HydroxyPropyyl methylcellueculose (HPMC) yog qhov tseem ceeb additive nyob rau hauv cov vile niaj hnub nplaum thiab siv cov tshuaj admixtures. Nws cov kev ua haujlwm ntau ntau pab tau txhua yam ntawm cov qauv nplaum ntawm cov nplaum, kev ua kom txhim kho cov txheej txheem, dej khaws cia, nplaum thiab tag nrho cov kev ua tau zoo.
Kev lag luam kev tsim kho txuas ntxiv mus nrhiav cov kev daws teeb meem tshiab los txhim kho kev ua haujlwm thiab cov ntaub ntawv hauv tsev. Ntawm cov ntxiv ntxiv siv nyob rau hauv kev tsim cov tshuaj tsim kho, hydroxypropylulose (HPMC) tau nyiam ua kom zoo nkauj vim nws cov txiaj ntsig ntau hauv cov nplais adhesives thiab siv cov tshuaj admixtures. HPMC yog ib qho kev sib txuam ntawm cov cellulose nrog cov khoom tshwj xeeb uas tuaj yeem cuam tshuam kev ua tau zoo ntawm cov nplaum ntawm kev tsim kho cov dej num kev tsim kho. Lub hom phiaj ntawm tsab xov xwm no yog txhawm rau tshawb txog lub luag haujlwm thiab cov kev pab cuam ntawm pawg neeg tshuaj ntsuab, kev siv tshuaj lom neeg thiab qhov zoo nws muab rau kev tsim kho kev tsim kho.
1. Tshuaj lom neeg sib xyaw ua ke thiab cov khoom ntawm HPMC:
HydroxyPropyyl methylcellose (HPMC) yog ib nrab hluavtaws polymer co kho los ntawm cellulose. Nws yog synthesized los ntawm kev kho cellulose nrog cov tshuaj pleev cov epylene oxide thiab methyl chloride, tsim cov tshuaj methylopyl thiab meth thiab -ch3 pawg) txuas nrog lub cellulose caj qaum. Cov qib ntawm kev hloov pauv (DS) ntawm cov pab pawg methylropyl thiab cov methyl pawg txiav txim siab cov khoom ntawm HPMC, suav nrog viscosity, solubility, thiab thermal stability.
HPMC muaj cov dej ua dej txig zoo heev thiab cov qauv ua pob tshab thiab cov tshuaj pleev xim thaum tawg hauv dej. Txawm li cas los xij, nws solubility yog nyob ntawm qhov kub thiab txias, nrog qhov kub siab dua qhov kev nyiam ua kom muaj kev xaus. Cov cuab yeej no ua rau HPMC haum rau kev siv hauv kev tsim kho cov tshuaj raug cov dej uas cov txheej txheem dej sib txuas. Ib qho ntxiv, HPMC imparts pseudopastic tus cwj pwm rau kev daws teeb meem, txhais tau tias nws viscosity txo qis ntawm kev thov thiab txhim kho cov txheej txheem ntawm cov qauv zoo nkauj.
2. Lub tshuab ua haujlwm ntawm kev ua ntawm cov pobzeb pobzeb nplaum:
Nyob rau hauv cov nplais nplaum tsim, HPMC ua haujlwm ntau yam kev ua haujlwm vim nws cov qauv tshuaj lom thiab cov yam ntxwv. Ib qho ntawm nws txoj haujlwm tseem ceeb yog ua raws li cov tuab tuab, txhim kho kev sib xws thiab ua haujlwm ntawm cov nplaum. Los ntawm kev nce viscosity, HPMC pab tiv thaiv kom tiv thaiv cov nplaum cug ntawm sagging lossis tsaus muag, ua kom muaj kev fajseeb khomob thiab kev sib raug zoo ntawm cov nplais thiab substrate.
HPMC kuj ua raws li dej tuav tus neeg sawv cev, tso cai rau cov nplaum kom muaj cov ntsiab lus dej noo txaus thaum lub sijhawm kho cov txheej txheem. Cov cuab yeej no yog qhov tseem ceeb kom ntseeg tau tias muaj cov khoom siv kom zoo ntawm cov khoom qab zib, txhawb kev pheej hmoo ntawm shrinkage cracks. Tsis tas li ntawd, HPMC cov dej-tuav lub peev xwm pab txuas ntxiv lub sijhawm qhib, tso cai rau lub sijhawm txaus rau cov chaw khi khoom thiab kev hloov kho ua ntej cov nplaum.
HPMC ua ib zaj duab xis hloov pauv thiab cov yeeb yaj kiab nplaum thaum ziab, li kev txhim kho cov khoom sib khi ntawm cov nplais nplaum. Zaj duab xis ua raws li kev nplaum, txhawb kev sib raug zoo ntawm txheej nplaum, cov vuas thiab substrate. Lub xub ntiag ntawm HPMC txhim kho lub zog ua kom muaj zog thiab kav kav cov vuas teeb tsa, txo lub peev xwm ua rau debond lossis delamination thaum lub sijhawm.
3. Kev cuam tshuam ntawm kev siv cov tshuaj admixtures:
Ntxiv rau cov noob nplaum nplaum, HPMC tau dav siv nyob rau hauv ntau yam kev siv khoom admixtures, suav nrog mortars, plasters thiab guts. Nws cov khoom muaj ntau zog ua rau nws tsis tseem ceeb ntxiv los txhim kho kev ua tau zoo thiab kav ntev ntawm cov ntaub ntawv no. Hauv cov neeg muaj neeg muaj neeg tuag, HPMC ua raws li kev hloov kho rheology, tswj hwm tus cwj pwm ntws thiab sib xyaw ntawm cov sib xyaw. Qhov no ua kom cov kev ua tiav zoo ib yam thiab txhim kho kev ua haujlwm, pab txhawb kev tso chaw thiab txo cov khoom pov tseg.
HPMC pab txhim kho kev tswj hwm tus kheej ntawm flooring sib txuas thiab cov cov noob scriging thiab cov noob pom kom du, txawm tias saum npoo. Nws cov dej-tuav lub peev xwm tiv thaiv sib tov los sib tov, txhawb nqa kom zoo saib thiab minimizes nto tsis zoo xws li tawg. Tsis tas li ntawd, HPMC txhim kho cov nplaum thiab cov nplaum ntawm plasters thiab grouts, uas ua rau muaj zog, ua tiav zoo nkauj dua.
Kev siv HPMC hauv kev siv cov tshuaj admixtures yog nyob rau hauv txoj kab nrog kev tsim kho cov hom phiaj ruaj khov. Los ntawm kev txhim kho cov txheej txheem thiab txo cov khoom siv, HPMC muaj txiaj ntsig rau cov chaw pabcuam thiab khib nyiab pov tseg. Ib qho ntxiv, nws lub luag haujlwm hauv kev txhim kho lub tsev cov ntaub ntawv pab kom ntev lub neej ntawm lub tsev, yog li txo qhov kev kho mob lossis hloov pauv nquag.
HydroxyPropyyl methylcellueculose (HPMC) plays Lub Luag Haujlwm Tseem Ceeb hauv cov txiaj ntsig niaj hnub no uas pab txhim kho kev ua haujlwm, kev ua haujlwm thiab kav ntev. Nws cov tshuaj tshwj xeeb cov tshuaj thiab muaj zog kom nws ua raws li cov tuab dua, dej tuav tus neeg sawv cev thiab cov khoom lag luam adhesive hauv cov qauv nplaum. Ib qho ntxiv, HPMC txhim kho cov khoom siv hluav taws xob ntawm kev siv cov tshuaj admixtures los pab txhawb kev thov thiab xyuas kom meej ntawm cov khoom tiav.
Qhov kev siv dav dav ntawm HPMC nyob rau hauv kev tsim kho kev tsim kho nws yog qhov tseem ceeb ntxiv uas tau txhim kho cov khoom zoo thiab muaj kev ruaj khov ntawm cov ntaub ntawv hauv tsev. Raws li kev tsim kho cov kev tsim kho txuas ntxiv mus hloov zuj zus los txhim kho kev ua haujlwm thiab kav ntev dua thiab ua kom muaj kev tshawb fawb txog HPMC. Los ntawm kev tsim txom lub peev xwm ntawm HPMC, kev tsim kho kev tsim kho tuaj yeem paub txog kev ua tau zoo thiab pab txhawb kom ib puag ncig ntau dua.
Lub Sijhawm Post: Feb-26-2024