Carboxy methyl cellulose (CMC) yog lub cellulose derivative nrog cov pawg carboxymethyl ntawm glucopyranose monomers uas ua rau lub cellulose caj qaum. Nws yog qhov tseem ceeb muaj polymer vim nws cov khoom tshwj xeeb xws li cov viscosity siab, tsis muaj txiaj ntsig, thiab cov dej muaj txiaj ntsig tsis zoo, thiab cov dej muaj txiaj ntsig tsis zoo, thiab cov dej muaj kuab lom. Hauv kev lag luam ntawv, CMC ua lub luag haujlwm tseem ceeb hauv kev txhim kho qhov zoo thiab kev ua tau zoo ntawm cov ntawv ntau lawm.
Cov khoom ntawm CMC muaj feem xyuam rau daim ntawv kev lag luam
Dej solubility thiab viscosity: cmc dissolves nkag tau hauv dej, sib sau cov ntsiab lus meej, viscous. Cov cuab yeej no yog qhov tseem ceeb rau nws siv hauv cov ntawv txheej thiab cov ntawv thov sizing uas nws yuav tsum tau muab faib rau tusyees.
Zaj duab xis tsim muaj peev xwm: CMC tuaj yeem tsim cov yeeb yaj kiab, uas tau txais txiaj ntsig hauv kev kho mob thiab pleev xim kom txhim kho daim ntawv luam tawm thiab tsos.
Cov khoom nplaum nplaum: nws ua raws li phau ntawv qhia, txhim kho cov cohesion ntawm fibers thiab fillers hauv daim ntawv matrix.
Tsis-toxicity: Ua ib qho tsis muaj tshuaj lom thiab biodegradable cov yeeb yaj kiab, cmc ua ke nrog cov qauv kev nyab xeeb thiab kev nyab xeeb ntawm cov ntawv kev lag luam.
Cov ntawv thov ntawm CMC hauv kev lag luam daim ntawv
Nto sizing:
Nto sizing yog cov txheej txheem ntawm kev thov kev daws teeb meem rau cov ntawv los txhim kho nws lub zog thiab cov tshuab luam tawm. CMC feem ntau siv nyob rau hauv nto sizing formulations vim tias nws txhim kho lub zog saum npoo, thiab muab ib tug du thiab tsis muaj zog. Lub kuab tshuaj tau ua rau CMC ua ib zaj yeeb yaj kiab dhau daim ntawv sau ua ke, ua kom tau zoo dua rau dej thiab inks, Li no tau txhim kho luam tawm zoo thiab txo cov kua mis los ntshav.
Cov txheej:
CMC tau siv dav hauv cov ntawv txheej ua yeeb yam. Txheej ci tau thov rau daim ntawv los txhim kho qhov ci ci, du, thiab tshuab luam tawm. CMC ua raws li phau ntawv nyob rau hauv cov txheej txheej no, tuav cov pigments ua ke thiab khi lawv rau daim ntawv nto. Qhov no ua rau muaj kev sib txawv thiab pom tau zoo, txhim kho cov lus nug pom thiab kev ua haujlwm ntawm daim ntawv. Tsis tas li ntawd, cov zaj duab xis-ua cov cuab yeej ntawm cmc pab hauv kev tsim cov nyom uas tuaj yeem tiv thaiv cov ntaub ntawv luam tawm.
Txhim kho ntawm daim ntawv lub zog:
CMC txhim kho cov tshuab ua kom muaj zog ntawm daim ntawv. Thaum ntxiv rau lub sam thiaj, nws txhim kho txoj kev sib raug zoo ntawm cov fibers, ua rau muaj zog ntau ntxiv, tawg ua lub zog, thiab muab kev ua kom tawg. Qhov no yog qhov tshwj xeeb tshaj yog rau cov ntawv luam zoo, ntim khoom, thiab lwm cov ntawv tshwj xeeb uas muaj zog yog qhov tseem ceeb.
Cov Kev Pab Them Nyiaj:
Hauv cov txheej txheem ntub dej-kawg ntawm cov ntawv sau, CMC muaj haujlwm ua cov kev pabcuam tsis tuaj yeem, pab tswj cov khoom zoo thiab muab cov ntawv sau cia hauv daim ntawv matrix. Qhov no tsis tsuas yog txhim kho cov ntawv sau ua ke thiab cov tsos tab sis kuj ua rau cov txheej txheem ua haujlwm ntawm cov txheej txheem tsis muaj txiaj ntsig hauv cov khoom pov tseg hauv cov dej khib nyiab.
Rheology kho mob rhuaurier:
CMC yog siv los ua cov rheology kho hauv cov txheej txheem papermakaking los tswj cov khoom ntws ntawm ntau qhov kev ncua ntawv Auqueous thiab txheej. Los ntawm kev kho lub viscosity, cmc kom cov haujlwm ua haujlwm du ntawm cov tshuab thiab cov khoom faib ntawm cov txheej txheem, ua rau cov khoom lag luam zoo sib xws thiab cov khoom lag luam zoo.
Cov nplaum thiab cov nyom caj dab:
Cov khoom nplaum ntawm CMC ua rau nws muaj txiaj ntsig zoo hauv kev tsim cov ntawv nplaum thiab cov nyom. Nws muab kev sib cog lus zoo tshaj plaws, yog ib qho yooj yim thov, thiab muaj kev nyab xeeb rau siv rau hauv ntau cov ntawv khoom, suav nrog cov uas siv hauv ntim zaub mov.
Cov Khoom Siv Teeb Meem:
CMC tuaj yeem txhim kho cov teeb meem ntawm daim ntawv, ua rau nws tiv taus roj ntau dua, roj, thiab noo noo. Qhov no muaj txiaj ntsig zoo tshwj xeeb hauv kev ntim cov ntawv thov uas tiv thaiv los ntawm cov teeb meem ib puag ncig yog qhov tseem ceeb. CMC-kho cov ntaub ntawv tuaj yeem siv rau ntim cov khoom noj, muab cov khoom siv biodegradable thiab muaj kev xaiv kom muaj rau cov txheej yas.
Kev Kho Mob Khib Khib:
Thaum lub sij hawm cov txheej txheem papermakakaking, loj tagnrho dej yog siv thiab tom qab kho ua ntej raug tso tawm lossis rov ua dua tshiab. CMC tuaj yeem pab tau nyob rau hauv kev kho mob ntawm quav dej los ntawm kev ua yeeb yam raws li flocculant, pab tshem tawm cov khib nyiab thiab lwm yam paug. Qhov no pab kom muaj txiaj ntsig zoo dua thiab ib puag ncig dej tswj cov dej ua hauv kev lag luam ntawv.
Mechanisms ntawm kev ua
Sib txuam nrog:
CMC sib cuam tshuam nrog cov cellulose bibers los ntawm hydrogen delding thiab van der waagals rog, uas txhim kho fiber ntau-rau-fiber bonding. Qhov kev sib cuam tshuam no yog qhov tseem ceeb heev rau kev txhim kho cov khoom siv cov tshuab, raws li nws nce qhov cohesion thiab adhesion ntawm ib leeg.
Zaj duab xis tsim:
Thaum CMC tau thov rau cov ntawv sau, nws ua cov yeeb yaj kiab txuas ntxiv uas tuaj yeem encapsulate fibers thiab fillers. Zaj yeeb yaj kiab no ua rau muaj kev cuam tshuam rau dej thiab roj, txhim kho daim ntawv tiv thaiv rau cov tshuaj no thiab txhim kho nws cov ntawv luam tawm.
Viscosity tswj:
Los ntawm kev kho lub viscosity ntawm cov painting thiab raug tshem tawm, CMC ua kom pom tau txawm thov thiab xa tawm. Qhov no yog qhov tseem ceeb rau kev ua tiav cov txheej txheem qub thiab zoo ib yam zoo nyob rau hauv cov ntawv kawg cov khoom.
Retiste Siv lub tshuab:
CMC txhim kho kev ua kom tiav ntawm cov lim thiab cov khoom zoo hauv daim ntawv matrix los ntawm kev ua yeeb yam raws li flocculant. Nws tau sib sau ua ke cov khoom me me no rau hauv cov loj dua uas yooj yim dua khaws cia hauv cov ntawv fibrous, yog li txhim kho cov ntawv thiab txo cov khoom poob.
Cov txiaj ntsig ntawm kev siv CMC hauv kev lag luam ntawv
Txhim kho kom zoo:
Kev siv CMC cov txiaj ntsig hauv cov khoom lag luam zoo dua nrog kev txhim kho cov tshuab luam ntawv, lub zog, thiab tsos. Qhov no yog qhov tshwj xeeb tshaj yog rau cov ntawv thov high-kawg xws li ntim, luam ntawv, thiab ntaub ntawv tshwj xeeb.
Tus nqi efficiency:
Los ntawm kev txhim kho kev ceev thiab txo cov khoom poob khoom, CMC muaj kev txhawb nqa rau cov txheej txheem ntau ntxiv-siv tau ntau lawm. Nws tseem txhim kho kev ua yeeb yam ntawm cov txheej txheem thiab cov nplaum, txo qhov xav tau rau kev ntxiv ntxiv thiab kev kho mob.
Ib puag ncig sustainability:
CMC yog cov khoom siv biodegradable thiab cov khoom tsis muaj tshuaj lom, ua rau nws ib puag ncig tus phooj ywg xaiv rau kev lag luam ntawv. Nws siv tuaj yeem pab txo cov kev cuam tshuam ib puag ncig ntawm cov ntawv tsim khoom, tshwj xeeb tshaj yog hais txog kev kho dej kom zoo thiab txo cov hluavtaws ntxiv.
Versatility:
Cov versatility ntawm CMC tso cai rau nws siv rau hauv ntau theem ntawm ntawv ntawm cov ntawv sau, los ntawm pulp kev kho rau cov rooj ntev. Qhov no ua rau nws muaj txiaj ntsig zoo ntxiv uas tuaj yeem hais txog ntau yam kev xav tau nyob hauv kev lag luam.
Carboxy methyl cellulose (cmc) ua lub luag haujlwm tseem ceeb hauv kev lag luam daim ntawv, muab ntau cov txiaj ntsig los ntawm kev txhim kho cov khoom ua tau zoo thiab ib puag ncig cov kev ua tau zoo. Nws cov khoom tshwj xeeb ua rau nws tsis tseem ceeb ntxiv rau hauv nto sizing, txheej, lub zog txhim kho, thiab ntau lwm cov ntawv thov. Raws li kev lag luam txuas ntxiv mus nrhiav kev ua haujlwm ntau dua thiab cov hom phiaj tsim nyog, lub luag haujlwm ntawm CMC yog qhov tseem ceeb tshaj plaws, ua rau muaj cov khoom lag luam zoo dua thiab ntau cov ntawv xa khoom.
Lub Sijhawm Post: Feb-18-2025