Hauv ntim luam ntawv, cov xim tom qab feem ntau yog luam tawm ua ntej los txhim kho qhov zoo ntawm cov qauv kho kom zoo nkauj thiab nrhiav cov nqi ntxiv ntawm cov khoom. Hauv kev ua haujlwm ua haujlwm, nws tau pom tias qhov kev luam ntawv no yog qhov ua rau number case crystallization. Qhov no yog vim li cas?
1 、 Yuav kom ua tiav qhov ci ntsa iab thiab ci ntsa iab, txheej number case feem ntau yog luam tawm tuab lossis rov luam dua ib zaug lossis nrog kev luam ntawv siab, thiab cov roj qhuav ntau ntxiv thaum luam ntawv. Txawm hais tias tus number case txheej npog tag nrho cov ntawv luam tawm, qhov ziab sai sai ua rau cov xim pleev xim zoo nkauj ntawm cov xim luam ntawv tom qab tsim cov yeeb yaj kiab, ua rau nws nyuaj rau overprint zoo, zoo li iav. Qhov no ua rau tus cwj mem luam tawm tsis sib xws lossis tsis tuaj yeem luam tawm. Cov roj number case luam tawm ntawm lub hau (pawg) nthuav tawm cov hlaws zoo li lossis cov xim tsis muaj zog ntawm cov xim luam ntawv ntawm lub hauv paus xim, thiab kev sib txuas ntawm tus number case tsis zoo, qee qhov tuaj yeem tshem tawm. Kev lag luam luam ntawv yog hais txog nws li ink film crystallization, vitrification, lossis mirrorization.
Txhawm rau txhim kho qhov pom tseeb ntawm cov duab thiab cov ntawv sau, feem ntau cov tuam ntxhab tau ntxiv cov roj silicone rau cov tshuab luam ntawv hauv xyoo tas los. Txawm li cas los xij, cov roj silicone ntau dhau feem ntau ua rau ntsug shrinkage ntawm tus number case zaj duab xis.
Tam sim no muaj ntau qhov kev xav sib txawv ntawm cov laj thawj rau crystallization ntawm number case films. Raws li kev tshawb xav crystallization, crystallization yog txheej txheem ntawm kev tsim cov muaju los ntawm cov kua (kua lossis yaj) lossis lub xeev roj. Ib yam khoom uas nws solubility txo qis nrog txo qhov kub thiab txias, thiab nws cov tshuaj tuaj yeem ncav cuag saturation thiab crystallize los ntawm kev txias; Ib yam khoom uas nws solubility txo qis me ntsis nrog txo qhov kub thiab txias, crystallizes thaum qee cov kuab tshuaj evaporate thiab tom qab ntawd txias. Qee cov neeg ntseeg tias crystallization ntawm cov ntawv ntim cov duab thiab cov ntawv (txheej zaj duab xis txheej) hu ua recrystallization... Lub tshuab luam ntawv number case zaj duab xis yog tsim los ntawm hnyav evaporation (evaporation) thiab tom qab ntawd txias, tseem hu ua recrystallization.
2 、 Qee cov neeg ntseeg tias crystallization (crystallization) ntawm cov ntawv ntim luam ntawv yog feem ntau tshwm sim los ntawm crystallization ntawm pigments nyob rau hauv lub number case system.
Peb paub tias thaum pigment crystals yog anisotropic, lawv lub xeev crystalline yog koob lossis pas nrig zoo li. Thaum tsim tus cwj mem zaj duab xis, qhov ntev kev taw qhia tau yooj yim raws li cov kev taw qhia ntws ntawm cov resin (txuas cov khoom siv) hauv qhov system, ua rau muaj qhov cuam tshuam loj; Txawm li cas los xij, tsis muaj kev taw qhia thaum lub sij hawm spherical crystallization, ua rau me me shrinkage. Inorganic pigments nyob rau hauv ntim printing number case systems feem ntau muaj spherical crystals, xws li cadmium raws li ntim printing number case, uas kuj muaj me me shrinkage (crystallization).
Qhov loj me me kuj cuam tshuam rau molding shrinkage tus nqi thiab molding shrinkage piv. Thaum cov pigment hais loj los yog me me rau ib qho twg, qhov molding shrinkage tus nqi thiab shrinkage ratio yog tsawg tshaj plaws. Ntawm qhov tod tes, resins nrog cov muaju loj thiab cov duab kheej kheej nthuav tawm me me molding shrinkage, thaum resins nrog cov muaju loj thiab cov duab uas tsis yog kheej kheej nthuav tawm loj molding shrinkage.
Nyob rau hauv luv luv, txawm hais tias nws yog lub subtractive mixing ntawm cov xim pigments los yog cov additive mixing ntawm lub teeb xim, kev siv cov xim tsis yog tsuas yog cuam tshuam nrog lawv cov qauv tshuaj, tab sis kuj tseem nyob ntawm lawv lub cev, xws li siv lead ua particle loj faib, condensation phenomena, kev daws teeb meem, thiab lwm yam cuam tshuam; Peb kuj yuav tsum tau ua qhov kev ntsuam xyuas ncaj ncees ntawm qhov zoo thiab qhov tsis zoo ntawm ob qho tib si inorganic thiab organic pigments, kom lawv sib koom ua ke, thiab tom kawg tuav txoj haujlwm tseem ceeb.
Thaum xaiv cov ntim luam ntawv number case (xim xim), nws tseem yuav tsum tau xav txog nws lub zog xim (qhov zoo dua qhov tawg, ntau dua lub zog xim, tab sis muaj qhov txwv tsis pub dhau qhov uas lub zog xim yuav txo qis) Npog lub zog (cov yam ntxwv absorbance. ntawm cov xim nws tus kheej, qhov sib txawv ntawm qhov ntsuas qhov ntsuas ntawm cov xim thiab cov resin binder xav tau rau xim, qhov loj ntawm cov xim xim, cov xim siv lead ua ntawm cov xim, thiab cov qauv molecular symmetry ntawm cov xim yog siab dua li cov symmetrical. low crystal form).
Lub zog npog ntawm daim ntawv crystalline yog ntau dua li ntawm tus pas nrig, thiab lub zog npog ntawm cov xim nrog cov crystallinity siab yog ntau dua li cov xim uas tsis muaj crystallinity. Yog li ntawd, qhov ntau dua lub hwj chim ntawm lub ntim tshuab luam ntawv number case ink zaj duab xis, qhov ntau yuav muaj iav tsis ua hauj lwm. Kev tiv thaiv tshav kub, kev tsiv teb tsaws chaw, huab cua tsis kam, solubility tsis kam, thiab kev cuam tshuam nrog polymers (resins hauv roj number case systems) lossis cov khoom siv ntxiv tsis tuaj yeem kwv yees.
3 、 Qee tus neeg ua haujlwm ntseeg tias kev xaiv tsis raug kuj tuaj yeem ua rau crystallization tsis ua haujlwm. Nws yog vim hais tias lub hauv paus number case dries nyuaj heev (tag nrho), uas ua rau ib tug txo nyob rau hauv deg dawb zog. Tam sim no, yog tias lub sijhawm khaws cia tom qab ib lub xim luam ntawv ntev dhau lawm, qhov chaw ua haujlwm kub siab dhau lawm, lossis muaj ntau ntau cov luam ntawv number case desiccants, tshwj xeeb tshaj yog cobalt desiccants, yog ceev ceev thiab khaus qhuav txoj kev, xws li ziab, siv, crystallization tshwm sim. yuav tshwm sim.
Post lub sij hawm: Nov-22-2023
