Izikhwama zokupakisha ze-kraft ezisekelwe ephepheni le-pulp yokhuni lonke.Ngakho umbala uhlukaniswe ngephepha elimhlophe le-kraft kanye nokuphrinta okuphuzi ephepheni le-kraft.

Ifilimu ye-PP ingasetshenziswa ephepheni ukuze ivikeleke emanzini.Isendlalelo, ukuphrinta nokwenza isikhwama ukuhlanganiswa.Izindlela zokuvula nesembozo sangemuva zihlukaniswe ngokuvala ukushisa, ukugoqa amaphepha kanye nokuhlela.

Uma kuziwa esikhwameni sokuqala sokuthenga sephepha le-kraft, sazalwa ngo-1908 eSt. Paul, Minnesota, USA.Omunye umnikazi wesitolo segilosa, u-Wald Duvena, useqalile ukubheka izindlela zokuvumela abathengi ukuthi bathenge okwengeziwe ngesikhathi esisodwa ukuze kuthuthukiswe ukuthengisa.UDuvina ukholelwa ukuthi kufanele kube isikhwama esenziwe ngaphambilini esinezindleko eziphansi futhi kulula ukusisebenzisa, futhi singathwala okungenani amaphawundi angama-75.

Ngemva kokuhlolwa okuphindaphindiwe, wavala ukuthungwa kwalesi sikhwama ephepheni le-kraft ngoba senziwe ngamaconifers anemicu yokhuni ende, futhi selashwa ngamakhemikhali e-caustic soda kanye ne-alkali sulfide ngesikhathi sokupheka, okwenza Amandla okuqala e-wood fiber ilimele kancane, ngakho-ke iphepha lokugcina elikhiqizwayo lixhunywe ngokuqinile ne-fiber, futhi iphepha liqinile futhi lingakwazi ukumelana nokushuba okukhulu nokucindezela ngaphandle kokuphuka.

Eminyakeni emine kamuva, isikhwama sokuqala sephepha se-kraft sokuthenga sazalwa.Iphansi layo linonxande futhi linomthamo omkhulu kunezikhwama zephepha ze-V-bottom zendabuko.Intambo idlula phansi nasemaceleni ukukhulisa amandla ayo okuthwala, bese kwakheka amaluphu amabili adonsayo engxenyeni engenhla yesikhwama sephepha ukuze iphakanyiswe kalula.UDuvena waqamba isikhwama sokuthenga ngegama lakhe siqu futhi wasinika ilungelo lobunikazi ngo-1915. Ngalesi sikhathi, inani lokuthengisa lonyaka lalezo zikhwama zokuthenga selidlule izigidi eziyi-100.

I-Guangdong Chuangxin Packing Group ihamba phambili embonini yezokuthutha nokupakisha amabhizinisi obuchwepheshe obuphezulu anocwaningo nentuthuko, ukukhiqiza, ukuthengisa .Kunezimpawu zokuthengisa ezifana ne-Yinuo, zhonglan, i-Huanyuan, Tu-ronson,Crratrusrtkanye namalungelo obunikazi okusungulwa angaphezu kwama-30.Kusukela yasungulwa ngo-2008, umgomo webhizinisi “ukwenza umhlaba ube nobungane ngokwengeziwe ngokwemvelo” futhi uzibophezele ekubeni umholi womhlaba wonke ekupakishweni kokuvikela imvelo—amabhizinisi aphambili emhlabeni angama-500.