3DXTech ThermaX PEI 9085 Aerospace-Grade ULTEM™ 9085, On an Open-Material Spool
Aerospace-Grade ULTEM™ 9085, On an Open-Material Spool
A USA-made filament compounded from genuine SABIC ULTEM™ 9085 resin — the flame-retardant, low-smoke PEI that airframers use for cabin and structural parts. High strength and stiffness at temperature, a 186°C glass transition, long-term hydrolytic stability, and broad chemical resistance, printable on any true high-temp FDM machine. Full specifications →
Made in the USA — ships from Rev1. Need Black or Scarlet, a different reel, or help qualifying ULTEM for a flight part? Call (248) 707-2950.
Real ULTEM™ 9085, with a published datasheet behind it.
3DXTech compounds ThermaX PEI 9085 in Grand Rapids, Michigan from genuine SABIC ULTEM™ 9085 resin — the same aerospace PEI used in certified airframe parts, with published print and material data. No mystery PEI. Rev1 Technologies is your authorized 3DXTech reseller and US support partner, Auburn Hills, Michigan.
Genuine ULTEM™ 9085 — without a proprietary machine.
ULTEM™ 9085 is SABIC’s flagship aerospace PEI: a flame-retardant, low-smoke, high-strength polymer chosen for aircraft interior panels, ducting, and structural brackets where a low flame-smoke-toxicity rating and a high strength-to-weight ratio both matter. 3DXTech compounds that exact resin into consistent 1.75 mm filament so you can print certified-grade material on an open high-temperature FDM printer — instead of being locked into a single proprietary cartridge system. ThermaX PEI 9085 is the unfilled grade: the same base ULTEM™ 9085 chemistry, without carbon-fiber reinforcement, for parts that need the resin’s toughness, dimensional stability, and FST behavior in their pure form.
Print end-use parts that survive heat, load, and fire codes.
The aerospace FST resin — now from a spool, on your own printer.
Because it holds strength and stiffness at elevated temperature, resists hydrolysis and a broad range of chemicals, and is inherently flame retardant with low smoke, ULTEM™ 9085 is a go-to for aircraft cabin components, ducting, brackets, and tooling — plus under-hood automotive, sterilizable medical fixtures, and electrical insulators. ThermaX PEI 9085 lets you produce those parts in-house with full lot traceability instead of outsourcing to a service bureau.
Numbers that put it in a class above PC and nylon.
All figures from the 3DXTech ThermaX PEI 9085 technical data sheet (TDS Rev 4.0, ISO-tested). See the full TDS for test methods and the complete property table.
A very high Tg (DSC) means parts keep their shape and stiffness far beyond where PC, ABS, or nylon begin to soften.
Deflection temperature at 0.45 MPa (ISO 75) — sustained load-bearing service at temperatures most thermoplastics can’t reach.
Base-resin V-0 at 1.5 mm with low smoke and low toxicity — the reason ULTEM™ 9085 is specified for aircraft interiors.
Rigid in bending (ISO 178) with a 2170 MPa flexural modulus — strong, dimensionally stable structural parts.
Tensile strength at break (ISO 527) with a 2050 MPa tensile modulus — holds up under real mechanical load.
Light for its performance (ISO 1183) — a high strength-to-weight ratio that makes it attractive for lightweighting metal parts.
It needs a real high-temp printer — here’s what.
These are 3DXTech’s recommended print settings. ULTEM prints hot, is sensitive to moisture, and benefits from an actively heated chamber for warp-free, dimensionally stable parts.
Requires a genuine all-metal high-temp hotend that can reach and hold the high-370°C range.
A high-temperature heated bed with a suitable adhesive for reliable first-layer grip on ULTEM.
An actively heated chamber greatly improves layer bonding, dimensional accuracy, and warp control on larger parts.
PEI is hygroscopic; dry the filament at 120°C for 4 hours and keep it dry for the best surface and strength.
No special abrasion concerns for the unfilled grade — a standard 0.4 mm (or larger) nozzle works well.
No special concerns — run 0.10 mm or thicker; thicker layers build strength and speed on structural parts.
The industries that print ULTEM™ 9085.
ULTEM™ 9085 was engineered for aerospace, and its flame-smoke-toxicity behavior, chemical resistance, and strength-to-weight ratio carry it into every industry that needs a high-temperature engineering polymer.
Natural amber ULTEM — the aerospace standard.
Stocked in natural — black and scarlet on request.
The classic amber ULTEM look, plus opaque options when you need them.
ThermaX PEI 9085 ships as natural amber ULTEM™ — the finish most aerospace and engineering users specify, and the default stocked reel at Rev1. 3DXTech also produces this grade in black and scarlet; ask us to quote those colors or a specific reel size. Every color is the same genuine SABIC ULTEM™ 9085 resin with the same published properties. Choose your reel size in the buy-box, or contact us for case and standing-order pricing.
Check the reel fits your printer.
Standard spool dimensions — confirm it fits your printer or dry box.
3DXTech ships ThermaX PEI 9085 on consistent, standard reels.
Before you buy, check the outer diameter, width, and center bore against your printer’s spool holder, enclosure, or heated dry box — ULTEM should be kept dry and often prints from a heated chamber. Click the diagram to enlarge it, or open the full 3DXTech reel infographic for the exact dimensions of the 750 g and 2 kg spools.
View reel dimensions (PDF) →ULTEM™ 9085 vs. other high-performance polymers.
Approximate positioning among high-temperature options — confirm exact figures against each technical data sheet.
3DXTech’s published property chart.
The quick-reference numbers, straight from the manufacturer.
3DXTech publishes a property chart for ThermaX PEI 9085 (TDS Rev 4.0). Click it to enlarge. For the complete mechanical, thermal, and fire-test data with test methods, request the full technical data sheet in the resources below.
| ThermaX PEI 9085 | Stratasys ULTEM™ 9085 | ThermaX PEEK | |
|---|---|---|---|
| Base resin | SABIC ULTEM™ 9085 | SABIC ULTEM™ 9085 | PEEK (PAEK) |
| Aerospace FST (FAR 25.853) | Yes (base resin) | Yes (certified) | Varies by grade |
| Printer compatibility | Any open high-temp FDM | Stratasys FDM only | Any open high-temp FDM |
| Glass transition (Tg) | 186°C | 186°C | ~143°C (service ~250°C) |
| Approx. price | ~$145 / 750 g | Much higher (OEM cartridge) | Higher |
| Best for | Affordable aerospace-grade FST parts on open machines | Certified OEM aerospace workflow | Maximum continuous temperature + chemical resistance |
Comparison among high-performance printable polymers; ULTEM™ is a registered trademark of SABIC. Prices vary by reel size, supplier, and date — confirm exact properties against each TDS.
3DXTech ThermaX PEI 9085 Technical Data
RESOURCES
Datasheet & Print Support
Everything you need to qualify and print ThermaX PEI 9085.
WHY REV1 TECH
Authorized 3DXTech Reseller. High-Performance 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 high-performance polymer, dial in the high-temp profile, and keep production running.
FAQ
3DXTech ThermaX PEI 9085 — Common Questions
Is this real ULTEM™ 9085?
Yes. 3DXTech compounds ThermaX PEI 9085 from genuine SABIC ULTEM™ 9085 resin — the same aerospace PEI used in certified airframe parts — into 1.75 mm filament, with a published technical data sheet and lot traceability. It is the unfilled grade (no carbon fiber).
What printer do I need?
A true high-temperature FDM printer: an all-metal hotend that holds 350–380°C, a 140–160°C heated bed, and ideally an actively heated chamber. The chamber improves layer bonding and dimensional stability and helps prevent warping on larger parts.
Do I have to dry it?
Yes. PEI is hygroscopic and absorbs moisture from the air, which causes poor surface finish and weak layers. Dry the filament at 120°C for about 4 hours before printing and keep it in a dry box during long prints.
How is this different from CarbonX PEI 9085+CF?
Both use the same ULTEM™ 9085 base resin. ThermaX PEI 9085 is unfilled — the pure resin, with higher elongation and a natural finish. CarbonX PEI 9085+CF adds chopped carbon fiber for much higher stiffness and dimensional stability, in black. Choose unfilled for toughness and FST behavior in pure form; choose CF for maximum rigidity.
How does it compare to PEI 1010 or PEEK?
PEI 9085 is the aerospace FST grade (FAR 25.853 / OSU 65/65 base resin) with a 186°C Tg. PEI 1010 has a higher glass transition (~217°C) and higher strength but is not the FST-certified aerospace grade; PEEK offers the highest continuous-use temperature and chemical resistance. We’ll help you choose.
Is it flame retardant?
Yes — the base ULTEM™ 9085 resin is inherently flame retardant (UL 94 V-0 at 1.5 mm) with low smoke and low toxicity, which is why it is specified for aircraft interiors. Certification always depends on the finished part and its process; talk to us about your requirements.
Which reel size and color should I buy?
Natural is stocked in 750 g and 2 kg reels; pick the reel size in the buy-box — price scales with the spool. Black and scarlet are available on request. Start with a 750 g reel to dial in your profile, then scale to 2 kg for production.
Is it made in the USA?
Yes — 3DXTech manufactures ThermaX PEI 9085 at its facility in Grand Rapids, Michigan, with published data and lot traceability.
Can Rev1 help qualify ULTEM for my application?
Yes. Tell us the service temperature, fire code, chemistry, and loads and our materials team confirms fit, suggests print settings, and can quote case or standing-order pricing. Call (248) 707-2950.