Ingabe Iphepha Eligcotshwe Nge-PE Linobuthi? Ukuhlaziywa Okuphelele Kwezindinganiso Ezigunyaziwe Namaqiniso Esayensi
Iphepha elinoqweqwe lwe-PE, esetshenziswa kabanzi ekupakisheni ukudla kanye nezinto ezidliwayo nsuku zonke, ibilokhu idonsela ukunaka okukhulu kubathengi mayelana nokuphepha kwayo, umbuzo oyinhloko ugxile ku-“Ingabe Iphepha Elilaminethiwe le-PE “Kunobuthi?”. Ngokusekelwe ezindinganisweni zomhlaba wonke nezasekhaya kanye nedatha yokuhlola yobungcweti, impendulo icacile: Iphepha elifakwe i-PE elihlangabezana nezindinganiso zokuthobela imithetho alinangozi emzimbeni womuntu ngaphansi kwezimo ezijwayelekile zokusetshenziswa; izingozi zokuphepha zingaba khona kuphela uma umkhiqizo ungahambisani nemithetho noma usetshenziswa ezimweni ezingajwayelekile.
Isakhiwo esiyinhloko sephepha elinongwengwezi lwe-PE ukumboza ungqimba lwe-polyethylene (PE) esisekelweni sephepha ngenqubo yokubopha eshisayo. I-Polyethylene ngokwayo iyinto engasebenzi kahle enezakhiwo zamakhemikhali ezizinzile, eye yaqashelwa yizikhungo eziningi zomhlaba wonke njengezinto eziphephile zokuthintana nokudla. Izinga likazwelonke laseShayina i-GB/T 36392-2018 “Iphepha Elinongwezi kanye neBhodi Lokupakisha Ukudla” licacisa ngokusobala ukuthi ukufuduka okuphelele kwe-PE enongwezi iphepha lokudlaukuthintana kufanele kube ngu-≤10 mg/dm², okuqukethwe yi-heavy metal lead (Pb) kufanele kube ngu-≤3 mg/kg, i-cadmium (Cd) ≤0.2 mg/kg, futhi akukho zingxenye eziyingozi njengezibani ezikhanyisa ukukhanya ezizotholakala. I-US FDA ilawula ngokuqinile izinto zokumboza ze-PE zokuthintana kokudla nge-21 CFR 177.1520, idinga ukuthi okuqukethwe kwazo kwezinto ezifudukayo kuhlangabezane nemikhawulo yokuphepha.
Kunezici ezimbili ezibalulekile ezithinta ukuphepha kwephepha elinomshini we-PE. Okokuqala, ukuhambisana nomkhiqizo: Iphepha elinomshini we-PE elikhiqizwe abakhiqizi abangakahleleki lingasebenzisa imfucuza ephinde yasetshenziswa, izinto zokusetshenziswa ze-PE eziphansi, noma lengeze ama-plasticizer angavunyelwe njenge-phthalates, okubeka izingozi zokufuduka kwezinto eziyingozi. Okwesibili, izimo zokusetshenziswa: Indawo yokuncibilika kwe-PE cishe ingu-120-130℃. Lapho izinga lokushisa lesevisi lidlula u-110℃ (njengokushisa okuqondile kuhhavini we-microwave noma ukuthintana namalangabi avulekile), noma uma lithintana isikhathi eside nokudla okunamafutha okushisa okuphezulu, kungasheshisa ukufuduka kwezinto eziyingozi. Idatha yocwaningo ikhombisa ukuthi ukwanda kwamandla e-microwave kanye nokushisa kukhulisa kakhulu izinga lokufuduka kwama-plasticizer ephepheni elinomshini we-PE, lapho amandla e-microwave enomthelela osobala kakhulu, okungakhulisa izinga lokufuduka ngo-20%.
Ukuqinisekisa ukusetshenziswa okuphephile, abathengi nabathengi kufanele baqaphele amaphuzu amathathu: Okokuqala, khetha imikhiqizo enezitifiketi zokuthobela imithetho, njengephepha elinomumo we-PE elidlule isitifiketi se-FDA futhi elihlangabezana nezindinganiso zochungechunge lwe-GB 4806, bese uhlola imibiko yokuhlola kanye nezitifiketi zokuthobela imithetho ezinikezwe umenzi. Okwesibili, landela imininingwane yokusetshenziswa: gwema ukufudumala ukudla okupakishwe ephepheni elinomumo we-PE kuhhavini we-microwave, futhi ungakusebenzisi ukugcina ukudla okushisa okuphezulu okungaphezu kuka-100℃. Okokugcina, beka phambili imikhiqizo enezitifiketi zokuthobela imithetho. I-Virgin Wood Pulp izinto eziyisisekelo kanye nezinqubo zokubopha ezisekelwe emanzini, ezingagcini nje ngokuphepha okungcono kodwa futhi ezinciphisa ukukhishwa kwe-VOC futhi ezinobungani nemvelo.
Njengomhlinzeki wezixazululo zomkhiqizo wephepha ochwepheshe, I-Paperjoy’sImikhiqizo yephepha elimbozwe nge-PE isebenzisa izinto zokusetshenziswa ze-PE ezisezingeni lokudla kanye nezinto eziyisisekelo ze-pulp yokhuni eziqinisekiswe yi-FSC, ilandela izinqubo zokukhiqiza ezihlanzekile kuyo yonke indawo, idlula izitifiketi eziningi ezigunyaziwe njenge-FDA ne-ISO9001, futhi iqoqo ngalinye lemikhiqizo lihlonyiswe ngemibiko ephelele yokuhlola ukuqinisekisa ukusetshenziswa okuphephile ekupakisheni kokudla, ekuphekeni izinto ezidliwayo nakwezinye izimo.
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