A method for testing the interfacial peeling performance of a double-shot notebook foot pad under the synergistic action of a daily chemical medium and a constant temperature and humidity environment

Abstract

The application provides a kind of daily chemical medium and thermostatic and humid environment synergistic effect under double injection notebook foot pad interface peeling performance test method, it is related to electronic equipment accessory reliability detection technical field, utilize the coating fixture designed to control the coverage of daily chemical medium on the surface of double injection notebook foot pad, and the pressure simulation tooling is simulated, the pressure and exposure state suffered by double injection notebook foot pad when actually used are combined, using thermostatic and humid aging treatment, and using visual inspection, peeling test and failure mode to observe and evaluate double injection notebook foot pad after aging treatment;The application builds close to real multi-factor aging condition, accurately and comprehensively evaluates the long-term interface adhesion reliability of double injection notebook foot pad, and provides scientific and reliable basis for material selection, process optimization and mass production quality control.

Description

Technical Field

[0001] This invention relates to the field of reliability testing technology for electronic device components, and in particular to a method for testing the interface peel performance of dual-element notebook computer feet pads under the synergistic effect of daily chemical media and constant temperature and humidity environment. Background Technology

[0002] Dual-injection molded laptop feet, with their advantages of simultaneously satisfying structural rigidity, anti-slip cushioning, and integrated appearance, have been widely used in the core component field of consumer electronic devices such as laptops and tablets.

[0003] In real-world applications, users' hands and desktops often retain residues of sunscreen, hand cream, lotion, and other daily chemical substances. These substances are rich in oils, surfactants, and organic solvents, which can easily penetrate and intrude into the bonding interface between the soft and hard adhesive layers of the product, causing interface swelling, material aging, and significantly reducing the initial adhesion of the interface.

[0004] Meanwhile, laptop feet are in a constant temperature and humidity environment during storage, transportation, and end-use. High humidity accelerates the moisture absorption and swelling of the soft and hard adhesive interface, leading to continuous deterioration of the interface bonding state. Under the superimposed thermal stress caused by temperature fluctuations, the periodic internal stress generated by the difference in thermal expansion coefficients of the soft and hard adhesive layers further aggravates interface bonding defects, which can easily cause early failure problems such as soft adhesive delamination, edge lifting, and delamination, seriously affecting the service life of the product and the user experience.

[0005] In existing technologies, conventional interface peel strength tests are mostly static mechanical tests conducted in a dry state at room temperature. These tests can only characterize the interface bonding force in the initial state of the product and do not fully consider the combined effects of daily chemical media corrosion and constant temperature and humidity environments. This testing method deviates significantly from the actual service conditions of the product and cannot accurately predict the failure risk after long-term aging of the interface. This can easily lead to batch delamination and after-sales complaints after mass production and delivery of the product, thus restricting the further improvement of the reliability of dual-shot laptop feet products. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a test method for the interface peeling performance of dual-jet notebook feet under the synergistic effect of daily chemical media and constant temperature and humidity environment. By constructing a near-realistic multi-factor aging chemical condition, the long-term interface adhesion reliability of dual-jet notebook feet can be accurately and comprehensively evaluated, providing a scientific and reliable basis for material selection, process optimization, and mass production quality control.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a method for testing the interface peeling performance of dual-ejection notebook feet pads under the synergistic effect of daily chemical media and constant temperature and humidity environment, comprising the following steps: Step 1: Prepare standard specimens. Clean and dry the surface of the standard specimens and assemble them onto the pressure simulation fixture. Step 2: Prepare the chemical medium for testing, apply the selected chemical medium to the surface of the standard sample, and use a coating jig to adjust the coating thickness of the chemical medium. Wait for the chemical medium to penetrate the soft-hard interface of the standard sample to complete the etching process. Step 3: Based on the set simulated weight of the laptop, apply the corresponding clamping force to the standard sample using the pressure simulation fixture, and then place the standard sample together with the pressure simulation fixture in a constant temperature and humidity environment for aging treatment. Step 4: After the aging treatment is completed, remove the pressure simulation fixture and standard sample, let them stand in a standard environment to recover, and remove the standard sample from the pressure simulation fixture. Step 5: Perform an interfacial peel strength test on the restored standard specimen and evaluate the adhesion reliability of the standard specimen.

[0008] Furthermore, the pressure simulation fixture includes a bottom panel, and two mounting brackets are rotatably connected to the upper side panel of the bottom panel. A first groove is opened at the upper end of the mounting bracket, and a fastener is rotatably connected in the first groove. A connecting seat plate is detachably connected to the mounting bracket through the fastener. A second groove is opened on the connecting seat plate corresponding to the first groove. A threaded rod is rotatably connected to the middle position of the connecting seat plate. A rotating connector is fixedly installed on one end of the threaded rod. The rotating connector is rotatably connected to a rotating connecting seat. A connecting frame is fixedly connected to the rotating connecting seat. Two sample mounting seats are installed on the connecting frame. The fastener includes a connecting shaft, which is rotatably mounted in a receiving groove. The connecting shaft is rotatably connected to a bushing disposed in the receiving groove. A threaded rod is rotatably connected to the bushing, and a pressure plate is threaded onto the threaded rod. Furthermore, the sample mounting base includes a mounting plate fixedly mounted on the connecting frame. The side of the mounting plate away from the connecting frame is provided with a sample mounting groove for accommodating a standard sample. Guide grooves for accommodating a coating fixture are provided on the mounting plates on both sides of the sample mounting groove.

[0009] Furthermore, the coating fixture includes a connecting block whose two ends are slidably disposed in a guide groove. The two ends of the connecting block are connected to a side scraping block via a threaded rod. The connecting block and the threaded rod are rotatably connected. The side scraping block and the threaded rod are threadedly connected. Two side scraping blocks are provided, each positioned between the two ends of the connecting block. The threads on the corresponding threaded rods of the two side scraping blocks have opposite directions. Both side scraping blocks are slidably connected to a limiting rod. The two ends of the limiting rod are fixedly connected to the two ends of the connecting block. A top scraping plate is provided between the two side scraping blocks. The two ends of the top scraping plate are slidably inserted into the two side scraping blocks. A threaded rod is connected to the top scraping plate via a connecting frame. The limiting rod and the top scraping plate are fixedly connected. The limiting rod and the threaded rod are rotatably connected. The threaded rod is threadedly connected to the connecting block.

[0010] Furthermore, in step two, specifically: The daily chemical medium is selected from at least one of sunscreen, hand cream, moisturizing lotion or body lotion; The two side scraping blocks are driven by the threaded rod of the rotating coating fixture to move towards or away from each other along the limiting rod to adapt to standard samples of different widths and limit the side coating range. The thickness of the coating of the daily chemical medium on the surface of the standard sample is controlled to be 0.03 mm to 0.08 mm by rotating the threaded rod to drive the top scraper plate to rise and fall. By using the combination of the side scraping block and the top scraping plate, a medium with a thickness of 0.3 mm to 0.5 mm is retained at the end of the standard sample (3); After application, immerse at a constant temperature of 60℃ for 96 hours to allow the chemical medium to fully penetrate the interface between the soft and hard adhesives.

[0011] Furthermore, in step three, specifically: First, based on the set simulated weight of the laptop, the threaded rod of the rotating pressure simulation tool is used to drive the two sample mounting seats to move towards the bottom panel by rotating the connector, rotating the connecting seat and the connecting frame, and applying static pressure matching the weight of the entire laptop to both sides of the standard sample assembled in the sample mounting slot. Then, by rotating the threaded rod, the two sample mounting seats are pressed down, so that the lower surface of the standard sample is pressed onto the bottom panel to simulate the actual use condition where the foot pad is pressed by the machine body and only the edges are exposed. Among them, the pressure applied by the pressure simulation tool is maintained continuously throughout the entire process of constant temperature and humidity aging treatment; Meanwhile, before applying pressure, the tilt angle of the mounting plate can be adjusted, and combined with the overall movable structure limitation of the pressure simulation tooling, static pressure in the tilt direction can be applied to the standard sample to simulate the friction and shear deformation of the feet pads during the handling of a laptop.

[0012] Furthermore, the constant temperature and humidity aging treatment in step three includes: The parameters for constant temperature and humidity aging treatment are: temperature 55℃~65℃, relative humidity 90%~98% RH, and time 72~120 hours. The standard sample with pressure simulation tooling was placed in a constant temperature and humidity test chamber and pressure was continuously applied throughout the aging process.

[0013] Furthermore, in step four, specifically: The standard environmental recovery conditions are: temperature 23℃±5℃, relative humidity 50% RH, and static recovery for 2 hours; After recovery, use a lint-free cloth to gently remove the residual daily chemical medium on the surface of the standard sample (3). Do not move or press the foot pads during the removal process. Next, conduct a visual inspection to observe whether there is peeling, curling, bubbling, or visible gaps at the interface of the standard sample. A feeler gauge was used for auxiliary testing to measure the interface gap. When the gap was greater than 0.05 mm, it was determined that the interface had failed.

[0014] Furthermore, in step five, specifically: The interfacial peel strength test was conducted using a universal testing machine with a 180° peel method and a tensile speed of 100 mm / min. Real-time recording of peel force-displacement curves, statistical analysis of average peel force, and observation of interface failure modes, including interfacial adhesion failure and material cohesive failure. When the peel force-displacement curve shows a smooth fluctuation and the failure surface is cohesive failure, it indicates that the interface adhesion is good.

[0015] Furthermore, in step five, the criterion for determining the adhesive reliability of the standard sample is as follows: If the average peel force is ≥2.0 N / mm, and the interface failure mode is mainly cohesive failure of the material, and the visual inspection and auxiliary inspection in step four do not find visible peeling, curling, or blistering, and the interface gap is ≤0.05 mm, then the interface adhesion reliability of the standard sample is judged to be excellent. If the average peel force is <2.0 N / mm, or the proportion of adhesion failure in the interface failure mode exceeds 50%, or visible peeling, curling, or blistering is found during visual inspection, or the interface gap is >0.05 mm during auxiliary testing, then the interface reliability of the standard sample is deemed insufficient.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are as follows: The present invention controls the coating thickness, side range and end retention of the daily chemical medium by using the coating fixture 2, thereby eliminating random errors caused by manual coating and ensuring the consistency and repeatability of test conditions. This invention couples the daily chemical media erosion treatment with constant temperature and humidity aging treatment in a fixed sequence. Throughout the aging process, the pressure simulation tool 1 applies a vertical static pressure to the sample 3 that matches the weight of the laptop. At the same time, the tilting angle of the mounting plate 12 can be adjusted to apply a tilting static pressure. This realistically simulates the actual working conditions where the feet are pressed tightly by the body and only the edges are exposed to the medium and moisture, as well as the friction and shear deformation during the handling process. This makes up for the shortcomings of traditional dry-state room temperature tests that cannot reflect the synergistic degradation mechanism of medium penetration and humid heat stress. The present invention uses a combination of visual inspection and feeler gauge-assisted inspection after aging, which can quickly identify macroscopic interface failures and avoid invalid data obtained in subsequent peeling tests due to the existence of large-size defects. This invention combines 180° peel test with observation of failure mode to quantitatively characterize the degree of degradation of interface mechanical properties. The smooth fluctuation characteristics of the peel force-displacement curve can be used as a criterion for good interface adhesion. This invention, through clear judgment criteria, accurately distinguishes products with excellent initial adhesion but insufficient resistance to media and high humidity. It provides a scientific basis for material selection, injection molding process optimization, and mass production quality control of dual-shot notebook feet, effectively reducing the risk of after-sales delamination and improving the long-term stability of the product. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a method for testing the interface peeling performance of a dual-ejection notebook foot pad under the synergistic effect of a daily chemical medium and a constant temperature and humidity environment according to the present invention. Figure 2 This is a schematic diagram of the pressure simulation fixture for testing the interface peeling performance of dual-shot notebook feet pads under the synergistic effect of daily chemical media and constant temperature and humidity environment according to the present invention. Figure 3 This is a disassembled diagram of the pressure simulation fixture for testing the interface peeling performance of a dual-shot notebook foot pad under the synergistic effect of a daily chemical medium and a constant temperature and humidity environment, according to the present invention. Figure 4 This is a schematic diagram of the coating fixture for a method of testing the interface peel performance of dual-shot notebook feet pads under the synergistic effect of daily chemical media and constant temperature and humidity environment according to the present invention. Figure 5 This is a schematic diagram of the sample mounting groove for a test method of interface peeling performance of dual-shot notebook feet pads under the synergistic effect of daily chemical media and constant temperature and humidity environment according to the present invention. Figure 6 This is a schematic diagram of the sample mounting groove, coating fixture, and standard sample assembly for a method for testing the interface peel performance of dual-shot notebook foot pads under the synergistic effect of daily chemical media and constant temperature and humidity environment according to the present invention. Figure 7 for Figure 6 Enlarged view of region A in the middle.

[0018] Figure label: 1. Pressure simulation fixture; 2. Coating fixture; 3. Standard sample; 11. Bottom panel; 12. Mounting bracket plate; 13. Container slot one; 14. Fastener; 15. Connecting seat plate; 16. Container slot two; 17. Threaded rod one; 18. Rotary connector; 19. Rotary connecting seat; 110. Connecting frame; 111. Sample mounting seat; 141. Connecting shaft; 142. Bushing; 143. Threaded rod II; 144. Pressure plate; 1111, Mounting base plate; 1112, Guide groove; 1113, Sample mounting groove; 21. Connecting block; 22. Threaded rod three; 23. Side scraping block; 24. Limiting rod; 25. Top scraping plate; 26. Connecting frame; 27. Threaded rod four. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] This invention provides a technical solution: a method for testing the interface peeling performance of dual-shot notebook feet pads under the synergistic effect of daily chemical media and constant temperature and humidity environment. First, a pressure simulation fixture 1, a coating fixture 2, and a standard sample 3 are prepared, and then the test procedure of the standard sample 3 is performed.

[0021] The details are as follows: like Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7As shown, the pressure simulation fixture 1 includes a bottom panel 11. The upper panel of the bottom panel 11 is rotatably connected to two mounting brackets 12. The upper end of the mounting bracket 12 is provided with a first groove 13. A fastener 14 is rotatably connected in the first groove 13. The mounting bracket 12 is detachably connected to a connecting seat plate 15 through the fastener 14. A second groove 16 is provided on the connecting seat plate 15 corresponding to the first groove 13. A threaded rod 17 is rotatably connected to the middle position of the connecting seat plate 15. A rotating connector 18 is fixedly installed on one end of the threaded rod 17. The rotating connector 18 is rotatably connected to a rotating connecting seat 19. A connecting frame 110 is fixedly connected to the rotating connecting seat 19. Two sample mounting seats 111 are installed on the connecting frame 110. In this design, the bottom panel 11 serves as the base of the entire pressure simulation fixture, providing rigid support and positioning reference. It also works with the sample mounting base 111 to apply pressure to the standard sample 3. The two mounting brackets 12 rotatably connected to the upper panel of the bottom panel 11 can change their tilt angle relative to the bottom panel 11 around the rotation axis, thereby providing pressure components in different directions to the sample during subsequent pressure application. The upper end of each mounting plate 12 has a groove 13 for accommodating the fastener 14 and providing a pivot point for its rotation. The fastener 14 is rotatably connected in the groove 13. By rotating the fastener 14, a detachable connection with the connecting seat plate 15 can be achieved. Specifically, when the connecting seat plate 15 is placed above the mounting plate 12, the fastener 14 can rotate to press or release the connecting seat plate 15, completing quick assembly and disassembly. The connecting plate 15 has a second receiving groove 16, which corresponds to the position of the first receiving groove 13. It is used to accommodate the partial structure of the fastener 14 when the fastener 14 is locked, so as to ensure the connection is stable. The rotating connector 18, which is fixedly installed at one end of the threaded rod 17, rotates and engages with the rotating connector 19, converting the rotational motion of the threaded rod 17 into the linear motion of the rotating connector 19. At the same time, the rotational connection between the rotating connector 18 and the rotating connector 19 allows the connecting frame 110 to adapt its angle during movement. The rotating connecting seat 19 is fixedly connected to the connecting frame 110. Two sample mounting seats 111 are installed on the connecting frame 110. Therefore, when the threaded rod 17 is rotated, the connecting frame 110 drives the two sample mounting seats 111 to move synchronously. When the two sample mounting seats 111 move downward, their bottom surfaces press the standard sample 3 located in the sample mounting groove 1113 against the bottom panel 11, thereby applying vertical static pressure to the sample. Meanwhile, since the mounting plate 12 can rotate and tilt, adjusting the angle of the mounting plate 12 before locking the fastener 14 can cause the moving direction of the connecting frame 110 and the sample mounting seat 111 to deviate from the vertical direction, thereby applying a tilting static pressure with a horizontal component to the sample, simulating the friction and shear deformation effect of the foot pad when the laptop is picked up and put down in actual use.

[0022] like Figure 2 and Figure 3 As shown, the fastener 14 includes a connecting shaft 141, which is rotatably installed in the first 13 of the receiving groove. The connecting shaft 141 is rotatably connected to a bushing 142 disposed in the first 13 of the receiving groove. A threaded rod 143 is rotatably connected to the bushing 142, and a pressure plate 144 is threadedly connected to the threaded rod 143. In this design, after the connecting seat plate 15 is placed on the upper end of the mounting bracket plate 12, the fastener 14 is rotated so that the pressure plate 144 is located above the connecting seat plate 15. Then, the threaded rod 143 is rotated to drive the pressure plate 144 to move downward until the pressure plate 144 presses against the upper surface of the connecting seat plate 15. The pressure is maintained by the self-locking of the thread, so as to achieve the detachable fixing of the connecting seat plate 15 and the mounting bracket plate 12. Rotate the threaded rod 143 in the opposite direction to raise the pressure plate 144, and then rotate the fastener 14 to release the connecting seat plate 15.

[0023] like Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, the sample mounting base 111 includes a mounting base plate 1111 fixedly mounted on the connecting frame 110. The side of the mounting base plate 1111 away from the connecting frame 110 is provided with a sample mounting groove 1113 for accommodating the standard sample 3. The mounting base plate 1111 on both sides of the sample mounting groove 1113 is provided with guide grooves 1112 for accommodating the coating fixture 2. In this design, the mounting plate 1111 is fixedly mounted on the connecting frame 110, so that the mounting plate 1111 moves synchronously with the connecting frame 110. The mounting plate 1111 has a sample mounting groove 1113 on one side away from the connecting frame 110. The sample mounting groove 1113 is a recessed structure, and its outline matches the shape of the standard sample 3. It is used to accommodate and position the standard sample 3. The standard sample 3 is fixed in the sample mounting groove 1113 by adhesive. The bottom surface of the sample mounting groove 1113 provides support, and the side restricts the displacement of the sample in the horizontal direction. Guide grooves 1112 are provided on the mounting base plates 1111 on both sides of the sample mounting groove 1113. The guide grooves 1112 are straight grooves, and their width matches the dimensions of the two ends of the connecting block 21 of the coating fixture 2. The guide grooves 1112 are used to accommodate the coating fixture 2 and allow the coating fixture 2 to slide along the guide grooves 1112, thereby ensuring that the trajectory of the coating fixture 2 is straight and its relative position with the standard sample 3 remains constant when it moves above the surface of the standard sample 3, so as to achieve uniform control of the coating thickness of the daily chemical medium.

[0024] like Figure 4 , Figure 6 and Figure 7 As shown, the coating fixture 2 includes a connecting block 21 whose two ends are slidably disposed within a guide groove 1112. The two ends of the connecting block 21 are connected to side scraping blocks 23 via threaded rods 22. The connecting block 21 and the threaded rods 22 are rotatably connected, and the side scraping blocks 23 are threadedly connected to the threaded rods 22. Two side scraping blocks 23 are provided, and both side scraping blocks 23 are disposed between the two ends of the connecting block 21. The threads on the corresponding threaded rods 22 of the two side scraping blocks 23 are in opposite directions. Both sides of the scraping blocks 23 are slidably connected to the limiting rod 24. The two ends of the limiting rod 24 are fixedly connected to the two ends of the connecting block 21. A top scraping plate 25 is provided between the two side scraping blocks 23. The two ends of the top scraping plate 25 are slidably inserted into the two side scraping blocks 23. A threaded rod 27 is connected to the top scraping plate 25 through the connecting frame 26. The limiting rod 24 is fixedly connected to the top scraping plate 25. The limiting rod 24 is rotatably connected to the threaded rod 27. The threaded rod 27 is threadedly connected to the connecting block 21. In this design, the two ends of the connecting block 21 are slidably set in the guide groove 1112 of the sample mounting base 111. The connecting block 21, as the overall bearing base, can move along the guide groove 1112 to adjust the coating position. The two ends of the connecting block 21 are connected to two side scraping blocks 23 via threaded rod 3 22. The rotatable connection between the connecting block 21 and the threaded rod 3 22 allows the threaded rod 3 22 to rotate relative to the connecting block 21 without axial displacement. The side scraping blocks 23 are threadedly connected to the threaded rod 3 22. At the same time, the threads on the threaded rod 3 22 corresponding to the two side scraping blocks 23 are opposite in direction. Therefore, when the threaded rod 3 22 is rotated, the two side scraping blocks 23 move synchronously in opposite directions or in opposite directions along the axial direction of the threaded rod 3 22, thereby adapting to standard samples 3 of different widths and defining the side coating boundary of the daily chemical medium. Both side scraping blocks 23 are slidably connected to the limiting rod 24. The two ends of the limiting rod 24 are fixedly connected to the two ends of the connecting block 21 respectively. The limiting rod 24 provides guidance for the side scraping blocks 23 and constrains their movement direction to prevent the side scraping blocks 23 from deflecting during movement. A top scraping plate 25 is provided between the two side scraping blocks 23. The two ends of the top scraping plate 25 are slidably inserted into the two side scraping blocks 23, so that the top scraping plate 25 can be raised and lowered relative to the side scraping blocks 23 in the vertical direction. A threaded rod 27 is connected to the top scraping plate 25 via a connecting frame 26. A limiting rod 24 is fixedly connected to the top scraping plate 25, and a rotatable connection is made between the limiting rod 24 and the threaded rod 27. The threaded rod 27 is threadedly connected to the connecting block 21. When the threaded rod 27 is rotated, due to the threaded engagement between the threaded rod 27 and the connecting block 21 and the fixed connection between the limiting rod 24 and the top scraping plate 25, the rotational motion of the threaded rod 27 is converted into the vertical translation of the top scraping plate 25. At the same time, the limiting rod 24 rises and falls with the top scraping plate 25. The rotatable connection between the limiting rod 24 and the threaded rod 27 allows the threaded rod 27 to rotate without causing the limiting rod 24 to rotate. When the top scraper plate 25 descends, it contacts the daily chemical medium applied to the sample surface. The thickness of the medium layer is limited by controlling the gap between the lower surface of the top scraper plate 25 and the upper surface of the sample. The inner sidewall of the side scraper block 23 limits the lateral width of the medium layer. The two work together to achieve precise quantitative application of the daily chemical medium on the sample surface.

[0025] like Figures 1 to 7 As shown, the test procedure for standard sample 3 includes the following steps: Step 1: Prepare standard sample 3. Clean and dry the surface of standard sample 3, and assemble standard sample 3 onto pressure simulation fixture 1. Specifically: The surface of standard sample 3 was cleaned by rinsing with clean water to avoid impurities on the surface of standard sample 3 from blocking the direct contact between the medium and the sample surface or interfering with the penetration path of the medium to the interface between the soft and hard adhesives during the subsequent corrosion process of daily chemical media. Then, after rinsing, let it stand and air dry at room temperature to allow the moisture absorbed on the surface and inside of standard sample 3 to evaporate naturally. Room temperature conditions avoid high-temperature drying from causing thermal stress or inducing interface pre-aging in the double-shot molding material, and ensure that the initial interface state of the sample is not affected by the cleaning process. Then, the standard sample 3 is pasted into the sample mounting groove 1113. The outline of the sample mounting groove 1113 matches the shape of the standard sample 3. The pasting and fixing method ensures that the standard sample 3 maintains a constant position during the application of daily chemical medium by the coating fixture 2 and the subsequent pressure simulation fixture 1, preventing sample displacement that could lead to uneven medium application or pressure distribution deviation, thereby ensuring the repeatability of test conditions and the accuracy of test results.

[0026] Step 2: Prepare the testing medium. The medium is selected from at least one of sunscreen, hand cream, moisturizing lotion, or body lotion. Apply the selected medium to the surface of standard sample 3, and adjust the thickness of the medium application using coating fixture 2. Once the medium has penetrated the interface between the soft and hard surfaces of standard sample 3, the etching process is complete. Specifically: First, the two side scraping blocks 23 are driven to move towards or away from each other along the limiting rod 24 by the threaded rod 22 of the rotating coating fixture 2, adapting to standard samples 3 of different widths and limiting the side coating range. During this process, when the threaded rod 22 of the rotating coating fixture 2 is rotated, since the threaded rod 22 is rotatably connected to the connecting block 21 and threadedly connected to the two side scraping blocks 23, and the thread directions on the threaded rod 22 corresponding to the two side scraping blocks 23 are opposite, the rotational motion of the threaded rod 22 is converted into the linear motion of the two side scraping blocks 23 towards or away from each other along the limiting rod 24. The two ends of the limiting rod 24 are fixed to the connecting block 21, providing guidance and constraint for the side scraping blocks 23. By adjusting the distance between the two side scraping blocks 23 to match the actual width of the dual-shot notebook foot pad standard sample 3, the side coating range of the daily chemical medium in the sample width direction is limited, avoiding the medium from overflowing into non-test areas and causing edge stress concentration or uneven coating. Then, by rotating the threaded rod 27, the top scraper 25 is driven to rise and fall, controlling the coating thickness of the daily chemical medium on the surface of the standard sample 3 to be 0.03 mm to 0.08 mm. During this process, the threaded rod 27 is threadedly connected to the connecting block 21 and rotatably connected to the limiting rod 24. The limiting rod 24 is fixedly connected to the top scraper 25. Therefore, the rotational movement of the threaded rod 27 drives the top scraper 25 to rise and fall vertically relative to the side scraper block 23. The gap between the lower surface of the top scraper 25 and the upper surface of the sample determines the coating thickness of the daily chemical medium. By controlling the coating thickness within the range of 0.03 mm to 0.08 mm, this thickness ensures that the medium fully covers the sample surface without causing the interface penetration conditions to deviate from the actual use scenario due to excessive accumulation. Then, through the cooperation of the side scraping block 23 and the top scraping plate 25, a medium with a thickness of 0.3 mm to 0.5 mm is retained at the end of the standard sample 3. During this process, through the cooperation of the inner wall of the side scraping block 23 with the lower surface and end edge of the top scraping plate 25, a medium with a thickness of 0.3 mm to 0.5 mm is retained in the support surface area of ​​the standard sample 3, simulating the phenomenon of natural accumulation of daily chemical media at the edge of the foot pad in actual use, and avoiding underestimation of the degree of interface erosion under real working conditions due to the edge medium being too thin. After the coating is completed, the standard sample 3 is immersed in a constant temperature of 60°C for 96 hours to allow the chemical medium to fully penetrate into the interface between the hard and soft adhesive layers of the standard sample 3. During this process, the standard sample 3 is immersed in a constant temperature of 60°C for 96 hours after the coating is completed. The constant temperature environment of 60°C accelerates the molecular thermal motion of the active ingredients in the chemical medium, reduces the viscosity of the medium and increases its penetration rate, so that the medium can fully penetrate the interface between the hard substrate and the soft elastic adhesive layer of the standard sample 3 within 96 hours, simulating the deterioration effect of the gradual accumulation of chemical medium on the interface adhesion performance during long-term use. Step 3: Based on the set simulated weight of the laptop, apply the corresponding clamping force to the standard sample 3 using the pressure simulation fixture 1. Then, place the standard sample 3 together with the pressure simulation fixture 1 in a constant temperature and humidity environment for aging treatment, wherein: First, based on the set simulated weight of the laptop, the threaded rod 17 of the rotating pressure simulation fixture 1 is used to drive the two sample mounting seats 111 to move towards the bottom panel 11 via the rotating connector 18, rotating connecting seat 19, and connecting frame 110. This applies static pressure matching the weight of the entire laptop to both sides of the standard sample 3 assembled in the sample mounting groove 1113. During this process, when the threaded rod 17 of the rotating pressure simulation fixture 1 is rotated, the rotating connector 18, which is rotatably connected to the connecting seat plate 15 and whose one end is fixedly mounted, rotates in cooperation with the rotating connecting seat 19, thus controlling the rotational movement of the threaded rod 17. The rotational joint between the rotating connector 18 and the rotating connector 19 is converted into a linear displacement of the rotating connector 19 along the axial direction of the threaded rod 17. The rotating connector 19 is fixedly connected to the connecting frame 110, and the two sample mounting seats 111 installed on the connecting frame 110 move synchronously. Therefore, rotating the threaded rod 17 can drive the two sample mounting seats 111 to move towards the bottom panel 11, so that the standard sample 3 assembled in the sample mounting groove 1113 is subjected to static pressure on both sides that matches the weight of the entire laptop. This pressure value is determined by gravity conversion based on the actual mass of the laptop, simulating the static load of the foot pad bearing the weight of the body. Then, by rotating the threaded rod 17, the two sample mounting seats 111 are pressed down, so that the lower surface of the standard sample 3 is pressed onto the bottom panel 11, to simulate the working condition in actual use where the foot pad is pressed by the body and only the edge is exposed. During this process, rotating the threaded rod 17 further presses down the two sample mounting seats 111, and the lower surface of the standard sample 3 is pressed onto the upper surface of the bottom panel 11. At this time, the upper surface of the standard sample 3 is covered by the bottom surface of the sample mounting groove 1113, and the lower surface is in contact with the bottom panel 11. Only the side edge of the standard sample 3 is exposed to the external environment, accurately simulating the working condition in actual use where the laptop foot pad is pressed by the body and only the edge is in contact with the external daily chemical media and moisture. The pressure applied by the pressure simulation fixture 1 was maintained continuously throughout the entire constant temperature and humidity aging process. The parameters for the constant temperature and humidity aging process were: temperature 55℃~65℃, relative humidity 90%~98% RH, and time 72~120 hours. The standard sample 3 with the pressure simulation fixture 1 was placed in the constant temperature and humidity test chamber, and pressure was continuously applied throughout the aging process. During this process, by keeping the rotation angle of the threaded rod 17 unchanged and relying on the self-locking characteristic of the thread, the pressure simulation fixture 1 continuously applied the above static pressure. The aging parameters were set as follows: temperature 55℃ to 65℃, relative humidity 90% to 98% RH, and time 72 to 120 hours. The standard sample 3 with the pressure simulation fixture 1 was placed in the constant temperature and humidity test chamber. The high temperature and high humidity environment promoted the penetration of the chemical medium into the deep layer of the interface and the hydrolysis and swelling of the soft and hard rubber materials. The continuous pressure action simulated the synergistic deterioration effect of pressure and humid heat environment in real use. Before applying pressure, the tilt angle of the mounting plate 12 can be adjusted, and combined with the overall movable structure restriction of the pressure simulation fixture 1, a static pressure in the tilt direction can be applied to the standard sample 3 to simulate the friction and shear deformation of the feet during the handling of a laptop. In this process, by adjusting the tilt angle of the mounting plate 12 relative to the bottom panel 11, and combined with the movable structure restriction of the pressure simulation fixture 1 including the rotational degree of freedom between the rotating connector 18 and the rotating connector 19 and the detachable connection between the fastener 14 and the connecting seat plate 15, the driving direction of the threaded rod 17 is deviated from the vertical direction, thereby applying a static pressure in the tilt direction with a horizontal component to the standard sample 3. This tilt pressure causes the standard sample 3 to bear shear force along the sample surface while being vertically pressed, simulating the friction and shear deformation of the feet caused by the tilt or sliding of the laptop body during handling, and more realistically restoring the interface stress state under dynamic use conditions. Step 4: After the aging treatment is completed, remove the pressure simulation fixture 1 and standard sample 3, and allow them to stand and recover in a standard environment. The conditions for standard environmental recovery are: temperature 23℃±5℃, relative humidity 50% RH, and standing for 2 hours. Then, remove the standard sample 3 from the pressure simulation fixture 1. After recovery, the residual daily chemical media on the surface of the standard sample 3 is gently removed with a lint-free cloth. During the removal process, the foot pads are not moved or pressed. During this process, the pressure simulation fixture 1 after aging treatment is removed from the constant temperature and humidity test chamber, the fastener 14 is removed and the connecting seat plate 15 is separated from the mounting plate 12. The dual-shot notebook foot pad standard sample 3 is taken out from the sample mounting slot 1113 of the sample mounting seat 111. After resting for 2 hours in a standard environment of 23℃±5℃ and 50%RH relative humidity, the residual daily chemical media on the surface of the standard sample 3 is gently wiped with a lint-free cloth. The lint-free cloth is made of non-woven fabric or microfiber cloth, and its surface does not contain adhesives or hard particles. During the removal process, the medium is adsorbed by slight contact between the lint-free cloth and the sample surface and capillary action. No additional moving or pressing action is applied to avoid mechanical external force causing secondary damage to the aged soft and hard adhesive interface or artificially inducing additional peeling. This ensures that the subsequent test results only reflect the real interface damage under the synergistic effect of daily chemical media and constant temperature and humidity. Next, visual inspection is carried out to observe whether peeling, curling, bubbling or visible gaps appear at the interface of standard sample 3. During this process, the test light source can be a white LED light with a color temperature of 5000K to 6500K, and the observation angle is 45° to 90°. The inspector directly observes the soft and hard adhesive bonding edge and interface area of ​​standard sample 3 and records whether there are failure phenomena such as interface separation, soft adhesive edge curling off the substrate, local bulging of the interface area forming bubbles or continuous visible gaps. The principle of visual inspection is based on the visual contrast formed by the difference in reflection and refraction of light at the interface defect. The defect-free interface presents a uniform appearance, while the peeling or curling area will produce obvious bright lines or shadows due to the presence of air gaps. Then, a feeler gauge is used for auxiliary testing to measure the interface gap. When the gap is greater than 0.05 mm, it is determined that the interface has failed. In this process, the feeler gauge is a standard thickness gauge with thickness specifications including 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, etc. The thin end of the feeler gauge is inserted parallel to the soft and hard rubber interface gap of the standard sample 3. When the feeler gauge can be inserted without obstruction and the insertion depth exceeds 2 mm, the thickness value of the feeler gauge is recorded as the interface gap measurement result. When the measured gap is greater than 0.05 mm, it is determined that the interface has failed. The basis for setting this judgment threshold is: the initial interface gap of the double-shot molded foot pad is usually less than 0.02 mm under no-load conditions. A gap of 0.05 mm corresponds to a critical state where the interface adhesion force has decreased significantly and moisture and media can further penetrate along the gap. Exceeding this value indicates that the interface deterioration is irreversible. Step 5: Perform an interfacial peel strength test on the restored standard specimen 3 and evaluate the adhesive reliability of the standard specimen 3, wherein: The interfacial peel strength test was conducted using a universal testing machine with a 180° peel angle and a tensile speed of 100 mm / min. Specifically, the standard sample 3, after being restored and the residual medium removed, was fixed in the lower clamp of the testing machine, and the free end of the soft elastic adhesive layer was clamped in the upper clamp. The peel angle was set to 180° and the tensile speed to 100 mm / min. After the testing machine was started, the upper clamp moved upward at a constant speed, peeling the soft adhesive layer from the surface of the hard substrate in a folding manner. The 180° peel angle ensured that the peel force direction was parallel to the peel interface, so that the measured force value directly reflected the interfacial adhesion strength. The peel force-displacement curve is recorded in real time, the average peel force is calculated, and the interface failure morphology is observed. The failure morphology includes interfacial adhesion failure and material cohesive failure. Specifically, the force sensor and displacement sensor built into the universal testing machine record the peel force and corresponding displacement data in real time at a sampling frequency of no less than 50 times per second, generating a peel force-displacement curve. After the test, the force values ​​in the peeling stage of the curve are arithmetically averaged to obtain the average peel force. At the same time, the interface failure morphology is observed and recorded during and after the peeling process. Interfacial adhesion failure refers to failure occurring at the interface between the soft adhesive layer and the hard substrate. After peeling, there is no residual adhesive on the surface of the soft adhesive layer and no soft adhesive adhering to the surface of the hard substrate, presenting a smooth separation surface, indicating that the interfacial adhesion force is lower than the material strength itself. Material cohesive failure refers to failure occurring inside the soft adhesive layer or on the surface of the hard substrate. After peeling, the fracture surface of the soft adhesive layer remains on the surface of the hard substrate, or the fractured soft adhesive material is attached to the surface of the hard substrate, indicating that the interfacial adhesion force is higher than the cohesive strength of the soft or hard adhesive. When the peel force-displacement curve shows a steady fluctuation and the failure surface is cohesive failure, it indicates good interfacial adhesion. Specifically, when the peel force-displacement curve shows a steady fluctuation with a small periodic fluctuation around the average value rather than violent oscillation or continuous decline, and the failure surface is mainly cohesive failure of the material, that is, when the cohesive failure accounts for more than 70% of the failure area, it indicates good interfacial adhesion. Furthermore, the criteria for determining the adhesive reliability of standard sample 3 are as follows: If the average peel force is ≥2.0 N / mm, and the interface failure mode is mainly cohesive failure of the material, and the visual inspection and auxiliary inspection in step four do not find visible peeling, curling, or blistering, and the interface gap is ≤0.05 mm, then the interface adhesion reliability of the standard sample 3 is judged to be excellent. If the average peel force is <2.0 N / mm, or the proportion of adhesion failure in the interface failure mode exceeds 50%, or visible peeling, curling, or blistering is found by visual inspection, or the interface gap is >0.05 mm by auxiliary inspection, then the interface reliability of the standard sample 3 is deemed insufficient. In the adhesion reliability judgment criteria for standard sample 3, the peel force threshold of 2.0 N / mm is derived from the initial peel strength benchmark value of 2.5-3.0 N / mm for dual-shot notebook feet in an unaged state. Considering the inevitable interface performance degradation caused by daily chemical media erosion and humid heat aging, the lower limit of the initial peel strength benchmark value is taken as the qualified boundary. Below the initial peel strength benchmark value, it indicates that the interface has lost sufficient anti-peel ability. The interface failure mode is mainly cohesive failure, which proves that the interface bonding strength between the soft and hard adhesives exceeds the fracture strength of the soft adhesive layer or the hard substrate layer itself. That is, the adhesive force is greater than the cohesive strength of the material. At this time, the failure location shifts to the interior of the material rather than the interface, which is direct evidence of good interface fusion. At the same time, visual inspection shows no visible peeling, curling, or blistering, and the auxiliary inspection gap is ≤0.05 mm, indicating that the soft and hard adhesive bonding edge remains intact and continuous on a macro scale, without gaps caused by media swelling or thermal stress. The 0.05 mm gap threshold is based on the statistical upper limit of the initial interface gap of the dual-shot molding process, which is usually ≤0.02 mm. The failure threshold and the average peel force are combined to determine the failure threshold. Conversely, if the average peel force is less than 2.0 N / mm, or the proportion of adhesion failure in the interface failure mode exceeds 50%, or visible peeling, lifting, or blistering are found during visual inspection, or the interface gap is greater than 0.05 mm during auxiliary inspection, the interface reliability of the sample is deemed insufficient. If any one of these conditions is met, it indicates that the synergistic effect of the daily chemical medium and constant temperature and humidity has caused unacceptable damage to the interface, and the product is at risk of early debonding, delamination, or lifting during actual use. Example 1

[0027] Use SPF50+ sunscreen to combat erosion coupled with humid and heat aging: Standard sample 3 for double-shot molded laptop feet was selected. The hard substrate was made of PC / ABS material, and the soft elastic adhesive layer was made of TPU material. The size of standard sample 3 was approximately 320×10×1.8mm. There were no less than 2 standard samples 3 in each group. After rinsing the surface of the standard sample 3 with clean water, let it air dry at room temperature, and then paste the standard sample 3 into the sample mounting groove 1113 of the pressure simulation tooling 1. SPF50+ sunscreen was used as the daily chemical medium. The sunscreen was applied to the surface of standard sample 3, and the thickness was controlled using coating fixture 2: rotating threaded rod 3 22 drove the two side scraping blocks 23 to move along the limiting rod 24 to match the width of standard sample 3; rotating threaded rod 4 27 drove the top scraping plate 25 to rise and fall, controlling the coating thickness to 0.05mm; through the cooperation of the side scraping blocks 23 and the top scraping plate 25, a 0.4mm thick medium was left at the end of sample 3; after coating, it was immersed at a constant temperature of 60℃ for 96 hours. The standard sample 3, together with the pressure simulation fixture 1, was placed in a constant temperature and humidity test chamber. The temperature was set to 60℃, the relative humidity to 95%RH, and the aging time to 96 hours. Throughout the aging process, the lower surface of the standard sample 3 was pressed onto the bottom panel 11 by rotating the threaded rod 17, applying static pressure matching the weight of the entire laptop. After aging is complete, remove the product and let it stand for 2 hours in a standard environment of 23℃±5℃ and 50%RH relative humidity. Then, gently remove any residual media with a lint-free cloth. Visual inspection and feeler gauge-assisted inspection revealed no peeling, warping, or bubbling, and the interface gap was ≤0.05mm. Peeling tests were conducted using a universal testing machine at a 180° peel angle and a tensile speed of 100 mm / min. The average peel force was 2.7 N / mm, and the failure mode was mainly cohesive failure of the material. The standard sample 3 was found to have excellent interfacial adhesion reliability, indicating that the material is compatible with the injection molding process and has stable resistance to corrosion from chemical media. Example 2

[0028] Use a high-oil breakup cream to couple erosion with humid heat aging: Standard sample 3 was prepared according to the method of Example 1. The daily chemical medium was replaced with a high-oil hand cream containing petrolatum and mineral oil. The coating thickness was controlled at 0.06 mm, and the end thickness was 0.4 mm. The immersion conditions were 60°C / 96 hours. The constant temperature and humidity aging conditions were 60℃, 95%RH, and 96 hours, with vertical static pressure applied by pressure simulation fixture 1. After cleaning, visual inspection revealed that 3 out of 10 standard samples 3 had edge curling or peeling, and the maximum gap measured by feeler gauge was 0.12 mm. Peel test results showed an average peel force of 1.1 N / mm, with adhesive failure accounting for approximately 70% of the failure modes. The reliability of the interface of the standard sample 3 was deemed insufficient. The reason for this was that the high oil content medium had a stronger corrosive effect on the TPE / PC interface, and it was necessary to increase the mold temperature, injection pressure, or holding pressure to improve the interface bonding. Example 3

[0029] A refreshing water-based moisturizing lotion was selected for erosion coupled with humid heat aging: Standard sample 3 was prepared according to the method in Example 1. The daily chemical medium was replaced with a water-in-oil type refreshing moisturizing emulsion. The coating thickness was controlled at 0.04 mm, and the end thickness was 0.3 mm. The immersion conditions were 60°C / 96 hours. The constant temperature and humidity aging conditions were 60°C, 95%RH, and 96 hours. After cleaning, visual inspection and feeler gauge testing showed that all standard samples 3 were free of failure, with an average peel force of 2.5 N / mm and a failure mode of cohesive failure. The interfacial adhesion was deemed to be of excellent reliability. Analysis showed that the erosion by aqueous media was relatively weak, but the humid and hot environment would still accelerate the interfacial hydrolysis. Coupled testing is necessary for a comprehensive evaluation.

[0030] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments that can be applied to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A method for testing the interface peeling performance of dual-shot notebook feet pads under the synergistic effect of a daily chemical medium and a constant temperature and humidity environment, characterized in that, Includes the following steps: Step 1: Prepare standard sample (3), clean and dry the surface of standard sample (3), and assemble standard sample (3) on pressure simulation fixture (1); Step 2: Prepare the chemical medium for testing, apply the selected chemical medium to the surface of the standard sample (3), and use the coating jig (2) to adjust the coating thickness of the chemical medium. After the chemical medium has penetrated the soft and hard interface of the standard sample (3), the erosion treatment is completed. Step 3: According to the set simulated weight of the notebook, apply the corresponding clamping force to the standard sample (3) through the pressure simulation fixture (1), and then place the standard sample (3) together with the pressure simulation fixture (1) in a constant temperature and humidity environment for aging treatment. Step 4: After the aging treatment is completed, remove the pressure simulation fixture (1) and the standard sample (3), let them stand in a standard environment to recover, and remove the standard sample (3) from the pressure simulation fixture (1). Step 5: Perform an interfacial peel strength test on the restored standard sample (3) and evaluate the adhesion reliability of the standard sample (3).

2. The method for testing the interface peel performance of dual-shot notebook feet pads under the synergistic effect of daily chemical media and constant temperature and humidity environment as described in claim 1, characterized in that: The pressure simulation fixture (1) includes a bottom panel (11). The upper panel of the bottom panel (11) is rotatably connected to two mounting brackets (12). The upper end of the mounting bracket (12) is provided with a first groove (13). A fastener (14) is rotatably connected in the first groove (13). The mounting bracket (12) is detachably connected to a connecting seat plate (15) through the fastener (14). The connecting seat plate (15) corresponding to the first groove (13) is provided with a second groove (16). A threaded rod (17) is rotatably connected in the middle of the connecting seat plate (15). A rotating connector (18) is fixedly installed on one end of the threaded rod (17). The rotating connector (18) is rotatably connected to a rotating connecting seat (19). A connecting frame (110) is fixedly connected to the rotating connecting seat (19). Two sample mounting seats (111) are installed on the connecting frame (110). The fastener (14) includes a connecting shaft (141), which is rotatably installed in a first accommodating groove (13). The connecting shaft (141) is rotatably connected to a bushing (142) disposed in the first accommodating groove (13). A second threaded rod (143) is rotatably connected to the bushing (142), and a pressure plate (144) is threaded onto the second threaded rod (143). Furthermore, the sample mounting base (111) includes a mounting base plate (1111) fixedly mounted on the connecting frame (110). The mounting base plate (1111) has a sample mounting groove (1113) for accommodating the standard sample (3) on one side away from the connecting frame (110). The mounting base plate (1111) on both sides of the sample mounting groove (1113) has guide grooves (1112) for accommodating the coating fixture (2).

3. The method for testing the interface peel performance of dual-shot notebook feet pads under the synergistic effect of daily chemical media and constant temperature and humidity environment as described in claim 1, characterized in that: The coating fixture (2) includes a connecting block (21) whose two ends are slidably disposed in a guide groove (1112). The two ends of the connecting block (21) are connected to side scraping blocks (23) via threaded rods (22). The connecting block (21) and the threaded rods (22) are rotatably connected. The side scraping blocks (23) are threadedly connected to the threaded rods (22). Two side scraping blocks (23) are provided, and both are disposed between the two ends of the connecting block (21). The thread directions on the threaded rods (22) corresponding to the two side scraping blocks (23) are opposite. 3) All are slidably connected to the limiting rod (24). The two ends of the limiting rod (24) are fixedly connected to the two ends of the connecting block (21). A top scraping plate (25) is provided between the two side scraping blocks (23). The two ends of the top scraping plate (25) are slidably inserted into the two side scraping blocks (23). A threaded rod four (27) is connected to the top scraping plate (25) through the connecting frame (26). The limiting rod (24) is fixedly connected to the top scraping plate (25). The limiting rod (24) is rotatably connected to the threaded rod four (27). The threaded rod four (27) is threadedly connected to the connecting block (21).

4. The method for testing the interface peel performance of dual-shot notebook feet pads under the synergistic effect of daily chemical media and constant temperature and humidity environment as described in claim 3, characterized in that: In step two, specifically: The daily chemical medium is selected from at least one of sunscreen, hand cream, moisturizing lotion or body lotion; The two side scraping blocks (23) are driven to move towards or away from each other along the limiting rod (24) by the threaded rod three (22) of the rotating coating fixture (2) to adapt to standard samples (3) of different widths and limit the side coating range; The top scraper plate (25) is raised and lowered by rotating the threaded rod four (27), and the coating thickness of the daily chemical medium on the surface of the standard sample (3) is controlled to be 0.03 mm to 0.08 mm. By using the side scraping block (23) and the top scraping plate (25) together, a medium with a thickness of 0.3 mm to 0.5 mm is retained at the end of the standard sample (3); After application, immerse at a constant temperature of 60℃ for 96 hours to allow the chemical medium to fully penetrate the interface between the soft and hard adhesives.

5. The method for testing the interface peeling performance of dual-shot notebook feet pads under the synergistic effect of daily chemical media and constant temperature and humidity environment as described in claim 2, characterized in that: In step three, specifically: First, based on the set simulated weight of the laptop, the threaded rod (17) of the rotating pressure simulation tool (1) is rotated, and the two sample mounting seats (111) are driven to move towards the bottom panel (11) by rotating the connector (18), rotating the connecting seat (19) and connecting frame (110), and applying static pressure matching the weight of the laptop to both sides of the standard sample (3) assembled in the sample mounting groove (1113). Then, by rotating the threaded rod (17), the two sample mounting seats (111) are pressed down, so that the lower surface of the standard sample (3) is pressed onto the bottom panel (11) to simulate the working condition in actual use where the foot pad is pressed by the body and only the edges are exposed. Among them, the pressure applied by the pressure simulation tool (1) is maintained continuously throughout the entire process of constant temperature and humidity aging treatment; Meanwhile, before applying pressure, the tilt angle of the mounting plate (12) can be adjusted, and combined with the overall movable structure restriction of the pressure simulation fixture (1), static pressure in the tilt direction can be applied to the standard sample (3) to simulate the friction and shear deformation of the foot pad during the handling of the laptop.

6. The method for testing the interface peel performance of dual-shot notebook feet pads under the synergistic effect of daily chemical media and constant temperature and humidity environment as described in claim 1, characterized in that: The constant temperature and humidity aging treatment in step three includes: The parameters for constant temperature and humidity aging treatment are: temperature 55℃~65℃, relative humidity 90%~98% RH, and time 72~120 hours. The standard sample (3) of the pressure simulation tool (1) was placed in a constant temperature and humidity test chamber and pressure was continuously applied throughout the aging process.

7. The method for testing the interface peel performance of dual-shot notebook feet pads under the synergistic effect of daily chemical media and constant temperature and humidity environment as described in claim 1, characterized in that: In step four, specifically: The standard environmental recovery conditions are: temperature 23℃±5℃, relative humidity 50% RH, and static recovery for 2 hours; After recovery, use a lint-free cloth to gently remove the residual daily chemical medium on the surface of the standard sample (3). Do not move or press the foot pads during the removal process. Then conduct a visual inspection to observe whether peeling, curling, bubbling or visible gaps appear on the interface of the standard sample (3); A feeler gauge was used for auxiliary testing to measure the interface gap. When the gap was greater than 0.05 mm, it was determined that the interface had failed.

8. The method for testing the interface peeling performance of dual-shot notebook feet pads under the synergistic effect of daily chemical media and constant temperature and humidity environment as described in claim 1, characterized in that: In step five, specifically: The interfacial peel strength test was conducted using a universal testing machine with a 180° peel method and a tensile speed of 100 mm / min. Real-time recording of peel force-displacement curves, statistical analysis of average peel force, and observation of interface failure modes, including interfacial adhesion failure and material cohesive failure. When the peel force-displacement curve shows a smooth fluctuation and the failure surface is cohesive failure, it indicates that the interface adhesion is good.

9. The method for testing the interface peel performance of dual-shot notebook feet pads under the synergistic effect of daily chemical media and constant temperature and humidity environment as described in claim 1, characterized in that: In step five, the criterion for evaluating the adhesive reliability of the standard sample (3) is as follows: If the average peel force is ≥2.0 N / mm, and the interface failure mode is mainly cohesive failure of the material, and the visual inspection and auxiliary inspection in step four do not find visible peeling, curling, or blistering, and the interface gap is ≤0.05 mm, then the interface adhesion reliability of the standard sample is judged to be excellent. If the average peel force is <2.0 N / mm, or the proportion of adhesion failure in the interface failure mode exceeds 50%, or visible peeling, curling, or blistering is found during visual inspection, or the interface gap is >0.05 mm during auxiliary testing, then the interface reliability of the standard sample is deemed insufficient.

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