1. High temperature performance
  2. Dimensional stability
  3. Inherently flame retardant


  1. Cost
  2. Chemical resistance
  3. High process temperatures


Polyethersulfone (PES) has an outstanding ability to withstand exposure to elevated temperatures in air and water for prolonged periods.

Even though PES is a high-temperature engineering thermoplastic, it can be processed on conventional plastics processing equipment.

High mold temperatures generally assist mold fill and reduce molded-in stresses.

Because PES is amorphous, mold shrinkage is low and is suitable for applications requiring close tolerances and little dimensional change over a wide temperature range.

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