Heat capability
The appropriate service temperature depends on the exact grade, load and application.
HIGH PERFORMANCE PLASTICS
PES / PESU(Polyethersulfone)
A heat-resistant sulfone polymer used in demanding parts and membranes.
Polymer / material family
THE NAME, EXPLAINED
What is PES / PESU?
PES / PESU means Polyethersulfone.
A heat-resistant sulfone polymer used in demanding parts and membranes.
Worth knowing
PES can mean polyester in textile labelling; PESU identifies polyethersulfone more clearly. Membranes may contain support layers or residues.
WHY MANUFACTURERS CHOOSE IT01 02 03
Properties with a practical purpose.
Dimensional stability
Helps a component keep its intended shape and size in its service conditions.
Hydrolysis resistance
Resistance to degradation associated with water exposure, especially when warm.
Properties vary with formulation, reinforcement, moisture, processing and service conditions. Use the exact grade data sheet for engineering decisions.
THE NEXT-CYCLE QUESTION
What matters when considering recovery?
A known grade and a clean, separated batch make the recycling enquiry more useful. A route must still be agreed.
PES can mean polyester in textile labelling; PESU identifies polyethersulfone more clearly. Membranes may contain support layers or residues.
Poly-Cycle can discuss your material information and collection requirements. Inclusion in this guide does not confirm acceptance, a particular recycling method or that every operation takes place at a Poly-Cycle facility.
How assessment and collection workMake the enquiry easier
- Confirm the identity. Keep the manufacturer, trade grade and polymer marking. For an additive or chemical, include the safety data sheet.
- Describe the batch. Give the weight, colour and form: pellets, parts, sheet, film, fibre or another format.
- Explain what else is present. Declare fillers, coatings, metal inserts, other polymers and previous contact with chemicals or other contaminants.
- Agree the route. Share photographs and your collection postcode before arranging a movement.
FROM THE GUIDE TO YOUR MATERIAL
Have PES / PESU to discuss?
Send the team your grade details, approximate quantity and photographs. We can discuss the information needed for your particular batch.
KEEP EXPLORING
Browse High Performance Plastics Related material guides.
PPSU
Polyphenylsulfone
A tough, high-temperature sulfone polymer used for demanding technical parts.
Understand this material PSUPolysulfone
A rigid, high-temperature polymer used where hot water, dimensional stability or electrical performance are important.
Understand this materialTechnical references and reading
General material information reviewed 1 November 2026. Manufacturer information supports the material descriptions; recycling enquiry guidance is an editorial synthesis, not a statement of a supplier’s or Poly-Cycle’s acceptance criteria.
Browse this guide under: High Performance Plastics. The original category inventory was informed by RM Group’s plastics directory; explanations have been written for Poly-Cycle.