Ngokufika kwehlobo, zonke izinhlobo zeziphuzo ngenkathi yokuthengisa, abathengi abaningi bayabuza: iliphi ibhodlela lesiphuzo eliphephe kakhulu? Ingabe wonke amathini aqukethe i-BPA?
.
Unobhala jikelele we-International Food Packaging Association, uchwepheshe wezokuvikela imvelo u-Dong Jinshi utshele abezindaba ukuthi ipulasitiki ye-polycarbonate equkethe i-bisphenol A ihlanzekile, akulula ukuphuka nezinye izici. Abakhiqizi bayisebenzisela ukwenza izinto ezihlukahlukene, njengezitsha zepulasitiki, amabhodlela amanzi epulasitiki, amabhodlela ezingane, amathini okudla okulula, njll. Ama-epoxy resins aqukethe i-bisphenol A asetshenziswa kakhulu ekunambeni kwangaphakathi kweziqukathi zokudla neziphuzo njengamakani okudla namathini. Isizathu sokuthi ibhokisi lokupakisha lamathini ensimbi namathini e-aluminium aqukethe i-bisphenol A ukuthi i-bisphenol A inomphumela omuhle wokulwa nokugqwala futhi ingavimbela ngokuphumelelayo umoya-mpilo kanye nama-microorganisms ukuthi angangeni ekani.
.
U-Dong Jinshi ukhumbuza, okwamanje iqukethe i-bisphenol A hhayi kuphela i-aluminium can cola, ne-iron can,aluminium can emaphaketheniye-poruel eyigugu eyisishiyagalombili, izithelo ezisemathinini nokunye futhi iqukethe i-bisphenol A. Nokho, u-Dong Jinshi uphinde waveza ukuthi lokhu akusho ukuthi wonke amathini aqukethe i-BPA, amanye amathini okwamanje enziwe ngepulasitiki, inqobo nje uma engenziwanga nge-PC. ipulasitiki, ayinayo i-BPA.

Isingeniso kuKhemistry
.
I-Bisphenol A, igama lesayensi le-2, 2-di (4-hydroxyphenyl) propane, iyinto ebalulekile yamakhemikhali ephilayo, i-phenol ne-acetone okuphuma okubalulekile kwe-bisphenol Imodeli yokugcwalisa isikhala samangqamuzana, esetshenziswa kakhulu ekukhiqizeni i-polycarbonate, i-epoxy. i-resin, i-polysulfone resin, i-polyphenyl ether resin, inhlaka ye-polyester engagcwele kanye nezinye izinto ze-polymer. Ingasetshenziswa futhi ekukhiqizeni i-plasticizer, i-flame retardant, i-antioxidant, i-heat stabilizer, i-raber antioxidant, i-pesticide, upende neminye imikhiqizo emihle yamakhemikhali.
.
Idatha ibonisa ukuthi i-bisphenol A iyikhemikhali enobuthi obuphansi. Ukuhlolwa kwezilwane kuye kwathola ukuthi i-bisphenol A inomphumela wokulingisa i-estrogen, noma ngabe umthamo uphansi kakhulu, ungenza isilwane sikhiqize ukuvuthwa kwabesifazane bokuqala, ukwehla kwesibalo sesidoda, ukukhula kwe-prostate kanye neminye imiphumela. Ngaphezu kwalokho, kuye kwaboniswa ukuthi i-bisphenol A ine-embryonic toxicity kanye ne-teratogenicity, engandisa kakhulu ukuvela komdlavuza we-ovarian, umdlavuza we-prostate, umdlavuza wegazi kanye nezinye izinhlobo zomdlavuza ezilwaneni.

Ungakhetha kanjani iziphuzo ezifakwe ethinini ezingekho-bisphenol A
.
Imakethe ye-bisphenol A ayikanyamalala, futhi izingozi ezingaba khona ze-bisphenol A zingase zibe khona. Ngakho-ke, yikuphi ukupakisha okuphephe kakhulu emakethe? Ungayibona kanjani imikhiqizo yepulasitiki equkethe i-bisphenol A?
.
Lapho ukhetha isiphuzo esifakwe ethinini, kubaluleke kakhulu ukufunda izinombolo ezibhalweni elingunxantathu ngaphansi kwebhodlela lepulasitiki. Ngenxa yokuthi inombolo ngayinye imelela impahla yepulasitiki, izinto ezihlukahlukene, ukusebenza okuhlukile, izimo zokusebenzisa okuphephile nazo zihlukile.
.
Ngokwendinganiso kazwelonke, “1″ imele i-PET(i-polyethylene terephthalate), evame ukusetshenziswa emabhodleleni amanzi amaminerali kanye namabhodlela esiphuzo se-carbonated. Ukumelana nokushisa okungu-70 ℃, kulungele kuphela iziphuzo zegumbi lokushisa noma iziphuzo eziqandisiwe, uketshezi lokushisa oluphezulu kulula ukuwohloka, ukusebenzisa isikhathi eside okuphindaphindiwe kungase kudedele amagesi ayingozi; “I-3″ imele i-PVC(7810,15.00,0.19%)(i-polyvinyl chloride), engakwazi ukusetshenziselwa ukupakisha ukudla; “4″ imele i-LDPE(i-polyethylene e-low density), esetshenziselwa ifilimu yokudla, ifilimu yepulasitiki, njll., uma ihlangana no-110 ℃, kuzoba nenkinga yokuncibilika okushisayo, ngakho-ke ngaphambi kokusebenzisa i-oven microwave, qiniseka ukuthi uyayisusa ifilimu yokudla. kuqala; “5″ imele i-PP(i-polypropylene), esetshenziswa kumabhokisi esidlo sasemini e-microwave futhi ekwazi ukushisisa; “6″ imele i-PS(polystyrene), esetshenziselwa ukwenza izitsha zamabhokisi e-noodle asheshayo namabhokisi okudla okusheshayo, kodwa ayikwazi ukushiswa kuhhavini we-microwave, futhi ingasetshenziswa ukulayisha i-asidi eqinile ne-alkaline; I-“7″ imele i-polycarbonate (PC) nezinye izinhlobo, okusho ukuthi uma inombolo ekunxantathu ingu-7, kufanele ibe ne-BPA.

Siyi-i-aluminium canukukhiqiza ngaphandle iminyaka engaphezu kwengu-15, iminyaka eminingi aluminium kungaba ukukhiqiza isipiliyoni, sinaka ukuphepha kokudla, ngoba aluminium can enamathela, konke ukusetshenziswa kwangaphakathi enamathela izinto ngokuvumelana namazinga kazwelonke, ukuqinisekisa ukuphepha, ngaphezu kwalokho, nathi futhi. khiqizaI-BPA yamahhala ye-aluminium can, wamukelekile amakhasimende avela kuwo wonke amazwe ukuthi eze azobonisana