I-aluminium yokugquma ayinayo kuphela iimpawu zefilimu yeplastiki, kodwa kwinqanaba elithile ithatha indawo yefoyile ye-aluminium, idlala indima ekuphuculeni umgangatho wemveliso, kunye neendleko eziphantsi kakhulu. Ke ngoko, isetyenziswa kakhulu ekupakishweni kweebhiskithi kunye nokutya kwe-snack. Nangona kunjalo, kwinkqubo yokuvelisa, kudla ngokubakho ingxaki yokudluliselwa kwe-aluminium, okukhokelela ekunciphiseni amandla okukrazula kwefilimu edibeneyo, okukhokelela ekunciphiseni ukusebenza kwemveliso, kunye nokuchaphazela kakhulu umgangatho womxholo wokupakisha. Ziziphi izizathu zokudluliselwa kwe-aluminium yokugqoka? Yintoni ekufuneka ihlawulwe ingqalelo ekusebenzeni kobugcisa obuhlanganisiweyo?
Kutheni le nto i-aluminiyam iyathandeka ukuba i-delamination?
Okwangoku, iifilimu ze-aluminium ezisetyenziswa ngokuqhelekileyo ziyi-CPP i-aluminium yokucoca ifilimu kunye nefilimu ye-aluminium ye-PET, kunye nezakhiwo zefilimu ezidibeneyo ezihambelanayo ziquka i-OPP / CPP i-aluminium plating, i-PET / CPP i-aluminium plating, i-PET / i-aluminium ye-aluminium, njalo njalo. Kwizicelo ezisebenzayo, eyona nkalo iyingxaki yiPET composite PET aluminium plating.
Esona sizathu siphambili soku kukuba njenge-substrate ye-aluminium yokucoca, i-CPP kunye ne-PET inomahluko obalulekileyo kwiipropati zobunzima. I-PET inobungqongqo obuphezulu, kwaye yakha yadityaniswa nemathiriyeli ekwanokuqina okukhulu,ngexesha lenkqubo yokunyanga ifilimu yokubambelela, ubukho bokubambisana bunokubangela lula umonakalo kwi-adhesion of the aluminium coating, ekhokelela ekufudukeni kwengubo ye-aluminium. Ukongezelela, impembelelo ye-permeation ye-adhesive ngokwayo nayo inefuthe elithile kuyo.
Izilumkiso ngexesha lokusebenza kwenkqubo edibeneyo
Ekusebenzeni kweenkqubo ezidibeneyo, ingqalelo kufuneka ihlawulwe kule miba ilandelayo:
(1) Khetha izinto zokuncamathelisa ezifanelekileyo.Xa i-aluminiyamu edibeneyo yokwambathisa, qaphela ukuba ungasebenzisi izinto zokuncamathelisa ezine-viscosity ephantsi, njengoko izinto zokuncamathelisa i-viscosity ephantsi zinobunzima obuncinci bemolekyuli kunye namandla abuthathaka e-intermolecular, okukhokelela kumsebenzi owomeleleyo wemolekyuli kwaye bathambekele ekonakalisa ukunamathela kwabo kwi-substrate ngokusebenzisa i-aluminium yokwaleka ifilimu.
(2) Ukuphucula ukuthamba kwefilimu encamathelayo.Indlela ethile kukunciphisa inani le-agent ephilisayo xa ulungiselela i-adhesive yokusebenza, ukwenzela ukunciphisa iqondo lokusabela kwe-crosslinking phakathi kwe-arhente eyintloko kunye ne-agent ephilisayo, ngaloo ndlela kuncitshiswe i-brittleness yefilimu enamathelayo kunye nokugcina ukuguquguquka okulungileyo kunye nokwandiswa, okulungeleyo ukulawula ukuhanjiswa kwengubo ye-aluminium.
(3) Ubungakanani beglu esetyenzisiweyo kufuneka bufaneleke.Ukuba inani le-adhesive esetyenzisiweyo lincinci kakhulu, ngokungathandabuzekiyo liya kubangela ukukhawuleza okuncinci okudibeneyo kunye nokulula okulula; Kodwa ukuba isixa se-adhesive esetyenzisiweyo sikhulu kakhulu, akulunganga. Okokuqala, akukho qoqosho. Okwesibini, ubungakanani obukhulu be-adhesive esetyenzisiweyo kunye nexesha elide lokunyanga linefuthe elinamandla lokungena kumaleko we-aluminium. Ngoko kufuneka kukhethwe inani elifanelekileyo leglue.
(4) Lawula uxinezeleko ngokufanelekileyo. Xa ukhulula i-aluminium yokubeka,Uxinzelelo kufuneka ulawulwe kakuhle kwaye ungabi phezulu kakhulu. Isizathu kukuba i-aluminium yokugqoka iya kunweba phantsi koxinzelelo, okukhokelela kwi-deformation elastic. Ukugquma kwe-aluminium kulula ngokuhambelanayo ukukhulula kwaye ukunamathela kuncitshisiwe.
(5) Isantya sokuvuthwa.Ngokomgaqo, iqondo lokushisa lokunyanga kufuneka linyuswe ukukhawulezisa isantya sokunyanga, ukwenzela ukuba iamolekyu ezincamathelayo zikwazi ukuqinisa ngokukhawuleza kwaye zinciphise umonakalo wokungena.
Izizathu eziphambili zokudluliselwa kwe-aluminiyam ye-plating
(1) Izizathu zoxinzelelo lwangaphakathi kwiglue
Ngethuba lenkqubo yokunyanga yokushisa ephezulu ye-adhesive-component component, uxinzelelo lwangaphakathi oluveliswa yi-crosslinking ngokukhawuleza phakathi kwe-agent ephambili kunye ne-agent ephilisayo ibangela ukuhanjiswa kwe-aluminium plating. Esi sizathu sinokubonakaliswa ngovavanyo olulula: ukuba i-aluminiyam edibeneyo yokugquma ayifakwanga kwigumbi lokunyanga kwaye iphiliswa kwiqondo lokushisa elingaphakathi (kuthatha iintsuku ezininzi ukunyanga ngokupheleleyo, ngaphandle kokubaluleka kokuveliswa kwemveliso, uvavanyo nje), okanye luyanyangwa. kwiqondo lokushisa kwegumbi iiyure eziliqela ngaphambi kokungena kwigumbi lokunyanga, isenzeko sokudluliselwa kwe-aluminium siya kuncitshiswa kakhulu okanye sipheliswe.
Sifumanise ukuba ukusebenzisa i-50% yomxholo oqinileyo wokuncamathelisa kwiifilimu ezihlanganisiweyo ze-aluminiyam, nokuba zincamathelisa umxholo oqinileyo osezantsi, kuya kubangela ukuziphatha okungcono kakhulu. Oku kuchanekileyo ngenxa yokuba isakhiwo sothungelwano esenziwe ngumxholo ophantsi oqinileyo wokuncamathelisa ngexesha lenkqubo ye-crosslinking ayixinekanga njengesakhiwo sothungelwano esenziwe ngama-adhesives aphezulu aqinileyo, kunye noxinzelelo lwangaphakathi oluveliswayo alufani kangako, olunganelanga ukuba luxinene kwaye lufanane. sebenza kwi-aluminiyam yokwaleka, ngaloo ndlela ukunciphisa okanye ukuphelisa isenzeko sokudluliselwa kwe-aluminiyam.
Ngaphandle komahluko omncinci phakathi kwe-arhente ephambili kunye ne-adhesive eqhelekileyo, i-arhente yokunyanga yokuncamathelisa i-aluminiyam ngokubanzi ingaphantsi kwe-adhesive eqhelekileyo. Kukho nenjongo yokunciphisa okanye ukunciphisa uxinzelelo lwangaphakathi oluveliswa yi-adhesive crosslinking ngexesha lenkqubo yokunyanga, ukwenzela ukunciphisa ukuhanjiswa kwe-aluminium layer. Ngoko ke ngokobuqu, ndiyakholelwa ukuba indlela "yokusebenzisa ubushushu obuphezulu bokuqina ngokukhawuleza ukusombulula ukugqithiselwa kwe-aluminium yokwaleka" ayinakwenzeka, kodwa kunokuba iphumelele. Abavelisi abaninzi ngoku basebenzisa i-adhesives-based adhesives xa i-aluminium composite films plating films, enokuthi ibonakaliswe yimpawu zesakhiwo se-adhesives yamanzi.
(2) Izizathu zokolula i-deformation yeefilimu ezincinci
Enye into ecacileyo yokudluliselwa kwe-aluminium kwi-plating ifumaneka ngokubanzi kwii-composites ze-three-layer, ngakumbi kwi-PET/VMPET/PE izakhiwo. Ngokwesiqhelo, siqala sidibanisa iPET/VMPET. Xa i-composite kulo maleko, i-aluminium yokugqoka ayidluliswanga ngokubanzi. Ingubo ye-aluminium idluliswa kuphela emva koluhlu lwesithathu lwe-PE luhlanganisiwe. Ngokusebenzisa imifuniselo, siye safumanisa ukuba xa uxobula isampulu edityanisiweyo yomaleko amathathu, ukuba isixa esithile soxinzelelo sisetyenziswa kwisampulu (oko kukuthi ukuqiniswa kwesampulu ngokwenziwa), i-aluminiyam yokwaleka ayisayi kudluliselwa. Emva kokuba i-tension isusiwe, i-aluminium yokugqoka iya kudluliselwa ngokukhawuleza. Oku kubonisa ukuba i-shrinkage deformation yefilimu ye-PE ivelisa umphumo ofanayo noxinzelelo lwangaphakathi olwenziwa ngexesha lenkqubo yokunyanga. Ngoko ke, xa iimveliso ezidibeneyo kunye nesakhiwo esinemigangatho emithathu, i-tensile deformation yefilimu ye-PE kufuneka incitshiswe kangangoko kunokwenzeka ukunciphisa okanye ukuphelisa i-phenomenon yokudluliselwa kwe-aluminium.
Esona sizathu siphambili sokudluliselwa kwe-aluminium kwi-plating kuseyi-deformation yefilimu, kwaye isizathu sesibini sinamathelisa. Kwangaxeshanye, izakhiwo ze-aluminiyam ezicandiweyo zoyika kakhulu amanzi, nokuba ithontsi lamanzi lingena kumaleko wefilimu ene-aluminiyam edibeneyo, iya kubangela i-delamination enzulu.
Ixesha lokuposa: Oct-28-2023
