The mechanical properties of thin film materials are crucial in the fields of packaging, optical display, and new energy. Traditional uniaxial tensile testing can only reflect the force in a single direction and cannot simulate the complex stress state of materials in actual processing. The emergence of the film biaxial tensile testing machine is precisely to accurately capture the mechanical response of materials under synchronous longitudinal (MD) and transverse (TD) forces.
Core working principle: Four axis linkage and precise control
The core of this device lies in its unique mechanical structure. By using four sets of symmetrically distributed stretching units, coupled with high-precision servo motor drive, the equipment can synchronously apply tension to the four directions of the cross shaped specimen. The key is that the perpendicularity of the two axes needs to be accurate to ± 0.1 °, and ensure that the center of the specimen coincides with the center of the testing machine in real time, thereby ensuring the authenticity and validity of the test data.
Key Technology: From Environmental Simulation to Deformation Measurement
Temperature control system: Film stretching is extremely sensitive to temperature. The device is equipped with dual heating devices (base heating and chamber heating), which can accurately control the temperature of the deformation area and simulate the thermal process of materials in actual processes.
Deformation measurement: Traditional contact measurement is prone to interference when facing high elastic thin films. Modern devices often use high-definition non-contact full field strain measurement systems to collect real-time deformation data within the gauge length, accurately capturing the entire process from elastic deformation to fracture.
Fule Instrument: Professional Testing Solution
Among numerous professional equipment, FL4000SZ series and FL-SL series thin film biaxial tensile testing machines from Fule Instrument Technology perform outstandingly. This series of products has the following characteristics:
High precision and wide range: The axial force value accuracy reaches level 0.5, the resolution is up to 1/500000, and different loads ranging from 1KN to 50KN can be selected to meet the full range testing from ultra-thin films to composite films.
Diversified control: Supports displacement control, force control, and programmable control, and can achieve various complex process simulations such as synchronous stretching and sequential stretching.
Environmental scalability: High and low temperature environmental test chambers can be flexibly selected to evaluate the performance of materials such as lithium battery separators at special temperatures.
Standardization and Data: Strictly following international standards such as GB/T, ASTM, ISO, etc., the software system supports automatic collection of stress-strain curves and generation of reports to ensure data compliance and traceability.
Conclusion
From material research and development to quality control, the film biaxial tensile testing machine has become a common core equipment. Choosing professional equipment such as Fule Instrument with high-precision control and data acquisition capabilities is a key step for enterprises to accurately grasp the "anisotropy" performance of materials and enhance product competitiveness
2026-06-08
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