qhia
Hydroxypropyl methylcellulose, feem ntau hu ua HPMC, yog cov khoom siv ntau yam siv dav hauv kev tsim kho kev lag luam raws li cov tshuaj khib nyiab.Cov tshuaj ntxiv no ua lub luag haujlwm tseem ceeb hauv kev txhim kho cov kev ua tau zoo thiab cov khoom ntawm cov mortars siv ntau yam xws li masonry, vuas thiab plasters.
1. Nkag siab txog HPMC
A. Cov qauv tshuaj thiab muaj pes tsawg leeg
Hydroxypropylmethylcellulose belongs rau tsev neeg cellulose ether thiab yog muab los ntawm ntuj polymers xws li ntoo los yog paj rwb pulp.Nws cov qauv tshuaj muaj cov piam thaj txuas los ntawm β-(1 → 4)-glycosidic bonds.Hydroxypropyl thiab methyl pawg txuas nrog cellulose caj qaum muab HPMC cov khoom tshwj xeeb.
B. Lub cev muaj zog
Solubility: HPMC pom zoo solubility nyob rau hauv dej, tsim kom meej, viscous daws.
Rheological cwj pwm: Cov khoom rheological ntawm HPMC tuaj yeem hloov kho los tswj cov viscosity thiab ntws cov khoom ntawm cov tshuaj khib.
Thermal Stability: HPMC tseem nyob ruaj khov nyob rau hauv ntau qhov kub thiab txias, ua rau nws tsim nyog rau kev tsim kho hauv ntau yam kev mob ib puag ncig.
2. Lub luag haujlwm ntawm HPMC hauv mortar
A. Kev tuav dej
HPMC yog tus neeg saib xyuas dej zoo uas tiv thaiv kom tsis txhob ya raws sai ntawm cov tshuaj khib nyiab.Qhov no yog qhov tseem ceeb los tswj kev ua haujlwm thiab cia sijhawm txaus rau kev thov kom raug.
B. Txhim kho adhesion
Cov khoom nplaum ntawm HPMC pab txhawb kev sib raug zoo ntawm cov mortar thiab substrate, yog li ua kom lub zog tag nrho thiab ua haujlwm ntev ntawm cov khoom siv hauv tsev.
C. Kho rheology
Los ntawm kev hloov kho tus cwj pwm rheological ntawm mortar, HPMC pab tswj nws qhov sib xws, yooj yim ntawm daim ntawv thov, thiab muaj peev xwm ua raws li qhov chaw ntsug yam tsis muaj sagging.
D. Anti-sagging
Cov khoom thixotropic ntawm mortars uas muaj HPMC xyuas kom meej tias cov khoom tseem nyob rau hauv qhov chaw ntsug, tiv thaiv sagging los yog vau thaum tsim kho.
E. Teem sijhawm tswj
HPMC tuaj yeem tswj hwm lub sijhawm teem sijhawm ntawm mortars, kom ntseeg tau tias lawv kho tau ntawm tus nqi zoo kom tau raws li cov kev thov tshwj xeeb.
3. Kev siv HPMC hauv kev tsim kho
A. Masonry mortar
HPMC feem ntau yog siv rau hauv masonry mortars los txhim kho kev ua haujlwm, kev tuav dej thiab kev sib raug zoo, yog li txhim kho kev tsim kho kom zoo thiab kav ntev.
B. Pobzeb Adhesive
Nyob rau hauv cov pobzeb nplaum formulations, HPMC xyuas kom zoo adhesion, txo slippage thiab txhim khu kev yooj yim ntawm daim ntawv thov rau txhim khu kev qha thiab zoo nkauj pobzeb installation.
C. Plastering
Ntxiv HPMC rau plastering mortars txhim kho cov dej tuav, kev ua haujlwm thiab adhesion, ua rau smoother, ntau ruaj tiav rau phab ntsa thiab qab nthab.
4. Cov txiaj ntsig ntawm kev siv HPMC hauv mortar
A. Txhim kho kev ua haujlwm
HPMC txhim kho kev ua haujlwm ntawm cov mortar, ua rau daim ntawv thov thiab tuav thaum tsim kho yooj yim dua.
B. Ua kom cov dej khaws cia
Cov dej tuav cov khoom ntawm HPMC pab tiv thaiv kom tsis txhob ya raws sai, kom ntseeg tau tias cov mortar tseem nyob rau lub sijhawm ntev, ua kom yooj yim rau kev tso thiab ua tiav.
C. Txhim kho adhesion thiab kev sib txuas lub zog
Cov khoom nplaum ntawm HPMC pab ntxiv dag zog rau kev sib raug zoo ntawm mortar thiab substrate, yog li txhim kho cov qauv kev ntseeg siab.
D. ruaj khov zoo
Kev siv HPMC nyob rau hauv mortar formulations tso cai rau kev tswj ntau dua ntawm cov khoom siv, uas ua rau muaj qhov zoo ib yam thoob plaws hauv qhov kev tsim kho.
5 Kev xaus
Hydroxypropyl methylcellulose (HPMC) yog ib qho tseem ceeb ntawm kev tsim kho kev lag luam raws li mortar stabilizer nrog ntau yam kev siv.Nws cov khoom tshwj xeeb pab txhim kho kev ua haujlwm, dej tuav, adhesion thiab tag nrho kev ua haujlwm ntawm mortars hauv masonry, pobzeb thiab plaster daim ntaub ntawv.Raws li kev tsim kho txuas ntxiv mus, HPMC tseem yog cov khoom tseem ceeb, muab cov neeg tsim thiab cov neeg cog lus nrog cov cuab yeej kom ua tiav cov qauv zoo dua, ua haujlwm ntev thiab ua haujlwm ntawm cov haujlwm.
Post lub sij hawm: Dec-18-2023