Heat Setting How It Changes with Construction and Elastane Content
Heat Setting does not stay constant when construction changes. Understanding the direction of change helps during development.
Effect of knit structure
Loop length and density move results first, usually before any yarn change is made. Working figures for Heat Setting normally sit around typically 180-195 degrees in mainstream production. Note stenter setting parameters on the tech pack so nobody tests against an older revision.
Effect of elastane content
More elastane raises recovery but changes the value measured by stenter setting parameters, so retest after any blending change. Record elastane content alongside Heat Setting, because blends shift the measured value. A result outside typically 180-195 degrees usually points to process drift rather than to the fibre itself.
Effect of finishing
Heat setting and softeners shift results, which explains differences between a hand sample and bulk. Keeping reference values for Heat Setting lets suppliers quote without extra sampling rounds. Ask for conditioning details together with stenter setting parameters, since both affect the reading.
Typical range
Working values stay around typically 180-195 degrees for mainstream activewear. Working figures for Heat Setting normally sit around typically 180-195 degrees in mainstream production. Note stenter setting parameters on the tech pack so nobody tests against an older revision.
Development advice
Change one variable at a time, then verify against stenter setting parameters before moving to the next sample round. Record elastane content alongside Heat Setting, because blends shift the measured value. A result outside typically 180-195 degrees usually points to process drift rather than to the fibre itself.
