3DXTech ThermaX PPSU Ultra-High-Temp Polyphenylsulfone — Autoclavable, UL94 V-0, USA-Made
Ultra-High-Temp Polyphenylsulfone — Autoclavable, UL94 V-0, USA-Made
A USA-made polyphenylsulfone (PPSU/PPSF) filament — one of the highest-performance polymers in the plastics world. It pairs extreme heat resistance (Tg 230°C, thermal performance beyond Ultem 1010) with exceptional toughness, a UL94 V-0 flame rating with low smoke, and the ability to survive repeated steam autoclave, EtO, and radiation sterilization. An engineering filament for medical, aerospace, and hot-fluid parts that must stay tough, dimensionally stable, and hydrolytically stable at temperatures that melt most plastics — and it prints on a standard, hardened-free 0.4 mm nozzle. Full specifications →
Made in the USA — ships from Rev1. Need larger reels, a different diameter, or bulk pricing? Call (248) 707-2950.
USA-made ultra-high-temp PPSU, with a real datasheet behind it.
3DXTech compounds ThermaX PPSU in Grand Rapids, Michigan at its 68,000 sq ft ISO 9001:2015-certified facility, with a published technical data sheet — no mystery filament. Rev1 Technologies is your authorized 3DXTech reseller and US support partner, Auburn Hills, Michigan.
Extreme heat, steam, and sterilization — handled, without reinforcement.
ThermaX PPSU is an amorphous polyphenylsulfone — an aromatic sulfone long regarded as one of the highest-performance polymers available. Its performance comes from the base polymer, not a carbon- or glass-fiber filler, so it is unreinforced — exceptionally tough and dimensionally stable, and printable on a standard 0.4 mm nozzle with no hardened steel required. With a glass transition of 230°C (thermal performance beyond Ultem 1010), a UL94 V-0 flame rating with low smoke evolution, and the ability to survive repeated steam autoclave, EtO, and radiation sterilization, it is a go-to for medical, aerospace, hot-fluid, and electrical parts that live in punishing heat and moisture. 3DXTech compounds it in the USA into consistent, printable filament with a published datasheet.
Heat, toughness, and sterilizability at the top of the plastics world.
ThermaX PPSU is built for the most demanding, high-value applications where heat, steam, flame, and toughness all matter at once. Numbers below are from the published TDS (Rev 3.0, ISO-tested).
Measured by DSC — an extremely high-Tg amorphous polymer with thermal performance beyond Ultem 1010.
Deflection temperature per ISO 75 — holds shape and load far above where most engineering plastics soften.
Inherently flame retardant with low smoke evolution — self-extinguishing behavior from the base resin.
Survives repeated steam autoclaving plus EtO gas, radiation, plasma, dry-heat, and cold sterilization.
Strong and tough (ISO 178), with 55 MPa tensile strength — ductile, high-impact, not brittle.
Resists hot water, steam, and automotive fluids like gasoline and oils, with excellent dimensional stability and low creep.
A genuine ultra-high-temp printer — but no hardened nozzle needed.
These are 3DXTech's recommended print settings. PPSU is a sulfone that runs hotter than almost any other filament, so it needs a genuine ultra-high-temp all-metal hotend and a hot bed. Because it is unreinforced, there is no abrasive filler — a standard 0.4 mm nozzle is fine. Dry it before printing and use a heated, enclosed chamber.
Requires a genuine ultra-high-temp all-metal hotend; 3DXTech printed its test specimens at 390–410°C.
A high-temperature heated bed with a suitable adhesive for reliable first-layer grip on a high-shrink polymer.
A heated, enclosed chamber is strongly recommended — it improves layer bonding and controls warp on this high-Tg material.
No hardened nozzle required — PPSU is unfilled and non-abrasive, so a standard brass nozzle works.
3DXTech characterized specimens at 0.25 mm and 100% infill; tune finer for detail or thicker for speed.
Dry the filament at 120°C for about 4 hours and keep it dry for the cleanest surface and most consistent flow.
Built for medical, aerospace, and hot-fluid end-use parts.
Because it survives extreme heat, repeated sterilization, steam, and aggressive chemicals while staying tough and dimensionally stable, ThermaX PPSU lands in the most demanding end-use parts — not just prototypes. Polyphenylsulfone has long served across medical, aerospace, defense, automotive, electronics, and semiconductor applications.
Natural, on a standard 500 g reel.
ThermaX PPSU ships in natural (amber-translucent) on 1.75 mm filament, wound on a standard 500 g reel that fits popular automated material systems — the 500 g spool clears the size requirements of the Bambu AMS, Creality CFS, and Anycubic ACE Pro. Need a different diameter, larger reels, or a bulk run? 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 PPSU on a consistent, standard 500 g reel.
Before you buy, check the outer diameter, width, and center bore against your printer's spool holder, automated material system, or drybox. The 500 g reel clears the size requirements of the Bambu AMS, Creality CFS, and Anycubic ACE Pro. Open the full 3DXTech reel infographic for exact spool dimensions.
View reel dimensions →PPSU vs. PEI/Ultem vs. polycarbonate.
Approximate positioning among amorphous, high-temp engineering filaments — confirm exact figures against each technical data sheet.
| ThermaX PPSU | PEI / Ultem | Polycarbonate (PC) | |
|---|---|---|---|
| Flame rating | UL94 V-0, low smoke | UL94 V-0 | Typically UL94 HB (V-0 grades exist) |
| Heat (Tg / HDT) | Tg 230°C / HDT 190°C (0.45 MPa) | Tg ~217°C / HDT ~200°C | Tg ~147°C / HDT ~110°C |
| Toughness / impact | Exceptional — the toughest sulfone, ductile | High, but more notch-sensitive | High |
| Sterilization | Steam autoclave, EtO, radiation, plasma | Steam, EtO, radiation | Limited (some methods degrade it) |
| Chemical / hydrolytic | Excellent, repeated steam & hot water | Excellent (some chlorinated-solvent attack) | Moderate (attacked by some solvents) |
| Printer needs | Ultra-high-temp hotend (360–410°C) + hot chamber, standard nozzle | Ultra-high-temp hotend + chamber | High-temp hotend, chamber |
| Approx. price | ~$250/kg | ~$200/kg+ | ~$60–90/kg |
| Best for | Autoclavable, hydrolytically-stable, tough high-heat parts | Stiff, high-heat, flame-rated structural parts | Tough, clear-ish structural parts |
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 PPSU Technical Data
RESOURCES
Datasheet & Print Support
Everything you need to qualify and print ThermaX PPSU.
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 PPSU — Common Questions
Do I need a special printer?
Yes — ThermaX PPSU prints around 360–410°C, so you need a genuine ultra-high-temp all-metal hotend and a high-temp heated bed (140–160°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, PPSU is unreinforced 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.
Why choose PPSU over PEI/Ultem?
PPSU is the tougher, more ductile sulfone with excellent hydrolytic stability — it shrugs off repeated steam and autoclave cycles that can be harder on some grades. Its glass transition (230°C) and thermal performance rival or exceed Ultem 1010, so for autoclavable, hot-water, and high-impact parts PPSU is often the better pick. For maximum stiffness at temperature, PEI can edge it — tell us the part and we'll help you choose.
Can I sterilize printed PPSU parts?
Yes — polyphenylsulfone withstands repeated steam autoclaving as well as EtO gas, radiation, plasma, dry-heat, and cold sterilization. As always, validate finished printed parts for your specific application, since printed geometry and orientation affect performance.
Is it flame retardant?
Yes — PPSU 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. Like other sulfones it prints best bone-dry — dry the filament at 120°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 currently ships ThermaX PPSU in natural, 1.75 mm, on a 500 g reel that is sized to clear popular automated material systems including the Bambu AMS, Creality CFS, and Anycubic ACE Pro. If you need another diameter or larger reels for a production run, contact us — we can source and quote directly from 3DXTech.
Is PPSU the same as Radel?
PPSU (polyphenylsulfone, sometimes abbreviated PPSF) is the polymer class; Radel is Solvay's well-known PPSU brand. ThermaX PPSU brings that proven sulfone chemistry — extreme heat, toughness, hydrolytic stability, and flame retardance — to FDM/FFF filament.
Is it made in the USA?
Yes — 3DXTech manufactures ThermaX PPSU at its 68,000 sq ft ISO 9001:2015-certified facility in Grand Rapids, Michigan, with a published data sheet and lot traceability.