Lub hauv paus ntsiab lus tom qab cov neeg ua npuas dej yog nyob rau hauv lawv lub peev xwm los txo qhov nro ntawm cov kua los ntawm kev siv cov surfactants, yog li ua kom cov roj ua npuas ruaj khov hauv cov kua nruab nrab. Surfactant molecules muaj ob qhov xwm txheej- ua hydrophilic ntawm ib kawg thiab lipophilic ntawm lwm qhov. Thaum cov pa nkag mus rau hauv cov kua (piv txwv li, los ntawm kev ntxhov siab lossis kev txhaj tshuaj cua), cov surfactant molecules adsorb rau cov pa roj - kua interface ntawm cov npuas. Qhov no adsorption txo qis qhov nro ntawm cov npuas, ua kom yooj yim rau lawv tsim thiab tiv thaiv lawv los ntawm rupturing ntxov ntxov. Cov txheej txheem no yog lub hauv paus ntawm tus neeg sawv cev foaming qhov kev ua thiab sawv cev rau nws lub luag haujlwm tseem ceeb. Cov khoom sib xyaw ua ke thiab cov thickening cov neeg ua haujlwm sib xyaw ua ke hauv foaming formulations pab ntxiv txhim khu kev ruaj ntseg ua npuas ncauj. Cov khoom xws li cov proteins, polysaccharides, lossis xanthates ua rau cov viscosity ntawm cov kua nruab nrab, yog li cuam tshuam cov coalescence thiab tom qab tawg ntawm npuas raug tshem tawm hauv nws. Concurrently, cov tshuaj no tsim ib tug nyias zaj duab xis nyob rau hauv lub npuas nto, uas ua raws li ib tug barrier rau roj khiav; Cov txheej txheem no txuas ntxiv cov npuas dej lub neej thiab xyuas kom meej tias cov npuas dej tseem zoo -textured thiab ruaj khov. Lub hauv paus ntsiab lus no yog qhov tseem ceeb hauv kev tsim cov khoom noj khoom haus, tshuaj pleev ib ce, thiab cov tshuaj ntxuav.
Cov yam ntxwv tshwj xeeb ntawm cov npuas dej kuj tseem txuas nrog kev ruaj ntseg ntawm cov pa roj -kua interface. Los ntawm kev kho qhov tsis zoo xws li surfactant concentration, kua viscosity, thiab qhov sib piv ntawm cov khoom siv sib xyaw ua ke, cov neeg ua npuas dej ua kom muaj kev tswj hwm ntawm cov khoom ua npuas ncauj -xws li npuas loj, ntom, thiab kav ntev. Hauv qhov no, cov neeg ua npuas dej tsis yog tsuas yog ua haujlwm txhawm rau txhim kho qhov pom kev pom thiab tactile zoo ntawm cov khoom, tab sis kuj ua kom muaj kev ua haujlwm zoo thiab kev ruaj ntseg hauv ntau yam kev lag luam thiab khoom noj khoom haus- hais txog kev siv.
