Lub luag haujlwm tseem ceeb ntawm cov chaw ntub dej muaj xws li txo cov npoo av nro, txhawb kev ntub dej, thiab txhim kho qhov tsis txaus ntseeg thiab kev ruaj khov. Cov neeg sawv cev ntub dej txo cov nro ntawm cov kua, ua cov ntaub ntawv tawv tau yooj yim dua los ntawm cov kua, li kev txhim kho cov nplaum thiab permeability ntawm txheej. Hauv cov txheej txheem, cov chaw ntub dej tuaj yeem nce cov kev nro saum npoo thiab cov tshuaj pleev xim rau cov khaub noom thiab txhim kho cov nplaum ntawm cov txheej txheem.
Cov xwm txheej tshwj xeeb thiab teebmeem
Txheej txheem kev lag luam: hauv cov txheej txheem ntub dej tuaj yeem txhim kho cov txheej txheem nro thiab kev sib tw ua kom zoo dua ntub lub substrate, yog li kev txhim kho cov nplaum ntawm cov txheej txheem. Piv txwv li, substrate ntub cov tshuaj tiv thaiv tuaj yeem txhim kho lub ntub dej thiab tiv thaiv qhov tshwm sim ntawm qhov chaw qis xws li shrinkage kab noj hniav thiab shrinkage ords.
Xim Dispersion: Cov chaw nres ntoo ntub dej ua si lub luag haujlwm tseem ceeb hauv cov xim dispersion. Nws tuaj yeem txo cov kev cuam tshuam interfacial nruab nrab ntawm cov kua \/ khoom, txhim kho lub lyophilicity ntawm cov pigments thiab fillers, thiab txhim kho kev cuam tshuam kev cuam tshuam thiab kev ruaj khov. Piv txwv li, cov xim ntub thiab dispersing cov neeg sawv cev tawm cov pa ntawm cov pigments thiab fillers, txo cov av ntub thiab txhawb nqa cov pigments thiab fillers hauv cov khoom siv hauv paus.
Tshuaj tua kab: Hauv tshuaj tua kab, cov tshuaj tua pov tseg tuaj yeem ua cov dej tsis huv thiab txo cov kev cuam tshuam thiab txo cov kev tshwm sim ntawm kev ua kev tua kab. Cov neeg sawv cev ntub dej txo cov dej nro, uas pub tshuaj tua kab kom zoo dua rau cov qoob loo zoo dua rau cov qoob loo, kab thiab pathogens.
Tshuaj lom neeg tshuaj lom neeg thiab kev siv tshuab ntawm kev ua
Cov tshuaj tiv thaiv ntub dej feem ntau yog muaj ntawm ob pawg: Hydrophilic pawg thiab lipophilic pawg. Thaum nyob rau hauv kev sib cuag nrog cov chaw ruaj khov, cov lipophilic pab pawg adheres rau cov khoom saum npoo av, thiab cov khoom siv hydrophilic txuas ntxiv mus rau theem txuas ntxiv, yog li ua tiav cov nyhuv ntub. Tus nqi HLB (Hydrophile-Lipophile Sib npaug tus nqi) ntawm Tus Neeg Tsav Xwm Txheej Txheem yog ze rau nws cov nyhuv. Xaiv cov neeg sawv cev ntub dej uas phim rau tus nqi HLB HLB ntawm cov xim xim tuaj yeem txhim kho cov nyhuv txhim kho.