Partially Oriented Yarn (POY) produced from semi-dull via melting spun using an extruder: Effect of die extruder temperature on elongation of the POY

Semi-Dull is a white and slightly opaque polyester type with 0.35 wt% of titanium dioxide (TiO2) content. Whereas, Partially Oriented Yarn (POY) is a type of yarn produced from polyester fibers derived from continuous filament using molten spinning. The used filament fibers have low strength with a very high percentage of elongation. This study aims to analyze the elongation properties of the yarn produced during molten spinning process of raw materials. The yarn produced has 165 denier 96 filaments Semi-Dull POY (i.e. POY 165/96 SDC). In this study, the used raw material is Semi-Dull, which then melted in the extruder machine and spun into Partially Oriented Yarn (POY). The temperatures of the extruder die was varied (i.e. 275, 280, 285°C) and controlled by using a commercial thermal fluid, i.e. DOWTHERM ™ . The POY samples prepared from the molten spinning process using extruder were then analyzed for their elongation at different extruder die temperatures. The elongation analysis results showed that the elongations of the POY were about 127.17; 137.85; 137.97 % at die temperatures of 275, 280, 285°C, respectively. From the results, it can be concluded that the die temperature has affected the elongation properties of the POY 165/96 SDC yarn.