PEI / Ultem 9085
SABIC
☀ UV Stable
⬡ Chemical Resistant
340–380
°C
Print Temp
140–160
°C
Bed Temp
170
°C
Max Service
Overview
Polyetherimide — amber-colored ultra-high-performance thermoplastic used in aerospace, EV, and medical applications. Inherently flame retardant (UL94 V-0), chemically resistant, and rated for continuous service at 170°C. Requires industrial-grade printers.
Properties
Difficulty
expert
Flexibility
rigid
Layer Adhesion
good
Enclosure
required
Heated Bed
required
Dry Storage
required
Pros
- Continuous service temperature 170°C+
- UL94 V-0 inherent flame retardancy
- FAA-certified grades for aircraft interiors
- Excellent strength-to-weight ratio
- Outstanding electrical insulation
- Autoclavable
- Low smoke/toxicity in fire
Cons
- Requires 350-380°C all-metal hotend
- Chamber temperature 130°C+ needed
- Translucent amber color only
- Extremely expensive ($200+/kg)
- Severe warping risk
- Only industrial printers can process it reliably
- Demands expert-level tuning
Best For
- Aerospace interior components (FAR 25.853)|EV battery enclosures|Medical sterilization trays|Electrical housings|Industrial jigs needing 170°C+ HDT|Military applications
Avoid For
- Any standard desktop printer|Cosmetic applications (amber color)|Cost-sensitive projects|Flexible requirements|Beginners
Storage
Store vacuum-sealed. Pre-dry at 120°C for 4h minimum before printing. Absorbs moisture quickly — seal immediately after use. Requires industrial filament dryer.
Brands
3DXTech PEIKimya Ultem 9085SABIC UltemIntamsys PEEK/PEI