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PBT (polybutylene terephthalate) is a thermoplastic engineering polymer, commonly used as an insulator for electronics devices and known by a variety of different trade names. It is a semi-crystalline polymer variant of polyester that is mechanically strong, heat-resistant up to 150°C, and resistant to solvents. PBT rod is the most common “raw” form of this material, and is generally available in standard lengths or cut to size per customer requirements. As a material of construction, PBT rod delivers elevated performance over other similar types of plastic. It offers wear and chemical resistance greater than acetal, and, unlike acetal, is approved for use in direct food contact applications. Nylon has fifteen-times greater moisture absorption than PBT’s extremely low 0.07%. PBT rod offers 20% greater impact resistance, a 50% better wear factor, and an approximately 50% lower coefficient of friction than PET-P. PBT also exhibits excellent machining characteristics and outstanding dielectric strength, and maintains its dimensional accuracy and stability over long periods of use. In addition to its use in electronics, PBT is also used in automotive construction, to make load bearing industrial components, household items such as showerheads and clothes irons, toothbrushes, food processing machinery components, and in electronic musical instruments such as keyboards. If intended for use in outdoor applications, PBT requires UV-protective additives. It is also flammable and sensitive to hot water above 60°C.