I-Sodium carboxymethyl cellulose (CMC) yokwambathisa iphepha

I-sodium carboxymethyl cellulose (CMC)yipolymer enyibilikayo emanzini ye-anionic efunyenwe ngokuguqulwa kweekhemikhali ngokusekelwe kwi-cellulose yendalo. Inokunyibilika kwamanzi okuhle, ipropati yokwenza ifilimu, inamathela, iyaqina kwaye izinzile ekumisweni, kwaye isetyenziswa kakhulu kwiikhonkco ezininzi zoshishino lokwenza iphepha, ingakumbi kwifomyula yokugcoba iphepha.

1. Iimfuno ezisisiseko zokugquma iphepha

Eyona njongo iphambili yokwambathisa iphepha kukuphucula iipropati zomphezulu wephepha, kubandakanya ukuguda, ukukhazimla, ukungabonakali, ukufunxwa kweyinki, ukuguquguquka kokuprinta, njl.njl. Iifomyula zokugquma eziqhelekileyo zenziwe ngeepigment (ezifana ne-kaolin, i-calcium carbonate, i-talc, njl.njl.), izihlanganisi (ezifana nee-emulsions, istarch, i-CMC, njl.njl.) kunye nezinye izongezo (ezifana nezisasazi, izinto zokuthambisa, izinto zokuthintela amanzi, njl.njl.). Ngexesha lenkqubo yokugquma, ukuzinza kunye nokuchaneka kwefomyula yokugquma kunye nesakhiwo sokugquma emva kokomiswa kudlala indima ebalulekileyo kumgangatho wokugqibela wephepha.

2. Indima yeCMC ekugqumeni amaphepha

2.1. Umsebenzi we-Binder

I-CMC ingasetyenziswa njengesihlanganisi sokuncedisa kwiimibala, kwaye isebenze nesihlanganisi esiphambili (esifana ne-emulsion, istatshi) ukuphucula ukunamathela kweemibala kumphezulu wephepha, ngaloo ndlela iphucula ukuqina kwengubo kunye nokumelana nokuxobuka.

2.2. Umlawuli we-Thickener kunye ne-rheology

I-CMC inokwenza isisombululo se-colloidal esine-viscosity ethile emanzini, esinokulungisa ngokufanelekileyo iipropati ze-rheological ze-coating, siphucule ukufana kunye nokuzinza kwe-coating ngexesha lenkqubo ye-coating, kwaye sincede ekufumaneni ubukhulu be-coating obufanayo.

2.3. Isizinzisi sokusasazeka

Ukongeza ubungakanani obufanelekileyo be-CMC kwifomyula yokugquma kunokuphucula ukusasazeka kwamasuntswana e-pigment, kuthintele ukugawulwa kwe-pigment kunye nokuqunjelwa, kwaye kuqinisekise uzinzo lwe-coating ngexesha lokugcina nokusetyenziswa.

2.4. Phucula ukusebenza kokugquma

I-CMC inokuguquguquka okuhle kunye nokufana kwefilimu emva kokwenziwa kwefilimu, nto leyo enokuphucula kakhulu ukutyibilika komphezulu, ukugudiswa kunye nokuguquguquka kokuprinta kwengubo, efanelekileyo ngakumbi kwiphepha eligudisiweyo, ikhadibhodi emhlophe egudisiweyo, iphepha lokushicilela elikumgangatho ophezulu, njl.

2.5. Ukugcinwa kwamanzi kunye nokuthamba kwawo

I-CMC inokuphucula amandla okugcina amanzi kwengubo, ithintele ukuguquguquka ngokukhawuleza kwamanzi kwingubo phantsi kwengubo ekhawulezayo okanye kwindawo yokomisa, kwaye iqinisekise ukwakheka okufanayo kwengubo; kwangaxeshanye, ukuthambisa kwayo kukwanceda ekunciphiseni ukungqubana koomatshini kunye nokuphucula ukusebenza kakuhle kwemveliso.

3. Iimpawu zokusetyenziswa kwe-CMC

3.1. Ukunyibilika kwamanzi okugqwesileyo

I-CMC kulula ukuyinyibilikisa emanzini abandayo, kulula ukuyisebenzisa, kwaye ingalungiswa ngqo kubushushu begumbi ngaphandle konyango lokufudumeza.

3.2. Iintlobo ze-viscosity ezityebileyo

I-CMC enamabakala ahlukeneyo e-viscosity ifanelekile kwiintlobo ezahlukeneyo zephepha eligqunyiweyo kunye neemfuno zenkqubo. Abasebenzisi banokukhetha imodeli efanelekileyo ngokweemfuno zokwenyani.

3.3. Uzinzo olufanelekileyo lweekhemikhali

I-CMC inokunyamezela okukhulu ubushushu, ukukhanya, i-asidi kunye ne-alkali, kwaye kulula ukuyibola okanye ukuwohloka emva kokusetyenziswa ixesha elide.

3.4. Inobuhlobo nokusingqongileyo kwaye ayinabungozi

Njenge-cellulose derivative evela kwimithombo yendalo, i-CMC ayinabungozi kwaye ayinobungozi, nto leyo ehambelana nophuhliso lokhuseleko oluluhlaza kwishishini lokwenza amaphepha.

4. Amanqaku aphambili enkqubo yesicelo

Xa isetyenziswa ngokwenene, ukuqinisekisa ukuba i-CMC idlala indima engcono kwinkqubo yokugquma, kufuneka kuqatshelwe la manqaku alandelayo:

4.1. Indlela efanelekileyo yokunyibilikisa

Ngaphambi kokusebenzisa i-CMC, kufuneka yongezwe kancinci emanzini abandayo axutywa ngesantya esiphezulu ukuze kuthintelwe ukuhlangana kunye nokuqina okugqithisileyo kwendawo. Kucetyiswa ukuba uyidibanise ngamaqela kwaye uqhubeke uyixuba ide inyibilike ngokupheleleyo.

4.2. Ulawulo olufanelekileyo lwedosi

Ngokubanzi, ubungakanani be-CMC eyongeziweyo yi-0.1% ukuya kwi-0.5% yobunzima obomileyo bengubo. Ubungakanani buhlengahlengiswa ngokweemfuno zokusebenza kwengubo kunye nenkqubo yokugquma. Ukongeza kakhulu kunokubangela ukuba i-viscosity yengubo ibe phezulu kakhulu, nto leyo echaphazela ukusebenza kwengubo.

4.3. Ukuhambelana okuhle nezinye izongezo

I-CMC iyahambelana neentlobo ngeentlobo zezithako zokugquma (ezifana nee-emulsions, ii-dispersants, izithinteli zokungcola, njl.njl.), kodwa kufuneka kuqwalaselwe ukuhambelana kwayo nezithako ezinamandla ze-cationic ukuthintela ukuqunjelwa kunye nokuna kwemvula.

5. Imizekelo yokusetyenziswa kwe-CMC kwiintlobo ezahlukeneyo zephepha

Iphepha eligqunyiweyo: lisetyenziselwa ukuphucula ukuguda kunye nokukhanya kwengubo, ngelixa liphucula ukunamathela kwengubo;

Ikhadibhodi emhlophe: iphucula ukumelana nokugoba kunye nokuguquguquka kokuprinta;

Iphepha leelebheli kunye nephepha elishushu: phucula ukufana kombala womphezulu kunye nokucaca kokuprinta;

Iphepha elitsha eligqunywe ngepeyinti: liphucula uzinzo lolwelo olugqunywe ngepeyinti kwaye linciphise ukungena kwe-inki eprintiweyo.

Njengekhompawundi yendalo yepolymer esebenza kakuhle, i-sodium carboxymethyl cellulose idlala imisebenzi emininzi kwiingubo zephepha, ezinje ngokubopha, ukuqina, ukusasaza kunye nokuphucula iipropati zomphezulu. Ixabiso layo eliphantsi, uzinzo oluhle kunye neempawu zokukhusela okusingqongileyo zenza ukuba ithathe indawo ebalulekileyo kushishino lwanamhlanje lokwenza iphepha. Ngokuphuculwa okuqhubekayo kweemfuno zomgangatho wephepha kunye nokukhuthazwa kweengcamango zokwenza iphepha eliluhlaza,I-CMC iza kuqhubeka idlala indima enkulu ekusetyenzisweni kwayo kwicandelo lokugquma amaphepha.