Carbonless luam ntawv muab faib ua daim ntawv sab saud, ntawv nruab nrab thiab ntawv sab saud. Carbonless daim ntawv yog dav siv rau nws yooj yim, simplicity, thiab huv si. Cov tsos, xim rendering nyhuv, inking kev ua tau zoo, thiab nto lub zog ntawm carbonless daim ntawv yuav tag nrho cov cuam tshuam rau kev siv ntawm carbonless daim ntawv. Ntxiv nrog rau cov thawj dawb thiab siab dawb, cov tsos ntawm cov ntawv tsis muaj cov ntawv luam tawm kuj muaj xim xws li daj, xiav, liab thiab ntsuab. Txawm hais tias qhov tsos ntawm cov xim uas tsis muaj cov ntawv luam tawm yog qhov zoo nkauj, nws yooj yim ua rau qee qhov teeb meem zoo, xws li cov pob dawb ntawm daim ntawv.
Qhov chaw dawb qhov teeb meem zoo ntawm cov ntawv tsis muaj cov ntawv luam feem ntau tshwm sim ntawm CF sab ntawm daim ntawv. Muaj ntau yam uas ua rau cov pob dawb ntawm CF sab. Feem ntau hais lus, muaj cov hauv qab no:
Tsis zoo ntawm dispersant yuav ua rau tsis zoo pigment dispersion nyhuv hauv cov xim; Thaum tus nqi ntawm cov dispersant me me, cov xim tsis tau qhwv los ntawm dispersant yuav flocculate thiab precipitate vim hluav taws xob attraction; Thaum tus nqi ntawm cov dispersant loj dhau lawm, cov dispersant ntau dhau yuav rhuav tshem cov hluav taws xob ob txheej txheej tsim los ntawm cov xim, ua rau tsis sib npaug ntawm cov nqi thiab ua rau nag lossis daus. Thaum cov txheej txheej yog siv rau ntawm lub tshuab, cov flocculated pigment hais tsis tuaj yeem coated thiab ua rau cov pob dawb ntawm daim ntawv. Qhov zoo tshaj plaws ntawm cov dispersant tuaj yeem txiav txim siab los ntawm kev sim tshuaj ntsuam xyuas, thiab feem ntau ntawm cov khoom tawg ntxiv yog li 0.5% -2.5% ntawm cov xim.
Tus nqi pH muaj qhov kev txiav txim siab ntawm qhov tawg (stability) ntawmcarbonless ntawv pigments. Thaum cov pigment dispersed, alkali tuaj yeem ntxiv los kho cov pH kom alkaline, nyiam dua ntawm 7.5 thiab 8.5.
Defoamers tshem tawm cov npuas hauv cov xim. Txawm li cas los xij, tus defoamer feem ntau yog cov organic uas nyuaj rau yaj hauv dej. Kev siv ntau dhau los yog tsis tsim nyog ntxiv txoj kev yuav ua rau lub defoamer los ua "huab point" ntawm daim ntawv, uas yuav ua rau cov txheej txheem CF tsis tuaj yeem siv thiab ua cov pob dawb. Qhov teeb meem no tuaj yeem daws tau los ntawm kev diluting kom zoo thiab txau rau ntawm qhov chaw ntawm cov xim nrog cov pa npuas.
CF txheej txheej muaj ntau cov pa npuas, thiab thaum txheej txheej yog siv, cov npuas npuas tawg rau ntawm daim ntawv, ua rau cov pob dawb. Qhov no kuj yog lub ntsiab yog vim li cascarbonless luam ntawv ua rau kab mob ntawm daim ntawv dawb. Qhov kev daws teeb meem yog ntxiv cov foam inhibitor los tiv thaiv kev tsim cov npuas thaum cov xim tawg, lossis ntxiv cov defoamer kom tshem tawm cov npuas uas twb tshwm sim lawm.
Lwm cov ntaub ntawv pabcuam (tshwj xeeb tshaj yog cov khoom siv organic) ntxiv rau CF coatings, yog tias qhov zoo ntawm cov roj nplua nyeem tsis zoo, nws yuav ua rau cov khoom tawg tsis zoo thiab lo rau daim ntawv, uas ua rau tsis ua haujlwm ntawm CF txheej los ua cov pob dawb. Yog li siv cov khoom siv tshuaj lom neeg zoo kom ntau li ntau tau.
Post lub sij hawm: Dec-05-2022