Resinex website uses cookies and similar technologies to better understand which products are of your interest so we can personally provide you with more detailed information. By using Resinex website you agree to our use of cookies. Learn more about cookies and how to manage them

PEI Ultem® - A Resin that Takes the Heat

Producer: Sabic IP
Polymer type PEI

The Ultem® Resin family of amorphous thermoplastic polyetherimide (PEI) resins offers outstanding elevated thermal resistance, high strength and stiffness, and broad chemical resistance.

General info

Ultem® is available in transparent and opaque custom colours, as well as glass filled grades. Plus, Ultem® copolymers are available for even higher heat, chemical and elasticity needs. Ultem® resins uniquely balance mechanical properties and processability, offering design engineers exceptional flexibility and freedom.

Typical applications of Ultem® Resins, Aerospace parts, fire safety helmets and equipment, medical components including those that need autoclaving, food industry equipment.


Long-term Heat Resistance of Ultem®

Ultem® exhibits excellent stability of physical and mechanical properties at elevated temperatures thanks to high glass transition temperature of 217 °C. Ultem® is available with relative thermal indices (RTI) up to 180 °C

Strength and Stiffness of Ultem®

Ultem® has outstanding strength and amorphous thermoplastic among the available alternatives, with predictable stiffness and strength up to 200 °C. Ultem® unfilled, transparent grades are equal in strength to other thermoplastics with opacifying fillers.

Dimensional Stability of Ultem®

Ultem® is among the most dimensionally stable thermoplastics available, offering predictability over a wide temperature range. Filled grades of Ultem® offer exceptionally high-tolerance dimensional capabilities.

Environmental Stress & Cracking Resistance of Ultem®

Unlike most other amorphous thermoplastics, Ultem® resins retain strength and resist stress cracking when exposed to automotive and aircraft fluids, aliphatic hydrocarbons, alcohols, acids, and weak aqueous solutions

Flammability, Smoke Generation and Toxicity of Ultem®

Ultem® is inherently flame resistance without additives in most grades - exceptionally difficult to ignite, with a limiting oxygen index (LOI) of 47%, meeting UL94 V0 specifications in sections as thin as 0.41 mm. Ultem® generates extremely low smoke per the NBS smoke evolution test, with products of combustion no more toxic than those of wood.

Processability of Ultem®

Ultem® can be extruded, thermoformed, extrusion blow moulded and injection moulded, and flowability permits long flow lengths down to 0.2mm thick using conventional injection moulding equipment


Loading, please wait

Contact form