Filament · InnovatiQ TiQ8

PSU

Ensinger · Tecafil PSU natur

Polysulfone is a transparent high-performance thermoplastic that can be steam sterilised repeatedly. Its FDA and EU 10/2011 conformity makes it usable for food contact and medical technology.

Property profile

Temperature 4Chemicals 3Strength 3Toughness 4Dimensional 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 classPSU (polysulfone)Ensinger TDS
Density1.23 g/cm³Ensinger TDS
Tensile strength XY / XZ / ZX (ISO 527-2, 5 mm/min)74.9 / 76.3 / 78.3 MPaEnsinger TDS
Tensile modulus XY / XZ / ZX2,374 / 2,497 / 2,566 MPaEnsinger TDS
Elongation at break XY / XZ / ZX86.4 % / 6.9 % / 6.3 %Ensinger TDS
Glass transition temperature (ASTM D 3418)187 °CEnsinger TDS
HDT-A (ISO 75 Method A)177 °CEnsinger TDS
Service temperature short / long term180 °C / 160 °CEnsinger TDS
Thermal expansion (CLTE)5.3 · 10⁻⁵ /KEnsinger TDS
Moisture absorption (ISO 62)0.8 %Ensinger TDS
Nozzle temperature360 – 400 °CEnsinger TDS
Build chamber temperature160 – 190 °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 PSU natural 1.75 mm · retrieved 2026-09-21

Strengths

  • Repeatedly steam sterilisable without loss of properties
  • FDA and EU 10/2011 compliant, therefore suitable for food contact
  • Translucent – fill levels and internal spaces remain visible
  • High heat deflection temperature

Limitations

  • Sensitive to some solvents, ketones in particular
  • Prone to stress cracking with unfavourable design
  • High processing temperatures at nozzle and build chamber
  • Yellows under prolonged UV exposure

Typical applications

Produced on: InnovatiQ TiQ8 — More about this machine

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