The Thermal Protective Performance device (TPP) was developed to measure the time elapsed for convective and radiant heat to penetrate through a protective composite fabric system - resulting in a burn injury to human skin. Test results are automatically compared to the Empirical Performance Curve (also known the Stoll Curve), which predicts a second degree burn to human skin as a function of heat and time. The point of intersection between sensor data and the Empirical Performance Curve provides the composite fabric’s TPP rating.
Also known as a Heat Transfer Performance Device (HTP), the Thermetrics TPP features a heat source consisting of two propane burners and a 9-bulb quartz infrared heat lamp assembly. The system is automated by using a pneumatically actuated sample carriage, water-cooled shutter, and mass flow controller, with three thermocouple input channels and an integrated sensor cooling stand for improved testing throughput. All TPP/HTP Test devices come with come with laptop PC and ThermDAC Burn Model software, which processes sensor data and calculates the degree of predicted burn injury.