Kev siv tus kheej-txheej txheem cug yog lub tsev zoo siv hauv av tsim. Nws muaj zoo fluidity, muaj zog adhesion thiab qis shrinkage. Nws cov khoom xyaw tseem ceeb muaj xws li cov xis mas, zoo sib sau ua ke, hloov kho thiab dej. Raws li kev tsim kho cov kev tsim kho kom muaj kev txhim kho thiab kev ua tau zoo ib txwm muaj xws li nws lub fluidity, adhesion, thiab tawg tsis kam.
HPMC yog cov khoom siv polymer raws ntawm cellulose thiab ua los ntawm kev hloov kho tshuaj. Nws muaj cov dej ua kom zoo, thickening thiab dej khaws cov khoom siv. Nws siv nyob rau hauv tus kheej-leveling cug yuav ua tau zoo txhim kho kev tsim kho kev tsim kho, tawg tawm, dej rov qab ua tau zoo, thiab lwm yam ntawm lub tshuaj khib.
1. Cov khoom yooj yim ntawm HPMC
HPMC yog dej-soluble polymer sib xyaw npaj tau los ntawm kev qhia methyl thiab hydroxypropylropyl rau Molulose molecules. Nws muaj cov nta hauv qab no:
Thickening: Kimacell® Tau nce ntxiv kom ua kom lub viscosity ntawm kev daws teeb meem, yog li kho cov kua tshuaj cug kev sib xyaw.
Dej khaws cia: HPMC muaj peev xwm khaws cov dej phib noo hauv lub tshuaj khib, tsis txhob muaj kev phom sij evaporate, thiab ua kom cov tshuaj lom tag nrho ntawm cov cement.
Kev Ua Haujlwm: Qhov kev sib txuas ntawm HPMC tuaj yeem txhim kho kev tsim kho ntawm lub tshuaj khib, ua rau lub tshuaj khib nyiab uas mob siab rau hauv av thiab tsis txhob muaj npuas thiab tawg.
Adhesion: nws kuj tseem tuaj yeem txhim kho cov nplaum ntawm lub cug thiab txhim kho cov nplaum ntawm cov nplaum ntawm tus kheej cug cug.
2. Cov kev cuam tshuam tshwj xeeb ntawm HPMC ntawm kev ua yeeb yam ntawm kev sib nphu tus kheej
Kua thiab tsim khoom
HPMC, raws li cov tuab dua, muaj kev ua haujlwm ntawm kev txhim kho fightriency nyob rau hauv tus kheej txoj kev sib khib. Cov cuab yeej muaj txiaj ntsig yog ib qho khoom tseem ceeb hauv kev tsim kho tus kheej cug vuag, uas cuam tshuam rau txoj kev tsim kho thiab nrawm ntawm kev tsim kho. Cov kev tshawb fawb tau pom tias HPMC tsim nyog txhim kho kom muaj kev tshuaj khib nyiab, thaum tsis txhob muaj kev phom sij ntawm lub cug. Los ntawm kev tswj hwm tus nqi HPMC, lub fluidity ntawm lub tshuaj khib yuav ua kom haum rau nws tsis yooj yim dua, Li no txhim kho kev tsim kho kev tsim kho kev tsim kho tau zoo.
Dej ceev
Cov dej khaws cia ntawm HPMC yog lwm qhov tseem ceeb hauv nws daim ntawv thov hauv kev sib nphu tus kheej. Lub noo noo nyob rau hauv tus kheej txoj kev npaws cug yuav ploj los ntawm evaporation thaum lub kev tsim kho cov txheej txheem. Yog tias cov dej noo ploj sai dhau lawm, nws yuav ua rau stratification thiab tawg ntawm cug tshuaj khib, thiab txawm cuam tshuam rau cov txheej txheem hydration ntawm cov cement. HPMC muaj peev xwm ncua kev ncua kev dej ntws los ntawm kev ua cov dej haus, kom muaj kev cuam tshuam tias cov tshuaj tsw qab ntawm cov cement tuaj yeem ua tiav. Qhov no tuaj yeem tiv thaiv cov kab cug saum npoo los ntawm ziab tawm sai dhau thiab txo cov kab nrib pleb thiab qhov tsis xws luag thaum lub sijhawm tsim kho.
Tawg
Kev ua rau tus kheej txoj kab cug feem ntau yog cov teeb meem tawg los ntawm shrinkage lossis ntsuas kub hloov. Qhov sib ntxiv ntawm Kimacell® tuaj yeem txhim kho cov dej cug, ncua dej evaporation, thiab txo cov shrinkage ntawm cug, yog li kev txhim kho cov tawg ua kom tsis kam. Cov qauv molecular ntawm HPMC tuaj yeem tsim cov txheej txheem sib txawv hauv cov xis mas tsis sib thooj ntawm cov txheej txheem kom qhuav ntawm cov kab nrib pleb.
Kua nplaum
Lub visccosity siab ntawm HPMC yuav pab txhim kho cov nplaum ntawm lub tshuaj khib, tshwj xeeb tshaj yog cov kev sib txuas nrog cov txheej txheem hauv qab thaum txheej txheem kev ua haujlwm. Ib qho ntawm cov haujlwm tseem ceeb ntawm kev sib nphuam tus kheej yog rau theem hauv av thiab muab cov nplaum muaj zog. HPMC tuaj yeem txhim kho cov nplaum ntawm lub cug sab cug, tiv thaiv cov tev ua tiav ntawm cov txheej txheem kev ua kom zoo nkauj thiab txheej txheem txhim kho, yog li kev tsim kho tag nrho. Cov.
Anti-foaming thiab leveling yam ntxwv
Kev tswj hwm kev vam meej thiab ua npuas ncauj tswj ntawm tus kheej txoj kev npaub yuav tsum tau ua kom zoo siab thaum lub sijhawm tsim kho. Cov qauv molecular ntawm HPMC tuaj yeem pab txo cov pa tshuaj tua kom ua rau hauv lub npuas, thiab paub meej txog cov tshuaj khib nyiab thiab ntom ntawm lub cug sib xyaw. Los ntawm kev txhim kho cov theem leveling ntawm tus kheej cug, hpmc tuaj yeem ua kom cov theem tsim kho ntawm tus kheej txoj kev tsim kho thiab txhim kho qhov zoo ntawm cov khoom tiav.
3. Kev ua kom zoo ntawm HPMC ntau npaum
Txawm hais tias HPMC muaj ntau yam zoo ntawm kev ua yeeb yam ntawm kev coj ua tus kheej, kev xaiv ntawm nws cov koob tshuaj yog qhov tseem ceeb heev. Ntau dhau HPMC yuav ua cug kab tshuaj khib nyiab dhau thiab ua rau muaj kua; Thaum lub sij hawm me me HPMC yuav tsis muaj peev xwm ua kom nws cov teebmeem ua kom tiav. Yog li ntawd, tus nqi uas tsim nyog ntawm HPMC ntxiv yuav tsum tau hloov kho raws li cov qauv sib txawv thiab kev tsim kho cov kev tsim kho. Feem ntau hais lus, tus nqi ntawm HPMC uas tsim nyog yog nruab nrab ntawm 0.1% thiab 0.5%, thiab cov lej tshwj xeeb xav tau raws li cov kev ua tau zoo ntawm lub tshuaj khib.
Raws li qhov tseem ceeb hloov kho,HydroxyPropyyl Methylcellulose(HPMC) Muaj kev txhim kho cov nyhuv muaj txiaj ntsig zoo thaum siv hauv kev sib nphoo ntawm tus kheej. Nws tuaj yeem txhim kho cov kua txiv, dej ceev, tawg tsis kam thiab adhesion ntawm cug. Tus nqi tsim nyog ntawm Kimacell® tau txhim kho kev ua haujlwm thiab lub neej kev pabcuam ntawm tus kheej txoj kev tsim kho tus kheej rau kev tsim kho niaj hnub rau kev tsim kho zoo thiab ua tau zoo. Yog li ntawd, nyob rau hauv lub freatulation kev tsim qauv ntawm tus kheej-leveling cug, kev siv hluav taws xob ntawm HPMC yog qhov tseem ceeb tshaj plaws. Txawm li cas los xij, cov nqi ntawm HPMC thiab kev hloov kho ntawm cov qauv uas yuav tsum tau ua kom zoo raws li cov kev tsim kho tshwj xeeb thiab kev ua tau zoo kom ua tiav qhov kev tsim kho zoo tshaj plaws.
Lub Sijhawm Post: Jan-18-2025