ISO 2062

Mechanical Method

Testing equipment pulls the yarn at a fixed speed of five hundred millimeters per minute for most standard applications. This procedure requires the machine to record the maximum force reached before the specimen fails. Data points collected include the force in centinewtons and the percentage of elongation at the moment of break.

Yarn Verification

Mill laboratories use the results to confirm that a production lot meets the requirements for high speed knitting or loom operations. If the breaking force is too low, the yarn might snap under the tension of the needles. Testing also helps identify batches that might cause efficiency losses during the warping stage by providing a defensible record of material performance.

Force Limit

Measurement accuracy depends on the gauge length and the pretension applied to the strand before the test starts. Different settings are required for textured yarns or high stretch filaments to ensure the results stay within the valid range of the standard. Any deviation from the defined gauge length will produce data that cannot be compared to the official requirement.