Hauvpapermaking kev lag luam, Carboxymethyl Cellulose (CMC)yog ib qho tseem ceeb functional additive muaj nuj nqis rau nwstuab, zaj duab xis- tsim, thiabdej- tuavkhoom. Xaiv thiab siv cov qib zoo ntawmntawv -qib CMCNws yog ib qho tseem ceeb rau kev txhim kho daim ntawv lub zog, nto smoothness, thiab printability thaum tswj tus nqi efficiency thiab ntau lawm stability.
Tsab ntawv xov xwm no muab cov ntsiab lus tseem ceeb rau kev xaiv CMC thiab cov lus qhia tswv yim rau nws daim ntawv thov, pab cov neeg tsim ntawv txhim kho kev ua tau zoo thiab cov txheej txheem ua haujlwm.
I. Lub luag haujlwm tseem ceeb ntawm CMC hauv Papermaking
1. Txhim kho daim ntawv muaj zog
CMC ua raws li tus neeg sawv cev txhawb nqa los ntawm kev tsim cov hydrogen bonds nrog cellulose fibers. Qhov kev sib tshuam no tseem ceeb txhim kho ob qho tib siqhuav thiab ntub tensile zogzoo litawg tsis kam. Nws yog qhov tshwj xeeb tshaj yog nyob rau hauv siab - cov ntaub ntawv kab lis kev cai zoo, cov ntaub ntawv ntaub so ntswg, thiab cov qib tshwj xeeb uas yuav tsum tau ua kom ntev.
2. Txhim kho cov khoom nto
Thaum siv raws li ib tugnto sizing tus neeg sawv cevlos yog nyob rau hauv txheej formulations, CMC daim ntawv auniform thiab nruam zaj duab xisntawm daim ntawv nto. Qhov no txhim khosmoothness, gloss, thiabink txais, ua rau kom zoo dua printability thiab ib tug ntau refined daim ntawv tsos.
3. Ua kom cov txheej txheem ruaj khov
CMC muab qhov zoo tshaj plawsdispersion ntawm pigments thiab fillers, tiv thaiv agglomeration. Nwsdej- muaj peev xwm tuav taupab tswj cov txheej txheem ruaj khov, txo qhov ziab ntxov ntxov, thiab ua kom cov ntawv siv tsis sib xws - txhua yam uas ua rau kev ua haujlwm smoother ntawm lub tshuab ntawv.
II. Yuav Xaiv Cov Ntawv Zoo Li Cas -Qib CMC
1. Sib npaug qib rau daim ntawv thov
Rau Txheej:Sivsiab -Viscosity CMClos txhim kho txheej txheej lub cev thiab dej tuav.
Rau Surface Sizing:Xaiv ibKev hloov pauv nruab nrab (DS 0.6-0.9)qib nrog siab pob tshab rau kev tsim cov yeeb yaj kiab zoo dua.
Rau ntub-End Ntxiv:Xaivlow-viscosity, siab-purity CMClos xyuas kom meej dispersion tsis cuam tshuam rau cov kua dej.
2. Tswj Kev Hloov Kho Degree (DS) thiab Viscosity
CovDegree of Hloov (DS)txiav txim siab solubility thiab tsis kam rau electrolytes. Rau papermaking, DS feem ntau yog nyob nruab nrab ntawm0.6–0.9.
Viscosity yog lwm yam tseem ceeb - a2% aqueous dawsfeem ntau ntog ntawm400-2000 mPa · s, nyob ntawm daim ntawv thov. Cov qib viscosity qis dua yog qhov zoo dua rau kev ntxiv dag zog, thaum cov viscosity siab dua yog qhov zoo tagnrho rau txheej los yog thickening.
3. Ua kom cov khoom sib xyaw ua ke
CMC yuav tsum tau sib xws nrog lwm yam papermaking additives xws lihmoov nplej, PVA, thiabhluavtaws binders. Zoo compatibility tiv thaiv coagulation los yog theem sib cais, tswj txheej stability thiab zoo ib yam khoom zoo.
III. Cov kev coj ua zoo tshaj plaws rau kev thov CMC
Ua ntej-kev puas tsuaj:Maj mam ntxiv CMC rau hauv dej huv ntawm20-30 degreenyob rau hauv stirring kom tsis txhob lumps thiab xyuas kom meej ib tug du tov.
Noj ntau npaum:Siv0.1%–0.5%nyob rau hauv txheej formulations thiab0.2%–1.0%nyob rau hauv qhov chaw sizing systems. Kho raws li kev tsim khoom.
Txheej Txheem:Ntxiv cov tshuaj CMCua ntejpigments, emulsions, los yog fillers kom zoo dua dispersion thiab viscosity tswj.
Kev tuav kom zoo ua kom muaj txiaj ntsig zoo tshaj plaws ntawm CMC thiab txo cov khib nyiab lossis kev tsim tsis ruaj khov.
Xaus
Xaiv qhov raugntawv -qib CMCthiab siv nws kom zoo tuaj yeem txhim kho daim ntawv lub zog, qhov pom ntawm qhov chaw, thiab kev ruaj ntseg ntau lawm. Los ntawm kev tswj hwm qhov tseem ceeb xws li viscosity, hloov pauv qib, thiab kev sib raug zoo, cov neeg ua ntawv tuaj yeem siv cov txiaj ntsig ntawmCarboxymethyl Cellulosenyob rau hauv ntau qib ntawv.
Txhawm rau kom tau txais txiaj ntsig zoo, nws yog qhov tseem ceeb rau kev koom tes nrog atxhim khu kev qha CMC chaw tsim tshuaj pausleej twg tuaj yeem muab tausiab -purity, zoo ib yam, thiab kev txhawb nqahaum rau koj cov kev xav tau papermaking.
Nrhiav ib tus neeg xa khoom ntseeg siab ntawm daim ntawv -qib CMC?
Tiv tauj peb hnub no los thov cov qauv los yog sib tham txog qib customized rau koj cov ntawv tsim.
