Why use Ultem® in your Applications

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Ultem PEI Polyethermide thermoplastic component

Ultem PEI Polyetherimide thermoplastic component

Ultem Polyetherimide is a material widely used in the aerospace industry.  It is a material with high thermal resistance, high dielectric strength and excellent durability.  Since it has a high thermal resistance rating, components have the benefit of evading radar detection. It is often used in military aircraft components for weight reduction in place of metal parts.

High performance thermoplastic materials such as Ultem are in increasing demand in industrial manufacturing applications.  As a lightweight alternative to metal, it is increasingly being utilized in automotive, medical and semiconductor applications.

Ultem is now widely used in:



  • Medical instrument components
  • Medical devices
  • Manifolds
  • Electro-hydraulic control valves
  • Semiconductor components

Ultem has exceptional heat resistance, performing continuously to 340° F.  It is hydrolysis resistant, extremely resistant to acidic solutions, and can easily tolerate repeated sterilizations for reusable devices.  It is also used in semiconductor components because of its arc resistance, and is well suited for applications that require deposition, removal, patterning, and modification of electrical properties.

At Performance Plastics, we are experts in injection molding, specializing in high performance plastics. Ultem® is an amorphous material, which can cause complications during the injection molding process. A specific set of conditions, equipment, and processing procedures must be followed to effectively injection mold Ultem®. Our proprietary tool design software, processes and equipment enable us to injection mold components having complex geometries made from challenging ultra, high-performance thermoplastic materials, and reinforced compounds.

Ultem® is one of the many high-performance polymers in which Performance Plastics specializes.  For more information on Performance Plastic’s capabilities, please contact Rich Reed, Vice President of Sales and Marketing at 513.321.8404 or email at [email protected]