Evaluating Thermal Protective Performance Testing

摘要: Even as better materials are developed for protective clothing, NFPA data indicate the number of burn related fire fighter deaths and severe injuries is increasing. These unexpected most part. As a result, questions arise about Thermal Protective Performance (TPP) ratings whether performance changes due to use or effects aging. part NIST-sponsored Small Business Innovative Research project, current TPP test techniques were evaluated. Some extensions suggested. In tests, dry fabric samples ensembles exposed heat flux 83 kW/m2 with nominally 50% radiative convective transfer. Heat transmission through sample measured copper calorimeter. The Rating time in seconds required 2nd degree burn. Current problems include: 1) methods overestimate 2) No information provided on maximum potential damage. 3) transfer properties. 4) how use. Suggested Change source — modified radiant technique. Replace calorimeter thermal skin simulant sensor. Estimate damage using two step analysis method. Obtain both damp properties modeling clothing performance.