Mercury vapor, lub teeb-emitting diode (LED), thiab excimer yog qhov txawv ntawm UV-kho teeb technologies. Thaum tag nrho peb yog siv nyob rau hauv ntau yam txheej txheem photopolymerization rau crosslink inks, coatings, adhesives, thiab extrusion, lub mechanisms tsim lub radiated UV zog, raws li zoo raws li cov yam ntxwv ntawm cov coj spectral output, yog txawv kiag li. Kev nkag siab txog qhov sib txawv no yog qhov tseem ceeb hauv kev siv thiab tsim kev tsim kho, UV-kho qhov chaw xaiv, thiab kev koom ua ke.
Mercury Vapor Teeb
Ob lub electrode arc teeb thiab electrode-tsawg microwave teeb poob nyob rau hauv qeb ntawm mercury vapor. Mercury vapor teeb yog ib hom nruab nrab-siab, roj-tso cov teeb uas muaj me me ntawm cov ntsiab lus mercury thiab cov roj inert yog vaporized rau hauv cov ntshav hauv lub raj quartz kaw. Plasma yog ib qho zoo kawg nkaus kub-kub ionized roj muaj peev xwm ua hluav taws xob. Nws yog tsim los ntawm kev siv hluav taws xob hluav taws xob nruab nrab ntawm ob lub electrodes hauv lub teeb arc lossis los ntawm microwaving ib lub teeb tsis tshua muaj hluav taws xob hauv ib lub qhov rooj lossis kab noj hniav zoo ib yam li lub tswv yim rau tsev neeg lub qhov cub microwave. Thaum vaporized, mercury plasma emits broad-spectrum teeb hla ultraviolet, pom, thiab infrared wavelengths.
Nyob rau hauv cov ntaub ntawv ntawm ib tug hluav taws xob arc teeb, ib tug thov voltage energizes lub kaw quartz raj. Lub zog no vaporizes cov mercury rau hauv lub plasma thiab tso tawm electrons los ntawm vaporized atoms. Ib feem ntawm cov hluav taws xob (-) ntws mus rau lub teeb qhov zoo tungsten electrode lossis anode (+) thiab mus rau hauv UV system cov hluav taws xob hluav taws xob. Cov atoms nrog cov tshiab electrons uas ploj lawm ua zoo energized cations (+) uas ntws mus rau lub teeb lub negatively them tungsten electrode los yog cathode (-). Thaum lawv txav mus, cations tawm tsam nruab nrab atoms hauv cov roj sib tov. Qhov cuam tshuam hloov electrons los ntawm nruab nrab atoms mus rau cations. Raws li cations nce electrons, lawv poob rau hauv lub xeev qis zog. Lub zog sib txawv yog tawm raws li photons uas tawm sab nraud ntawm lub raj quartz. Muab lub teeb tsim nyog, ua kom txias txias, thiab ua haujlwm hauv nws lub neej muaj txiaj ntsig, qhov khoom tsis tu ncua ntawm cov khoom tsim tshiab cations (+) gravitate mus rau qhov tsis zoo electrode los yog cathode (-), tawm tsam ntau atoms thiab ua cov emissions ntawm UV teeb. Microwave teeb ua haujlwm zoo ib yam tshwj tsis yog cov microwaves, tseem hu ua xov tooj cua zaus (RF), hloov cov hluav taws xob hluav taws xob. Txij li thaum lub teeb microwave tsis muaj tungsten electrodes thiab tsuas yog ib lub raj quartz kaw uas muaj mercury thiab inert gas, lawv feem ntau hu ua electrodeless.
UV tso zis ntawm broadband los yog broad-spectrum mercury vapor teeb spans ultraviolet, pom, thiab infrared wavelengths, nyob rau hauv kwv yees sib npaug sib npaug. Qhov feem ntawm ultraviolet muaj xws li kev sib xyaw ntawm UVC (200 txog 280 nm), UVB (280 txog 315 nm), UVA (315 txog 400 nm), thiab UVV (400 txog 450 nm) wavelengths. Cov teeb uas emit UVC nyob rau hauv wavelengths hauv qab 240 nm tsim ozone thiab yuav tsum tau tso pa tawm los yog pom.
Cov zis spectral rau lub teeb mercury vapor tuaj yeem hloov pauv los ntawm kev ntxiv me me ntawm dopants, xws li: hlau (Fe), gallium (Ga), lead (Pb), tin (Sn), bismuth (Bi), lossis indium (Indium) ). Cov hlau ntxiv hloov pauv cov ntshav plasma thiab, yog li ntawd, lub zog tso tawm thaum cations tau txais electrons. Teeb nrog cov hlau ntxiv yog hu ua doped, additive, thiab hlau halide. Feem ntau UV-formulated inks, coatings, adhesives, thiab extrusion yog tsim los kom phim cov zis ntawm tus qauv mercury- (Hg) lossis hlau- (Fe) doped teeb. Hlau-doped teeb hloov ib feem ntawm UV tso zis mus ntev, ze-pom wavelengths, uas ua rau kom nkag tau zoo dua los ntawm cov thicker, hnyav pigmented formulations. UV formulations uas muaj titanium dioxide yuav kho tau zoo dua nrog gallium (GA)-doped teeb. Qhov no yog vim lub teeb gallium hloov ib feem tseem ceeb ntawm UV tso tawm mus rau lub wavelengths ntev dua 380 nm. Txij li thaum titanium dioxide additives feem ntau tsis nqus lub teeb siab tshaj 380 nm, siv cov roj teeb gallium nrog cov qauv dawb tso cai rau UV zog ntau dua los ntawm photoinitiators uas tsis yog cov khoom ntxiv.
Spectral profiles muab cov qauv tsim thiab cov neeg siv kawg nrog qhov pom kev sawv cev ntawm qhov tso zis hluav taws xob li cas rau cov qauv teeb tshwj xeeb raug faib thoob plaws hauv electromagnetic spectrum. Thaum vaporized mercury thiab additives hlau tau txhais cov yam ntxwv ntawm hluav taws xob, qhov sib xyaw ntawm cov ntsiab lus thiab cov roj inert hauv lub raj quartz nrog rau lub teeb tsim thiab kho qhov system tsim tag nrho cov txiaj ntsig UV. Lub spectral tso zis ntawm ib lub teeb uas tsis yog-integrated teeb powered thiab ntsuas los ntawm lub teeb khoom nyob rau hauv qhib cua yuav muaj ib tug txawv spectral output tshaj lub teeb mounted nyob rau hauv lub teeb taub hau nrog zoo tsim reflector thiab txias. Spectral profiles tau yooj yim muaj los ntawm UV system cov chaw muag khoom, thiab muaj txiaj ntsig zoo hauv kev tsim kho thiab xaiv lub teeb.
Ib qho spectral profile plots spectral irradiance ntawm y-axis thiab wavelength ntawm x-axis. Lub spectral irradiance tuaj yeem pom nyob rau hauv ntau txoj hauv kev suav nrog tus nqi tiag (xws li W / cm2 / nm) lossis kev txiav txim siab, txheeb ze, lossis kev ntsuas (unit-tsawg). Cov profiles feem ntau tso saib cov ntaub ntawv xws li kab ntawv lossis ua daim ntawv qhia bar uas pab pawg tso tawm rau hauv 10 nm bands. Cov nram qab no mercury arc teeb spectral output graph qhia cov txheeb ze irradiance nrog rau lub wavelength rau GEW lub tshuab (Daim duab 1).
DAIM 1 »Spectral tso zis kab kos rau mercury thiab hlau.
Lub teeb yog lo lus siv los xa mus rau UV-emitting quartz raj hauv Tebchaws Europe thiab Asia, thaum North thiab South Americans nyiam siv cov khoom sib hloov ntawm lub teeb thiab teeb. Lub teeb thiab lub teeb lub taub hau ob leeg xa mus rau tag nrho lub rooj sib txoos uas muaj lub tsev quartz raj thiab tag nrho lwm yam khoom siv hluav taws xob thiab hluav taws xob.
Electrode Arc Teeb
Lub tshuab hluav taws xob arc teeb muaj lub taub hau teeb, kiv cua txias lossis chiller, lub zog hluav taws xob, thiab tib neeg-tshuab interface (HMI). Lub taub hau teeb muaj xws li lub teeb (lub teeb), lub teeb pom kev zoo, lub qhov rooj hlau lossis lub vaj tsev, lub rooj sib dhos kaw, thiab qee zaum lub qhov rais quartz lossis hlau thaiv. GEW mounts nws quartz raj, reflectors, thiab shutter mechanisms nyob rau hauv cassette sib dhos uas yuav yooj yim tshem tawm ntawm lub sab nrauv teeb lub taub hau casing los yog vaj tse. Tshem tawm GEW cassette feem ntau ua tiav hauv vib nas this siv ib qho Allen wrench. Vim tias cov zis UV, tag nrho lub taub hau loj thiab cov duab, cov yam ntxwv ntawm lub cev, thiab cov khoom siv ntxiv xav tau sib txawv ntawm daim ntawv thov thiab kev ua lag luam, electrode arc teeb tshuab feem ntau yog tsim los rau ib pawg ntawm kev siv lossis hom tshuab zoo sib xws.
Mercury vapor teeb emit 360 ° ntawm lub teeb los ntawm quartz raj. Arc teeb tshuab siv cov reflectors nyob rau sab thiab nraub qaum ntawm lub teeb kom ntes thiab tsom ntau lub teeb mus rau qhov kev ncua deb ntawm lub taub hau ntawm lub teeb. Qhov kev ncua deb no yog hu ua kev tsom xam thiab yog qhov twg irradiance loj tshaj. Arc teeb feem ntau tawm hauv thaj tsam ntawm 5 txog 12 W / cm2 ntawm qhov tsom. Txij li thaum nyob ib ncig ntawm 70% ntawm UV tso tawm los ntawm lub teeb lub taub hau los ntawm lub reflector, nws yog ib qho tseem ceeb uas yuav tsum tau ua kom cov reflectors huv si thiab hloov lawv raws sij hawm. Tsis tu lossis hloov cov reflectors yog ib qho kev pab cuam rau kev kho tsis txaus.
Rau ntau tshaj 30 xyoo, GEW tau txhim kho qhov ua tau zoo ntawm nws cov txheej txheem kho, kho cov yam ntxwv thiab cov zis kom tau raws li cov kev xav tau ntawm cov ntawv thov tshwj xeeb thiab kev lag luam, thiab tsim cov khoom lag luam loj ntawm kev sib koom ua ke. Raws li qhov tshwm sim, niaj hnub no kev lag luam muab los ntawm GEW suav nrog cov qauv tsim vaj tsev tsim, cov duab tsom tau ua kom zoo dua rau UV kev cuam tshuam thiab txo qis infrared, lub kaw lus kaw lus ntsiag to, lub vev xaib tiab thiab qhov qhib, clam-plhaub web pub, nitrogen inertion, zoo siab lub taub hau, kov-screen. tus neeg teb xov tooj interface, khoom siv hluav taws xob hauv lub xeev, kev ua haujlwm zoo dua, kev saib xyuas UV tso tawm, thiab kev saib xyuas tej thaj chaw deb.
Thaum nruab nrab-siab electrode teeb khiav, lub quartz nto kub yog nyob nruab nrab ntawm 600 ° C thiab 800 ° C, thiab cov plasma kub yog ob peb txhiab degrees centigrade. Kev quab yuam huab cua yog qhov tseem ceeb ntawm kev tswj xyuas lub teeb ua haujlwm kom raug thiab tshem tawm qee lub zog hluav taws xob infrared. GEW muab cov cua no tsis zoo; Qhov no txhais tau hais tias huab cua yog rub los ntawm lub casing, raws li lub reflector thiab lub teeb, thiab sab laug tawm lub rooj sib txoos thiab deb ntawm lub tshuab los yog kho qhov chaw. Qee lub tshuab GEW xws li E4C siv cov kua dej txias, uas ua rau muaj qhov tso zis ntau dua UV thiab txo qhov loj ntawm lub taub hau tag nrho.
Electrode arc teeb muaj lub voj voog sov thiab txias. Lub teeb raug ntaus nrog qhov cua txias tsawg. Qhov no tso cai rau cov mercury plasma nce mus rau qhov xav tau kev ua haujlwm kub, tsim cov hluav taws xob dawb thiab cations, thiab pab kom cov dej ntws tam sim no. Thaum lub teeb lub taub hau raug kaw, qhov cua txias tseem khiav rau ob peb feeb kom sib npaug ntawm lub raj quartz. Lub teeb uas sov heev yuav tsis rov tawm dua thiab yuav tsum tau txias mus ntxiv. Qhov ntev ntawm lub voj voog pib thiab lub caij txias, nrog rau kev degradation ntawm cov electrodes thaum lub sij hawm txhua qhov kev tawm tsam yog vim li cas pneumatic shutter mechanisms yeej ib txwm koom ua ke rau hauv GEW electrode arc teeb sib dhos. Daim duab 2 qhia cov cua txias (E2C) thiab kua txias (E4C) electrode arc teeb.
DAIM 2 »Ua kua-txias (E4C) thiab cua txias (E2C) electrode arc teeb.
UV LED Teeb
Semi-conductors yog cov khoom siv crystalline, uas yog me ntsis conductive. Hluav taws xob ntws los ntawm ib tug semi-conductor zoo dua ib tug insulator, tab sis tsis zoo li ib tug hlau conductor. Ib txwm tshwm sim tab sis tsis muaj txiaj ntsig semi-conductors suav nrog cov khoom silicon, germanium, thiab selenium. Synthetically fabricated semi-conductors tsim rau cov zis thiab efficiency yog cov ntaub ntawv sib xyaw nrog impurities precisely impregnated nyob rau hauv cov qauv siv lead ua. Nyob rau hauv rooj plaub ntawm UV LEDs, aluminium gallium nitride (AlGaN) yog cov khoom siv feem ntau.
Semi-conductors yog qhov tseem ceeb rau cov khoom siv hluav taws xob niaj hnub no thiab tau tsim los tsim cov transistors, diodes, lub teeb-emitting diodes, thiab micro-processors. Cov khoom siv semi-conductor tau muab tso rau hauv cov khoom siv hluav taws xob thiab txuas rau hauv cov khoom xws li xov tooj ntawm tes, laptops, ntsiav tshuaj, khoom siv, dav hlau, tsheb, cov chaw taws teeb tswj, thiab txawm tias cov khoom ua si menyuam yaus. Cov khoom me me tab sis muaj zog no ua rau cov khoom siv niaj hnub ua haujlwm thaum tseem tso cai rau cov khoom kom compact, thinner, hnyav hnyav, thiab pheej yig dua.
Nyob rau hauv cov ntaub ntawv tshwj xeeb ntawm LEDs, precisely tsim thiab fabricated semi-conductor cov ntaub ntawv emit kuj nqaim wavelength bands ntawm lub teeb thaum txuas nrog ib tug DC fais fab mov. Lub teeb yog tsim tsuas yog thaum tam sim no ntws los ntawm qhov zoo anode (+) mus rau qhov tsis zoo cathode (-) ntawm txhua LED. Txij li cov zis LED yog ceev thiab tswj tau yooj yim thiab quasi-monochromatic, LEDs yog qhov tsim nyog rau kev siv xws li: qhov taw qhia teeb; infrared kev sib txuas lus teeb liab; backlighting rau TVs, laptops, ntsiav tshuaj, thiab cov xov tooj ntse; electronic signs, billboards, thiab jumbotrons; thiab UV curing.
Ib qho LED yog qhov sib txuas zoo-tsis zoo (pn junction). Qhov no txhais tau hais tias ib feem ntawm LED muaj tus nqi zoo thiab raug xa mus rau lub anode (+), thiab lwm qhov muaj tus nqi tsis zoo thiab raug xa mus rau cathode (-). Txawm hais tias ob tog muaj kev coj zoo, qhov kev sib tshuam ntawm qhov chaw uas ob tog sib ntsib, hu ua thaj chaw depletion, tsis yog kev coj ua. Thaum qhov zoo (+) lub davhlau ya nyob twg ntawm qhov ncaj qha tam sim no (DC) lub zog hluav taws xob txuas nrog lub anode (+) ntawm LED, thiab qhov tsis zoo (-) davhlau ya nyob twg ntawm qhov chaw txuas nrog cathode (-), tsis zoo them electrons nyob rau hauv lub cathode thiab zoo them electron vacancy nyob rau hauv lub anode yog repelled los ntawm lub hwj chim qhov chaw thiab thawb mus rau lub depletion cheeb tsam. Qhov no yog ib qho kev tsis ncaj ncees rau pem hauv ntej, thiab nws muaj qhov cuam tshuam los ntawm kev kov yeej txoj kev tsis sib haum xeeb. Qhov tshwm sim yog tias cov hluav taws xob dawb hauv cheeb tsam n-hom hla dhau thiab sau cov chaw ua haujlwm hauv thaj av p-hom. Raws li cov electrons ntws hla ciam teb, lawv hloov mus rau hauv lub xeev qis zog. Cov kev poob qis hauv lub zog yog tso tawm los ntawm semi-conductor li photons ntawm lub teeb.
Cov ntaub ntawv thiab dopants uas tsim cov qauv crystalline LED txiav txim siab cov zis spectral. Niaj hnub no, cov khoom lag luam muaj LED curing qhov chaw muaj ultraviolet outputs nyob nruab nrab ntawm 365, 385, 395, thiab 405 nm, ib txwm kam rau ua ntawm ± 5 nm, thiab Gaussian spectral tis. Qhov ntau dua qhov ncov spectral irradiance (W / cm2 / nm), qhov siab dua ntawm lub tswb nkhaus. Thaum UVC kev txhim kho txuas ntxiv ntawm 275 thiab 285 nm, cov khoom tsim tawm, lub neej, kev ntseeg siab, thiab tus nqi tseem tsis tau ua lag luam rau kev kho tshuab thiab kev siv.
Txij li UV-LED tso zis tam sim no txwv rau UVA wavelengths ntev dua, UV-LED curing system tsis tso tawm cov khoom siv dav dav spectral tso tawm cov yam ntxwv ntawm nruab nrab-siab mercury vapor teeb. Qhov no txhais tau hais tias UV-LED curing systems tsis emit UVC, UVB, feem ntau pom lub teeb, thiab tshav kub-tsim infrared wavelengths. Thaum qhov no ua rau UV-LED curing systems siv rau hauv ntau cov ntawv siv cua sov, cov ntaub ntawv uas twb muaj lawm, txheej, thiab cov nplaum tsim rau nruab nrab-siab mercury teeb yuav tsum tau kho dua tshiab rau UV-LED curing systems. Hmoov zoo, chemistry cov chaw muag khoom tau nce kev tsim cov khoom raws li kev kho dual. Qhov no txhais tau hais tias ib daim ntawv kho dual-kho tau npaj los kho nrog UV-LED teeb kuj yuav kho nrog lub teeb mercury vapor (Daim duab 3).
DAB 3 »Spectral output daim ntawv qhia rau LED.
GEW's UV-LED curing systems tawm mus txog 30 W / cm2 ntawm lub qhov rais emitting. Tsis zoo li electrode arc teeb, UV-LED curing systems tsis suav nrog cov reflectors uas ncaj qha lub teeb rays mus rau ib qho kev tsom xam. Yog li ntawd, UV-LED ncov irradiance tshwm sim ze rau lub qhov rais emitting. Cov emission UV-LED rays sib txawv ntawm ib leeg raws li qhov kev ncua deb ntawm lub teeb lub taub hau thiab kho nto nce. Qhov no txo cov teeb pom kev zoo thiab qhov loj ntawm irradiance uas ncav cuag qhov kho qhov chaw. Thaum lub ncov irradiance tseem ceeb rau crosslinking, qhov nce siab dua irradiance tsis yog ib txwm muaj txiaj ntsig thiab tuaj yeem cuam tshuam ntau dua crosslinking ntom. Wavelength (nm), irradiance (W / cm2) thiab lub zog ntom ntom (J / cm2) txhua tus ua lub luag haujlwm tseem ceeb hauv kev kho, thiab lawv cov kev cuam tshuam rau kev kho yuav tsum nkag siab zoo thaum xaiv UV-LED qhov chaw.
LEDs yog Lambertian qhov chaw. Hauv lwm lo lus, txhua UV LED tso tawm cov khoom tso tawm rau pem hauv ntej thoob plaws 360 ° x 180 ° hemisphere. Ntau UV LEDs, txhua qhov ntawm qhov kev txiav txim ntawm ib millimeter square, yog teem rau hauv ib kab, ib tug matrix ntawm kab thiab kab, los yog ib co lwm yam configuration. Cov subassemblies no, hu ua modules lossis arrays, yog tsim los nrog qhov sib txawv ntawm LEDs uas ua kom muaj kev sib xyaw ntawm qhov sib txawv thiab ua kom yooj yim diode txias. Ntau lub modules lossis arrays yog tom qab ntawd muab tso rau hauv cov rooj sib txoos loj los tsim ntau qhov ntau thiab tsawg ntawm UV curing systems (Figures 4 thiab 5). Cov khoom siv ntxiv uas yuav tsum tau tsim kom muaj UV-LED curing system muaj xws li lub dab dej kub, lub qhov rais emitting, hluav taws xob tsav tsheb, DC fais fab mov, lub tshuab ua kua cua txias los yog chiller, thiab tib neeg tshuab interface (HMI).
PHAU 4 »LeoLED system rau lub vev xaib.
PHAU 5 »LeoLED system rau kev kub ceev ntau lub teeb teeb.
Vim UV-LED curing systems tsis radiate infrared wavelengths. Lawv inherently hloov cov thermal zog tsawg dua rau qhov chaw kho dua li cov mercury vapor teeb, tab sis qhov no tsis txhais hais tias UV LEDs yuav tsum raug suav hais tias yog cov tshuab txias txias. UV-LED curing systems tuaj yeem tso tawm qhov siab tshaj plaws irradiances, thiab ultraviolet wavelengths yog ib hom ntawm lub zog. Txawm li cas los xij cov zis tsis tau nqus los ntawm chemistry yuav ua kom sov rau hauv ib feem lossis substrate nrog rau cov khoom siv hauv ib puag ncig.
UV LEDs kuj yog cov khoom siv hluav taws xob uas tsis muaj txiaj ntsig uas tau tsav los ntawm cov khoom siv raw khoom siv hluav taws xob thiab kev tsim khoom nrog rau kev tsim khoom thiab cov khoom siv los ntim cov LEDs rau hauv chav kho kom zoo. Thaum qhov kub ntawm lub mercury vapor quartz raj yuav tsum nyob nruab nrab ntawm 600 thiab 800 ° C thaum lub sijhawm ua haujlwm, LED pn hlws ris kub yuav tsum nyob qis dua 120 ° C. Tsuas yog 35-50% ntawm cov hluav taws xob siv hluav taws xob ua rau UV-LED array hloov mus rau ultraviolet tso zis (hnyav wavelength nyob ntawm ntau). Tus so yog hloov mus rau hauv cov cua sov uas yuav tsum tau muab tshem tawm kom tswj tau qhov kev sib txuas qhov kub thiab txias thiab xyuas kom meej qhov system irradiance, lub zog ceev, thiab uniformity, nrog rau lub neej ntev. LEDs yog cov khoom siv hluav taws xob ua haujlwm ntev ntev, thiab kev sib koom ua ke LEDs rau hauv cov rooj sib txoos loj nrog cov qauv tsim thiab tswj kom zoo yog qhov tseem ceeb rau kev ua tiav lub neej ntev. Tsis yog txhua lub tshuab UV-kho tsis zoo ib yam, thiab tsis tsim nyog tsim thiab txias UV-LED curing systems muaj qhov tshwm sim ntau dua ntawm kev kub dhau thiab ua tsis tau zoo.
Arc / LED Hybrid Teeb
Nyob rau hauv txhua lub lag luam uas cov cuab yeej tshiab tau qhia los ua kev hloov pauv rau cov cuab yeej siv tam sim no, tuaj yeem muaj kev ntxhov siab txog kev saws me nyuam nrog rau kev tsis ntseeg txog kev ua haujlwm. Cov neeg siv muaj peev xwm feem ntau ncua kev saws me nyuam kom txog rau thaum cov ntaub ntawv tsim tau zoo, cov ntaub ntawv tshawb fawb tau luam tawm, cov ntawv pov thawj zoo pib nthuav dav hauv pawg, thiab / lossis lawv tau txais kev paub ua ntej lossis cov lus qhia los ntawm cov tib neeg thiab cov tuam txhab uas lawv paub thiab ntseeg. Cov ntaub ntawv pov thawj nyuaj feem ntau xav tau ua ntej tag nrho kev ua lag luam tag nrho relinquishes cov qub thiab tag nrho hloov mus rau qhov tshiab. Nws tsis pab tias cov dab neeg ua tiav zoo li yuav tsum tau ceev ceev cov lus zais thaum ntxov tsis xav kom cov neeg sib tw kom paub txog cov txiaj ntsig zoo sib xws. Yog li ntawd, ob qho tib si tiag thiab exaggerated tales ntawm kev poob siab tej zaum yuav reverberate thoob plaws hauv lub lag luam camouflaging qhov tseeb tsim nyog ntawm tshiab technology thiab ncua ncua kev saws me nyuam.
Thoob plaws hauv keeb kwm, thiab raws li kev tawm tsam rau qhov tsis kam txais yuav, hybrid designs tau nquag tau txais los ua tus choj hloov pauv ntawm cov neeg ua haujlwm thiab cov thev naus laus zis tshiab. Hybrids tso cai rau cov neeg siv kom tau txais kev ntseeg siab thiab txiav txim siab rau lawv tus kheej yuav ua li cas thiab thaum twg cov khoom tshiab lossis cov hau kev yuav tsum tau siv, yam tsis muaj kev txi tam sim no. Nyob rau hauv cov ntaub ntawv ntawm UV curing, ib tug hybrid system tso cai rau cov neeg siv kom sai thiab yooj yim pauv ntawm mercury vapor teeb thiab LED technology. Rau cov kab uas muaj ntau qhov chaw kho mob, hybrids tso cai rau cov xovxwm kom khiav 100% LED, 100% mercury vapor, lossis txhua qhov sib xyaw ntawm ob lub thev naus laus zis yog xav tau rau txoj haujlwm.
GEW muaj arc/LED hybrid systems rau web converters. Txoj kev daws teeb meem tau tsim los rau GEW lub khw loj tshaj plaws, lub vev xaib nqaim, tab sis cov qauv tsim hybrid kuj tau siv rau hauv lwm lub vev xaib thiab tsis siv lub vev xaib (Daim duab 6). Lub arc/LED suav nrog ib lub teeb lub taub hau uas muaj peev xwm ua tau raws li lub mercury vapor lossis LED cassette. Ob lub cassettes khiav tawm lub hwj chim universal thiab tswj qhov system. Kev txawj ntse nyob rau hauv lub kaw lus ua kom muaj kev sib txawv ntawm cov hom cassette thiab cia li muab lub zog tsim nyog, cua txias, thiab tus neeg teb xov tooj interface. Tshem tawm lossis txhim kho ib qho ntawm GEW's mercury vapor lossis LED cassettes feem ntau ua tiav hauv vib nas this siv ib qho Allen wrench.
PHAU 6 »Arc/LED system rau web.
Excimer Teeb
Excimer teeb yog ib hom roj-tso teeb uas emits quasi-monochromatic ultraviolet lub zog. Thaum lub teeb excimer muaj nyob rau hauv ntau lub wavelengths, cov khoom siv ultraviolet feem ntau yog nyob nruab nrab ntawm 172, 222, 308, thiab 351 nm. 172-nm excimer teeb poob hauv lub tshuab nqus tsev UV (100 txog 200 nm), thaum 222 nm tsuas yog UVC (200 txog 280 nm). 308-nm excimer teeb emit UVB (280 txog 315 nm), thiab 351 nm yog UVA (315 txog 400 nm).
172-nm nqus UV wavelengths luv dua thiab muaj zog ntau dua li UVC; Txawm li cas los xij, lawv tawm tsam kom nkag mus tob rau hauv cov khoom. Qhov tseeb, 172-nm wavelengths yog absorbed tag nrho nyob rau hauv sab saum toj 10 mus rau 200 nm ntawm UV-formulated chemistry. Raws li qhov tshwm sim, 172-nm excimer teeb yuav tsuas hla qhov chaw sab nraud ntawm UV cov qauv thiab yuav tsum tau muab tso ua ke nrog lwm cov khoom siv kho. Txij li thaum lub tshuab nqus tsev UV wavelengths kuj absorbed los ntawm huab cua, 172-nm excimer teeb yuav tsum tau ua nyob rau hauv ib tug nitrogen-inerted cua.
Feem ntau excimer teeb muaj ib lub raj quartz uas ua hauj lwm raws li ib tug dielectric barrier. Lub raj ntim nrog cov pa roj tsawg uas muaj peev xwm tsim tau excimer lossis exciplex molecules (Daim duab 7). Cov roj sib txawv tsim cov molecules sib txawv, thiab qhov sib txawv zoo siab molecules txiav txim siab lub wavelengths uas tawm los ntawm lub teeb. Lub high-voltage electrode khiav nyob rau hauv ntev ntawm lub quartz raj, thiab av electrodes khiav raws sab nraum ntev. Voltages yog pulsed rau hauv lub teeb ntawm high zaus. Qhov no ua rau cov hluav taws xob ntws mus rau hauv cov hluav taws xob sab hauv thiab tawm thoob plaws cov roj sib tov mus rau sab nraud hauv av electrodes. Qhov tshwm sim kev tshawb fawb no hu ua dielectric barrier discharge (DBD). Raws li electrons taug kev los ntawm cov pa roj, lawv cuam tshuam nrog atoms thiab tsim cov energized los yog ionized hom uas tsim excimer los yog exciplex molecules. Excimer thiab exciplex molecules muaj lub neej luv luv, thiab raws li lawv decompose los ntawm lub xeev zoo siab mus rau hauv av, photons ntawm ib tug quasi-monochromatic faib yog emissions.
PHAU 7 »Excimer teeb
Tsis zoo li mercury vapor teeb, qhov chaw ntawm lub teeb excimer lub quartz raj tsis kub. Yog li ntawd, feem ntau excimer teeb khiav nrog me ntsis-rau-tsis txias. Hauv lwm qhov xwm txheej, qhov qis qis yuav tsum tau ua kom txias uas feem ntau yog muab los ntawm cov pa nitrogen. Vim lub teeb lub thermal stability, excimer teeb yog instant 'ON / OFF' thiab yuav tsum tsis txhob sov-up los yog txias-down voj voog.
Thaum excimer teeb radiating ntawm 172 nm yog kev koom ua ke nrog ob qho tib si quasi-monochromatic UVA-LED-kho tshuab thiab broadband mercury vapor teeb, matting deg teebmeem raug tsim. UVA LED teeb yog thawj zaug siv los ua cov tshuaj chemical. Quasi-monochromatic excimer teeb yog tom qab ntawd siv los ua polymerize qhov chaw, thiab thaum kawg broadband mercury teeb hla mus rau lwm qhov ntawm chemistry. Qhov tshwj xeeb spectral outputs ntawm peb lub technologies siv nyob rau hauv cov theem sib cais muab cov txiaj ntsig kho qhov muag thiab kev ua haujlwm ntawm qhov chaw kho mob uas tsis tuaj yeem ua tiav nrog ib qho ntawm UV qhov chaw ntawm nws tus kheej.
Excimer wavelengths ntawm 172 thiab 222 nm kuj tseem muaj txiaj ntsig zoo ntawm kev rhuav tshem cov tshuaj lom neeg tsis zoo thiab cov kab mob tsis zoo, uas ua rau excimer teeb pom kev zoo rau kev ntxuav saum npoo, tshuaj tua kab mob, thiab kho lub zog saum npoo.
Teeb Lub Neej
Hais txog lub teeb lossis lub teeb lub neej, GEW lub teeb arc feem ntau mus txog 2,000 teev. Lub teeb lub neej tsis yog qhov tseeb, vim tias UV cov zis maj mam txo qis thaum lub sijhawm thiab cuam tshuam los ntawm ntau yam. Qhov tsim thiab zoo ntawm lub teeb, nrog rau kev ua haujlwm ntawm UV system thiab cov reactivity ntawm formulation teeb meem. Tsim kom raug UV tshuab xyuas kom meej tias lub hwj chim thiab qhov txias yuav tsum tau muab los ntawm lub teeb tshwj xeeb (lub teeb) tsim.
GEW-muab teeb (qhov muag teev) ib txwm muab lub neej ntev tshaj plaws thaum siv hauv GEW kho tshuab. Cov chaw muab khoom thib ob feem ntau rov qab kho lub teeb los ntawm cov qauv, thiab cov ntawv luam yuav tsis muaj qhov kawg haum, quartz txoj kab uas hla, cov ntsiab lus mercury, lossis cov roj sib xyaw, uas tuaj yeem cuam tshuam rau UV cov zis thiab hluav taws xob. Thaum tshav kub tiam tsis sib npaug tiv thaiv qhov system txias, lub teeb raug kev txom nyem nyob rau hauv ob qho tib si tso zis thiab lub neej. Cov teeb uas ua kom txias dua tawm UV tsawg dua. Cov teeb uas kub kub tsis kav ntev li ntev thiab warp ntawm qhov kub thiab txias.
Lub neej ntawm electrode arc teeb yog txwv los ntawm lub teeb kev khiav hauj lwm kub, tus naj npawb ntawm cov sij hawm khiav, thiab tus naj npawb ntawm pib lossis ntaus. Txhua lub sij hawm lub teeb raug ntaus nrog high-voltage arc thaum pib, me ntsis ntawm tungsten electrode hnav tam sim ntawd. Thaum kawg, lub teeb yuav tsis rov ua dua. Electrode arc teeb suav nrog cov txheej txheem kaw uas, thaum koom nrog, thaiv UV tso zis ua lwm txoj hauv kev rov ua dua lub teeb lub zog. Ntau reactive inks, coatings, thiab adhesives yuav ua rau lub teeb lub neej ntev dua; whereas, tsawg reactive formulations yuav xav tau ntau zaus hloov teeb.
UV-LED systems yog inherently ntev dua li cov pa roj teeb, tab sis UV-LED lub neej kuj tsis yog ib qho tseeb. Raws li cov teeb pom kev zoo, UV LEDs muaj kev txwv nyob rau hauv qhov nyuaj npaum li cas lawv tuaj yeem tsav tau thiab feem ntau yuav tsum ua haujlwm nrog qhov kub thiab txias hauv qab 120 ° C. Kev tsav tsheb dhau ntawm LEDs thiab cov LEDs qis qis yuav cuam tshuam lub neej, ua rau muaj kev puas tsuaj sai dua lossis kev puas tsuaj loj. Tsis yog txhua tus neeg muag khoom UV-LED tam sim no muab cov qauv tsim uas ua tau raws li qhov siab tshaj plaws tsim lub neej nyob rau ntau tshaj 20,000 teev. Cov txheej txheem tsim thiab tswj tau zoo dua yuav kav ntev dua 20,000 teev, thiab cov txheej txheem tsis zoo yuav ua tsis tiav hauv qhov rais luv luv. Qhov xwm zoo yog tias cov qauv tsim LED txuas ntxiv txhim kho thiab kav ntev dua nrog txhua qhov kev tsim qauv.
Ozon
Thaum luv luv UVC wavelengths cuam tshuam rau oxygen molecules (O2), lawv ua rau oxygen molecules (O2) faib ua ob lub atoms oxygen (O). Cov pa dawb atoms (O) ces sib tsoo nrog lwm cov pa molecules (O2) thiab tsim ozone (O3). Txij li thaum trioxygen (O3) tsis ruaj khov nyob rau hauv av theem dua li dioxygen (O2), ozone rov qab mus rau ib qho oxygen molecule (O2) thiab cov pa atom (O) raws li nws drifts los ntawm atmospheric huab cua. Dawb oxygen atoms (O) ces recombine nrog ib leeg nyob rau hauv lub tso pa system tsim oxygen molecules (O2).
Rau kev lag luam UV-kho daim ntaub ntawv, ozone (O3) yog tsim thaum atmospheric oxygen cuam tshuam nrog ultraviolet wavelengths qis dua 240 nm. Broadband mercury vapor-curing sources emit UVC ntawm 200 thiab 280 nm, uas overlaps ib feem ntawm ozone generating cheeb tsam, thiab excimer teeb emit nqus UV ntawm 172 nm los yog UVC ntawm 222 nm. Ozone tsim los ntawm mercury vapor thiab excimer curing teeb tsis ruaj khov thiab tsis muaj kev txhawj xeeb ib puag ncig, tab sis nws yog ib qho tsim nyog yuav tsum tau muab tshem tawm ntawm thaj chaw tam sim ntawd ib puag ncig cov neeg ua haujlwm vim tias nws yog ib qho ua pa ua pa thiab lom nyob rau theem siab. Txij li kev lag luam UV-LED curing systems emit UVA cov zis ntawm 365 thiab 405 nm, ozone tsis tsim.
Ozone muaj cov ntxhiab tsw zoo ib yam li cov ntxhiab tsw ntawm cov hlau, hluav taws kub, chlorine, thiab hluav taws xob spark. Tib neeg olfactory senses tuaj yeem ntes ozone qis li 0.01 txog 0.03 qhov chaw ib lab (ppm). Thaum nws txawv ntawm tus neeg thiab qib kev ua si, qhov ntau dua 0.4 ppm tuaj yeem ua rau muaj kev cuam tshuam ua pa thiab mob taub hau. Kev ua pa kom zoo yuav tsum tau nruab rau ntawm UV-kho kab kom txwv cov neeg ua haujlwm raug rau ozone.
UV-kho cov tshuab feem ntau yog tsim los kom muaj cov pa tawm thaum nws tawm ntawm lub taub hau teeb kom nws tuaj yeem raug tshem tawm ntawm cov neeg ua haujlwm thiab sab nraum lub tsev uas nws ib txwm lwj thaum muaj oxygen thiab hnub ci. Xwb, cov teeb tsis muaj ozone suav nrog cov khoom siv quartz uas thaiv ozone-tsim wavelengths, thiab cov chaw xav kom tsis txhob ducting lossis txiav qhov hauv lub ru tsev feem ntau siv cov ntxaij lim dej tawm ntawm cov kiv cua tawm.
Post lub sij hawm: Jun-19-2024
