1. Hydroxypropyl methylcellulose (HPMC)yog ib qho cellulose ether uas tsis yog ionic siv dav hauv kev lag luam kev tsim kho, feem ntau yog ua cov khoom tawg, cov khoom ua kom tuab thiab cov khoom sib txuas. Nws muaj cov dej solubility zoo heev, ua kom tuab, khaws dej thiab lubricity, thiab tuaj yeem txhim kho kev ua haujlwm ntawm kev tsim kho thiab qhov kawg ntawm cov ntaub ntawv tsim kho. Yog li ntawd, HPMC yog siv dav hauv cov ntaub ntawv tsim kho xws li cement mortar, vuas nplaum, hmoov putty, self-leveling mortar, thiab lwm yam.
2. Lub luag haujlwm ntawm HPMC ua tus neeg faib khoom
Lub luag haujlwm tseem ceeb ntawm cov tshuaj dispersant yog kom faib cov khoom khov kho kom sib npaug hauv cov dej, tiv thaiv cov khoom sib sau ua ke, thiab txhim kho kev ruaj khov ntawm cov ntaub ntawv tsim kho. Ua ib qho tshuaj dispersant zoo heev, HPMC ua lub luag haujlwm hauv qab no hauv cov ntaub ntawv tsim kho:
Tiv thaiv kom tsis txhob muaj cov khoom me me hauv cov av: HPMC tuaj yeem txo qhov nrawm ntawm cov khoom me me hauv cov cement lossis gypsum slurry, ua rau cov khoom sib xyaw zoo dua, yog li txhim kho qhov fluidity thiab uniformity ntawm cov ntaub ntawv tsim kho.
Txhim kho kev ua haujlwm ntawm cov ntaub ntawv: Hauv kev tsim cov tshuaj khib, hmoov putty thiab lwm yam ntaub ntawv, HPMC tuaj yeem txhim kho cov nyhuv dispersion ntawm hmoov, ua rau cov ntaub ntawv siv du dua thaum lub sijhawm tsim kho, thiab zam kev sib sau ua ke thiab sib sau ua ke.
Txhim kho cov tshuaj tiv thaiv cement hydration: HPMC pab faib cov cement sib npaug, ua kom zoo dua cov txheej txheem tshuaj tiv thaiv hydration, thiab txhim kho lub zog thiab kev ruaj khov ntawm cov cement paste.
3. Lub luag haujlwm ntawm HPMC ua ib qho thickener
Lub luag haujlwm tseem ceeb ntawm cov khoom ua kom tuab yog ua kom cov viscosity ntawm lub kaw lus nce ntxiv kom cov ntaub ntawv hauv tsev muaj kev ua haujlwm zoo dua thaum lub sijhawm tsim kho. Ua ib qho khoom ua kom tuab zoo heev, HPMC cov haujlwm tseem ceeb hauv kev lag luam tsim kho suav nrog:
Ua kom cov mortar viscosity nce ntxiv: HPMC tuaj yeem ua kom cov viscosity nce ntxiv hauv mortar, hmoov putty, nplaum pobzeb thiab lwm yam khoom siv hauv tsev, ua rau nws yooj yim dua los tsim thiab txo qhov sagging, tshwj xeeb tshaj yog haum rau kev tsim kho ntsug, xws li txheej phab ntsa.
Txhim kho kev khaws dej: HPMC tuaj yeem txhim kho lub peev xwm khaws dej ntawm cov cement mortar, txo qhov poob dej, tiv thaiv cov kab nrib pleb los ntawm kev poob dej ntau dhau, thiab txhim kho kev ruaj khov ntawm cov ntaub ntawv tsim kho.
Txhim kho kev ua tau zoo ntawm kev tsim kho: Hauv cov ntawv thov xws li cov tshuaj mortar uas nws tus kheej leveling, HPMC tuaj yeem txhim kho qhov fluidity thiab xyuas kom meej viscosity tsim nyog, yog li ua kom ntseeg tau tias cov ntaub ntawv sib kis thaum lub sijhawm tsim kho thiab txhim kho qhov tiaj tiaj ntawm hauv pem teb.
4. Lub luag haujlwm ntawm HPMC ua tus binder
Lub luag haujlwm tseem ceeb ntawm cov binder yog los txhim kho kev sib txuas ntawm cov ntaub ntawv thiab xyuas kom meej tias kev tsim kho ruaj khov. Ua ib qho binder, daim ntawv thov ntawm HPMC hauv cov ntaub ntawv tsim kho suav nrog:
Txhim kho lub zog sib txuas ntawm cov nplais pobzeb: HPMC muab cov nplais pobzeb cov khoom sib txuas siab dua, ua rau kev sib txuas ntawm cov pobzeb thiab txheej hauv paus muaj zog dua thiab txo qhov kev pheej hmoo ntawm cov pobzeb poob.
Txhim kho qhov kev nplaum ntawm cov hmoov putty: Hauv phab ntsa putty, HPMC tuaj yeem txhim kho lub peev xwm sib txuas ntawm putty thiab txheej hauv paus, txhim kho qhov ruaj khov thiab tawg tsis kam ntawm putty, thiab xyuas kom meej tias phab ntsa du thiab tiaj tus.
Txhim kho qhov ruaj khov ntawm cov tshuaj khib nyiab uas nws tus kheej ua kom zoo: HPMC txhim kho lub zog sib txuas ntawm cov tshuaj khib nyiab uas nws tus kheej ua kom zoo los ntawm kev tswj qhov dej ntws, tiv thaiv kev faib ua pawg thiab tawg, thiab ua rau nws ruaj khov dua thaum lub sijhawm tsim kho.
Hydroxypropyl methylcellulose (HPMC) ua lub luag haujlwm tseem ceeb ua tus neeg faib khoom, cov khoom ua kom tuab thiab cov khoom sib txuas hauv cov ntaub ntawv tsim kho. Nws tsis tsuas yog txhim kho kev ua tau zoo ntawm cov ntaub ntawv tsim kho, tab sis kuj tseem ua kom zoo dua qhov kev siv kawg. HPMC txhim kho qhov fluidity thiab uniformity ntawm mortar los ntawm kev faib cov khoom khov thiab tiv thaiv kev ua kom av noo; nws txhim kho qhov viscosity thiab dej khaws cia ntawm cov ntaub ntawv los ntawm kev ua kom tuab, thiab txo cov kab nrib pleb thiab sagging; ua ib qho khoom sib txuas, nws txhim kho qhov adhesion ntawm cov ntaub ntawv xws li cov nplais nplaum thiab hmoov putty, xyuas kom meej tias muaj kev ruaj khov thiab ruaj khov ntawm kev tsim kho. Yog li ntawd, HPMC tau dhau los ua ib qho khoom siv tseem ceeb hauv kev lag luam tsim kho niaj hnub no, muab kev txhawb nqa zoo rau kev txhim kho qhov zoo ntawm lub tsev thiab kev ua haujlwm ntawm kev tsim kho.
Lub sijhawm tshaj tawm: Lub Peb Hlis-25-2025