Strength detection device for release paper and detection method thereof

Abstract

The invention belongs to the technical field of papermaking, and particularly relates to a strength detection device for release paper and a detection method thereof.The strength detection device for release paper comprises a workbench, a first clamping assembly and a second clamping assembly are arranged on the workbench, the first clamping assembly is fixedly arranged on the workbench, and the second clamping assembly is fixedly arranged on the workbench; the first clamping assembly is used for clamping the lower end of a base material, and release paper is pasted on the base material; the second clamping assembly is arranged on the lifting frame above the first clamping assembly, the second clamping assembly is used for clamping the free end of the release paper, the lifting frame comprises a lifting assembly, and the lifting assembly is used for driving the second clamping assembly to slide in the direction away from the first clamping assembly to strip the release paper from the base material. A tension sensor is arranged on the second clamping assembly and is used for detecting the stripping force for stripping the release paper. Through the detection device, the accuracy of a detection result can be ensured, and the detection efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of papermaking, and in particular relates to a strength detection device for release paper and a detection method thereof. Background Art

[0002] Release paper, also known as isolation paper, anti-sticking paper, and silicone oil paper, is a kind of anti-sticking paper that prevents prepreg from sticking and protects prepreg from contamination. Release paper isolates sticky objects, such as tape, by setting a release agent on the surface. It generally needs to be peeled off and discarded when used; it is widely used mainly as a carrier of tape or adhesive products. Since the release agent has a certain permeability, if there is no certain barrier, the release agent will penetrate into the paper, resulting in poor curing and excessive use of release agent (too high cost) and many other adverse factors, so it is necessary to coat the paper.

[0003] The peeling force of release paper is also called release force, which is a very important indicator. Since the peeling force of release paper is very small, generally in grams, it is very difficult to measure it directly with an electronic tensile machine. Even if the tensile machine with high precision is measured, it will cause large errors due to other reasons. Manual control of pressure cannot be effectively controlled, and there is a pressure error, which affects the subsequent peeling force test results. In addition, when the tape is manually installed on the peel strength tester, it cannot be guaranteed that the angle between the tape and the release paper is 180 degrees. There is an angle deviation, the peeling force is small, and the precision is high. The interference factors in various manual operations will cause large errors in the final test results. In multiple experiments, repeated operations and cumbersome work affect the test efficiency. For this reason, a release paper rapid test peeling force detection device is proposed. Summary of the invention

[0004] The purpose of the present invention is to provide a release paper strength detection device and a detection method thereof in view of the above-mentioned technical problems, so as to ensure the accuracy of the detection results and improve the detection efficiency.

[0005] In view of this, the present invention provides a release paper strength detection device, comprising a workbench, on which is arranged:

[0006] A first clamping assembly, wherein the first clamping assembly is fixedly disposed on the workbench and is used to clamp the lower end of the substrate, and a release paper is pasted on the substrate;

[0007] The second clamping assembly is arranged on a lifting frame above the first clamping assembly, and the second clamping assembly is used to clamp the free end of the release paper. The lifting frame includes a lifting assembly, and the lifting assembly is used to drive the second clamping assembly to slide in a direction away from the first clamping assembly to peel the release paper from the substrate. The second clamping assembly is provided with a tension sensor for detecting the peeling force of the release paper.

[0008] In this technical solution, the first clamping component fixes and clamps the substrate, and then the second clamping component clamps the free end of the release paper. As the lifting component gradually moves upward with the second clamping component, the free end of the release paper moves upward, and the release paper is gradually peeled off from the substrate. The tension sensor and the computer record the force value changes during the entire peeling process until the release paper is completely peeled off from the substrate. The maximum peeling force value (N) during each test and the average peeling force value during the entire peeling process are recorded. The peeling strength calculation formula is: Peeling strength (N / 25mm) = Average peeling force value (N) ÷ Release paper sample width (25mm). The peeling strength of each release paper sample is calculated, and the average value is taken as the peeling strength test result of the release paper. The peeling force-displacement curve can also be drawn as needed to intuitively display the force value changes during the peeling process. The detection device can ensure the accuracy of the detection results and improve the detection efficiency.

[0009] Furthermore, the first clamping assembly comprises:

[0010] A first clamping seat, wherein a first receiving groove is formed on the first clamping seat, and the first receiving groove is used to receive the lower end of the substrate;

[0011] A first bolt, which is threadedly connected to the first clamping seat and transversely passes through the first clamping seat and extends into the first receiving groove.

[0012] The first clamping plate is slidably disposed in the first receiving groove, and the first bolt is circumferentially rotatably connected to the first clamping plate and axially fixedly connected to the first clamping plate.

[0013] In this technical solution, when clamping is required, the lower end of the substrate is placed between the first clamping plate and the side wall of the first accommodating groove in the first accommodating groove, and then the first bolt is rotated to make the first clamping plate gradually move closer to the side wall of the first accommodating groove, thereby clamping the lower end of the substrate.

[0014] Furthermore, the first clamping assembly also includes a calibration assembly, and the calibration assembly is used to calibrate the position of the substrate in the width direction to ensure that the substrate is in a vertical state.

[0015] In the present technical solution, the substrate is prone to tilt in the width direction by clamping in the thickness direction alone, which will affect the detection accuracy of the peeling force value. The calibration component can ensure that the substrate is in a vertical state, so that the clamping state of the substrate remains consistent each time, thereby ensuring the accuracy of the peeling force detection.

[0016] Further, the calibration component includes:

[0017] Calibration plates, wherein there are two calibration plates in total, the two calibration plates are arranged on both sides of the first clamping plate, and the calibration plates are slidably arranged on the side walls of the first accommodating groove;

[0018] There are two connecting rods in total, and the two connecting rods are symmetrically arranged on both sides of the first bolt. One end of the connecting rod is hinged to the first clamping plate, and the other end is hinged to the calibration plate.

[0019] In the present technical solution, during the process of rotating the first bolt forward, the first clamping plate also moves forward, and the two calibration plates are moved toward each other through the connecting rod, thereby limiting the two sides of the substrate and preventing the substrate from tilting. The calibration assembly is synchronously linked with the first clamping plate to enable clamping and calibration to be carried out, and the operation is simple.

[0020] Furthermore, the second clamping assembly includes:

[0021] A second clamping seat, wherein the second clamping seat is provided with a second receiving groove, and the second receiving groove is used to receive the free end of the release paper;

[0022] A second bolt, the second bolt is threadedly connected to the second clamping seat and laterally passes through the second clamping seat and extends into the second receiving groove,

[0023] The second clamping plate is slidably disposed in the second receiving groove, and the second bolt is circumferentially rotationally connected to the second clamping plate and axially fixedly connected to the second clamping plate.

[0024] In this technical solution, when clamping is required, the free end of the release paper is placed between the second clamping plate in the second receiving groove and the side wall of the second receiving groove, and then the second bolt is rotated to make the second clamping plate gradually move closer to the side wall of the second receiving groove, thereby clamping the free end of the release paper.

[0025] Furthermore, the lifting assembly includes:

[0026] A lifting motor, wherein the lifting motor is fixedly arranged on the lifting frame;

[0027] A guide rod, the guide rod vertically passes through the lifting frame and is fixedly connected to the lifting frame, and the second clamping assembly is slidably arranged on the guide rod;

[0028] The lifting screw rod vertically passes through the lifting frame and is rotatably connected to the lifting frame. The lifting screw rod is connected to the output end of the lifting motor and can rotate circumferentially. The second clamping assembly is spirally connected to the lifting screw rod.

[0029] Furthermore, the first clamping seat is detachably connected to the base, and the base is fixedly connected to the workbench.

[0030] In this technical solution, the first clamping seat can be removed from the base as needed to replace the first clamping assembly.

[0031] Furthermore, the first clamping plate and the second clamping plate walls are provided with anti-slip patterns.

[0032] Furthermore, a computer is also arranged on the workbench, and the tension sensor is electrically connected to the computer.

[0033] Furthermore, the detection method of the strength detection device comprises the following steps:

[0034] S1: Prepare a sample by gluing the release paper onto the substrate and leaving a free end of the release paper;

[0035] S2: Clamping: clamp the lower part of the substrate of the prepared sample onto the first clamping assembly, clamp the free end of the release paper onto the second clamping assembly, and then the second clamping assembly gradually moves upwards driven by the lifting assembly, moving the free end of the release paper upwards, and gradually peeling the release paper off the substrate. The tension sensor and the computer record the force value changes during the entire peeling process until the release paper is completely peeled off from the substrate.

[0036] The beneficial effects of the present invention are:

[0037] 1. This detection device can ensure the accuracy of the detection results and improve the detection efficiency.

[0038] 2. If the substrate is clamped in the thickness direction alone, it is easy for the substrate to tilt in the width direction, which will affect the detection accuracy of the peeling force value. The calibration component can ensure that the substrate is in a vertical state, so that the clamping state of the substrate is consistent each time, and the accuracy of the peeling force detection is guaranteed. The calibration component is synchronously linked with the first clamping plate to enable clamping and calibration to be carried out, and the operation is simple.

[0039] 3. The first clamping seat can be removed from the base and the first clamping assembly can be replaced as needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a stereogram of the present invention;

[0041] Figure 2 is a front view of the present invention;

[0042] Figure 3 It is a stereogram of the manufactured specimen;

[0043] Figure 4 yes Figure 1 A partial enlarged view of the middle A;

[0044] Figure 5 yes Figure 2 A partial enlarged view of point B in the middle;

[0045] Figure 6 is a perspective view of a first clamping assembly;

[0046] Figure 7 is a cross-sectional view of the first clamping assembly;

[0047] The symbols in the figure are:

[0048] 1. Workbench; 2. First clamping assembly; 3. Base material; 4. Release paper; 5. Second clamping assembly; 6. Lifting frame; 7. Free end; 8. Tension sensor; 9. First clamping seat; 10. First receiving groove; 11. First bolt; 12. First clamping plate; 13. Calibration plate; 14. Connecting rod; 15. Second clamping seat; 16. Second receiving groove; 17. Second bolt; 18. Lifting motor; 19. Guide rod; 20. Lifting screw rod; 21. Base; 22. Anti-slip pattern; 23. Computer. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0050] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0051] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0052] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0053] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0054] Embodiment 1

[0055] like Figure 1-3 As shown, a strength detection device for release paper 4 includes a workbench 1, on which are provided:

[0056] A first clamping assembly 2, wherein the first clamping assembly 2 is fixedly disposed on the workbench 1, and the first clamping assembly 2 is used to clamp the lower end of a substrate 3, and a release paper 4 is pasted on the substrate 3;

[0057] The second clamping assembly 5 is arranged on the lifting frame 6 above the first clamping assembly 2. The second clamping assembly 5 is used to clamp the free end 7 of the release paper 4. The lifting frame 6 includes a lifting assembly. The lifting assembly is used to drive the second clamping assembly 5 to slide in a direction away from the first clamping assembly 2 to peel the release paper 4 from the substrate 3. The second clamping assembly 5 is provided with a tension sensor 8 for detecting the peeling force of the release paper 4.

[0058] The first clamping component 2 clamps the substrate 3, and then the second clamping component 5 clamps the free end 7 of the release paper 4. As the lifting component moves upward with the second clamping component 5, the free end 7 of the release paper 4 moves upward, and the release paper 4 is gradually peeled off from the substrate 3. The tension sensor 8 and the computer 23 record the force value changes during the entire peeling process until the release paper 4 is completely peeled off from the substrate 3. The maximum peeling force value (N) during each test and the average peeling force value during the entire peeling process are recorded. The peeling strength calculation formula is: peeling strength (N / 25mm) = average peeling force value (N) ÷ release paper 4 sample width (25mm). The peeling strength of each release paper 4 sample is calculated, and the average value is taken as the peeling strength test result of the release paper 4. The peeling force-displacement curve can also be drawn as needed to intuitively display the force value changes during the peeling process. The detection device can ensure the accuracy of the detection results and improve the detection efficiency.

[0059] Embodiment 2

[0060] like Figure 4 As shown, the first clamping assembly 2 includes:

[0061] A first clamping seat 9, wherein a first receiving groove 10 is formed on the first clamping seat 9, and the first receiving groove 10 is used to receive the lower end of the substrate 3;

[0062] A first bolt 11, which is threadedly connected to the first clamping seat 9 and laterally passes through the first clamping seat 9 and extends into the first receiving groove 10,

[0063] The first clamping plate 12 is slidably disposed in the first receiving groove 10 , and the first bolt 11 is circumferentially rotatably connected to the first clamping plate 12 and axially fixedly connected to the first clamping plate 12 .

[0064] When clamping is required, the lower end of the substrate 3 is placed between the first clamping plate 12 and the side wall of the first accommodating groove 10, and then the first bolt 11 is rotated to make the first clamping plate 12 gradually move closer to the side wall of the first accommodating groove 10, thereby clamping the lower end of the substrate 3.

[0065] like Figure 6-7 As shown, the first clamping assembly 2 further includes a calibration assembly, and the calibration assembly is used to calibrate the position of the substrate 3 in the width direction to ensure that the substrate 3 is in a vertical state.

[0066] If the substrate 3 is clamped in the thickness direction alone, it is easy for it to tilt in the width direction, which will affect the detection accuracy of the peeling force value. The calibration component can ensure that the substrate 3 is in a vertical state, so that the clamping state of the substrate 3 is kept consistent each time, thereby ensuring the accuracy of the peeling force detection.

[0067] The calibration assembly comprises:

[0068] A calibration plate 13, wherein there are two calibration plates 13, and the two calibration plates 13 are respectively arranged on both sides of the first clamping plate 12, and the calibration plates 13 are slidably arranged on the side wall of the first receiving groove 10;

[0069] There are two connecting rods 14 in total. The two connecting rods 14 are symmetrically arranged on both sides of the first bolt 11 . One end of the connecting rod 14 is hinged to the first clamping plate 12 , and the other end is hinged to the calibration plate 13 .

[0070] When the first bolt 11 is rotated forward, the first clamping plate 12 also moves forward, and the two calibration plates 13 are moved toward each other through the connecting rod 14, thereby limiting the two sides of the substrate 3 to prevent the substrate 3 from tilting. The calibration assembly is synchronously linked with the first clamping plate 12 to enable clamping and calibration to be performed, and the operation is simple.

[0071] Embodiment 3

[0072] like Figure 5 As shown, the second clamping assembly 5 includes:

[0073] A second clamping seat 15 , on which a second receiving groove 16 is formed, and the second receiving groove 16 is used to receive the free end 7 of the release paper 4;

[0074] The second bolt 17 is threadedly connected to the second clamping seat 15 and laterally passes through the second clamping seat 15 and extends into the second receiving groove 16.

[0075] The second clamping plate is slidably disposed in the second receiving groove 16 , and the second bolt 17 is circumferentially rotationally connected to the second clamping plate and axially fixedly connected to the second clamping plate.

[0076] When clamping is required, the free end 7 of the release paper 4 is placed between the second clamping plate in the second receiving groove 16 and the side wall of the second receiving groove 16, and then the second bolt 17 is rotated to make the second clamping plate gradually move closer to the side wall of the second receiving groove 16, thereby clamping the free end 7 of the release paper 4.

[0077] Embodiment 4

[0078] like Figure 1-2 As shown, the lifting assembly includes:

[0079] A lifting motor 18, wherein the lifting motor 18 is fixedly arranged on the lifting frame 6;

[0080] A guide rod 19, the guide rod 19 vertically passes through the lifting frame 6 and is fixedly connected to the lifting frame 6, and the second clamping assembly 5 is slidably arranged on the guide rod 19;

[0081] The lifting screw rod 20 vertically passes through the lifting frame 6 and is rotatably connected to the lifting frame 6 . The lifting screw rod 20 is connected to the output end of the lifting motor 18 and can rotate circumferentially. The second clamping assembly 5 is spirally connected to the lifting screw rod 20 .

[0082] The first clamping seat 9 is detachably connected to the base 21, and the base 21 is fixedly connected to the workbench 1. The first clamping seat 9 can be removed from the base 21 and the first clamping assembly 2 can be replaced as needed.

[0083] The first clamping plate 12 and the second clamping plate wall are provided with anti-slip patterns 22 .

[0084] The workbench 1 is also provided with a computer 23 , and the tension sensor 8 is electrically connected to the computer 23 .

[0085] The detection method of the strength detection device comprises the following steps:

[0086] S1: Prepare a sample, glue the release paper 4 to the substrate 3 with glue, and leave a free end 7 of the release paper 4;

[0087] S2: Clamping: clamp the lower part of the substrate 3 of the prepared sample onto the first clamping component 2, clamp the free end 7 of the release paper 4 onto the second clamping component 5, and then the second clamping component 5 gradually moves upward under the drive of the lifting component, moving the free end 7 of the release paper 4 upward, and gradually peeling the release paper 4 off the substrate 3. The tension sensor 8 and the computer 23 record the force value changes during the entire peeling process until the release paper 4 is completely peeled off from the substrate 3.

[0088] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A strength detection device for release paper, characterized in that , comprising a workbench (1), on which is arranged: A first clamping assembly (2), the first clamping assembly (2) being fixedly arranged on the workbench (1), the first clamping assembly (2) being used to clamp the lower end of a substrate (3), a release paper (4) being pasted on the substrate (3); A second clamping assembly (5), the second clamping assembly (5) is arranged on a lifting frame (6) above the first clamping assembly (2), the second clamping assembly (5) is used to clamp the free end (7) of the release paper (4), the lifting frame (6) includes a lifting assembly, the lifting assembly is used to drive the second clamping assembly (5) to slide in a direction away from the first clamping assembly (2) to peel the release paper (4) from the substrate (3), and the second clamping assembly (5) is provided with a tension sensor (8) for detecting the peeling force of the release paper (4).

2. A release paper strength detection device according to claim 1, characterized in that: The first clamping assembly (2) comprises: A first clamping seat (9), wherein the first clamping seat (9) is provided with a first receiving groove (10), and the first receiving groove (10) is used to receive the lower end of the substrate (3); A first bolt (11), the first bolt (11) is threadedly connected to the first clamping seat (9) and transversely passes through the first clamping seat (9) and extends into the first receiving groove (10), A first clamping plate (12), wherein the first clamping plate (12) is slidably disposed in the first receiving groove (10), and a first bolt (11) is circumferentially rotatably connected to the first clamping plate (12) and axially fixedly connected to the first clamping plate (12).

3. A release paper strength detection device according to claim 2, characterized in that: The first clamping assembly (2) further comprises a calibration assembly, wherein the calibration assembly is used to calibrate the position of the substrate (3) in the width direction to ensure that the substrate (3) is in a vertical state.

4. A release paper strength detection device according to claim 3, characterized in that: The calibration assembly comprises: A calibration plate (13), wherein there are two calibration plates (13), the two calibration plates (13) are arranged on both sides of the first clamping plate (12), and the calibration plates (13) are slidably arranged on the side wall of the first accommodating groove (10); There are two connecting rods (14) in total. The two connecting rods (14) are symmetrically arranged on both sides of the first bolt (11). One end of the connecting rod (14) is hinged to the first clamping plate (12), and the other end is hinged to the calibration plate (13).

5. The release paper strength detection device according to claim 2, characterized in that: The second clamping assembly (5) comprises: A second clamping seat (15), wherein the second clamping seat (15) is provided with a second receiving groove (16), and the second receiving groove (16) is used to receive the free end (7) of the release paper (4); a second bolt (17), the second bolt (17) being threadedly connected to the second clamping seat (15) and laterally passing through the second clamping seat (15) and extending into the second receiving groove (16), A second clamping plate, the second clamping plate is slidably arranged in the second accommodating groove (16), and a second bolt (17) is circumferentially rotatably connected to the second clamping plate and axially fixedly connected to the second clamping plate.

6. A release paper strength detection device according to claim 1, characterized in that: The lifting assembly comprises: A lifting motor (18), wherein the lifting motor (18) is fixedly arranged on the lifting frame (6); A guide rod (19), the guide rod (19) vertically passes through the lifting frame (6) and is fixedly connected to the lifting frame (6), and the second clamping assembly (5) is slidably arranged on the guide rod (19); A lifting screw rod (20) vertically passes through the lifting frame (6) and is rotatably connected to the lifting frame (6). The lifting screw rod (20) is connected to the output end of the lifting motor (18) and can rotate in a circumferential direction. The second clamping assembly (5) is spirally connected to the lifting screw rod (20).

7. A release paper strength detection device according to claim 5, characterized in that: The first clamping seat (9) is detachably connected to the base (21), and the base (21) is fixedly connected to the workbench (1).

8. The release paper strength detection device according to claim 5, characterized in that: The first clamping plate (12) and the second clamping plate walls are both provided with anti-slip patterns (22).

9. The release paper strength detection device according to claim 1, characterized in that: A computer (23) is also provided on the workbench (1), and the tension sensor (8) is electrically connected to the computer (23).

10. The release paper strength detection device according to claim 4, characterized in that: The detection method of the strength detection device comprises the following steps: S1: preparing a sample, gluing a release paper (4) to a substrate (3) with glue, and leaving a free end (7) of the release paper (4); S2: Clamping: clamp the lower part of the substrate (3) of the prepared sample onto the first clamping component (2), clamp the free end (7) of the release paper (4) onto the second clamping component (5), and then the second clamping component (5) gradually moves upwards under the drive of the lifting component, moving the free end (7) of the release paper (4) upwards, and gradually peeling the release paper (4) off the substrate (3). The tension sensor (8) and the computer (23) record the force value changes during the entire peeling process until the release paper (4) is completely peeled off from the substrate (3).

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