The fire rating of chemical fibers
The limited oxgen index of polytetrafluoroethylene(PTFE) fiber is up to 95%.
The index of carbon fiber is 36% to 40%.
To polysulfonamide, the index is around 33%.
The limited oxgen index of aramid fiber is 26% to 30%.
The fire rating of natural fibers
The best fire resistant fiber is alginate fiber. Its LOI(limited oxgen index) is around 48%.
The second is wool with LOI up to 26%.
The third is silk which is about 24% in LOI.
Other fibers or fabrics can be finished with fire retardants to be fire resistant. Specification can be customized in our factory.