HPMC (Hydroxypropyl Methylcellulose) yog ib qho khoom siv dav siv hauv cov khoom siv hauv tsev, tshwj xeeb tshaj yog nyob rau hauv cov ntaub ntawv hauv tsev xws li gypsum plaster. HPMC yog non-ionic cellulose ether tsim los ntawm reacting natural paj rwb cellulose nrog sodium hydroxide thiab ces etherifying nws nrog methyl chloride thiab propylene oxide. Vim nws cov khoom zoo heev, HPMC tau siv dav hauv kev tsim kho kev lag luam tshwj xeeb hauv cov khoom siv gypsum.
Cov khoom thiab cov yam ntxwv ntawm HPMC
Thickening nyhuv: HPMC tuaj yeem ua kom cov viscosity ntawm gypsum plaster, ua kom sib tov yooj yim dua thaum siv. Cov nyhuv thickening tsis tsuas yog pab txhawb kev ua haujlwm ntawm qhov sib tov, tab sis kuj txhim kho nws cov adhesion rau substrate.
Kev tuav dej: Hauv gypsum plaster, HPMC ua raws li tus neeg saib xyuas dej, ua kom cov dej hauv cov khoom sib xyaw los ntawm evaporating yooj yim. Cov cuab yeej no ua lub luag haujlwm tseem ceeb hauv kev tsim kho ntawm gypsum plaster, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig qhuav, tiv thaiv ntxov ntxov hardening los yog tawg vim sai sai ntawm noo noo.
Txhim kho kev tsim kho: Lubricity ntawm HPMC tuaj yeem txhim kho qhov fluidity thiab kev sib kis ntawm cov khoom siv, yog li txo qhov tsis kam ntawm kev tsim kho thiab ua kom yooj yim rau cov plaster kom sib npaug.
Lub sijhawm teem sijhawm ncua sijhawm: HPMC tuaj yeem ncua sijhawm pib lub sijhawm ntawm gypsum plaster, muab cov neeg ua haujlwm tsim kho lub sijhawm ua haujlwm ntev dua los kho thiab kho. Qhov no feature yog tshwj xeeb tshaj yog tseem ceeb nyob rau hauv loj cheeb tsam kev tsim kho los yog complex-shaped phab ntsa kho.
Lub luag haujlwm ntawm HPMC hauv gypsum plaster
Txhim kho adhesion: HPMC ua rau cov gypsum plaster ua kom ruaj khov rau lub substrate nto thaum lub sij hawm thov, txawm tias nws yog phab ntsa, qab nthab lossis lwm qhov chaw hauv tsev, muab cov khoom sib txuas zoo thiab tiv thaiv cov plaster los ntawm tev lossis tawg.
Txhim khu kev tiv thaiv kab mob: Vim tias HPMC muaj cov khoom tuav dej zoo heev, nws tuaj yeem txo cov evaporation ntau dhau ntawm cov dej, yog li zam qhov tsis sib xws ntawm cov gypsum plaster thaum lub sij hawm ziab, txo qhov tshwm sim ntawm cov kab nrib pleb, thiab txhim kho cov kav ntev ntawm cov khoom kawg.
Txhim kho sag tsis kam: Hauv qee qhov kev tsim kho ntsug, tshwj xeeb tshaj yog phab ntsa plastering, lub xub ntiag ntawm HPMC tuaj yeem tiv thaiv lub plaster los ntawm kev zawv zawg vim yog lub ntiajteb txawj nqus, txhim khu kev ruaj ntseg ntawm cov sib tov kom nws tuaj yeem ua tau zoo dua rau qhov chaw ntsug lossis kab nqes. nto.
Txhim kho hnav thiab tiv thaiv Frost: HPMC muab gypsum plaster ntau dua rau kev puas tsuaj rau lub cev thiab khov-thaw tsis kam nyob rau hauv qhov chaw qis. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog rau kev tsim kho sab nraum zoov lossis kev siv hauv qhov chaw ntub dej.
Kev siv thiab ib puag ncig tus phooj ywg ntawm HPMC
HPMC nws tus kheej yog ua los ntawm cov khoom siv ntuj tsim paj rwb cellulose thiab muaj biodegradability zoo thiab ib puag ncig tus phooj ywg. Raws li cov khoom tsis muaj tshuaj lom thiab tsis muaj mob, HPMC yuav tsis ua rau muaj kev phom sij rau cov neeg ua haujlwm tsim kho thiab ib puag ncig. Yog li ntawd, HPMC kuj yog ib qho kev xaiv zoo tshaj plaws hauv kev tsim khoom thiab siv cov khoom siv vaj tsev ntsuab.
Kev ceev faj thaum siv HPMC
Tsim nyog proportioning: Nyob rau hauv cov txheej txheem ntawm kev npaj ntawm gypsum plaster, tus nqi ntawm HPMC ntxiv yuav tsum tau proportioned raws li cov kev tsim kho thiab cov yam ntxwv ntawm cov khoom. HPMC ntau dhau los yog tsawg dhau tuaj yeem cuam tshuam qhov kev ua tau zoo ntawm qhov sib tov, piv txwv li, qhov viscosity siab dhau tuaj yeem ua rau muaj teeb meem hauv kev tuav, thaum tsis txaus viscosity yuav ua rau tsis zoo adhesion.
Hloov tau mus rau qhov chaw sib txawv: HPMC cov dej tuav thiab lub sijhawm ua haujlwm tsis zoo ua rau nws haum rau ntau yam kev nyab xeeb, tab sis nyob rau hauv ib puag ncig nrog cov av noo ntau dua lossis qis dua, cov qauv siv yuav tsum tau hloov kho kom ruaj khov.
Cia thiab tuav: HPMC yuav tsum muab cia rau hauv qhov chaw qhuav, qhov cua kom deb ntawm cov dej noo thiab kub kom ntseeg tau tias nws cov khoom xyaw nquag tsis cuam tshuam. Thaum siv, yuav tsum tau saib xyuas kom tsis txhob muaj qhov nqus dej ntau dhau kom tsis txhob cuam tshuam nws txoj haujlwm.
Kev ua lag luam thiab kev loj hlob zeem muag ntawm HPMC
Raws li kev tsim kho kev lag luam qhov kev thov rau kev ua haujlwm siab, ntau cov khoom siv hauv tsev nce, daim ntawv thov kev cia siab ntawm HPMC hauv gypsum plaster yog qhov zoo heev. Nws tsis tsuas yog txhim kho tag nrho cov kev ua tau zoo ntawm cov khoom siv hauv tsev, tab sis kuj ua raws li cov ntsiab lus ntawm lub tsev ntsuab thiab ib puag ncig zoo. Nyob rau tib lub sijhawm, nrog rau kev nce qib ntawm cov thev naus laus zis, cov txheej txheem tsim khoom ntawm HPMC yuav txhim kho ntxiv thiab cov nqi yuav tsum raug txo qis, txhawb nqa nws txoj kev siv dav hauv kev tsim kho kev lag luam.
Raws li ib qho tseem ceeb ntxiv hauv gypsum plaster, HPMC muaj ntau yam zoo heev xws li thickening, dej tuav, thiab ncua sij hawm ua hauj lwm. Nws tuaj yeem txhim kho kev tsim kho kev ua tau zoo thiab ua haujlwm ntev ntawm cov ntaub ntawv gypsum. Nws cov yam ntxwv zoo ib puag ncig thiab tsis muaj tshuaj lom kuj ua rau nws yog ib qho ntawm cov khoom siv tsis tseem ceeb hauv kev lag luam niaj hnub tsim. Nyob rau yav tom ntej ntawm kev tsim cov khoom siv hauv tsev, HPMC xav tias yuav ua lub luag haujlwm tseem ceeb dua thiab txhawb ntxiv kev txhim kho thev naus laus zis thiab kev txhim kho cov khoom siv hauv tsev.
Post lub sij hawm: Sep-30-2024