I-HDPEkanye ne-PVC

Izinto zepulasitiki ziyanwebeka kakhulu futhi ziyaguquguquka. Zingabunjwa, zicindezelwe noma zifakwe ezimweni ezahlukene. Zenziwe kakhulu ngowoyela negesi yemvelo. Kunezinhlobo ezimbili zepulasitiki; ama-thermoplastic kanye nama-thermoset polymers.

Nakuba ama-polymer e-thermoset angancibilikiswa futhi akhiwe kanye kuphela futhi ahlale eqinile uma esepholile, ama-thermoplastic angancibilikiswa futhi akhiwe ngokuphindaphindiwe ngakho-ke angaphinde asetshenziswe.

Ama-thermoplastic asetshenziselwa ukwenza izitsha, amabhodlela, amathangi kaphethiloli, amatafula nezihlalo ezigoqekayo, amashede, izikhwama zepulasitiki, izivikelo zekhebula, amaphaneli angangenwa yizinhlamvu, amathoyizi echibi, izimpahla zokugqoka, izingubo kanye namapayipi.

Kunezinhlobo eziningana ze-thermoplastics, futhi zihlukaniswa njenge-amorphous noma i-semi-crystalline. Ezimbili zazo azi-amorphousI-PVC(i-polyvinyl chloride) kanye ne-semi-crystalline HDPE (i-polyethylene enobuningi obuphezulu). Zombili ziyi-polymers yezimpahla.

I-Polyvinyl chloride (PVC) iyi-polymer ye-vinyl engabizi futhi eqinile esetshenziswa emisebenzini yokwakha. Iyipulasitiki yesithathu esetshenziswa kakhulu ngemuva kwe-polyethylene ne-polypropylene futhi isetshenziswa kabanzi ekukhiqizweni kwamapayipi. Ilula futhi iqinile, okwenza ithandwe kakhulu ekusetshenzisweni kwamapayipi angaphezu komhlabathi nangaphansi komhlaba. Iqinile kakhulu futhi ifaneleka ukungcwaba ngqo nokufakwa ngaphandle kwemisele.

Ngakolunye uhlangothi, i-polyethylene enesisindo esiphezulu (i-HDPE) iyi-thermoplastic ye-polyethylene eyenziwe nge-petroleum. Inamandla aphezulu, iqinile, futhi ingamelana namazinga okushisa aphezulu.
Amapayipi e-HDPE alula ukusetshenziswa kumapayipi angaphansi komhlaba, njengoba kutholakale ukuthi ayawanciphisa futhi amunce amagagasi okushaqeka, ngaleyo ndlela anciphise ukukhuphuka okungathinta uhlelo. Aphinde abe nokumelana okuhle kakhulu nokucindezelwa kwamalunga futhi ayakwazi ukukhubeka nokumelana nokushisa.

Nakuba zombili izinto ziqinile futhi zihlala isikhathi eside, ziyahlukahluka ngamandla nangezinye izici. Ngakolunye uhlangothi, zenzelwe ukumelana nokucindezeleka okuhlukene. Ukuze kufezwe isilinganiso sokucindezela esifanayo nepayipi le-PVC, udonga lwepayipi le-HDPE kumele lube lukhuni ngokuphindwe kabili kunepayipi le-PVC.

Nakuba zombili izinto zisetshenziselwa ukwenza iziqhumane,I-HDPEKutholakale ukuthi ifaneleka kakhulu futhi iphephile ukuyisebenzisa ngoba ingadubula iziqhumane zifike ekuphakameni okufanele. Uma yehluleka ukuqala ngaphakathi kwesitsha bese iphuka, isitsha se-HDPE ngeke siphuke ngamandla amaningi njengesitsha se-PVC.

Ngamafuphi:

1. I-Polyvinyl Chloride (PVC) iyi-polymer ye-vinyl engabizi futhi eqinile esetshenziswa kumaphrojekthi okwakha, kanti i-High Density Polyethylene (HDPE) iyi-thermoplastic ye-polyethylene eyenziwe nge-petroleum.
2. I-Polyvinyl chloride iyipulasitiki yesithathu esetshenziswa kakhulu, kanti i-polyethylene ingenye yamapulasitiki asetshenziswa kakhulu.
3. I-PVC ayifani, kuyilapho i-HDPE ifana nekristalu.
4. Zombili ziqinile futhi zihlala isikhathi eside, kodwa zinamandla ahlukene kanye nezinhlelo zokusebenza ezahlukene. I-PVC inzima futhi inamandla, kuyilapho i-HDPE iqinile, imelana nokuguguleka futhi imelana nokushisa.
5. Kutholakale ukuthi amapayipi e-HDPE acindezela futhi amunca amaza okushaqeka, ngaleyo ndlela anciphise ukukhuphuka okungathinta uhlelo, kuyilapho i-PVC ingakwazi.
6. I-HDPE ifaneleka kakhulu ekufakweni komfutho ophansi, kanti i-PVC ifaneleka kakhulu ekufakweni okuqondile kanye nokungenawo umsele.