Ngokudla kwezilwane ezifuywayo ezimbalwa okungena emakethe, ukudla kwezilwane bekulokhu kungenye yezimboni ezincintisana kakhulu.
Izindlela ezinokwethenjelwa ziya ngokuya zidingeka ukuze kuqinisekiswe futhi kunwetshwe impilo yeshalofu yokudla kwezilwane ezifuywayo.
Njengokudla kwabantu, ukudla kwezilwane ezifuywayo kufanele kuqinisekise ukuthi kuhlangabezana nempilo nempilo yesilwane esifuywayo.
Ngakho-ke, ukudla kwezilwane ezifuywayo kufanele kulondoloze umsoco odingekayo kanye nokunambitheka kwangempela ngaphakathi kokulethwa, ukugcinwa kanye nempilo yeshalofu.
Ama-preservatives asesetshenziswe amakhulu eminyaka.
Bangase babe.
Ama-microbial preservatives avimbela ukukhula kwamagciwane kanye nesikhunta, noma ama-antioxidants avimbela i-oxidation yezithako zokudla, njengama-absorber komoya-mpilo. I-anti-
Ama-microbial preservatives afaka i-C-calcium, i-sodium nitrate, i-nitrite, ne-sulfuric acid (
I-sulfur dioxide, i-sodium bisultan, i-potassium bisultan, njll.)
Futhi disodium.
Ama-Antioxidants afaka i-BHA ne-BHT.
Izivimbelakuvunda zokudla zihlukaniswe zibe: izilondolozi zemvelo ezifana nosawoti, ushukela, uviniga, isiraphu, izinongo, uju, amafutha adliwayo, njll;
Futhi izilondolozi zamakhemikhali ezifana nesodium noma i-potassium, i-sulfate, i-glutamate, i-gan grease, njll.
Nokho, imiphumela engemihle yezivimbelakuvunda zokwenziwa ekudleni kwezilwane ezifuywayo mibi kakhulu kunezilondolozi zemvelo.
Mayelana nohlobo kanye nenani elingeziwe ekudleni kwezilwane ezifuywayo, kunemithetho eqinile eqinile.
Kuya ngokuya kuba nzima ukuthi abakhiqizi bathembele kuma-preservatives ukuqinisekisa impilo yeshalofu.
Ukusetshenziswa kwezinto ezivimbelayo eziphezulu njengokupakishwa kokudla kwezilwane ezifuywayo nakho kuyasiza kakhulu ekuqinisekiseni nokwandisa impilo yeshalofu yokudla kwezilwane ezifuywayo.
Kuyaziwa ukuthi ukukhula kwama-microorganisms kudinga indawo efanelekile.
Izinga lokushisa, umoya-mpilo kanye namanzi yizinto ezintathu ezibaluleke kakhulu.
Umoya-mpilo uyimbangela eyinhloko yokubola kokudla.
Uma kungena umoya-mpilo omncane ephaketheni lokudla, mancane amathuba okuthi ukudla kuzobola.
Nakuba amanzi enikeza imvelo ephilayo yama-microorganisms, angakwazi futhi ukusheshisa ukuncishiswa kwamafutha;
Nciphisa impilo yeshalofu yokudla kwezilwane ezifuywayo.
Ngesikhathi seshalofu lokudla kwezilwane ezifuywayo, umoya-mpilo kanye nomhwamuko wamanzi ephaketheni kufanele kugcinwe kugcwaliswe ngaphambili.
I-Permeability yikhono lokulinganisa igesi evunyelwe yizinto ezivimbelayo (
O2, N2, CO2, umhwamuko wamanzi, njll. )
Ngena kuwo ngesikhathi esithile.
Ngokuvamile kuncike ohlotsheni, ingcindezi, izinga lokushisa nokushuba kwezinto.
Kulebhu ye-Labthink, sihlole, sahlaziya kanye ne-OPP/PE/CPP, izinga lokudlulisa umoya-mpilo kanye nezinga lokudlulisa umhwamuko wamanzi we-7 evame ukusetshenziswa esetshenziselwa ukudla kwezilwane ezifuywayo i-PET, i-CPP yesilwane, i-Bopp/CPP, i-BOPET/PE/VMPET/dlp.
Izinga eliphezulu lokungena komoyampilo lisho ukuthi ukungenwa komoyampilo wezinto ezibonakalayo kunciphisa;
Izinga eliphezulu lokudluliswa komhwamuko lisho ukuthi umhwamuko wamanzi ongangenisi wempahla uphansi.
Ukuhlolwa kokulethwa komoyampilo kusebenzisa uhlelo lokuhlola izinga lokulethwa komoyampilo we-Labthink OX2/230, indlela yokucindezela elinganayo.
Beka isampula endaweni ejwayelekile ngaphambi kokuhlolwa (23±2℃,50%RH)
Amahora angu-48, ibhalansi yomoya ebusweni besampula.
Ukuhlolwa kwezinga lokudluliswa komhwamuko kusebenzisa isihloli sezinga lokudluliswa komhwamuko wamanzi we-Labthink/030 kanye nendlela yendebe evamile.
Imininingwane enemininingwane ye-OTR ne-WVTR imiphumela yalezi zinto zokupakisha eziyi-7 imi kanje: imiphumela yokuhlolwa eyisampula OTR (ml/m2/usuku）WVTR (g/m2/24h)PET/CPP 0. 895 0.
667 BOPP/CPP 601. 725 3. 061 PET 109. 767 25.
BOPET/PE 85 163. 055 4.
632 OPP/PE/CPP 716. 226 2.
214 BOPET/VMPET/hdpe 0. 149 0. 474 Aluminium-plastic 0. 282 0.
187 Ithebula 1 kusukela ekuhlaziyweni kwemiphumela yokuhlolwa yalezi zinto eziyisi-7 zokupakisha, idatha yokuhlola yokungena kokupakishwa kokudla kwezilwane ezifuywayo ingatholakala, futhi singathola ukuthi izinto ezihlukene ezinamalayili zizoba nomehluko omkhulu ekungeneni komoyampilo.
Kusukela kuThebula 1, i-aluminium-
Amazinga okudlulisa umoya-mpilo wezinto zepulasitiki, i-BOPET/VMPET/dlp, i-PET/CPP aphansi uma kuqhathaniswa.
Ngokocwaningo lwethu, ukudla kwezilwane ezifuywayo kuleli phakethe kuvame ukuba neshelufu ende.
Ifilimu ene-laminated inokusebenza okuhle ekuvimbeleni umhwamuko wamanzi.
Bheka esithombeni esingezansi, i-PET inezinga eliphezulu lokudlulisa umhwamuko wamanzi, okusho ukuthi umgoqo wayo womhwamuko wamanzi usebenza kabi futhi awufanele ukupakishwa kokudla kwe-PET ngoba uzofinyeza impilo yeshalofu yokudla kwe-PET.
Abakhiqizi bokudla kwezilwane ezifuywayo bangasebenzisa izinto ezivimbelayo eziphezulu esikhundleni sezilondolozi ezengeziwe ukuze bandise impilo yeshalofu yokudla kwezilwane ezifuywayo.
Sincoma ipulasitiki elaminate, i-aluminium-
Izinto zepulasitiki nezensimbi zipakishwa njengokudla kwezilwane ezifuywayo ngoba zonke zinesithiyo esihle kumoya-mpilo kanye nomhwamuko wamanzi.
Ngaphezu kokucabangela izakhiwo ze-oksijini nomhwamuko wamanzi wezinto ezibonakalayo, kufanele futhi sazi ukuthi imvelo inethonya elithile kulezi zakhiwo zezinto.
Njenge-EVOH ne-PA, azwela kakhulu kumswakama.
Ezingeni lokushisa legumbi kanye nomswakama ophansi uma kuqhathaniswa, kokubili kunomphumela omuhle wokuvinjwa kumusi wamanzi, kuyilapho ukufinyeleleka kwawo komhwamuko kuncipha ezindaweni ezinomswakama ophezulu.
Ngakho-ke, i-EVOH ne-PA azifanelekile ukupakishwa uma kunendawo enomswakama ophezulu ngesikhathi sokuthutha nokugcinwa kokudla kwezilwane ezifuywayo.
