Hydroxypropyl Methylcellulose (HPMC) yog ib qho tshuaj cellulose ether uas tsis yog ionic siv dav hauv cov ntaub ntawv siv hauv kev tsim kho, khoom noj, tshuaj thiab cov tshuaj siv niaj hnub. Hauv cov pob zeb ua vaj tse, HPMC, ua ib qho khoom ntxiv, muaj ntau yam haujlwm tshwj xeeb thiab qhov zoo thiab tuaj yeem txhim kho kev ua haujlwm ntawm cov pob zeb ua vaj tse.
Lub luag haujlwm ntawm HPMC hauv kev ua vaj tse
1. Txhim kho qhov ua haujlwm tau ntawm cov pob zeb ua vaj tse
Ib qho ntawm cov haujlwm tseem ceeb ntawm HPMC yog los txhim kho kev ua haujlwm ntawm cov pob zeb ua vaj tse, uas yog, yooj yim rau kev siv thiab kev ua haujlwm yooj yim. HPMC muaj cov nyhuv ua kom tuab zoo thiab tuaj yeem ua rau cov viscosity ntawm cov pob zeb ua vaj tse, ua rau nws yooj yim dua rau kev nthuav dav thiab duab thaum lub sijhawm tsim kho. Tsis tas li ntawd, HPMC tuaj yeem txhim kho kev khaws cia dej ntawm cov pob zeb ua vaj tse, tiv thaiv kev ua kom dej qhuav sai sai hauv qhov kub siab lossis cua qhuav, thiab tswj cov yas ntawm cov pob zeb ua vaj tse.
2. Txhim kho qhov tuav dej ntawm cov pob zeb
HPMC tuaj yeem txhim kho qhov kev khaws dej ntawm cov pob zeb ua vaj tse. Qhov no yog vim tias cov hydroxyl thiab methoxy pawg hauv cov qauv molecular ntawm HPMC muaj peev xwm nqus dej tau zoo, uas tuaj yeem nqus thiab khaws dej thiab txo qhov poob dej. Qhov kev khaws dej no yog qhov tseem ceeb rau cov txheej txheem tawv ntawm cov pob zeb ua vaj tse, tshwj xeeb tshaj yog nyob rau hauv qhov chaw qhuav, kom tiv thaiv cov kab nrib pleb ntawm qhov chaw ua vaj tse thiab xyuas kom meej tias cov pob zeb ua vaj tse tawv thiab muaj zog.
3. Txhim kho qhov tawg tsis kam ntawm cov pob zeb ua vaj tse
HPMC tuaj yeem txhim kho qhov kev khaws dej ntawm cov pob zeb thiab tiv thaiv kom dej tsis txhob evaporate sai dhau, yog li txo cov kab nrib pleb uas tshwm sim los ntawm kev poob dej. Tsis tas li ntawd, qhov cuam tshuam ntawm HPMC kuj tseem pab txo qhov kev sib cais thiab kev los ntshav ntawm cov slurry pob zeb, ntxiv txo qhov tshwm sim ntawm cov kab nrib pleb. Tshwj xeeb tshaj yog nyob rau hauv cov pob zeb loj lossis qhov chaw kub siab, qhov cuam tshuam tiv thaiv kev tawg ntawm HPMC yog qhov tseem ceeb heev.
4. Txhim kho qhov kev sib txuas ntawm cov pob zeb
HPMC tuaj yeem txhim kho cov khoom sib txuas ntawm cov pob zeb thiab cov khoom sib txawv. Qhov no yog vim tias cov tshuaj colloidal uas tsim los ntawm HPMC yaj hauv dej tuaj yeem tsim cov zaj duab xis nyias nyias ntawm qhov chaw ntawm cov pob zeb kom txhim kho lub zog sib txuas ntawm cov pob zeb thiab lwm yam khoom siv. Qhov no tseem ceeb heev rau cov ntawv thov xws li plaster mortars thiab cov nplaum pobzeb, uas tuaj yeem txhim kho qhov zoo ntawm kev tsim kho thiab kev ruaj khov.
5. Kho lub sijhawm teeb tsa ntawm cov pob zeb
HPMC muaj qee yam haujlwm ntawm kev tswj lub sijhawm coagulation. Raws li qhov xav tau, los ntawm kev kho qhov ntau ntawm HPMC ntxiv, lub sijhawm teeb tsa ntawm cov pob zeb tuaj yeem ntev lossis luv dua, uas ua rau kev npaj tsim kho thiab kev tswj hwm kev nce qib yooj yim. Qhov no tseem ceeb heev thaum kev tsim kho xav tau lub sijhawm ntev lossis nyob rau hauv qhov kub siab. Nws tuaj yeem tiv thaiv cov pob zeb kom tsis txhob khov sai dhau thiab xyuas kom meej tias kev tsim kho zoo.
6. Txhim kho qhov khov-thaw tsis kam ntawm cov pob zeb ua vaj tse
Qhov kev khaws dej thiab ua kom tuab ntawm HPMC tuaj yeem txhim kho cov qauv sab hauv ntawm cov pob zeb ua vaj tse thiab ua rau nws ntom dua, yog li txhim kho qhov kev tiv thaiv khov-thaw ntawm cov pob zeb ua vaj tse. Hauv thaj chaw txias lossis cov haujlwm uas xav tau kev tiv thaiv cov voj voog khov-thaw, ntxiv HPMC tuaj yeem tiv thaiv kev tawg thiab spalling ntawm cov pob zeb ua vaj tse los ntawm cov voj voog khov-thaw thiab ntev nws lub neej kev pabcuam.
Daim ntawv thov ntawm HPMC hauv kev ua vaj tse
HPMC siv dav hauv cov pob zeb ua vaj tse, tshwj xeeb tshaj yog hauv cov hauv qab no:
1. Cov tshuaj txhuam qhuav
Hauv cov tshuaj mortar qhuav, HPMC tuaj yeem txhim kho qhov kev khaws cia dej thiab kev ua haujlwm ntawm cov tshuaj mortar, tiv thaiv dej kom tsis txhob evaporate sai dhau, thiab txhim kho kev ua haujlwm zoo thiab zoo ntawm kev tsim kho. Tsis tas li ntawd, HPMC kuj tseem tuaj yeem txhim kho qhov kev tiv thaiv kab nrib pleb thiab kev nplaum ntawm cov tshuaj mortar thiab ua rau nws lub neej ua haujlwm ntev dua.
2. Cov nplaum rau pobzeb
Ntxiv HPMC rau cov nplaum pobzeb tuaj yeem txhim kho nws cov viscosity thiab lub zog sib txuas, ua kom cov pobzeb tsis yooj yim swb thiab poob thaum lub sijhawm tso. HPMC kuj tseem tuaj yeem txhim kho kev khaws dej thiab kev tawg ntawm cov nplaum pobzeb ceramic, tiv thaiv cov pobzeb ceramic kom tsis txhob tawg vim dej poob lossis qhuav ntsws.
3. Cov tshuaj nplaum
Hauv cov tshuaj pleev plastering, HPMC tuaj yeem txhim kho qhov fluidity thiab dej tuav ntawm cov tshuaj pleev, ua rau nws yooj yim dua rau kev thov thiab duab thaum lub sijhawm tsim kho, txo qhov nyuaj ntawm kev tsim kho thiab kev siv zog ua haujlwm. Tib lub sijhawm, HPMC kuj tseem tuaj yeem txhim kho qhov tsis kam tawg thiab lub zog sib txuas ntawm cov tshuaj pleev kom ntseeg tau tias cov txheej plaster du thiab ruaj khov.
4. Pem teb uas nws tus kheej leveled
Ntawm cov ntaub ntawv hauv pem teb uas nws tus kheej leveling, HPMC tuaj yeem txhim kho nws cov fluidity thiab dej tuav, xyuas kom meej tias cov ntaub ntawv hauv pem teb tuaj yeem nws tus kheej leveling thaum lub sijhawm tsim kho, thiab txo cov qhov tsis zoo ntawm kev tsim kho thiab qhov tsis sib xws ntawm qhov chaw. Tsis tas li ntawd, HPMC kuj tseem tuaj yeem txhim kho qhov tawg tsis kam thiab hnav tsis kam ntawm cov ntaub ntawv hauv pem teb, txhim kho lawv lub neej kev pabcuam thiab kev zoo nkauj.
Kev siv hydroxypropyl methylcellulose (HPMC) hauv cov pob zeb ua vaj tse muaj ntau yam zoo thiab tuaj yeem txhim kho qhov ua haujlwm tau zoo, khaws dej, tiv thaiv kev tawg, nplaum thiab khov-thaw tiv thaiv ntawm cov pob zeb ua vaj tse. Los ntawm kev ntxiv thiab siv HPMC kom zoo, qhov zoo ntawm kev tsim kho thiab kev ruaj khov ntawm cov pob zeb ua vaj tse tuaj yeem txhim kho kom tau raws li ntau yam kev xav tau ntawm engineering. Yav tom ntej, nrog rau kev nce qib ntawm thev naus laus zis thiab kev txhawb nqa cov ntawv thov tas mus li, lub luag haujlwm ntawm HPMC hauv cov pob zeb ua vaj tse yuav tseem ceeb dua, coj ntau yam txiaj ntsig kev lag luam thiab kev sib raug zoo.
Lub sijhawm tshaj tawm: Lub Xya Hli-23-2024