Crastin® Hydrolysis Resistant Grades

Cable Connectors

Second Generation of Hydrolysis Resistant Crastin® PBT for Connectors

PBT polybutylene terephthalate, when exposed to heat and humidity, reduces polymer chain length, which eventually causes property loss with time. Crastin® HR (Hydrolysis Resistant) has been designed to ensure maximum product stability, even in extremely severe environments. The extended life time of Crastin® HR is therefore even better suited to meet new customer needs.

DuPont™ Crastin® HR5315HFS, HR5330HFS

While keeping the same dry as molded and hydrolysis performance properties as the previous Crastin® HR generation, both Crastin® HR5315HFS and Crastin® HR5330HFS have been developed to offer outstanding melt stability during molding. Long-term molding trials as well as extensive customer collaboration, have proven the process flexibility of the new Crastin® HR HFS products versus the existing PBT HR grades on the market. This unique combination allows a wider processing window, including the use of hot-runners and regrind, without sacrificing the best-in-class hydrolysis resistant product properties.


  • Direct Drop-in solution vs existing Crastin® HR grades.
  • Unique material offering a perfectly balanced offering of best-in-class hydrolysis protection and improved melt stability.
  • Increased productivity through wider processing window vs competitive PBT HR resins.
  • Cost reduction thanks to a regrind level of up to 30%
  • Better color stability in demanding processing conditions.
  • Laser markability (black color)
  • Complex shapes with thinner walls, allowing high design flexibility and size reduction (miniaturization).
  • Best in Class CTI (600 V for Natural/Orange*Colors) for HR materials.


Crastin® HR5315HFS NC010
Crastin® HR5330HFS NC010

Crastin® Hydrolysis Resistant Data