Crimp Contraction and Bulk Measurement Methods
topic
Textured yarn bulk and crimp characterisation uses crimp contraction measurement by skein length difference before and after boiling water relaxation per DIN 53840, crimps per centimetre count by direct examination under defined tension, and hot air bulk development by hot air oven treatment followed by skein measurement per ASTM D4031, providing the quantitative crimp parameters that characterise texturing process output and predict fabric hand and cover performance.
Role
Provides the measurable quality parameters for textured yarn characterisation that correlate with downstream fabric performance in knitting and weaving, enabling process optimisation and quality control of texturing machine settings through the crimp contraction and bulk parameters whose values are determined by texturing conditions and whose consistency across spindle positions and production lots governs the shade and hand uniformity of fabrics produced from textured yarn.