I-Hydroxyethyl Cellulose (HEC)yipolymer enyibilikayo emanzini engeyiyo ionic, eguqulwa ngokweekhemikhali kwi-cellulose yendalo. Inokunyibilika kwamanzi kakuhle, ityeba, igcina amanzi kwaye ineempawu zokwenza ifilimu. Kwipeyinti yelatex, i-hydroxyethyl cellulose sisongezelelo esibalulekileyo kwaye isetyenziswa kakhulu kwiingubo zodonga zangaphakathi nangaphandle ukuze ityebe, izinze, isasaze, imise kwaye iphucule ukusebenza kwayo.
1. Iipropati eziphambili ze-hydroxyethyl cellulose
Ukunyibilika kwamanzi okulungileyo: I-HEC inokunyibilika ngokukhawuleza emanzini abandayo nasemanzini ashushu ukuze yenze isisombululo se-colloidal esicacileyo nesifanayo.
Isiphumo esicacileyo sokutyeba: Inganyusa ngempumelelo ukutyeba kwepeyinti yelatex kwaye iphucule ukusebenza kwayo kunye nokulingana kwayo.
Uzinzo oluqinileyo lokumiswa: Lunokuthintela ukubola kweepigment kunye nezizalisi kwaye luphucule uzinzo lokugcina ipeyinti yelatex.
Iimpawu ezilungileyo zokwenza ifilimu: Inceda ekwenzeni ifilimu exineneyo yokugquma kwaye iphucule ukugcwala kunye nokuthe tyaba kwefilimu yepeyinti.
Ukuhambelana okuqinileyo: Ihambelana kakuhle neendidi ezahlukeneyo zee-emulsions, ii-pigment, ii-fillers kunye nezinye izongezo.
2. Indima ye-hydroxyethyl cellulose kwipeyinti ye-latex
Isiqinisi: Lawula iimpawu ze-rheological zepeyinti, uthintele ukuvuza nokutshiza, kwaye uphucule ukusebenza kokubrasha nokuqengqeleka.
Isixhobo sokugcina amanzi: Sithintela ukulahleka kwamanzi kwipeyinti ngexesha lokwakhiwa kwaye siphucule umgangatho wokwenza ifilimu ngexesha lenkqubo yokomisa.
IsiQinisekisi: Ukuphucula ukusasazeka kunye nokuzinza kwe-emulsion kunye ne-pigment filler kwifomyula ukuthintela ukuqhekeka kunye nokuhlangana.
Phucula ukusebenza kolwakhiwo: Phucula ukutyeba kunye nobuthambile bolwakhiwo ukuze ukubrasha kube lula kwaye kube kwendalo ngakumbi.
3. Indlela yokusebenzisa
3.1. Indlela yokusasazwa ngqo komgubo owomileyo
Isebenza kwiimeko zemveliso ngezixhobo zokusasazeka ezikhawulezayo:
Yongeza umlinganiselo ochaziweyo wamanzi acocekileyo kwitanki yokuxuba;
Qalisa ukuxuba ngesantya esiphezulu uze wongeze kancinci kancinci umgubo owomileyo we-HEC;
Qhubeka uvuselela imizuzu eli-15-30 ude i-HEC imanziswe ngokupheleleyo kwaye isasazeke;
Yima iyure e-1-2 (okanye ngaphezulu) ukuze ivuvuke ngokupheleleyo;
Xuba kwakhona ide inyibilike ngokupheleleyo ukuze yenze isisombululo esifana nesibonakalayo nesiqinileyo;
Yongeza ezinye ii-emulsions, ii-pigment, izongezo, njl.njl. ukwenza ipeyinti ye-latex.
3.2. Indlela yotywala obusetyhini obufakwe ijeli
Ifanelekile kwimveliso enkulu, kulula ukuyisebenzisa nokulinganisa:
Okokuqala manzisa i-HEC ngamanzi;
Fudumeza kancinci ukuya kuma-60-70℃ phantsi kokuxukuxa ngesantya esiphantsi ukuze inyibilike;
Okanye sebenzisa inkqubo yokunyibilikisa ngokongeza inani elincinci le-alkali (njengamanzi e-ammonia);
Emva kokunyibilika, kwenziwa utywala obufanayo obufakwe i-gelatinized pre-gelatinized, obunokongezwa kwipeyinti ye-latex xa kufuneka.
4. Ingcebiso yomthamo
Ubungakanani be-hydroxyethyl cellulose eyongezwe kwipeyinti yelatex ngokubanzi yi-0.2% ~ 1.0% (ngokusekelwe kumgangatho wemveliso egqityiweyo), ehlengahlengiswa ngokwe-viscosity efunekayo kunye nokusebenza kolwakhiwo.
I-viscosity (ngokubanzi isekelwe kwisisombululo samanzi esiyi-2%) inoluhlu olubanzi lokhetho, ukusuka kumashumi ee-mPa·s ukuya kumakhulu amawaka ee-mPa·s. Ezona zisetyenziswa kakhulu zezi:
30,000~60,000 mPa·s: zepeyinti zelatex ezithambileyo nezinoburhabaxa obuphakathi nophezulu;
100,000~200,000 mPa·s: kwiipeyinti ezityebileyo okanye iipeyinti zepeyinti.
5. Amanyathelo okuzikhusela
Ulandelelwano lokusasazeka lubalulekile: umgubo owomileyo kufuneka usasazwe ngokulinganayo ukuze kuthintelwe ukuhlangana kwendawo kunye nobunzima bokunyibilika.
Thintela ukugalela: Xa ufaka i-HEC, kufuneka uvuselele ngesantya esiphezulu ukuze uthintele ukuhlangana komgubo ukuba kungaphazamisi ukunyibilika.
Uzinzo lokugcina: Isisombululo se-HEC kufuneka sigcinwe kubushushu begumbi ukuze kuthintelwe ukuvezwa ixesha elide kubushushu obuphezulu okanye kwindawo ene-asidi enamandla kunye ne-alkali.
Uvavanyo lokuhambelana: Ukuhambelana kwe-HEC kunye nee-emulsions kunye nezongezo ezivela kubavelisi abahlukeneyo kunokwahluka, kwaye ifomula kufuneka imiselwe emva kovavanyo.
Njengesixhobo sokunyibilikisa amanzi esisebenza kakuhle, esingabizi kakhulu nesinobuhlobo nokusingqongileyo, ukusetyenziswai-hydroxyethyl cellulose kwipeyinti yelatexInika imveliso ulawulo oluhle lwe-rheological kunye namava okwakha. Ngokukhetha ngokufanelekileyo i-viscosity grade, ukulawula indlela yokongeza kunye nomlinganiselo wefomula, ukusebenza kwepeyinti yelatex kunokuphuculwa kakhulu. Ngokuqhubeka nokufuna ukhuseleko lokusingqongileyo kunye nokusebenza kushishino lwezogqumo zokwakha, ixabiso lokusetyenziswa kwe-HEC liya kugxininiswa ngakumbi.
Ixesha leposi: Meyi-31-2025