Conductive and Compressive Heat Resistance

Evaluate the potential for skin injury from textile conductive properties under compression.

Thermal conduction testing for protective fabrics

The Conductive and Compressive Heat Resistance (CCHR) device is a protective clothing test system designed by Thermetrics to evaluate the energy that is absorbed by materials that are exposed to heated surfaces. When compressed against the skin these garments can transmit enough thermal energy to cause serious burn injuries. Measuring the amount of energy transferred by a protective fabric via thermal conduction to the wearer requires specific exposure conditions and complex analysis—parameters that the CCHR device was developed to isolate, reproduce, and quantify as per ASTM F1060.

Precise temperature uniformity and real-time data

The CCHR device features a durable stainless-steel hotplate with an electronics-grade copper test surface for precise temperature uniformity. The protective clothing test device system includes specimen holders, removable calorimeter sensor assembly, a pneumatically actuated transfer tray and integrated compression system. Its precisely weighted copper calorimeter sensor has been optimized to match human skin response. All CCHR systems come with laptop PC and ThermDAC Burn Model software, which processes sensor data and calculates the degree of predicted burn injury.

CCHR’s docs and resources

CCHR’s tech specs

  • Durable 8”x 8” stainless steel heat source is adjustable for temperatures up to 371°C with an accuracy of ±1.5°C. Higher temperature capabilities are available.
  • Computer controlled pneumatics apply a compressive force ranging between 0.5 to 8.0 psi. Pressure applied to the 6”x6” specimen is monitored in real time through the use of a precision load cell.
  • CCHR system provides automatic EPC calculation, plus “Time to Pain” and “Time to Second Degree Burn” results.
  • For more technical information, view the product spec sheet.

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