Hydroxypropyl methylcellulose (HPMC) yog ib qho uas tsis yog-ionic cellulose ether ua los ntawm ntuj polymer khoom cellulose los ntawm ntau cov txheej txheem tshuaj. Hydroxypropylmethylcellulose (HPMC) yog ib qho tsis muaj ntxhiab, tsis qab, tsis muaj tshuaj lom cov hmoov dawb uas tuaj yeem yaj hauv dej txias los tsim cov kua nplaum pob tshab. Nws muaj cov yam ntxwv ntawm thickening, khi, dispersing, emulsifying, zaj duab xis-forming, suspending, adsorbing, gelling, nto active, tswj cov dej noo thiab tiv thaiv colloid.
HPMC yog dav siv nyob rau hauv cov khoom siv, coatings, hluavtaws resins, ceramics, tshuaj, khoom noj khoom haus, textiles, ua liaj ua teb, tshuaj pleev ib ce, luam yeeb thiab lwm yam lag luam. HPMC tuaj yeem muab faib ua qib kev tsim kho, qib zaub mov thiab qib tshuaj raws li lub hom phiaj. Tam sim no, feem ntau ntawm cov khoom siv hauv tsev yog qib kev tsim kho. Nyob rau hauv kev tsim kho qib, putty hmoov yog siv ntau npaum li cas, li 90% yog siv rau putty hmoov, thiab tus so yog siv rau cement mortar thiab kua nplaum.
Cellulose ether yog non-ionic semi-synthetic siab molecular polymer, uas yog dej-soluble thiab hnyav-soluble.
Cov teebmeem tshwm sim los ntawm kev lag luam txawv txawv. Piv txwv li, hauv cov khoom siv tshuaj lom neeg, nws muaj cov teebmeem hauv qab no:
① Dej tuav tus neeg saib xyuas, ②Thickener, ③Leveling khoom, ④Film forming property, ⑤Binder
Hauv kev lag luam polyvinyl chloride, nws yog emulsifier thiab dispersant; nyob rau hauv kev lag luam kws tshuaj, nws yog ib tug binder thiab ib tug qeeb thiab tswj cov ntaub ntawv tso tawm lub moj khaum, thiab lwm yam. Vim hais tias cellulose muaj ib tug ntau yam ntawm composite cov teebmeem, nws daim ntawv thov ntawm lub teb kuj yog feem ntau nws kim heev. Tom ntej no, kuv yuav tsom mus rau kev siv thiab kev ua haujlwm ntawm cellulose ether hauv ntau yam khoom siv hauv tsev.
Daim ntawv thov in phab ntsaputty
Hauv cov hmoov putty, HPMC plays peb lub luag hauj lwm ntawm thickening, dej tuav thiab kev tsim kho.
Thickening: Cellulose tuaj yeem ua kom tuab kom tshem tawm thiab ua kom cov tshuaj sib txawv nce thiab nqis, thiab tiv thaiv sagging.
Kev tsim kho: Cellulose muaj cov nyhuv lubricating, uas tuaj yeem ua rau cov hmoov putty muaj kev tsim kho zoo.
Daim ntawv thov nyob rau hauv qhob mortar
Lub mortar npaj tsis ntxiv cov dej tuav cov thickener muaj lub zog compressive siab, tab sis cov khoom tsis zoo ntawm cov dej tuav, cohesiveness, softness, los ntshav loj, kev ua haujlwm tsis zoo, thiab qhov pib siv tsis tau. Yog li ntawd, cov dej-retaining thickening cov ntaub ntawv yog ib qho tseem ceeb ntawm cov khoom npaj sib xyaw mortar. Nyob rau hauv mortar pob zeb, hydroxypropyl methyl cellulose yog feem ntau xaiv, thiab cov dej tuav tus nqi yuav nce mus rau ntau tshaj 85%. Txoj kev siv hauv mortar pob zeb yog ntxiv dej tom qab cov hmoov qhuav sib tov sib xyaw. Kev tuav dej siab tuaj yeem ua kom cov cement tag nrho. Ua kom muaj zog ntawm daim ntawv cog lus tseem ceeb. Nyob rau tib lub sijhawm, tensile thiab shear lub zog tuaj yeem txhim kho kom tsim nyog. Txhim kho kev tsim kho zoo heev thiab txhim kho kev ua haujlwm zoo.
Daim ntawv thov nyob rau hauv pobzeb nplaum
1. Hydroxypropyl methylcellulose pobzeb nplaum tshwj xeeb yog siv los txuag qhov xav tau ua ntej-soak cov vuas hauv dej
2. Txheem muab tshuaj txhuam thiab muaj zog
3. Lub thickness ntawm paste yog 2-5 hli, txuag cov ntaub ntawv thiab qhov chaw, thiab ua kom qhov chaw kho kom zoo nkauj
4. Kev tshaj tawm kev xav tau rau cov neeg ua haujlwm tsis siab
5. Tsis tas yuav kho nws nrog cross yas clips txhua, qhov muab tshuaj txhuam yuav tsis poob, thiab qhov adhesion yog ruaj.
6. Yuav tsis muaj ntau tshaj slurry nyob rau hauv lub cib pob qij txha, uas yuav zam tau cov pa phem ntawm lub cib nto.
7. Ntau daim ntawm cov nplais pobzeb tuaj yeem muab tso ua ke, tsis zoo li ib qho ntawm cov khoom siv cement mortar.
8. Kev tsim kho nrawm nrawm, kwv yees li 5 npaug sai dua li cov cement mortar xo, txuag lub sijhawm thiab txhim kho kev ua haujlwm.
Kev siv rau hauv tus neeg sawv cev caulking
Qhov sib ntxiv ntawm cellulose ether ua rau nws muaj qhov zoo ntawm adhesion, tsis tshua muaj shrinkage thiab siab abrasion tsis kam, uas tiv thaiv cov khoom siv los ntawm kev puas tsuaj thiab tsis txhob cuam tshuam cov dej nkag mus rau tag nrho lub tsev.
Daim ntawv thov nyob rau hauv tus kheej-leveling cov ntaub ntawv
Tiv thaiv los ntshav:
Ua lub luag haujlwm zoo hauv kev ncua, tiv thaiv slurry deposition thiab los ntshav;
Ua kom muaj kev txav mus los thiab:
Cov khoom tsis tshua muaj viscosity tsis cuam tshuam qhov ntws ntawm slurry thiab yooj yim ua haujlwm nrog. Nws muaj qee yam dej tuav thiab tuaj yeem tsim cov nyhuv zoo tom qab nws tus kheej-leveling kom tsis txhob tawg.
Daim ntawv thov ntawm sab nrauv phab ntsa rwb thaiv tsev mortar
Hauv cov khoom siv no, cellulose ether feem ntau ua lub luag haujlwm ntawm kev sib txuas thiab ua kom lub zog, ua rau cov tshuaj khib nyiab yooj yim dua thiab txhim kho kev ua haujlwm. Nyob rau tib lub sijhawm, nws muaj peev xwm tiv taus dai. Crack kuj, txhim kho nto zoo, ua kom muaj zog daim ntawv cog lus.
Qhov sib ntxiv ntawm hydroxypropyl methylcellulose kuj muaj qhov ua rau qeeb qeeb ntawm cov tshuaj khib nyiab. Nrog rau qhov nce ntawm HPMC, lub sijhawm teem sijhawm ntawm lub mortar yog txuas ntxiv, thiab tus nqi ntawm HPMC kuj nce ntxiv raws li. Lub sijhawm teeb tsa ntawm lub mortar tsim nyob rau hauv dej yog ntev tshaj li qhov tsim nyob rau hauv cov huab cua. Qhov no feature yog qhov zoo rau kev siv cov pob zeb hauv qab dej. Cov cement mortar tshiab sib xyaw nrog hydroxypropyl methylcellulose muaj cov khoom sib txuas zoo thiab yuav luag tsis muaj dej seepage
Daim ntawv thov nyob rau hauv gypsum mortar
1. Txhim kho qhov sib kis ntawm gypsum puag: Muab piv nrog cov hydroxypropyl methylcellulose ether zoo sib xws, qhov sib kis tau nce ntau.
2. Daim ntawv thov teb thiab ntau npaum li cas: lub teeb hauv qab plastering gypsum, qhov pom zoo npaum li cas yog 2.5-3.5 kg / tuj.
3. Kev ua tau zoo los tiv thaiv sagging: tsis muaj sag thaum ib qho kev tsim kho yog siv rau hauv cov khaubncaws sab nraud povtseg, tsis muaj sag thaum thov rau ntau tshaj ob qhov kev hla (ntau tshaj 3cm), zoo heev plasticity.
4. Zoo heev constructability: yooj yim thiab du thaum dai, tuaj yeem molded ib zaug, thiab muaj plasticity.
5. Cov dej tuav tau zoo: ncua lub sijhawm ua haujlwm ntawm gypsum puag, txhim kho huab cua tsis kam ntawm gypsum puag, ua kom lub zog sib txuas ntawm gypsum puag thiab txheej txheej, kev ua haujlwm ntub dej zoo heev, thiab txo cov av tshauv.
6. Strong compatibility: Nws yog haum rau txhua yam ntawm gypsum puag, txo lub sij hawm sinking ntawm gypsum, txo qhov qhuav shrinkage tus nqi, thiab phab ntsa nto tsis yooj yim rau hollow thiab tawg.
Kev siv tus neeg saib xyuas interface
Hydroxypropylmethylcellulose (HPMC) thiab hydroxyethylmethylcellulose (HEMC) yog cov khoom siv hauv tsev,
Thaum siv los ua tus neeg sawv cev cuam tshuam rau sab hauv thiab sab nrauv phab ntsa, nws muaj cov yam ntxwv hauv qab no:
- Yooj yim sib tov yam tsis muaj pob:
Los ntawm kev sib xyaw nrog dej, kev sib txhuam thaum lub sij hawm ziab yog txo qis, ua kom sib tov yooj yim thiab txuag lub sij hawm sib tov;
- Kev tuav dej zoo:
Qhov tseem ceeb txo cov dej noo absorbed los ntawm phab ntsa. Kev tuav dej zoo tuaj yeem ua kom lub sijhawm npaj ntev ntawm cov cement, thiab ntawm qhov tod tes, nws tseem tuaj yeem xyuas kom cov neeg ua haujlwm tuaj yeem khawb cov phab ntsa putty ntau zaus;
- Ua haujlwm zoo stability:
Kev tuav dej zoo nyob rau hauv qhov kub thiab txias, haum rau kev ua haujlwm nyob rau hauv lub caij ntuj sov los yog kub.
- Kev xav tau dej ntau ntxiv:
Qhov tseem ceeb nce cov dej thov ntawm cov ntaub ntawv putty. Nws nce lub sij hawm kev pab cuam ntawm lub putty rau ntawm phab ntsa, ntawm qhov tod tes, nws muaj peev xwm ua rau kom cov txheej txheej ntawm putty thiab ua rau cov mis nyuj ntau yig.
Kev siv hauv gypsum
Tam sim no, feem ntau cov khoom siv gypsum yog plastering gypsum, bonded gypsum, inlaid gypsum, thiab pobzeb nplaum.
Gypsum plaster yog cov khoom siv zoo plastering rau sab hauv phab ntsa thiab qab nthab. Cov phab ntsa nto plastered nrog nws zoo thiab du, tsis plam hmoov, yog ruaj khov rau hauv paus, tsis muaj cracking thiab ntog tawm, thiab muaj ib tug fireproof muaj nuj nqi;
Adhesive gypsum yog ib hom tshiab ntawm cov nplaum rau lub tsev teeb pom kev zoo. Nws yog tsim los ntawm gypsum ua cov khoom siv hauv paus thiab ntau yam khoom ntxiv.
Nws yog tsim rau kev sib txuas ntawm ntau yam khoom siv hauv tsev inorganic. Nws muaj cov yam ntxwv ntawm tsis muaj tshuaj lom, tsis qab, muaj zog thaum ntxov thiab ceev ceev, thiab ruaj khov. Nws yog cov khoom txhawb nqa rau lub tsev boards thiab thaiv kev tsim kho;
Gypsum caulk yog qhov sib txawv nruab nrab ntawm gypsum boards thiab kho qhov muab tub lim rau phab ntsa thiab cov kab nrib pleb.
Cov khoom gypsum no muaj ntau txoj haujlwm sib txawv. Ntxiv nrog rau lub luag haujlwm ntawm gypsum thiab lwm yam khoom ntim, qhov teeb meem tseem ceeb yog qhov ntxiv cellulose ether additives ua lub luag haujlwm tseem ceeb. Vim hais tias gypsum muab faib ua anhydrous gypsum thiab hemihydrate gypsum, sib txawv gypsum muaj qhov sib txawv ntawm kev ua haujlwm ntawm cov khoom, yog li thickening, dej tuav thiab retardation txiav txim siab qhov zoo ntawm gypsum tsev cov ntaub ntawv. Qhov teeb meem tshwm sim ntawm cov ntaub ntawv no yog hollowing thiab cracking, thiab thawj lub zog tsis tuaj yeem ncav cuag. Yuav kom daws tau qhov teeb meem no, nws yog xaiv hom cellulose thiab cov khoom siv sib xyaw ua ke ntawm cov retarder. Hauv qhov no, methyl lossis hydroxypropyl methyl 30000 feem ntau xaiv. -60000cps, tus nqi ntxiv yog nyob nruab nrab ntawm 1.5‰-2‰, cellulose yog siv los tuav dej thiab retarding lubrication.
Txawm li cas los xij, nws tsis tuaj yeem cia siab rau cellulose ether ua ib qho retarder, thiab nws yog ib qho tsim nyog yuav tsum tau ntxiv citric acid retarder los sib tov thiab siv yam tsis muaj kev cuam tshuam rau thawj lub zog.
Kev tuav dej feem ntau yog hais txog qhov dej ntau npaum li cas yuav ploj mus yam tsis muaj dej nqus dej sab nraud. Yog tias cov phab ntsa qhuav dhau lawm, kev nqus dej thiab cov evaporation ntawm lub hauv paus yuav ua rau cov khoom poob dej sai heev, thiab hollowing thiab cracking yuav tshwm sim.
Txoj kev siv no yog tov nrog cov hmoov qhuav. Yog tias koj npaj ib qho kev daws teeb meem, thov xa mus rau txoj kev npaj ntawm cov tshuaj.
Daim ntawv thov hauv latex xim
Hauv kev lag luam latex xim, yuav tsum xaiv hydroxyethyl cellulose. Cov lus qhia dav dav ntawm nruab nrab viscosity yog 30000-50000cps, uas sib haum rau cov lus qhia ntawm HBR250. Kev siv ntau npaum li cas feem ntau yog 1.5‰-2‰. Lub luag haujlwm tseem ceeb ntawm hydroxyethyl hauv cov xim latex yog ua kom tuab, tiv thaiv cov gelation ntawm cov xim, pab kev tawg ntawm cov xim, kev ruaj ntseg ntawm cov latex, thiab ua rau kom cov viscosity ntawm cov khoom, uas yuav pab tau rau theem kev ua tau zoo ntawm kev tsim kho. .
Post lub sij hawm: Dec-13-2022