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PEI 9085 Pellets


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139,00 €
139,00 €

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PEI pellets with excellent properties, suitable for aerospace applications.

In the world of FDM/FFF 3D printing, there is a family of materials that stands out clearly above all others, the PAEK family (polyaryletherketone or polyaryletherketone ether ketone). The materials belonging to this class are semi-crystalline plastics, which withstand high temperatures (around 200 ºC) while maintaining high mechanical strength values.

The PAEK family includes PEEK, PEKK and PEI. All of them have high mechanical strength, chemical resistance and high temperature flammability.

PEI 9085 pellets are one of the materials offered by 3DXtech, a renowned North American manufacturer specialising in technical materials for professional applications. PEI 9085 is a high performance material manufactured with Sabic's ULTEM™ 9085 resin. This resin is FAA approved for FST (Flame/Smoke/Toxicity) applications and complies with FAR 25.853 and OSU 65/65.

PEI is a high-performance amorphous polymer. PEI 9085 pellets are small cylinders of the highest quality material. They do not incorporate recycled or reclaimed material. Because of these qualities, PEI 9085 pellets are perfect for 3D printing, achieving high print quality. There are several methods for using pellets in 3D printing:

  • PEI 9085 pellets can be used in the manufacture of filament for FDM 3D printers using Filastruder or any other filament extruder.
  • It is possible to use a pellet extruder to 3D print directly.

With the combination of PEI 9085 pellets and a good filament extruder such as Filastruder, it is possible to obtain 3D printing filament with qualities similar to those of a commercial PEI 9085 filament such as ThermaX™ PEI 9085.
When using PEI 9085 Pellets to make filament with a filament extruder such as Filastruder or using a pellet extruder for direct 3D printing, it should be noted that the extrusion temperature must be regulated in relation to the extrusion speed used. For optimal results, it is recommended to read the product's usage tips.

Filaments made from PEI 9085 pellets offer the possibility to create parts with excellent properties at elevated temperatures thanks to a high glass transition temperature of 186 °C. Thus, 3D printed parts made from PEI 9085 combine excellent thermal properties, exceptional dimensional stability, inherent flame resistance and good chemical resistance.

The most outstanding properties of 3DxTech PEI 9085 pellets are:

  • High thermal properties. Glass transition temperature of 186 °C.
  • Inherent flame resistance with low smoke evolution and low smoke toxicity.
  • Long term hydrolytic stability.
  • Excellent dimensional stability and highly reproducible part-to-part dimensions.
  • Good resistance to a wide range of chemicals such as automotive fluids, fully halogenated hydrocarbons, alcohols and aqueous solutions.
  • Stable dielectric constant and dissipation factor over a wide range of temperatures and frequencies.

Due to these properties, PEI 9085 is an ideal material for:

  • Aerospace applications, thanks to the excellent balance between flame retardancy, low smoke emission and low smoke toxicity PEI 9085 pellets are an excellent candidate for this type of application. ULTEM™ 9085 complies with FAR 25.853 and OSU 65/65 with low toxicity, smoke and flame evolution. Ultem™ resins are found in applications such as personal service units, oxygen panels and components, ventilation system components, connectors, cable ducts, latches, hinges, food tray containers, door handles, interior trim parts, etc.
  • Automotive and transportation applications, providing automotive manufacturers with a cost-effective, high performance, chemically resistant and thermally stable alternative to metal that is strong enough to replace steel in some applications and light enough to replace aluminium in others. For applications such as transmission components, throttle bodies, ignition components, sensors and thermostat housings, etc.
  • Electrical/electronic applications, making it an excellent choice of material for today's demanding electrical applications, including connectors, MCB components such as 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.

This material is an advanced material that requires the use of an industrial 3D printer that reaches printing temperatures of 350-380 °C and a bed temperature of 140-160 °C. Due to its difficulty in printing, this material is recommended for expert users.

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To use PEI 9085 pellets, whether for filament manufacturing or direct 3D printing, you need a great deal of experience in the 3D printing industry and a filament extruder or a qualified 3D printer, as an extrusion temperature of 350-380°C is required. In the case of 3D printers, it also requires a base temperature of 140-160 °C and a chamber temperature of up to 150 °C. For this reason, it is recommended to use industrial 3D printers, which meet all requirements. To ensure good adhesion to the printing base it is recommended to use Nano Polymer Adhesive, and thus avoid the warping effect.


During the printing of the desired parts with PEI 9085, internal stresses are generated, just as with any type of plastic, which can develop into unwanted cracks or deformations. Eliminating these stresses is very simple and only requires a hot air oven and the following 5 steps:

  1. Place the printed parts in a cold oven at room temperature.
  2. Set the temperature to 150°C and let it stabilise for 1 hour.
  3. After 1 hour at 150 ºC, increase the oven temperature to 200 ºC and let it stabilise for another 1 hour.
  4. After 1 hour at 200 °C, reduce the temperature back to 150 °C and leave to stabilise for 30 minutes.
  5. After 30 minutes, turn off the oven and allow the printed parts to return to room temperature inside the oven while it cools down.

This process must be carried out by qualified personnel.

General information
Material PEI 9085
Manufacturer 3DxTech
Format 1 Kg bag
Density 1.34 g/cm3
Colour Natural
Mechanical properties
Izod impact resistance (ASTM D256) -
Charpy impact resistance  -
Ultimate breaking strength -
Maximal deformation at break -
Tensile strength (ASTM D638) -
Tensile modulus (ISO 6721) -
Bending strength (ISO 178) -
Bending modulus  -
Surface hardness -
Thermal properties
Processing temperature -
Glass transition temperature 186º C
Melting temperature -
MFR Ratio -
Flammability (UL 94 @1.5 mm) V-0
Additional information
HS Code 3901.1

* The typical values listed in this table should be considered as a reference. We advise you to confirm the final results and properties with your own tests. For further information please refer to the product data sheet.


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