Yuav ua li cas kom tiv thaiv thiab daws cov teeb meem daj daj ntawm cov ntaub ntawv coated whiteboard?
Peb yog ib lub lag luam loj hauv Shenzhen Tuam Tshoj. Peb muaj cov phau ntawv luam tawm, phau ntawv nyuaj, 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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Cov neeg muaj ntau dua thiab ntau dua rau cov ntawv ntim ntawv, thiab cov ntawv nplaum dawb los ua cov khoom ntim khoom zoo, thiab nws qhov zoo tshaj plaws zoo li tau ua rau lub hom phiaj nrhiav neeg. Txawm li cas los xij, qhov teeb meem daj daj ntawm cov ntawv nplaum dawb ntawv tau cuam tshuam loj heev rau ntawm cov khoom ntim txheej sab nraud. Daim ntawv daj daj uas muaj ntaub ntawv dawb yog hais txog qhov uas lub ntsiab lus ntawm cov khoom yuav poob qis dua tom qab muab khaws cia rau ib lub sijhawm lossis tom qab raug tshav ntuj. Kev kawm txog qhov tshwm sim ntawm kev daj thiab cov txheej txheem ntawm daim ntawv tso xim dawb, thiab nrhiav kom paub ntau yam ntawm kev daj thiab cov kev ntsuas thiab kev kho kom ruaj ntseg zoo nkauj tau nyiam ntau thiab ntau dua. Daim ntawv no tsuas yog soj ntsuam qhov teeb meem ntawm yellowing ntawm coated whiteboard ntawv nrog rau kev xyaum ntawm peb lub tuam txhab, thiab sib tham txog yuav ua li cas tiv thaiv thiab daws qhov tshwm sim ntawm yellowing.
1. Kev tsim txoj kev teeb meem ntawm daj daj phenomenon ntawm cov ntaub ntawv coated whiteboard
Qhov tseeb kev tshawb nrhiav pom tias qhov tshwm sim daj tsos no yog tias cov ntawv xov xwm saum npoo reacts nrog cov pa cua hauv cov huab cua thaum lub sij hawm cia thiab tom qab lub hnub ci, uas hloov cov qauv ntawm txheej txheej thiab cuam tshuam rau tib neeg pom cov nyhuv. Lub degree ntawm oxidation txiav txim siab qhov mob hnyav ntawm yellowing. Cov txheej txheem oxidation yog vim yog kev nce qib ntawm peb yam: qhov kub siab, ultraviolet lub teeb, thiab pH.
2. Yam teeb meem uas cuam tshuam qhov tshwm sim ntawm yellowing ntawm coated whiteboard daim ntawv
Los ntawm kev txheeb xyuas ntawm txoj kev txhawb nqa hauv cov txheej txheem oxidation thiab cov ntaub ntawv ntawm cov ntaub ntawv coated whiteboard, qhov teeb meem uas cuam tshuam rau daj tshwm sim ntawm daim ntawv tsho dawb uas muaj xws li cov nram qab no: coated daim ntawv whiteboard, fluorescent whitening agent, coloring pigment, thiab txheej . Ntaub lo tawv, thiab lwm yam.
2.1 coated ntawv
2.1.1 Fiber hom thiab muaj pes tsawg leeg ntawm cov ntaub ntawv los ntawm lub hauv paus ntawv: yog qhov muaj pes tsawg leeg ntawm txheej txheej fibers. Lub hauv paus ntawv pulp coated nrog daim ntawv whiteboard feem ntau yog tsim los ntawm bleached tshuaj ntoo pulp, yog li ntawm yellowing ntawm lub hauv paus ntawv yog tsuas yog tshwm sim los ntawm tshav kub hla daj printing tshuab. Lub daj ntawm cov khoom cua tshuab yog vim los ntawm lub teeb-vim raug daj, yog li nws loj dua cov daj ntawm cov tshuaj pulp thaum lub sij hawm cia.
2.1.2 Cov ntaub ntawv pH ntaus nqi: Acid paperboard feem ntau yuav ua rau kom daj ntau tshaj li ntawv los ntawm cov ntawv tho plab alkaline.
2.1.3 Lwm cov ntaub ntawv raw ntawm lub hauv paus ntawv: Cov ntaub ntawv nyoos xws li cov khoom ntim khoom thiab kev tuav pov hwm kuj tseem muaj kev cuam tshuam me me.
2.2 Tus neeg muag tshuaj fluorescent
Cov tshuaj fluorescent whitening feem ntau yog ib qho kev ua los ntawm stilbene disulfonic acid (los yog tetrasulfonic acid), vim hais tias qhov lignin residue nyob hauv lub pulp los yog tej yam khoom pigment hauv cov txheej yuav ua rau lub daj daj ntawm daim ntawv qhia, thaum lub tshuab ntxuav hniav dawb Qhov siv yog los tua hub yellowish, uas yog txoj kev los txhim kho kom zoo ntawm lub Rooj Tswjhwm Saib. Txawm hais tias cov nyhuv ntawm lub ci ntsa iab yog luv luv, vim tias nws yog xim daj rau nws tus kheej, ib qho nyiaj ntau dua ntawm qhov kaj yuav tseem tuaj yeem cuam tshuam rau daj ntawm lub rooj tsavxwm.
2.3 xim xim xim
2.3.1 Muaj ntau hom xim muaj ntau zaus siv los ua xim pwm xim rau cov ntaub ntawv dawb, thiab lawv cov cai yuav tsum ua kom pom tseeb. Direct dyes thiab cov dyes yooj yim yog pheej yig, tab sis muaj lub teeb tsawg ceev.
2.3.2 Cov xim ntawm cov xim xim ntau dua, uas yuav ua rau kom cov ntaub ntawv daj dawb ntawm cov ntawv dawb.
2.4 txheej nplaum
Nws muaj peb hom kua nplaum uas siv los npog daim nplaum xim: acetate latex, styrene-acrylic latex, thiab styrene-butadiene latex. Ntawm lawv, acetic acid latex muaj tsawg tshaj plaws lub cawv ntawm lub daj, thiab styrene-butadiene latex muaj kev cuam tshuam loj tshaj plaws ntawm lub daj vim nws cov qauv khoob tshwj xeeb.
2.5 Kev sib piv ntawm cov khoom ntawm ntawv los ntawm cov ntawv xov xwm fiber ntau thiab nplaum rau ntawm yellowing ntawm coated dawb daim ntawv
3. Kev tiv thaiv thiab tov ntawm qhov tshwm sim ntawm yellowing ntawm coated whiteboard daim ntawv
3.1 Kev txhim kho ntawm cov ntaub ntawv uas muaj coated: Daim nplaum fib fais fab ntawm cov ntaub ntawv tseem ceeb tag nrho bleached tshuaj ntoo, thiab qhov nyiaj ntawm qhov phom plawv yog nce mus txhim kho cov kev pab ntawm cov neeg kho tshuab pulp ntawm lub qhov quav. Qhov nruab nrab alkaline sizing txheej txheem yog saws los txo cov nyiaj ntawm aluminium sulfate nyob rau hauv qhov chaw thiab nce tus nqi ntawm 13H ntawm lub hauv paus ntawv. Nws tau raug pov thawj los ntawm cov kev sim uas pH tus nqi ntawm cov ntawv txheej txheej zoo dua ntawm 6.5 thiab 8.0. Nyob rau hauv txoj kev tsim daim ntawv, qhov kub kom qhuav yuav tsum nruj nruj tswj kom paub meej tias qhov kub ntawm qhov ntawv txeem yog tsawg li tsawg tau, thiab daim ntawv txias ntawm cov ntaub ntawv thiab cov ntawv coated yog siv.
3.2 Siv cov dej zoo dua qub: Nws tau muaj pov thawj los ntawm cov kev sim uas daim ntawv thov cov xim ua kom muaj peev xwm txo tau cov xim daj ntawm cov khoom uas muaj ntaub ntawv. Thaum lub sij hawm tsim nyog rau tus kheej-degree ntawm cov khoom, nws muaj qis dua cov nyhuv ntawm lub daj ntau dua li cov tshuaj ntxuav hniav dawb. Dej ntws los ntawm cov dej khov zoo dua yuav tsum kom muaj kev siab zoo dua. Ib lub teeb ci nrog lub plawv purity tsis tsuas yog ua rau cov khoom tsis ruaj, tab sis kuj nyhav rau ib qho kev phenomenon yellowing. Tsis tas li ntawd, kev siv fluorescent whitening cov neeg ua hauj lwm nyob rau hauv txheej formulation, tab sis kuj daim ntawv thov ntawm lub ci ntim pa hluav taws xob (auxiliary nplaum).
3.3 Kev tsim nyog siv cov xim pigments: Kev siv cov xim pigments yog siv cov xim dawb (CIE), txo cov nyiaj fluorescent whitening agent, thiab sib npaug sib txawv cov ntaub ntawv tshuaj kom ua tiav lub Hawj Xub. Yuav kom txo tau qhov daj ntawm daim ntawv dawb, daim ntawv xaiv cov xim xim tsis tsuas yog yuav tsum tau yooj yim tuav, zoo affinity, tab sis kuj siab siab. Yog li, nws yog qhov zoo tshaj plaws los siv cov khoom zoo organic pigments, thiab nws cov kev ua tau zoo hauv txhua txoj kev zoo tagnrho. Ntau lub xim yuav tsum them rau cov xim ntawm cov xim, vim hais tias qhov nyiaj siab dhau heev lossis tsis tshua muaj peev xwm ncav tsis cuag lub hom phiaj ntawm cov xim. Ntau dhau yuav ua rau kom cov ntawv daj ntawm cov ntawv xiav dawb; Yog tias nws tsis dhau, qhov xaj siab dawb yuav tsis tiav.
3.4 Xaiv ib qho piv txwv ntawm txheej nplaum: Nyob rau hauv cov txheej txheem txheej, kom tiv thaiv thiab daws qhov teeb meem ntawm yellowing ntawm coated dawb daim ntawv, raws li qhov yuav tsum tau ntsuas cov nqi kho me nyuam thiab cov khoom ua tau zoo, siv ib leeg styrene-butadiene latex li txheej nplaum yog yuav luag tsis yooj yim. Vim li no, raws li qhov kev ua tiav ntawm cov khoom, nws tau xaiv qhov sib tov ntawm styrene-butadiene latex thiab lwm yam qoob loo, xws li pheej yig styrene-acrylic latex, uas tuaj yeem ua kom lub zog ntawm cov ntawv nplaum dawb thiab txo qhov yellowing degree tshuab luam ntawv.
3.5 Kev xaiv ntawm cov tshuaj tshiab tuaj: Nyob rau hauv kev tshawb fawb ntawm daim ntawv thov cov nano-silicon-based oxides hauv txheej txheej, cov nano-silicon-based oxides muaj cuab kav muaj peev xwm txo cov xim daj vim lawv txoj kev tsim molecular. Hauv kev ntsuam xyuas cov laus kev laus, qhov nqi ntawm qhov chromaticity b value decreases tsawg. Tsis tas li ntawd, UV absorbers thiab antioxidants kuj tuaj yeem txo cov tshuab luam ntawv yellowing ntawm cov ntaub ntawv dawb coatedings.
3.6 Lwm yam tseem ceeb uas yuav tsum tau muab sau tseg: piv txwv li, lub pH ntawm cov txheej, ntxuav ntawm cov txheej dej, siv cov hmoov txhuv nplej siab, cov dej noo ntawm coated paperboard, thiab lub ntim thiab cia ntawm cov ntaub ntawv coated. Txawm hais tias cov no tsis yog lub hauv paus tseem ceeb rau kev tsim daj, tsuav yog tias qhov kev tiv thaiv muaj zog hauv txhua txoj kev, nws tseem siv tau los daws qhov teeb meem ntawm daj dawb daim ntawv dawb.
4 Xaus
4.l Hauv kev xyaum tsim kho qhov teeb meem ntawm daim ntawv daj daj ntawm cov ntaub ntawv dawb, daim ntawv sau ntawv, tus neeg muag tshuaj fluorescent, cov xim xim thiab cov nplaum yog qhov tseem ceeb tshaj uas cuam tshuam rau daj. Txhim kho cov txheej txheem ntawm cov ntawv sau cov nplooj ntawv, xaiv cov neeg ua haujlwm zoo muag fluorescent, cov xim xim, kho cov tshuaj noj kom tsawg; scientifically txiav txim zoo ua ke ntawm cov nplaum, yuav ua rau kom tsis txhob muaj qhov tshwm sim daj dawb ntawm cov ntawv dawb.
4.2 Kev siv cov tshuaj tshiab cov tshuaj, xws li nano-silicon oxides, UV absorbers thiab antioxidants, kuj yuav txo qhov daj ntawm cov ntaub ntawv dawb.
4.3 Kev ntxiv dag zog rau kev tiv thaiv ntau yam ntawm kev tswj kev lag luam thiab kev ntim thiab cia cov ntaub ntawv ntawm cov ntawv nplaum dawb kuj yog ib txoj kev zoo los daws qhov teeb meem ntawm daim ntawv daj daj.