Nkhani

Ndi kukhazikitsidwa kwa "kuletsa pulasitiki" komanso kupititsa patsogolo chidziwitso cha aliyense pachitetezo cha chilengedwe, kugwiritsa ntchito matumba apulasitiki kwachepetsedwa kwambiri, ndipo aliyense wayamba kugwiritsa ntchito matumba oteteza zachilengedwe kapena zikwama zamapepala.Monga tonse tikudziwa, pepala ndi chida chomwe chingathe kubwezeredwa ndi kugwiritsidwanso ntchito.Zopangira zopangira mapepala zimakhala makamaka ulusi wa zomera.Kuphatikiza pa zigawo zitatu zazikulu za cellulose, hemicellulose ndi lignin, pali zigawo zina zomwe zili ndi zochepa.Monga utomoni, phulusa, etc. Tiyeni tikambirane kusiyana kwa pepala thumba pepala ndi kraft pepala.

Choyamba, kupanga mapepala a thumba la mapepala ndi mapepala a kraft ndi ofanana kwambiri.Mapepala a thumba amapangidwa pogwiritsa ntchito ulusi wamatabwa kuchokera ku softwood ndi kraft zamkati.Komabe, mtundu wa pepala lachikwama nthawi zambiri umakhala wotsika kuposa wa pepala la kraft, chifukwa, kuti apulumutse ndalama zopangira, mabizinesi ena amawonjezera zamkati za thonje, nsungwi, ndi zina zotero, ndipo nsanza zina zidzawonjezedwa kwa omwe ali ndi thonje. kusagwira bwino ntchito.Choncho, pepala thumba pepala Ubwino wa pepala si okhazikika ndipo ali kusinthasintha kwambiri.Pa nthawi yomweyo, pepala thumba pepala ali bwino mawotchi mphamvu, choncho nthawi zambiri ntchito ngati thumba ma CD, makamaka ma CD simenti, feteleza, etc. Komanso, tsopano, ma CD mankhwala ambiri amafuna mpweya permeability, kotero mpweya permeability. wa pepala thumba pepala ndi bwino ndithu.

Mitundu ya mapepala a kraft ndi yochuluka kwambiri, yomwe imatha kusiyanitsa ndi mtundu, ntchito ndi zipangizo.Kuphatikiza apo, mphamvu ya pepala la kraft ndi yayikulu, yomwe ndi imodzi mwazinthu zofunika kwambiri zomwe zimasiyanitsa ndi mapepala ena.Nthawi yomweyo, mapepala a kraft ndi amphamvu kwambiri ndipo amatha kugwiritsidwa ntchito kunyamula zinthu zambiri.Pankhani yamakalasi, pepala la kraft likhoza kugawidwa m'magulu atatu: U, A ndi B3.Kuphatikiza apo, zinthu zosiyanasiyana zimakhala ndi zofunikira zosiyanasiyana.Panthawi imodzimodziyo, khalidwe losiyana limatanthauza ndalama zosiyana, choncho makampani ayenera kusankha okha.Kuphatikiza apo, zikwama zamapepala zopangidwa ndi kraft paper nthawi zambiri zimakhala matumba ang'onoang'ono, ndipo kukula kwa pepala lachikwama sikudziwika.

Mwachidule, pempho la lamulo loletsa pulasitiki lalimbikitsa chitukuko cha mapepala a kraft, ndipo tsopano anthu akugula matumba a mapepala a kraft, omwe ndi ochezeka ndi chilengedwe ndipo angagwiritsidwe ntchito kwa nthawi yaitali, kupanga chothandizira pazithandizo ndi kuteteza chilengedwe.Chifukwa chake, kugwiritsa ntchito mapepala a kraft kumalimbikitsidwa.Zikwama zamapepala za Kraft ndizolimba, zolimba, zokongola komanso zachilengedwe.