Iphepha le-Kraft lenziwa ngenkqubo ye-vulcanization, eqinisekisa ukuba iphepha le-kraft lifanelekile ngokupheleleyo ekusetyenzisweni kwalo. Ngenxa yemigangatho eyonyukileyo yokwaphula ukuqina, ukukrazula, kunye namandla okutsalwa, kunye nesidingo sokuncipha kokuqina kunye nokuvuleka okuphezulu kakhulu, iphepha le-kraft elisemgangathweni ophezulu lineemfuno eziphezulu zombala, ubume, ukuhambelana, kunye nexabiso lobuhle.
Ukuze kuhlangatyezwane nemigangatho yombala kunye nobuhle, i-pulp kufuneka i-bleached ukuze ifumane ukukhanya okuphakathi kwe-24% kunye ne-34% ngelixa igcina amaxabiso e-pulp etyheli nebomvu engaguqukiyo, oko kukuthi igcina ukuqina kwe-pulp emhlophe.
Inkqubo yokwenziwa kwephepha lobugcisa
Inkqubo yokwenziwa kwephepha le-kraft ibandakanya la manqanaba alandelayo.
1. Ukwakhiwa kwezinto ezikrwada
Naluphi na uhlobo lwenkqubo yokwenza iphepha lufana, lwahlukile kuphela ngomgangatho, ubukhulu, kunye nokongezwa kweempawu ezongezelelweyo. Iphepha le-Kraft lenziwe nge-pulp yomthi ende enefayibha, kwaye linomgangatho ophezulu wepropathi ebonakalayo. Le nkqubo ivelisa umxube we-softwood kunye ne-hardwood pulp ehlangabezana nemigangatho yomgangatho wobugcisa wephepha le-kraft eliphambili. I-pulp yomthi we-Broadleaf ibandakanya malunga ne-30% yemveliso iyonke. Olu linganiselo lwezinto eziluhlaza alunampembelelo kumandla ephepha, kodwa lunempembelelo ebalulekileyo kwi-gloss nakwezinye iindlela.
2. Ukupheka kunye nokuyifaka ibala
I-Kraft pulp kufuneka ibe neebhanti zefayibha ezirhabaxa ezimbalwa kunye nombala ohambelanayo, kunye nokuhlangabezana neemfuno zeenkqubo zokupheka kunye nokubhrasha ezisemgangathweni ophezulu. Kuyamkelwa ngokubanzi ukuba ukusebenza kakuhle kokupheka kunye nokubhrasha kwahluka kakhulu phakathi kweesampuli zomthi. Ukuba umgca we-pulp ungahlula i-softwood kunye ne-hardwood pulping, ukupheka kunye nokubhrasha komthi orhabaxa kunokukhethwa. Eli nqanaba lisebenzisa ukupheka okudibeneyo kwe-coniferous kunye ne-hardwood nut, kunye nokubhrasha okudibeneyo emva kokupheka. Kwinkqubo yokuvelisa, iziphene zomgangatho ezifana neebhanti zefayibha ezingahambelaniyo, iibhanti zefayibha ezirhabaxa, kunye nombala we-pulp ongaguqukiyo ziqhelekile.
3. Ukucinezela
Ukuphucula inkqubo yokukhupha iphepha le-kraft linyathelo elibalulekileyo ekwandiseni ukuqina kwephepha le-kraft. Ngokubanzi, ukunyusa ucinezelo lwe-pulp ngelixa igcina imingxunya yayo emihle kunye nokuqina okuncinci kuyimfuneko ukuphucula ukuqina kwephepha, uxinano, kunye nokufana.
Iphepha le-Kraft linamandla amakhulu kunye neempazamo ezinokubalwa xa lithe nkqo naxa lisecaleni. Ngenxa yoko, kusetyenziswa umlinganiselo ofanelekileyo wobubanzi be-pulp ukuya kwiphepha, ii-screen shakers, kunye nee-web formers ukuphucula amanqaku. Indlela yokucinezela esetyenziselwa ukwenza iphepha ichaphazela ukungena komoya, ukuqina, kunye nokuguda. Ukucinezela kunciphisa ukuvuleka kwephepha, kunciphisa ukungena kwalo kunye ne-vacuum ngelixa kwandisa ukutywinwa; kunokunyusa namandla ephepha.
Ezi zezona ndlela kudla ngokwenziwa ngazo iphepha le-kraft.
Ixesha lokuthumela: Novemba-30-2022