... 6 FDY, Catonic FDY, polyester FDY 20D--600D SD, TBR,black color 2. 30/24, 40/12, 40/34, 90/36, 3 ... .The dope dyed black yarn is FDY and DTY yarn from 50D to 600D.The fire retardant yarn, bamboo charcoal, Doris yarn, hygroscopic & quick dry ... -83227588Mobile: 0086-13928423297 nylon 6 FDY, Cationic FDY, polyester FDY yarn, 20D--600D, SD,TBR,black color yarn