DuPont™ Crastin® PBT thermoplastic polyester resins are based on polybutylene terephthalate. By making physical and technical modifications, a very wide range of products is available that are ideally suited to an enormous variety of industrial applications, including electronics, electrical, automotive, mechanical engineering, chemical and apparatus engineering, domestic and medical appliances and sporting goods. In fact, this growing family is currently available in over 30 different grades, approximately half of which are flame retardant.

Among the many features of various Crastin® PBT grades are mechanical and physical properties of stiffness and toughness, heat resistance, friction and wear resistance, excellent surface finishes and good colorability. They have excellent electrical insulation characteristics and high arc-resistant grades are available. Processing is simple, with good flow properties leading to short cycle times using standard injection molding machines. Post-molding operations such as welding, fastening and glueing are also easy, as are printing, painting, hot stamping and laser marking.