Polyetherimide (PEI) Plastic Injection Molding

OEM injection modling for polyetherimide

Retlaw Industries manufactures high-quality Polyetherimide (PEI) plastic parts and components for businesses across various industries. Polyetherimide (PEI), also known as Ultem™, is a thermoplastic material used in a variety of everyday applications such as lighting systems, automotive parts, medical components, and more. PEI is a high-strength material with excellent chemical resistance and ductile properties suitable for a wide range of applications.

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What is Polyetherimide (PEI) Plastic?

Polyetherimide (PEI) is an amorphous thermoplastic with amber transparency, characterized by a unique combination of exceptional specific and dimensional strength, rigidity, flexibility, and inherent flame resistance. General Electric’s plastics division first developed Polyetherimide (PEI) in the 1980s and branded it as Ultem™, a trade name still used to this day.

Why is Polyetherimide (PEI) So Commonly Used?

Polyetherimide (PEI) is commonly used in high-performance applications as well as everyday applications. PEI is a popular thermoplastic material across industries due to its lightweight, electrically conductive properties, thermal resistance, and mechanical strength. Ideal for the manufacturing of plastic injection molded parts where tight tolerances and low warp are critical to performance.

Polyetherimide (PEI) Material Characteristics

Polyetherimide Plastic Injection Molding Service

Considered an easy thermoplastic material to process, Polyetherimide (PEI) belongs to the polyimide family of ultra-high-performance polymers. Some of the benefits of polyetherimide plastic include:

  • Heat resistance
  • Stiffness
  • Stability
  • Environmental resistance
  • Low smoke production
  • Low flammability
  • Can be sterilized

If you think polyetherimide plastic could be the right material for your manufactured parts, contact Retlaw Industries today to get a quote for your company.

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Polyetherimide Plastic Specifications (At Room Temperature)

Name Polyetherimide
Chemical Formula (C37H24O6N2)n
Melting Point (°C) ~225°C 
Tensile Strength ~17000 psi
Impact Strength ~0.5 ft-lb/in notched Izod 
Hardness Level (Rockwell) R125
Flexural Modulus ~20000 psi 

Common Applications for Polyetherimide (PEI) include:

Since the 1980s, corporations like GE have used Ultem™ in many different plastic applications, and today, polyetherimide is one of the most common plastics used for industrial and manufacturing purposes. Some common applications for polyetherimide, or Ultem™, include:

Medical Components

PEI Plastic for Medical Components

Chemistry Tools

PEI Plastic for Chemistry Tools

Auto Transmission Parts

PEI Plastic for Auto Transmission Parts

Lamp Sockets

PEI Plastic for Lamp Sockets

Lighting Systems

PEI Plastic for Lighting Systems


PEI Plastic for Thermostats

Why Choose Retlaw for Polyetherimide Injection Molding?

Choose Retlaw Industries and benefit from our transparent pricing, extensive material processing capabilities, and commitment to excellence. With over 40 years of industry experience and a long track record of success, we are the trusted choice for businesses that demand nothing but the best. Contact us today to get started!

Plastic Injection Molding Services

Design & Engineering: Customized design and engineering for versatile polyetherimide plastic applications.

Tooling: Precise tooling for efficient polyetherimide plastic molding.

Molding: High-quality molding for consistent polyetherimide plastic products.

Assembly: Seamless assembly of complex polyetherimide plastic components.

Prototyping: Rapid prototyping to refine polyetherimide plastic designs quickly.

Creating Custom Plastic Parts in Over 10 Industries

Polyetherimide Plastics Manufacturing In The U.S.

Retlaw Industries supplies polyetherimide plastic products to businesses in Colorado, Illinois, Indiana, Michigan, Minnesota, New York, Ohio, Pennsylvania, Washington, Wisconsin, and beyond. Polyetherimide has high heat resistance, stiffness, stability, environmental resilience, low smoke production, and low flammability. Contact Retlaw Industries to find out more about advanced polyetherimide plastics!

Contact the polyetherimide plastic injection molders at Retlaw today to get a product quote. 
Retlaw sells in all 50 states. Let's get together and build a solution.
For over 40 years, Retlaw has produced quality injection molding tools which has led us into thermoplastic injection molding for a wide variety of industries. With over 19 injection molding machines, decades of collective experience, and over 50,000 square feet under roof and room to expand, we are always ready for your new projects.
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