HPMC (hydroxypropyl methylcellulose) yog ib yam khoom siv tseem ceeb hauv kev tsim kho, tshwj xeeb tshaj yog siv dav hauv cov txheej txheem kev tsim kho xws li kev tso pobzeb. Nws yog cov cellulose ether uas tsis yog ionic tau los ntawm kev hloov kho tshuaj ntawm cov paj rwb ntuj. HPMC ua lub luag haujlwm tseem ceeb hauv cov nplaum pobzeb vim nws ua tau zoo heev.
1. Cov nyhuv tuab
HPMC muaj cov yam ntxwv zoo uas ua rau cov nplais nplaum ua rau cov nplais nplaum ntau dua, ua rau nws yooj yim dua rau kev nthuav dav ntawm qhov chaw tsim kho thiab tswj kev siv sib npaug. Cov yam ntxwv ua kom tuab tsis yog tsuas yog txhim kho kev ua haujlwm ntawm kev tsim kho xwb, tab sis kuj pab tswj lub sijhawm qhib ntev dua thaum lub sijhawm tsim kho, uas yog, cov nplais tuaj yeem hloov kho rau qhov chaw rau ib lub sijhawm tom qab thov.
2. Kev khaws dej
Lwm lub luag haujlwm tseem ceeb ntawm HPMC yog khaws dej. Thaum siv cov nplaum pobzeb, yuav tsum muaj dej ntau kom ntseeg tau tias cov cement lossis lwm yam khoom siv cementitious tuaj yeem coagulate thiab tawv ib txwm. Yog tias cov dej poob sai dhau, cov khoom siv cementitious tsis tuaj yeem teb tag nrho, ua rau lub zog sib txuas txo qis. HPMC tuaj yeem tiv thaiv kev poob dej, tswj cov dej hauv cov nplaum, thiab muab sijhawm txaus rau cov nplaum kom khov thiab tsim cov txheej sib txuas muaj zog.
3. Cov khoom tiv thaiv kev plam
Hauv kev tso vuas, cov khoom tiv thaiv kev plam yog qhov tseem ceeb heev vim tias cov vuas yooj yim swb thaum lawv raug ntsia rau ntawm phab ntsa lossis cov chaw ntsug. HPMC ua rau thixotropy ntawm cov nplaum, ua kom ntseeg tau tias cov vuas tuaj yeem ruaj khov rau ntawm cov chaw ntsug yam tsis swb, yog li txhim kho qhov tseeb ntawm kev tsim kho.
4. Ntev lub sijhawm qhib
Thaum lub sijhawm tsim kho, lub sijhawm qhib yog lub sijhawm uas cov nplaum pobzeb tseem nplaum zoo tom qab siv. HPMC tuaj yeem ncua lub sijhawm qhib, ua rau cov neeg ua haujlwm kho thiab tso cov pobzeb ntev dua, txhim kho kev ywj pheej ntawm kev tsim kho, tshwj xeeb tshaj yog haum rau kev tso loj lossis cov xwm txheej tsim kho nyuaj.
5. Txhim kho lub zog sib txuas
HPMC kuj tseem tuaj yeem txhim kho lub zog sib txuas ntawm cov nplais pobzeb. Thaum siv ua ke nrog cov khoom siv inorganic xws li cement, qhov muaj HPMC tuaj yeem txhim kho cov khoom sib txuas ntawm cov nplais, ua kom cov pobzeb ruaj khov thiab tsis poob tom qab kho, thiab tswj lawv qhov ruaj khov rau lub sijhawm ntev.
6. Txhim kho kev ua haujlwm ntawm kev tsim kho
Qhov lubricity ntawm HPMC ua rau cov nplaum yooj yim dua rau kev siv, tshwj xeeb tshaj yog thaum lub sijhawm loj tso, nws tuaj yeem ua rau daim ntawv thov du thiab txo qhov kev siv zog ntawm cov neeg ua haujlwm tsim kho. Tib lub sijhawm, qhov zoo heev dispersibility ntawm HPMC tuaj yeem ua rau ntau yam khoom sib npaug thaum lub sijhawm do, yog li txhim kho qhov sib xyaw ua ke ntawm cov khoom sib xyaw.
7. Kev tiv thaiv huab cua thiab kev tiv thaiv khov-thaw
Vim nws tiv taus huab cua zoo thiab tiv taus khov-thaw, HPMC tuaj yeem ua tau zoo nyob rau hauv ntau yam huab cua sib txawv. Tshwj xeeb tshaj yog nyob rau hauv thaj chaw txias, cov nplaum pobzeb yuav muaj kev rov ua dua ntawm kev khov-thaw, uas ua rau muaj kev xav tau ntau dua rau lawv cov khoom sib txuas. HPMC tuaj yeem pab cov nplaum tseem tswj tau lawv lub zog sib txuas thiab tawv nyob rau hauv cov xwm txheej no.
Lub luag haujlwm ntawm HPMC hauv cov nplaum pobzeb muaj ntau yam, suav nrog kev ua kom tuab, khaws dej, txhim kho lub zog sib txuas, tiv thaiv kev plam thiab ntev lub sijhawm qhib. Vim yog cov yam ntxwv zoo no uas HPMC tau dhau los ua cov khoom siv tseem ceeb hauv kev tsim kho, tshwj xeeb tshaj yog hauv kev tso pobzeb. Nws siv tsis yog tsuas yog txhim kho kev ua haujlwm ntawm kev tsim kho xwb, tab sis kuj ua kom muaj kev ruaj khov mus sij hawm ntev tom qab tso.
Lub sijhawm tshaj tawm: Lub Kaum Hli-08-2024