Putty hmoov yog cov khoom siv hauv tsev nrov siv los sau qhov khoob, cov kab nrib pleb thiab qhov hauv qhov chaw ua ntej pleev xim lossis pobzeb. Nws cov khoom xyaw yog tsim los ntawm gypsum hmoov, talcum hmoov, dej thiab lwm yam ntaub ntawv. Txawm li cas los xij, cov txheej txheem niaj hnub no tseem muaj cov khoom xyaw ntxiv, hydroxypropyl methylcellulose (HPMC). Kab lus no yuav tham txog vim li cas peb ntxiv HPMC rau cov hmoov nplej thiab cov txiaj ntsig nws coj.
Hydroxypropyl methylcellulose yog dej-soluble polymer muab tau los ntawm cellulose, lub ntsiab tivthaiv ntawm cov nroj tsuag cell phab ntsa. Nws yog dav siv nyob rau hauv ntau yam lag luam xws li kev tsim kho, tshuaj, textile thiab zaub mov. Hauv kev tsim kho, nws yog siv los ua cov khoom hauv mortars, grouts, xim thiab putties.
Ntxiv HPMC rau putty hmoov muaj cov hauv qab no zoo:
1. Ua kom cov dej khaws cia
HPMC yog hydrophilic polymer uas absorbs thiab khaws cov dej molecules. Ntxiv HPMC rau putty hmoov tuaj yeem txhim kho nws cov dej tuav kev ua haujlwm. Thaum lub sij hawm tsim kho, cov hmoov putty tov nrog HPMC yuav tsis qhuav sai heev, muab cov neeg ua hauj lwm nrog lub sij hawm txaus los tuav cov khoom thiab ua tau zoo nyob rau hauv lub qhov khoob tsis ua rau cov khoom tawg los yog shrinkage. Nrog rau kev tuav dej ntau ntxiv, cov hmoov putty kuj zoo rau qhov chaw, txo qhov yuav ua rau tawg lossis tev.
2. Txhim kho kev ua haujlwm
Putty hmoov sib tov nrog HPMC los ua ib qho kev sib xyaw ua ke, ua kom yooj yim rau kev thov thiab kis mus thoob qhov chaw. HPMC muab cov hmoov putty ib tug smoother kev ntxhib los mos, muab ib tug zoo tiav thaum painting los yog tiling. Nws kuj muab cov putty muaj txiaj ntsig zoo, muaj peev xwm tiv taus deformation nyob rau hauv siab. Qhov no txhais tau hais tias putty hmoov tov nrog HPMC tuaj yeem ua tau yooj yim zoo li tus thiab molded kom haum rau ntau qhov chaw.
3. Txo shrinkage thiab tawg
Raws li tau hais ua ntej, HPMC tuaj yeem txhim kho cov dej khaws cia ntawm cov hmoov putty. Yog li ntawd, putty hmoov tsis tshua yuav qhuav sai heev thaum siv rau ntawm qhov chaw, ua rau shrinkage thiab tawg. HPMC kuj tseem pab txo qis qis thiab tawg vim tias nws ua rau kom muaj zog ntawm cov hmoov putty, ua rau cov khoom ruaj khov thiab tsis tshua muaj kev tawg.
4. Zoo dua tiv thaiv dej thiab kub hloov
Cov hmoov putty tov nrog HPMC muaj kev tiv thaiv zoo rau dej thiab kub hloov dua li cov hmoov putty tsis muaj HPMC. HPMC yog hydrophilic polymer uas tiv thaiv putty hmoov los ntawm qhov kub thiab txias hloov. Qhov no txhais tau hais tias cov hmoov putty tov nrog HPMC muaj zog dua thiab tuaj yeem tiv taus ntau yam huab cua.
5. Lub neej txee ntev dua
Ntxiv HPMC rau putty hmoov tuaj yeem ua rau nws lub neej txee ntev. HPMC tiv thaiv cov hmoov putty los ntawm ziab tawm thiab hardening thaum lub sij hawm cia. Qhov no txhais tau tias cov hmoov putty tov nrog HPMC tuaj yeem khaws cia ntev dua yam tsis tau poob zoo lossis ua tsis tau.
Txhawm rau ua kom tiav, ntxiv HPMC rau cov hmoov nplej muaj ntau qhov zoo. Nws ua kom cov dej tuav tau, txhim kho cov txheej txheem, txo qhov shrinkage thiab tawg, muab kev tiv thaiv zoo dua rau dej thiab kub hloov pauv, thiab ncua lub neej txee. Tag nrho cov txiaj ntsig no ua kom ntseeg tau tias cov hmoov putty tov nrog HPMC yuav ua kom tiav zoo dua thiab ruaj khov dua. Yog li ntawd, nws yog ib qho tseem ceeb uas ua rau muaj kev vam meej ntawm txhua qhov kev tsim kho.
Zuag qhia tag nrho, kev siv HPMC hauv cov hmoov putty yog qhov kev txhim kho zoo rau kev tsim kho kev lag luam. Nws muaj ntau yam txiaj ntsig uas pab ua kom txhua tus neeg txoj haujlwm yooj yim dua, ua haujlwm tau zoo thiab ua haujlwm tau zoo. Kev siv txuas ntxiv tuaj yeem ua rau muaj kev tsim kho tshiab ntxiv uas txhim kho cov khoom siv hauv tsev thiab kev tsim kho kom zoo.
Post lub sij hawm: Aug-04-2023