Ultem (PEI – Polyetherimide) – High-Performance Engineering Plastic for Industrial and Engineering Applications

Ultem (PEI – Polyetherimide) is one of the world’s leading high-performance thermoplastics, thanks to its unique combination of exceptional mechanical strength, outstanding thermal resistance, superior electrical insulation, and excellent chemical durability.
These properties make Ultem the material of choice for critical applications that demand reliability under extreme conditions – including aerospace, defense, medical, and advanced electronics.

At Wirtheim, we supply Ultem sheets and rods in a wide range of diameters, thicknesses, and sizes – with precision machining and custom solutions available upon request.

Key Advantages:

• High thermal resistance – continuous use up to 200°C

• Exceptional mechanical strength and dimensional stability

• Chemical resistance against solvents, oils, and fuels

• Outstanding electrical insulation – ideal for electronic and electrical components

• Semi-transparent amber color – suitable for design and optical applications

Our Products:

✔ Ultem Rods – available in multiple diameters, perfect for precision machining
✔ Ultem Sheets – wide range of thicknesses for industrial and engineering use
✔ Custom Solutions – cutting, turning, milling, and CNC machining to customer specifications

Main Applications:

• Aerospace & Defense – components requiring strength and heat resistance

• Medical Industry – sterilizable instruments and durable parts

• Electronics – reliable insulation and structural components

• Industrial Engineering – precision-machined, high-performance components