Pro-fax PF531



Pro-fax PF531 radiation resistant, high melt flow, controlled rheology polypropylene homopolymer is available in pellet form. This resin is typically used in injection molding applications and offers enhanced retention of physical properties and color after radiation sterilization.

Pro-fax PF531 resists yellowing and embrittlement after gamma radiation. However, since performance and appearance after radiation sterilization can be sensitive to design and processing choices, the users should verify performance in their application.

Our customers typically use this resin in radiation-sterilizable medical and laboratory devices.


North America


SDS - Safety Data Sheet
PSB - Product Stewardship Bulletin

Product Data and Technical Information

Typical Properties

Melt Flow Rate (230 °C/2.16 kg) 27 g/10 min
Density (23 °C) 0.90 g/cm³
Flexural Modulus (0.05 in/min, 1% Secant, Procedure A) 140000 psi
Flexural Modulus (1.3 mm/min, 1% Secant, Procedure A) 965 MPa
Tensile Strength at Yield (2 in/min) 4100 psi
Tensile Strength at Yield (50 mm/min) 28 MPa
Tensile Elongation at Yield 15 %
Notched Izod Impact Strength (73 °F, Method A) 0.6 ft-lb/in
Notched Izod Impact Strength (23 °C, Method A) 32 J/m
Deflection Temperature Under Load (66 psi, Unannealed) 185 °F
Deflection Temperature Under Load (0.45 MPa, Unannealed) 85 °C

Technical Data Sheet

Technical Data Sheet - ASTM


Injection Molding


Polypropylene, Homopolymer


Labware, Medical Devices