Ucwaningo lwesayensimayelana nokukhiqizwa, ikhwalithi kanye nokusetshenziswa okungenzeka kwamafilimu adliwayo/abolayo ekukhiqizeni ukudla kuye kwenziwa amaqembu amaningana ocwaningo emhlabeni wonke futhi kubikwe ezincwadini zocwaningo.5-9.Amandla amakhulu okuhweba kanye nemvelo endaweni yamafilimu/izingubo ezidliwayo/ezibolayo okubolayo sekuye kwagcizelelwa.5,10,11kanye nokushicilelwa okuningi kuye kwakhuluma ngokuyinhloko ngezindaba eziphathelene nezakhiwo zemishini, ukufuduka kwegesi, kanye nemiphumela yezinye izici kulezi zakhiwo, njengohlobo nokuqukethwe kwama-plasticisers, i-pH, umswakama ohlobene nezinga lokushisa njll.6, 8, 10-15.
Nokho,ucwaningo ngamafilimu adliwayo/abolayoluseluncane futhi ucwaningo mayelana nokusetshenziswa kwezimboni kwamafilimu adliwayo/abolayo seluthole ukunakwa okwengeziwe eminyakeni yamuva nje, nokho, ukuvezwa kusenomkhawulo impela.
Abacwaningi kui-Food Packaging Group, Umnyango Wezokudla Nesayensi Yezokudla, i-University College Cork, e-Ireland, ithuthukise amafilimu amaningana asebenzayo, asekelwe ku-biopolymer, adlekayo/abolayo eminyakeni embalwa edlule.
Imikhawulo yokupakishwa okudliwayo
Ngokuvamile, amafilimu adliwayo anokusebenza okulinganiselwe ngokuyinhloko ngenxa yezici zawo zomzimba eziphansi.Isibonelo, amafilimu angawodwa, asekelwe ku-lipid anezakhiwo ezinhle zokuvimbela umswakama kodwa awanawo amandla emishini23.Ngenxa yalokho, amafilimu ane-laminated akhiwa ngokunamathela amafilimu amabili noma ngaphezulu e-biopolymer ndawonye.Kodwa-ke, amafilimu ane-laminated anenzuzo kumafilimu e-biopolymer eyodwa, asuselwa ku-emulsion ngenxa yokuba nezindawo zokuvimbela ezithuthukisiwe.Ukwakhiwa kwezakhiwo ezinama-laminated kunamandla okunqoba lezi zinkinga ngonjiniyela amafilimu adliwayo/abolayo anezendlalelo eziningi zokusebenza.
Amafilimu adliwayo kanye nama-coatingsokusekelwe kumaprotheni ancibilikayo emanzini avame ukuncibilika emanzini ngokwawo kodwa anezinto ezinhle kakhulu zokuvimbela umoya-mpilo, i-lipid kanye ne-flavour.Amaprotheni asebenza njenge-matrix ehlangene, yesakhiwo ezinhlelweni zama-multicomponent, akhiqiza amafilimu kanye nezingubo ezinezakhiwo ezinhle zemishini.Ngakolunye uhlangothi, ama-lipids asebenza njengezithiyo ezinhle zomswakama, kodwa anezithiyo ezimbi zegesi, i-lipid ne-flavour.Ngokuhlanganisa amaprotheni nama-lipids ku-emulsion noma i-bilayer (ulwelwesi oluhlanganisa izingqimba ezimbili zamangqamuzana), izimfanelo ezinhle zazo zombili zingahlanganiswa futhi okubi kuncishiswe.
Kusukela ocwaningweni olwenziwe ngabakwaIqembu Lokupakisha Ukudlae-UCC, izici ezijwayelekile zamafilimu angadliwayo/abolayo athuthukile ami kanje:
- Ubukhulu bamafilimu akhiqiziwe adliwayo/abolayo asukela ku-25μm kuya ku-140μm
- Amafilimu angacaca, abe obala, futhi akhanye noma angabonakali kuye ngezithako ezisetshenzisiwe kanye nezindlela zokucubungula ezisetshenziswayo.
- Izinhlobo ezithile zefilimu ezigugayo ngaphansi kwezimo zemvelo ezilawulwayo zathuthukisa izakhiwo zemishini kanye nezakhiwo zokuvimbela igesi
- Ukugcina amafilimu esimweni se-ambient (18-23°C, 40- 65% RH) iminyaka emihlanu akuzange kushintshe kakhulu izici zesakhiwo.
- Amafilimu akhiwe ngezithako ezihlukahlukene angahlanganiswa kalula ngokulinganayo
- Amafilimu enziwe angabhalwa, aphrintwe kuwo noma afakwe uphawu lokushisa
- Ukwehluka okuncane kwe-microstructure yefilimu (isb. ukuhlukaniswa kwesigaba se-biopolymer) kuthinta izici zefilimu
Isikhathi sokuthumela: Mar-05-2021