1. Txhim kho cov dej ceev ceev ntawm cug
HydroxyPropyyl methylcellulose (HPMC) yog ib tug neeg sawv cev zoo tshaj plaws uas tau nqus dej thiab khaws cov dej los ntawm kev sib sau cov qauv network hauv lub cug. Qhov dej ua kom lub sijhawm no yuav ua kom lub sijhawm ua haujlwm ntawm cov dej cug, yog li ncua lub ntim shrinkage tawg los ntawm dej evaporation sai sai. Nyob rau tib lub sijhawm, qhib sijhawm ntev dua thiab kev tsim kho lub sijhawm thiab kev tsim kho lub sijhawm thiab txhim kho kom txhim kho kev ua haujlwm zoo thiab txo qhov tau ntawm cov kab nrib pleb.
2. Txhim kho cov haujlwm ua haujlwm thiab rheology ntawm collaph
HPMC tuaj yeem kho cov viscosity ntawm cug, ua kom nws yooj yim dua ua haujlwm. Qhov kev txhim kho no tsis tsuas yog txhim kho fluidity thiab workrch ntawm cug, tab sis kuj txhim kho nws cov adhesion thiab cov kev pab cuam ntawm substrate. Tsis tas li ntawd, ntxhov siab ®
3. Txhim kho cov nplaum thiab tawg tawm ntawm cug
Tshuaj khib viscc formed los ntawm HPMC hauv kev tshuaj khib nyiab tuaj yeem sau qhov pores ntawm lub cug, thiab txhim kho cov nplaum ntawm lub tshuaj khib nyiab mus rau substrate. Qhov tsim ntawm zaj yeeb yaj kiab no tsuas yog ua rau tag nrho cov qauv ntawm lub tshuaj khib, yog kuj txhim kho cov capt tsis kam ntawm cov tshuaj khib. Ib qho ntxiv, cov qauv polymer ntawm HPMC tuaj yeem faib cov kev ntxhov siab thaum lub zog kho kom zoo lossis deformation ntawm cov txheej txheem sab nraud, thiab pab tiv thaiv ntxiv cov kab nrib pleb.
4. Tswj cov shrinkage thiab yas shrinkage ntawm cug
Tshuaj khib feem ntau tau rau shrinkage cracks vim dej evaporation thaum HPMC tuaj yeem ncua lub ntim shrinkage tshwm sim los ntawm shrinkage. Tsis tas li ntawd, HPMC kuj tseem tuaj yeem txo qhov kev pheej hmoo ntawm cov yas shrinkage tawg, tshwj xeeb tshaj yog nyob rau hauv thawj zaug teeb tsa theem cug. Nws tswj cov dej tsiv teb tsaws chaw thiab faib dej, txo cov capillary nruj thiab kev ntxhov siab saum npoo, thiab txo qis qhov tshwm sim ntawm lub tshuaj khib.
5. Txhim Kho Lub Freeze-Thaw Resistge ntawm cug
Qhov kev sib txuas ntawm HPMC tseem tuaj yeem txhim kho lub khov-thaw ua tsis huv ntawm cug. Nws cov dej khaws cia thiab ua yeeb yaj kiab-ua muaj peev xwm pab txo cov dej tshuaj tua hluav taws xob, zam kev puas tsuaj rau cov qauv tshuaj cug vim qhov kev nthuav dav ntawm cov dej khov. Tsis tas li ntawd, qhov ua tau zoo ntawm cov qauv puv ntawm cug ntawm HPMC kuj tseem tuaj yeem txo qhov kev sib xyaw ntawm cov colle ua hauj lwm cug.
6. Siv lub sijhawm ntawm kev ua haujlwm thiab ua kom zoo rau microstructure
HPMC ntev txog cov tshuaj tiv thaiv dej ntawm cov tshuaj cug, tso cai cemasy cov tshuaj cug ntau tusyees thiab txhim kho qhov ceev ntawm cug. Qhov kev txhim kho ntawm microstructure tuaj yeem txo cov khoom ntawm sab hauv thiab tsis txhim kho lub cug cug. Ib qho ntxiv, Polymer saw ntawm HPMC tuaj yeem tsim cov khoom siv hydration, ntxiv txhim kho lub zog thiab tawg ntawm cug.
7. Txhim kho deformation tiv taus thiab cov yam ntxwv nqus kom haum
Kev txhawj xeeb ® Lub zog nqus cov cuab yeej no yog qhov tshwj xeeb rau kev tawg, uas tuaj yeem txo cov kab nrib pleb thiab kev nthuav dav ntev ntawm kev sib sau.
HPMC Txhim kho cov kab nrib tawm ntawm cug ntawm ntau yam los ntawm kev sib xyaw ntawm cov khoom siv hluav taws xob, ua kom zoo dua qhov ua haujlwm zoo, suav nrog kev txhim kho lub sijhawm qhib thiab anti-khov-thau muaj peev xwm. Hauv cov ntaub ntawv hauv tsev niaj hnub no, HPMC tau dhau los ua qhov tseem ceeb admixture los txhim kho lub catchy kev tshuaj khib, thiab nws cov ntaub ntawv thov kev cia siab yog qhov dav heev.
Lub Sijhawm Post: Jan-08-2025