Mathematical Modeling of Non Linear Fiber Loss in Dual Nozzle Air Jet Hybrid Blends
Non-linear fiber loss in dual nozzle spinning causes composition drift that alters yarn mass, pilling resistance, and customs classification thresholds.
Fiber Cohesion Factor
Frictional Clinging
Natural and synthetic fibers rely on surface friction to hold together during the initial stages of yarn manufacturing. The fiber cohesion factor measures this clinging ability, which is essential for holding loose fibers in a continuous strand before twist is introduced. This force arises from natural surface scales or synthetic finishes applied to the fiber during processing.
Insufficient surface friction causes the sliver to fall apart on the production floor.
Drawing Performance
Drafting operations stretch the fiber bundle to parallelize individual strands and reduce linear density. A high fiber cohesion factor prevents premature slipping during drawing, which ensures a highly uniform sliver weight. If the clinging force is too low, the sliver drafted in the machine suffers from drafting waves and thin spots.
These defects ultimately compromise the strength of the spun yarn.
Moisture Influence
Relative humidity in the spinning mill affects the mechanical behavior of fiber bundles. High moisture levels increase fiber cling, which alters processing tensions.
Technical Evaluation
Laboratory instruments evaluate fiber resistance to drafting forces to determine processing suitability. Technicians pull a carded sliver apart under controlled tension and record the peak resistance force. This test helps spin mills adjust their lubricant and antistatic spray applications to maintain optimal performance.
Consistent measurements prevent yarn defects during production.