Development of PET solid state polycondensation process
Shen Xijun, Zhang Jun, Lin Jinxia, Feng Lianfang, Jiang Shicheng, Wang Xieqin (Yizheng Chmical Fiber Co. Ltd., Yizheng Jiangsu 211900, China)
The development of PET solid state polymerization(SSP) has been reviewed, and focused on the compare of process, key equipments' structure, and main operation parameters for different process such as Bepex, Buhler, Sinco and Dupont NG3.It is found that the crystallization unit is a important part of the ssp process because PET crystallization coexists with reaction during the polycondensation process, and the difference of crystallization process is the main characteristic of different patent. Enough research of crystallization and crystalline form is the base to improve the technology of ssp process.
【CateGory Index】： TQ316.33