MHEC, los yog methylhydroxyethylcellulose, yog ib qho tseem ceeb tshuaj additive lug siv nyob rau hauv lub tsev cov ntaub ntawv. Tshwj xeeb tshaj yog nyob rau hauv cov txheej txheem thiab cov khoom tiav xws li putty thiab plaster, lub luag haujlwm ntawm MHEC yog qhov tseem ceeb heev.
1. Kev ua tau zoo ntawm MHEC hauv putty
Putty yog cov khoom siv los sau cov phab ntsa tsis sib xws lossis lwm qhov chaw. Nws yuav tsum muaj kev tsim kho zoo, lub zog thiab kav ntev. Kev thov ntawm MHEC hauv putty feem ntau suav nrog cov hauv qab no:
ib. Thickening nyhuv
MHEC tuaj yeem ua kom cov viscosity ntawm putty thiab txhim kho nws cov fluidity thiab kev tsim kho. Cov nyhuv thickening no tuaj yeem pab tswj qhov sib xws ntawm putty, ua rau nws yooj yim rau kev thov thiab tuav lub thickness zoo ntawm ntsug qhov chaw tsis muaj sagging. Cov thickening tsim nyog kuj tuaj yeem txhim kho qhov kev ua haujlwm tiv thaiv sag ntawm putty, ua kev tsim kho yooj yim dua.
b. Kev tuav dej
MHEC muaj kev tuav dej zoo, uas yog qhov tseem ceeb rau kev ua haujlwm ntawm putty. Putty siv sijhawm qee lub sijhawm kom qhuav thiab tawv tom qab thov. Yog tias cov dej noo poob sai heev, nws yuav ua rau lub ntsej muag ntawm putty tawg los yog ua hmoov. MHEC tuaj yeem tsim cov yeeb yaj kiab uas khaws cia hauv cov dej hauv putty thiab ua kom cov dej ntws tawm qeeb qeeb, yog li ua kom cov txheej txheem ziab khaub ncaws, txo qhov tsim ntawm cov kab nrib pleb, thiab txhim kho qhov zoo ntawm cov khoom tiav.
c. Txhim kho adhesion
MHEC tuaj yeem txhim kho qhov adhesion ntawm putty, ua kom nws adhesion ntau dua ntawm cov substrates sib txawv. Qhov no yog qhov tseem ceeb rau kev ruaj ntseg thiab durability ntawm putty txheej. Kev adhesion zoo tuaj yeem tsis tsuas yog tiv thaiv lub putty los ntawm kev poob, tab sis kuj ua rau kom muaj kev cuam tshuam ntawm putty thiab txuas nws lub neej kev pab cuam.
2. Kev ua tau zoo ntawm MHEC hauv gypsum
Gypsum yog ib qho khoom siv siv hauv tsev uas muaj hluav taws kub zoo thiab zoo nkauj. Lub luag haujlwm ntawm MHEC hauv gypsum tsis tuaj yeem tsis quav ntsej. Nws cov khoom tseem ceeb yog raws li nram no:
ib. Txhim kho kev ua haujlwm zoo
MHEC txhim kho cov txheej txheem ntawm plaster, ua kom yooj yim rau kev sib xyaw thiab sib kis. Los ntawm kev kho cov viscosity thiab sib xws ntawm gypsum slurry, MHEC tuaj yeem pab cov neeg ua haujlwm tsim kho kom zoo dua cov nyiaj thiab thickness ntawm gypsum thov. Qhov no muaj txiaj ntsig zoo los txhim kho kev tsim kho kev ua haujlwm thiab lub tiaj tus ntawm cov khoom tiav.
b. Txhim kho kev tawg tsis kam
Plaster yog ua rau shrinkage tawg thaum lub sij hawm hardening txheej txheem, uas yuav cuam tshuam rau nws cov tsos thiab kev ua tau zoo. Cov dej tuav kev ua tau zoo ntawm MHEC tuaj yeem ua rau txo qis cov evaporation ntawm cov dej hauv gypsum, txo qhov tsim ntawm kev ntxhov siab sab hauv, yog li txo qhov tshwm sim ntawm cov kab nrib pleb. Tsis tas li ntawd, MHEC tuaj yeem txhim kho qhov yooj yim ntawm plaster, ua rau nws tiv taus rau sab nraud.
c. Txhim kho qhov smoothness
Kev siv MHEC hauv gypsum kuj tuaj yeem txhim kho nws qhov smoothness thiab ua kom cov khoom zoo nkauj zoo nkauj dua. Lub npoo du tsis tsuas yog muaj qhov zoo nkauj zoo nkauj, tab sis kuj muab lub hauv paus zoo dua rau cov xim adhesion, uas pab txhawb cov txheej txheem tha xim tom ntej.
Raws li ib qho tseem ceeb hauv tsev cov khoom siv ntxiv, MHEC qhia ntau yam khoom zoo tshaj thaum siv hauv putty thiab gypsum. Nws tuaj yeem tsis tsuas yog txhim kho kev tsim kho kev ua tau zoo, txhim kho qhov adhesion thiab dej tuav cov ntaub ntawv, tab sis kuj tseem txhim kho qhov tawg tsis kam thiab qhov zoo ntawm cov khoom tiav. Cov khoom no tau ua rau MHEC dav siv hauv kev tsim kho kev lag luam, dhau los ua ib qho tseem ceeb ntawm cov ntaub ntawv xws li putty thiab plaster. Nyob rau hauv lub neej yav tom ntej, nrog rau txoj kev loj hlob ntawm kev tsim kho technology thiab kev txhim kho cov ntaub ntawv uas yuav tsum tau kev ua tau zoo, daim ntawv thov kev cia siab ntawm MHEC yuav dav dua.
Post lub sij hawm: Aug-01-2024