ECF elemental chlorine-free bleaching process for nsungwi minofu

Tili ndi mbiri yakale yopanga mapepala ansungwi ku China. Bamboo fiber morphology ndi kapangidwe ka mankhwala ndizopadera. Wapakati CHIKWANGWANI kutalika ndi yaitali, ndi CHIKWANGWANI cell khoma microstructure ndi wapadera. Kukula kwamphamvu panthawi yopukutira ndikwabwino, kumapereka mawonekedwe owoneka bwino amtundu wowoneka bwino komanso wobalalika wopepuka. The lignin zili nsungwi zopangira (pafupifupi 23% -32%) ndi mkulu, amene amatsimikizira mkulu alkali kuchuluka ndi sulfidation digiri pa pulping ndi kuphika (digiri sulfidation zambiri 20% -25%), amene ali pafupi coniferous nkhuni. . Kuchuluka kwa hemicellulose ndi silicon zomwe zili muzopangirazi kumabweretsanso zovuta zina pakugwira ntchito kwanthawi zonse kwa zotsukira zamkati ndi kutuluka kwa mowa wakuda ndi makina owerengera. Ngakhale izi, nsungwi zopangira akadali zabwino zopangira mapepala.

Dongosolo la bleaching la zomera zazikulu ndi zazing'ono zopangidwa ndi nsungwi zimatengera njira yoyeretsera TCF kapena ECF. Nthawi zambiri, kuphatikizika kwakuya komanso kuwongolera mpweya wa pulping, ukadaulo wa TCF kapena ECF bleaching umagwiritsidwa ntchito. Kutengera kuchuluka kwa magawo owulitsidwa, nsungwi zamkati zimatha kuwulitsidwa mpaka 88% -90% kuwala.

Minofu yathu yowukitsidwa ya nsungwi zonse ndi bleach ndi ECF (elemental chlorine free), yomwe imataya pang'ono bleaching pa nsungwi zamkati ndi kukhuthala kwamphamvu kwa zamkati, zomwe zimafika kupitirira 800ml/g. Minofu ya nsungwi ya ECF imakhala ndi zamkati yabwinoko, imagwiritsa ntchito mankhwala ochepa, ndipo imakhala ndi bleaching kwambiri. Panthawi imodzimodziyo, makina opangira zida ndi okhwima ndipo ntchito yogwiritsira ntchito imakhala yokhazikika.

Masitepe a ECF elemental chlorine-free bleaching of nsungwi tissues ndi: choyamba, mpweya (02) umalowetsedwa mu nsanja ya oxidation kuti oxidative delignification, kenako D0 bleaching-washing-Eop m'zigawo-kutsuka-D1 kutsuka-kutsuka kumachitika. motsatana pambuyo pochapa. Mankhwala akuluakulu a bleaching agents ndi CI02 (chlorine dioxide), NaOH (sodium hydroxide), H202 (hydrogen peroxide), ndi zina zotero. Kuyera kwa minofu ya nsungwi yowukidwa kumatha kufika kupitirira 80%.