Yuav ua li cas UV kua nplaum curing teeb kom qhuav? Lub hauv paus ntsiab lus ua haujlwm ntawm UV kua nplaum curing teeb yog dab tsi? UV curing adhesive yog tsim los ntawm cov cob qhia yooj yim, active monomer, photoinitiator thiab lwm yam khoom tseem ceeb, stabilizer, crosslinking tus neeg saib xyuas, coupling tus neeg sawv cev thiab lwm yam auxiliary agents. UV kua nplaum curing teeb yog irradiated nrog UV teeb ntawm qhov tsim nyog wavelength, lub photoinitiator sai sai tsim cov neeg sawv cev dawb los yog ion, thiab tom qab ntawd pib lub polymerization thiab cross-linking ntawm lub hauv paus cob thiab cov nquag monomer los tsim ib lub network qauv, thiaj li. ua tiav qhov kev sib txuas ntawm cov khoom siv nplaum.
Yuav ua li cas UV kua nplaum curing teeb kom qhuav? Lub hauv paus ntsiab lus ua haujlwm ntawm UV kua nplaum curing teeb yog dab tsi?
1.1.6 Txoj kev xav, cationic polymerized monomer tuaj yeem siv rau cationic curing. Nws tuaj yeem ua cationically polymerized lossis copolymerized nrog ntau yam khoom siv monomer los ntawm heterocyclic tebchaw xws li olefin, epoxy, ketal, vinegar, silicone, thiab lwm yam. Tau txais lub cev zoo thiab tshuaj lom neeg. Cov txheej txheem yooj yim ntawm cov txheej txheem kho cov yeeb yaj kiab no tau tshwm sim thaum xyoo 1980s, suav nrog vinyl ether series thiab epoxy series. Vinyl ether resins tuaj yeem tau txais los ntawm cov tshuaj tiv thaiv ntawm 311 vinyl ether thiab cov khoom sib xws. Tab sis tam sim no feem ntau siv los yog hloov kho epoxy resin lossis epoxy resin, feem ntau yog siv epoxy resin thiab bisphenol A epoxy resin, silicone resin, epoxidized polybutadiene, epoxidized ntuj roj hmab, thiab lwm yam. Feem ntau siv yog bisphenol A epoxy resin, tab sis nws viscosity yog siab dua thiab aggregation qeeb; aliphatic epoxy compounds feem ntau polymerize sai, ntawm cov uas 3,4-epoxycyclohexyl carboxylate-3,4- Epoxy cyclohexyl methyl ester (CY179) yog cov feem ntau siv cationic curing aliphatic epoxy resin. Nws tsis tshua muaj viscosity, sib sau ua ke thiab nrawm tuaj yeem siv nrog bisphenol A epoxy resin. Epoxy compounds muaj lub nplhaib me me-qhib shrinkage tus nqi. Nyob rau hauv lub hauv paus ntawm ib co polycyclic compounds, lub teeb-kho compositions kuj tau siv. UV kua nplaum curing teeb tuaj yeem nthuav dav hauv ntim thaum lub sijhawm txheej txheem polymerization, xws li thawj acetate hauv cov txheej txheem qhib lub nplhaib. Lub sij hawm ntim expansion tus nqi yog 1.5%. Lub vinyl ether compound yog nplua nuj nyob rau hauv electrons thiab yuav siv tau raws li ib tug cationic curing polymerization reactor los yog diluent.
Ntawm ib sab, lub diluent plays lub luag hauj lwm ntawm diluting, ua rau cov nplaum yooj yim los tuav; ntawm qhov tod tes, nws plays lub luag haujlwm ntawm kev sib txuas ntawm kev sib txuas, yog li nws yuav tsum muaj kev ua haujlwm zoo. Tom qab kho, nws nkag mus rau hauv cov resin network thiab muaj kev cuam tshuam zoo rau kev ua haujlwm kawg ntawm cov khoom kho. Reactive diluents feem ntau yog ntxiv los txhim kho viscosity, adhesion, yooj, hardness thiab curing ceev. Cov khoom ntawm cov khoom sib txawv ntawm cov diluents yuav txawv heev ntawm cov hauv paus cob. Feem ntau rau nws cov viscosity tsawg, siab dilution thiab siab muaj peev xwm, nrog rau volatility, toxicity, tsis tshua muaj irritation thiab tsis hnov tsw, tsis tshua muaj nqi, siab stability thiab zoo resin compatibility thiab lwm yam yuav tsum tau. Diluents feem ntau yog siv los kho ntau yam khoom.
1.2.1 Dawb radical active diluent Cov dawb radical active diluent tau muab faib ua thawj tiam acrylic multifunctional monomer tsim ua ntej, lub thib ob tiam acrylic multifunctional monomer thiab lub thib peb tiam acrylic monomer nyuam qhuav tsim. Thawj tiam ntawm acrylate multifunctional monomers yog 1,6-propylene glycol acrylate (HDDA), 2,1,4-butanediol acrylate (BDDA), propylene glycol acrylate (DPGDA), glycerol acrylate (TPGDA) thiab peb pawg Methyl propane acrylate functional (TMPTA) thiab pentaerythritol triacrylate (PETA), feem ntau yog lub teeb-raws li triethylene glycol acrylate methyl propane (TMPTMA), thiab lwm yam. Lawv hloov thawj tiam ntawm low-reactivity acrylic monofunctional monomers. Txawm li cas los xij, nrog kev txhim kho sai ntawm ultraviolet curing technology, nws nthuav tawm qhov tsis zoo ntawm daim tawv nqaij. Yog li ntawd, lub thib ob thiab thib peb tiam acrylic monomers tau tsim los kov yeej cov shortcomings ntawm siab khaus, siab ua hauj lwm thiab high degree ntawm curing. Feem ntau qhia ethoxy lossis oxygen radicals rau hauv lub thib ob tiam acrylic acid multifunctional monomer molecules, xws li ethoxylated triethylene glycol acrylate methyl propane (TMP (EO) TMA), c oxygen trifluoromethane Ethylene glycol acrylate methyl propane TMP (PO) TMA). Oxygen glyceryl triacrylate c G (PO)TA o Lub cim thib peb ntawm acrylic monomer feem ntau muaj methoxy acrylate, uas zoo dua daws qhov tsis sib haum xeeb ntawm kev kub ceev thiab siab shrinkage tus nqi thiab qis curing degree. Cov khoom lag luam no feem ntau suav nrog 1,6-hexanediol methoxy monoacrylate (HDOMEMA), ethoxyoxy neopentyl methoxy monoacrylate (TMP (PO) MEDA), ntxiv alkoxy hauv cov molecule lub hauv paus tuaj yeem txo cov viscosity ntawm monomer thiab txo qhov kev khaus ntawm cov monomer. Tsis tas li ntawd, kev taw qhia ntawm pawg alkoxy ntawm ultraviolet lub teeb kua nplaum dej kho lub teeb zoo heev txhim kho qhov sib xws ntawm diluent monomer.
1.4 Lwm yam additives
Lub luag haujlwm tseem ceeb ntawm cov cuab yeej pabcuam yog:
Cov txheej txheem ntau lawm ntawm refined adhesives;
Ua kom ruaj khov ntawm cov khoom colloidal;
Txhim kho kev tsim kho kev ua haujlwm ntawm cov nplaum;
Txhim kho kev ua haujlwm ntawm cov roj hmab membrane, thiab lwm yam.
UV curing adhesives feem ntau yog stabilizers, leveling agents, defoamers, plasticizers thiab coupling agents.
