- Author
- Freeston, W. D., Jr. | Coskren, R. J. | Skelton, J. | Sebring, R. E.
- Title
- Flammability and Heat Transfer Characteristics of PBI Fabric. Technical Report. July 1968-March 1970.
- Coporate
- Air Force Materials Lab., Wright-Patterson AFB, OH
- Report
- AFML-TR-70-267, January 1971, 82 p.
- Keywords
- PBI (fabrics) | flammability | heat transfer | ignition temperature | burning rate | mannequins | coveralls | JP-4 jet fuel | fabrics | polybenzimidazole
- Abstract
- The ignition temperatures and burning rates in air of similar PBI, Nomex and flame-retardant-treated cotton fabrics are given. The thermal shrinkage of PBI and Nomex fabric are compared and a process for minimizing PBI shrinkage outlined. The thermal conductivity os a series of fabrics at ambient and elevated temperatures is given. The temperature rise in a fabric-covered skin simulant under flame impingement is investigated for a range of fabric constructions. The flame-impingement heat-transfer experimental data are compared with theoretically predicted results. A parametric study of the material properties which govern heat transfer through a fabric under flame impingement is presented. The results indicate that one type of fibrous structure which will provide improved thermal protection is moderate weight, tightly woven PBI fabric over a PBI tricot mesh.