Redispersible looj hmoov (RDP) yog cov khoom lag luam polymer emulsion rau hauv cov dej dawb los ntawm kev tshuaj tsuag tshuab. Thaum cov hmoov tau sib xyaw nrog dej, nws rov ua kom zoo dua cov yas thiab muaj cov khoom zoo ib yam li cov thawj emulsion. Vim tias cov xeeb ceem tshwj xeeb, rov qab siv cov hmoov looj hauv cov khoom siv, cov nplaum, cov xim sib xyaws thiab lwm thaj teb.
1. Qhov zoo ntawm redispersible looj hmoov
Txhim kho cov khoom lag luam hluav taws xob rov qab cov khoom lag luam looj tensile zog, muaj zog ntawm cov khoom siv kom muaj zog. Qhov no yog vim hais tias cov hmoov yas tau ua ib qho kev ua yeeb yaj kiab Polymer polymer, txhim kho ntawm cov khoom siv xis thiab tawv ntawm cov khoom siv, yog li kev txhim kho cov kev ua tau zoo tag nrho. Piv txwv li, hauv cov nplais nplaum, ntxiv cov hmoov yas looj kom haum tuaj yeem txhim kho nws txoj kev sib raug zoo thiab tiv thaiv cov vuas los ntawm kev poob.
Kev ua kom zoo zuj zuj tsis kam thiab tsis tsim nyog hauv cov ntaub ntawv hauv tsev, tawg tsis kam thiab impermabeabability yog cov ntsuas kev ua tau zoo. Redispersible looj cov hmoov tuaj yeem sau cov capillary pores hauv cov khoom siv los ntawm kev sib sau ua yeeb yaj kiab polymer, txo cov dej nkag mus thiab txhim kho impermility. Nyob rau tib lub sijhawm, cov lus yeeb yaj kiab elasticity kuj tseem tuaj yeem ua kom qeeb lossis tiv thaiv kev txhim kho ntawm microcacks, yog li kev txhim kho kev tawg sai. Yog li no, cov hmoov yas tau siv dav hauv phab ntsa sab nrauv phab ntsa rwb thaiv tsev tshuab thiab cov ntaub ntawv hauv pem teb.
Txhim kho kev tsim kho txoj kev tsim kho: Txij li Redispersible looj cov hmoov zoo thiab cov khoom siv ua haujlwm ntawm cov txheej txheem tsim kho, ua kom cov khoom siv tau yooj yim dua thiab siv tau. Ntxiv rau, cov hmoov looj app kuj tseem tuaj yeem txuas lub sijhawm qhib ntawm cov khoom siv (uas yog lub sijhawm tseem ua haujlwm tau zoo thaum kev tsim kho), thiab txo cov peev xwm kev tsim kho, thiab txo cov khoom siv pov tseg.
Txhim kho qhov txhab yuam kev ntawm polymer zaj duab xis tsim los ntawm redispersible yas hmoov muaj cov laus tiv taus thiab tiv thaiv zoo. Nws tuaj yeem tiv thaiv kev cuam tshuam ntawm ultraviolet rays, kua qaub thiab alkali corrosion thiab lwm cov pejxeem ib puag ncig, yog li txuas ntxiv lub neej ntawm cov khoom. Piv txwv li, ntxiv cov hmoov yas yas rau sab nraud phab ntsa tuaj yeem tiv thaiv huab cua, thiab tswj hwm kev zoo nkauj thiab ua haujlwm ntawm lub tsev saum npoo.
Kev tiv thaiv ib puag ncig thiab cov khoom siv hluav taws xob redinepersible cov hmoov zoo li qub thiab tsis tso tawm cov khoom siv txuas ntxiv ntawm cov khoom lag luam hauv tsev. Ib qho ntxiv, nws cov kev ua tau zoo tso cai rau cov tuab thiab cov khoom siv hauv tsev kom raug txo kom tsawg, yog li txo kev noj thiab ib puag ncig thauj khoom.
2. Cov nyom ntawm Redispersible looj hmoov
Tus nqi tsim yog siab. Cov txheej txheem ntau lawm ntawm redispersible looj hmoov ntau yog nyuaj thiab tseev kom muaj ntau cov txheej txheem xws li emulsion polymerization. Tshwj xeeb tshaj yog nyob rau hauv cov tshuaj tsuag cov txheej txheem kom qhuav, muaj lub zog loj tau noj, yog li nws tus nqi tsim khoom yog siab. Qhov no tau ua rau muaj kev txwv tsawg ntawm redispersible looj hmoov hauv qee cov haujlwm tsim nyog.
Nkag siab rau cov kev mob ib puag ncig recispersible looj hmoov yog rhiab rau cov kev mob ib puag ncig xws li kub thiab av noo. Thaum lub sij hawm cia thiab tsheb thauj mus los, yog tias cov av noo siab dhau los yog qhov ntsuas kub tsis tsim nyog, qhov yuav cuam tshuam rau nws txoj kev rov ua tiav thiab cov txiaj ntsig kev thov ua zaum kawg. Yog li ntawd, nws muaj cov siab yuav tsum muaj cov xwm txheej cia thiab xav tau khaws cia rau hauv ib puag ncig qhuav thiab txias.
Cov kev txwv ntawm kev tsis sib xws tab sis recispersible looj dej looj hauv dej, nws cov kev tawg rau hauv dej, nws tseem ua lags ntawm thawj emulsion. Yog tias cov dej tsis zoo yog cov tsis zoo (xws li dej nyuaj lossis muaj ntau yam tsis zoo), nws yuav cuam tshuam rau kev rho tawm ntawm cov hmoov yas looj tes thiab tiv thaiv nws cov kev ua tau zoo. Yog li ntawd, hauv cov ntawv thov tiag tiag, nws yuav tsim nyog siv cov tshuaj ntxiv lossis kho cov dej zoo kom ntseeg tau cov txiaj ntsig zoo tshaj plaws.
Kev paub txog kev ua lag luam thiab kev nce qib kev ua lag luam raws li cov khoom siv tshiab, cov khoom siv rov qab muaj tsawg dua hauv qee lub tebchaws lossis kev lag luam thiab kev siv nyiaj thiab cov ntawv thov yuav raug rau qee qhov kev txwv. Txawm hais tias nws cov kev ua tau zoo dua, qee lub tuam txhab siv tsim khoom muaj tsawg lees txais ntawm nws vim cov nqi ntau lawm thiab cov nqi. Lub sijhawm thiab kev kawm ua lag luam tseem xav tau hloov pauv cov xwm txheej no.
Kev sib tw los ntawm Lwm Cov Khoom Siv nrog kev txhim kho cov ntaub ntawv kev tshawb fawb, cov ntaub ntawv xaiv tshiab tau tshwm sim tas li ntawm kev ua lag luam. Cov ntaub ntawv tshiab no yuav qhia tau kev ua haujlwm zoo dua lossis tus nqi qis dua liab qab ntawm qee qhov, ntawm cov kev sib tw rau kev ua lag luam ntawm cov hmoov av. Txhawm rau kom nyob twj ywm sib tw, cov tuam txhab tsim khoom yuav tsum tsis tas li ua kom zoo dua cov khoom lag luam thiab cov nqi tswj.
Raws li cov khoom siv polymer piymeral, redispersible looj cov khoom lag luam, tshwj xeeb tshaj yog nyob rau hauv kev txhim kho cov khoom siv tau, txhim kho cov khoom lag luam thiab txhim kho lub durability. Txawm li cas los xij, nws cov nqi ntau lawm, rhiab rau cov xwm txheej ib puag ncig thiab kev sib tw ua lag luam tsis tuaj yeem tsis quav ntsej. Yav tom ntej, nrog kev nce qib ntawm kev thev naus laus zis thiab kev ua lag luam zoo nkauj, yog qhov ua tau zoo dua, yog li ua tau zoo tshaj plaws hauv kev ua haujlwm ntawm cov ntaub ntawv hauv tsev Cov.
Lub Sijhawm Post: Sep-03-2024