Hydroxypropyl methylcellulose (HPMC) yog ib qho cellulose uas tau hloov kho los ntawm tshuaj lom neeg uas siv dav hauv kev lag luam kev tsim kho rau nws cov khoom zoo heev.
1. Kev piav qhia txog kev ua tau zoo yooj yim
HPMC yog cov cellulose ether uas tsis muaj tshuaj lom, tsis muaj ntxhiab, tsis muaj ionic nrog kev yaj dej zoo thiab nplaum tau zoo. Nws cov yam ntxwv tseem ceeb suav nrog:
Thickening: Nws tuaj yeem ua rau kom cov viscosity ntawm cov tshuaj ntau ntxiv thiab txhim kho cov khoom rheological ntawm cov ntaub ntawv tsim kho.
Kev khaws dej: Nws muaj peev xwm khaws dej zoo heev thiab tuaj yeem txo qhov poob dej.
Kev nplaum: Txhim kho qhov kev nplaum ntawm cov ntaub ntawv tsim kho thiab cov khoom siv.
Lubricity: Txhim kho qhov du thiab yooj yim ntawm kev ua haujlwm thaum lub sijhawm tsim kho.
Kev tiv thaiv huab cua: kev ua haujlwm ruaj khov nyob rau hauv qhov kub siab lossis qis.
2. Cov ntawv thov tshwj xeeb hauv kev lag luam kev tsim kho
2.1. Cov tshuaj cement
Hauv cov cement mortar, HPMC feem ntau yog siv los ua tus neeg sawv cev khaws dej thiab ua kom tuab. Nws tuaj yeem tiv thaiv cov mortar kom tsis txhob tawg thiab poob zog vim yog dej evaporation sai, thiab tib lub sijhawm txhim kho kev ua haujlwm ntawm kev tsim kho thiab muaj peev xwm tiv thaiv kev sagging. Cov mortar uas muaj zog khaws dej tau zoo yog qhov tsim nyog rau kev tsim kho hauv qhov kub thiab txias thiab qhov chaw noo noo tsawg.
2.2. Cov nplaum rau pobzeb
Cov nplaum rau pobzeb xav tau lub zog sib txuas siab thiab yooj yim rau kev tsim kho, thiab HPMC ua lub luag haujlwm tseem ceeb hauv qhov no. Ntawm ib sab tes, nws txhim kho qhov cuam tshuam ntawm kev sib txuas los ntawm kev ua kom tuab thiab khaws dej; ntawm qhov tod tes, nws ncua lub sijhawm qhib kom pab cov neeg ua haujlwm kho qhov chaw ntawm cov pobzeb ceramic rau lub sijhawm ntev dua.
2.3. Hmoov av nplaum
Ua ib yam khoom siv rau phab ntsa, kev ua tau zoo ntawm kev tsim kho thiab cov khoom tiav zoo ntawm cov hmoov putty muaj feem cuam tshuam nrog lub luag haujlwm ntawm HPMC. HPMC tuaj yeem txhim kho qhov du thiab khaws dej ntawm cov hmoov putty, tiv thaiv phab ntsa tawg thiab hmoov, thiab txhim kho qhov ruaj khov thiab zoo nkauj ntawm cov khoom tiav.
2.4. Cov khoom siv ua los ntawm gypsum
Hauv gypsum-based self-leveling thiab caulking gypsum, HPMC muab cov khoom zoo heev rau thickening thiab dej khaws cia, txhim kho qhov tsis kam shrinkage thiab kev ua haujlwm ntawm cov khoom gypsum, thiab zam kev tawg thiab tsis muaj zog txaus los ntawm kev poob dej ntau dhau.
2.5. Txheej tiv dej
HPMC siv tau ua cov khoom ua kom tuab thiab ruaj khov rau cov txheej tiv thaiv dej, ua rau cov txheej zoo dua rheology thiab cov khoom ua yeeb yaj kiab kom ntseeg tau tias cov txheej sib xws thiab lo rau.
2.6. Tshuaj tsuag plaster thiab tshuaj tsuag mortar
Hauv kev txau tshuaj, HPMC muab kev ua haujlwm zoo thiab kev nqus dej, thaum txo cov tsos mob sag thiab delamination, txhim kho kev ua haujlwm zoo thiab zoo ntawm kev txau tshuaj.
2.7. Lub tshuab rwb thaiv tsev phab ntsa sab nraud
Hauv cov txheej txheem rwb thaiv tsev phab ntsa sab nraud, HPMC khaws dej thiab tiv thaiv kev plam ua lub luag haujlwm tseem ceeb hauv kev sib txuas thiab plastering mortars. Nws tuaj yeem txhim kho kev ua haujlwm ntawm kev tsim kho mortar thiab xyuas kom meej tias lub kaw lus rwb thaiv tsev ruaj khov thiab ruaj khov.
3. Cov txiaj ntsig ntawm HPMC hauv kev lag luam kev tsim kho
Kev ua tau zoo dua ntawm kev tsim kho: Kev ntxiv HPMC ua rau cov ntaub ntawv tsim kho ua haujlwm tau zoo dua, cov txheej txheem tsim kho du dua, thiab cov khoom pov tseg thiab qhov nyuaj ntawm kev tsim kho raug txo qis.
Txo cov teeb meem zoo: Tom qab cov dej khaws cia thiab lo rau zoo dua, cov khoom yuav muaj teeb meem tsawg dua xws li tawg thiab delamination, txhim kho qhov zoo ntawm cov khoom tiav.
Kev txuag hluav taws xob thiab kev tiv thaiv ib puag ncig: Kev ua haujlwm siab ntawm HPMC ua rau cov khoom siv ua haujlwm zoo dua, txo cov khoom pov tseg los ntawm kev tsim kho dua tshiab, thiab muaj txiaj ntsig zoo rau kev txuag hluav taws xob thiab kev tiv thaiv ib puag ncig.
Kev tswj tus nqi: Los ntawm kev txhim kho kev ua tau zoo ntawm cov khoom siv, tus nqi ntawm kev saib xyuas thiab hloov pauv tom qab raug txo qis, ua rau nws pheej yig heev.
4. Cov qauv kev loj hlob yav tom ntej
Raws li kev lag luam kev tsim kho qhov kev thov rau cov khoom siv ua tau zoo thiab ntsuab zoo rau ib puag ncig nce ntxiv, lub peev xwm ntawm HPMC hauv kev hloov kho thiab kev siv sib xyaw tseem tab tom tshawb nrhiav. Piv txwv li, kev sib xyaw HPMC nrog lwm cov tshuaj hloov kho kom tsim cov qauv tshwj xeeb rau cov xwm txheej thov sib txawv yog qhov kev taw qhia tseem ceeb rau kev txhim kho yav tom ntej. Tsis tas li ntawd, kev txhim kho ntxiv nws qhov kev ua tau zoo ruaj khov thiab kev ua haujlwm zoo los ntawm kev ua kom zoo dua qub kuj yog qhov tseem ceeb ntawm kev tshawb fawb kev lag luam.
Hydroxypropyl methylcellulose ua lub luag haujlwm tseem ceeb hauv kev lag luam kev tsim kho vim nws cov khoom zoo heev. Txij li cov cement mortar mus rau cov nplaum pobzeb, los ntawm hmoov putty mus rau cov txheej txheem tiv thaiv dej, kev siv HPMC npog txhua yam ntawm cov ntaub ntawv tsim kho. Yav tom ntej, nrog kev nce qib ntawm thev naus laus zis thiab kev siv tob, HPMC yuav ua lub luag haujlwm tseem ceeb dua hauv kev pab kev lag luam kev tsim kho kom ua tiav kev ua tau zoo, kev siv hluav taws xob tsawg thiab kev tiv thaiv ib puag ncig ntsuab.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-26-2024