Hydroxypropyl methylcellulose yog ib qho uas tsis yog-ionic cellulose ether ua tiav los ntawm cov paj rwb refined los ntawm ntau cov tshuaj tiv thaiv. Nws yog ib qho tsis muaj ntxhiab tsw, tsis muaj tshuaj lom cov hmoov dawb uas yaj hauv dej thiab nthuav tawm Clear los yog me ntsis cloudy colloidal tov. Nws muaj cov yam ntxwv ntawm thickening, dej tuav thiab kev tsim kho yooj yim. Cov tshuaj aqueous ntawm hydroxypropyl methylcellulose HPMC yog qhov ruaj khov nyob rau hauv thaj tsam ntawm HP3.0-10.0, thiab thaum nws tsawg dua 3 lossis ntau dua 10, qhov viscosity yuav txo qis heev.
Lub luag haujlwm tseem ceeb ntawm hydroxypropyl methylcellulose nyob rau hauv cov cement mortar thiab putty hmoov yog dej tuav thiab thickening, uas tuaj yeem txhim kho cov cohesion thiab sag resistance ntawm cov ntaub ntawv.
Cov yam ntxwv xws li kub thiab cua ceev yuav cuam tshuam rau volatilization tus nqi ntawm noo noo nyob rau hauv mortar, putty thiab lwm yam khoom, yog li nyob rau hauv txawv caij, cov dej tuav nyhuv ntawm cov khoom nrog tib tus nqi ntawm cellulose ntxiv yuav kuj muaj ib co sib txawv. Hauv kev tsim kho tshwj xeeb, cov dej tuav cov nyhuv ntawm cov slurry tuaj yeem hloov kho los ntawm kev nce lossis txo tus nqi ntawm HPMC ntxiv. Cov dej tuav ntawm hydroxypropyl methylcellulose HPMC ntawm qhov kub thiab txias yog ib qho tseem ceeb qhia kom paub qhov zoo ntawm HPMC. HPMC zoo heev tuaj yeem daws qhov teeb meem ntawm cov dej tuav hauv qhov kub thiab txias. Nyob rau lub caij qhuav thiab cov cheeb tsam uas muaj qhov kub thiab txias thiab cua kub ceev, nws yog ib qho tsim nyog yuav tsum siv HPMC zoo los txhim kho cov dej khaws cia ntawm slurry.
Yog li ntawd, nyob rau lub caij ntuj sov kev tsim kho, kom ua tiav cov dej tuav cov nyhuv, nws yog ib qho tsim nyog yuav tsum tau ntxiv cov txiaj ntsig zoo HPMC raws li cov qauv, txwv tsis pub yuav muaj teeb meem zoo xws li dej tsis txaus, txo lub zog, tawg. , hollowing thiab shedding tshwm sim los ntawm kev ziab sai heev, thiab tib lub sij hawm kuj nce qhov nyuaj ntawm cov neeg ua haujlwm kev tsim kho. Raws li qhov kub thiab txias, qhov nyiaj ntawm HPMC ntxiv tuaj yeem txo qis, thiab tib cov dej tuav tau tuaj yeem ua tiav.
Hauv kev tsim cov khoom siv hauv tsev, hydroxypropyl methylcellulose yog ib qho khoom siv tsis tau. Tom qab ntxiv HPMC, cov khoom hauv qab no tuaj yeem txhim kho:
1. Kev tuav dej: Txhim kho cov dej tuav, txhim kho cov cement mortar, cov hmoov qhuav qhuav sai heev thiab cov dej tsis txaus ua rau cov tawv tawv tsis zoo, tawg thiab lwm yam tshwm sim.
2. Adhesiveness: Vim yog kev txhim kho plasticity ntawm mortar, nws tuaj yeem ua tau zoo dua rau cov substrate thiab adherend.
3. Los tiv thaiv sagging: Vim nws cov nyhuv thickening, nws tuaj yeem tiv thaiv qhov slippage ntawm mortar thiab adhered khoom thaum lub sij hawm tsim kho.
4. Kev ua haujlwm tau zoo: Ua kom cov yas ntawm cov mortar, txhim kho kev lag luam ntawm kev tsim kho thiab txhim kho kev ua haujlwm.
Post lub sij hawm: Apr-12-2023