Polybutylene Terephthalate (PBT) is a crystalline, high molecular weight polymer that has an excellent balance of properties and processing characteristics. Because the material crystallizes rapidly, mold cycles are short and molding temperatures can be lower than for many engineering plastics.
This thermoplastic polyester has very good dimensional stability. It also exhibits high heat resistance, chemical resistance and good electricals. In general, PBT materials exhibit higher tensile, flexural and dielectric strengths and faster, more economical molding characteristics than many thermosets.