HPMC yog ib qho hypromellose additive nyob rau hauv qhuav mortar. Cellulose ether plays lub luag haujlwm tseem ceeb hauv cov tshuaj khib nyiab qhuav, vim tias qhov ua haujlwm saum npoo av, cov khoom siv cementitious tau zoo thiab sib koom ua ke hauv lub cev, thiab cellulose ether yog ib qho kev tiv thaiv colloid, "Cov ntaub ntawv" ntawm cov khoom siv thiab tsim cov roj nplaum zaj duab xis ntawm lawv txheej txheej ua rau cov mortar system ruaj khov, thiab tseem txhim kho cov txheej txheem ntawm cov dej thiab cov khoom sib xyaw. Lub hypromellose HPMC yog dej-retaining, tiv thaiv ya raws los ntawm evaporating ntxov dhau los yog absorbed los ntawm lub hauv paus chav kawm, xyuas kom meej tias cov cement yog tag nrho hydrated, thiab cov neeg kho tshuab cov khoom ntawm mortar, uas yog tshwj xeeb tshaj yog zoo rau nyias-txheej mortars thiab dej-absorbent puag cov kev kawm, los yog mortars-constructed siab qhuav. Cov dej tuav cov nyhuv ntawm hypromellose tuaj yeem hloov cov txheej txheem kev tsim kho ib txwm muaj thiab txhim kho cov sijhawm tsim kho. Piv txwv li, plastering tuaj yeem nqa tawm ntawm cov khoom nqus dej tsis muaj pre-wetting. Lub viscosity, cov ntsiab lus, ambient kub thiab molecular qauv ntawm hypromellose HPMC muaj feem xyuam rau nws cov dej tuav. Nyob rau tib lub sijhawm, qhov siab dua qhov viscosity ntawm cellulose ether, qhov dej tuav tau zoo dua. Qhov siab dua cov ntsiab lus ntawm cellulose ether, qhov zoo dua cov dej tuav. Thaum cov ntsiab lus ntawm cellulose ether nce mus txog ib qho degree, cov dej tuav tau maj mam nce. Nrog rau qhov nce ntawm ib puag ncig qhov kub thiab txias, cov dej tuav lub peev xwm ntawm cellulose ether feem ntau txo qis, tab sis qee qhov hloov kho cellulose ethers kuj muaj peev xwm tuav dej zoo dua ntawm qhov kub thiab txias. Lub peev xwm tuav dej ntawm cellulose ethers nrog qis dua ntawm kev hloov pauv yog qhov zoo dua. Peb lub tuam txhab tuaj yeem muab hypromellose HPMC dej tuav txoj hauv kev los daws cov cellulose ether dej tuav cov dej tsis zoo.
Post lub sij hawm: Oct-30-2023