ISO 2062 is suitable for use with textile yarns and twine when determining the breaking force and elongation at break for a given rate of displacement. The testing of yarn is an essential part between the raw material and manufacturing of fabrics. This process determines the quality of the raw material and aides in controlling the quality of the end product.
In principle, the test specimen is supported by clamping a test piece in the stationary jaws. A yarn specimen is extended until rupture at a constant rate of displacement and the breaking force and elongation at break are recorded. To record the test it is important to have a high speed intelligent test data logging rate. This is the transfer rate to the PC of 100Hz or more to capture and record all the data.
We use specially designed 2714 Series pneumatic cord and yarn tensile grips that provide a gradual increase in gripping force over a polished and specially contoured surface capstan. This reduces the chances of premature specimen failure. These grips are ideal for clamping textile cords and yarns material fitted to a tensile testing machine. This is usually of single-column or dual-column table-top design.
Bluehill® 2 Software is used to input specimen details, set the desired test control, automatically calculate the desired results and statistics and produce a test report all in accordance with the standard. For these test types we use either a pre-tensioning air control kit that closes one of the grips once a predetermined load has been achieved or the preload feature of Bluehill that eliminates any slack in the specimen when loading the specimen into the clamping grips prior to test.
We suggest reviewing ISO 2062 to fully understand the test fixture and results requirements.