Quantitative Impact of Short Fiber Content on Combed Cotton Rotor Yarn Tenacity Limits
Combing cotton sliver below 5.5% short fiber content raises rotor yarn tenacity ceilings to 18.5 cN/tex by reducing friction slip inside the rotor groove.
Single Strand Breaking Force
Tensile Load
Maximum force required to rupture a single piece of yarn defines the ultimate strength of the material under tension. Testing machines apply a constant rate of extension to a specimen held between two clamps until failure occurs. This single strand breaking force is typically recorded in centinewtons to provide a precise measure of the yarn resistance.
Specimen Grip
Clamps must secure the yarn without causing damage or slippage that would invalidate the test result. If the specimen breaks at the edge of the grip, the data point is discarded because it does not represent the true strength of the strand. Proper alignment ensures that the force is applied axially along the length of the yarn.
Fabric Production
Quality requirements for high speed looms depend on the yarn being able to withstand the peak tensions of the insertion process. Low values for the single strand breaking force lead to frequent machine stops and defects in the finished cloth. Mill managers use these test results to select the appropriate yarn for specific fabric constructions.
Gauge Length
Results of the measurement are influenced by the distance between the two clamps. Longer test lengths are more likely to contain a weak point, leading to a lower average breaking force. Standardizing the gauge length at five hundred millimeters is a common requirement for ensuring that data is comparable across different laboratories.