New super-fast PBT resins curtail cycle time, trim costs

20-Oct-08

DuPont has unveiled new super-fast (SF) grades of its Crastin® PBT thermoplastic polyester which can reduce the cycle time for molding polybutylene terephthalate (PBT) parts by 30% and curtail costs by around 20%. Under Crastin® SF, the new resins come both in non-reinforced form as well as in reinforced versions with 15% or 30% glass fiber. The high flow of Crastin® SF grades opens the way for major reductions in melt temperature, thus saving precious seconds in the duration of hold pressure and cooling, which finally results to time reductions. The Crastin® SF resins are particularly advantageous in molding thin-wall parts such as connectors; large parts such as structural housings and can open the way to cost savings through the use of molds with more cavities. Moreover, a molder can employ a smaller machine, which costs less to buy and to operate as these resins require lower injection pressure.