Tus nqi ntawm hydroxypropyf methylcellose (HPMC) hauv cov hmoov putty yog ib qho tseem ceeb uas txiav txim siab qhov ua tau zoo ntawm cov hmoov putty. Tsim Nyog HPMC ntxiv tuaj yeem txhim kho cov haujlwm, dej sib txuas, cov hmoov av tsis txaus, thaum muaj cov hmoov ntau dhau los yuav cuam tshuam rau cov hmoov kawg.
1. Lub luag haujlwm ntawm HPMC hauv cov hmoov putty
HPMC yog ib feem siv dej-soluble polymer nrog cov haujlwm tseem ceeb hauv qab no:
(1) Txhim kho cov dej ua ke
Lub luag haujlwm tseem ceeb HPMC yog txhawm rau txhim kho cov hmoov kav dej ntawm putty, ua rau nws muaj kev tawg thiab ua kom muaj kev tawg thiab ua los ntawm dej evaporation sai sai.
(2) Txhim kho kev ua haujlwm
HPMC tuaj yeem txhim kho lubricity hmoov, ua rau scoother, txo kev tsim kho tsis kam, txhim kho kev tsim kho ntawm cov neeg ua haujlwm.
(3) Txhim kho cov nplaum
HPMC tuaj yeem txhim kho cov nplaum ntawm putty hmoov thiab phab ntsa luj, tiv thaiv cov txheej puy pu kom poob, thiab txhim kho durability.
(4) tiv thaiv zawv zawg
Thaum lub sij hawm facade tsim kho, HPMC tuaj yeem tiv thaiv putty hmoov los ntawm kev cog lus vim kev sib tsoo, txhim kho kev tsim kho, tshwj xeeb yog tsim cov khaubncaws sab nraud.
2. Qhov xwm txheej cuam tshuam HPMC
Qhov ntau ntawm HPMC cuam tshuam los ntawm ntau yam, suav nrog cov fricula ntawm putty hmoov, tsim ib puag ncig, thiab qhov zoo ntawm HPMC.
(1) cov qauv ntawm putty hmoov
Putty hmoov feem ntau yog tsim ntawm cov calcium hnyav (calcium carbonate), ob chav yoov, kua nplaum, kua nplaum muaj cov sib txawv rau HPMC. Piv txwv li, cov zaub mov tso cai sement putty yuav tsum tau haus dej ntau rau nws cov tshuaj tiv thaiv hydration, yog li tus nqi HPMC siv yuav yog qhov siab.
(2) Ib puag ncig kev tsim kho
Qhov kub thiab txias, av noo, thiab dej nqus tus nqi ntawm lub hauv paus txheej tseem cuam tshuam rau HPMC siv. Nyob rau hauv ib qho kub thiab txias thiab qhuav ib puag ncig, kom tsis txhob muaj dej evaporation ntau, nws yog feem ntau tsim nyog los nce ntau npaum li cas HPMC.
(3) HPMC Zoo
HPMC ntawm cov hom sib txawv thiab cov qauv muaj cov khoom sib txawv xws li cov viscosity, hloov pauv, thiab muaj cov txiaj ntsig zoo, thiab muaj cov hmoov sib txawv. High-viscosity HPMC muaj dej zoo dua, tab sis nws yuav cuam tshuam rau kev ua haujlwm, yog li nws yog ib qho tsim nyog los xaiv tus qauv tsim nyog raws li qhov xwm txheej tshwj xeeb.
3. Pom zoo noj tshuaj HPMC
Qhov kev pom zoo ntawm HPMC feem ntau sib txawv raws li hom putty putty:
(1) Sab hauv Phab Ntsa Putty hmoov
Qhov kev pom zoo ntawm HPMC feem ntau yog 0.2% ~ 0.5% (txheeb ze rau tag nrho qhov loj ntawm cov hmoov uas muaj zaub mov). Yog tias visccosity ntawm HPMC yog qhov siab, cov kev pom zoo muab tau muab ze rau tus nqi qis; Yog tias viscosity yog tsawg, nws tuaj yeem yog nce ntxiv.
(2) phab ntsa sab nrauv Puty hmoov
Phab Ntsa Sab Nrauv Muab Putty yuav tsum muaj huab cua tsis kam zoo dua qub, yog li tus mob HPMC zoo dua li ntawm 0.3% ~ 0.6% los txhim kho dej tuav thiab adhesion.
(3) tuab txheej putty
Kom tuab txheej tag nrho cov putty, txhawm rau tiv thaiv kom tsis txhob muaj dej nrawm thiab tawg, tus nqi HPMC ntxiv tuaj yeem nce ntxiv, feem ntau ntawm 0.4% thiab 0.7%.
4. Kev ceev faj
(1) Zam kev ntxiv ntau ntxiv
Ntxiv ntau dhau HPMC tuaj yeem ua rau cov hmoov viscosity ntawm cov hmoov putty kom tau siab dhau, thiab txawm tias cuam tshuam lub zog tom qab kho lossis hmoov.
(2) Xaiv tus qauv zoo
HPMC nrog cov viscosities txawv yog haum rau ntau hom putty hmoov. Piv txwv li, HPMC nrog qis viscosity (400-20,000 tus qauv sab hauv putty (75,000-100,000500,000 ulfter phab ntsa putty lossis tuab txheej tsim putty.
(3) Tsim kom muaj kev cuam tshuam tsim nyog thiab kev sib cais
HPMC yuav tsum yog tusyees dispersed thaum lub sijhawm tsim khoom kom tsis txhob agglomeration tshwm sim los ntawm kev ntxiv mus rau hauv dej. Nws raug nquahu kom ntxiv maj hauv kev nrawm nrawm, lossis siv cov txheej txheem ua ntej tsim kom sib xyaw nrog lwm cov hmoov thiab tom qab ntawd ntxiv dej ntws.
(4) siv nrog lwm cov khoom sib ntxiv
HPMC feem ntau siv hauv kev sib xyaw nrog lwm cov khoom sib ntxiv ether, redispersible looj hmoov, thiab lwm yam) kom ua tau zoo ntawm cov hmoov.
Tus nqi HPMC hauv cov hmoov putty yog qhov tseem ceeb cuam tshuam rau kev ua haujlwm thiab kev ua tiav ntawm cov khoom tiav. Feem ntau hais lus, nws qhov kev sib ntxiv yog nyob ntawm 0.2% thiab 0.6%, uas yog kho tau raws li cov mis tshwj xeeb thiab kev tsim kho cov kev tsim kho. Thaum xaiv HPMC, nws yog cov qib hloov chaw thiab lwm yam ntxwv muaj zog muaj kev khaws cia, kev ua kom zoo nkauj thiab kev tsim kho. Nyob rau tib lub sijhawm, kev sib xyaw tsim nyog nrog lwm cov kev sib ntxiv thiab cov qauv kev faib tawm kom yog tau ua kom tau zoo tshaj plaws ntawm HPMC, yog li kev txhim kho cov hmoov zoo tag nrho ntawm cov hmoov zaub mov.
Lub Sijhawm Post: Feb-14-2025