The Effect of Primary Heater Temperature and Dye Energy on Fabric Dye Uniformity

Abstract

It is well known that the dye uptake of a yarn is influenced by its temperature history. At texturing, deviations of the primary heater temperature from the set point can lead to heater-induced, dye-uptake variability. The propensity for this type of nonuniformity to occur is shown to be related to both the dye energy and to the stope of the primary heater response curve. Hoseleg data are developed for determining the texturing temperature which minimizes heater- induced, dye-uptake variability over a range of dye energies, carrier type, and carrier concentrations. By employing a subjective fabrie-rating scale to quantify fabrie uniformity, the predictions of hoseleg data for minimizing heater- induced, dye-uptake variability are shown to be valid in fabrie form. Four fabrie constructions Swiss Piqué, Ponte-di- Roma, Crepe, and 2 × 2 Twin-were investigated and shown to vary widely in their criticality for revealing dye nonuniformity.