Uma kubhekwa inani lezinketho ezitholakalayo, ukukhetha isikhwama sepulasitiki esifanele kungaba umsebenzi onzima.Lokho kungenxa yokuthi izikhwama zepulasitiki zenziwe ngezinto ezahlukene futhi ngayinye yalezi zinto inikeza abasebenzisi izici ezithile.Abuye eze ngezindlela ezihlukahlukene ezixubile nemibala.
Kunezinguqulo eziningi zezikhwama zepulasitiki laphaya, kodwa-ke, ngokuzijwayeza ngohlobo ngalunye, unganciphisa ukukhetha kwakho kakhulu futhi ukhethe isikhwama esifanele izidingo zakho.Ngakho-ke, ake singene sibheke izinhlobo ezahlukene zezikhwama zepulasitiki ezitholakala emakethe namuhla:
I-High Density Polyethylene (HDPE)
Enye yepulasitiki evamile esetshenziswa emhlabeni wonke, i-HDPE ihlanganisa izimfanelo ezihlukahlukene, okwenza kube yinto enhle kakhulu yokukhiqiza izikhwama zepulasitiki.Ayisindi, ayibonakali ngalutho, imelana namanzi nezinga lokushisa, futhi inamandla aphezulu okushuba.
Ngaphandle kwalokho, izikhwama zepulasitiki ze-HDPE zihlangabezana neziqondiso zokuphatha ukudla kwe-USDA kanye ne-FDA, ngaleyo ndlela zizenze zibe ukukhetha okudumile kokubili kokugcina nokuphakela ukudla ekukhipheni nasekudayiseni.
Izikhwama zepulasitiki ze-HDPE zingatholakala ezindaweni zokudlela, ezitolo, ezitolo zegrosa, ezitolo zokudla ngisho nasezindlini ukuze zigcinwe futhi zipakishwe.I-HDPE iphinde isetshenziselwe izikhwama zikadoti, izikhwama zezinsiza, izikhwama zezikibha, nezikhwama zokuwasha, phakathi kokunye.
I-Low Density Polyethylene (LDPE)
Lolu hlobo lwepulasitiki luvame ukusetshenziselwa izikhwama zezinsiza, izikhwama zokudla, izikhwama zesinkwa kanye nezikhwama ezinamandla alinganiselwe kanye nezakhiwo zokunwebeka.Yize i-LDPE ingaqinile njengezikhwama ze-HDPE, iyakwazi ukugcina izinto eziyinqwaba, ikakhulukazi ukudla nemikhiqizo yenyama.
Ngaphezu kwalokho, ipulasitiki ecacile yenza kube lula ukuhlonza okuqukethwe, okuvumela i-restaurateur ukuthi ihambisane nesilungiselelo esisheshayo samakhishi okuhweba.
Sesikushilo lokho, izikhwama zepulasitiki ze-LDPE zishintshashintsha kakhulu futhi zithandwa ukusetshenziswa ngokuvala ukushisa ngenxa yokuncibilika kwazo okuphansi.I-LDPE iphinde ihlangabezane ne-USDA kanye ne-FDA imihlahlandlela yokuphatha ukudla futhi futhi ngezinye izikhathi isetshenziselwa ukwenza ukugoqa kwebhamuza.
I-Linear Low Density Polyethylene (LLDPE)
Umehluko omkhulu phakathi kwezikhwama zepulasitiki ze-LDPE ne-LLDPE ukuthi lezi zakamuva zinegeji elincanyana.Kodwa-ke, into engcono kakhulu ngale plastiki akukho mehluko emandleni, okuvumela abasebenzisi ukuthi bonge imali ngaphandle kokuyekethisa ngekhwalithi.
Izikhwama ze-LLDPE zibonisa izinga elilinganiselwe lokucaca futhi zisetshenziselwa ukukhiqiza izikhwama zokudla, izikhwama zamaphephandaba, izikhwama zokuthenga kanye nezikhwama zikadoti.Zingabuye zisetshenziselwe ukugcina ukudla emafrijini naseziqandisini, ngenxa yalokho zisetshenziselwa ukugcina ukudla okuyinqwaba emakhishini okuhweba.
I-Medium Density Polyethylene (MDPE)
I-MDPE icace ngokuqhathaniswa kune-HDPE, kodwa ayicacile njenge-polyethylene ene-low density.Izikhwama ezenziwe nge-MDPE azihlotshaniswa nezinga eliphezulu lamandla, futhi azinwebeki kahle, ngaleyo ndlela azikhethelwa ukuthwala noma ukugcinwa kwemikhiqizo eyinqwaba.
Kodwa-ke, i-MDPE iyinto evamile yezikhwama zikadoti futhi ngokuvamile isetshenziswa ekufakweni kwabathengi emikhiqizweni yephepha njengephepha le-toiler noma amathawula ephepha.
I-Polypropylene (PP)
Izikhwama ze-PP zibonakala ngamandla azo amakhemikhali amangalisayo nokumelana.Ngokungafani nezinye izikhwama, izikhwama ze-polypropylene aziphefumuli futhi zilungele izimo zokuthengisa ngenxa yokuphila kwazo isikhathi eside.I-PP iphinde isetshenziselwe ukupakisha ukudla, lapho izinto ezinjengamaswidi, amantongomane, amakhambi nokunye okugcotshwayo kungagcinwa kalula ezikhwameni ezenziwe ngawo.
Lezi zikhwama zicace ngokuqhathaniswa kunezinye, zivumela abasebenzisi ukubonakala okuthuthukisiwe.Izikhwama ze-PP nazo zilungele ukuvala ukushisa ngenxa yezinga eliphezulu lokuncibilika, futhi, njengezinye izinketho zezikhwama zepulasitiki, yi-USDA ne-FDA egunyazwe ukuphatha ukudla.