Hose yog ib feem tseem ceeb ntawm kev ntim tshuaj txhua hnub, dav siv nyob rau hauv cov khoom lag luam xws li tes cream, tshuaj ntxuav tes, tshuaj pleev thaiv hnub thiab lwm yam.Tsoos hose nto txheej txheej yog cov kuab tshuaj raws li ob lub ntsiab lus polyurethane txheej.Txawm hais tias ob lub ntsiab lus polyurethane coatings muaj kev ua tau zoo nyob rau hauv cov nqe lus ntawm txheej yooj yim thiab theem nrab luam ntawv (bronzing), lawv cov kev ua tau zoo yog siab li 80%.Cov ntsiab lus VOCs saum toj no ua rau nws txwv tsis pub siv, tshwj xeeb tshaj yog nyob rau xyoo tas los no, nrog rau kev ntxiv dag zog ntawm kev tiv thaiv ib puag ncig kev paub txog lub teb chaws thiab cov pej xeem hauv peb lub teb chaws, kev tsim thiab siv cov txheej txheem VOCs siab yog raug saib xyuas nruj.Nws tau mus txog qhov kev pom zoo tias ib puag ncig tus phooj ywg hose txheej chloov cov txheej txheem siab VOCs cov ntsiab lus.
Tam sim no, cov ntaub ntawv pov thawj zoo ib puag ncig muaj xws li: 1. Cov txheej txheem dej uas muaj VOCs cov ntsiab lus tsawg dua 10%;2. Cov coatings siab lossis txawm tias tag nrho cov txheej txheem uas muaj cov ntsiab lus siab tshaj 85%.Txij li tam sim no hose round cov ntaub ntawv tsuas yog polyethylene, cov yam ntxwv ntawm cov khoom siv dej tsis muaj kev ua haujlwm tsis muaj txiv plig ua ntej hauv kev siv hose txheej.High-kub UV-kho coatings (UV-curable coatings) tau dhau los ua thawj qhov kev xaiv rau ib puag ncig tus phooj ywg txheej rau hoses nyob rau theem no vim lawv cov kev ua haujlwm siab, txuag hluav taws xob, thiab kev tiv thaiv ib puag ncig.Txawm li cas los xij, vim yog cov yam ntxwv ntawm UV-kho tau cov txheej txheem, thaum tib neeg siv cov txheej txheem UV-kho tau rau kev tsim cov khoom siv tshuaj niaj hnub hose ntim khoom, lawv feem ntau yuav ntsib teeb meem xws li lub teeb tsis zoo ntawm cov txheej txheej, yooj yim yellowing, tawg ntawm lub teeb. txheej, matte Tsis zoo hnav tsis kam, nyuaj luam ntawv theem nrab (bronzing), tsis hnov tsw zoo tom qab pleev xim, thiab lwm yam.
Kab lus no yuav pib los ntawm cov hauv paus ntsiab lus ntawm UV curing coatings, ua ke nrog cov ntawv thov tiag tiag, thiab sib tham txog cov teeb meem tseem ceeb uas tau hais los saum toj no hauv cov txheej txheem txheej txheej thiab theem nrab kho kom zoo nkauj ntawm hose ntim cov ntaub ntawv siv hauv cov tshuaj niaj hnub.Nyob rau hauv lub hauv paus ntawm optimizing lub txheej txheej, raws li qhov tseeb qhov teeb meem ntawm lub ntim khoom chaw tsim tshuaj paus muab kev daws teeb meem rau cov teeb meem no.
Taw qhia rau UV Curing Txheej
Photocuring yog ib qho kev txhim kho sai "ntsuab" thev naus laus zis tshiab.Txij li xyoo 1970s, photocuring thev naus laus zis tau siv dav hauv txheej txheej, inks, crosslinking agents thiab chaw kho mob.Ntawm lawv, ultraviolet lub teeb curing (UV curing) tshuab yog tam sim no feem ntau siv lub teeb kho tshuab.UV txheej yog tsim los ntawm photoinitiators, unsaturated resins thiab monomers, deg tswj additives thiab tsim nyog pigments thiab fillers.Hauv kev kho kom zoo nkauj saum npoo ntawm cov khoom ntim tshuaj niaj hnub, UV kho tshuab tau dav siv hauv kev txau, luam ntawv thiab lwm yam.Nyob rau hauv cov txheej txheem niaj hnub tshuaj hose ntim cov ntaub ntawv, UV-kho coatings yog tus cwj pwm los ntawm ceev curing, siab nto gloss, zoo heev khawb kuj, thiab cov ntsiab lus siab.Raws li ib tug tshwm sim ib puag ncig-phooj ywg txheej khoom, nyob rau hauv xyoo tas los no ntau thiab ntau tus neeg xav.
Txawm li cas los xij, zoo li lwm yam khoom siv, UV-kho coatings kuj muaj teeb meem xws li yellowing, tawg, thiab hnav tsis zoo thaum siv.Kab lus no yuav tsom rau kev sib tham txog ntau yam teeb meem ntawm UV txheej siv rau hoses., pib los ntawm qhov ua rau ntawm cov teeb meem, muab tso rau pem hauv ntej txoj kev los daws cov teeb meem no los ntawm cov txheej txheem txheej txheem rau txheej txheej txheej txheej txheej.
Cov teeb meem tseem ceeb thiab kev daws teeb meem thaum UV curing txheej yog siv rau cov khoom ntim tshuaj txhua hnub
Ib.Ua rau thiab kev daws teeb meem ntawm yellowing
Lub ntsiab yog vim li cas rau yellowing ntawm UV-kho coatings yog hais tias lub txheej muaj cov qauv molecular uas yuav nqus tau ultraviolet lub teeb ntawm ib tug tej wavelength.Tom qab absorbing ultraviolet lub teeb ntawm ib lub wavelength tshwj xeeb, cov tshuaj no tsim lub zog hloov pauv thiab nws thiaj li ua rau oxidation ntawm txheej.Thaum lub degree ntawm oxidation tsis siab, nws yuav tig daj nyob rau hauv tsos, feem ntau hu ua "daj".
(Sab laug daim duab – yellowing phenomenon, right picture – normal)
Cov khoom tseem ceeb hauv UV txheej uas tuaj yeem nqus tau ultraviolet lub teeb yog:
1. Photoinitiator residue (qhov no yog cov khoom tseem ceeb tshaj plaws uas ua rau yellowing)
2. Cov qauv molecular uas muaj UV ua haujlwm (qhov no ntawm UV txheej yog feem ntau yog cov khoom uas muaj benzene nplhaib qauv hauv UV resin lossis monomer)
3. Residual uncured unsaturated bonds, thiab lwm yam yooj yim oxidizable tshuaj (xws li cov amino pawg, thiab lwm yam)
二 、 Ua rau thiab kev daws teeb meem ntawm txheej tawg
Cov laj thawj tseem ceeb ntawm kev khoov thiab tawg ntawm cov txheej txheem: 1. Lub adhesion ntawm cov txheej rau lub substrate tsis zoo;2. Lub elongation ntawm tawg ntawm txheej yog tsawg tom qab kho.Cov lus nrov yog hais tias lub toughness ntawm txheej yog tsis zoo.
Kev daws rau txheej txheej cracking:
1. Pib los ntawm cov qauv tsim, muab cov txheej txheem nrog adhesion zoo dua thiab toughness;
2. Los ntawm kev tswj cov txheej txheem txheej txheej, cov txheej txheem tshwj xeeb yog: 1. Pretreatment ntawm lub substrate, xws li nplaim taws, corona thiab lwm yam kev kho mob ntawm lub substrate los yog pre-treatment ntawm pre-coating tus neeg saib xyuas, kom cov polarity saum npoo. ntawm lub substrate thiab txhim kho qhov zoo ntawm substrate.2. Thaum lub sij hawm txheej txheej txheej, txheej txheej thickness yuav tsum tau txo kom tsim nyog, thiab qhov kub thiab UV curing zog yuav tsum tau nce.
三 、 Ua rau thiab cov kev daws teeb meem ntawm tsis muaj ntxhiab tsw
Lub coated hose yuav hnov tsw tsw ntxhiab thaum cov khoom muab tso rau, tshwj xeeb tshaj yog tias cov khoom raug kaw hauv lub hnab ntim tau ntev, thaum lub hnab ntim tau qhib.Lub ntsiab yog vim li cas rau cov pungent tsw yog hais tias tsawg-boiling me me molecular tebchaw nyob rau hauv cov xim zaj duab xis tsiv mus nyob rau saum npoo ntawm txheej thaum lub sij hawm, volatilize rau hauv huab cua, thiab sib sau ua ke tsis tu ncua nyob rau hauv ib tug kaw ib puag ncig.Cov peev txheej ntawm cov dej me me molecular no feem ntau yog cov kuab tshuaj residual (cov kuab tshuaj uas tsis ua kom tsis muaj zog), cov seem me me molecular monomers (tsis tiav curing), thiab cov khoom me me molecular uas tsim los ntawm photoinitiators thiab lawv tawg (feem ntau hu ua cov residues pib).).
Txoj hauv kev los daws qhov tsis hnov tsw tom qab kho:
1. Pib los ntawm kev tsim qauv, siv cov txheej txheem pib ua haujlwm kom txo tau tus nqi pib siv;nce cov ntsiab lus ntawm multifunctional Cheebtsam nyob rau hauv lub system, thiab siv tsim nyog plasticizing Cheebtsam kom txo tau cov me me molecule monomers, tshwj xeeb tshaj yog monofunctional me me molecules.Kev siv Monomer.
2. Los ntawm qhov kev xav ntawm txheej txheej txheej txheem tswj, tsim nyog txo cov txheej txheej thickness, ua kom qhov kub thiab txias, thiab UV curing zog tuaj yeem txo qhov tsim ntawm cov ntxhiab tsw phem.
四.Yog vim li cas thiab kev daws teeb meem rau qhov tsis zoo khawb tsis kam ntawm matte hose
Yog vim li cas rau qhov tsis zoo khawb tsis kam ntawm matte txheej yog tias cov nyhuv matte ntawm cov txheej txheem yog tsim los ntawm diffuse reflection ntawm txheej txheej ntawm lub teeb, thiab diffuse reflection ntawm txheej txheej yog feem ntau tshwm sim los ntawm roughness ntawm cov txheej txheem. txheej txheej thiab txheej txheej.Incompatibility ntawm txheej nws tus kheej tshwm sim.Thaum lub ntsej muag ntxhib yog rubbed, nws yuav ua rau muaj kev sib txhuam ntau dua, ua rau cov txheej txheej yuav ua rau khawb ntau dua li qhov siab-gloss nto.Tsis tas li ntawd, cov hmoov tshuaj nyob rau hauv matte txheej yuav rhuav tshem qhov kev ncaj ncees ntawm txheej txheej rau qee qhov, uas yog ib qho ntawm cov laj thawj vim li cas cov matte txheej yuav raug khawb ntau dua li cov txheej glossy.
(Lub raj matte yog ib qho yooj yim rau khawb thiab tig dawb thaum rubbed)
Solutions rau khawb:
1. Pib los ntawm kev tsim qauv, siv ib feem ntawm cov matte resin los hloov cov hmoov sib xyaw hauv cov xim tuaj yeem txo qhov roughness ntawm txheej txheej thiab ua rau kom cov xim-puag piv ntawm cov txheej hauv qab qhov chaw ntawm kev ua kom cov matte degree ntawm cov xim. txheej, thiab thaum kawg ua tiav Txhim kho khawb tsis kam ntawm matt coated nto.
2. Pib los ntawm kev tswj cov txheej txheem txheej txheej, tsim nyog txo cov txheej txheej txheej, ua kom qhov kub thiab txias, thiab UV kho lub zog tuaj yeem txhim kho qhov khawb tsis kam ntawm matte txheej.
五.Yog vim li cas thiab kev daws teeb meem rau kev ua haujlwm tsis zoo kub stamping
Cov laj thawj tseem ceeb ntawm kev ua haujlwm kub stamping tsis zoo yog: 1. Cov txheej txheem tsis sib xws nrog cov ntawv kub stamping, ua rau tsis tiav kub stamping lossis adhesion tsis zoo;Qhov thib ob, cov txheej txheem tswj thaum lub sij hawm kub stamping tsis ruaj khov.
Kev daws rau cov tsis zoo kub stamping:
1. Los ntawm kev xav ntawm formulation, Weixi Chemical creatively qhia cov khoom nrog kub-sensitive zog rau hauv formulation.Cov khoom zoo li no muaj qhov nyuaj siab thiab tsis tshua muaj qhov nro ntawm chav tsev kub, tab sis thaum qhov kub thiab txias nce mus txog lossis siab dua nws cov theem hloov pauv, cov khoom siv no nkag mus rau theem kev hloov pauv nrog kev txo qis hauv hardness nrog kev nce hauv qhov nro.Thaum lub sij hawm kub stamping txheej txheem, txij li qhov kub ntawm qhov kub stamping qhov kub nce siab tshaj qhov hloov pauv kub ntawm cov khoom, qhov hardness ntawm kub stamping qhov yog txo qis heev thiab qhov nro saum npoo yog nce, yog li txhim kho qhov adhesion ntawm kub stamping. daim ntawv thiab txheej thiab kev ncaj ncees ntawm cov kub stamping.Thaum cov txheej txheem bronzing tiav, qhov kub thiab txias poob qis dua theem hloov pauv kub thiab lub hardness ntawm txheej rov qab.
2. Los ntawm qhov kev xav ntawm kev tswj cov txheej txheem, muab qhov tseem ceeb rau kev xaiv cov ntawv bronzing thiab cov txheej txheem uas phim cov txheej txheem, thiab tsim nyog ua kom cov bronzing kub thiab nias lub zog thaum lub sij hawm bronzing, uas yog qhov zoo rau kev txhim kho kev ncaj ncees thiab adhesion ntawm bronzing.
UV-hom PE hose kua roj vanish yuav maj mam hloov ob-tiv thaiv polyurethane txheej.Nws yog lub teb chaws kev nyab xeeb kev tsim khoom, kev tsim khoom huv si, txo cov pa roj carbon monoxide, thiab kev tiv thaiv ib puag ncig.Qee qhov teeb meem uas tshwm sim thaum lub sij hawm tsim kho ntawm UV kua roj vanish tuaj yeem daws tau los ntawm cov kua roj vanish.Cov qauv kev hloov kho ntawm cov chaw tsim khoom, cov txheej txheem hloov kho ntawm cov chaw tsim khoom thiab lub Hoobkas hose yog sib koom ua ke.
Shanghai Rainbow Industrial Co., Ltdmuab ib qho kev daws teeb meem rau kev ntim khoom kom zoo nkauj.Yog tias koj nyiam peb cov khoom, koj tuaj yeem tiv tauj peb,
Lub Vev Xaib:www.rainbow-pkg.com
Email: Bobby@rainbow-pkg.com
WhatsApp: + 008615921375189
光固化是一种快速发展的“绿色”新技术，从20世纪70年代至今，光固化技术已广泛庖幔五医疗等领域。其中紫外光固化 (UV 固化) 技术是目前应用最为广泛的光固化技术。UV 涂料主要由光引发剂、不饱和树脂及的单体，表面控制助体，表面控制助。在日化包装材料表面装饰领域，UV 固化技术被广泛应用于喷涂， 印刷等领域。在日化软管包装材料涂装中，UV 固化涂料以其快速固化、表面刀泽固含量高的特点，做为一种新兴的环境友好型涂装材料，近年来越来越引起人们的关注.
然而，同其他任何材料一样，UV固化涂料在使用过程中也会存在诸如黄变、开裂、倭壮文将重点就应用于软管的UV 涂料常见的各种问题进行讨论，从问题产生的原因出发，提出从涂料配方设计到涂料施工过程的解决这些问颢。
Post lub sij hawm: Jan-06-2023