Namuhla sizogxila endleleni yokwengeza izinhlobo ezithile zama-thickeners.
Izinhlobo zama-thickeners asetshenziswa kakhulu ikakhulukazi i-inorganic, i-cellulose, i-acrylic, ne-polyurethane.
I-Inorganic
Izinto ezingaphili ngokuyinhloko ziyi-bentonite, i-silicon evuthayo, njll, evame ukungezwa ku-slurry yokugaya, ngoba kunzima ukuyihlakaza ngokuphelele ngenxa yamandla avamile okuxuba upende.
Kukhona nengxenye encane ezohlakazwa ngaphambili futhi ilungiswe ibe ijeli ukuze isetshenziswe.
Zingangezwa kumapende ngokugaya ukwenza inani elithile le-pre-gel. Kukhona futhi okulula ukuhlakazeka futhi kungenziwa ijeli ngokushukumisa isivinini esikhulu. Phakathi nenqubo yokulungiselela, ukusetshenziswa kwamanzi afudumele kungakhuthaza le nqubo.
I-Cellulose
Umkhiqizo osetshenziswa kakhulu we-cellulosic ngui-hydroxyethyl cellulose (HEC). Ukugeleza okungalungile kanye nokulingana, ukumelana kwamanzi okwanele, ukulwa nesikhunta nezinye izakhiwo, akuvamile ukusetshenziselwa upende wezimboni.
Uma isetshenziswa, ingafakwa ngokuqondile noma ichithwe emanzini kusengaphambili.
Ngaphambi kokwengeza, ukunakwa kufanele kukhokhwe ekulungiseni i-pH yesistimu ezimweni ze-alkaline, ehambisana nokuthuthukiswa kwayo ngokushesha.
I-Acrylic
Ama-thickeners e-Acrylic anezicelo ezithile kumapende wezimboni. Isetshenziswa kakhulu ekugqokeni okujwayelekile okufana nengxenye eyodwa kanye nesilinganiso esiphezulu se-pigment-to-base, njengezakhiwo zensimbi kanye neziqalo ezivikelayo.
Ku-topcoat (ikakhulukazi i-topcoat ecacile), izingxenye ezimbili, i-varnish yokubhaka, upende we-high-gloss nezinye izinhlelo, inokukhubazeka okuthile futhi ayikwazi ukusebenza ngokugcwele.
Umgomo wokujiya we-acrylic thickener uthi: iqembu le-carboxyl echungechungeni lwe-polymer liguqulwa libe i-carboxylate ionized ngaphansi kwezimo ze-alkali, futhi umphumela wokujiya utholakala ngokuxoshwa kwe-electrostatic.
Ngakho-ke, i-pH yesistimu kufanele ilungiswe ibe yi-alkaline ngaphambi kokusetshenziswa, futhi i-pH kufanele futhi igcinwe ku->7 ngesikhathi sokugcinwa okulandelayo.
Inganezelwa ngokuqondile noma ihlanjululwe ngamanzi.
Ingancibilika ngaphambili ukuze isetshenziswe kwezinye izinhlelo ezidinga ukuzinza kwe-viscosity ephezulu. Okungukuthi: okokuqala hlambulula i-acrylic thickener ngamanzi, bese wengeza isilungisi se-pH ngenkathi ushukumisa. Ngalesi sikhathi, ikhambi liyajiya ngokusobala, lisuka ku-milky white kuya kokunamathisela obala, futhi lingashiywa ukuze lime ukuze lisetshenziswe kamuva.
Ukusebenzisa le ndlela kudela ukusebenza kahle kokuqina, kodwa kungandisa ngokugcwele i-thickener ekuqaleni, okuhambisana nokuzinza kwe-viscosity ngemuva kokwenziwa kopende.
Ekubunjweni nasekukhiqizeni upende we-H1260 osekelwe emanzini oyingxenye eyodwa yesiliva ye-powder, i-thickener isetshenziswa ngale ndlela.
I-polyurethane
Ama-thickeners e-polyurethane asetshenziswa kakhulu ekugqokeni kwezimboni ngokusebenza okuhle kakhulu futhi afanele ukusetshenziswa ezinhlelweni ezihlukahlukene.
Ekufakeni isicelo, asikho isidingo ku-pH yohlelo, ingangezwa ngokuqondile noma ngemva kokuhlanjululwa, kungaba ngamanzi noma nge-solvent. Amanye ama-thickeners ane-hydrophilicity embi futhi awakwazi ukuhlanjululwa ngamanzi, kodwa angahlanjululwa kuphela ngama-solvents.
uhlelo lwe-emulsion
Ama-emulsion systems (okuhlanganisa ama-emulsions e-acrylic nama-hydroxypropyl emulsions) awaqukethe ama-solvents futhi kulula ukujiya. Kungcono ukuwengeza ngemuva kokuhlanjululwa. Lapho uhlanza, ngokusho kokuqina kokuqina kwe-thickener, nciphisa isilinganiso esithile.
Uma ukusebenza kahle kokuqina kuphansi, isilinganiso se-dilution kufanele sibe phansi noma singahlanjululwa; uma ukusebenza kahle kokuqina kuphezulu, isilinganiso se-dilution kufanele sibe phezulu.
Isibonelo, i-SV-1540 ye-polyurethane associative associative thickener ye-SV-1540 inamandla aphezulu okuqina. Uma isetshenziswa ohlelweni lwe-emulsion, ngokuvamile ihlanjululwa izikhathi ezingu-10 noma izikhathi ezingu-20 (10% noma 5%) ukuze isetshenziswe.
IHydroxypropyl Dispersion
I-Hydroxypropyl dispersion resin ngokwayo iqukethe inani elithile le-solvent, futhi akulula ukujiya ngesikhathi sokwenza upende. Ngakho-ke, i-polyurethane ngokuvamile yengezwa ngesilinganiso esiphansi se-dilution noma yengezwe ngaphandle kokuhlanjululwa kulolu hlobo lwesistimu.
Kuyaphawuleka ukuthi ngenxa yethonya lesamba esikhulu se-solvents, umphumela wokuqina we-polyurethane thickeners kulolu hlobo lwesistimu awubonakali, futhi i-thickener efanelekile idinga ukukhethwa ngendlela ehlosiwe. Lapha, ngingathanda ukuncoma i-SV-1140 yamanzi esekelwe ku-polyurethane associative thickener, enokusebenza kahle kakhulu kokuqina futhi esebenza kahle kakhulu ezinhlelweni zokuncibilika okuphezulu.
Isikhathi sokuthumela: Apr-25-2024