Namhlanje siza kugxila kwindlela yokongeza iintlobo ezithile zezinto eziqinisayo.
Iindidi zezithambisi ezisetyenziswa rhoqo zii-inorganic, cellulose, acrylic, kunye ne-polyurethane.
Izinto ezingaphiliyo
Izinto ezingaphiliyo ikakhulu yi-bentonite, i-fumed silicon, njl.njl., ezihlala zongezwa kwi-slurry ukuze zigaywe, kuba kunzima ukuzisasaza ngokupheleleyo ngenxa yamandla okuxuba ipeyinti aqhelekileyo.
Kukwakho nenxalenye encinci eza kusasazeka kwangaphambili ize ilungiswe ibe yijeli ukuze isetyenziswe.
Zingongezwa kwiipeyinti ngokuzigaya ukuze kwenziwe ubungakanani obuthile bejeli yangaphambi kokusetyenziswa. Kukwakho nezinye ezilula ukuzisasaza kwaye zingenziwa ijeli ngokuzixuba ngesantya esiphezulu. Ngexesha lenkqubo yokulungiselela, ukusetyenziswa kwamanzi afudumeleyo kunokukhuthaza le nkqubo.
I-Cellulose
Eyona mveliso ye-cellulosic esetyenziswa kakhulu yii-hydroxyethyl cellulose (HEC). Ukugeleza kwamanzi kunye nokungalingani kakuhle, ukumelana namanzi okwaneleyo, ukuchasana nokungunda kunye nezinye iimpawu, ayisetyenziswa rhoqo kwiipeyinti zemizi-mveliso.
Xa isetyenziswa, ingongezwa ngokuthe ngqo okanye inyibilikiswe emanzini kwangaphambili.
Ngaphambi kokuba wongeze, kufuneka kuqwalaselwe ukulungisa i-pH yenkqubo kwiimeko ze-alkaline, nto leyo enceda ekuphuhlisweni kwayo ngokukhawuleza.
I-Acrylic
Izithambisi ze-acrylic zinezicelo ezithile kwiipeyinti zemizi-mveliso. Zisetyenziswa kakhulu kwiingubo eziqhelekileyo ezifana ne-single component kunye ne-pigment-to-base ratio ephezulu, njengezakhiwo zentsimbi kunye nee-primer ezikhuselayo.
Kwi-topcoat (ingakumbi i-clear topcoat), enezakhi ezimbini, i-baking varnish, ipeyinti ekhazimlayo kunye nezinye iinkqubo, ineziphene ezithile kwaye ayinakusebenza ngokupheleleyo.
Umgaqo wokuqina kwe-acrylic thickener ngulo: iqela le-carboxyl kwi-polymer chain liguqulwa libe yi-ionized carboxylate phantsi kweemeko ze-alkaline, kwaye isiphumo sokuqina sifezekiswa ngokugxothwa kwe-electrostatic.
Ngoko ke, i-pH yenkqubo kufuneka ilungiswe ibe yi-alkaline ngaphambi kokuba isetyenziswe, kwaye i-pH nayo kufuneka igcinwe kwi->7 ngexesha lokugcina okulandelayo.
Ingongezwa ngokuthe ngqo okanye ixutywe ngamanzi.
Inganyibilikiswa kwangaphambili ukuze isetyenziswe kwezinye iinkqubo ezifuna uzinzo oluphezulu lwe-viscosity. Oko kukuthi: okokuqala xuba i-acrylic thickener ngamanzi, uze wongeze i-pH adjuster ngelixa uxuba. Ngeli xesha, isisombululo siyaqina ngokucacileyo, ukusuka kumhlophe omhlophe ukuya kwi-transparent paste, kwaye singashiywa sime ukuze sisetyenziswe kamva.
Ukusebenzisa le ndlela kuyayinciphisa impumelelo yokuqina, kodwa inokwandisa ngokupheleleyo i-thickener kwisigaba sokuqala, nto leyo enceda ekuzinzeni kwe-viscosity emva kokuba ipeyinti yenziwe.
Kwinkqubo yokwenza nokuvelisa ipeyinti yesilivere esekwe emanzini i-H1260 enenxalenye enye, i-thickener isetyenziswa ngale ndlela.
I-Polyurethane
Izithambisi zepolyurethane zisetyenziswa kakhulu kwiingubo zoshishino ezisebenza kakuhle kwaye zifanelekile ukusetyenziswa kwiinkqubo ezahlukeneyo.
Xa isetyenziswa, akukho mfuneko kwi-pH yenkqubo, ingongezwa ngokuthe ngqo okanye emva kokuxutywa, nokuba ngamanzi okanye isinyibilikisi. Ezinye izinyibilikisi azinawo amandla okusebenzisa amanzi kakuhle kwaye azinakuxutywa ngamanzi, kodwa zinokuxutywa kuphela ngezinyibilikisi.
inkqubo ye-emulsion
Iinkqubo ze-emulsion (kuquka ii-emulsion ze-acrylic kunye nee-emulsion ze-hydroxypropyl) azinazo izinyibilikisi kwaye kulula ukuziqinisa. Kungcono ukuzidibanisa emva kokuzinyibilikisa. Xa uxuba, ngokwendlela esebenza ngayo i-thickener, xuba umlinganiselo othile.
Ukuba ukusebenza kakuhle kokutyeba kuphantsi, umlinganiselo wokutyeba kufuneka ube phantsi okanye unganciphiswanga; ukuba ukusebenza kakuhle kokutyeba kuphezulu, umlinganiselo wokutyeba kufuneka ube phezulu.
Umzekelo, i-SV-1540 water-based polyurethane associative thickener inokusebenza kakuhle kokuqina. Xa isetyenziswa kwinkqubo ye-emulsion, idla ngokuxutywa izihlandlo ezili-10 okanye ezingama-20 (10% okanye 5%) ukuze isetyenziswe.
Ukusasazeka kweHydroxypropyl
I-resin ye-hydroxypropyl dispersion ngokwayo inomlinganiselo othile we-solvent, kwaye akulula ukuyenza ibe nkulu ngexesha lenkqubo yokwenza ipeyinti. Ke ngoko, i-polyurethane ngokubanzi yongezwa kwi-dilution ratio ephantsi okanye yongezwe ngaphandle kwe-dilution kolu hlobo lwenkqubo.
Kubalulekile ukuqaphela ukuba ngenxa yempembelelo yobuninzi bezinyibilikisi, isiphumo sokuqina kwezixhobo ezininzi zokuqinisa i-polyurethane kolu hlobo lwenkqubo asibonakali, kwaye isixhobo sokuqina esifanelekileyo kufuneka sikhethwe ngendlela ejolise kuyo. Apha, ndingathanda ukucebisa isixhobo sokuqina se-polyurethane esisekelwe emanzini i-SV-1140, esisebenza kakuhle kakhulu ekuqinisweni kwaye sisebenza kakuhle kwiinkqubo ezinyibilikayo.
Ixesha leposi: Epreli-25-2024