Taw qhia: Cov txheej txheem thermal hloov, ib qho txheej txheem hauv kev kho saum npoo ntawm cov khoom ntim khoom kom zoo nkauj, vim nws yooj yim luam tawm, thiab xim thiab qauv tuaj yeem hloov kho. Nws yog txheej txheem uas cov tswv lag luam nyiam. Cov hauv qab no yog kho los ntawmRB pob.Cia peb qhia qee qhov teeb meem zoo thiab cov kev daws teeb meem nrog rau qhov cuam tshuam ntawm thermal hloov, rau koj siv hauv cov saw hlau ntawm Youpin:
Kev hloov tshav kub
Thermal hloov txheej txheem yog hais txog cov ntaub ntawv hloov chaw coated nrog pigments los yog dyes raws li ib tug nruab nrab, los ntawm cua sov, pressurizing thiab lwm yam kev hloov cov qauv qauv ntawm tus number case txheej ntawm nruab nrab mus rau ib tug printing txoj kev. Lub hauv paus ntsiab lus ntawm thermal hloov yog ncaj qha mus cuag tus number case-coated nruab nrab nrog lub substrate. Los ntawm cov cua kub thiab kev kub siab ntawm lub thermal luam lub taub hau thiab lub tog raj kheej lub tswv yim, tus number case ntawm qhov nruab nrab yuav yaj thiab hloov mus rau lub substrate kom tau txais qhov xav tau ntawm cov ntawv luam tawm.
01Influencing yam ntawm thermal hloov
1) Thermal luam ntawv taub hau
Lub taub hau thermal luam ntawv feem ntau yog tsim los ntawm cov nplaum nplaum zaj duab xis tiv thaiv txheej, hauv qab nplaum zaj duab xis tiv thaiv txheej thiab cov khoom cua sov. Cov khoom siv cua sov yog cov tshuaj tiv thaiv kab mob. Nrog kev pab los ntawm lub tshav kub generated los ntawm lub voltage mem tes, cov coarse hais ntawm tus number case txheej ntawm daim duab yog embossed thiab melted kom tiav tus number case hloov.
Kev luam ntawv ceev ntawm thermal hloov yog nyob ntawm lub sijhawm xav tau rau txhua kab ntawm cov duab thiab cov ntawv. Yog li ntawd, cov thermal hloov lub taub hau thiab cov ntawv hloov pauv yuav tsum muaj cov cua sov zoo, kom cov cua sov tsim los ntawm cov cua sov tuaj yeem dhau los ntawm cov txheej txheem tiv thaiv, cov ntawv hloov pauv substrate thiab qhov sib txawv thiab thaum kawg mus rau saum npoo ntawm substrate kom paub meej. tias tus number case muaj sijhawm txaus hloov mus.
2) Ink
Qhov sib xyaw ntawm thermal hloov tus number case feem ntau yog peb ntu: pigment (pigment lossis dye), siv quav ciab thiab roj, uas yog cov khoom tseem ceeb ntawm thermal hloov number case. Lub hauv paus muaj pes tsawg leeg ntawm cov thermal hloov tus cwj mem tuaj yeem xa mus rau Table 1.
Table 2 yog ib qho piv txwv ntawm kev tshuaj ntsuam luam ntawv kub hloov tus number case formulation. N-methoxymethyl polyamide yog yaj nyob rau hauv benzyl cawv, toluene, ethanol thiab lwm yam kuab tshuaj, tshav kub-resistant pigments thiab bentonite yog ntxiv rau nplawm, thiab ces muab av rau hauv Screen printing inks. Tus number case yog luam tawm ntawm tus neeg nqa khoom (xws li thermal hloov ntawv) siv txoj kev luam ntawv, thiab tom qab ntawd cov ntaub yog thermally nias thiab xa mus.
Thaum luam ntawv, cov viscosity ntawm cov inks sib txawv yog ncaj qha ntsig txog cov cua kub kub, thiab cov cua kub kub thiab cov viscosity ntawm tus number case yuav tsum nruj me ntsis tswj. Kev xyaum tau ua pov thawj tias thaum lub cua sov kub yog 60 ~ 100 ℃, thaum tus number case melted, tus nqi viscosity ntawm tus number case yog ruaj khov ntawm li 0.6 Pa·s, uas yog qhov zoo tshaj plaws. Feem ntau hais lus, qhov ze ntawm tus number case yog rau lub xeev no, qhov kev hloov pauv tau zoo dua.
Nyob rau hauv xyoo tas los no, nrog rau kev txhim kho ntawm shanghai zaj duab xis pob tshuab, kev cia kub ntawm cov khoom luam tawm tau nce los ntawm thawj 45 ℃ mus rau 60 ℃, uas tau nthuav dav heev ntawm daim ntawv thov kev hloov pauv thermal. Tsis tas li ntawd, kev siv cov pob tshab pigments lossis pob tshab dyes muab cov xim zoo nkauj rau cov xim luam tawm.
3) Hloov xov xwm
Cov substrates sib txawv muaj cov khoom sib txawv, yog li thaum xaiv cov ntawv hloov pauv, koj yuav tsum tau them sai sai rau cov lus qhia hauv qab no ntawm cov substrate.
① Kev ua haujlwm ntawm lub cev
Cov khoom ntawm lub cev ntawm daim ntawv hloov pauv tau qhia hauv Table 3.
Cov saum toj no yog cov khoom ntawm lub cev ntawm peb lub thermal hloov daim ntawv substrates. Peb yam hauv qab no tuaj yeem txiav txim siab thaum xaiv:
Lub thickness ntawm lub substrate feem ntau yuav tsum tsis txhob ntau tshaj 20 μm;
Lub substrate yuav tsum muaj qib siab ntawm smoothness los xyuas kom meej qhov hloov ntawm tus number case;
Lub substrate yuav tsum muaj lub zog txaus los xyuas kom meej tias nws yuav tsis raug torn thaum hloov daim ntawv ua thiab luam ntawv.
② Chemical zog
Zoo thiab txawm tus number case adhesion yog ob qho tseem ceeb tshwm sim ntawm cov tshuaj lom neeg ntawm cov ntawv hloov pauv substrate. Hauv kev tsim khoom, cov khoom siv tshuaj ntawm cov ntawv hloov pauv ncaj qha cuam tshuam rau kev luam ntawv zoo. Yog tias daim ntawv hloov pauv tsis tuaj yeem ua rau tus number case zoo, lossis tus naj npawb ntawm tus number case tsis tau ua tiav hauv kev tsim khoom, nws yuav ua rau luam ntawv pov tseg. Cov txheej txheem luam ntawv zoo thiab cov ntawv luam tawm zoo yuav tsum yog raws li kev nkag siab zoo ntawm cov khoom siv tshuaj ntawm daim ntawv hloov chaw.
③ Kev ua haujlwm zoo thermal
Txij li cov txheej txheem hloov pauv tau pom tau los ntawm qhov kub siab txhais tau tias, cov khoom ntawm cov ntawv hloov pauv yuav tsum muaj peev xwm tiv taus qhov cuam tshuam ntawm kev hloov pauv kub thiab khaws cov khoom tsis hloov. Feem ntau hais lus, seb qhov kev ua tau zoo ntawm thermal ntawm substrate ntawm thermal hloov ntawv yog qhov zoo tuaj yeem cuam tshuam los ntawm cov hauv qab no:
Qhov qis dua cov cua sov ntawm cov hluav taws kub-resistant substrate, lub thinner lub thickness, qhov zoo dua lub tshav kub hloov, thiab qhov zoo dua nws thermal kev ua tau zoo;
Smoothness Lub smoother ntawm lub substrate nto, qhov qis dua cov cua sov kuj thiab qhov zoo dua thermal ua haujlwm;
Qhov kub ntawm lub tshav kub-resistant thermal print lub taub hau feem ntau yog nyob ib ncig ntawm 300 ℃, thiab lub substrate yuav tsum muaj peev xwm xyuas kom meej tias lub ntsiab kev ua tau zoo tsis hloov ntawm qhov kub thiab txias.
4) Substrate
Substrates nrog me ntsis ntxhib saum npoo muaj cov ntawv luam zoo dua, uas yog qhov tseem ceeb ntawm kev hloov thermal. Vim tias qhov ntxhib ntawm lub substrate qhia tau hais tias lub substrate muaj lub zog loj, tus cwj mem ntawm daim ntawv hloov pauv tuaj yeem hloov mus rau hauv lub substrate zoo, thiab cov qib zoo tagnrho tuaj yeem tau txais; tab sis ntxhib dhau lawm yuav cuam tshuam rau tus cwj mem zoo Ib txwm hloov pauv tsis zoo rau kev ua tiav ntawm cov txheej txheem luam ntawv.
02 ibFeem ntau ua tsis tau zoo
1) Ib tug qauv tshwm nyob rau hauv tag nrho version
Phenomenon: Cov pob thiab cov qauv tshwm sim ntawm nplooj ntawv tag nrho.
Yog vim li cas: number case viscosity tsawg dhau, squeegee lub kaum sab xis tsis zoo, number case ziab kub tsis txaus, hluav taws xob zoo li qub, thiab lwm yam.
Kev tshem tawm: nce lub viscosity, kho lub kaum sab xis ntawm lub scraper, nce qhov kub ntawm qhov cub, thiab pre-coat tus neeg sawv cev electrostatic nyob rau sab nraum qab ntawm zaj duab xis.
2) Napping
Phenomenon: Comet-zoo li kab tshwm sim ntawm ib sab ntawm tus qauv, feem ntau tshwm sim ntawm tus cwj mem dawb thiab ntawm ntug ntawm tus qauv.
Cov laj thawj tseem ceeb: cov xim xim xim xim yog loj, tus number case tsis huv, viscosity siab, hluav taws xob zoo li qub, thiab lwm yam.
Kev tshem tawm: lim cov number case thiab tshem tawm cov squeegee kom txo cov concentration; tus cwj mem dawb tuaj yeem ua ntej-sharpened rau electrostatically kho cov zaj duab xis, siv cov chopsticks sharpened los txhuam ntawm cov squeegee thiab phaj, los yog ntxiv ib tus neeg sawv cev electrostatic.
3) Cov xim tsis zoo sau npe, nthuav tawm hauv qab
Phenomenon: Pab pawg xim sib txawv tshwm sim thaum ob peb xim superimposed, tshwj xeeb tshaj yog nyob rau tom qab xim.
Cov laj thawj tseem ceeb: lub tshuab nws tus kheej muaj qhov tsis zoo thiab qhov hloov pauv; ua tsis zoo phaj; tsis tsim nyog nthuav thiab contraction ntawm cov xim tom qab.
Tsis suav: siv lub teeb strobe los sau npe manually; rov ua lub phaj; nthuav dav thiab cog lus nyob rau hauv kev cuam tshuam ntawm kev pom cov nyhuv ntawm tus qauv, los yog tsis muaj dawb-tawm hauv ib feem me me ntawm cov qauv.
4) Tus cwj mem tsis meej
Phenomenon: Ib daim npog ntsej muag tshwm rau ntawm cov ntawv luam tawm.
Yog vim li cas: Lub scraper tuav yog xoob; qhov layout tsis huv.
Kev tshem tawm: rov kho tus scraper thiab kho tus tuav riam; ntxuav lub phaj luam ntawv nrog cov hmoov decontamination yog tias tsim nyog; nruab rov qab cua muab nruab nrab ntawm lub phaj thiab lub scraper.
5) Cov xim luam ntawv poob tawm
Phenomenon: Xim tev tshwm sim nyob rau hauv ib cheeb tsam ntawm cov qauv loj, tshwj xeeb tshaj yog nyob rau hauv pretreatment zaj duab xis ntawm luam ntawv iav thiab stainless hlau.
Yog vim li cas: cov xim txheej nws tus kheej yog tev tawm thaum luam tawm ntawm cov txheej txheem ua tiav; hluav taws xob zoo li qub; cov xim number case txheej yog tuab thiab tsis txaus qhuav.
Kev tshem tawm: nce qhov kub ntawm qhov cub thiab txo qhov ceev.
6) Kev ceev ceev tsis zoo thaum hloov tsheb
Phenomenon: Cov xim txheej pauv ntawm lub substrate yog yooj yim rub tawm los ntawm daim kab xev siv rau kev sim.
Yog vim li cas: kev sib cais tsis tsim nyog lossis thim rov qab, feem ntau yog vim qhov kev thim rov qab tsis sib haum rau lub substrate.
Kev tshem tawm: Rov hloov cov nplaum nplaum (yog tias tsim nyog, hloov kho); hloov cov nplaum rov qab uas phim cov khoom siv hauv paus.
7) Anti-nplaum
Phenomenon: Cov number case txheej peels tawm thaum lub sij hawm rewinding, thiab lub suab nrov.
Yog vim li cas: ntau dhau winding nro, tsis tiav number case kom qhuav, tuab heev daim ntawv lo thaum lub sij hawm soj ntsuam, tsis zoo sab hauv tsev kub thiab av noo, hluav taws xob zoo li qub, ntau heev printing ceev, thiab lwm yam.
Kev tshem tawm: Txo qhov kev sib tw winding, los yog tsim nyog txo qhov nrawm ntawm kev luam ntawv kom ua kom qhuav kom tiav, tswj qhov kub thiab av noo hauv tsev, thiab ua ntej-coat tus neeg sawv cev electrostatic.
8) Poob point
Phenomenon: Irregularly ploj zoo dots (zoo ib yam li dots uas tsis tau luam tawm) tshwm nyob rau hauv lub web ntiav.
Yog vim li cas: tus number case tsis nce.
Kev tshem tawm: Ntxuav cov layout, siv lub tshuab nqus hluav taws xob electrostatic, ua kom cov dots tob, kho lub siab ntawm cov squeegee, thiab txo cov viscosity ntawm tus number case tsis cuam tshuam lwm yam kev mob.
9) Kub, nyiaj, thiab pearlescent tshwm txiv kab ntxwv zoo li ripples thaum luam ntawv
Phenomenon: Kub, nyiaj, thiab pearl feem ntau muaj txiv kab ntxwv tev zoo li ripples ntawm thaj chaw loj.
Yog vim li cas: Cov kub, nyiaj, thiab pearlescent hais yog qhov loj thiab tsis tuaj yeem sib npaug sib npaug hauv lub tais tais, ua rau qhov tsis sib xws.
Kev tshem tawm: Ua ntej luam ntawv, tus number case yuav tsum tau ua ntej, thiab tus number case yuav tsum tau muab tso rau hauv lub tais nrog lub twj tso kua mis, thiab lub tshuab tshuab yas yuav tsum muab tso rau ntawm tus number case tais; txo cov luam ntawv ceev.
10) Tsis zoo reproducibility ntawm qib luam ntawv
Phenomenon: Cov qauv nrog kev hloov pauv loj heev (xws li 15% - 100%) feem ntau tsis luam tawm hauv lub teeb mesh, tsis txaus nyob rau hauv lub suab tsaus nti, lossis pom tseeb junctions hauv nruab nrab lub suab.
Yog vim li cas: Qhov kev hloov pauv ntawm cov dots loj dhau lawm, thiab tus cwj mem adhesion rau zaj duab xis tsis zoo.
Kev tshem tawm: siv electrostatic suction roller; faib ua ob daim hlau.
11) Gloss ntawm cov ntawv luam tawm yog lub teeb
Phenomenon: Cov xim ntawm cov khoom luam tawm yog sib dua li cov qauv, tshwj xeeb tshaj yog thaum luam ntawv nyiaj.
Yog vim li cas: ink viscosity tsawg dhau.
Tsis suav nrog: ntxiv cov ntawv nyoos los ua kom tus number case viscosity kom tsim nyog.
12) Cov ntawv dawb muaj jagged npoo
Phenomenon: Jagged npoo feem ntau tshwm sim ntawm cov npoo ntawm cov ntawv uas xav tau siab dawb.
Yog vim li cas: cov khoom thiab cov xim ntawm tus number case tsis zoo txaus; viscosity ntawm tus number case yog tsawg, thiab lwm yam.
Tshem tawm: ntswj riam los yog ntxiv cov khoom ntxiv; kho lub kaum sab xis ntawm lub squeegee; nce viscosity ntawm tus number case; hloov lub electro-engraving phaj rau laser phaj.
13) Txheej tsis sib xws ntawm pre-txheej zaj duab xis ntawm stainless hlau (silicone txheej)
Lub pretreatment ntawm zaj duab xis (silicon txheej) feem ntau yog ua ua ntej luam ntawv stainless hlau hloov zaj duab xis, thiaj li hais tias qhov teeb meem ntawm tsis huv tev ntawm tus number case txheej thaum lub sij hawm hloov txheej txheem yuav daws tau (cov number case txheej yog nyob rau hauv cov zaj duab xis thaum kub. yog siab tshaj 145 ° C). Nyuaj hauv tev).
Cov saum toj no yog cov khoom ntawm lub cev ntawm peb lub thermal hloov daim ntawv substrates. Peb yam hauv qab no tuaj yeem txiav txim siab thaum xaiv:
Lub thickness ntawm lub substrate feem ntau yuav tsum tsis txhob ntau tshaj 20 μm;
Lub substrate yuav tsum muaj qib siab ntawm smoothness los xyuas kom meej qhov hloov ntawm tus number case;
Lub substrate yuav tsum muaj lub zog txaus los xyuas kom meej tias nws yuav tsis raug torn thaum hloov daim ntawv ua thiab luam ntawv.
② Chemical zog
Zoo thiab txawm tus number case adhesion yog ob qho tseem ceeb tshwm sim ntawm cov tshuaj lom neeg ntawm cov ntawv hloov pauv substrate. Hauv kev tsim khoom, cov khoom siv tshuaj ntawm cov ntawv hloov pauv ncaj qha cuam tshuam rau kev luam ntawv zoo. Yog tias daim ntawv hloov pauv tsis tuaj yeem ua rau tus number case zoo, lossis tus naj npawb ntawm tus number case tsis tau ua tiav hauv kev tsim khoom, nws yuav ua rau luam ntawv pov tseg. Cov txheej txheem luam ntawv zoo thiab cov ntawv luam tawm zoo yuav tsum yog raws li kev nkag siab zoo ntawm cov khoom siv tshuaj ntawm daim ntawv hloov chaw.
③ Kev ua haujlwm zoo thermal
Txij li cov txheej txheem hloov pauv tau pom tau los ntawm qhov kub siab txhais tau tias, cov khoom ntawm cov ntawv hloov pauv yuav tsum muaj peev xwm tiv taus qhov cuam tshuam ntawm kev hloov pauv kub thiab khaws cov khoom tsis hloov. Feem ntau hais lus, seb qhov kev ua tau zoo ntawm thermal ntawm substrate ntawm thermal hloov ntawv yog qhov zoo tuaj yeem cuam tshuam los ntawm cov hauv qab no:
Qhov qis dua cov cua sov ntawm cov hluav taws kub-resistant substrate, lub thinner lub thickness, qhov zoo dua lub tshav kub hloov, thiab qhov zoo dua nws thermal kev ua tau zoo;
Smoothness Lub smoother ntawm lub substrate nto, qhov qis dua cov cua sov kuj thiab qhov zoo dua thermal ua haujlwm;
Qhov kub ntawm lub tshav kub-resistant thermal print lub taub hau feem ntau yog nyob ib ncig ntawm 300 ℃, thiab lub substrate yuav tsum muaj peev xwm xyuas kom meej tias lub ntsiab kev ua tau zoo tsis hloov ntawm qhov kub thiab txias.
Phenomenon: Muaj kab txaij, filaments, thiab lwm yam ntawm zaj duab xis.
Yog vim li cas: Tsis txaus kub (tsis txaus decomposition ntawm silicon), tsis zoo feem ntawm cov kuab tshuaj.
Tsis suav: Ua kom qhov kub ntawm qhov cub kom qhov siab ruaj khov.
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Post lub sij hawm: Oct-25-2021