HPMC (hydroxypropyl methylcellulose) yog ib qho tseem ceeb ntawm ntau yam tshuaj ntxiv uas tau siv dav hauv cov khoom siv hauv tsev, tshwj xeeb tshaj yog hauv kev txhim kho kev ua haujlwm hauv tsev. Kev siv HPMC ua rau cov khoom siv hauv tsev ua kom pom cov khoom zoo ntawm lub cev thaum siv thiab siv mus ntev.
1. Cov yam ntxwv tseem ceeb thiab cov txheej txheem ntawm kev ua ntawm HPMC
HPMC yog ib tug semi-synthetic polymer tau los ntawm natural plant cellulose los ntawm kev ua tshuaj. Nws cov qauv tshuaj lom neeg yooj yim muab nws cov dej khaws cia zoo, viscosity hloov kho muaj peev xwm, zaj duab xis tsim cov khoom, shrinkage kuj thiab lwm yam khoom. Cov khoom no ua rau nws tseem ceeb tshwj xeeb hauv kev tsim kho kev lag luam. Lub luag haujlwm ntawm HPMC feem ntau yog ua raws li hauv qab no:
Kev tuav dej: HPMC muaj peev xwm tuav tau dej zoo, uas tuaj yeem txo cov evaporation ntawm cov dej thiab xyuas kom muaj dej txaus txaus ntawm cov cement thiab mortar thaum lub sij hawm hardening txheej txheem. Cov tshuaj tiv thaiv dej kom zoo tsis tsuas yog txhim kho lub zog ntawm cov khoom, tab sis kuj txo qhov tshwm sim ntawm cov kab nrib pleb.
Bonding zog: Raws li cov thickener thiab stabilizer, HPMC tuaj yeem txhim kho cov khoom sib txuas ntawm cov khoom siv hauv tsev. Nws cov nyhuv thickening ua rau mortar, putty, xim thiab lwm yam khoom zoo sib xws thaum lub sij hawm tsim kho, ua rau lawv yooj yim rau kis thiab tsis tshua muaj sag.
Txhim kho kev tsim kho: HPMC tuaj yeem txhim kho kev tsim kho ntawm cov khoom siv hauv tsev los ntawm kev kho lawv qhov sib xws. Thaum lub sij hawm tsim kho, HPMC tuaj yeem txhim kho qhov fluidity thiab kev ua haujlwm ntawm cov ntaub ntawv, txuas ntxiv lub sijhawm qhib, thiab pab cov neeg ua haujlwm los kho cov kev tsim kho.
Anti-sag: HPMC ua rau kom muaj kev sib koom ua ke ntawm cov khoom siv hauv tsev, tshwj xeeb tshaj yog nyob rau hauv cov dav hlau ntsug lossis cov tsev siab siab, tiv thaiv cov ntaub ntawv los ntawm sagging vim lub ntiajteb txawj nqus thiab ua kom qhov tseeb ntawm kev tsim kho.
2. Kev siv HPMC hauv cov khoom siv sib txawv
HPMC tau siv dav hauv ntau yam khoom siv hauv tsev, thiab cov khoom siv sib txawv hauv tsev muaj cov kev cai sib txawv thiab cov txheej txheem ua haujlwm rau HPMC. Lub luag haujlwm ntawm HPMC yuav tau tham hauv qab no los ntawm ntau yam khoom siv hauv tsev.
2.1 Cement mortar
Hauv cov cement mortars, lub luag haujlwm tseem ceeb ntawm HPMC yog los txhim kho cov dej tuav thiab txhim kho kev tsim kho. Nws slows cia cov evaporation ntawm cov dej kom cov cement muaj cov dej txaus thaum lub sij hawm hydration txheej txheem los tsim ib tug muaj zog thiab ruaj khov qauv. Tsis tas li ntawd, kev siv HPMC tuaj yeem txhim kho kev ua haujlwm ntawm cov mortar, ua rau nws yooj yim dua rau cov neeg ua haujlwm tsim ua haujlwm scraping thiab smoothing.
2.2 Pobzeb nplaum
Ceramic pobzeb nplaum yuav tsum muaj cov khoom sib txuas zoo thiab ua haujlwm tsis zoo, thiab HPMC ua lub luag haujlwm tseem ceeb hauv qhov no. Los ntawm kev ua kom cov viscosity ntawm cov pobzeb nplaum, HPMC tuaj yeem tiv thaiv cov vuas los ntawm kev zawv zawg vim lub ntiajteb txawj nqus tom qab thov. Tsis tas li ntawd, HPMC tuaj yeem txhim kho qhov ntub dej thiab ua haujlwm ntawm cov nplais nplaum, kom ntseeg tau tias cov vuas tau zoo dua qub thaum lub sijhawm tsim kho.
2.3 Self-leveling pem teb
Nyob rau hauv tus kheej-leveling pem teb, HPMC yog siv los kho cov fluidity ntawm cov ntaub ntawv kom nws thiaj li tuaj yeem tsim ib qho chaw tiaj tus thaum pw thaum tsis txhob tsim cov npuas npuas. HPMC ua kom cov txiaj ntsig zoo tshaj plaws ntawm cov ntaub ntawv qib siab tus kheej hauv lub sijhawm luv luv thiab txhim kho lawv cov kev tiv thaiv rau hnav thiab tawg.
2.4 Putty hmoov
Raws li cov khoom siv kho kom zoo nkauj ntawm phab ntsa, cov hmoov putty yuav tsum muaj qhov zoo adhesion, flatness thiab smoothness. Lub luag haujlwm ntawm HPMC hauv cov hmoov putty yog muab cov viscosity tsim nyog thiab dej tuav kom tsis txhob muaj cov putty qhuav tawm ntxov ntxov thiab ua rau tawg lossis hmoov poob thaum lub sijhawm tsim kho. Los ntawm kev siv HPMC, cov hmoov putty adheres zoo dua rau ntawm phab ntsa saum npoo, tsim ib qho sib npaug, du txheej.
2.5 Sab nrauv phab ntsa rwb thaiv tsev
Nyob rau sab nrauv phab ntsa rwb thaiv tsev, HPMC tuaj yeem txhim kho lub zog ntawm kev sib txuas ntawm cov mortar thiab ua kom muaj kev sib raug zoo ntawm cov rwb thaiv tsev thiab phab ntsa. Nyob rau tib lub sijhawm, nws cov dej tuav kuj tuaj yeem tiv thaiv cov mortar los ntawm kev ziab sai heev, ncua nws lub sijhawm qhib, thiab txhim kho kev tsim kho. Tsis tas li ntawd, HPMC tuaj yeem txhim kho huab cua tiv thaiv thiab kev laus tiv thaiv ntawm cov khoom siv, txuas ntxiv kev pab cuam lub neej ntawm cov kab hluav taws xob sab nrauv.
3. HPMC lub zog tseem ceeb hauv kev txhim kho kev ua haujlwm hauv tsev
3.1 Txhim kho qhov ruaj khov ntawm cov khoom siv hauv tsev
Los ntawm kev tswj hwm cov txheej txheem hydration ntawm cov ntaub ntawv hauv tsev, HPMC ua rau cov khoom muaj zog thiab ruaj khov. Tsis tsuas yog txo qhov tshwm sim ntawm cov kab nrib pleb, nws kuj tseem tiv thaiv kev puas tsuaj ntawm cov khoom siv hauv tsev los ntawm kev ya raws. Hauv kev siv mus ntev, HPMC kuj muaj cov khoom zoo los tiv thaiv kev laus thiab tuaj yeem ua kom ntev lub neej kev pab cuam ntawm lub tsev.
3.2 Txhim kho kev tsim kho ntawm cov khoom siv hauv tsev
Qhov zoo tshaj plaws maneuverability thiab txav tau los ntawm HPMC ua rau cov neeg ua haujlwm tsim kho yooj yim dua thaum lub sijhawm tsim kho. Tshwj xeeb tshaj yog thaum tsim cov cheeb tsam loj, qhov sib xws thiab ductility ntawm cov ntaub ntawv tseem ceeb heev. Los ntawm kev ncua sij hawm qhib, HPMC tso cai rau cov neeg ua haujlwm tsim lub sijhawm so thiab txo qhov muaj peev xwm rov ua haujlwm thiab kho dua tshiab, yog li txhim kho kev tsim kho kom zoo.
3.3 Txhim kho qhov zoo ntawm cov khoom siv hauv tsev
Hauv kev tsim kho phab ntsa thiab hauv pem teb, HPMC pab tsim kom muaj qhov du, txawm tias ntog, tsis txhob muaj qhov tsis zoo los ntawm kev ziab tsis sib xws lossis cov khoom sagging. HPMC yog ib qho tseem ceeb ntxiv rau cov khoom siv hauv tsev high-end uas xav tau kev tsim kho. Nws cov khoom ua yeeb yaj kiab ua kom ntseeg tau tias cov khoom siv tuaj yeem tsim cov txheej txheem tiv thaiv zoo tom qab kho, ntxiv dag zog rau kev zoo nkauj thiab kev ua haujlwm ntawm cov khoom siv hauv tsev.
4. Tus nqi ntsuab ib puag ncig tiv thaiv ntawm HPMC
Ntxiv rau kev txhim kho kev ua haujlwm hauv tsev, HPMC kuj tseem muaj txiaj ntsig zoo ib puag ncig. Raws li cov khoom siv los ntawm ntuj cellulose, HPMC yog ib puag ncig tus phooj ywg thiab nyob rau hauv txoj kab nrog niaj hnub no tus qauv ntawm ntsuab thiab sustainable kev loj hlob nyob rau hauv kev tsim kho kev lag luam. Nws siv txo qhov xav tau ntawm cov tshuaj binders, yog li txo qis cov pa phem emissions. Tsis tas li ntawd, kev ua tau zoo ntawm HPMC kuj txo cov khoom pov tseg thiab rov ua haujlwm dua, ua rau muaj txiaj ntsig zoo rau kev txuag hluav taws xob thiab kev txo qis hauv kev tsim kho.
Kev siv dav ntawm HPMC hauv kev tsim kho muab cov kev daws teeb meem txhim khu kev qha rau kev txhim kho cov khoom siv hauv tsev. Los ntawm kev txhim kho dej tuav, txhim kho adhesion, thiab txhim kho kev tsim kho kom zoo, HPMC ua kom zoo dua qub thiab ruaj khov ntawm cov khoom siv hauv tsev. Tsis tas li ntawd, raws li ib tug ntsuab thiab ib puag ncig tus phooj ywg additive, HPMC muaj peev xwm tseem ceeb nyob rau hauv lub neej yav tom ntej txoj kev loj hlob ntawm kev tsim kho kev lag luam. Nyob rau hauv lub neej yav tom ntej, nrog kev nruam ntej ntawm cov khoom siv thev naus laus zis thev naus laus zis, daim ntawv thov thiab kev txhim kho kev ua haujlwm ntawm HPMC yuav txhawb nqa kev nce qib ntawm kev tsim kho kev lag luam.
Post lub sij hawm: Sep-12-2024