HPMC, tseem hu ua HydroxyPropyyl methylulose, yog qhov ua tau zoo ntxiv dav siv nyob rau hauv kev tsim kho kev tsim kho, tshwj xeeb tshaj yog nyob rau hauv kev tsim cov phab ntsa putty. Phab Ntsa Putty yog siv los npaj thiab theem phab ntsa ua ntej tha xim, yog li muab kev ua tiav zoo tshaj plaws.
Coob tus neeg tsim tau muaj teeb meem nrog sagging yav dhau los. Sag tshwm sim thaum putty pib swb rau ntawm phab ntsa vim nws qhov hnyav. Qhov no ua rau ib qho tsis sib xws thiab tsis muaj kev ua tiav uas siv sijhawm ntau thiab kev rau siab kho. Txawm li cas los xij, cov neeg tsim vaj tsev tau pom ib qho kev daws teeb meem los ntawm kev ntxiv HPMC mus rau lub phab ntsa putty, uas pab txhim kho cov khoom lag luam tawm hws thiab tag nrho cov khoom kawg.
Muaj ntau qhov laj thawj vim li cas HPMC yog xws li ntxiv addective. Ua ntej, nws ua raws li cov tuab dua, uas txhais tau tias nws yuav pab txhawb cov viscosity ntawm cov khoom siv putty. Qhov nce viscosity no ua rau nws nyuaj rau cov khoom siv kom xaub tawm ntawm phab ntsa thiab pab txhawb cov nplaum zoo dua rau cov chaw. Lub putty txoj kev ua kom zoo nkauj viscosity kuj ua rau nws sau micracks thiab cov kab noj hniav me hauv phab ntsa, muab cov smoother, ntau txawm saum npoo. Cov yeeb yam no tseem pab txo cov neeg ua kom tiav kom thiaj li yuav tsum tau npog thaj chaw thaj chaw, ua rau muaj kev daws teeb meem ntau dua.
Thib ob, HPMC ua si lub luag haujlwm tseem ceeb hauv kev tswj kom qhuav ntawm phab ntsa putty. Lub ziab ceev ncaj qha cuam tshuam rau cov sag tsis kam ntawm lub putty, thiab qeeb-qhuav putty feem ntau ruaj khov thiab tsis yooj yim rau SAG. HPMC pab tswj hwm tus nqi ntawm evaporation dej nyob rau hauv cov khoom siv putty, uas nyob rau hauv lem cuam tshuam nws lub sijhawm qhuav. Cov ntaub ntawv no tau ua rau muaj qhov ruaj khov dua thiab sib xws ruaj khov, txo qis tusyees, txo lub caij nyoog ntawm sagging.
HPMC tseem tuaj yeem siv los txhim kho cov nplaum ntawm phab ntsa putty thiab substrate. Adhesion yog hais txog qib uas ib tug putty cov khoom ua rau saum npoo nws tau thov rau. HPMC tuaj yeem txhim kho adhesion vim tias nws muab cov yeeb yaj kiab tiv thaiv nyob rau saum npoo, uas txhim kho cov nplaum ntawm lub putty rau subtty rau subtty mus rau subtty mus rau subtty mus rau subtty mus rau subtty mus rau subtty mus rau subtty mus rau subtty mus rau subtty mus rau subtty mus rau subtty mus rau subtty rau subtty.
Tsis tas li ntawd, HPMC kuj tseem tuaj yeem pab khaws cov dej noo hauv phab ntsa putty. Txawm hais tias dej yog qhov nruab nrab tseem ceeb rau kev ua tiav thiab solidification, nws kuj yog qhov ua rau muaj kev tawg thiab sagging ntawm cov khoom thaum cov dej yaj sai. HPMC pab kom khaws cov dej noo hauv cov khoom siv putty rau lub sijhawm ntev, tso cai rau lub putty los daws tusyees thiab qhuav yam tsis muaj sagging.
Txhawm rau kom suav, HPMC yog qhov tseem ceeb hauv phab ntsa putty, uas ua lub luag haujlwm tseem ceeb hauv kev txhim kho cov khoom ntawm phab ntsa putty. Nrog nws cov thickening, kom qhuav tus tswj thiab dej tswj kev txhim kho, kev ua kom cov teeb meem ADH Qhov kom zoo dua tsis yog tsuas yog nyob rau hauv smoother, ntau ruaj khov saum npoo tiav, tab sis kuj nyob rau hauv tus nqi-ua tau zoo ntawm kev daws. Yog li ntawd, nws yog qhov yuav tsum muaj kom paub txog thiab hais txog kev ua haujlwm Irreplaceable ntawm HPMC hauv kev tsim kho.
Lub sij hawm Post: Lub Yim Hli 15-2023