Yini i-PE?
I-PE, eyaziwa ngokuthi i-polyethylene (i-Polyethylene), ingenye yezinto zepulasitiki ezisetshenziswa kakhulu emhlabeni. Ngenxa yezakhiwo zayo ezinhle kakhulu zomzimba namakhemikhali, izinto ze-PE zisetshenziswa ezinhlobonhlobo zezimboni. Kusukela ezikhwameni zokupakisha kuya ezintweni zokubhoboza, i-polyethylene cishe yonke indawo. Kulesi sihloko, sizohlola ngokuningiliziwe ukuthi iyini i-PE, izinhlobo zayo, izakhiwo kanye nezindawo zokusetshenziswa.
1. Isakhiwo samakhemikhali nokuhlukaniswa kwe-PE
I-PE iyi-resin ye-thermoplastic eyakhiwe ngama-ethylene monomers ngokusebenzisa ukusabela kwe-polymerisation. Ngokuya ngengcindezi nezimo zokushisa ngesikhathi senqubo ye-polymerization, izinto ze-PE zingahlukaniswa zibe izinhlobo eziningana:
I-Low Density Polyethylene (LDPE): Lolu hlobo lwempahla ye-PE luhleleke ngokukhululekile phakathi kwamaketanga wamangqamuzana futhi lunomthamo ophansi.I-LDPE inokuguquguquka okuhle kanye ne-ductility, futhi isetshenziswa kabanzi ekukhiqizeni amafilimu epulasitiki, izinto zokupakisha, namafilimu ezolimo.

I-High Density Polyethylene (HDPE): Amaketanga e-molecular HDPE ahlelwe ngokuqinile futhi anomthamo omkhulu, ngakho abonisa amandla angcono nokumelana namakhemikhali.I-HDPE ivame ukusetshenziswa ekwenzeni amapayipi, amabhodlela neziqukathi zepulasitiki.

I-Linear Low Density Polyethylene (LLDPE): I-LLDPE i-polyethylene ene-low density enesakhiwo semolekyuli eqondile ehlanganisa ukuguquguquka kwe-LDPE namandla e-HDPE. Kuvame ukusetshenziselwa ukwenza ifilimu elula, izikhwama zepulasitiki nezinto zokupakisha zezimboni.

2. Izici eziyinhloko zezinto ze-PE
Impahla ye-PE inenani lezinto ezibonakalayo nezamakhemikhali eziphawulekayo ngenxa yesakhiwo sayo esiyingqayizivele samangqamuzana, okwenza iphumelele ezinhlobonhlobo zezinhlelo zokusebenza:
Ukumelana namakhemikhali: Impahla ye-PE inokumelana okuhle kakhulu nama-acids amaningi, ama-alkali, usawoti kanye nezincibilikisi ekamelweni lokushisa, okwenza ilungele izimboni zamakhemikhali nezemithi.

Ukumelana nomthelela omuhle namandla okuqina: I-HDPE, ikakhulukazi, inamandla aphezulu kanye nokuqina futhi ingamelana nokucindezeleka okuphezulu kwemishini, okuyenza ijwayele ukusetshenziselwa ukukhiqiza imikhiqizo edinga ukumelana nemithwalo.

Izakhiwo ezinhle kakhulu zokuvikela: I-PE impahla iyisivikeli esihle kakhulu sikagesi, esenza sisetshenziswe kabanzi njengesendlalelo sokuvikela izintambo nezintambo.

Ukumuncwa Amanzi Aphansi: Impahla ye-PE inokumunca amanzi okuphansi kakhulu futhi ngenxa yalokho igcina izakhiwo zayo ezibonakalayo ezindaweni ezinomswakama.

3. Izindawo zokusetshenziswa kwezinto ze-PE
Ngenxa yezinhlobonhlobo nezakhiwo zazo ezinhle kakhulu, izinto ze-PE zidlala indima ebalulekile empilweni yansuku zonke nasembonini. Ukwazi ukuthi iyini i-PE kusisiza ukuthi siqonde kangcono uhla lwayo olubanzi lwezinhlelo zokusebenza emikhakheni ehlukene:
Imboni yokupakisha: Izinto ze-PE zisetshenziswa kakhulu ekwenzeni amafilimu epulasitiki, izikhwama zokupakisha ukudla namafilimu ezolimo.I-LDPE ne-LLDPE zifaneleka ngokukhethekile ukwenza izinto ezihlukahlukene zokupakisha ngenxa yokuguquguquka kwazo okuhle kakhulu kanye ne-ductility.

Imboni yezokwakha namapayipi: I-HDPE ivame ukusetshenziswa ekukhiqizeni amapayipi amanzi, amapayipi egesi namapayipi amakhemikhali ngenxa yokucindezela kwayo okuhle kakhulu nokungagqwali.

Imikhiqizo yasendlini: Imikhiqizo eminingi yepulasitiki yansuku zonke, njengamabhakede, izikhwama zikadoti nezitsha zokugcina ukudla, yenziwe nge-polyethylene.

4. Ukuvikelwa kwemvelo kanye nokugaywa kabusha kwezinto ze-PE
Naphezu kwezinzuzo zayo eziningi, ukusetshenziswa kabanzi kwezinto ze-PE kulethe izinkinga zemvelo. Ngenxa yokuthi ayehlisi kalula kalula, imikhiqizo ye-PE elahliwe ingase ibe nomthelela omubi wesikhathi eside ku-ecosystem. Izinto ze-polyethylene zigaywa kabusha. Ngezindlela ezibonakalayo noma zamakhemikhali, imikhiqizo ye-PE elahliwe ingacutshungulwa kabusha ibe yizinto ezintsha, ngaleyo ndlela kuncishiswe umthelela emvelweni.
Isiphetho
Ngokuhlaziya okungenhla, sinokuqonda okuningiliziwe ngendaba yokuthi “yini impahla ye-PE”. Njengempahla yepulasitiki ebaluleke kakhulu, i-polyethylene isetshenziswa kabanzi ezimbonini ezahlukahlukene ngenxa yesakhiwo sayo esiyingqayizivele kanye nezakhiwo ezinhle kakhulu. Nakuba ukusetshenziswa kwayo kubangela izinselelo zemvelo, ukuphathwa okusimeme kwezinto ze-PE kungazuzwa ngokugaywa kabusha okunengqondo.