Kev npaj raw khoom
Lub ntsiab raw khoom rau ntim ntawv yog pulp, muab tau los ntawm ntoo, pov tseg ntawv, los yog lwm yam ntaub ntawv fibrous. Ua ntej tsim khoom, cov khoom siv raw yuav tsum tau kuaj xyuas thiab cais tawm kom ntseeg tau tias lawv zoo thiab tsim nyog. Rau ntoo pulp, pretreatment txheej txheem xws li ua noj thiab tshuaj dawb yog feem ntau yuav tsum tau tshem tawm impurities thiab txhim kho pulp purity. Cov ntaub ntawv pov tseg yuav tsum tau deinking thiab tshuaj ntsuam kom rov qab siv tau cov fibers.
Kev npaj Pulp
Kev npaj pulp yog ib kauj ruam tseem ceeb hauv kev ntim cov ntawv ntim khoom. Cov txheej txheem no suav nrog kev sib xyaw cov tawv nqaij nrog dej, muab tshuaj, tshuaj zawv plaub hau, thiab lwm yam khoom siv los tsim kom muaj kev sib txuam sib luag. Qhov sib ntxiv ntawm cov fillers txhim kho daim ntawv gloss, smoothness, thiab opacity; qhov sib ntxiv ntawm dyes kho cov ntawv xim raws li xav tau. Kev tswj hwm nruj ntawm cov tsis xws li pulp concentration, pH tus nqi, thiab qhov kub thiab txias yog qhov tsim nyog thaum lub sij hawm npaj ua kom cov pulp zoo thiab ruaj khov.
Daim Ntawv Tshuab Sib Sau
Paper tshuab txoj kev yog cov txheej txheem ntawm kev hloov cov pulp ncua kev kawm ntawv rau hauv ntawv. Nyob rau ntawm daim ntawv tshuab, lub pulp ncua kev kawm ntawv yog sib npaug zos rau cov hlau seem los ntawm lub headbox, tsim ib tug ntub daim ntawv web. Raws li cov hlau seem txav mus, cov dej noo hauv cov ntawv ntub dej yog maj mam lim tawm, thiab cov fibers intertwine los tsim cov ntawv yooj yim. Thaum lub sij hawm tus txheej txheem no, tsis xws li hlau ceev, siab, thiab nqus tsev vacuum theem yuav tsum tau tswj xyuas kom cov ntawv thickness, uniformity, thiab lub zog.
Nias thiab ziab
Tom qab tawm hauv seem xaim, daim ntawv ntub dej nkag mus rau ntu xovxwm kom lub cev qhuav dej ntxiv. Cov xovxwm feem ntau muaj ntau yam xovxwm rollers uas siv cov tshuab ua kom lub zog los nyem tawm cov dej noo los ntawm cov ntawv ntub dej. Tom qab ntawd, cov ntaub ntawv ntub dej nkag mus rau qhov chaw ziab kom qhuav. Lub tshuab ziab khaub ncaws feem ntau yog siv cov cua kub los yog cov cua sov kom evaporate cov dej noo los ntawm cov ntaub ntawv ntub dej, ua tiav qhov xav tau qhuav. Thaum lub sij hawm tus txheej txheem no, tsis xws li xovxwm siab thiab ziab kub yuav tsum tau tswj kom tsis txhob deformation ntawm daim ntawv los yog tawg.
Kev kho deg thiab ua tiav
Daim ntawv qhuav yuav xav tau kev kho saum npoo los yog ua kom tiav kom tau raws li kev siv tshwj xeeb. Piv txwv li, txheej txheem txheej thiab calendering tuaj yeem txhim kho daim ntawv gloss thiab smoothness; cov txheej txheem luam ntawv thiab lamination tuaj yeem ntxiv cov qauv, ntawv nyeem, lossis tiv thaiv - cov yam ntxwv cuav. Cov kauj ruam ua haujlwm no tuaj yeem txhim kho daim ntawv ua tau zoo thiab zoo nkauj, txhim kho nws txoj kev lag luam kev sib tw. VI. Kev soj ntsuam zoo thiab ntim khoom
Nyob rau theem kawg ntawm cov txheej txheem tsim khoom, cov ntawv ntim yuav tsum tau kuaj xyuas kom zoo. Qhov no suav nrog kev tshuaj xyuas seb daim ntawv thickness, zoo ib yam, lub zog, gloss, thiab lwm yam kev ntsuas ua tau raws li tus qauv yuav tsum tau ua. Tsuas yog daim ntawv uas dhau qhov kev tshuaj ntsuam xyuas zoo tuaj yeem suav tias tsim nyog thiab txuas ntxiv nrog kev ntim khoom thiab khaws cia. Kev ntim khoom feem ntau yog ua nyob rau hauv yob los yog ntawv kom yooj yim ntawm kev thauj thiab siv.
