Iifilimu ze-All-PE zingayiphucula njani ukusebenza kwe-Oxygen Barrier ngelixa zigcina isiqinisekiso seMonomaterial?
Kwishishini lokupakisha inyama eqandisiweyo kunye nokutya okucutshungulwayo, ukufikelela kwixesha elide lokugcinwa kunye nokuphinde kusetyenziswe kwakhona kuye kwathathwa njengomngeni onzima ixesha elide. Ukuze kwandiswe ixesha lokugcinwa, kufuneka izinto ezinomqobo ophezulu ezifana ne-EVOH ukuthintela ukungena kweoksijini. Nangona kunjalo, ukuqinisekisa ukuba ukupakisha kungangena kwimithombo yokusetyenziswa kwakhona ekhoyo, izakhiwo zokupakisha ziyafuneka ngakumbi ukuba zamkele uyilo lwezinto ezibonakalayo nanini na xa kunokwenzeka.
Uphando olwenziwe yi-Institute of Food Science and Technology ye-Chinese Academy of Agricultural Sciences lubonise ukuba ukupakisha okunomqobo ophezulu kunokwandisa ubomi beshelufu yenyama entsha ebandayo ukusuka kwiintsuku ezisi-7 zemveli ukuya kwiintsuku ezingaphezu kwama-45. Xa zidityaniswe netekhnoloji yokugcina ubushushu obuphantsi kunye izisombululo zokupakisha ezinomqobo ophezulu, ixesha lokugcinwa linokwandiswa ukuya kuthi ga kwiintsuku ezili-120.
Njengoko imibutho efana neRecyClass kunye neCEFLEX ihlaziya rhoqo imigangatho yayo yoyilo lokupakisha enokusetyenziswa kwakhona, olu ngquzulwano luyasonjululwa kancinci kancinci. Impumelelo ephambili ikukulawula ipesenti yobunzima bezinto ezithintelayo ezisebenzayo ezifana ne-EVOH ngaphantsi kwe-5% yobunzima bokupakisha bubonke, ngelixa kusetyenziswa itekhnoloji yokulawula ubukhulu obuchanekileyo kwizakhiwo ze-co-extrusion ezinamalayelo asixhenxe okanye alithoba ukuze kwandiswe ukusebenza kakuhle kwe-oxygen barrier ye-EVOH kwinqanaba le-micron.
Ngokusekelwe kwimigangatho yamva nje yeshishini kunye nokuchaneka okuphucukileyo ubuchwepheshe bokukhupha kunye, eli nqaku lihlola indlela iifilimu ze-PE ezisebenza ngayo zonke izinto ezinokufikelela ngayo kumlinganiselo ophakathi kokusebenza okuphezulu kokuthintela ioksijini kunye nokusebenziseka kwakhona.
1. Iimfuneko ezikhethekileyo zoMqobo weOksijini kwiPakethe yeNyama eQhotsisiweyo
Ixesha lokugcinwa kwenyama ekhenkcezisiweyo alixhomekekanga kuphela kubushushu bokugcinwa kwayo kodwa nakwizinga leoksijini engaphakathi kwiphakheji.
Ioksijini ingabangela iingxaki ezininzi zobugcisa, kuquka:
- Ukuxinana kwe-myoglobin, okubangela utshintsho olungafunekiyo kumbala kwinyama entsha;
- Ukuxinana kwamafutha emzimbeni kunye nokurhawuzelelwa, okukhokelela kwiincasa ezingathandekiyo kunye namavumba angathandekiyo;
- Ukukhula kweentsholongwane ezisebenza nge-aerobic, okukhawulezisa ukonakala kokutya.
Ngokophando oluvela kwi-Chinese Academy of Agricultural Sciences, iifilimu zokusonga ze-PE eziqhelekileyo azinakuthintela ngempumelelo ukungena kweoksijini. Inyama entsha ebandayo epakishwe ngeefilimu ze-PE eziqhelekileyo inokufumana ukonakala okukhulu emva kweentsuku ezisi-8 kuphela, ngelixa ukupakishwa okunemiqobo ephezulu kunokwandisa ubomi beshelufu ngaphaya kweentsuku ezingama-45.
Kwinyama ekhenkcezisiweyo kunye neemveliso zokutya ezithunyelwa kwimarike yaseYurophu, ixesha elifunekayo lokuhlala ixesha elide lidla ngokuba ziinyanga ezili-12 okanye nangaphezulu. iifilimu ezithintelayo eziphezulu ezikhutshwe ngokubambisana ingahlangabezana neemfuno zokugcina inyama yehagu, inyama yenkomo, imvana, inkukhu, kunye neemveliso zaselwandle ezikhenkcezisiweyo phantsi kwamaqondo obushushu aqala kwi -18°C ukuya kwi -45°C.
Oku kuthetha ukuba izinga lokudluliselwa kweoksijini (OTR) iifilimu zokupakisha kufuneka zigcinwe kwinqanaba eliphantsi kakhulu. Izisombululo zemveli zihlala zixhomekeke kwizakhiwo zefoyile ye-aluminium okanye iileya ze-EVOH eziqinileyo ukuze zifezekise ukusebenza okuphezulu kokuthintela. Nangona kunjalo, ezi ndlela ziyangqubana nemfuno ekhulayo yezisombululo zokupakisha ezinokuphinda zisetyenziswe ze-monomaterial.
2. Imigangatho yeRecyClass yamva nje kunye neCEFLEX: I-5% "yeGolden Ratio" yoMxholo we-EVOH
Ngowama-2025, iRecyClass ikhuphe uhlaziyo olubalulekileyo kwiMigqaliselo yayo yoYilo lokuRisayikilisha kunye neenkqubo zovavanyo lokuRisayikilisha. Esinye isigqibo esibalulekileyo sitsale ingqalelo enkulu kwishishini lokupakisha:
Kwiifilimu ze-PE, xa umxholo we-EVOH ungadluli kwi-5% yobunzima befilimu iyonke, i-EVOH ithathwa njengehambelana ngokupheleleyo nomsinga wokurisayikilisha we-PE.
I-RecyClass yenze uvavanyo olucwangcisiweyo ngokwemigaqo yovavanyo lokuphindeka kwakhona kwefilimu ye-PE kwiilabhoratri ezizimeleyo. Iziphumo zovavanyo zibonise ukuba xa umxholo we-EVOH uhlala ungaphantsi komlinganiselo wobunzima we-5%, impembelelo yayo kwizinto eziphinde zasetyenziswa yayilinganiselwe.
Nangona kunjalo, xa umxholo we-EVOH udlule lo mda, iziphumo ezingalunganga kwinkqubo yokukhupha zavela ngoko nangoko, kuquka:
- Ukutyheli kwezinto ezibonakalayo;
- Amanqanaba okwanda kolusu;
- Ukwakheka okuphezulu kweejeli kunye neziphene;
- Ukuqhekeka kwamaqamza efilimu rhoqo ngexesha lokucubungula.
Ngokusekelwe kwezi ziphumo, iRecyClass ihlela uxinaniso lwe-EVOH oluyi-≤5% ngobunzima njengolu "hambelana ngokupheleleyo", nto leyo evumela ukuba kubekho uxinaniso oluphezulu lwe-B1. Ngokwahlukileyo koko, uxinaniso lwe-EVOH oludlula i-5% luthathwa njengolu "ngahambelaniyo noxinaniso."
Kwangaxeshanye, iRecyClass ikwafuna umaleko we-EVOH kunye nomaleko we-tie (umaleko we-resin onamathelayo) ukuze kuhlangatyezwane neemfuno ezithile zomlinganiselo. Inqanaba lokufakelwa kwe-maleic anhydride (MAH) kumaleko we-tie kufuneka libe yi-0.1% ubuncinane, kwaye umlinganiselo we-EVOH-to-tie-layer kufuneka uhambelane neemfuno ezithile zokuqinisekiswa.
Izikhokelo ze-CEFLEX ze-D4ACE (Design for a Circular Economy) zixhasa umgaqo ofanayo. Ngokwe-CEFLEX, izixhobo zokupakisha eziguquguqukayo kufuneka zibe ngaphezulu kwe-90% yesixhobo esinye ngobunzima ukuze kufezekiswe ukuphinda kusetyenziswe ngokufanelekileyo. Ezinye izixhobo zomntu ngamnye akufuneki zidlule kwi-5% yobunzima bubonke, ngelixa izincamathelisi kunye nee-inki zokuprinta nazo kufuneka zihambelane neemfuno zokuphinda kusetyenziswe.
Namhlanje, lo myinge we-5% ube "ngumlinganiselo wegolide" wokulinganisela ukusebenza okuphezulu kwemiqobo kunye nokusebenziseka kwakhona kwiifilimu ze-PE zonke.
3. Itekhnoloji yoKucocwa koNxibelelwano oluQhelekileyo: Ukwandisa ukusebenza kwe-EVOH ngaphakathi komda we-5%
Ngoko ke, i-EVOH ingawuzisa njani umsebenzi ophezulu wokuthintela ioksijini ngelixa igcina ipesenti yobunzima obungaphantsi kwe-5?
Impendulo ikulawulo oluchanekileyo lobukhulu ngaphakathi kwezakhiwo ze-co-extrusion ezinamaleko asixhenxe okanye alithoba.
Ifilimu eqhushumbiswe ngenyathelo elinye itekhnoloji yokukhupha kunye ivumela iileya ezahlukeneyo ezisebenzayo ukuba zibophe ngqo kwimeko enyibilikisiweyo. Amandla okubopha phakathi kweeleya afunyenwe ngale nkqubo aphezulu kakhulu kunalawo eendlela zokugquma okanye zokugquma zemveli.
Ngale teknoloji, ubukhulu bomaleko we-EVOH barrier core bunokulawulwa kwinxalenye encinci kakhulu yobukhulu befilimu iyonke ye-multilayer.
Ukuthatha i-layer esixhenxe ifilimu ekhutshwe kunye ngobukhulu obupheleleyo be-75 microns njengomzekelo, xa umlinganiselo wobunzima bomaleko we-EVOH ulawulwa ngaphantsi kwe-5%, ubukhulu bayo bokwenyani buzii-microns ezimbalwa kuphela.
Iitekhnoloji zepatenti zibonise ukuba iifilimu ze-PE ezinokuphinda zisetyenziswe ngokupheleleyo ezinokufikelela kwizinga lokudluliselwa kweoksijini (OTR) eliphantsi njenge-50 cm³/m²·ngosuku kubukhulu be-75 microns. Ngaphezu koko, ukusebenza kwe-OTR kuhlala kuzinzile nokuba umswakama ungakanani, kugcina iipropati zokuthintela ioksijini ezihlala zihleli nokuba zingaphantsi kwe-90% yeemeko zomswakama ezinxulumeneyo.
Kuyilo lweefilimu ze-PE ezinemiqobo ephezulu, umaleko we-EVOH uhlala "ufakwe isandwich" phakathi kweeleya ezimbini ze-tie resin, kunye neeleya ze-PE ezijikeleze isakhiwo.
Olu lwakhiwo lwesandwich lubonelela ngeenzuzo ezimbini ezibalulekileyo:
- Ikhusela umaleko we-EVOH kumonakalo woomatshini kunye nokuchatshazelwa kukufuma;
- Iqinisekisa ukuba umlinganiselo phakathi kwe-EVOH kunye nee-tie layers uhlangabezana neemfuno zesatifikethi sokurisayikilisha seRecyClass.
Ngokweemfuno zeRecyClass, inqanaba lokufakelwa kwe-maleic anhydride (MAH) kwi-tie layer kufuneka lifikelele ubuncinane kwi-0.1%.
Izakhiwo ze-co-extrusion ezinamanqwanqwa asixhenxe zinokuyilwa ngolu hlobo:
I-PA/TIE/PE/TIE/PA/TIE/PE (uhlobo lokusetyenziswa kobushushu obuphantsi)
okanye
I-PA/TIE/PP/TIE/PA/TIE/PP (uhlobo lwesicelo esinobushushu obuphezulu)
Kwezi zakhiwo, i-EVOH isebenza njengomaleko wesithintelo esiphambili kwaye ilawulwa ngokuchanekileyo kubukhulu obuncinci kakhulu. Oku kuvumela ifilimu ukuba igcine ukusebenza kakuhle kwesithintelo seoksijini ngelixa ifezekisa iimfuno zokusetyenziswa kwakhona.
4. Imibuzo Ebuzwa Rhoqo
Impendulo: Ewe.
Eyona nto ibalulekileyo ayikokuba ingakanani i-EVOH esetyenzisiweyo, kodwa kukuba i-EVOH ibekwe kwaye isetyenziswa kakuhle kangakanani.
Ngokulawula ubukhulu bomaleko we-EVOH ngaphakathi komda wobunzima be-5% kwaye uwubeke kwindawo ephambili yesakhiwo esidibeneyo esinamaleko asixhenxe okanye amaleko alithoba, izinto zinokufezekisa ukusebenza okugqwesileyo kokuthintela ioksijini.
Idatha yepatenti ibonisa ukuba inokuphinda isetyenziswe ngokupheleleyo iifilimu ze-PE ezinemiqobo ephezulu inokufikelela kwi-OTR ephantsi njenge-50 cm³/m²·ngosuku kubukhulu be-75 microns, ngelixa igcina ukusebenza okuzinzileyo kokuthintela nokuba kumanzi kangakanani na.
Eli nqanaba lomqobo weoksijini lanele ukuhlangabezana neemfuno zeemveliso zenyama ezikhenkcezisiweyo ezifuna ubomi beshelufu obungaphezulu kweenyanga ezili-12.
Uphando oluvela kwi-Chinese Academy of Agricultural Sciences luqinisekisile ukuba ukupakisha okunemiqobo emininzi kunokwandisa ixesha lokugcinwa kwenyama entsha ebandayo ukusuka kwiintsuku ezisi-7 ukuya kwiintsuku ezingaphezu kwama-45.
Impendulo: Le migangatho mibini ilandela icala elinye, nangona iinkcazo zayo ezithile zahlukile kancinci.
Kuhlaziyo lwayo lwango-2025, iRecyClass ibeke umxholo we-EVOH ≤5% ngokobunzima njengo "ohambelana ngokupheleleyo" nemijelo yokurisayikilisha ye-PE kwaye yavumela umlinganiselo ophezulu wokuphinda kurisayikilishwe we-B1.
Kwangaxeshanye, iRecyClass ifuna umaleko we-EVOH kunye nomaleko we-tie ukuhlangabezana neemfuno ezithile zomlinganiselo, kuquka nenqanaba elincinci le-MAH lokugrafta eliyi-≥0.1% kumaleko we-tie.
Izikhokelo ze-CEFLEX ze-D4ACE zigxile ekubunjweni kwezinto zizonke, zifuna ukuba into enye ithathe ngaphezulu kwe-90% yobunzima bepakeji iyonke, ngelixa into nganye eyongezelelweyo ingadluli kwi-5%.
Kwiinkampani ezithumela kwamanye amazwe kwiimarike ezahlukeneyo, kuyacetyiswa ukuba zilandele iimfuno ezithile zemibutho yokuqinisekisa yemarike ekujoliswe kuyo. Enyanisweni, zombini ezi migangatho zinokufezekiswa ngaxeshanye ngoyilo lwefilimu olulungisiweyo oluneeleya ezininzi.
Impendulo: Kukho imingeni emithathu emikhulu.
Umaleko we-EVOH okwinqanaba le-micron ufuna uzinzo oluphezulu kakhulu kwinkqubo yokukhupha kunye noyilo oluphambili lwedayi.
Ukuphambuka kobukhulu obungaphezulu kwe-±10% kunokukhokelela ekutshintsheni kokusebenza kwemiqobo okanye ukungaphumeleli ukuhlangabezana neemfuno zesatifikethi sokurisayikilisha.
Inyathelo elinye ifilimu evuthelweyo Itekhnoloji yokudibanisa i-co-extrusion ifuna ukuba zonke iileya zidibane ngqo kwimeko enyibilikisiweyo. Nangona amandla okubopha ephezulu kakhulu kuneenkqubo zendabuko ze-lamination, iimfuno zolawulo lweeparameter zenkqubo zinzima kakhulu.
I-EVOH kunye ne-PE zinomahluko omkhulu kwi-polarity, oko kuthetha ukuba umaleko wokuncamathelisa ohambelanayo ubalulekile.
I-PE egxunyekwe kwi-anhydride ye-Maleic idla ngokusetyenziswa njengomaleko we-tie resin. Inqanaba layo lokufakelwa kufuneka lifikelele ubuncinane kwi-0.1%, kwaye umlinganiselo we-EVOH-to-tie-layer kufuneka uhambelane neemfuno zesatifikethi seRecyClass.
Ukufikelela kwintsebenzo kwinqanaba lelebhu linyathelo lokuqala kuphela.
Ngexesha lokuvelisa ngobuninzi, abavelisi kufuneka baphucule ngokuphindaphindiweyo iifestile zokucubungula kwizixhobo zoshishino ukuqinisekisa:
- Umxholo we-EVOH ohambelanayo kulo lonke umqulu wefilimu;
- Ukusebenza okuzinzileyo kokuthintela ioksijini;
- Ukuthobela rhoqo iimfuno zesatifikethi sokukwazi ukuphinda usebenzise.
Kuphela ngolawulo oluchanekileyo lwenkqubo apho iifilimu ze-PE ezithintela kakhulu zinokufumana zombini ukusebenza kobugcisa kunye nokuthembeka kwemveliso yorhwebo.
Isiphelo
Kwintsimi yenyama ekhenkcezisiweyo kunye neyokucutshungulwa ukupakishwa kokutya, ukusebenza kakuhle kwemiqobo kunye nokusebenziseka kwakhona akuzonjongo zingqubanayo.
Imigangatho yamva nje evela kwiRecyClass kunye neCEFLEX inika ishishini lokupakisha indlela ecacileyo yophuhliso:
Ngokulawula ngokuchanekileyo umxholo we-EVOH ngaphakathi kwe-5% yobunzima bokupakisha bonke kunye nokusebenzisa itekhnoloji ye-co-extrusion enamaleko asixhenxe okanye alithoba ukuze kufezekiswe amaleko asebenzayo abhityileyo kakhulu, abavelisi banokwenza izisombululo zokupakisha ezinikezela ukusebenza okuphezulu kokuthintela ioksijini kunye nokusebenziseka kwakhona.
Olu lwakhiwo lwefilimu oluphucukileyo aluhlangabezani nje neemfuno zokukhusela ioksijini kwiimveliso zenyama ezikhenkcezisiweyo ezihlala ixesha elide kodwa lukwabonelela ngendlela efunekayo yokuqinisekiswa kokuhlanganiswa kwimithombo ekhoyo yokurisayikilisha ye-PE.
Njengoko imithetho yokupakisha ezinzileyo iqhubeka nokukhula kwihlabathi liphela, itekhnoloji yokudibanisa i-accuracy multilayer co-extrusion iya kuba sisisombululo esiphambili sokufezekisa isizukulwana esilandelayo se-PE esebenza kakuhle, enokusetyenziswa kwakhona, kwaye ilula. iifilimu zokupakisha.
