Hauv cov ntaub ntawv hauv tsev niaj hnub, muab tshuaj khib kom qhuav yog siv nce zuj zus. Nws yog cov khoom siv hauv tsev zoo uas muaj kev tsim kho zoo thiab txhim khu kev qha engineering zoo. Siv dej siab rau hydroxypropyl methylculose (HPMC) hauv kev sib xyaw qhuav huv tau txhim kho cov tshuaj khib.
1. Cov khoom yooj yim ntawm HPMC
HydroxyPropyyl methylcellose (HPMC) yog qhov tsis-ionic cellulose ether dav siv hauv cov ntaub ntawv hauv tsev. Nws yog tsim los ntawm kev siv tshuaj lom neeg ntawm cov cellulose ntuj thiab muaj peev xwm ua kom zoo tshaj plaws Nws cov yam ntxwv tseem ceeb muaj xws li:
Kev khaws dej siab dua: HPMC tuaj yeem txhim kho kev ua kom huv lub zog ntawm cov tshuaj khib, txo cov dej evaporation thiab dej pom.
Thickening cov nyhuv: los ntawm kev nce viscosity ntawm cug, hpmc tuaj yeem txhim kho nws cov kev tawm tsam thiab ua haujlwm.
Txhim kho kev tsim kho kev tsim kho: ntxiv rau ntawm HPMC txhawm rau tshuaj khib muab cov tshuaj khib zoo dua kev tsim kho, xws li qhib lub sijhawm siv hluav taws xob ntev dua.
Qhov kub kub kuj: HPMC muaj cov cua sov tsis kam thiab tuaj yeem tswj hwm nws cov kev ua haujlwm nyob rau hauv qhov kub thiab txias.
2. Cov nyhuv ntawm HPMC ntawm kev ua yeeb yam ntawm cov tshuaj khib sib xyaw
2.1. Dej ceev
Cov dej txuag siab yog ib qho ntawm cov yam ntxwv tseem ceeb ntawm HPMC. Nyob rau hauv qhuav-mix cug, dej khaws cia yog qhov tseem ceeb vim tias nws txiav txim siab txog kev ua kom cov hmoov xis. HPMC tuaj yeem tsim cov yeeb yaj kiab tsis zoo xws li cov tshuaj khib nyiab los ntawm nws cov qauv molecules, uas tuaj yeem tiv thaiv cov dej lwg me me thiab tiv thaiv kom sai. Cov txiaj ntsig tseem ceeb ntawm cov dej siab khaws cia muaj xws li:
Lub sijhawm ua haujlwm ua haujlwm: Siv sijhawm siv sijhawm ntev kom muaj sijhawm txaus los ua haujlwm thiab txo cov teeb meem ntawm kev siv hluav taws xob yooj yim tom qab lub ntsej muag qhuav.
Txhim kho kev ua tau zoo ntawm kev ua kom dej ntawm cov dej haus cawv kom ua kom muaj kev sib xyaw ua ke, kev txhim kho lub zog thiab cov nplaum ntawm cug.
Txo cov kab nrib pleb: kev khaws cov dej zoo yuav ua rau tiv thaiv shrinkage tawg los ntawm cov dej tsis ua haujlwm.
2.2. Txhim kho kev tsim kho kev tsim kho
Cov nyhuv tuab ntawm HPMC muaj cov cawv tseem ceeb ntawm kev tsim kho cov tshuaj khib nyiab qhuav. Nws yog feem ntau tau cuam tshuam hauv cov hauv qab no:
Txhim kho los tiv thaiv sagging: thaum ua ntawv thov rau ntsug qhov chaw lossis qab zib, HPMC tuaj yeem tiv thaiv kev khib thiab ua kom pom tseeb tias cov tshuaj khib tau ua raws li kev tsim kho.
Txhim kho cov roj pleev: HPMC tuaj yeem txhim kho lubricity cug, ua kom nws yooj yim dua rau kev ntws tawm thiab kis rau ntawm kev tsim kho cov cuab yeej siv, txo qis qhov nyuaj ntawm kev tsim kho.
Txhim kho cov nplaum: los ntawm kev txhim kho cov coesion ntawm cug, hpmc tuaj yeem txhim kho cov nplaum ntawm cug thiab substrate, txo qhov kev pheej hmoo ntawm kev poob thiab tev.
3.3. Txhim kho ruaj khov
Cov dej khaws cia hauv HPMC tsis yog tsuas yog muaj kev cuam tshuam zoo rau kev xaim hluav taws xob ntev ntawm cov tshuaj khib nyiab:
Kev txo cov dej tawg thiab tawg: tshuaj khib nrog dej zoo muaj cov dej khov kho, txo qhov kev pheej hmoo ntawm qhov tsis sib haum thiab tawg.
Txhim kho cov hnav tsis kam thiab cuam tshuam tiv thaiv: cov qauv cug dua ntawm HPMC ua rau nws muaj ntau dua tom qab tawv, yog li kev txhim kho cov khoom tiv thaiv thiab cuam tshuam ntawm cov khoom siv.
4.4. Ib puag ncig kev yoog
HPMC hloov pauv hloov kom kub ua rau cov collhle qhuav-sib xyaw kom tswj tau kev ua tau ruaj khov nyob rau ib puag ncig ib puag ncig:
Kuj zoo siab rau cov kev hloov pauv: HPMC tuaj yeem tswj hwm nws cov kev ua kom muaj cov dej ua kom muaj cov kev mob siab thiab cov pa taws sib txawv.
Kev tiv thaiv kom tsis txhob muaj dej ntxiv: nyob rau hauv ib puag ncig kub thiab qhuav, HPMC tuaj yeem ua kom cov pa hluav taws xob qeeb thaum kev tsim kho thiab tawv.
3. Cov ntaub ntawv thov ntawm HPMC hauv cov kab cug qhuav qhuav
3.1. Vuas nplaum nplaum
Nyob rau hauv cov nplais nplaum, cov dej khaws cia ntawm HPMC tuaj yeem ua kom paub tseeb tias cov nplaum muaj cov txheej txheem ua haujlwm, thaum ua kom muaj kev sib txig sib luag ntawm cov nplais thiab cov txheej txheem. Nws cov nyhuv tuab tuaj yeem tiv thaiv cov nplais ntawm zawv zawg thiab txhim kho cov khoom siv zoo.
3.2. Sab Nraud Rwb Thaiv Tsev System (EIFS)
Nyob rau hauv EIFS, cov dej khaws cia HPMC pab tiv thaiv cov kab cug rau ntawm pawg thawj coj ntawm kev poob dej sai sai, yog li zam kev tawg thiab teeling. Cov dej zoo khaws cia thiab thickening cov khoom tso cai rau lub tshuaj khib kom raug tusyees siv, kom muaj kev sib cais ntawm phab ntsa sab nrauv.
4.3. CUG SELFLING CUG
Nyob rau hauv tus kheej-level cug, lubricating nyhuv ntawm HPMC tuaj yeem txhim kho cov fluidity ntawm lub tshuaj khib, kom nws tuaj yeem ua lub tiaj thiab du chaw thaum lub sijhawm tswj hwm tus kheej. Nws cov dej khaws cia tseem ua kom pom tseeb tias cug tshuaj khib yuav tsis delaminate thaum lub sijhawm ua tus kheej, ua kom zoo rau cov khoom lag luam zoo.
5.4. Kev Cug
Tshuaj khib siv rau cov txheej txheem kev kho kom zoo yuav tsum tau kho kom zoo thiab ruaj khov. HPMC tuaj yeem txhim kho cov dej khaws cia ntawm cov tshuaj khib nyiab kho, tiv thaiv shrinkage tawg tom qab kev tsim kho, thiab txhim kho nws cov nplaum kom ntseeg tau cov nyhuv ntawm kev kho.
4. Kev ceev faj hauv kev siv HPMC
Txawm hais tias HPMC muaj ntau yam zoo hauv cov tshuaj cug qhuav, qee qhov teeb meem yuav tsum tau them nyiaj rau hauv daim ntawv thov tiag tiag los xyuas kom meej:
Ntse tshuaj tswj: cov tshuaj ntawm HPMC yuav tsum tau tswj hwm raws li cov mis tshwj xeeb. Siab dhau qhov kev siv tshuaj yuav ua rau lub tshuaj khib kom ua kom tiav thiab cuam tshuam kev tsim kho kev tsim kho; Tsawg dhau qhov ntau npaum li cas noj tau yuav tsis ua tiav cov kev cia siab.
Kev sib xyaw nrog lwm cov tshuaj ntxiv: HPMC feem ntau sib xyaw nrog lwm cov tshuaj ntxiv, yog li nws yog qhov tsim nyog kom ntseeg tau tias lwm cov khoom xyaw kom tsis txhob muaj kev cuam tshuam tsis zoo.
Txawm nws sib xyaw: HPMC yuav tsum tau tag nrho cov kev sib xyaw ua ke kom ntseeg tau tias kev sib xyaw kom ua si rau nws cov dej khaws cia thiab cov teebmeem tuab tuab.
Daim ntawv thov ntawm dej siab khaws hydroxypropyyl methylrocellulose (hpmc) hauv kev txhim kho dej sib xyaw, txhim kho kev tsim kho dej, ua rau muaj kev tsim kho kom zoo thiab hloov kho rau ib puag ncig ib puag ncig. Cov yam ntxwv no ua HPMC qhov tsis tseem ceeb thiab tseem ceeb ntawm kev sib xyaw ua ke hauv tov qhuav. Nyob rau hauv cov txheej txheem ntawm kev tsim kho, kev siv hluav taws xob ntawm HPMC tuaj yeem txhim kho kev ua tau zoo ntawm lub tshuaj khib, kom ua tau zoo ntawm txoj haujlwm thiab kev tsim kho. Nrog kev txhim kho kev ua tsev hauv tsev, cov ntawv thov kev sib xyaw ntawm HPMC hauv cov innove qhuav, nqa ntau lub tswv yim thiab kev nce qib mus rau kev tsim kho kev tsim kho.
Lub Sijhawm Post: Feb-17-2025