Effects of Various Suessen Heat Setting Variables on Thermal Stress Analysis Measurement

Abstract

A thermal stress analysis (TSA) technique had previously been developed to determine the heat history and effective heat set temperature of Suessen heat set nylon 66 carpet yarns. In this investigation, the Kanebo KE-2L thermal stress tester was used with yarns heat set with the standard and energy conservation package (ECP) Suessen units. In each sample set, the greige carpet yarns had been subjected to changes in heat set temperature, flyer speed, and steam pressure. The KE-2L accurately measured the effective heat set temperature and heat history of the yarn samples. Low standard errors of prediction and high multiple coefficients of determination ( R2) between the TSA-determined and Suessen heat set temperatures were obtained for both the standard and ECP Suessen yarns. The major Suessen heat setting variable influencing the TSA results is heat set temperature. For the standard Suessen yarns, flyer speed and steam pressure influences on the TSA results were minor and nonsignificant. For the ECP Suessen yarns, the small changes induced in the yarn from flyer speed and a heat set temperature/steam pressure interaction were significant, though still minor, and were measured by the TSA.