{"id":22,"date":"2015-02-05T10:50:55","date_gmt":"2015-02-05T15:50:55","guid":{"rendered":"http:\/\/ip-tx-www.eos.ncsu.edu\/tpacc\/?page_id=22"},"modified":"2022-08-30T16:03:57","modified_gmt":"2022-08-30T20:03:57","slug":"off-gassing","status":"publish","type":"page","link":"https:\/\/textiles.ncsu.edu\/tpacc\/heat-and-flame-protection\/off-gassing\/","title":{"rendered":"Off-Gassing"},"content":{"rendered":"\n
To gain an understanding of the harmful gasses released from a flame resistant clothing material during a simulated flash fire exposure, TPACC developed an off-gassing test method based on the Heat Transfer Performance (HTP) test, commonly known as the Thermal Protective Performance<\/a> (TPP). <\/p>\n\n\n\n The TPP device is utilized to expose material swatches to radiant heat and flame from 3-5 seconds. Modifications of the instrument system allow for the collection of hydrogen cyanide, hydrogen chloride and volatile organic off-gasses in an impinger with solvent. The acid gases are fully quantified. Organics are identified and a semi-quantitative estimate is made using GC\/MS analysis. <\/p>\n\n\n\n The amount of analyte measured in the solvent depends on fabric composition. This new method provides for analysis of off-gassing from fabrics during a more realistic simulation of a flash fire exposure.<\/p>\n\n\n\n