Ukusetshenziswa kwe-HEC kupende we-latex

I-Hydroxyethyl Cellulose (HEC)iyi-polymer engeyona i-ionic encibilikayo emanzini, eguqulwa ngamakhemikhali kusuka ku-cellulose yemvelo. Inezakhiwo ezinhle zokuncibilika kwamanzi, ukuqina, ukugcinwa kwamanzi kanye nokwakha ifilimu. Kupende we-latex, i-hydroxyethyl cellulose iyisengezo esibalulekile futhi isetshenziswa kabanzi ezimbozweni zodonga zangaphakathi nangaphandle ukuze iqine, izinze, ihlakaze, imise futhi ithuthukise ukusebenza kahle.

1. Izakhiwo eziyinhloko ze-hydroxyethyl cellulose

Ukuncibilika kwamanzi okuhle: I-HEC ingancibilika ngokushesha emanzini abandayo nasemanzini ashisayo ukuze kwakheke isixazululo se-colloidal esibonakalayo nesifanayo.

Umphumela osobala wokujiya: Kungakhuphula ngempumelelo ukujiya kopende we-latex futhi kuthuthukise ukusebenza kwawo kanye nokuhleleka kwawo.

Ukuqina kokumiswa okuqinile: Kungavimbela ukuchitheka kwezinhlayiya kanye nama-filler futhi kuthuthukise ukuqina kokugcinwa kopende we-latex.

Izakhiwo ezinhle zokwakha ifilimu: Kuyasiza ekwakheni ifilimu yokumboza ebanzi futhi kuthuthukise ukugcwala kanye nokuba yisicaba kwefilimu yopende.

Ukuhambisana okuqinile: Kuhambisana kahle nezinhlobonhlobo ze-emulsions, i-pigment, ama-fillers nezinye izithasiselo. 

2. Indima ye-hydroxyethyl cellulose kupende we-latex

Ukuqinisa: Lawula izakhiwo ze-rheological zepende, uvimbele ukuconsa nokuchaphaza, futhi uthuthukise ukusebenza kokuxubha nokugingqa.

I-ejenti yokugcina amanzi: Ivimbela ukulahleka kwamanzi ependeni ngesikhathi sokwakhiwa futhi ithuthukise ikhwalithi yokwakha ifilimu ngesikhathi senqubo yokomisa.

Isiqinisi: Thuthukisa ukuhlakazeka kanye nokuqina kwe-emulsion kanye ne-pigment filler kufomula ukuvimbela ukuhlukaniswa kanye nokuhlangana.

Thuthukisa ukusebenza kokwakhiwa: Thuthukisa ukuthambisa kanye nokushelela kokwakhiwa ukuze wenze ukuxubha kube bushelelezi futhi kube ngokwemvelo.

3. Indlela yokusebenzisa

3.1. Indlela yokuhlakazwa ngqo kwempuphu eyomile

Kusebenza ezimweni zokukhiqiza ngemishini yokuhlakazeka esheshayo:

Engeza inani elibekiwe lamanzi ahlanzekile ethangini lokuxuba;

Qala ukuxuba ngesivinini esikhulu bese ufaka kancane kancane i-HEC dry powder;

Qhubeka uvuselela imizuzu eyi-15-30 kuze kube yilapho i-HEC imanzi ngokuphelele futhi ihlakazekile;

Yima ihora eli-1-2 (noma ngaphezulu) ukuze ivuvuke ngokuphelele;

Hlanganisa futhi kuze kube yilapho incibilika ngokuphelele ukuze kwakheke isixazululo esiqinile nesibonakalayo;

Engeza amanye ama-emulsion, ama-pigment, izithasiselo, njll. ukuze wenze upende we-latex.

3.2. Indlela yotshwala obuse-pre-gelatinized

Ilungele ukukhiqizwa ngobuningi, kulula ukuyisebenzisa nokukala:

I-HEC yokuqala emanzi ngamanzi;

Shisa kancane kancane kufike ku-60-70℃ ngaphansi kokuxubha ngesivinini esiphansi ukuze kukhuthazwe ukuncibilika kwayo;

Noma sebenzisa inqubo yokuncibilikisa ngokufaka inani elincane le-alkali (njengamanzi e-ammonia);

Ngemva kokuncibilika, kwakheka uketshezi olufana nolwe-mother olufakwe i-gelatinized pre-gelatinized, olungafakwa kupende we-latex uma kudingeka.

4. Izincomo zomthamo

Inani le-hydroxyethyl cellulose elifakwe kupende we-latex ngokuvamile lingu-0.2% ~ 1.0% (ngokusekelwe kwikhwalithi yomkhiqizo oqediwe), elilungiswa ngokuya nge-viscosity edingekayo kanye nokusebenza kokwakhiwa.

I-viscosity (ngokuvamile esekelwe kusisombululo samanzi esingu-2%) inezinhlobonhlobo zezinketho, kusukela kumashumi ama-mPa·s kuya kumakhulu ezinkulungwane zama-mPa·s. Ezivame ukusetshenziswa yilezi:

30,000~60,000 mPa·s: ngopende we-latex oqinile ophakathi nendawo nophezulu;

100,000~200,000 mPa·s: ngopende obukhulu noma upende wokunamathisela.

5. Izinyathelo Zokuqapha

Ukuhleleka kokuhlakazeka kubalulekile: impuphu eyomile kumele ihlakazwe ngokulinganayo ukuze kugwenywe ukuhlangana kwendawo kanye nobunzima bokuhlakazeka.

Vimbela ukubilisa: Uma ufaka i-HEC, kufanele kugcinwe ukuxubha okusheshayo ukuze kuvinjelwe ukuhlangana kwempuphu ukuthi kungathinti ukuncibilika.

Ukuqina kwesitoreji: Isixazululo se-HEC kufanele sigcinwe ekamelweni lokushisa ukuze kugwenywe ukuchayeka isikhathi eside ekushiseni okuphezulu noma endaweni enamandla ye-asidi ne-alkali.

Ukuhlolwa kokuhambisana: Ukuhambisana kwe-HEC nama-emulsions kanye nezithasiselo ezivela kubakhiqizi abahlukene kungahluka, futhi ifomula kufanele inqunywe ngemva kokuhlolwa.

Njengesithako esiqina amanzi esisebenza kahle, esingabizi futhi esinobungani nemvelo, ukusetshenziswa kwei-hydroxyethyl cellulose kupende we-latexinikeza umkhiqizo ulwazi oluhle lokulawula i-rheological kanye nokwakhiwa. Ngokukhetha ibanga le-viscosity ngokufanele, ukulawula indlela yokwengeza kanye nesilinganiso sefomula, ukusebenza kopende we-latex kungathuthukiswa kakhulu. Ngokuphishekela okuqhubekayo ukuvikelwa kwemvelo kanye nokusebenza embonini yezingubo zokwakha, inani lokusetshenziswa kwe-HEC lizogqanyiswa kakhulu.