HPMC (Hydroxypropyl Methyl Cellulose) yog cov khoom siv polymer dav siv hauv kev tsim kho kev lag luam. Nyob rau hauv xyoo tas los no, nws tau muaj kev cuam tshuam loj heev rau cov khoom siv hauv tsev thiab kev tsim kho hauv ntau txoj hauv kev. Cov yam ntxwv tseem ceeb ntawm HPMC suav nrog kev txhim kho cov adhesion, dej tuav thiab tawg tsis kam ntawm cov khoom siv, uas ua rau nws siv ntau dua thiab dav siv hauv cov khoom siv hauv tsev xws li pob zeb, mortar thiab coatings, thiab txhawb kev tsim kho tshiab thiab kev ua haujlwm ntawm kev tsim kho kev lag luam.
1. Txhim kho kev tsim kho kom zoo thiab zoo
Lub luag haujlwm ncaj qha tshaj plaws ntawm HPMC hauv kev tsim kho kev lag luam yog txhim kho kev tsim kho kom zoo thiab cov khoom siv zoo. Hauv cov tsev ib txwm muaj, kev ua haujlwm thiab kev tuav dej ntawm mortar yeej ib txwm yog ib qho tseem ceeb cuam tshuam rau kev tsim kho thiab kev ua haujlwm zoo. Tom qab ntxiv HPMC, kev ua haujlwm ntawm cov tshuaj khib nyiab tau zoo dua qub, thiab cov dej tuav tau zoo dua qub, yog li cov mortar tseem tuaj yeem khaws cov dej noo txaus hauv qhov kub thiab txias, tsis txhob tawg lossis txo cov adhesion los ntawm kev ziab sai heev. Qhov no feature yog tshwj xeeb tshaj yog ib qho tseem ceeb rau lub sab nrauv phab ntsa rwb thaiv tsev, uas muaj peev xwm ho ncua lub sij hawm siv lub qhov rais thiab ua rau kev tsim kho kom yooj yim.
Nyob rau tib lub sijhawm, cov nyhuv lubricating ntawm HPMC kuj ua rau cov mortar yooj yim dua rau kev thov, txo cov kev siv zog thaum siv, thiab txhim kho kev tsim kho. Tsis tas li ntawd, HPMC tuaj yeem txhim kho cov cuab yeej tiv thaiv sagging ntawm mortar, muaj kev ruaj ntseg zoo txawm tias nyob rau hauv kev tsim kho, thiab tiv thaiv mortar los ntawm slipping los yog tev.
2. Txhim khu kev ruaj khov ntawm cov khoom siv hauv tsev
Daim ntawv thov ntawm HPMC hauv cov khoom siv hauv tsev tsis tsuas yog txhim kho kev ua haujlwm ntawm kev tsim kho theem, tab sis kuj tseem muaj kev cuam tshuam tseem ceeb rau lub sijhawm ntev ntawm lub tsev. Kev tuav dej ntawm HPMC tuaj yeem ua kom cov khoom sib zog sib npaug thaum lub sijhawm ziab, tsis txhob muaj kev ntxhov siab thiab tawg, uas yog qhov tseem ceeb tshwj xeeb rau cov khoom siv cement. Kev tawg yog ib qho ntawm cov laj thawj tseem ceeb ntawm kev puas tsuaj rau lub tsev thaum ntxov, thiab HPMC tuaj yeem ua rau cov txheej txheem no qeeb thiab ua kom lub neej kev pab cuam ntawm cov vaj tse.
Hauv cov nplais nplaum, lub luag haujlwm ntawm HPMC yog qhov tshwj xeeb. Nws cov khoom sib txuas zoo ua kom ntseeg tau tias cov vuas tuaj yeem ua kom ruaj khov rau ntawm lub hauv paus nto thiab tuaj yeem tiv taus cov dej vapor yaig mus ntev, txo qhov kev pheej hmoo ntawm cov pobzeb ntog. Tsis tas li ntawd, HPMC tuaj yeem txhim kho qhov kev ua tau zoo ntawm cov dej khib nyiab thiab txhim kho nws lub peev xwm los tiv thaiv cov dej nkag, yog li ua kom muaj txiaj ntsig zoo rau lub neej tsis muaj dej ntawm cov tsev.
3. Txhim kho ib puag ncig kev ua haujlwm
Nrog rau thoob ntiaj teb kev mloog zoo rau tej teeb meem ib puag ncig, kev tsim kho kev lag luam tseem tab tom nrhiav ntsuab thiab ib puag ncig cov ntaub ntawv thiab thev naus laus zis. Raws li cov khoom tsis muaj tshuaj lom thiab biodegradable, HPMC ua tau raws li kev tsim kho kev lag luam qhov kev thov rau cov ntaub ntawv ib puag ncig. Piv nrog rau cov tshuaj siv tshuaj ib txwm siv, HPMC tsis tsuas yog tsis tsim cov tshuaj phem thaum tsim khoom thiab siv, tab sis kuj tuaj yeem txo qhov tsis zoo ntawm cov organic compound (VOC) cov ntsiab lus hauv cov khoom siv hauv tsev thiab txo cov pa phem rau huab cua thiab ib puag ncig.
Tsis tas li ntawd, HPMC tuaj yeem txhim kho kev ua haujlwm ntawm cov khoom siv hauv tsev, yog li txo cov khoom siv. Piv txwv li, hauv gypsum-raws li cov ntaub ntawv hauv tsev, qhov sib ntxiv ntawm HPMC tuaj yeem txo cov cement thiab gypsum, txo cov peev txheej hauv kev tsim kho, thiab txo cov khoom siv pov tseg. Qhov no tsis yog tsuas yog pab txo cov nqi tsim kho, tab sis kuj txo qis kev vam khom ntawm cov peev txheej ntuj thiab txhawb kev tsim kho kev lag luam kom txhim kho kev lag luam kom ruaj khov.
4. Txhim kho qhov ntau yam ntawm cov khoom siv hauv tsev
Kev siv dav ntawm HPMC tau muab cov khoom siv hauv tsev ib txwm ua haujlwm ntau dua. Piv txwv li, nyob rau hauv tus kheej-leveling cov ntaub ntawv hauv pem teb, HPMC ua rau hauv pem teb paving smoother thiab zoo ib yam los ntawm kev txhim kho cov fluidity thiab dej tuav ntawm cov khoom. Cov thev naus laus zis no tsis yog tsuas yog txhim kho kev zoo nkauj thiab ua haujlwm ntev ntawm hauv pem teb, tab sis kuj ua rau lub sijhawm siv sijhawm luv, ua tau raws li cov kev xav tau ntawm cov tsev niaj hnub rau kev tsim kho sai.
HPMC kuj tseem ua lub luag haujlwm tseem ceeb hauv kev lag luam txheej txheej. Nws zoo heev thickening kev ua tau zoo thiab uniform dispersibility pab kom cov txheej txheem kom cov tuab tuab thaum lub sij hawm tha xim txheej txheem, tiv thaiv sagging thiab stratification, thiab txhim kho lub txheej txheej muaj peev xwm thiab zoo nkauj nyhuv. Nyob rau tib lub sijhawm, kev ruaj ntseg ntawm HPMC kuj ua rau nws nyuaj rau cov txheej txheej kom sib cais thiab nag lossis daus thaum lub sijhawm khaws cia, ncua lub txee lub neej ntawm cov txheej thiab txo cov khoom poob ntawm qhov kev tsim kho.
5. Txhawb kev tsim kho tshiab hauv kev tsim kho tshuab
Kev taw qhia ntawm HPMC tsis tsuas yog txhim kho kev ua tau zoo ntawm cov khoom siv hauv tsev, tab sis kuj txhawb kev yug me nyuam ntawm kev tsim kho tshiab. Piv txwv li, nyob rau hauv premixed mortar thiab qhuav-mixed mortar, HPMC yog ib qho indispensable additive. Kev sib xyaw ntawm cov tshuaj khib nyiab yuav tsum tau siv sijhawm ntau thiab cov neeg ua haujlwm, thaum cov mortar premixed tuaj yeem sib tov sib npaug hauv lub Hoobkas ua ntej thiab ncaj qha thauj mus rau qhov chaw tsim khoom siv. Qhov no tsis tsuas yog txhim kho kev ua tau zoo ntawm kev tsim kho, tab sis kuj zam cov teeb meem zoo tshwm sim los ntawm kev sib xyaw ntawm qhov tsis sib xws.
Daim ntawv thov ntawm HPMC nyob rau hauv cov ntaub ntawv sib sib zog nqus plastering thiab suab rwb thaiv tsev thiab cov ntaub ntawv rwb thaiv tsev kub kuj nce. Cov ntaub ntawv no tuaj yeem tsis tsuas yog txo qhov hnyav ntawm lub tsev, tab sis kuj tseem txhim kho kev nplij siab ntawm sab hauv, ua tau raws li cov kev xav tau ntawm cov tsev niaj hnub rau kev txuag hluav taws xob, kev tiv thaiv ib puag ncig thiab lub neej zoo.
Raws li cov khoom siv polymer ntau, HPMC tau hloov pauv tag nrho cov kev lag luam kev tsim kho los ntawm kev txhim kho cov khoom siv hauv tsev, txhim kho cov txheej txheem tsim kho, ncua kev pab cuam lub neej ntawm cov tuam tsev thiab txhawb kev tsim cov vaj tsev zoo nkauj. Nrog rau kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis tsis tu ncua, daim ntawv thov kev lag luam ntawm HPMC yuav nthuav dav ntxiv, thiab kev tsim kho kev lag luam tseem yuav txhim kho kom muaj txiaj ntsig zoo dua, ib puag ncig tus phooj ywg thiab kev txawj ntse.
Post lub sij hawm: Sep-12-2024