Puas yog daim ntawv ua los ntawm cellulose?

daim ntawv yog tsim los ntawmcellulosefibers, uas yog muab los ntawm cov ntaub ntawv cog xws li ntoo pulp, paj rwb, los yog lwm yam nroj tsuag fibrous. Cov cellulose fibers no tau ua tiav thiab tsim rau hauv cov ntawv nyias los ntawm kev kho tshuab thiab tshuaj lom neeg. Cov txheej txheem feem ntau pib nrog cov ntoo los yog lwm cov nroj tsuag uas muaj cov ntsiab lus cellulose siab. Tom qab ntawd, cov cellulose tau muab rho tawm los ntawm ntau txoj hauv kev xws li pulping, qhov twg cov ntoo lossis cov khoom cog tau tawg mus rau hauv cov ntaub so ntswg los ntawm kev siv tshuab lossis tshuaj.

Thaum tau txais cov ntaub so ntswg, nws tau ua tiav ntxiv kom tshem tawm cov impurities xws li lignin thiab hemicellulose, uas tuaj yeem ua rau daim ntawv tsis muaj zog thiab ua rau tsis muaj xim. Cov tshuaj dawb kuj tseem siv tau los ua kom cov tawv nqaij dawb thiab txhim kho nws qhov ci. Tom qab purification, lub pulp yog tov nrog dej los ua ib tug slurry, uas yog ces kis mus rau ib tug hlau mesh screen kom ntws dej ntau dhau thiab tsim ib tug nyias lev ntawm fibers. Cov lev no yog tom qab ntawd nias thiab qhuav los ua daim ntawv.

Cellulose yog qhov tseem ceeb rau cov txheej txheem papermaking vim nws cov khoom tshwj xeeb. Nws muab lub zog thiab ruaj khov rau daim ntawv thaum tseem cia nws hloov tau yooj yim thiab hnav. Tsis tas li ntawd, cellulose fibers muaj kev sib raug zoo rau cov dej, uas yuav pab tau cov ntawv nqus cov cwj mem thiab lwm yam kua dej tsis muaj kev sib cais.

Thaumcelluloseyog lub hauv paus tseem ceeb ntawm daim ntawv, lwm yam khoom siv ntxiv tuaj yeem muab tso rau hauv cov txheej txheem papermaking los txhim kho cov khoom tshwj xeeb. Piv txwv li, fillers xws li av nplaum los yog calcium carbonate yuav raug ntxiv los txhim kho opacity thiab smoothness, thaum sizing cov neeg ua hauj lwm xws li hmoov txhuv nplej siab los yog tshuaj hluavtaws tej zaum yuav raug siv los tswj cov ntawv absorbency thiab txhim kho nws tsis kam mus rau dej thiab number case.