These synthetic fibers are produced from the polymerization of the viscosity of dimethyl terephthalate or Terephthalic acid and Ethylene glycol in the procedure which is named melt spinning. Polyester fibers are found in the market with other commercial names such as Dacron and Terylene. These fibers are used in making carpets, floor coverings, and sleeping products like pillows, quilts, mattresses, and dulls.Also Polyester fibers are mainly used in garments, clothes, different types of textiles.Their resistance against constant, heavy movements and their water resistance make them count as a perfect fiber to use as an ideal fiber in wet and humid environments.