Kub yaj yarn yog ib hom khoom siv raw khoom, feem ntau yog tsim los ntawm hluavtaws lossis yas fibers. Thaum lub sij hawm tsim cov txheej txheem, cov fibers yog rhuab mus rau lub xeev molten los ntawm melting technology thiab ces tsim rau hauv xov paj los ntawm txoj kev xws li spinning los yog twisting. Cov xov paj kub yaj yog tus cwj pwm los ntawm nws qhov hnav tsis kam, yooj yim tu, thiab wrinkle tsis kam, thiab feem ntau yog siv rau hauv thaj chaw xws li khoom vaj khoom tsev, khaub ncaws, thiab kev lag luam.
Tshwj xeeb, cov khoom tseem ceeb ntawm cov xov paj kub yaj yuav muaj xws li polypropylene (PP), polyethylene (PE), polyamides (xws li nylon, polyimide, thiab lwm yam), thiab lwm yam ntaub ntawv polyester.
Cov xov paj kub yaj tuaj yeem raug cais raws li nws cov ntsiab lus melting. Piv txwv li, muaj tag nrho melted low-melting-point fibers, tawv-core bi-component low-melting-point fibers, thiab low-melting-point yarns, tseem hu ua kub yaj yarn. Cov low-melting-point fibers no yog ua tiav los ntawm kev ntxiv cov hloov pauv monomers rau cov pa polymers kom txo cov polymer lub melting point. Los ntawm kev siv cov monomers sib txawv thiab cov nqi, ntau cov fibers nrog cov ntsiab lus sib txawv tuaj yeem npaj tau.
