Polybenzimidazole [PBI]
Advanced Engineering Plastics 425°C
- Extremely high maximum allowable service temperature in air [310 °C continuously, up to 500 °C for short periods of time]
- Excellent retention of mechanical strength, stiffness and creep resistance over a wide temperature range
- Excellent wear and frictional behavior
- Extremely low coefficient of linear thermal expansion
- Excellent resistance against high energy radiation [gamma- and X-rays]
- Inherent low flammability
- High purity in terms of ionic contamination
- Good electrical insulating and dielectric properties
- High-tolerance fabricated components should be stored in sealed containers, typically polybags with desiccant, to prevent dimensional changes caused by moisture absorption.
- Components that are rapidly exposed to temperatures above 200 °C should be pre-dried or maintained in a dry state to avoid deformation due to thermal shock.
- It is commonly used to replace metals and ceramics in applications such as pump components.
- Valve seats (including high-tech valves)
- Bearings
- rollers