Influence of heater temperature and texturing speed on the physical-mechanical properties of polyamide textured yarns in false-twist texturing process

Abstract

In this paper, the effect of technical and technological parameters in false twist texturing on physical-mechanical properties of polyamide yarns was studied. Partially oriented (POY) multifilament with fineness of 22f07x1 dtex was textured under factory conditions on a friction texturing ICBT model FT 15 E3 machine. Using low temperature long heaters the influence of heater temperature and texturing speed on crimping, shrinking and breaking characteristics of yarn was investigated. Thereby, the values for the ratio of surface speed of disks to linear yarn speed, (D/Y), of 1.9, and tension in texturing zone (stretching) of 1.305 and in winding zone of 0.954, were kept constant. The investigated texturing parameters affect the change of these characteristics to varying degrees. For heater temperatures of 200, 210 and 220 degrees C, linear negative correlation was found between the texturing speed, indicator of crimping and texturing speed and breaking characteristics, while the positive correlation was established between the speed of texturing and shrinkage. It was determined the correlation factor between the texturing process parameters and the analysed properties of the yarn. Based on the obtained results it can be concluded that with the established correlation between the speed of texturing and the investigated properties of the yarn, the correlation factor increases with the increase in heater temperature to 210 degrees C. However, at the temperature of 220 degrees C, generally in most cases this value decreases. Therefore, in this study, the optimum temperature of the heater is 210 degrees C, taking into account the selection of other parameter values of the D/Y ratio and stretching.