CMC siv hauv Ntawv Kev Lag Luam

Daim ntawv qib CMCyog raws li cellulose raws li cov khoom tseem ceeb, tom qab alkalization thiab ultra-fine kev kho mob, thiab tom qab ntawd los ntawm ntau yam tshuaj tiv thaiv xws li crosslinking, etherification thiab acidification ua los ntawm anion polymer nrog ether daim ntawv cog lus. Nws cov khoom tiav yog dawb los yog lub teeb daj hmoov los yog granular teeb meem. Tsis muaj tshuaj lom, tsis qab, tsis muaj ntxhiab, nrog dej tuav zoo, thiab zoo heev shear thinning.

Lub luag haujlwm tseem ceeb ntawm CMCSodium carboxymethyl cellulose hauv kev lag luam ntawv:

CMC yog siv los ua cov ntawv coated. Carboxymethyl cellulose tuaj yeem ua kom cov dej noo khaws cia ntawm cov txheej txheem los tiv thaiv kev tsiv teb tsaws ntawm cov nplaum nplaum hauv dej rau hauv daim ntawv, txhawm rau txhim kho qib ntawm txheej txheej thiab txhim kho cov txheej txheem zoo.

Vim tias CMC yog cov nplaum zoo heev, yog li cov nplaum nplaum nplaum zoo heev, carboxymethyl cellulose tuaj yeem hloov 3-4 hloov cov hmoov txhuv nplej siab los yog 2-3 cov hmoov txhuv nplej siab, tib lub sij hawm tuaj yeem txo cov latex, pab txhim kho cov txheej txheem txheej txheem. .

Thaum lub sij hawm txheej txheej tuaj yeem ua si cov nyhuv lubrication, ntxiv dag zog rau kev sib cais ntawm zaj duab xis, qhov sib piv ntawm zaj duab xis yog qhov zoo heev, tuaj yeem ua rau cov yeeb yaj kiab txuas ntxiv tau zoo, zam qhov "txiv kab ntxwv tev" qhov xwm txheej. Cov khoom siv tshuaj lom neeg ntawm sodium carboxymethyl cellulose CMC tau hais txog pseudoplastic, cov cuab yeej ntawm carboxymethyl cellulose tuaj yeem ua rau cov txheej txheem "pseudoplastic", uas ua rau cov txheej nyias nyias ntawm cov shear siab, tshwj xeeb tshaj yog tsim rau cov txheej txheem siab tawv lossis cov txheej txheem siab.

Vim tias cov tshuaj aqueous ntawm CMC muaj qhov tsis kam mus rau enzymatic hydrolysis thiab inert metabolism, lub txheej muaj kev ruaj ntseg zoo, uas yog manifested nyob rau hauv kev tswj cov homogeneity ntawm txheej, yog li ntawd lub txheej tsis yooj yim rau deteriorate thaum lub sij hawm cia. Qhov thib ob, CMC yog siv los ua qhov loj me ntawm daim ntawv pulp. Qhov loj me ntawm daim ntawv tuaj yeem ua kom nruj, smoothness, thiab txhim khu nws cov tawv tawv thiab permeability.

CMCUa tau zoo tswj kev khoov thiab tau txais kev luam ntawv zoo. Ntxiv ib qho kev faib ua feem ntawm CMC rau qhov loj me tuaj yeem ua rau qhov chaw ua tiav zoo sealing, thiab lub ntsej muag ntawm kev luam ntawv tuaj yeem txhim kho qhov pom tseeb ntawm cov xim luam ntawv thiab txuag tus number case. CMC aqueous tov muaj cov zaj duab xis tsim tau zoo heev, yog li CMC nyob rau hauv lub nto sizing tus neeg saib xyuas yog conducive rau cov zaj duab xis tsim ntawm sizing tus neeg saib xyuas ntawm daim ntawv, thiaj li mus txhim kho cov nto sizing nyhuv.

Txawm li cas los xij, vim yog tus nqi siab dua ntawm CMC, nws feem ntau tsuas yog siv rau cov ntawv uas yuav tsum tau tshwj xeeb (daim ntawv sau nyiaj, ntawv pov thawj, ntawv zoo nkauj, tso tawm cov ntawv hauv qab thiab qib siab ob daim ntawv nplaum).

CMC yog siv nyob rau hauv ntub kawg ntawm daim ntawv tshuab ntxiv, yav dhau los, sodium carboxymethyl cellulose CMC nyob rau hauv papermaking industrial yog tsuas yog siv nyob rau hauv txheej thiab nto sizing, pulp nrog lub innovation ntawm science thiab technology, nyob rau hauv xyoo tas los no thoob ntiaj teb muaj ntau heev. ntawm daim ntawv manufacturers los ntawm ntub kawg CMC tau ntxiv los txhim kho cov khoom zoo thiab cov kev ua tau zoo kuj tseem ceeb heev.

Ntxiv CMC rau qhov kawg ntub muab ntau yam txiaj ntsig loj:

1.Txhawm rau txhim kho qhov sib npaug ntawm daim ntawv CMC yog qhov zoo heev dispersant, yaj ua colloidal reagent CMC yog ntxiv rau kev kho cov slurry tom qab yooj yim ua ke nrog pulp fiber thiab sau cov khoom hais, vim kev ua haujlwm electronegative CMC yog yaj hauv dej, nws yuav ua rau nws tus kheej. twb muaj cov ntawv fiber ntau thiab muab tub lim cov ntsiab lus ntawm cov nqi tsis zoo electronegativity nce, cov khoom uas muaj tib lub nqi yuav rov ua dua ib leeg, thiab cov fiber ntau thiab cov muab tub lim hauv daim ntawv raug tshem tawm yuav raug faib ntau dua, uas yog qhov zoo dua rau kev tsim cov ntawv. kev lag luam, thiab ces txhim kho cov uniformity ntawm daim ntawv.

2. Txhim kho lub zog lub cev ntawm lub sam thiaj los txhim kho qhov kev sib tw ntawm lub pulp (xws li folding, butter kuj thiab folding, becting tsis kam), tawg rau hauv cov kev hloov ntawm cov ntawv sau tseg ntawm tib lub sij hawm kuj nce lub cev lub zog ntawm lub pulp. CMC qauv muaj carboxymethyl tuaj yeem haus hydroxyl ntawm fiber ntau ua rau cov tshuaj tiv thaiv sib xyaw ua ke, sib sau ua ke ntawm lub zog ntawm cov fibers, los ntawm kev tsim lub cev ntawm cov txheej txheem tsim khoom tom qab lub tshuab ntawv, lub zog ntawm cov fibers yuav ua tau zoo heev, cov nyhuv ntawm lub cev tseem ceeb ntawm nplooj ntawv yog tag nrho cov nce hauv lub cev rigidity.

Daim ntawv qib CMC siv:

Hauv kev lag luam ntawv, CMC yog siv rau hauv cov txheej txheem pulping, uas tuaj yeem txhim kho tus nqi tuav thiab ua kom muaj zog ntub dej. Siv rau saum npoo sizing, raws li ib tug pigment excipient, txhim kho nrog adhesion, txo cov plua plav luam ntawv, txhim kho luam ntawv zoo; Siv rau cov ntawv txheej, yog qhov zoo rau dispersion thiab fluidity ntawm cov xim, txhim khu cov ntawv smoothness, smoothness, optical zog thiab luam ntawv adaptability. Nyob rau hauv daim ntawv kev lag luam raws li ib tug tsim nyog tus nqi thiab ntau yam additives, feem ntau yog vim nws cov dej-soluble polymer zaj duab xis tsim thiab roj kuj.

●Siv rau cov ntawv sizing, yog li ntawd cov ntawv muaj qhov siab, zoo nkauj permeability tiv taus, sau ntawv siab thiab smoothness.

●tuaj yeem txhim kho daim ntawv sab hauv fiber ntau viscosity xeev, txhawm rau txhim kho daim ntawv lub zog thiab folding kuj.

●Nyob rau hauv daim ntawv thiab daim ntawv colouring txheej txheem, CMC pab tswj cov ndlwg ntawm xim muab tshuaj txhuam thiab zoo number case nqus.

Feem ntau, cov tshuaj pom zoo yog 0.3-1.5%.