Sezvo viscosity yemvura-based resin yakanyanya kuderera, haigone kusangana nezvinodiwa zvekuchengetedza uye kuvaka kwekuita kwekuvhara, saka zvinodikanwa kushandisa yakakodzera thickener kugadzirisa viscosity yemvura-based coating kune iyo chaiyo mamiriro.
Kune marudzi akawanda e thickeners.Paunenge uchisarudza makobvu, mukuwedzera kune kukora kwadzo uye kutonga kwekupfekedza rheology, zvimwe zvimwe zvinhu zvinofanirwa kutariswa kuita kuti kukoira kuve nekuita kwekuvaka kwakanakisa, kutaridzika kwefirimu rekuputira uye hupenyu hurefu hwesevhisi.
Kusarudzwa kwemhando ye thickener inonyanya kuenderana nezvinodiwa uye mamiriro chaiwo ekugadzirisa.
Pakusarudza uye kushandisa thickeners, izvi zvinokosha.
1. High molecular uremu HEC ine hukuru hukuru hwekunamatira kana ichienzaniswa nechepasi molecular uremu uye inoratidza hukuru hwekukora hunobudirira panguva yekuchengetedza.Uye kana shear rate ichiwedzera, iyo inomonereka nyika inoparadzwa, iyo yakakura chiyero chekugera, iyo diki mhedzisiro yemolecular uremu pane viscosity.Iyi dhizaini yekukora haina chekuita neyakagadzika zvinhu, pigment uye additives inoshandiswa, inongoda chete kusarudza iyo chaiyo molecular uremu we cellulose uye gadzirisa iyo concentration ye thickener inogona kuwana iyo viscosity chaiyo, uye nekudaro inoshandiswa zvakanyanya.
2.HEUR thickener is a viscous aqueous solution ine diol kana diol ether se-co-solvent, ine zvinyorwa zvakasimba zve 20% ~ 40%.Basa re-co-solvent nderokudzivisa kunamatira, kana zvisina kudaro thickeners ari mu gel state panguva imwechete.Panguva imwecheteyo, kuvapo kwe solvent kunogona kudzivirira chigadzirwa kubva kuchando, asi inofanira kudziya muchando isati yashandiswa.
3. Yakaderera-yakasimba, yakaderera-viscosity zvigadzirwa zviri nyore kurasa uye zvinogona kutakurwa uye kuchengetwa muhuwandu.Naizvozvo, mamwe HEUR makobvu ane akasiyana akasimba emukati eiyo yakafanana chigadzirwa kupa.Iyo co-solvent content ye low viscosity thickeners yakakwirira, uye pakati-shear viscosity yepende ichave yakaderera zvishoma kana yakashandiswa, iyo inogona kugadziriswa nekuderedza co-solvent yakawedzerwa kune imwe nzvimbo mukugadzirisa.
4. Pasi pemamiriro akakodzera ekusanganiswa, pasi-viscosity HEUR inogona kuwedzerwa zvakananga kune latex paints.Paunenge uchishandisa yakakwira viscosity zvigadzirwa, iyo thickener inoda kuderedzwa nemusanganiswa wemvura uye co-solvent isati yawedzerwa.Kana iwe ukawedzera mvura kuti udzikise iyo thickener zvakananga, iyo inoderedza kuwanda kweyekutanga co-solvent muchigadzirwa, izvo zvinowedzera kunamatira uye kuita kuti viscosity isimuke.
5. Kuwedzera thickener kune tangi yekuvhenganisa kunofanirwa kuve kwakadzikama uye kunonoka, uye kunofanira kuiswa pamwe nemadziro emadziro.Kumhanya kwekuwedzera hakufanirwe kukurumidza zvekuti iyo gobvu inogara pamusoro pemvura, asi inofanira kudhonzwa mumvura uye ichitenderedzwa pasi ichitenderedza shaft inobvongodza, zvikasadaro iyo thickener haizosanganiswa zvakanaka kana iyo thickener ichave yakakora zvakanyanya. kana flocculated nekuda kwekuwanda kwenzvimbo.
6. HEUR thickener inowedzerwa kune tangi yekusanganisa pende mushure mezvimwe zvikamu zvemvura uye pamberi pemulsion, kuitira kuti ive nechokwadi chekupenya kwakanyanya.
7. HASE thickeners inowedzerwa zvakananga kune pende nenzira ye emulsion mukugadzirwa kwepende ye emulsion pasina kuderedzwa kwekare kana kusati kwave neutralization.Inogona kuwedzerwa sechikamu chekupedzisira muchikamu chekusanganiswa, muchikamu chekuparadzira pigment, kana sechikamu chekutanga mukusanganiswa.
8. Sezvo HASE iri high acid emulsion, mushure mekuwedzera, kana pane alkali mupende ye emulsion, ichakwikwidzana nealkali iyi.Nokudaro, zvinotarisirwa kuwedzera iyo HASE thickener emulsion zvishoma nezvishoma uye zvishoma nezvishoma, uye fambisa zvakanaka, kana zvisina kudaro, ichaita kuti pigment dispersion system kana emulsion binder kusagadzikana kwenzvimbo, uye iyo yekupedzisira inogadziriswa neboka repamusoro re neutralized.
9. Alkali inogona kuwedzerwa kare kana mushure mokunge mumiriri wehutsi awedzerwa.Kubatsira kwekuwedzera kumberi ndeyekuona kuti hapana kusagadzikana kwenzvimbo kwepigment dispersion kana emulsion binder ichakonzerwa neiyo thickener inobata alkali kubva pamusoro pe pigment kana binder.Kubatsira kwekuwedzera alkali mushure mezvo ndezvokuti zvimedu zvakakora zvakaparadzirwa zvakanaka zvisati zvaputika kana kunyungudutswa nealkali, kudzivirira kukora kwenzvimbo kana kusanganiswa, zvichienderana nekugadzirwa, midziyo uye nzira yekugadzira.Nzira yakachengetedzeka ndeyekunyorovesa HASE thickener nemvura kutanga wozoimisa nealkali pachine nguva.
10. HASE thickener inotanga kuzvimba nepH ingangoita 6, uye iko kukora kwekushanda kunouya mukutamba kwakazara pa pH ye7 kusvika 8. Kugadzirisa pH yependi yelatex kusvika pamusoro pe8 kunogona kuchengetedza pH yepende yelatex kubva pakuderera pasi pe8. , nokudaro kuve nechokwadi kugadzikana kwe viscosity.
Nguva yekutumira: Aug-05-2022