Emkhakheni oguquguqukayo wokupakisha ukudla, lapho ukuphepha, ukwandiswa kwesikhathi sokuphila eshalofini, kanye nobuqotho bomkhiqizo kuhlangana khona, izinto zokuqinisa uketshezi ziye zavela njengamaqhawe angadunyiswanga. Lezi zithasiselo, ezenzelwe ngokucophelela amafilimu okudla, zidlala indima enezici eziningi ezibalulekile empilweni yabathengi kanye nokusebenza kahle kwezimboni. Ake sihlolisise imisebenzi emine eyinhloko eyenza izinto zokuqinisa uketshezi zibe yinto ebalulekile ekupakisheni ukudla kwanamuhla.
Ukuqina Kokushisa: Amafilimu Okuvikela Ekushisweni Okubangelwa UkushisaUkuwohloka
Amafilimu ebanga lokudla, kungaba yi-polyethylene (PE) noma i-polypropylene (PP), acutshungulwa ngokushisa okuphezulu (isb., ukukhishwa, ukubumba) afinyelela ku-230°C.Iziqinisi zoketshezizisebenza njengabavikeli bokushisa, zibamba ama-free radical akhiqizwa ngesikhathi sokushisa. Ucwaningo olwenziwe yi-Institute of Packaging Technologies luthole ukuthi ngaphandle kweziqinisi, amasampula efilimu abonise ukwehla okungu-35% kwamandla okudonsa ngemva kwemizuzu eyi-10 ku-200°C. Ngokuphambene nalokho,amafilimu ane-liquid stabilizer elungiselelwe kahleamafomula agcinwe ngaphezu kwama-90% wamandla awo okuqala, okuqinisekisa ubuqotho besakhiwo ngesikhathi sokupheka njengamathileyi okudla angafakwa kuma-microwave.
Ukwandisa Isikhathi Sokuphila Seshelufu: Ukunciphisa Ukubola Kwe-Oxidation kanye Nokubola Kwe-UV
Ngaphandle kokucubungula, iziqinisi zoketshezi zilwa nezingcindezi zemvelo ngesikhathi sokugcina nokuthuthwa. Imisebe ye-UV kanye nokuvezwa komoya-mpilo kungabangela ukushiswa kwe-photo, okubangela amafilimu abe phuzi futhi aqhekeke. Isibonelo, esivivinyweni sokuqhathanisa sokupakisha ama-potato chip, amafilimu anezithasiselo zoketshezi eziqinisa i-UV andise ubusha bomkhiqizo ngo-25%, njengoba kulinganiswa ngenani le-peroxide. Ama-antioxidants asekelwe ku-fatty acid kuma-liquid stabilizer akhipha umoya-mpilo, kuyilapho iziqinisi ze-UV ezifana ne-benzotriazoles zivikela amafilimu ekulimaleni kwemisebe, zilondoloza kokubili ukubukeka kobuhle bephakheji kanye nenani lokudla okunomsoco.
UkucutshungulwaUkuthuthukiswa: Ukuthuthukisa Ukugeleza Kokuncibilika kanyeUkufana
Abakhiqizi babhekene nezinselelo zokufinyelela ukujiya kwefilimu okufanayo kanye nokuphela kwendawo. Iziqinisi zoketshezi zinciphisa ukujiya okuncibilikayo ngamaphesenti afinyelela ku-18, ngokusho kwemibiko yemboni, okuvumela ukuphuma okubushelelezi. Lokhu kuthuthukiswa kubaluleke kakhulu emigqeni yokukhiqiza esheshayo, lapho ukuhlukahluka kobukhulu obungu-0.1 mm kungaholela ekuchithekeni okukhulu. Ngokukhuthaza ukwenziwa kwepulasitiki okuqhubekayo, iziqinisi zinciphisa amaphutha afana nokushintshashintsha kobuso be-sharkskin kanye nobukhulu, okuholela ekongeni izindleko kanye nokukhiqiza okuthuthukisiwe.
Ukuthobela Imithetho: Ukuqinisekisa Ukuphepha Kokudla kanye NomthengiUkwethemba
Ukuphepha kwamafilimu ebanga lokudla kuncike ekulawulweni kokufuduka okungeziwe. Iziqinisi zoketshezi kumele zilandele imithetho eqinile, njenge-US FDA 21 CFR 178.2010 kanye ne-EU Regulation (EC) No 10/2011. Isibonelo,iziqinisi ezihlanganisiwe ze-calcium-zinc, eziqinisekiswe njengezindlela ezingezona ezinobuthi esikhundleni samakhemikhali endabuko asekelwe ku-lead, zihambisana nezindinganiso zomhlaba wonke zokuthintana kokudla. Amazinga azo okufuduka aphansi (≤0.1 ppm yezinsimbi ezisindayo) azenza zilungele ukupakishwa kokudla kwezingane, lapho imingcele yokuphepha ibaluleke kakhulu.
Isimo Sesikhathi Esizayo: Ubuchwepheshe Bokuzinza
Imboni ibona ukushintshela ekuqiniseni uketshezi olusekelwe ku-bio. Uwoyela wesoya ofakwe i-epoxidized, otholakala ezinsizeni ezivuselelekayo, manje uhlanganisa u-30% wesabelo semakethe yesiqiniseko esinobungani nemvelo. Abacwaningi bahlola futhi izindlela eziningi zokuhlanganisa ukuzinza nezakhiwo ezisebenzayo, njengamakhono okulwa namagciwane. Lokhu kuthuthuka kuthembisa ukuchaza kabusha amazinga okuphepha nokusimama kokupakisha ukudla.
Ekuphetheni, izinto eziqinisa uketshezi akuzona nje izithasiselo kodwa yizinto ezibalulekile ezivikela ubuqotho bokudla, zilula ukukhiqizwa, futhi zigcine ukuthobela imithetho. Njengoba isidingo sabathengi sokupakisha okuphephile nokuhlala isikhathi eside sikhula, lezi zinhlanganisela eziguquguqukayo zizoqhubeka nokukhula, ziqhubekisele phambili ukusungula izinto ezintsha ohlelweni lokupakisha ukudla.
Isikhathi sokuthunyelwe: Julayi-31-2025