3DXTech ThermaX PEKK-A Aerospace-Grade Amorphous PEKK — Easier to Print Than PEEK
Aerospace-Grade Amorphous PEKK — Easier to Print Than PEEK
A USA-made, unfilled amorphous PEKK (PolyEtherKetoneKetone) built on Arkema Kepstan resin — one of the highest-performance polymers you can 3D print, with a ~260°C continuous-use temperature, broad chemical resistance, and inherent UL94 V-0 flame retardance. The amorphous (“A”) grade is substantially easier to print than PEEK, so you can produce real high-performance parts without a fully crystallizing chamber. Full specifications →
Made in the USA — ships from Rev1. Need black, a larger reel, a case, or help qualifying PEKK for your part? Call (248) 707-2950.
USA-made PEKK, with a real datasheet behind it.
3DXTech compounds ThermaX PEKK-A in Grand Rapids, Michigan using Arkema Kepstan PEKK, with published mechanical, thermal, and flammability data — no mystery high-temp filament. Rev1 Technologies is your authorized 3DXTech reseller and US support partner, Auburn Hills, Michigan.
Real PEKK parts — without the pain of printing PEEK.
PEKK (PolyEtherKetoneKetone) sits at the very top of the engineering-polymer pyramid alongside PEEK and ULTEM: exceptional strength, an extremely high service temperature, broad chemical and hydrolysis resistance, and inherent flame retardance. 3DXTech’s ThermaX PEKK-A is the amorphous grade — built on Arkema Kepstan resin and compounded in the USA into consistent filament that prints far more easily than semi-crystalline PEEK, with less warping and a wider processing window. That lets you produce brackets, manifolds, connectors, seals, and end-use components in a genuine high-performance polymer instead of machining them from billet.
The performance of PEEK, engineered to print.
The same polymer family used in aerospace, oil & gas, and medical hardware — now from a spool.
The amorphous “A” grade trades a little of PEEK’s crystalline peak-temperature for a much friendlier print process: it doesn’t depend on aggressive chamber crystallization, so it warps less and is more forgiving on a high-temp FFF machine. You still get a ~260°C continuous-use temperature, broad chemical resistance, low moisture absorption, and UL94 V-0 flame retardance. It ships in Natural and Black, in 1.75 mm.
Numbers that put it in the PEEK / ULTEM class.
All figures from the 3DXTech ThermaX PEKK-A published property chart and technical data sheet — see the chart and the full specifications table below for test methods.
Long-term use temperature far beyond engineering plastics like PC or nylon, with a 162°C glass transition and a 335°C melt point.
Strength at break with a 2750 MPa tensile modulus — strong and stiff under sustained mechanical load.
Inherently flame retardant with low smoke and toxicity — no added halogenated flame retardants.
Holds its shape under load at high temperature — suited to under-hood and downhole environments.
Rigid in bending with a 2680 MPa flexural modulus — stiff, dimensionally stable parts.
Resists most solvents, fuels, and hydrolysis with low moisture uptake — survives aggressive cleaning.
A real high-temp printer — but more forgiving than PEEK.
PEKK-A still prints hot and must be dried, but as an amorphous grade it’s more tolerant than PEEK. These are 3DXTech’s recommended starting settings.
A genuine high-temp, all-metal hotend that can hold the high-350°C range is required.
A high-temp heated bed plus a suitable adhesive for reliable first-layer grip.
A heated chamber is recommended for the best layer bonding and dimensional stability on larger parts.
Dry the filament thoroughly and keep it dry — residual moisture ruins surface quality and strength.
The amorphous grade doesn’t rely on crystallization, so it warps less and is easier to dial in than PEEK.
Annealing can further raise thermal and chemical performance for the most demanding parts.
The industries that print PEKK.
3DXTech PEKK — Product Spotlight
Natural or black — the same high-performance PEKK.
ThermaX PEKK-A ships in two colors: a warm Natural (the raw PEKK tone you see on the spool) and a deep Black. Both print the identical Arkema Kepstan formulation, so you can standardize your profile and simply choose the finish. It’s offered in 1.75 mm on 750 g and 2 kg reels — pick your reel size in the buy-box above, or ask us about black stock, cases, and standing-order pricing.
Check the reel fits your printer.
Standard spool dimensions — confirm it fits your AMS or dry box.
3DXTech ships PEKK-A on consistent, standard reels.
Before you buy, check the outer diameter, width, and center bore against your printer’s spool holder, high-temp material system, or drybox. 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 →PEKK-A vs. PEEK vs. PEI / ULTEM.
3DXTech’s published property chart, then approximate positioning among printable high-performance polymers — confirm exact figures against each TDS.
3DXTech’s published property chart.
The quick-reference numbers, straight from the manufacturer.
3DXTech publishes a property chart for ThermaX PEKK-A — density, tensile and flexural strength, glass transition, deflection temperature, and UL94 rating. It’s small on the page, so click it to read the full-size version; the same figures are in the readable specifications table below with the complete mechanical and thermal data.
| ThermaX PEKK-A | PEEK | PEI / ULTEM | |
|---|---|---|---|
| Continuous use temp | ~260°C | ~250°C | ~170–215°C |
| Glass transition (Tg) | 162°C | ~143°C | ~217°C |
| Printability | Easier (amorphous) | Hard (crystalline, chamber) | High (chamber) |
| Chemical resistance | Excellent | Excellent | Good |
| Flammability | UL94 V-0 | V-0 | V-0, FST-rated |
| Best for | PEEK-class performance, easier to print | Max temp + crystallinity | FST-rated, dimensional stability |
Comparison among printable high-performance polymers; confirm exact properties against each TDS. Prices vary by reel size, retailer, and date.
3DXTech ThermaX PEKK-A Technical Data
RESOURCES
Datasheet & Print Support
Everything you need to qualify and print ThermaX PEKK-A.
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 PEKK-A — Common Questions
What’s the difference between PEKK-A and PEEK?
PEKK-A is the amorphous grade of PEKK. It reaches PEEK-class temperature and chemical resistance (~260°C continuous, 162°C Tg) but is substantially easier to print — it doesn’t depend on aggressive crystallization, so it warps less and has a wider processing window than semi-crystalline PEEK.
What printer do I need?
A genuine high-temperature printer: an all-metal hotend that holds 345–375°C, a 120–140°C heated bed, and ideally a heated chamber (70–150°C) for the best results on larger parts. Dry the filament at 120°C for 4 hours first.
What colors and sizes are available?
ThermaX PEKK-A comes in Natural and Black, in 1.75 mm, on 750 g and 2 kg reels. Pick your reel size in the buy-box; ask us about black stock and case pricing.
Is it flame retardant?
Yes — PEKK-A is inherently UL94 V-0 with low smoke and toxicity, without added halogenated flame retardants, which is why it’s used in aerospace interiors and rail.
Do I need to anneal it?
Not for every part. Annealing is an optional post-process that can further raise thermal and chemical performance for the most demanding applications. We can share a recommended drying and annealing procedure.
Is it made in the USA?
Yes — 3DXTech compounds ThermaX PEKK-A in Grand Rapids, Michigan using Arkema Kepstan PEKK, with a published technical data sheet and lot traceability.