Outstanding properties
- High purity
- Non-meltable
- Dimensionally stable at elevated temperatures
- Machinable into finished parts
- Excellent plasma resistance
Thermal stability
TECAPOWDER PI can be used in critical etching processes where chamber temperatures are high. The long term thermal stability of TECAPOWDER PI is excellent. Its flex strength of high especially at elevated temperatures. A high percentage of its room temperature flexural strength is maintained even at elevated temperatures. Since the glass transition temperature is very high, the dimensional stability up to its Tg is very good. TECAPOWDER PI is a non-meltable polymer, therefore, it has excellent creep under load at high exposure temperatures.
Chemical resistance
The fully imidised nature of TECAPOWDER PI yields excellent chemical resistance to various solvents, acids, and hydraulic fluids. Polyimide powder is produced using novel isocyanate technology which yields a unique, fully imidised material without the need for curing. Other polyimides must be molded and cured. The curing closes the imide rings and produces water as a by-product that migrates out through the surface. Fabricated parts made from TECAPOWDER PI are non-porous, which minimises the migration of fluids into the surface layers and greatly improves chemical resistance.