Kuzama Kosiyanasiyana kwa Nsungwi Paper Pulp

Malinga ndi kuzama kosiyanasiyana kwa ntchito yokonza, mapepala a nsungwi amatha kugawidwa m'magulu angapo, makamaka kuphatikiza Unbleached Pulp, Semi-bleached Pulp, Bleached Pulp ndi Refined Pulp, ndi zina zotero. Unbleached Pulp imadziwikanso kuti unbleached pulp.

1. Zamkati Zosathira Mabala

Pepala la nsungwi losaphimbidwa, lomwe limadziwikanso kuti pulp losaphimbidwa, limatanthauza zamkati zomwe zimapezeka mwachindunji kuchokera ku nsungwi kapena zinthu zina zopangira ulusi wa zomera pambuyo pokonza koyamba pogwiritsa ntchito mankhwala kapena makina, popanda kuyeretsa. Mtundu uwu wa zamkati umasunga mtundu wachilengedwe wa zinthu zopangira, nthawi zambiri kuyambira wachikasu wopepuka mpaka bulauni wakuda, ndipo uli ndi kuchuluka kwakukulu kwa lignin ndi zinthu zina zopanda cellulose. Mtengo wopanga zamkati wamtundu wachilengedwe ndi wotsika, ndipo umagwiritsidwa ntchito kwambiri m'minda yomwe sikufuna kuyera kwambiri kwa pepala, monga pepala lopaka, makatoni, gawo la pepala lachikhalidwe ndi zina zotero. Ubwino wake ndikusunga mawonekedwe achilengedwe a zinthu zopangira, zomwe zimathandiza kuti zinthu zigwiritsidwe ntchito bwino.

2. Zamkati Zosalala Mochepa

Pepala la nsungwi lokhala ndi bleach pang'ono ndi mtundu wa bleach pakati pa pulp yachilengedwe ndi pulp yokhala ndi bleach. Limadutsa mu njira yoyeretsa pang'ono, koma kuchuluka kwa bleach sikokwanira monga kwa pulp yokhala ndi bleach, kotero mtundu wake uli pakati pa mtundu wachilengedwe ndi woyera, ndipo ukhoza kukhalabe ndi mtundu wina wachikasu. Mwa kulamulira kuchuluka kwa bleach ndi nthawi yoyeretsa popanga pulp yokhala ndi bleach pang'ono, ndizotheka kuwonetsetsa kuti pali kuyera kwina pomwe nthawi yomweyo kuchepetsa ndalama zopangira komanso kuwononga chilengedwe. Mtundu uwu wa pulp ndi woyenera nthawi zina pomwe pali zofunikira zina zoyera pepala koma osati kuyera kwambiri, monga mitundu ina ya mapepala olembera, mapepala osindikizira, ndi zina zotero.

3. Chimbudzi Chofufumitsa

Mapepala a nsungwi opakidwa utoto ndi a bleached pulp, mtundu wake uli pafupi ndi woyera wokha, ndipo ali ndi chiŵerengero choyera kwambiri. Njira yophikira utoto nthawi zambiri imagwiritsa ntchito njira zamankhwala, monga kugwiritsa ntchito chlorine, hypochlorite, chlorine dioxide kapena hydrogen peroxide ndi zinthu zina zophikira utoto, kuti achotse lignin ndi zinthu zina zamtundu mu pulp. Mapepala a bleached ali ndi ulusi wabwino kwambiri, ali ndi makhalidwe abwino komanso amakhala olimba, ndipo ndiye chinthu chachikulu chopangira mapepala apamwamba, mapepala apadera ndi mapepala apakhomo. Chifukwa cha kuyera kwake kwakukulu komanso magwiridwe antchito abwino kwambiri, mapepala a bleached ali ndi udindo wofunikira kwambiri mumakampani opanga mapepala.

4. Pepala loyengedwa bwino

Mapuloteni Oyeretsedwa nthawi zambiri amatanthauza mapuloteni omwe amapezeka pogwiritsa ntchito mapuloteni oyeretsedwa, omwe amathandizidwanso ndi njira zakuthupi kapena zamakemikolo kuti akonze kuyera ndi makhalidwe a ulusi wa mapuloteni. Njirayi, yomwe ingaphatikizepo njira monga kupukutira bwino, kuyeretsa ndi kutsuka, idapangidwa kuti ichotse ulusi wofewa, zonyansa ndi mankhwala osagwira bwino ntchito kuchokera ku mapuloteni ndikupangitsa ulusiwo kukhala wofalikira komanso wofewa, motero kukonza kusalala, kunyezimira ndi mphamvu ya pepala. Mapuloteni oyeretsedwa ndi oyenera kwambiri popanga zinthu zamtengo wapatali zamapepala, monga mapepala osindikizira apamwamba, mapepala ojambula, mapepala okutidwa, ndi zina zotero, zomwe zimafunikira kwambiri kuti mapepala akhale ofewa, ofanana komanso osinthika.