Umgomo wokuqala wokulungiswa kwemfucuza yamaphakethe wepulasitiki uwukugaywa kabusha kweziqukathi njengezinsiza zokuvikela izinsiza ezilinganiselwe nokuqedela ukugaywa kabusha kweziqukathi zokupakisha.Phakathi kwazo, amabhodlela angu-28% e-PET (i-polyethylene terephthalate) asetshenziselwa iziphuzo ze-carbonated angaphinde asetshenziswe, futhi i-HD-PE (i-polyethylene ephezulu kakhulu) kanye ne-HD-PE yamabhodlela obisi nawo angaphinda asetshenziswe ngokuphumelelayo.Ukuze kube lula ukugaywa kabusha kwezinhlobo ezahlukahlukene zemikhiqizo yepulasitiki ngemuva kokusetshenziswa, kuyadingeka ukuhlunga izinhlobo ezahlukahlukene zemikhiqizo yepulasitiki.Ngenxa yokuthi kuneziteshi eziningi neziyinkimbinkimbi zokusebenzisa ipulasitiki, kunzima ukuhlukanisa ezinye izinhlobo zemikhiqizo yepulasitiki ngemuva kokusetshenziswa ngokubukeka nje.Ngakho-ke, kungcono ukumaka izinhlobo zezinto ezibonakalayo emikhiqizweni yepulasitiki.Yiziphi ukusetshenziswa, izinzuzo kanye nokubi kwamakhodi ahlukene?Okuqukethwe kohlelo lokuhlonza ipulasitiki le-SPI kuzokwethulwa ngezansi.
Igama lepulasitiki - ikhodi kanye nekhodi yesifinyezo ehambisanayo kanje:
I-polyester - i-01 PET(PET ibhodlela), njengeibhodlela lamanzi amamineralikanye nebhodlela lesiphuzo se-carbonated.Ukusikisela: Ungawasebenzisi kabusha amanzi ashisayo emabhodleleni eziphuzo.
Sebenzisa: Ayizweli ekushiseni ku-70 ℃, futhi ifaneleka kuphela ukugcwalisa iziphuzo ezifudumele noma iziphuzo eziqandisiwe.Uma igcwele uketshezi olunezinga lokushisa eliphezulu noma ukushisisa, kulula ukuyikhubaza, futhi izinto eziyingozi emzimbeni womuntu zizoncibilika.Ngaphezu kwalokho, ososayensi bathola ukuthi ngemva kwezinyanga ezingu-10 zokusetshenziswa, ipulasitiki enguNo. 1 ingase ikhulule i-carcinogen DEHP, enobuthi kumasende.Ngakho-ke, lapho ibhodlela lesiphuzo seliphelile, lilahle, futhi ungalisebenzisi njengenkomishi yamanzi noma isitsha sokugcina ukuze uphathe ezinye izinto, ukuze ugweme ukubangela izinkinga zempilo.
High density polyethylene - 02 HDPE, njengeimikhiqizo yokuhlanzakanye nemikhiqizo yokugeza.Ukusikisela: Akutuswa ukugaywa kabusha uma ukuhlanza kungaphelele.
Sebenzisa: Ingasetshenziswa kabusha ngemva kokuhlanza ngokucophelela, kodwa lezi zitsha ngokuvamile akulula ukuzihlanza.Imikhiqizo yokuhlanza yasekuqaleni ihlala futhi iba indawo eshisayo yamagciwane.Kungcono ungazisebenzisi kabusha.
I-PVC - 03 i-PVC, njengezinto ezithile zokuhlobisa
Sebenzisa: Le nto kulula ukukhiqiza izinto eziyingozi uma kushisa, futhi izokhishwa ngesikhathi sokukhiqiza.Ngemva kokuba izinto ezinobuthi zingena emzimbeni womuntu nokudla, zingase zidale umdlavuza webele, ukukhubazeka kokuzalwa kwezingane ezisanda kuzalwa nezinye izifo.Njengamanje, iziqukathi ezenziwe ngale nto azisetshenziselwa ukupakisha ukudla.Uma isetshenziswa, ungakuvumeli ukushisisa.
I-polyethylene ye-low density - 04 LDPE, njengefilimu egciniwe, ifilimu yepulasitiki, njll. Ukusikisela: Ungagoqeli ukugoqa kwepulasitiki endaweni yokudla kuhhavini wemicrowave.
Sebenzisa: Ukumelana nokushisa akuqinile.Ngokuvamile, ifilimu efanelekile yokugcina i-PE izoncibilika lapho izinga lokushisa lidlula u-110 ℃, lishiye ezinye izinto zepulasitiki ezingakwazi ukubola umzimba womuntu.Ngaphezu kwalokho, uma ukudla kugoqwe ngepulasitiki yokugoqa ukuze kufudumale, amafutha ekudleni angancibilika kalula izinto eziyingozi ekugoqweni kwepulasitiki.Ngakho-ke, lapho ukudla kufakwa kuhhavini we-microwave, ifilimu egoqiwe yokugcina kufanele isuswe kuqala.
I-Polypropylene - 05 PP(ekwazi ukumelana namazinga okushisa angaphezu kuka-100 ℃), njengeibhokisi lesidlo sasemini se-oven microwave.Ukusikisela: Susa isembozo lapho usifaka kuhhavini we-microwave
Sebenzisa: Okuwukuphela kwebhokisi lepulasitiki elingafakwa kuhhavini we-microwave lingasetshenziswa kabusha ngemva kokuhlanza ngokucophelela.Ukunakwa okukhethekile kufanele kukhokhwe kwamanye amabhokisi esidlo sasemini kuhhavini we-microwave.Umzimba webhokisi wenziwe ngempela ngo-No. 5 PP, kodwa ikhava yebhokisi yenziwe ngeNombolo 1 PE.Njengoba i-PE ingakwazi ukumelana nokushisa okuphezulu, ayikwazi ukufakwa kuhhavini we-microwave kanye nomzimba webhokisi.Ukuze ube ohlangothini oluphephile, susa ikhava ngaphambi kokufaka isitsha kuhhavini ye-microwave.
I-Polystyrene - 06 PS(Ukumelana nokushisa kungu-60-70 ° C, iziphuzo ezishisayo zizokhiqiza ubuthi, futhi i-styrene izokhishwa lapho ishisa) Isibonelo: isitsha esipakishwe amabhokisi ama-noodle asheshayo, amabhokisi okudla okusheshayo.
Isiphakamiso: Ungasebenzisi ihhavini ye-microwave ukupheka izitsha zama-noodle asheshayo: ayikwazi ukumelana nokushisa futhi imelana nokubanda, kodwa ayikwazi ukufakwa kuhhavini we-microwave ukuze ugweme ukukhipha amakhemikhali ngenxa yokushisa okuphezulu.Futhi ayikwazi ukusetshenziselwa ukulayisha i-asidi eqinile (njengejusi yewolintshi) kanye nezinto ezinamandla ze-alkaline, ngoba izobola i-polystyrene embi emzimbeni womuntu futhi kulula ukuyibangela umdlavuza.Ngakho-ke, kufanele uzame ukugwema ukupakisha ukudla okushisayo emabhokisini okudla okusheshayo.
Amanye amakhodi epulasitiki - 07 Okunyenjenge: igedlela, inkomishi, ibhodlela lobisi
Ukusikisela: I-PC glue ingasetshenziswa uma kwenzeka kukhishwa ukushisa i-bisphenol A: iyinto esetshenziswa kabanzi, ikakhulukazi emabhodleleni obisi.Kuyimpikiswano ngoba iqukethe i-bisphenol A. Lin Hanhua, uprofesa ohlangene eMnyangweni Wezesayensi Yezesayensi Yezinto Eziphilayo kanye neKhemistry yaseCity University yaseHong Kong, uthe ngokwembono, inqobo nje uma i-BPA iguqulwa ibe isakhiwo sepulasitiki 100% ngesikhathi sokwenza i-PC. , kusho ukuthi imikhiqizo ayinayo i-BPA, ingasaphathwa eyokuyikhulula.Kodwa-ke, uma inani elincane le-bisphenol A lingaguqulwa libe yisakhiwo sepulasitiki se-PC, ingase ikhishwe ibe ukudla noma isiphuzo.Ngakho-ke, kubalulekile ukuqaphela lapho usebenzisa lesi sitsha sepulasitiki.
Isikhathi sokuthumela: Dec-16-2022