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.
Fiber Length Array
Statistical Distribution
Data profile representing the frequency of different filament lengths within a sample provides a detailed view of the staple distribution. Laboratory technicians generate this profile by sorting a specific weight of raw material into groups of increasing length. The fiber length array identifies the proportion of short fibers that might reduce the strength of the final yarn.
Sorting Procedure
Mechanical sorters use a series of combs to separate the fibers manually or through automated capacitance sensors. The resulting data is plotted as a bar chart or a cumulative curve to show the percentage of the sample that falls within each length category. Spinning mills use this information to adjust the settings of the drafting rollers and the combing machines.
Quality Yield
Mill performance is tied to the consistency of the staple length found in the raw material. If the array shows a wide distribution with many short filaments, the yarn will be more prone to hairiness and unevenness. Purchasing departments use the fiber length array to verify that a shipment of cotton or wool meets the specifications of the contract.
Data Accuracy
Measurement results vary depending on whether the test is conducted by weight or by number of fibers. Weight based arrays tend to emphasize the presence of longer fibers, while numerical arrays provide a clearer picture of the short fiber content. Standardizing the method of calculation is necessary to allow for accurate comparisons between different batches of raw material.