Polyethylene terephthalate (trade names: Arnite, Impet and Rynite, Ertalyte,Hostaphan, Melinex and Mylar films, and fibres Dacron, Diolen, Tergal, Terital, Terylene and Trevira) is part of the polyester family and is a thermoplastic resin made of phthalate, suitable for food contact. It may exist in an amorphous form (transparent) or semicrystalline (white and opaque) depending on the manufacturing process and on the thermic story. It is also used for its electric characteristics, chemical resistance, high temperatures performances, flammability, printwork speed.