphere pressure-sensitive adhesive colloid;

[0075] The contour approximation unit is used to approximate the original contour of the suspended microsphere pressure-sensitive adhesive colloid to a circular approximate contour.

[0076] Preferably, the quality assessment module includes:

[0077] Lux meter, used to obtain the actual brightness inside the drying box;

[0078] A parameter calculation unit, used for calculating quality assessment parameters;

[0079]

[0080] Where P is the quality evaluation parameter; M is the total number of evaluation images; α and β are the weighted coefficients of coating thickness and coating shape, respectively, α+β=1; τ is the uniformity conversion coefficient; H im is the average gray value of the original image with the largest average gray value in the i-th evaluation image; H ix is the average gray value of the original image with the smallest average gray value in the i-th evaluation image; H0 is the unit gray value; N i is the total number of original images in the i-th evaluation image; H ij is the average gray value of the jth original image in the i-th evaluation image; H b is the gray value corresponding to the evaluation image when the coating thickness is the standard coating thickness; ln is the logarithmic function with e as the base; e is a natural constant; L s is the actual brightness inside the drying box; L b is the preset standard brightness inside the drying box; L0 is the unit brightness value; S is the preset maximum allowable shape deviation rate; Cij is the degree of overlap between the jth original contour and the fitted contour in the i-th evaluation image; R ij is the diameter of the jth fitted contour in the i-th evaluation image; R b is the preset standard diameter of the fitting profile; | | is the absolute value symbol; is the rounding symbol;

[0081] A result output unit, used to determine and output the quality assessment result;

[0082] When the quality assessment parameter is greater than a preset quality assessment threshold, the quality assessment result is poor coating quality;

[0083] Otherwise, the quality assessment result is that the coating quality is good.

[0084] In this embodiment, the original contour is the actual outer contour of the suspended microsphere pressure-sensitive adhesive colloid in the evaluation image;

[0085] In this embodiment, the original image is an actual image of the area surrounded by the original outline of the suspended microsphere pressure-sensitive adhesive colloid;

[0086] In this embodiment, the original image, the original contour and the fitted contour have a one-to-one correspondence, and the total number of groups of the original image, the original contour and the fitted contour in the i-th evaluation image is N. i .

[0087] In this embodiment, the shape deviation rate is the degree of shape deviation generated in each original image.

[0088] In this embodiment, the uniformity conversion coefficient is a conversion coefficient based on the grayscale value deviation of the image converted into the coating uniformity. The uniformity conversion coefficient is obtained based on the experimental data fitting of the simulation experiment, and the value range is greater than 0 and less than 1.

[0089] In this embodiment, the degree of overlap between the original contour and the fitted contour is the ratio of the overlapped portion of the original contour and the fitted contour to the original contour.

[0090] The beneficial effects of the above technical solution are:

[0091] By setting up the detection box 21, after the glassine base paper tape is dried, the coating effect of the suspended microsphere pressure-sensitive adhesive is detected and evaluated by regularly acquiring a number of evaluation images, thereby ensuring a good coating effect and avoiding a decrease in the adhesion of the label due to a poor coating effect. By setting up the lighting source 23, the brightness of the image acquired by the camera component 22 is guaranteed to be stable, thereby improving the accuracy of the evaluation result.

[0092] When calculating the quality evaluation parameters, the comprehensiveness of the evaluation results is improved by comprehensively considering various data of coating thickness, coating uniformity and coating shape. The grayscale value of each original image is obtained and the degree of coating thickness deviation is reflected by the grayscale value of the original image, thereby achieving accurate evaluation of coating thickness and coating uniformity. The original contour is approximated to a circular approximate contour, so that the size deviation of each coating point can be intuitively reflected. By considering the overlap between the original contour and the fitting contour, the shape regularity of each coating point can be judged, and then correction is made according to the proportion of qualified coating points, thereby achieving accurate evaluation of the coating shape (size of the coating point, shape of the outer contour).

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Re-attachable suspended microsphere mobile label, characterized in that: It includes base paper and face paper, and the base paper and the face paper are bonded by coating suspended microsphere pressure-sensitive adhesive.

2. The re-stickable suspended microsphere mobile label according to claim 1, characterized in that: The suspended microsphere pressure-sensitive adhesive is a dot-shaped adhesive with a particle size range of 50um-60um.

3. The re-stickable suspended microsphere mobile label according to claim 2, characterized in that: The suspended microsphere pressure-sensitive adhesive is prepared based on the following method, including: Step 1: Add 43% pure water, 2% initiator, 5% suspending agent and 3% surfactant to 47% reaction monomers, and disperse for one hour. The reaction monomers include isooctyl acrylate, methyl methacrylate, acrylic acid and glycidyl methacrylate; Step 2: After dispersion is completed, heat to 85°C, react for 2-3 hours, and then naturally cool to room temperature, and add thickener and defoamer.

4. The re-stickable suspended microsphere mobile label according to claim 1, characterized in that: Also includes: A preparation device for preparing the re-attachable suspended microsphere mobile label comprises a working base (1), wherein the upper surface of the working base (1) is provided with a first unwinding component (2), a gravure coating component (3), a drying box (4), a second unwinding component (5), a laminating component (6) and a rewinding component (7) in sequence from left to right, wherein the first unwinding component (2) is used for installing a base paper roll, the second unwinding component (5) is used for installing a face paper roll, the laminating component (6) is used for completing the laminating of the base paper and the face paper, and the rewinding component (7) is used for completing the rewinding of the substrate roll.

5. The re-stickable suspended microsphere mobile label according to claim 4, characterized in that: The laminating component (6) comprises a driving box (8), the driving box (8) is fixedly connected to the upper surface of the working base (1), a sliding groove (9) is arranged on the side wall of the driving box (8), a lifting track (10) is fixedly connected to the inner bottom surface of the driving box (8), a motor 1 (11) is installed in the lifting track (10), the output end of the motor 1 (11) is fixedly connected to a vertically arranged screw rod (12), a lifting plate (13) is threadedly connected to the screw rod (12), a motor 2 (14) is fixedly connected to the upper surface of the lifting plate (13), and the output end of the motor 2 (14) is fixedly connected to an output shaft 1 ( 15), the other end of the output shaft one (15) is fixedly connected to a squeezing roller one (16), the output shaft one (15) extends out from a sliding groove (9), the inner wall of the driving box (8) is also fixedly connected to a mounting plate (17), the upper surface of the mounting plate (17) is fixedly connected to a motor three (18), the output end of the motor three (18) is fixedly connected to an output shaft two (19), the other end of the output shaft two (19) is fixedly connected to a squeezing roller two (20), the output shaft two (19) rotates through the side wall of the driving box (8), and the squeezing roller one (16) and the squeezing roller two (20) rotate in opposite directions.

6. The re-stickable suspended microsphere mobile label according to claim 4, characterized in that: The outlet of the drying box (4) is also fixedly connected to a detection box (21), the inner bottom surface of the detection box (21) is equipped with a camera assembly (22), the camera assembly (22) is used to capture the actual image of the coated surface of the base paper, and the inner bottom surface of the detection box (21) is also evenly distributed with a plurality of illumination light sources (23).

7. The re-stickable suspended microsphere mobile label according to claim 6, characterized in that: It also includes a quality assessment system, which includes: An image acquisition module, used for periodically acquiring a number of actual images of the coated surface of the base paper as evaluation images; An image processing module, used for enhancing the evaluation image; A contour extraction module is used to extract the contours of all suspended microsphere pressure-sensitive adhesive colloids on the evaluation image; A quality assessment module, used for calculating quality assessment parameters, and obtaining quality assessment results based on the quality assessment parameters, wherein the quality assessment results include poor coating quality and good coating quality; Alarm module, when the quality assessment result is that the coating quality is poor, the coating is stopped and an alarm is issued.

8. The re-stickable suspended microsphere mobile label according to claim 7, characterized in that: The contour of the suspended microsphere pressure-sensitive adhesive colloid includes: original contour and approximate contour, and the contour extraction module includes: An original contour extraction unit is used to extract the original contour of the suspended microsphere pressure-sensitive adhesive colloid, and determine the original image of each suspended microsphere pressure-sensitive adhesive colloid based on the original contour of each suspended microsphere pressure-sensitive adhesive colloid; The contour approximation unit is used to approximate the original contour of the suspended microsphere pressure-sensitive adhesive colloid to a circular approximate contour.

9. The re-stickable suspended microsphere mobile label according to claim 8, characterized in that: The quality assessment modules include: Lux meter, used to obtain the actual brightness inside the drying box; A parameter calculation unit, used for calculating quality assessment parameters; Where P is the quality evaluation parameter; M is the total number of evaluation images; α and β are the weighted coefficients of coating thickness and coating shape, respectively, α+β=1; τ is the uniformity conversion coefficient; H im is the average gray value of the original image with the largest average gray value in the i-th evaluation image; H ix is the average gray value of the original image with the smallest average gray value in the i-th evaluation image; H0 is the unit gray value; N i is the total number of original images in the i-th evaluation image; H ij is the average gray value of the jth original image in the i-th evaluation image; H b is the gray value corresponding to the evaluation image when the coating thickness is the standard coating thickness; ln is the logarithmic function with e as the base; e is a natural constant; L s is the actual brightness inside the drying box; L b is the preset standard brightness inside the drying box; L0 is the unit brightness value; S is the preset maximum allowable shape deviation rate; C ij is the degree of overlap between the jth original contour and the fitted contour in the i-th evaluation image; R ij is the diameter of the jth fitted contour in the i-th evaluation image; R b is the preset standard diameter of the fitting profile; | | is the absolute value symbol; is the rounding symbol; A result output unit, used to determine and output the quality assessment result; When the quality assessment parameter is greater than a preset quality assessment threshold, the quality assessment result is poor coating quality; Otherwise, the quality assessment result is that the coating quality is good.

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