A method for testing the edge durability of a sheet material
The method for testing the durability of edge banding of sheet materials, including steps such as cutting, surface treatment, thermomechanical analysis, and temperature and humidity cycling tests, solves the problem of difficulty in assessing the long-term durability of edge banding of sheet materials in existing technologies, and realizes scientific durability assessment and optimization design support.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SICHUAN YISHENG CONSTR GRP
- Filing Date
- 2026-02-25
- Publication Date
- 2026-05-29
AI Technical Summary
Existing technologies are insufficient to comprehensively and accurately assess the long-term durability of edge banding under complex working conditions, and cannot provide scientific and comprehensive technical support for edge banding process optimization, material selection, and structural design.
A method for testing the edge banding durability of sheet materials is adopted, which includes steps such as cutting standard-sized specimens, surface treatment, humidity balancing, thermomechanical analysis, temperature and humidity cycling test, constant load test and warpage measurement. The edge banding durability is evaluated by calculating the difference in expansion coefficient, deformation, shear strength and warpage change, combined with a weighted scoring method.
It enables a comprehensive and accurate durability assessment of edge banding under complex working conditions, providing scientific and comprehensive technical support for edge banding process optimization, material selection and structural design.
Smart Images
Figure CN122109437A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of sheet material performance testing technology, and in particular to a method for testing the edge banding durability of sheet materials. Background Technology
[0002] In furniture manufacturing, building decoration, and interior decoration, edge banding is a key process for ensuring the performance and lifespan of wood panels. Its core functions are to seal the edges of the panels, prevent the substrate from warping due to moisture, improve the aesthetics of the panels, and enhance structural stability. Currently, industry testing methods for edge banding mainly focus on short-term performance, covering routine testing items such as edge banding adhesion strength, appearance integrity, and basic dimensional accuracy, in order to quickly determine the basic qualification of the edge banding process.
[0003] Current testing methods for edge banding of boards are insufficient to comprehensively and accurately assess the long-term durability of edge banding under complex working conditions, and cannot provide scientific and comprehensive technical support for edge banding process optimization, material selection, and structural design. Summary of the Invention
[0004] The purpose of this invention is to provide a method for testing the edge banding durability of boards, aiming to solve the technical problem that existing tests on board edge banding are difficult to comprehensively and accurately assess the long-term durability of board edge banding under complex working conditions, and cannot provide scientific and comprehensive technical support for edge banding process optimization, material selection and structural design.
[0005] To achieve the above objectives, the present invention provides a method for testing the edge banding durability of sheet metal, comprising the following steps: Cut the plate sample into standard-sized specimens, perform surface treatment on the specimens, and let them stand in a standard environment for 48 hours to achieve humidity equilibrium. The linear expansion coefficients of the sealing material and the substrate of the specimen were tested using a thermomechanical analyzer. The expansion coefficient variation curves of the two were recorded within the temperature range of -20℃ to 80℃, and the difference in expansion coefficients under different temperature ranges was calculated. The treated specimens were placed in an environmental test chamber for 30 cycles of temperature and humidity cycling tests, and the data were recorded. Under a set environment, a constant load is applied to the specimen and the test is continued for 30 to 90 days. The deformation and shear strength of the sealing interface are measured periodically, and the aging phenomenon is recorded. The specimen was fixed on the load testing device, and a constant load was applied along the plane of the board perpendicular to the edge sealing interface. The load value was 30% to 50% of the rated load capacity of the board, and the test environment was controlled at a temperature of 25±3℃ and a relative humidity of 60±10%. After the long-term load test is completed, the overall warpage of the specimen is measured using a flatness tester and compared with the warpage data before the test. By calculating the change in warpage, the actual effect of the balanced lamination process of the board after edge sealing on preventing warpage is evaluated. The weighted scoring method was used to calculate the overall score for edge banding durability.
[0006] Among the steps, the following steps are involved: cutting the plate sample into standard-sized specimens, surface-treating the specimens, and allowing them to stand in a standard environment for 48 hours to achieve humidity equilibrium: Select board samples using the target edge banding process, which includes a structure that matches the expansion coefficient of the edge banding and the substrate, a prestressed edge banding application process, and a balanced lamination process after edge banding. Cut the board sample into standard-sized specimens, ensuring that the edge banding length is consistent with the specimen length; Clean the surface of the specimen to remove impurities, burrs and excess adhesive. The treated specimens were placed in an environment with a temperature of 23±2℃ and a relative humidity of 50±5% and left to stand for more than 48 hours until the internal humidity of the specimens reached equilibrium.
[0007] Among the steps, the linear expansion coefficients of the sealing material and the substrate of the specimen are tested separately using a thermomechanical analyzer, and the expansion coefficient variation curves of the two are recorded within the temperature range of -20℃ to 80℃, and the difference in expansion coefficients under different temperature ranges are calculated as follows: Debug the thermomechanical analyzer and set the test temperature range to -20℃ to 80℃; Select edge sealing material samples and substrate samples from the specimen and fix the samples on the test fixture of the thermomechanical analyzer; Start the equipment to test the coefficient of linear expansion and record the expansion coefficient data of the sealing material and the substrate at different temperature nodes in real time; Based on the test data, the expansion coefficient variation curves of the sealing material and the substrate were plotted respectively, and the difference in expansion coefficient between the two was calculated one by one according to different temperature ranges.
[0008] Among the steps, the treated specimens were placed in an environmental test chamber for 30 cycles of temperature and humidity cycling tests, and the data was recorded. Place the pretreated specimens evenly inside the test chamber; The temperature and humidity cycle is set to 24 hours, and each cycle includes a medium-low temperature and low humidity stage, a heating and humidification stage, a high temperature and high humidity stage, and a cooling and dehumidification stage. Start the environmental test chamber and conduct 30 cycles of cyclic testing according to the set program, strictly controlling the rate of change of temperature and humidity and the duration of maintenance in each cycle. After each cycle, a laser rangefinder is used to measure the warping height at the sealing interface, a feeler gauge is used to measure the width of the interface gap, and the measurement data for each cycle is recorded.
[0009] Among the steps, applying a constant load to the specimen under a set environment and continuously testing for 30 to 90 days, periodically measuring the deformation and shear strength of the sealing interface, and recording the aging phenomena are as follows: The specimen is fixed on the load testing device, and a set constant load is applied along the plane of the board perpendicular to the edge sealing interface, wherein the load value is 30% to 50% of the rated load capacity of the board; Adjust the test environment to maintain the temperature at 25±3℃ and the relative humidity at 60±10%, and maintain these environmental conditions until the test is completed. Start timing and continue testing for 30 to 90 days, collecting data every 3 days during this period. Use a laser rangefinder to measure the deformation of the sealing interface and use a universal testing machine to test the shear strength of the interface at a loading speed of 1 mm / min to 5 mm / min. Observe and record whether the sealing tape shows cracking, discoloration, or adhesion failure.
[0010] Among them, in the steps of fixing the specimen on the load testing device, applying a constant load along the plane of the board perpendicular to the edge sealing interface, the load value being 30%~50% of the rated load-bearing capacity of the board, and controlling the test environment to be a temperature of 25±3℃ and a relative humidity of 60±10% as follows: Place the pre-treated specimen stably in the designated position of the load testing device, and adjust the clamps to fix the specimen firmly. Based on the rated load-bearing capacity of the board, calculate and set a constant load value, and start the device to apply the load to the specimen, wherein the load direction is perpendicular to the edge sealing interface along the plane of the board. Turn on the test environment control equipment to control the temperature of the test area at 25±3℃ and the relative humidity at 60±10%, and monitor the environmental parameters in real time.
[0011] One of the steps involved measuring the overall warpage of the specimen using a flatness tester after the long-term load test, comparing it with the warpage data before the test, and calculating the change in warpage to evaluate the actual effect of the edge-sealing board balance lamination process on preventing warpage. Debug the flatness tester and clarify the initial warpage data of the specimen recorded before the test; Remove the test piece after the long-term load test and place it on a flat test platform; The specimen was fully inspected using a flatness tester. Multiple test points were selected in different areas of the specimen, and the warping data of each point was measured and recorded. The overall warping of the specimen was then calculated. The overall warpage after testing is compared with the initial warpage data before testing, and the change in warpage between the two is calculated.
[0012] This invention discloses a method for testing the edge banding durability of a board material, comprising the following steps: cutting the board sample into standard-sized specimens, surface-treating the specimens, and allowing them to stand in a standard environment for 48 hours to achieve humidity equilibrium; using a thermomechanical analyzer to test the linear expansion coefficients of the edge banding material and the substrate, recording the expansion coefficient variation curves of the two within a temperature range of -20℃ to 80℃, and calculating the difference in expansion coefficients at different temperature ranges; placing the treated specimens in an environmental test chamber for 30 cycles of temperature and humidity cycling tests, and recording the data; applying a constant load to the specimens under a set environment and continuously testing for 30 to 90 days, periodically measuring the deformation and shear strength of the edge banding interface, and recording the aging phenomena; fixing the specimens under the load... On the testing device, a constant load is applied perpendicular to the edge banding interface along the plane of the board. The load value is 30% to 50% of the rated load-bearing capacity of the board, and the test environment is controlled at a temperature of 25±3℃ and a relative humidity of 60±10%. After the long-term load test, the overall warpage of the specimen is measured using a flatness tester and compared with the warpage data before the test. By calculating the change in warpage, the actual effect of the balanced lamination process on preventing warpage after edge banding is evaluated. A weighted scoring method is used to calculate the comprehensive score of edge banding durability. Through the above methods, the long-term durability of board edge banding under complex working conditions can be comprehensively and accurately evaluated, providing scientific and comprehensive technical support for edge banding process optimization, material selection, and structural design. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0014] Figure 1 This is a flowchart of the steps in the edge-sealing durability test method for the sheet metal of the present invention.
[0015] Figure 2 This is a flowchart of steps S100 of the present invention.
[0016] Figure 3 This is a flowchart of steps S200 of the present invention.
[0017] Figure 4 This is a flowchart of steps S300 of the present invention.
[0018] Figure 5 This is a flowchart of steps S400 of the present invention.
[0019] Figure 6 This is a flowchart of steps S500 of the present invention.
[0020] Figure 7 This is a flowchart of steps S600 of the present invention. Detailed Implementation
[0021] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.
[0022] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.
[0023] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."
[0024] Please see Figures 1-7 This invention provides a method for testing the edge banding durability of a board material, comprising the following steps: S100: Cut the plate sample into standard-sized specimens, perform surface treatment on the specimens, and let them stand in a standard environment for 48 hours to achieve humidity balance.
[0025] In this embodiment, the plate sample is cut into standard-sized specimens, the specimens are surface-treated, and then left to stand in a standard environment for 48 hours to reach humidity equilibrium. The specific process is as follows: S101: Select a board sample using the target edge banding process, which includes a structure that matches the expansion coefficient of the edge banding and the substrate, a prestressed edge banding application process, and a balanced lamination process after edge banding. S102: Cut the board sample into standard-sized specimens, ensuring that the edge banding length is consistent with the specimen length; S103: Clean the surface of the specimen to remove impurities, burrs and excess adhesive from the surface of the specimen; S104: Place the treated specimen in an environment with a temperature of 23±2℃ and a relative humidity of 50±5% and leave it to stand for more than 48 hours until the internal humidity of the specimen reaches equilibrium.
[0026] In the above process, firstly, a board sample using the target edge banding process is selected. The target edge banding process includes a structure that matches the expansion coefficient of the edge banding and the substrate, a prestressed edge banding application process, and a post-edge banding balanced lamination process. Then, the board sample is cut into standard-sized specimens to ensure that the edge banding length is consistent with the specimen length. The surface of the specimen is then cleaned to remove impurities, burrs, and excess adhesive. Next, the treated specimen is placed in an environment with a temperature of 23±2℃ and a relative humidity of 50±5% and left to stand for more than 48 hours until the internal humidity of the specimen reaches equilibrium.
[0027] S200: The linear expansion coefficients of the sealing material and the substrate of the specimen are tested using a thermomechanical analyzer. The expansion coefficient variation curves of the two are recorded within the temperature range of -20℃ to 80℃, and the difference in expansion coefficients under different temperature ranges is calculated.
[0028] In this embodiment, a thermomechanical analyzer is used to test the linear expansion coefficients of the sealing material and the substrate of the specimen, respectively. The expansion coefficient variation curves of the two are recorded within the temperature range of -20℃ to 80℃, and the difference in expansion coefficients under different temperature ranges is calculated. The specific process is as follows: S201: Debug the thermomechanical analyzer and set the test temperature range to -20℃~80℃; S202: Select the edge sealing material sample and the substrate sample from the specimen, and fix the sample on the test fixture of the thermomechanical analyzer; S203: Start the equipment to test the coefficient of linear expansion and record the expansion coefficient data of the sealing material and the substrate at different temperature nodes in real time; S204: Based on the test data, plot the expansion coefficient variation curves of the sealing material and the substrate respectively, and calculate the difference in expansion coefficient between the two in different temperature ranges.
[0029] In the above process, the thermomechanical analyzer is first debugged and the test temperature range is set to -20℃ to 80℃. Then, the edge sealing material sample and the substrate sample on the specimen are selected and fixed on the test fixture of the thermomechanical analyzer. The equipment is then started to perform linear expansion coefficient test and the expansion coefficient data of the edge sealing material and the substrate are recorded in real time at different temperature nodes. Then, based on the test record data, the expansion coefficient change curves of the edge sealing material and the substrate are plotted respectively, and the difference in expansion coefficient between the two is calculated one by one according to different temperature ranges.
[0030] S300: Place the treated specimen in an environmental test chamber for 30 cycles of temperature and humidity cycling tests and record the data.
[0031] In this embodiment, the treated specimens were placed in an environmental test chamber for 30 cycles of temperature and humidity cycling tests, and the data were recorded. The specific process is as follows: S301: Place the pretreated specimens evenly inside the test chamber; S302: Set the temperature and humidity cycle to 24 hours. Each cycle includes a medium-low temperature and low humidity stage, a heating and humidification stage, a high temperature and high humidity stage, and a cooling and dehumidification stage. S303: Start the environmental test chamber and perform 30 cycles of cyclic testing according to the set program, strictly controlling the rate of change of temperature and humidity and the duration of maintenance in each cycle stage; S304: After each cycle, use a laser rangefinder to measure the warping height at the sealing interface, use a feeler gauge to measure the width of the interface gap, and record the measurement data for each time.
[0032] In the above process, the pretreated specimens are first placed evenly in the test chamber; then the temperature and humidity cycle is set to 24 hours, and each cycle includes a medium-low temperature and low humidity stage, a heating and humidification stage, a high temperature and high humidity stage, and a cooling and dehumidification stage; then the environmental test chamber is started, and 30 cycles of cyclic testing are carried out according to the set program, and the rate of change and maintenance time of temperature and humidity are strictly controlled in each cycle stage; after each cycle, the warping height at the sealing interface is measured with a laser rangefinder, the width of the interface gap is measured with a feeler gauge, and the measurement data are recorded each time.
[0033] S400: Apply a constant load to the specimen under the set environment and test continuously for 30 to 90 days. Periodically measure the deformation and shear strength of the sealing interface and record the aging phenomenon.
[0034] In this embodiment, a constant load is applied to the specimen under a set environment and the test is conducted continuously for 30 to 90 days. The deformation and shear strength of the sealing interface are measured periodically, and the aging phenomenon is recorded. The specific process is as follows: S401: Fix the specimen on the load testing device and apply a set constant load along the plane of the plate perpendicular to the edge sealing interface, wherein the load value is 30% to 50% of the rated load-bearing capacity of the plate; S402: Adjust the test environment, keeping the temperature at 25±3℃ and the relative humidity at 60±10%, and maintain these environmental conditions until the test is completed; S403: Start timing and continue testing for 30 to 90 days, with data collection every 3 days during this period. Use a laser rangefinder to measure the deformation of the sealing interface and use a universal testing machine to test the shear strength of the interface at a loading speed of 1 mm / min to 5 mm / min. Observe and record whether the sealing tape shows cracking, discoloration, or adhesion failure.
[0035] In the above process, the specimen is first fixed on the load testing device, and a set constant load is applied along the plane of the board perpendicular to the edge sealing interface. The load value is 30% to 50% of the rated load-bearing capacity of the board. The test environment is then adjusted, with the temperature maintained at 25±3℃ and the relative humidity maintained at 60±10%, and this environmental condition is maintained until the end of the test. The timing is started, and the test is carried out for 30 to 90 days. Data is collected every 3 days during this period. The deformation of the edge sealing interface is measured using a laser rangefinder, and the shear strength of the interface is tested using a universal testing machine at a loading speed of 1 mm / min to 5 mm / min. The cracking, discoloration, and adhesion failure of the edge sealing strip are observed and recorded.
[0036] S500: Fix the specimen on the load testing device and apply a constant load along the plane of the board perpendicular to the edge sealing interface. The load value is 30% to 50% of the rated load capacity of the board. Control the test environment to a temperature of 25±3℃ and a relative humidity of 60±10%.
[0037] In this embodiment, the specimen is fixed on the load testing device, and a constant load is applied along the plane of the board perpendicular to the edge sealing interface. The load value is 30% to 50% of the rated load-bearing capacity of the board, and the test environment is controlled at a temperature of 25±3℃ and a relative humidity of 60±10%. The specific process is as follows: S501: Place the pre-treated specimen stably in the designated position of the load testing device, and adjust the clamps to fix the specimen firmly. S502: Calculate and set a constant load value based on the rated load capacity of the plate, and start the device to apply the load to the specimen, wherein the load direction is perpendicular to the edge sealing interface along the plane of the plate. S503: Turn on the test environment control equipment to control the temperature of the test area at 25±3℃ and the relative humidity at 60±10%, and monitor the environmental parameters in real time.
[0038] In the above process, the pre-treated specimen is first placed stably in the designated position of the load testing device, and the clamp is adjusted to fix the specimen firmly. Then, according to the rated load capacity of the board, a constant load value is calculated and set, and the device is started to apply the load to the specimen, wherein the load direction is perpendicular to the edge sealing interface along the plane of the board. The test environment control equipment is turned on to control the temperature of the test area at 25±3℃ and the relative humidity at 60±10%, and the environmental parameters are monitored in real time.
[0039] S600: After the long-term load test is completed, the overall warpage of the specimen is measured using a flatness tester and compared with the warpage data before the test. By calculating the change in warpage, the actual effect of the balanced lamination process of the board after edge sealing on preventing warpage is evaluated.
[0040] In this embodiment, after the long-term load test is completed, a flatness tester is used to measure the overall warpage of the specimen, and the warpage data is compared with that before the test. By calculating the change in warpage, the actual effect of the edge-sealing board balance lamination process on preventing warpage is evaluated. The specific process is as follows: S601: Debug the flatness tester and clarify the initial warpage data of the specimen recorded before the test; S602: Remove the test piece after the long-term load test and place it on a flat test platform; S603: Use a flatness tester to conduct a comprehensive inspection of the specimen, select multiple test points in different areas of the specimen, measure and record the warping data at each point, and calculate the overall warping of the specimen. S604: Compare the overall warpage after the test with the initial warpage data before the test, and calculate the change in warpage between the two.
[0041] In the above process, firstly, the flatness tester is calibrated to clarify the initial warpage data of the specimen recorded before the test; then, the specimen after long-term load testing is taken out and placed on a flat test platform; then, the flatness tester is used to conduct a comprehensive inspection of the specimen, selecting multiple test points in different areas of the specimen, measuring and recording the warpage data at each point, and calculating the overall warpage of the specimen; then, the overall warpage after the test is compared with the initial warpage data before the test, and the change in warpage between the two is calculated.
[0042] S700: The weighted scoring method is used to calculate the comprehensive score of edge banding durability.
[0043] In this embodiment, the weighted scoring method is adopted to calculate the comprehensive score of edge banding durability. The weight ratios of each scoring index are set as follows: the matching degree of expansion coefficients is 15%, the temperature and humidity cycle deformation rate is 20%, the prestress retention rate is 15%, the shear strength retention rate under long-term load is 25%, the change in warpage is 15%, and the aging degree of the edge banding is 10%. Among them, the matching degree of expansion coefficients is scored according to the difference between the two expansion coefficients. The smaller the difference, the higher the score. The temperature and humidity cycle deformation rate and the change in warpage are scored according to the ratio of the actual deformation amplitude to the allowable deformation amplitude. The prestress retention rate and the shear strength retention rate under long-term load are scored according to the ratio of the performance parameters after testing to the initial parameters. The aging degree of the edge banding is deducted according to the severity of the aging phenomenon. When the comprehensive score ≥ 80 points, it is determined that the durability of the edge banding of the board is qualified; when it is lower than 80 points, it is determined as unqualified, and the improvement direction is clarified according to the scores of each index.
[0044] After considering the specification and the content disclosed herein, those skilled in the art will readily conceive of other embodiments of the present application. The present application aims to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include the common knowledge or conventional technical means in the technical field not disclosed in the present application.
[0045] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope.
Claims
1. A method for testing the edge banding durability of a board material, characterized in that, Includes the following steps: Cut the plate sample into standard-sized specimens, perform surface treatment on the specimens, and let them stand in a standard environment for 48 hours to achieve humidity equilibrium. The linear expansion coefficients of the sealing material and the substrate of the specimen were tested using a thermomechanical analyzer. The expansion coefficient variation curves of the two were recorded within the temperature range of -20℃ to 80℃, and the difference in expansion coefficients under different temperature ranges was calculated. The treated specimens were placed in an environmental test chamber for 30 cycles of temperature and humidity cycling tests, and the data were recorded. Under a set environment, a constant load was applied to the specimen and the test was conducted continuously for 30 to 90 days. The deformation and shear strength of the sealing interface were measured periodically, and the aging phenomenon was recorded. The specimen was fixed on the load testing device, and a constant load was applied along the plane of the board perpendicular to the edge sealing interface. The load value was 30% to 50% of the rated load capacity of the board, and the test environment was controlled at a temperature of 25±3℃ and a relative humidity of 60±10%. After the long-term load test is completed, the overall warpage of the specimen is measured using a flatness tester and compared with the warpage data before the test. By calculating the change in warpage, the actual effect of the balanced lamination process of the board after edge sealing on preventing warpage is evaluated. The weighted scoring method was used to calculate the overall score for edge banding durability.
2. The method for testing the edge banding durability of a board as described in claim 1, characterized in that, In the steps of cutting the plate sample into standard-sized specimens, surface-treating the specimens, and allowing them to stand in a standard environment for 48 hours to achieve humidity equilibrium: Select board samples using the target edge banding process, which includes a structure that matches the expansion coefficient of the edge banding and the substrate, a prestressed edge banding application process, and a balanced lamination process after edge banding. Cut the board sample into standard-sized specimens, ensuring that the edge banding length is consistent with the specimen length; Clean the surface of the specimen to remove impurities, burrs and excess adhesive. The treated specimens were placed in an environment with a temperature of 23±2℃ and a relative humidity of 50±5% and left to stand for more than 48 hours until the internal humidity of the specimens reached equilibrium.
3. The method for testing the edge banding durability of the board material as described in claim 1, characterized in that, In the steps of using a thermomechanical analyzer to test the linear expansion coefficients of the sealing material and the substrate of the specimens, recording the expansion coefficient variation curves of the two within the temperature range of -20℃ to 80℃, and calculating the difference in expansion coefficients at different temperature ranges: Debug the thermomechanical analyzer and set the test temperature range to -20℃ to 80℃; Select edge sealing material samples and substrate samples from the specimen and fix the samples on the test fixture of the thermomechanical analyzer; Start the equipment to test the coefficient of linear expansion and record the expansion coefficient data of the sealing material and the substrate at different temperature nodes in real time; Based on the test data, the expansion coefficient variation curves of the sealing material and the substrate were plotted respectively, and the difference in expansion coefficient between the two was calculated one by one according to different temperature ranges.
4. The method for testing the edge banding durability of the board as described in claim 1, characterized in that, In the step of placing the treated specimens in an environmental test chamber for 30 cycles of temperature and humidity cycling and recording the data: Place the pretreated specimens evenly inside the test chamber; The temperature and humidity cycle is set to 24 hours, and each cycle includes a medium-low temperature and low humidity stage, a heating and humidification stage, a high temperature and high humidity stage, and a cooling and dehumidification stage. Start the environmental test chamber and conduct 30 cycles of cyclic testing according to the set program, strictly controlling the rate of change of temperature and humidity and the duration of maintenance in each cycle. After each cycle, a laser rangefinder is used to measure the warping height at the sealing interface, a feeler gauge is used to measure the width of the interface gap, and the measurement data for each cycle is recorded.
5. The method for testing the edge banding durability of the board as described in claim 1, characterized in that, The procedure involves applying a constant load to the specimen under a set environment and continuously testing for 30 to 90 days, periodically measuring the deformation and shear strength of the sealing interface, and recording the aging phenomena. The specimen is fixed on the load testing device, and a set constant load is applied along the plane of the board perpendicular to the edge sealing interface, wherein the load value is 30% to 50% of the rated load capacity of the board; Adjust the test environment to maintain the temperature at 25±3℃ and the relative humidity at 60±10%, and maintain these environmental conditions until the test is completed. Start timing and continue testing for 30 to 90 days, collecting data every 3 days during this period. Use a laser rangefinder to measure the deformation of the sealing interface and use a universal testing machine to test the shear strength of the interface at a loading speed of 1 mm / min to 5 mm / min. Observe and record whether the sealing tape shows cracking, discoloration, or adhesion failure.
6. The method for testing the edge banding durability of the board as described in claim 1, characterized in that, In the steps of fixing the specimen on the load testing device, applying a constant load perpendicular to the edge sealing interface along the plane of the board, with the load value being 30%~50% of the rated load-bearing capacity of the board, and controlling the test environment to a temperature of 25±3℃ and a relative humidity of 60±10% as follows: Place the pre-treated specimen stably in the designated position of the load testing device, and adjust the clamps to fix the specimen firmly. Based on the rated load-bearing capacity of the board, calculate and set a constant load value, and start the device to apply the load to the specimen, wherein the load direction is perpendicular to the edge sealing interface along the plane of the board. Turn on the test environment control equipment to control the temperature of the test area at 25±3℃ and the relative humidity at 60±10%, and monitor the environmental parameters in real time.
7. The method for testing the edge banding durability of a board as described in claim 1, characterized in that, After the long-term load test is completed, a flatness tester is used to measure the overall warpage of the specimen. The warpage data is compared with the data before the test. By calculating the change in warpage, the actual effect of the edge-sealing board balance lamination process on preventing warpage is evaluated. Debug the flatness tester and clarify the initial warpage data of the specimen recorded before the test; Remove the test piece after the long-term load test and place it on a flat test platform; The specimen was fully inspected using a flatness tester. Multiple test points were selected in different areas of the specimen, and the warping data of each point was measured and recorded. The overall warping of the specimen was then calculated. The overall warpage after testing is compared with the initial warpage data before testing, and the change in warpage between the two is calculated.