Iyini Umthelela Wekhwalithi YePulp Ekuqiniseni KweGlassine?
Kwadalwa ngo 11.12
Umthelela wekhwalithi ye-pulp emandleni e-glassine ubalulekile futhi unjengokujulile.
Ngamafuphi, ikhwalithi ephezulu ye-pulp iyisidingo esiyinhloko sokufeza amandla aphezulu e-glassine. Awukwazi ukwenza i-glassine eqinile usebenzisa i-pulp engalungile.
Nansi incazelo eningiliziwe yokuthi kungani lokhu kwenzeka, kubandakanya izici ezisemqoka ze-pulp nokuthi ziguqulela kanjani emandleni okugcina ephepheni le-glassine.
Iyini iGlassine futhi kungani amandla ebalulekile?
Okokuqala, ake sichaze i-glassine. I-glassine iphepha elithambile, elikhanyayo, nelinzima elingaphumeleli emoyeni, amafutha, kanye nomswakama. Izici zayo ezihlukile zivela enhlanganweni ebizwa ngokuthi i-supercalendering, lapho iphepha liphonswa phakathi kwezinsimbi ezishisayo, ezikhanyayo. Le nqubo iyawuqeda umumo wephepha, icindezela amafibre ndawonye kakhulu futhi idala indawo evaliwe kakhulu.
Amandla abalulekile ku-glassine ngoba:
- Kufanele ikwazi ukumelana nengcindezi enkulu yenqubo yokuphakanyiswa ngaphandle kokuphuka.
- Idinga amandla aphezulu ngaphakathi (z-direction) ukuvimbela ukuhluza.
- Ithanda amandla amahle okudonsa nokuphuka ukuze kube nokuguqulwa okusheshayo (isb., ukujolisa, ukusika) kumishini yokupakisha.
- Ukusetshenziswa kokugcina (isb., ukupakisha izipho, ukupakisha ukudla, i-adhesive tape backing) kuvame ukufuna ukuqina.
Izici Eziyinhloko Zekhwalithi YePulp Nezithonya Zazo Ekuqiniseni Kwegilasi
Amandla anye iphepha, kuhlanganise ne-glassine, atholakala ekuxhumaneni kwe-hydrogen phakathi kwezintambo ze-cellulose ezihlukene. Ikhwalithi ye-pulp inquma amandla okwakha lezi zixhumanisi eziqinile, eziningi.
1. Ukuhlanzeka kwePulp (Ukungabi khona kokungcoliswa)
- Impact: Okukhulu kakhulu. Lokhu kungenzeka kube yinto ebaluleke kakhulu.
- Incazelo: I-Glassine yenziwe ukuba ibe ne-translucent futhi ibhaki. Izinto ezingcolile ezifana ne-lignin, i-hemicellulose, kanye ne-ink esele evela kuma-fiber aphindwe kabili zisebenza njengomgoqo wezinto, zivimbela ama-fiber e-cellulose ekufinyeleleni eduze ukuze akhe izixhumi eziqinile ze-hydrogen.
- Lignin: Yenza amafibre abe qinile futhi abe ne-brittle, yehlisa ukujikeleza nokuxhumana.
- Hemicellulose: Ngenkathi ingasiza ekubondeni ngezinga elincane, kakhulu kakhulu kwenza i-pulp ibe hygroscopic (ukwamukela amanzi), okungase kwehlise amandla wesikhumba futhi kwehlise ukumelana kwayo nokunamathela.
- Izinto zokugcwalisa/Umhlabathi: Izinto zokugcwalisa ezinjenge-clay noma i-calcium carbonate azikhi bonds. Ukubakhona kwazo kunciphisa inethiwekhi ye-fiber, kudala izindawo ezibuthakathaka.
- Umphumela weGlassine: I-Pulps ye-Chemical ehlanzekile kakhulu (efana neKraft noma iSulfite) ibalulekile. Zine-lignin ephansi kakhulu kanye nomthamo wezinto ezingcolile, okuvumela ukuhlanganiswa okuphezulu kwefibre-to-fibre. I-pulp engcolile ikhiqiza iphepha elibuthakathaka, elingacacile elithambekele ekuphukeni ngesikhathi sokuhlanza noma ngesikhathi sokusetshenziswa.
2. Ubude beFayibha kanye namandla
- Impact: High.
- Incazelo: Amafayibha ngamunye asebenza njenge "rebar" eqinisa ematrix yephaphe.
- Izinhlaka Eziwude (isb. ezivela ezihlahleni ezithambile ezifana ne-pine): Zihlinzeka ngokuqina okuhle kakhulu kokuphuka kanye nokuphakama. Zenza inethiwekhi ebanzi, ehlangene kakhulu eyabelana ngengcindezi kahle.
- Amaphiko Aqinile: Amandla angaphakathi odonga lwefayibha uqobo (alungiswa ngezimpawu ezifana ne-Zero-Span Tensile) akhuthaza ngqo amandla aphelele ephepheni.
- Umphumela weGlassine: Iphrotheni ephezulu ye-fibers ezinde, eziqinile ze-softwood ivamise ukusetshenziswa ukuhlinzeka ngamandla edolobha adingekayo ukuze kuhlangatshezwane nezimo zokuphila ze-supercalendering nezokusetshenziswa. Ngaphandle kwazo, i-glassine izoba namandla amancane futhi kulula ukuyinqamula.
3. Izinga Lokuhlukanisa (Fibrillation)
- Impact: Critical and Direct.
- Incazelo: Ukuhlanzwa kuyindlela yokwelapha imishini ye-pulp ethuthukisa ubuso be-fiber, okubangela "ukuhlukana" - ukususa amafibrils amancane. Lokhu kukhuphula kakhulu indawo yokusebenza yamafiber.
- I-Surface Area Engeziwe = Izindawo Ezinamandla Zokubopha Ezingaphezulu.
- I-pulp ehlanzekile ivumela amafayibha ukuthi aphumelele futhi ahlangane ngokuqinile ngesikhathi sokwakhiwa kwephepha nokuhlanza okuphezulu, kudala isakhiwo esiqinile, esingenamikhondo.
- Umphumela we-Glassine: Ukuhlanzwa okujulile kuyisici esiyinhloko sokukhiqizwa kwe-glassine. I-pulp yekhwalithi ephezulu kumele ibe nekhono lokuhlanzwa kakhulu ngaphandle kokusika amafibre (okuzokwenza kube buthaka). Lokhu kuhlanzwa okukhulu kuyinto edala iphepha eliqinile, eliqinile, nelicacile elihambisana ne-glassine. I-pulp engahlanzwanga kahle izoholela ephepheni elibuthakathaka, elingacacile, nelinokungena.
4. Ukuhambisana Nokuhlangana
- Impact: High.
- Incazelo: Inqubo yokwenziwa kwephepha idinga impahla yokudla ehambisanayo. Ukwehluka kwekhwalithi ye-pulp kuholela ezindaweni ezithambile (noma "imigqa eyinqaba") ephepheni lokugcina.
- Umphumela we-Glassine: I-pulp engahambisani ingabangela ukuwa kwe-web ngesikhathi senqubo yokuphakamisa ye-supercalendering enezinga eliphezulu. Ikhwalithi ye-pulp efanayo iqinisekisa ukusatshalaliswa okufanayo kwamandla kuyo yonke iphepha, okubalulekile ekusebenzeni emigqeni yokupakisha esheshayo.
Isifinyezo: Umphumela Nokubangela
Ikhwalithi yePulp Iphawu | Umthelela kuMandla weGlassine |
High Purity (Low Lignin) | +++ Ivumela ukuxhumana kwe-hydrogen okuphezulu, okuholela ekwakheni amandla aphezulu okudonsa kanye namandla angaphakathi. |
Ithambo Elide, Elinamandla | +++ Iphakela isisekelo esakhiwe sokuphila okuphezulu kokuphuka nokudonsa. |
High Refining Potential | +++ Dala indawo enkulu yokuxhumana, eholela ekutheni kube nokucindezela okukhulu kanye namandla aphezulu okudonsa. |
High Consistency | ++ Ivimbela izindawo eziphukile futhi iqinisekisa amandla alinganayo phezu kwephepha, ivimbela ukuwa. |
Isiphetho
Cabanga ngalendlela: Inqubo ye-supercalendering iyona efinyelela amandla okuphuma kwepulp, kodwa ikhwalithi ye-pulp uqobo ichaza lelo thuba.
Ungakwazi ukufaka iphalethi enezinga eliphansi, engcolile, noma engahlanjwa kahle ekwenzeni i-supercalendering, kodwa umphumela uzoba iphepha elibuthakathaka, elithambile, noma elingaphukile kalula. Le nqubo ayikwazi ukudala amandla angakaze akhiwe ngaphakathi kwenethiwekhi ye-fiber.
Ngakho-ke, ukuze kukhiqizwe i-glassine enamandla aphezulu, abakhiqizi kumele baqale ngepulp ye-chemical enobukhulu obuphezulu, enezinhlaka ezinde ezihlanjululwe kahle futhi ngokucophelela. Azikho izindlela ezisheshayo; ikhwalithi ye-pulp iyisici esiyinhloko esinqumayo amandla ephepha le-glassine lokugcina.
Ferrill
Evelyn
Suzy
Ray