HydroxyPropyyl Metylcellulose (HPMC) yog siv dav ntxiv rau hauv kev tsim kho kev tsim kho, tshwj xeeb tshaj yog cov khoom noj. Nws cov khoom tshwj xeeb ua rau nws tseem ceeb ntawm cov kev siv, los ntawm kev txhim kho kev ua haujlwm kom ua tiav kev ua tau zoo thiab kav ntev.
1. Kev txhais thiab Txheej txheem cej luam ntawm HydroxyPropyyl methylulose
HydroxyPropyl methylcellulose, feem ntau cov npe hu ua HPMC, yog lub cellulose-raws polymer muab tau los ntawm ntoo pulp lossis paj rwb. Nws yog ntau-ua haujlwm ntxiv nrog cov txiaj ntsig txawv, adhesion thiab dej khaws cia. Thaum ntxiv rau cov khoom siv xasas, HPMC ua haujlwm ua tus neeg sawv cev ua haujlwm ntau ntau, cuam tshuam rau cov khoom tshiab thiab tawv tawv ntawm cov sib xyaw.
2. Cov yam ntxwv tshiab ntawm cov khoom siv xiss-based: ua haujlwm kom ua haujlwm thiab rhelology
Ib qho ntawm lub luag haujlwm tseem ceeb ntawm HPMC hauv cov khoom siv Maa-based yog txhawm rau txhim kho kev ua haujlwm. Qhov kev sib txuas ntawm HPMC txhim kho lub zog rheological ntawm cov sib tov, tso cai rau kev tso tawm zoo dua thiab yooj yim. Qhov no yog qhov tshwj xeeb tshaj nyob rau hauv cov ntawv thov xws li pob zeb ua vaj tse thiab cug cov ntawv thov, qhov twg ua haujlwm yog qhov ua haujlwm tseem ceeb.
3. Dej tuav
HPMC ua haujlwm raws li dej tuav tus neeg sawv cev, tiv thaiv cov dej kom dhau los ntawm cov khoom noj kom huv thaum lub sij hawm thaum ntxov ntawm kev kho. Qhov kev tswj kav dej muaj zog pab tswj kev ua kom pom kev zoo dua rau cov Maas hais, txhawb kev txhim kho lub zog thiab kav ntev.
4. Lub zog tawv, lub zog thiab cov khoom siv casent-raws li cov ntaub ntawv
Cov cawv ntawm HPMC ntawm cov khoom tawv tawv ntawm cov khoom siv khov kho yog qhov tseem ceeb. HPMC pab kom nce compressive lub zog ntawm cov pob zeb ua los ntawm kev txhim kho kev ua haujlwm ua haujlwm hauv lub xeev tshiab. Tsis tas li ntawd, cov txheej txheem hydration txhim kho hauv cov duab hluav taws xob, uas ua rau cov khoom siv ruaj khov rau ib puag ncig xws li khov-thaws mus thiab muaj tshuaj lom neeg.
5. Txo cov shrinkage
Cov khoom siv cement raws li feem ntau txo thaum lub sij hawm kho cov txheej txheem, ua rau tawg. HPMC universiates qhov teeb meem no los ntawm kev txo cov dej yuav tsum tau ua ntawm kev sib tov, yog li no nco txog lub peev xwm rau shrinkage cracks. Cov txheej txheem dej ntws tawm tau txhawb los ntawm HPMC pab kom muaj kev ruaj ntseg sab ruaj khov ntawm cov khoom tawv tawv.
6. Adhesion thiab Adhesive Khoom
HPMC pab txhim kho cov khoom ua ke ntawm cov khoom siv xiss-based thiab txhim kho cov nplaum ntawm cov ntaub ntawv thiab ntau hom substrates. Qhov no yog qhov tshwj xeeb tshaj yog nyob rau hauv cov ntawv thov xws li pobzeb cov nplaum thiab plasters, qhov twg cov nyiaj sib tw muaj qhov tseem ceeb rau kev ua haujlwm ntev thiab ua tau zoo ntawm lub tsev.
7. Txhim Kho Cohesion
Ntxiv rau kev txhim kho adhesion, HPMC tseem tuaj yeem txhim kho cohesion ntawm cov khoom nws tus kheej. Qhov no muaj txiaj ntsig zoo rau cov khoom siv ua kom tau raws li cov khoom siv ntsug lossis tswj lawv cov duab thaum siv.
8. Cov kev sib tw thiab kev txiav txim siab ntau npaum li cas thiab kev sib raug zoo
Thaum HPMC muaj ntau yam zoo, nws cov txiaj ntsig zoo nyob ntawm kev siv tau. Siv dhau los lossis siv tsis yog HPMC yuav ua rau muaj kev cuam tshuam tsis zoo xws li ncua sijhawm teem sijhawm lossis txo lub zog. Txuas ntxiv, sib raug zoo nrog lwm cov kev sib ntxiv thiab cov kev ua kom pom tseeb kom ntseeg tau qhov kev ua tau zoo hauv ib daim ntawv thov tshwj xeeb.
9. Kev cuam tshuam rau ib puag ncig
Qhov cuam tshuam ib puag ncig ntawm kev siv HPMC hauv cov ntaub ntawv tsim kho yog kev txhawj xeeb zuj zus. Thaum HPMC nws tus kheej yog biodegradable, tag nrho cov kev ruaj khov ntawm nws kev tsim thiab siv yuav tsum tau txiav txim siab. Cov kws tshawb fawb thiab cov kws tshaj lij tshawb fawb yog tshawb xyuas lwm tus neeg nyiam ua phooj ywg uas tsis muaj kev txiav txim siab ib puag ncig.
Hauv kev xaus
Hauv cov ntsiab lus, hydroxypropyl methylcellulose plays ib lub luag hauj lwm tseem ceeb hauv kev txhim kho cov ntaub ntawv ua haujlwm ntawm cov khoom noj. Los ntawm kev txhim kho kev ua haujlwm thiab dej khaws cia hauv lub xeev tshiab los ua kom muaj zog, durability thiab adhesion nyob rau hauv lub ntiaj teb hardened, HPMC yuav pab txhim kho cov khoom siv hauv tsev. Txawm li cas los xij, kom paub cov peev txheej HPMC thaum ua kom muaj kev tsim kho kev tsim kho kom ruaj khov, kev siv tshuaj, kev sib raug zoo thiab ib puag ncig kev cuam tshuam. Raws li kev tsim kho kev tsim kho txuas ntxiv mus rau kev tsim kho, txuas ntxiv kev txhim kho hauv cov thev naus laus zis, muab cov kev tsim kho kom zoo dua rau cov kev cov kev sib tw tau ntsib kev sib tw.
Lub Sijhawm Post: Kaum-12-2023