Sodium carboxymethylcellulose (CMC) yog ib qho tshuaj lom neeg ntau yam nrog kev siv dav hauv ntau qhov kev lag luam, tshwj xeeb hauv kev lag luam papermaking. Qhov no carbohydrate derivative yog muab los ntawm cellulose, uas yog ib tug natural polymer pom nyob rau hauv cov nroj tsuag cell phab ntsa. CMC yog synthesized los ntawm reacting cellulose nrog sodium hydroxide thiab chloroacetic acid los yog nws sodium ntsev. Cov txiaj ntsig tau yog dej-soluble thiab muaj cov khoom tshwj xeeb uas ua rau nws muaj txiaj ntsig hauv ntau daim ntawv thov.
1.Pulp Kev npaj:
CMC feem ntau yog siv los ua ib feem nyob rau hauv ntub kawg ntawm cov txheej txheem papermaking. Nws pab nyob rau hauv dispersion ntawm fibers thiab lwm yam additives nyob rau hauv dej, yooj yim tsim ib homogeneous pulp slurry.
Nws lub peev xwm tuav dej siab pab tswj xyuas qhov sib xws ntawm cov pulp slurry, kom ntseeg tau tias muaj kev sib luag hauv cov ntawv tsim.
2.Retention thiab Drainage:
Ib qho ntawm cov teeb meem tseem ceeb hauv papermaking yog ua kom muaj kev ruaj ntseg ntawm fibers thiab additives thaum ua kom dej ntws tawm ntawm cov ntaub so ntswg. CMC pab daws qhov teeb meem no los ntawm kev txhim kho ob qho tib si khaws cia thiab cov dej ntws tawm.
Raws li kev tuav pov hwm, CMC khi rau fibers thiab nplua, tiv thaiv lawv cov kev poob thaum lub sij hawm tsim ntawm daim ntawv.
CMC txhim kho cov kua dej los ntawm kev nce tus nqi ntawm cov dej tawm ntawm cov ntaub so ntswg, ua rau kom dewatering sai dua thiab ntau dua cov ntawv tshuab ceev.
3. Kev Txhim Kho Lub Zog:
CMC txhawb nqa lub zog ntawm daim ntawv, suav nrog lub zog tensile, tsim kua muag, thiab tawg lub zog. Nws tsim ib lub network nyob rau hauv daim ntawv matrix, zoo txhawb cov qauv thiab txhim kho nws cov khoom siv kho tshuab.
Los ntawm kev txhim kho daim ntawv muaj zog, CMC tso cai rau kev tsim cov ntawv nyias nyias yam tsis muaj kev cuam tshuam kev ua tau zoo, yog li ua rau kev txuag nqi thiab kev ua haujlwm zoo.
4. Nto Sizing:
Nto sizing yog ib kauj ruam tseem ceeb hauv papermaking uas yuav tsum siv cov txheej nyias nyias ntawm cov neeg ua hauj lwm sizing rau saum npoo ntawm daim ntawv los txhim kho nws cov luam ntawv, smoothness, thiab dej tsis kam.
CMC yog ua hauj lwm raws li tus neeg sawv cev sizing nto vim nws cov yeeb yaj kiab tsim cov khoom thiab muaj peev xwm los txhim kho lub zog saum npoo thiab smoothness. Nws tsim ib txheej txheej ntawm daim ntawv saum npoo, uas ua rau muaj kev txhim kho tus cwj mem tuav thiab luam ntawv zoo.
5.Retention Aid rau Fillers thiab Pigments:
Hauv papermaking, fillers thiab pigments feem ntau tau ntxiv los txhim kho daim ntawv xws li opacity, brightness, thiab printability. Txawm li cas los xij, cov additives no tuaj yeem ua rau cov dej poob thaum lub sijhawm ua ntawv.
CMC yog ib qho kev pab khaws cia rau cov fillers thiab pigments, pab thauj tog rau nkoj hauv daim ntawv matrix thiab txo lawv qhov poob thaum tsim thiab ziab.
6.Control ntawm Rheological Properties:
Rheology hais txog tus cwj pwm ntws ntawm cov kua dej, suav nrog cov kua txiv hmab txiv ntoo, hauv cov txheej txheem papermaking. Kev tswj cov khoom rheological yog qhov tseem ceeb rau kev txhim kho cov txheej txheem kev ua tau zoo thiab cov khoom zoo.
CMC cuam tshuam cov rheology ntawm cov ntaub ntawv slurries los ntawm kev hloov kho lawv cov viscosity thiab ntws yam ntxwv. Nws tuaj yeem siv los kho cov khoom rheological ntawm cov tawv nqaij kom haum rau kev ua haujlwm tshwj xeeb, xws li kev txhim kho lub tshuab khiav thiab kev tsim daim ntawv.
7. Kev txiav txim siab ib puag ncig:
Sodium carboxymethylcellulose feem ntau suav hais tias yog ib puag ncig tus phooj ywg, vim nws tau muab los ntawm cov khoom siv hluav taws xob txuas dua tshiab thiab yog biodegradable.
Nws siv hauv papermaking tuaj yeem pab txhawb rau kev tsim cov khoom lag luam ntawv zoo dua los ntawm kev ua kom muaj peev txheej tsim tau zoo thiab txhim kho cov khoom lag luam.
sodium carboxymethylcellulose (CMC) plays lub luag haujlwm ntau yam hauv kev lag luam papermaking, ua cov khoom siv ntau yam ntxiv uas txhim kho ntau yam ntawm cov txheej txheem tsim ntawv. Los ntawm kev npaj pulp mus rau qhov loj me, CMC pab txhawb kev txhim kho cov txheej txheem, cov khoom zoo, thiab kev ruaj ntseg ib puag ncig. Nws qhov tshwj xeeb ua ke ntawm cov khoom ua rau nws tseem ceeb rau cov neeg tsim ntawv nrhiav kev ua kom zoo dua qub thiab ua tau raws li qhov xav tau ntawm kev ua lag luam.
Post lub sij hawm: May-06-2024