PEI / ULTEM

Advanced

Polyetherimide (ULTEM)

A high-performance amorphous thermoplastic developed by SABIC under the ULTEM brand. PEI offers outstanding flame resistance (UL94 V-0), high continuous-use temperature (170°C+), and inherent chemical resistance. It is widely used in aerospace interiors and electronics enclosures where flame, smoke, and toxicity (FST) compliance is critical.

Nozzle Temp350–400°C
Bed Temp130–160°C
Print Speed15–30 mm/s

Printing Tips

  • Requires a high-temperature printer with an all-metal hot end rated above 400°C and a heated chamber above 100°C.
  • PEI is amorphous, so it does not require post-print annealing — parts come off the printer with full mechanical properties.
  • Use a PEI or Kapton (polyimide) build surface — PEI bonds well to its own chemistry.
  • Dry at 150°C for 4-6 hours before printing; PEI absorbs moisture slowly but it severely impacts layer adhesion.
  • Print ULTEM 1010 for higher heat resistance (218°C Tg) or ULTEM 9085 for better impact strength and FST compliance.

Use Cases

Aerospace interior panels and ducting (FAR 25.853 compliant)Electrical connector housings and insulatorsAutoclave-safe tooling and jigsMedical sterilization trays (autoclavable)Under-hood automotive sensor housingsEMI/RFI shielding enclosuresHigh-temperature structural brackets

Compatible Printers

Find PEI / ULTEM slicer settings for your printer — browse all printers and select PEI / ULTEM from the filament selector.

Browse All Printers →

Buy Online

3DXTech ULTEM 9085 1.75mm→3DXTech ULTEM 1010 1.75mm→Intamsys ULTEM PEI Filament→

AI Filament Expert

AI Chat — Coming Soon for Pro subscribers

Ask anything about PEI / ULTEM — printing tips, troubleshooting, material comparisons, and more.

Other Filaments

PLA

190-220°C / 50-60°C

PLA+

200-230°C / 50-70°C

PETG

230-250°C / 80-90°C

ABS

230-260°C / 95-110°C

ASA

240-260°C / 90-110°C

TPU

210-240°C / 40-60°C

Nylon (PA6)

240-280°C / 70-90°C

PC

260-310°C / 100-120°C

HIPS

230-245°C / 90-110°C

PVA

185-215°C / 50-60°C

Wood-fill PLA

180-220°C / 40-60°C

Metal-fill PLA

195-220°C / 50-60°C

Carbon Fiber PETG

230-260°C / 70-85°C

Resin

Resin (UV cure)

Flexible (TPE/TPC)

200-230°C / 30-50°C

Silk PLA

215-230°C / 60-70°C

Matte PLA

195-225°C / 50-65°C

High Speed PLA

190-230°C / 45-60°C

Recycled PLA

190-220°C / 50-60°C

PLA Marble

195-220°C / 50-60°C

Rainbow PLA

195-225°C / 50-60°C

Glow-in-the-dark PLA

195-225°C / 50-60°C

Copper-fill PLA

195-220°C / 50-60°C

Bronze-fill PLA

195-220°C / 50-60°C

Conductive PLA

200-230°C / 50-60°C

Recycled PETG

225-250°C / 75-90°C

Glass-fiber PETG

235-260°C / 80-95°C

CPE

240-270°C / 75-90°C

PC-ABS

250-280°C / 100-115°C

PA6

240-270°C / 80-100°C

PA6-CF

255-280°C / 85-100°C

PA12-CF

260-280°C / 80-100°C

PAHT-CF

280-310°C / 100-120°C

ABS-CF

240-260°C / 90-110°C

Kevlar Nylon

245-275°C / 85-100°C

TPU 95A

210-235°C / 40-60°C

TPU 87A

210-235°C / 40-60°C

TPE

200-230°C / 30-50°C

TPC

210-240°C / 40-60°C

POM

200-220°C / 100-130°C

PP

220-250°C / 85-100°C

PEEK

370-420°C / 130-160°C

BVOH

190-220°C / 50-60°C

Breakaway Support

210-240°C / 50-70°C

PHA

175-200°C / 40-60°C

PEI / ULTEM guides

Want personalized AI settings?

Describe your exact setup and what you are printing. 3DSearch's AI expert generates custom PEI / ULTEM slicer settings for your printer in seconds.

Try 3DSearch →