HPMC (Hydroxypropyl Methylcellulose) yog ib hom dej-soluble polymer tshuaj additive, uas yog dav siv nyob rau hauv kev tsim kho kev lag luam, tshwj xeeb tshaj yog nyob rau hauv cov ntaub ntawv xws li tus kheej-leveling pob zeb thiab plaster. Vim nws qhov tshwj xeeb ntawm lub cev thiab tshuaj lom neeg, HPMC ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua haujlwm ntawm cov khoom siv hauv tsev.
1. Daim ntawv thov ntawm HPMC nyob rau hauv tus kheej-leveling pob zeb
Self-leveling pob zeb yog ib hom pob zeb uas tuaj yeem ntws thiab theem nws tus kheej tau txais, feem ntau yog siv rau kev kho hauv av thiab kho cov haujlwm. Piv nrog rau cov pob zeb ib txwm muaj, tus kheej-leveling pob zeb muaj qis viscosity thiab zoo fluidity, yog li nws tuaj yeem yooj yim sau cov av tsis tu ncua thaum tsim kho. Txawm li cas los xij, cov cement ntshiab thiab lwm yam khoom siv feem ntau tsis tuaj yeem ua kom muaj dej txaus thiab ua haujlwm tau zoo, yog li kev sib ntxiv ntawm HPMC yog qhov tseem ceeb tshwj xeeb.
Txhim kho fluidity: HPMC muaj cov nyhuv fluidity zoo. Nws tuaj yeem tsim cov kab ke ruaj khov colloidal hauv cov khoom siv cement, kom cov pob zeb ua kom muaj dej ntau dua tom qab ntxiv dej, thiab yuav tsis ua rau dej seepage vim dej ntau dhau. HPMC tuaj yeem txhim kho qhov fluidity thiab nthuav dav ntawm tus kheej-leveling pob zeb los ntawm kev cuam tshuam nrog dej, kom ntseeg tau tias nws tuaj yeem npog tag nrho hauv av thaum tsim kho thiab ua tiav cov txiaj ntsig zoo ntawm tus kheej.
Txhim khu kev tuav dej: Cov pob zeb ua rau nws tus kheej yuav tsum tau khaws cov dej kom tsim nyog los tiv thaiv cov kab nrib pleb los ntawm cov dej ntau dhau thaum tsim kho. HPMC tuaj yeem txhim kho cov dej tuav ntawm pob zeb, txo tus nqi ntawm cov dej evaporation, ncua sij hawm tsim kho, thiab xyuas kom meej qhov zoo ntawm tus kheej-leveling pob zeb.
Txhim kho kev ua haujlwm tawg: HPMC tuaj yeem tsim cov qauv sib txuas sib txuas hauv cov pob zeb, uas tuaj yeem cuam tshuam kev ntxhov siab, txo cov kab nrib pleb los ntawm shrinkage, txhim kho qhov tawg ntawm cov pob zeb, thiab txuas ntxiv lub neej kev pab cuam ntawm tus kheej-leveling pob zeb.
Txhim kho adhesion: Hauv kev tsim kho ntawm tus kheej-leveling pob zeb, qhov adhesion ntawm pob zeb thiab lub hauv paus yog qhov tseem ceeb ntawm kev ua tau zoo. HPMC tuaj yeem txhim kho qhov adhesion ntawm tus kheej-leveling pob zeb thiab hauv av, ua kom ruaj khov ntawm cov khoom siv thaum lub sij hawm tsim kho, thiab kom tsis txhob muaj qhov tshwm sim ntawm tev thiab tawg.
2. Daim ntawv thov ntawm HPMC hauv plaster Plaster yog cov khoom siv hauv tsev ua los ntawm cov cement, gypsum, xuab zeb thiab lwm yam khoom siv ntxiv, uas yog dav siv rau phab ntsa kho kom zoo nkauj thiab tiv thaiv. HPMC, raws li cov khoom hloov kho, tuaj yeem txhim kho kev ua tau zoo ntawm plaster. Nws lub luag haujlwm feem ntau yog tshwm sim hauv cov hauv qab no:
Txhim kho kev ua haujlwm: Kev tsim kho ntawm plaster yuav tsum muaj qee lub sijhawm thiab qhov tsim nyog fluidity, tshwj xeeb tshaj yog thaum siv rau cov phab ntsa loj, kev ua haujlwm yog qhov tseem ceeb tshwj xeeb. HPMC tuaj yeem txhim kho qhov fluidity thiab kev ua haujlwm ntawm plaster, ua kom nws zoo ib yam thaum siv, txo qhov adhesion thiab kev tsim kho nyuaj.
Txhim kho cov dej tuav thiab txuas ntxiv tuaj yeem qhib lub sijhawm: Plaster yog qhov ua rau tawg los yog qhov tsis sib xws vim yog dej evaporation sai thaum lub sijhawm thov. Qhov sib ntxiv ntawm HPMC tuaj yeem txhim kho nws cov dej tuav tau zoo, yog li ncua nws lub sijhawm kho, kom ntseeg tau tias cov plaster zoo sib xws thaum siv, thiab tsis txhob tawg thiab tawg.
Txhim kho kev sib khi lub zog: Hauv kev tsim kho plaster, kev sib txuas ntawm lub zog yog qhov tseem ceeb cuam tshuam rau qhov adhesion thiab stability ntawm txheej. HPMC tuaj yeem ua kom lub zog sib txuas ntawm plaster, xyuas kom meej tias cov plaster tuaj yeem txuas ruaj khov rau ntawm qhov chaw substrate, thiab tiv thaiv kom tsis txhob tawg los yog tawg vim yog sab nraud quab yuam lossis kub hloov.
Txhim kho kev ua kom tawg: Plaster tuaj yeem cuam tshuam los ntawm ib puag ncig cov av noo, kub thiab lwm yam hauv lub sijhawm hardening txheej txheem, uas ua rau tawg ntawm qhov chaw. HPMC tuaj yeem txo cov kab nrib pleb uas tshwm sim los ntawm shrinkage thiab kub hloov, txhim kho qhov tawg tsis kam ntawm plaster, thiab txuas ntxiv lub neej kev pab cuam ntawm phab ntsa nto los ntawm kev txhim kho elasticity ntawm cov khoom.
Txhim kho dej tsis kam thiab kav ntev: HPMC tsis tsuas yog txhim kho cov dej tuav ntawm plaster, tab sis kuj txhim kho nws cov dej tsis kam thiab kav ntev. Tshwj xeeb tshaj yog nyob rau hauv qee qhov chaw ntub dej, HPMC tuaj yeem tiv thaiv kev nkag mus ntawm noo noo, txhim kho cov nyhuv dej tsis zoo ntawm plaster, thiab tsis txhob mildew lossis deterioration ntawm phab ntsa tom qab ya raws.
3. Kev ua tau zoo thiab cov nyom ntawm HPMC
Daim ntawv thov ntawmHPMC nyob rau hauv nws tus kheej-leveling qhob thiab plaster muaj ntau yam zoo, feem ntau nyob rau hauv cov nqe lus ntawm nws zoo fluidity kev cai, txhim kho adhesion, thiab txhim kho kev tawg. Txawm li cas los xij, thaum siv HPMC, nws tseem yuav tsum tau ua tib zoo saib xyuas nws qhov kev noj kom tsim nyog thiab sib haum nrog lwm cov tshuaj ntxiv. HPMC ntau dhau tuaj yeem ua rau cov dej ntws ntawm cov pob zeb lossis plaster kom muaj zog heev, uas yuav cuam tshuam rau nws lub zog kawg thiab kev ruaj ntseg ntawm cov qauv. Yog li ntawd, hauv kev siv cov tswv yim, nws yog ib qho tseem ceeb rau kev tswj hwm tus nqi ntawm HPMC siv los xyuas kom meej qhov ua tau zoo ntawm cov khoom siv hauv tsev.
Raws li ib qho tseem ceeb ntawm cov dej-soluble polymer cov ntaub ntawv, HPMC yog dav siv nyob rau hauv tus kheej-leveling pob zeb thiab plaster. Nws tuaj yeem txhim kho fluidity, dej tuav, tawg tsis kam thiab adhesion ntawm cov khoom siv hauv tsev, thiab txhim kho lawv cov kev tsim kho thiab kev ua haujlwm kawg. Txawm li cas los xij, thaum siv HPMC, nws hom thiab ntau npaum li cas yuav tsum raug xaiv raws li qhov xav tau ntawm daim ntawv thov sib txawv thiab cov qauv tsim los ua kom cov khoom ua tau zoo tshaj plaws. Nrog rau kev xav tau ntau ntxiv rau cov ntaub ntawv tshiab hauv kev tsim kho, HPMC yuav txuas ntxiv ua lub luag haujlwm tseem ceeb hauv cov khoom siv hauv tsev xws li tus kheej-leveling pob zeb thiab plaster yav tom ntej.
Post lub sij hawm: Nov-20-2024