Siv cov tshuaj cellulose HPMC (HydroxyPropyyl methylcelulose) nyob rau creat cug muaj ntau cov txiaj ntsig, uas ua rau HPMC ib qho ntxiv ntxiv hauv kev tsim kho. HPMC feem ntau yog lub luag haujlwm ntawm thickening, lubricalen, brication, li kev txhim kho kev tsim kho kev tsim kho thiab qhov zoo ntawm cov khoom kawg.
1. Dej khaws cia
Cov dej tuav tseg ntawm HPMC yog ib qho ntawm nws cov yam ntxwv tseem ceeb tshaj plaws. Hauv cov colp cug, dej ceev ceev yog hais txog lub peev xwm ntawm cov khoom los khaws cov dej noo. Qhov no muaj qhov cuam tshuam tseem ceeb ntawm kev ua yeeb yam ntawm cug. HPMC tuaj yeem txo cov dej poob thaum kev tsim kho thaum nce dej ua kom nce cov dej tshuaj khib nyiab, yog li ua kom muaj kev ua haujlwm ntawm lub tshuaj khib. Cov txiaj ntsig tseem ceeb ntawm dej khaws cia muaj xws li:
Kev qhib lub sijhawm qhib ntxiv: Txij li thaum dej evaporates ntxiv qeeb dua, cov neeg ua haujlwm muaj ntau lub sijhawm los kho thiab ua cov tshuaj khib nyiab, tshwj xeeb tshaj yog huab cua qhuav lossis dej qhuav.
Tiv thaiv kev tawg: thaum lub sij hawm muaj me qhuav poob dej yog lub ntsiab ua rau tshuaj khib tawg. HPMC tuaj yeem khaws cov dej kom zoo thiab txo qhov tshwm sim ntawm shrinkage cracks.
Kev ua kom zoo dua ntawm kev saib xyuas: kev txuag cov dej zoo uas muaj cov dej ntshiab txaus rau kev tu lub zog thaum ntxov, yog qhov ua kom muaj zog kawg thiab lub zog ua kom muaj sia.
2. Kev ua haujlwm
Txhim kho kev tsim kho kev tsim kho yog lwm lub luag haujlwm tseem ceeb ntawm HPMC hauv cov cement cug. Tshwj xeeb:
Txhim kho txoj kev ua haujlwm: HPMC tuaj yeem nce cov plug cov plug, ua kom yooj yim rau kis thiab qib kev tsim kho, uas yog qhov tseem ceeb rau kev siv phab ntsa, thiab theem phab ntsa.
Lubricating nyhuv nyhuv: HPMC tuaj yeem txo qhov kev sib xyaw ntawm cov tshuaj khib nyiab, ua rau cov tshuaj khib me me ntawm cov cuab yeej siv, txhim kho kev tsim kho thiab txo cov khoom hnav.
Los tiv thaiv: Thaum tsim ntawm qhov chaw ntsug, HPMC tuaj yeem txhim kho cov nplaum thiab kev tawm tsam cug tshuaj khib, tiv thaiv kev tshuaj khib ntawm zawv zawg lossis ntws vim lub ntiajteb txawj nqus.
3. Cov Hluav Taws Xob
HPMC muab Ceg cais cov khoom khov kho zoo heev, uas yog qhov tshwj xeeb tshaj plaws rau qee cov khoom lag luam tshwj xeeb, kho cov khoom lag luam ua nplais, thiab lwm yam):
Txhim Kho Cov Lus Qhia: Ntxiv ntawm HPMC tuaj yeem tsim cov nplaum nplaum uas muaj zog ntawm lub cug cug thiab cov txheej txheem substrate, li txhim kho cov nyhuv ntawm lub tshuaj khib.
Txo cov khoom nqus dej: cov khoom siv nplaum txhim kho tuaj yeem tiv thaiv cov nplaum txheej txheem los ntawm delaminating thiab yaug thaum nws qhuav lossis ntxhov siab.
Ua kom muaj zog shear: hauv qee cov ntawv thov uas yuav tsum tau tiv thaiv cov kev mob siab rau ntawm lub tshuaj khib, yog li txhim kho tag nrho cov qauv ntawm cov qauv.
4. Txhim kho cov xwm txheej tsim kho
Qhov txiaj ntsig ntawm kev txhim kho kev tsim kho cov mob yog ib qho laj thawj uas nrov nrov, tshwj xeeb tshaj yog nyob rau hauv kev sib txawv ib puag ncig, kev siv HPMC tshwj xeeb yog ib qho tseem ceeb:
Cov txiaj ntsig zoo: HPMC tuaj yeem txo cov dej evaporation hauv qhov chaw qhib thiab lub sijhawm qhib lub sijhawm ntawm lub tshuaj khib.
Cov txiaj ntsig txias hauv huab cua txias: nws pab ua kom cov dej hauv lub tshuaj khib nyiab los tiv thaiv kev kub siab los ntawm kev cuam tshuam txog cov dej ntws tawm ntawm cov mob qis.
5. Txhim Kho Durability
Siv HPMC tuaj yeem txhim kho lub durability ntawm centa cug:
Txhim kho kev tawg: los ntawm kev txhim kho cov dej sib tov
Nce kev tiv thaiv kom khov-thaw cycles: HPMC tuaj yeem txo qhov kev sib xyaw ntawm cov kab nrib pleb uas tshwm sim thiab tswj cov qauv kev ncaj ncees ntawm cov khoom siv.
Alkalinity Kuj: Hauv qee cov ntawv thov tshwj xeeb, HPMC tuaj yeem muab qee qhov kev tshwj xeeb ntawm alkali tsis kam tiv thaiv xis los ntawm alkali-aggrate cov tshuaj tiv thaiv.
6. Ib puag ncig kev ua yeeb yam
HPMC yog cov khoom siv ib puag ncig uas yuav tsis ua rau muaj kev phom sij rau cov neeg ua haujlwm tsim kho thiab ib puag ncig:
Tsis-toxic thiab tsis muaj zog: HPMC yog cov tsis-ionic cellulose ether uas tsis muaj kev phom sij rau tib neeg lub cev thiab ib puag ncig.
Degradable: HPMC yog biodegradable thiab yuav tsis ua rau lub sij hawm ntev kom muaj kuab paug rau ib puag ncig.
7. Kev Lag Luam
Txawm hais tias tus nqi ntawm HPMC yog qhov tseem ceeb, nws txoj kev lag luam tau cuam tshuam hauv nws qhov kev txhim kho tsim kho tau zoo thiab qhov zoo ntawm cov khoom kawg:
Txo cov nqi txo qis dua: Txij li HPMC tuaj yeem txhim kho kev ua tau zoo ntawm cug, ua haujlwm los ntawm tshuaj txhaj teeb meem kev ua haujlwm raug txo, yog li txo tus nqi.
Khaws cov ntaub ntawv: cov khoom tsim kho kom zoo dua thiab ua kom cov khoom siv khi ua kom cov khoom siv pov tseg, ua rau kev siv HPMC ntau dua kev lag luam.
Xaiv Xaiv thiab Kev Siv ntawm HPMC
Thaum xaiv HPMC, nws yog qhov tsim nyog los xav txog cov tsis xws li viscosity, degree hloov chaw, thiab loj me me. Cov xwm txheej no ncaj rau kev ua haujlwm ntawm HPMC hauv Cangle Cug:
Viscosity: Ntau dua viscosity feem ntau nqa dej zoo dua thiab tsim kev ua haujlwm, tab sis yuav txo cov kev ua haujlwm ntawm cug. Yog li ntawd, nws yog ib qho tsim nyog los xaiv cov qib viscosity tsim nyog raws li daim ntawv thov tshwj xeeb.
Degree ntawm hloov chaw: cov qib hloov pauv hloov rau cov solubility thiab ua haujlwm ntawm HPMC. Cov degree tsim nyog ntawm hloov chaw tuaj yeem ua kom cov kev faib tawm uas tsis zoo thiab ua haujlwm ntawm HPMC hauv lub tshuaj khib.
Qhov loj me me: Ib qhov loj me loj tuaj yeem ua HPMC yooj yim dua los sib tov tusyees nrog lub tshuaj khib thiab txhim kho nws cov nyhuv.
Daim ntawv thov ntawm cov zoo ntawm cellulose hpmc hauv centes colling, thaum tseem txhim kho kev tsim kho cov mob thiab kev lag luam. Nws siv tuaj yeem txo cov teeb meem xws li kev tawg thiab poob tawm ntawm lub cug, txuas ntxiv kev pabcuam lub neej ntawm cov khoom siv, thiab muab cov kev daws teeb meem ntau dua ib puag ncig. Hauv kev tsim kho niaj hnub, HPMC tau dhau los ua kev txhawb nqa tsis tau, ua rau txoj kev koom tes tseem ceeb los txhim kho cov ntaub ntawv tsim tsev thiab ua kom zoo dua qub.
Lub Sijhawm Post: Feb-17-2025