Carboxymethyl cellulose CMC, sodium carboxymethyl starch (CMS), tus nqi kuj pheej yig (los ntawm kev ua tau zoo ntawm cov khoom nws tus kheej, CMC yog qib qis dua Fuying HPMC), carboxymethyl cellulose yog siv rau qib qis putty hmoov rau sab hauv phab ntsa ntawm lawv. , cov dej tuav thiab ruaj khov yog qhov phem dua li ntawm hydroxypropyl methylcellulose, yog li nws tsis tuaj yeem siv rau hauv cov dej tsis muaj dej thiab cov thermal rwb thaiv tsev sab nraud.
Ntau tus neeg xav tias cov celluloses no yog alkaline, thiab cov cement thiab txiv qaub calcium hmoov kuj yog alkaline, thiab lawv xav tias lawv tuaj yeem siv ua ke, tab sis carboxymethyl cellulose thiab sodium carboxymethyl starch tsis yog ib qho khoom, thiab chloroacetic acid siv hauv lawv cov txheej txheem ntau lawm. Nws yog acidic, thiab cov khoom seem nyob rau hauv cov txheej txheem ntawm cellulose ntau lawm react nrog cement thiab txiv qaub calcium hmoov, yog li lawv tsis tuaj yeem ua ke. Ntau lub tuam txhab tau raug kev puas tsuaj loj vim qhov no, yog li kev saib xyuas yuav tsum tau them. Kev siv carboxymethyl cellulose thiab hydroxypropyl methyl cellulose tsuas yog zoo sib xws, tab sis lawv cov dej num txawv heev, thiab cov kev qhia ntawm ob qhov sib txawv. Cov ntaub ntawv tseem ceeb ntawm ob yog tib lub paj rwb refined, tab sis lawv cov ntaub ntawv pabcuam, cov khoom siv ntau lawm, thiab cov txheej txheem ntws sib txawv. Cov cuab yeej tsim khoom thiab txheej txheem ntawm hydroxypropyl methylcellulose yog qhov nyuaj dua. Qhov ob tsis yog txheej txheem ntau lawm, thiab lwm yam khoom siv kuj sib txawv, yog li kev siv kuj txawv. Lawv tsis tuaj yeem hloov tau, thiab tsis tuaj yeem ua ke nrog ib leeg los txo cov nqi.
Hydroxypropyl methylcellulose (hpmc) muaj cov tshuaj muaj zog ruaj khov, tiv thaiv kab mob mildew, kev tuav dej zoo tshaj plaws thiab cov nyhuv thickening, thiab tsis cuam tshuam los ntawm pH hloov. Lub viscosity ntawm 100,000 yog haum rau putty hmoov, thiab lub viscosity ntawm 150,000 rau 200,000 yog haum rau putty hmoov. Nyob rau hauv mortar, nws tsuas yog nce cov cuab yeej leveling thiab constructability, thiab yuav txo tau cov cement.
Lub luag haujlwm yog tias cov cement mortar muaj lub sij hawm solidification, thiab nws yuav tsum tau khaws cia thaum lub sij hawm solidification, thiab nws yuav tsum tau muab nrog dej kom nws moist. Vim yog cov dej tuav cov nyhuv ntawm cellulose, cov dej yuav tsum tau rau cov cement mortar solidification yog lav los ntawm cov dej tuav ntawm cellulose, yog li cov nyhuv solidification tuaj yeem ua tiav yam tsis muaj kev saib xyuas.
Post lub sij hawm: Apr-21-2023