Hydroxypropyl Methylcellulose (HPMC) thiab Hydroxyethyl Cellulose (HEC) feem ntau yog siv rau hauv cov khoom siv hauv tsev vim lawv ntau yam haujlwm thiab cov khoom siv. Nov yog qee qhov ntawm lawv cov haujlwm tseem ceeb hauv cov khoom siv hauv tsev:

1. Kev tuav dej: HPMC thiab HEC ua cov dej tuav dej, pab tiv thaiv kev poob dej sai ntawm cov khoom siv cement xws li mortar thiab plaster thaum lub sijhawm kho. Los ntawm kev tsim ib zaj duab xis nyob ib ncig ntawm cov cement, lawv txo cov dej evaporation, tso cai rau lub sijhawm ntev hydration thiab txhim kho lub zog.
2. Kev Txhim Kho Kev Ua Haujlwm: HPMC thiab HEC txhim kho kev ua haujlwm ntawm cov khoom siv cement los ntawm kev ua kom lawv cov yas thiab txo kev sib txhuam ntawm cov khoom. Qhov no txhim khu kev sib kis tau, cohesiveness, thiab yooj yim ntawm daim ntawv thov ntawm mortars, renders, thiab pobzeb adhesives, yooj yim smoother thiab ntau uniform finishes.
3. Thickening thiab Rheology Control: HPMC thiab HEC ua haujlwm ua cov thickeners thiab rheology modifiers hauv tsev cov ntaub ntawv, kho lawv cov viscosity thiab ntws yam ntxwv. Lawv pab tiv thaiv kev daws teeb meem thiab kev sib cais ntawm cov khoom xyaw hauv kev tshem tawm, ua kom muaj kev faib ua homogeneous thiab kev ua haujlwm ruaj khov.
4. Adhesion Promotion: HPMC thiab HEC txhim kho cov adhesion ntawm cement-based cov ntaub ntawv rau substrates xws li pob zeb, masonry, thiab vuas. Los ntawm kev tsim cov yeeb yaj kiab nyias ntawm qhov chaw substrate, lawv txhim kho kev sib raug zoo thiab kev ua haujlwm ntawm cov mortars, renders, thiab pobzeb adhesives, txo qhov kev pheej hmoo ntawm delamination lossis tsis ua haujlwm.
5. Shrinkage Reduction: HPMC thiab HEC pab txo qis qis thiab tawg hauv cov khoom siv cement los ntawm kev txhim kho lawv qhov kev ruaj ntseg thiab txo qis hauv kev ntxhov siab. Lawv ua tiav qhov no los ntawm kev txhim kho particle packing, txo cov dej poob, thiab tswj tus nqi ntawm hydration, ua rau muaj kev ruaj khov thiab zoo nkauj zoo nkauj tiav.
6. Teem Lub Sijhawm Tswjhwm: HPMC thiab HEC tuaj yeem siv los hloov kho lub sijhawm teem sijhawm ntawm cov khoom siv cement los ntawm kev kho lawv qhov ntau npaum li cas thiab qhov hnyav molecular. Lawv muab kev yooj yim hauv kev tsim kho thiab tso cai rau kev tswj xyuas zoo dua ntawm cov txheej txheem teeb tsa, ua kom haum rau ntau yam kev xav tau thiab ib puag ncig.
7. Txhim kho Durability: HPMC thiab HEC pab txhawb rau lub sijhawm ntev ntawm cov khoom siv hauv tsev los ntawm kev txhim kho lawv cov kev tiv thaiv ib puag ncig xws li khov-thaw cycles, noo noo ingress, thiab tshuaj tua kab mob. Lawv pab txo kev tawg, tawg, thiab deterioration, prolonging lub neej kev pab cuam ntawm kev tsim kho tej yaam num.

Hydroxypropyl Methylcellulose (HPMC) thiab Hydroxyethyl Cellulose (HEC) ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua haujlwm, kev ua haujlwm tau zoo, adhesion, durability, thiab tag nrho cov khoom siv hauv tsev. Lawv cov khoom siv ntau yam ua rau lawv cov khoom muaj txiaj ntsig zoo hauv ntau hom kev tsim kho, ua kom muaj kev vam meej thiab ntev ntawm ntau yam kev tsim kho.