UV kho tshuab yog ib hom kev ua haujlwm siab, kev tiv thaiv ib puag ncig, txuag hluav taws xob thiab cov khoom siv zoo tshaj plaws.Nws yog lub npe hu ua ib tug tshiab technology rau ntsuab kev lag luam nyob rau hauv lub xyoo pua 21st.Nrog rau txoj kev loj hlob ntawm kev tshawb fawb thiab thev naus laus zis, daim ntawv thov ntawm UV kho tshuab tau tsim los ntawm cov ntawv luam tawm ntxov tshaj plaws thiab cov duab hluav taws xob rau UV curing coatings, inks thiab adhesives.Daim ntawv thov teb tau nthuav dav, tsim kev lag luam tshiab.
UV curing khoom feem ntau muab faib ua UV txheej, UV inks thiab UV adhesives.Lawv qhov tseem ceeb tshaj plaws yog tias lawv muaj qhov kho tau sai, feem ntau ntawm ob peb vib nas this thiab kaum vib nas this, thiab qhov ceev tshaj tuaj yeem kho tsis pub dhau 0.05 ~ 0.1s.Lawv yog qhov ceev tshaj plaws kom qhuav thiab kho ntawm ntau yam txheej, inks thiab adhesives tam sim no.
UV curing txhais tau tias UV curing.UV yog cov lus Askiv luv ntawm UV.Curing yog hais txog cov txheej txheem uas cov tshuaj hloov pauv los ntawm cov molecules qis rau polymers.UV curing feem ntau yog hais txog kev kho mob lossis kev xav tau ntawm cov txheej txheem (cov xim), inks, adhesives (glues) los yog lwm yam potting sealants yuav tsum tau UV curing, uas txawv ntawm cua sov curing, curing nrog adhesives (kho cov neeg sawv cev), natural curing, thiab lwm yam. [1].
Cov khoom tseem ceeb ntawm UV kho cov khoom muaj xws li oligomers, nquag diluents, photoinitiators, additives thiab lwm yam.Oligomer yog lub cev tseem ceeb ntawm UV kho cov khoom, thiab nws qhov kev ua tau zoo yog txiav txim siab qhov ua tau zoo ntawm cov ntaub ntawv kho.Yog li ntawd, kev xaiv thiab tsim ntawm oligomer yog undoubtedly ib qho tseem ceeb txuas nyob rau hauv lub formulation ntawm UV curing khoom.
Dab tsi cov oligomers muaj nyob rau hauv ntau yog tias lawv txhua tus muaj Unsaturated ob daim ntawv cog lus resins yog ranked los ntawm cov tshuaj tiv thaiv tus nqi ntawm dawb radical polymerization: acryloyloxy> methacrylyloxy> vinyl> allyl.Yog li ntawd, cov oligomers siv nyob rau hauv dawb radical UV curing yog ntau yam acrylic resins, xws li epoxy acrylate, polyurethane acrylate, polyester acrylate, polyether acrylate, acrylate resin los yog vinyl resin, thiab feem ntau siv yog epoxy acrylate resin, polyurethane acrylate resin thiab polyester acrylic resin.Peb cov resins no luv luv qhia hauv qab no.
Epoxy acrylate
Epoxy acrylic acid tus nqi yog qhov siv dav tshaj plaws thiab qhov loj tshaj plaws ntawm UV kho oligomer tam sim no.Nws yog npaj los ntawm epoxy resin thiab (meth) acrylate.Epoxy acrylates tuaj yeem muab faib ua bisphenol A epoxy acrylates, phenolic epoxy acrylates, hloov kho epoxy acrylates thiab epoxidized acrylates raws li lawv cov qauv, thiab bisphenol A epoxy acrylates yog cov siv dav tshaj plaws.
Bisphenol A epoxy acrylate yog ib qho ntawm cov oligomers nrog lub teeb kho ceev tshaj plaws.Cov zaj duab xis kho tau zoo hardness, siab gloss, zoo heev tshuaj tsis kam, zoo kub kuj thiab hluav taws xob zog.Tsis tas li ntawd, bisphenol A oxygen exchange acrylate muaj cov khoom siv raw khoom yooj yim thiab tus nqi qis.Yog li ntawd, nws yog feem ntau siv los ua lub ntsiab cob rau lub teeb curing ntawv, ntoo, yas thiab hlau coatings, thiab kuj yog lub ntsiab cob rau lub teeb curing number case thiab lub teeb curing nplaum.
Polyurethane acrylate
Polyurethane acrylate (PUA) yog ib qho tseem ceeb ntawm UV curable oligomer.Nws yog synthesized los ntawm ob-kauj ruam cov tshuaj tiv thaiv ntawm polyisocyanate, ntev-chain diol thiab hydroxyl acrylate.Vim muaj ntau yam qauv ntawm polyisocyanates thiab cov saw ntev diols, oligomers nrog cov khoom tsim tau raug tsim los ntawm kev tsim molecular.Yog li ntawd, lawv yog cov oligomers nrog cov khoom lag luam feem ntau tam sim no, thiab tau siv dav hauv UV kho coatings, inks thiab adhesives.
Polyester Acrylate
Polyester acrylate (PEA) kuj yog ib hom oligomer, uas yog npaj los ntawm cov tsis tshua muaj molecular hnyav polyester glycol los ntawm acrylate.Polyester acrylate yog tus cwj pwm los ntawm tus nqi qis thiab qis viscosity.Vim nws cov viscosity tsawg, polyester acrylate tuaj yeem siv ua ob qho tib si oligomer thiab nquag diluent.Tsis tas li ntawd, feem ntau polyester acrylates muaj ntxhiab tsw, tsis tshua muaj khaus, zoo saj zawg zog thiab pigment wettability, thiab yog haum rau xim xim thiab inks.Txhawm rau txhim kho tus nqi kho kom zoo, cov khoom siv ntau yam polyester acrylate tuaj yeem npaj tau;Amine hloov polyester acrylate tuaj yeem tsis tsuas yog txo qis kev cuam tshuam ntawm oxygen polymerization inhibition, txhim kho tus nqi kho, tab sis kuj txhim kho qhov adhesion, gloss thiab hnav tsis kam.
Active diluents feem ntau muaj cov pab pawg reactive, uas tuaj yeem yaj thiab dilute oligomers, thiab ua lub luag haujlwm tseem ceeb hauv cov txheej txheem UV kho thiab cov yeeb yaj kiab.Raws li tus naj npawb ntawm pawg reactive, ntau monofunctional active diluents muaj xws li isodecyl acrylate, lauryl acrylate, hydroxyethyl methacrylate, glycidyl methacrylate, thiab lwm yam;Bifunctional active diluents muaj xws li polyethylene glycol diacrylate series, dipropylene glycol diacrylate, neopentyl glycol diacrylate, thiab lwm yam;Multifunctional active diluents xws li trimethylolpropane triacrylate, thiab lwm yam. [2].
Initiator muaj qhov tseem ceeb ntawm kev kho tus nqi ntawm UV curing khoom.Nyob rau hauv UV curing khoom, tus nqi ntawm photoinitiator feem ntau yog 3% ~ 5%.Tsis tas li ntawd, pigments thiab muab tub lim additives kuj muaj qhov cuam tshuam tseem ceeb rau kev ua haujlwm kawg ntawm UV kho cov khoom.
Post lub sij hawm: Jun-15-2022