PET (polyethylene glycol terephthalate) is produced from PTA and EG through continuous esterification and polycondensation, The polymer technology and advanced equipments are originally introduced from German Zimmer polymer line by Kanghui Petrochemical with a capacity of 500t/d for an individual plant.The process carries on in five stages and can be real time controlled by using an online viscometer to ensure a minimum viscosity fluctuation. All the products with the features of perfect uniformity, strong stability and excellent machining performance can reach the international advanced level.