Control of fiber length irregularity in stretch-breaking process

Controlling the stretch-breaking sliver fiber length irregularity is the precondition of spinning high quality yarns,and the fiber length irregularity of stretch-breaking slivers is mainly caused by stretch-breaking technology parameters apart from fiber itself original parameters.The relationship between main stretch-breaking technology parameters(stretch-breaking settings and ratio) and fiber length irregularity in stretch-breaking sliver was investigated by analyzing the fiber motion in stretch-breaking process.The study demonstrates that the relationship between input fiber length and stretch-breaking settings affects fiber length irregularity distinctly and its influence on the regularity is affected by matching of input fiber length and stretch-breaking settings,i.e.different input length needs different gauge correspondingly for reducing irregularity to minimum.Stretch-breaking ratio has little influence on length irregularity.