Kev Ua Haujlwm Sib Txawv ntawm Xyoob Ntawv Pulp

Raws li qhov sib txawv ntawm kev ua tiav, xyoob ntawv pulp tuaj yeem muab faib ua ntau pawg, feem ntau suav nrog Unbleached Pulp, Semi-bleached Pulp, Bleached Pulp thiab Refined Pulp, thiab lwm yam. Unbleached Pulp kuj tseem hu ua unbleached pulp.

1. Cov tawv nqaij tsis tau dawb

Cov ntawv xyoob tsis tau dawb, tseem hu ua cov ntawv tsis tau dawb, hais txog cov ntawv tau los ntawm xyoob lossis lwm cov khoom siv fiber ntau tom qab kho ua ntej los ntawm kev siv tshuaj lom neeg lossis tshuab, yam tsis muaj kev dawb. Hom ntawv no khaws cov xim ntuj ntawm cov khoom siv raw, feem ntau yog los ntawm daj daj mus rau xim av tsaus, thiab muaj cov lignin thiab lwm yam khoom tsis yog cellulose ntau. Tus nqi tsim khoom ntawm cov ntawv xim ntuj yog qis heev, thiab nws siv dav hauv cov teb uas tsis xav tau cov ntawv dawb siab, xws li ntawv ntim khoom, ntawv cardboard, ib feem ntawm daim ntawv kab lis kev cai thiab lwm yam. Nws qhov zoo yog los tswj cov yam ntxwv ntuj ntawm cov khoom siv raw, uas yog qhov zoo rau kev siv cov peev txheej ruaj khov.

2. Cov ntaub pua plag uas tau bleached ib nrab

Cov ntawv xyoob semi-bleached yog ib hom pulp ntawm cov pulp ntuj thiab cov pulp bleached. Nws dhau los ntawm ib feem ntawm cov txheej txheem bleaching, tab sis qib ntawm bleaching tsis yog tag nrho li cov bleached pulp, yog li xim yog nruab nrab ntawm cov xim ntuj thiab dawb huv, thiab tseem muaj qee qhov xim daj. Los ntawm kev tswj cov tshuaj bleach thiab lub sijhawm bleaching thaum lub sijhawm tsim cov semi-bleached pulp, nws muaj peev xwm ua kom ntseeg tau qee qib ntawm kev dawb thaum tib lub sijhawm txo cov nqi tsim khoom thiab kev cuam tshuam rau ib puag ncig. Hom pulp no yog tsim rau cov sijhawm uas muaj qee qhov yuav tsum tau ua rau ntawv dawb tab sis tsis txhob dawb dhau, xws li qee hom ntawv sau, ntawv luam ntawv, thiab lwm yam.

3. Cov ntaub dawb

Cov ntawv xyoob bleached yog cov ntawv bleached tag nrho, nws cov xim yog ze li dawb huv, siab whiteness index. Cov txheej txheem bleaching feem ntau siv cov txheej txheem tshuaj lom neeg, xws li kev siv chlorine, hypochlorite, chlorine dioxide lossis hydrogen peroxide thiab lwm yam tshuaj bleaching, txhawm rau tshem tawm lignin thiab lwm yam xim hauv cov ntawv. Cov ntawv bleached muaj cov fiber purity siab, cov khoom zoo lub cev thiab tshuaj lom neeg ruaj khov, thiab yog cov khoom siv tseem ceeb rau cov ntawv kab lis kev cai qib siab, ntawv tshwj xeeb thiab ntawv hauv tsev. Vim nws cov dawb siab thiab kev ua haujlwm zoo heev, cov ntawv bleached nyob hauv txoj haujlwm tseem ceeb hauv kev lag luam ntawv.

4. Cov ntawv ua los ntawm cov ntawv zoo

Feem ntau, cov pulp uas tau los ntawm cov pulp uas tau bleached lawm, thiab tom qab ntawd kho los ntawm cov txheej txheem tshuaj lom neeg los yog lub cev kom ua kom cov pulp huv thiab cov fiber ntau dua. Cov txheej txheem no suav nrog kev sib tsoo zoo, kev tshuaj ntsuam thiab kev ntxuav, uas yog tsim los tshem tawm cov fiber ntau, cov khoom tsis huv thiab cov tshuaj tsis ua haujlwm ntawm cov pulp thiab ua rau cov fiber ntau dua thiab mos dua, ua rau daim ntawv du thiab ci dua. Cov pulp uas tau ua kom zoo yog qhov tsim nyog rau kev tsim cov ntawv muaj nqis ntxiv, xws li ntawv luam ntawv zoo, ntawv kos duab, ntawv coated, thiab lwm yam, uas muaj qhov yuav tsum tau ua kom zoo, sib xws thiab hloov pauv tau.