3DXTech ThermaX PEI 9085 Pellets Aerospace-Grade ULTEM™ 9085 Resin for Your Own Extrusion
Aerospace-Grade ULTEM™ 9085 Resin for Your Own Extrusion
The same aerospace-grade PEI 9085 resin behind 3DXTech’s ThermaX filament — supplied as natural pellets for shops that run their own extrusion. Feed a high-temp filament extruder (Filabot, Filastruder, or any rig set up for high-temperature polymers) or a pellet-fed system, and work with ULTEM™ 9085’s flame-smoke-toxicity pedigree at resin cost. Full specifications →
Availability and lead time vary by pail size — contact Rev1 to confirm before ordering. Extruding 9085 for the first time? Call (248) 707-2950 and talk it through with our materials team.
Genuine ULTEM™ 9085 resin, with a real datasheet behind it.
3DXTech compounds its ThermaX PEI 9085 in the USA with a published technical data sheet and lot traceability — the same resin family trusted for aerospace interior parts, supplied as extrusion-ready pellets. Rev1 Technologies is your authorized 3DXTech reseller and US support partner, Auburn Hills, Michigan.
The 9085 you know — before it becomes filament.
Most shops meet ULTEM™ 9085 on a spool. These pellets are the step before that: the same PEI 9085 resin 3DXTech extrudes into its ThermaX filament, packaged for shops that run the extrusion themselves. If you operate a filament extruder set up for high-temperature polymers — a Filabot, a Filastruder, or a production line — you can draw your own 9085 filament, tune diameter and throughput to your process, and buy the polymer at resin cost instead of finished-spool cost. The same pellets feed granulate-fed extrusion systems directly. What you’re working with is the aerospace-pedigree grade: inherently flame-retardant PEI with the flame/smoke/toxicity behaviour that made 9085 the standard for aircraft interior applications.
This is a high-temperature material — your extruder has to be built for it.
9085 processes at temperatures ordinary desktop extruders never reach.
Extruding PEI 9085 takes 330–350 °C at the die and disciplined drying beforehand — 150 °C for 4–6 hours, because wet resin extrudes with visible bubbles in the strand. If your rig is set up for PLA and PETG, this is not the pellet to start with. If it’s built for high-temp engineering polymers, 9085 pellets are one of the most capable feedstocks you can load.
The numbers that made 9085 an aerospace standard.
Figures from the 3DXTech ThermaX PEI 9085 technical data sheet (TDS Rev 4.0) — the same ULTEM™ 9085 resin as these pellets, characterised on printed specimens. See the full TDS for methods.
High thermal stability (DSC) — parts made from 9085 keep their properties far beyond what commodity polymers survive.
Deflection temperature at 0.45 MPa (ISO 75) — structural stability at service temperatures that soften ABS and PC.
The base ULTEM™ 9085 resin carries a V-0 rating at 1.5 mm — the FST pedigree that put this polymer in aircraft interiors.
Printed-specimen strength (ISO 527) with 2,050 MPa tensile modulus — engineering-grade structural performance.
Flexural strength (ISO 178) with a 2,170 MPa flexural modulus on printed specimens.
Consistent density (ISO 1183) — excellent strength-to-weight for aerospace and transportation hardware.
Dry hard, run hot — 3DXTech’s own recommendations.
Straight from 3DXTech’s processing guidance for PEI 9085 pellets. Get the drying right and the extrusion follows.
Dry before extrusion — a dedicated dryer or toaster oven works. 3DXTech’s own advice: don’t use the kitchen oven your family eats from.
Give the resin the full cycle. Wet 9085 extrudes with bubbles in the strand — if you see them, dry longer before processing.
Die temperature range, tuned to how your heater bands, thermocouple, and PID are configured.
Filabot, Filastruder, or any extrusion rig set up for high-temperature polymers — commodity-polymer rigs need not apply.
Undyed natural resin — what you compound or print downstream is up to you.
PEI is hygroscopic — keep pellets sealed and dry between runs, and re-dry after exposure.
Three shops that buy 9085 by the pail.
Pellets make sense when you control the extrusion step yourself.
What these pellets become.
3DXTech draws this exact resin into ThermaX PEI 9085 filament.
Qualified, tolerance-controlled, and ready for the printer — no extrusion step on your side.
If your throughput doesn’t justify running an extruder — or you need diameter tolerance that’s already qualified — the finished ThermaX PEI 9085 spool is the same ULTEM™ 9085 resin with the extrusion step done by 3DXTech. Rev1 stocks both formats, so you can start on spools and move to pellets when volume demands it.
View ThermaX PEI 9085 filament →Which format of 9085 should you buy?
Same resin, different point in the chain — the honest trade-offs.
| PEI 9085 Pellets | ThermaX PEI 9085 Filament | CarbonX PEI 9085+CF | |
|---|---|---|---|
| Format | Natural pellets, 10 / 25 kg pails | Spooled filament, ready to print | Spooled CF-reinforced filament |
| You need | High-temp extruder + dryer | High-temp 3D printer | High-temp 3D printer + hardened nozzle |
| Cost per kg | Lowest — resin cost | Higher — includes precision extrusion | Highest — CF compound |
| Diameter control | Yours to manage | 3DXTech-controlled tolerance | 3DXTech-controlled tolerance |
| Best for | Filament making, pellet-fed systems, R&D | Production printing without extrusion overhead | Stiffness-critical aerospace hardware |
Qualitative comparison within the 3DXTech 9085 family; confirm exact properties against each TDS. Availability and pricing vary by size and date.
3DXTech ThermaX PEI 9085 Pellets — Technical Data
RESOURCES
Datasheets & Extrusion Support
Everything you need to qualify and process PEI 9085 pellets.
WHY REV1 TECH
Authorized 3DXTech Reseller. Engineering Materials Specialists.
Rev1 Technologies is an authorized 3DXTech reseller in Auburn Hills, MI, supplying genuine USA-made engineering polymers in every format — pellets, filament, and CF compounds — with real process support.
We help you pick the right 9085 format, dial in the process, and keep material flowing.
FAQ
ThermaX PEI 9085 Pellets — Common Questions
What are PEI 9085 pellets for?
They’re extrusion feedstock — the same ULTEM™ 9085 resin behind ThermaX filament, supplied as natural pellets. Feed a high-temp filament extruder (Filabot, Filastruder, or similar) to draw your own filament, or run them in a pellet-fed extrusion system.
Can I print these directly?
Only on granulate/pellet-fed systems designed for high-temperature polymers. For a standard filament printer, either extrude these into filament first or buy the finished ThermaX PEI 9085 spool — we stock both.
How do I dry them?
150 °C for 4–6 hours before extrusion. A dedicated dryer or a toaster oven works — 3DXTech’s own advice is to keep the family kitchen oven out of it. Wet resin shows up as bubbles in the extruded strand; if you see them, dry longer.
What extrusion temperature?
330–350 °C at the die, adjusted for how your heater bands, thermocouple, and PID are configured. Your extruder must be rated for high-temperature polymers.
Is this real ULTEM™ 9085?
Yes — ThermaX PEI 9085 is made using genuine ULTEM™ 9085 resin (ULTEM™ is a registered trademark of SABIC). The base resin carries a UL 94 V-0 rating at 1.5 mm and the flame/smoke/toxicity pedigree the grade is known for.
What sizes do pails come in?
10 kg and 25 kg. Pick the size in the buy-box — the 25 kg pail is the better per-kilogram value if your throughput justifies it.
Pellets or finished filament — which should I buy?
Buy pellets if you control the extrusion step and want resin economics or custom diameters. Buy the ThermaX PEI 9085 spool if you want qualified, tolerance-controlled filament ready for the printer. Unsure? Tell us your setup and we’ll advise honestly.
Are the properties the same as the filament?
The quoted figures come from the ThermaX PEI 9085 TDS, characterised on printed specimens of the same resin. Your extrusion and printing process will influence final part properties — qualify your own process for critical applications.
Can Rev1 help me set up extrusion?
Yes. Tell us your extruder, drying setup, and target diameter, and our materials team will help you dial in the process and pick the right pail size. Call (248) 707-2950.