The plastic tensile testing machine is a device specifically designed to test the mechanical properties of materials. Its core function is to measure key parameters such as stress, strain, tensile strength, and yield strength of materials during the tensile process by applying controllable tensile forces. Regarding its load range, the following is a detailed explanation:

1. Core positioning of load range

Conventional models: Most plastic tensile testing machines have a concentrated load range and are suitable for the conventional testing needs of most plastic materials. This range covers tensile testing from films, fibers to thick walled pipes.

Expansion model: Some high * devices can support higher loads by replacing sensors or modular design, but these devices are usually used for testing composite materials, metallized plastics, or special engineering plastics, which goes beyond the scope of "conventional plastic testing".

2. Design basis for load range of plastic tensile testing machine

Material properties: The tensile strength of plastics is usually much lower than that of metals, so conventional tests do not require excessive loads.

Testing standards: International standards have clear regulations on the sample size and load range for plastic tensile testing, and the testing machine must meet the range requirements of these standards.

Cost and efficiency: The cost of testing machines with excessive loads significantly increases, and the accuracy may decrease when testing small samples. Therefore, designs below 50kN are more economical and practical.

3. Typical application scenarios

Film and sheet: Testing the tensile strength and elongation at break of packaging materials.

Fibers and ropes: Evaluating the tensile properties of synthetic fibers such as nylon and polyester.

Injection molded parts and pipes: testing the mechanical properties of plastic products such as automotive interior parts and pipes.

R&D and quality inspection: Verify the effectiveness of formula improvements during the material development phase, or conduct batch inspections on the production line.

4. Supplementary explanation for plastic tensile testing machine: balance between load and accuracy

Low load testing: For lightweight materials such as thin films, the testing machine needs to have high precision to ensure accurate measurement of small force values.

High load testing: If testing reinforced plastics (such as glass fiber reinforced PP), it may be necessary to choose equipment close to the upper limit, but it should be noted that the sample size must meet the standard.