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 PSU may be susceptible to stress cracking when they come into contact with polar organic solvents, such as ethyl alcohol.
  • Coolants containing soluble oil should be avoided during machining because they may cause environmental stress cracking
  • Pure water or compressed air are suitable cooling methods for PSU.
  • 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.