Umshini wokubumba umjovo we-PET preform ochwepheshe wehluka kakhulu emshinini wokubumba ojwayelekile wenhloso ejwayelekile., njengoba yakhiwe ngendlela ehlukile ukuze ivumelane nezakhiwo ezikhethekile zomzimba namakhemikhali e-PET resin, imishini evamile engakwazi ukukwamukela ngokugcwele. Impahla ye-PET ifaka ukumuncwa okuphezulu komswakama, ukuwohloka kokushisa okuzwelayo, i-viscosity encibilikayo ephansi, kanye nezidingo eziqinile zokufana kwe-plasticization kanye nesivinini sokubumba, …