The Effect of On-line Heat Treatment during High-speed Spinning Process on Physical Properties and Fiber Structure of Polyester Filaments

抄録

An investigation involving 6000m/min spinning process is undertaken on poly (ethylene terephthalate) in this study. Experimental results indicate that the physical properties of the as-spun filaments spun at 6000m/min are close to that of the commercially available yarn, except for the property of break elongation. The break elongation of 6000m/min highly oriented yarn (HOY) is around 50%, i.e., twice that of commercially available yarn. Additionally, yarn with a high break elongation (6000m/min HOY) can generally not be directly used for fabrics in the weaving process.
Furthermore, an on-line heat treatment device is designed in this study for reducing the break elongation of the fibers. Some physical properties, fiber structure, DSC analysis and dynamic modulus of on-line heat treated yarn are also investigated. These results confirm that the break elongation of yarn heat treated at 250°C corresponds with the acceptable level of commercially available yarn, thereby implying that on-line heat treatment exerts a significant effect on reduction of break elongation for a yarn spun at 6000m/min. Consequently, the on-line heated yarn can be directly used in weaving process and the post drawing process can be omitted.