(1) Txheej txheem cej luam ntawm HPMC
Hydroxypropyl Methyl Cellulose (HPMC) yog ib qho uas tsis yog-ionic cellulose ether feem ntau siv hauv cov khoom siv hauv tsev. HPMC muaj cov dej solubility zoo heev, dej tuav, cov khoom ua yeeb yaj kiab thiab kev ruaj ntseg, thiab yog siv dav hauv cov khoom siv hauv tsev xws li cov nplais nplaum, cov hmoov nplej, gypsum board thiab mortar qhuav. Hauv cov cement-raws li cov nplaum nplaum, HPMC plays lub luag haujlwm tseem ceeb, thiab nws lub luag haujlwm tseem ceeb yog cuam tshuam los ntawm kev txhim kho kev tsim kho, ua kom muaj zog sib txuas, txuas lub sijhawm qhib, thiab ua kom cov khoom tiv thaiv plam.
(2) Lub luag hauj lwm ntawm HPMC hauv cov cement-raws li cov nplaum nplaum
1. Txhim kho kev tsim kho kev ua haujlwm
HPMC tuaj yeem txhim kho kev tsim kho kev ua tau zoo ntawm cov cement-raws li cov nplaum nplaum, uas tau pom tshwj xeeb hauv cov hauv qab no:
Nce rheology: HPMC nce viscosity ntawm cov nplaum los ntawm nws cov nyhuv thickening, ua kom yooj yim rau kev sib kis thiab kho, yog li txhim kho kev tsim kho yooj yim. Tsim nyog rheology xyuas kom meej tias cov nplaum tuaj yeem tsim cov txheej txheem sib txuas ntawm cov phab ntsa lossis hauv pem teb, uas yog qhov tseem ceeb tshwj xeeb rau kev tso cov vuas loj.
Txhim kho dej tuav: HPMC muaj peev xwm tuav tau dej zoo heev thiab tuaj yeem kaw cov dej hauv cov nplaum kom tiv thaiv cov dej los ntawm evaporating sai heev. Qhov no tsis tsuas yog pab cov cement kom hydrate tag nrho, tab sis kuj ua rau lub sijhawm qhib ntawm cov nplaum, tso cai rau cov neeg ua haujlwm tsim kho lub sijhawm ntxiv thiab kho qhov chaw ntawm cov vuas.
Txhim kho kev tiv thaiv plam: Thaum tso cov vuas, tshwj xeeb tshaj yog cov vuas loj ntawm cov phab ntsa ntsug, qhov teeb meem ntawm cov pobzeb slippage feem ntau teeb meem cov neeg ua haujlwm. HPMC ua kom cov viscosity ntawm cov nplaum, tso cai rau cov vuas kom sai sai tau txais qee qhov kev sib txuas ua ke tom qab kev teeb tsa, yog li tiv thaiv kev slippage.
2. Txhim kho daim ntawv cog lus
HPMC tuaj yeem txhim kho lub zog ntawm cov cement-raws li cov nplaum nplaum vim nws tuaj yeem ua lub luag haujlwm hauv cov hauv qab no:
Txhawb cov cement hydration: Cov dej tuav cov cuab yeej ntawm HPMC tuaj yeem tswj cov dej noo hauv cov nplaum thiab txhawb kom muaj dej tiav ntawm cov cement. Cov cement pob zeb qauv tsim los ntawm tag nrho cov hydration ntawm cov cement yog ntom, yog li txhim kho lub zog ntawm cov nplaum.
Txhim kho qhov cuam tshuam cuam tshuam: HPMC tuaj yeem tsim cov yeeb yaj kiab nyias nyias ntawm cov nplaum thiab cov pobzeb. Cov yeeb yaj kiab no muaj qhov zoo adhesion thiab yoog raws, uas tuaj yeem txhim kho lub zog sib cuam tshuam ntawm cov nplaum thiab cov nplais pobzeb saum npoo thiab txhim kho tag nrho cov kev sib raug zoo.
3. ncua sij hawm qhib
Lub sijhawm qhib yog hais txog lub sijhawm los ntawm daim ntawv thov ntawm cov nplaum rau kev tso cov pobzeb. Kev tuav dej thiab kev tswj xyuas rheological ntawm HPMC tuaj yeem txuas ntxiv lub sijhawm qhib ntawm cov cement-raws li cov nplaum nplaum, uas feem ntau tshwm sim hauv cov hauv qab no:
Kev ncua dej evaporation: Cov yeeb yaj kiab polymer tsim los ntawm HPMC tuaj yeem txo cov evaporation ntawm cov dej los ntawm cov nplaum, kom cov nplaum tuaj yeem tswj tau lub sijhawm ntev.
Ua kom ntub dej: Vim lub hygroscopicity ntawm HPMC, cov nplaum tuaj yeem nyob twj ywm rau lub sijhawm ntev, yog li txuas lub qhov rais ua haujlwm thiab ua rau kev hloov kho thiab tso sijhawm ntawm cov neeg ua haujlwm tsim kho.
4. Ua kom muaj zog tiv thaiv kev ua haujlwm
Anti-slip kev ua tau zoo yog hais txog qhov tsis kam ntawm cov vuas rau kev hloov pauv vim lawv qhov hnyav lossis sab nraud quab yuam thaum lawv nyuam qhuav tso. Lub thickening thiab gelling cuam tshuam ntawm HPMC tuaj yeem txhim kho cov khoom tiv thaiv plam ntawm cov cement-raws li cov nplaum nplaum hauv cov hauv qab no:
Txhim kho thawj qhov adhesion: HPMC txhim kho qhov pib adhesion ntawm cov nplaum, tso cai rau cov vuas kom sai sai tau qhov chaw ruaj khov tom qab tso thiab txo qhov hloov chaw.
Tsim cov qauv elastic: Cov qauv sib txuas tsim los ntawm HPMC hauv cov nplaum tuaj yeem muab qee qhov elastic rov qab quab yuam, uas ua lub luag haujlwm tseem ceeb hauv kev tiv thaiv cov pobzeb slippage.
(3) Tus nqi ntawm HPMC siv rau hauv cov cement-raws li cov nplaum nplaum
Tus nqi ntawm HPMC ntxiv feem ntau yog txiav txim siab raws li kev thov sib txawv, feem ntau ntawm 0.1% thiab 0.5%. Hauv kev siv tiag tiag, nws yog qhov yuav tsum tau kho tus nqi raws li cov qauv tshwj xeeb ntawm cov nplaum, kev tsim kho, thiab cov nplais tshwj xeeb kom ua tiav cov txiaj ntsig zoo tshaj plaws. Ntxiv HPMC tsawg dhau yuav ua rau muaj kev sib raug zoo tsis zoo, thaum ntxiv ntau dhau tuaj yeem ua rau tus nqi nce ntxiv thiab cuam tshuam rau kev tsim kho.
(4) Kev xaiv thiab kev sib raug zoo ntawm HPMC
Xaiv qhov tsim nyog HPMC specification hauv cov cement-raws li cov nplaum nplaum yog qhov tseem ceeb rau cov khoom lag luam. Cov kev ntsuas xws li HPMC viscosity, hloov pauv qib thiab qhov loj me yuav cuam tshuam rau nws cov txiaj ntsig kawg. Feem ntau, qhov siab dua qhov viscosity ntawm HPMC, qhov zoo dua nws cov dej tuav thiab thickening nyhuv, tab sis lub sij hawm dissolution kuj yuav nce kuj. Yog li ntawd, nws yog ib qho tsim nyog los xaiv cov specifications tsim nyog raws li qhov xav tau tiag tiag.
HPMC yuav tsum muaj kev sib raug zoo nrog lwm cov tshuaj ntxiv kom ua tiav qhov kev ua tau zoo. Piv txwv li, kev sib xyaw ua ke nrog cov khoom siv ntxiv xws li ethylene glycol, propylene glycol thiab lwm yam cellulose ethers tuaj yeem txhim kho kev tsim kho kom zoo thiab ua haujlwm ntev ntawm cov nplaum.
(5) Txoj kev loj hlob ntawm HPMC hauv cov cement-raws li cov nplaum nplaum
Nrog rau kev nce qib ntawm cov khoom siv thev naus laus zis txuas ntxiv mus, cov kev xav tau rau kev ua haujlwm ntawm cov cement-raws li cov nplaum nplaum kuj tau txais ntau dua thiab siab dua. Raws li ib qho ntawm cov khoom siv tseem ceeb, txoj kev loj hlob ntawm HPMC feem ntau yog tshwm sim hauv cov hauv qab no:
Kev tshawb fawb thiab kev loj hlob ntawm ib puag ncig tus phooj ywg HPMC: Nrog rau kev txhim kho ntawm ib puag ncig kev paub, kev tshawb fawb thiab kev loj hlob ntawm cov tsis muaj volatile organic compounds (VOC) thiab degradable environmentally friendly HPMC tau dhau los ua ib qho qauv.
Kev txhim kho ntawm kev ua haujlwm HPMC: Txhawm rau ua kom tau raws li kev tsim kho sib txawv, HPMC cov khoom siv nrog cov haujlwm tshwj xeeb (xws li tiv thaiv kab mob, tshuaj tua kab mob, xim tuav, thiab lwm yam) yog tsim los txhim kho kev ua tau zoo ntawm cov nplais nplaum.
Daim ntawv thov ntawm HPMC ntse: Intelligent HPMC tuaj yeem hloov kho nws qhov kev ua tau zoo raws li ib puag ncig (xws li qhov kub thiab txias, av noo, thiab lwm yam), kom cov cement-raws li cov nplaum nplaum tuaj yeem tswj tau qhov kev ua tau zoo nyob rau hauv ntau yam kev tsim kho.
Daim ntawv thov ntawm HPMC nyob rau hauv cov cement-raws li cov nplaum nplaum zoo heev txhim kho kev ua haujlwm ntawm cov nplaum, nrog rau kev txhim kho kev tsim kho, ua kom muaj zog sib txuas, ncua sij hawm qhib thiab ua kom cov khoom tiv thaiv plam. Nws cov dej tuav, thickening thiab zoo cuam tshuam cuam tshuam ua rau cov cement-raws li cov nplaum nplaum kom ua tiav cov txiaj ntsig zoo hauv kev tsim kho tiag tiag. Nrog rau kev nce qib ntawm cov thev naus laus zis tsis tu ncua, thaj chaw thov thiab kev ua haujlwm ntawm HPMC tseem txuas ntxiv txuas ntxiv, muab kev cia siab dav rau kev tsim cov cement-raws li cov nplaum nplaum.
Post lub sij hawm: Jun-28-2024