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 ezihlukene 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 kakhulu 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