HPMC ua tus Dispersant hauv Kev Ua tiav Tsev
HPMC, raws li ib tug dispersant, thickener, thiab binder nyob rau hauv lub tsev tiav, feem ntau yog siv nyob rau hauv molding ntawm cement mortar thiab gypsum khoom. Nws yog siv rau hauv cov cement mortar kom nws adhesion, txo flocculation, txhim kho viscosity thiab shrinkage, thiab tswj cov dej noo. Nws txo cov dej noo los ntawm cov pob zeb, ua kom muaj zog, thiab tiv thaiv kev tawg thiab huab cua los ntawm dej- cov ntsev ntsev. HPMC muaj cov khoom thixotropic, tso cai rau kev npaj qis - ntws, ib - lub sij hawm tuab gypsum txheej ntawm cov phab ntsa ntsug. HPMC txhim kho adhesion thiab structural zog, ua rau nws tsim nyog rau kev npaj yooj yim ntws tsuag mortars rau nyias - txheej txheej.
Tus nqi ntawm HPMC siv hauv cov khoom siv hauv tsev tsawg heev, tsuas yog 0.1% mus rau 1%, tab sis nws cov teebmeem tseem ceeb. Nws tuaj yeem siv los ua plasticizer, thickener, dej-retaining agent, air-entraining agent, and retarder in coatings, plaster, mortars, etc., thiab hauv cov khoom cement. Tus neeg sawv cev no yog siv los ua kom cov txheej txheem ua tau zoo, tuav dej, lossis adhesion rau substrates. Tsis tas li ntawd, nws yuav tsum yog ib puag ncig tus phooj ywg. Qhuav-kev sib tov sib xyaw kom tsis txhob muaj kev ua haujlwm tsis ruaj khov, ib puag ncig kev tsim kho tsis zoo, thiab kev ua haujlwm tsis tshua muaj tshwm sim los ntawm - qhov chaw sib xyaw thiab ib puag ncig muaj kuab lom. Pobzeb nplaum thiab sab hauv / sab nrauv phab ntsa putties yav dhau los tau siv ntau dua 107 hom nplaum. Los ntawm ib puag ncig kev xav, siv cellulose ethers, xws li HEC thiab HPMC, yog qhov zoo tshaj plaws.
Txawm hais tias cov cement muaj cov khoom sib txuas zoo, kev sib koom ua ke ntawm cov cement paste thiab cement mortar sib txawv vim muaj kev hloov pauv ntawm cov khoom thiab cov xwm txheej ntawm cov txheej txheem sib txuas thiab kev sib txuas ntawm qhov chaw thaum tsim kho, tshwj xeeb tshaj yog nyob rau hauv cov nqe lus ntawm kev nqus dej. Ib qho kev sib txuas loj tuaj yeem ua rau lub cev qhuav dej ntawm qhov sib txuas, txo cov yas ntawm cov cement mortar, txo cov adhesion, thiab txo qis zog. Yav dhau los, gypsum los yog 107 kua nplaum tau ntxiv rau cov cement mortar, tab sis qhov no tseem muaj qee qhov tsis zoo, xws li tsis muaj kev ntsuas, tshuaj lom, thiab cov txheej txheem tsim kho. Cellulose ethers muaj cov nyhuv thickening hauv dej thiab tsis muaj zog alkalis.
Cov teebmeem ntawm kev ntxiv cellulose ethers muaj xws li:
Txhim kho lub sijhawm pib thiab zaum kawg ntawm cov cement;
Ntxiv qhov txwv ntawm cov cement mortar kom kov yeej lub siab;
Txhim kho lub peev xwm tuav dej ntawm cov cement thiab gypsum;
Compacting thiab resisting cement mortar.
Lub zog shear raug txo; cov khoom sib txuas ntawm cov mortar tau txhim kho.
