US Patent 10253437 Lightweight fabrics containing carbon-containing aramid fiber blend including modacrylic fiber

An article of thermal protective clothing suitable for use in arc protection comprising a woven fabric comprising yarns comprising modacrylic fiber and aramid fiber, wherein 25 to 100 parts of the aramid fiber contain 0.5 to 20 weight percent discrete homogeneously dispersed carbon particles and 0 to 75 parts of the aramid fiber are free of discrete carbon particles; the fabric having an ATPV of 10 cal/cm2 or greater at a basis weight of 6 ounces per square yard (203 grams per square meter) or less, and a total content of 0.1 to 3 weight percent discrete carbon particles.