Cov nplaum thiab cov plaster yog cov khoom siv tseem ceeb hauv kev tsim kho, siv rau kev tsim cov nplaim du thiab ua kom muaj kev ruaj khov ntawm cov qauv. Kev ua tau zoo ntawm cov ntaub ntawv no yog cuam tshuam los ntawm lawv cov khoom sib xyaw thiab cov khoom ntxiv uas siv. Methyl Hydroxyethyl Cellulose (MHEC) yog cov khoom ntxiv tseem ceeb hauv kev txhim kho qhov zoo thiab kev ua haujlwm ntawm cov nplaum thiab plaster.
Kev Nkag Siab Txog Methyl Hydroxyethyl Cellulose (MHEC)
MHEC yog ib qho cellulose ether uas tau los ntawm cov cellulose ntuj, hloov kho los ntawm cov txheej txheem methylation thiab hydroxyethylation. Qhov kev hloov kho no ua rau cov cellulose yaj tau hauv dej thiab ntau yam khoom siv, ua rau MHEC yog ib qho khoom siv ntxiv rau hauv cov ntaub ntawv siv hauv kev tsim kho.
Cov Khoom Siv Tshuaj:
MHEC yog tus cwj pwm los ntawm nws lub peev xwm los tsim cov kua nplaum thaum yaj hauv dej.
Nws muaj peev xwm ua zaj duab xis zoo heev, muab ib txheej tiv thaiv uas ua rau kom cov putty thiab plaster ruaj khov dua.
Cov Khoom Siv Lub Cev:
Nws ua rau cov khoom siv cement khaws dej ntau ntxiv, uas yog qhov tseem ceeb rau kev kho kom zoo thiab txhim kho lub zog.
MHEC muab thixotropy, uas ua rau kev ua haujlwm yooj yim dua thiab yooj yim ntawm kev siv putty thiab plaster.
Lub luag haujlwm ntawm MHEC hauv Putty
Cov tshuaj putty siv los pleev xim rau cov phab ntsa thiab qab nthab kom du thiab zoo nkauj. Kev siv MHEC rau hauv cov tshuaj putty muaj ntau yam zoo:
Kev Ua Haujlwm Zoo Dua:
MHEC ua rau kom cov putty nthuav dav tau zoo dua, ua rau nws yooj yim dua rau kev siv thiab nthuav dav nyias thiab sib npaug.
Nws cov khoom thixotropic tso cai rau cov putty kom nyob twj ywm tom qab thov yam tsis muaj sagging.
Kev Khaws Dej Zoo Dua:
Los ntawm kev khaws dej, MHEC ua kom ntseeg tau tias cov putty tseem siv tau ntev dua, txo qhov kev pheej hmoo ntawm kev qhuav ua ntej lub sijhawm.
Lub sijhawm ua haujlwm ntev no ua rau muaj kev hloov kho zoo dua thiab ua kom du thaum lub sijhawm thov.
Kev nplaum zoo tshaj plaws:
MHEC txhim kho cov khoom nplaum ntawm putty, ua kom nws lo rau ntau yam khoom siv xws li pob zeb ua vaj tse, gypsum, thiab cib.
Kev nplaum zoo dua txo qhov yuav muaj kab nrib pleb thiab tawg dhau sijhawm.
Kev Ruaj Khov Ntxiv:
Lub peev xwm tsim zaj duab xis ntawm MHEC tsim ib qho kev tiv thaiv uas ua rau kom lub txheej putty ruaj khov dua.
Qhov kev thaiv no tiv thaiv qhov chaw hauv qab ntawm cov dej noo thiab cov yam ntxwv ib puag ncig, ua rau lub neej ntawm daim ntawv thov putty ntev dua.
Lub Luag Haujlwm ntawm MHEC hauv Plaster
Cov plaster yog siv los tsim cov nto du thiab ruaj khov ntawm phab ntsa thiab qab nthab, feem ntau yog lub hauv paus rau kev ua tiav ntxiv. Cov txiaj ntsig ntawm MHEC hauv cov qauv plaster yog qhov tseem ceeb:
Kev Sib Xws Zoo Dua thiab Kev Ua Haujlwm Tau Zoo Dua:
MHEC hloov kho qhov rheology ntawm plaster, ua rau nws yooj yim dua rau kev sib tov thiab thov.
Nws muab cov qauv zoo sib xws, creamy uas ua rau daim ntawv thov du thiab tsis muaj pob.
Kev Khaws Dej Zoo Dua:
Kev ua kom cov plaster qhuav zoo yuav tsum tau khaws cov dej noo kom txaus. MHEC ua kom cov plaster khaws cov dej tau ntev dua, ua rau cov cement noo tag nrho.
Cov txheej txheem kho kom zoo no ua rau cov txheej plaster muaj zog dua thiab ruaj khov dua.
Txo qhov tawg:
Los ntawm kev tswj qhov ceev ntawm kev ziab, MHEC txo qhov kev pheej hmoo ntawm cov kab nrib pleb uas tuaj yeem tshwm sim yog tias plaster qhuav sai dhau.
Qhov no ua rau muaj qhov chaw plaster ruaj khov dua thiab sib npaug.
Kev nplaum zoo dua thiab kev sib koom ua ke:
MHEC txhim kho cov khoom nplaum ntawm cov plaster, kom ntseeg tau tias nws sib txuas zoo nrog ntau yam substrates.
Kev sib xyaw ua ke zoo dua hauv cov plaster matrix ua rau muaj kev ua tiav zoo dua thiab kav ntev dua.
Cov Txheej Txheem Txhim Kho Kev Ua Haujlwm
Kev Hloov Kho Viscosity:
MHEC ua rau cov kua dej viscosity nce ntxiv, uas yog qhov tseem ceeb rau kev tswj hwm qhov ruaj khov thiab kev sib xws ntawm putty thiab plaster.
Qhov ua kom tuab ntawm MHEC ua kom cov khoom sib xyaws ruaj khov thaum lub sijhawm khaws cia thiab siv, tiv thaiv kev sib cais ntawm cov khoom.
Kev Tswj Xyuas Rheology:
Qhov xwm txheej thixotropic ntawm MHEC txhais tau tias cov putty thiab plaster ua rau muaj kev coj cwj pwm shear-thinning, ua rau tsis nplaum ntau dua thaum muaj kev ntxhov siab shear (thaum lub sijhawm siv) thiab rov qab tau viscosity thaum so.
Cov cuab yeej no tso cai rau kev siv thiab kev tswj hwm cov ntaub ntawv yooj yim, ua raws li kev teeb tsa sai yam tsis muaj sagging.
Kev Tsim Yeeb Yam:
Thaum ziab, MHEC tsim ib daim zaj duab xis uas yoog tau thiab txuas ntxiv mus, uas ua rau lub zog kho tshuab thiab kev tiv taus ntawm cov putty thiab plaster uas siv.
Zaj yeeb yaj kiab no ua haujlwm ua ib qho kev thaiv tiv thaiv cov yam ntxwv ib puag ncig xws li cov av noo thiab qhov kub thiab txias, ua kom lub sijhawm ua tiav ntev dua.
Cov txiaj ntsig ntawm ib puag ncig thiab kev lag luam
Cov Khoom Siv Ntxiv Mus Ntev:
Ua los ntawm cov cellulose ntuj, MHEC yog cov khoom siv biodegradable thiab zoo rau ib puag ncig.
Nws siv pab txhawb rau kev ruaj khov ntawm cov ntaub ntawv tsim kho los ntawm kev txo qhov xav tau cov khoom siv ntxiv thiab txhim kho kev ua tau zoo ntawm cov khoom xyaw ntuj.
Kev Siv Nyiaj Zoo:
Qhov ua tau zoo ntawm MHEC hauv kev txhim kho kev ua tau zoo ntawm putty thiab plaster tuaj yeem ua rau txuag tau nyiaj hauv lub sijhawm ntev.
Kev ruaj khov dua thiab txo qhov yuav tsum tau saib xyuas txo cov nqi tag nrho uas cuam tshuam nrog kev kho thiab kev siv dua.
Kev Siv Hluav Taws Xob Zoo:
Kev txhim kho kev khaws dej thiab kev ua haujlwm tau zoo txo qhov xav tau kev sib tov thiab kev hloov kho ntau zaus, txuag hluav taws xob thiab cov nqi zog ua haujlwm.
Cov txheej txheem kho kom zoo tshaj plaws uas MHEC ua kom ntseeg tau tias cov ntaub ntawv ua tiav lub zog siab tshaj plaws nrog kev siv zog tsawg kawg nkaus.
Methyl Hydroxyethyl Cellulose (MHEC) yog ib qho tseem ceeb hauv kev ua kom zoo dua ntawm kev ua haujlwm ntawm putty thiab plaster. Nws lub peev xwm los txhim kho kev ua haujlwm, kev khaws dej, kev nplaum, thiab kev ruaj khov ua rau nws tsis tseem ceeb hauv kev tsim kho niaj hnub no. Los ntawm kev txhim kho qhov sib xws, cov khoom siv, thiab qhov zoo ntawm putty thiab plaster, MHEC pab txhawb rau kev ua haujlwm hauv tsev zoo dua thiab ruaj khov. Nws cov txiaj ntsig ib puag ncig thiab kev siv nyiaj tsim nyog ua rau nws lub luag haujlwm tseem ceeb hauv cov ntaub ntawv tsim kho. Thaum kev lag luam tsim kho txuas ntxiv mus, kev siv MHEC hauv putty thiab plaster formulations yuav dhau los ua qhov dav dua, tsav kev nce qib hauv kev siv tshuab thiab zoo ntawm kev tsim kho.
Lub sijhawm tshaj tawm: Tsib Hlis-25-2024