Lub ntsiab raw khoom rau polyester yarn yog polyester fiber, muab rho tawm los ntawm roj av derivatives los ntawm cov tshuaj synthesis. Polyester fiber muaj lub zog siab thiab ua haujlwm tsis zoo, ua rau nws ruaj khov hauv kev siv textile. Hauv cov txheej txheem kev npaj cov khoom siv raw, cov chaw tsim khoom yaj polyester chips los tsim cov tshuaj spinning. Cov txheej txheem no yuav tsum muaj kev tswj xyuas qhov kub thiab txias kom ntseeg tau tias fiber ntau uniformity. Nyob rau hauv sib piv, tej yam ntuj tso fibers xws li paj rwb xov paj yog muab los ntawm cov nroj tsuag, thiab lawv cov txheej txheem ntau lawm yog nyob ntawm seb ua liaj ua teb tej yam kev mob, thaum lub raw khoom rau polyester yarn yog ruaj khov thiab tsis cuam tshuam los ntawm lub caij los yog huab cua.
Nyob rau hauv lub spinning theem, molten polyester yog tsim rau hauv filaments los ntawm ib tug spinneret thiab ces solidified nyob rau hauv ib tug txias cheeb tsam. Cov nascent fibers tau dhau los ua ntau theem ntawm kev ncab los txhim kho lawv cov kev npaj molecular thiab cov khoom siv kho tshuab. Cov txheej txheem stretching yog muab faib ua txias stretching thiab kub stretching; txias stretching nce fiber ntau zog, thaum kub stretching txhim kho nws elasticity. Piv rau cov xov paj nylon, polyester yarn muaj ntau dua modulus tom qab ncab, txhais tau tias nws tsis tshua muaj deformation, tab sis nylon yarn muaj elasticity me ntsis zoo dua polyester yarn. Qhov sib txawv no ua rau cov xov paj polyester zoo dua rau cov ntawv thov kom muaj kev ruaj ntseg.