Hydroxypropyl Methyl Cellulose (HPMC) yog ib qho tshuaj ntxiv uas siv dav hauv kev tsim kho thiab tsim cov khoom lag luam thiab ua haujlwm ntau yam hauv kev ua vaj tse.
1. Cov nyhuv tuav dej
Hydroxypropyl methylcellulose muaj cov dej tuav tau zoo. Cov cellulose no tuaj yeem nqus dej ntau thiab maj mam tso tawm thaum lub sijhawm tsim kho, yog li txhim kho cov dej tuav ntawm pob zeb. Cov khoom tuav dej pab khaws cov dej noo txaus thaum lub sij hawm pib hardening theem ntawm pob zeb thiab tiv thaiv kom tsis txhob ya raws ntawm evaporating sai heev. Qhov no yog ib qho tseem ceeb rau kev maj mam txhim kho ntawm pob zeb ua kom muaj zog, txo qhov tshwm sim ntawm cov kab nrib pleb thiab txuas ntxiv cov kav ntev ntawm cov pob zeb.
2. Txhim kho kev tsim kho kev ua haujlwm
Ntxiv hydroxypropyl methylcellulose rau pob zeb tuaj yeem txhim kho nws txoj haujlwm. Cov tshuaj ntxiv no ua rau cov viscosity ntawm cov pob zeb, ua kom yooj yim rau kev ua haujlwm nrog thaum lub sij hawm tsim kho thiab txo kev sib cais thiab los ntshav. Nws ua rau cov pob zeb ua kom muaj dej zoo dua thiab adhesion, yog li pab txhim kho kev ua haujlwm thiab kev tsim kho kom zoo, tshwj xeeb tshaj yog nyob rau hauv daim ntawv thov xws li ntub dej sib tov mortar thiab self-leveling mortar.
3. Txhim kho lubricity
Cov colloid tsim los ntawm HPMC hauv cov kua dej tuaj yeem muab lubrication. Qhov no lubrication txo qhov hnav ntawm cov khoom siv thiab pwm thaum lub sij hawm kev thauj mus los thiab kev tso kawm. Nyob rau tib lub sijhawm, nws tseem tuaj yeem faib cov pob zeb sib npaug ntau dua, txo cov load ntawm cov cuab yeej siv tshuab, thiab txhim kho kev tsim kho thiab kev pabcuam lub neej ntawm cov cuab yeej siv.
4. Txo cov ntshav thiab cais tawm
HPMC ua lub luag haujlwm ruaj khov hauv pob zeb thiab tuaj yeem txo cov ntshav thiab cov teeb meem sib cais hauv pob zeb. Qhov no yog vim HPMC muaj peev xwm ua kom cov viscosity ntawm cov pob zeb slurry, yog li ua kom cov khoom sib npaug sib npaug thiab tiv thaiv kev sib cais ntawm cov dej thiab cov khoom sib xyaw zoo. Qhov no yog qhov tseem ceeb los txhim kho qhov sib xws thiab tag nrho qhov zoo ntawm cov pob zeb.
5. Tswj shrinkage thiab tawg
Cov dej tuav cov nyhuv ntawm hydroxypropyl methylcellulose pab qeeb tus nqi ntawm qhuav shrinkage ntawm pob zeb, yog li txo qhov kev pheej hmoo ntawm kev tawg. Qhob yog qhov ua rau shrinkage tawg vim yog dej sai sai thaum lub sij hawm hardening thiab ziab. HPMC tuaj yeem daws qhov teeb meem no los ntawm kev tswj xyuas qhov tsim nyog ntawm cov dej noo thiab txhim kho qhov ntim ruaj khov ntawm pob zeb.
6. Ncua lub sijhawm teem sijhawm
HPMC muaj qee qhov cuam tshuam ntawm kev ncua sij hawm teem sijhawm thiab tuaj yeem tswj tau qhov kev teeb tsa ntawm pob zeb. Qhov no muaj txiaj ntsig zoo hauv qee qhov kev tsim kho tshwj xeeb, tshwj xeeb tshaj yog thaum huab cua kub lossis thaum yuav tsum tau muaj kev thauj mus los ntev. Kev ncua sij hawm teem sijhawm kom ntseeg tau tias cov pob zeb tseem yuav ntws thiab ua haujlwm zoo thaum nws mus txog qhov chaw tsim kho.
7. Txhim kho khov-thaw tsis kam
HPMC tuaj yeem txhim kho qhov khov-thaw tiv thaiv ntawm pob zeb. Qhov no yog vim nws txoj haujlwm ntawm kev tuav dej thiab txhim kho cov qauv pore tuaj yeem txo cov te heave siab ntawm cov pob zeb hauv qhov chaw tsis muaj qhov kub thiab txias, yog li txo qhov kev puas tsuaj rau cov qauv pob zeb los ntawm khov-thaw mus.
8. Txhim kho corrosion kuj
Hydroxypropyl methylcellulose tuaj yeem ua kom qhov ntom ntom ntawm cov pob zeb, txo cov porosity, thiab cuam tshuam kev nkag mus ntawm dej thiab tshuaj lom neeg. Cov cuab yeej no txhim kho cov kev tiv thaiv corrosion ntawm cov pob zeb thiab txuas ntxiv nws lub neej kev pab cuam, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig raug chloride ions.
9. Txhawb kev sib txuas ua haujlwm
HPMC pab txhim kho kev sib raug zoo ntawm cov pob zeb thiab lwm yam khoom siv. Piv txwv li, thaum pasting cov ntaub ntawv zoo nkauj xws li cov vuas luaj ceramic thiab pob zeb, HPMC tuaj yeem txhim kho qhov adhesion ntawm cov mortar, txo qis thiab hollowing, thiab xyuas kom muaj kev tsim kho zoo.
10. Ntsuab thiab ib puag ncig tus phooj ywg
Raws li cov khoom lag luam cellulose ether, hydroxypropyl methylcellulose muaj biodegradability zoo thiab tsis muaj kev cuam tshuam rau ib puag ncig. Nyob rau tib lub sijhawm, nws tseem tuaj yeem txo qis cov cement siv hauv pob zeb, yog li txo cov pa roj carbon dioxide emissions thaum lub sijhawm tsim khoom thiab ua raws li kev tiv thaiv ib puag ncig ntawm cov vaj tsev ntsuab.
Lub luag haujlwm ntawm hydroxypropyl methylcellulose hauv pob zeb yog muaj ntau haiv neeg thiab ua tiav, suav nrog ntau yam los ntawm kev tsim kho kev txhim kho kom ruaj khov. Los ntawm kev siv qhov tsim nyog ntawm HPMC, qhov kev ua tau zoo thiab kev tsim kho ntawm cov pob zeb ua tau zoo tuaj yeem txhim kho kom tau raws li cov kev xav tau ntawm kev tsim kho niaj hnub rau cov pob zeb ua haujlwm siab. Nws cov dej tuav tau zoo, lubricity thiab ruaj khov ua rau nws hloov tsis tau ntawm cov khoom siv hauv tsev.
Lub sij hawm xa tuaj: Plaub Hlis-05-2024