Application Handbook_Uster_Statistics - Uster Technologies

4.5.2 Hairiness length classification with USTER ® ZWEIGLE HL400Besides the traditional yarn parameters like evenness, imperfections, strength and elongation, thehairiness plays also an important role in the evaluation of a yarn. The hairiness influences theperformance of subsequent processes like weaving, knitting or dyeing as well as the appearance andend use of the final fabric or garment. The factors influencing hairiness can be sub-divided into 3major groups:• Fiber properties• Yarn parameters• Process parametersThe hairiness length classification gives detailed hairiness information for various applications in thespinning process and also its subsequent processes. This information is especially interesting for:• Compact spinning• Machine maintenance• Knitting• WeavingCharacteristics Abbreviation Unit DescriptionS3 value S3 1/100m The S3 value is the sum of all fiber classes 3 mm and longer(cumulative). This value describes the long protruding fibers of ayarn.Table 4-134.5.3 Strength and elongation of yarns with USTER ® TENSORAPID and USTER ® TENSOJETConventional strength and elongation with USTER ® TENSORAPIDIn quality assurance, tensile testing of textile and technical yarns is one of the most important tests.The USTER ® TENSORAPID operates in accordance with the CRE measuring principle. Theabbreviation CRE stands for "Constant Rate of Extension". This means that the active clamp ismoving at constant speed. The measuring principle is suitable for the testing of textile yarns (stapleand filament yarns), technical yarns, woven fabrics and skeins. With the USTER ® TENSORAPID, it ispossible to test up to 40 samples automatically.USTER ® STATISTICS 22 (36)