Ply Yarn Tensile and Evenness Quality Testing
topic
Plied and cabled yarn quality characterisation measures breaking tenacity and elongation by single-end tensile testing per ISO 2062, linear density and count per ISO 2060, twist per metre per ISO 2061, and yarn evenness using capacitance-based evenness testers measuring mass variation as CV percent and imperfection counts that characterise the uniformity of plying and the frequency of thick, thin, and nep defects per unit length.
Role
Provides the complete quality characterisation for plied and cabled yarns that determines their suitability for intended end-use applications in sewing, weaving, and technical reinforcement, with sewing thread quality particularly requiring the combination of high tenacity, low elongation variation, and smooth evenness that together ensure reliable sewing machine operation without thread breaks or needle jamming at the high speeds of industrial sewing operations.