fire retardant yarn, fire resistant yarn, DTY 75/72 fire retardant yarn, fire resistant yarn, DTY 75/72:performance of the flame retrdent is outstanding and permanent, loi>32% Specification:DTY SD 75/74, 75/144, 150/48, 300/96(RAW WHITE OR DOPE-DYED)DTY FD 75/72, 150/144(RAW WHITE OR DOPE-DYED) fire retardant yarn