Lub luag haujlwm ntawm hydroxypropyl methylcellulose hauv putty
Los ntawm thickening, dej tuav thiab kev tsim kho ntawm peb txoj haujlwm.
Thickening: Cellulose tuaj yeem ua kom tuab kom tshem tawm, ua kom cov tshuaj sib xws thiab sib xws, thiab tiv thaiv sagging. Kev tuav dej: Ua kom cov hmoov putty qhuav maj mam, thiab pab cov tshuaj tiv thaiv cov hmoov tshauv calcium hauv qab dej. Kev tsim kho: Cellulose muaj cov nyhuv lubricating, uas tuaj yeem ua rau cov hmoov putty muaj kev ua haujlwm zoo. Hydroxypropyl methylcellulose tsis koom nrog cov tshuaj tiv thaiv tshuaj thiab tsuas yog ua lub luag haujlwm pabcuam. Putty hmoov yog ntxiv nrog dej rau batch phab ntsa, uas yog tshuaj lom neeg cov tshuaj tiv thaiv, vim hais tias muaj kev tsim cov tshuaj calcium carbonate tshiab. Cov khoom tseem ceeb ntawm cov hmoov tshauv calcium hmoov yog: sib tov ntawm calcium hydroxide Ca (OH) 2, calcium oxide CaO thiab ib qho me me ntawm calcium carbonate CaCO3. Tshauv calcium tsim calcium carbonate nyob rau hauv qhov kev txiav txim ntawm CO2 hauv dej thiab huab cua, thaum hydroxypropyl methyl Cellulose cia li khaws dej thiab pab cov tshuaj tiv thaiv zoo dua ntawm tshauv calcium, uas nws tus kheej tsis koom nrog cov tshuaj tiv thaiv.
Peb thawj zaug txheeb xyuas cov laj thawj ntawm cov hmoov poob ntawm cov khoom siv los ntawm cov khoom siv raw ntawm putty: tshauv calcium hmoov, hydroxypropyl methylcellulose, hnyav calcium hmoov, dej tshauv calcium hmoov.
1. Hauv kev txiav txim siab tiag tiag, nyob rau hauv kev txiav txim siab ceev lub decomposition, kev xam ntsuas kub feem ntau tau nce mus rau 1000-1100 ° C. Vim qhov loj ntawm limestone raw cov ntaub ntawv los yog qhov kub tsis sib xws nyob rau hauv lub kiln thaum lub sij hawm calcination, txiv qaub feem ntau muaj underfired txiv qaub thiab overfired txiv qaub. Calcium carbonate nyob rau hauv lub underfire txiv qaub yog tsis tag decomposed, thiab nws tsis muaj cohesive quab yuam thaum siv, uas tsis muaj peev xwm muab txaus cohesive zog rau lub putty, uas ua rau cov hmoov tshem tawm los ntawm tsis txaus hardness thiab lub zog ntawm putty.
2. Cov ntsiab lus ntawm calcium hydroxide ntau dua hauv cov hmoov tshauv calcium hmoov, qhov zoo dua qhov hardness ntawm putty tsim. Ntawm qhov tsis sib xws, qhov qis ntawm cov ntsiab lus ntawm calcium hydroxide hauv cov hmoov tshauv calcium hmoov, qhov hnyav ntawm cov putty ntawm qhov chaw tsim khoom, ua rau muaj teeb meem ntawm cov hmoov tshem tawm thiab cov hmoov tshem tawm.
3. Cov hmoov tshauv calcium hmoov yog tov nrog ib tug loj npaum li cas ntawm hnyav calcium hmoov, uas ua rau cov ntsiab lus ntawm cov hmoov tshauv calcium hmoov yog tsawg dhau los muab txaus hardness thiab lub zog rau lub putty, ua rau lub putty poob hmoov. Lub luag haujlwm tseem ceeb ntawm cov hmoov putty yog khaws cov dej, muab dej txaus rau qhov tawv ntawm cov hmoov tshauv calcium, thiab xyuas kom muaj cov nyhuv hardening txaus. Yog hais tias muaj teeb meem nrog qhov zoo ntawm hydroxypropyl methylcellulose los yog cov ntsiab lus zoo yog tsawg, tsis muaj dej noo txaus, uas yuav ua rau lub hardening tsis txaus thiab ua rau lub putty poob hmoov.
Nws tuaj yeem pom los ntawm cov saum toj no tias qhov zoo ntawm hydroxypropyl methylcellulose yog qhov tsis zoo thiab tsis tuaj yeem ua tiav ib qho txiaj ntsig, thiab cov hmoov putty yuav poob. Qhov laj thawj tseem ceeb yog grey thov khawv hnyav calcium.
Post lub sij hawm: Sep-22-2022