Ntau tus neeg siv tsis tshua tau them nyiaj rau qhov teeb meem ntawm hydroxypropyl methyl cellulose HPMC gel kub. Niaj hnub no, hydroxypropyl methyl cellulose HPMC feem ntau yog qhov txawv ntawm viscosity, tab sis rau qee qhov chaw tshwj xeeb thiab kev lag luam tshwj xeeb, tsuas yog cov viscosity ntawm cov khoom tau cuam tshuam. Tsis txaus, cov hauv qab no luv luv qhia txog hydroxypropyl methylcellulose HPMC gel kub.
Cov ntsiab lus ntawm methoxy pawg yog ncaj qha ntsig txog qib ntawm etherification ntawm cellulose ether. Cov ntsiab lus ntawm methoxy pawg tuaj yeem hloov kho los ntawm kev tswj cov qauv, qhov kub thiab txias thiab lub sijhawm tshuaj tiv thaiv. Nyob rau tib lub sijhawm, qib ntawm etherification cuam tshuam rau qib ntawm kev hloov ntawm hydroxyethyl lossis hydroxypropyl. Yog li ntawd, cov dej tuav ntawm cellulose ether nrog high gel kub yog feem ntau me ntsis zuj zus. Cov txheej txheem tsim khoom no yuav tsum tau tshawb xyuas, yog li nws tsis yog vim tias cov ntsiab lus methoxy tsawg, tus nqi ntawm cellulose ether yog qis, ntawm qhov tsis sib xws, tus nqi yuav siab dua.
QUALICELL's hydroxypropyl methyl cellulose HPMC hydroxypropyl cov ntsiab lus yog 25%. Qhov kub ntawm gel yog qhov tseem ceeb rau kev siv cellulose ether. Thaum lub ambient kub tshaj qhov kub ntawm gel, cellulose ether yuav precipitate tawm hauv dej thiab poob nws cov dej tuav. Qualicell's cellulose ether gel qhov kub thiab txias yog 65 degrees, uas tuaj yeem ua tau raws li qhov xav tau ntawm mortar thiab putty siv ib puag ncig (tshwj tsis yog qhov chaw tshwj xeeb). Yog tias koj yuav QualiCell HPMC, thov qhia ua ntej yog tias koj muaj cai tshwj xeeb.
Post lub sij hawm: Jan-06-2022