HPMC (Hydroxypropylmethylcellulose) yog ib qho cellulose derivative feem ntau siv hauv cov khoom siv, tshwj xeeb tshaj yog cov cement lossis gypsum raws li plasters thiab plasters. Nws yog multifunctional additive uas txhim khu kev ua tau zoo ntawm cov ntaub ntawv no thiab txhim kho lawv cov khoom. HPMC yog cov dej-soluble polymer uas tuaj yeem yooj yim tawg hauv dej los tsim cov kua dej tuab, homogeneous.
Hauv tsab xov xwm no, peb tshawb txog ntau yam txiaj ntsig ntawm kev siv HPMC hauv cov cement lossis gypsum raws li plasters thiab plasters.
Txhim kho kev ua haujlwm
Ib qho txiaj ntsig tseem ceeb ntawm kev siv HPMC hauv cov cement lossis gypsum raws li plasters thiab plasters yog nws cov kev ua haujlwm tau zoo. Kev ua tau zoo yog hais txog qhov yooj yim uas cov khoom siv tuaj yeem sib xyaw, siv thiab ua tiav. HPMC ua cov roj nplua nyeem, txhim kho cov dej ntws thiab kev sib kis ntawm cov khoom, ua kom yooj yim rau kev thov thiab ua kom tiav.
Lub xub ntiag ntawm HPMC nyob rau hauv qhov sib tov kuj txo cov khoom siv dej, uas pab tswj kev shrinkage thiab tawg thaum ziab. Qhov no txhais tau tias cov khoom yuav khaws nws cov duab thiab loj thiab yuav tsis tawg los yog shrinkage vim tsis ya raws.
Txhim kho adhesion
HPMC tseem tuaj yeem txhim kho qhov adhesion thiab rendering ntawm cement lossis gypsum raws li plasters rau hauv qab. Qhov no yog vim hais tias HPMC tsim ib zaj duab xis nyias nyob rau saum npoo ntawm lub substrate uas ua raws li cov dej noo barrier thiab tiv thaiv lub plaster los ntawm tev los yog sib cais los ntawm substrate.
Cov yeeb yaj kiab tsim los ntawm HPMC kuj tseem txhim kho cov ntawv cog lus ntawm plaster rau lub substrate los ntawm kev tsim lub foob kaw ntom nti ntawm ob. Qhov no ua rau tag nrho lub zog thiab durability ntawm plaster, ua rau nws tsis tshua muaj kev tawg los yog crumble.
Txhim kho huab cua tsis kam
Cov cement los yog gypsum raws li plasters thiab plasters uas muaj HPMC yog ntau resistant rau huab cua thiab yaig. Qhov no yog vim HPMC tsim cov yeeb yaj kiab tiv thaiv rau saum npoo ntawm plaster uas tiv thaiv dej thiab tiv thaiv kom tsis txhob ya raws nkag mus rau hauv cov khoom.
Cov yeeb yaj kiab tsim los ntawm HPMC kuj ua rau cov gypsum tiv taus ntau dua rau UV hluav taws xob thiab lwm yam huab cua, tiv thaiv nws los ntawm kev puas tsuaj los ntawm lub hnub, cua, nag thiab lwm yam ib puag ncig.
Nce durability
Ntxiv HPMC rau cement los yog gypsum raws li plasters thiab plasters txhim kho lawv tag nrho cov kav ntev. Qhov no yog vim HPMC nce qhov yooj thiab elasticity ntawm plaster, ua rau nws tsis tshua muaj kev tawg lossis tawg. HPMC kuj nce qhov hnav thiab cuam tshuam ntawm cov khoom, ua rau nws tiv taus ntau dua.
Qhov ua tau zoo ntawm cov khoom siv kuj ua rau nws tiv taus dej ntau dua xws li dej nkag, ntub dej thiab pwm loj hlob. Qhov no ua rau nws yog ib qho khoom siv zoo tshaj plaws rau kev siv hauv qhov chaw ntub dej xws li chav dej, chav ua noj thiab hauv qab daus.
Txhim kho qhov hluav taws kub
Cement-los yog gypsum-based plasters thiab plasters uas muaj HPMC yog cov refractory ntau dua li cov tsis muaj HPMC. Qhov no yog vim tias HPMC tsim cov txheej txheem tiv thaiv ntawm qhov chaw ntawm lub plaster uas pab tiv thaiv nws los ntawm igniting los yog kis tau tus nplaim.
Lub xub ntiag ntawm HPMC hauv qhov sib tov kuj tseem txhim kho cov thermal rwb thaiv tsev ntawm cov plaster. Qhov no yuav pab tiv thaiv kom tsis txhob muaj cua sov los ntawm kev nkag mus rau lub plaster, uas tuaj yeem pab txo qhov hluav taws kub.
nyob rau hauv xaus
HPMC yog cov khoom siv ntau yam khoom siv dav siv hauv cov khoom siv hauv tsev, tshwj xeeb tshaj yog cov cement lossis gypsum raws li plasters thiab plasters. Nws muaj ntau yam zoo xws li kev txhim kho cov txheej txheem, txhim kho adhesion, txhim kho huab cua, txhim kho durability thiab txhim kho hluav taws kub.
Siv HPMC hauv cement-los yog gypsum-based plasters thiab plasters tuaj yeem pab txhim kho kev ua haujlwm thiab kev ua haujlwm ntev ntawm cov ntaub ntawv no, ua rau lawv tiv taus hnav thiab cov khoom. Nws yog qhov zoo tagnrho rau cov neeg cog lus thiab cov neeg tsim khoom uas xav ua kom zoo thiab ua haujlwm ntev ntawm qhov project tiav.
Post lub sij hawm: Aug-03-2023