Ukutya okukhenkcezisiweyo kubhekiselele kukutya apho imathiriyeli yokutya esemgangathweni icutshungulwa ngokufanelekileyo, ikhenkcezwe kubushushu obuyi-30℃, kwaye igcinwe kwaye ijikelezwe ku-18℃ okanye ngaphantsi emva kokupakishwa. Ngenxa yokusetyenziswa kwetsheyini ebandayo yobushushu obuphantsi kuyo yonke le nkqubo, ukutya okukhenkcezisiweyo kuneempawu zobomi obude beshelufu, akulula ukurhwaphiliza kwaye kulula ukuyitya, kodwa ikwabeka imingeni emikhulu kunye neemfuno eziphezulu zokupakisha izinto.
Izinto eziqhelekileyo zokupakisha ukutya okukhenkcezisiweyo
Okwangoku, eqhelekileyoiingxowa zokupakisha ezikhenkcezisiweyokwimarike ubukhulu becala yamkela olu lwakhiwo lwemathiriyeli lulandelayo:
1.PET/PE
Esi sakhiwo siqhelekile kwipakethe yokutya ekhawulezayo enomkhenkce, ubungqina bokufuma, ukuxhathisa ukubanda, ukusebenza kokutywinwa kobushushu obuphantsi kulungile, ixabiso liphantsi.
2. I-BOPP / PE, BOPP / CPP
Olu hlobo lolwakhiwo lububungqina bokufuma, luyamelana nokubanda, kwaye lunamandla okuqina aphezulu okutywinwa kobushushu obuphantsi kobushushu, nto leyo eyenza ukuba kungabizi kakhulu. Phakathi kwabo, i-BOPP / i-PE yokupakisha iingxowa zokupakisha zinembonakalo engcono kunye nokuvakalelwa kune-PET / PE isakhiwo, esinokuphucula ibakala lemveliso.
3. I-PET/VMPET/CPE, BOPP/VMPET/CPE
Ngenxa yobukho be-aluminiyam yokwaleka, olu hlobo lwesakhiwo lunomgangatho oshicilelwe kakuhle, kodwa ukusebenza kwawo kokutywinwa kobushushu obuphantsi kobushushu buphantsi kancinci kwaye ixabiso lalo liphezulu kakhulu, okukhokelela kumlinganiselo ophantsi wosetyenziso.
4. NY/PE, PET/NY/LLDPE, PET/NY/AL/PE,NY/PE
Ukupakishwa kolu hlobo lwesakhiwo kuchasene neqhwa kunye neempembelelo. Ngenxa yobukho bomaleko we-NY, inokumelana ne-puncture elungileyo, kodwa ixabiso liphezulu kakhulu. Ngokuqhelekileyo isetyenziselwa ukupakisha iimveliso ezinemiphetho okanye ubunzima obunzima.
Ukongeza, kukho olunye uhlobo lwengxowa ye-PE eqhele ukusetyenziswa njengengxowa yokupakisha yangaphandle yemifuno kunye nokutya okukhenkcezisiweyo okupakishweyo.
In Ukongeza, kukho ibhegi ye-PE elula, esetyenziswa ngokubanzi njengemifuno, iingxowa zokupakisha ukutya ezikhenkcezisiweyo, njl.
Ukongeza kwiingxowa zokupakisha, okunye ukutya okukhenkcezisiweyo kufuna ukusebenzisa itreyi yeplastiki, eyona nto isetyenziswa kakhulu kwitreyi yiPP, ucoceko lokutya lwePP lulungile, lunokusetyenziswa kubushushu obuphantsi kwe-30℃, kukho i-PET kunye nezinye izinto. Ibhokisi ebotshiweyo njengepakethe yezothutho jikelele, ukuxhathisa kukothuka, ukumelana noxinzelelo kunye neenzuzo zeendleko, luqwalaselo lokuqala lwezinto zokupakisha ezikhenkcezisiweyo zokupakisha.
Iingxaki ezimbini ezinkulu azinakuhoywa
1. ukutya okomileyo ukusetyenziswa, umkhenkce ukutshisa isenzeko
Ukugcinwa emkhenkceni kunokunciphisa kakhulu ukukhula kunye nokuzala kwakhona kwe-microorganisms, ukunciphisa izinga lokubola kokutya kunye nokonakala. Nangona kunjalo, kwiinkqubo ezithile zokugcina umkhenkce, ukomiswa kunye ne-oxidation phenomena yokutya iya kuba nzima ngakumbi ngokwandiswa kwexesha lokukhenkceza.
Kwisikhenkcisi, kukho ukusasazwa kobushushu kunye nomphunga wamanzi uxinzelelo oluyinxenye: umphezulu wokutya>umoya ojikelezileyo> opholileyo. Ngakolunye uhlangothi, oku kungenxa yokuba ukushisa okuphezu kokutya kudluliselwa kumoya ojikelezayo, ngakumbi ukunciphisa ubushushu bawo; Ngakolunye uhlangothi, ukuhlukana koxinzelelo lomphunga wamanzi phakathi kwendawo yokutya kunye nomoya ojikelezileyo kunokukhuthaza ukuvela kwamanzi kunye ne-sublimation yamanzi kunye neekristale zeqhwa kwindawo yokutya emoyeni.
Kweli nqanaba, umoya oqulethe umphunga wamanzi omninzi ufunxa ubushushu, unciphise ukuxinana kwawo, kwaye uhambe usiya emoyeni ngaphezu kwesikhenkcisi; Xa uqukuqela kwindawo epholileyo, ngenxa yobushushu obuphantsi kakhulu bendawo epholileyo, uxinzelelo lwamanzi azeleyo kwelo qondo lobushushu nalo luphantsi kakhulu. Njengoko umoya upholile, umphunga wamanzi udibana nomhlaba opholileyo kwaye ujike ube yiqabaka, nto leyo eyandisa ukuxinana komoya opholileyo kunye nezika kwaye udibana nokutya kwakhona. Le nkqubo iya kuqhubeka iphinda iphinde ijikeleze, kwaye amanzi aphezu kokutya aya kuqhubeka elahlekile, okubangela ukuhla kwesisindo. Le nto ibizwa ngokuba "ukusetyenziswa okomileyo".
Ngexesha lenkqubo eqhubekayo yokomisa isenzeko, umphezulu wokutya uya kuthi ngokuthe ngcembe ube sisicubu se-porous, ukwandisa indawo yokunxibelelana neoksijini, ukukhawulezisa i-oxidation yamafutha okutya kunye nee-pigments, okubangela umdaka kumphezulu kunye neprotein denaturation. Esi siganeko saziwa ngokuba yi "frozen burning".
Ngenxa yokuhanjiswa komphunga wamanzi kunye nokusabela kweoksijini emoyeni, ezizizizathu ezisisiseko zezi zinto zingasentla, izinto zokupakisha zeplastiki ezisetyenziswa kwipakethe yangaphakathi yokutya okunomkhenkce kufuneka zibe nomphunga olungileyo wamanzi kunye neempawu zokuthintela ioksijini njengesixhobo sokupakisha. umqobo phakathi kokutya okunomkhenkce kunye nelizwe langaphandle.
2. Isiphumo seNdawo yoGcino eMkhenkce kuMandla oomatshini bezinto zokuPakisha
Njengoko kusaziwa, iiplastiki ziba brittle kwaye zithambekele ekuqhekekeni xa zibekwe kumaqondo obushushu aphantsi ixesha elide, okukhokelela ekwehleni okukhulu kweempawu zomzimba. Oku kubonisa ubuthathaka bezinto zeplastiki ekuxhathiseni okubandayo okubandayo. Ngokuqhelekileyo, ukuchasana okubandayo kweeplastiki kubonakaliswa ngukushisa kwe-embrittlement. Njengoko iqondo lobushushu liyehla, iiplastiki ziba brittle kwaye zithambekele ekuqhekekeni ngenxa yokuncipha komsebenzi wamatyathanga eemolekyuli zepolymer. Ngaphantsi kwamandla empembelelo achaziweyo, i-50% yeeplastiki ifumana ukungaphumeleli kwe-brittle, kwaye lo bushushu bubushushu obunqabileyo, obungumlinganiselo ophantsi weqondo lokushisa apho izinto zeplastiki zinokusetyenziswa ngokuqhelekileyo. Ukuba izinto zokupakisha ezisetyenziselwa ukutya okunomkhenkce azikwazi ukumelana nokubanda, iipropusi ezibukhali zokutya okunomkhenkce zinokugqobhoza ngokulula ukupakisha ngexesha lokuthuthwa kwamva kunye nokulayisha kunye nokothula, okubangela iingxaki zokuvuza kunye nokukhawulezisa ukonakaliswa kokutya.
Izisombululo
Ukunciphisa ukuphindaphindeka kwale miba mibini iphambili ikhankanywe ngasentla nokuqinisekisa ukhuseleko lokutya okukhenkcezisiweyo, le miba ilandelayo inokuthathelwa ingqalelo.
1. Khetha umqobo ophezulu kunye nezixhobo zokupakisha zangaphakathi zamandla aphezulu
Kukho iintlobo ngeentlobo zezinto zokupakisha ezineempawu ezahlukeneyo. Kuphela ngokuqonda iimpawu ezibonakalayo zezinto ezahlukeneyo zokupakisha sinokukhetha izinto ezifanelekileyo ezisekelwe kwiimfuno zokukhusela ukutya okufriziwe, ukuze bakwazi ukugcina incasa kunye nomgangatho wokutya kwaye babonise ixabiso lemveliso.
Ngoku,ukupakishwa kweplastiki eguquguqukayoesetyenziswa kwintsimi yokutya okukhenkcezisiweyo yahlulwe kakhulu ibe ngamacandelo amathathu:
Uhlobo lokuqala luluhlu olulodwaiingxowa zokupakisha, ezifana neengxowa ze-PE, ezinesiphumo esibi sesithintelo kwaye ziqhele ukusetyenziswaukupakishwa kwemifuno, njl.
Uhlobo lwesibini luxutywe iingxowa zokupakisha zeplastiki ezithambileyo, ezisebenzisa izinto zokuncamathelisa ukudibanisa iileya ezimbini nangaphezulu zeplastiki yefilim yeplastiki kunye, njenge-OPP/LLDPE, NY/LLDPE, njl. ;
Uhlobo lwesithathu luyi-multi-layer co extruded soft packaging bags, enyibilikayo kwaye ikhuphe izinto ezahlukeneyo ezisebenzayo ezifana ne-PA, i-PE, i-PP, i-PET, i-EVOH, njl., kwaye idibanise kwi-main die. Zivuthelwa, zandiswe, kwaye zipholiswe kunye. Olu hlobo lwezinto eziphathekayo alusebenzisi i-adhesives, kwaye luneempawu zokungangcolisi, umqobo ophezulu, amandla aphezulu, kunye nokuchasana nokushisa okuphezulu kunye nokuphantsi.
Idatha ibonisa ukuba kumazwe aphuhlileyo kunye nemimandla, ukusetyenziswa kohlobo lwesithathu lwee-akhawunti zokupakisha malunga ne-40% yokupaka okupheleleyo kokutya okufriziwe, ngelixa e-China kuphela i-akhawunti malunga ne-6%, efuna ukukhuthazwa okungaphezulu.
Ngenkqubela phambili eqhubekayo yetekhnoloji, izixhobo ezitsha zikwavela enye emva kwenye, kwaye ifilimu epakishwayo etyiwayo ngomnye wabameli. Isebenzisa i-polysaccharides, iiprotheni, okanye i-lipids njenge-substrate, kwaye yenza ifilimu ekhuselayo kumphezulu wokutya okunomkhenkce ngokusonga, ukucwina, ukugquma, okanye ukutshiza, usebenzisa izinto ezidliwayo zendalo njengezinto eziluhlaza kunye nokusebenzisana kwe-intermolecular ukulawula ukuhanjiswa kwamanzi kunye ukungena kweoksijini. Le filimu inokuxhathisa okucacileyo kwamanzi kunye nokuchasana okunamandla kwegesi. Okona kubaluleke kakhulu, inokutyiwa ngokutya okunomkhenkce ngaphandle kongcoliseko kwaye inethuba elibanzi lokusetyenziswa.
2. Ukuphucula ukumelana nokubanda kunye namandla omatshini wezinto zokupakisha zangaphakathi
Indlela yoku-1:Khetha izinto ezidityanisiweyo ezifanelekileyo okanye ezidityanisiweyo.
Inayiloni, i-LLDPE, kunye ne-EVA zonke zinokuxhathisa ubushushu obuphantsi, ukuxhathisa kweenyembezi, kunye nokumelana nempembelelo. Ukongeza izinto ezikrwada ezinjalo kwiinkqubo ezidibeneyo okanye ze-co extrusion kunokuphucula ngokufanelekileyo ukungangeni kwamanzi, umqobo wegesi, kunye namandla omatshini wezinto zokupakisha.
Indlela yesi-2:Ukwandisa umlinganiselo weeplastiki ngokufanelekileyo.
IiPlastiki zisetyenziswa ikakhulu ukwenza buthathaka iibhondi zesibini phakathi kweemolekyuli zepolymer, ngaloo ndlela zinyusa ukushukuma kwamakhonkco emolekyuli epolymer kunye nokunciphisa ubukhazikhazi. Oku kubonakaliswa ngokuncipha kobulukhuni, imodyuli, kunye nobushushu bepolymer, kunye nokunyuka kobude kunye nokuguquguquka.
Yomeleza iinzame zokuhlola ukupakishwa
Ukupakishwa kubaluleke kakhulu ekutyeni okukhenkcezisiweyo. Ngoko ke, ilizwe liye laqulunqa imigangatho efanelekileyo kunye nemimiselo efana ne-SN / T0715-1997 "Imigaqo yoHlolo lwezoThutho zokuPhathwa kweeMveliso eziQinisiweyo zokuThumela ngaphandle". Ngokumisela iimfuno ezisezantsi zokupakisha ukusebenza kwezinto, umgangatho wenkqubo yonke ukusuka kwipakethe yokubonelela ngezinto eziluhlaza, itekhnoloji yokupakisha ukuya kwimpembelelo yokupakisha iqinisekisiwe. Ngokubhekiselele koku, amashishini kufuneka aseke ilebhu yolawulo lomgangatho wokupakisha ebanzi, exhotyiswe ngamagumbi amathathu esakhiwo esidityanisiweyo sebhloko yeoksijini/umphunga wamanzi umvavanyi, umatshini okrelekrele wokuvavanya i-electronic tensile, umatshini wocinezelo wekhadibhodi kunye nezinye izixhobo zovavanyo, ukwenza uluhlu lovavanyo Izixhobo zokupakisha ezikhenkcezisiweyo, kubandakanya ukusebenza komqobo, ukusebenza ngokucinezelayo, ukuchasana nokugqobhoza, ukumelana nokukrazula, kunye nokuchasana nempembelelo.
Isishwankathelo, izinto zokupakisha ukutya okukhenkcezisiweyo zijongene neemfuno ezininzi kunye neengxaki kwinkqubo yesicelo. Ukufunda kunye nokusombulula ezi ngxaki kuluncedo olukhulu ekuphuculeni umgangatho wogcino kunye nokuthuthwa kokutya okukhenkcezisiweyo. Ukongezelela, ukuphucula inkqubo yokuhlola ukupakishwa kunye nokuseka inkqubo yedatha yokuvavanya izinto ezahlukeneyo zokupakisha kuya kubonelela ngesiseko sophando sokukhethwa kwezinto ezizayo kunye nokulawula umgangatho.
Ukuba unayofeyomisiweyofoodpukumangalelaiimfuno, ungaqhagamshelana nathi. Njenge umenzi wokupakisha oguquguqukayongaphezu kweminyaka engama-20, siya kubonelela ngezisombululo zakho zokupakisha ezichanekileyo ngokweemfuno zakho zemveliso kunye nohlahlo lwabiwo-mali.
Ixesha lokuposa: Sep-27-2023
