HPMC (HydroxyPropyyl methylulose) yog qhov tseem ceeb ntxiv cov tshuaj uas muaj cov khoom lag luam tsis zoo. Nws yog cov tsis-ionic cellulose ither, uas feem ntau tau los ntawm kev hloov tshuaj lom neeg ntawm cov cellulose ntuj.
1. Dej khaws cia
Lub luag haujlwm tseem ceeb ntawm HPMC yog txhawm rau txhim kho cov dej ceev ntawm cug. Qhov no txhais tau tias thaum lub sij hawm ua kom tawv tawv, dej yuav tsis raug tshem tawm sai sai, tab sis yuav raug kaw rau hauv lub collection lub sij hawm ntawm cov cement thiab txhim kho lub zog ntawm cov cement. Qhov no yog qhov tshwj xeeb hauv qhuav, ib puag ncig kub, qhov twg ceev dej poob tuaj yeem ua rau lub cug ua kom tawg thiab tsis muaj zog. HPMC tuaj yeem txo cov dej evapc los ntawm kev sib sau ua cov yeeb yaj kiab tuab, ua kom cov xis nyob thiab txhim kho txhua qhov kev ua tau zoo ntawm lub tshuaj khib.
2. Txhim kho cov khoom lag luam
HPMC tseem tuaj yeem txhim kho qhov ua haujlwm ntawm collch. Nws muab cov tshuaj khib zoo dua, ua kom nws kis tau yooj yim dua thaum siv, txo cov neeg ua haujlwm lub cev kev tsim kho thaum lub sij hawm tsim kho. Nyob rau tib lub sijhawm, HPMC kuj tseem tuaj yeem txhim kho cov sag kam txhim kho ntawm cug, uas yog, siv rau ntawm phab ntsa lossis lwm qhov chaw muag khoom, uas yog qhov tseem ceeb los ua kom ua haujlwm zoo.
3. Adhaesion
Nyob rau hauv cug, hpmc kuj plays lub luag haujlwm hauv kev txhim kho adhesion. Nws tuaj yeem txhim kho txoj kev sib raug zoo ntawm lub tshuaj khib thiab cov khoom siv hauv paus (xws li cib, pob zeb lossis pob zeb ua kom muaj qhov tshwm sim ntawm cov teeb meem xws li hollinging thiab poob tawm. HPMC ua kom pom tseeb tias lub tshuaj khib tau ua kom khov kho rau cov khoom siv hauv paus tom qab kev tsim kho los ntawm kev txhim kho cohesion thiab adhesion ntawm lub cug.
4. Tawg tsis kam
HPMC muaj peev xwm txhim kho qhov tawg tawm ntawm cug. Thaum lub sij hawm ua kom tawv tawv ntawm lub tshuaj khib, shrinkage kev ntxhov siab yuav tshwm sim vim yog cov tshuaj tua kab ntawm cov cement. Tshwj xeeb tshaj yog thaum dej poob yog nrawm dua, qhov kev ntxhov siab no yuav ua rau lub cug ua kab cug kom tawg. HPMC qeeb qeeb cia cov cement los ntawm kev tswj kom muaj qhov tsim nyog ntawm ya raws, yog li txo qhov teeb meem ntawm cov kab nrib pleb. Tsis tas li ntawd, nws txhim kho qhov yooj ntawm cov tshuaj khib, ntxiv txo qhov kev pheej hmoo ntawm kev tawg.
5. Ncua lub sijhawm teem sijhawm
HPMC tuaj yeem ncua lub sijhawm teeb tsa lub sijhawm tshuaj khib, uas muaj txiaj ntsig zoo rau qee qhov kev tsim kho tshwj xeeb. Piv txwv li, huab cua kub lossis qhuav, cov tshuaj khib nriav nrawm nrawm, uas yuav ua rau kev tsim kho kom muaj kev txhim kho lossis kev tsim kho kom zoo rau qhov tsis zoo. Los ntawm kev kho lub sijhawm teem sijhawm, HPMC muab cov neeg ua haujlwm teem sijhawm ntxiv rau kev hloov kho thiab kev ua haujlwm, txhim kho qhov yooj thiab kev txhim kho ntawm kev tsim kho.
6. Txhim Kho Frost Kuj
HPMC kuj tseem tuaj yeem txhim kho cov qos tsis kam ntawm cug. Nyob rau hauv cov huab cua txias, tsis meej cug nws yuav khov yog raug rau cov kub tsawg, cuam tshuam nws lub zog thiab lub zog. HPMC txhim kho lub khov-thaws tsis kam los ntawm kev txhim kho microstructure ntawm cug tshuaj thiab txo qhov kev tsiv teb tsaws thiab khov ntawm noo noo.
7. Kev tiv thaiv ib puag ncig thiab kev nyab xeeb
HPMC yog ib puag ncig phooj ywg thiab kev nyab xeeb ntxiv. Txij li thaum nws tau muab rho tawm los ntawm cov pob zeb ntuj ci thiab siv tshuaj hloov kho, nws tsis yog tshuaj lom, tsis muaj kev phom sij thiab ib puag ncig phooj ywg. Qhov no ua rau HPMC ib qho nrov heev ntxiv hauv kev tsim kho kev tsim kho, tshwj xeeb hauv cov haujlwm uas yuav tsum tau ntsib cov qauv ib puag ncig.
8. Daim ntawv thov nyob rau ntau hom kev tuag
Raws li kab tshuaj txawv txawv (xws li cov ntaub pua plag sib khab huv, plastering cug, tus kheej txoj kev tshuaj khib, thiab lwm yam kev ua tau zoo ntawm HPMC yuav txawv. Piv txwv li, hauv ceramic cov nplais pob zeb ua pob txha, HPMC feem ntau yog siv los xyuas kom cov vuas ruaj khov los ntawm kev txhim kho adhesion thiab swb tsis kam; Hauv kev coj tus kheej, HPMC feem ntau yog siv los kho cov kua dej thiab dej ua kom huv si kom ntseeg tau tias cov tshuaj khib tau tusyees thiab tusyees.
Daim ntawv thov ntawm HPMC hauv kev siv tshuaj coj ua siv tau ntau. Nws tsis tuaj yeem txhim kho kev tsim kho ntawm tshuaj khib, tab sis kuj txhim kho qhov durability thiab siv cov nyhuv ntawm cug. Vim nws cov khoom siv lub cev thiab tshuaj lom neeg tshwj xeeb, HPMC tau dhau los ua qhov tsis taus thiab tseem ceeb ntawm cov khoom siv hauv tsev.
Lub sij hawm Post: Lub Yim Hli 22-2024