ib tug. Qhov sib txawv ntawm adulterated hydroxypropyl methylpeculose (HPMC) thiab ntshiab HydroxyPropylropylulose (HPMC)
1. Pom zoo: HydroxyPropylropy Holmc zoo nkaus li fluffy thiab muaj qhov tsawg bultity, xws li 0.3-0.4g / ml; Adulterated HydroxyPropyyl Methylcellose HPMC muaj cov khoom zoo dua thiab muaj qhov sib txawv zoo dua, thiab muaj qhov sib txawv ntawm cov khoom lag luam.
2. Cov xwm txheej: Ntshiab Hydroxypropyl methylropylulose hpmc hmoov yog fibrous nyob rau hauv lub tshuab tsom lossis lub iav loj; Thaum adulterated hydroxypropyl methylpcellulose hpmc tuaj yeem pom raws li cov khib nyiab granular lossis muaju nyob rau hauv lub tsom iav lossis lub khob loj.
3. Cov ntxhiab: Ntshiab HydroxyPropylenchylulose HPMC tsis hnov ntxhiab tsw ntawm ammonia, hmoov txhuv nplej siab thiab dej cawv; Adulterated HydroxyPropyyl Methylcellose HPMC tuaj yeem hnov tsw muaj ntxhiab tsw ntxhiab tsw, txawm tias nws yog tas mus li, nws yuav hnov hnyav.
4. Cov tshuaj aqueous: Hydroxypropyl methylropylulose HPMC AQhov teeb meem Adulterated HydroxyPropyyl Metthylcellose HPMC Aqueous Dlu yog Turnid, Thiab Cov Dej Tuav Haujlwm Tsis Yooj Yim kom ncav cuag 80%.
Qhov thib ob, cov dej tuav ntawm hydroxypropyl methylcellose HPMC, paub qhov txawv thiab qhov tsis zoo:
Cov dej tuav tseg ntawm methyl cellulose hauv qab cov kev mob siab yog qhov ntsuas tau qhov ua tau zoo ntawm methyl cellulose ether. Yam khoom xws li cua kub, ntsuas kub thiab cua kub yuav cuam tshuam rau cov dej colatilization thiab gypsum-based khoom. Yog li ntawd, nyob rau lub caij sib txawv, muaj qee qhov sib txawv ntawm cov dej ua kom ruaj khov ntawm cov khoom lag luam nrog tib tus nqi HPMC ntxiv. Hauv kev tsim kho tshwj xeeb, cov dej khaws cov nyhuv khaws cia ntawm cov slurry tuaj yeem hloov kho los ntawm nce lossis txo tus HPMC ntxiv. Zoo heev hydroxypropyl methylcellose HPMC cov khoom tuaj yeem daws tau qhov teeb meem ntawm dej rov qab nyob rau hauv qhov kub.
Cov khoom siv ua kom zoo nkauj zoo li cas thiab muab cov khoom ntub dej ua ke, thiab cov khoom siv ntub dej, thiab cov khoom siv ntub dej, thiab cov khoom siv ntub dej, thiab cov khoom siv ntub dej, thiab cov khoom siv ntub dej, thiab cov khoom siv ntub dej, thiab cov khoom siv ntub dej, thiab cov khoom siv ntub dej, thiab cov khoom siv ntub dej, thiab cov khoom siv ntub dej, thiab cov khoom siv ntub dej, thiab cov khoom siv ntub dej, thiab cov khoom siv ntub dej, thiab qhwv txhua qhov sib xyaw ua ke lub zog thiab lub zog compressive ntawm cov khoom. High-zoo hydroxelyl methylcellose HPMC, nws cov kev sib tw yog tus lej ntawm cov pa roj av los ua cov pa roj hmab los ua ke los ntawm cov huab cua evape thiab ua tiav cov dej kom siab.
Yog li ntawd, nyob rau hauv high-kub lub caij ntuj sov, nyob rau hauv thiaj li yuav tsum tau ntxiv cov dej khov kho, nws yuav tsum tau ntxiv lub zog zoo li cov khoom siv muaj txiaj ntsig zoo, nws yuav tsum tau tawg, kev ua haujlwm los ntawm kev ziab ntau dhau. Teeb meem, tab sis kuj tseem nce cov kev tsim kho cov neeg ua haujlwm. Raws li cov tee ntsuas kub, tus nqi ntawm cov dej HPMC ntxiv tuaj yeem txo qis qis, thiab tib cov nyhuv retentent tau ua tiav.
3. Cais ntawm HydroxyPropyyl methylcellose HPMC
Hauv kev tsim kho kev tsim kho, HydroxyPropyl methylcellose HPMC feem ntau muab tso rau hauv dej nruab nrab, thiab cov khoom HPMC yog yaj nyob ib leeg los txiav txim rau kev sib cais. Tom qab tau muab tso rau hauv cov dej nruab nrab ib leeg, cov khoom uas cov pob txha ceev sai uas tsis muaj dispersing yog ib qho khoom tsis muaj kev kho deg; Tom qab tau muab tso rau hauv dej nruab nrab ib leeg, cov khoom lag luam uas tuaj yeem faib tawm thiab tsis clump ua ke yog ib yam khoom nrog kev kho mob saum npoo. Thaum lub qhov chaw tsis kho hydroxypropyl methylpcelyl ntawm agglomeration thiab agglomeration sai sai, uas yog tam sim no hu ua kev sib cais qeeb hauv cov khoom lag luam.
Deg-kho hydroxypropyl methylcellose HPMC cov khoom lag luam, hauv nruab nrab ntawm dej, cov khoom muaj peev xwm tuaj yeem tsis muaj agglomeration, tab sis cov khoom viscosity yuav tsis tam sim ntawd. Tom qab so rau ib lub sijhawm ntawm lub sijhawm, cov qauv tshuaj ntawm kev kho tshuaj lom neeg raug puas tsuaj, thiab dej tuaj yeem yaj cov lus HPMC. Nyob rau lub sijhawm no, cov khoom siv tau tag nrho cov khoom tawg thiab nqus cov dej txaus, yog li cov khoom yuav tsis agglomerate lossis agglomerate tom qab sib nrauj. Kev rho tawm ceev ceev ceev thiab kev sib cais ceev yog nyob ntawm cov qib ntawm kev kho deg. Yog hais tias txoj kev kho deg yog me ntsis, lub dispersion ceev yog qhov qeeb thiab nrawm nrawm nrawm; Thaum lub sij hawm cov khoom lag luam nrog kev kho kom sib sib zog nqus tau ceev nrawm nrawm nrawm thiab qeeb nrawm nrawm. Yog tias koj xav ua kom cov khoom lag luam no sai sai, koj tuaj yeem tso ib qho khoom me me ntawm cov tshuaj Alkaline thaum lawv tau ploj ib leeg. Kev lag luam tam sim no feem ntau hu ua cov khoom lag luam tam sim ntawd. Cov yam ntxwv ntawm kev kho mob HPMC yog: hauv cov tshuaj aqueous, cov lus tuaj yeem raug faib tawm sai sai hauv lub xeev alkaline, thiab yaj maj mam ua hauv nruab nrab thiab acidic xeev.
Cov yam ntxwv ntawm kev tsis kho hydroxypropylropen HPMC yog: ib tug me nyuam yaus xaus rau hauv acidic, thiab tsis tuaj yeem disperse absolles hauv cov kua, ua rau pawg thiab agglomeration. Hauv kev ua haujlwm tiag tiag, tom qab kev faib tawm lub cev ntawm cov khoom lag luam thiab cov khoom siv roj av, xis mas, thiab lwm yam, thiab tsis muaj agglomeration lossis agglomeration. Thaum nws yog ib qho tsim nyog los yaj HPMC cov khoom sib cais HPMC sib cais, cov khoom no yuav tsum tau siv nrog kev ceev faj, raws li nws yuav agglomerate thiab tuav ua ke. Yog tias nws yog ib qho tsim nyog los yaj cov khoom tsis-saum hydroxyprropyl cais, nws yuav tsum tau ua kom tsis zoo HPMCLCELLOSE, nws yuav tsum tau ua txhua yam dej kub, thiab tom qab ntawd txias kom yaj.
Hauv kev lag luam ntau lawm, cov khoom lag luam no feem ntau tau tawg nrog lwm cov khoom siv cov khoom siv tsis sib xws, thiab nws cov kev cais tawm tsis txawv ntawm cov khoom tsis kho. Nws tseem haum rau siv hauv cov khoom uas tau yaj ib leeg, tsis muaj nchuav lossis cov qog. Tus qauv tshwj xeeb ntawm cov khoom lag luam tuaj yeem raug xaiv raws li kev sib cais yuav tsum tau ua los ntawm kev tsim kho.
Thaum lub sij hawm tsim qauv, txawm tias nws yog cementum-raws li surrry, feem ntau ntawm lawv yog qhov me me, uas tuaj yeem yog tusyees dispersed ntawm cov lus no. Thaum dej ntxiv, HPMC yuav yaj sai.
Lub Sijhawm Post: Dec-02-2022