Kev ua haujlwm ntawm HPMC/HEC hauv Cov Khoom Siv Hauv Tsev

Hydroxypropyl methylcellulose (HPMC) thiab Hydroxyethyl cellulose (HEC) yog ob qho tib si cellulose ethers uas feem ntau siv hauv kev tsim kho kev lag luam vim lawv cov khoom siv ntau yam. Nov yog qee qhov haujlwm ntawm HPMC / HEC hauv cov khoom siv hauv tsev:

1. Kev tuav dej: HPMC / HEC tuaj yeem khaws cov dej hauv cov khoom siv hauv tsev, txhim kho lawv cov kev ua haujlwm thiab txo qhov kev pheej hmoo ntawm kev tawg thiab shrinkage. Lawv tsim ib zaj duab xis nyias nyob ib ncig ntawm cov cement hais, uas ua rau cov evaporation ntawm dej thaum lub sijhawm kho.
2. Thickening: HPMC / HEC tuaj yeem ua cov khoom siv hauv tsev, txhim kho lawv cov khoom rheological thiab txhim kho lawv cov adhesion. Lawv nce lub viscosity ntawm qhov sib tov, txo qhov kev pheej hmoo ntawm sagging thiab dripping.
3. Kev khi: HPMC / HEC tuaj yeem ua raws li cov ntaub ntawv hauv tsev, txhim kho lawv lub zog thiab ruaj khov. Lawv tsim ib qho kev sib raug zoo nrog cov cement hais, txhim khu kev sib raug zoo ntawm kev sib tov.
4. Kev tiv thaiv nto: HPMC / HEC tuaj yeem tiv thaiv qhov chaw ntawm lub tsev cov ntaub ntawv los ntawm ib puag ncig xws li ya raws, UV hluav taws xob, thiab tshuaj lom neeg raug. Lawv tsim ib zaj duab xis nyias ntawm qhov chaw ntawm cov khoom, txo qhov kev pheej hmoo ntawm degradation thiab txhim kho lub durability ntawm cov khoom.
5. Lubrication: HPMC / HEC tuaj yeem ua cov roj nplua nyeem hauv cov khoom siv hauv tsev, txhim kho lawv cov khoom ntws thiab txo qhov kev pheej hmoo ntawm clumping thiab cais tawm. Lawv txo qhov kev sib txhuam ntawm cov cement particles, txhim khu kev ua haujlwm ntawm kev sib tov.

Zuag qhia tag nrho, kev ua haujlwm ntawm HPMC / HEC ua rau lawv cov khoom xyaw tseem ceeb hauv cov khoom siv hauv tsev, txhim kho lawv cov kev ua tau zoo, thiab txhim kho lawv txoj haujlwm. Lawv feem ntau siv rau hauv ntau daim ntawv thov, xws li cementitious mortars, pobzeb adhesives, gypsum-based cov ntaub ntawv, thiab coatings.