Hydroxypropyl methylcellulose (HPMC) yog cov khoom siv ntau yam polymer uas tau siv dav hauv kev tsim kho kev lag luam vim nws cov khoom tshwj xeeb thiab kev ua haujlwm. Lub compound yog muab los ntawm cellulose thiab hloov kho los ntawm kev ntxiv hydroxypropyl thiab methyl pawg. HPMC yog li nthuav tawm ntau yam khoom uas ua rau nws zoo haum rau ntau yam kev siv hauv kev tsim kho.
Water Retention thiab thickening zog:
Ib qho ntawm cov haujlwm tseem ceeb ntawm HPMC hauv kev tsim kho yog nws lub peev xwm los ua tus neeg saib xyuas dej. Qhov no yog qhov tseem ceeb rau cov khoom siv cement, vim tias kev tswj xyuas cov dej kom zoo yog qhov tseem ceeb rau kev hydration thiab kho kom zoo. HPMC pab tiv thaiv cov evaporation sai ntawm cov dej, kom ntseeg tau tias cov cement sib xyaw tseem ua haujlwm tau ntev dua.
HPMC kuj tseem siv tau los ua cov thickener los ua kom cov viscosity ntawm cov khoom siv hauv tsev. Qhov no yog qhov tshwj xeeb tshaj yog muaj txiaj ntsig hauv daim ntawv thov xws li cov nplais nplaum thiab cov khoom sib txuas sib txuas, uas yuav tsum tau muaj cov tuab tuab rau kev siv zoo dua thiab kev sib txuas.
Txhim kho machinability:
HPMC pab txhim kho kev ua haujlwm ntawm mortar thiab pob zeb sib tov. Los ntawm kev tswj cov dej ntsiab lus thiab txhim kho cov khoom rheological, cov ntaub ntawv no tuaj yeem siv tau thiab siv tau yooj yim dua. Qhov no yog qhov tseem ceeb tshwj xeeb thaum lub sij hawm tsim kho xws li plastering, rendering thiab masonry ua hauj lwm.
Txhim kho qhov adhesion ntawm pobzeb nplaum:
Hauv cov nplais nplaum, HPMC txhim kho adhesion los ntawm kev muab cov viscosity zoo ib yam. Qhov no ua kom cov vuas ua kom ruaj khov rau lub substrate, tiv thaiv cov teeb meem xws li debonding lossis tev tawm lub sijhawm. Kev tswj dej tuav cov khoom ntawm HPMC kuj tseem ua lub luag haujlwm tseem ceeb hauv kev ua kom pom qhov adhesion.
Crack kuj thiab txhim kho durability:
Ntxiv HPMC rau cov cement-based formulations tuaj yeem pab txo qis qhov tawg. Qhov no tshwj xeeb tshaj yog muaj txiaj ntsig zoo rau cov ntawv thov xws li pob zeb, qhov uas txo cov kab nrib pleb yog qhov tseem ceeb rau cov qauv kev ncaj ncees thiab ua haujlwm ntev ntawm cov khoom tiav. HPMC pab tswj kev ncaj ncees ntawm cov khoom thaum nws kho thiab muaj hnub nyoog.
Self-leveling compounds:
HPMC feem ntau yog siv rau hauv tus kheej-leveling compounds los tsim ib tug du, tiaj tus nto nyob rau hauv daim ntaub ntawv flooring. Cov dej tuav cov khoom ntawm HPMC ua lub luag haujlwm tseem ceeb hauv kev tswj lub sijhawm ziab ntawm cov khoom sib xyaw no, tso cai rau kev txhim kho tus kheej kom zoo yam tsis muaj teeb meem ntxov ntxov.
Cov khoom siv gypsum:
HPMC yog ib qho tseem ceeb additive nyob rau hauv gypsum khoom xws li gypsum. Nws txhim kho kev ua haujlwm ntawm stucco, txhim kho adhesion rau saum npoo, thiab pab ua kom tiav qhov zoo sib xws thiab ua tiav. Lub peev xwm tuav dej ntawm HPMC yog qhov zoo tshwj xeeb hauv kev siv gypsum.
Sab nrauv Insulation thiab Finishing Systems (EIFS):
EIFS yog qhov nrov cladding system nyob rau hauv cov tsev, muab thermal rwb thaiv tsev thiab ib tug zoo nkauj tiav. HPMC yog siv hauv EIFS formulations los txhim kho cov nplaum nplaum ntawm cov primer thiab xyuas kom muaj kev sib raug zoo ntawm cov rwb thaiv tsev thiab cov substrate.
Rwb thaiv tsev mortar:
HPMC yog ib qho tseem ceeb ntawm thermal rwb thaiv tsev mortar. Cov mortars no yog siv rau hauv kev tsim kho ntawm lub zog-npaum vaj tse los txhim kho thermal rwb thaiv tsev. HPMC pab tswj kom muaj qhov sib xws kom cov mortars tuaj yeem siv tau zoo rau ntau qhov chaw.
Tswj kev tso tawm ntawm additives:
HPMC tuaj yeem siv los encapsulate thiab tswj kev tso tawm ntau yam khoom siv hauv tsev. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog thaum maj mam tso cov tshuaj xws li biocides lossis corrosion inhibitors yuav tsum ua kom tiav kev ua haujlwm ntev thiab kev tiv thaiv cov khoom siv hauv tsev.
Emulsion stability:
Hauv kev tsim kho kev siv emulsions, xws li asphalt emulsions, HPMC ua tus stabilizer. Nws pab tiv thaiv dej thiab bitumen los ntawm kev sib cais, ua kom muaj kev ruaj ntseg thiab sib xws ntawm emulsion.
Compatibility nrog lwm yam additives:
HPMC yog sib xws nrog ntau yam ntawm lwm yam khoom siv ntxiv. Qhov kev ua tau zoo no tso cai rau cov neeg tsim qauv los kho qhov kev ua tau zoo ntawm cov khoom siv hauv tsev rau cov kev xav tau tshwj xeeb, txawm tias kho lub sijhawm, txhim kho adhesion lossis txhim kho tag nrho cov khoom siv.
Kev ua vaj tsev ntsuab:
HPMC feem ntau pom zoo rau kev coj ua vaj tsev ntsuab vim nws cov biodegradability thiab tsis tshua muaj kev cuam tshuam ib puag ncig. Nws siv ua raws li cov hauv paus ntsiab lus ntawm kev tsim kho kom ruaj khov, ua rau nws muaj kev xaiv zoo rau ib puag ncig tus phooj ywg tej yaam num.
Joint Compound thiab Texture Txheej:
Hauv kev sib koom ua ke thiab kev ntxhib los mos coatings, HPMC txhim kho kev ua tau zoo tag nrho los ntawm kev muab qhov tsim nyog rheology, daim ntawv thov yooj yim thiab xuab zeb. Nws tseem ua lub luag haujlwm hauv kev txhim kho cov adhesion ntawm cov ntaub ntawv no rau qhov chaw.
Caulks thiab sealants:
Hauv kev tsim cov caulks thiab sealants, HPMC pab ua tiav qhov xav tau sib xws thiab extrudability. Nws pab txhim kho tag nrho cov kev ua tau zoo ntawm cov khoom no los ntawm kev ua kom zoo adhesion thiab yoog raws lub sijhawm.
Txo sagging nyob rau hauv ntsug daim ntaub ntawv:
Rau kev siv ntsug xws li txheej thiab xim, HPMC pab tiv thaiv sag los ntawm imparting thixotropic zog. Qhov no yog qhov tseem ceeb rau kev tswj xyuas qhov sib txawv ntawm qhov chaw ntsug yam tsis muaj cov khoom tawg lossis ntws.
Hauv kev xaus, hydroxypropyl methylcellulose plays lub luag haujlwm tseem ceeb hauv kev tsim kho kev lag luam, muab ntau qhov zoo ntawm cov dej tuav, kev ua haujlwm, adhesion thiab durability. Nws daim ntawv thov ntau yam nyob rau hauv ntau yam khoom siv hauv tsev ua rau nws yog ib qho khoom siv tseem ceeb kom ua tiav cov khoom xav tau ntawm cov khoom kawg. Raws li kev tsim kho txuas ntxiv mus, HPMC zoo li yuav dhau los ua qhov tseem ceeb hauv kev txhim kho kev ua tau zoo thiab kev ruaj khov ntawm cov khoom siv hauv tsev.
Post lub sij hawm: Dec-18-2023