... a small amount of nylon staple fibers. monofilament Nylon filament yarn is mainly used for manufacture of powerful, producing socks, ... 30D/1F, 40D/1F, 250D/12F, 16F ,400-600D / 16F, 70D/24F, 40D/36F various specifications FDY, HOY nylon filament ... and various specifications nylon filament and filament twisting business, may come to sample production ...