I-HDPEkanye ne-PVC

Izinto zepulasitiki zinwebeka kakhulu futhi zithambile. Zingabunjwa, zicindezelwe noma ziphonswe emimoyeni ehlukene. Ngokuyinhloko zenziwe ngamafutha negesi yemvelo. Kunezinhlobo ezimbili zamapulasitiki; thermoplastic kanye thermoset polymers.

Nakuba ama-polymers e-thermoset angancibilika futhi akheke kanye kuphela futhi ahlale eqinile uma esepholile, ama-thermoplastics angancibilika futhi akheke ngokuphindaphindiwe futhi ngenxa yalokho aphinde asetshenziswe.

I-Thermoplastics isetshenziselwa ukwenza iziqukathi, amabhodlela, amathangi kaphethiloli, amatafula asongayo nezihlalo, amashede, izikhwama zepulasitiki, izivikela-zintambo zamakhebula, amaphaneli angangenwa izinhlamvu, amathoyizi e-pool, i-upholstery, izingubo zokugqoka kanye namapayipi.

Kunezinhlobo eziningana ze-thermoplastics, futhi zihlukaniswa njenge-amorphous noma i-semi-crystalline. Ezimbili zazo ziyi-amorphousI-PVC(i-polyvinyl chloride) kanye ne-semi-crystalline HDPE (i-polyethylene ephakeme kakhulu). Zombili zingama-polymers wezimpahla.

I-Polyvinyl chloride (PVC) iyi-polymer ye-vinyl engabizi futhi ehlala isikhathi eside esetshenziswa kumaphrojekthi wokwakha. Ipulasitiki yesithathu esetshenziswa kakhulu ngemuva kwe-polyethylene ne-polypropylene futhi isetshenziswa kabanzi ekukhiqizeni amapayipi. Ayisindi futhi inamandla, okwenza idume kakhulu ezinhlelweni zamapayipi ezingaphezulu komhlaba nezingaphansi komhlaba. Iqine kakhulu futhi ifanele ukungcwatshwa okuqondile kanye nokufakwa kwe-trenchless.

Ngakolunye uhlangothi, i-high density polyethylene (HDPE) iyi-polyethylene thermoplastic eyenziwe nge-petroleum. Inamandla aphakeme, ilukhuni, futhi ikwazi ukumelana namazinga okushisa aphezulu.
Amapayipi e-HDPE alungele ukusetshenziswa kumapayipi angaphansi komhlaba, njengoba atholakale edambisa futhi amunca amagagasi okwethuka, ngaleyo ndlela anciphise ukukhuphuka okungase kube nomthelela ohlelweni. Futhi banokumelana okungcono kakhulu kokucindezelwa kwamalunga futhi ayakwazi ukuhuzuka nokumelana nokushisa.

Nakuba zombili izinto ezisetshenziswayo ziqinile futhi zihlala isikhathi eside, ziyahlukahluka ngamandla nezinye izici. Ngakolunye uhlangothi, zenzelwe ukumelana nokucindezeleka okuhlukahlukene. Ukuze kuzuzwe isilinganiso sokucindezela esifanayo njengepayipi le-PVC, udonga lwamapayipi e-HDPE kufanele lube lugqinsi izikhathi ezingu-2.5 kunepayipi le-PVC.

Yize zombili lezi zinto zisetshenziselwa ukwenza iziqhumane,I-HDPEitholwe ifaneleka kakhudlwana futhi iphephe kakhudlwana ukuyisebenzisa ngoba ingaqhumisa iziqhumane endaweni ephakeme efanele. Uma ihluleka ukuqala ngaphakathi kwesiqukathi bese iphuka, isiqukathi se-HDPE ngeke siphuke ngamandla njengesiqukathi se-PVC.

Ukufingqa:

1. I-Polyvinyl Chloride (PVC) iyi-polymer ye-vinyl engabizi futhi ehlala isikhathi eside esetshenziswa kumaphrojekthi wokwakha, kuyilapho i-High Density Polyethylene (HDPE) iyi-polyethylene thermoplastic eyenziwe nge-petroleum.
2. I-Polyvinyl chloride iyipulasitiki yesithathu esetshenziswa kakhulu, futhi i-polyethylene ingenye yepulasitiki esetshenziswa kakhulu.
3. I-PVC i-amorphous, kuyilapho i-HDPE iyi-semi-crystalline.
4. Zombili ziqinile futhi zihlala isikhathi eside, kodwa zinamandla ahlukene kanye nezinhlelo zokusebenza ezahlukene. I-PVC iyasinda futhi inamandla, kuyilapho i-HDPE iqinile, imelana kakhulu futhi imelana nokushisa.
5. Amapayipi e-HDPE atholwe ukuthi acindezele futhi amunce amagagasi okushisa, ngaleyo ndlela anciphise ukukhuphuka okungathinta uhlelo, kuyilapho i-PVC ingakwazi.
6. I-HDPE ifaneleka kakhulu ukufakwa kwengcindezi ephansi, kuyilapho i-PVC ifaneleka kakhulu ukungcwatshwa okuqondile nokufakwa kwe-trenchless.