- 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
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ignition temperature
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burning rate
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mannequins
|
coveralls
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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.