Effect of major working parameters on mechanical properties of yarns in false-twist texturing

Due to increasing production speeds, friction twisting is the dominant texturing method. As the texturing speed is increased, the heater and cooling lengths have to be increased in order to heat the yarn sufficiently. It is also necessary to shorten the texturing zone to reduce the investment costs and to operate the machines more easily. The Institut fur Textiltechnik in Aachen used a trial machine to establish tenacity values of textured yarns as a function of heater residence time and d/y ratio.