HPMC (Hydroxypropylmethylcellulose) yog ib qho cellulose derivative uas feem ntau siv rau hauv cov ntaub ntawv siv hauv kev tsim kho, tshwj xeeb tshaj yog cov cement lossis gypsum based plasters thiab plasters. Nws yog ib qho multifunctional additive uas txhim kho kev ua tau zoo ntawm cov ntaub ntawv no thiab txhim kho lawv cov khoom. HPMC yog ib qho polymer soluble hauv dej uas tuaj yeem yooj yim dispersed hauv dej los ua ib qho tuab, homogeneous kua.
Hauv tsab xov xwm no, peb tshawb nrhiav ntau yam txiaj ntsig ntawm kev siv HPMC hauv cov cement lossis gypsum raws li plasters thiab plasters.
Txhim kho kev ua haujlwm tau zoo
Ib qho ntawm cov txiaj ntsig tseem ceeb ntawm kev siv HPMC hauv cov cement lossis gypsum raws li plasters thiab plasters yog nws txoj kev ua haujlwm tau zoo dua. Kev ua haujlwm tau hais txog qhov yooj yim uas cov khoom siv tuaj yeem sib xyaw, siv thiab ua tiav. HPMC ua haujlwm ua cov roj nplua nyeem, txhim kho kev ntws thiab kev nthuav dav ntawm cov khoom, ua rau nws yooj yim dua rau kev thov thiab ua tiav du.
Qhov muaj HPMC nyob rau hauv qhov sib xyaw kuj txo qhov kev siv dej ntawm cov khoom, uas pab tswj kev ntsws thiab tawg thaum lub sijhawm ziab. Qhov no txhais tau tias cov khoom yuav khaws nws cov duab thiab qhov loj me thiab yuav tsis tawg lossis ntsws vim yog kev poob dej noo.
Txhim kho kev sib txuas
HPMC kuj tseem tuaj yeem txhim kho qhov kev nplaum thiab kev ua kom zoo ntawm cov cement lossis gypsum raws li plasters rau ntawm qhov chaw hauv qab. Qhov no yog vim HPMC tsim ib zaj duab xis nyias nyias ntawm qhov chaw ntawm lub substrate uas ua haujlwm ua cov dej noo thiab tiv thaiv cov plaster los ntawm kev tev tawm lossis sib cais ntawm lub substrate.
Cov zaj duab xis uas tsim los ntawm HPMC kuj ua rau kom cov plaster sib txuas nrog lub substrate zoo dua los ntawm kev tsim kom muaj kev sib khi zoo ntawm ob qho. Qhov no ua rau lub zog thiab kev ruaj khov ntawm cov plaster nce ntxiv, ua rau nws tsis tshua tawg lossis tawg.
Txhim kho kev tiv thaiv huab cua
Cov cement lossis gypsum raws li plasters thiab plasters uas muaj HPMC tiv taus huab cua thiab kev yaig. Qhov no yog vim HPMC tsim ib daim zaj duab xis tiv thaiv rau ntawm qhov chaw ntawm plaster uas tiv thaiv dej thiab tiv thaiv cov dej noo kom tsis txhob nkag mus rau hauv cov khoom.
Cov yeeb yaj kiab tsim los ntawm HPMC kuj ua rau cov gypsum tiv taus UV hluav taws xob thiab lwm yam huab cua, tiv thaiv nws ntawm kev puas tsuaj los ntawm lub hnub, cua, nag thiab lwm yam khoom ib puag ncig.
Ua kom ruaj khov dua
Ntxiv HPMC rau hauv cov cement lossis gypsum raws li plasters thiab plasters txhim kho lawv cov durability tag nrho. Qhov no yog vim HPMC ua rau kom muaj kev ywj pheej thiab elasticity ntawm cov plaster, ua rau nws tsis tshua muaj kev tawg lossis tawg. HPMC kuj tseem ua rau kom muaj kev hnav thiab kev cuam tshuam ntawm cov khoom, ua rau nws tiv taus kev puas tsuaj ntau dua.
Qhov ua kom cov khoom siv no ruaj khov dua kuj ua rau nws tiv taus dej ntau dua xws li dej nkag mus, noo noo thiab pwm loj hlob. Qhov no ua rau nws yog cov khoom siv zoo tshaj plaws rau kev siv rau hauv cov chaw ntub dej xws li chav dej, chav ua noj thiab hauv qab nthab.
Txhim kho kev tiv thaiv hluav taws
Cov plasters uas muaj cement lossis gypsum thiab cov plasters uas muaj HPMC tiv taus hluav taws ntau dua li cov uas tsis muaj HPMC. Qhov no yog vim HPMC tsim ib txheej tiv thaiv rau ntawm qhov chaw ntawm cov plaster uas pab tiv thaiv nws kom tsis txhob kub hnyiab lossis kis hluav taws.
Qhov muaj HPMC nyob rau hauv qhov sib tov kuj txhim kho cov khoom rwb thaiv tsev thermal ntawm lub plaster. Qhov no pab tiv thaiv kom tsis txhob muaj cua sov nkag mus rau hauv lub plaster, uas tuaj yeem pab qeeb qeeb qhov kev sib kis ntawm hluav taws.
xaus lus
HPMC yog ib qho khoom siv ntau yam uas siv dav hauv cov ntaub ntawv siv hauv kev tsim kho, tshwj xeeb yog cov cement lossis gypsum based plasters thiab plasters. Nws muaj ntau yam zoo xws li kev ua haujlwm tau zoo dua, kev nplaum zoo dua, kev tiv taus huab cua zoo dua, kev ruaj khov dua thiab kev tiv taus hluav taws zoo dua.
Siv HPMC hauv cov cement- lossis gypsum-based plasters thiab plasters tuaj yeem pab txhim kho kev ua tau zoo thiab lub neej ntev ntawm cov ntaub ntawv no, ua rau lawv tiv taus kev hnav thiab cov ntsiab lus. Nws yog qhov zoo tagnrho rau cov neeg cog lus thiab cov neeg ua vaj tse uas xav kom ntseeg tau tias qhov zoo thiab kev ua haujlwm ntev ntawm qhov project tiav.
Lub sijhawm tshaj tawm: Lub Yim Hli-03-2023