SKU: PEI5010500NAT
FibreX™ PEI+GF30 is an ultra-performance 3D printing filament using 30% glass fiber reinforced ULTEM™ PEI [Polyether Imide] resin. This material combines excellent thermal properties, exceptional dimensional stability, inherent flame retardancy, and very good chemical resistance.

This ultra-performance 30% glass fiber reinforced 3D printing filament is manufactured using real ULTEM PEI (polyether imide) resin from Sabic. Filaments made from ULTEM resin offer the ability to create parts with excellent properties at elevated temperatures due to a high glass transition temperature (Tg) of 217°C.

PEI is an amorphous, high-performance polymer which combines excellent thermal properties, exceptional dimensional stability, inherent flame retardancy, and good chemical resistance.



Benefits of PEI+GF30 Include:

  • High thermal properties, with a Tg of 217°C and HDT of 212°C
  • Inherently flame-resistant
  • Long-term hydrolytic stability, making it easy to steam and autoclave
  • Excellent dimensional stability, low heat creep sensitivity, and a very low, uniform coefficient of thermal expansion create highly reproducible part-to-part dimensions
  • Exceptional strength and stiffness, even at elevated temperatures
  • Good resistance to a broad range of chemicals, include automotive fluids, fully halogenated hydrocarbons, alcohols, and aqueous solutions
  • Stable dielectric constant and dissipation factor over a wide range of temperatures and frequencies


    Automotive / Transportation Applications:  ULTEM™ resins provide automotive manufacturers with a high performance, chemically resistant, thermally-stable, cost-effective alternative to metal that is strong enough to replace steel in some applications and light enough to replace aluminum in others. For applications like transmission components, throttle bodies, ignition components, sensors and thermostat housings,

    Electrical / Electronics Applications:  ULTEM™ resin may be an excellent material choice for today’s demanding electrical applications, including connectors, MCB components like housings, shafts and levers, hard disk drive internals, FOUP’s, BiTS, PCB’s, MCCB internals, Plenum devices, LCD projector internals, fuel cell components and many other applications.

    Filament Specifications:

    • Diameter:  1.75mm (+/- 0.05mm)
    • Colors:  Natural and Black

    Recommended Print Conditions:

    • Extruder Temp: 370 - 390°C
    • Bed Temp: 120 - 160°C
    • Bed Prep: Nano Polymer Adhesive
    • Print Speed:  Print speeds of 20-30mm/s (starting point), faster as results dictate
    • Hardened Nozzle: 0.4mm or larger recommended. We strongly recommend our Hardened Steel Nozzles
    • Enclosure Temp:  ULTEM™ prints best in VERY hot build environment - 90-230ºC

    Annealing Printed Parts:  If needed, parts printed using ULTEM™ PEI may be annealed in a hot-air oven to reduce any printed-in stresses that may be present in the part.  Printed-in stresses may occur in any plastic and may result in lower than expected mechanical properties. If this is an issue with your part, then you can follow the simple 5-step ramp up/down process for annealing the ULTEM™ parts.

    1. Place printed parts in cool, room-temp oven.
    2. Set temp to 300°F and allow to stabilize for 1 hour.  
    3. After 1 hour at 300°F, increase oven temp to 400°F and allow to stabilize 1 additional hour.  
    4. After 1 hour at 400°F, reduce heat back to 300°F and allow to stabilize for 30 minutes.  
    5. After 30 minutes, turn off oven heat and allow printed parts to return to room temp inside the oven as it cools.  

    ULTEM™ is a registered trademark of Sabic Innovative Plastics.

    3DXTECH manufactures this filament using ULTEM™ 1010 PEI resin.

    Download MSDS & Technical Data