Cov pa Mercury, lub teeb ci ntsa iab (LED), thiab excimer yog cov thev naus laus zis UV-curing sib txawv. Txawm hais tias peb yam no siv rau hauv ntau yam txheej txheem photopolymerization los sib txuas cov kua mem, cov txheej txheej, cov nplaum, thiab cov extrusions, cov txheej txheem tsim cov zog UV radiated, nrog rau cov yam ntxwv ntawm cov zis spectral sib xws, yog txawv kiag li. Kev nkag siab txog cov kev sib txawv no yog qhov tseem ceeb hauv kev siv thiab kev tsim cov mis, kev xaiv qhov chaw UV-curing, thiab kev koom ua ke.
Teeb Mercury Vapor
Ob lub teeb electrode arc thiab cov teeb microwave uas tsis muaj electrode poob rau hauv pawg ntawm mercury vapor. Mercury vapor teeb yog ib hom teeb nruab nrab-siab, roj-tso tawm uas muaj me ntsis ntawm cov mercury thiab cov roj inert raug vaporized rau hauv plasma hauv lub raj quartz kaw. Plasma yog cov roj ionized kub heev uas muaj peev xwm coj hluav taws xob. Nws yog tsim los ntawm kev siv hluav taws xob voltage ntawm ob lub electrodes hauv lub teeb arc lossis los ntawm microwave lub teeb electrode-less hauv lub qhov lossis qhov zoo sib xws hauv lub tswv yim zoo li lub qhov cub microwave hauv tsev. Thaum vaporized, mercury plasma emits broad-spectrum lub teeb hla ultraviolet, pom, thiab infrared wavelengths.
Yog hais tias lub teeb hluav taws xob arc, qhov hluav taws xob uas siv los ua kom lub raj quartz kaw muaj zog. Lub zog no ua rau cov mercury vaporizes mus rau hauv plasma thiab tso cov electrons los ntawm cov atoms vaporized. Ib feem ntawm cov electrons (-) ntws mus rau lub teeb lub electrode zoo tungsten lossis anode (+) thiab mus rau hauv lub UV system lub hluav taws xob circuit. Cov atoms uas muaj cov electrons tshiab ploj lawm dhau los ua cov cations (+) uas ntws mus rau lub teeb lub electrode tungsten lossis cathode (-). Thaum lawv txav mus, cations ntaus cov atoms neutral hauv cov roj sib tov. Qhov cuam tshuam hloov cov electrons los ntawm cov atoms neutral mus rau cations. Thaum cations tau txais electrons, lawv poob rau hauv lub xeev qis zog. Qhov sib txawv ntawm lub zog raug tso tawm ua cov photons uas tawm mus rau sab nraud ntawm lub raj quartz. Yog tias lub teeb muaj zog, txias kom raug, thiab ua haujlwm hauv nws lub neej siv tau, cov cations tshiab tsim (+) tas li gravitate mus rau lub electrode tsis zoo lossis cathode (-), ntaus ntau cov atoms thiab tsim cov teeb UV tas li. Cov teeb microwave ua haujlwm zoo sib xws tsuas yog tias microwaves, tseem hu ua xov tooj cua zaus (RF), hloov lub voj voog hluav taws xob. Vim tias cov teeb microwave tsis muaj cov electrodes tungsten thiab tsuas yog ib lub raj quartz kaw uas muaj mercury thiab inert gas, lawv feem ntau hu ua electrodeless.
Cov teeb ci UV uas muaj broadband lossis broad-spectrum mercury vapor lamps muaj ntau hom wavelengths xws li ultraviolet, visible, thiab infrared, thiab muaj ntau hom wavelengths sib npaug zos. Cov teeb ci ultraviolet no muaj ntau hom wavelengths xws li UVC (200 txog 280 nm), UVB (280 txog 315 nm), UVA (315 txog 400 nm), thiab UVV (400 txog 450 nm). Cov teeb uas muaj UVC hauv wavelengths qis dua 240 nm yuav tsim cov ozone thiab yuav tsum tau siv cov pa tawm los yog lim dej.
Qhov tso zis spectral rau lub teeb mercury vapor tuaj yeem hloov pauv los ntawm kev ntxiv me ntsis ntawm cov dopants, xws li: hlau (Fe), gallium (Ga), txhuas (Pb), tin (Sn), bismuth (Bi), lossis indium (In). Cov hlau ntxiv hloov pauv cov khoom sib xyaw ntawm cov plasma thiab, yog li ntawd, lub zog tso tawm thaum cations tau txais electrons. Cov teeb nrog cov hlau ntxiv hu ua doped, additive, thiab hlau halide. Feem ntau cov kua mem UV-formulated, coatings, adhesives, thiab extrusions yog tsim los phim cov zis ntawm cov qauv mercury- (Hg) lossis hlau- (Fe) doped teeb. Cov teeb hlau-doped hloov ib feem ntawm cov zis UV mus rau qhov ntev dua, ze-pom wavelengths, uas ua rau nkag mus zoo dua los ntawm cov qauv tuab dua, cov xim ntau. Cov qauv UV uas muaj titanium dioxide feem ntau kho tau zoo dua nrog cov teeb gallium (GA)-doped. Qhov no yog vim tias cov teeb gallium hloov ib feem tseem ceeb ntawm cov zis UV mus rau qhov ntev dua 380 nm. Vim tias cov khoom ntxiv titanium dioxide feem ntau tsis nqus lub teeb siab tshaj 380 nm, siv cov teeb gallium nrog cov qauv dawb tso cai rau ntau lub zog UV kom raug nqus los ntawm cov photoinitiators piv rau cov khoom ntxiv.
Cov qauv spectral muab rau cov neeg tsim qauv thiab cov neeg siv kawg nrog kev pom tseeb ntawm seb cov zis hluav taws xob rau ib qho kev tsim teeb tshwj xeeb tau faib thoob plaws hauv lub spectrum electromagnetic. Txawm hais tias cov mercury vaporized thiab cov hlau ntxiv tau txhais cov yam ntxwv hluav taws xob, qhov sib xyaw ua ke ntawm cov ntsiab lus thiab cov pa roj inert hauv lub raj quartz nrog rau kev tsim teeb thiab kev tsim kho lub cev kho txhua yam cuam tshuam rau UV tso zis. Cov zis spectral ntawm lub teeb tsis sib xyaw ua ke uas siv hluav taws xob thiab ntsuas los ntawm tus neeg muab teeb hauv huab cua qhib yuav muaj cov zis spectral sib txawv dua li lub teeb uas tau teeb tsa hauv lub taub hau teeb nrog lub reflector thiab txias tsim kom zoo. Cov qauv spectral muaj nyob ntawm cov neeg muab khoom UV system, thiab muaj txiaj ntsig zoo rau kev tsim cov qauv thiab kev xaiv teeb.
Ib daim duab qhia txog qhov sib xws ntawm cov spectral profile qhia txog qhov spectral irradiance ntawm y-axis thiab qhov wavelength ntawm x-axis. Qhov spectral irradiance tuaj yeem pom tau ntau txoj kev suav nrog qhov tseeb (piv txwv li W/cm2/nm) lossis qhov ntsuas tsis raws cai, piv txwv li, lossis normalized (tsis muaj chav). Cov profiles feem ntau qhia cov ntaub ntawv ua ib daim duab kab lossis ua daim duab bar uas muab cov zis tso rau hauv 10 nm bands. Daim duab qhia txog qhov tso zis ntawm mercury arc lamp hauv qab no qhia txog qhov sib piv ntawm qhov wavelength rau GEW cov kab ke (Daim Duab 1).
DUAB 1 »Cov duab qhia txog cov zis spectral rau mercury thiab hlau.
Lub teeb yog lo lus siv los hais txog lub raj quartz uas muaj UV tawm hauv Tebchaws Europe thiab Asia, thaum cov neeg Amelikas Qaum Teb thiab Qab Teb feem ntau siv lub qhov muag teeb thiab lub teeb sib hloov tau. Lub teeb thiab lub taub hau teeb ob leeg hais txog lub rooj sib dhos tag nrho uas muaj lub raj quartz thiab txhua yam khoom siv kho tshuab thiab hluav taws xob.
Teeb Electrode Arc
Cov tshuab teeb electrode arc muaj lub taub hau teeb, lub kiv cua txias lossis lub tshuab ua kom txias, lub zog fais fab, thiab lub tshuab sib txuas lus tib neeg (HMI). Lub taub hau teeb muaj lub teeb (lub teeb), lub iav tiv thaiv, lub plhaub hlau lossis lub tsev, lub qhov rooj kaw, thiab qee zaum lub qhov rais quartz lossis lub hlau tiv thaiv. GEW teeb tsa nws cov raj quartz, cov iav tiv thaiv, thiab cov txheej txheem kaw hauv cov khoom sib dhos uas tuaj yeem tshem tawm yooj yim ntawm lub plhaub taub hau teeb sab nraud lossis lub tsev. Kev tshem tawm lub cassette GEW feem ntau ua tiav hauv ob peb feeb siv ib lub Allen wrench. Vim tias qhov tso zis UV, qhov loj me thiab cov duab ntawm lub taub hau teeb, cov yam ntxwv ntawm lub cev, thiab cov khoom siv ntxiv sib txawv ntawm kev siv thiab kev ua lag luam, cov tshuab teeb electrode arc feem ntau yog tsim rau ib pawg ntawm cov kev siv lossis cov hom tshuab zoo sib xws.
Cov teeb mercury vapor tso tawm 360 ° ntawm lub teeb los ntawm lub raj quartz. Cov txheej txheem teeb arc siv cov reflectors nyob rau sab thiab tom qab ntawm lub teeb kom ntes thiab tsom ntau lub teeb mus rau qhov deb teev tseg nyob rau hauv pem hauv ntej ntawm lub taub hau teeb. Qhov deb no hu ua qhov tsom thiab yog qhov twg irradiance loj tshaj plaws. Cov teeb arc feem ntau tso tawm hauv qhov ntau ntawm 5 txog 12 W / cm2 ntawm qhov tsom. Txij li thaum kwv yees li 70% ntawm cov UV tso tawm los ntawm lub taub hau teeb los ntawm lub reflector, nws yog ib qho tseem ceeb kom khaws cov reflectors kom huv si thiab hloov lawv tsis tu ncua. Tsis ntxuav lossis hloov cov reflectors yog ib qho ua rau tsis txaus kho.
Tau ntau tshaj 30 xyoo, GEW tau txhim kho kev ua haujlwm ntawm nws cov kab ke kho kom zoo, kho cov yam ntxwv thiab cov zis kom tau raws li qhov xav tau ntawm cov ntawv thov thiab kev lag luam tshwj xeeb, thiab tsim cov khoom siv sib xyaw ua ke loj. Yog li ntawd, cov khoom lag luam niaj hnub no los ntawm GEW suav nrog cov qauv tsev me me, cov reflectors optimized rau UV reflectance ntau dua thiab txo infrared, cov txheej txheem integral integral shutter mechanisms, web skirts thiab slots, clam-shell web feeding, nitrogen inertion, positively pressurized heads, touch-screen operator interface, solid-state power supplies, kev ua haujlwm zoo dua, UV output monitoring, thiab remote system monitoring.
Thaum cov teeb hluav taws xob nruab nrab-siab khiav, qhov kub ntawm qhov chaw quartz yog nruab nrab ntawm 600 ° C thiab 800 ° C, thiab qhov kub ntawm cov plasma sab hauv yog ntau txhiab degrees centigrade. Cua yuam yog txoj hauv kev tseem ceeb los tswj qhov kub thiab txias ntawm lub teeb thiab tshem tawm qee lub zog infrared uas tawm los. GEW muab cov cua no tsis zoo; qhov no txhais tau tias cua raug rub los ntawm lub plhaub, raws li lub reflector thiab lub teeb, thiab tso tawm cov khoom sib dhos thiab deb ntawm lub tshuab lossis qhov chaw kho. Qee lub tshuab GEW xws li E4C siv cov kua txias, uas ua rau muaj cov zis UV ntau dua me ntsis thiab txo qhov loj ntawm lub taub hau teeb.
Cov teeb electrode arc muaj lub voj voog sov thiab txias. Cov teeb raug ntaus nrog qhov txias tsawg kawg nkaus. Qhov no tso cai rau cov plasma mercury kom nce mus rau qhov kub ua haujlwm xav tau, tsim cov electrons dawb thiab cations, thiab ua rau cov hluav taws xob ntws. Thaum lub taub hau teeb raug tua, qhov txias txuas ntxiv mus rau ob peb feeb kom txias lub raj quartz sib npaug. Lub teeb uas sov dhau yuav tsis rov ntaus dua thiab yuav tsum txuas ntxiv mus txias. Qhov ntev ntawm lub voj voog pib thiab txias, nrog rau qhov puas tsuaj ntawm cov electrodes thaum lub sijhawm txhua qhov hluav taws xob ntaus yog vim li cas cov txheej txheem pneumatic shutter yeej ib txwm koom ua ke rau hauv GEW electrode arc teeb sib dhos. Daim duab 2 qhia txog cua txias (E2C) thiab kua txias (E4C) electrode arc teeb.
DUAB 2 »Cov teeb electrode arc uas txias nrog kua (E4C) thiab cua txias (E2C).
Teeb LED UV
Cov semi-conductors yog cov khoom khov kho, cov khoom siv crystalline uas muaj qee yam conductive. Hluav taws xob ntws los ntawm semi-conductor zoo dua li cov insulator, tab sis tsis zoo li cov hlau conductor. Cov semi-conductors uas tshwm sim ntuj tab sis tsis ua haujlwm zoo suav nrog cov ntsiab lus silicon, germanium, thiab selenium. Cov semi-conductors tsim los rau kev tso zis thiab kev ua haujlwm zoo yog cov khoom sib xyaw nrog cov khoom tsis huv impregnated meej hauv cov qauv siv lead ua. Hauv cov ntaub ntawv ntawm UV LEDs, txhuas gallium nitride (AlGaN) yog cov khoom siv feem ntau siv.
Cov khoom siv hluav taws xob semi-conductors yog qhov tseem ceeb rau cov khoom siv hluav taws xob niaj hnub no thiab tau tsim los ua cov transistors, diodes, light-emitting diodes, thiab micro-processors. Cov khoom siv semi-conductor tau koom ua ke rau hauv cov hluav taws xob circuits thiab mounted hauv cov khoom xws li xov tooj ntawm tes, laptops, ntsiav tshuaj, khoom siv hluav taws xob, dav hlau, tsheb, chaw taws teeb controllers, thiab txawm tias cov khoom ua si rau 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 me me, nyias dua, sib dua, thiab pheej yig dua.
Hauv qhov xwm txheej tshwj xeeb ntawm LEDs, cov khoom siv semi-conductor uas tsim thiab ua tiav zoo tshaj plaws tso tawm cov kab sib txawv ntawm lub teeb thaum txuas nrog lub zog DC. Lub teeb tsuas yog tsim thaum tam sim no ntws los ntawm qhov anode zoo (+) mus rau qhov cathode tsis zoo (-) ntawm txhua LED. Vim tias cov zis LED tau tswj tau sai thiab yooj yim thiab quasi-monochromatic, LEDs zoo tagnrho rau kev siv ua: teeb qhia; cov teeb liab sib txuas lus infrared; backlighting rau TVs, laptops, ntsiav tshuaj, thiab xov tooj ntse; cov paib hluav taws xob, cov ntawv tshaj tawm, thiab jumbotrons; thiab UV kho.
Ib lub LED yog ib qho kev sib tshuam zoo-tsis zoo (pn junction). Qhov no txhais tau tias ib feem ntawm LED muaj qhov them zoo thiab hu ua anode (+), thiab lwm qhov muaj qhov them tsis zoo thiab hu ua cathode (-). Txawm hais tias ob sab yog cov khoom siv hluav taws xob sib xws, qhov ciam teb sib tshuam uas ob sab sib ntsib, hu ua thaj chaw depletion, tsis yog cov khoom siv hluav taws xob. Thaum lub davhlau ya nyob twg zoo (+) ntawm lub zog hluav taws xob ncaj qha (DC) txuas nrog anode (+) ntawm LED, thiab lub davhlau ya nyob twg tsis zoo (-) ntawm qhov chaw txuas nrog cathode (-), cov electrons uas muaj nqi tsis zoo hauv cathode thiab cov electrons uas muaj nqi zoo hauv anode raug thawb los ntawm lub zog hluav taws xob thiab thawb mus rau thaj chaw depletion. Qhov no yog kev cuam tshuam mus tom ntej, thiab nws muaj qhov cuam tshuam ntawm kev kov yeej ciam teb tsis muaj hluav taws xob. Qhov tshwm sim yog tias cov electrons dawb hauv thaj chaw n-hom hla thiab sau cov chaw tsis muaj hluav taws xob hauv thaj chaw p-hom. Thaum cov electrons ntws hla ciam teb, lawv hloov mus rau hauv lub xeev qis zog. Qhov poob qis hauv lub zog raug tso tawm los ntawm semi-conductor ua photons ntawm lub teeb.
Cov ntaub ntawv thiab cov dopants uas tsim cov qauv crystalline LED txiav txim siab qhov tso zis spectral. Niaj hnub no, cov khoom siv kho LED muaj nyob rau hauv kev lag luam muaj cov zis ultraviolet uas nyob nruab nrab ntawm 365, 385, 395, thiab 405 nm, qhov kev kam rau siab ib txwm ntawm ± 5 nm, thiab Gaussian spectral distribution. Qhov siab dua ntawm qhov siab tshaj plaws ntawm spectral irradiance (W / cm2 / nm), qhov siab dua ntawm qhov nkhaus tswb. Thaum UVC txoj kev loj hlob tseem tab tom ua ntawm 275 thiab 285 nm, qhov tso zis, lub neej, kev ntseeg siab, thiab tus nqi tseem tsis tau ua lag luam rau cov kab ke kho thiab daim ntawv thov.
Vim tias cov zis UV-LED tam sim no tsuas yog txwv rau cov wavelengths UVA ntev dua, lub kaw lus kho UV-LED tsis tso tawm cov zis spectral broadband ntawm cov teeb mercury vapor nruab nrab. Qhov no txhais tau tias cov kab ke kho UV-LED tsis tso tawm UVC, UVB, feem ntau pom lub teeb, thiab cov wavelengths infrared uas tsim cua sov. Thaum qhov no ua rau cov kab ke kho UV-LED siv tau rau hauv cov ntawv thov uas rhiab heev rau cua sov, cov kua mem, cov tshuaj pleev xim, thiab cov nplaum uas twb muaj lawm uas tsim rau cov teeb mercury nruab nrab yuav tsum tau hloov kho dua tshiab rau cov kab ke kho UV-LED. Hmoov zoo, cov neeg muab khoom siv tshuaj lom neeg tab tom tsim cov khoom siv kho ob npaug. Qhov no txhais tau tias cov qauv kho ob npaug uas npaj los kho nrog lub teeb UV-LED kuj tseem yuav kho nrog lub teeb mercury vapor (Daim Duab 3).
DUAB 3 »Daim ntawv qhia txog cov zis spectral rau LED.
GEW cov tshuab kho UV-LED tso tawm txog li 30 W/cm2 ntawm lub qhov rais emitting. Tsis zoo li cov teeb electrode arc, cov tshuab kho UV-LED tsis muaj cov reflectors uas coj cov teeb ci mus rau qhov chaw tsom. Yog li ntawd, UV-LED qhov siab tshaj plaws irradiance tshwm sim ze rau lub qhov rais emitting. Cov teeb UV-LED uas tso tawm sib txawv ntawm ib leeg thaum qhov deb ntawm lub taub hau teeb thiab qhov chaw kho nce ntxiv. Qhov no txo qhov concentration ntawm lub teeb thiab qhov loj ntawm irradiance uas ncav cuag qhov chaw kho. Txawm hais tias qhov siab tshaj plaws irradiance yog qhov tseem ceeb rau kev sib txuas, qhov irradiance siab dua tsis yog ib txwm muaj txiaj ntsig thiab tuaj yeem tiv thaiv qhov ceev ntawm kev sib txuas ntau dua. Wavelength (nm), irradiance (W/cm2) thiab lub zog ceev (J/cm2) txhua tus ua lub luag haujlwm tseem ceeb hauv kev kho, thiab lawv cov kev cuam tshuam rau kev kho yuav tsum tau nkag siab zoo thaum xaiv qhov chaw UV-LED.
Cov LEDs yog cov chaw Lambertian. Hauv lwm lo lus, txhua lub UV LED emits cov zis tawm mus rau pem hauv ntej thoob plaws tag nrho 360 ° x 180 ° hemisphere. Ntau lub UV LEDs, txhua qhov kev txiav txim ntawm ib millimeter square, tau teeb tsa hauv ib kab, ib lub matrix ntawm kab thiab kem, lossis qee qhov kev teeb tsa lwm yam. Cov subassemblies no, hu ua modules lossis arrays, tau tsim nrog qhov sib nrug ntawm LEDs uas ua kom muaj kev sib xyaw ntawm qhov sib txawv thiab pab txhawb kev txias diode. Ntau lub modules lossis arrays tau teeb tsa hauv cov rooj sib txoos loj dua los tsim ntau qhov ntau thiab tsawg ntawm UV curing systems (Daim Duab 4 thiab 5). Cov khoom ntxiv uas xav tau los tsim lub UV-LED curing system suav nrog lub dab dej kub, lub qhov rais emitting, cov tsav tsheb hluav taws xob, DC fais fab mov, lub kaw lus txias kua lossis chiller, thiab lub tshuab tib neeg (HMI).
DUAB 4 »Lub LeoLED system rau web.
DUAB 5 »Lub kaw lus LeoLED rau kev teeb tsa ntau lub teeb ceev ceev.
Vim tias cov tshuab kho UV-LED tsis tso tawm cov wavelengths infrared. Lawv hloov pauv lub zog thermal tsawg dua mus rau qhov chaw kho dua li cov teeb mercury vapor, tab sis qhov no tsis tau txhais hais tias UV LEDs yuav tsum raug suav hais tias yog thev naus laus zis kho txias. Cov tshuab kho UV-LED tuaj yeem tso tawm cov teeb ci siab heev, thiab cov wavelengths ultraviolet yog ib hom zog. Txhua yam khoom tso tawm uas tsis raug nqus los ntawm cov tshuaj lom neeg yuav ua rau qhov chaw hauv qab lossis cov khoom siv hauv qab nrog rau cov khoom siv hauv tshuab ib puag ncig sov.
UV LEDs kuj yog cov khoom siv hluav taws xob uas tsis muaj txiaj ntsig los ntawm kev tsim thiab tsim cov semi-conductor raw nrog rau cov txheej txheem tsim khoom thiab cov khoom siv siv los ntim cov LEDs rau hauv chav kho loj dua. Txawm hais tias qhov kub ntawm lub raj mercury vapor quartz yuav tsum tuav ntawm 600 thiab 800 ° C thaum lub sijhawm ua haujlwm, qhov kub ntawm LED pn junction yuav tsum nyob hauv qab 120 ° C. Tsuas yog 35-50% ntawm cov hluav taws xob uas siv hluav taws xob rau UV-LED array hloov mus rau cov zis ultraviolet (nyob ntawm qhov wavelength heev). Tus so hloov mus rau hauv cua sov thermal uas yuav tsum tau tshem tawm kom tswj tau qhov kub ntawm qhov sib koom ua ke thiab xyuas kom meej tias lub kaw lus irradiance, lub zog ceev, thiab kev sib xws, nrog rau lub neej ntev. LEDs yog cov khoom siv solid-state ntev, thiab kev koom ua ke LEDs rau hauv cov rooj sib txoos loj dua nrog cov txheej txheem txias tsim thiab tswj hwm zoo yog qhov tseem ceeb rau kev ua tiav cov lus qhia ntev. Tsis yog txhua lub tshuab UV-curing zoo ib yam, thiab cov txheej txheem UV-LED curing uas tsim thiab txias tsis raug muaj feem ntau ntawm kev kub dhau thiab ua tsis tiav.
Teeb Arc/LED Sib Xyaws
Hauv txhua lub khw uas muaj cov thev naus laus zis tshiab los hloov cov thev naus laus zis uas twb muaj lawm, tej zaum yuav muaj kev ntshai txog kev siv thiab kev tsis ntseeg txog kev ua tau zoo. Cov neeg siv feem ntau ncua kev siv kom txog thaum muaj lub hauv paus teeb tsa zoo, cov ntaub ntawv tshawb fawb tau luam tawm, cov lus pov thawj zoo pib ncig mus rau hauv pawg, thiab/lossis lawv tau txais kev paub dhau los lossis cov ntaub ntawv los ntawm cov tib neeg thiab cov tuam txhab uas lawv paub thiab ntseeg siab. Feem ntau yuav tsum muaj pov thawj ruaj khov ua ntej tag nrho lub khw tso tseg cov qub thiab hloov mus rau qhov tshiab. Nws tsis pab tias cov dab neeg ua tiav feem ntau yog cov lus zais cia vim tias cov neeg siv thaum ntxov tsis xav kom cov neeg sib tw tau txais txiaj ntsig zoo sib xws. Yog li ntawd, ob qho tib si cov dab neeg tiag tiag thiab cov dab neeg hais txog kev poob siab qee zaum tuaj yeem cuam tshuam thoob plaws hauv kev lag luam zais qhov tseeb ntawm cov thev naus laus zis tshiab thiab ncua kev siv ntxiv.
Thoob plaws keeb kwm, thiab ua ib qho kev tawm tsam rau kev tsis kam lees txais, cov qauv tsim sib xyaw feem ntau tau txais kev lees paub ua tus choj hloov pauv ntawm cov thev naus laus zis tam sim no thiab cov thev naus laus zis tshiab. Cov sib xyaw ua ke tso cai rau cov neeg siv kom muaj kev ntseeg siab thiab txiav txim siab rau lawv tus kheej yuav siv cov khoom tshiab lossis cov txheej txheem li cas thiab thaum twg, yam tsis muaj kev txi cov peev xwm tam sim no. Hauv qhov xwm txheej ntawm UV kho, lub kaw lus sib xyaw ua ke tso cai rau cov neeg siv hloov pauv sai thiab yooj yim ntawm cov teeb mercury vapor thiab thev naus laus zis LED. Rau cov kab uas muaj ntau qhov chaw kho, cov sib xyaw ua ke tso cai rau cov xovxwm kom khiav 100% LED, 100% mercury vapor, lossis txhua yam kev sib xyaw ntawm ob lub thev naus laus zis uas xav tau rau ib txoj haujlwm.
GEW muaj cov tshuab arc/LED hybrid rau cov web converters. Cov kev daws teeb meem no tau tsim los rau GEW lub khw loj tshaj plaws, narrow-web label, tab sis qhov kev tsim hybrid kuj siv tau rau lwm cov web thiab cov ntawv thov tsis yog web (Daim Duab 6). Lub arc/LED muaj lub taub hau teeb uas tuaj yeem haum rau lub mercury vapor lossis LED cassette. Ob lub cassettes khiav tawm ntawm lub zog thoob ntiaj teb thiab kev tswj hwm. Kev txawj ntse hauv lub kaw lus ua rau muaj kev sib txawv ntawm cov hom cassette thiab muab lub zog, txias, thiab tus neeg teb xov tooj interface. Kev tshem tawm lossis kev teeb tsa ib qho ntawm GEW lub mercury vapor lossis LED cassettes feem ntau ua tiav hauv vib nas this siv ib lub Allen wrench.
DUAB 6 »Arc/LED system rau web.
Cov Teeb Excimer
Cov teeb Excimer yog ib hom teeb roj uas tso tawm lub zog ultraviolet quasi-monochromatic. Txawm hais tias cov teeb excimer muaj nyob rau hauv ntau qhov wavelengths, cov zis ultraviolet feem ntau yog nyob rau hauv 172, 222, 308, thiab 351 nm. Cov teeb excimer 172-nm poob rau hauv lub tshuab nqus tsev UV band (100 txog 200 nm), thaum 222 nm tsuas yog UVC (200 txog 280 nm). Cov teeb excimer 308-nm tso tawm UVB (280 txog 315 nm), thiab 351 nm yog UVA (315 txog 400 nm).
Cov wavelengths UV nqus tsev 172-nm luv dua thiab muaj zog ntau dua li UVC; txawm li cas los xij, lawv nyuaj rau nkag mus tob rau hauv cov tshuaj. Qhov tseeb, wavelengths 172-nm raug nqus tag nrho hauv 10 txog 200 nm ntawm cov tshuaj UV-formulated. Yog li ntawd, 172-nm excimer teeb yuav tsuas yog hla qhov chaw sab nraud ntawm UV formulations thiab yuav tsum tau koom ua ke nrog lwm cov khoom siv kho. Txij li thaum cov wavelengths UV nqus tsev kuj raug nqus los ntawm huab cua, 172-nm excimer teeb yuav tsum tau ua haujlwm hauv huab cua nitrogen-inerted.
Feem ntau cov teeb excimer muaj ib lub raj quartz uas ua haujlwm ua ib qho dielectric barrier. Lub raj puv nrog cov pa roj tsawg uas muaj peev xwm tsim cov excimer lossis exciplex molecules (Daim Duab 7). Cov pa roj sib txawv tsim cov molecules sib txawv, thiab cov molecules excited sib txawv txiav txim siab seb qhov wavelengths twg yog emitted los ntawm lub teeb. Ib lub electrode high-voltage khiav raws qhov ntev sab hauv ntawm lub raj quartz, thiab cov electrodes av khiav raws qhov ntev sab nraud. Cov hluav taws xob raug pulsed rau hauv lub teeb ntawm cov zaus siab. Qhov no ua rau cov electrons ntws hauv lub electrode sab hauv thiab tso tawm hla cov roj sib tov mus rau cov electrodes av sab nraud. Qhov xwm txheej scientific no hu ua dielectric barrier discharge (DBD). Thaum cov electrons taug kev hla cov roj, lawv cuam tshuam nrog cov atoms thiab tsim cov hom energized lossis ionized uas tsim cov excimer lossis exciplex molecules. Excimer thiab exciplex molecules muaj lub neej luv heev, thiab thaum lawv decompose los ntawm lub xeev excited mus rau lub xeev av, photons ntawm quasi-monochromatic faib tawm raug tso tawm.
DUAB 7 »Lub teeb Excimer
Tsis zoo li cov teeb mercury vapor, qhov saum npoo ntawm lub raj quartz ntawm lub teeb excimer tsis kub. Yog li ntawd, feem ntau cov teeb excimer khiav nrog me ntsis lossis tsis muaj kev txias. Hauv lwm qhov xwm txheej, xav tau qib txias qis uas feem ntau yog muab los ntawm cov pa nitrogen. Vim yog lub teeb lub thermal stability, cov teeb excimer yog tam sim ntawd 'ON / OFF' thiab tsis tas yuav tsum tau sov lossis txias-down voj voog.
Thaum cov teeb excimer uas tawm ntawm 172 nm raug sib xyaw ua ke nrog ob qho tib si quasi-monochromatic UVA-LED-curing systems thiab broadband mercury vapor lamps, cov teebmeem ntawm qhov chaw matting raug tsim tawm. Cov teeb UVA LED raug siv thawj zaug los gel cov tshuaj lom neeg. Cov teeb excimer quasi-monochromatic ces raug siv los polymerize qhov chaw, thiab thaum kawg broadband mercury lamps crosslink lwm yam tshuaj lom neeg. Cov zis spectral tshwj xeeb ntawm peb cov thev naus laus zis siv rau hauv cov theem sib cais muab cov txiaj ntsig zoo rau kev kho qhov muag thiab kev ua haujlwm ntawm qhov chaw uas tsis tuaj yeem ua tiav nrog ib qho ntawm cov chaw UV ntawm nws tus kheej.
Cov nthwv dej Excimer ntawm 172 thiab 222 nm kuj tseem muaj txiaj ntsig zoo rau kev rhuav tshem cov khoom phom sij thiab cov kab mob tsis zoo, uas ua rau cov teeb excimer siv tau rau kev ntxuav qhov chaw, kev tua kab mob, thiab kev kho lub zog ntawm qhov chaw.
Lub Neej Teeb
Hais txog lub neej ntawm lub teeb lossis lub qhov muag teeb, GEW lub teeb arc feem ntau siv tau txog li 2,000 teev. Lub neej ntawm lub teeb tsis yog qhov tseeb, vim tias cov zis UV maj mam txo qis zuj zus thiab raug cuam tshuam los ntawm ntau yam. Kev tsim qauv thiab qhov zoo ntawm lub teeb, nrog rau qhov xwm txheej ua haujlwm ntawm lub kaw lus UV thiab kev ua haujlwm ntawm cov tshuaj muaj feem cuam tshuam. Cov kab ke UV uas tsim tau zoo ua kom ntseeg tau tias muaj lub zog thiab cua txias raws li qhov tsim teeb (qhov muag teeb) tshwj xeeb.
Cov teeb (teeb) uas GEW muab rau yeej ib txwm siv tau ntev tshaj plaws thaum siv rau hauv cov txheej txheem kho GEW. Cov chaw muab khoom thib ob feem ntau tau hloov kho lub teeb los ntawm cov qauv, thiab cov ntawv theej yuav tsis muaj qhov sib xws ntawm qhov kawg, txoj kab uas hla quartz, cov ntsiab lus mercury, lossis cov roj sib xyaw, uas tuaj yeem cuam tshuam rau qhov tso zis UV thiab kev tsim cua sov. Thaum qhov tsim cua sov tsis sib npaug rau qhov txias ntawm lub kaw lus, lub teeb yuav tsis zoo hauv ob qho tib si qhov tso zis thiab lub neej. Cov teeb uas khiav txias dua tso tawm UV tsawg dua. Cov teeb uas khiav kub dua tsis kav ntev thiab khoov ntawm qhov kub siab.
Lub neej ntawm cov teeb electrode arc raug txwv los ntawm qhov kub thiab txias ntawm lub teeb, pes tsawg teev khiav, thiab pes tsawg zaus pib lossis tawm tsam. Txhua zaus lub teeb raug ntaus nrog lub zog siab arc thaum lub sijhawm pib, ib qho ntawm cov tungsten electrode hnav tawm. Thaum kawg, lub teeb yuav tsis rov tawm tsam. Cov teeb electrode arc muaj cov txheej txheem kaw uas, thaum koom nrog, thaiv cov zis UV ua lwm txoj hauv kev rau kev rov ua dua lub zog ntawm lub teeb. Cov kua mem reactive ntau dua, cov txheej txheem, thiab cov nplaum yuav ua rau lub neej teeb ntev dua; thaum, cov qauv tsis tshua muaj reactive yuav xav tau kev hloov teeb ntau zaus.
Cov kab ke UV-LED muaj lub neej ntev dua li cov teeb ib txwm muaj, tab sis lub neej UV-LED kuj tsis yog qhov tseeb. Ib yam li cov teeb ib txwm muaj, UV LEDs muaj kev txwv hauv qhov nyuaj npaum li cas lawv tuaj yeem tsav thiab feem ntau yuav tsum ua haujlwm nrog qhov kub ntawm qhov sib txuas hauv qab 120 ° C. Cov LEDs tsav dhau thiab cov LEDs txias dhau yuav ua rau lub neej puas tsuaj, ua rau muaj kev puas tsuaj sai dua lossis kev puas tsuaj loj heev. Tsis yog txhua tus neeg muab khoom UV-LED system tam sim no muab cov qauv tsim uas ua tau raws li lub neej siab tshaj plaws hauv ntau tshaj 20,000 teev. Cov kab ke zoo dua thiab tswj hwm yuav kav ntev tshaj 20,000 teev, thiab cov kab ke qis dua yuav ua tsis tiav hauv lub qhov rais luv dua. Qhov xov xwm zoo yog tias cov qauv tsim LED system txuas ntxiv txhim kho thiab kav ntev dua nrog txhua qhov kev tsim qauv rov ua dua.
Ozone
Thaum cov UVC wavelengths luv dua cuam tshuam rau cov pa oxygen molecules (O2), lawv ua rau cov pa oxygen molecules (O2) faib ua ob lub oxygen atoms (O). Cov pa oxygen atoms dawb (O) ces sib tsoo nrog lwm cov pa oxygen molecules (O2) thiab tsim ozone (O3). Vim tias trioxygen (O3) tsis ruaj khov ntawm av dua li dioxygen (O2), ozone yooj yim rov qab mus rau cov pa oxygen molecule (O2) thiab cov pa oxygen atom (O) thaum nws ntws los ntawm huab cua. Cov pa oxygen atoms dawb (O) ces rov sib xyaw ua ke hauv lub tshuab tso pa tawm los tsim cov pa oxygen molecules (O2).
Rau cov ntawv thov UV-curing hauv kev lag luam, ozone (O3) raug tsim tawm thaum cov pa oxygen hauv huab cua cuam tshuam nrog cov ultraviolet wavelengths hauv qab 240 nm. Cov chaw kho mob broadband mercury vapor tso tawm UVC ntawm 200 thiab 280 nm, uas sib tshooj ib feem ntawm thaj chaw tsim ozone, thiab cov teeb excimer tso tawm vacuum UV ntawm 172 nm lossis UVC ntawm 222 nm. Ozone tsim los ntawm mercury vapor thiab excimer curing teeb tsis ruaj khov thiab tsis yog qhov teeb meem loj rau ib puag ncig, tab sis nws yog qhov tsim nyog uas nws yuav tsum tau tshem tawm ntawm thaj chaw nyob ib puag ncig cov neeg ua haujlwm vim nws yog qhov ua rau ua pa tsis zoo thiab lom ntawm qib siab. Txij li thaum cov tshuab kho UV-LED lag luam tso tawm UVA tso tawm ntawm 365 thiab 405 nm, ozone tsis raug tsim tawm.
Ozone muaj ntxhiab zoo ib yam li ntxhiab hlau, xov hlau kub hnyiab, chlorine, thiab hluav taws xob. Tib neeg lub qhov muag pom tau ozone tsawg li 0.01 txog 0.03 feem ib lab (ppm). Txawm hais tias nws txawv ntawm tus neeg thiab qib kev ua ub no, qhov concentration ntau dua 0.4 ppm tuaj yeem ua rau muaj kev cuam tshuam tsis zoo rau kev ua pa thiab mob taub hau. Yuav tsum tau muab qhov cua kom zoo rau ntawm cov kab UV-curing kom txwv tsis pub cov neeg ua haujlwm raug ozone.
Cov tshuab UV-curing feem ntau yog tsim los kom tswj cov pa tawm thaum nws tawm hauv lub teeb taub hau kom nws tuaj yeem raug xa mus deb ntawm cov neeg ua haujlwm thiab sab nraum lub tsev qhov twg nws lwj tag thaum muaj cov pa oxygen thiab tshav ntuj. Xwb, cov teeb uas tsis muaj ozone muaj cov khoom siv quartz uas thaiv cov wavelengths tsim ozone, thiab cov chaw xav kom tsis txhob muaj ducting lossis txiav qhov hauv lub ru tsev feem ntau siv cov lim dej ntawm qhov tawm ntawm cov kiv cua tso pa tawm.
Lub sijhawm tshaj tawm: Lub Rau Hli-19-2024
