Ntuj Polymer Hydroxypropyl Methylcellulose Rau Cement Based Plaster

Hydroxypropyl methylcellulose (HPMC) yog lub ntuj polymer uas tau siv dav hauv kev tsim kho kev lag luam raws li cov cement-based plaster additive. Nws tuaj yeem siv los ua tus neeg saib xyuas dej, thickener, thiab binder los txhim kho kev ua haujlwm ntawm cov cement-based plasters.

HPMC yog ib tug semi-synthetic, dej-soluble polymer ua los ntawm cellulose. Nws yog muab los ntawm ntuj cellulose los ntawm kev hloov kho tshuaj lom neeg uas muaj kev sib ntxiv ntawm hydroxypropyl thiab methyl pawg. Qhov kev hloov kho no ua rau muaj cov polymer nrog kev txhim kho dej solubility, thermal stability, thiab tshuaj tsis kam.

Kev siv HPMC hauv cement-based plaster formulation muab ntau yam txiaj ntsig xws li:

1. Txhim Kho Kev Ua Haujlwm Zoo: HPMC ua raws li kev hloov kho rheology uas txhim kho kev ua haujlwm thiab kev siv cov khoom ntawm plaster. Nws txhim khu lub adhesion, cohesion, thiab kis ntawm plaster, cia nws yooj yim mus thov rau lub substrate.
2. Txhim Kho Dej Retention: HPMC tuaj yeem nqus tau thiab khaws cov dej ntau, uas pab tiv thaiv cov plaster kom qhuav sai heev. Cov cuab yeej no tseem ua kom ntseeg tau tias plaster tuav nws qhov sib xws thiab ua haujlwm tau ntev dua, txawm tias nyob hauv qhov kub thiab qhuav.
3. Nce Cohesion thiab Adhesion: HPMC tsim ib zaj duab xis nyob ib ncig ntawm cov cement hais, uas txhim kho lawv cohesion thiab adhesion rau substrate. Cov cuab yeej no ua kom ntseeg tau tias cov plaster tseem nyob ruaj khov thiab tsis tawg lossis cais tawm ntawm cov substrate.
4. Txo Cracking: HPMC txhim kho lub zog tensile thiab yoog raws ntawm plaster, txo qhov kev pheej hmoo ntawm kev tawg vim qhov shrinkage lossis nthuav.
5. Txhim kho Durability: HPMC muab cov plaster nrog kev txhim kho dej thiab tshuaj tiv thaiv, ua rau nws ruaj khov thiab tiv taus huab cua thiab kev laus.

Ntxiv nrog rau cov txiaj ntsig no, HPMC kuj tseem yog ib qho kev ruaj ntseg thiab ib puag ncig tus phooj ywg ntxiv uas tuaj yeem pab txo qis ib puag ncig ntawm cov cement-based plasters. Nws yog non-toxic, biodegradable, thiab tsis tso cov tshuaj phem rau hauv ib puag ncig.

Txhawm rau siv HPMC hauv cement-based plasters, nws feem ntau yog ntxiv rau cov cement thiab xuab zeb qhuav ua ntej ntxiv dej. Qhov pom zoo npaum li cas ntawm HPMC nws txawv nyob ntawm seb daim ntawv thov tshwj xeeb thiab cov khoom uas xav tau ntawm plaster. Feem ntau, qhov ntau npaum li cas ntawm 0.2% mus rau 0.5% ntawm HPMC raws li qhov hnyav tag nrho ntawm cov cement thiab xuab zeb tau pom zoo.

HPMC yog cov khoom siv ntau yam thiab muaj txiaj ntsig zoo uas tuaj yeem txhim kho kev ua tau zoo ntawm cov cement-based plasters. Nws lub hauv paus chiv keeb, kev ruaj khov, thiab eco-friendliness ua rau nws yog ib qho kev xaiv zoo rau cov neeg cog lus, cov kws tsim vaj tsev, thiab cov tswv tsev uas ua haujlwm tseem ceeb hauv kev tsim vaj tsev.