Ipeyinti yokunyanga ye-UV luhlobo lwepeyinti eluhlaza yokukhusela indalo, eneempawu zokungafihli okuphezulu, ubunzima obuphezulu kunye nokumelana nokuqala.Isetyenziswa ngokubanzi kwiplastiki okanye inkqubo yentsimbi yokutshiza ioli.Into ebalaseleyo echaphazela umgangatho wokugquma kunye nesivuno kwi-UV yokutshiza ipeyinti ewayo, oko kukuthi, ukunamathela phakathi kwepeyinti ye-UV yokunyanga kunye ne-substrate imbi.Emva koko siya kuhlalutya izizathu kunye nezisombululo zokubambelela okunzima ukusuka kwimiba emibini yepeyinti ye-UV kunye ne-substrate yokutshiza.
Izizathu zokuba kutheni ipeyinti yokunyanga ye-UV kunzima ukubambelela kwi-substrate:
Ukususela kuhlalutyo lwepeyinti ye-UV yokunyanga, umphumo we-UV yokugqoka kwi-substrate ibuthathaka ngokwemiqathango yokungena.Ukuqwalasela ukusebenza emva kokunyanga, i-viscosity ye-molecular weight weight resin system iyanda kwaye i-fluidity iyancipha, ngoko ke ukumanzisa kunye nokungena kwe-substrate akwanele.Ngapha koko, ukuncipha kwevolumu yepeyinti ye-UV ngexesha lokunyanga kunye nexesha lokuphendula ngokukhawuleza yimiba emibini.Owokuqala uya kubangela ukubahluko kwi-deformation phakathi kwe-coating kunye ne-substrate, ngaloo ndlela yenze uxinzelelo phakathi kokugqoka;Le yokugqibela ngenxa yokusabela ngokukhawuleza, nto leyo eya kubangela non-uniformity yesakhiwo senkqubo yepeyinti UV.
Ngokombono we-substrate ye-UV yokutshiza ipeyinti, into yokuqala ukuyiqonda yindima yokubambelela.Amandla obukho bayo anquma ukuba ipeyinti kunye ne-substrate ingakwazi ukufumana ukunamathela ukwenza i-coating eqinile.Ke apha kufuneka sithethe impembelelo ye-substrate polarity, icrystallinity, amandla angaphezulu kunye nokugudiswa kumphezulu we-substrate adhesion.I-Low non polarity okanye i-polarity, njengeplastiki ye-PP, enzima kwi-oyile, i-crystallinity ephezulu kunye namandla aphantsi komhlaba, njenge-PA nylon substrate, ngelixa ukugudiswa kubonakala ngakumbi kwintsimbi yentsimbi.Ngoko ke, isakhiwo se-molecular kunye neempawu ze-substrate nazo zinempembelelo enkulu kwi-adhesion.Ngoko ke, xa ipeyinti ye-UV inokulungelelaniswa, isitshixo sokusombulula ingxaki yokunganyangeki kakuhle kwepeyinti ye-UV kukuphucula ukubambelela phakathi kwe-substrate kunye nepeyinti ye-UV.
Iindlela zokuphucula ukunamathela phakathi kwepeyinti ye-UV kunye ne-substrate:
Kwindlela yokusombulula ukuncamatheliswa kwepeyinti yokunyanga ye-UV etshizwe kwiplastiki okanye kumphezulu wesinyithi, umaleko wepeyinti engatshintshiyo itshizwe kumphezulu we-substrate ye-Sichuan i-adhesive agent yonyango sisisombululo esisebenzayo sokuphucula ukunamathela phakathi kwe-substrate kunye ne-UV yokugquma. .Okokuqala, i-ejenti yonyango encamathelayo inokumanzisa ngokupheleleyo i-substrate.Okwesibini, i-agent yonyango iqulethe i-hydrogen eboshiweyo i-radicals yamahhala kunye namaqela e-polar afana ne-hydroxyl ye-substrate, eyenza ifilimu idibanise ngakumbi.Kwangaxeshanye, iarhente yonyango yokuncamathelisa kunye nepeyinti inokwenza iibhondi zekhemikhali, eziya kuthi zidibanise umphezulu we-substrate kunye ne-UV yokugquma, kwaye ikhuthaze ngakumbi ukuyilwa komgangatho ophezulu wokuncamathelisa phakathi kwepeyinti ye-UV kunye ne-substrate.
Ixesha lokuposa: Jun-28-2022