Hydroxypropyl methylcellulose (HPMC) yog ib hom cellulose ether uas tsis yog ionic ua los ntawm cov khoom siv polymer ntuj cellulose los ntawm ntau yam txheej txheem tshuaj lom neeg. Lawv yog cov hmoov dawb tsis muaj ntxhiab, tsis muaj saj thiab tsis muaj tshuaj lom uas swells mus rau hauv cov kua colloidal meej lossis me ntsis cloudy hauv dej txias. Nws muaj thickening, bonding, dispersing, emulsifying, zaj duab xis-tsim, suspending, adsorbing, gelling, superficial, noo noo-tuav thiab tiv thaiv colloid. Hydroxypropyl methyl cellulose thiab methyl cellulose tuaj yeem siv rau hauv cov ntaub ntawv tsim kho, kev lag luam xim, cov khoom siv hluavtaws, kev lag luam ceramic, tshuaj, khoom noj, textile, kev ua liaj ua teb, tshuaj txhua hnub thiab lwm yam lag luam.
Daim ntawv thov tseem ceeb ntawm hydroxypropyl methylcellulose HPMC hauv cov ntaub ntawv tsim kho:
1. Cov cement-based plaster
⑴ Txhim kho qhov sib npaug, ua rau plastering yooj yim dua rau trowel, txhim kho kev tiv thaiv sagging, txhim kho fluidity thiab pumpability, thiab txhim kho kev ua haujlwm zoo.
⑵ Khaws dej tau zoo, ua kom lub sijhawm khaws cia ntawm cov pob zeb mortar ntev dua, txhim kho kev ua haujlwm zoo, thiab pab txhawb kev ua kom cov pob zeb mortar noo thiab khov kom muaj zog heev.
⑶ Tswj kev nkag los ntawm huab cua kom tshem tawm cov kab nrib pleb ntawm qhov chaw txheej thiab tsim kom muaj qhov chaw du zoo tagnrho.
2. Cov plaster thiab cov khoom siv gypsum uas ua los ntawm gypsum
⑴ Txhim kho qhov sib npaug, ua rau plastering yooj yim dua rau trowel, txhim kho kev tiv thaiv sagging, txhim kho fluidity thiab pumpability, thiab txhim kho kev ua haujlwm zoo.
⑵ Khaws dej tau zoo, ua kom lub sijhawm khaws cia ntawm cov pob zeb mortar ntev dua, txhim kho kev ua haujlwm zoo, thiab pab txhawb kev ua kom cov pob zeb mortar noo thiab khov kom muaj zog heev.
⑶ Tswj qhov sib xws ntawm cov mortar kom tsim tau ib txheej txheej zoo tagnrho.
3. Cov av nplaum masonry
⑴ Txhim kho qhov kev nplaum nrog qhov chaw ntawm lub masonry, txhim kho qhov kev tuav dej, thiab txhim kho lub zog ntawm cov mortar.
⑵ Txhim kho qhov lubricity thiab plasticity, thiab txhim kho kev tsim kho; cov mortar txhim kho los ntawm cellulose ether yooj yim dua rau kev tsim kho, txuag lub sijhawm tsim kho thiab txo cov nqi tsim kho.
⑶ Cov cellulose ether uas khaws dej tau zoo heev, tsim nyog rau cov cib uas nqus dej tau zoo.
4. Cov khoom sib koom ua ke ntawm cov phaj
⑴Zoo heev rau kev khaws dej, ua kom lub sijhawm qhib ntev dua thiab txhim kho kev ua haujlwm kom zoo dua. Muaj roj nplua nyeem ntau, yooj yim dua rau kev sib tov.
⑵ Txhim kho qhov tsis kam ntawm shrinkage thiab tawg, txhim kho qhov zoo ntawm txheej.
⑶ Txhim kho qhov kev sib txuas ntawm qhov chaw sib txuas thiab muab cov qauv du thiab du.
5. Cov nplaum rau pobzeb
⑴Cov khoom xyaw sib tov yooj yim rau qhuav, tsis muaj kev sib sau ua ke, ua kom daim ntawv thov ceev dua, txhim kho kev ua haujlwm ntawm kev tsim kho, txuag lub sijhawm ua haujlwm thiab txo cov nqi ua haujlwm.
⑵ Los ntawm kev ncua lub sijhawm qhib, qhov ua tau zoo ntawm kev vuas vov tuaj yeem txhim kho thiab muaj txiaj ntsig zoo rau kev nplaum.
6. Cov khoom siv hauv pem teb uas nws tus kheej leveling
⑴Muab viscosity thiab siv tau ua cov tshuaj tiv thaiv sedimentation.
⑵Txhim kho qhov pumpability ntawm fluidity thiab txhim kho qhov ua tau zoo ntawm paving hauv av.
⑶ Tswj cov dej khaws cia thiab ntsws, txo cov kab nrib pleb thiab ntsws ntawm hauv av.
7. Xim dej
⑴Tiv thaiv kom tsis txhob muaj cov khoom khov thiab ua kom lub thawv siv tau ntev. Kev ruaj khov ntawm lub cev muaj zog heev, sib haum xeeb zoo nrog lwm yam khoom.
⑵ Txhim kho qhov fluidity, muab cov khoom zoo tiv thaiv kev txaws, tiv thaiv kev sagging thiab leveling, thiab xyuas kom meej tias qhov chaw tiav zoo heev.
8. Hmoov Phab Ntsa
⑴ Yaj sai sai yam tsis muaj pob, uas zoo rau kev sib tov.
⑵ muab lub zog sib txuas siab.
9. Lub rooj tsavxwm cement extruded
⑴ Nws muaj kev sib koom ua ke thiab lubricity siab, thiab ua rau cov khoom siv extruded ua haujlwm tau zoo dua.
⑵ Txhim kho lub zog ntsuab, txhawb kev nqus dej thiab kev kho kom zoo, thiab nce cov qoob loo.
10. Cov khoom HPMC rau cov tshuaj mortar sib xyaw ua ke
Cov khoom HPMC tshwj xeeb siv rau cov mortar sib xyaw ua ke muaj cov dej zoo dua li cov khoom siv hauv cov mortar sib xyaw ua ke, ua kom ntseeg tau tias cov khoom siv cementitious inorganic muaj dej txaus, thiab tiv thaiv kom tsis txhob muaj zog ntawm kev sib txuas los ntawm kev qhuav thiab tawg ntau dhau los ntawm kev qhuav shrinkage. HPMC kuj muaj qee qhov cuam tshuam rau huab cua. Cov khoom HPMC tshwj xeeb siv rau cov mortar sib xyaw ua ke muaj cov pa cua uas muaj huab cua txaus, sib npaug thiab me me, uas tuaj yeem txhim kho lub zog thiab kev du ntawm cov mortar sib xyaw ua ke. Cov khoom HPMC tshwj xeeb siv rau cov mortar sib xyaw ua ke muaj qee qhov cuam tshuam qeeb, uas tuaj yeem ncua lub sijhawm qhib ntawm cov mortar sib xyaw ua ke thiab txo qhov nyuaj ntawm kev tsim kho. Hydroxypropyl methylcellulose (HPMC) yog cov cellulose ether tsis-ionic ua los ntawm cov khoom siv polymer ntuj cellulose los ntawm ntau cov txheej txheem tshuaj lom neeg. Lawv yog cov hmoov dawb tsis muaj ntxhiab, tsis muaj saj thiab tsis muaj tshuaj lom uas swells rau hauv cov kua colloidal meej lossis me ntsis pos huab hauv dej txias. Nws muaj cov yam ntxwv ua kom tuab, ua kom sib txuas, ua kom tawg, ua kom emulsifying, ua kom zaj duab xis, ua kom ncua, ua kom nqus, ua kom gelling, ua kom sab nraud, ua kom noo noo thiab tiv thaiv cov colloid. Hydroxypropyl methyl cellulose thiab methyl cellulose siv tau rau hauv cov ntaub ntawv siv hauv kev tsim kho, kev lag luam pleev xim, cov khoom siv hluavtaws, kev lag luam ceramic, tshuaj, khoom noj, textile, kev ua liaj ua teb, tshuaj lom neeg txhua hnub thiab lwm yam lag luam.
Lub sijhawm tshaj tawm: Lub Ib Hlis-11-2023