PEI

PEI are known for very high tensile strength, excellent thermal properties, and a broad range of chemical resistance. PEI is used in a variety of industries but is especially prominent in the IVD and medical diagnostic fields. Surgical tools, trays, handles, and test trials are all manufactured from this material due its ability to be cleaned for repeated use. Medical applications requiring resistance to steam autoclave, hot air, ethylene oxide, gamma radiation, and cold chemical sterilization utilize this material.

PEI is the material of choice in manifolds where higher heat resistance, chemical resistance, and dimensional stability are required beyond cast acrylic abilities.

The basic characteristics and key features of Polyetherimide are already discussed. Apart from them, there are various other properties that need to be considered before choosing a particular thermoplastic for a required end-use application.

High permanent operating temperature (170°C)

High mechanical strength

Extremely strong and stiff

High rigidity

High creep resistance over a wide temperature range

Easy to machine and fabricate

High dimensional stability

Very good resistance to hydrolysis (suitable for repetitive steam sterilisation)

Good electrical insulation

Good radiation resistance

High dielectric strength

Good chemical resistance to chlorine and caustic/acidic cleaning agents

Resistant to hydrolysis when exposed to hot water and steam

PEI is widely use for

Medical instrument components

Scientific equipment parts

Manifolds

Electrical connectors

Electrical insulation parts

Semiconductor equipment components

Chip test sockets