Ngophuhliso kunye nokusetyenziswa kwepeyinti yelatex esekwe emanzini, ukhetho lwe-thickener yepeyinti yelatex luyahlukahluka. Ukulungiswa kwe-rheology kunye nolawulo lwe-viscosity yepeyinti yelatex ukusuka kwizinga eliphezulu, eliphakathi neliphantsi lokucheba. Ukukhethwa kunye nokusetyenziswa kwe-thickeners zepeyinti yelatex kunye nepeyinti yelatex kwiinkqubo ezahlukeneyo ze-emulsion (i-acrylic ecocekileyo, i-styrene-acrylic, njl.njl.).
Indima ephambili yeziqinisi kwipeyinti zelatex, apho i-rheology yenye yezinto ezibalulekileyo ezenza ukubonakala nokusebenza kweefilimu zepeyinti. Kwakhona cinga ngempembelelo ye-viscosity ekunikweni kwepigment, ukuxubha, ukulingana, ukugcwala kwefilimu yepeyinti, kunye nokugoba kwefilimu yomphezulu ngexesha lokuxubha ngokuthe nkqo. Le yimiba yomgangatho abavelisi abadla ngokuyiqwalasela.
Ukwakheka kwengubo kuchaphazela i-rheology yepeyinti ye-latex, kwaye i-viscosity inokulungiswa ngokutshintsha uxinzelelo lwe-emulsion kunye noxinzelelo lwezinye izinto eziqinileyo ezisasazeke kwipeyinti ye-latex. Nangona kunjalo, uluhlu lohlengahlengiso lulinganiselwe kwaye ixabiso liphezulu. I-viscosity yepeyinti ye-latex ilungiswa ikakhulu zi-thickeners. Izi-thickeners ezisetyenziswa rhoqo zezi: ii-thickeners ze-cellulose ether, ii-thickeners ze-polyacrylic acid emulsion ezikhula ngokukhawuleza, ii-thickeners ze-polyurethane ezingezizo i-ionic, njl. I-Hydroxyethyl cellulose ether thickener ikakhulu yonyusa i-viscosity ephakathi nephantsi yepeyinti ye-latex, kwaye ine-thixotropy enkulu. Ixabiso lemveliso likhulu. I-chain ephambili ye-hydrophobic ye-cellulose thickener inxulunyaniswa nee-molecule zamanzi ezijikelezileyo ngokusebenzisa i-hydrogen bonding, eyonyusa umthamo wolwelo lwe-polymer ngokwayo. Indawo yokuhamba ngokukhululekileyo kwamasuntswana iyancitshiswa. I-viscosity yenkqubo iyandiswa, kwaye isakhiwo senethiwekhi esidityanisiweyo senziwe phakathi kwe-pigment kunye namasuntswana e-emulsion. Ukwahlula imibala kwenye nenye, amasuntswana e-emulsion awafane afunxe.
Ixesha lokuthumela: Novemba-02-2022