Injection Molding Resin: Ultem

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Ultem is a family of polyetherimide (PEI) thermoplastic materials manufactured by SABIC. Like all PEI materials, Ultem is similar to PEEK, but with lower impact strength and a lower useable temperature. However, Ultem is a less expensive option than PEEK.

Properties of Ultem

  • Long-Term Heat Resistance: Ultem maintains its physical and mechanical properties at elevated temperatures. Its glass transition temperature is 217°C (423°F).
  • Strength & Stiffness: Exhibits greater strength than most other thermoplastics, and reliably maintains its strength and stiffness up to 200°C (392°F).
  • Dimensional Stability: Ultem is one of the most dimensionally stable thermoplastics, predictable and reliable over an extremely broad temperature range.
  • Resistance to Environmental Stress & Cracking: Even when exposed to alcohols, acids, solvents, aliphatic hydrocarbons, and automotive and aircraft fluids, Ultem retains its strength and resists cracking.
  • Flammability, Smoke Generation & Toxicity: Ultem exhibits inherent flame resistance and is extremely difficult to ignite. When it does burn, it generates exceptionally low smoke that is no more toxic than wood smoke.

Is Ultem Right for Your Project?

Despite its strength, stiffness, and heat resistance, Ultem is fairly easy to process. It is a very versatile material that is a good fit for a wide range of applications. The team at Stack Plastics has extensive experience in injection molding Ultem, and can help you decide if this unique material is the best choice for your unique needs.

Contact Stack Plastics

For more information on Ultem materials or to get started on your injection molding project, contact Stack Plastics today.