Kev piav qhia ntxaws txog Kev ntim cov ntawv tsim khoom

1. Kev xaiv raw khoom

Kev npaj cov ntawv ntim rau cov ntawv ntim feem ntau yog siv cov nroj tsuag - cov ntaub ntawv raws li - xws li cov ntawv pov tseg, ntoo, thiab nyom- ua raw cov ntaub ntawv. Cov ntawv pov tseg yog cov khoom siv tseem ceeb rau kev tsim cov ntawv ntim khoom; nws tuaj yeem muab faib ua cov ntawv rov ua dua tshiab thiab cov ntawv pov tseg. Thaum xaiv cov khoom siv raw, qhov tseem ceeb yog muab rau cov ntawv pov tseg ntawm cov khoom zoo uas tsis muaj kev sib kis loj.

2. Pulping txheej txheem

Cov txheej txheem pulping hauv paus yog ntxiv dej rau cov khoom siv raw thiab ua rau lawv tawg - los ntawm kev siv tshuab quab yuam lossis tshuaj kho mob - mus rau hauv cov cellulose fibers ntawm ib qho me me, yog li tsim cov pulp.

Cov khoom siv pulping tuaj yeem muab faib ua ob hom: mechanical pulping thiab tshuaj pulping. Mechanical pulping yog qhov yooj yim thiab tsim nyog rau cov khoom siv raw uas muaj cov cellulose ntev fibers, xws li ntoo thiab nyom. Hloov pauv, tshuaj pulping zoo dua rau cov ntawv pov tseg, uas feem ntau muaj cov cellulose luv dua.

1. Pulp Blending

Lub pulp npaj tau muab sib xyaw rau hauv ib qho tshwj xeeb kom tau raws li cov kev xav tau sib txawv ntawm ntau yam thiab cov yam ntxwv ntawm cov ntawv ntim sib txawv. Thaum lub sij hawm blending txheej txheem, yam xws li daim ntawv lub zog, toughness, thiab glossiness yuav tsum tau muab rau hauv tus account; Tsis tas li ntawd, qhov tsim nyog ntawm cov khoom siv pabcuam- xws li cov khoom ntim thiab hloov cov neeg ua haujlwm - tau ntxiv raws li xav tau.

2. Kev ua ntaub ntawv

Cov txheej txheem papermaking feem ntau suav nrog kev ua haujlwm xws li kev tsim cov ntawv sau, cov ntawv ntub dej kom qhuav, calendering thiab smoothing, thiab txheej thiab laminating.

• Pulp Sheet Formation: Cov ntawv sib xyaw ua ke yog kis tusyees hla ib txoj hlua hlau (screen). Los ntawm ntau yam kev ua-xws li co, vibrating, thiab nias- cov ntaub ntawv fibers tau teem ib yam nkaus ntawm cov hlau los tsim cov qauv pob txha ntawm daim ntawv.
• Daim ntawv ntub dej ziab: Tom qab ua tiav ntau theem nias, daim ntawv pob txha raug xa mus rau qhov ziab kom qhuav. Ntawm no, nws dhau los ua kom qhuav thiab compression ua haujlwm, maj mam nce qhov ntom kom ua tiav qhov xav tau dryness qib thiab lub zog ntawm cov qauv.
• Calendering thiab Smoothing: Cov ntawv ntim qhuav tau dhau los ntawm lub tshuab calender kom du nws saum npoo, yog li txhim kho nws qhov zoo nkauj tag nrho.
• Txheej thiab Laminating: Qee hom ntawv ntim yuav tsum tau kho ntxiv -xws li txheej thiab laminating- hloov kho lawv cov khoom nto thiab muab cov yam ntxwv tshwj xeeb, xws li dej tsis kam thiab ya raws.

1. Txiav thiab Trimming

Daim ntawv tiav raug txiav raws li cov lus qhia tshwj xeeb; feem ntau, nws yog flattened thiab ces txiav siv precision hniav kom ua tau raws li qhov xav tau qhov dav thiab ntev.

2. Kev luam ntawv thiab kho kom zoo nkauj

Kev luam ntawv suav nrog siv ntau yam qauv thiab tsim rau ntawm daim ntawv ntim. Cov txheej txheem no ua haujlwm txhawm rau txhim kho qhov pom kev pom ntawm lub ntim thiab txhawb nqa lub hom phiaj duab.

3. Kev kho mob ntxiv

Txhawm rau txhim kho lub zog thiab ua haujlwm ntev ntawm cov ntawv ntim, cov kev kho mob ntxiv -xws li cov nplaum nplaum lossis lamination- feem ntau yuav tsum tau ua.

Thaum lub sij hawm ntim cov ntawv tsim khoom, qhov tseem ceeb yuav tsum tau muab rau cov kev coj ua zoo ib puag ncig kom txo tau cov pa phem ib puag ncig. Qhov no tuaj yeem ua tiav los ntawm kev xaiv cov khoom siv txuas ntxiv dua tshiab, txhim kho kev ua haujlwm ntau lawm, thiab ntxiv dag zog rau cov txheej txheem tswj kev pov tseg. Raws li qhov tshwm sim, yuav tsum tau saib xyuas cov txheej txheem kev ua haujlwm thiab cov cuab yeej ntsuas ntsuas kom txo tau ib puag ncig kev sib kis thiab tiv thaiv cov peev txheej pov tseg.

Los ntawm cov lus qhia ntxaws ntxaws no, peb ntseeg tias cov neeg nyeem tau nkag siab tob txog cov txheej txheem ua cov ntaub ntawv koom nrog hauv kev tsim cov ntawv ntim. Raws li niaj hnub no kev coj noj coj ua ntawm ib puag ncig, peb muab qhov tseem ceeb tshaj plaws ntawm eco-kev tsim khoom zoo, sib zog ua kom paub txog "cov ntim ntsuab" thiab tiv thaiv ib puag ncig.