PI or known as Vespel is an exceptional value for applications where thermal requirements exclude PAI and do not require the extraordinary thermal resistance of Celazole PBI. PI is available in several grades for structural and wear applications and in the broadest range of shapes – particularly thick sheets, larger sheets geometries and heavy-wall tubes. It offers good mechanical performance for applications that demand higher temperature resistance.
Fixtures and handling parts for glass and plastics manufacturing, hot runner nozzle thermal insulator bushings, metal replacement for aerospace components – lightweight, lubrication free, structural and wear parts for semiconductor and electronics manufacturing, thermal standoffs in glass manufacturing.
Characteristics:
Non-melting high-temperature polyimide
High strength, modulus and rigidity, also in the high temperature range
High compressive strength and creep resistance
High purity, low outgassing in vacuum conditions
Good chemical resistance
Good thermal and electrical insulation
High radiation resistance
Inherently flame resistant
High density
Hydrolysis sensitivity to hot water >100 °C and superheated steam