Defoaming yog lub peev xwm ntawm cov txheej txheem los tshem tawm cov npuas dej thaum lub sijhawm tsim khoom thiab txheej txheej.Defoamersyog ib hom additive siv los txo cov npuas dej thaum lub sij hawm tsim khoom thiab/los yog daim ntawv thov txheej. Yog li dab tsi cuam tshuam rau defoaming ntawm coatings?
1. Nto nro
Qhov nro ntawm cov txheej txheej muaj qhov cuam tshuam zoo rau lub defoamer. Qhov nro ntawm lub defoamer yuav tsum qis dua li ntawm cov txheej, txwv tsis pub nws yuav tsis tuaj yeem defoam thiab inhibit ua npuas ncauj. Qhov nro ntawm cov txheej txheej yog qhov sib txawv, yog li thaum xaiv lub defoamer, qhov nro tas li thiab qhov sib txawv ntawm qhov sib txawv ntawm qhov system yuav tsum raug txiav txim siab.
2. Lwm yam additives
Feem ntau cov surfactants siv nyob rau hauv txheej yog ua haujlwm tsis zoo nrog defoamers. Tshwj xeeb, emulsifiers, wetting thiab dispersing agents, leveling agents, thickeners, thiab lwm yam yuav cuam tshuam cov nyhuv ntawm defoamers. Yog li ntawd, thaum sib txuas ntau yam additives, peb yuav tsum xyuam xim rau kev sib raug zoo ntawm cov additives sib txawv thiab xaiv ib tug zoo tshuav point.
3. Kev kho kom zoo
Thaum cov xim nkag mus rau qhov kub-kub ci ntawm chav tsev kub, viscosity yuav poob sai sai thiab cov npuas tuaj yeem txav mus rau saum npoo. Txawm li cas los xij, vim yog qhov volatilization ntawm cov kuab tshuaj, kho cov xim, thiab qhov nce hauv qhov viscosity, cov npuas dej hauv cov xim yuav ruaj khov dua, yog li raug daig rau ntawm qhov chaw, ua rau lub qhov txhab thiab cov pinholes. Yog li ntawd, qhov kub thiab txias, curing ceev, hnyav volatilization tus nqi, thiab lwm yam kuj cuam tshuam cov nyhuv defoaming.
4. Cov ntsiab lus ruaj khov, viscosity, thiab elasticity ntawm cov txheej
High-tawv tuab txheej, high-viscosity coatings, thiab high-elasticity txheej yog txhua yam nyuaj heev rau defoam. Muaj ntau yam uas tsis tsim nyog rau defoaming, xws li qhov nyuaj ntawm defoamers rau diffuse nyob rau hauv cov coatings, qeeb tus nqi ntawm microbubbles tig mus rau hauv macrobubbles, txo lub peev xwm ntawm foams mus rau qhov chaw, thiab siab viscoelasticity ntawm foams. Cov npuas dej hauv cov txheej txheem no yog qhov nyuaj rau kev tshem tawm, thiab nws yog ib qho tsim nyog los xaiv cov defoamers thiab deaerators siv ua ke.
5. Txheej txheej thiab kev tsim kho kub
Muaj ntau txoj kev siv txheej txheej, nrog rau txhuam, cov menyuam txheej, nchuav, khawb, txau, tshuaj ntsuam luam ntawv, thiab lwm yam. Cov txheej txheem foaming ntawm txheej txheej siv txheej txheej txheej kuj txawv. Txhuam thiab cov menyuam txheej ua npuas ncauj ntau dua li txau thiab khawb. Tsis tas li ntawd, qhov chaw tsim kho nrog qhov kub thiab txias ua npuas ntau tshaj qhov uas tsis muaj qhov kub thiab txias, tab sis cov npuas dej kuj yooj yim dua los tshem tawm ntawm qhov kub thiab txias.
Post lub sij hawm: May-09-2025