FDY, Fully Drawn Yarn (hu ua tag nrho cov xov paj hauv Taiwan), qhia txog kev ncab ntawm cov txheej txheem spinning, thiab tuaj yeem tau txais cov xov paj winding nrog kev taw qhia siab thiab nruab nrab crystallinity, uas yog tag nrho cov xov paj. Cov pa tag nrho cov xov paj nrog polyester thiab nylon belongs rau tshuaj fiber ntau filament. FDY fabrics yog du thiab mos rau qhov kov, thiab feem ntau siv los xaws cov ntaub lo lo ntxhuav. Nws muaj ntau yam kev siv hauv khaub ncaws thiab tsev textiles.