Ntub kheej cug xyaw: mixed cug yog ib qho kev sib xyaw ua ke, ua ke ntawm cov khoom sib xyaw, thiab raws li ntsuas ntawm qhov chaw nres tsheb sib xyaw, muab sib xyaw, thauj mus rau qhov chaw uas cov Cov tsheb siv tau siv, thiab nkag mus rau hauv lub khw tshwj xeeb lub thawv thiab siv cov ntim ntub dej tiav rau lub sijhawm tau teev tseg.
HydroxyPropy muag methylcellulose yog siv los ua dej-tuav tus neeg sawv cev rau xis mas retarder rau coll nqus twj. Xws li Gypsum ua cov phau ntawv los txhim kho cov ntawv thov thiab lub sijhawm ua haujlwm ntev dhau los ntawm HPMC tiv thaiv sai sai tom qab ziab, thiab txhim kho lub zog tom qab ua kom tawv. Dej khaws cia yog ib qho tseem ceeb ntawm hydroxypropylulose hpmc, thiab nws kuj yog kev txhawj xeeb ntawm ntau lub tsev tsim hluav taws xob sib xyaw. Yam cuam tshuam rau cov dej ua kom huv ntawm cov nyhuv ntub-sib xyaw ua ke muaj xws li HPMC ntxiv, lub piscosity ntawm cov hais thiab qhov kub ntawm kev siv ib puag ncig.
Muaj peb lub luag haujlwm tseem ceeb ntawm hydroxypropyl methylpcellulose hpmc hauv kev sib xyaw ntub dej, ib qho yog qhov ua kom zoo nkauj, thiab qhov thib peb yog kev sib cuam tshuam nrog cov cement. Cov dej khaws cia ntawm cellulose nyob ntawm cov tshuaj khib nyiab ntawm lub hauv paus, cov dej phwj, cov dej phib tawj, thiab lub sijhawm teeb tsa. Qhov siab dua ntawm cov pob tshab ntawm hydroxypropylencellulose, qhov zoo dua cov dej khaws cia.
Qhov cuam tshuam rau cov dej khaws cia ntawm cov tshuaj khib ntub dej sib xyaw ua ke xws li cellulose engourcosity, ntxiv cov nyiaj, qhov loj me thiab kub. Qhov ntau dua qhov viscosity ntawm cellulose ether, qhov zoo dua cov dej khaws cia. Viscosity yog qhov tseem ceeb parameter ntawm HPMC kev ua tau zoo. Rau tib cov khoom lag luam, cov txiaj ntsig ntawm kev siv cov qauv sib txawv los ntsuas viscosity heev, thiab qee tus txawm muaj ib qho sib txawv. Yog li ntawd, kev sib piv ntawm viscosity yuav tsum tau nqa tawm hauv tib txoj kev xeem, suav nrog kub, ntxaiv, thiab lwm yam, thiab lwm yam
Feem ntau hais lus, ntau dua cov viscosity, qhov zoo dua cov dej khaws cia. Txawm li cas los xij, qhov siab dua viscosity, lub siab dua molecular hnyav ntawm HPMC thiab qis dua cov solubility ntawm HPMC, uas muaj qhov tsis zoo ntawm lub zog thiab kev tsim kho ntawm lub tshuaj khib. Qhov siab tshaj lub viscosity, qhov pom tseeb dua cov nyhuv tuab ntawm cug tshuaj khib, tab sis nws tsis yog ncaj qha cuam tshuam. Qhov siab tshaj lub viscosity, ntau ntau ntau lub vuag tsuag qhuav, qhov zoo dua kev tsim kho kev ua haujlwm, kev ua tau zoo ntawm scraper thiab ntau dua cov nplaum rau lub substrate. Txawm li cas los xij, cov txheej txheem sib xyaw ntawm lub zog ntub nws tus kheej tsis pab. Ob lub chaw tsim khoom tsis muaj kev pom zoo los tiv thaiv kev tiv thaiv. Nyob rau hauv sib piv, qee qhov nruab nrab thiab tsis muaj viscosity tab sis hloov kho hydroxypropylulose tau ua tau zoo heev hauv kev txhim kho lub zog ntawm cov tshuaj khib nyiab ntub dej.
Qhov ntau dua tus nqi ntawm cellulose ether ntxiv rau PMC ntub cap, kom zoo dua cov dej khaws cia, thiab ntau dua cov viscosity, qhov zoo dua cov dej khaws cia. Fineness tseem yog qhov ntsuas tseem ceeb ntawm hydroxyprropyl methellulose.
Lub txiaj ntsig ntawm hydroxypropyyl methylcellulose kuj muaj qee yam cuam tshuam ntawm nws cov dej khaws cia. Feem ntau, rau hydroxypropyl methylulose nrog tib viscosity thiab sib txawv, qhov me dua cov nyhuv khaws cia nyob rau tib tus nqi. zoo dua.
Hauv kev sib xyaw ntub dej sib xyaw, ntxiv rau cov cellulose ether HRMC yog qhov tseem ceeb ntxiv, tab sis nws yog lub ntsiab ntxiv uas yog cuam tshuam rau kev ua yeeb yam ntawm cug. Cov kev xaiv tsim nyog ntawm hydroxypropyl methylcellulose, kev ua yeeb yam ntawm ntub cug yog qhov cuam tshuam heev.
Lub Sijhawm Post: Apr-25-2023