Draw-Texturing Defects and Quality Control
topic
Common DTY defects: tight spots (broken filaments winding around yarn, raised friction), broken filaments (FB count by Zimmer tester, target <5/10⁶ m), undrawn sections (U-defects from POY thick-thin, cause barré in fabric), oiling defects (uneven finish causing friction variation), colour variation (batch-to-batch shrinkage differences causing side-to-side barré). Uster Tester CV% and Uster Classimat identify denier irregularities.
Role
Defect analysis in draw-texturing is essential for fabric quality management. Understanding the root cause connection between POY quality, machine parameters, and fabric appearance defects is a core industrial quality engineering skill.