Mitundu ndi Kagwiritsidwe ntchito ka mankhwala a pepala

Mankhwala a mapepala amatanthauza mankhwala osiyanasiyana omwe amagwiritsidwa ntchito popanga mapepala, nthawi zambiri zothandizira. Kuphatikizapo zinthu zambiri:

pulping mankhwala (monga zothandizira kuphika, deinking agents, etc.)

Zipangizo zophikira: zomwe zimagwiritsidwa ntchito kufulumizitsa kuthamanga ndi zokolola za kuphika kwa mankhwala, zomwe zimagwiritsidwa ntchito nthawi zambiri zimakhala ndi anthraquinone ndi zotumphukira za quinone, zowonjezera ndi zina zotero.

Deinking agent: Amagwiritsidwa ntchito pochotsa mapepala owonongeka ndi kubwezeretsanso, zomwe zingapangitse kuyera kwa zamkati ndikuchotsa zonyansa zosiyanasiyana monga madontho a inki, ndi zina. Zimapangidwa makamaka ndi surfactant, kuphatikiza wothandizira, bleaching agent, detergent, ndi anti-reprecipitant.

mankhwala apepala (monga zoyezera zamkati, zoyezera pamwamba, ndi zina zotero):

Pulp sizing agent: saiziing agent wowonjezera pa zamkati, kuti athe kutenga gawo la kukula, nthawi zambiri rosin saponification chingamu, kulimbitsa rosin chingamu, omwazika rosin chingamu (anionic omwazika rosin chingamu, cationic omwazikana rosin chingamu), AKD ndi ASA ndi zina zotakataka kupanga kusalowerera ndale wothandizila pa petrolegent ndi sizing.

Pamwamba saizi wothandizila: ntchito pamwamba saizi ya pepala kusintha mphamvu pamwamba pa pepala, kuchepetsa ufa, lint ndi zochitika zina, makamaka kusinthidwa wowuma, monga oxidized wowuma, wowuma acetate, crosslinked wowuma; kusinthidwa mapadi, monga carboxymethyl cellulose; ma polima opangidwa, monga polyvinyl mowa, polyacrylates, styrene maleic anhydride copolymers, emulsions sera ndi zina zotero; polima zachilengedwe, monga chitosan, gelatin ndi zina zotero.

mankhwala opangira mapepala (monga antifoam wothandizira, zokutira zothandizira)

antifoam wothandizira: ntchito pulping, papermaking, ❖ kuyanika ndi njira zina defoaming, mitundu ikuluikulu malasha manja kapena emulsified palafini, mafuta acid esters, otsika carbon alcohols, silicones, amides ndi zina zotero.

❖ kuyanika othandizira: mafuta, monga calcium stearate kubalalitsidwa; zotetezera, monga isothiazolinone, p-chloro-m-toluene; dispersing agents, monga sodium hexametaphosphate, sodium polyacrylate; zosintha mamasukidwe akayendedwe, monga CMC, alkali sungunuka kukweza sodium polyacrylate ndi zina zotero.

Cholinga chake ndi kupititsa patsogolo ubwino wa mapepala ndi kupanga bwino, kupititsa patsogolo ntchito, kuchepetsa ndalama zopangira zinthu, kuonjezera phindu lachuma ndikupanga mitundu yatsopano ya mapepala.