Lub luag haujlwm ntawm hydroxypropyl methyl cellulose hauv cov av ntub

Lub luag haujlwm ntawmHPMChauv cov av nplaum ntub

Cov tshuaj khib sib xyaw ua ke: Cov tshuaj khib sib xyaw ua ke yog ib hom cement, cov khoom sib xyaw zoo, cov khoom sib xyaw thiab dej, thiab raws li cov yam ntxwv ntawm ntau yam khoom sib xyaw, hauv qee qhov sib piv, tom qab ntsuas ntawm qhov chaw sib tov, sib xyaw, thauj mus rau qhov chaw siv los ntawm lub tsheb thauj khoom, mus rau hauv lub thawv cia khoom tshwj xeeb, thiab siv rau lub sijhawm teev tseg cov khoom sib xyaw ua ke tiav.

Hydroxypropyl methyl cellulose siv ua tus neeg sawv cev khaws dej rau cov cement mortar, retarder mortar pumping. Hauv gypsum ua tus binder los txhim kho daim ntawv thov thiab ntev lub sijhawm ua haujlwm, hydroxypropyl methylcellulose HPMC khaws dej kom cov slurry tom qab ziab yuav tsis nrawm dhau thiab tawg, tawv kom txhim kho lub zog. Kev khaws dej yog ib qho tseem ceeb ntawm hydroxypropyl methyl cellulose HPMC, thiab nws kuj yog qhov txhawj xeeb ntawm ntau tus neeg tsim khoom ntub mortar. Cov yam ntxwv uas cuam tshuam rau kev khaws dej ntawm cov ntub mortar suav nrog qhov ntau ntawm HPMC ntxiv, qhov viscosity ntawm HPMC, qhov zoo ntawm cov khoom me me thiab qhov kub ntawm qhov chaw siv.
Hydroxypropyl methyl cellulose HPMC hauv cov mortar ntub dej muaj peb yam tseem ceeb, ib qho yog qhov tuav dej tau zoo heev, qhov thib ob yog qhov sib xws ntawm cov mortar ntub dej thiab thixotropy ntawm cov nyhuv, qhov thib peb yog kev sib cuam tshuam nrog cement. Cellulose ether dej khaws cia nyob ntawm qhov nqus dej ntawm lub hauv paus, cov khoom sib xyaw ntawm cov mortar mortar, qhov tuab ntawm cov txheej mortar, qhov xav tau dej ntawm mortar, thiab lub sijhawm teeb tsa. Qhov siab dua ntawm hydroxypropyl methyl cellulose pob tshab, qhov zoo dua qhov khaws cia dej.
Cov yam tseem ceeb uas cuam tshuam rau kev khaws dej ntawm cov mortar ntub suav nrog qhov viscosity ntawm cellulose ether, ntxiv cov nqi, qhov loj me ntawm cov khoom me me thiab qhov kub. Qhov viscosity ntawm cellulose ether ntau dua, qhov zoo dua qhov khaws dej. Viscosity yog ib qho tseem ceeb rau kev ua tau zoo ntawm HPMC. Rau tib yam khoom, siv ntau txoj kev los ntsuas qhov viscosity ntawm cov txiaj ntsig sib txawv heev, qee qhov txawm tias los ntawm ob qho. Yog li ntawd, kev sib piv viscosity yuav tsum tau ua nyob rau hauv tib txoj kev xeem, suav nrog qhov kub thiab txias, rotor, thiab lwm yam.

Feem ntau hais lus, qhov siab dua qhov viscosity, qhov zoo dua qhov khaws cia dej. Txawm li cas los xij, qhov siab dua qhov viscosity, qhov siab dua qhov hnyav molecular ntawm HPMC, thiab qhov qis dua qhov solubility ntawm HPMC, uas muaj qhov cuam tshuam tsis zoo rau lub zog thiab kev tsim kho ntawm mortar. Qhov siab dua qhov viscosity, qhov pom tseeb ntau dua qhov thickening nyhuv ntawm mortar, tab sis nws tsis muaj feem cuam tshuam ncaj qha. Qhov siab dua qhov viscosity, qhov ntau dua qhov ntub mortar nplaum, kev ua tau zoo ntawm kev tsim kho, kev ua tau zoo ntawm viscous scraper thiab kev nplaum siab rau lub substrate. Txawm li cas los xij, kev txhim kho ntawm lub zog ntawm cov mortar ntub nws tus kheej tsis tau pab. Ob qho tib si kev tsim kho, kev ua tau zoo tsis pom tseeb anti - dai kev ua tau zoo. Hauv kev sib piv, qee qhov nruab nrab thiab qis viscosity tab sis hloov kho hydroxypropyl methylcellulose muaj kev ua tau zoo heev hauv kev txhim kho lub zog ntawm cov mortar ntub.
Qhov ntau dua ntawm cov cellulose ether PMC ntub dej ntxiv, qhov zoo dua qhov khaws cia dej, qhov siab dua qhov viscosity, qhov zoo dua qhov khaws cia dej. Fineness kuj yog ib qho tseem ceeb ntawm kev ua tau zoo ntawm hydroxypropyl methyl cellulose.
Qhov fineness ntawm hydroxypropyl methyl cellulose kuj muaj qee yam cuam tshuam rau nws cov dej khaws cia. Nyob rau hauv ib txwm muaj xwm txheej, tib viscosity thiab sib txawv fineness ntawm hydroxypropyl methyl cellulose, nyob rau hauv tib tus nqi ntawm kev ntxiv, qhov me me fineness ntawm cov dej khaws cia nyhuv zoo dua.
Hauv cov mortar ntub, ntxiv cov cellulose etherHPMCqis heev, tab sis nws tuaj yeem txhim kho kev ua tau zoo ntawm cov av ntub, yog cov khoom siv tseem ceeb uas feem ntau cuam tshuam rau kev ua tau zoo ntawm cov av ntub. Kev ua tau zoo ntawm cov av ntub yog cuam tshuam los ntawm kev xaiv cov hydroxypropyl methyl cellulose tsim nyog.