HydroxyPropyyl methylcellose (HPMC) yog ib qho cellulose cellulose ether, uas tau siv dav hauv cov khoom siv hauv tsev, tshwj xeeb tshaj yog nyob hauv cug cug. Lub luag haujlwm tseem ceeb HPMC yog txhawm rau txhim kho kev ua haujlwm thiab kev ua tau zoo ntawm cov tshuaj khib ntub los ntawm kev kho lub viscosity, dej tuav thiab tsim kev ua haujlwm ntawm cug.
1. Dej khaws cia
Ib qho ntawm cov luag haujlwm tseem ceeb tshaj plaws ntawm HPMC nyob rau hauv ntub cug yog los txhim kho cov dej rov qab los ntawm cug. Thaum lub sij hawm tsim kho, noo noo ntawm kev tshuaj khib yog yooj yim nqus los ntawm cov khoom siv hluav taws xob yooj yim, uas cuam tshuam rau cov khoom siv tawv nqaij ntau, uas cuam tshuam ntawm cov tshuaj khib nyiab thiab kev tshuaj khib. HPMC muaj cov dej nqus dej zoo, thiab tuaj yeem ua ib zaj duab cug, txo cov tshuaj khib nyiab, thiab ua kom cov kab cug ua kom ntub dej ntev.
Los ntawm kev nce dej rov qab los ua tshuaj khib, hpmc pab txhawm rau txhim kho cov hydration ntawm cov ntseeg lub zog thiab lub zog durabiling ntawm cug. Tshwj xeeb tshaj yog nyob rau hauv qhuav ib puag ncig lossis ntawm substrates nrog cov dej nqus dej muaj zog ntawm HPMC yog qhov tseem ceeb tshaj plaws, uas tuaj yeem tshwm sim los ntawm cov kab tawg thiab tsis muaj zog.
2. Thickening nyhuv
HPMC muaj cov nyhuv tuab dua thiab tuaj yeem ua kom muaj qhov viscosity ntawm ntub cug. Qhov no thickening ua rau lub tshuaj khib muaj kev ruaj khov thiab tsis txhob muaj teeb meem xws li sagging thiab slipping los ntawm kev tshuaj khib nyiab ntev ntawm kev tsim kho.
Cov nyhuv thickening kuj tseem tuaj yeem ua lub tshuaj khib ua tau zoo rau lub substrate, yog li kev txhim kho cov khoom siv ua tau zoo. Ib qho ntxiv, cov khoom tuab tuab ntawm HPMC kuj tseem tuaj yeem pab lwm yam sib xyaw, xws li cov cement, txhim kho cov kev sib xyaw thiab kev sib xyaw ntawm cov tshuaj khib.
3. Txhim kho kev tsim kho kev tsim kho
Daim ntawv thov ntawm HPMC nyob rau hauv ntub cug heev txhim kho nws txoj kev tsim kho. Kev tsim kho cov kev tsim khoom ntawm cov tshuaj khib ntub tau muab los ntawm nws cov kev ua haujlwm yooj yim thiab kev sib xyaw. Qhov kev sib txuas ntawm HPMC ua rau cov tshuaj khib nyiab ua rau muaj qee qhov sib xws tom qab sib tov, uas yooj yim thaum lub sij hawm kev tsim kho thiab yooj yim rau kev thov thiab qib.
Nyob rau tib lub sijhawm, HPMC kuj tseem tuaj yeem txo cov kev sib tov ntawm cort thiab siv cug tshuaj khib, thiab ua kom cov txheej txheem kev tsim kho. Tshwj xeeb tshaj yog nyob rau hauv cov phab ntsa plastering thiab cov nplais sib tsoo, HPMC tuaj yeem ua lub tshuaj khib ua kom lub hauv paus zoo dua qub rau kev tsim kho thiab poob.
4. Txhim kho kev tawm tsam cov cuab yeej sagging
Thaum lub sijhawm tsim kho, tshuaj khib ntub feem ntau yuav tsum tau thov rau ntawm ntsug lossis inclines thaj chaw. Yog tias lub tshuaj khib nyiab dhau lawm, nws yooj yim rau sag, cuam tshuam rau kev siv cov nyhuv thiab npoo tiaj. HPMC tau txhim kho cov khoom siv los tiv thaiv kev tshuaj khib nyiab ntawm nws cov tshuaj khib nyiab, yog li ntawd cov tshuaj khib nyiab tau zoo dua qub tswj hwm nws cov duab thiab txo cov sagging thaum tsim kho.
Qhov no tawm tsam cov cuab yeej no yog tsim nyog rau scenes xws li phab ntsa rwb thaiv tsev cap thiab cov nplaum nplaum uas yuav tsum tau ua kom ntsug lossis ntawm huab hwm siab. Nws tuaj yeem tiv thaiv lub cug ntawm zawv zawg cia, li kev txhim kho kev tsim kho kev tsim kho tau zoo thiab qhov zoo.
5. Ncua lub sijhawm qhib
HPMC tuaj yeem txuas ntxiv lub sijhawm qhib ntawm cov tshuaj khib ntub, lub sijhawm yog, lub sijhawm uas yog cap kuj tseem tuaj yeem tsim nyob rau hauv lub xeev kev sib cav sib haum xeeb. Tom qab kev tsim kho, tshuaj khib yuav maj mam poob dej thiab tawv. Yog tias lub sijhawm qhib tau luv heev, cov neeg ua haujlwm tsim kho tsis tuaj yeem ua tiav kev ua haujlwm hauv lub sijhawm, ua rau kev poob qis. Cov dej khaws cov nyhuv khaws cia ntawm HPMC qeeb ntawm cov dej hauv dej, tso cai rau cov kev tsim kho kom muaj lub sijhawm siv tau ntev dua, ua kom yooj yim dua rau cov neeg ua haujlwm kom haum thiab hloov cov ntsiab lus tsim.
Qhov tshwj xeeb ntawm kev txuas lub sij hawm qhib yog qhov tshwj xeeb rau kev tsim kho loj, uas tuaj yeem txo cov kev sib xyaw ntawm cov tshuaj khib thiab txhim kho kev ua haujlwm zoo thiab zoo.
6. Txhim Kho Kev Tiv Thaiv
Cov dej tuav tseg ntawm HPMC tsis yog pab txuas rau lub sijhawm ua kom zoo ntawm kev sib xyaw ua ke los ntawm kev sib xyaw ua ke ntawm cov dej sib tawg thaum lub sijhawm ua kom qhuav. HPMC ua kom cov pa noo ntawm lub tshuaj khib yog felly faib rau thaum lub zog ua kom pom tseeb ntawm cov capt tsis kam ntawm lub cug.
Qhov kev tawg no tsis kam yog qhov tseem ceeb rau kev siv cov teeb meem plaster thiab tus kheej txoj kev sib xyaw ua ke lub neej ntawm lub tsev thiab txhim kho cov phiaj xwm zoo tshaj plaws.
7. Txhim Kho Cov Ncaws Pob
Kev siv HPMC tuaj yeem txhim kho txoj hlua khi ntawm lub zog ntawm cug cug. Bond lub zog yog cov nplaum ntawm cug thiab cov khoom siv substrate, uas cuam tshuam ncaj qha cuam tshuam rau cov khoom siv zoo thiab cuam tshuam. Los ntawm kev nce cov viscosity thiab dej ceev ceev ntawm cug, hpmc pab txhim kho thaj chaw sib cuag thiab substrate ntawm cov ntaub ntawv xws li cov phab ntsa nplaum thiab sab nraud phab ntsa plaster.
8. Muaj feem xyuam ntawm npuas faib
Lwm lub luag haujlwm ntawm HPMC nyob rau hauv ntub cug yog cuam tshuam rau tiam thiab faib cov npuas. Los ntawm cov kev cai npuas kom zoo, HPMC tuaj yeem ua kom muaj zog thiab ua haujlwm ntawm cov volt hauv cov khoom siv tsis zoo lossis tsis txhob muaj qhov cuam tshuam ntawm kev faib tawm ntawm cov npuas.
HydroxyPropyyl methylcellueculose (HPMC) ua lub luag haujlwm tseem ceeb hauv kev xaiv ntub dej hauv ntau yam. Nws txhim kho cov kev ua tau zoo ntawm cov tshuaj khib ntub los ntawm kev nce dej, thiab kev sib xyaw ntawm cov tshuaj khib, thiab ua kom muaj kev tsim kho zoo thiab ua haujlwm zoo thiab ua haujlwm zoo. Hauv cov ntaub ntawv hauv tsev niaj hnub no, HPMC tau dhau los ua qhov tsis tseem ceeb ntxiv thiab tau siv dav hauv ntau lub tshuab cug los txhim kho kev tsim kho thiab ua kom zoo.
Lub Sijhawm Post: Sep-20-2024