HydroxypropylraylSylcellulose (HPMC) yog ntau yam siv polymer uas muaj ntau yam lag luam, suav nrog kev ua haujlwm tsim khoom. Hauv kev muab cov ntawv thov cafs, HPMC ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua tau zoo thiab kev ua tau zoo ntawm cov khoom siv xis.
1. Txheej txheem cej luam ntawm HydroxyPropyyl methylcellulose (HPMC):
HPMC yog ib nrab hluavtaws dej-soluble polymer muab tau los ntawm cellulose, lub ntuj polymer pom hauv cov nroj tsuag. Kev tsim khoom HPMC koom kev hloov kho ntawm cellulose los ntawm etherification los ntawm hydroxypropyl thiab methyl pawg. Cov kev hloov pauv no txhim kho cov dej khaws cia, muaj peev xwm ua kom muaj zog, thiab txhua yam kev ua tau zoo ntawm HPMC hauv ntau cov ntawv thov.
2. Cov yam ntxwv ntawm HPMC ntsig txog Caas-raws li cov khoom siv:
2.1. Dej khaws cia:
Ib qho ntawm cov khoom tseem ceeb ntawm HPMC hauv kev siv cov ntawv thov kev tso cai yog nws lub peev xwm los khaws dej. HPMC ua cov yeeb yaj kiab tiv thaiv ib ncig ntawm cov Maas hais tawm, txo cov dej ntws ulatoration thaum lub sijhawm kho. Qhov kev ua kom muaj dej txuag no txhim kho kev ua kom muaj dej xis, yog li nce lub zog thiab cov khoom txaus ntawm cov khoom kawg.
2.2. Rheological hloov kho:
Raws li kev hloov kho rheology, HPMC cuam tshuam rau lub fluidity thiab workability ntawm cov ntaub ntawv MAAs. Los ntawm kho tus nqi HPMC, cov neeg tsim vaj tse thiab cov tuam ntxhab tuaj yeem ua tiav qhov kev xav tau thiab viscosity ntawm xisas mix. Qhov no yog qhov tshwj xeeb tshaj yog rau kev siv xws li cug vab, qhov chaw ua haujlwm yog qhov tseem ceeb rau kev kho kom raug ntawm lub tshuaj khib.
2.3. Adhesion thiab Tsevneeg:
Cov khoom nplaum ntawm HPMC pab txhawb kev sib raug zoo ntawm Caas hais thiab lwm cov ntaub ntawv hauv tsev. Qhov no yog qhov tseem ceeb hauv kev tsim cov qauv muaj zog thiab ruaj khov. HPMC tuaj yeem txhim kho cov nplaum ntawm cov txiv qaub-raws cov ntaub ntawv rau ntau substrates thiab txhim kho kev ua tau zoo tag nrho.
2.4. Teeb sijhawm tswj:
HPMC tuaj yeem cuam tshuam lub sijhawm teem sijhawm cov khoom noj khoom haus. Los ntawm kev kho cov hom thiab kev xav txog HPMC, cov tuam tsev tuaj yeem tswj hwm tus thawj zaug thiab lub sijhawm zaum kawg ntawm kev sib tov cemas. Qhov kev hloov pauv no yog qhov tseem ceeb rau kev tsim kho cov dej num uas muaj lub sijhawm tshwj xeeb rau theem ntawm kev loj hlob.
2.5. Txhim kho cov txheej txheem:
Qhov kev sib txuas ntawm HPMC rau cov cement-raws sib xyaw ua ke txhim kho cov haujlwm ua haujlwm los ntawm kev txo cov cais thiab txhim kho cohesion. Qhov no yog tau txais txiaj ntsig tshwj xeeb hauv cov ntawv thov xws li plastering, rendering siv thiab ua haujlwm nyob ib qho twg yog qhov tseem ceeb yog qhov tseem ceeb rau kev ua tiav cov txiaj ntsig tau zoo ib yam.
3. Daim ntawv thov ntawm HPMC hauv lub tshuab casent-raws li:
3.1. Tshuaj khib:
HPMC tau siv dav hauv kev sib nraus ua qauv txhawm rau txhim kho kev ua haujlwm, adhesion thiab dej khaws cia. Mortars muaj cov khoom pov thawj HPMC tau txhim kho cov khoom, ua daim ntawv thov yooj yim dua thiab ua tau zoo dua ntawm lub zog thiab kav ntev.
3.2. Pobzeb Adhesive:
Nyob rau hauv cov nplais nplaum tsim, HPMc ua si lub luag haujlwm tseem ceeb hauv kev txhim kho cov nplaum ntawm cov nplais rau substrate. Nws kuj tseem yuav pab txhim kho cov nplaum ua haujlwm, ua kom tau txais kev pab them nqi kom zoo thiab ua tsev.
3.3. Kev Ntsuas Tus Kheej Cov Lus Cog Tseg:
Kev siv tus kheej txoj kev sib xyaw ua ke tau siv hauv kev tsim kho los tsim kom muaj kev du, txawm tias saum npoo. Qhov kev sib txuas ntawm HPMC rau cov tebchaw tswj viscosity, txhim kho cov khoom txaus siab thiab txhim kho kev ua tau zoo ntawm cov txheej txheem theem.
3.4. Plaster thiab rendering:
Hauv Gypsum thiab Plaster cov qauv, HPMC txhim kho cov dej tuav, kev ua haujlwm thiab cov nplaum. Cov txiaj ntsig no ua rau cov ntawv thov kev ua tau zoo dua thiab muaj ntau dua, ua kom zoo nkauj ua kom tiav.
3.5. Qhia meej:
HPMC tuaj yeem siv tau rau hauv cov pob zeb sib xyaw los txhim kho kev ua haujlwm thiab txo cov dej. Nws kuj tseem yuav pab txhim kho tag nrho cov neeg ua pob zeb los ntawm kev txhim kho cov txheej txheem hydration thiab txo qhov kev pheej hmoo ntawm kev tawg.
4. Qhov zoo ntawm kev siv HPMC hauv Kev Siv CAs-basic
4.1. Txhim kho cov txheej txheem:
Ntxiv HPMC mus rau Maas-Raws li kev sib xyaw ua ke txhim kho nws cov haujlwm, ua rau nws tau yooj yim dua thiab txua. Qhov no yog qhov tseem ceeb tshaj plaws rau kev tsim kho cov dej num uas yooj yim ntawm daim ntawv thov yog qhov tseem ceeb.
4.2. Txhim kho adhenion:
HPMC txhim kho cov nplaum ntawm cov txiv qaub ua ke cov ntaub ntawv rau ntau yam ntawm substrates, ua rau muaj zog dua, ntau cov qauv ruaj khov. Qhov no yog qhov tseem ceeb rau kev siv xws li tiling, plastering thiab rendering.
4.3. Dej khaws cia:
Cov khoom siv dej-khaws cia ntawm HPMC pab txhawb kev hloov siab zoo dua yooj yim, yog li nce lub zog thiab kav ntev ntawm cov khoom kawg. Qhov no yog qhov tshwj xeeb tshaj yog nyob rau hauv cov xwm txheej uas txaus kho tau yog qhov nyuaj.
4.4. Rheological hloov kho:
HPMC yog siv los ua cov rheology hloov kho, tso cai rau cov neeg tsim vaj tse kom tswj tau cov dej ntws thiab sib txawv ntawm cov khoom siv xis. Qhov kev hloov pauv no yog qhov tseem ceeb hauv kev ua tiav cov yam xav tau rau ib daim ntawv thov tshwj xeeb.
4.5. Teeb sijhawm tswj:
Siv HPMC tso cai tswj lub sijhawm ntawm cov khoom noj movent-based, tso cai rau nws yuav tsum ua kom haum rau phiaj xwm. Qhov no yog qhov tseem ceeb rau kev tsim kho cov dej num nrog sib txawv lub sij hawm txwv.
5. Cov kev sib tw thiab cov kev txiav txim siab:
Thaum HPMC muaj ntau qhov zoo hauv kev siv cov ntawv thov tso tseg, muaj qee txoj kev sib tw thiab kev txiav txim siab uas yuav tsum tau ceev cia hauv siab. Kev siv tshuaj ntau ntau, kev sib xyaw nrog lwm cov kev sib ntxiv, thiab cov ib puag ncig yuav cuam tshuam kev ua haujlwm ntawm HPMC hauv cov qauv tshwj xeeb. Kev kuaj kom txhij txhua thiab kev tswj hwm zoo yog qhov tsim nyog los ua kom zoo rau kev siv HPMC hauv ntau yam kev ua haujlwm.
HydroxyPropyyl methylulose (HPMC) yog qhov tseem ceeb ntxiv hauv kev ua haujlwm, kev ua haujlwm, dej khaws cia ntawm cov ntaub ntawv tsim tsev. Nws cov vagatility ua rau nws haum rau ntau cov ntawv thov, los ntawm mortars thiab pobzeb nplaum kom tus kheej-leveling thiab pob zeb sib xyaw. Raws li kev tsim kho kev tsim kho txuas ntxiv mus hloov zuj zus, kev siv HPMC muab kev tsim kho kom tau raws li qhov kev xav tau ntawm kev tsim kho niaj hnub thaum ua kom muaj zog thiab ntev ntawm cov qauv. Kev ntsuam xyuas kom txhij txhua, tswj kev kom zoo thiab ua raws li cov kev coj ua tau yooj yim los paub txog HPMC hauv cov khoom siv hlwb.
Lub Sijhawm Post: Feb-19-2025