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ULTEM PEI material

What is ULTEM PEI material?


In the world of advanced materials, ULTEM PEI stands out as a versatile and high-performance thermoplastic that has found widespread use across various industries. From aerospace to medical devices, ULTEM PEI material has proven its worth due to its exceptional properties and capabilities. In this comprehensive guide, we will delve into the world of ULTEM PEI material, exploring its composition, properties, applications, and benefits.

Understanding ULTEM PEI Material

ULTEM PEI material, also known as polyetherimide, is a high-performance thermoplastic that is renowned for its exceptional combination of mechanical, thermal, and electrical properties. It falls under the category of engineering thermoplastics and is a part of the polyimide family. ULTEM stands for “Ultimate Performance.”

Composition and Molecular Structure

ULTEM PEI material is composed of repeating units known as monomers, which combine to form a high molecular weight polymer chain. Its molecular structure includes an amorphous aromatic backbone, which contributes to its remarkable properties.

Key Properties of ULTEM PEI Material

High Thermal Stability:

ULTEM PEI material exhibits exceptional thermal stability, making it suitable for applications that involve high temperatures. It has a glass transition temperature (Tg) of approximately 217°C (423°F), allowing it to maintain its mechanical properties even at elevated temperatures.

Mechanical Strength:

ULTEM PEI material boasts impressive mechanical strength and stiffness. It has a high tensile strength and can withstand significant loads without deformation or failure.

Chemical Resistance:

This material demonstrates resistance to a wide range of chemicals, including acids, bases, and solvents. This property makes it a preferred choice for applications exposed to aggressive environments.

Flame Retardancy:

ULTEM PEI material is inherently flame retardant, meeting stringent industry requirements for safety. It does not support combustion and emits minimal smoke.

Electrical Insulation:

With excellent electrical insulating properties, ULTEM PEI material is commonly used in applications where electrical conductivity must be minimized.

Dimensional Stability:

The material exhibits minimal dimensional changes even under varying temperature conditions, contributing to its reliability in precision applications.

Applications of ULTEM PEI Material

The remarkable combination of properties possessed by ULTEM PEI material makes it an ideal choice for a wide range of applications:

Aerospace and Aviation: 

ULTEM PEI material is used in aerospace components such as structural parts, interior components, and engine components due to its lightweight, high strength, and resistance to harsh conditions.

Medical Devices:

It finds applications in medical equipment like sterilization trays, surgical instruments, and diagnostic devices, thanks to its biocompatibility and resistance to repeated sterilization processes.

Automotive Industry: 

ULTEM PEI material is used for various automotive components, including lighting assemblies, electrical connectors, and interior trims, due to its thermal and chemical resistance.

Electronics and Electrical Components: 

Its electrical insulating properties make it suitable for components like connectors, sockets, and insulators in the electronics and electrical industries.

Industrial Applications: 

ULTEM PEI material is employed in industrial environments for manufacturing jigs, fixtures, and tooling due to its durability and resistance to wear.

Consumer Goods: 

It can be found in household appliances, sports equipment, and consumer electronics due to its aesthetic appeal and performance.

Benefits of ULTEM PEI Material

Design Flexibility: 

ULTEM PEI material can be injection molded, machined, and even 3D printed, offering designers the flexibility to create complex shapes and structures.

Reduced Weight:

Its high strength-to-weight ratio contributes to lightweight end products, particularly important in industries like aerospace and automotive.


ULTEM PEI material’s resistance to heat, chemicals, and wear ensures the longevity of components, reducing maintenance and replacement costs.

Safety and Compliance: 

Its flame retardancy and chemical resistance contribute to compliance with safety regulations and industry standards.


In medical applications, ULTEM PEI material’s biocompatibility is a crucial factor, ensuring patient safety.


In conclusion, ULTEM PEI material stands as a testament to the advancements in materials science, offering a unique combination of thermal, mechanical, and electrical properties. Its versatile nature has made it a staple in industries ranging from aerospace to medical devices, driving innovation and enhancing product performance. With its exceptional properties and a wide range of applications, ULTEM PEI material continues to shape the future of engineering materials. Whether it’s designing intricate components or ensuring safety in critical applications, ULTEM PEI material is truly a remarkable material with endless possibilities.


Is PEI the same as ULTEM?

No, PEI (polyetherimide) is a type of polymer, while ULTEM is a brand name for a specific PEI material developed by SABIC. ULTEM is a well-known high-performance variant of PEI.

What type of polymer is ULTEM?

ULTEM is a high-performance thermoplastic polymer known as polyetherimide (PEI). It belongs to the polyimide family and offers exceptional mechanical, thermal, and chemical properties for diverse industrial applications.

What are the different types of ULTEM material?

ULTEM material comes in various types, including ULTEM 1000, ULTEM 1010, ULTEM 2300, and ULTEM 9085. These variants offer different characteristics such as mechanical strength, thermal resistance, and flame retardancy for diverse applications.

What is ULTEM used for?

ULTEM is used for aerospace components, medical devices, automotive parts, electronics, and industrial applications. Its exceptional properties, including high thermal stability, mechanical strength, and chemical resistance, make it versatile across industries.

What is another name for ULTEM?

ULTEM is also known by its full name, polyetherimide (PEI).