Hydroxypropyl Methyl Cellulose (HPMC) Piav Qhia: Nws Yog Dab Tsi, Cov Lus Qhia Txhais Li Cas, thiab Yuav Xaiv Li Cas
Qhuav- sib tov mortar, putty, pobzeb nplaum, gypsum ... yog tias koj ua haujlwm hauv cov khoom siv, HPMC nyuaj rau zam. Nws lub npe tag nrho yog hydroxypropyl methyl cellulose. Hauv kev lag luam, txhua tus tsuas yog hais tias HPMC - qee tus neeg hu nws "cellulose" lossis "cov kua nplaum nplaum."
Cov ncej no hla lub fluff. Nws npog cov khoom uas tsis meej pem cov neeg tuaj tshiab: nws yog dab tsi, yuav ua li cas nyeem cov ntawv spec, qhov twg nws tau siv hauv kev tsim kho, thiab yuav ua li cas los xyuas ib pawg ua ntej koj yuav.
HPMC
Nws yog dab tsi, thiab qhov twg los ntawm
HPMC yog ibcellulose ether. Cov khoom siv raw yog ntuj cellulose - refined paj rwb linters lossis ntoo pulp. Nws tau kho nrog alkali, ces etherified los txuas methoxy thiab hydroxypropoxy pawg, ces ntxuav, qhuav thiab milled rau hauv cov hmoov dawb. Cov pob txha caj qaum los ntawm cov cellulose ntuj, tsis yog roj av-raws li polymers, thiab nws yog biodegradable. Qhov no kuj yog vim li cas nws tau tso cai hauv cov khoom noj thiab tshuaj.
Muaj ib qho kev nthuav dav ntau lawm uas txiav txim siab seb koj yuav siv nws li cas: seb nws yog qhov chaw- kho.
Cov qib uas tsis kho tau clump rau hauv cov pob thaum lawv ntaus dej txias; Nto- kho qib - cov lag luam hu lawv tam sim lossis txias - dej tam sim - nqa glyoxal- raws li txheej ntawm txhua qhov khoom. Cov hmoov disperses tusyees nyob rau hauv dej ua ntej es tsis txhob sticking ua ke, thiab tsuas yog pib thickening tom qab ob peb feeb. Lub sij hawm dissolution poob los ntawm nees nkaum mus rau plaub caug feeb mus rau peb mus rau yim. Qhuav- sib tov cov nroj tsuag thiab nws tus kheej- cov khoom sib xyaw ua ke feem ntau siv cov qib tam sim no vim li no: nws nres cov hmoov los ntawm lub sijhawm sib tov thiab ntim khoom, thiab nres cov neeg ua haujlwm xaus nrog cov pob thaum lawv ntxiv dej rau ntawm qhov chaw.
Yog li nug ua ntej koj yuav -instant los yog qeeb -dissolve. Txoj kev uas koj yaj lawv yog txawv kiag li.
Cov lej ntawm daim ntawv spec txhais li cas
1.Viscosity.
Ntsuas hauv 2% daws ntawm 20 degree. Qib khiav ntawm ob peb puas mus txog 200,000 mPa·s. Cov ntaub ntawv tsim kho feem ntau siv 40,000, 75,000, 100,000 lossis 200,000. Viscosity drives sib xws, dej tuav thiab sag kuj: qhov siab dua, qhov thicker lub paste thiab qhov tsawg nws slumps - tab sis nws nyuaj rau sib tov thiab qhib lub sij hawm hloov ib yam nkaus. Qhov feem ntau pib yuam kev yog xav tias siab dua yog ib txwm zoo dua. Nws tsis yog. Tshaj -spec viscosity ua rau kev sib xyaw ua haujlwm nyuaj thiab raug nqi ntau dua. Yuav txaus, tsis yog feem ntau.
2. Kev tuav dej.
Cement xav tau dej kom hydrate. Yog hais tias lub substrate nqus dej tawm sai heev, lub mortar nto dries tawm, plua plav, thiab tsis khi. Cov dej khib nyiab yog ntsuas ib JGJ / T 70-2009. Cov qib kev tsim kho zoo ntaus 88% lossis ntau dua; zoo batch khiav saum 90%. Thaum koj pom "kev tuav dej ntau dua lossis sib npaug li 88%" ntawm ib daim ntawv, qhov ntawd yog txoj kab hla, tsis yog qhov muag.
3.Gel kub.
HPMC kua gels - tig dawb thiab tuab - ib zaug nws tau rhuab mus rau qhov kub thiab txias. Gel point taug qab cov ntsiab lus methoxy thiab ntab ntawm kwv yees li 58 thiab 90℃nyob ntawm qib. Qhov nws tswj tau hauv kev coj ua yog qhov chaw ua haujlwm: nyob rau lub caij ntuj sov sov, qib qis dhau ntawm cov gel point mus "false-tick" nyob rau hauv lub thoob - zoo li txhav, ces muab teeb meem rau ntawm phab ntsa. Rough siv ntau yam: putty 58-64 degree, pobzeb nplaum 60-68 degree, plastering mortar 62-72 degree, tus kheej-leveling 65-75℃. Thaum koj xaiv, nws muaj kev nyab xeeb dua los khaws cov gel taw tes kom xis nyob saum qhov kub tshaj plaws uas koj yuav ua haujlwm.
4.Methoxy thiab hydroxypropoxy cov ntsiab lus.Ob tus lej no txiav txim siab solubility, hydrophilicity thiab gel point. Cov qib kev tsim kho feem ntau khiav 19-30% methoxy thiab 4-12% hydroxypropoxy, nyob ntawm qib. Koj tsis tas yuav cim lawv - tab sis lawv yuav tsum nyob hauv daim ntawv tshaj tawm. Thiab cov qib sib txawv raws li qhov sib txawv ntawm no, yog li tsis txhob sib piv A Hoobkas tus lej tawm tsam B lub Hoobkas thiab hu nws qhov teeb meem.Tus so - fineness, tshauv, noo noo - cuam tshuam kev sib kis ceev thiab batch-rau-batch sib xws. Tsim nyog kuaj, tab sis tsis yog lub hauv paus ntawm koj xaiv.
Qhov twg nws tau siv hauv kev tsim kho
·Pobzeb nplaum:
dej retention thiab sag resistance. Qhov tseem ceeb tshaj plaws rau loj - cov ntaub ntawv vuas thiab tuab - txaj ua haujlwm; Lub sijhawm qhib ntev txaus cia lub tiler ua haujlwm yam tsis muaj rushing.
·Putty:
muab tshuaj txhuam kom du, yooj yim trowel xav tias - tsawg lo rau cov hniav - thiab nws cuam tshuam rau sandability.
·Plastering thiab sprayed mortar:
dej tuav, lubrication, pumpability. Cov ntawv thov tshuaj tsuag xav kom khaws dej ntau dua.
· Tus kheej -leveling, grout, gypsum khoom:
txhua yam siv nws ib yam nkaus, tsuas yog nrog qhov sib txawv viscosity thiab gel kub yuav tsum tau ua.
Nws kuj tshwm sim hauv cov xim pleev xim, kev saib xyuas tus kheej, tshuaj thiab khoom noj, raws li cov thickener, zaj duab xis yav dhau los, tso tawm -tus neeg saib xyuas thiab stabilizer. Rau cov neeg hauv tsev cov ntaub ntawv, tau txais kev tsim kho sab xis npog feem ntau ntawm txoj haujlwm.
Daim ntawv thov
Yuav ua li cas kuaj ib batch ua ntej koj yuav
Tsis txhob cia li caum tus nqi pheej yig tshaj, thiab tsis txhob cia siab rau lub hom. Peb cov kauj ruam ua tau zoo:
1. Nug daim ntawv qhia thiab xyuas txhua kab:
viscosity, dej tuav, gel kub, tshauv, noo noo. Xyuas kom cov qib sib phim qhov koj tau xaj tiag tiag.
2. Sib tov ib qho qauv ntawm qhov chaw.
Saib sai npaum li cas nws disperses, muaj pes tsawg npuas, seb lumps form. Tom qab ib nrab teev, xyuas qhov tseeb thiab viscosity. Tom qab ntawd ua tau trowel ib thaj los yog nteg ib lub cib kom hnov qhov kev ua haujlwm, dej tuav thiab lub sijhawm qhib.
3. Saib batch sib xws.
Yog tias tib qib sib tw ntawm ob pawg, koj cov qauv yuav tsum tau kho. Qhov ntawd yog tus nqi zais ntau tshaj plaws thiab ua rau tag nrho.
Qhov tseeb tiag:tsis muaj universal HPMC.
Muab cov specs rau koj daim ntawv thov thiab koj yuav tsis mus deb lawm. Thaum koj tsis paub meej, ob peb sab - los ntawm - sab qauv kev sim ntaus txhua yam uas leej twg qhia koj.
