PEI (Polyetherimide) Injection Molding

PEI Injection Molding Services

PEI (Polyetherimide) Injection Molding

When making plastic components, polyetherimide is used as the basic material in the PEI injection molding method. It entails melting PEI resin, injecting it into a mold, letting it cool and harden, and then ejecting the created part. For demanding applications, NDDMold PEI injection molding is preferred due to its high strength, rigidity, heat resistance, and dimensional stability.

When you work with us for your PEI Injection Molding requirements, you open up new avenues for your products. Our state-of-the-art facilities, together with our skilled engineering staff, ensure the highest quality, prompt delivery, and affordable solutions.

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Why Choose NDDMold PEI Injection Molding?

Mechanical Strength
Mechanical Strength
Dimensional Stability
Dimensional Stability
Electrical Properties
Electrical Properties
Good Dimensional Accuracy
Good Dimensional Accuracy
Ease of Processing
Ease of Processing
Low Moisture Absorption
Low Moisture Absorption
High-temperature Resistance
High-temperature Resistance

Features of PEI Injection Molding

Strength and Robustness

High tensile strength, stiffness, and resistance to creep and fatigue are just a few of PEI’s remarkable mechanical attributes.

Resistance to Heat

Our PEI Injection Molding has exceptional thermal stability with a glass transition temperature (Tg) of about 217°C (423°F), making it the perfect choice for industries where exposure to heat and thermal cycling is a persistent concern.

Chemical Defense

With regard to a variety of substances, including acids, alkalis, solvents, and even automotive fluids, PEI demonstrates outstanding resilience. 

Complex and Accurate Geometries

Our cutting-edge injection molding procedure enables the precise fabrication of complicated shapes and complex geometry. 


Due to its versatility, PEI Injection Molding is a top choice for high-performance, across a variety of sectors.

Name Polyetherimide
Molecular Formula (C37H24O6N2)n
(°C) Melting Point ~225°C 
Strength in Tension ~17000 psi
Strength of Impact ~0.5 ft-lb/in notched Izod 
Level of Hardness (Rockwell) R125
Stretching Modulus ~20000 psi
Optimization of the Part Design

Given its superior dimensional stability and creep resistance, NDDMold PEI is appropriate for complex part designs. Optimizing wall thickness, rib design, gating systems, and incorporating draft angles are just a few instances of custom choices that may be available.

Choice of Injection Molding Equipment

PEI’s high melting point may necessitate the use of specialist injection molding equipment with powerful heating and cooling systems. Choosing a machine with accurate temperature, pressure, and injection speed control is one of the custom possibilities.

Spacecraft Parts

PEI can be used to produce aircraft components like connectors, brackets, interior cabin pieces, and electrical housings because of its great rigidity, strength, resistance to chemicals and heat.

Electrical and Electronic Parts

Electrical connectors, switches, relays, sockets, and other electronic components can be produced using PEI because of its superior electrical insulating qualities and resistance to high temperatures.

Vehicle Components

PEI is perfect for injection molding car parts such as connectors, brackets, sensor housings, and ignition system components because of its exceptional dimensional stability, resistance to vehicle fluids, and ability to maintain mechanical properties at high temperatures.

Healthcare Equipment

PEI is a fantastic option for medical device applications because of its strong sterilization resistance, biocompatibility, and resistance to chemicals and body fluids. 

Industrial Components

Manufacturing parts for diverse industrial equipment is made possible by PEI’s combination of mechanical strength, heat resistance, and chemical resistance. 

Commercial Goods

PEI is an excellent material for injection molding consumer goods because to its aesthetic appeal, chemical resistance, and endurance under heavy use. It is used to make a variety of items, including handles, electrical device housings, protective casings, and kitchenware.

Optical and Lighting

For injection molding optical components such as lenses, light guides, light diffusers, and LED encapsulation, PEI is a good choice due to its high light transmission, dimensional stability, and resistance to UV radiation.

Machinery Parts

PEI is ideal for making a variety of mechanical parts, including gears, bearings, cams, and structural elements due to its strength.

One Stop Plastic Injection Molding Expert

We are your one-stop plastic injection molding services provider that offers cost-effective solutions and high-quality plastic components.
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