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, binding, dispersing, emulsifying, film-forming, suspending, adsorbing, gelling, surfactant, moisture-retaining thiab protective colloid. Hydroxypropyl methylcellulose thiab methylcellulose siv tau rau hauv cov ntaub ntawv siv hauv kev tsim kho, kev lag luam xim, synthetic resin, kev lag luam ceramic, tshuaj, khoom noj, textile, kev ua liaj ua teb, tshuaj txhua hnub thiab lwm yam lag luam.
Cov mis tshuaj:
Hydroxypropylmethylcellulose (HPMC) [C6H7O2(OH) 3-mn(OCH3)m(OCH2CH(OH)CH3)n] x
Daim ntawv thov tseem ceeb ntawm hydroxypropyl methylcellulose HPMC hauv cov ntaub ntawv tsim kho:
1. cov cement raws li 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 Pob Zeb Ua Los Ntawm Pob Zeb
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 siv sib koom ua ke ntawm vaj huam sib luag
⑴ Khaws dej tau zoo heev, ua kom lub sijhawm qhib ntev dua thiab txhim kho kev ua haujlwm zoo dua. Muaj roj nplua nyeem ntau, yooj yim dua rau kev sib tov. ⑵ Txhim kho kev tiv thaiv kev ntsws thiab kev tawg, txhim kho qhov zoo ntawm cov 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 tau yooj yim qhuav, tsis muaj pob, ua kom nrawm 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 sijhawm qhib, kev ua haujlwm ntawm cov vuas vov tuaj yeem txhim kho thiab muaj txiaj ntsig zoo rau kev nplaum.
6. Cov ntaub ntawv hauv pem teb uas ua rau nws tus kheej sib npaug ⑴ muab viscosity thiab siv tau ua cov tshuaj tiv thaiv kev ua kom av noo. ⑵Txhim kho qhov muaj peev xwm ntawm kev nqus dej thiab txhim kho kev ua haujlwm ntawm kev paving hauv av. ⑶ Tswj kev khaws dej thiab kev ntsws, txo cov kab nrib pleb thiab kev ntsws ntawm hauv av.
7. Xim pleev xim uas muaj dej ⑴Tiv thaiv kom tsis txhob muaj dej khov thiab ua kom lub thawv siv tau ntev. Kev ruaj khov ntawm lub cev muaj zog heev, sib haum xeeb zoo nrog lwm cov khoom. ⑵ Txhim kho kev ntws dej, muab cov khoom tiv thaiv kev txaws, tiv thaiv kev poob qis thiab kev sib npaug, thiab xyuas kom meej tias qhov chaw tiav zoo heev.
8. Hmoov ntawv phab ntsa ⑴ Yaj sai sai yam tsis muaj pob, uas zoo rau kev sib tov. ⑵ muab lub zog sib txuas siab.
9. Cov cement board extruded (1) muaj kev sib koom ua ke thiab lubricity siab, thiab ua rau cov khoom extruded muaj peev xwm ua haujlwm tau zoo dua. ⑵ Txhim kho lub zog ntsuab, txhawb kev noo thiab kev kho kom zoo, thiab ua rau cov qoob loo ntau ntxiv.
10. Cov khoom HPMC uas siv rau cov mortar sib xyaw ua ke Cov khoom HPMC uas siv rau cov mortar sib xyaw ua ke muaj cov dej zoo dua hauv cov mortar sib xyaw ua ke dua li cov khoom ib txwm, ua kom cov khoom siv cementitious inorganic muaj dej txaus, tiv thaiv kev txo qis ntawm lub zog sib txuas los ntawm kev qhuav ntau dhau, thiab cov kab nrib pleb 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 me me, sib npaug thiab sib npaug, 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 ua kom lub sijhawm qhib ntawm cov mortar sib xyaw ua ke ntev dua thiab txo qhov nyuaj ntawm kev tsim kho.
Lub sijhawm tshaj tawm: Tsib Hlis-24-2023