3DXTech ThermaX PEI (ULTEM 1010) Unfilled Aerospace-Grade PEI — UL94 V-0, Tg 217°C, USA-Made
Unfilled Aerospace-Grade PEI — UL94 V-0, Tg 217°C, USA-Made
A USA-made polyetherimide (PEI) filament compounded from genuine SABIC ULTEM™ 1010 resin — the benchmark high-performance amorphous polymer for aerospace, medical, and demanding industrial parts. It combines a high glass transition (Tg 217°C) and 208°C heat-deflection temperature with an inherent UL94 V-0 flame rating and low smoke, long-term hydrolytic stability, broad chemical resistance, and exceptional dimensional stability. Because it is unfilled, it stays tough and prints on a standard 0.4 mm nozzle — no hardened steel required. Full specifications →
Made in the USA — ships from Rev1. Need a different diameter, larger reels, or bulk pricing? Call (248) 707-2950.
USA-made PEI from real ULTEM™ 1010 resin, with a published datasheet behind it.
3DXTech compounds ThermaX PEI in Grand Rapids, Michigan at its 68,000 sq ft ISO 9001:2015-certified facility, using genuine SABIC ULTEM™ 1010 resin, with a published technical data sheet — no mystery filament. Rev1 Technologies is your authorized 3DXTech reseller and US support partner, Auburn Hills, Michigan.
The benchmark high-temp polymer — printable, and unreinforced.
ThermaX PEI is a polyetherimide filament compounded from genuine SABIC ULTEM™ 1010 resin — the material engineers reach for when a part has to survive heat, flame, chemicals, and moisture at once. It is amorphous and unfilled, so its performance comes from the base polymer, not a carbon- or glass-fiber filler: it stays tough and dimensionally stable and prints on a standard 0.4 mm nozzle with no hardened steel required. With a glass transition of 217°C, a 208°C heat-deflection temperature, an inherent UL94 V-0 flame rating with low smoke, long-term hydrolytic stability, and broad chemical resistance, it is a go-to for aerospace, medical, and industrial parts that live in punishing environments. 3DXTech compounds it in the USA into consistent, printable filament with a published datasheet.
Heat, flame, and chemical resistance at the top of the plastics world.
ThermaX PEI is built for the most demanding, high-value applications where heat, flame, chemistry, and dimensional stability all matter at once. Numbers below are from the published TDS (Rev 4.0, ISO-tested).
Measured by DSC — a high-Tg amorphous polymer that keeps its properties far above where most engineering plastics soften.
Deflection temperature per ISO 75 — holds shape and load in continuous high-heat service.
Inherently flame retardant with low smoke evolution at 1.5 mm — self-extinguishing behavior from the base resin.
Long-term hydrolytic stability plus broad resistance to automotive fluids, hydrocarbons, alcohols, and aqueous solutions.
Strong and rigid (ISO 178) with a 2510 MPa flexural modulus — high strength and modulus at elevated temperature.
Uniform coefficient of thermal expansion and low creep sensitivity — parts hold tolerance across temperature.
A genuine high-temp printer — but no hardened nozzle needed.
These are 3DXTech's recommended print settings. PEI runs hot, so it needs a genuine high-temp all-metal hotend, a hot bed, and a heated chamber to control warp on this high-Tg polymer. Because it is unfilled, there is no abrasive filler — a standard 0.4 mm nozzle is fine. Dry it thoroughly before printing.
Requires a genuine high-temp all-metal hotend; 3DXTech printed its test specimens at 380–400°C.
A high-temperature heated bed with a suitable adhesive for reliable first-layer grip (specimen bed 130–140°C).
A heated, enclosed chamber is strongly recommended — it improves layer bonding and controls warp on this high-Tg material.
No hardened nozzle required — unfilled PEI is non-abrasive, so a standard brass nozzle works.
3DXTech recommends 0.10 mm or higher; specimens were characterized at 0.25 mm and 100% infill.
PEI is moisture-sensitive — dry the filament at 150°C for about 4 hours and keep it dry for the cleanest, most consistent flow.
Built for aerospace, medical, and demanding industrial parts.
Because it survives high heat, flame, aggressive chemicals, and moisture while staying dimensionally stable, ThermaX PEI lands in the most demanding end-use parts — not just prototypes. ULTEM™ 1010 has long served across aerospace, medical, electronics, semiconductor, and automotive applications.
Black or natural, from a 250 g trial reel to a 2 kg production spool.
ThermaX PEI ships in black and natural (amber-translucent) on 1.75 mm filament, wound on standard reels in four sizes — 250 g to trial the material, 500 g and 1 kg for regular work, and 2 kg for production runs. Pick your color and reel size in the buy-box; the spool preview updates as you choose. Need a different diameter or bulk pricing? Ask us — we can source and quote directly from 3DXTech.
Check the reel fits your printer.
Standard spool dimensions — confirm it fits your AMS or dry box.
3DXTech ships ThermaX PEI on consistent, standard reels in four sizes.
Before you buy, check the outer diameter, width, and center bore against your printer's spool holder, automated material system, or drybox. The reels clear the size requirements of popular automated material systems including the Bambu AMS, Creality CFS, and Anycubic ACE Pro. Open the full 3DXTech reel infographic for exact spool dimensions.
View reel dimensions →ULTEM 1010 vs. ULTEM 9085 vs. polycarbonate.
Approximate positioning among amorphous, high-temp engineering filaments — confirm exact figures against each technical data sheet.
3DXTech's published property chart.
The quick-reference numbers, straight from the manufacturer — click the chart to enlarge it.
3DXTech publishes a property chart for ThermaX PEI so you can size it up fast — density, tensile and flexural strength and modulus, glass transition, deflection temperature, and flame rating. It's small on the page; click it to read the full-size version, and the same figures are in the readable specifications table below.
| ThermaX PEI (ULTEM 1010) | PEI / ULTEM 9085 | Polycarbonate (PC) | |
|---|---|---|---|
| Flame rating | UL94 V-0, low smoke | UL94 V-0, FST-rated | Typically UL94 HB (V-0 grades exist) |
| Heat (Tg / HDT) | Tg 217°C / HDT 208°C (0.45 MPa) | Tg ~186°C / HDT ~175°C | Tg ~147°C / HDT ~110°C |
| Chemical resistance | Excellent — broad, hydrolytically stable | Very good | Moderate (attacked by some solvents) |
| Toughness / impact | High, rigid | Higher elongation, tougher | High |
| Best-known use | Highest heat + chemistry, sterilizable, tooling | Aerospace interiors (FST) | Tough, clear-ish structural parts |
| Printer needs | High-temp hotend (370–400°C) + hot chamber, standard nozzle | High-temp hotend + chamber | High-temp hotend, chamber |
| Approx. price | ~$195/kg | similar | ~$60–90/kg |
Qualitative comparison among amorphous engineering polymers; confirm exact properties against each TDS. Street prices are approximate and vary by reel size and date.
3DXTech ThermaX PEI (ULTEM 1010) Technical Data
RESOURCES
Datasheet & Print Support
Everything you need to qualify and print ThermaX PEI (ULTEM 1010).
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 filament with real print support.
We help you pick the right ultra-high-temp polymer, dial in the profile, and keep production running.
FAQ
3DXTech ThermaX PEI (ULTEM 1010) — Common Questions
Do I need a special printer?
Yes — ThermaX PEI prints around 370–400°C, so you need a genuine high-temp all-metal hotend and a high-temp heated bed (120–160°C). A heated, enclosed chamber is strongly recommended for the best layer bonding and lowest warp. You do not, however, need a hardened nozzle.
Do I need a hardened nozzle?
No. Unlike carbon- or glass-fiber filaments, this ULTEM 1010 grade is unfilled and non-abrasive, so a standard brass 0.4 mm nozzle is fine — your printer's temperature ceiling, not the nozzle, is the limiting factor.
What is the difference between ULTEM 1010 and ULTEM 9085?
Both are PEI. ULTEM 1010 offers the highest heat resistance, the broadest chemical resistance, and biocompatible and food-contact grades — it is the pick for maximum temperature, chemistry, and sterilizability. ULTEM 9085 is tougher with higher elongation and is FST-rated for aircraft interiors. Tell us the part and we'll help you choose.
Is it flame retardant?
Yes — PEI is inherently flame retardant with low smoke evolution and a UL94 V-0 rating (base resin) at 1.5 mm. Note that a UL rating applies to a tested specimen and geometry; printed parts should be validated for your specific application.
Do I have to dry it?
Yes. PEI is moisture-sensitive and prints best bone-dry — dry the filament at 150°C for about 4 hours before printing and store it in a dry box for the cleanest surface and most consistent flow.
What colors and sizes are available? Will it fit my AMS?
3DXTech ships ThermaX PEI in black and natural, 1.75 mm, on 250 g, 500 g, 1 kg, and 2 kg reels sized to clear popular automated material systems including the Bambu AMS, Creality CFS, and Anycubic ACE Pro. If you need another diameter or bulk quantities for a production run, contact us — we can source and quote directly from 3DXTech.
Is it really made with genuine ULTEM?
Yes — 3DXTech compounds ThermaX PEI using genuine SABIC ULTEM™ 1010 resin (ULTEM™ is a registered trademark of SABIC). You get authentic PEI performance with a published data sheet and lot traceability, not an unnamed high-temp blend.
How does ULTEM 1010 compare to PEEK?
Both are top-tier high-performance polymers. PEEK is semi-crystalline with higher continuous-use temperature and even broader chemical resistance, but it is harder to print and more expensive. Unfilled ULTEM 1010 is amorphous, prints with less crystallization-driven warp, carries a UL94 V-0 flame rating, and offers biocompatible and food-contact grades — often the better value when you need extreme heat and flame performance without going all the way to PEEK.
Is it made in the USA?
Yes — 3DXTech manufactures ThermaX PEI at its 68,000 sq ft ISO 9001:2015-certified facility in Grand Rapids, Michigan, with a published data sheet and lot traceability.