Hydroxypropyl Methyl Cellulose (HPMC) yog ib qho polymer uas siv tau ntau yam thiab siv tau rau ntau yam khoom siv hauv tsev vim nws cov yam ntxwv tshwj xeeb. Cov cellulose ether derivative no yog los ntawm cov cellulose ntuj thiab siv dav hauv cov khoom siv hauv tsev vim nws khaws dej, ua kom tuab, thiab muaj peev xwm khi.
1. Kev Taw Qhia Txog Hydroxypropyl Methyl Cellulose (HPMC)
Hydroxypropyl Methyl Cellulose yog ib qho cellulose ether uas tsis yog ionic uas tau los ntawm kev kho cov cellulose ntuj nrog propylene oxide thiab methyl chloride. Nws yaj tau hauv dej thiab tsim cov kua pob tshab, viscous. Qhov xwm txheej ntawm HPMC yog los ntawm nws lub peev xwm los hloov kho cov khoom rheological, kev khaws dej, thiab kev nplaum hauv cov ntaub ntawv tsim kho.
2. Cov ntawv thov hauv Mortar
2.1. Kev Khaws Dej
HPMC feem ntau siv rau hauv cov qauv mortar kom txhim kho kev khaws dej. Nws qhov xwm txheej hydrophilic tso cai rau nws nqus thiab khaws dej, tiv thaiv kom cov mortar qhuav ua ntej. Cov yam ntxwv no ua kom muaj kev ua haujlwm zoo dua, lub sijhawm teeb tsa ntev dua, thiab txhim kho kev lo rau cov substrates.
2.2. Kev Tswj Xyuas Kom Tuab Thiab Kev Hloov Pauv
Qhov ntxiv ntawm HPMC rau hauv cov qauv mortar muab cov khoom thickening uas xav tau, cuam tshuam rau tus cwj pwm rheological ntawm qhov sib tov. Qhov no yog qhov tseem ceeb rau kev yooj yim ntawm kev siv thiab ua tiav qhov sib xws xav tau hauv mortar.
2.3. Kev nplaum zoo dua
Kev siv HPMC rau hauv cov mortar ua rau kom lo rau ntau qhov chaw, ua rau lub zog thiab kev ruaj khov ntawm cov khoom siv hauv kev tsim kho. Qhov no tseem ceeb heev rau cov ntawv thov xws li kev teeb tsa cov vuas ceramic.
3. Cov Ntawv Siv Hauv Cov Nplaum Pobzeb Thiab Cov Grouts
3.1. Kev Ua Haujlwm Zoo Dua
Cov nplaum rau pobzeb feem ntau muaj HPMC los txhim kho kev ua haujlwm thiab lub sijhawm qhib. Cov polymer ua kom cov nplaum tseem nyob hauv qhov xwm txheej ua haujlwm tau ntev, ua rau cov pobzeb tso tau zoo yam tsis qhuav ua ntej.
3.2. Txo Qhov Sagging
HPMC pab txhawb rau cov khoom tiv thaiv kev poob ntawm cov nplaum pobzeb. Qhov no tseem ceeb heev thaum txhim kho cov pobzeb rau ntawm cov chaw ntsug, vim nws tiv thaiv cov pobzeb kom tsis txhob swb ua ntej cov nplaum teeb.
3.3. Kev Tiv Thaiv Kab Ntsig Hauv Cov Grouts
Hauv cov qauv grout, HPMC pab tiv thaiv kev tawg los ntawm kev muab kev ywj pheej thiab txo qhov ntsws. Qhov no muaj txiaj ntsig zoo rau cov chaw uas qhov kub thiab txias hloov pauv tuaj yeem cuam tshuam rau cov ntaub ntawv tsim kho.
4. Cov ntawv thov hauv Plaster
4.1. Txhim kho kev ua haujlwm tau zoo thiab kev nthuav dav
HPMC feem ntau yog ntxiv rau hauv cov qauv plaster kom txhim kho kev ua haujlwm thiab kev nthuav dav. Cov polymer pab ua kom tiav kev siv plaster du thiab sib xws dua ntawm cov chaw.
4.2. Tiv thaiv kev tawg
Zoo li nws lub luag haujlwm hauv cov grouts, HPMC pab txhawb rau kev tiv thaiv kab nrib pleb hauv plaster. Nws tsim cov zaj duab xis ywj pheej uas pab txhawb kev txav mus los ntawm cov khoom siv hauv tsev, txo qhov yuav muaj kab nrib pleb.
5. Cov Ntawv Thov Hauv Cov Tshuaj Sib Xyaws Uas Ua Rau Nws Tus Kheej Zoo Dua
5.1. Kev Tswj Xyuas Kev Nqus Dej
Hauv cov tshuaj sib xyaw ua ke uas nws tus kheej ua tau zoo, HPMC siv los tswj cov dej ntws thiab cov khoom sib npaug. Cov polymer no ua kom muaj kev faib tawm sib npaug thiab pab tswj kom cov khoom sib xyaw tuab raws li qhov xav tau thoob plaws qhov chaw siv.
5.2. Kev nplaum zoo dua
HPMC ua rau cov tshuaj sib xyaw ua ke zoo dua rau ntau yam khoom sib xyaw, ua rau muaj kev sib txuas ruaj khov thiab ruaj khov. Qhov no yog qhov tseem ceeb rau kev ua haujlwm ntev ntawm qhov chaw tiaj tiaj.
6. Xaus Lus
Hydroxypropyl Methyl Cellulose ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua tau zoo ntawm ntau yam khoom siv hauv tsev. Nws daim ntawv thov hauv mortar, vuas nplaum, grouts, plaster, thiab cov khoom sib xyaw ua ke qhia txog nws qhov kev ua tau zoo thiab kev ua haujlwm zoo hauv kev lag luam kev tsim kho. Cov yam ntxwv tshwj xeeb ntawm HPMC, suav nrog kev khaws dej, thickening, thiab kev txhim kho kev nplaum, pab txhawb rau qhov zoo tag nrho, kev ruaj khov, thiab kev ua haujlwm ntawm cov khoom siv hauv tsev no. Raws li kev lag luam kev tsim kho txuas ntxiv mus, HPMC tseem yog ib qho tseem ceeb hauv kev tsim cov khoom siv hauv tsev siab heev thiab kev ua tau zoo.
Lub sijhawm tshaj tawm: Lub Ib Hlis-10-2024