Ukuchazwa kwe-"EP" kuthatha inqolobane eqinisekisiwe ngokulungiswa kwebhola ezenziwe ngezinqolobane zombala ophefumayo we-Polyester (E, esivela ku ‘Ethylene terephthalate’) njengezinkambu zomgca wokuphakama kanye ne-Polyamide (N, esivela ku ‘Nylon’) njengezinkambu zomgca wokunqamula. I-polyester inikeza imodi lulungelelaniso kanye nemiphumela emncane, ihlinzeka umgubhu wokukhipha ungashintekiwe ngisho xa kugcinwa khona ubunzima, ngelahluko i-polyamide (nylon) inikeza ukukhathaza okuphezulu kanye nokukhathaza okungcono. Ngakho-ke, umgubhu wokukhipha we-EP unikeza umbono obuhle bempawu, wenza kube yinto ebalulekile kakhulu ekusebenziswa kakhulu ezintsheleni ezide kanye nezide, kumasebele amandla aphakeme emithethweni yokukhipha eminingi, isebenziswa kakhulu ekukhipheni ikholi yesimilo kanye nezinye izithuthi.
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