I-CMC isebenzisa Emkhakheni Wamaphepha

Ibanga lephepha le-CMCisekelwe ku-cellulose njengento eluhlaza eyinhloko, ngemva kokwelashwa kwe-alkalization kanye ne-ultra-fine, bese kuba ngokusabela kwamakhemikhali amaningi njengokuphambana, i-etherification kanye ne-acidification eyenziwe nge-anion polymer enesakhiwo sebhondi ye-ether. Umkhiqizo wayo oqediwe uyimpushana emhlophe noma ephuzi ekhanyayo noma i-granular matter. Akunabuthi, akunambitheki, akunaphunga, nokugcinwa kahle kwamanzi, nokusheka okuhle kakhulu.

Iqhaza Eliyinhloko le-CMCI-sodium carboxymethyl cellulose embonini yamaphepha:

I-CMC isetshenziselwa ukwenza i-coated paper coating. I-Carboxymethyl cellulose ingakhuphula inani lokugcinwa komswakama we-coating ukuvimbela ukufuduka kwezinamathelisi ezincibilikisiwe emanzini ziye ephepheni, ukuze kuthuthukiswe izinga le-coating futhi kuthuthukise ikhwalithi yokunamathela.

Ngenxa yokuthi i-CMC inamathela kahle, ngakho-ke amandla okunamathela mahle kakhulu, i-carboxymethyl cellulose ingathatha indawo yesitashi esishintshiwe esingu-3-4 noma okuphuma ku-2-3 isitashi, ngasikhathi sinye inganciphisa inani le-latex, isize ukuthuthukisa okuqukethwe okuqinile kokunamathela. .

Ngesikhathi sokugqoka kungadlala umphumela wokugcoba, ukuqinisa ukuhlukaniswa kwefilimu, isilinganiso sokwenza ifilimu sihle kakhulu, singenza ifilimu eqhubekayo eqinile ibe ne-luster enhle, gwema isimo "se-orange peel". Izakhiwo zamakhemikhali ze-sodium carboxymethyl cellulose CMC ezishiwo nge-pseudoplastic, le mpahla ye-carboxymethyl cellulose ingenza i-coating ibe "ne-pseudoplastic", okuholela ekuhlanganiseni okuzacile ku-shear ephezulu, okulungele ikakhulukazi ukunamathela kokuqukethwe okuqinile okuphezulu noma ukunamathela ngesivinini esikhulu.

Ngenxa yokuthi isixazululo esinamanzi se-CMC sinokumelana ne-enzymatic hydrolysis kanye ne-metabolism ye-inert, ukugqoka kunokuzinza okuhle, okubonakaliswa ekugcineni i-homogeneity ye-coating, ukuze ukugqoka kungabi lula ukuwohloka ngesikhathi sokugcina. Okwesibili, i-CMC isetshenziswa njengokulinganisa okungaphezulu kwe-pulp yephepha. Usayizi wephepha ungakhuphula ukuqina, ubushelelezi, futhi uthuthukise ubulukhuni balo bomhlaba kanye nokungeneka.

I-CMCIngakwazi ukulawula ngempumelelo ukugoba futhi ithole ukufaneleka okuhle kokuphrinta. Ukwengeza ingxenye ethile ye-CMC ekulinganisweni kwendawo kungenza indawo engaphezulu ifinyelele ukubekwa uphawu okuhle, futhi ubuso bokuphrinta bungathuthukisa ukucaca kokuphrinta kombala futhi konge uyinki. Isixazululo samanzi se-CMC sinokwakheka kwefilimu okuhle kakhulu, ngakho-ke i-CMC ku-ejenti yokulinganisa indawo ivumela ukwakheka kwefilimu kwe-ejenti yokulinganisa ebusweni bephepha, ukuze kuthuthukiswe umphumela wokulinganisa indawo.

Kodwa-ke, ngenxa yentengo ephakeme ye-CMC, ngokuvamile isetshenziselwa iphepha elinezidingo ezikhethekile kuphela (iphepha lemali eyiphepha, iphepha lezibambiso, iphepha lokuhlobisa, iphepha eliyisisekelo lokukhulula kanye nephepha elinamathela kabili lezinga eliphezulu).

I-CMC isetshenziswa ekugcineni okumanzi komshini wephepha ukuze wengeze, esikhathini esidlule, i-sodium carboxymethyl cellulose CMC embonini yokwenza amaphepha isetshenziswa ikakhulukazi ekuhlanganiseni nasekulinganiseni indawo, uginindela ngokusungulwa kwesayensi nobuchwepheshe, eminyakeni yamuva nje i-international inokuningi. yabakhiqizi bamaphepha ngokusebenzisa ukuphela okumanzi i-CMC yengezwe ukuthuthukisa ikhwalithi yemikhiqizo futhi impumelelo nayo ibaluleke kakhulu.

Ukwengeza i-CMC ekugcineni okumanzi kunikeza izinzuzo eziningi ezinkulu:

1.Ukuze kuthuthukiswe ukulingana kwephepha CMC kuyinto dispersant enhle kakhulu, ncibilikisa babe colloidal reagent CMC yengezwe ekwelapheni udaka ngemuva kalula kuhlanganiswe uginindela fibre futhi ugcwalise izinhlayiya ezibonakalayo, ngenxa yokusebenza electronegative CMC is ziyoncibilika emanzini, kuyokwenza ngokwayo. usuvele une-fiber yephepha kanye nezinhlayiya zokugcwalisa ze-electronegativity ye-charge engalungile, Izinhlayiya ezineshaja efanayo zizoxoshana, kanye ne-fiber kanye nesigcwalisi ukumiswa kwephepha kuzosatshalaliswa ngokulinganayo, okuyinto evumelana kakhulu nokwakhiwa kwemboni yamaphepha, bese kuthuthukisa ukufana kwephepha.

2. Ukuthuthukisa amandla angokomzimba we-pulp ukuze kuthuthukiswe ukufana kwe-pulp kusiza ukukhulisa ukuminyana komzimba we-pulp (njengokuthi: ukuminyana kokubukeka, ukudabuka, ubude bokuphuka, ukumelana nokuqhekeka nokumelana nokugoqa), i-CMC ekushintsheni ukufana kwephepha ngesikhathi esifanayo futhi kwandisa amandla ngokomzimba uginindela. Isakhiwo se-CMC siqukethe i-carboxymethyl ingaphuza i-hydroxyl ku-fiber lead to compound reaction, ihlanganise amandla esibopho phakathi kwemicu, ngokukhiqizwa ngokomzimba kwenqubo yokukhiqiza ngemuva komshini wephepha, amandla esibopho phakathi kwemicu azokwanda kakhulu, umphumela umzimba oyinhloko ekhasini lephepha konke ukwanda kokuqina komzimba.

I-CMC yebanga lephepha isebenzisa:

Embonini yamaphepha, i-CMC isetshenziswa enqubweni ye-pulping, engathuthukisa izinga lokugcinwa futhi ikhulise amandla amanzi. Isetshenziselwa ukulinganisa kwendawo, njenge-excipient ye-pigment, ithuthukisa ukunamathela kwangaphakathi, inciphise uthuli lokunyathelisa, ithuthukise ikhwalithi yokunyathelisa; Isetshenziselwa ukumboza iphepha, ivumela ukuhlakazeka kanye nomswakama we-pigment, ithuthukise ukushelela kwephepha, ukushelela, izakhiwo zokubona kanye nokuvumelana nezimo zokuphrinta. Embonini yephepha njengenani elisebenzayo kanye nohlu olubanzi lwezithasiselo, ikakhulukazi ngenxa yokwakheka kwefilimu ye-polymer encibilikayo emanzini kanye nokumelana nowoyela.

●Isetshenziselwa ukwenza usayizi wephepha, ukuze iphepha libe nokuminyana okuphezulu, ukumelana nokuqina kwe-inki okuhle, ukuqoqwa kwe-wax ephezulu kanye nokushelela.

●Ingakwazi ukuthuthukisa isimo se-fiber yangaphakathi ye-viscosity yephepha, ukuze ithuthukise amandla ephepha nokumelana nokugoqa.

●Enqubweni yokufaka imibala yephepha nephepha, i-CMC isiza ukulawula ukugeleza kokunamathisela kombala nokumuncwa kahle kukayinki.

Ngokuvamile, umthamo onconyiwe ngu-0.3-1.5%.