Heat capability
The appropriate service temperature depends on the exact grade, load and application.
HIGH PERFORMANCE PLASTICS
PEI(Polyetherimide)
A high-performance, often amber-coloured plastic used in precise components exposed to heat.
Polymer / material family
THE NAME, EXPLAINED
What is PEI?
PEI means Polyetherimide.
A high-performance, often amber-coloured plastic used in precise components exposed to heat.
Worth knowing
Record the exact grade, fillers and approval requirements. A high-value polymer still needs an agreed recovery route.
WHY MANUFACTURERS CHOOSE IT01 02 03
Properties with a practical purpose.
Stiffness
A stiff material resists deformation under a load.
Electrical performance
This is a typical reason for selecting suitable grades. Check the manufacturer’s data sheet for the actual formulation and service conditions.
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.
Record the exact grade, fillers and approval requirements. A high-value polymer still needs an agreed recovery route.
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 PEI 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.
PEEK
Polyether ether ketone
A high-performance thermoplastic used when demanding mechanical, temperature and chemical conditions rule out many ordinary plastics.
Understand this material PPSUPolyphenylsulfone
A tough, high-temperature sulfone polymer used for demanding technical parts.
Understand this material PPSPolyphenylene sulfide
A high-performance engineering thermoplastic used for stable components in hot or chemically demanding environments.
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.