Why is PBI used in turnout gear?

Why is PBI used in turnout gear?

• A. It is inexpensive
• B. It is a synthetic fiber with a very high decomposition temperature.
• C. It is more comfortable
• D. It is water resistant

Answer: (B)

PBI is used in turnout gear because it has a very high decomposition temperature and exceptional thermal stability. In firefighting, gear must withstand extreme heat and direct flame without breaking down or melting. PBI fibers resist pyrolysis and keep their structural integrity much longer under heat, which helps limit heat transfer to the skin and prevents the material from degrading during exposure. That thermo-oxidative stability is the main reason it's chosen for protective layers, even though cost, comfort, or water resistance are considerations in fabric design. Often it’s used in blends with other fibers to balance protection with strength and flexibility.

PBI is used in turnout gear because it has a very high decomposition temperature and exceptional thermal stability. In firefighting, gear must withstand extreme heat and direct flame without breaking down or melting. PBI fibers resist pyrolysis and keep their structural integrity much longer under heat, which helps limit heat transfer to the skin and prevents the material from degrading during exposure. That thermo-oxidative stability is the main reason it's chosen for protective layers, even though cost, comfort, or water resistance are considerations in fabric design. Often it’s used in blends with other fibers to balance protection with strength and flexibility.