Ultradur? is the trade name of BASF's semi-crystalline thermoplastic saturated polyester series. It is derived from polybutylene terephthalate (PBT) and is used to manufacture high-quality technical components in many industries. Ultradur? is a material that can withstand high stress, with high rigidity and strength, good high-temperature dimensional stability, low water absorption, resistance to many chemicals, extraordinary weather resistance, excellent heat aging resistance, etc. characteristic.