Namuhla sizogxila endleleni yokwengeza izinhlobo ezithile zezithisi.
Izinhlobo zezithisi ezivame ukusetshenziswa kakhulu yi-inorganic, i-cellulose, i-acrylic, kanye ne-polyurethane.
Okungaphili
Izinto ezingaphili ngokuyinhloko yi-bentonite, i-fumed silicon, njll., ezivame ukungezwa ku-slurry ukuze zigaywe, ngoba kunzima ukuzihlakaza ngokuphelele ngenxa yamandla okuxuba upende avamile.
Kukhona nengxenye encane ezohlakazwa kusengaphambili bese ilungiswa ibe yijeli ukuze isetshenziswe.
Zingafakwa kupende ngokugaya ukuze kwenziwe inani elithile le-pre-gel. Kukhona nezinye okulula ukuzihlakaza futhi zingenziwa i-gel ngokuzixuba ngesivinini esikhulu. Ngesikhathi senqubo yokulungiselela, ukusetshenziswa kwamanzi afudumele kungakhuthaza le nqubo.
I-Cellulose
Umkhiqizo we-cellulosic osetshenziswa kakhulu yi-i-hydroxyethyl cellulose (HEC)Ukugeleza nokuhleleka okubi, ukumelana namanzi okwanele, ukumelana nesikhunta nezinye izakhiwo, akuvamile ukusetshenziswa kupende lwezimboni.
Uma isetshenziswa, ingafakwa ngqo noma incibilikiswe emanzini kusengaphambili.
Ngaphambi kokwengeza, kufanele kuqashelwe ukulungisa i-pH yesistimu ibe yizimo ze-alkaline, okusiza ekuthuthukisweni kwayo ngokushesha.
I-Acrylic
Izithambisi ze-Acrylic zinezinhlelo ezithile zokupenda zezimboni. Zisetshenziswa kakhulu ekumbozweni okuvamile njenge-single component kanye ne-pigment-to-base ratio ephezulu, njengezakhiwo zensimbi kanye nama-primer avikelayo.
Ku-topcoat (ikakhulukazi i-topcoat ecacile), enezingxenye ezimbili, i-baking varnish, upende ocwebezelayo nezinye izinhlelo, inamaphutha athile futhi ayikwazi ukusebenza kahle ngokugcwele.
Umgomo wokujiya we-acrylic thickener uthi: iqembu le-carboxyl ku-polymer chain liguqulwa libe yi-ionized carboxylate ngaphansi kwezimo ze-alkaline, futhi umphumela wokujiya ufinyelelwa ngokuxoshwa kwe-electrostatic.
Ngakho-ke, i-pH yesistimu kufanele ilungiswe ibe yi-alkaline ngaphambi kokusetshenziswa, futhi i-pH kufanele igcinwe ku->7 ngesikhathi sokugcina okulandelayo.
Ingangezwa ngqo noma ixutshwe ngamanzi.
Ingancibilikiswa kusengaphambili ukuze isetshenziswe kwezinye izinhlelo ezidinga ukuzinza okuphezulu kwe-viscosity. Okungukuthi: okokuqala ncibilikisa i-acrylic thickener ngamanzi, bese ufaka i-pH adjuster ngenkathi uvuselela. Ngalesi sikhathi, isixazululo siyaqina ngokusobala, kusukela kumhlophe onjengobisi kuya ku-paste ecacile, futhi singashiywa sime ukuze sisetshenziswe kamuva.
Ukusebenzisa le ndlela kunciphisa ukusebenza kahle kokujiya, kodwa kungandisa ngokuphelele ukujiya esigabeni sokuqala, okusiza ekuzinzeni kokujiya ngemva kokwenziwa kopende.
Enqubweni yokwakheka nokukhiqiza upende wesiliva onesici esisodwa osekelwe emanzini i-H1260, i-thickener isetshenziswa ngale ndlela.
I-Polyurethane
Ama-polyurethane thickeners asetshenziswa kabanzi ekumbozweni kwezimboni asebenza kahle kakhulu futhi afanele ukusetshenziswa ezinhlelweni ezahlukene.
Ekusetshenzisweni, akukho mfuneko ku-pH yesistimu, ingafakwa ngqo noma ngemva kokuxutshwa, kungaba ngamanzi noma nge-solvent. Ezinye izithisi azinawo amandla okusebenzisa amanzi futhi azikwazi ukuxutshwa ngamanzi, kodwa zingaxutshwa kuphela nge-solvents.
uhlelo lwe-emulsion
Izinhlelo ze-emulsion (kufaka phakathi ama-emulsion e-acrylic kanye nama-emulsion e-hydroxypropyl) azinazo izinyibilikisi futhi kulula ukuzixuba. Kungcono ukuzingeza ngemva kokuxuba. Uma uxuba, ngokuya ngokusebenza kahle kokuxuba kwesixubisi, xuba isilinganiso esithile.
Uma ukusebenza kahle kokujiya kuphansi, isilinganiso sokujiya kufanele sibe phansi noma singanciphisi; uma ukusebenza kahle kokujiya kuphezulu, isilinganiso sokujiya kufanele sibe phezulu.
Isibonelo, i-SV-1540 water-based polyurethane associative thickener inamandla aphezulu okuqina. Uma isetshenziswa ohlelweni lwe-emulsion, ngokuvamile ixutshwa izikhathi eziyi-10 noma izikhathi ezingama-20 (10% noma 5%) ukuze isetshenziswe.
Ukusabalala kwe-Hydroxypropyl
I-resin yokusabalalisa i-hydroxypropyl ngokwayo iqukethe inani elithile le-solvent, futhi akulula ukuyijiya ngesikhathi senqubo yokwenza upende. Ngakho-ke, i-polyurethane ngokuvamile ingezwa ngesilinganiso esiphansi sokuxuba noma ifakwe ngaphandle kokuxuba kulolu hlobo lwesistimu.
Kuyaphawuleka ukuthi ngenxa yethonya lezinto eziningi ezincibilikisayo, umphumela wokuqina kwezinsimbi eziningi ezincibilikisayo ze-polyurethane kulolu hlobo lwesistimu awubonakali, futhi isincibilikisi esifanele sidinga ukukhethwa ngendlela eqondiwe. Lapha, ngingathanda ukuncoma isincibilikisi esihlangene se-polyurethane esisekelwe emanzini i-SV-1140, esinokusebenza kahle kakhulu kokuqina futhi esisebenza kahle kakhulu ezinhlelweni ezincibilikisayo kakhulu.
Isikhathi sokuthunyelwe: Ephreli-25-2024