PET copper plated filmDue to its excellent mechanical properties of PET (polyethylene terephthalate) and excellent conductivity of copper, it has been widely used in many fields such as electronics, flexible displays, and solar cells. The flexibility and bendability requirements of PET copper plated film vary in different application scenarios, and accurate evaluation of these properties is crucial. Advanced Institute (Shenzhen) Technology Co., Ltd. has rich experience in material performance evaluation and related technology research and development, providing strong support for the performance optimization of PET copper plated films.
1、 Evaluation indicators and methods
（1） Bending radius test
The bending radius is a key indicator for measuring the bendability of PET copper plated film. Using cylindrical axis bending test, PET copper plated film is bent around cylindrical axes of different diameters. As the diameter of the cylindrical shaft decreases, the degree of bending of the membrane material increases. When visible cracks or copper coating peeling appear on the surface of the film material, record the diameter of the cylindrical axis at this time, and half of this diameter is the minimum bending radius of the film material. For example, in the application of electronic flexible circuit boards, PET copper plated films are required to withstand smaller bending radii to meet the complex wiring requirements of the circuit board. The high-precision bending testing equipment developed by Advanced Institute (Shenzhen) Technology Co., Ltd. can accurately measure the stress-strain relationship of membrane materials at different bending angles, providing a basis for accurately evaluating the bending radius.
（2） Flexibility cycle test
Flexibility cycle test is used to evaluate
PET copper plated filmPerformance stability under repeated bending conditions. Fix the membrane material on a specific bending device, set a certain bending angle and number of cycles, and simulate the bending situation in actual use. During the cycling process, regularly check whether there are cracks on the surface of the film material, whether the copper coating has peeled off, and measure the resistance changes of the film material. If the resistance changes beyond the allowable range, it indicates that the copper coating inside the film material may break, affecting its conductivity. For PET copper plated films in solar cells, they need to be able to withstand a large amount of cyclic bending to adapt to deformation caused by wind and sun exposure in outdoor environments. Advanced Institute (Shenzhen) Technology Co., Ltd. has improved the efficiency and accuracy of flexibility cycle testing by optimizing the testing process, saving a lot of time for product development.
（3） Tensile testing
The tensile test can indirectly reflect the flexibility of PET copper plated film. On the tensile testing machine, apply axial tension to the membrane material and record the stress-strain curve of the membrane material during the tensile process. The higher the elongation of the membrane material, the better its flexibility. Meanwhile, observe the bonding between the copper coating and the PET substrate during the stretching process. If there is peeling of the coating, it indicates that the flexibility of the film material is insufficient and cannot meet the application requirements. In the electrode application of wearable devices, PET copper plated film needs to have good elongation to adapt to the stretching deformation during human movement. The Material Mechanics Laboratory of Advanced Institute (Shenzhen) Technology Co., Ltd. has advanced tensile testing equipment that can accurately measure the tensile properties of PET copper plated films under different temperature and humidity conditions.
2、 Technical support from Advanced Institute of Technology
Advanced Institute (Shenzhen) Technology Co., LtdSignificant achievements have been made in the research of flexibility and bendability of PET copper plated films. On the one hand, by optimizing the copper plating process, the adhesion between the copper coating and the PET substrate can be improved. For example, advanced plasma pretreatment technology is used to introduce active groups on the surface of PET, enhance the adhesion of copper coating, and prevent the copper coating from falling off during the bending process of the film material, thereby improving flexibility and bendability. On the other hand, the company has developed various specialized software for evaluating the performance of PET copper plated films. These software can quickly analyze and process test data, establish performance prediction models, and help enterprises accurately select suitable PET copper plated film products according to different application scenarios.
Accurately evaluating the flexibility and bendability of PET copper plated film is crucial for its successful application in different scenarios. Advanced Institute (Shenzhen) Technology Co., Ltd. provides comprehensive technical support for the performance evaluation and optimization of PET copper plated films with advanced testing methods, equipment, and research and development achievements, promoting the development of related industries.
The above data is for reference only, and specific performance may vary due to production processes and product specifications.
