HPMC cov tuam txhab - qhov cuam tshuam ntawm HPMC ntawm cov khoom siv gypsum

qhia

Gypsum khoom yog dav siv nyob rau hauv kev tsim kho kev lag luam vim lawv zoo heev fireproof, suab rwb thaiv tsev thiab thermal rwb thaiv tsev zog.Txawm li cas los xij, cov khoom siv gypsum ib leeg tsis tuaj yeem ua tau raws li tag nrho cov kev cai ntawm niaj hnub architecture.Yog li, cov kev hloov pauv xws li hydroxypropyl methylcellulose (HPMC) tau ntxiv rau cov khoom siv gypsum los txhim kho lawv cov kev ua haujlwm, lub zog, dej tuav thiab kav ntev.Hauv tsab xov xwm no, peb tham txog qhov cuam tshuam ntawm HPMC ntawm gypsum khoom.

Txhim khu kev ua haujlwm

HPMC feem ntau yog siv los ua cov thickener lossis defoamer los txhim kho kev ua haujlwm ntawm cov khoom gypsum.Qhov sib ntxiv ntawm HPMC tuaj yeem txhim kho cov khoom siv ntawm cov khoom siv gypsum, txhim khu kev ua haujlwm, thiab yog li tau txais kev tsim kho zoo dua.Ntxiv mus, HPMC tuaj yeem ua kom cov sag tsis kam ntawm cov khoom gypsum, kom ntseeg tau tias cov khoom yuav tsis deform lossis sag thaum lub sijhawm tsim kho.

Txhim kho kev tuav dej

Thaum cov khoom gypsum tov nrog dej, lawv zoo li qhuav sai, uas cuam tshuam rau txoj kev kho thiab qhov kawg ntawm cov khoom.Txhawm rau txhim kho cov dej khaws cia ntawm cov khoom siv gypsum, HPMC tau ntxiv los ua cov ntawv khi.HPMC tsim ib zaj duab xis nyias ntawm qhov chaw ntawm gypsum, uas tuaj yeem khaws cov dej noo hauv cov khoom, txhawb cov txheej txheem hydration, thiab txhim kho lub zog ntawm cov khoom kawg.

nce zog

Qhov sib ntxiv ntawm HPMC tuaj yeem txhim kho lub zog ntawm cov khoom gypsum.HPMC tsim ib zaj duab xis nyias rau ntawm qhov chaw ntawm gypsum hais, uas tuaj yeem sau qhov khoob ntawm cov khoom thiab ntxiv dag zog rau cov qauv ntawm cov khoom.Cov zaj duab xis kuj ua rau kom lub zog sib txuas ntawm cov gypsum hais, ua rau cov khoom muaj zog compressive ntau dua, flexural zog thiab cuam tshuam tsis kam.

durability zoo dua

Lub durability ntawm gypsum khoom yog ib qho tseem ceeb rau nws cov kev ua tau zoo, tshwj xeeb tshaj yog nyob rau hauv cov cheeb tsam ntawm high humidity los yog raug dej.Kev siv HPMC tuaj yeem ua rau cov khoom siv gypsum ua haujlwm tau zoo los ntawm kev tsim cov txheej txheem tiv thaiv ntawm cov khoom, tiv thaiv kev nkag mus ntawm noo noo thiab txhim kho kev tiv thaiv huab cua thiab kev laus.HPMC kuj txo qhov muaj peev xwm ntawm kev tawg thiab txo qhov kev pheej hmoo ntawm delamination.

txo shrinkage

Cov khoom siv gypsum zoo li ntsws thaum kho, uas tuaj yeem ua rau tawg thiab deformation ntawm cov khoom.Los ntawm kev ntxiv HPMC rau cov khoom siv gypsum, qhov shrinkage ntawm cov khoom tuaj yeem txo qis, ua rau cov khoom kawg smoother thiab ruaj khov dua.Tsis tas li ntawd, nws tuaj yeem txo qhov tshwm sim ntawm cov txheej txheem tsis xws luag.

nyob rau hauv xaus

Hauv cov ntsiab lus, kev siv hydroxypropylmethylcellulose (HPMC) ua ib qho kev hloov kho hauv cov khoom siv gypsum tuaj yeem txhim kho lawv cov kev ua haujlwm, lub zog, tuav dej thiab kav ntev.HPMC yog ib qho khoom siv zoo heev uas tsis yog tsuas yog txhim kho cov khoom siv kho tshuab ntawm cov khoom siv gypsum, tab sis kuj tseem pab txuas ntxiv lawv lub neej kev pab cuam thiab txo qhov kev pheej hmoo ntawm warping lossis tawg.Yog li ntawd, nws yog ib qho khoom siv tseem ceeb hauv kev tsim kho kev lag luam thiab nws cov kev siv tau nce ntxiv.