HPMC (Hydroxypropyl Methylcellulose)yog ib qho cellulose ether uas tsis yog ionic. Nws yog ib qho polymer uas yaj tau hauv dej uas tau hloov kho los ntawm ntau yam kev tshuaj lom neeg siv cov khoom siv polymer ntuj - paj rwb pulp lossis ntoo pulp ua cov khoom siv raw. Nws yog siv dav hauv ntau yam lag luam xws li kev tsim kho, tshuaj, khoom noj, thiab cov tshuaj txhua hnub, tshwj xeeb tshaj yog hauv cov ntaub ntawv tsim kho xws li hmoov putty, mortar, nplaum pobzeb, xim latex, thiab lwm yam, ua lub luag haujlwm tseem ceeb heev.
Ntxiv HPMC rau hauv phab ntsa putty feem ntau yog los txhim kho kev ua haujlwm ntawm kev tsim kho thiab qhov kawg ntawm putty. Putty yog cov khoom siv hauv tsev siv rau kev kho thiab kho phab ntsa, feem ntau yog ua los ntawm hmoov talcum, calcium hnyav, cement, lime calcium, kua nplaum hmoov, thiab lwm yam.
1. Kev khaws cia dej zoo dua
Ib qho ntawm cov haujlwm tseem ceeb ntawm HPMC yog los txhim kho qhov khaws dej ntawm putty. Yog tias putty poob dej sai dhau thaum lub sijhawm tsim kho, cov khoom siv inorganic gelling xws li cement yuav pib qhuav thiab tawg ua ntej lawv tau hydrated tag nrho, uas yuav ua rau muaj teeb meem xws li tawg, tev tawm, thiab hollowing ntawm putty. HPMC muaj lub zog nqus dej thiab muaj peev xwm khaws dej, uas tuaj yeem qeeb qeeb qhov evaporation ntawm dej, yog li cov dej hauv putty tuaj yeem koom nrog ntau dua hauv cov tshuaj tiv thaiv hydration ntawm cement lossis lime, txhim kho qhov nyuaj thiab lo rau ntawm putty, thiab txhim kho qhov zoo ntawm kev tsim kho.
2. Txhim kho kev ua haujlwm ntawm kev tsim kho
HPMC tuaj yeem txhim kho qhov ua haujlwm tau zoo thiab kev ua haujlwm ntawm cov putty, ua rau nws yooj yim dua rau khawb thiab nthuav. Nws cov roj nplua nyeem zoo heev thiab kev sib kis tau zoo tuaj yeem ua rau cov putty du thiab mos dua, nrog rau qhov zoo thaum lub sijhawm tsim kho, yooj yim rau kev tswj hwm, thiab kev ua haujlwm zoo dua. Tib lub sijhawm, qhov chaw tom qab tsim kho yog du thiab tiaj tus, tso lub hauv paus zoo rau kev pleev xim lossis pleev xim tom qab.
3. Cov nyhuv tuab
HPMC muaj cov khoom ua kom tuab zoo, uas tuaj yeem txhim kho qhov viscosity ntawm putty, yog li nws tuaj yeem lo rau ntawm phab ntsa zoo dua, tsis yooj yim rau sag lossis hmoov. Qhov thickening effect no tsis yog tsuas yog ua kom muaj kev ruaj khov ntawm putty, tab sis kuj tuaj yeem kho qhov sib xws ntawm putty kom hloov kho nws rau ntau yam kev xav tau kev tsim kho (xws li kev khawb tes lossis tshuab txau).
4. Txhim kho kev sib txuas
HPMC tuaj yeem txhim kho qhov kev sib txuas ntawm putty thiab phab ntsa hauv qab. Tom qab ntxiv HPMC kom raug rau hauv cov hmoov putty, qhov kev sib txuas ntawm cov ntaub ntawv tuaj yeem txhim kho, ua rau cov txheej putty tsis tshua poob, tiv thaiv kev tawg thiab tawg ntawm phab ntsa, thiab txuas lub neej ua haujlwm ntawm cov txheej kho kom zoo nkauj phab ntsa.
5. Ntev lub sijhawm qhib
HPMC tuaj yeem ntev lub sijhawm qhib ntawm putty (piv txwv li lub sijhawm uas tuaj yeem kho tau tom qab kev tsim kho), zam kev pov tseg tsis tsim nyog lossis kev kho kom zoo uas tshwm sim los ntawm kev ziab sai sai ntawm putty los ntawm cov neeg ua haujlwm tsim kho hauv qhov kub siab lossis qhov chaw qhuav. Qhov no tseem ceeb heev rau kev tsim kho loj lossis cov txheej txheem uas xav tau ntau qhov khawb.
6. Tiv thaiv kev poob qis
Thaum tsim cov phab ntsa ntsug, HPMC tuaj yeem txhim kho kev ua haujlwm tiv thaiv kev poob qis ntawm putty, ua rau nws tsis tshua muaj kev swb thiab deform tom qab kev tsim kho, tshwj xeeb tshaj yog haum rau kev tsim kho tuab lossis ntau txheej scraping scenes, txhim kho kev ruaj khov ntawm kev tsim kho.
Ntxiv rau qhov zoo ntawm kev ua tau zoo saum toj no, HPMC kuj tseem muaj kev nyab xeeb thiab zoo rau ib puag ncig thaum siv. Nws yog cov khoom tsis muaj tshuaj lom, tsis muaj ntxhiab, tsis xeb, biodegradable uas yuav tsis ua rau tib neeg noj qab haus huv thiab ib puag ncig puas tsuaj, thiab yog nyob rau hauv kab nrog kev txhim kho ntawm cov ntaub ntawv tsev ntsuab niaj hnub.
Yuav tsum nco ntsoov tias qhov kev ua tau zoo ntawm HPMC raug cuam tshuam los ntawm nws cov yam ntxwv lub cev thiab tshuaj xws li viscosity, qib hloov pauv, qhov loj me ntawm cov khoom me me, cov ntsiab lus tshauv, thiab lwm yam. Yog li ntawd, thaum xaiv thiab siv nws, hom khoom HPMC tsim nyog yuav tsum tau xaiv raws li cov yam ntxwv xws li cov mis putty, txoj kev tsim kho thiab cov huab cua.
Raws li ib qho tseem ceeb additive hauv putty hmoov,HPMCNws ua rau zoo dua qub thiab ua rau cov putty zoo dua qub los ntawm kev txhim kho kev khaws dej, kev ua haujlwm ntawm kev tsim kho, kev nplaum thiab kev ruaj khov. Nws yog ib qho ntawm cov khoom tseem ceeb thiab tseem ceeb ntawm cov phab ntsa niaj hnub. Hauv kev nrhiav kev ua haujlwm siab, kev ua haujlwm zoo, kev tiv thaiv ib puag ncig thiab kev txuag hluav taws xob, HPMC yuav txuas ntxiv ua lub luag haujlwm tseem ceeb.
Lub sijhawm tshaj tawm: Plaub Hlis-15-2025