Polyester fibre is one of the most used commercial fibres across the world. These are strong synthetic fibres made by blending the alcohol and acid and initiating a chain reaction. Strong and big molecules are generated in this reaction with repetitive structure. Yarns are commercially used interlocked fibres of continuous length majorly used for weaving and knitting. The Polyester Filament Yarn is one of the finest and synthetic yarns that are used for various purposes like Embroidery, sewing, knitting, weaving and so forth. Such yarns are also called PFY. Such yarns are created when MEG and PTA are spun directly. The Polyester yarns brought a revolution in the global textile industry.