I-Carboxymethyl Cellulose Sodium ye-Paper Coating

I-Carboxymethyl cellulose sodium (CMC-Na) iyi-polymer encibilika emanzini esetshenziswa kabanzi embonini yephepha njenge-ejenti yokuhlanganisa.I-CMC-Naitholakala ku-cellulose, okuyi-polymer yemvelo etholakala ezindongeni zamaseli ezitshalo. Ukuguqulwa kwamakhemikhali e-cellulose ngamaqembu e-carboxymethyl kubangela i-polymer encibilika emanzini enezindawo ezinhle kakhulu zokwenza ifilimu, okuyenza ibe ukukhetha okuhle kakhulu ekufakweni kwephepha lokumboza.

Ukufakwa kwephepha kuyinqubo yokusebenzisa ungqimba oluncane lwento enamathelayo ebusweni bephepha ukuze kuthuthukiswe ukuphrinta kwalo, ukubukeka, nokusebenza. Izinto zokumboza zingahlukaniswa zibe izigaba ezimbili: i-pigmented coating kanye ne-non-pigmented coatings. Izembatho ezinombala obomvu ziqukethe i-pigment enemibala, kuyilapho okungenayo i-pigmented kucacile noma obala. I-CMC-Na ivamise ukusetshenziswa njenge-binder ezimbotsheni ezingenaso sombala ngenxa yezakhiwo zayo zokwenza ifilimu kanye nekhono lokuthuthukisa izakhiwo ezingaphezulu njengokushelela, ukucwebezela, nokwamukela uyinki.

Ukusetshenziswa kwe-CMC-Na embotsheni yephepha kunikeza izinzuzo ezimbalwa, okuhlanganisa ukunamathela kwe-coating okuthuthukisiwe, ukuphrinta okuthuthukisiwe, nokumelana kwamanzi okuthuthukisiwe. Kulesi sihloko, sizohlola lezi zinzuzo ngokuningiliziwe, kanye nezici ezihlukahlukene ezithonya ukusebenza kwe-CMC-Na ekusetshenzisweni kokunamathisela iphepha.

I-Coating Adhesion Ethuthukisiwe

Enye yezinzuzo ezibalulekile zokusebenzisa i-CMC-Na ekuhlanganiseni kwephepha yikhono layo lokuthuthukisa ukunamathela kokunamathela. I-CMC-Na iyi-polymer eyi-hydrophilic engasebenzisana ne-hydrophilic surface yemicu yephepha, okuholela ekunamatheleni okuthuthukisiwe phakathi kwento enamathelayo nengaphezulu lephepha. Amaqembu e-carboxymethyl ku-CMC-Na ahlinzeka ngokuminyana okuphezulu kwamasayithi akhokhiswe kabi angakha amabhondi e-ionic namaqembu ashajwe kahle emicu yephepha, efana namaqembu e-amine noma e-carboxylate.

Ngaphezu kwalokho, i-CMC-Na ingaphinda yakhe izibopho ze-hydrogen namaqembu e-hydroxyl kumafayibha e-cellulose, ithuthukise nokunamathela phakathi kwento enamathelayo nengaphezulu lephepha. Lokhu kunamathela okuthuthukisiwe kubangela ungqimba olufana nolunye futhi kunciphisa ubungozi bokuthi i-delamination ye-coating phakathi nezinyathelo zokucubungula ezilandelayo ezifana ne-calendering noma ukuphrinta.

Ukuphrinta Okuthuthukisiwe

Enye inzuzo yokusebenzisa i-CMC-Na embotsheni yephepha yikhono layo lokuthuthukisa ukuphrinta. I-CMC-Na ingathuthukisa ubushelelezi obungaphezulu bephepha ngokugcwalisa izikhala nezimbotshana phakathi kwemicu yephepha, okuholela endaweni efanayo efanayo ngokungahambi kahle okumbalwa. Lokhu kushelela okuthuthukisiwe kungaholela ekudlulisweni kwe-inki okungcono, ukusetshenziswa kwe-inki okuncishisiwe, kanye nekhwalithi yokuphrinta ethuthukisiwe.

Ngaphezu kwalokho, i-CMC-Na ingaphinda ithuthukise ukwamukelwa kwe-inki kwendawo yephepha ngokunikeza ungqimba oluningi olufana nolubambayo olumunca futhi lusakaze uyinki ngokulinganayo. Lokhu kwamukeleka kwe-inki okuthuthukisiwe kungaholela ezithombeni ezibukhali, ukugcwala kombala okungcono, kanye nokuncipha kwe-inki smudging.

Ukumelana Namanzi Okuthuthukisiwe

Ukumelana namanzi kuyisici esibalulekile sezingubo zephepha, ikakhulukazi izinhlelo zokusebenza lapho iphepha lingase livezwe kumswakama noma umswakama. I-CMC-Na ingathuthukisa ukumelana kwamanzi kokunameka kwephepha ngokwenza ungqimba oluvimbela amanzi ukuthi angangeni ku-substrate yephepha.

Imvelo ye-hydrophilic ye-CMC-Na futhi iyivumela ukuthi ihlanganyele nama-molecule amanzi, okuholela ekuqineni ukumelana kwamanzi ngokusebenzisa i-hydrogen bonding kanye nokwakhiwa kwenethiwekhi ye-polymer ephakathi. Izinga lokumelana namanzi lingalawulwa ngokulungisa ukugxila kanye nezinga lokushintshwa kwe-CMC-Na ekwakhiweni kokumboza.