Nezvishoma zvekudya zvezvipfuyo zvinopinda mumusika, chikafu chezvipfuyo chagara chiri chimwe chemakambani anokwikwidza.
Nzira dzakavimbika dziri kuwedzera kudiwa kuti ive nechokwadi uye nekuwedzera hupenyu hwesherufu hwechikafu chemhuka.
Kufanana nechikafu chevanhu, chikafu chemhuka chinofanirwa kuve nechokwadi chekuti chinosangana nehupenyu uye hutano hwechipfuwo.
Naizvozvo, chikafu chemhuka chinofanirwa kuchengetedza chikafu chinodiwa uye kuravira kwepakutanga mukati mekutakura, kuchengetedza uye hupenyu hwesherufu.
Preservatives yakashandiswa kwemazana emakore.
Vanogona kunge vari.
Microbial preservatives iyo inodzivisa kukura kwebhakitiriya uye fungi, kana antioxidants inodzivisa kusvibiswa kwezvokudya zvekudya, zvakadai sezviputi zveokisijeni. Common anti-
Microbial preservatives inosanganisira C- calcium, sodium nitrate, nitrite, uye sulfuric acid (
Sulfur dioxide, sodium bisultan, potassium bisultan, nezvimwewo)
Uye disodium.
Antioxidants zvinosanganisira BHA uye BHT.
Zvokudya zvekuchengetedza zvakakamurwa kuva: zvisikwa zvekuchengetedza zvakadai semunyu, shuga, vhiniga, sirasi, zvinonhuwira, uchi, mafuta anodyiwa, nezvimwewo;
Uye makemikari anochengetedza akadai sodium kana potasium, sulfate, glutamate, gan grisi, nezvimwe.
Zvisinei, migumisiro yemigumisiro yezvidziviriro zvekugadzira pazvokudya zvezvipfuwo zvakakomba kupfuura zvinochengetedza zvakasikwa.
Maererano nemhando uye huwandu hwakawedzerwa kune chikafu chemhuka, kune mitemo inowedzera yakasimba.
Zviri kuramba zvichiomera kuti vagadziri vavimbe nezvinochengetedza kuchengetedza hupenyu hwesherufu.
Iko kushandiswa kwezvinhu zvakakwirira zvipingamupinyi sekurongedza chikafu chemhuka kunobatsirawo zvakanyanya kuve nechokwadi uye kuwedzera hupenyu hwesherufu yechikafu chemhuka.
Zvinonyatsozivikanwa kuti kukura kwema microorganisms kunoda nzvimbo yakakodzera.
Tembiricha, okisijeni nemvura ndizvo zvinhu zvitatu zvakakosha.
Oxygen ndiyo inonyanya kukonzera kuora kwezvokudya.
Iyo oxygen shoma iri mupasuru yezvokudya, kashoma kuti chikafu chiwore.
Nepo mvura ichipa nharaunda yekugara kune tupukanana, inogona zvakare kukurumidza kuderedzwa kwemafuta;
Kupfupisa hupenyu hwesherufu hwechikafu chemhuka.
Munguva yehupenyu hwesherufu hwechikafu chemhuka, oxygen uye mhute yemvura mupakeji inofanira kuchengetwa isati yazadzwa.
Permeability ndiko kugona kuyera gasi rinobvumidzwa nezvivhariso zvinhu (
O2, N2, CO2, mhute yemvura, nezvimwewo)
Pinda mariri panguva yakatarwa.
Zvinowanzoenderana nemhando, kumanikidza, tembiricha uye ukobvu hwezvinhu.
MuLabthink lab, takaedza, takaongorora uye OPP/PE/CPP, mwero wekufambisa okisijeni uye mwero wekufambisa kwemhepo ye7 inowanzoshandiswa pet chikafu packaging PET, pet CPP, Bopp / CPP, BOPET/PE/ VMPET/dlp.
High oxygen permeability rate inoreva kuti zvinhu oksijeni permeability zvinodzikira;
Iyo yakakwirira yemvura mhute yekufambisa mwero inoreva kuti mhute yemvura permeability yechinhu chakaderera.
Iyo okisijeni yekuendesa bvunzo inotora iyo Labthink OX2/230 okisijeni yekuendesa chiyero chekuyedza system, yakaenzana nzira yekumanikidza.
Isa muenzaniso munzvimbo yakajairika usati waedzwa (23 ± 2 ℃, 50% RH)
Kwemaawa makumi mana nemasere, chiyero chemhepo chiri pamusoro peiyo sampuli.
Iyo mvura vapor transmission rate bvunzo inoshandisa iyo Labthink/030 mvura vapor transmission rate tester uye yechinyakare Cup Cup.
Iwo akadzama OTR uye WVTR bvunzo mhedzisiro yezvi 7 zvekurongedza zvinhu ndeiyi: sampuli bvunzo mhinduro OTR (ml/m2/zuva）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-plastiki 0. 282 0.
187 Tafura 1 kubva pakuongororwa kwemhedzisiro yebvunzo yeaya 7 ekurongedza zvinhu, iyo bvunzo yedata yepermeability yePet chikafu chekurongedza inogona kuwanikwa, uye isu tinogona kuona kuti akasiyana laminated zvinhu zvichave nekusiyana kwakakura mukugoneka kweokisijeni.
Kubva Tafura 1, aluminium-
Oxygen kutamisa mitengo yezvinhu zvepurasitiki, BOPET/VMPET/dlp, PET/CPP zvakaderera.
Zvinoenderana netsvagiridzo yedu, chikafu chemhuka mupakeji iyi kazhinji chine hupenyu hwakareba.
Laminated film ine basa rakanaka mukudzivirira mhute yemvura.
Tarisa kumufananidzo uri pazasi, PET ine yakakwira mhute yekufambisa mwero, izvo zvinoreva kuti iyo mhute yemvura inovharira haina kuita zvakanaka uye haina kukodzera kurongedza chikafu chePET nekuti inopfupisa hupenyu hwesherufu yePET chikafu.
Vagadziri vechikafu chezvipfuyo vanogona kushandisa yakakwira chipingamupinyi zvinhu panzvimbo pezvimwe zvinodzivirira kuwedzera hupenyu hwesherufu hwechikafu chemhuka.
Isu tinokurudzira plastiki yakashongedzwa, aluminium-
Zvigadzirwa zvepurasitiki nesimbi zvakaputirwa sechikafu chemhuka nekuti zvese zvine chipingamupinyi chakanaka kuokisijeni nemhute yemvura.
Pamusoro pekutarisa iyo okisijeni uye mvura mhute permeability zvimiro zvechinyorwa, isu tinofanirawo kuziva kuti nharaunda ine imwe pesvedzero pazvinhu izvi zvechinyorwa.
Kufanana neEVOH nePA, ivo vanonyanya kufunga nezvehunyoro.
Patembiricha yemumba uye hunyoro hushoma, zvese zvine chivharo chakanaka pamhute yemvura, nepo mhute yemvura yadzo inodzikira munzvimbo dzakanyanya hunyoro.
Naizvozvo, EVOH nePA haina kukodzera kurongedza kana paine yakakwira humidity nharaunda panguva yekutakura chikafu chemhuka uye kugadzirisa.
