PTA is one of production from petroleum. It is one of the most important organic raw materials, and it’s produced to make polyester fiber (polyester filament and staple fiber), polyester bottle flakes and polyester film. It is used in various industries such as chemical fiber, light industry, electronics, and construction, and is closely related to the people's daily life.

Natural rubber refers to natural rubber latex collected from rubber trees, through coagulation, drying and other processes, it is made elastic solids. About 70% of the world's natural rubber is used in tire manufacturing, 10% is used in rubber tube belts, 10% is used in shoe materials, and 10% is used in other rubber products. Together, natural rubber, steel, petroleum, and coal are the four major industrial raw materials. Thoese are important strategic materials to the national economy and the people's livelihood.

Mono Ethylene Glycol (EG), also known as "glycol", has a molecular formula of C2H6O2. It is a colorless, odorless, and sweet viscous liquid at room temperature, with gravity of about 1.11. Ethylene glycol is an important basic organic raw material for petrochemical industry. It is mainly used to produce polyester fiber (polyester), polyester film, polyester engineering plastics, antifreeze, etc. It has a wide range of uses. Globally , polyester products (including polyester, packaging resins, polyester films and others) account for about 90% of ethylene glycol consumption; in China, more than 90% of ethylene glycol is used to produce polyester and other poly Ester fiber.

Polyester chips are polymerized by purified terephthalic acid (PTA) with 85.5% and ethylene glycol (EG) with 33.5%， mainly refers to polyethylene terephthalate (PET). Polyester chips are divided into: bottle chips, diaphragms, plates, fiber pieces and so on. Polyester chips are mainly used for bottle-grade polyester, polyester film and polyester for chemical fiber.