Tshawb xyuas qhov ua rau tuaj o thiab cov gelation hauv ink printing thiab yuav tshem tawm licas
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.
Yog xav paub ntxiv, thov tuaj xyuas
http://www.joyful-printing.com. HMOOV nkaus xwb
http://www.joyful-printing.net
http://www.joyful-printing.org
email: info@joyful-printing.net
Feem ntau, hauv cov ntawv luam tawm txheej txheem, peb qee zaum muaj feem xyuam xim los yog lub teeb xim hauv kev luam. Qhov tshwm sim no yog hu ua qhov tsis ua hauj lwm ntawm tus lej thiab tus number case rau hauv kev lag luam. Qhov ua rau tsis ua hauj lwm no yog vim muaj tus cwj mem. Kev luam tawm, lub kaw lus ntawm tus number case system thiab qhov o ntawm cov muab tub lim tau ua rau zuag qhia tag nrho ntawm cov cwj mem.
Los ntawm ib qho kev qhia theoretical: yield value ntawm tus number case yog siab heev, tus number case yog luv heev los yog zoo li cheese. Los ntawm cov tswv yim uas pom: ntau cov pigments thiab fillers nyob rau hauv cov number case tuaj yeem nkag tus cwj mem los yog nkag mus rau hauv lub tshuab xev xauv thaum lub sij hawm cia ua rau ib nrab flocculation.
Tau ntev ntev, tib neeg tau muab cov cwj mem xiav tso rau hauv tus cwj mem xiav rau txoj kev loj hlob los yog cov gelation, los yog txhim kho tus cwj pwm hauv tus ciav cwj mem, thiab muab tus pas hlau dai rau ntawm tus cwj mem ntawm lub ciav tus cwj mem los thev tus cwj mem Number case ciav tus kheej los tuav tus number case luam tawm. fluidity. Feem ntau cov neeg tsav tsheb xav siv cov vev xaib los yog thev voos los kho tus cwj mem (tab sis qhov no yuav tsum tau muab siv li niaj zaus, txwv tsis pub nws yuav swell los yog gel). Qee cov ntawv luam tawm tau muab tus number case los tua thiab hloov tus number case nrog cov dej fluidity thiab dej ua ntej luam ntawv. Thoob plaws hauv cov teeb meem saum toj no, tus kws sau ntawv tshawb fawb thiab tshuaj xyuas qhov teeb meem no thiab qhia txog kev tshem tawm qhov kev poob haujlwm.
Cov kev sib raug zoo ntawm tus number case gelation thiab acid-base
Qhov teeb meem ntawm cov kua roj ntoos hauv chiv muaj feem ntau ntsib hauv cov roj thaum ntxov (oxidative drying thiab permeation drying inks), thiab qee zaus hauv qhov hnyav (ua kom nrov qhuav) thiab aqueous inks. Nws yuav tsum raug paub tias qhov ua rau tuaj tom qab yog ib qho nyuaj (nrog rau tus txheej txheem ntawm kev tsim khoom, xws li thawj zaug thiab qhov sib ntxiv ntawm qhov dej). Nrog rau kev paub txog science, kev siv cov ntaub ntawv tshiab tau pab peb ntxiv dag zog rau txoj kev tshawb fawb txog kev tshawb fawb thiab kev tswj ntawm qhov muaj feem xyuam xim ntawm cov khoom xyaw. Thaum twg tus lej ntawm tus cwj pwm hloov hnub no, txhua yam kev puas hlwb yuav tshwm sim txhua lub sij hawm, tab sis yuav raug tswj. Yog vim li cas thiaj tau gelation, kev lag luam ntseeg hais tias muaj rau:
1. Lub cev ntawm tus number case muaj qhov hnyav loj heev (lub viscosity yog siab);
2. Muaj ntau ntau yam khoom (txawm tias cov ntaub tiag khi nrog cov viscosity tsawg);
3. Cov kua qaub ntawm cov kua number case dhau heev lawm;
4. Pigments thiab fillers yog alkaline;
5. Cov ntsiab lus tsis txaus ntseeg yog ntau dhau los lossis qhov kev txiav txim ntxiv ntawm kev sib ntxiv yog qhov tsis zoo (xws li ob qho kev tshwm sim ua ntej thiab tom qab tus lej ntawm);
6. Qhov hnyav ntawm tus cwj pwm kua xaj yog qhov hnyav hnyuv yooj yim;
Nws tuaj yeem pom ntawm qhov saum toj no rau lub hauv paus: thawj ob yog nyob rau thaj tsam ntawm physics, thiab yooj yim zam thiab yooj yim txiav txim los ntawm ib qho kev ua lag luam txog kev ua lag luam los yog cov neeg lag luam luam ntawv. Cov tom kawg plaub yog vim muaj ib yam tshuaj lom neeg (tshuaj tiv thaiv). Peb tseem yuav pom thaum tawm tshawb nrhiav plaub yam tom kawg; qhov kub ntawm cov dispersion txheej txheem yog siab dhau, lub volatilization ntawm qhov hnyav, thiab cov ntaub ntawv kev tsis zoo ntawm lub koom haum additive kuj yuav ua rau lub tendency ntawm acidification ntawm tus number case. Piv txwv li, lub pob zeb uas muaj rosin muaj ib qhov hnyav ntawm 330 tsuas yog ua rau tuaj tom qab, teeb meem, thiab teeb meem hauv inking thaum luam ntawv hnyav ua kom yooj yim-ceev zauv uas yog siv lub plhaub tiab loj-pigment. Tsis tas li ntawd, mloog yuav tsum tau them rau qhov zoo thiab qhov tsis zoo ntawm acidic pigmented carbon pigments thiab rosin acid qhov tseem ceeb. Qhov no yog txaus qhia tias acid [acid yog electrophilic, electron acceptor (proton donor)] base yog nucleophilic, electron donor (proton lees), thiab thiaj li hu ua amphoteric solvent reintegration (ob leeg proton pub dawb) Lub cev, muaj proton lees dej , haus dej cawv, carboxylic acid thiab nitrocellulose, thiab lwm yam, tom qab ib qho hnyav hydrocarbon solvent uas tsis tsim hydrogen, bonds, nruab nrab pigments thiab amphoteric pigments, etc. Qhov kev sib raug zoo tau ntev lawm. Qhov no yog hais tias, thaum cov kua qaub ntawm cov kua qaub ntawm cov pigments tsis sib xws ntawm cov kua qaub-lub hauv paus ntawm cov phom, peb tuaj yeem tsim los yog txhim kho los ntawm kev siv ntau hom kab txawv kom haum cov xim thiab cov kua qaub ntawm cov kua qaub tus neeg txheeb xyuas kom sib npaug los yog xaiv ib qho uas tsim nyog. Qhov no yog ib qho kev kho mob li niaj zaus.
Thaum peb tshawb hauv cov tshuaj lom (tshuaj tiv thaiv), peb pom tias thaum lub stoichiometric concentration loj txaus rau ib qho nqi (hais lus nruj me ntsis, muaj ntau yam qis heev), cov khoom lag luam yuav maj mam hloov. Los ntawm qhov kev tshawb xyuas me me, lub cev muaj zog ntawm cov cwj mem kua hauv lub sij hawm no pib koom nrog, ua cov aggregates sib txawv ntawm qhov ntau thiab tsawg ntawm cov khoom siv colloidal. Cov aggregate no hu ua micelle lossis micelle, uas kuj hu ua koom haum sib sau ua ke. Ib qho tseem ceeb ntawm micelles yog qhov tshwm sim ntawm solubilization, uas zoo heev ua rau lub cev tsis haum xeeb los sis cov tshuaj yeeb dej caw me ntsis - feem ntau hu ua o, uas tsom qhov kev txiav txim ntawm kev tshuaj lom neeg, thiab lub tswv yim ntawm nws cov tshuaj tiv thaiv yog qhov yuav tshwm sim Cov kab mos, tshwj xeeb tshaj yog qhov txheej txheem kev faib cov txheej txheem pigment, yog zoo ib yam.
Txoj kev tshem tawm o tuaj thiab tuaj
Ntxiv rau cov ncauj lus hais saum toj no, lub drier hauv tus number case kuj tseem tuaj yeem cuam tshuam rau qhov ua kom siab, nce ntxiv ntawm tus cwj mem thaum lub sij hawm cia thiab lub sig rau ntawm cov pigment thiab muab tub lim. Piv txwv li, lub siab ceev xaj alkyd thiab alkaline pigment zinc oxide yog cov av ua ke nyob rau hauv lub xub ntiag ntawm lub pob txha kom txhawb kev tuaj thiab swelling thaum lub sij hawm cia. Qhov no yog vim cov tshuaj tiv thaiv ntawm cov dawb fatty acids thiab cov pigments thaum lub sijhawm ua thermal. Yog li, thaum uas ua cov roj hauv siab uas muaj cov ntaub ntawv tseem ceeb, cov hlau lead, kev siv, manganese, thiab drier yuav tsum tsis ntxiv thaum lub sijhawm sib txuam. Txawm li cas los xij, txoj kev ntshaw tuaj yeem txo tau tom qab sib ntxiv ntawm 1% benzoic acid. Lwm disadvantage ntawm drier yog hais tias nws accelerates lub settling ntawm pigment thaum lub sij hawm cia. Piv txwv, thaum tus number case yog ua los ntawm titanium dioxide, zinc naphthenate ntxiv thaum lub sib tsoo, thiab cov xim yoojyim yog yooj yim tswm los ua ib qho nyuaj thaiv. Yog li, ntxiv ib drier ua ntej cov pigment sib tsoo yuav ua rau cov neeg pluag cia ntawm tus number case, yooj yim o, gelation thiab agglomeration.
Nyob rau hauv xyoo tas los no, tib neeg tau npaj ntau yam kev kho nyob rau hauv no txoj kev thiab ib ncig ntawm lub o, gelation thiab los nag ntawm number case. Txawm li cas los xij, txoj kev daws teeb meem feem ntau nyiam cov neeg saib xyuas tom qab tsis ua hauj lwm. Qhov no yog ib txoj kev ua haujlwm uas ua haujlwm, uas tsis tsuas yog nce lub nqi ntawm cov khoom ntim thiab luam ntawv cov lag luam thiab qeeb lub sijhawm, tab sis tseem tuaj yeem coj cov teeb meem ua haujlwm. Xyoo, raws li qhov tshwm sim ntawm txoj kev tuaj yeem, kev sib hloov, thaiv thiab thaiv cov xauv kua mis, qhov kev lag luam tau tshawb pom tias cov ntsev raws li ntsig reacts nrog cov khub uas muaj cov tshuaj qis dua los yog cov roj dawb ua rau xab npum. Tus cwj pwm nws tus kheej yog gelled, tus cwj pwm kua absorbs noo, cov xim pigment yog siab dhau lawm, cov phau ntawv thiab cov pigment siv yog kauj (tsis tsim nyog), lub binder thiab roj yog tsis zoo miscible, thiab lub pob binder yog acid. Cov kev sib yaj ntawm cov txheej txheem cov txheej txheem los ntawm cov pigment kuj accelerates lub gelation, etc. Txoj kev cais tawm yog feem ntau raws li nram no:
l. Thaum thickening los yog gelation vim ntau polymerization ntawm tus binder, ntxiv aliphatic hydrocarbons, esters, ketones, thiab lwm yam. Rau dilute.
2. Cov kua uas yog gelatinized uas ua rau xab npum muab ntxiv rau lub rosin thiab yaj nyob rau hauv linoleum los ntawm kev siv nws cov tshuaj qaub siab acid.
3. Qhov sib ntxiv ntawm ib lub raj muaj ntsev rau lub plhaub rau ntawm tus cwj pwm yog ib txoj kev siv yav dhau los.
4. Duav tau cov tshuaj los ntawm kev ntxiv cov khoom ntsev.
Nyob rau hauv kev saib ntawm cov lus saum toj no-hais, kev lag luam txheeb xyuas cov qauv ntawm cov ink formulation, ntsuam xyuas cov khoom lag luam tshiab rau kev tiv thaiv thiab cov zuag hluav taws xob, thiab xaus lus tias: Yizheng Tianyang Chemical Plant (lub teb chaws tsis pub tshuaj xyuas dawb) ib qho kev txhim kho phosphoric acid. Ntxiv rau qhov zoo tshaj plaws dispersing cov khoom ntawm cov xim, ester octanoate coupling tus neeg sawv cev muaj cov nyhuv tshwj xeeb ntawm "Sudden rejuvenation" ntawm tus swelled thiab gelled number case. Piv txwv, hauv kev luam ntawv, nws tsuas yog tsim nyog ntxiv 3-5% kev tiv thaiv kev lag luam thiab cov zuag hluav taws xob nkag mus rau ntawm tus cwj mem zom zuag los txhawb cov lus hais saum toj no, rov qab muab tus qauv ntawm tus cwj pwm rov qab, thiab rov qab tuaj rau ntawm qhov siab. Raws li tus yam ntxwv ntawm kev tiv thaiv kev lag luam thiab cov neeg tawg nthe uas ua los ntawm Yizheng Tianyang Chemical Plant, peb tsuas xav tau ncaj qha ntxiv 1.5 ~ 2.5% ua kua nplaum rau ntawm tus qauv numbering kom tsis txhob muaj cov o thiab cov kua roj ntawm cov ntawv luam tawm. . Nws tseem tuaj yeem diluted nrog toluene los yog xylene ib los ntawm ib qho thiab ces ntxiv rau hauv cov xaum xauv npoo los ua av thiab dispersed ua ke, uas tau zoo heev txhim kho lub dispersibility ntawm cov pigment thiab tiv thaiv tus number case ntawm o tuaj thaum lub sij hawm ntau lawm, cia thiab luam ntawv. Cov kab los yog cov xim tsis zoo los ntawm kev tuaj yeem, nag lossis daus. Nyob rau tib lub sijhawm, nws tuaj yeem txhim kho qhov degree ntawm tus lej dauv thiab ua rau daim nplaum xim ntawm tus cwj pwm zaj duab xis, thiab yuav txo tau qhov cub ci thiab cov cua ntawm tus cwj mem los yog lub hom kua qaub (hom hnyav) zoo txhawb cov fluidity ntawm qhov kev luam tawm ntawm tus cwj mem. .
Cov kev sib raug zoo ntawm cov gelation thiab viscosity ntawm number case
Tom qab ntawd nws yog los muab thawj tus qauv ntawm tus cwj mem los, uas yog, ua tiav qhov teeb meem uas yog qhov tseem ceeb. Qhov no qhia tau hais tias tus viscosity ntawm tus number case muaj ntau heev ua nrog gelation. Los ntawm number case viscosity txhais tau hais tias muaj ntau lub cev uas ntsuas kev xauv npo ntawm ib tus cwj pwm, xa mus rau qhov ua kom muaj zog. Muaj ntau txoj hau kev ntsuas qhov ntsuas, thiab feem ntau yog ib qho capillary viscometer, ib qho pore me viscometer, ib qho vis viscos, thiab ib lub khob sab nraud thiab plhom visor.
Cov yam cuam tshuam txog viscosity yog: viscosity yog zoo txog kub, concentration of tivthaiv tivthaiv, particle loj, thiab lwm yam., Thiab muaj kev sib raug zoo nrog kub thiab siab. Kev ntsuas kev ntsuas thiab kev ntsuas ntawm kev ntsuas ntau hom kev sib txawv yog sib txawv thiab tsis tuaj yeem hloov siab rau ib leeg.
Cov cwj mem yog tsim los ntawm cov organic solvent, binder, pigment, additive, binder, thiab cov zoo li. Thaum cov ntaub ntawv raw li tau txiav txim, qhov kev ua tiav ntawm qhov kev ua tiav, cov qauv, thiab cov kev ua tiav ntawm txhua feem puas tau txiav txim siab, thiab kev hloov pigment feem ntau yog hais txog kev xiam oob khab ntawm tus cwj mem. Kev xyaum tau ua pov thawj tias tus number case printing viscosity muaj qee yam (11-24S, uas siv Zahn viscosity khob No. 3), qhov ntau dua ntawm cov ink ntawm printing, qhov loj tuaj ntawm kev hloov pigment. Vim hais tias qhov kev txiav txim ntawm qhov hnyav yog ua kom yaj lossis cov tshuaj ntxiv thiab tus neeg pabcuam ntim cov kua, qhov fluidity yog imparted kom cov pigment yooj yim mus dispers. Thaum cov duab ntawm tus cwj mem zis muaj ntau heev, tag nrho cov xaum xaum xauv hauv lub xeev uas muaj qhov tshaj plaws, thiab cov pigment thiab cov zoo li cov pluag tsis zoo, thiab nws tuaj yeem tsis muaj teeb meem, tab sis nws yog tsim rau hauv pawg, uas yog yooj yim yuav tsum tau muab coj los ua ib qho gelatinization, ib lub micelle, ib pawg, thiab ib cov plaub hau. Cov aggregates swollen kom lub pigment tsis smoothly nkag thiab tawm ntawm cov mesh. Thaum cov ntawv luam tawm viscosity loj dhau lawm, lub pigment tsis txawm nkag mus rau hauv lub mesh txhua, thiab nws tseem nyuaj dua los hloov. Qhov no yog qhov uas feem ntau raug xa mus rau qhov teeb meem kev ntsaws ntsej muag. Yog li no, peb tsuas xav ua kom lub cev tsis muaj zog, muaj xim thiab lwm cov tshuaj organic uas tsis yog nyob hauv xeev, tab sis nyob rau hauv lub xeev uas tsis muaj teeb meem, los yog lub xeev uas tsis yog saturated, kom pigments thiab cov zoo li yuav tsum tau zoo dispersed therein ua ib qho zoo tib yam thiab kev sib koom tes zoo. Yog li ntawd cov pigment nkag thiab tawm lub mesh smoothly, thiab qhov teeb meem ntawm tsis ua hauj lwm yuav daws tau. Qee tus cwj pwm manufacturers xav kom muab cov ntawv luam tawm viscosity ntawm 15 thiab 18 feeb (Zahn viscosity khob No. 3). Txawm li cas los xij, hauv kev xyaum, tshwj xeeb tshaj yog hauv cov tshuab luam ntawv loj ceev (luam ceev ntawm 100 ~ 260m / min), kom muaj kev hloov zoo, tab sis kuj ntev ntev, kev ua kom zoo dua, ink printing viscosity yog feem ntau 11 ~ 15S (Nrhiav qhov zoo ntawm lub xeev qhov chaw ntawm Zahn Viscosity Cup No. 3).
Txawm li cas los xij, yog hais tias tus lej luam tawm viscosity tsawg dhau lawm, nws txhais tau hais tias cov ntsiab lus ntawm cov organic hnyav ntawm tus number case yog loj, thiab lub cheebtsam xws li cov ntaub pua chaw thiab cov pigment yog tus me me, yog li ntawd cov duab zaj duab xis tsis tuaj yeem tsim thaum qhuav, thiab sau cov khoom yuav tsum tau dawb thiab ua npub. Lub teeb, tsis muaj luster. Yog li, yog tias cov ntawv luam tawm xav tau lub zoo gloss, nws feem ntau yog siv los siv tus loj dua ntim printing viscosity (13 mus 19S Zahn viscosity khob No. 3).
Nyob rau tib lub sijhawm, raws li cov av qaub ncaug niaj hnub, tus lej number case printing yog siab dua 16S (Cahn viscosity khob No. 3), thiab feem ntau hluav taws xob feem ntau tsis tshwm sim. Tus number case printing viscosity yog hauv qab 16S (Zahn viscosity khob No. 3). Raws li cov viscosity me me, electrostatic phenomena xws li whisker, streak, ntug repulsion, flying number case, hloov plawv, thiab cov xim tsis tshua muaj dej tsis zoo yuav ua raws li. Nws tau tshwm sim thiab tsim txom heev.
Hauv kev pom ntawm cov lus saum toj no, cov kws txawj lag luam ntseeg tau tias qhov zoo tshaj hauv lub xeev ntawm ink printing viscosity feem ntau muaj nyob ntawm 11 thiab 17S (Zahn viscosity khob No. 3). Yog tias muaj hluav taws xob nyob hauv qhov sib txawv no, txhim kho hluav taws xob uas siv hluav taws xob los yog siv tshuaj tua kab mob los tiv thaiv tus txheej txheem luam ntawv. Tiv thaiv kom o, gelatinization, xyuas kom zoo ntawm cov khoom luam tawm, txhim kho qhov nce thiab tawm los, thiab tsim kev pab ntau dua.