Method for testing stripping force of butyl rubber

Abstract

The embodiment of the invention provides a method for testing the stripping force of butyl rubber, and belongs to the technical field of performance testing of sealants. The stripping force testing method comprises the following steps: stacking a rigid base material, a release sheet, butyl rubber, an adhesive film and a flexible back plate in sequence to obtain a laminated assembly; wherein the release sheet is stacked on the rigid base material and is close to the first end of the butyl rubber, so that the part, close to the first end, of the butyl rubber is isolated from the rigid base material, and the adhesive force between the adhesive film and the flexible back plate is larger than that between the butyl rubber and the flexible back plate; laminating the laminated assembly; a tensile machine is adopted to clamp the end, close to the first end, of the flexible back plate, the flexible back plate is pulled in the direction away from the first end, and the flexible back plate drives the butyl rubber to be stripped from the rigid base material; and determining the stripping force of the butyl rubber based on the tensile force value of the tensile machine. According to the embodiment of the invention, the stripping force of the butyl rubber can be tested.

Description

Technical Field

[0001] The present application relates to the technical field of solar cell accessories and the technical field of sealant performance testing, and in particular to a method for testing the peeling force of butyl adhesive. Background Art

[0002] With the iteration of solar cell technology, new batteries such as heterojunction (HJT), perovskite and other new batteries are more sensitive to water vapor and need to be sealed with butyl rubber with strong water-blocking properties.

[0003] Butyl adhesive is a type of single-component adhesive made of polyisobutylene and butyl rubber as the main resin, with additives such as tackifying resin, desiccant, filler, etc., which has excellent barrier properties. The water vapor transmission rate (1mm) of common photovoltaic butyl adhesive is usually less than 0.1 g / (m2·day). By sealing the edge of the module and the busbar outlet, good packaging of the photovoltaic module can be achieved.

[0004] For the components of the above packaging solution, the risk of water vapor intrusion is not only the failure of butyl rubber itself, but also the greater risk of interface failure caused by the debonding of the butyl rubber material and the glass interface, that is, water vapor intrudes into the component along the interface between butyl rubber and glass, damaging the battery cells and causing the power of the component to drop. The quality of the bonding between butyl rubber and glass is crucial to the life of photovoltaic modules. Therefore, the investigation of the bonding performance between butyl rubber and glass is an important topic in the photovoltaic industry.

[0005] However, there is currently no unified standard test method in the industry to measure the peel strength of the interface between butyl rubber and glass.

[0006] It should be noted that the above content is not necessarily prior art, nor is it intended to limit the scope of patent protection of this application. Summary of the invention

[0007] The embodiments of the present application provide a method for testing the peel force of butyl rubber to solve or alleviate one or more of the technical problems mentioned above.

[0008] The present application embodiment provides a method for testing the peeling force of butyl rubber, comprising: The rigid substrate, the release sheet, the butyl rubber, the adhesive film and the flexible back sheet are stacked in sequence to obtain a laminated assembly; wherein the release sheet is stacked on the rigid substrate and is stacked near the first end of the butyl rubber to isolate the portion of the butyl rubber near the first end from the rigid substrate, and the adhesive force between the adhesive film and the flexible back sheet is greater than the adhesive force between the butyl rubber and the flexible back sheet; and the laminated assembly is laminated; The end of the flexible back plate close to the first end is clamped by a tensile machine, and the flexible back plate is pulled in a direction away from the first end, so that the flexible back plate drives the butyl rubber to be peeled off from the rigid substrate; Based on the tensile force value of the tensile testing machine, the peel force of the butyl rubber is determined.

[0009] In one embodiment, the water drop contact angle of the adhesive film is 90°-180°; the adhesive film includes a POE film or an EPE film.

[0010] In one embodiment, the flexible backplane is a metal material or a non-metal material; the metal material includes a magnesium alloy or an aluminum alloy. In one embodiment, laminating the stacked assembly includes: laminating the stacked assembly at a temperature of 70° C. to 140° C. for a lamination time of 8 to 22 minutes.

[0011] In one embodiment, it further includes: Scribing the laminate assembly with a plurality of scribe lines from the end of the flexible back sheet close to the first end in a direction away from the first end, wherein the scribe lines extend from the flexible back sheet to the butyl rubber to form a plurality of test specimens; Accordingly, a tensile machine is used to clamp the end of the flexible back plate close to the first end, and the flexible back plate is pulled in a direction away from the first end, so that the flexible back plate drives the butyl rubber to be peeled off from the rigid substrate, including: The end of the first end of the flexible back plate in the test sample is clamped by a tensile testing machine, and the flexible back plate is pulled in a direction away from the first end, so that the flexible back plate in the test sample drives the butyl rubber in the test sample to be peeled off from the rigid substrate; Accordingly, based on the tensile force value of the tensile testing machine, the peeling force of butyl rubber is determined, including: The peel force of butyl rubber is determined based on the tensile force value of the tensile testing machine and the width of the test specimen.

[0012] In one embodiment, the number of the test strips is at least 5; the width of the test strips is 5-15 mm; and the length of the test strips is 80-150 mm.

[0013] In one embodiment, the tensile testing machine is a tensile testing machine with a temperature regulation function.

[0014] In one embodiment, a tensile testing machine is used to clamp the end of the flexible back plate in the test sample close to the first end, and the flexible back plate is pulled in a direction away from the first end, so that the flexible back plate in the test sample drives the butyl rubber in the test sample to be peeled off from the rigid substrate, including: A tensile testing machine is used to clamp the end of the flexible back plate in the test specimen close to the first end, and the flexible back plate is pulled to move in the direction away from the first end of the flexible back plate at a preset speed; the preset speed is a uniform speed of 90-160 mm / min; the speed error of the preset speed is ±10 mm / min.

[0015] In one embodiment, a tensile machine is used to clamp the end of the flexible back plate close to the first end, and the flexible back plate is pulled in a direction away from the first end, so that the flexible back plate drives the butyl rubber to be peeled off from the rigid substrate, and the method also includes: The laminated components are subjected to aging treatment.

[0016] The embodiment of the present application adopts the above technical solution to realize the peeling force test of butyl rubber; the result of the peeling force test is accurate and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0018] Figure 1 A schematic flow chart showing a method for testing the glass content of butyl rubber according to an embodiment of the present application.

[0019] Figure 2 A schematic structural diagram of a stacked assembly according to an embodiment of the present application is shown.

[0020] Figure 3 A schematic diagram of the structural decomposition of a stacked assembly according to an embodiment of the present application is shown.

[0021] Figure 4 A schematic diagram showing the structure of a stacked assembly according to an embodiment of the present application being scribed into a plurality of test strips.

[0022] Figure 5 A schematic diagram showing the tensile testing machine according to an embodiment of the present application pulling the flexible back plate to move. DETAILED DESCRIPTION

[0023] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings. In the accompanying drawings, for clarity, the sizes of layers, regions, elements and their relative sizes may be exaggerated. Wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limitations on the present application. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0024] It should be understood that when an element or layer is referred to as "on ...", "adjacent to ...", "connected to" or "coupled to" other elements or layers, it can be directly on, adjacent to, connected to or coupled to other elements or layers, or there can be intervening elements or layers. On the contrary, when an element is referred to as "directly on ...", "directly adjacent to ...", "directly connected to" or "directly coupled to" other elements or layers, there is no intervening element or layer. It should be understood that although the terms first, second, third, etc. can be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the present disclosure, the first element, component, region, layer or part discussed below can be represented as the second element, component, region, layer or part. And when the second element, component, region, layer or part is discussed, it does not mean that the present disclosure necessarily has the first element, component, region, layer or part.

[0025] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] In the present application, when it comes to a numerical interval (i.e., a numerical range), unless otherwise specified, the distribution of the optional numerical values ​​in the numerical interval is considered to be continuous, and includes the two numerical endpoints (i.e., the minimum and maximum values) of the numerical interval, and each numerical value between the two numerical endpoints. Unless otherwise specified, when the numerical interval only refers to an integer in the numerical interval, it includes the two endpoint integers of the numerical range, and each integer between the two endpoints, which is equivalent to directly listing each integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be merged. In other words, unless otherwise specified, the numerical range disclosed in the present application should be understood to include any and all sub-ranges included therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, a percentage, a ratio, etc. "Numerical interval" allows for broadly including quantitative intervals such as percentage intervals, ratio intervals, and ratio intervals.

[0028] Hereinafter, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. It should be noted that these exemplary embodiments can be implemented in many different forms and should not be construed as being limited to the embodiments described herein.

[0029] The embodiment of the present application provides a method for testing the peeling force of butyl rubber to accurately test the peeling force of butyl rubber. In the scenario where butyl rubber is needed, the butyl rubber that meets the application requirements can be determined according to the peeling force parameters of the butyl rubber to ensure that the bonding of the butyl rubber meets the application requirements and avoid damage to the product due to the weak bonding of the butyl rubber.

[0030] The adhesive force of butyl rubber is relatively small, and it is difficult to test the peeling force of butyl rubber based on the existing peeling force testing methods of other types of adhesive films. The present application embodiment provides a testing method suitable for testing the peeling force of butyl rubber.

[0031] Figure 1 The following is a schematic flow chart showing a method for testing the glass content of butyl rubber according to an embodiment of the present application. Figure 1 As shown, and refer to Figures 2 to 5 The peeling force testing method of butyl rubber provided in the embodiment of the present application includes: S110 , stacking the rigid substrate 100 , the release sheet 200 , the butyl rubber 300 , the adhesive film 400 , and the flexible back sheet 500 in sequence to obtain a laminated assembly.

[0032] The length of the release sheet 200 is smaller than the size of the butyl rubber 300, and the release sheet 200 is stacked on the rigid substrate 100 and close to the first end of the butyl rubber 300 to isolate the portion of the butyl rubber 300 close to the first end from the rigid substrate 100. The bonding force between the adhesive film 400 and the flexible back sheet 500 is greater than the bonding force between the butyl rubber 300 and the flexible back sheet 500.

[0033] The rigid substrate 100 may be a plate made of a rigid material that is not easily deformed, such as glass, wood, or stainless steel.

[0034] The thickness of the rigid substrate 100 may be 2-10 mm, for example, 2 mm, 3 mm, 5 mm, 7 mm, 9 mm or 10 mm.

[0035] In one example, based on the prepared application scenario of the butyl adhesive 300, a rigid substrate 100 suitable for the prepared application scenario can be selected to perform a peeling force test of the butyl adhesive 300. For example, the butyl adhesive 300 is used in a solar cell packaging scenario, in which the butyl adhesive 300 needs to be bonded to glass. When testing the peeling force of the butyl adhesive 300, glass of the same material as that of the application scenario can be selected as the rigid substrate 100, and the thickness of the glass is the same as the thickness of the glass bonded to the butyl adhesive 300 in the application scenario.

[0036] In one example, the stacking of the rigid substrate 100, the release sheet 200, the butyl rubber 300, the adhesive film 400 and the flexible back sheet 500 in the stacking assembly can be stacked according to the preset rules of the peeling force test method of the film or sealant, etc. The preset rules may include: the release sheet 200 is stacked on the rigid substrate 100 and is stacked close to the first end of the butyl rubber 300, and the size of the release sheet 200 along the peeling direction of the butyl rubber 300 is 1 / 20-1 / 8 of the size of the butyl rubber 300 along the peeling direction, for example, 1 / 20, 1 / 10 or 1 / 8 of the size of the butyl rubber 300 along the peeling direction.

[0037] The release sheet 200 may be stacked close to the first end of the butyl rubber 300 and protrude from the butyl rubber 300 .

[0038] The release sheet 200 may be made of a material that is bonded or not bonded to the rigid substrate 100, and may also be made of a material that is not bonded to the butyl rubber 300. For example, the release sheet 200 may be a paper sheet or a sheet made of polytetrafluoroethylene.

[0039] The release sheet 200 is stacked between a part of the butyl rubber 300 and the rigid substrate 100, so that when a peeling force test is performed, the butyl rubber 300 can be peeled off from the rigid substrate 100 starting from the end position of the first end, and when the tensile machine pulls the flexible back plate 500, other positions of the butyl rubber 300 can be driven to peel off from the rigid substrate 100.

[0040] In the embodiment of the present application, considering that the bonding force between the butyl rubber 300 and the flexible back panel 500 is insufficient, it is difficult to make the pulling of the flexible back panel 500 drive the butyl rubber 300 glass, and thus it is proposed to bond the flexible back panel 500 and the butyl rubber 300 through an adhesive film 400; the bonding force between the adhesive film 400 and the flexible back panel 500 is greater than the bonding force between the butyl rubber 300 and the flexible back panel 500; thereby ensuring that the flexible back panel 500 can at least drive the adhesive film 400.

[0041] In the embodiment of the present application, the butyl rubber 300 may be solid butyl rubber or colloidal butyl rubber.

[0042] The size of the adhesive film 400 can be matched with the size of the flexible back plate 500, and can also be matched with the size of the butyl rubber 300; the size of the flexible back plate 500 is larger than the size of the butyl rubber 300, and the flexible back plate 500 has a protruding edge on the side close to the release sheet 200 relative to the butyl rubber 300, so as to facilitate the tensile machine to pull the flexible back plate 500 from the edge and drive the flexible back plate 500 to move or rotate.

[0043] S120, laminating the stacked components.

[0044] After laminating the stacked components, the peeling force test is performed to ensure that the butyl rubber 300 is bonded to the rigid substrate 100 and the adhesive film 400; in addition, it is also suitable for the application scenario of the butyl rubber 300, which is to laminate the butyl rubber 300 and other bonded materials. This makes the peeling force measured for the butyl rubber 300 more referenceable for its corresponding application scenario.

[0045] Exemplarily, the temperature and time of lamination in this step may also refer to and be adapted to the preparatory application scenario of the butyl rubber 300 .

[0046] S130 , using a tensile machine to clamp the end of the flexible back plate 500 close to the first end, and pulling the flexible back plate 500 in a direction away from the first end, so that the flexible back plate 500 drives the butyl rubber 300 to be peeled off from the rigid substrate 100 .

[0047] The tensile testing machine may be a device capable of pulling the flexible backsheet 500 and obtaining a tensile force value.

[0048] The tensile testing machine can be set with a preset pulling path to drive the flexible back plate 500 to move along the preset moving path.

[0049] In one example, if Figure 5 As shown, the pulling path may be to pull the end of the flexible back plate 500 close to the first end to flip or rotate 180°, and then drive the flexible back plate 500 to move horizontally in a direction away from the first end.

[0050] In one example, if Figure 5 As shown, the pulling path can also be to pull the end of the flexible back panel 500 close to the first end upward, or to move upward and away from the first end, so that the tensile machine drives the flexible back panel 500 to move in a direction away from the first end, thereby achieving the separation of the flexible back panel 500 from the rigid substrate 100.

[0051] In one example, if Figure 5 As shown, the tensile machine may include at least two chucks, the first chuck 702 clamps one end of the flexible back plate 500 to pull the flexible back plate 500 to move; the second chuck 701 clamps the rigid substrate 100 to keep the rigid substrate 100 immobile. The embodiment of the present application does not limit the shape and structure of the first chuck 702 and the second chuck 701.

[0052] S140, determining the peeling force of the butyl rubber 300 based on the tensile force value of the tensile testing machine.

[0053] When the tensile machine pulls the flexible back plate 500 to move, the tensile force value changes with time.

[0054] In one example, based on experience, the tensile force values ​​within a period of time may be selected, and their average values ​​may be calculated to determine the peeling force of the butyl rubber 300 .

[0055] In one example, a curve of the change of the tensile force value over time may be obtained, and then the tensile force value may be determined by a preset calculation formula, and the peeling force of the butyl rubber 300 may be determined based on the tensile force value.

[0056] Based on the definition of peeling force, it is the relationship between the pulling force value and the width. Wherein, the width in the embodiment of the present application refers to the dimension in the direction perpendicular to the moving direction or peeling direction of the flexible backsheet 500.

[0057] In one example, the peeling force may also be a ratio of the convolution of the pulling force value within a period of time and the peeling area within the period of time.

[0058] In one embodiment, the bonding force between the adhesive film 400 and the flexible backplane 500 is greater than 40 N / m.

[0059] The bonding force between the butyl rubber 300 and the flexible back sheet 500 is less than 40 N / m; therefore, it is difficult for the flexible back sheet 500 to drive the butyl rubber 300 to move or to be peeled off from the rigid substrate 100 .

[0060] Based on the experimental experience of the inventor, when the adhesive force of the adhesive film 400 to the flexible back panel 500 is greater than 40 N / m, the flexible back panel 500 can drive the adhesive film 400 to move, and the adhesive film 400 can drive the butyl rubber 300 to move, thereby driving the butyl rubber 300 to peel off from the rigid substrate 100.

[0061] In one embodiment, the water drop contact angle of the adhesive film 400 is 9°-180°; the adhesive film 400 includes POE (Polyolyaltha Olfin, ethylene-octene copolymer) film, EPE (EVA-POE-EVA) co-extruded film or EVA (Ethylene-vinyl acetate copolymer, ethylene-vinyl acetate copolymer) film.

[0062] In the embodiment of the present application, it is preferred to use an adhesive film 400 with a water drop contact angle of 90°-180°; in the case of this water drop contact angle, the adhesive film 400 is a hydrophobic film; and the butyl rubber 300 is also a hydrophobic film, and the two hydrophobic films have compatible properties; the adhesive film 400 and the butyl rubber 300 can be firmly bonded in the case of lamination. Therefore, when the flexible backplane 500 drives the adhesive film 400, the butyl rubber 300 can be driven to peel off from the rigid substrate 100.

[0063] In other examples, some hydrophilic adhesive films with a water drop contact angle less than 90° may also implement the solution of the embodiment of the present application, as long as they can drive the butyl adhesive 300 to be peeled off from the rigid substrate 100.

[0064] In one embodiment, the flexible backplane 500 is made of a metal material or a non-metal material; the metal material includes a magnesium alloy or an aluminum alloy. The tensile machine drives the flexible back plate 500 to move. The flexibility of the flexible back plate 500 refers to the fact that it is not easy to recover to its original shape after being bent. Any plate that meets the flexibility characteristics can be applied to the peeling force test of the butyl rubber 300 of this application, including metal materials and non-metal materials.

[0065] The material of the flexible backplane 500 may also include a material that is easy to bond with the adhesive film 400. For example, the flexible backplane 500 may have a rough surface, such as other metal or non-metal coatings may be coated on the metal material or non-metal material.

[0066] Exemplarily, the non-metallic material may include any of the following: TPT structure back panel: double-sided back panel with T-film structure; KPK structural backboard or KPE backboard: a backboard with K film structure on both sides; CPC or FFC structural back sheet: back sheet coated with fluororesin; KPC and TPC structure backplane: T film or K film is used on one side, and fluorine coating structure is used on one side.

[0067] In one embodiment, laminating the stacked assembly includes: laminating the stacked assembly at a temperature of 70° C. to 140° C. for a lamination time of 8 to 22 minutes.

[0068] The stacked components are laminated to form a laminate with an integrated structure. Only in this case does the pulling of a tensile machine need to be performed to cause the butyl rubber 300 to be peeled off from the rigid substrate 100 .

[0069] The time and temperature for laminating the stacked components can be set based on the actual application scenario. Different stacked components can also be laminated under different lamination temperature and lamination time variables to test at what lamination temperature and lamination time the butyl rubber 300 has the greatest peeling force; so that when the butyl rubber 300 is used, a suitable lamination temperature and lamination time can be selected.

[0070] For example, the lamination temperature is 80°C and the lamination time is 10 min; for another example, the lamination temperature is 80°C and the lamination time is 10 min; for another example, the lamination temperature is 70°C and the lamination time is 18 min; for another example, the lamination temperature is 80°C and the lamination time is 22 min; for another example, the lamination temperature is 1400°C and the lamination time is 8 min.

[0071] In one embodiment, the method for testing the peeling force of the butyl rubber 300 further includes: scratching a plurality of scribing lines 601 from the end of the back plate close to the first end in a direction away from the first end of the laminate assembly, wherein the scribing lines 601 extend from the back plate to the butyl rubber 300 to form a plurality of test strips 600. Figure 4 As shown, a scribe line can be scribed at a preset distance, and the preset distance is adapted to the width of the test sample 600. After the scribe line 601 is scribed, both sides of the scribe line 601 can be used as the test sample 600. Figure 4 In FIG. 6 , the dash line 601 is indicated by a green line.

[0072] Accordingly, step S130 includes: using a tensile testing machine to clamp the end of the flexible back plate 500 in the test specimen 600 close to the first end, and pulling the flexible back plate 500 in a direction away from the first end, so that the flexible back plate 500 in the test specimen 600 drives the butyl rubber 300 in the test specimen 600 to be peeled off from the rigid substrate 100. Figure 4 The arrow in FIG. 5 indicates the direction in which the flexible backing plate 500 in the tensile machine clamping the test specimen 600 moves.

[0073] Accordingly, step S140 includes: determining the peeling force of the butyl rubber 300 based on the tensile force value of the tensile testing machine and the width of the test specimen 600 .

[0074] In the embodiment of the present application, multiple scribing lines 601 are scratched on the laminate assembly to form multiple test specimens 600, and multiple peeling force tests can be performed.

[0075] Scoring the stacked assembly with a plurality of score lines 601 may be performed before lamination or after lamination.

[0076] A plurality of scribe lines 601 are scribed on the laminated assembly to form a plurality of test strips 600. The plurality of test strips 600 are subjected to the same lamination environment and lamination time. The peeling force results measured by the plurality of test strips 600 have a comparative reference, and the test data of the plurality of test strips 600 can also be analyzed to obtain more accurate peeling force parameters.

[0077] The widths of the multiple test strips 600 may be the same or different.

[0078] In one embodiment, the number of the test strips 600 is at least 5; the width of the test strips 600 is d 5-15mm; length of test specimen 600 l 80-150mm.

[0079] The peeling force of the butyl rubber 300 is determined by the peeling force test results of at least 5 test specimens 600, so that the test results are accurate and the test errors are reduced.

[0080] The width and length of the test specimen 600 are set based on the requirements of the test.

[0081] In one embodiment, the tensile testing machine is a tensile testing machine with a temperature regulation function.

[0082] The tensile testing machine has a temperature adjustment function, which makes it possible to test the peeling force of butyl rubber 300 at different ambient temperatures.

[0083] In one example, for a plurality of test specimens 600 of a laminate assembly, the tensile testing machine can be adjusted to pull the flexible backsheet 500 at different temperatures for testing.

[0084] In one embodiment, step S130 includes: using a tensile machine to clamp the end of the flexible back plate 500 in the test specimen 600 close to the first end, and pulling the flexible back plate 500 to move in a direction away from the first end of the flexible back plate 500 at a preset speed; the preset speed is a uniform speed of 90-160 mm / min; the speed error of the preset speed is ±10 mm / min. The tensile machine drives the flexible back plate 500 to move at a uniform speed, so that the tension values ​​at different times are comparable. The preset speed can be determined by setting the parameters of the tensile machine.

[0085] In one embodiment, before step S130, the step further includes: performing an aging treatment on the laminated assembly.

[0086] The aging treatment may be one of high temperature and high humidity aging, dry heat and dry cold aging and UV light aging, with a duration of 500h-6000h.

[0087] After the laminated components are aged, the peeling force of the aged butyl rubber 300 is tested to obtain the peeling force of the butyl rubber 300 when it is used in a harsh environment that is prone to aging, which is conducive to the application and promotion of the butyl rubber 300 in application scenarios in harsh environments.

[0088] The following provides various embodiments of the method for testing the peeling force of butyl rubber provided in the embodiments of the present application to test butyl rubber, as well as comparative examples of testing butyl rubber, and corresponding test results.

[0089] [Example 1] The rigid substrate is embossed glass for photovoltaics, with a size of 300mm×300mm×2mm; the release sheet is a paper sheet; the adhesive film uses a 430g POE film; and the flexible backplane is a CPC backplane.

[0090] Butyl rubbers made of different ingredients were used as samples to test the peeling force. The samples included: sample A, sample B, sample C, and sample D.

[0091] The embossed glass, paper sheet, butyl rubber, POE film, and flexible backplane are stacked in this order to obtain a laminated assembly. The water drop contact angle of the POE film is between 90 degrees and 150 degrees. The paper sheet covers the butyl rubber from 1 / 6 of the distance from the first end to the first end.

[0092] The stacked components were laminated using a laminator at a lamination temperature of 150°C, with negative pressure applied for 5 minutes and pressure maintained for 17 minutes.

[0093] Use a utility knife to cut lines with a length of 150 mm at 10 mm intervals from one end of the flexible back plate close to the release sheet to obtain a test strip with a width of 10 mm and a length of 150 mm.

[0094] The flexible backing plate of the test specimen was horizontally pulled in a direction away from the first end of the butyl rubber at a speed of 100 mm / min using a tensile test machine to test the peeling force of the butyl rubber. The test results are shown in Table 1.

[0095] Table 1. Test results of Example 1

[0096] [Example 2] The only difference from Example 1 is that after lamination and before scoring with a utility knife, the laminated assembly is subjected to an aging treatment for 1000 h in an environment of 85° C. and 85% relative humidity.

[0097] The flexible backing plate of the test specimen was pulled horizontally in a direction away from the first end of the butyl rubber at a speed of 100 mm / min using a tensile test machine to test the peeling force of the butyl rubber. The test results are shown in Table 2.

[0098] Table 2. Test results of Example 2

[0099] From the data in Table 1 and Table 2, it can be seen that the average peel strength of different samples varies greatly, and the failure types include interface failure, cohesive failure, and mixed failure forms of cohesive and interface failure. The test method provided in the embodiment of the present application can be applied to different types of butyl rubber samples, the test results cover a wide range, and the test process conforms to the actual working conditions of butyl rubber, and the failure form is more objective.

[0100] [Example 3] The difference from Example 1 is that the rigid substrate is float glass, the bonding film is an EPE film weighing 410 grams, and the lamination temperature is 146° C. The water drop contact angle of the EPE film is between 90 degrees and 150 degrees.

[0101] Two groups of laminated assembly test pieces were made from each butyl rubber sample in the same batch. One group of laminated assembly test pieces was subjected to aging treatment at 85°C and 85% relative humidity for 1000 hours after lamination and before scoring with a utility knife.

[0102] The test results are shown in Table 3.

[0103] Table 3. Test results of Example 3

[0104] Based on the data in Table 3, it can be shown that the test method provided in the embodiment of the present application can be applicable to different types of butyl rubbers, can use different types of rigid substrates, and the type of adhesive film can be selected flexibly, the operability is strong, and the results are objective and accurate.

[0105] [Comparative Example 1] The rigid substrate is embossed glass for photovoltaics, with a size of 300mm×300mm×2mm; the release sheet is paper; and the flexible backplane is copper foil with a thickness of 1mm.

[0106] Butyl rubbers made of different ingredients were used as samples to test the peeling force. The samples included: sample A, sample B, sample C, and sample D.

[0107] Embossed glass, paper, butyl rubber and copper foil are stacked in this order to obtain a laminated component; the paper covers the butyl rubber from a position 1 / 6 of the distance from the first end to the first end.

[0108] The stacked components were laminated using a laminator at a lamination temperature of 150°C, with negative pressure applied for 5 minutes and pressure maintained for 17 minutes.

[0109] A utility knife was used to scribe lines of 150 mm in length from the end of the flexible back plate close to the first end of the butyl rubber at a spacing of 10 mm to obtain a test strip of 10 mm in width and 150 mm in length.

[0110] The flexible backing plate of the test specimen was pulled horizontally in a direction away from the first end of the butyl rubber at a speed of 100 mm / min using a tensile test machine to test the peeling force of the butyl rubber. The test results are shown in Table 4.

[0111] Table 4. Test results of comparative example 1

[0112] Based on the data in Table 4, it can be shown that due to the debonding caused by insufficient bonding between the butyl rubber and the flexible material (copper foil), the bonding strength between the butyl rubber and the glass interface cannot be tested.

[0113] [Comparative Example 2] The only difference from Comparative Example 1 is: The laminated assembly is obtained by stacking patterned glass, paper, butyl rubber, metal mesh and butyl rubber in sequence. The metal mesh is a 304 stainless steel wire mesh with 80 mesh diamond mesh. The paper covers the butyl rubber from 1 / 6 of the distance from the first end to the first end.

[0114] The test results are shown in Table 5.

[0115] Table 5. Test results of comparative example 2

[0116] Based on the data in Table 5, it can be shown that since the metal wire mesh is embedded in the butyl rubber, the failure forms measured for multiple butyl rubber samples are all cohesive failure, which is inconsistent with the actual working conditions and makes it difficult to perform the peel force test of butyl rubber.

[0117] It should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The orientation words "inside" and "outside" refer to the inside and outside relative to the outline of each component itself. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Therefore, the exemplary term "above..." can include both "above..." and "below..." orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here are interpreted accordingly.

[0118] It should also be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this application refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of this application.

[0119] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0120] It should also be noted that the above are only preferred embodiments of the present application, and the patent protection scope of the present application is not limited thereto. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for testing the peeling force of butyl rubber, characterized in that: include: Stacking a rigid substrate, a release sheet, butyl rubber, an adhesive film and a flexible back sheet in sequence to obtain a laminated assembly; wherein the release sheet is stacked on the rigid substrate and close to the first end of the butyl rubber to isolate the portion of the butyl rubber close to the first end from the rigid substrate, and the adhesive force between the adhesive film and the flexible back sheet is greater than the adhesive force between the butyl rubber and the flexible back sheet; laminating the laminated assembly; The end of the flexible back plate close to the first end is clamped by a tensile machine, and the flexible back plate is pulled in a direction away from the first end, so that the flexible back plate drives the butyl rubber to be peeled off from the rigid substrate; The peeling force of the butyl rubber is determined based on the tensile force value of the tensile testing machine.

2. The method for testing the peeling force of butyl rubber according to claim 1, characterized in that: The water drop contact angle of the adhesive film is 90°-180°; the adhesive film includes a POE film or an EPE film.

3. The method for testing the peeling force of butyl rubber according to claim 1, characterized in that: The flexible back plate is made of metal material or non-metal material; the metal material includes magnesium alloy or aluminum alloy.

4. The method for testing the peeling force of butyl rubber according to claim 1, characterized in that: The laminating of the stacked components comprises: laminating the stacked components in an environment with a temperature of 70° C.-140° C., and the lamination time is 8-22 minutes.

5. The method for testing the peeling force of butyl rubber according to claim 1, characterized in that: Also includes: Scribing the laminate assembly with a plurality of scribe lines from the end of the flexible backsheet close to the first end in a direction away from the first end, wherein the scribe lines extend from the flexible backsheet to the butyl rubber to form a plurality of test specimens; Correspondingly, the method of clamping the end of the flexible back plate close to the first end with a tensile machine and pulling the flexible back plate in a direction away from the first end, wherein the flexible back plate drives the butyl rubber to be peeled off from the rigid substrate, comprises: The end of the flexible back plate in the test specimen close to the first end is clamped by a tensile testing machine, and the flexible back plate is pulled in a direction away from the first end, so that the flexible back plate in the test specimen drives the butyl rubber in the test specimen to be peeled off from the rigid substrate; Accordingly, the step of determining the peeling force of the butyl rubber based on the tensile force value of the tensile testing machine comprises: The peel force of the butyl rubber is determined based on the tensile force value of the tensile testing machine and the width of the test specimen.

6. The method for testing the peeling force of butyl rubber according to claim 5, characterized in that: The number of the test strips is at least 5; the width of the test strips is 5-15 mm; and the length of the test strips is 80-150 mm.

7. The method for testing the peeling force of butyl rubber according to claim 5, characterized in that: The tensile testing machine is a tensile testing machine with a temperature regulating function.

8. The method for testing the peeling force of butyl rubber according to claim 5, characterized in that: The end of the flexible back plate in the test specimen close to the first end is clamped by a tensile testing machine, and the flexible back plate is pulled in a direction away from the first end, so that the flexible back plate in the test specimen drives the butyl rubber in the test specimen to be peeled off from the rigid substrate, comprising: A tensile testing machine is used to clamp the end of the flexible back plate in the test specimen close to the first end, and the flexible back plate is pulled to move at a preset speed toward the direction away from the first end of the flexible back plate; the preset speed is a uniform speed of 90-160 mm / min; the speed error of the preset speed is ±10 mm / min.

9. The method for testing the peeling force of butyl rubber according to any one of claims 1 to 8, characterized in that: The method further comprises: clamping the end of the flexible back plate close to the first end with a tensile machine and pulling the flexible back plate in a direction away from the first end, wherein the flexible back plate drives the butyl rubber to be peeled off from the rigid substrate; The laminate assembly is subjected to an aging treatment.

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