HPMC (Hydroxypropyl Methyl Cellulose) thiab HEMC (Hydroxy Ethyl Methyl Cellulose) yog cov cellulose ethers uas feem ntau siv rau hauv cov ntaub ntawv siv hauv kev tsim kho vim lawv cov yam ntxwv tshwj xeeb. Lawv yog cov polymers uas yaj tau hauv dej los ntawm cellulose, ib qho polymer ntuj pom muaj nyob rau hauv cov phab ntsa cell ntawm cov nroj tsuag. HPMC thiab HEMC yog siv ua cov khoom ntxiv rau hauv ntau yam khoom siv hauv kev tsim kho kom txhim kho lawv cov yam ntxwv thiab txhim kho kev ua haujlwm.
Cov hauv qab no yog qee qhov kev siv ntawm HPMC thiab HEMC hauv cov ntaub ntawv siv hauv kev tsim kho:
Cov Nplaum Rau Pobzeb: HPMC thiab HEMC feem ntau raug ntxiv rau cov nplaum rau pobzeb kom txhim kho kev ua haujlwm thiab kev sib txuas ruaj khov. Cov polymers no ua haujlwm ua cov khoom ua kom tuab, muab lub sijhawm qhib zoo dua (lub sijhawm ntev npaum li cas cov nplaum tseem siv tau) thiab txo cov pobzeb sagging. Lawv kuj txhim kho cov nplaum qhov kev sib txuas rau ntau yam substrates.
Cov Cementitious Mortars: HPMC thiab HEMC yog siv rau hauv cov cementitious mortars xws li plasters, plasters thiab exterior insulation finish systems (EIFS). Cov polymers no txhim kho qhov ua haujlwm ntawm cov mortar, ua rau nws yooj yim dua rau kev nthuav dav thiab siv. Lawv kuj txhim kho kev sib koom ua ke, txo qhov nqus dej thiab txhim kho qhov kev sib txuas ntawm cov mortars rau ntau yam substrates.
Cov khoom siv gypsum: HPMC thiab HEMC yog siv rau hauv cov ntaub ntawv gypsum xws li gypsum plasters, cov khoom sib koom ua ke thiab cov txheej txheem hauv qab uas tswj tau tus kheej. Lawv ua haujlwm ua cov neeg sawv cev khaws dej, txhim kho kev ua haujlwm thiab ua kom lub sijhawm teeb tsa ntawm cov khoom ntev dua. Cov polymers no kuj txhim kho kev tiv thaiv kab nrib pleb, txo qhov ntsws thiab txhim kho kev nplaum.
Cov Tshuaj Sib Xyaws Uas Ua Rau Nws Tus Kheej Sib Npaug: HPMC thiab HEMC raug ntxiv rau cov tshuaj sib xyaws uas ua rau nws tus kheej sib npaug los txhim kho cov dej ntws thiab cov khoom sib npaug. Cov polymers no pab txo qhov viscosity, tswj kev nqus dej thiab muab qhov chaw tiav zoo dua. Lawv kuj txhim kho qhov kev sib txuas ntawm cov tshuaj sib xyaws rau lub substrate.
Kev Siv Grouting: HPMC thiab HEMC siv tau rau kev siv grouting rau cov pob qij txha thiab masonry. Lawv ua haujlwm ua cov rheology modifiers, txhim kho kev ntws thiab kev ua haujlwm ntawm cov grouts. Cov polymers no kuj txo cov dej nkag mus, txhim kho kev nplaum thiab txhim kho kev tiv thaiv kab nrib pleb.
Zuag qhia tag nrho, HPMC thiab HEMC yog siv dav hauv cov ntaub ntawv tsim kho vim lawv muaj peev xwm txhim kho kev ua haujlwm, kev nplaum, kev khaws dej, thiab kev ua haujlwm tag nrho ntawm cov khoom. Lawv txhawb nqa kev coj ua zoo dua los ntawm kev txhim kho kev ruaj khov thiab zoo ntawm ntau yam khoom siv hauv tsev.
Lub sijhawm tshaj tawm: Lub Rau Hli-08-2023