Kev lag luam kev tsim kho yog ib qho tseem ceeb uas npog ntau yam kev ua ub no los ntawm kev tsim cov tsev nyob mus rau kev tsim cov phiaj xwm loj. Hauv kev lag luam no, kev siv ntau yam khoom ntxiv thiab cov ntaub ntawv ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua tau zoo thiab kev ua tau zoo ntawm cov ntaub ntawv tsim kho. Hydroxypropyl methylcellulose (HPMC) yog ib qho khoom ntxiv tseem ceeb heev. HPMC yog ib qho khoom siv ntau yam uas muaj ntau daim ntawv thov hauv kev tsim kho vim nws cov yam ntxwv tshwj xeeb.
1. Cov yam ntxwv ntawm hydroxypropyl methylcellulose
Hydroxypropylmethylcellulose yog ib hom polymer semi-synthetic uas tau los ntawm cellulose. Nws yog tsim los ntawm kev hloov kho tshuaj ntawm cellulose, feem ntau yog los ntawm kev kho nws nrog propylene oxide thiab methyl chloride. Cov txheej txheem tsim cov tshuaj uas muaj cov yam ntxwv tshwj xeeb uas ua rau lawv zoo tagnrho rau ntau yam kev siv hauv kev tsim kho.
Kev Khaws Dej: Ib qho ntawm cov yam ntxwv tseem ceeb ntawm HPMC yog nws lub peev xwm khaws dej. Cov yam ntxwv no tseem ceeb heev rau cov ntaub ntawv siv hauv kev tsim kho xws li cov mortars, qhov twg kev khaws dej pab ua kom ntev dua qhov ua haujlwm ntawm cov khoom sib xyaw, ua rau kev tsim kho thiab kev ua tiav zoo dua.
Ua kom tuab: HPMC ua haujlwm ua tus neeg sawv cev tuab hauv cov qauv tsim. Los ntawm kev ua kom cov viscosity ntawm cov khoom, nws txhim kho nws qhov sib xws thiab ruaj khov, yog li txhim kho nws cov kev ua tau zoo thaum lub sijhawm thov.
Kev nplaum: HPMC txhim kho qhov kev nplaum ntawm cov ntaub ntawv tsim kho rau lub substrate, txhawb kev sib txuas zoo dua thiab txo qhov kev pheej hmoo ntawm kev tawg lossis delamination.
Kev Tsim Zaj Duab Xis: HPMC qhuav los ua ib zaj duab xis nyias nyias, yoog tau uas muab ib qho kev tiv thaiv rau ntawm qhov chaw. Cov yam ntxwv no yog qhov tshwj xeeb tshaj yog muaj txiaj ntsig zoo hauv kev pleev xim thiab xim kom txhim kho kev ruaj khov thiab kev tiv thaiv rau cov yam ntxwv ib puag ncig.
2. Kev siv hydroxypropyl methylcellulose hauv kev tsim kho
Qhov ua tau ntau yam ntawm HPMC ua rau nws siv tau ntau yam hauv kev lag luam kev tsim kho. Qee qhov kev siv tseem ceeb suav nrog:
Cov Nplaum Pobzeb thiab Cov Grouts: HPMC feem ntau siv rau hauv cov nplaum pobzeb thiab cov grouts kom txhim kho lawv txoj kev ua haujlwm, kev nplaum thiab cov yam ntxwv khaws dej. Nws pab tiv thaiv kev ntsws thiab tawg thaum txhim kho kev sib txuas ntawm cov pobzeb thiab cov khoom siv hauv pem teb.
Cov cement plasters thiab plasters: Hauv cov cement plasters thiab plasters, HPMC yog ib qho tseem ceeb additive los tswj qhov sib xws thiab txhim kho kev ua haujlwm. Nws ua rau daim ntawv thov du thiab txo qhov sagging lossis slumping ntawm cov khoom.
Cov tshuaj sib xyaw ua ke uas tswj tau tus kheej: HPMC feem ntau yog siv rau hauv cov tshuaj sib xyaw ua ke uas tswj tau tus kheej kom kho lawv cov yam ntxwv ntws thiab tiv thaiv kev sib cais ntawm cov pob zeb. Qhov no ua rau muaj qhov chaw du thiab tiaj tus uas haum rau kev teeb tsa pem teb tom qab.
Cov Txheej Txheem Rwb Thaiv Sab Nraud thiab Cov Txheej Txheem Ua Kom Tiav (EIFS): EIFS siv cov nplaum thiab cov txheej txheem ua los ntawm HPMC los lo cov vaj huam sib luag rwb thaiv tsev rau ntawm lub substrate thiab muab kev tiv thaiv tiav. HPMC ua rau lub cev EIFS ruaj khov thiab tiv taus huab cua, ua rau nws lub neej ua haujlwm ntev dua.
Cov khoom siv gypsum: HPMC siv rau hauv cov khoom siv gypsum xws li cov khoom sib koom ua ke thiab stucco los txhim kho kev ua haujlwm, kev nplaum thiab kev tawg. Nws kuj txhim kho qhov tiav ntawm qhov chaw thiab kev xuab zeb ntawm cov ntaub ntawv plaster.
3. Cov txiaj ntsig ntawm kev siv hydroxypropyl methylcellulose hauv kev tsim kho
Kev siv HPMC muab ntau yam txiaj ntsig rau cov kws tshaj lij kev tsim kho, suav nrog:
Kev ua haujlwm tau zoo dua: HPMC txhim kho kev ua haujlwm ntawm cov khoom siv hauv tsev, ua rau lawv yooj yim dua rau kev tuav, siv thiab ua tiav. Qhov no ua rau muaj kev tsim khoom ntau dua thiab txo cov nqi zog ua haujlwm.
Kev Ua Tau Zoo Dua: Cov khoom ntawm HPMC pab txhim kho cov yam ntxwv ntawm kev ua tau zoo xws li kev nplaum, kev khaws dej thiab kev ua haujlwm ntev, ua rau muaj txiaj ntsig zoo dua ntawm kev tsim kho.
Kev Sib Xws: HPMC sib xws nrog ntau yam khoom siv hauv kev tsim kho thiab cov khoom ntxiv, uas tso cai rau cov qauv sib txawv uas ua tau raws li cov kev xav tau tshwj xeeb ntawm cov haujlwm.
Kev Ruaj Ntseg Ib Puag Ncig: HPMC yog los ntawm cov khoom siv cellulose uas rov ua dua tshiab thiab yog biodegradable, ua rau nws yog ib qho kev xaiv ruaj khov rau ib puag ncig rau kev siv hauv kev tsim kho.
Kev Siv Nyiaj Zoo: Txawm hais tias tus nqi pib ntawm HPMC yuav siab dua piv rau cov khoom siv ntxiv ib txwm muaj, nws cov kev ua tau zoo thiab cov txiaj ntsig ntawm kev tsim khoom feem ntau ua pov thawj rau kev nqis peev hauv lub sijhawm ntev.
Hydroxypropyl methylcellulose ua lub luag haujlwm tseem ceeb hauv kev lag luam kev tsim kho, nrog nws cov khoom tshwj xeeb thiab cov txiaj ntsig pab txhim kho kev ua tau zoo, kev ruaj khov thiab kev ruaj khov ntawm cov ntaub ntawv tsim kho thiab cov txheej txheem. Los ntawm kev txhim kho kev ua haujlwm thiab kev nplaum mus rau kev txhim kho kev khaws cia dej thiab kev ruaj khov, HPMC tau dhau los ua cov khoom siv tseem ceeb hauv cov ntaub ntawv tsim kho. Ntau yam kev siv hauv kev tsim kho. Raws li kev lag luam kev tsim kho txuas ntxiv mus, kev thov rau HPMC yuav loj hlob, tsav los ntawm qhov xav tau kev ua haujlwm siab, kev daws teeb meem ruaj khov. Yog li ntawd, kev tshawb fawb ntxiv thiab kev tsim kho tshiab hauv kev txhim kho thiab daim ntawv thov ntawm HPMC yog qhov tsim nyog los ua kom tau raws li qhov xav tau hloov pauv ntawm kev lag luam kev tsim kho.
Lub sijhawm tshaj tawm: Lub Ob Hlis-26-2024