Abakhiqizi abaningi bemikhiqizo ye-PVC abahlose izimakethe zase-US naseYurophu babhekene nezinkinga zokuthobela imithetho njalo. Ngisho noma kunezitifiketi zokuhlolwa komkhiqizo eziqediwe, amaqoqo asahluleka ukuhlolwa kwamasiko noma enqatshwa abathengi ngenxa yeziqinisi ze-PVC ezingalandeli imithetho. Izinkinga eziningi zokuthobela imithetho aziveli ezinqubweni zokukhiqiza ezinephutha, kodwa zivela emininingwaneni enganakwa ekukhetheni iziqinisi, amazinga okuhlola ukufuduka, kanye nomehluko olinganiselwe phakathi kwemithetho ye-FDA neye-EU.
Iziqinisi ze-PVC zezinga lokudla ziyizithasiselo eziyinhloko ezisebenzayo eziqinisekisa ukuphepha kokuxhumana kokudla kwefilimu yokunamathela ye-PVC, amashidi okupakisha ukudla, kanye namapayipi amanzi okuphuza. Ngokungafani neziqinisi zezimboni ezijwayelekile, izinhlobo zezinga lokuxhumana kokudla kumele zihlolwe ngokuqinile ubuthi futhi zihambisane nezindinganiso zomthetho zesifunda esithile.
Kungani Ukuthobela I-Stabilizer Kunquma Ukufaneleka Kokuxhumana Kokudla kwe-PVC
I-resin ye-PVC ngokwayo inezakhiwo zomzimba ezizinzile kanye nokusetshenziswa okubanzi emikhiqizweni yokuxhumana kokudla, kodwaiziqinisi zokushisaOkungeziwe ngesikhathi sokucubungula kuthinta ngqo ukusebenza kwayo kokuphepha. Iziqinisi zensimbi esindayo ezisekelwe ku-lead, ezisekelwe ku-cadmium ziletha imiphumela emihle kakhulu yokuzinza kodwa azivunyelwe ngokuphelele ezimweni zokuthintana nokudla emhlabeni jikelele ngenxa yobuthi obuqhubekayo kanye nezingozi zokufuduka.
Ngobaimikhiqizo ye-PVC yezinga lokudla, ubumsulwa besiqinisi, ivolumu eseleyo yensimbi esindayo, kanye nokuqina kokufuduka kwezinga lokushisa eliphezulu kuba yizinkomba zokuhlola eziyinhloko. Abalawuli kanye nabathengi baphesheya abasahloli nje kuphela ukuphepha komkhiqizo oqediwe; balandelela ukuhambisana nezithasiselo zezinto zokusetshenziswa. Lokhu kusho ukuthi izinhlelo zokuqinisi ezivunyiwe yi-FDA kanye ne-EU kuphela ezingasekela ukuthunyelwa kwemikhiqizo yokuxhumana yokudla ye-PVC isikhathi eside, okufanelekile.
Izimo ezintathu eziyinhloko zokuxhumana nokudla kwe-PVC ziye zahlukanisa izinto ezibalulekile zokuthobela imithetho ngokusekelwe ezimweni zangempela zesevisi. Izinto zokupakisha ukudla ze-PVC ezithinta ukudla okune-asidi, okunamafutha, kanye nokushisa okuphezulu zidinga ukulawulwa okuqinile kwenani eliphelele lokufuduka. Amafilimu okunamathela kokudla acacile adinga ubumsulwa obuqinile bokuzinza ukuze kugwenywe imvula kanye nokungcola. Amapayipi eziphuzo e-PVC agxile ezimweni zokucwiliswa emanzini isikhathi eside abeka phambili ukusebenza okuzinzile kwesikhathi eside kokulwa nokufuduka kwezinzinzi.
Imithetho Esebenzayo Yokuthobela Imithetho ye-FDA Yama-Food Grade PVC Stabilizers
Ukuthobela imithetho ye-US yokuxhumana nokudla kwe-PVC kulandela imithethonqubo ye-FDA 21 CFR Ingxenye 177 kanye ne-178, enezidingo ezicacile neziphoqelelwayo zezinhlobo zokuzinzisa ezivunyelwe, imikhawulo yensimbi esindayo, kanye nezimo zokuhlola ukufuduka. Ngokungafani nemithethonqubo engacacile yemboni, imithetho ye-FDA ichaza izinkomba ezingabalwa ezifanele ukukhiqizwa kweqembu kanye nokuhlolwa kokuthunyelwa kwamanye amazwe.
Ngokuphathelene nemvume yezinto ezibonakalayo, i-FDA ivumela kuphelaisiqinisi esingeyona ubuthiizinhlelo ezifaka phakathi iziqinisi ze-calcium zinc kanye neziqinisi ze-organotin ezivunyiwe zokukhiqizwa kwe-PVC yokuxhumana kokudla. Zonke iziqinisi zensimbi esindayo eziqukethe i-lead, i-cadmium, i-mercury, kanye ne-hexavalent chromium zivinjelwe ngokusobala, futhi azibekezeleli nhlobo izinsimbi ezisindayo ezisele ezithasiselweni eziqediwe.
Ekuhlolweni kokufuduka, i-FDA ihlukanisa amazinga okuhlola ngokwemidiya yokulingisa ukudla kanye nokushisa kwesevisi. Ukudla okunamanzi, ukudla okune-asidi, kanye nokudla okunamafutha kuhambisana nezimo ezahlukene zokulingisa i-solvent. Umthamo wokushisa we-stabilizer ngaphansi kwesitoreji sokushisa okuphansi kanye nezimo zokushisa eziphakeme kumele zombili zihlangabezane nemikhawulo ecacisiwe. Ngaphezu kwalokho, i-FDA ibeka imikhawulo ecacile yesilinganiso esiphezulu seziqinisi kumafilimu e-PVC aguquguqukayo okuxhumana nokudla, okuvimbela ukusetshenziswa ngokweqile kwezithasiselo ekubangeni izingozi zokuphepha ezingaba khona.
Izindinganiso Zokuhambisana Nokuxhumana Nokudla ze-EU kanye Nezidingo Ezisebenzayo
I-EU yamukela uhlelo lokuthobela imithetho oluqinile noluphelele kakhuluiziqinisi ze-PVC zezinga lokudla, egxile emithethweni ye-EU 10/2011 yezinto zokuxhumana zokudla kwepulasitiki, ehambisana nezinhlinzeko ezivimbelayo ze-REACH kanye ne-RoHS. Uma kuqhathaniswa nezindinganiso ze-FDA, imithetho ye-EU ibeka imikhawulo eqinile ezinsaleleni zensimbi esindayo kanye nokufuduka kwezinto ezilandelanayo, okuba umkhawulo oyinhloko wokufinyelela emakethe yaseYurophu ephezulu.
Ukuhlolwa kokuhambisana ne-EU kugxile ezicini ezimbili eziyinhloko: ukufuduka okuphelele kanye nokufuduka kwezidakamizwa ezithile. Inani eliphelele lokufuduka kwezithambisi ngaphansi kwezimo zokusetshenziswa ngokweqile akumele lidlule umkhawulo ojwayelekile, futhi izinto ezinqunyelwe njenge-phthalate plasticizers kanye nama-residual toxic monomers kuma-stabilizers kumele ahlangabezane nezimfuneko zohlu lwabafakizicelo be-REACH. Kumapayipi eziphuzo e-PVC kanye nezinto zokupakisha ukudla ezithatha umjikelezo omude, i-EU idinga ukuhlolwa kokufuduka okusheshisiwe ukuze kuqinisekiswe ukuzinza kwezithambisi ngesikhathi senkonzo yesikhathi eside.
Kuyafaneleka ukuqaphela ukuthi amasiko e-EU kanye nokuphathwa kwemakethe kwenza amasampula angahleliwe ezithasiselo zezinto zokusetshenziswa ngaphezu kokuhlolwa komkhiqizo oqediwe. Ngisho noma imikhiqizo eqediwe iphumelela ukuhlolwa, amaqoqo okuqinisa angafaneleki azoholela ekubuyiselweni komkhiqizo kanye namarekhodi okufaneleka kwabaphakeli, okuletha imiphumela emibi yesikhathi eside ebhizinisini lokuthumela kwamanye amazwe.
Umehluko Obalulekile Wokuthobela Imithetho kanye Neseluleko Esisebenzayo Sokukhetha
Iningi labakhiqizi lidida amazinga e-FDA kanye ne-EU, okuholela ekuhlolweni okungadingekile noma ukuthobela imithetho enganele. Emisebenzini yangempela yokuthumela kwamanye amazwe, ukuthobela imithetho yemakethe yase-US kugxile ekubeni semthethweni kwefomula kanye nokuvinjelwa okuyisisekelo kwezinsimbi ezisindayo, kuyilapho izimakethe ze-EU zigcizelela ukulawulwa kwezidakamizwa ezilandelanayo kanye nokuqinisekiswa kokuzinza kwesikhathi eside.
Kubakhiqizi abathumela kwamanye amazwe kuzo zombili izimakethe, ukusebenzisa iziqinisi ze-PVC eziqinisekisiwe kabili kuyisisombululo esingabizi kakhulu.Isiqinisi se-calcium zinc esifanelekileImikhiqizo ingahlangabezana ngokugcwele nezindinganiso ze-FDA 21 CFR kanye ne-EU 10/2011, ezinezici ezingenayo insimbi esindayo, ukufuduka okuphansi, kanye nezici zokuzinza okuphezulu. Ukuze kukhiqizwe ifilimu yokunamathela esobala kakhulu, kunconywa iziqinisi zokudla ezenziwe ngokwezifiso ukuze kugwenywe amaphuzu ekristalu kanye nemvula ngenkathi kuqinisekiswa ukuhambisana. Ngezinto ze-PVC zamapayipi eziphuzo, amafomula okuqiniswa okushisayo okuphezulu kanye nesikhathi eside okulwa nokufuduka kufanele abekwe phambili ukuze azivumelanise nezimo zokuxhumana kwamanzi okuqhubekayo.
Iphutha elivame kakhulu lokuthobela imithetho embonini ukugxila kuphela emibikweni yokuhlolwa komkhiqizo oqediwe ngenkathi kunganakwa isitifiketi sezinto zokusetshenziswa eziqinisiwe. Iziqinisiwe eziningi ezingafaneleki zihlangabezana nezinkomba eziyisisekelo zomzimba kodwa ziyahluleka ukulandela ukuhlolwa kokufuduka, okuba yimbangela efihliwe yokwenqatshwa kokuthunyelwa kwamanye amazwe. Ukubuyekezwa kweziqu zomhlinzeki njalo kanye nokuhlolwa kwesampula ye-batch yezinto zokusetshenziswa kuyizixhumanisi ezibalulekile zokuqinisa ikhwalithi yokuhambisana.
imibuzo ejwayelekile ukubuzwa
1. Ingabe iziqinisi ze-PVC zezinga lokudla ziyahambisana nemithetho yomhlaba wonke ezimakethe zase-US nase-EU?
Akuzona zonke imikhiqizo yomhlaba wonke ezisekela ukufinyelela emakethe amabili. Ezinye izinto eziqinisayo zihlangabezana nezindinganiso ze-FDA eziyisisekelo kuphela kodwa zehluleka ukufuduka okuqinile kwe-EU kanye nokuhlolwa kwezidakamizwa okunqunyelwe. Kuyadingeka ukukhetha izinto eziqinisayo eziqinisekiswe ngokusobala ukuthi zihambisana ne-FDA 21 CFR kanye ne-EU 10/2011.
2. Ingabe amafilimu e-PVC okunamathela kanye nokupakishwa kokudla kudinga amafomula ahlukene okuzinzisa?
Yebo. Amafilimu e-Cling adinga iziqinisi ezihlanzekile kakhulu, ezisobala kakhulu ezinemikhawulo eqinile ezinhlayiyeni zemvula ukuqinisekisa ukucaca kwendawo kanye nokuphepha kokuxhumana nokudla. Izinto ezijwayelekile zokupakisha ukudla ze-PVC zibeka phambili ukuzinza okulinganiselayo kanye nokulawulwa kwezindleko ngezidingo zokucaca ezikhululekile.
3. Kungani imikhiqizo eqediwe efanelekile isahluleka ukuhlolwa kwemakethe ye-EU?
Ukuphathwa kwe-EU kulandelela izingozi zokuphepha ezithasiselweni zezinto zokusetshenziswa. Ukufaneleka komkhiqizo oqediwe akukwazi ukumboza izingozi zokungalandeli imithetho yesiqinisi. Izinsalela zesiqinisi ezingafaneleki kanye nokufuduka kokulandelela kuzobangela ukwehluleka kokuhlolwa noma ngabe izinkomba zomkhiqizo oqediwe zivamile.
4. Ingabe iziqinisi ze-calcium zinc ziphephile ngokuphelele emikhiqizweni ye-PVC ethinta ukudla?
Iziqinisi ze-calcium zinc zezinga lokudla ezivunyiwe yi-FDA kanye ne-EU azinabo ubuthi futhi ziyavumelana nemithetho, zifanelekela zonke izimo ze-PVC zokuthintana nokudla. Iziqinisi ze-calcium zinc zezinga lezimboni ziqukethe izinsalela zokungcola futhi azivunyelwe ngokuphelele ukusetshenziswa kokuthintana nokudla.
5. Abakhiqizi kufanele bavuselele kangaki imibiko yokuhlola ukuhambisana nomthetho we-stabilizer?
Imithetho yokuxhumana kokudla ye-EU ne-US iphindaphindwa ngokungajwayelekile. Kunconywa ukubuyekeza imibiko yokuthobela imithetho yezinto zokusetshenziswa njalo eminyakeni eyi-1-2 bese kwenziwa ukuhlolwa kokuthatha amasampula ebhetshini lamabhetshi amasha okukhiqiza ukuze kugwenywe ukwehluleka kokuthobela imithetho okubangelwa izibuyekezo ezijwayelekile noma ukulungiswa kwefomula.
Isikhathi sokuthunyelwe: Agasti-03-2026