Papermaking chemicals yog cov tshuaj tseem ceeb siv nyob rau hauv ntau theem ntawm kev lag luam papermaking los kho fiber ntau raw cov ntaub ntawv, pulp, thiab ntawv tiav. Lawv feem ntau muab faib ua ob pawg: tshuaj lom neeg thiab tshuaj zoo.
Hom Tshuaj:
- Sodium hydroxide thiab sodium sulfide: Qhov tseem ceeb hauv cov txheej txheem sulfate pulping, siv los hloov cov ntaub ntawv fiber ntau xws li ntoo rau hauv cov ntaub so ntswg.
- Cov kua chlorine thiab calcium hypochlorite: Feem ntau siv rau hauv cov ntaub so ntswg bleaching, tshem tawm cov xim ntawm cov tawv nqaij los ntawm cov tshuaj tiv thaiv, ua rau cov ntawv dawb.
- Rosin thiab txhuas sulfate: Siv los ua binders hauv daim ntawv sizing txheej txheem, txhim kho daim ntawv cov dej tsis kam thiab lub zog.
Cov tshuaj zoo:
Sulfuric acid: Ntxiv rau lub sijhawm ua cov kua txiv hmab txiv ntoo, nws txo cov cellulose degradation, yog li tuav cov ntawv muaj zog. Nws yog ib qho tshuaj tshwj xeeb ntxiv kom tau raws li cov kev xav tau tshwj xeeb.
Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias kev faib cov tshuaj tsis yog qhov tseeb. Qee cov tshuaj zoo yuav dhau los ua cov tshuaj niaj hnub siv rau lub sijhawm ntev, thaum cov tshuaj zoo tib yam tuaj yeem hloov kho los ua cov tshuaj zoo nrog cov khoom tshwj xeeb. Hom thiab kev siv ntawm cov tshuaj siv hauv papermaking yog ntau haiv neeg thiab dynamic. Ua ke, lawv tsim cov tshuaj hauv paus ntawm cov ntawv tsim khoom thiab ua kom muaj kev vam meej hauv kev lag luam papermaking.
