Hydroxypropyl methylcellulose (HPMC) yog ib qho kev siv polymer additive nyob rau hauv kev tsim kho kev lag luam, tshwj xeeb tshaj yog nyob rau hauv pob zeb ntau lawm. Nws yog siv los ua tus neeg sawv cev thickening, dej tuav tus neeg saib xyuas thiab khi rau hauv cov pob zeb ntub dej. HPMC muaj txiaj ntsig zoo rau kev ua vaj tse nyob rau hauv ntau txoj hauv kev, thiab nws txoj kev siv yuav pab txo qis cov kab nrib pleb hauv pob zeb.
Shrinkage tawg feem ntau tshwm sim thaum lub sij hawm qhuav txheej txheem ntawm pob zeb. Thaum dej evaporates los ntawm cov pob zeb nto, cov pob zeb yuav shrinks. Qhov txo qis hauv ntim ua rau muaj zog tensile uas tuaj yeem ua rau tawg. Txawm li cas los xij, HPMC txo cov dej ntsiab lus ntawm cov pob zeb sib xyaw ua ke, yog li txo cov evaporation ntawm cov dej thiab txo tus nqi ntawm cov shrinkage uas tshwm sim thaum cov pob zeb qhuav.
Lwm qhov ua haujlwm ntawm HPMC hauv pob zeb yog tias nws tsim cov yeeb yaj kiab nyias ntawm cov pob zeb, uas yuav pab txo qis cov dej evaporation. Cov yeeb yaj kiab pab tswj qhov chaw noo nyob ib puag ncig ntawm cov pob zeb, yog li txhim kho cov txheej txheem kho. Txhim kho curing txhim khu cov khoom ntawm pob zeb, nrog rau lub zog, durability thiab tsis kam rau shrinkage cracking.
Tsis tas li ntawd, HPMC txhim kho kev ua haujlwm ntawm pob zeb, ua kom yooj yim rau kev sib xyaw thiab qhov chaw. Qhov no txhim kho qhov zoo ntawm cov pob zeb thiab txo qhov kev pheej hmoo ntawm cov teeb meem xws li kev sib cais thiab los ntshav. Qhov no yog vim HPMC ua cov roj nplua nyeem, txhawb kev sib xyaw ua ke ntawm cov khoom xyaw hauv cov pob zeb sib xyaw.
HPMC kuj tau txais txiaj ntsig zoo los ntawm kev txhim kho nws cov peev txheej kev sib txuas thiab kev ua kom zoo. Thaum siv cov txheej txheem sib xyaw qhuav, HPMC xyuas kom meej tias cov pob zeb sib xyaw yog homogeneous thiab cov additives xws li aggregates yog sib npaug faib thoob plaws hauv qhov sib tov. Qhov no pab txo qis shrinkage thiab tawg ntawm cov pob zeb thiab ua kom cov khoom zoo kawg nkaus.
HPMC kuj muaj lwm yam zoo uas ua rau nws zoo tagnrho rau kev siv pob zeb. Nws yog non-toxic thiab biodegradable, ua rau nws ib puag ncig tus phooj ywg khoom. Nws tseem muaj lub neej txee ntev, kom ntseeg tau tias nws khaws nws cov txiaj ntsig txawm tias khaws cia rau lub sijhawm ntev. Tsis tas li ntawd, nws yog ib qho khoom siv tau zoo uas txhim kho cov khoom ntawm cov pob zeb, ua rau nws muaj txiaj ntsig ntxiv rau kev tsim kho kev lag luam.
HPMC yog ib qho tseem ceeb additive nyob rau hauv niaj hnub cement technology thiab plays lub luag hauj lwm tseem ceeb nyob rau hauv txo shrinkage tawg nyob rau hauv pob zeb. Nws cov kev sib txuas zoo heev thiab cov khoom tuav dej tso cai rau nws siv los txhim kho lub cev thiab lub zog ntawm cov pob zeb. Los ntawm kev txwv qhov shrinkage, HPMC xyuas kom meej tias cov pob zeb khaws nws cov qauv kev ncaj ncees, ua rau nws muaj kev nyab xeeb thiab ruaj khov dua. Kev siv HPMC hauv kev tsim ua vaj tse tuaj yeem muaj kev cuam tshuam zoo rau ib puag ncig, txo cov nqi, txhim kho kom zoo, thiab txhim kho tag nrho cov qauv zoo. Yog li ntawd, nws yog qhov pom zoo rau txhua qhov kev tsim kho uas yuav tsum tau qis shrinkage tawg pob zeb.
Post lub sij hawm: Sep-19-2023