Abstract: Leli phepha lihlaziya inkinga yephuzu elimhlophe lamafilimu ayinhlanganisela ye-PET/VMCPP kanye ne-PET/VMPET/PE uma ehlanganiswa, futhi lethula izixazululo ezihambisanayo.
Ifilimu eyinhlanganisela ehlanganiswe ne-Aluminium iyimpahla yokupakisha ethambile “ene-aluminium ecwebezelayo” eyakhiwe ngokuhlanganisa amafilimu ahlanganiswe nge-aluminium (ngokuvamile i-VMPET/VMBOPP, VMCPP/VMPE, njll., phakathi kwayo i-VMPET ne-VMCPP okuvame ukusetshenziswa kakhulu) anamafilimu epulasitiki asobala.Isetshenziselwa ukupakishwa kokudla, imikhiqizo yezempilo, izimonyo neminye imikhiqizo.Ngenxa yokucwebezela kwayo okuhle kakhulu kwensimbi, ukusebenziseka kalula, ukufinyeleleka kwayo, kanye nokusebenza kahle kwezithiyo, iye yasetshenziswa kabanzi (izakhiwo ezingcono zokuvimba kunamafilimu ayinhlanganisela yepulasitiki, ashibhile futhi alula kunamafilimu ayinhlanganisela ye-aluminium-plastic).Kodwa-ke, amabala amhlophe avame ukwenzeka ngesikhathi sokukhiqizwa kwamafilimu ayinhlanganisela ane-aluminium plated.Lokhu kubonakala ikakhulukazi emikhiqizweni eyinhlanganisela yefilimu ene-PET/VMCPP kanye ne-PET/VMPET/PE izakhiwo.
1. Izimbangela kanye nezixazululo "zamabala amhlophe"
Incazelo yento ethi "indawo emhlophe": Kukhona amachashazi amhlophe asobala ekubukeni kwefilimu eyinhlanganisela, engasatshalaliswa ngokungahleliwe futhi enosayizi ofanayo.Ikakhulukazi kumafilimu ayinhlanganisela angaphrintiwe kanye nepuleti eligcwele likayinki omhlophe noma amafilimu ayinhlanganisela kayinki anombala okhanyayo, kusobala kakhulu.
1.1 Ukungezwani kwendawo okunganele ohlangothini lwe-aluminium plating lwembongolo ye-aluminium.
Ngokuvamile, ukuhlolwa kwe-surface tension kufanele kwenziwe phezu kwe-corona yefilimu esetshenziswe ngaphambi kwenhlanganisela, kodwa ngezinye izikhathi ukuhlolwa kwe-aluminium coating akunakwa.Ikakhulukazi kumafilimu e-VMCPP, ngenxa yokuba nokwenzeka kokuna kwezithasiselo zamangqamuzana amancane kufilimu yesisekelo se-CPP, indawo egcwele i-aluminium egcwele amafilimu e-VMCPP agcinwe isikhathi esithile ijwayele ukungezwani okunganele.
1.2 Ukungalinganisi kahle kwe-adhesive
Izinamatheliso ezisekelwe ku-solvent kufanele zikhethe ukugxila kwesisombululo sokusebenza ngokufanele ngokwebhukwana lomkhiqizo ukuze kuqinisekiswe izinga elifanele leglue.Futhi ukulawulwa kokuhlolwa kwe-viscosity kufanele kusetshenziswe phakathi nenqubo eqhubekayo yokukhiqiza eyinhlanganisela.Lapho i-viscosity ikhula kakhulu, ama-solvents kufanele afakwe ngokushesha.Amabhizinisi anemibandela angakhetha imishini yeglue yepompo ezenzakalelayo evaliwe.Izinga lokushisa elilungile lokushisa lama-adhesive angenayo i-solvent kufanele likhethwe ngokuya ngebhukwana lomkhiqizo.Ukwengeza, uma kucatshangelwa indaba yesikhathi sokusebenzisa i-solvent-free, ngemva kwesikhathi eside, iglue ku-roller yokulinganisa kufanele ikhishwe ngesikhathi esifanele.
1.3Inqubo eyinhlanganisela engalungile
Ngezakhiwo ze-PET/VMCPP, ngenxa yobukhulu obuncane kanye nokwandiswa okulula kwefilimu ye-VMCPP, ukucindezela kwe-lamination roller akufanele kube phezulu kakhulu ngesikhathi sokulayishwa, futhi ukungezwani okusongayo akufanele kube phezulu kakhulu.Kodwa-ke, lapho ukwakheka kwe-PET/VMCPP kuyinhlanganisela, ngenxa yokuthi ifilimu ye-PET iyifilimu eqinile, kuhle ukuba kwandiswe ukucindezela kwe-roller e-laminating kanye nokushuba kwesimo ngokufanele ngesikhathi sokuhlanganisa.
Imingcele yenqubo ehlanganisiwe ehambisanayo kufanele yenziwe ngokusekelwe esimweni semishini eyinhlanganisela lapho izakhiwo ze-aluminium ezehlukene ziyinhlanganisela.
1.4Izinto zangaphandle ezingena kwifilimu eyinhlanganisela edala “amabala amhlophe”
Izinto zakwamanye amazwe ikakhulukazi zihlanganisa uthuli, izinhlayiya zenjoloba, noma udoti.Uthuli nemfucumfucu ikakhulukazi kuvela endaweni yokucobelelana ngolwazi, futhi maningi amathuba okuthi kwenzeke lapho ukuhlanzeka kwendawo yokusebenzela kungembi kahle.Izinhlayiya zenjoloba ngokuyinhloko ziphuma kumadiski enjoloba, ama-coating roller, noma ama-bonding rollers.Uma isitshalo esiyinhlanganisela singeyona indawo yokusebenzela engenalo uthuli, kufanele futhi sizame ukuqinisekisa ukuhlanzeka nokuhlanzeka kwendawo yokusebenzela eyinhlanganisela, ukufaka ukususwa kothuli noma okokuhlunga (ithuluzi lokumboza, i-guide roller, idivayisi yokubopha nezinye izingxenye) zokuhlanza.Ikakhulukazi i-coating roller, i-scraper, i-flattening roller, njll kufanele ihlanzwe njalo.
1.5 Umswakama ophezulu endaweni yokusebenzela yokukhiqiza uholela “emabala amhlophe”
Ikakhulukazi ngenkathi yemvula, lapho umswakama we-workshop ≥ 80%, ifilimu ehlanganisiwe ijwayele "amabala amhlophe" okwenzekayo.Faka imitha lokushisa kanye nomswakama endaweni yokusebenzela ukuze urekhode izinguquko ezingeni lokushisa kanye nomswakama, futhi ubale amathuba okuvela kwamachashazi amhlophe.Amabhizinisi anemibandela angacabangela ukufaka okokusebenza kokususa umswakama.Ezakhiweni eziyinhlanganisela yezendlalelo eziningi ezinezici ezinhle zokuvimbela, kuyadingeka ukuthi kucatshangelwe ukumisa ukukhiqiza noma ukukhiqiza ungqimba olulodwa lwezakhiwo eziyinhlanganisela eziningi noma ngezikhathi ezithile.Ukwengeza, ngenkathi kuqinisekisa ukusebenza okuvamile kokunamathela, kunconywa ukunciphisa inani le-ejenti yokwelapha elisetshenziswe ngendlela efanele, ngokuvamile ngo-5%.
1.6 Gluing surface
Uma kungekho okungavamile okusobala okutholakalayo futhi inkinga "yezindawo ezimhlophe" ayikwazi ukuxazululwa, inqubo yokugqoka ohlangothini lwe-aluminium yokugqoka ingacatshangelwa.Kodwa le nqubo inemikhawulo ebalulekile.Ikakhulukazi uma i-VMCPP noma i-VMPET i-aluminium coating ingaphansi kokushisa nokushuba kuhhavini, ijwayele ukuwohloka okuqinile, futhi inqubo eyinhlanganisela idinga ukulungiswa.Ukwengeza, amandla e-peel we-aluminium plating layer angase ehle.
1.7 Incazelo ekhethekile yesimo lapho kungazange kutholakale khona okungavamile ngemva kokuvalwa, kodwa “amabala amhlophe” avele ngemva kokuvuthwa:
Lolu hlobo lwenkinga luvame ukwenzeka ezakhiweni ze-membrane eziyinhlanganisela ezinezakhiwo ezinhle zokuvimbela.Ngezakhiwo ze-PET/VMCPP kanye ne-PET/VMPET/PE, uma ulwelwesi lwe-membrane luwugqinsi, noma uma usebenzisa amafilimu e-KBOPP noma e-KPET, kulula ukukhiqiza “amabala amhlophe” ngemva kokuguga.
Amafilimu ayinhlanganisela ye-barrier ephezulu yezinye izakhiwo nawo athambekele enkingeni efanayo.Izibonelo zifaka phakathi ukusebenzisa ucwecwe oluwugqinsi lwe-aluminium noma amafilimu amancanyana njenge-KNY.
Isizathu esiyinhloko salesi simo “sendawo emhlophe” ukuthi kukhona ukuvuza kwegesi ngaphakathi kolwelwesi oluyinhlanganisela.Le gesi ingase ibe ukuchichima kwezincibilikisi eziyinsalela noma ukuchichima kwegesi ye-carbon dioxide ekhiqizwa ukusabela phakathi kwe-ejenti elaphayo nomhwamuko wamanzi.Ngemuva kokuthi igesi lichichima, ngenxa yezakhiwo ezinhle zokuvimbela ifilimu ehlanganisiwe, ayikwazi ukukhishwa, okuholela ekubonakaleni "kwezindawo ezimhlophe" (ama-bubbles) kungqimba oluhlanganisiwe.
Isixazululo: Uma uhlanganisa i-adhesive esekelwe ku-solvent, imingcele yenqubo efana nokushisa kwe-ovini, umthamo womoya, nokucindezela okungalungile kufanele kusethwe kahle ukuze kuqinisekiswe ukuthi ayikho i-solvent esele kungqimba lokunamathisela.Lawula umswakama endaweni yokusebenzela bese ukhetha uhlelo lokunamathela oluvaliwe.Cabangela ukusebenzisa i-ejenti yokwelapha engakhiqizi amabhamuza.Ngaphezu kwalokho, uma usebenzisa ama-adhesive asekelwe ku-solvent, kuyadingeka ukuhlola okuqukethwe komswakama ku-solvent, ngesidingo sokuqukethwe komswakama ≤ 0.03%.
Okungenhla yisingeniso sento ethi "amabala amhlophe" kumafilimu ayinhlanganisela, kodwa kunezizathu ezihlukahlukene ezingabangela izinkinga ezinjalo ekukhiqizeni kwangempela, futhi kuyadingeka ukwenza izahlulelo nokuthuthukiswa okusekelwe esimweni sangempela sokukhiqiza.
Isikhathi sokuthumela: Dec-11-2023