It is mainly used in the synthesis of polyester fiber, resin, film, polyester paint and engineering plastics, etc. Dimethyl terephthalate is mainly used in the manufacture of polyester resin, and then the manufacture of film and fiber, as well as high strength polyester insulation paint. Polyester film is mainly used as electrical insulation material and film production (such as Chemicalbook as film, X-ray film, photographic film and sound tape, video tape, computer tape, etc.). The most common use of polyester resins is in the manufacture of fibers, used in fabrics, fishing nets, carpets, tyre cord and so on. It can also be used to produce plasticizer dioctyl terephthalate.