PSU (Plastic)

Basics

• An abbreviation for Polysulfone
• Other common forms are polyethersulfone (PES) and polyphenylene sulfone (PPSU)
• According to This Filament Source it has:

Very high thermal properties with a Tg of 187°C and HDT of 172°C [Superior to ULTEM™ 9085] Excellent hydrolytic resistance High Environmental Stress Crack Resistance (ESCR) Highly resistant to gamma radiation Sterilization suitable - including EtO gas, radiation, steam autoclaving, plasma, dry heat and cold sterilization Resists most common automotive fluids, including gasoline, antifreeze, transmission fluid, motor oil, power steering fluid, windshield washer fluid Excellent dimensional stability (low creep sensitivity and low, uniform coefficient of thermal expansion) and highly reproducible part-to-part dimensions

• It has a molar mass of 442.52 g/mol while lead's is 207.2 g/mol (which may explain it's radiation resistance along with it's chemical stability

Useful Links

• The Wikipedia Page on PSU Plastic