Iziqhamo ezitsha kunye nemifuno zihlala ziphila emva kokuba zivuthwe, ziqhubeka nokuphefumla kunye nokwenza imisebenzi enzima yokuphila. Kwelinye icala, i-metabolism yokuphefumla itya izondlo kunye namanzi eziqhamo kunye nemifuno, echaphazela inkangeleko kunye nomgangatho wazo; kwelinye icala, ukusuleleka nge-pathogenic microorganisms kunokubangela ukuba iziqhamo kunye nemifuno zibole. Ngoko ke, iziqhamo kunye nemifuno emitsha zihlala zibuna, ziyancipha umgangatho, kwaye zibole ngexesha lokugcinwa, ukuthuthwa kunye nokuthengisa, ngaloo ndlela kunciphisa ixabiso lokutya kwazo.
Ukupakishwa okulungileyo akuncedi kuphela ukugcina iziqhamo ezitsha kunye nemifuno, ukunciphisa ukonakala kunye nokwandisa ubomi beshelufu, kodwa kutsala abathengi kwaye kukhuthaze ukusetyenziswa kwemveliso. Ifilimu yePlastiki okwangoku yeyona nto isetyenziswa kakhulu ekupakisheni iziqhamo kunye nemifuno. Ineengenelo ezifana nokungafihli, ukugquma ubushushu, ukuphefumla, ukutywina, kunye nexabiso eliphantsi, kwaye inamathemba osetyenziso olubanzi lwemarike. Oku kulandelayo kuza kwazisa iindlela zokugcina iziqhamo nemifuno.
-ubuninzi beengxowa zepolyethylene ezincinci
Kwiminyaka yakutshanje, le nto yokupakisha isetyenziswe ngokubanzi kumazwe angaphandle ukupakisha iziqhamo ezitsha. Ngokusekelwe kwiimpawu ze-physiological zeziqhamo kunye nokunyamezela kwabo kwi-oksijini kunye ne-carbon dioxide concentrations, inani elithile le-micropores (40μm) linokongezwa kwisikhwama sefilimu ukuphucula ukutshintshiselana kwegesi, ukunciphisa umswakama kunye ne-metabolites eguquguqukayo ngaphakathi kwesikhwama, kunye nokugcina ugxininiso lwe-oksijini ngaphakathi kwesikhwama kwinqanaba eliphezulu.<1% O2). This prevents excessive oxygen concentration from causing anaerobic respiration, thereby avoiding the accumulation of large amounts of volatile substances such as ethanol and acetaldehyde, which would affect the flavor of the fruit. The oxygen concentration inside the film bag can generally be maintained at around 10-15%, and it is highly tolerant of carbon dioxide concentration, making it especially suitable for fruits and vegetables with high humidity, particularly tropical fruits. In other countries, these packaging bags are used to store "frozen" cherries, which can be preserved for 80 days in ordinary cold storage while maintaining the flavor and quality of the fruit.
Ipakethe-ephezulu eguqulwe ngeoksijini
Luhlobo olutsha lwendlela yokupakisha eye yavela kwiminyaka yakutshanje. Isiqulatho seoksijini ephezulu{1}}kwi-oxygen self{2}}iingxowa zekloriniti zihlala zigcinwa ku-70-100%. Le phakheji ineenzuzo ezilandelayo: (1) inqanda umsebenzi we-enzyme kwaye inqande ukubola kweziqhamo kunye nemveliso yemifuno; (2) kuthintela ukuphefumla kweanaerobic kunye nokugcina umgangatho weziqhamo kunye neemveliso zemifuno; (3) inqanda ngokufanelekileyo ukukhula kwe-aerobic kunye ne-anaerobic ye-microorganisms kwaye inqande ukubola, kwaye ngoko ke iye yatsala ingqalelo enkulu. Kufanelekile ngokukhethekileyo ukugcinwa kweziqhamo ezitsha kunye nemifuno kunye neziqhamo ezitsha kunye nemifuno ehambelana nokuphefumula kwe-anaerobic kunye ne-fermentation phantsi kwe-carbon dioxide concentration kunye ne-oxygen ephantsi. Ngelo xesha, umlinganiselo odibeneyo weegesi ngaphakathi kwesikhwama unqunywe ngokweempawu zeziqhamo ezahlukeneyo kunye nemifuno.
Imathiriyeli entsha yokupakisha enokubola
Ngenxa yenkxalabo yokuba ukusetyenziswa kwexesha elide -kwezibulali-ntsholongwane zemichiza kuyakwenzakalisa impilo yabantu kwaye kungcolise indalo esingqongileyo, kudityaniswa nemfuno eyandayo yokupakishwa kwefilimu yeplastiki kunye nengxaki ekhulayo "yongcoliseko olumhlophe," iimfuno zokusebenza zabantu zezixhobo zokupakisha ziye zatshintshela kukhuseleko,-kunobutyhefu, kunye nobuhlobo bendalo. Imathiriyeli entsha yokupakishwa kwebhayoloji yinto entsha eshushu kwindawo yokupakisha ukutya yamazwe ngamazwe. Isebenzisa iintlobo ngeentlobo zezixhobo zepolymer ezibolayo kwaye yongeza i-biological bactericides, idibanisa imisebenzi emininzi efana nokugcinwa, ukuthotywa kunye nokukhuselwa kwendalo. Le mathiriyeli yokupakisha kulula ukuyisebenzisa, ngakumbi ilungele ukupakisha{5}iziqhamo ezisikiweyo kunye nemifuno kunye nokutya okuphekiweyo, kwaye inethuba elibanzi lokusebenzisa kwindawo yokupakisha ukutya okutsha kwixesha elizayo.
