Is PEI the Same as Ultem?

PEI (Polyetherimide) and Ultem are closely related, but they are not exactly the same. Ultem is actually a brand name for a specific grade of PEI resin produced by Sabic, a leading global chemicals manufacturer. However, in common usage, “Ultem” is often used as a synonym for PEI, due to the popularity of this particular resin brand.

Understanding PEI (Polyetherimide)

PEI is a high-performance thermoplastic known for its excellent mechanical properties, thermal stability, and resistance to chemicals. It is a versatile material used in demanding applications that require durability and strength, such as in the aerospace, automotive, medical, and electronics industries.

PEI is a transparent, amber-colored polymer, and it can be processed using common plastic molding techniques. It maintains its properties across a wide range of temperatures, making it ideal for applications that require high heat resistance, up to 170°C (338°F), and high mechanical strength.

Ultem – A High-Quality Grade of PEI

Ultem, as mentioned, is a trademarked name for a specific grade of PEI resin. Sabic’s Ultem resin is renowned for its consistency, high quality, and reliability. It offers the same core properties as PEI, but its formulation and processing may be optimized to meet the specific needs of industries that require high-performance materials.

Conclusion

While PEI and Ultem refer to the same base material, Ultem is a brand name for a specific type of PEI produced by Sabic. Both materials offer exceptional performance in high-temperature, high-stress environments.