HPMC (CAS: 9004-65-3), raws li additive lug siv nyob rau hauv lub teb ntawm lub tsev cov ntaub ntawv, yog tsuas yog siv rau cov dej tuav, thickening thiab txhim kho lub workability ntawm cov khoom tiav. Dej tuav tus nqi yog ib tug ntawm cov tseem ceeb qhia thaum koj xaiv high-zoo HPMC, yog li cia peb saib ze ze ntawm cov yam tseem ceeb t cuam tshuam cov dej tuav.
1.Qhov ntau npaum li cas ntawm HPMC, thiab nws cov dej tuav tau yog ncaj qha proportional rau tus nqi ntxiv. Tus nqi ntawm HPMC siv hauv cov khoom siv hauv tsev hauv kev ua lag luam txawv nyob ntawm qhov zoo. Nws yog feem ntau ntxiv rau hauv xws li kev sib txuas, plastering, anti-cracking mortar, thiab lwm yam. Qhov ntau ntxiv yog 2 ~ 2.5 KG / MT, qhov ntxiv ntawm putty thiab lwm yam yog nyob nruab nrab ntawm 2 ~ 4.5 KG / MT, cov nplais nplaum yog nruab nrab ntawm 3.5 ~ 4 KG / MT, thiab tus nqi ntawm cov pobzeb grout yog 0.3 MT ~ 1 KG / MT qhov sib txawv, kev tsim kho qhov dav thiab qhov dav. Tus kheej-leveling mortar yog nruab nrab ntawm 0.2 ~ 0.6 KG / MT, thiab ETICS yog nruab nrab ntawm 4 ~ 7 KG / MT. Nyob rau hauv qhov ntau, qhov ntau HPMC tau ntxiv, kev tuav dej yuav zoo dua.
2.Qhov cuam tshuam ntawm kev tsim kho ib puag ncig. Cov av noo, kub, cua siab, cua ceev thiab lwm yam yuav cuam tshuam rau cov volatilization tus nqi ntawm cov dej hauv cement mortar thiab gypsum-based khoom. Hauv cov caij nyoog sib txawv thiab cov cheeb tsam sib txawv, cov dej khaws cia ntawm tib yam khoom yuav sib txawv, tab sis feem ntau, Kub muaj qhov cuam tshuam zoo rau cov dej tuav tus nqi, yog li muaj kev pom ntawm lub khw: HPMC nrog cov gel kub dua yog cov khoom lag luam zoo nrog cov dej khaws cia siab.
3.Cov txheej txheem ntau lawm thiab viscosity ntawm cellulose ether -HPMC. Cov pab pawg methoxy thiab hydroxypropoxy yog sib npaug ntawm cov saw cellulose molecular, uas tuaj yeem ua rau muaj kev sib koom ua ke ntawm oxygen atoms ntawm hydroxyl thiab ether bonds nrog dej. Lub peev xwm ntawm hydrogen bonding ua rau cov dej dawb ua cov dej khi, yog li tswj tau cov dej evaporation zoo thiab ua tiav cov dej khaws cia siab.
Thaum lub viscosity ntawm HPMC nce, cov dej tuav tus nqi kuj nce, cov viscosity nce mus txog ib theem, cov dej tuav tus nqi nce. Nws zoo li tiaj tus. Ib qho yooj yim txheej txheem cej luam. Cov dej tuav dej ntawm HPMC raug cuam tshuam los ntawm txhua yam. Qhov kev xaiv tsis tuaj yeem ua raws li ib qho qhia.
Post lub sij hawm: May-16-2022