HPMC (hydroxypropyl methylcellulose) tau txais txiaj ntsig los ua ib qho ntxiv hauv cov khoom siv hauv tsev vim nws muaj ntau yam thiab ntau yam kev siv.
1. Txhim kho kev tsim kho
HPMC yog ib qho zoo heev dej-soluble polymer nrog siab viscosity thiab dej tuav cov khoom. Ntxiv HPMC rau cov khoom siv hauv tsev tuaj yeem txhim kho lawv txoj kev tsim kho. Piv txwv li, hauv cov cement mortar thiab gypsum-raws li cov ntaub ntawv, HPMC tuaj yeem txhim kho lubricity thiab kev ua haujlwm ntawm cov khoom. Nws ua rau kev sib xyaw ua ke yooj yim dua rau kev thov thiab txo qhov tsis sib xws thaum thov thiab tso, yog li txhim kho kev tsim kho thiab kev tsim kho zaum kawg.
2. Txhim khu kev tuav dej
Kev poob dej hauv cov khoom siv hauv tsev yog ib qho teeb meem tshwm sim thaum tsim kho, tshwj xeeb tshaj yog nyob rau hauv qhov kub thiab txias ib puag ncig. HPMC muaj kev tuav dej zoo heev. Nws tuaj yeem tsim cov txheej txheem molecular hauv cov khoom siv, txo cov evaporation tus nqi ntawm cov dej, yog li ua kom cov khoom ntub. Cov yam ntxwv no yog qhov tseem ceeb tshwj xeeb rau cov khoom siv cement-based, gypsum khoom, thiab lwm yam, vim tias nws tuaj yeem txuas ntxiv lub sijhawm pib ntawm cov khoom siv, xyuas kom meej tias cov khoom muaj sijhawm txaus los ua kom ruaj khov, thiab zam qhov tshwm sim ntawm cov kab nrib pleb.
3. Txhim kho adhesion
HPMC kuj tseem ua lub luag haujlwm tseem ceeb hauv cov khoom siv hauv tsev. Nws tuaj yeem txhim kho lub zog sib txuas ntawm cov cement mortar thiab lwm cov ntaub ntawv hauv paus, yog li txhim kho kev ruaj ntseg ntawm lub tsev qauv. Cov yam ntxwv no tshwj xeeb tshaj yog nyob rau hauv ceramic pobzeb adhesives thiab thermal rwb thaiv tsev tshuab. Hauv cov ntawv thov no, HPMC ua kom muaj kev ruaj ntseg tom qab kev tsim kho thiab ua haujlwm ntev los ntawm kev txhim kho cov khoom sib koom ua ke thiab adhesion rau lub substrate, txo cov kev xav tau ntawm kev kho tom qab.
4. Txhim kho qhov tawg tsis kam thiab shrinkage kuj
Hauv kev tsim vaj tsev, kev ua haujlwm tawg thiab shrinkage kuj yog qhov tseem ceeb cuam tshuam rau kev ua haujlwm ntawm cov khoom siv. Kev taw qhia ntawm HPMC tuaj yeem txhim kho cov khoom zoo no. Vim nws cov dej tuav tau zoo thiab adhesion, HPMC tuaj yeem tswj cov dej evaporation zoo thaum lub sij hawm kho cov khoom, txo cov khoom shrinkage los ntawm dej poob, yog li tiv thaiv kev tawg. Tsis tas li ntawd, HPMC tseem tuaj yeem txhim kho qhov tawv ntawm cov khoom, ua rau cov khoom siv tau zoo dua tuaj yeem tiv taus qhov kev pheej hmoo ntawm kev tawg nyob rau sab nraud.
5. Kev tiv thaiv ib puag ncig thiab kev nyab xeeb
HPMC yog cov tshuaj tsis muaj tshuaj lom thiab tsis muaj kev phom sij uas ua tau raws li qhov xav tau siab tam sim no rau kev tiv thaiv ib puag ncig thiab kev nyab xeeb hauv kev tsim kho kev lag luam. Nws tsis tsim cov khoom tsis zoo thaum tsim khoom, siv thiab pov tseg thiab yog ib puag ncig zoo. Tsis tas li ntawd, daim ntawv thov ntawm HPMC tuaj yeem txo cov nqi ntawm lwm cov tshuaj ntxiv, yog li txo kev pheej hmoo ntawm kev noj qab haus huv rau cov neeg ua haujlwm tsim kho thiab cov neeg siv kawg.
6. Tshuaj tiv thaiv thiab ruaj khov
Nyob rau hauv cov ntaub ntawv tsim kho, tshuaj tiv thaiv thiab kev ruaj ntseg mus sij hawm ntev kuj tseem ceeb rau kev xaiv cov khoom ntxiv. HPMC ua tau zoo ntawm qhov no. Nws muaj kev ruaj ntseg zoo nyob rau hauv ntau yam kua qaub thiab alkali ib puag ncig thiab tsis muaj tshuaj lom neeg degradation, uas muab nws lub neej ntev kev pab cuam nyob rau hauv ntau yam kev siv. Tshwj xeeb tshaj yog nyob rau hauv cov cheeb tsam uas muaj high humidity thiab nquag acid los nag, cov ntaub ntawv uas siv HPMC additives yuav zoo dua tswj lawv cov yam ntxwv thiab kev ua haujlwm zoo.
7. Kev siv dav dav
HPMC yog tsim rau ntau yam khoom siv hauv tsev, nrog rau cov cement-based, gypsum-based thiab txiv qaub-based khoom. Txawm hais tias siv rau pobzeb nplaum, gypsum board, rwb thaiv tsev mortar, lossis cov ntaub ntawv hauv pem teb tus kheej, HPMC tuaj yeem siv nws qhov tshwj xeeb ua haujlwm zoo. Qhov kev siv dav dav no ua rau HPMC yog qhov tseem ceeb ntxiv rau hauv kev tsim kho kev lag luam.
8. Tus nqi zoo
Txawm hais tias tus nqi ntawm HPMC nws tus kheej kuj yuav siab, nws lub luag haujlwm hauv kev txhim kho kev tsim kho kom zoo, txo cov khoom pov tseg thiab txuas ntxiv lub neej tso cai rau tag nrho cov nqi tsim kho kom zoo. HPMC tuaj yeem txo tus lej ntawm kev rov ua haujlwm thaum lub sijhawm tsim kho thiab txo cov nqi kho, yog li txhim kho cov txiaj ntsig kev lag luam ntawm tag nrho cov haujlwm.
9. Txhim kho cov tsos zoo
Thaum kawg, HPMC tuaj yeem txhim kho qhov zoo ntawm cov khoom siv hauv tsev, ua rau lawv smoother thiab flatter. Cov cuab yeej no tseem ceeb tshwj xeeb rau cov ntawv thov xws li cov xim pleev xim zoo nkauj thiab cov phab ntsa sab nrauv uas xav tau qhov zoo ntawm qhov chaw. Los ntawm kev ntxiv HPMC, cov ntaub ntawv hauv tsev tuaj yeem tau txais cov xim sib txawv ntau dua thiab pom kev zoo dua, txhim kho qhov zoo nkauj ntawm lub tsev.
HPMC muaj ntau yam zoo raws li lub tsev khoom additive. Nws tsis yog tsuas yog txhim kho kev tsim kho kev ua tau zoo, txhim kho cov kav ntev thiab ruaj khov ntawm cov ntaub ntawv, tab sis kuj yog ib puag ncig tus phooj ywg thiab nyab xeeb, thiab tuaj yeem ua tau raws li cov kev xav tau ntawm kev tsim kho niaj hnub no rau kev ua haujlwm siab, tsis tshua muaj nqi thiab kev txhim kho ruaj khov. Yog li ntawd, xaiv HPMC raws li ib tug additive rau lub tsev cov khoom yog ib tug ntse txav los txhim kho cov kev ua tau zoo ntawm lub tsev cov ntaub ntawv thiab kev tsim kho kom zoo.
Post lub sij hawm: Sep-03-2024