Sinomlando omude wokwenza iphepha le-bamboo eShayina. I-morphology ye-bamboo fiber kanye nokwakheka kwamakhemikhali kukhethekile. Ubude obujwayelekile be-fiber bude, kanti isakhiwo se-fiber cell wall sikhethekile. Ukusebenza kokuthuthukiswa kwamandla ngesikhathi sokugaya kuhle, okunikeza i-bleached pulp izakhiwo ezinhle zokukhanya ze-opacity ephezulu kanye ne-coefficient yokusabalalisa ukukhanya. Okuqukethwe kwe-lignin kwezinto zokusetshenziswa ze-bamboo (cishe ama-23%-32%) kuphezulu, okunquma inani eliphezulu le-alkali kanye nezinga le-sulfidation ngesikhathi sokugaya nokupheka (izinga le-sulfidation ngokuvamile liyi-20%-25%), eliseduze nokhuni lwe-coniferous. Okuqukethwe okuphezulu kwe-hemicellulose kanye ne-silicon kwezinto zokusetshenziswa nakho kuletha ubunzima obuthile ekusebenzeni okuvamile kohlelo lwemishini yokuwasha i-pulp kanye nokuhwamuka kotshwala obumnyama kanye nokuhlushwa. Naphezu kwalokhu, izinto zokusetshenziswa ze-bamboo ziseyizinto zokusetshenziswa ezinhle zokwenza iphepha.
Uhlelo lokufiphaza izitshalo ezinkulu neziphakathi zamakhemikhali ezisebenzisa ubumba lwe-bamboo luzosebenzisa inqubo yokufiphaza i-TCF noma i-ECF. Ngokuvamile, kuhlanganiswe nokuhlukanisa okujulile kanye nokuhlukanisa i-oxygen ye-pulping, kusetshenziswa ubuchwepheshe bokufiphaza i-TCF noma i-ECF. Kuye ngenani lezigaba zokufiphaza, ubumba lwe-bamboo lungafiphaza kuze kube ngu-88%-90%.
Izicubu zethu ze-bamboo pulp ezi-bleached zonke zi-bleached nge-ECF (engenayo i-chlorine elemental), enokulahlekelwa okuncane koku-bleach ku-bamboo pulp kanye ne-pulp viscosity ephezulu, ngokuvamile efinyelela ngaphezu kuka-800ml/g. Izicubu ze-bamboo ezi-bleached ze-ECF zinekhwalithi engcono ye-pulp, zisebenzisa amakhemikhali amancane, futhi zisebenza kahle kakhulu eku-bleach. Ngesikhathi esifanayo, uhlelo lwemishini seluvuthiwe futhi ukusebenza kahle kokusebenza kuzinzile.
Izinyathelo zenqubo yokuhlanza izicubu ze-bamboo ezingenayo i-chlorine yilezi: okokuqala, i-oxygen (02) ifakwa embhoshongweni we-oxidation ukuze kutholakale i-oxidative, bese kukhishwa i-D0 bleaching-washing-Eop extraction-washing-D1 bleaching-washing kwenziwa ngokulandelana ngemva kokuhlanza. Ama-agent ayinhloko okuhlanza amakhemikhali yi-CI02 (chlorine dioxide), i-NaOH (i-sodium hydroxide), i-H202 (i-hydrogen peroxide), njll. Ekugcineni, i-pulp e-bleached yakhiwa ukuphelelwa amanzi emzimbeni ngengcindezi. Ubumhlophe bezicubu ze-bamboo pulp e-bleached bungafinyelela ngaphezu kwama-80%.
Isikhathi sokuthunyelwe: Agasti-22-2024
