Yarn Evenness and Hairiness Measurement Systems
topic
Automated yarn quality measurement systems including Uster Tester and Zweigle instruments measure yarn mass variation by capacitance sensing at speeds of 200 to 800 metres per minute, providing CV percent evenness, imperfection count of thin places, thick places, and neps, hairiness index, and Uster Statistics percentile ranking against industry benchmarks, with 100 percent package-level monitoring systems testing every spindle position continuously in ring spinning frames.
Role
Provides objective, standardised yarn quality characterisation that predicts fabric quality and downstream processing performance through the correlation between yarn evenness parameters and fabric appearance, dye uptake uniformity, and knitting machine efficiency, with Uster Statistics providing the international benchmark system that enables yarn quality comparison across producers and markets and defines the quality targets for spinning process optimisation.