Iphepha le-Kraft lenziwa ngenqubo ye-vulcanization, eqinisekisa ukuthi iphepha le-kraft lifaneleka ngokuphelele ukusetshenziswa okuhlosiwe. Ngenxa yamazinga anyukile okwephula ukuqina, ukudabuka, namandla okuqina, kanye nesidingo sokuncipha kokuqina kanye ne-porosity ephezulu kakhulu, ikhwalithi ephezulu kakhulu ye-kraft paper inezidingo eziphakeme zombala, ukuthungwa, ukungaguquguquki, kanye nenani lobuhle.
Ukuze kuhlangatshezwane namazinga ekhwalithi yombala kanye nekhwalithi yobuhle, i-pulp kufanele yenziwe mhlophe ukuze ifinyelele ukukhanya okuphakathi kuka-24% no-34% kuyilapho igcina amanani e-pulp ephuzi nokubomvu engashintshi, okungukuthi ukugcina ukuqina kwe-pulp emhlophe.
Inqubo yokukhiqiza iphepha le-Kraft
Inqubo yokukhiqiza iphepha le-kraft ihlanganisa izigaba ezilandelayo.
1. Ukwakheka kwezinto ezingavuthiwe
Noma yiluphi uhlobo lwenqubo yokwenza iphepha luyefana, luhluke kuphela ngekhwalithi, ukujiya, kanye nokwengezwa kwezici ezengeziwe. Iphepha le-Kraft lenziwe ngokhuni olude lwe-fiber, futhi linesilinganiso esiphezulu sempahla. Inqubo ikhiqiza inhlanganisela yokhuni oluthambile kanye nokhuni oluqinile oluhlangabezana nezindinganiso zekhwalithi yobuchwepheshe yephepha le-kraft le-premium. I-broadleaf wood pulp yenza cishe u-30% womkhiqizo usuwonke. Lesi silinganiso sempahla eluhlaza asinawo umthelela emandleni angokomzimba wephepha, kodwa sinomthelela omkhulu ekucwebezeleni nakwezinye izindlela.
2. Ukupheka nokuhlanza
I-Kraft pulp kufanele ibe nezinyanda ezimbalwa zefiber emahhadla nombala ongaguquki, futhi ihlangabezane nezidingo zekhwalithi ephezulu yokupheka nezinqubo zokufiphalisa. Kuyamukelwa kabanzi ukuthi ukupheka nokusebenza kahle kwe-bleaching kuyehluka kakhulu phakathi kwamasampula okhuni. Uma umugqa we-pulp ungahlukanisa i-softwood ne-hardwood pulping, ukupheka okuthambile nokhuni oluqinile kungakhethwa. Lesi sigaba sisebenzisa ukupheka okuhlanganisiwe kwe-coniferous kanye nokhuni oluqinile, kanye nokuxubha okuhlanganisiwe ngemva kokupheka. Enqubweni yokukhiqiza, ukukhubazeka kwekhwalithi okufana nezinqwaba zefiber ezingahambisani, izinyanda zefiber emahhadla, nombala we-pulp ongazinzile kuvamile.
3.Ukucindezela
Ukuthuthukisa inqubo ye-pulping kuyisinyathelo esibalulekile ekwandiseni ukuqina kwephepha le-kraft. Ngokuvamile, ukwandisa ukucindezelwa kwe-pulp ngenkathi kugcinwa i-porosity yayo enhle nokuqina okuphansi kuyadingeka ukuze kuthuthukiswe ukuqina kwephepha, ukuminyana, nokufana.
Iphepha le-Kraft linamandla amakhulu kanye namaphutha angenakulinganiswa ekuphambukeni okuqondile nokusemaceleni. Njengomphumela, izilinganiso ezifanele ze-pulp nobubanzi bephepha, izihlungi zesikrini, nama-webforms asetshenziselwa ukuthuthukisa amabanga. Indlela yokucindezela esetshenziswa ekwenzeni iphepha ithinta ukungena komoya walo, ukuqina, nokushelela. Ukucindezela kunciphisa i-porosity yeshidi, kwehlisa ukungena kwalo kanye ne-vacuum ngenkathi kwandisa ukuvala; kungase futhi ukwandisa amandla ngokomzimba wephepha.
Lezi zindlela i-kraft paper ngokuvamile eyenziwa ngayo.
Isikhathi sokuthumela: Nov-30-2022