Crastin 6130 NC010 DuPont Engineering Polymers PBT  is an unreinforced, medium high viscosity polybutylene terephthalate resin for extrusion and injection molding.

聚对苯二甲酸丁二醇酯，又名聚对苯二甲酸四次甲基酯。与PET一起统称为热塑性聚酯。用于电子电气，汽车和机械设备等。