Sebenzisa uchungechunge olubili noma ngaphezulu lwe-SJZ isikulufu esiyisikulufa esiyikhoni ukuze usebenzise ipayipi le-PVC elinezingqimba ezintathu elikhishwe ngokuhlanganyela. Isemishi ungqimba wepayipi kuyinto high-calcium PVC noma PVC Foam impahla eluhlaza.