Ngokuthuthuka kanye nokusetshenziswa kopende we-latex osuselwe emanzini, ukukhetha kwe-latex thickener yepende kuyahlukahluka.Ukulungiswa kwe-rheology nokulawulwa kwe-viscosity yamapende we-latex kusuka kumazinga aphezulu, aphakathi nendawo naphansi.Ukukhethwa nokusetshenziswa kwama-thickeners opende be-latex namapende e-latex ezinhlelweni ezahlukene ze-emulsion (i-acrylic ehlanzekile, i-styrene-acrylic, njll.).
Indima eyinhloko yama-thickeners kumapende e-latex, lapho i-rheology ingenye yezinto ezibalulekile ezakha ukubukeka nokusebenza kwamafilimu okupenda.Futhi cabangela umthelela we-viscosity emvuleni ye-pigment, ukuxubha, ukulinganisa, ukugcwala kwefilimu kapende, kanye nokucwila kwefilimu engaphezulu ngesikhathi sokuxubha okuqondile.Lezi yizindaba zekhwalithi abakhiqizi abavame ukuzicabangela.
Ukwakheka kwe-coating kuthinta i-rheology yopende we-latex, futhi i-viscosity ingashintshwa ngokushintsha ukugxila kwe-emulsion kanye nokugxila kwezinye izinto eziqinile ezihlakazekile kupende lwe-latex.Nokho, ububanzi bokulungisa bulinganiselwe futhi izindleko ziphezulu.I-viscosity yepende ye-latex ilungiswa ikakhulukazi ngama-thickeners.Ama-thickeners asetshenziswa kakhulu yilawa: i-cellulose ether thickeners, i-alkali-swellable polyacrylic acid emulsion thickeners, i-non-ionic associative polyurethane thickeners, njll. I-Hydroxyethyl cellulose ether thickener inyusa ngokuyinhloko i-viscosity ye-shear emaphakathi nephansi kapende we-latex, futhi ine-thixotropy enkulu.Inani lesivuno likhulu.Iketango eliyinhloko le-hydrophobic ye-cellulose thickener lihlotshaniswa nama-molecule amanzi azungezile ngokusebenzisa i-hydrogen bonding, okwandisa umthamo woketshezi we-polymer ngokwayo.Isikhala sokuhamba mahhala kwezinhlayiya sincishisiwe.I-viscosity yesistimu iyanda, futhi isakhiwo senethiwekhi esixhunywe esiphambanweni sakhiwe phakathi kwe-pigment kanye nezinhlayiya ze-emulsion.Ukuze uhlukanise ama-pigments komunye nomunye, izinhlayiya ze-emulsion azivamile ukukhangisa.
Isikhathi sokuthumela: Nov-02-2022