• pbt2021-12-29
• pbt(polybutylene terephthalate) gl236(qualified) instrinsic viscosity(dl/g): 1.280±0.0402021-12-29
• pbt(polybutylene terephthalate)gx121(high-class) instrinsic viscosity(dl/g): 0.980±0.0152021-12-29
• pbt(polybutylene terephthalate)gl236(high-class) instrinsic viscosity(dl/g): 1.280±0.0302021-12-29