Namhlanje siza kugxila kwindlela yokongeza iintlobo ezithile ze-thickeners.
Iindidi ze-thickeners ezisetyenziswa ngokuqhelekileyo ziyi-inorganic, i-cellulose, i-acrylic, kunye ne-polyurethane.
Inorganic
Izinto ezingabonakaliyo ziyi-bentonite, i-silicon evuthayo, njl., eziye zongezwa ngokubanzi kwi-slurry yokugaya, kuba kunzima ukusabalalisa ngokupheleleyo ngenxa yamandla okuxuba ipeyinti eqhelekileyo.
Kukho nenxalenye encinci eya kusasazwa kwangaphambili kwaye ilungiselelwe ijeli yokusetyenziswa.
Zinokongezwa kwiipende ngokugaya ukwenza inani elithile le-pre-gel. Kukwakho nezinye ekulula ukuzisasaza kwaye zinokwenziwa zibe yijeli ngokushukumisa ngesantya esiphezulu. Ngethuba lenkqubo yokulungiselela, ukusetyenziswa kwamanzi afudumele kunokukhuthaza le nkqubo.
Iselulosi
Eyona mveliso isetyenziswa ngokuqhelekileyo cellulosici-hydroxyethyl cellulose (HEC). Ukuhamba okungahambi kakuhle kunye nokulinganisa, ukuchasana kwamanzi okwaneleyo, ukuchasana nokubunjwa kunye nezinye iimpawu, kunqabile ukuba kusetyenziswe iipende zoshishino.
Xa isetyenziswe, inokuthi ifakwe ngokuthe ngqo okanye ichithwe emanzini kwangaphambili.
Ngaphambi kokuba ungeze, kufuneka kuhlawulwe ingqalelo ekulungiseni i-pH yenkqubo kwiimeko ze-alkaline, ehambelana nokuphuhliswa kwayo ngokukhawuleza.
acrylic
I-Acrylic thickeners inezicelo ezithile kwiipende zoshishino. Isetyenziswa kakhulu kwiingubo eziqhelekileyo eziqhelekileyo ezifana necandelo elilodwa kunye nomlinganiselo ophezulu we-pigment-to-base, njengezakhiwo zetsimbi kunye nezixhobo zokukhusela.
Kwi-topcoat (ingakumbi i-topcoat ecacileyo), i-two-component, i-varnish yokubhaka, ipeyinti ye-gloss ephezulu kunye nezinye iinkqubo, ineziphene kwaye ayikwazi ukufaneleka ngokupheleleyo.
Umgaqo wokuqina we-acrylic thickener kukuba: iqela le-carboxyl kwikhonkco le-polymer liguqulwa libe yi-ionized carboxylate phantsi kweemeko ze-alkaline, kwaye umphumo wokuqina uphunyezwa ngokugxothwa kwe-electrostatic.
Ngoko ke, i-pH yenkqubo kufuneka ilungiswe kwi-alkaline ngaphambi kokusetyenziswa, kwaye i-pH kufuneka igcinwe kwi> 7 ngexesha lokugcinwa okulandelayo.
Ingongezwa ngokuthe ngqo okanye ihlanjululwe ngamanzi.
Inokuchithwa kwangaphambili ukuze isetyenziswe kwezinye iinkqubo ezifuna uzinzo oluphezulu lwe-viscosity. Oko kukuthi: okokuqala nciphisa i-acrylic thickener ngamanzi, kwaye wongeze isilungelelaniso se-pH ngelixa uvuselela. Ngeli xesha, isisombululo siyaqina ngokucacileyo, ukusuka kwi-milky emhlophe ukuya kwi-paste ebonakalayo, kwaye inokushiywa ukuba imele ukusetyenziswa kamva.
Ukusebenzisa le ndlela kubingelela ukusebenza kakuhle kokuqina, kodwa kunokwandisa ngokupheleleyo i-thickener kwisigaba sokuqala, esilungele ukuzinza kwe-viscosity emva kokuba ipeyinti yenziwe.
Kwinkqubo yokuqulunqwa kunye nokuveliswa kwe-H1260 yamanzi-based based one-component yesilivere yepeyinti yepowder, i-thickener isetyenziswe ngale ndlela.
Polyurethane
I-polyurethane thickeners isetyenziswa ngokubanzi kwiingubo zamashishini ezinomsebenzi ogqwesileyo kwaye zifanelekile ukusetyenziswa kwiinkqubo ezahlukeneyo.
Kwisicelo, akukho mfuneko kwi-pH yenkqubo, inokudibaniswa ngokuthe ngqo okanye emva kokuhlanjululwa, mhlawumbi ngamanzi okanye i-solvent. Ezinye ii-thickeners zine-hydrophilicity engalunganga kwaye ayinakuxutywa ngamanzi, kodwa inokuxutywa kuphela ngezinyibilikisi.
inkqubo ye-emulsion
Iinkqubo ze-emulsion (kubandakanywa i-emulsions ye-acrylic kunye ne-emulsions ye-hydroxypropyl) ayinayo i-solvents kwaye kulula ukuyijika. Kungcono ukuzongeza emva kokuhlanjululwa. Xa uhlambulula, ngokuhambelana nokusebenza kakuhle kwe-thickener, nciphisa umlinganiselo othile.
Ukuba ukusebenza kakuhle kokuqina kuphantsi, umlinganiselo we-dilution kufuneka ube ngaphantsi okanye ungahlanjululwa; ukuba ukusebenza kokuqina kuphezulu, i-dilution ratio kufuneka ibe phezulu.
Umzekelo, i-SV-1540 yamanzi esekelwe kwi-polyurethane associative thickener inomgangatho ophezulu wokuqina. Xa isetyenziswe kwinkqubo ye-emulsion, ngokuqhelekileyo ihlanjululwe ngamaxesha angama-10 okanye amaxesha angama-20 (10% okanye i-5%) yokusetyenziswa.
Ukusasazwa kweHydroxypropyl
I-Hydroxypropyl dispersion resin ngokwayo iqulethe umlinganiselo othile we-solvent, kwaye akulula ukujiya ngexesha lenkqubo yokwenza ipeyinti. Ngoko ke, i-polyurethane yongezwa ngokubanzi kwi-dilution ratio ephantsi okanye yongezwa ngaphandle kokuhlanjululwa kolu hlobo lwenkqubo.
Kuyafaneleka ukuba uqaphele ukuba ngenxa yempembelelo yesixa esikhulu se-solvents, isiphumo sokuqina sabaninzi be-polyurethane thickeners kulolu hlobo lwenkqubo alubonakali, kwaye i-thickener efanelekileyo kufuneka ikhethwe ngendlela ejoliswe kuyo. Apha, ndingathanda ukucebisa i-SV-1140 yamanzi esekelwe kwi-polyurethane associative thickener, enomgangatho ophezulu kakhulu wokuqina kwaye inomsebenzi obalaseleyo kwiinkqubo zokunyibilika okuphezulu.
Ixesha lokuposa: Apr-25-2024