Kev sib raug zoo ntawm ntim cov txheej txheem luam ntawv thiab cov yeeb yaj duab zoo ntawm tus cwj mem
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.
Yog xav paub ntxiv, thov mus saib
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Nyob rau hauv lub ntim thiab luam ntawv, tom qab xim xim feem ntau luam tawm los ua kom pom lub siab zoo ntawm tus qauv kho kom zoo siab mus nrhiav tus nqi ntxiv ntawm qhov khoom.
Ua ntej, yuav kom ua tiav lub hom phiaj ntawm kaj thiab kaj zus tom qab, feem ntau, tus lej txheej hauv plag yog luam loj los yog muab luam tawm ib zaug los yog nce hauv luam ntawv, thiab cov roj av qhuav kuj ntxiv ntau ntxiv. Txawm hais tias tus cwj mem kua hauv npog tag nrho cov ntawv luam tawm, lub npoo ntawm cov ntawv luam tawm yuav ua ib tug cwj pwm du ploj heev vim muaj ntau qhov ziab. Nws tsis yooj yim rau overprint li zoo li lub khob, yog li ntawd tus number case luam tawm ntawm sab nraum qab yog tsis luam tawm los yog tag. Nce, tus cwj mem sau ntawm daim npog (pawg) nthuav tawm ib hom kab ntab zoo li los yog thaiv qhov xim ntawm cov xim hauv av, tus lej txuas tus neeg pluag, thiab qee zaum yuav raug so tawm. Kev lag luam luam nws hu nws tus cwj pwm zaj duab xis crystallization, vitrification lossis mirroring.
Txhawm rau txhim kho cov duab ntawm cov duab ntawm cov duab, hauv cov xyoo dhau los, cov tuam ntxhab feem ntau muab cov roj silicone rau ntawm tus number case, tab sis ntau cov roj silicone feem ntau ua rau ntsug shrinkage ntawm tus cwj pwm zaj duab xis.
Tam sim no, muaj ob peb lub tswv yim txawv ntawm qhov ua rau crystallization ntawm tus cwj pwm zaj duab xis. Raws li txoj kev xav ntawm crystallization, crystallization yog txheej txheem ntawm txoj kev ua kom pom los ntawm cov kua (kua los yog solvate) lossis lub xeev loj. Ib yam khoom uas nws solubility yog txo qis dua li qhov ntsuas kub qis dua. Cov tshuaj yog saturated thiab crystallized los ntawm kev txo qhov kub; cov khoom uas ua rau muaj feem me me hauv kev txheeb ze nrog txo qis hauv qhov kub txias yog txias thiab crystallized thaum ib feem ntawm qhov hnyav yog evaporated. Qee cov neeg xav hais tias cov duab ntawm pob ntawv luam tawm (hauv plhaub zaj duab xis txheej) yog recrystallization ... Cov ink film system yog evaporated (volatility) thiab ces txias, uas tseem hu ua recrystallization.
Qhov thib ob, qee cov neeg ntseeg tias crystallization (crystallization) ntawm lub hnab ntim ntawv luam tawm yog qhov tshwm sim los ntawm cov pob zeb hauv cov xuav kua xuav. Peb paub tias thaum siv cov xim ua pigment yog anisotropic, nws lub xeev crystal yog koob thiab pas nrig. Thaum tus cwj pwm zaj duab xis yog tsim, qhov kev coj mus ntev (longitudinal) yog yooj yim mus raws li cov lus qhia ntawm cov khoom siv (txuas cov khoom) hauv qhov system, kom muaj qhov qis loj kawg, thiab hauv qhov kev siv lead ua kheej kheej, tsis muaj kev tswj, thiab yog li lub shrinkage yog me me. Cov xim ntawm cov kabmob uas muaj hauv cov thawv ntim tshuab luam ntawv muaj feem xyuam ua paj ntoo, piv txwv li, ib lub hnab ntawv luam tawm ntawm cov xim siv cadmium, thiab nws cov shrinkage (crystallization) kuj tseem me me. Kuj, cov particle loj kuj muaj feem xyuam rau tus molding shrinkage piv thiab cov molding shrinkage piv. Piv txwv li, thaum cov xim pigment loj loj rau qee yam lossis me me mus rau qee yam, qhov sib qis ntawm qhov kev sib txuas thiab kev sib yeem sib nrawm yog tsawg. Ntawm qhov tod tes, cov duab uas muaj cov kwj crystal spherulitic crystal loj muaj ib lub me me, qhov uas siv lead ua loj, thiab cov kwj deg uas muaj aspherical muaj ib qhov loj ntsws. Hauv qab no, txawm nws yog qhov sib txuam sib xyaw xim ntawm cov xim pigments los yog cov quav tshuaj ntxiv ntawm cov xim xim, qhov siv cov pigments tsis yog tsuas yog siv rau cov qauv tshuaj, tab sis kuj yog nyob ntawm nws lub cev nqaij daim tawv, xws li siv lead ua cov me me thiab agglomeration. Cuam tshuam yam tseem ceeb xws li khoom sib tov; nws yuav tsum tau ua qhov kev ntsuam xyuas ncaj ncees ntawm qhov zoo thiab qhov tsis zoo ntawm cov pigments inorganic thiab cov organic pigments, yog li ntawd ob coexist, thaum yav tas los muaj txoj haujlwm thawj.
Hauv qhov txheej txheem xaiv lub hnab zauv luam ntawv (pigment), nws yuav tsum tau xav txog nws lub zog tinting (lub finer qhov dispersion, ntau zog lub tinting zog, tab sis nws muaj ib qho kev txwv, tshaj qhov uas lub zog tinting yuav txo), npog Force ( tus cwj pwm tsis zoo ntawm lub pigment nws tus kheej, qhov txawv ntawm refractive index ntawm lub thawv ntawv yuav tsum tau rau pigmentation thiab xim, qhov pigment particle loj, cov duab crystal ntawm lub pigment, symmetry ntawm molecular qauv siab dua lub opacity ntawm tus symmetrical tsawg Crystal form; Cov duab zoo li lub pas nrig-xws li zais lub hwj chim, thiab cov pigment uas muaj crystallinity muaj lub zog zais loj tshaj qhov crystallinity, yog li ntau dua qhov zais zis ntawm lub lag luam luam kabmob zaj duab xis, qhov ntau dua qhov ua tsis tiav ntawm vitrification), tshav kub tsis haum thiab migration tsis kam. Huab cua tsis kam, hnyav ua haujlwm, thiab ua haujlwm nrog polymers (resins ntawm number case systems) los yog additives ntxiv tsis tuaj yeem ua ntej.
Qhov thib peb, qee cov neeg lag luam ntseeg tias yog tias cov duab luam yeeb yaj kiab tau tsim muaj qhov tsis zoo, nws yuav ua rau lub lag luam tsis ua tiav. Vim tias qhov pib ntawm tus cwj pwm qis heev (qhuav), lub zog dawb tsis muaj zog. Tom qab tam sim no ib qho xim luam ntawv, lub sij hawm cia ntev heev, qhov kev cob qhia txias siab dhau lawm, los yog cov luam ntawv number case desiccant ntau, tshwj xeeb tshaj yog cov kab cobalt. Yog tias txoj hauv kev qhuav thiab khaus kom qhuav, xws li ziab, siv, crystallization tshwm sim.
Hauv txoj kev pom ntawm lub lag luam tsis ua tiav ntawm lub hnab ntim ntawv luam tawm tom qab zaj duab xis tag, tus neeg sau cov tswv yim nram no thiab cov kev tiv thaiv:
Ib qho yog siv lub plhaub zais kom khov sai nrog ntau hnyav (tsis txhob tos kom nws tuaj yeem sau cov xim thib ob, txawm tias cov nyhuv zoo dua, tab sis hom no yog khwv nyiaj, siv sij hawm thiab kim), thiab hnyav siv muaj peev xwm yuav raus. Thiab muag lub txheej ntawm cov zauv plaub hau (tab sis qee zaus nws tsis pab).
Qhov thib ob yog los tswj lub sij hawm dhau los, thiab ob lub xim yuav tsum muab luam tawm sai li sai tau tom qab dhau los xim luam ntawv.
Qhov thib peb yog ntxiv qee qhov qij qeeb (polymerization) (xws li hydroquinone) lossis cov khoom qeeb-qhuav (Vaseline, lanolin, wax ntxiv) rau tus number case.
Qhov plaub, sib txawv xim yooj yim uas yuav yooj yim rau overprint yuav siv tau los ua tus tsim ntawm lub ntim thiab luam ntawv kho kom zoo nkauj.
Thib tsib, cobalt hom kabmob yuav tsum tau siv tsawg dua hauv cov ntawv number case.
Rau, ib qho yooj yim ziab hluavtaws hom binder yuav siv tau los txo cov nqi ntawm cov kabmob hauv tus number case.
Lub xya yog los txhim khu lub adhesion ntawm tus thib ob xim cuav, lub hom phiaj ntawm qhov uas yog los tua cov kob ntawm cov kob ntawm kob duab. Yog tias lub voj vev los yog alkyd resin, epoxy resin thiab polyamide cob yog cov ntaub ntawv nrog ntau dua adhesion, qhov adhesion yuav enhanced los ntawm kev ntxiv tus number case, tab sis tus miscibility ntawm cov resins nrog tus number case offset tsis zoo. Vim tias qhov sib ntxiv ntau zaus yuav ua rau cov xim ntawm cov ntawv luam tawm xim, thiab cov nyhuv me ntsis yuav tsis zoo.
Yim yog ntxiv cov organic hnyav rau lub luam ntawv number case rau dissolve crystallized number case film. Qhov no yog ib qho ntawm feem ntau siv txoj kev ntawm tus neeg teb xov tooj luam, tiam sis tus cwj pwm ntim zaj duab xis txheej uas tau dhau los ua cov qauv mesh ntawm lub kob cag ntawm cov kob ntawm cov duab kob no tsis yog yooj yim yaj, thiab cov nyhuv tsis zoo thaum ntau dhau lawm.
Cuaj yog ntxiv rau alkali los sis tshuaj xub npum rau cov ntawv luam tawm los txhim khu lub cev, ua kom yooj yim luam tawm, tab sis thaum lub sij hawm nws zoo li raug luam tawm, tab sis tom qab ziab nws tsis ruaj khov thiab nws yooj yim heev so.
Saib ntawm cov kev kho mob saum toj no thiab kev tiv thaiv kev ntsuas, nws yog ib qho ua tau los xyuas kom meej tias qhov zoo tshaj ntawm cov luam tawm thiab cov ntawv luam tawm yog cov xim ntawm tus cwj mem qhuav rau hauv lub luam tawm, yog li ntawd nws yog qhov zoo tshaj plaws kom pib printing ob lub xim cia tus cwj mem los tsim ib zaj duab xis hla lub taub hau.