FDY, umsonto ozotywe ngokupheleleyo, umsonto ozotywe ngokupheleleyo. Umsonto ojikelezayo kunye ne-orientation ephezulu kunye ne-crystallinity ephakathi inokufumaneka ngokuzisa umphumo wokwelula kwinkqubo yokujikeleza, eyintambo epheleleyo. Ngokwesiqhelo Polyester kunye nesilika eyoluleyo enayiloni, ziikhemikhali zefilament. Amalaphu e-FDY anemvakalelo egudileyo, ethambileyo kwaye adla ngokusetyenziswa ukwenza amalaphu esilika. Isetyenziswa kakhulu kwimpahla kunye nempahla yasekhaya.

I-FDY isetyenziswa kakhulu kwisilika nakwamanye amalaphu, ivakale igudile kwaye ithambile, isilika ye-DTY low elastic kunye ne-DTY network silk zihlala zisetyenziswa kumalaphu ezemidlalo. I-FDY isetyenziswa ikakhulu kwishishini lempahla kunye nelaphu; I-DTY yimathiriyeli ekrwada efanelekileyo yokunitha (i-weft knitting, i-warp knitting) okanye ukuluka koomatshini. Ifanelekile ukuveliswa kweempahla zempahla (ezifana neesuti, iihempe), iindawo zokulala (ezifana ne-quilt, i-bedspread, i-mosquito net) kunye nezinto zokuhombisa (ezifana nelaphu lomkhusane, ilaphu lesanti, ilaphu eludongeni, ilaphu lokuhombisa ngaphakathi kwemoto). Isilika ye-denier (ingakumbi isilika enamagqabi amathathu ayimilo ekhethekileyo) ifaneleka ngakumbi Ukulinganisa isilika ilaphu, isilika yedenier eshinyeneyo inokwenza ilaphu elifana noboya.