Detection method and system for wall film preparation

Abstract

The invention relates to the technical field of indoor wall films, in particular to detection of wall film preparation, and provides a detection method and system for wall film preparation. The thickness of the adhesive layer of the wall film can be accurately determined according to the viscosity decline speed of the wall film, so that misjudgment of the adhesive of the adhesive layer of the wall film caused by the environmental humidity is reduced, and decline of the adhesive force of the adhesive of the adhesive layer caused by the environmental humidity is reduced; the viscosity of the wall pasting film is reduced, so that the wall pasting film has bubbles and is not flat; and meanwhile, the pressure of the laminating pressure roller can be accurately determined through the acquired defect area proportion of the wall sticker film, so that the occurrence of the conditions of bubbles and unevenness is reduced, and the detection accuracy of wall sticker preparation is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of indoor wall films, and in particular to a detection method and system for preparing wall films. Background Art

[0002] Wall stickers can effectively protect the wall, reduce daily wear, stains and scratches on the wall, and extend the service life of the wall. However, during the preparation of wall stickers, the humidity of the environment affects the curing effect of the adhesive layer, and the flattening, trimming and bubbles of the wall stickers will affect the accuracy of the preparation of the wall stickers. Therefore, it is becoming increasingly important to improve the accuracy of the preparation and testing of wall stickers.

[0003] The prior art publication number is CN 109532192B, which provides an automatic control film laminating machine, including a base, the left side of the base is fixedly connected to a column, the top of the column is fixedly connected to an operating platform, the column is fixedly connected to a fixed seat, the fixed seat is rotatably connected to a winding wheel, a film is provided on the outside of the winding wheel, and the left side of the operating platform is fixedly connected to a motor. The present invention can be used in the film laminating process in the wall sticker processing and production process, by setting a driving wheel and a glue coating wheel to form a transmission mechanism, the film is moved to the right by the transmission mechanism, and glue is applied to the bottom of the film during the movement, and a cam and a pressure plate are set to form a film laminating mechanism, and the film is pressed tightly on the top of the wall sticker by the film laminating mechanism, thereby completing the film laminating action, but does not involve the problem of low wall sticker preparation accuracy caused by environmental humidity. Summary of the invention

[0004] To this end, the present invention provides a detection method and system for wall film preparation, so as to overcome the problems in the prior art that the humidity of the test wall environment causes the viscosity of the wall film to decrease at an inconsistent rate, resulting in bubbles and unevenness in the wall film and low accuracy in the preparation of the wall film.

[0005] To achieve the above object, the present invention provides a method for detecting the preparation of a wall film, comprising:

[0006] Step S1, cleaning the test wall surface to be pasted with the film and detecting the ambient humidity in turn, and determining the viscosity reduction rate of the test wall film according to the ambient humidity;

[0007] Step S2, attaching the test wall film to the test wall surface to obtain the peeling force of the test wall film on the test wall surface;

[0008] Step S3, determining the residual adhesive force of the test wall film according to the peeling force of the test wall film and the adhesiveness reduction rate;

[0009] Step S4, judging whether the adhesive performance of the test wall film meets the standard according to the residual adhesive force;

[0010] Step S5: if it is determined that the adhesive performance of the test wall film does not meet the standard, the thickness of the adhesive layer of the wall film in the preparation process of the wall film is adjusted;

[0011] Step S6, using the wall film with adjusted thickness to adhere to the test wall again;

[0012] Step S7, detecting the defect area of ​​the wall film to calculate the defect area ratio;

[0013] Step S8: determining the pressure of the pressure roller for laminating according to the defect area ratio of the wall film.

[0014] Furthermore, the wall film is a layered structure, including a PCV film and an adhesive layer.

[0015] Further, the process of determining the viscosity reduction rate of the test wall film according to the ambient humidity includes:

[0016] Use a humidity sensor to collect the ambient humidity of the test wall;

[0017] Calculate the viscosity drop rate based on the ambient humidity of the test wall and the standard ambient humidity value.

[0018] Furthermore, the calculation formula for the residual adhesive force of the test wall film on the sampling day is:

[0019] θ=σ-ν×t0

[0020] Among them, θ is the residual adhesive force on the sampling day, σ is the initial peeling force, v is the viscosity decrease rate, and t0 is the preset number of days of use of the test wall film.

[0021] Further, judging whether the adhesive performance of the test wall film meets the standard according to the residual adhesive force includes:

[0022] Compare the remaining adhesive force of the wall film with the preset adhesive force;

[0023] If the residual adhesive force of the wall film is less than or equal to the preset adhesive force, it is determined that the adhesive performance of the wall film does not meet the standard.

[0024] Furthermore, the adjustment range of the thickness of the adhesive layer of the wall film is determined by the difference between the viscosity reduction speed of the wall film and a preset viscosity reduction speed.

[0025] Furthermore, it also includes a camera, which is used to collect images of the wall film on the test wall;

[0026] Detecting the defect area of ​​the wall film to calculate the defect area ratio includes:

[0027] The image of the wall film on the test wall is grayscaled and denoised;

[0028] Obtain the area of ​​the test wall film, the bubble area, and the non-bubble uneven area to determine the defect area ratio;

[0029] The defect area ratio is the ratio of the sum of the bubble area and the non-bubble uneven area of ​​the wall film to the total area of ​​the wall film.

[0030] Further, the pressure of the pressure roller is determined according to the defect area ratio of the wall film, including:

[0031] Compare the defect area ratio of the wall film with the preset defect area ratio;

[0032] If the defect area ratio of the wall film is greater than the preset defect area ratio, the pressure of the pressure roller is increased.

[0033] Furthermore, the increase range of the pressure of the pressure roller is determined by the difference between the defect area ratio of the wall film and a preset defect area ratio.

[0034] Furthermore, the present invention provides a detection system for preparing a wall film, comprising:

[0035] A bracket, comprising a base and a support rod;

[0036] The detection module includes a humidity sensor disposed on the support rod for detecting the ambient humidity of the test wall, and a camera disposed on the top of the support rod for detecting the image of the wall film on the test wall;

[0037] A processing module, which is connected to the detection module, performs denoising and grayscale processing on the image of the wall film on the test wall to calculate the defect area ratio of the wall film;

[0038] A control module, which is connected to the detection module and the processing module respectively, is used to determine the viscosity reduction speed of the test wall sticker film according to the ambient humidity; jointly determine the viscosity evaluation parameter of the test wall sticker film according to the peeling force of the test wall sticker film and the viscosity reduction speed; determine whether the adhesive performance of the test wall sticker film meets the standard according to the viscosity evaluation parameter; if it is determined that the adhesive performance of the test wall sticker film does not meet the standard, adjust the thickness of the adhesive layer of the wall sticker film in the preparation process of the wall sticker film; determine the pressure of the pressure roller for bonding according to the defect area ratio of the wall sticker film.

[0039] Compared with the prior art, the beneficial effect of the present invention is that the present invention provides a detection method and system for the preparation of wall sticker films, which can determine the viscosity decrease rate of the wall sticker film by testing the ambient humidity of the wall surface, and can accurately determine the thickness of the adhesive layer of the wall sticker film by the viscosity decrease rate of the wall sticker film, thereby reducing the misjudgment of the adhesive of the adhesive layer of the wall sticker film by the ambient humidity, and reducing the problem that the moisture in the adhesive of the adhesive layer caused by high ambient humidity increases, resulting in a decrease in the curing speed and adhesion of the adhesive layer, thereby causing the viscosity of the wall sticker film to decrease; at the same time, it also reduces the problem that the moisture in the adhesive of the adhesive layer caused by low ambient humidity causes the adhesive to lose moisture, resulting in an increase in the brittleness of the adhesive and a decrease in the adhesion of the adhesive layer; the pressure of the bonding pressure roller can be accurately determined by the defect area ratio of the collected wall sticker film, thereby reducing the occurrence of wrinkles and bubbles, and further improving the accuracy of the detection of the preparation of wall sticker films.

[0040] Furthermore, the present invention can calculate the viscosity decrease rate through the ambient humidity of the test wall, thereby accurately determining the change in viscosity of the adhesive layer of the wall film over time after the wall film is attached to the test wall, thereby reducing the situation in which the viscosity of the wall film decreases rapidly due to ambient humidity, thereby reducing the bonding tightness between the wall film and the test wall over time, thereby improving the accuracy of wall film preparation.

[0041] Furthermore, the present invention can overcome the problem of decreased adhesion of the adhesive layer of the wall sticker film due to a rapid decrease in the viscosity of the adhesive layer of the wall sticker film caused by environmental humidity by adjusting the thickness of the adhesive layer of the wall sticker film, thereby improving the accuracy of the thickness of the adhesive layer of the wall sticker film and further improving the accuracy of wall sticker film preparation. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural block diagram of a detection system for preparing a wall film according to an embodiment of the present invention;

[0043] Figure 2 A flow chart of the steps of a detection method for preparing a wall film according to an embodiment of the present invention;

[0044] Figure 3 A flow chart of the steps of determining the viscosity reduction rate of a wall film according to an embodiment of the present invention;

[0045] Figure 4 It is a structural schematic diagram of a detection system for preparing a wall film according to an embodiment of the present invention. DETAILED DESCRIPTION

[0046] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0047] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0048] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0049] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] See also Figures 1 to 4 As shown, they are respectively a structural block diagram of a detection system for preparing a wall film according to an embodiment of the present invention; a flow chart of steps of a detection method for preparing a wall film according to an embodiment of the present invention; a flow chart of steps of determining a viscosity drop rate of a wall film according to an embodiment of the present invention; a structural schematic diagram of a detection system for preparing a wall film according to an embodiment of the present invention; the present invention provides a detection method for preparing a wall film, comprising:

[0051] Step S1, cleaning the test wall surface to be pasted with the film and detecting the ambient humidity in turn, and determining the viscosity reduction rate of the test wall film according to the ambient humidity;

[0052] Step S2, attaching the test wall film to the test wall surface to obtain the peeling force of the test wall film on the test wall surface;

[0053] Step S3, determining the residual adhesive force of the test wall film according to the peeling force of the test wall film and the adhesiveness reduction rate;

[0054] Step S4, judging whether the adhesive performance of the test wall film meets the standard according to the residual adhesive force;

[0055] Step S5: if it is determined that the adhesive performance of the test wall film does not meet the standard, the thickness of the adhesive layer of the wall film in the preparation process of the wall film is adjusted;

[0056] Step S6, using the wall film with adjusted thickness to adhere to the test wall again;

[0057] Step S7, detecting the defect area of ​​the wall film to calculate the defect area ratio;

[0058] Step S8: determining the pressure of the pressure roller for laminating according to the defect area ratio of the wall film.

[0059] The present invention can determine the viscosity decrease rate of the wall film by testing the wall environment humidity, and can accurately determine the thickness of the adhesive layer of the wall film through the viscosity decrease rate of the wall film, thereby reducing the misjudgment of the adhesive of the adhesive layer of the wall film due to the environmental humidity, and reducing the problem that the moisture in the adhesive of the adhesive layer caused by high environmental humidity increases, resulting in a decrease in the curing speed and adhesion of the adhesive layer, thereby causing the viscosity of the wall film to decrease; at the same time, it also reduces the problem that the moisture in the adhesive of the adhesive layer caused by low environmental humidity causes the increase in moisture, resulting in increased brittleness of the adhesive of the adhesive layer and decreased adhesion; the pressure of the bonding pressure roller can be accurately determined by the proportion of the defective area of ​​the wall film collected, thereby reducing the occurrence of wrinkles, bubbles and unevenness, and further improving the accuracy of the detection of wall sticker preparation.

[0060] Specifically, the wall film is a layered structure, including a PCV film and an adhesive layer.

[0061] In implementation, the adhesive layer is one or both of acrylic adhesive and water-based epoxy resin.

[0062] Specifically, the process of determining the viscosity reduction rate of the test wall film according to the ambient humidity includes:

[0063] Use a humidity sensor to collect the ambient humidity of the test wall;

[0064] Calculate the viscosity drop rate based on the ambient humidity of the test wall and the standard ambient humidity value.

[0065] Specifically, the formula used to calculate the viscosity drop rate is, ν = κ × (R-R0);

[0066] Specifically, the viscosity decrease rate is the predicted value, v is the viscosity decrease rate, the unit is (N / 25mm) / day; k is the conversion coefficient; R is the test wall environment humidity, the unit is RH; R0 is the standard humidity, the unit is RH.

[0067] Specifically, when the ambient humidity of the test wall is 65% RH, the standard humidity is 50% RH, k is the viscosity reduction coefficient of 5; when the peeling force of the wall film is 800N / 25mm, when the ambient humidity is 65% RH, the viscosity reduction rate is v=5×15%=(0.75N / 25mm) / day.

[0068] Specifically, the calculation formula for the residual adhesive force of the test wall film on the sampling day is:

[0069] θ=σ-ν×t0

[0070] Among them, θ is the residual adhesive force on the sampling day, σ is the initial peeling force, v is the viscosity decrease rate, and t0 is the preset number of days of use of the test wall film.

[0071] In implementation, t0=100 days, δ=(800 N / 25 mm) / day, v=(0.75 N / 25 mm) / day.

[0072] Specifically, judging whether the adhesive performance of the test wall film meets the standard according to the residual adhesive force includes:

[0073] Compare the remaining adhesive force of the wall film with the preset adhesive force;

[0074] If the residual adhesive force of the wall film is less than or equal to the preset adhesive force, it is determined that the adhesive performance of the wall film does not meet the standard;

[0075] If the residual adhesive force of the wall film is greater than the preset adhesive force, it is determined that the adhesive performance of the wall film meets the standard.

[0076] Specifically, the adjustment range of the thickness of the adhesive layer of the wall film is determined by the difference between the viscosity decrease speed of the wall film and the preset viscosity decrease speed, wherein:

[0077] If the difference between the viscosity decrease speed of the wall film and the preset viscosity decrease speed is less than or equal to the preset first difference of the viscosity decrease speed, the thickness of the adhesive layer of the wall film is increased using the first thickness adjustment coefficient;

[0078] If the difference between the viscosity decrease speed of the wall film and the preset viscosity decrease speed is greater than the preset first viscosity decrease speed difference and less than or equal to the preset second viscosity decrease speed difference, the thickness of the adhesive layer of the wall film is increased using the second thickness adjustment coefficient;

[0079] If the difference between the viscosity decrease speed of the wall film and the preset viscosity decrease speed is greater than the second difference of the preset viscosity decrease speed, the third thickness adjustment coefficient is used to increase the thickness of the adhesive layer of the wall film.

[0080] In practice, the first difference of the preset viscosity reduction rate is (0.2N / 25mm) / day, the second difference of the preset viscosity reduction rate is (0.3N / 25mm) / day, and the formula for reducing the thickness of the adhesive layer of the wall film is G=g×αn, where G is the thickness of the adhesive layer of the wall film after adjustment, and g is the thickness of the adhesive layer of the wall film before adjustment. The thickness of the adhesive layer of the standard wall film is 0.100mm, and the viscosity of the adhesive layer of this thickness is 1000N / 25mm; αn is the nth thickness adjustment coefficient, α1=1.02; α2=1.04; α3=1.06, when the difference between the viscosity decrease rate of the wall film and the preset viscosity decrease rate is (0.25N / 25mm) / day, the thickness of the adhesive layer of the adjusted wall film is G=0.100×1.02=0.102mm, that is, the thickness of the adhesive layer of the wall film increases from 0.100mm to 0.102mmm.

[0081] Specifically, it also includes a camera, which is used to collect images of the wall film on the test wall.

[0082] Specifically, the defect area of ​​the wall film is detected to calculate the defect area ratio, including:

[0083] The image of the wall film on the test wall is grayscaled and denoised;

[0084] Obtain the area of ​​the test wall film, the bubble area, and the non-bubble uneven area to determine the defect area ratio;

[0085] The defect area ratio is the ratio of the sum of the bubble area and the non-bubble uneven area of ​​the wall film to the total area of ​​the wall film.

[0086] Specifically, the pressure of the pressure roller is determined according to the defect area ratio of the wall film, including:

[0087] Compare the defect area ratio of the wall film with the preset defect area ratio;

[0088] If the defect area ratio of the wall film is less than or equal to the preset defect area ratio, the pressure of the pressure roller is maintained;

[0089] If the defect area ratio of the wall film is greater than the preset defect area ratio, the pressure of the pressure roller is increased.

[0090] In the implementation, the preset defect area ratio is 3%. If the defect area ratio of the wall film is less than or equal to 3%, it is determined that the pressure of the pressure roller meets the standard. The preset pressure of the pressure roller is 40N / cm 2 .

[0091] Specifically, the increase range of the pressure of the pressure roller is determined by the difference between the defect area ratio of the wall film and the preset defect area ratio, wherein:

[0092] If the difference between the defect area ratio of the wall film and the preset defect area ratio is less than or equal to the preset defect area ratio difference, the pressure of the pressure roller is increased using the first pressure adjustment coefficient β1;

[0093] If the difference between the defect area ratio of the wall film and the preset defect area ratio is greater than the preset defect area ratio difference, the pressure of the pressure roller is increased using the second pressure adjustment coefficient β2;

[0094] The preset defect area ratio difference is 2%, and the adjustment formula for the pressure of the pressure roller is F = f × (1 + β n ) / 2; where F is the pressure of the pressure roller after adjustment, f is the pressure of the pressure roller before adjustment, and the preset pressure roller pressure is 40N / cm 2 β n is the nth pressure adjustment coefficient, β1=1.2; β2=1.5. If the defect area ratio of the wall film is 4%, the difference between the defect area ratio of the wall film and the preset defect area ratio is 1%, and 1% is less than or equal to 2%. Therefore, the pressure of the pressure roller after adjustment is F=f×(1+β n ) / 2 = 40 × (1 + 1.2) / 2 = 40 × 1.1 = 44 N / cm 2 That is, when the defect area of ​​the wall film accounts for 4%, the pressure of the pressure roller increases from 40N / cm 2 Increased to 44N / cm 2 .

[0095] Specifically, the present invention provides a detection system for preparing a wall film, comprising:

[0096] A bracket, comprising a base 1 and a support rod 2;

[0097] The detection module includes a humidity sensor 4 arranged on the support rod for detecting the ambient humidity of the test wall, and a camera 3 arranged on the top of the support rod for detecting the image of the wall film on the test wall;

[0098] A processing module, which is connected to the detection module, performs denoising and grayscale processing on the image of the wall film on the test wall to calculate the defect area ratio of the wall film;

[0099] A control module, which is connected to the detection module and the processing module respectively, is used to determine the viscosity reduction speed of the test wall sticker film according to the ambient humidity; jointly determine the viscosity evaluation parameter of the test wall sticker film according to the peeling force of the test wall sticker film and the viscosity reduction speed; determine whether the adhesive performance of the test wall sticker film meets the standard according to the viscosity evaluation parameter; if it is determined that the adhesive performance of the test wall sticker film does not meet the standard, adjust the thickness of the adhesive layer of the wall sticker film in the preparation process of the wall sticker film; determine the pressure of the pressure roller for bonding according to the defect area ratio of the wall sticker film.

[0100] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A method for detecting the preparation of a wall film, characterized in that: include: Step S1, cleaning the test wall surface to be pasted with the film and detecting the ambient humidity in turn, and determining the viscosity reduction rate of the test wall film according to the ambient humidity; Step S2, attaching the test wall film to the test wall surface to obtain the peeling force of the test wall film on the test wall surface; Step S3, determining the residual adhesive force of the test wall film according to the peeling force of the test wall film and the adhesiveness reduction rate; Step S4, judging whether the adhesive performance of the test wall film meets the standard according to the residual adhesive force; Step S5: if it is determined that the adhesive performance of the test wall film does not meet the standard, the thickness of the adhesive layer of the wall film in the preparation process of the wall film is adjusted; Step S6, using the wall film with adjusted thickness to adhere to the test wall again; Step S7, detecting the defect area of ​​the wall film to calculate the defect area ratio; Step S8: determining the pressure of the pressure roller for laminating according to the defect area ratio of the wall film.

2. The method for detecting the preparation of wall film according to claim 1, characterized in that: The wall film is a layered structure, comprising a PCV film and an adhesive layer.

3. The detection method for preparing wall film according to claim 2, characterized in that: The process of determining the viscosity reduction rate of the test wall film according to the ambient humidity includes: Use a humidity sensor to collect the ambient humidity of the test wall; Calculate the viscosity drop rate based on the ambient humidity of the test wall and the standard ambient humidity value.

4. The method for detecting the preparation of wall film according to claim 3, characterized in that: The calculation formula for the residual adhesive force of the test wall film on the sampling day is: θ=σ-ν×t0 Among them, θ is the residual adhesive force on the sampling day, σ is the initial peeling force, v is the viscosity decrease rate, and t0 is the preset number of days of use of the test wall film.

5. The method for detecting the preparation of wall film according to claim 4, characterized in that: Judging whether the adhesive performance of the test wall film meets the standard according to the residual adhesive force includes: Compare the remaining adhesive force of the wall film with the preset adhesive force; If the residual adhesive force of the wall film is less than or equal to the preset adhesive force, it is determined that the adhesiveness of the test wall film does not meet the standard.

6. The method for detecting the preparation of wall film according to claim 5, characterized in that: The adjustment range of the thickness of the adhesive layer of the wall film is determined by the difference between the viscosity reduction speed of the wall film and the preset viscosity reduction speed.

7. The method for detecting the preparation of a wall film according to claim 6, characterized in that: Also included is a camera, which is used to collect an image of the wall film on the test wall; Detecting the defect area of ​​the wall film to calculate the defect area ratio includes: The image of the wall film on the test wall is grayscaled and denoised; Obtain the area of ​​the test wall film, the bubble area, and the non-bubble uneven area to determine the defect area ratio; The defect area ratio is the ratio of the sum of the bubble area and the non-bubble uneven area of ​​the wall film to the total area of ​​the wall film.

8. The method for detecting the preparation of wall film according to claim 7, characterized in that: The pressure of the pressure roller is determined according to the defect area ratio of the wall film, including: Compare the defect area ratio of the wall film with the preset defect area ratio; If the defect area ratio of the wall film is greater than the preset defect area ratio, the pressure of the pressure roller is increased.

9. The method for detecting the preparation of wall film according to claim 8, characterized in that: The increase range of the pressure of the pressure roller is determined by the difference between the defect area ratio of the wall film and the preset defect area ratio.

10. A detection system using the detection method for preparing a wall film according to any one of claims 1 to 9, characterized in that: include: A bracket, comprising a base and a support rod; The detection module includes a humidity sensor disposed on the support rod for detecting the ambient humidity of the test wall, and a camera disposed on the top of the support rod for detecting the image of the wall film on the test wall; A processing module, which is connected to the detection module, performs denoising and grayscale processing on the image of the wall film on the test wall to calculate the defect area ratio of the wall film; A control module, which is connected to the detection module and the processing module respectively, is used to determine the viscosity reduction speed of the test wall sticker film according to the ambient humidity; jointly determine the viscosity evaluation parameter of the test wall sticker film according to the peeling force of the test wall sticker film and the viscosity reduction speed; determine whether the adhesive performance of the test wall sticker film meets the standard according to the viscosity evaluation parameter; if it is determined that the adhesive performance of the test wall sticker film does not meet the standard, adjust the thickness of the adhesive layer of the wall sticker film in the preparation process of the wall sticker film; determine the pressure of the pressure roller for bonding according to the defect area ratio of the wall sticker film.

Images