• pbt(polybutylene terephthalate)gl221(high-class) instrinsic viscosity(dl/g): 0.980±0.0152021-12-29
• pbt(polybutylene terephthalate)gx121(qualified) instrinsic viscosity(dl/g): 0.980±0.0202021-12-29
• 1-methyl-2-pyrrolidinone2021-12-29
• tetrahydrofuran2021-12-29