Daim ntawv thov ntawmRedispersible looj hmoov (RDP) Hauv cov hmoov ua kom muaj hmoov muaj kev ua kom zoo nkauj hauv kev tsim kho thiab cov ntaub ntawv tsim kev lag luam vim nws qhov cuam tshuam tseem ceeb ntawm cov khoom ntawm cov khoom kawg. Redispersible looj hmoov yog qhov tseem ceeb polymer hmoov uas muaj peev xwm tsim kev sib cais thaum sib xyaw nrog dej. Cov kev faib tawm no los muab cov yam ntxwv zoo rau ntau yam, nrog rau kev ua kom zoo dua, dej tsis kam, thiab, kev tsis ncaj ncees, cov txheej txheem tawv.
Nkag siab putty hmoov thiab redispersible looj hmoov
Putty hmoov yog cov khoom zoo-raws li cov khoom siv uas tau siv rau kev sau cov khoob, thiab kev npaj substrates rau kev pleev xim lossis lwm yam tag nrho. Qhov yooj yim sib xyaw ua ke ntawm cov hmoov putty feem ntau suav nrog cov hlua khi (piv txwv li, copsum), thiab cov roj av (piv txwv li, accelerers) uas tswj tau nws cov khoom ua haujlwm. Thaum sib xyaw nrog dej, cov hmoov ua kom muaj cov hmoov nplej ua ib cov tshuaj txhuam uas nyuaj rau lub sijhawm, tsim lub sijhawm ruaj khov, du nto.
Redispersible looj hmoov (RDP) yog dej-soluble polymer hmoov ua los ntawm tshuaj tsuag dispersions ntawm polymer emulsions. Cov polymers siv hauv RDP suav nrog Styrene-Butadiene (SBR), Acrylics, thiab Vae). Qhov sib ntxiv ntawm RDP kom muaj hmoov rau cov hmoov thiab cov kws kho tshuab ntawm kev kho tau putty, feem ntau los ntawm kev txhim kho cov nyiaj sib khi, yoog raws, thiab kev tiv thaiv kom tawg.
Hardening ntawm putty hmoov
Lub zog tawv ntawm cov hmoov putty tshwm sim li cov phau ntawv khi (zoo li cement lossis gypsum) yauv mus rau cov dej tshuaj lom neeg. Cov txheej txheem feem ntau yog siv cov dej haus (rau cov cement-based putties) lossis crystallization (rau gypsum-based putties uas nyuaj dhau sijhawm. Txawm li cas los xij, cov txheej txheem no tuaj yeem cuam tshuam los ntawm ntau yam ntawm cov yam, xws li muaj cov ntxiv, av noo, thiab muaj pes tsawg leeg, thiab cov muaj pes tsawg leeg, thiab kev sib xyaw ua ke ntawm lub putty nws tus kheej.
Lub luag haujlwm ntawm RDP hauv cov txheej txheem tawv tawv no yog txhawm rau txhim kho txoj kev sib txuas ntawm cov hais, txhim kho kev hloov pauv, thiab tswj cov dej evaporation. RDP muaj nuj nqi raws li phau ntawv uas, ib zaug liab hauv dej, ua ib tus polymeric network nyob rau hauv putty. Lub network no pab cuab cov dej lwg me me, maj mam txo tus nqi ntawm evaporation thiab li no ncua sij hawm ua haujlwm ntawm lub sij hawm putty. Ib qho ntxiv, cov polymer network pab ua kom muaj zog dua, ntau cohesive hardened loj los ntawm kev txhim kho cov kev sib txuam.
Kev cuam tshuam ntawm recispersible looj hmoov rau ntawm cov txheej txheem tawv tawv
Txhim kho lub zog ua haujlwm thiab qhib lub sijhawm:
Kev suav nrog RDP hauv kev ua kom muaj zog hauv kev ua haujlwm los ntawm kev ua haujlwm los ntawm kev ua kom tiav cov txheej txheem ziab, muab sijhawm ntau rau kev thov. Qhov no yog tau txais txiaj ntsig tshwj xeeb hauv cov phiaj xwm loj uas cov putty xav tau kis dhau thaj chaw ntau heev ua ntej nws teeb tsa.
Nce txau:
Ib qho ntawm cov kev cuam tshuam loj ntawm kev ntxiv RDP yog kev txhim kho hauv kev hloov pauv tau. Thaum cov tsoos tsoos ua rau muaj nkig thaum ua kom tawv nqaij tawv, RDP pab txhawb cov khoom siv kho tau yooj yim, txo qis kev tawg ntawm kev ntxhov siab lossis kub hloov.
Lub zog thiab durability:
RDP-Hloov PuTard nthuav tawm ntau dua compressive lub zog thiab kuj yuav tsum hnav thiab kua muag piv rau cov qauv tsis hloov tshiab. Qhov no yog vim kev tsim cov polymer matrix uas txhawb cov qauv txheej txheem kev ntseeg ntawm cov tawv nqaij tawv.
Txo shrinkage:
Cov polymeric network tsim los ntawm Redispersible looj hmoov kuj tseem pab tau txo qis shrinkage thaum lub sij hawm kho. Qhov no yog ib qho tseem ceeb tshwj xeeb hauv kev tiv thaiv kev tsim cov nrib pleb, uas tuaj yeem cuam tshuam kev ua tau zoo thiab ua kom zoo nkauj ntawm lub putty.
Dej Tsis kam:
Putty hmoov sib xyaw nrog redispersible looj hmoov zoo li muaj dej ntau. Cov kab txuas ntawm cov tshuaj yas ua cov khoom siv hydrophobic tsis pub dhau qhov kev nqus dej tsis yooj yim rau cov dej nqus thiab, yog li ntawd, zoo dua rau cov kev siv sab nrauv.
Kev sib xyaw ua ke recispersible looj cov hmoov rau hauv cov qauv sib xyaw ua kom zoo tshaj nws cov peev txheej, tshwj xeeb yog thaum lub sijhawm ua kom tawv nqaij tawv. Cov txiaj ntsig tseem ceeb ntawm RDP suav nrog kev txhim kho kev ua haujlwm, nce lub zog thiab durability, thiab dej tsis kam tsis zoo. Cov kev txhim kho no ua rau RDP-hloov pauv cov putties ntau haum rau ob daim ntawv thov sab hauv thiab sab nrauv, muab ntau dua kev ua haujlwm ntev thiab kev ua tau zoo nyob rau hauv ib puag ncig ib puag ncig.
Rau cov kws kho mob thiab cov tuam ntxhab, kev siv ntawmredispersible looj hmoov Muaj txoj kev yooj yim tau yooj yim los hloov kho cov khoom ntawm cov hmoov txhuv nplej uas muaj peev xwm thov, ntau ruaj khov, thiab tsawg dua mus tawg lossis shrinkage dhau sijhawm. Los ntawm kev ua kom zoo ua qauv nrog RDP, Putty powders dhau los ua ntau yam kev ua tau zoo, muaj kev ua kom zoo dua qub, hardness, thiab tsis kam rau cov khoom.
Lub sij hawm ncua: Lub sijhawm 20-2025