Pepala la Kraft limapangidwa kudzera muvulcanization, zomwe zimatsimikizira 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. Mapepala a Kraft amapangidwa kuchokera ku matabwa amtundu wautali, ndipo ali ndi chiwerengero chapamwamba cha katundu. Njirayi imabweretsa kuphatikizika kwa nkhuni zofewa ndi zamkati zolimba zomwe zimakwaniritsa miyezo yaukadaulo yamapepala a premium kraft. Zamkati mwa matabwa a Broadleaf amapanga pafupifupi 30% ya zonse zomwe zimapangidwa. 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 zolakwa zazikulu komanso zokhoza kuwerengeka pakupatuka koyima komanso kozungulira. Zotsatira zake, zofananira zoyenera kutengera kukula kwa mapepala, zowongolerera, ndi mawebusayiti amagwiritsidwa ntchito kukweza magiredi. Njira yopondereza yomwe imagwiritsidwa ntchito popanga pepala imakhudza mpweya wake, kuuma kwake, ndi kusalala kwake. Kupondereza kumachepetsa porosity ya pepala, kutsitsa permeability ndi vacuum pamene kuwonjezeka sealability; Zingathenso kuwonjezera mphamvu yakuthupi ya pepala.
Izi ndi njira zomwe pepala la kraft nthawi zambiri limapangidwira.
Nthawi yotumiza: Nov-30-2022