Cov cheebtsam uas tsim cov UV number case thiab lawv cov teebmeem
Peb yog ib lub tuam txhab luam ntawv loj hauv Shenzhen Tuam Tshoj. Peb muaj cov phau ntawv luam tawm, phau ntawv xov xwm luam ntawv, phau ntawv luam ntawv, phau ntawv nyuaj, phau ntawv luam tawm, phau ntawv luam tawm, phau ntawv luam tawm, lub thawv ntim, daim qhia ntawv, txhua yam ntawm PVC, cov ntawv luam tawm, ntawv sau cia, hom tshwj xeeb ntawv xim luam tawm khoom, kev ua si cardand li ntawd.
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Lub ntsiab ntawm UV tus cwj pwm tseem ceeb yog cov polymerizable prepolymer, ib tus duab ci, ib lub duab, ib qho kev tiv thaiv, ib qho xim xim, ib qho av, ib qho khoom ntxiv (tus neeg saib xyuas kev sib txuas, tus kab mob polymerization inhibitor), thiab cov zoo li.
1. Polymeric prepolymer
Lub polymerizable prepolymer yog ib qho tseem ceeb ntawm kev txiav txim ntawm kev ua tiav ntawm UV varnish txheej. Nws yog qhov tseem ceeb tshaj plaws hauv daim UV number case thiab yog cov yeeb yaj kiab. Kev ua yeeb yam tseem ceeb heev hauv txoj kev curing thiab cov khoom ntawm tus cwj pwm zaj duab xis tom qab kho. Feem ntau raug tso dej num raws li lub cev pob txha. Lub cev pob txha muaj feem xyuam xim txheej, ua kom tsis muaj zog, ua kom tsis muaj zog, ua haujlwm tsis haum, tshuaj ua haujlwm, thiab dej tsis haum.
Tus prepolymer yog structurally lub cev tsis muaj molecular resin uas muaj ib qho "C = C" unsaturated ob leeg bond, xws li acryloyl pawg, ib pawg methyl acrylate, ib pab pawg vinyl, ib pawg allyl lossis cov zoo li. Muaj cov tshuaj reinhin ntau hom xws li epoxy acrylate resin, urethane acrylate cob, polyester acrylate cob, polyester acrylic cob, polypropyl acrylate, thiab unsaturated polyester cob. Nyob rau hauv tib lub tej yam kev mob, qhov ceev ceev photocuring yog tus ceev tshaj plaws, yog li cov oligomers yog feem ntau acrylic resins.
2. Cov duab yeeb yaj duab (xim tsis sib haum)
UV number case thiab UV varnish yuav tsum muaj viscosity ntawm txheej tshuab thaum txheej, feem ntau los ntawm kev ntxiv 20% rau 80% ntawm tus monomer los txo cov viscosity ntawm lub prepolymer, thiab monomer xwb polymerizes ua ib zaj duab xis kho. feem.
Reactive diluent, tseem hu ua cross-linking monomer, yog ib lub qhov muaj zog monomer nws lub luag hauj lwm nyob hauv tus cwj pwm yog kho cov viscosity, kho ceev thiab kho cov duab ntawm tus cwj mem. Cov lus tsis txaus ntseeg kuj tseem muaj "C = C" unsaturated ob leeg nyiaj uas yog ib pawg neeg acryloyl, ib pawg methyl propyl acyl, ib pab pawg neeg yas thiab ib pab pawg neeg. Hauv qhov tseeb ntawm qhov tseeb tias qhov ntaus nqi ntawm acryloyl yog qhov ceev tshaj, feem ntau ntawm cov kev siv tshuaj tiv thaiv tam sim no yog siv cov kab mob acrylate. Vim yog qhov txawv ntawm cov pawg neeg acryloyl, lawv tuaj yeem faib ua peb hom: pawg ua ke thiab cov pab pawg sib txawv. Txoj kev tso cov nyhav thiab kev kho kom ceev ntawm ntau yam kev ua haujlwm hauv cov pawg neeg sib txawv yog txawv. Nyob rau hauv dav dav, qhov ntau lub functionality, qhov sai dua tus kho, tab sis qhov zuj zus qhov dilution.
Cov tshuaj tua kabmob xws li styrene, thawj caug acrylate monomers, thiab lwm yam., Yog cov tshuaj lom, thiab qee cov acrylate monomers muaj khaus khaus ntawm cov tawv nqaij. Yuav kom txo tau qhov tawv nqaij ntawm cov tawv nqaij tsis sib haum, feem ntau yog ob txoj kev: ib qho yog siv cov ethylene oxide, propylene oxide thiab hexyl ester lub nplhaib qhib lub cev polymerization kom muaj qhov hnyav ntawm molecular ntawm monomer; qhov thib ob yog hloov cov qauv monomer ester; Tus tsiaj yog qhov hloov ntawm txoj kev haus cawv yav dhau los. Thaum haus cawv ntxiv rau pawg neeg acryloyl, qhov tawv nqaij khaus ntawm lub tshuab polyfunctional zoo heev. Piv txwv, thaum neopentyl glycol diacrylate esterified, tus nqi pH (tawv tsom xam cov tawv nqaij) yog 4.96, thiab Thaum muab ua ke, pH poob rau 0.3.
Tsis ntev tas los no, muaj qee tus cwj pwm ua tau zoo, xws li: alkoxy acrylates, carbonic acid monoacrylates, imidazolyl monoacrylates, cyclic carbonate monoacrylates, epoxy silicone monomers, silicone acrylics. Ester thiab yas ether monomers. Thaum xaiv ib lub monomer, ua raws li cov qauv no:
a, tsawg viscosity, zoo dilution effect;
b, tua kho ceev;
c, zoo adhesion rau cov khoom;
d, nws tsis khaus rau ntawm daim tawv nqaij thiab tsis tshua muaj tshuaj lom;
e, tsis muaj tus ntxhiab nyob hauv lub txheej.
3, photoinitiator
Tus yees duab yog ib yam khoom uas ua rau lub zog hluav taws xob thiab muaj kev hloov tshuaj los ntawm kev tsim kom muaj lub cev muaj zog nrog rau kev pib muaj peev xwm, thiab yog ib qho tseem ceeb rau kev tsim kho UV. Photoinitiators tau muab faib ua hom tshuaj hydrogen sau thiab hom pyrolysis; hydrogen abstraction hom xav tau kev koom tes nrog ib qho chaw uas muaj cov dej uas muaj roj (feem ntau hu ua co-initiator) los ua ib qho dawb radical los ntawm cov tshuaj tiv thaiv hydrogen abstraction, uas yog ib lub duab yees duab bimolecular. Lub hom tshuaj cleavage yog ib tug yees duab nkaus xwb uas yog decomposed rau hauv radical nyob rau hauv ib qho molecule tom qab raug rau irradiation irradiation.
(1) Hydrogen abstraction hom: Kev noj tshuaj xylene ketone (BP) ua piv txwv, thaum benzophenone yog siv ib leeg xwb, olefinic monomer tsis tuaj yeem muab yees duab, thiab qhov yuav tsum ua kom nws yog ib tug yees duab. Cov tshuaj tiv thaiv mechanism yog sib txawv alkil thiab aryl pawg. Thaum extracting hydrogen atoms los ntawm alcohols thiab ethers, oxygen yooj yim quenches zoo siab xeev ntawm benzophenone. Thaum ib hom tshuaj hydrogen atom tau txais los ntawm ib qho tshuaj amine, vim cov ketone tuaj ua rau lub xeev muaj kev zoo siab nrog cov amine tam sim ntawd tom qab kev txaus siab lub xeev tsim, lub zog hloov mus rau oxygen molecule yog zam, yog li ntawd cov amine system tsis yooj yim quenched by oxygen, piv nrog cov dej cawv (ether system). Nws kuj txo cov hom kev hloov mus rau lub monomer. Yog li ntawd, nyob rau hauv cov ntaub ntawv, ib qho amine system feem ntau ua hauj lwm. Ntxiv rau benzophenone, xws li yees duab thaij duab kuj yog terpenoid thioxanthone, xws li 2-isopropyl thioxanthone, uas feem ntau siv hauv UV dua.
(2) Pyrolysis hom: Kev siv benzoin ether ua piv txwv, benzoin ether yog cov khoom siv dav tshaj plaws, uas yog yus lub plhu ncaj qha ntawm lub xeev muaj siab gram hauv ob qho tag nrho cov dawb radicals. Lub resulting radicals tau tag nrho pib polymerization ntawm lub monomers. Lub benzoin ether muaj lub neej luv luv, tsis yooj yim quenched by oxygen, thiab tsis tau quenched los ntawm styrene, ces nws yuav siv rau lub polymerization ntawm styrene. Txawm li cas los, benzoin ether nyias muaj nyias qhov txawv ntawm cov thermal decomposition txawm hais tias nws tsis pom teeb, thiab qhov chaw ruaj ntseg tsis zoo. Feem ntau, cov tshuaj tiv thaiv thiab cov tshuaj tiv thaiv kab mob polymerization ntxiv tau ntxiv. Tam sim no, nws yog nquag siv ua benzoin.
Cov hauv paus ntsiab lus raws li thaum xaiv tus kws yees duab duab:
a, kev ua haujlwm siab ntawm kev nqhis dej nyob hauv UV ntau;
b, kuj ruaj khov;
c, tsawg tus nqi.
4, lwm yam khoom siv ntxiv
Additives yog siv los txhim kho kev ua haujlwm zoo. Cov additives feem ntau siv hauv UV inks yog stabilizers, leveling agents, defoamers, dispersants, waxes, thiab lwm yam.
(1) Stabilizer: Stabilizer siv los txo kom sov thermal polymerization thaum lub sij hawm cia thiab txhim kho ink number case stability. Feem ntau siv hydroquinone, p-methoxyphenol, p-benzoquinone, 2,6-di-tert-butyl cresol thiab cov zoo li.
(2) Tus neeg saib xyuas raws qib siab: Tus neeg saib xyuas qib siab yuav siv los txhim kho qib ntawm lub plhaub txheej, tiv thaiv qhov tshwm sim ntawm qhov chaw ntswj, tus npliag xim ntawm cov cuav pliav, thiab ntxiv cov gloss ntawm number case printing.
(3) Cov neeg siv tshuaj tua kabmob: Tus neeg ua npau ntu yog siv los txhim kho lub plav ntawm lub plhaub txheej, tiv thaiv qhov tshwm sim ntawm cov kabmob nrawm, nplij lub npoo zaj duab xis, thiab ntxiv cov gloss ntawm number case printing.
(4) Dispersing tus neeg saib xyuas: Lub dispersing tus neeg sawv cev yuav ua rau cov pigment hauv tus ntub dej ntub thiab ntub zoo heev hauv cov phom, kom cov pigment tau zoo dispersibility hauv tus cwj pwm, muab lub sij hawm sib txuam rau hauv tus tsim number, thiab txo cov roj absorption ntawm cov pigment. Tsim kom muaj cov xim concentration ntawm siab; tiv thaiv kev coagulation thiab nag lossis daus ntawm cov xim xim ntawm tus cwj mem. Tus neeg sawv cev ntawm tus neeg xa xov mas feem ntau yog ib tug surfactant.
(5) Yam Ntxim Saib Ntxim Ua: Cov khoom tseem ceeb ntawm kev siv quav yog hloov cov rheology ntawm tus cwj pwm, ua kom cov dej tsis haum thiab kev ua luam ntawv zoo (xws li kho kom haum), txo qhov tsis xws luag xws li smudging thiab rub daim ntawv, qhov saum npoo ntawm ziab zaj duab xis zaj duab xis. Cov kaus poom tshuab 2 ua rau kev txhav tsis zoo ntawm cov ntawv luam tawm thiab qhov zoo li. Nyob rau hauv UV number case, cov ciab tseem thaiv tsis tau pa, txo oxygen inhibition, thiab yog lig rau cov tawv curing. Txawm li cas los xij, ntxiv qhov ntau ntawm cov ciab quav thiab cov cwj pwm tsis zoo rau tus cwj pwm yuav txo qhov gloss ntawm tus cwj pwm, txov cov number case hloov, thiab ua kom ntev lub sij hawm ziab.