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Ultem is High-performance plastic polymers that fall into two categories: thermosets and thermoplastics. Thermosetting polymers are those that solidify to an irreversible hardness after curing due to chemical bonds within the plastic. The polymer hardens in a cross-linked pattern that prevents it from re-melting, even under extreme heat.

ULTEM, the branded name for polyetherimide (PEI), is one of the few commercially available amorphous thermoplastic resins that retains its mechanical integrity at high temperatures.

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Features and applications

  • High Dimensional accuracy
  • High Material costs
  • Very high Strength
  • Low Flexibility

[Print Size]
406x355x406 MM

ULTEM is easy to thermoform and can be manufactured using fused deposition modeling (FDM). A heated nozzle repeatedly follows a set toolpath and emits one layer of the material at a time until the product is fully formed. Injection modeling is another quick and cost-effective option for manufacturing with ULTEM. Thermoplastic pellets are fed into the injection molding screw, melted and injected into the mold, cooled and hardened, and then the completed part is pushed out via the ejector pin. This process is ideal for producing uniform parts in high quantities, such as burn-in sockets.

[Print Effect]
Standard: Support structures are removed and some light sanding is performed at the support locations. FDM parts will generally show clear layer lines known as stepping. If a smooth surface finish is required right off the machine, then they should consider other 3D printing technologies.
Custom: Custom surface finishes like painting and additional sanding can be requested.


Chemical resistance


Visible layer
Low accuracy
Low detail performance

Industry application recommendation

Electrical applications
Food production
Medical Industry

Material parameters

Download ULTEM Datasheet Here



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