A chemical fiber, chemical fiber classification is class of textile fibers, textile fibers are divided into natural and chemical fibers. Textile fibers are used to textile fibers of the cloth, textile fiber characteristics are: have a certain length, fineness, flexibility, good physical properties such as strength, but also has good chemical stability. Chemical fibers are made of natural or synthetic macromolecular compound as raw materials, through the chemical and physical processing methods of fibers that are made collectively. Have different sources of the macromolecular compound, artificial fibers and synthetic fibers can be divided into two categories. Synthetic crude oil chemical industry and by-product coking industry, such as polyester, nylon, BR/Acrylic, vinylon, polypropylene, such as an-VDC copolymer fibers are synthetic fibers. Polyester fibers are synthetic fibers in China’s fast-growing varieties in 1965 polyester fiber yield only 100 tons, accounting for only about 1.92% China synthetic fiber production, are in nylon, vinylon, and after Steve fiber and held the fourth place position. 1976 rose to 26,900 tonnes polyester fiber, leapt to the top, 34.3%;1990 annual production exceeded 1 million tons of synthetic fiber production, 1.042 million tonnes; jumped to 6.326 million tonnes in 2001, more 7.721 million tons in 2002, creates the highest record in history. At present, the Chinese polyester fiber production has to 10% an annualised rate of growth, production of polyester fiber consumed per cent of the total consumption of pet polyester 90%. Chemical fiber production occupies an important position in Asia in the world, and China is the largest chemical fiber producer in Asia. In recent years China chemical fiber industrial still high speed development, 2002 China chemical fiber yield accounted for world productions proportion of 23.6%, accounted for China textile fiber productions proportion reached 64.8%; 2003 chemical fiber yield up 11.81 million tons, accounted for world productions of 37.4%, accounted for China textile fiber productions of 66.8%; 2004 China of chemical fiber yield up 13.86 million tons, accounted for world productions of 40.1%; 2005 China chemical fiber productions reached 16.292 million tons, accounted for world productions of 37%. Second, the PTA industry chain structure polyester PTA is the main raw material. PTA is the source of crude oil, crude oil after a certain process to produce naphtha (light naphtha), after a certain process from naphtha extracted PX (PX), PX (formula 65%-cent) through oxidation (oxygen 35%-cent) crystallization drying produce purified Terephthalic acid (PTA, powder). PTA+MEG (ethylene glycol, liquids) production of PET (polyester), PET into polyester fibers, polyester films, polyester bottle. Polyester (pet name) of filament and staple fiber, filament approximately 62%, short fiber approximately cent of polyester, filament yarn for textile enterprises use, short fiber and cotton blended. Simply put, PTA is the PX,PX of raw materials is crude oil. PTA products mainly in the lower reaches of polyester filament and short fiber, slices (including fiber slice, a bottle of slice, slice of film).