How to print with Ultem 9085 and 1010 PEI 3D Printing Materials

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Ultem is a very unique material that can be used in various ways in 3D Printing. There are 3D Printers that can print this material for applications that require a strong, high-temp chemical-resistant material. Ultem (PEI) is also used as a bed surface that is great for print bed adhesion. Here are some details about this amazing material.

How to 3D Print with Ultem based PeI filaments

Ultem can be purchased in filament spools for low-grade up to industrial machines. It’s a very tricky material to print with and needs specific conditions for a successful and stable print. This material is recommended for advanced 3D Printers with a controlled temperature enclosure and an all-metal hotend extruder.

Given the difficulty of printing, if you’re looking to have parts commercially made with this material, it is probably best to go through a professional 3D Printing Service with commercial and industrial machines. These machines also Anneal parts in a controlled cooldown process. This reduces any printed-in stresses that may be present in the part.

Ultem 9085

Ultem 9085 filament is a great choice for high-impact and high-stress applications. This material features a high strength-to-weight ratio, and high thermal and chemical resistance. Ultem 9085 resins offer the ability to create parts with excellent properties at elevated temperatures due to a high glass transition temperature (Tg) of 186°C.

ultem 3d printing

Recommended Print Conditions:

  • Extruder Temp: 350 – 380°C (all-metal extruder)
  • Bed Temp: 140 – 160°C
  • Bed Prep: PEI Tape, Polyimide Tape, Lightly sanded FR4 or Perf board.
  • Other:  No cooling fan, Print speeds of 1000mm/min (starting point)

Ultem 1010

Ultem 1010 PEI (Polyether Imide) is a high-performance polymer that combines excellent thermal properties and exceptional dimensional stability. It offers the ability to create parts with excellent properties at elevated temperatures due to a high glass transition temperature (Tg) of 217°C.

ultem 3d printing

Recommended Print Conditions:

  • Extruder Temp: 370 – 390°C
  • Bed Temp: 120 – 160°C
  • Bed Prep: PEI Tape is the ideal build surface
  • Print Speed:  Print speeds of 20-30mm/s (starting point), faster as results dictate
  • Enclosure Temp:  Ultem prints best in a warm to hot build environment

Material Comparisons of Ultem 9085 and Ultem 1010

Material PropertyUltem 9085Ultem 1010Ultem 1010 Difference
Elongation at Break6%3.3%Not as tough as Ultem 9085
Tensile Strength10,400 psi (72 MPa)11,735 psi (81 MPa)More ridged than Ultem 9085
Izod Impact (notched)2.0 ft-lb/in (106 J/m).8 ft-lb/in. (41 J/m)Ultem 1010 is more impact sensitive
HDT at 264 psi307°F (153°C)415°F (213°C)Highest temperature resistance of any FDM material
CertificationsFSTNSF 51, USP Class VI, ISO-10993 and FSTUltem 1010 is Food contact capable, Biocompatible and FST.

Applications of Ultem 9085 and Ultem 1010

Aerospace:  An excellent material for aerospace applications as its properties feature low smoke emission, low smoke toxicity, and an excellent balance of flame retardancy. Ultem 9085 meets FAR 25.853 as well as OSU 65/65 requirements and can be used to make a variety of structural parts.

Automotive:  A high-performance alternative to metal. It is strong enough to replace steel in some applications and can significantly reduce weight by being lighter than aluminum.

Aviation: As this material makes parts with additive manufacturing it can make very lightweight, complex, and strong parts. This makes it a great candidate for the aviation industry.

Electrical:  A great choice for electrical or electronics applications given its high-temperature resistance. It can be used for things like PCBs, Computer Parts, Connectors, Projector housings, and many other components.

Thermoforming and Mold Tooling: A great alternative this material works well for forming and casting parts. Works well as molds, negative casts and even forming dies.

Sheet Metal Tooling and Hydro Forming: These materials can be used in hydro-forming machines and for sheet metal tooling. This offers a rapid die-making process that can also be more cost-effective.


Ultem is a very unique material that is pushing the envelope in additive manufacturing. This material offers so many beneficial properties making it very useful in many applications. It does cost more than traditional materials and is also very difficult to print with so going through a professional 3D Printing Service with commercial machines is recommended. Ultem will be used more and more as it grows in popularity and it will be interesting to see what new things are made with this cutting-edge material.

Check out our article on Octoprint vs Astroprint Control your 3D Printer Remotely

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Garrett Dunham

A trained Mechanical Engineer and lifelong tinker, Garrett chose to attend Cal Poly San Luis Obispo's engineering proram because they had a 3D printer... back when they were called "rapid prototypers". "The first time I held something I designed and 3D printed, my mind exploded. Just hours earlier my idea was just a thought - and now it's a thing I'm holding." Now, years later, Garrett brings his love of tinkering, inventing, engineering, and 3D printing to the Makershop community.