Pepala la Kraft limapangidwa kudzera munjira yavulcanization, yomwe imatsimikizira kuti pepala la kraft ndiloyenera kuti ligwiritsidwe ntchito. Chifukwa cha kuchuluka kwa miyezo yakuphwanya kulimba, kung'ambika, ndi kulimba kwamphamvu, komanso kufunikira kochepetsera kuuma komanso kulimba kwambiri, pepala lapamwamba kwambiri la kraft lili ndi zofunika kwambiri pamtundu, mawonekedwe, kusasinthika, komanso kukongola.
Kuti mukwaniritse mtundu ndi kukongola, zamkati zimayenera kuyeretsedwa kuti ziwala pakati pa 24% ndi 34% ndikusunga zachikasu ndi zofiira zamtundu wake mosasinthasintha, mwachitsanzo, kusunga kulimba kwa zamkati zoyera.
Njira yopanga mapepala a Kraft
Kupanga mapepala a kraft kumaphatikizapo magawo otsatirawa.
1. Mapangidwe a zipangizo
Njira iliyonse yopangira mapepala ndi yofanana, yosiyana ndi khalidwe, makulidwe, ndi kuwonjezera kwa makhalidwe owonjezera. Pepala la Kraft limapangidwa kuchokera ku matabwa amtundu wautali, ndipo limakhala ndi mtengo wapamwamba wa katundu. Njirayi imabweretsa kuphatikizika kwa nkhuni zofewa ndi zamkati zolimba zomwe zimakwaniritsa miyezo yaukadaulo yamapepala a premium kraft. Zipatso zamatabwa za Broadleaf zimapanga pafupifupi 30% yazopanga zonse. Chiŵerengero chazinthu zopangira izi sichimakhudza mphamvu ya thupi la pepala, koma zimakhudza kwambiri gloss ndi zina.
2. Kuphika ndi kuyeretsa
Kraft zamkati ziyenera kukhala ndi mitolo yocheperako ya ulusi komanso mtundu wokhazikika, komanso kukwaniritsa zofunikira pakuphika kwapamwamba komanso kuyeretsa. Ambiri amavomereza kuti kuphika ndi kuthirira bwino kumasiyanasiyana pakati pa zitsanzo zamatabwa. Ngati mzere wa zamkati ukhoza kulekanitsa nkhuni zofewa ndi zolimba, kuphika nkhuni zofewa ndi zolimba komanso kupukuta zikhoza kusankhidwa. Gawoli limagwiritsa ntchito kuphika kwa coniferous ndi matabwa olimba, komanso kuthira madzi mukamaphika. Popanga, zolakwika zamakhalidwe monga mitolo yosagwirizana ndi ulusi, mitolo yolimba ya ulusi, ndi mtundu wosakhazikika wa zamkati ndizofala.
3.Kukanikiza
Kupititsa patsogolo njira yopukutira ndi gawo lofunikira pakukulitsa kulimba kwa pepala la kraft. Nthawi zambiri, kukulitsa kupsinjika kwa zamkati ndikusunga porosity yake yabwino komanso kuuma pang'ono ndikofunikira kuti pepala likhale lolimba, kachulukidwe, komanso kufanana.
Pepala la Kraft lili ndi mphamvu zazikulu komanso zolakwika zowerengeka pakupatuka koyimirira komanso kotsatira. Zotsatira zake, zamkati zofananira ndi m'lifupi mwa mapepala, zotchingira ma skrini, ndi mawebusayiti amagwiritsidwa ntchito kukweza magiredi. Njira yopondereza yomwe imagwiritsidwa ntchito popanga pepala imakhudza mpweya wake, kuuma, ndi kusalala kwake. Kupondereza kumachepetsa porosity ya pepala, kutsitsa permeability ndi vacuum pamene kuonjezera sealability; Zingathenso kuwonjezera mphamvu yakuthupi ya pepala.
Izi ndi njira zomwe pepala la kraft nthawi zambiri limapangidwira.
Nthawi yotumiza: Nov-30-2022