1.100% polyester Yarn FDY 2.Used for wrap knitting, weft knitting,water jet loom 3.Semi Dull, Trilobal Bright,flat bright Polyester FDY is the abbreviation for Polyester Fully Drawn Yarn. It is also know as Polyester Filament Yarn (PFY) or Spin Draw Yarn (SDY). FDY is mainly used as weft or weaves in making fabrics. FDY can be knitted or woven with any other filament yarn to get fabric of various ...