Selection Guide for Rubber and Plastic Tensile Testing Machines

In the research and production of polymer materials such as rubber and plastic, tensile performance is one of the core indicators for measuring material quality. The rubber plastic tensile testing machine is a specialized testing equipment tailored for this type of elastic material, widely used for mechanical performance testing of automotive seals, cable sheaths, films, pipes, shoe materials, and other products.

Why do rubber and plastic testing require specialized models?

Rubber and plastic have characteristics such as high elongation, low modulus, and strong resilience, which ordinary tensile testing machines cannot meet their testing needs. The specialized rubber and plastic tensile testing machine has been designed with targeted measures in the following aspects:

Pneumatic fixture: The thickness of the rubber sample decreases sharply during the stretching process, and traditional manual fixtures are prone to slipping or breaking the sample. Pneumatic fixtures can provide constant and controllable clamping force, adaptively clamping with sample deformation, effectively avoiding slippage.

Large stroke design: The fracture elongation of rubber can usually reach 300% to 800%, and some elastomers can even exceed 1000%. The testing machine needs to be equipped with sufficient effective travel (usually above 800mm) to ensure that the specimen does not touch the limit before fracture.

High precision extensometer: Rubber has low tensile modulus and large deformation, making it difficult for ordinary displacement sensors to accurately measure real strain. By using non-contact video extensometers or large deformation extensometers, it is possible to track the changes in gauge length throughout the entire process and obtain accurate stress-strain curves.

Main testing items

Tensile strength: the maximum tensile stress that the specimen can withstand before fracture

Tensile elongation at break: the percentage elongation of the gauge length at break

Tensile stress: the stress value at a specific elongation rate (such as 100, 300%)

Tear strength: Evaluating the material's ability to resist tearing

Meet mainstream testing standards

The rubber and plastic tensile testing machine can conduct tests according to domestic and foreign standards such as GB/T 528 (tensile properties of vulcanized rubber), GB/T 1040 (tensile properties of plastics), ISO 37, ASTM D412, etc., generate test reports with one click, and the data can be traced.

Key points for selection

When choosing a rubber plastic tensile testing machine, it is recommended to focus on whether the sensor range matches the material strength (rubber is generally selected as 500N-5kN), whether the effective stroke meets the maximum elongation, whether the fixture type is suitable for the sample shape (dumbbell shaped, ring shaped, thin film, etc.), and whether the software supports multi-point and multi-stage test data processing.

Conclusion

The rubber plastic tensile testing machine is a professional guarantee for accurate and reliable testing of elastic materials. Choosing the right equipment not only improves detection efficiency, but also provides solid data support for product development and quality control. Welcome to contact us for selection suggestions and detailed technical information