Hydroxypropyl Methylcellulose (HPMC)yog ib qho cellulose ether uas tsis yog ionic uas siv dav hauv cov ntaub ntawv siv hauv kev tsim kho, tshwj xeeb tshaj yog hauv cov khoom sib koom ua ke (Joint Filler lossis Tile Grout). Raws li ib qho ntawm cov khoom ntxiv tseem ceeb, HPMC ua lub luag haujlwm tseem ceeb. Nws cov txiaj ntsig tseem ceeb suav nrog kev khaws cia dej zoo heev, ua kom tuab, ua kom lubricity thiab kev ua haujlwm zoo dua ntawm kev tsim kho.
1. Kev Txheeb Xyuas Yooj Yim ntawm Cov Khoom Siv Sib Koom Tes
Cov tshuaj nplaum sib koom ua ke feem ntau yog siv los txhaws qhov sib txawv ntawm cov vuas thiab pob zeb. Lawv tsis yog tsuas yog ua lub luag haujlwm zoo nkauj xwb, tab sis kuj muaj cov dej tsis nkag, tiv taus pwm thiab tsis tawg. Cov tshuaj nplaum sib koom ua ke feem ntau suav nrog cov cement, epoxy resin thiab polymer hloov kho. Cov tshuaj nplaum sib koom ua ke cement yog siv dav vim lawv pheej yig thiab siv tau dav.
Txawm li cas los xij, cov khoom siv sib koom ua ke uas siv cov cement ib txwm muaj teeb meem xws li yooj yim tawg, tsis txaus lo thiab tsis zoo rau kev tsim kho. Txhawm rau txhim kho cov teeb meem no, cov tshuaj ntxiv cellulose ether xws li HPMC feem ntau raug ntxiv rau hauv cov mis.
2. Lub luag haujlwm ntawm HPMC hauv cov khoom sib koom ua ke
2.1. Kev khaws dej kom zoo dua
HPMC muaj cov khoom khaws dej tau zoo heev, uas tuaj yeem kaw cov dej noo, tiv thaiv cov cement kom tsis txhob poob dej sai, thiab txhim kho qib dej ntawm cov cement, yog li ua kom lub zog sib txuas thiab tiv thaiv kev tawg ntawm cov pob qij txha. Qhov no tseem ceeb heev rau kev tsim kho txheej nyias thiab qhov chaw qhuav.
2.2. Kev ua tau zoo dua ntawm kev tsim kho
Thaum lub sijhawm tsim kho, HPMC tuaj yeem txhim kho qhov lubricity thiab fluidity ntawm cov khoom, ua rau nws yooj yim dua rau kev nthuav dav thiab sau cov slurry, txo qhov nyuaj ntawm kev tsim kho. Tib lub sijhawm, nws kuj tseem tuaj yeem tiv thaiv cov slurry kom qhuav ua ntej lub sijhawm, ua rau lub sijhawm ua haujlwm thiab lub sijhawm hloov kho ntev dua.
2.3. Kev tswj cov tuab thiab thixotropy
HPMC tsim cov tshuaj colloidal sib xws, muab cov slurry zoo sib xws thiab thixotropy, ua rau cov khoom sib koom ua ke yooj yim rau kev ua haujlwm thiab tswj kev ua haujlwm dai ntsug zoo, zam cov teeb meem xws li sagging thiab swb thaum lub sijhawm tsim kho.
2.4. Kev nplaum zoo dua
Ib qho HPMC kom txaus tuaj yeem txhim kho qhov kev sib txuas ntawm cov slurry thiab ntug ntawm cov pobzeb thiab cov substrate, yog li txhim kho qhov ruaj khov ntawm tag nrho cov qauv thiab txo qhov tawg thiab poob tom qab.
2.5. Tiv thaiv kev tawg thiab tiv thaiv kev ntsws
HPMC tuaj yeem txo qhov nrawm ntawm kev ntsws los ntawm kev khaws dej thiab txhim kho qhov ceev ntawm cov qauv, thiab txo qhov kev pheej hmoo ntawm kev tawg los ntawm kev poob dej thiab ntsws tom qab caulking. Nws yog qhov tshwj xeeb tshaj yog rau kev siv hauv thaj chaw uas muaj kev hloov pauv ntau zaus ntawm qhov kub thiab av noo.
2.6. Txhim kho kev tiv thaiv te thiab kev ruaj khov
Hauv qhov chaw kub qis, HPMC tuaj yeem pab tus neeg sawv cev caulking tswj hwm qee qhov kev ywj pheej thiab tiv thaiv kev puas tsuaj khov; nws cov qauv molecular ruaj khov kuj tseem tuaj yeem txhim kho kev ruaj khov mus sij hawm ntev ntawm tus neeg sawv cev caulking.
3. Cov lus qhia siv
3.1. Tus nqi ntxiv uas pom zoo
Tus nqi pom zoo ntawm HPMC hauv cov khoom sib koom ua ke feem ntau yog 0.2% ~ 0.5%, uas tuaj yeem hloov kho kom haum raws li cov mis khoom. Kev ntxiv ntau dhau yuav ua rau kom qhuav sai thiab lub zog txo qis, yog li cov mis yuav tsum tau ua kom zoo dua ua ke nrog kev sim.
3.2. Txoj kev tawg thiab yaj
HPMC yuav tsum tau muab faib ua ntej rau hauv cov khoom qhuav thaum siv nws kom tsis txhob muaj kev sib sau ua ke los ntawm kev ntxiv ncaj qha rau hauv dej; nws raug pom zoo kom ntxiv rau hauv dej hauv qab kev sib xyaw ceev ceev kom txhawb kev yaj sib xws.
3.3. Kev sib koom tes nrog lwm cov khoom ntxiv
HPMC siv tau ua ke nrog cov hmoov txhuv nplej siab ether, cov hmoov latex uas tawg tau dua tshiab, cov tshuaj txo dej, thiab lwm yam kom ua tiav kev ua tau zoo dua. Tshwj xeeb, thaum siv ua ke nrog RDP (hmoov latex), nws tuaj yeem txhim kho qhov yooj ywm thiab lub zog sib txuas.
4. Cov lus qhia xaiv HPMC
HPMC muaj ntau hom, thiab nws cov kev ua tau zoo cuam tshuam los ntawm qib kev hloov pauv (DS), viscosity, qhov loj me ntawm cov khoom me me thiab kev sib kis. Hauv cov khoom sib koom ua ke, nws raug pom zoo kom xaiv cov hom HPMC hauv qab no:
Qhov nruab nrab thiab qis viscosity (40,000 ~ 100,000 mPa · s): xav txog ob qho tib si kev tsim kho thiab kev khaws dej, tsim nyog rau feem ntau cov qauv.
Hom tam sim ntawd (hom kev kho saum npoo): tsim nyog rau kev sib kis sai thiab txo lub sijhawm yaj.
Cov khoom hloov pauv siab: khaws dej tau zoo dua, tsim nyog rau kev tsim kho hauv qhov kub siab lossis thaj chaw qhuav.
Raws li ib qho khoom siv ntxiv uas tseem ceeb hauvCov khoom sib koom ua ke HPMCTsis yog tsuas yog txhim kho qhov kev ua tau zoo ntawm kev tsim kho thiab lub neej ua haujlwm ntawm cov khoom siv xwb, tab sis kuj tseem txhim kho qhov zoo tag nrho thiab kev paub ntawm cov neeg siv khoom. Nrog rau kev tsim cov ntaub ntawv tsim kho ntsuab thiab ib puag ncig zoo, HPMC yuav ua lub luag haujlwm tseem ceeb hauv kev sib koom ua ke thiab lwm yam tshuaj siv hauv kev tsim kho vim nws cov txiaj ntsig xws li bio-based, tsis muaj tshuaj lom thiab lwj.
Lub sijhawm tshaj tawm: Lub Rau Hli-05-2025