Filament · InnovatiQ TiQ8

PEI 9085

Ensinger · Tecafil PEI 9085 natur

Polyetherimide, better known under the trade name ULTEM 9085. The material is firmly established in aerospace because it meets the FAR 25.853 fire requirements while offering a very favourable strength-to-weight ratio.

Property profile

Temperature 4Chemicals 4Strength 3Toughness 3Dimensional stability 4Printability 3

Rated 1 to 5 relative to the other materials in our range. This is an experience-based orientation aid, not a measured value – the hard numbers are in the table below.

Technical data

PropertyValueSource
Material classPEI (polyetherimide), based on Sabic Ultem 9085Ensinger TDS
Density1.34 g/cm³Ensinger TDS
Tensile strength XY (ISO 527-2, 5 mm/min)83.7 MPaEnsinger TDS
Tensile strength XZ88.1 MPaEnsinger TDS
Tensile strength ZX49.3 MPaEnsinger TDS
Tensile modulus XY / XZ / ZX2,512 / 2,568 / 2,452 MPaEnsinger TDS
Elongation at break XY / XZ / ZX9.7 % / 20.8 % / 2.6 %Ensinger TDS
Glass transition temperature (ASTM D 3418)180 °CEnsinger TDS
HDT-A (ISO 75 Method A)153 °CEnsinger TDS
Service temperature short / long term170 °C / 150 °CEnsinger TDS
Moisture absorption (ISO 62)0.39 %Ensinger TDS
Fire behaviour (UL 94, 1.5 mm)V-0Ensinger TDS
Fire behaviour, aerospacetested to FAR 25.853Ensinger TDS
Nozzle temperature360 – 390 °CEnsinger TDS

The manufacturer determined these values on printed specimens rather than injection-moulded ones, which makes them considerably more meaningful than typical datasheet figures. Note the orientations given: values in the layer plane (X, or XY and XZ) are considerably higher than those across the layers (Z, or ZX). Part orientation has to match the load direction – we are happy to advise.

“Qualified for functional parts” is a general classification. A functional part can be a simple clip or a main load-bearing member – the forces and load cases differ fundamentally. We therefore always assess in each individual case whether a material is suitable for your part.

Source: Ensinger GmbH, TECAFIL PEI 9085 natural 1.75 mm · retrieved 2026-09-21

Strengths

  • Meets FAR 25.853 and UL 94 V-0 – approved for aircraft interiors
  • Very high heat deflection temperature
  • Good strength-to-weight ratio
  • Considerably tougher than PEEK CF30, so more broadly usable
  • Cheaper than PEEK at a similar requirement profile

Limitations

  • Sensitive to certain solvents such as chlorinated hydrocarbons
  • High processing temperatures at nozzle and build chamber
  • Prone to stress cracking if notches are badly placed
  • More expensive than standard engineering plastics

Typical applications

Produced on: InnovatiQ TiQ8 — More about this machine

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