HPMC (Hydroxypropyl methylcellulose) yog ib qho tseem ceeb additive feem ntau siv nyob rau hauv lub tsev cov ntaub ntawv xws li putty hmoov, coatings, adhesives, thiab lwm yam. Nws muaj ntau yam functions xws li thickening, dej tuav, thiab txhim kho kev tsim kho. Hauv kev tsim cov hmoov putty, qhov sib ntxiv ntawm HPMC tuaj yeem tsis tsuas yog txhim kho cov dej tuav ntawm cov khoom, tab sis kuj tseem siv sijhawm ntev ntawm kev tsim kho, tiv thaiv cov putty kom qhuav sai sai thaum tsim kho, thiab cuam tshuam rau kev tsim kho.
1. Xaiv tus qauv HPMC txoj cai
Kev ua haujlwm ntawm HPMC yog ze ze rau nws qhov hnyav molecular, hydroxypropyl hloov pauv, methyl hloov pauv thiab lwm yam. Txhawm rau txhim kho cov dej khaws cia ntawm cov hmoov putty, ua ntej xaiv HPMC qauv tsim nyog.
High viscosity HPMC: HPMC nrog qhov hnyav dua molecular tuaj yeem tsim cov qauv sib txuas kom muaj zog, uas pab txhim kho cov dej tuav ntawm cov hmoov putty thiab tiv thaiv cov dej tsis txaus. Feem ntau, HPMC nrog viscosity siab dua yuav muaj txiaj ntsig zoo rau kev tuav dej.
Kev hloov pauv uas tsim nyog: Kev hloov pauv hydroxypropyl thiab methyl hloov pauv ntawm HPMC cuam tshuam rau nws cov dej solubility thiab khaws cia muaj peev xwm. Qib siab dua ntawm hydroxypropyl hloov pauv pab txhim kho hydrophilicity ntawm HPMC, yog li txhim kho nws cov dej tuav dej.
Raws li cov kev xav tau ntawm cov hmoov putty, xaiv tus qauv HPMC txoj cai tuaj yeem txhim kho cov dej tuav tus nqi ntawm cov khoom.
2. Ua kom tus nqi ntawm HPMC ntxiv
Txhawm rau txhawm rau txhim kho cov dej khaws cia ntawm cov hmoov putty, tus nqi ntawm HPMC ntxiv tuaj yeem tsim nyog ntxiv. Los ntawm kev nce kev faib ua feem ntawm HPMC, nws qhov kev faib tawm hauv putty tuaj yeem txhim kho tau zoo thiab nws lub peev xwm khaws dej tuaj yeem txhim kho.
Qhov nce ntxiv ntawm qhov sib ntxiv yuav ua rau muaj kev nce ntxiv hauv cov viscosity ntawm putty hmoov. Yog li ntawd, nws yog ib qho tsim nyog los xyuas kom meej cov dej tuav tau zoo thaum tsis txhob muaj viscosity ntau dhau los cuam tshuam rau kev tsim kho.
3. Tsim qauv qauv tsim qauv
Cov qauv tsim ntawm putty hmoov ncaj qha cuam tshuam nws cov dej tuav. Ntxiv rau HPMC, kev xaiv ntawm lwm cov khoom hauv cov mis (xws li cov khoom ntim, cov nplaum, thiab lwm yam) yuav cuam tshuam rau cov dej tuav ntawm cov hmoov putty.
Fineness thiab tshwj xeeb deg cheeb tsam: qhov particle loj thiab tej qhov chaw nto ntawmuaqhov muab tub lim hauv cov hmoov putty yuav cuam tshuam rau adsorption ntawm dej. Cov hmoov zoo thiab cov khoom ua kom zoo nrog thaj chaw siab tshwj xeeb tuaj yeem nqus dej zoo dua thiab txo cov dej poob. Yog li ntawd, kev xaiv tsim nyog ntawm cov khoom ntim khoom loj yog qhov tseem ceeb hauv kev txhim kho dej tuav.
Kev xaiv cov khoom xyaw cement: Yog tias cov hmoov putty muaj cov cement thiab lwm cov khoom xyaw, cov tshuaj tiv thaiv ntawm cov cement yuav haus dej. Yog li ntawd, nws yog ib qho tsim nyog los txhim kho cov dej tuav ntawm putty los ntawm kev kho qhov piv ntawm cov cement rau muab tub lim.
4. Tswj cov txheej txheem sib tov
Cov txheej txheem sib xyaw kuj muaj qee yam cuam tshuam rau cov dej khaws cia ntawm cov hmoov putty. Kev sib xyaw tsim nyog tuaj yeem pab HPMC tawg tag nrho thiab sib xyaw nrog lwm cov khoom xyaw kom tsis txhob muaj qhov sib txawv ntawm cov dej tuav los ntawm kev sib xyaw tsis sib xws.
Kev sib xyaw kom haum lub sijhawm thiab ceev: Yog tias lub sijhawm sib xyaw luv dhau, HPMC yuav tsis yaj tag nrho, uas yuav cuam tshuam rau nws cov dej tuav. Yog tias qhov sib tov nrawm dhau, huab cua ntau dhau yuav raug qhia, cuam tshuam rau qhov zoo ntawm putty hmoov. Yog li ntawd, kev tswj kom tsim nyog ntawm cov txheej txheem sib tov yuav pab txhim kho tag nrho cov dej tuav ntawm putty hmoov.
5. Tswj ib puag ncig cov av noo thiab kub
Kev tuav dej ntawm cov hmoov putty tsis yog tsuas yog cuam tshuam nrog cov khoom siv raw thiab cov qauv, tab sis kuj tseem cuam tshuam nrog cov av noo thiab kub ntawm qhov chaw tsim kho. Nyob rau hauv ib qho chaw uas muaj qhov kub thiab txias tsis tshua muaj av noo, noo noo ntawm putty hmoov yog ib qho yooj yim rau evaporate, ua rau nws qhuav sai heev thiab cuam tshuam rau kev tsim kho nyhuv.
Thaum lub sij hawm tsim kho, qhov tsim nyog kub thiab av noo yuav tsum tau khaws cia kom ntau li ntau tau los tiv thaiv cov hmoov putty los ntawm kev poob dej sai heev. Kev tswj kom zoo ntawm ambient kub thiab av noo tuaj yeem txhim kho cov dej tuav ntawm putty hmoov.
6. Ntxiv cov dej khaws cia
Ntxiv rau HPMC, lwm cov dej tuav cov dej kuj tseem tuaj yeem suav tias yog ntxiv rau cov hmoov putty, xws li qee cov polymers, polyvinyl cawv, thiab lwm yam. Cov dej tuav cov dej no tuaj yeem txhim kho cov dej tuav ntawm putty, ncua sij hawm tsim kho, thiab tiv thaiv cov putty kom qhuav thiab tawg sai heev.
Txawm li cas los xij, thaum ntxiv cov dej khaws cia, nws yuav tsum tau ua tib zoo saib xyuas lawv cov kev sib raug zoo nrog HPMC kom ntseeg tau tias tsis muaj kev cuam tshuam tsis zoo tshwm sim lossis cuam tshuam rau kev tsim kho ntawm putty.
7. Siv cov cuab yeej tswj cov av noo
Hauv qee lub sijhawm tshwj xeeb, cov cuab yeej tswj hwm av tuaj yeem siv los txhim kho cov dej tuav ntawm cov hmoov putty. Piv txwv li, kev siv cov dej-raws li sealing daim nyias nyias los yog cov khoom siv humidification tuaj yeem txo cov dej poob ntawm putty thaum lub sij hawm tsim kho, tswj cov ntub dej ntawm cov txheej putty, yog li ncua nws lub sij hawm tsim kho thiab txhim kho dej tuav.
Cov dej khaws cia ntawm cov hmoov putty tuaj yeem txhim kho tau zoo los ntawm kev xaiv hom zooHPMC, nce qhov sib ntxiv, optimizing cov mis, txhim kho cov txheej txheem sib xyaw, tswj cov av noo thiab kub ntawm qhov chaw tsim kho, thiab lwm yam kev ntsuas. Raws li ib qho tseem ceeb ntawm cov hmoov putty, kev txhim kho cov dej tuav ntawm HPMC tuaj yeem tsis tsuas yog txhim kho kev tsim kho, tab sis kuj txhim kho qhov kev tsim kho zaum kawg thiab txo qhov tsis xws luag thiab teeb meem hauv kev tsim kho. Yog li ntawd, kev nkag siab thiab kev paub txog cov txheej txheem no los txhim kho tus nqi khaws cia dej yog qhov tseem ceeb rau cov lag luam uas tsim thiab siv cov hmoov putty.
Post lub sij hawm: Mar-20-2025