Hydroxypropyl Methylcellulose (HPMC)yog ib qho uas tsis yog-ionic cellulose ether, uas yog siv dav hauv cov khoom siv hauv tsev, tshwj xeeb tshaj yog nyob rau hauv kho mortar. Raws li kev ua tau zoo ntxiv, HPMC feem ntau yog siv los ua cov dej ntim dej, cov khoom tuab, cov roj nplua nyeem thiab cov ntawv khi, thiab muaj cov txiaj ntsig zoo hauv kev txhim kho kev ua haujlwm ntawm kev kho tshuaj khib nyiab.
1. Cov yam ntxwv tseem ceeb ntawm HPMC
HPMC yog ib qho polymer compound hloov los ntawm ntuj cellulose los ntawm ntau cov tshuaj tiv thaiv. Nws cov qauv molecular muaj pawg xws li methoxy (-OCH₃) thiab hydroxypropyl (-CH₂CHOHCH₃). Lub xub ntiag ntawm cov khoom hloov pauv no ua rau HPMC zoo solubility thiab ruaj khov, tso cai rau nws sai sai yaj hauv dej txias los tsim cov kua dej ntshiab. Nws muaj qhov zoo thermal stability, enzymatic stability thiab muaj zog adaptability rau acids thiab alkalis, thiab yog dav siv nyob rau hauv lub tsev cov ntaub ntawv, coatings, tshuaj, zaub mov thiab lwm yam lag luam.
2. Lub luag haujlwm ntawm HPMC hauv kev kho cov mortar
Txhim kho kev tuav dej
Tom qab ntxiv HPMC rau cov khoom siv kho, nws cov dej tuav tau zoo tuaj yeem ncua kev poob dej thiab ua kom cov cement hydration txaus. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog rau cov txheej txheej nyias nyias los yog qhov kub thiab txias ib puag ncig, uas yuav pab tiv thaiv cov teeb meem xws li tawg thiab delamination, thiab txhim kho qhov ntom thiab lub zog ntawm cov mortar.
Txhim kho kev ua haujlwm
HPMC tuaj yeem txhim kho lubricity thiab kev ua haujlwm ntawm cov mortar, ua kom cov mortar kho smoother thaum lub sijhawm ua ntawv thov, yooj yim rau kev khiav lag luam thiab tsim. Nws cov nyhuv lubricating txo cov cuab yeej ua haujlwm thaum lub sijhawm tsim kho, uas pab txhim kho kev tsim kho kom zoo thiab ua kom tiav.
Txhim kho kev sib txuas ua haujlwm
Kev kho mortar feem ntau yog siv los kho qhov qub puag ncig, xav tau kev sib raug zoo ntawm cov tshuaj khib thiab lub hauv paus. Cov nyhuv thickening ntawm HPMC txhim khu kev sib txuas ntawm cov mortar thiab lub hauv paus, txo qhov kev pheej hmoo ntawm hollowing thiab ntog tawm, tshwj xeeb tshaj yog thaum tsim nyob rau hauv tshwj xeeb qhov chaw xws li ntsug nto los yog ceilings.
Tswj kev sib xws thiab anti-sagging
Cov nyhuv thickening ntawm HPMC tuaj yeem tswj tau qhov sib xws ntawm mortar, ua rau nws tsis tshua muaj sag los yog plam thaum siv rau ntawm ntsug lossis inclined nto, thiab tswj kev ruaj ntseg ntawm mortar thaum ntxov ntawm kev tsim. Qhov no yog qhov tseem ceeb rau kev txhim kho kev tsim kho kom zoo thiab ua tiav kev kho kom zoo.
Enhanced tawg kuj
Txij li thaum HPMC txhim kho cov dej tuav thiab hloov tau yooj yim ntawm mortar, nws tuaj yeem ua rau qeeb ntawm cov txheej txheem shrinkage, yog li inhibiting qhov tsim ntawm shrinkage tawg thiab txhim kho tag nrho durability ntawm cov txheej txheem kho.
3. Kev xyaum ua daim ntawv thov thiab cov lus pom zoo noj
Hauv kev siv tiag tiag, qhov ntau npaum li cas ntawm HPMC feem ntau yog 0.1% txog 0.3% ntawm qhov hnyav ntawm mortar. Cov koob tshuaj tshwj xeeb yuav tsum tau hloov kho raws li hom tshuaj khib, ib puag ncig kev tsim kho thiab kev ua haujlwm yuav tsum tau ua. Kev noj tshuaj tsis txaus yuav tsis ua nws lub luag haujlwm, thaum ntau npaum li cas yuav ua rau cov tshuaj khib nyiab ntau dhau, ua kom lub sijhawm teem sijhawm, thiab tseem cuam tshuam rau lub zog kawg.
Txhawm rau ua tiav cov txiaj ntsig zoo tshaj plaws, nws raug nquahu kom siv nws ua ke nrog lwm cov khoom ntxiv xws li redispersible latex hmoov, dej reducer, anti-cracking fiber, thiab lwm yam.
Daim ntawv thov ntawmHPMChauv kev kho mortar tau dhau los ua ib qho tseem ceeb hauv kev txhim kho cov khoom lag luam. Nws cov dej tuav tau zoo heev, thickening, workability thiab adhesion tsis tsuas yog txhim kho cov nyhuv ntawm kev kho mortar, tab sis kuj muab kev txhawb nqa rau kev kho kev tsim kho hauv cov cheeb tsam nyuaj. Raws li kev tsim kho kev lag luam txuas ntxiv nce nws cov kev xav tau rau kev ua haujlwm ntawm kev kho cov ntaub ntawv, daim ntawv thov tus nqi ntawm HPMC yuav ua tau zoo dua, thiab nws yuav yog ib qho tseem ceeb ntawm cov khoom siv hauv kev ua haujlwm siab hauv lub neej yav tom ntej.
Post lub sij hawm: Apr-04-2025