I-CMC yokwaleka iphepha

I-Sodium Carboxymethyl Cellulose (CMC)yi-polymer compound ebalulekileyo enyibilikayo emanzini, esetyenziswa kakhulu ekwenzeni iphepha, kwimpahla, ekutyeni, kumayeza, kwiikhemikhali zemihla ngemihla nakwezinye iindawo. Kwishishini lokwenza iphepha, ingakumbi ekugqumeni iphepha (ugqumeni), i-CMC ibe yenye yezona zinto zibalulekileyo zokongeza ugqumeni ngenxa yeempawu zayo ezilungileyo zokwenza ifilimu, ukunamathela, ukusasazeka kunye neempawu ze-rheological.

1. Iimpawu ezisisiseko ze-CMC

I-CMC yi-anionic cellulose ether eyenziwe ngokungenisa amaqela e-carboxymethyl kwiimolekyuli ze-cellulose ezisekelwe kwi-cellulose yendalo ngeendlela zeekhemikhali. Yimpuphu emhlophe okanye emthubi kancinci, enyibilikayo lula emanzini abandayo, kwaye yenza ulwelo olucacileyo oluqinileyo. Iiparameter eziphambili zokusebenza kwe-CMC ziquka iqondo lokutshintshwa (DS), i-viscosity, ubumsulwa, njl.njl., phakathi kwazo iqondo lokutshintshwa lidla ngokuba phakathi kwe-0.4 kunye ne-1.4. Okukhona iqondo lokutshintshwa liphezulu, kokukhona ukunyibilika kwamanzi kwe-CMC kungcono; i-viscosity imisela iipropati ze-rheological kunye namathuba okusetyenziswa kwesisombululo sayo.

2. Indima yeCMC ekugqumeni amaphepha

Ukwambathisa iphepha kubhekisa ekusebenziseni umaleko wokwambathisa owenziwe ngeepigment kunye nee-binders kumphezulu wephepha ukuphucula ukusebenza kokuprinta, ukukhazimla, ukuguda kunye namandla okufihla iphepha. Njengesongezelelo esisebenzayo kwifomula yokukwambathisa, i-CMC inemisebenzi ephambili elandelayo:

Isisasazi:I-CMC inokusasazeka kakuhle kwaye inokusasaza ngempumelelo imibala engaphiliyo efana ne-kaolin, i-calcium carbonate, umgubo we-talcum, njl.njl. kwi-coating ukuthintela ukutyibilika kwemibala kunye nokuna kwemvula, ngaloo ndlela iphucula uzinzo lwe-coating.

Isibopheleli:I-CMC inokunyusa amandla okubopha phakathi kwamasuntswana e-pigment kwi-coating naphakathi kwee-pigment kunye neefayibha zephepha, kwaye iphucule amandla olwakhiwo kunye nokumelana nokuguguleka kwe-coating.

Isithambisi:Isisombululo samanzi se-CMC sinoburhabaxa obuphezulu kwaye sinokulungisa iipropati ze-rheological zengubo, ukuze ibe nokuthamba okuhle, isasazeke kwaye imiswe ngexesha lenkqubo yokubopha.

Ipropati yokwenza ifilimu:I-CMC inokwenza ifilimu efanayo emva kokuba yomile phezu kwephepha, iphucule ukugudiswa nokukhazimla kwengubo, kwaye iphucule ukucaca komfanekiso oshicilelweyo.

Ukumelana nokuthamba nothuli:I-CMC inokuphucula ukutyeba kwengubo, inciphise ukuguguleka koomatshini, ithintele ukuveliswa kothuli, kwaye iphucule umgangatho wendalo yemveliso.

3. Ukusetyenziswa kunye neendlela zokuzikhusela

Kwiindlela zokugquma iphepha, kukho iindlela ezilandelayo zokusebenzisa i-CMC:

Ukongeza ngokuthe ngqo njengenxalenye yokugquma: Nyibilikisa umgubo owomileyo we-CMC emanzini ukulungiselela uxinzelelo oluthile lwesisombululo samanzi (ngokubanzi i-1%-5%), uze uyifake kwigquma uze uxube ngokulinganayo.

Sebenzisa kunye nezinye izinto zokubopha: Ukuze kuphuculwe ukusebenza kwengubo, i-CMC idla ngokusetyenziswa kunye ne-latex (efana ne-styrene-butadiene latex, i-ethylene-vinyl acetate emulsion, njl.njl.) ukuze idlale indima yokusebenzisana.

Lungisa ulawulo lwe-viscosity: Iindidi ezahlukeneyo zephepha kunye nezixhobo zokugquma zineemfuno ezahlukeneyo ze-viscosity yokugquma. Ukusebenza okufunekayo kunokufezekiswa ngokukhetha i-CMC yeendidi ezahlukeneyo ze-viscosity okanye ukulungisa ubungakanani bokongeza.

Amanyathelo okhuseleko aquka:

Kuphephe ukuhlangana xa kunyibilikiswa i-CMC. Amanzi afudumeleyo angasetyenziswa ukongeza kancinci nokuxuba;

Kuphephe ukudibana ne-asidi ezinamandla kunye ne-alkali ixesha elide ukuze uphephe ukubola;

Gcina indawo yokugcina yomile ukuze kuthintelwe ukufunxwa komswakama kunye nokuhlangana.

4. Isiphumo sesicelo se-CMC kwiphepha eligqunyiweyo

Emva kokusebenzisa i-CMC, zonke izalathisi zokusebenza kwephepha eligutyungelweyo ziphucuke kakhulu:

Ubuthambileyo bomphezulu kunye nokukhazimla kuyaphucuka;

Ukufana kwengubo kuyaphuculwa;

Ukucaca komfanekiso oprintwayo kungcono kwaye ukuprintwa kuyaphucuka;

Ukuqina kwephepha, amandla okutsalwa kunye nokumelana nokugoba kuyaphuculwa;

Izinga lokugquma kwenkunkuma liyancitshiswa kwaye uzinzo lokugcina luyaphucuka.

I-CMCsisixhobo esiluhlaza nesinobuhlobo nokusingqongileyo esihlangabezana neemfuno zoshishino lwanamhlanje lokwenza amaphepha ukuze kubekho uphuhliso oluzinzileyo.

5. Indlela yophuhliso

Ngenxa yokuphuculwa okuqhubekayo kweemfuno zomgangatho wephepha elinophahla oluphezulu njengephepha elinophahla, ikhadibhodi, iphepha leelebheli, njl.njl., ukuguqulwa kokusebenza kunye nokusetyenziswa ngokufanelekileyo kwe-CMC kuye kwaba yindawo ephambili yophando. Kwixesha elizayo, ngokudityaniswa nezixhobo ezintsha ezisebenzayo ezifana nezinto ezincinci kunye neebhayopolymers, kulindeleke ukuba kuphucule ngakumbi umgangatho wokusetyenziswa kwe-CMC kwicandelo lokupenda iphepha.