Ultem® / PEI (polyetherimide) is a high-strength amorphous polymer with excellent heat and flame resistance (carrying a flammability rating of 94-V-0) with little smoke output. It performs continuously to 340° F, making it superior to commodity plastics such as Nylon and Delrin®.
PTFE was originally developed for use in aerospace applications but soon found a home in countless industrial applications. PTFE‘s unique characteristics include: chemical inertness (very few chemicals can attack it), extremely low coefficient of friction (nothing can stick to the material with any strength), high heat resistance (capable of service temperatures of 500° F) and extremely useful in cold temperature environments.
Ultem® / PEI (polyetherimide) is a high-strength amorphous polymer with excellent heat and flame resistance (carrying a flammability rating of 94-V-0) with little smoke output. It performs continuously to 340° F, making it superior to commodity plastics such as Nylon and Delrin®. Ultem® is an ideal solution for applications that require high strength and the ability to withstand high temperatures. The product also suits applications that require consistent dielectric properties over a wide range of frequencies. Ultem® is hydrolysis resistant and highly resistant to acidic solutions and is able to tolerate repeated autoclaving cycles, such as with repeated steam sterilization of reusable medical devices. Ultem® is widely used in electronics because of its good arc resistance and dielectric constant. Other typical applications include analytical instrumentation and structural components that require high strength and rigidity at elevated temperatures.
Comparison of polymer PTFE/FEP and Ultem® / PEI (polyetherimide) Property Values
Material Applications
polymer PTFE/FEP: Cabling solutions;Non lubricated bearings;O-rings;Seals;Capacitors;Semiconductor manufacturing;High temperature electrical parts;Gaskets;Valve components.
Ultem® / PEI (polyetherimide) 
efense & aerospace conductors;Connectors;Seals;Pumps & valves.
Material Properties
polymer PTFE/FEP: Excellent dielectric properties;Inertness to most chemicals;High heat and chemical resistance;Very low coeffiecient of friction;Excellent radiation resistance;Zero moisture absorption;Relatively insensitive to power frequency;Machinability.
Ultem® / PEI (polyetherimide) :Extremely strong and stiff;FDA compliant grades available;High chemical resistance;High dielectric strength.
Post time: Nov-05-2017