Dab tsi yog qhov sib txawv ntawm cov cellulose txawv ntawm plaster ntawm Paris
Ob tus kws tshuaj carboxymethyl cellulose thiab cellulose cellulose tuaj yeem siv cov tshuaj ntsuab, yog li nws tsis haum rau cov plaster ntawm Paris. Tau rov ua tau zoo thiab txo lub zog ntawm plaster ntawm Paris. Methyl cellulose yog qhov zoo tshaj plaws admixature rau gypsum xis kawm ua ke, thiab viscieting, tsuas yog qee yam muaj cov nyhuv retarding thaum cov nqi ntau. siab dua carboxymethyl cellulose. Vim li no, feem ntau gypsum composite cov ntaub ntawv siv cov txheej txheem ntawm txoj kev sib txuasCarboxymethyl cellulosethiabMethyl Cellulose, uas tsis tsuas yog siv sij hawm lawv cov yam ntxwv (xws li cov nyhuv retarding ntawm Methyl Cellulose, qhov kev cuam tshuam ntawm metyl cellulose (xws li lawv cov dej khaws cia thiab lawv cov nyhuv kav thiab siv cov nyhuv thickening). Nyob rau hauv txoj kev no, ob qho dej cia ua kev ua tau zoo ntawm Gypsum cov khoom siv xis thiab cov khoom siv xis nyob tau txhim kho, thaum tus nqi nce nyob ntawm qis tshaj plaws.
Qhov tseem ceeb npaum li cas yog viscosity ntawm methyl cellulose ether rau gypsum tshuaj khib?
Viscosity yog ib qho tseem ceeb ntawm methyl cellulose kev ua tau zoo here.
Feem ntau hais lus, ntau dua cov viscosity, qhov zoo dua cov dej khaws cov nyhuv gypsum. Txawm li cas los xij, qhov siab dua viscosity, lub siab dua molecular qhov hnyav ntawm methyl cellulose muaj kev cuam tshuam tsis zoo rau lub zog thiab kev tsim kho ntawm lub tshuaj khib. Qhov siab tshaj lub viscosity, qhov pom ntau ntxiv rau cov nyhuv tuab rau ntawm lub tshuaj khib, tab sis nws tsis ncaj ncaj ncaj. Qhov siab tshaj lub viscosity, ntau ntau ntau lub volt ntub lub cug yuav. Thaum kev tsim kho, nws yog manifested raws li sticking rau tus scraper thiab siab adhesion rau lub substrate. Tab sis nws tsis muaj txiaj ntsig zoo rau kev nce cov txheej txheem lub zog ntawm lub txiv ntoo qhuav nws tus kheej. Ib qho ntxiv, thaum lub sijhawm kev tsim kho, kev ua haujlwm los tiv thaiv kev ua haujlwm ntub dej ntawm cov cug cug tsis pom tseeb. Ntawm qhov tsis sib xws, qee qhov nruab nrab thiab qis viscosity tab sis hloov kho metyl cellulose cellulose kev ua tau zoo tshaj plaws hauv kev txhim kho lub zog ntawm cov tshuaj khib nyiab ntub dej.
Qhov tseem ceeb ntawm cov cellulose ether tua cug?
Fineness tseem yog ib qho kev ua tau tseem ceeb ntsuas ntawm methyl cellulose ether. MC siv rau cov hmoov huv kom qhuav yuav tsum muaj hmoov nrog cov ntsiab lus dej qis, thiab cov ntsiab lus tseem ceeb yuav tsum muaj 20% txog 60% ntawm cov particle loj kom tsawg dua 63m. Cov txiaj ntsig cuam tshuam rau kev solubility ntawm methyl cellulose ether. Moob Mc feem ntau yog Granular, uas yog qhov yooj yim rau disperse thiab yaj nyob rau hauv dej tsis muaj zog, yog li nws tsis haum rau siv hauv cov hmoov cug. Qee cov khoom lag luam hauv tsev yog flocculent, tsis yooj yim rau disperse thiab yaj hauv dej, thiab yooj yim rau agglomerate. Hauv cov hmoov chot, MC tau tawg ntawm cov khoom siv cov txiv ntoo xws li ua kom zoo nkauj thiab ua kom zoo nkauj thiab tsw qab, thiab tsuas yog siv metyl cellulose agglomeration thaum sib xyaw nrog dej. Thaum MC tau ntxiv nrog dej kom yaj lub agglomerates, nws yog qhov nyuaj heev rau kev ntiab tawm thiab yaj. TxhavMCyog tsis yog pov tseg, tab sis kuj tseem txo lub zog ntawm lub tshuaj khib. Thaum xws li tshuaj pleev ib ce qhuav los ua cov ntawv thov hauv thaj chaw loj, qhov kev kho kom zoo ntawm cov cuttawm lub nroog yuav raug txo qis, thiab cov kab nrib pleb yuav tshwm sim vim muaj kev kho lub sijhawm sib txawv. Rau cov tshuaj khib kab kuab nrog kev tsim kho tshuab, qhov yuav tsum muaj rau kev zoo kawg nkaus yog siab dua vim muaj lub sijhawm sib xyaw luv luv.
Lub txiaj ntsig ntawm MC kuj muaj qee yam cuam tshuam rau nws cov dej khaws cia. Feem ntau hais lus, rau methyl cellulose muaj kev hais nrog tib viscosity tab sis sib txawv tib yam, tus finer qhov zoo dua cov dej ua kom tiav.
Lub Sijhawm Post: Apr-25-2024