st, ukwakheka kwezinto zayo kuqinisekisa ukuhlala isikhathi eside okungavamile: ipayipi le-PU (elisekelwe ku-polyester) liqhosha ngokuqina kwe-Shore A okungu-95±2, okunikeza ukumelana okuphezulu kokuklwebheka, ukuklebhuka, kanye nokushayisana—okusebenza kahle kakhulu kunezinye izindlela zerabha noma ze-PVC ngezikhathi ezingu-3-5 ezimweni ezigugile kakhulu (isb., ukudlulisa izinto ezi-granular njengesamente noma okusanhlamvu). Ukuqinisa okujikelezayo kwepulasitiki kuqeda isidingo sezintambo zensimbi esindayo (ngaphandle kokuthi kuchazwe) ngenkathi kugcinwa ubuqotho besakhiwo, okuvumela ipayipi ukuthi imelane nokucindezela okuhle kufika kumabha ayi-10 kanye nokucindezela okungekuhle (ukumunca) kwebha engu--0.9, okwenza ifaneleke kokubili ukulethwa kanye nokuphathwa kwezinto ezisekelwe ku-vacuum.
Okwesibili, inikeza ukuzivumelanisa nezimo okubanzi kwemvelo: isebenza ngokwethembeka emazingeni okushisa asukela ku--40°C kuya ku-90°C (ngokubekezelela isikhathi esifushane kufika ku-120°C), ihlala iguquguquka ngisho nasemakhazeni amakhulu (ngokungafani namapayipi e-PVC aqinile) futhi imelana nokuguquguquka ezindaweni ezishisa kakhulu. Ngaphezu kwalokho, inguqulo yezinga lokudla (ehambisana nezindinganiso ze-EU 10/2011 kanye ne-FDA) ayinayo i-phthalates, i-BPA, kanye nezinsimbi ezisindayo, okwenza iphephe ekudluliseni uketshezi oludliwayo (amajusi, iwayini, ubisi) noma izithako zokudla ezomile—ezibalulekile ekucutshungulweni kokudla nasekukhiqizweni kweziphuzo. Ekusetshenzisweni kwezimboni, ibonisa ukumelana okuhle kwamakhemikhali namafutha, ama-asidi amnene, ama-alkali, kanye nezinyibilikisi, igwema ukuwohloka ezimweni zokusebenza ezinzima.
Okwesithathu, ukwakheka kwayo okugxile kumsebenzisi kuthuthukisa ukusebenza kahle: udonga lwangaphakathi olubushelelezi kakhulu (i-Ra < 0.5 μm) lunciphisa ukulahleka kokungqubuzana, luqinisekisa ukugeleza koketshezi, izimpushana, noma amagesi okungavinjelwe ngenkathi luvimbela ukwakheka kwezinsalela (okwenza kube lula ukuhlanza nokunciphisa izindleko zokulungisa). Ukwakhiwa okulula (≈30% kube lula kunamapayipi enjoloba anobubanzi obufanayo) kanye nesakhiwo esijikelezayo esingamelani nokugoba kuvumela ukujika okulula, ukugoba, kanye nokugoba—kulungile ezindaweni eziqinile (isb., umoya womshini, izingxenye zenjini yemikhumbi) noma izinhlelo zokusebenza zeselula (isb., izifutho zezolimo, amaphampu endawo yokwakha). Osayizi abangenziwa ngezifiso (ububanzi bangaphakathi: 25mm–300mm; ukujiya kodonga: 0.6mm–2mm) kanye nezinketho zombala (ezibonakalayo, ezimnyama, noma ezenziwe ngokwezifiso) zivumelana nezidingo ezithile, kusukela ekudlulisweni koketshezi lwelabhorethri oluncane kuya ekuthuthweni kwe-slurry yezimayini enkulu.