PEEK and PEI filament properties
Data taken from 12 datasheets from manufacturers in Spain, Europe, the United States and China, reviewed on October 26, 2026. The shaded bar marks the median of the declared values and each colored tick is a different datasheet. The scales are the same across the whole library, so you can compare materials at a glance.
PEEK and PEI temperature and print settings
| Setting | Typical value | Range in datasheets |
|---|---|---|
| Nozzle | 365–400 °C | 300–420 °C |
| Bed | 125–135 °C | 100–160 °C |
| Print speed | 30–60 mm/s | 30–70 mm/s |
| Drying temperature | 130 °C | 110–150 °C |
| Drying time | 7 h | 7–7 h |
PEEK and PEI vs Polycarbonate, Nylon, and ABS: comparison
Medians from each material's datasheets. Click a material to see its full range.
Meters of PEEK and PEI per spool
Calculated with the median density from the datasheets (1.3 g/cm³). Real spools can vary by a few meters because of diameter tolerance.
What are PEEK and PEI
PEEK (polyether ether ketone) and PEI (polyetherimide) are high-performance polymers: they withstand very high service temperatures, have great mechanical and chemical resistance, are self-extinguishing and are used in aviation, automotive, implants and laboratory equipment. The 12 datasheets analyzed cover both and other polymers of the same family.
Their median glass transition is 162 °C, far above any general-purpose filament.
What printer they need
- Very high-temperature hotend: the datasheets call for the nozzle at 365–400 °C.
- Very hot bed: 125–135 °C.
- Actively heated chamber, closing it is not enough. Without it the part cracks and peels off.
- Intensive drying before printing.
That is why they are materials for industrial printers. If you want heat resistance on a desktop printer, look at polycarbonate or nylon.
Frequently asked questions about PEEK and PEI
Can you print PEEK on a desktop printer?
Not reliably. It needs nozzle and chamber temperatures that only industrial machines reach.