Polysulfone [PSU]

PSU is a slightly yellow, translucent (non-optical quality) amorphous thermoplastic that combines excellent mechanical, thermal, and electrical properties. It is frequently used as a replacement for polycarbonate when higher temperature resistance, improved chemical resistance, or autoclavability is required.

Grades

● Sultron® PSU Polysulfone

  • High maximum allowable service temperature in air [150 °C continuously]
  • Good hydrolysis resistance [suitable for repeated steam sterilization]
  • High strength and stiffness over a wide temperature range
  • Good dimensional stability
  • Physiologically inert [suitable for food contact per FDA regulations]
  • Very good resistance against high energy radiation [gamma- and X-rays]
  • Good electrical insulating and dielectric properties
  • Amorphous thermoplastics such as Sultron® PSU are susceptible to stress cracking when exposed to polar organic solvents (e.g., ethyl alcohol).
  • Environments that are harmless to unstressed parts may induce stress cracking in highly stressed components.
  • This behavior also applies to Duratron® U1000 PEI and, to a lesser extent, Sultron® PPSU.
  • PSU is widely used in food processing equipment such as milk machines, pumps, valves, filtration systems, plates, and heat exchangers as well as in analytical instruments and components subjected to repeated cleaning and sterilization.
  • Moreover, the raw materials used to manufacture Sultron® PSU stock shapes comply with U.S. FDA regulations for plastics intended for contact with food.