Daim ntawv thov ntawmCov hmoov latex uas yaj tau dua (RDP) Hauv cov qauv hmoov putty tau txais kev saib xyuas hauv kev tsim kho thiab kev lag luam khoom siv hauv tsev vim nws muaj feem cuam tshuam loj rau cov khoom ntawm cov khoom kawg. Cov hmoov latex redispersible yog cov hmoov polymer uas muaj peev xwm tsim cov dispersions thaum sib xyaw nrog dej. Cov dispersions no muab ntau yam zoo rau cov putty, suav nrog kev txhim kho adhesion, kev ywj pheej, kev tiv thaiv dej, thiab, qhov tseem ceeb, cov txheej txheem hardening.
To taub Putty Hmoov thiab Redispersible Latex Hmoov
Hmoov putty yog ib yam khoom ua los ntawm hmoov zoo uas siv rau kev sau cov qhov sib txawv, ua kom cov nplaim du, thiab npaj cov khoom siv rau kev pleev xim lossis lwm yam tiav. Cov khoom xyaw tseem ceeb ntawm hmoov putty feem ntau muaj cov khoom sib txuas (piv txwv li, cement, gypsum), cov khoom sib xyaw (piv txwv li, talc, calcium carbonate), thiab cov khoom ntxiv (piv txwv li, cov tshuaj qeeb qeeb, cov khoom ua kom nrawm) uas tswj nws cov yam ntxwv ua haujlwm. Thaum sib xyaw nrog dej, cov hmoov putty ua cov nplaum uas tawv dhau sijhawm, tsim kom muaj qhov chaw ruaj khov thiab du.
Cov hmoov latex uas yaj tau dua (RDP) yog cov hmoov polymer uas yaj tau hauv dej uas ua los ntawm kev txau cov dej ntawm cov polymer emulsions. Cov polymers feem ntau siv hauv RDP suav nrog styrene-butadiene (SBR), acrylics, thiab vinyl acetate-ethylene (VAE). Kev ntxiv RDP rau hauv cov hmoov putty ua rau cov khoom siv lub cev thiab lub cev ntawm cov putty kho zoo dua, feem ntau los ntawm kev txhim kho lub zog sib txuas, kev ywj pheej, thiab kev tiv thaiv kev tawg.
Kev ua kom tawv ntawm hmoov putty
Qhov ua kom cov hmoov putty tawv tshwm sim thaum cov khoom sib txuas (xws li cement lossis gypsum) dhau los ua tshuaj lom neeg nrog dej. Cov txheej txheem feem ntau hu ua hydration (rau cov cement-based putties) lossis crystallization (rau gypsum-based putties), thiab nws ua rau muaj cov khoom khov uas tawv dhau sijhawm. Txawm li cas los xij, cov txheej txheem no tuaj yeem cuam tshuam los ntawm ntau yam, xws li qhov muaj cov khoom ntxiv, av noo, kub, thiab cov khoom sib xyaw ntawm cov putty nws tus kheej.
Lub luag haujlwm ntawm RDP hauv cov txheej txheem hardening no yog los txhim kho kev sib txuas ntawm cov khoom me me, txhim kho kev ywj pheej, thiab tswj kev evaporation ntawm dej. RDP ua haujlwm ua ib qho binder uas, thaum rov tawg dua hauv dej, tsim ib lub network polymeric hauv putty. Lub network no pab ntes cov dej molecules ntev dua, qeeb qeeb ntawm kev evaporation thiab yog li ntev lub sijhawm ua haujlwm ntawm putty. Tsis tas li ntawd, lub network polymer pab tsim ib lub cev muaj zog dua, sib koom ua ke los ntawm kev txhim kho kev sib cuam tshuam ntawm cov khoom me me.
Kev Cuam Tshuam ntawm Cov Hmoov Latex Uas Rov Faib Tau Dua rau Cov Txheej Txheem Ua Kom Ruaj Khov
Kev Ua Haujlwm Zoo Dua thiab Lub Sijhawm Qhib:
Qhov kev suav nrog RDP hauv cov qauv putty ua rau kev ua haujlwm yooj yim dua los ntawm kev qeeb qeeb cov txheej txheem ziab, muab sijhawm ntau dua rau kev siv. Qhov no yog qhov tshwj xeeb tshaj yog rau cov haujlwm loj uas cov putty yuav tsum tau nthuav dav rau ntau thaj chaw ua ntej nws teeb tsa.
Kev Ywj Pheej Ntau Ntxiv:
Ib qho ntawm cov txiaj ntsig tseem ceeb ntawm kev ntxiv RDP yog kev txhim kho hauv kev ywj pheej. Txawm hais tias cov putty ib txwm muaj feem yuav tawg thaum tawv, RDP pab ua rau cov khoom siv kho tau yooj yim dua, txo qhov yuav tawg thaum muaj kev ntxhov siab lossis kev hloov pauv kub.
Lub zog thiab kev ruaj khov:
Cov putties uas hloov kho RDP muaj zog dua thiab tiv taus kev hnav thiab tsim kua muag piv rau cov qauv tsis hloov kho. Qhov no yog vim muaj cov polymer matrix uas ua kom cov qauv ntawm cov putty tawv khov kho.
Txo Qhov Ntsws:
Cov polymeric network uas tsim los ntawm cov hmoov latex uas rov ua dua tshiab kuj pab txo qhov ntsws thaum lub sijhawm kho. Qhov no tseem ceeb heev rau kev tiv thaiv kev tsim cov kab nrib pleb, uas tuaj yeem ua rau kev ua haujlwm thiab kev zoo nkauj ntawm cov putty puas tsuaj.
Kev Tiv Thaiv Dej:
Cov hmoov putty sib xyaw nrog cov hmoov latex uas yaj tau dua feem ntau yuav tiv taus dej ntau dua. Cov hmoov latex ua ib txheej hydrophobic hauv cov putty, ua rau cov khoom kho kom zoo tsis yooj yim nqus dej thiab, yog li ntawd, zoo dua rau kev siv sab nraud.
Kev siv cov hmoov latex uas tawg tau dua tshiab rau hauv cov qauv putty ua rau nws cov khoom zoo dua, tshwj xeeb tshaj yog thaum lub sijhawm ua kom tawv. Cov txiaj ntsig tseem ceeb ntawm RDP suav nrog kev ua haujlwm tau zoo dua, kev ywj pheej zoo dua, lub zog thiab kev ruaj khov ntau dua, txo qhov ntsws, thiab tiv taus dej zoo dua. Cov kev txhim kho no ua rau RDP-modified putties tsim nyog dua rau kev siv sab hauv thiab sab nraud, muab lub neej ntev dua thiab kev ua haujlwm zoo dua nyob rau hauv ntau yam xwm txheej ib puag ncig.
Rau cov kws tshaj lij kev tsim kho thiab cov chaw tsim khoom, kev siv covhmoov latex uas yaj tau dua tshiab muab ib txoj hauv kev yooj yim tab sis zoo los txhim kho cov yam ntxwv ntawm cov hmoov putty ib txwm muaj, ua rau cov khoom yooj yim dua rau kev siv, ruaj khov dua, thiab tsis tshua muaj kev tawg lossis ntsws dhau sijhawm. Los ntawm kev ua kom zoo dua cov mis nrog RDP, cov hmoov putty ua rau muaj ntau yam, nrog rau kev ua tau zoo dua hauv kev nplaum, tawv, thiab tiv taus cov huab cua.
Lub sijhawm tshaj tawm: Lub Peb Hlis-20-2025